US20170150049A1 - Wireless camera system and methods - Google Patents

Abstract

Camera systems and methods configured to receive power wirelessly are described. A wireless energy transfer system according to some examples includes a transmitter of wireless energy located within a communication device, such as a mobile phone, or attached to the communication device and a distance separated receiver located within an electronic wearable device other than the communication device, such as a wearable camera.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• This application is a continuation of pending U.S. application Ser. No. 14/757,753, filed Dec. 23, 2015. The aforementioned application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/095,920 entitled “CAMERA SYSTEM COMPRISING WIRELESS POWER AND DATA TRANSFER”, filed Dec. 23, 2014. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/104,418 entitled “ENHANCED CAMERA SYSTEM COMPRISING WIRELESS POWER AND DATA TRANSFER”, filed Jan. 16, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/113,573 entitled “ENHANCED CAMERA SYSTEM COMPRISING HIGHLY RESONANT COUPLING”, filed Feb. 9, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/116,648 entitled “FURTHER ENHANCED CAMERA SYSTEM COMPRISING HIGH RESONANT COUPLING”, filed Feb. 16, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/127,622 entitled “HIGHLY RESONANT COUPLED CAMERA SYSTEM”, filed Mar. 3, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/128,362 entitled “CAMERA EYEWEAR SYSTEM”, filed Mar. 4, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/153,999 entitled “CAMERA SYSTEM CAPABLE OF WIRELESS ENERGY TRANSFER”, filed Apr. 28, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/154,019 entitled “CAMERA EYEWEAR SYSTEM”, filed Apr. 28, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/167,739 entitled “FURTHER ENHANCED CAMERA SYSTEM CAPABLE OF WIRELESS ENERGY TRANSFER”, filed May 28, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/173,788 entitled “ROBUST CAMERA SYSTEM CAPABLE OF WIRELESS ENERGY TRANSFER”, filed Jun. 10, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/180,199 entitled “WIRELESS ENERGY TRANSFER CAMERA SYSTEM”, filed Jun. 16, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/186,341 entitled “WIRELESS ENERGY TRANSFER CAMERA SYSTEM”, filed Jun. 29, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
• U.S. application Ser. No. 14/757,753 claims the benefit under 35 U.S.C. 119 of the earlier filing date of U.S. Provisional Application 62/189,916 entitled “WIRELESS ENERGY TRANSFER CAMERA SYSTEM COMPRISING ENERGY HARVESTING”, filed Jul. 8, 2015. The aforementioned provisional application is hereby incorporated by reference in its entirety, for any purpose.
TECHNICAL FIELD
• The present disclosure relates to systems and methods for providing power wirelessly to one or more electronic devices such as cameras.
BACKGROUND
• The number and types of commercially available electronic wearable devices continues to expand. Forecasters are predicting that the electronic wearable devices market will more than quadruple in the next ten years. Some hurdles to realizing this growth remain. Two major hurdles are the cosmetics/aesthetics of existing electronic wearable devices and their limited battery life. Consumers typically desire electronic wearable devices to be small, less noticeable, and require less frequent charging. Typically, consumers are unwilling to compromise functionality to obtain the desired smaller form factor and extended battery life. The desire for a small form factor yet a longer battery life are goals which are in direct conflict with one another and which conventional devices are struggling to address. Further solutions in this area may thus be desirable.
SUMMARY
• A camera according to some examples of the present disclosure may include an image capture device, a receiver configured to receive power wirelessly from a distance separated transmitting coil of a wireless power transfer system which includes a base unit, a rechargeable battery coupled to the receiver for storing wirelessly received power, and a memory configured to store images captured with the image capture device. In some examples, the another computing device may be the base unit of the wireless power transfer system. The camera may be configured to transfer data including one or more images captured with the image capture device to another computing device. In some examples, the camera may be a wearable camera. In some examples, the camera may be waterproof. In some examples, the camera may be devoid of a view finder.
• In some examples, the camera's receiver may include a receiving coil having a magnetic core. In some examples, the magnetic core may include a ferrite core. In some examples, the receiving coil is configured to receive power from the transmitting coil regardless of orientation between the receiving and transmitting coils. In some examples, at least the image capture device, the receiving coil, the processor, and the memory are enclosed in a housing configured to be movably coupled to a wearable article. In some examples, the housing includes a guide comprising one or more magnets for magnetically attaching the wearable camera to eyewear. In some examples, the housing may include a first opening and an optically transparent material spanning the first opening, and a second opening and an acoustically transparent material spanning the second opening.
• In some examples, the camera may include a microphone. In some examples, the camera may be configured to detect an audible command and capture an image responsive to the audible command. In some examples, the camera may include a transmitter configured to transmit one or more of the images stored in the memory to the wireless power transfer system. In some examples, the camera may be configured to broadcast a proximity signal for detecting the wireless power receiver in proximity. In some examples, the camera may include at least one user control for receiving user input. In some examples, the at least one user control may include a capacitive switch. In some examples, the camera may include a status indicator, a privacy indicator, or combinations thereof. In some examples, the camera may include an aperture for engaging with a securing ring. In further examples, the camera may include a guide configured to engage a temple guide in an eyewear frame, and wherein a plane of a diameter of the aperture is parallel with a longitudinal direction of the guide. In some examples, the securing ring may be made of a transparent plastic material. In some examples, the securing ring may include a core diameter greater than 0.01 mm and less than2 nun. In some examples, the core diameter may be less than 1 mm.
• A system according to the present disclosure may include a base unit which includes a transmitter configured for wireless power delivery and a battery coupled to the transmitter, wherein the transmitter includes a transmitting coil having a magnetic core. The system may further include a camera, which may be a wearable camera, separated from the base unit, the camera including a receiver inductively coupled to the transmitter to receive power from the base unit while the camera remains within a charging distance from the base unit, wherein the receiver includes a receiving coil having a magnetic core, and wherein a dimension of the transmitting coil is at least twice a dimension of the receiving coil. In some examples, the dimension of the transmitting coil may be a diameter of the transmitting coil, a length or a diameter of a wire forming windings of the transmitting coil, a number of windings of the transmitting coil, or a length, a diameter or a surface area of the core of the transmitting coil, and the dimension of the receiving coil may respectively be a diameter of the receiving coil, a length or a diameter of a wire forming windings of the receiving coil, a number of windings of the receiving coil, or a length, a diameter or a surface area of the core of the receiving coil. In some examples, the transmitter and receiver may be configured for operation with a Q value less than 100. In some examples, the transmitter and receiver may be configured to operate at a frequency within the range of 50 kHz or 500 kHz, wherein the transmitter and receiver are configured to operate in weak resonance, and wherein the system is configured to operate using an amount of guided flux. In some examples, the base unit may be mechanically coupled to a portable communication device. In some examples, the transmitter may include an omnidirectional antenna configured to transmit power to one or more electronic devices including the camera regardless of orientation of the electronic devices with respect to the base unit. In some examples, the camera, which may be a wearable camera, may be configured to be magnetically attached to eyewear.
• A method according to some examples may include placing a base unit proximate a wearable camera, the base unit comprising a transmitting coil configured to inductively couple with a receiving coil in the wearable camera to wirelessly transmit power to the wearable camera, detecting the wearable camera with the base unit, and wirelessly transmitting power from the base unit to the wearable camera while the electronic device remains within a charging range of the base unit or until a charge state signal of the wearable camera corresponds to a fully charged state of the wearable camera. In some examples, the method may further include capturing an image responsive to an audible command detected by the wearable camera. In some examples, the method may further include wirelessly transmitting an image captured by the camera to the base unit. In some examples, the detecting the wearable camera includes automatically detecting a signal from the wearable camera, the signal broadcast by the wearable camera or transmitted to the base unit responsive to an interrogation signal from the base unit. In some examples, the wirelessly transmitting power from the base unit includes broadcasting power signals at a body-safe level. In some examples, the wirelessly transmitting power from the base unit includes broadcasting power signals at a frequency within the range of 50 kHz or 500 kHz.
BRIEF DESCRIPTION OF THE DRAWINGS
• Features, aspects and attendant advantages of the present invention will become apparent from the following detailed description of various embodiments, including the best mode presently contemplated of practicing the invention, when taken in conjunction with the accompanying drawings, in which:
• FIG. 1 illustrates an isometric view of a camera in accordance with some examples herein;
• FIG. 2 illustrates a cross-sectional view of the camera inFIG. 1 taken at line2-2;
• FIGS. 3A and 3B illustrate exploded views of the camera inFIG. 1;
• FIGS. 4A-4G illustrate isometric, top, bottom, front, back, left and right side views, respectively, of the camera inFIG. 1;
• FIG. 5 illustrates a block diagram of a wireless power transfer system according to examples of the present disclosure;
• FIG. 6 illustrates examples of electronic devices attached to eyewear in accordance with the present disclosure;
• FIG. 7 illustrates an example of a receiving coil for an electronic device such as the camera inFIG. 1, and a transmitting coil for a base unit in accordance with the present disclosure;
• FIG. 8 illustrates a block diagram of a base unit implemented in the form of a mobile phone case form factor according to examples of the present disclosure;
• FIGS. 9A and 9B illustrate isometric and exploded isometric views of a base unit implemented as a mobile phone case according to further examples of the present disclosure;
• FIG. 10 illustrates a flow chart of a process according to some examples herein;
• FIG. 11 illustrates a typical use scenario of a base unit with a wearable camera in accordance with the present disclosure;
• FIGS. 12A-F illustrate views of a camera in accordance with further examples herein;
• FIG. 13 illustrates an isometric view of a camera. In accordance with yet further examples herein;
• FIG. 14 illustrates a flow diagram of a process for automatic processing of an image captured by a camera in accordance with some examples herein;
• FIG. 15 illustrates a system for automatic processing of images in accordance some examples herein.
DETAILED DESCRIPTION
• Systems, methods and apparatuses for wirelessly powering electronic devices, for example a camera such as a wearable camera, are described. According to some examples, an electronic device, for example a wearable camera, may be configured to receive power wirelessly from a distance separated transmitter of a base unit, which may be part of a wireless power transfer system. The base unit and/or wearable electronic device may be part of an ecosystem which may include any number of energy transmitting devices (e.g., base units) and any number of energy receiving devices (e.g., wearable electronic devices). The electronic device (e.g., camera) may be placed within a charging zone (e.g., hotspot) of the base unit and configured to receive power wirelessly from the base unit while the electronic device remains within the hotspot. The electronic device may include a receiver a (e.g., a receiving coil) and the base unit may include a transmitter (e.g., transmitting coil). The receiver of the wearable electronic device and the transmitter of the base unit may be inductively coupled to enable the wearable electronic device to receive power wirelessly from the base unit. The transmitter and receiver may be configured to operate at a body safe frequency. For example, the transmitter and receiver may be configured to operate at a frequency within the range of about 50 kHz or about 500 kHz. In some examples, the transmitter and receiver may be configured to operate at a frequency within the range of about 75 kHz to about 175 kHz. In some examples, the transmitter and receiver may be configured to operate in weak resonance. In some examples, the transmitter and receiver may be configured for operation with a Q value less than 100. In some examples, the wireless power transfer system may operate using an amount of guided flux.
• As described, the electronic device according to some examples herein may be a camera.FIGS. 1-4 show views of acamera1200 in accordance with some examples of the present disclosure. Thecamera1200 may be configured to record audiovisual data. Thecamera1200 may include animage capture device1210, abattery1220, areceiver1230, amemory1240, and acontroller1250. Theimage capture device1210 may include animage sensor1212 and an optical component (e.g., camera lens1214). The image capture device may be configured to capture a variety of visual data, such as image stills, video, etc. Thus, images or image data may interchangeably be used to refer to any images (including video) captured by thecamera1200. In some examples, thecamera1200 may be configured to record audio data. For example, thecamera1200 may include amicrophone1268 operatively coupled to thememory1240 for storing audio detected by themicrophone1268.
• Thecontroller1250 may be implemented in hardware and/or software. For example, thecontroller1250 may be implemented using one or more application specific integrated circuits (ASICs). In some examples, some or all of the functionality of thecontroller1250 may be implemented in processor-executable instructions, which may be stored in memory onboard the camera (e.g., memory1240). In some examples the camera may wirelessly receive instructions for performing certain functions of the camera, e.g., initiating image/video capture, initiating data transfer, setting parameters of the camera, and the like. The processor-executable instructions, when executed by a processor1252 onboard thecamera1200 may program thecamera1200 to perform functions, as described further below. Any combination of hardware and/or software components may be used to implement the functionality of a camera according to the present disclosure (e.g., camera1200).
• Thebattery1220 may be a rechargeable battery such as a Nickel-Metal Hydride (NiMH), a Lithium ion (Li-ion), or a Lithium ion polymer (Li-ion polymer) battery. Thebattery1220 may be operatively coupled to the receiver to store power received wirelessly from a distance separated wireless power transfer system. In some example, the battery may be coupled to energy generator (e.g., an energy harvesting device) onboard the camera. Energy harvesting devices may include, but are not limited to, kinetic-energy harvesting devices, solar cells, thermoelectric generators, or radio-frequency harvesting devices.
• Thereceiver1230 may include a receivingcoil1232 configured to couple inductively with a distance separated transmitting coil (e.g.,Tx coil112, Tx coil312), which may be part of a base unit (e.g.,base unit100,300) in a wireless power transfer system (e.g., system10). The receivingcoil1232 may include amagnetic core1234 withconductive windings1236. The windings may include copper wire (also referred to as copper windings). In some examples, the copper wire may be monolithic copper wire (e.g., single-strand wire). In some examples, the copper wire may be multi-strand copper wire (e.g., Litz wire), which may reduce resistivity due to skin effect in some examples, which may improve the power transfer between the receiving coil and transmitting coil. In some examples, themagnetic core1234 may be a ferrite core (interchangeably referred to as ferrite rod). The ferrite core may comprise a medium permeability ferrite, for example78 material supplied by Fair-Rite Corporation. In some examples, the ferrite core may comprise a high permeability material, such as Vitroperm500E supplied by Vacuumschmelze in Germany. Ferrite cores comprising other ferrite materials may be used. In some examples, the ferrite may have a medium permeability of micro-i (μ) of about 2300. In some examples, the ferrite may have permeability of micro-i (μ) ranging from about 200 to about 5000. In some examples, different magnetic material may be used for the magnetic core.
• In some examples, thereceiver1230 may be configured to loosely inductively couple to a transmitter (e.g., atransmitter110 of base unit100). For example, the receivingcoil1232 may be configured to loosely inductively couple to a transmitting coil of the base unit. As will be further described below, the transmitting coil may include a magnetic core with windings. Similar materials may be used for the core and windings of the transmitting coil; however the receiving and transmitting coils may differ significantly in size, e.g., as illustrated inFIG. 7 and as will be further described. In some examples, the receiving coil may be configured to receive power from the transmitting coil regardless of relative orientation between the receiving and transmitting coils. Generally, a transmitting coil of a base unit according to the examples herein may utilize a magnetic core, which may in some examples shape the field provided by the transmitting coil, as the field lines may preferentially go through the magnetic core and in this manner a partially guided flux may be used where a portion of the flux is guided by the magnetic core. In some examples, the receivingcoil1232 of the electronic device may be configured to resonantly inductively couple to the transmitting coil.
• In some examples, thememory1240 of the camera may store processor-executable instructions for performing functions of the camera described herein. In such examples, a micro-processor may be operatively coupled to the memory and configured to execute the processor-executable instruction to cause the camera to perform functions, such as cause power to be selectively received upon detection of the wireless power receiver in proximity, cause images to be captured upon receiving an image capture command, and/or cause images to be stored in the memory. In some examples, thememory1240 may be configured to store user data including image data (e.g., images captured with the camera1200). In some examples, the user data may include configuration parameters. Although certain electronic components, such as thememory1240 and processor1252 are discussed in the singular, it will be understood that the camera may include any number of memory devices and any number of processors and other appropriately configured electronic components.
• Thememory1240 and processor1252 may be connected to a main circuit board1260 (e.g., main PCB). Themain circuit board1260 may support one or more additional components, such as a wireless communication device (e.g., a Wi-Fi or Bluetooth chip), microphone and associatedcircuitry1268, and others. In some examples, one or more of these components may be supported by separate circuit boards (e.g., auxiliary board1264) operatively coupled to themain circuit board1260. In some examples, some of the functionality of the camera may be incorporated in a plurality of separate IC chips or integrated into a single processing unit.
• The electronic components ofcamera1200 may be packaged in ahousing1280, which may be made from a variety of rigid plastic materials known in the consumer electronics industry. In some examples, a thickness of thecamera housing1280 may range from about 0.3 mm to about 1 mm. In some examples, the thickness may be about 0.5 mm. In some examples, the thickness may exceed 1 mm. A camera according to the present disclosure may be a miniaturized self-contained electronic device, e.g., a miniaturized point-and-shoot camera. Thecamera1200 may have a length of about 8 mm to about 50 mm. In some examples, thecamera1200 may have a length from about 12 mm to about 42 mm. In some examples, thecamera1200 may have a length not exceeding 42 mm. In some examples thecamera1200 may be about 12 mm long. Thecamera1200 may have a width of about 8 mm to about 12 mm. In some examples, thecamera1200 may be about 9 mm wide. In some example, thecamera1200 may have a width not exceeding about 10 mm. In some example, thecamera1200 may have a height of about 8 mm to about 15 mm. In some examples, thecamera1200 may be about 9 mm high. In some examples, thecamera1200 may have a height not exceeding about 14 mm. In some examples, thecamera1200 may weigh from about 5 grams to about 10 grams. In some examples thecamera1200 may weigh be about 7 grams or less. In some examples, thecamera1200 may have a volume of about 6,000 cubic millimeters or less. In some examples, thecamera1200 may be a waterproof camera. In some examples, the camera may include a compliant material, e.g., forming or coating at least a portion of an exterior surface of thecamera1200. This may provide functionality (e.g., accessibility to buttons through a waterproof enclosure) and/or comfort to the user.
• The electronic components may be connected to the one or more circuit boards (e.g.,main PCB1260, auxiliary circuit board1264) and electrical connection between the boards and/or components thereon may be formed using known techniques. In some examples, circuitry may be provided on a flexible circuit board, or a shaped circuit board, such as to optimize the use of space and enable packaging of the camera within a small form factor. For example, a moldedinterconnect device1266 may be used to provide connectivity between one or more electronic components on the one or more boards. The electronic components may be stacked and/or arranged within the housing for optimal fit within a miniaturized enclosure. For example, themain circuit board1260 may be provided adjacent another component (e.g., the battery1220) and attached thereto via anadhesive layer1265. In some examples, the main PCB may support IC chips on both sides of the board in which case the adhesive layer may attach to packaging of the IC chips, a surface of a spacing structure provided on the main PCB and/or a surface of the main PCB. In other examples, the main PCB and other circuit boards may be attached via other conventional mechanical means, such as fasteners.
• In some examples, thecamera1200 may be waterproof. Thehousing1280 may provide a waterproof enclosure for the internal electronics (e.g., theimage capture device1210,battery1220,receiver1230, and circuitry). After the internal components are assembled into thehousing1280, acover1282 may be irremovably attached, such as via gluing or laser welding, for example. In the illustrated example, thecover1282 is provided on theback side1289 of the camera. In other examples, the cover may be located elsewhere, such as along thebase1283 orsidewall1287 of the camera. In some examples, thecover1282 may be removable (e.g., for replacement of the battery and/or servicing of the internal electronics) and may include one or more seals.
• In some examples, thehousing1280 may include one or more openings for optically and/or acoustically coupling internal components to the ambience. In some examples, the camera may include afirst opening1284 on afront side1281 of thecamera1200. An optically transparent (or nearly optically transparent) material1285 may be provided across thefirst opening1284 thereby defining acamera window1231 for theimage capture device1210. Thecamera window1231 may be sealingly integrated with thehousing1280, for example by an overmolding process in which the opticallytransparent material1285 is overmolded with the plastic material forming thehousing1280. Theimage capture device1210 may be positioned behind thecamera window1231 with thelens1214 of theimage capture device1210 facing forward through the opticallytransparent material1285. In some examples, an alignment or orientation of theimage capture device1210 may be adjustable.
• Asecond opening1286 may be provided along asidewall1287 of thehousing1280. Thesecond opening1286 may be arranged to acoustically couple themicrophone1268 with the ambience. A substantially acousticallytransparent material1288 may be provided across thesecond opening1286 to serve as a microphone protector plug1233 (e.g., to protect the microphone from being soiled or damaged by water or debris) without substantially interfering with the operation of the microphone. The acousticallytransparent material1288 may be configured to prevent or reduce water ingress through thesecond opening1286. For example, the acousticallytransparent material1288 may comprise a water impermeable mesh. The mesh may be a micro-mesh sized with a mesh density selected to prevent water from passing through the mesh. In some examples, the mesh may include (e.g., formed of, or coated with) an hydrophobic material.
• Themicrophone1268 may be configured to detect sounds, such as audible commands, which may be used to control certain operations of thecamera1200. In some examples, thecamera1200 may be configured to capture an image responsive to an audible command. In some examples, the audible command may be a spoken word or it may be a. non-speech sound such as the click of teeth, the click of a tongue, or smack of lips. Thecamera1200 may detect the audible command (e.g., in the form of an audible sound) and perform an action, such as capture an image, transfer data., or others.
• In some examples, thecamera1200 may be configured to transfer data wirelessly to another electronic device, for example a base unit of the wireless power transfer system. For example, thecamera1200 may transfer images captured by the image capture device for processing and/or storage elsewhere such as on the base unit and/or another computing device (e.g., personal computer, laptop, mobile phone, tablet, or a remote storage device such as cloud storage). Images captured with thecamera1200 may be processed (e.g., batch processed) by the other computing device, as will be further described. Data may be transferred from thecamera1200 to the other electronic device (e.g., base unit, a personal computing device, the cloud) via a separate wireless communication device e.g., Wi-Fi or Bluetooth enabled device) or via the receiver/transmitter of thecamera1200, which in such instances would be configured to also transmit signals in addition to receiving signals (e.g., power signals). In other words, in some examples, thereceiver1230 may in some examples be also configured as a transmitter such that thereceiver1230 is operable in transmit mode as well as receive mode. In other examples, a separate transmitter (e.g., separate transmitting coil that includes a magnetic core and conductive windings) may alternatively or additionally be provided.
• Thecamera1200 may be a wearable camera. In this regard thecamera1200 may be configured to be attached to a wearable article, such as eyewear (e.g., as shown inFIG. 11). In some examples, the camera may be removably attached to a wearable article. That is, the camera may be attachable to the wearable article (e.g., eyewear), detachable from the wearable article (e.g., eyewear), and may be further configured to be movable on the wearable article while attached thereto. In some examples, the wearable article may be any article worn by a user, such as by way of example only, a ring, a band (e.g., armband, wrist band, etc.), a bracelet, a necklace, a hat or other headgear, a belt, a purse strap, a holster, or others. The term eyewear includes all types of eyewear, including and without limitation eyeglasses, safety and sports eyewear such as goggles, or any other type of aesthetic, prescription, or safety eyewear. In some examples, thecamera1200 may be configured to be movably attached to a wearable article, such as eyewear, for example via aguide1290 configured to engage a corresponding guide on the eyewear, e.g.,track6 inFIG. 6. Theguide1290 on the camera may be configured to slidably engage the guide on the eyewear. In some examples, the guide on the eyewear may be provided on the eyewear frame, e.g., on a temple of the eyewear. Thecamera1200 may be configured to be attachable, detachable, and re-attachable to the eyewear frame. In some examples, theguide1290 may be configured for magnetically attaching thecamera1200 to the eyewear. In this regard, one or more magnets may be embedded in theguide1290. Theguide1290 may be provided along a bottom side1283 (also referred to as a base1283) of thecamera1200. Theguide1290 may be implemented as a protrusion (also referred to as male rail or simply rail) which is configured for a cooperating sliding fit with a groove (also referred to as female track or simply track) on the eyewear. The one or more magnets may be provided on the protrusion or at other location(s) along thebase1283. The eyewear may include a metallic material (e.g., along a temple of the eyewear) for magnetically attracting the one or more magnets on the camera. The camera may be configured to couple to the eyewear in accordance with any of the examples described in U.S. patent application Ser. No. 14/816,995, filed Aug. 3, 2015, and titled “Wearable Camera Systems and Apparatus and Method for Attaching Camera Systems or Other Electronic Device to Wearable Article,” which application is incorporated herein in its entirety for any purpose.
• As described, thecamera1200 may be configured to receive power wirelessly, e.g., from a base unit of a wireless power system. An example of a wireless power transfer system is illustrated and described further with reference toFIGS. 5-11.
• FIG. 5 shows a block diagram of a system for wirelessly powering one or more electronic devices according to some examples of the present disclosure. Thesystem10 includes abase unit100 and one or moreelectronic devices200. Thebase unit100 is configured to wirelessly provide power to one or more of theelectronic devices200, which may be separated from the base unit by a distance. Thebase unit100 is configured to provide power wirelessly to anelectronic device200 while the electronic device remains within a threshold distance (e.g., a charging range or charging zone106) of thebase unit100. Thebase unit100 may be configured to selectively transmit power wirelessly to any number of electronic devices (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 although a greater number than 10 devices may be charged in some examples) detected to be within a proximity (e.g., within the charging range) of thebase unit100. Although theelectronic device200 may typically be charged (e.g., coupled to the base unit for charging) while being distance-separated from thebase unit100, it is envisioned and within the scope of this disclosure that thebase unit100 may operate to provide power wirelessly to anelectronic device200 when theelectronic device200 is adjacent to or in contact with thebase unit100,
• Thebase unit100 includes atransmitter110, abattery120, and acontroller130. Thetransmitter110 includes at least one transmitting coil112 (interchangeably referred to as Tx coil). The transmittingcoil112 may include a magnetic core with conductive windings. The windings may include copper wire (also referred to as copper windings). In some examples, the copper wire may be monolithic copper wire (e.g., single-strand wire). In some examples, the copper wire may be multi-strand copper wire (e.g., Litz wire), which may reduce resistivity due to skin effect in some examples, which may allow for higher transmit power because resistive losses may be lower. In some examples, the magnetic core may be a ferrite core (interchangeably referred to as ferrite rod). The ferrite core may comprise a medium permeability ferrite, for example 78 material supplied by Fair-Rite Corporation. In some examples, the ferrite core may comprise a high permeability material, such as Vitroperm 500F supplied by Vacuumschmelze in Germany. Ferrite cores comprising other ferrite materials may be used. In some examples, the ferrite may have a medium permeability of micro-i ( μ) of about 2300. In some examples, the ferrite may have permeability of micro-i (μ) ranging from about 200 to about 5000. In some examples, different magnetic material may be used for the magnetic core. Generally, transmitting coils described herein may utilize magnetic cores which may in some examples shape the field provided by the transmitting coil, as the field lines preferentially go through the magnetic core, in this manner, partially guided flux may be used where a portion of the flux is guided by the magnetic core.
• The transmittingcoil112 is configured to inductively couple to a receivingcoil212 in theelectronic device200. In some examples, thetransmitter110 may be additionally configured as a receiver and may thus be interchangeably referred to as transmitter/receiver. For example, the transmitting coil of the transmitter/receiver may additionally be configured as a receiving coil. In some examples, the transmitter/receiver may additionally include a receiving coil. In yet further examples, the base unit may include aseparate receiver140 comprising a receiving coil. The transmitter/receiver or separate receiver of the base unit may be configured to wirelessly receive power (102) and/or data (104) as will be further described below.
• In some examples, thetransmitter110 may include asingle transmitting coil112. The transmittingcoil112 may be placed in an optimal location and/or orientation to provide anoptimum charging zone106. In some examples, the transmitting coil may be placed in a location within the base unit selected to provide a large number of charging opportunities during a typical use of the device. For example, the transmittingcoil112 may be placed near a side of the base unit which most frequently comes in proximity to an electronic device (e.g., a top side of a base unit implemented as a mobile phone case as illustrated in the example inFIG. 9).
• In some examples, thetransmitter110 includes a plurality of transmittingcoils112. The transmitting coils112 may be arranged in virtually any pattern. For example, the base unit may include a pair of coils which are angled to one another. In some examples, the coils may be arranged at angles smaller than 90 degrees, for example ranging between 15-75 degrees. In some examples, the coils may be arranged at 45 degrees relative to one another. Other combinations and arrangements may be used, examples of some of which will be further described below.
• In some examples, the transmitting coils may be arranged to provide a nearly omnidirectional charging zone106 (also referred to as charging sphere or hotspot). The chargingzone106 of the base unit may be defined by a three dimensional space around the base unit which extends a threshold distance from the base unit in all three directions (e.g., the x, y, and z directions). Although a three dimensions (3D) space corresponding to a charging range of the base unit may be referred to herein as a sphere, it will be understood that the three dimensions (3D) space corresponding to a charging range need not be strictly spherical in shape. In some examples, the charging sphere may be an ellipsoid or a different shape.
• Efficiency of wireless power transfer within the chargingzone106 may be variable, for example, depending on a particular combination of transmitting and receiving coils and/or a particular arrangement of the coils or relative arrangements of the coils in the base unit and electronic device(s). The one or more transmitting coils112 may be arranged within a housing of the base unit in a manner which improves the omni-directionality of the chargingzone106 and/or improves the efficiency of power transmission within thezone106. In some examples, one or more transmitting coils112 may be arranged within the housing in a manner which increases the opportunities for charging during typical use of the base unit. For example, the transmitting coil(s) may extend, at least partially, along one or more sides of the base unit which are most brought near an electronic device (e.g., the top or sides of a mobile phone case base unit which may frequently be moved in proximity with a wearable electronic device such as eyewear camera or a digital wrist watch). In some examples, the base unit may be placed on a surface (e.g., a table or desk) during typical use and electronic devices may be placed around the base unit. In such examples, the transmitting coil(s) may be arranged along a perimeter of the base unit housing.
• In some examples, the base unit may be attached to a mobile phone via an attachment mechanism such as adhesive attachment, an elastic attachment, a spring clamp, suction cup(s), mechanical pressure, or others. In some examples, the base unit may be enclosed or embedded in an enclosure (also referred to as housing), which may have a generally planar shape (e.g., a rectangular plate). An attachment mechanism may be coupled to the housing such that the base unit may be removably attached to a mobile phone, a table, or other communication device. In an example, the attachment mechanism may be a biasing member, such as a clip, which is configured to bias the mobile phone towards the base unit in the form of, by way of example only, a rectangular plate. For example, a clip may be provided proximate a side of the base unit and the base unit may be attached to (e.g., clipped to) the mobile phone via the clip in a manner similar to attaching paper or a notebook/notepad to a clip board. In some examples, the base unit may be adhesively or elastically attached to the communication device and/or to a case of the communication device.
• In further examples, the base unit may be separate from the communication device. In yet further examples, the base unit may be incorporated into (e.g., integrated into) the communication device. For example, thetransmitter110 may be integrated with other components of a typical mobile phone. Thecontroller130 may be a separate IC in the mobile phone or its functionality may be incorporated into the processor and/or other circuitry of the mobile phone. Typical mobile phones include a rechargeable battery which may also function as thebattery120 of the base unit. In this manner, a mobile phone may be configured to provide power wirelessly to electronic devices, such as separated electronic wearable devices.
• As previously noted, thebase unit100 may include abattery120. Thebattery120 may be a rechargeable battery, such as a Nickel-Metal Hydride (NiMH), a Lithium ion (Li-ion), or a Lithium ion polymer (Li-ion polymer) battery. Thebattery120 of thebase unit100 may include larger amount of energy capacity as compared to a battery of theelectronic device200. That is, thebattery120 may store more power, and in some examples, significantly more power than a battery onboard the electronic device (e.g., thebattery1220 of wearable camera1200). The electronic device, which may be a wearable device, may have a significantly smaller form factor than thebase unit100 and accordingly, may be able to accommodate a much smaller battery. Periodic wireless transfer of power from the base unit to the electronic device (e.g., when the electronic device is within the charging range of the base unit) may enable a small form factor suitable for a wearable electronic device without significant sacrifice in performance. Thebattery120 may be coupled to other components to receive power. For example, thebattery120 may be coupled to anenergy generator150. Theenergy generator150 may include an energy harvesting device which may provide harvested energy to the battery for storage and use in charging the electronic device(s). Energy harvesting devices may include, but not be limited to, kinetic-energy harvesting devices, solar cells, thermoelectric generators, or radio-frequency harvesting devices. In some examples, thebattery120 may be coupled to an input/output connector180 such as a universal serial bus (USB) port. It will be understood that the term USB port herein includes any type of USB interface currently known or later developed, for example mini and micro USB type interfaces. Other types of connectors, currently known or later developed, may additionally or alternatively be used. The I/O connector180 (e.g., USB port) may be used to connect thebase unit100 to an external device, for example an external power source or a computing device (e.g., a personal computer, laptop, tablet, or a mobile phone).
• Thetransmitter110 is operatively coupled to thebattery120 to selectively receive power from the battery and wirelessly transmit the power to theelectronic device200. As described herein, in some examples, the transmitter may combine the functionality of transmitter and receiver. In such examples, the transmitter may also be configured to wirelessly receive power from an external power source. It will be understood that during transmission, power may be wirelessly broadcast by the transmitter and may be received by any receiving devices within proximity (e.g., within the broadcast distance of the transmitter).
• Thetransmitter110 may be weakly-coupled to a receiver in theelectronic device200 in some examples. There may not be a tight coupling between thetransmitter110 and the receiver in theelectronic device200. Highly resonant coupling may be considered tight coupling. The weak (or loose) coupling may allow for power transmission over a distance (e.g. from a base unit in or on a mobile phone to a wearable device on eyewear or from a base unit placed on a surface to a wearable device placed on the surface in a neighborhood of, but not on, the base unit). So, for example, thetransmitter110 may be distance separated from the receiver. The distance may be greater than 1 mm in some examples, greater than 10 mm in some examples, greater than 100 mm in some examples, and greater than 1000 mm in some examples. Other distances may be used in other examples, and power may be transferred over these distances.
• Thetransmitter110 and the receiver in theelectronic device200 may include impedance matching circuits each having an inductance, capacitance, and resistance. The impedance matching circuits may function to adjust impedance of thetransmitter110 to better match impedance of a receiver under normal expected loads, although in examples described herein the transmitter and receiver may have transmit and receive coils, respectively, with different sizes and/or other characteristics such that the impedance of the receiver and transmitter may not be matched by the impedance matching circuits, but the impedance matching circuits may reduce a difference in impedance of the transmitter and receiver. Thetransmitter110 may generally provide a wireless power signal which may be provided at a body-safe frequency, e.g. less than 500 kHz in some examples, less than 300 kHz in some examples, less than 200 kHz in some examples, 125 kHz in some examples, less than 100 kHz in some examples, although other frequencies may be used.
• Transmission/broadcasting of power may be selective in that a controller controls when power is being broadcast. The base unit may include acontroller130 coupled to thebattery120 andtransmitter110. Thecontroller130 may be configured to cause thetransmitter110 to selectively transmit power, as will be further described. A charger circuit may be connected to thebattery120 to protect the battery from overcharging. The charger circuit may monitor a level of charge in thebattery120 and turn off charging when it detects that thebattery120 is fully charged. The functionality of the charger circuit may, in some examples, be incorporated within thecontroller130 or it may be a separated circuit (e.g., separate IC chip).
• In some examples, the base unit may include amemory160. Thememory160 may be coupled to thetransmitter110 and/or any additional transmitters and/or receivers (e.g., receiver140) for storage of data transmitted to and from thebase unit100. For example, thebase unit100 may be configured to communicate data wirelessly to and from theelectronic device200, e.g., receive images acquired with an electronic device in the form of a wearable camera, or transmit executable instructions, configuration data, or other data to the electronic device. Thebase unit100 may include larger amount of memory as compared to theelectronic device200. That is, thememory160 may be configured to store more data, and in some examples, significantly more data than a memory device onboard the electronic device (e.g., thememory1240 of wearable camera1200). The electronic device, which may be a wearable device, may have a significantly smaller form factor than the base unit and accordingly, may be able to accommodate a much smaller memory device. Periodic wireless transfer of data from the electronic device to the base unit (e.g., when the electronic device is within range of the base unit such as during charging) may enable a small form factor suitable for a wearable electronic device without significant sacrifice in performance. The base unit may include one ormore sensors170, which may be operatively coupled to the controller. Asensor170 may detect a status of the base unit such that the transmitter may provide power selectively and/or adjustably under control fromcontroller130.
• Theelectronic device200 may be configured to provide virtually any functionality, for example an electronic device configured as a camera (e.g., camera1200). In this regard, theelectronic device200 may include circuitry associated with wireless charging. For example, theelectronic device200 may include a receiving which may include at least one receivingcoil212. As described, the receivingcoil212 may be coupled to a rechargeable power cell onboard theelectronic device200. Frequent charging in a manner that is non-invasive or minimally invasive to the user during typical use of the electronic device may be achieved via wireless coupling between the receiving and transmitting coils in accordance with the examples herein. In some examples, the electronic device may be a wearable electronic device, which may interchangeably be referred to herein as electronic wearable devices (e.g., wearable camera). The electronic device may have a sufficiently small form factor to make it easily portable by a user. Theelectronic device200 may be attachable to clothing or an accessory worn by the user, for example eyewear. For example, theelectronic device200 may be attached to eyewear using a guide6 (e.g., track) incorporated in the eyewear, e.g., as illustrated inFIG. 6 (only a portion of eyewear, namely the temple, is illustrated so as not to clutter the drawing).FIG. 6 shows examples ofelectronic devices200 which may be configured to receive power wirelessly in accordance with the present disclosure. In some examples, theelectronic device200 may be a miniaturized camera system which may, in some examples, be attached to eyewear. In other examples, the electronic device may be any other type of an electronic system attached to eyewear, such as an image display system, an air quality sensor, a UV/HEV sensor, a pedometer, a night a blue tooth enabled communication device such as blue tooth headset, a hearing aid or an audio system. In some examples, the electronic device may be worn elsewhere on the body, for example around the wrist (e.g., an electronic watch or a biometric device, such as a pedometer). Theelectronic device200 may be another type of electronic device other than the specific examples illustrated. The electronic device200 may be virtually any miniaturized electronic device, for example and without limitation a camera, image capture device, IR camera, still camera, video camera, image sensor, repeater, resonator, sensor, sound amplifier, directional microphone, eyewear supporting an electronic component, spectrometer, directional microphone, microphone, camera system, infrared vision system, night vision aid, night light, illumination system, sensor, pedometer, wireless cell phone, mobile phone, wireless communication system, projector, laser, holographic device, holographic system, display, radio, GPS, data storage, memory storage, power source, speaker, fall detector, alertness monitor, geo-location, pulse detection, gaming, eye tracking, pupil monitoring, alarm, CO sensor, CO detector, CO2 sensor, CO2 detector, air particulate sensor, air particulate meter, UV sensor, UV meter, IR sensor IR meter, thermal sensor, thermal meter, poor air sensor, poor air monitor, bad breath sensor, bad breath monitor, alcohol sensor, alcohol monitor, motion sensor, motion monitor, thermometer, smoke sensor, smoke detector, pill reminder, audio playback device, audio recorder, speaker, acoustic amplification device, acoustic canceling device, hearing aid, assisted hearing assisted device, informational earbuds, smart earbuds, smart ear-wearables, video playback device, video recorder device, image sensor, fall detector, alertness sensor, alertness monitor, information alert monitor, health sensor, health monitor, fitness sensor, fitness monitor, physiology sensor, physiology monitor, mood sensor, mood monitor, stress monitor, pedometer, motion detector, geo-location, pulse detection, wireless communication device, gaming device, eyewear comprising an electronic component, augmented reality system, virtual reality system, eye tracking device, pupil sensor, pupil monitor, automated reminder, light, alarm, cell phone device, phone, mobile communication device, poor air quality alert device, sleep detector, doziness detector, alcohol detector, thermometer, refractive error measurement device, wave front measurement device, aberrometer, GPS system, smoke detector, pill reminder, speaker, kinetic energy source, microphone, projector, virtual keyboard, face recognition device, voice recognition device, sound recognition system, radioactive detector, radiation detector, radon detector, moisture detector, humidity detector, atmospheric pressure indicator, loudness indicator, noise indicator, acoustic sensor, range finder, laser system, topography sensor, motor, micro motor, nano motor, switch, battery, dynamo, thermal power source, fuel cell, solar cell, kinetic energy source, thermo electric power source, smart band, smart watch, smart earring, smart necklace, smart clothing, smart belt, smart ring, smart bra, smart shoes, smart footwear, smart gloves, smart hat, smart headwear, smart eyewear, and other such smart devices. In some examples, theelectronic device200 may be a smart device. In some examples, theelectronic device200 may be a micro wearable device or an implanted device.
• Theelectronic device200 may include a receiver e.g., Rx coil212) configured to inductively couple to the transmitter (e.g. Tx coil112) of thebase unit100. The receiver may be configured to automatically receive power from the base unit when the electronic device and thus the receiver is within proximity of the base unit (e.g., when the electronic device is a predetermined distance, or within a charging range, from the base unit). Theelectronic device200 may store excess power in a power cell onboard the electronic device. The power cell onboard the electronic device may be significantly smaller than the battery of the base unit. Frequent recharging of the power cell may be effected by virtue of the electronic device frequently coming within proximity of the base unit during normal use. For example, in the case of a wearable electronic device coupled to eyewear and a base unit in the form of a cell phone case, during normal use, the cell phone may be frequently brought to proximity of the user's head to conduct phone calls during which times recharging of the power cell onboard the wearable electronic device may be achieved. In some examples, in which the wearable electronic device comprises an electronic watch or biometric sensor coupled to a wrist band or an arm band, the wearable electronic device may be frequently recharged by virtue of the user reaching for their cellphone and the base unit in the form of a cell phone case coming within proximity to the wearable electronic device. In some examples, the electronic device may include an energy harvesting system.
• In some examples, theelectronic device200 may not include a battery and may instead be directly powered by wireless power received from thebase unit100. In some examples, theelectronic device200 may include a capacitor (e.g., a supercapacitor or an ultracapacitor) operatively coupled to theRx coil212.
• Typically in existing systems which apply wireless power transfer, transmitting and receiving coils may have the same or substantially the same coil ratios. However, given the smaller form factor of miniaturized electronic devices according to the present disclosure, such implementation may not be practical. In some examples herein, the receiving coil may be significantly smaller than the transmitting coils, e.g., as illustrated inFIG. 7. In some examples, theTx coil112 may have a dimension (e.g., a length of the wire forming thewindings116, a diameter of the wire forming thewindings116, a diameter of thecoil112, a number ofwindings116, a length of thecore117, a diameter of thecore117, a surface area of the core117) which is greater, for example twice or more, than a respective dimension of the Rx coil212 (e.g., a length of the wire forming thewindings216, a diameter of thecoil212, a number ofwindings216, a length of thecore217, a surface area of the core217). In some examples, a dimension of theTx coil112 may be two times or greater, five times or greater, 10 times or greater, 20 times or greater, or 50 times or greater than a respective dimension of theRx coil212. In some examples, a dimension of theTx coil112 may be up to 100 times a respective dimension of theRx coil212. For example, the receiving coil212 (Rx coil) may comprise conductive wire having wire diameter of about 0.2 mm. The wire may be a single strand wire. The Rx coil in this example may have a diameter of about 2.4 mm and a length of about 13 mm. The Rx coil may include a ferrite rod having a diameter of about 1.5 mm and a length of about 15 mm. The number of windings in the Rx coil may be, by way of example only, approximately130 windings. The transmitting coil112 (Tx coil) may comprise a conductive wire having a wire diameter of about 1.7 mm. The wire may be a multi-strand wire. The Tx coil in this example may have a diameter of about 14.5 mm and a length of about 67 mm. The Tx coil may include a ferrite rod having a diameter of about 8 mm and a length of about 68 mm. Approximately 74 windings may be used for the Tx coil. Other combinations may be used for the Tx and Rx coils in other examples, e.g., to optimize power transfer efficiency even at distances in excess of approximately 30 cm or more. In some examples, the transfer distance may exceed 12 inches. In some examples herein, the Tx and Rx coils may not be impedance matched, as may be typical in conventional wireless power transfer systems. Thus, in some examples, the Tx and Rx coils of the base unit and electronic device, respectively, may be referred to as being loosely-coupled. According to some examples, the base unit is configured for low Q factor wireless power transfer. For example, the base unit may be configured for wireless power transfer at Q factors less than 500 in some examples, less than 250 in some examples, less than 100 in some examples, less than 80 in some examples, less than 60 in some examples, and other Q factors may be used. While impedance matching is not required, examples in which the coils are at least partially impedance matched are also envisioned and within the scope of this disclosure. While the Tx and Rx coils in wireless powers transfer systems described herein may be typically loosely coupled, the present disclosure does not exclude examples in which the Tx and Rx coils are impedance matched,
• The receiving coil (e.g., Rx coil212) may include conductive windings, for example copper windings. Conductive materials other than copper may be used. In some examples, the windings may include monolithic (e.g., single-strand) or multi-strand wire. In some examples, the core may be a magnetic core which includes a magnetic material such as ferrite. The core may be shaped in the form of a rod. The Rx coil may have a dimension that is smaller than a dimension of the Tx coil, for example a diameter, a length, a surface area, and/or a mass of the core (e.g., rod) may be smaller than a diameter, a length, a surface area, and/or a mass of the core (e.g., rod) of the Tx coil. In some examples, the magnetic core (e.g., ferrite rod) of the Tx coil may have a surface area that is two times greater or more than a surface area of the magnetic core (e.g., ferrite rod) of the Rx coil. In some examples, the Tx coil may include a larger number of windings and/or a greater length of wire in the windings When unwound than the number or length of wire of the windings of the Rx coil. In some examples, the length of unwound wire of the Tx coil may be at least two times the length of unwound wire of the Rx coil.
• In some examples, anRx coil212 may have a length from about 10 mm to about 90 mm and a radius from about 1 mm to about 15 mm. In one example, the performance of anRx coil212 having aferrite rod 20 mm in length and 2.5 mm in diameter with150 conductive windings wound thereupon was simulated with aTx coil112 configured to broadcast power at frequency of about 125 KHz. TheTx coil112 included a ferrite rod having a length of approximately 67.5 mm and a diameter of approximately 1.2 mm. Up to 20% transmission efficiency was obtained in the aligned orientation at distances of up to 200 mm between the coils. Sonic improvement was observed in the performance when the coils were arranged in a parallel orientation, in which the Rx coil continued to receive transmitted power until a. distance of about 300 mm. Examples of a wireless energy transfer system according to the present disclosure were compared with efficiency achievable by a system configured in accordance with the Qi 1.0 standard. The size of the Tx coil in one simulated system was 52 mm×52 mm×5.6 mm and a size of one Rx coil simulated was 48.2 mm×32.2 mm×1.1 mm, and load impedance was 1 KOhm.
• Referring now also toFIGS. 8-9, abase unit300, which may be incorporated in a mobile phone case form factor as shown in FIGS,9A and9B, will be described. Thebase unit300 may include some or all of the components ofbase unit100 described above with reference toFIG. 5. For example, thebase unit300 may include a transmitting coil312 (also referred to as Tx coil). The transmittingcoil312 is coupled to anelectronics package305, which includes circuitry configured to perform the functions of a base unit in accordance with the present disclosure, including selectively and/or adjustably providing wireless power to one or more electronic devices. In some examples, the electronic device may be an electronic device which is separated from the base unit (e.g., camera1200). In some examples, the electronic device may be themobile phone20, to which thebase unit300 in the form of a case is attached.
• Thebase unit300 may provide a mobile wireless hotspot (e.g., charging sphere106) for wirelessly charging electronic devices that are placed or come into proximity of the base unit (e.g., within the charging sphere). As will be appreciated, thebase unit300 when implemented in the form of a mobile phone case may be attached to a mobile phone and carried by the user, thus making the hotspot of wireless power mobile and available to electronic devices wherever the user goes. In examples, the base unit may be integrated with the mobile phone. The hotspot of wireless power by virtue of being connected to the user's mobile phone, which the user often or always carries with him or her, thus advantageously travels with the user. As will be further appreciated, opportunities for recharging the power cell on an electronic device worn by the user are frequent during the normal use of the mobile phone, which by virtue of being use may frequently be brought into the vicinity of wearable devices (e.g., eyewear devices when the user is making phone calls, wrist worn devices when the user is browsing or using other function of the mobile phone).
• TheTx coil312 and electronics (e.g., electronics package305) may be enclosed in ahousing315. Thehousing315 may have a portable form factor. In this example, the housing is implemented in the form of an attachment member configured to be attached to a communication device such as a mobile phone (e.g., a mobile phone, a cellular phone, a smart phone, a two-way radio, a walkie-talkie, and the like), a tablet or the like. In this regard, thehousing315 of the base unit may be implemented as a mobile phone/tablet case or cover. Thehousing315 may include features for mechanically engaging the communication device (e.g., mobile phone20). In further examples, the housing of the base unit may be implemented as an attachment member adapted to be attached to an accessory, such as a handbag, a belt, or others. Other form factors may be used. Thebase unit300 may power an electronic device other than the communication device to which it is connected, for example thecamera1200.
• In the examples inFIGS. 8 and 9, thebase unit300 includes a transmittingcoil312. The transmittingcoil312 includes amagnetic core317 withconductive windings316. Thecore317 may be made of a ferromagnetic material (e.g., ferrite), a magnetic metal, or alloys or combinations thereof, collectively referred to herein as magnetic material. For example, a magnetic material such as ferrite and various alloys of iron and nickel may be used. Thecoil312 includesconductive windings316 provided around thecore317. It will be understood in the context of this disclosure that thewindings316 may be, but need not be, provided directly on thecore317. In other words, thewindings316 may be spaced from the core material which may be placed within a space defined by thewindings316. In some examples, improved performance may be achieved by the windings being wound directly onto the core as in the present example.
• Thecore317 may be shaped as an elongate member and may have virtually any cross section, e.g., rectangular or circular cross section. An elongate core may interchangeably be referred to as arod314, e.g., a cylindrical or rectangular rod. The term rod may be used to refer to an elongate core in accordance with the present application, regardless of the particular cross sectional shape of the core. The core may include a single rod or any number of discrete rods (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10 or any other number greater than 10) arranged in patterns as will be described. In the examples inFIGS. 8 and 9, without limitation, the transmitting coil comprises a single cylindrical rod positioned at least partially along a first side (e.g., top side321) of thehousing315. In other examples, one or more coils may alternatively or additionally be positioned along other sides, e.g., abottom side323, theleft side325 and/orright sides327 of thehousing315.
• The electronics package305 (interchangeably referred to as electronics or circuitry) may be embedded in thehousing315 or provided behind acover307. In some examples, thecover307 may be removable. In some examples, it may be advantageous to replace thebattery320. In such examples, thebattery320 may be a separable component from the remaining circuitry. Thebattery320 may be accessed by removing thecover307. In some examples, theelectronics package305 may include a battery for storing energy from an external power source. In some examples, thebase unit300 may alternatively or additionally receive power from the mobile phone when powering the distance separated electronic device. In some examples, the base unit may not require a battery, and even smaller form factors may thus be achieved.
• The base unit may be provided with one or more I/O devices380. I/O devices may be used to receive and/or transmit power and/or data via a wired connection between the base unit and another device. For example, the base unit may include an I/O device380 in the form of a USB connector. The I/O device380 (e.g., USB connector) may include a first connection side382 (e.g., a female port) for coupling the base unit to external devices (e.g., a power source such as the power grid and/or another electronic device). The I/O device380 may include a second connection side384 (e.g., a male connector) for coupling the base unit to the mobile phone, e.g., via a USB port of the mobile phone. One or more of thesignal lines385 of the I/O device may be coupled to power, ground, and/or data lines in the base unit circuitry. For example, if a USB connector with 5 lines is used, 2 lines may be used for data, 2 lines may be used for power, and 1 line may be coupled to ground or used for redundancy. The signal lines385 of the first and second connection sides may be coupled to the base unit circuitry via a connector circuit386 (e.g., USB chip). It will be understood that any other type of connectors may be used, for example, and without limitation, an APPLE Lightning connector.
• Thebase unit300 may include acontroller330. Thecontroller330 may include functionality for controlling operations of thebase unit300, for example controlling detection of electronic devices (e.g., a camera1200) within proximity, selective transmission of wireless power upon detection of an electronic device, determination of status of the base unit, and selection of transmission mode depending on the status of the base unit. These functions may be implemented in computer readable media or hardwired into an ASIC or other processing hardware. Thecontroller330 may interchangeably be referred to as base unit processor.
• The base unit may include one ormore memory devices360. The base unit may include volatile memory362 (e.g., RAM) and non-volatile memory364 (e.g., EEPROM, flash or other persistent electronic storage). The base unit may be configured to receive data (e.g. user data, configuration data) through wired or wireless connection with external electronic devices and may store the data on board the base unit (e.g., in one or more of the memory devices360). The base unit may be configured to transmit data stored onboard the base unit to external electronic devices as may be desired. In addition to user data, the memory devices may store executable instructions which, when executed by a processor (e.g., processor360), cause the base unit to perform functions described herein.
• Thebase unit300 may include acharger circuit332, which may be configured to protect thebattery320 from overcharging. The charger circuit may be a separate chip or may be integrated within thecontroller330. The base unit may include a separate transmitter/receiver circuitry340 in addition to theTx coil312 used for wireless power transmission. The transmitter/receiver circuitry340 may include a receiving/transmittingcoil342, e.g., an RF coil. The transmitter/receiver circuitry340 may further includedriver circuitry344 for transmission (e.g., RF driver circuit) and sense circuitry346 for reception of signals (e.g., RF sensing circuit). Thebase unit300 may include additional circuitry for wireless communication (e.g., communication circuit388). Thecommunication circuit388 may include circuitry configured for Bluetooth or WiFi communication. In some examples, thebase unit300 may include one or more sensor370 and/or one ormore energy generators350 as described herein. Additional circuitry providing additional functionality may be included. For example, thebase unit300 may include an image processor for processing and/or enhancement of images received from a wearable camera (e.g., eyewear camera). The image processing functionality may be provided in a separate IC (e.g., a DaVinci chip set) or it may be incorporated in a processor which implements the functions ofcontroller330.
• In some examples, the housing may be configured to be mechanically coupled to a communication device, such as a mobile phone. For example, thehousing315 may be configured to provide the functionality of a mobile phone case. Thehousing315 may have a shape corresponding to a shape of a communication device (e.g., a mobile phone). For example, thehousing315 may be generally rectangular in shape and may be sized to receive, at least partially, or enclose, at least partially, the communication device. In some examples, thehousing315 may be configured to cover only one side of the communication device. In some examples, thehousing315 may cover at least partially two or more sides of the communication device. Thehousing315 may include areceptacle309 configured to receive and/or retain the mobile phone at least partially therein. Thereceptacle309 may be on a front side of thehousing315. The base unit electronics may be provided proximate an opposite side of the receptacle. The coils may be placed around the perimeter of the housing, e.g. along any of the top, bottom, or left and right sides.
• In some examples, the transmitter includes a plurality of discrete Tx coils (for example 2, 3, 4, 5, 6, 7, 8, 9 or 10 coils), each having a magnetic core with conductive windings wound thereon. At least some of the Tx coils may be at an angle to one another, for example at 20 degrees or more, 30 degrees or more, 45 degrees or more, 75 degrees or more relative to one another. In some examples, the Tx coils may be generally perpendicular to one another. In some examples, two or more Tx coils may be generally parallel to one another. In some examples, two or more Tx coils may be disposed along a same edge of the housing. A diameter ø of the Tx coils may range from about 5 mm to about 20 mm. In some examples, the diameter ø of the Tx coils may be between 8 mm to 15 mm. In some examples, the diameter ø of the Tx coils may be 9 mm, 1.0 mm, 11 mm, 12 mm, 13 mm, or 14 mm. Different diameters for the coils may be used. In some examples, the magnetic core may be an elongate cylindrical rod made from a magnetic material. In some examples, the rods may be arranged around the perimeter of the base unit's housing. In some examples, the rods may extend substantially along the full length of a top side, bottom side, left and/or right sides of the housing. Lengths (l), widths (w), and thicknesses (t) of the housing may vary depending on dimensions of the communication device, which the housing is configured to attach to. In some examples, the housing may range from about 150 mm-180 mm, 80-95 mm, and 15-25 mm, respectively. Other lengths, widths, and thicknesses may be used, e.g., to accommodate a given communication device (e.g. smartphone) and/or accommodate a particular coil size. In some examples, the housing may be configured to attach to an IPHONE brand mobile phone or a SAMSUNG brand mobile phone. For example, a housing configured to attach to anIPHONE 6 mobile phone may be about 160 mm long, about 84 mm wide, and about 19 mm thick and accommodate Tx coils having a diameter of about 9 mm. In another example, the housing may have a length of about 165 mm, a width of about 94 mm, and a thickness of about 21 mm accommodating a coil having a diameter of about 14 mm. In some examples, the housing may be configured to attach to an IPAD brand tablet or a SAMSUNG brand tablet. In some examples, the housing may be configured to engage one, two, three and/or all of the perimeter sides of the communication device. In some examples, the base unit housing may be configured to cover or partially cover one or more of the communication devices' major sides (e.g., the display side or the back side) of the communication device.
• FIG. 10 shows a flow diagram of a process in accordance with the present disclosure. Theprocess1000 may include placing a base unit (e.g., base unit100) proximate a camera (e.g., camera1200), as show inblock1005. The camera may be a wearable camera, which may be attached toeyewear4, for example via a guide on the camera engaging a track on theeyewear4, as illustrated inFIG. 11. The base unit (e.g., base unit100) may be attached to a communication device, such as a mobile phone. The base unit may include a transmitting coil configured to inductively couple with a receiving coil in the camera to wirelessly transmit power to the wearable camera. Theprocess1000 may further include detecting the wearable camera with the base unit. For example, the base unit may detect a proximity signal of the camera, as shown inblock1010. In some examples, the base unit may alternatively or additionally detect a charge status signal of the camera, as further shown inblock1010. The charge status signal may be indicative of a charge status of the camera's power cell (e.g.,battery1220 of camera1200). Theprocess1000 may also include wirelessly transmitting power from the base unit to the camera, as shown inblock1015. The wireless transfer of power may continue while the camera remains within a charging range of the base unit (e.g., based on a detected proximity signal) or until a charge state signal of the camera corresponds to a fully charged state of the camera. In some examples, the base unit may be configured to broadcast wireless power only if a charge status of an electronic device in proximity indicates a less than full charge of the electronic device's onboard battery. To that end, the base unit may monitor the proximity and/or charge status of the camera, as shown inblock1020.
• In some examples, the camera may be configured to selectively receive power. In other words, circuitry associated with wireless power charging may be selectively activated responsive to an indication of proximity of an appropriately tuned wireless power transmitter. The base unit may be configured to broadcast power and the camera may be configured to receive power broadcast at body-safe levels. The base unit may be configured to broadcast power and the camera may be configured to receive power broadcast at a frequency within the range of 50 kHz or 500 kHz. The camera may broadcast a signal (e.g., proximity signal, charge status signal), which may be detected by the base unit. Upon detecting of the camera in proximity the base unit may begin broadcasting power signals and the camera may activate circuitry associated with wireless power reception (e.g., a charging circuit of the camera). In some examples, the camera may broadcast a signal (e.g., proximity signal, charge status signal) responsive to an interrogation signal from the base unit and the base unit may automatically detect the broadcast signal from the camera and/or automatically initiate power transmission upon the detection of the signal from the camera.
• In some examples, theprocess1000 may include capturing an image with the camera and/or transfer data (e.g., images) wirelessly, as shown inblock1025. Images may be captured responsive to a command, which may be generated responsive to manual user input (e.g., via a trigger button on the camera). In some examples, images may be captured responsive to a command generated by the controller responsive to an audible command detected by the camera. For example, the camera may include a microphone (e.g., microphone1268), which is configured to detect an audible command, which may include a voice command or other speech or non-speech sounds (a click of the user's teeth). The camera may be configured to capture images while receiving wireless power, e.g., as shown inblock1030. Captured images may be stored onboard the camera (e.g., in a memory1240) or transferred to another electronic device, such as the base unit or acomputer system1410. Images or other data may be transferred wirelessly from the camera to the base unit or to another computing device (e.g.,computer system1410 inFIG. 14) automatically or responsive to user input. To that end, the camera may include wireless communication devices (e.g., Bluetooth, or the like). In some examples, the wireless receiver of the camera e.g., receiver1230) may also be configured as a transmitter operable to transmit data (e.g., images) from the camera to the base unit or another computing device.
• Referring now also toFIGS. 12-13, additional features of cameras in accordance with the present disclosure will be described. As described, thecamera1200′,1200″ may be a wearable camera and may include aguide1290. Theguide1290 may include one ormore magnets1292 for magnetically attaching the camera to the eyewear. The one or more magnets may be embedded in theguide1290. Theguide1290 may be provided along a bottom side1283 (also referred to as a base1283) of thecamera1200′,1200″. Theguide1290 may be implemented as a protrusion (also referred to as male rail or simply rail) which is configured for a cooperating sliding fit with a groove (also referred to as female track or simply track) on the eyewear. The one or more magnets may be provided on the protrusion or at other location(s) along thebase1283. In examples, the magnets may be positioned below the bottom surface of the guide. In some examples, the magnets may be substantially flush with the bottom surface of the guide. A coating or protective layer may be provided on the contact surface of the magnets to prevent the guide from scratching any exterior/aesthetic surfaces of the eyewear as may otherwise result from slidable engagement t camera guide and the eyewear guide.
• Thecamera1200′ may include one or more user controls1294. The user controls1294 may be implemented in the form of buttons, switches, or the like. To maintain waterproof characteristics of the camera, in some examples, such buttons or switches may be provided below a flexible portion of the housing. That is, one or more portions of thehousing1280 may be formed of a resilient material such as rubber, silicon, or the like, such that that portion of the housing may be deflected to operate a button located below the flexible portion. In some examples, theuser controls1294 may be implemented using one or more capacitive surfaces. For example, acapacitive switch1295, which may include a smooth or textured surface, may be provided along a sidewall of the camera. The capacitive surface may be molded with the housing to provide an integral, water-tight user control. Thecapacitive switch1295 may function as a trigger for capturing an image. In some examples, the same user control (e.g., capacitive switch1295) may be configured to perform different functions depending on the manipulation of the user control. For example, a single input via the user control (e.g., single touch or click) may correspond with one function (e.g., capture an image), a double input (e.g., two consecutive touches or double clicks) may correspond with another function (e.g., initiate image transfer), a continuous input (e.g., a touch/click and hold) may correspond with yet another function (e.g., configuring a setting or a parameter of the camera, powering the camera on or off). These specific examples of functions or types of manipulations of the user control are illustrative only and other combinations of functions and/or manipulations of the user control(s) may be used.
• User controls may be provided along one or more sides of the housing, for example along the sidewall, as shown in FIG,12 or along aback wall1289′, as shown inFIG. 13. The camera may also include one or more securing features1297. The camera may be configured to engage a securing ring which may be connected to the eyewear. The securing ring may be configured to provide an additional attachment means for ensuring that the camera remains connected to the eyewear even if the magnetic attachment fails. The securing ring may be made from a clear plastic material (e.g., clear rubber or silicon) and may have a diameter of the core ranging between 0.01 min to about 2 mm. The camera may include asecuring feature1297 which may be in the form of a securing pin, as shown inFIG. 12 or a securing aperture, as shown inFIG. 13 for engaging the securing ring. In the example inFIG. 13, the securing aperture may be arranged such that a plane of a diameter of the aperture is generally perpendicular to theback wall1289′ and/or base of the camera. In some examples, the plane of the diameter of the aperture may be generally parallel with the longitudinal direction of theguide1290.
• The camera may include one ormore indicators1296. Theindicators1296 may be provided along one or more sides of thecamera1200′,1200″, for example along a top side of the camera, as in the example inFIG. 12 or on theback wall1289′ of the camera, as inFIG. 13. The indicators may be implemented in the form of one or more white or colored LEDs, which based on a color, duration or pattern of illumination may provide indication as to different functions or states of the camera or components thereof. The indicators may include a charge status indicator, a power On/Off indicator, a privacy indicator, or others. For example, a privacy indicator may comprise one or more LEDs which may illuminate when an image (e.g., a still image or video) is being captured. The illumination may notify others that an image is being captured. In some examples, audible, vibrational, or other tactile feedback may be used for the one or more indicators. In some examples, the camera may be configured to provide audible feedback sounds to the user. For example, the camera may include a vibration source, a speaker, a buzzer, or other audio generating device and the indication may be provided by tactile or audible means.
• In some examples, the camera may be devoid of a view finder. Commercially available cameras typically include a view finder, which in the case of digital cameras is typically in the form of a display. The view finder allows the user to visualize the image that will be captured by the image sensor thereby giving the user an opportunity to adjust the direction in which the camera is pointing so as to capture the desired image. A view finder however significantly increases the overall size of the camera because an additional display device has to be added in the case of digital camera to provide a view finder. Such a size increase may be undesirable or impractical in some examples, such as for a wearable or other small or miniaturized form factor cameras according to the present disclosure. In some examples, the camera does not include a view-finder and the user may not be able to preview the image to be captured prior to capturing it. Configuration parameters for auto-alignment and/or auto-centering of images captured by a camera of the present disclosure may be developed in accordance with further examples herein.
• An example system and process for automatic processing of an image is described further with reference toFIGS. 14 and 15. As shown inblocks1405 and1410 ofFIG. 14, a.process1400 may include the steps of capturing a first image with a camera (e.g.,camera1500 inFIG. 15), and wirelessly transmitting the first image to a computing system (e.g.,computing system1 inFIG. 15). Thecamera1500 may include animage sensor1502 and, amemory1504. Thecamera1500 may be configured to receive power wirelessly in accordance with the examples herein. In this regard, thecamera1500 may include some or all of the components of cameras described herein (e,u.,camera1200,1200′,1200″) thus for brevity the description of these components will not be repeated. Thecamera1500 may be configured to communicate wirelessly with one or more computing systems. Thecamera1500 may include awireless communication device1506 such as a Wi-Fi enabled or Bluetooth enabled receiver/transmitter or a receiver/transmitter configured additionally for wireless power reception, as described herein. In some examples, the camera may be devoid of a view finder thus the captured first image may not have been previewed prior to capture.
• The computing system may be a personal computer, laptop, or a smart device such as a tablet or a mobile phone. The computing system (e.g., computing system1) may include amemory1530, aprocessor1522, adisplay1524, and a wireless communication device1526 (e.g., Wi-Fi enabled or Bluetooth enabled receiver/transmitter and/or a receiver transmitter configured to also broadcast wireless power and/or receive data). In some examples, thecomputing system1 may be the base unit or a communication device to which the base unit is attached. The memory may be configured to store processor-executable instructions, data (e.g.,images1534 received from the camera), and one or more configuration parameters1536 associated with the camera.
• The first image captured bycamera1500 may be used as a set-up or reference image. The first image may be displayed on a display of the computing system (e.g.,display1524 of computing system1), as shown inblock1415 ofFIG. 14. The user may modify the first image, for example by changing the center of the image, or changing an orientation of the image. This user-directed modification to the first image may be received by the computing system as an indication of an adjustment to the location of the center of the first image or the orientation of the first image, as shown inblock1420. The computing system may generate configuration parameters1536 corresponding to the adjustment, as shown inblock1425 and store the configuration parameters1536 in memory (e.g., memory1530). This may complete a configuration or set-up process. In subsequent steps, the user may capture additional images with the camera (e.g., camera1500). The images may be transmitted to the computing system (e.g., computing system1) for processing (e.g., batch processing). The computing system may retrieve the configuration parameter1536 following receipt of a second image from the camera and may automatically modify the second image in accordance with the configuration parameters1536, as shown inblock1430 inFIG. 14. For example, the computing system may automatically center or rotate the image by a corresponding amount as in the first image. This modification may be performed automatically (e.g., without further user input) and/or in batch upon receiving additional images from the camera, which may reduce subsequent processing steps that the user may need to perform to the images. In some examples, initial modification (e.g., as directed by user input) may include cropping the image, which may be reflected in the configuration parameter. Thus, in some examples, automatic modification of subsequent images may also include cropping a second image based on the configuration parameters1536. In some examples, the camera may be operable to be communicatively coupled to two or more computing systems. For example, the camera may be configured to receive power and data from and/or transfer data to a second computing system (e.g., computing system2). The second computing system may be a personal computer, laptop, a smart device. In some examples, the second computing system may be a base unit of a wireless power transfer system or a communication device to which such base unit is coupled. In some examples, the first computing system may be configured to transmit (e.g., wirelessly) the configuration parameters1536 to the camera. The configuration parameters1536 may be stored in memory onboard the camera (e.g., memory1504) and may be transmitted to other computing devices different from the initial computing device which generated the configuration parameters. The configuration parameters1536 may be transmitted to these other computing devices for example prior to or along with images transferred thereto, which may enable automatic processing/modification of images by additional computing device other than the computing device used in the initial set-up process. It will be appreciated that the designation of computing system as first or second is provided for clarity of illustrations and in examples, the set-up/configuration steps may be performed by the second computing system. It will be further understood that while two computing systems are illustrated inFIG. 15, embodiments according to the present disclosure may include any number of computing systems.
• In some examples, a process for auto-centering of an image may include the steps of capturing an image with a camera (e.g., camera.1500). The camera may be devoid of a view finder. Thecamera1500 may wirelessly transmit the image to a computing system (e,g.,computing system1 or computing system2). The computing system may include processor-executable instructions (e.g., instructions1532) for processing the image, for example for auto-centering the image based on a number of objects in the image. For example, the computing system may include processor-executable instructions for identifying number of objects in the image. In some examples, the objects may be one or more heads, which may be human heads, or other objects such as buildings, or other natural or man-made structures. Following identification of the number of objects, the computing system may determine a middle object from the number of objects. For example, if the computing system determines that there are 5 heads in the image, the middle head, which may be the 3^rdhead, may be selected as the middle head, if the computing system determines that there are 7 heads, the 4^thhead may be determined as the middle head, and so on. In some examples, the computing system may include instructions for centering the image between two adjacent object. For example, if an even number of objects are identified, the computing system may be configured to split the difference between the middle two adjacent object and center the image there. In some examples, the computing system may refer to a look-up table which may identify the middle object(s) for any given number of objects. The computing system may then automatically center the image on the middle object or a midpoint between two adjacent middle objects. In other words, the computing system may be configured to count the number of heads in the captured image and center the captured image on the middle head or the midpoint between two adjacent middle objects. The computing system may store the modified image centered in accordance with the examples herein.
• The above detailed description of examples is not intended to be exhaustive or to limit the method and system for wireless power transfer to the precise form disclosed above. While specific embodiments of, and examples for, the method and systems for wireless power transfer are described above for illustrative purposes, various equivalent modifications are possible within the scope of the system, as those skilled in the art will recognize. For example, while processes or blocks are presented in a given order, alternative embodiments may perform routines having operations, or employ systems having blocks, in a different order, and some processes or blocks may be deleted, moved, added, subdivided, combined, and/or modified. While processes or blocks are at times shown as being performed in series, these processes or blocks may instead be performed in parallel, or may be performed at different times. It will be further appreciated that one or more components of base units, electronic devices, or systems in accordance with specific examples may be used in combination with any of the components of base units, electronic devices, or systems of any of the examples described herein.

Claims (25)

What is claimed is:

1. A camera comprising:

an image capture device;

a receiver configured to receive power wirelessly from a distance separated transmitting coil of a wireless power transfer system which includes a base unit, wherein the receiver comprises a receiving coil having a magnetic core;

a rechargeable battery coupled to the receiver for storing wirelessly received power;

a memory configured to store images captured with the image capture device; and

wherein the camera is configured to transfer data including one or more images captured with the image capture device to another computing device.

2. The camera ofclaim 1, wherein the receiving coil is configured to receive power form the transmitting coil regardless of orientation between the receiving and transmitting coils.

3. The camera ofclaim 1, wherein the magnetic core comprises a ferrite core.

4. The camera ofclaim 1, wherein at least the image capture device, the receiving coil, the processor, and the memory are enclosed in a housing configured to be movably coupled to a wearable article.

5. The camera of claim I, wherein the housing includes a guide comprising one or more magnets for magnetically attaching the camera to a wearable article.

6. The camera ofclaim 5, wherein the wearable article is eyewear.

7. The camera ofclaim 1, wherein the another computing device is the base unit.

8. The camera ofclaim 1 further configured to broadcast a proximity signal for detecting the wireless power receiver in proximity.

9. The camera ofclaim 1 further comprising a status indicator, a privacy indicator, or combinations thereof.

10. The camera ofclaim 1, wherein the camera is configured to be magnetically attached to eyewear, and wherein the camera is connected to a securing ring configured to be attached to the eyewear.

11. The camera ofclaim 10, wherein the securing ring is made of a plastic material.

12. . The camera ofclaim 11, wherein the securing ring comprises a core diameter greater than 0.01 mm and less than 2 mm.

13. The camera ofclaim 12, wherein the core diameter is less than 1 mm.

14. The camera ofclaim 1, wherein the camera is devoid of a view finder.

15. The camera ofclaim 1, wherein a dimension of the transmitting coil is two times that of the receiving coil.

16. A system comprising:

a base unit comprising a transmitter configured for wireless power delivery and a battery coupled to the transmitter, wherein the transmitter comprises a transmitting coil having a magnetic core; and

a wearable camera separated from the base unit, the wearable camera comprising a receiver inductively coupled to the transmitter to receive power from the base unit while the wearable camera remains within a charging distance from the base unit; wherein the receiver comprises a receiving coil having a magnetic core, wherein a dimension of the transmitting coil is at least twice a dimension of the receiving coil.

17. The system ofclaim 16, wherein:

the dimension of the transmitting coil is a diameter of the transmitting coil, a length or a diameter of a wire forming windings of the transmitting coil, a number of windings of the transmitting coil, or a length, a diameter or a surface area of the core of the transmitting coil; and

the dimension of the receiving coil is respectively a diameter of the receiving coil, a length or a diameter of a wire forming windings of the receiving coil, a number of windings of the receiving coil, or a length, a diameter or a surface area of the core of the receiving coil.

18. The system ofclaim 16, wherein xe transmitter and receiver and configured for operation with a Q value less than 100.

19. The system ofclaim 16, wherein the transmitter and receiver and configured are configured to operate at a frequency within the range of 50 kHz or 500 kHz, wherein the transmitter and receiver are configured to operate in weak resonance, and wherein the system is configured to operate using an amount of guided flux.

20. The system ofclaim 16, wherein the base unit is mechanically coupled to a portable communication device.

21. The system ofclaim 16, wherein the transmitter comprises an omnidirectional antenna configured to transmit power to one or more electronic devices including the wearable camera regardless of orientation of the electronic devices with respect to the base unit.

22. The system ofclaim 16, wherein the wearable camera is configured to be magnetically attached to eyewear.

23. A camera comprising an image sensor, a battery, and a memory, wherein the camera is devoid of a view finder and wherein the camera is configured to be attachable to and detachable from eyewear, the camera further comprising a safety feature for preventing loss of the camera in the event of accidental detachment of the camera from the eyewear, wherein the safety feature comprises a safely ring attached to a portion of the camera and configured to be attached to a temple of the eyewear.

24. The camera ofclaim 23, wherein the battery is a rechargeable battery, the camera further comprising a receiver operatively coupled to the battery and configured to receive power signals wirelessly for charging the battery.

25. The camera ofclaim 24, wherein the camera is configured to be magnetically attached to the eyewear.

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