US20080088582A1 - Gimballed scroll wheel - Google Patents

Abstract

An input device that includes both a movement detector, such as mechanical switch, and positional indicator, such as touch pad touch screen, and/or touch sensing housing is disclosed. These two input devices can be used substantially simultaneously to provide a command to the device. In this manner, different commands can be associated with depressing a moveable member in different areas and a single moveable member can perform like several buttons.

Description

CROSS-REFERENCE TO RELATED APPLICATION
• This application claims the benefit of U.S. Provisional Application Ser. No. 60/850,662, filed Oct. 11, 2006.
TECHNICAL FIELD
• This relates to methods and devices in which data associated with a first input, such as a touch pad or touch screen, and data associated with a second input, such as a button, may both be used in combination to generate a single command.
BACKGROUND
• Several kinds of input devices are known for performing operations in a computing device. Some examples of input devices include buttons, switches, keyboards, mice, trackballs, touch pads, joy sticks, touch screens and the like. Each of these devices has advantages and disadvantages that may be taken into account when designing an input apparatus for a computing device. The operations generally include moving a cursor and selecting items displayed on a display screen. The operations may also include paging, scrolling, panning, zooming, etc.
• Some input devices are better configured to perform certain functions than other input devices. For example, touch pads and touch screens are useful for providing location information and buttons are useful for indicating selections. Since most computing devices perform several different functions, a combination of different input devices that are able to provide input in different manners is often desired.
• In addition, many computing devices are designed to be portable, for example, media players, remote controls, personal digital assistants (PDAs), cellular phones, etc. Designing input devices for these portable devices presents some unique problems. For example, there is typically a push to increase the ability and, thus, the number of functions that these portable computing devices are able to perform. As the number of operations that these portable devices perform increases, the number of controls desired to control these operations and the complexity of these controls also typically increase. A competing concern is that there is also pressure to make portable computing devices smaller, and thus, more portable. However, as the size of these devices decreases, the amount of space in which to locate input devices also decreases.
• Accordingly, a need exists for compact input device configurations that can be used to control a variety of different functions in a variety of different manners.
SUMMARY
• Described herein are exemplary embodiments of devices, including computing devices, that use at least two different input devices substantially simultaneously to generate a single command. One example of two different input devices may include a movement detector, such as a mechanical switch, and a position indicator, such as a touch pad or touch screen. By using such different input devices in combination, the number of operations that can be controlled by these two input devices can be increased. In addition, the benefits associated with each of these two different input devices can be used while making the command. These input devices may also be layered, one on top of the other, further decreasing the amount of space on a device used by the input devices.
• In some embodiments the input device may include a movement detector, such as a dome switch, placed under a platform that includes a position indicator. The device can then use the movement of the platform in making selections. Since this movement can be felt by a user of the device, this configuration allows the device to give tactile feedback to the user while the user is making a selection. This tactile feedback can further be improved by configuring the device to provide a “click” sensation when the platform is depressed.
• When the platform is depressed or otherwise moved by a user's finger (or stylus or other device), a movement detector can detect this movement. In this manner, the platform operates as a button. In some embodiments the entire platform may be depressed. In other embodiments, a portion of the platform may be depressed, causing the platform to tilt or “gimbal.”
• A position indicator can be configured to indicate the position on the platform that has been acted on by the user's finger or other device. Examples of a position indicator include a touch pad and a touch screen. The touch pad or touch screen can be located directly on the platform.
• A processor can then be configured to generate a single command that is dependent on both the input from the movement detector and the input from the position indicator. In this manner, different commands can be associated with depressing the platform in different locations, enabling a single platform to provide the functionality of multiple buttons. The platform may also include predetermined zones. An example of a device that includes predetermined button zones can be found in U.S. patent application Ser. No. 11/592,679, entitled “MOVABLE TOUCH PAD WITH ADDED FUNCTIONALITY,” filed Nov. 3, 2006, which is hereby incorporated by reference. The processor can then be configured to generate a command that is dependent on the zone in which a user depresses the platform.
• Unlike a touch pad or touch screen or non-mechanical sensor alone, this configuration allows the user to receive the tactile feedback associated with buttons while making selections. Further, the number of mechanical movement indicators and the amount of space on a device used for issuing selections can be decreased.
• Embodiments of an input device may include a platform suspended on a single flexible member. The flexible member may, for example, be in the shape of a bubble that presses the platform against a housing. The flexible member allows the platform to be tilted 360 degrees about an axis. A movement detector can be configured to detect the movement of the movable platform relative to the housing. The platform also may include a variety of components including a position sensing device to detect the position of a user's finger on the platform when the platform is tilted or depressed.
• Examples of devices that may use the input devices described herein include media players, desktop computers, laptop computers, keyboard units, personal digital assistants (PDAs), cellular phones, and remote controls.
BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 illustrates an example of a perspective view of an input device according to an embodiment of the present invention.
• FIGS. 2A and 2B illustrate an example of simplified side views of an input device having a button touch pad according to an embodiment of the present invention.
• FIG. 3 illustrates an example of a simplified block diagram of an input device connected to a computing device according to an embodiment of the present invention.
• FIG. 4 illustrates an example of a simplified perspective diagram of an input device according to an embodiment of the present invention.
• FIGS. 5A-5C illustrate an example of a side view, in cross section, of an input device according to an embodiment of the present invention.
• FIGS. 6A-6C illustrate an example of a side view, in cross section, of an input device according to an embodiment of the present invention.
• FIG. 7 illustrates an example of a perspective diagram of a media player according to an embodiment of the present invention.
• FIG. 8 illustrates an example of a perspective diagram of a laptop computer according to an embodiment of the present invention.
• FIG. 9 illustrates an example of a perspective diagram of a desktop computer with a peripheral input device connected thereto according to an embodiment of the present invention.
• FIG. 10 illustrates an example of a perspective diagram of a remote control using an input device according to an embodiment of the present invention.
• FIG. 11 illustrates an example of an exploded perspective diagram of a media player and input device assembly according to an embodiment of the present invention.
• FIG. 12 illustrates an example of a side elevation view of the bottom side of a media player containing an input device according to an embodiment of the present invention.
• FIG. 13 illustrates an example of a simplified block diagram of a remote control according to an embodiment of the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
• The representative embodiments described herein relate to devices that use signals from a movement indicator and a position indicator substantially simultaneously to generate a single command. A platform mounted in a frame of the device can include sensors that can indicate the position of an object, such as a user's finger, in contact with the platform. In addition, a movement indicator on the device can detect movement of the platform relative to the frame.
• A user can depress the platform to generate a button command. Since the position of the activation force on the touch pad or touch screen can be determined from the positional indicator, different button commands can be generated depending where on the platform the user depresses the platform.
• In the following description of preferred embodiments, reference is made to the accompanying drawings which form a part hereof. It is to be understood that other embodiments may be used and structural changes may be made without departing from the scope of the preferred embodiments. In addition, the following description includes examples that utilize a touch pad as an object sensing device to provide location or other input data. It is understood that reference to a touch pad can also refer to other object sensing devices including (without limitation) touch sensing devices and/or proximity sensing devices, and further including (for example) touch pads, touch screens and/or touch sensing housings.
• FIG. 1 illustrates one example of a simplified perspective view of aninput device430. In this example, theinput device430 is generally configured to send information or data to an electronic device in order to perform an action on a display screen (e.g., via a graphical user interface). Examples of actions that may be performed include, moving an input pointer, making a selection, providing instructions, etc. The input device may interact with the electronic device through a wired connection (e.g., cable/connector) or a wireless connection (e.g., IR, Bluetooth, etc.). Theinput device430 may be a stand alone unit or it may be integrated into the electronic device. As a stand alone unit, the input device may have its own enclosure. When integrated into an electronic device, the input device typically uses the enclosure of the electronic device. In either case, the input device may be structurally coupled to the enclosure, as for example, through screws, snaps, retainers, adhesives and the like. In some cases, the input device may be removably coupled to the electronic device, as for example, through a docking station. The electronic device to which the input device is coupled may correspond to any consumer related electronic product. By way of example, the electronic device may correspond to a computer such as desktop computer, laptop computer or PDA, a media player such as a music player, a communication device such as a cellular phone, another input device such as a keyboard, and the like.
• As shown inFIG. 1, in this embodiment theinput device430 may include a frame432 (or support structure) and atouch pad434. Theframe432 provides a structure for supporting the components of the input device. Theframe432 in the form of a housing may also enclose or contain the components of the input device. The components, which include thetouch pad434, may correspond to electrical, optical and/or mechanical components for operating theinput device430.
• Thetouch pad434 provides location information for an object in contact with or in proximity to the touch pad. This information can be used in combination with information provided by a movement indicator to generate a single command associated with the movement of the touch pad. The touch pad can be used as an input device by itself; for example, the touch pad may be used to move an object or scroll through a list of items on the device.
• Thetouch pad434 may be widely varied. For example, thetouch pad434 may be a conventional touch pad based on the Cartesian coordinate system, or thetouch pad434 may be a touch pad based on a Polar coordinate system. An example of a touch pad based on polar coordinates may be found in U.S. Pat. No. 7,046,230, entitled “TOUCH PAD FOR HANDHELD DEVICE,” which is herein incorporated by reference. Furthermore, thetouch pad434 may be used in at least two different modes, which may be referred to as a relative mode and/or an absolute mode. In absolute mode, thetouch pad434 reports the absolute coordinates of the location at which it is being touched. For example, these would be “x” and “y” coordinates in the case of a standard Cartesian coordinate system or (r,θ) in the case of a Polar coordinate system. In relative mode, thetouch pad434 reports the direction and/or distance of change, for example, left/right, up/down, and the like. In most cases, the signals produced by thetouch pad434 direct movement on the display screen in a direction similar to the direction of the finger as it is moved across the surface of thetouch pad434.
• The shape of thetouch pad434 may be widely varied. For example, thetouch pad434 may be circular, oval, square, rectangular, triangular, and the like. In general, the outer perimeter of thetouch pad434 defines the working boundary of thetouch pad434. In the illustrated embodiment, the touch pad is circular. Circular touch pads allow a user to continuously swirl a finger in a free manner, i.e., the finger can be rotated through 360 degrees of rotation without stopping. This form of motion may produce incremental or accelerated scrolling through a list of songs being displayed on a display screen, for example. Furthermore, the user can rotate his or her finger tangentially from all sides, thus providing more finger position range. Both of these features may help when performing a scrolling function. Furthermore, the size of thetouch pad434 generally corresponds to a size that allows it to be easily manipulated by a user (e.g., the size of a finger tip or larger).
• Thetouch pad434, which generally takes the form of a rigid planar platform, includes a touchableouter surface436 for receiving a finger (or object) for manipulation of the touch pad. Although not shown inFIG. 1, beneath the touchableouter surface436 is a sensor arrangement that is sensitive to such things as the pressure and movement of a finger thereon. The sensor arrangement typically includes a plurality of sensors that may be configured to activate as the finger sits on, taps on or passes over them. In the simplest case, an electrical signal is produced each time the finger is positioned over a sensor. The number of signals in a given time frame may indicate location, direction, speed and acceleration of the finger on thetouch pad434, i.e., the more signals, the more the user moved his or her finger. In most cases, the signals are monitored by an electronic interface that converts the number, combination and frequency of the signals into location, direction, speed and acceleration information. This information may then be used by the electronic device to perform the desired control function on the display screen. The sensor arrangement may be widely varied. By way of example, the sensors may be based on resistive sensing, surface acoustic wave sensing, pressure sensing (e.g., strain gauge), optical sensing, capacitive sensing and the like.
• In the illustrated embodiment, thetouch pad434 is based on capacitive sensing. A capacitively based touch pad is arranged to detect changes in capacitance as the user moves an object such as a finger around the touch pad. In most cases, the capacitive touch pad includes a protective shield, one or more electrode layers, a circuit board and associated electronics including an application specific integrated circuit (ASIC). The protective shield is placed over the electrodes; the electrodes are mounted on the top surface of the circuit board; and the ASIC is mounted on the bottom surface of the circuit board. The protective shield serves to protect the underlayers and to provide a surface for allowing a finger to slide thereon. The surface is generally smooth so that the finger does not stick to it when moved. The protective shield also provides an insulating layer between the finger and the electrode layers. The electrode layer includes a plurality of spatially distinct electrodes. Any suitable number of electrodes may be used. As the number of electrodes increases, the resolution of the touch pad also increases.
• Capacitive sensing works according to the principles of capacitance. As should be appreciated, whenever two electrically conductive members come close to one another without actually touching, their electric fields interact to form capacitance. In the configuration discussed above, the first electrically conductive member is one or more of the electrodes and the second electrically conductive member is the finger of the user. Accordingly, as the finger approaches the touch pad, a tiny capacitance forms between the finger and the electrodes in close proximity to the finger. The capacitance in each of the electrodes is measured by the ASIC located on the backside of the circuit board. By detecting changes in capacitance at each of the electrodes, the ASIC can determine the location, direction, speed and acceleration of the finger as it is moved across the touch pad. The ASIC can also report this information in a form that can be used by the electronic device.
• In accordance with one embodiment, thetouch pad434 is movable relative to theframe432. This movement is detected by a movement detector that generates another control signal. By way of example, thetouch pad434 in the form of the rigid planar platform may rotate, pivot, slide, translate, flex and/or the like relative to theframe432. Thetouch pad434 may be coupled to theframe432 and/or it may be movably restrained by theframe432. By way of example, thetouch pad434 may be coupled to theframe432 through axels, pin joints, slider joints, ball and socket joints, flexure joints, magnets, cushions and/or the like. Thetouch pad434 may also float within a space of the frame (e.g., gimbal). It should be noted that theinput device430 may additionally include a combination of joints such as a pivot/translating joint, pivot/flexure joint, pivot/ball and socket joint, translating/flexure joint, and the like to increase the range of movement (e.g., increase the degree of freedom).
• When moved, thetouch pad434 is configured to actuate a movement detector circuit that generates one or more signals. The circuit generally includes one or more movement detectors such as switches, sensors, encoders, and the like.
• In the illustrated embodiment, thetouch pad434 is part of a depressible platform. The touch pad operates as a button and performs one or more mechanical clicking actions. Multiple functions of the device can be accessed by depressing thetouch pad434 in different locations. A movement detector signals that thetouch pad434 has been depressed, and thetouch pad434 signals a location on the platform that has been touched. By combining both the movement detector signals and the touch pad signals, thetouch pad434 acts like multiple buttons such that depressing the touch pad at different locations corresponds to different buttons. As shown inFIGS. 2A and 2B, according to one embodiment thetouch pad434 is capable of moving between an upright position (FIG. 2A) and a depressed position (FIG. 2B) when a substantial force from afinger438, palm, hand or other object is applied to thetouch pad434. Thetouch pad434 is typically spring biased in the upright position, as for example through a spring member. Thetouch pad434 moves to the depressed position when the spring bias is overcome by an object pressing on thetouch pad434.
• As shown inFIG. 2A, thetouch pad434 generates tracking signals when an object such as a user's finger is moved over the top surface of the touch pad in the x, y plane. As shown inFIG. 2B, in the depressed position (z direction), thetouch pad434 generates both positional information and a movement indicator generates a signal indicating that thetouch pad434 has moved. The positional information and the movement indication are combined to form a button command. Different button commands can correspond to depressing thetouch pad434 in different locations. The different button commands may be used for various functionalities including, but not limited to, making selections or issuing commands associated with operating an electronic device. By way of example, in the case of a music player, the button commands may be associated with opening a menu, playing a song, fast forwarding a song, seeking through a menu and the like.
• To elaborate, thetouch pad434 is configured to actuate a movement detector, which together with the touch pad positional information, forms a button command when thetouch pad434 is moved to the depressed position. The movement detector is typically located within theframe432 and may be coupled to thetouch pad434 and/or theframe432. The movement detector may be any combination of switches and sensors. Switches are generally configured to provide pulsed or binary data such as activate (on) or deactivate (off). By way of example, an underside portion of thetouch pad434 may be configured to contact or engage (and thus activate) a switch when the user presses on thetouch pad434. The sensors, on the other hand, are generally configured to provide continuous or analog data. By way of example, the sensor may be configured to measure the position or the amount of tilt of thetouch pad434 relative to the frame when a user presses on thetouch pad434. Any suitable mechanical, electrical and/or optical switch or sensor may be used. For example, tact switches, force sensitive resistors, pressure sensors, proximity sensors, and the like may be used. In some case, the spring bias for placing thetouch pad434 in the upright position is provided by a movement detector that includes a spring action.
• FIG. 3 illustrates an example of a simplified block diagram of acomputing system439. The computing system generally includes aninput device440 operatively connected to acomputing device442. By way of example, theinput device440 may generally correspond to theinput device430 shown inFIGS. 1,2A and2B, and thecomputing device442 may correspond to a computer, PDA, media player or the like. As shown, theinput device440 includes adepressible touch pad444 and one ormore movement detectors446. Thetouch pad444 is configured to generate tracking signals and themovement detector446 is configured to generate a movement signal when the touch pad is depressed. Although thetouch pad444 may be widely varied, in this embodiment, thetouch pad444 includescapacitance sensors448 and acontrol system450 for acquiring the position signals from thesensors448 and supplying the signals to thecomputing device442. Thecontrol system450 may include an application specific integrated circuit (ASIC) that is configured to monitor the signals from thesensors448, to compute the angular location, direction, speed and acceleration of the monitored signals and to report this information to a processor of thecomputing device442. Themovement detector446 may also be widely varied. In this embodiment, however, themovement detector446 takes the form of a switch that generates a movement signal when thetouch pad444 is depressed. Theswitch446 may correspond to a mechanical, electrical or optical style switch. In one particular implementation, theswitch446 is a mechanical style switch that includes a protrudingactuator452 that may be pushed by thetouch pad444 to generate the movement signal. By way of example, the switch may be a tact or dome switch.
• Both thetouch pad444 and theswitch446 are operatively coupled to thecomputing device442 through acommunication interface454. The communication interface provides a connection point for direct or indirect connection between the input device and the electronic device. Thecommunication interface454 may be wired (wires, cables, connectors) or wireless (e.g., transmitter/receiver).
• Referring to thecomputing device442, thecomputing device442 generally includes a processor457 (e.g., CPU or microprocessor) configured to execute instructions and to carry out operations associated with thecomputing device442. For example, using instructions retrieved from memory, the processor may control the reception and manipulation of input and output data between components of thecomputing device442. Theprocessor457 is configured to receive input from both theswitch446 and thetouch pad444 and form a single command that is dependent upon both of these inputs. In most cases, theprocessor457 executes instruction under the control of an operating system or other software. Theprocessor457 can be a single-chip processor or can be implemented with multiple components.
• Thecomputing device442 also includes an input/output (I/O)controller456 that is operatively coupled to theprocessor457. The (I/O)controller456 may be integrated with theprocessor457 or it may be a separate component as shown. The I/O controller456 is generally configured to control interactions with one or more I/O devices that can be coupled to thecomputing device442, as for example theinput device440. The I/O controller456 generally operates by exchanging data between thecomputing device442 and I/O devices that desire to communicate with thecomputing device442.
• Thecomputing device442 also includes adisplay controller458 that is operatively coupled to theprocessor457. Thedisplay controller458 may be integrated with theprocessor457 or it may be a separate component as shown. Thedisplay controller458 is configured to process display commands to produce text and graphics on adisplay screen460. By way of example, thedisplay screen460 may be a monochrome display, color graphics adapter (CGA) display, enhanced graphics adapter (EGA) display, variable-graphics-array (VGA) display, super VGA display, liquid crystal display (e.g., active matrix, passive matrix and the like), cathode ray tube (CRT), plasma displays and the like. In the illustrated embodiment, the display device corresponds to a liquid crystal display (LCD).
• In most cases, theprocessor457 together with an operating system operates to execute computer code and produce and use data. The computer code and data may reside within aprogram storage area462 that is operatively coupled to theprocessor457.Program storage area462 generally provides a place to hold data that is being used by thecomputing device442. By way of example, the program storage area may include Read-Only Memory (ROM), Random-Access Memory (RAM), hard disk drive and/or the like. The computer code and data could also reside on a removable program medium and loaded or installed onto the computing device when needed. In one embodiment,program storage area462 is configured to store information for controlling how the tracking and movement signals generated by the input device are used in combination by thecomputing device442 to generate a single button command.
• FIG. 4 is a simplified perspective diagram of aninput device470. Like the input device shown in the embodiment ofFIGS. 2A and 2B, thisinput device470 incorporates the functionality of a button (or buttons) directly into thetouch pad472, i.e., the touch pad acts like a button. In this embodiment, however, thetouch pad472 is divided into a plurality of independent and spatiallydistinct button zones474. Thebutton zones474 represent regions of thetouch pad472 that may be moved by a user to implement distinct button functions. The dotted lines represent areas of thetouch pad472 that make up an individual button zone. Any number of button zones may be used, for example, two or more, four, eight, etc. In the illustrated embodiment, thetouch pad472 includes four button zones474 (i.e., zones A-D).
• As should be appreciated, the button functions generated by pressing on each button zone may include selecting an item on the screen, opening a file or document, executing instructions, starting a program, viewing a menu, and/or the like. The button functions may also include functions that make it easier to navigate through the electronic system, as for example, zoom, scroll, open different menus, home the input pointer, perform keyboard related actions such as enter, delete, insert, page up/down, and the like. In the case of a music player, one of the button zones may be used to access a menu on the display screen, a second button zone may be used to seek forward through a list of songs or fast forward through a currently playing song, a third button zone may be used to seek backwards through a list of songs or fast rearward through a currently playing song, and a fourth button zone may be used to pause or stop a song that is being played.
• To elaborate, thetouch pad472 is capable of moving relative to theframe476 so as to create a clicking action. Theframe476 may be formed from a single component or it may be a combination of assembled components. The clicking action actuates a movement detector contained inside theframe476. The movement detector is configured to sense movements of the button zones during the clicking action and to send a signal corresponding to the movement to the electronic device. By way of example, the movement detectors may be switches, sensors and/or the like.
• In addition, thetouch pad472 is configured to send positional information on what button zone is being acted on when the clicking action occurs. The positional information allows to device to determine which button zone is being activated when the touch pad is moved relative to the frame.
• The movements of each of thebutton zones474 may be provided by various rotations, pivots, translations, flexes and the like. In one embodiment, thetouch pad472 is configured to gimbal relative to theframe476. By gimbal, it is generally meant that thetouch pad472 is able to float in space relative to theframe476 while still being constrained thereto. The gimbal may allow thetouch pad472 to move in single or multiple degrees of freedom (DOF) relative to the housing, for example, movements in the x, y and/or z directions and/or rotations about the x, y, and/or z axes (θ_xθ_yθ_z).
• FIGS. 5A-5C show a particular implementation of ainput device600. Theinput device600 includes atouch pad605 mounted on agimbal plate604. The gimbal plate is held within aspace601 in a housing withtop plate602. Thegimbal plate604 lies on top of a singleflexible member608.
• One or more movement detectors are activated by the movement ofgimbal plate605. For example, one or more movement detectors can be positioned around or ongimbal plate608 and can be activated by the tilt or other desired movement ofgimbal plate608.Flexible member608 can be part of the movement detector, for example the dome on a SMT dome switch.
• Theflexible member608 can be formed in a bubble shape that provides the spring force to push the gimbal plate into mating engagement with the top wall offrame602 and away fromsupportive surface608.Tab606 protrudes from the side ofgimbal plate606 and extends undertop plate602.
• The gimbal plate is allowed to float withincutout601. The shape of thespace601 generally coincides with the shape of thegimbal plate604. As such, the unit is substantially restrained along the x and y axes via aside wall603 of thetop plate602 and along the z axis via engagement oftop plate602 andtab606 ongimbal plate604.Gimbal plate604 is thus capable of moving withinspace601 while still being prevented from moving entirely out of thespace601 via the walls of thetop plate602.
• With respect toFIGS. 5B and 5C, according to one embodiment, a user presses on thegimbal plate604 in the location of the desired button function. As shown inFIG. 5B, if the user presses on the side of thegimbal plate604, the gimbal plate tilts.Tab606 andsupportive surface610 limit the amount of tilt of the gimbal plate. The gimbal plate may be tilted about an axis in a 360 degree pattern around the gimbal plate. One or more movement detectors can be positioned to monitor the movement of the gimbal plate.
• 5C shows that if the user presses down on the center of thegimbal plate604, the gimbal plate moves down into the housing without tilting. The gimbal plate is nonetheless still restrained within the housing by the walls oftop plate602.
• Touch pad605, mounted ongimbal plate604, provides the position of the user's finger whengimbal plate604 is pressed. This positional information is used by the device to determine what button function is desired by the user. For example, the interface may be divided into distinct button zones as shown inFIG. 4. In this instance, activation of a single movement detector that monitors the movement ofgimbal plate604 can be used to provide several button commands. For example, a first signal generated bytouch pad605 ongimbal plate604 may generate a first signal that indicates the position of the user's finger on the gimbal plate. A movement detector such as a dome switch can then be used to generate a second signal that indicates that the gimbal plate has been moved, for example, depressed.
• The input device including the gimbal plate and a touch pad can be part of acomputer system439 as shown inFIG. 3. Thecommunication interface454 can provide the first and second signals provided by the touch pad and the movement detector respectively tocomputing device442 including aprocessor454. The processor can then determine which command is associated with the combination of the first and second signals. In this manner, activating the movement detector by pressing on the touch pad in different positions can correspond to different actions and a single movement detector can be used to provide the functionality of multiple buttons positioned around thegimbal plate604.
• By using a touch pad and the gimbal plate as configured inFIGS. 5A-5C, multiple button functions can be accessed with a single movement detector. This can be used to produce a device with fewer parts as compared to devices that use a different movement detector to produce each button command.
• Having only a single movement detector positioned under the gimbal plate also improves the tactile feel of the input device. A user of the device will feel only a single click on any part of the gimbal plate the user presses. Having multiple mechanical switch type movement detectors under a gimbal plate can result in a “crunching” type feel in which the user feels multiple clicks in series when they press down on the gimbal plate.
• FIGS. 6A-6C show a side cross section of an embodiment of aninput device620 that uses two dome switches. Onedome switch622 is activated by a user pressing anywhere around theclick wheel624, and thesecond dome switch626 is activated by depressing thecenter button628.
• FIGS. 6A-6C show a cross section of around click wheel624 that surroundscenter button628, which is positioned in the center of the click wheel. Theclick wheel624 includes atouch pad625. Theclick wheel624 is configured to gimbal relative to theframe630 in order to provide a clicking action for any position on theclick wheel624.
• Theclick wheel624 is restrained within aspace632 provided in theframe630. Theclick wheel624 is capable of moving within thespace632 while still being prevented from moving entirely out of thespace632 via the walls of theframe630. The shape of thespace632 generally coincides with the shape of theclick wheel624. As such, the unit is substantially restrained along the x and y axes via aside wall634 of theframe630 and along the z axis via atop wall636 and abottom wall640 of theframe630. A small gap may be provided between the side walls and the platform to allow the touch pad to gimbal 360 degrees around its axis without obstruction (e.g., a slight amount of play). In some cases, the platform may include tabs that extend along the x and y axes so as to prevent rotation about the z axis.
• Thecenter button628 is positioned within aspace642 in theclick wheel624. Thecenter button628 is constrained withinspace642 along the x and y axes viaside wall644 ofclick wheel624 and along the z axis bytabs646 ofclick wheel646 and bybottom wall640, which connects withlegs647 ofcenter button628 when the center button is pressed.
• Positioned beneath thecenter button628 are twodome switches622 and626. The two dome switches provide the mechanical spring action forcenter button628 and clickwheel624. Arigid plate648 is positioned between the two dome switches. Therigid plate648 extends through holes inlegs647 and underclick wheel624. In this manner, the rigid plate transmits the spring force of dome switches622 and626 to theclick wheel624 and the rigid plate transmits any force supplied by a user to clickwheel624 todome switch622.
• FIG. 6B shows how only clickwheel dome switch622 is activated when a user depressesclick wheel624. When a user depresses anywhere on theclick wheel624, the click wheel gimbals in thearea632 and the force of the user pressing down is conveyed toinverted dome switch622 byrigid plate648 andbottom wall640.Bottom wall640 may include anub650 for conveying the force of the click to the center of thedome switch622. Centerbutton dome switch626 does not actuate since it pivots together with theclick wheel624. The clearance between thecenter button628 and the snap dome below it remains constant as it pivots together with the wheel.
• FIG. 6C shows how only the center dome switch is activated when thecenter button628 is depressed. Thefeet647 ofcenter button628 prevent thebutton628 from exceeding the travel of theupper dome626. To ensure that only theupper dome626 is actuated, the actuation force of thelower dome622 is higher than the actuation force of thetop dome626. Thebutton628 may include anub652 for conveying the force of the click to the center of thedome switch626.
• As with the configuration described with respect toFIGS. 5A-5C, signals from atouch pad625 that forms part ofclick wheel624 were used in combination with the signal from the activation ofclick dome switch622 to simulate several buttons mounted in different areas aroundclick wheel624. This configuration, however, allows for a separate center button to be used. This can be particularly useful when a touch pad that only senses angular position is used in theclick wheel624. When only angular position is measured, a center button can not be simulated since the position of the user's finger relative to the center of theclick wheel624 is not measured.
• Although not shown, the touch pad may be back lit in some cases. For example, the circuit board can be populated with light emitting diodes (LEDs) on either side in order to designate button zones, provide additional feedback and the like.
• As previously mentioned, the input devices described herein may be integrated into an electronic device or they may be separate stand alone devices.FIGS. 7 and 8 show some implementations of aninput device700 integrated into an electronic device. InFIG. 7, theinput device700 is incorporated into amedia player702. InFIG. 8, theinput device700 is incorporated into alaptop computer704.FIGS. 9 and 10, on the other hand, show some implementations of theinput device700 as a stand alone unit. InFIG. 9, theinput device700 is a peripheral device that is connected to adesktop computer706. InFIG. 10, theinput device700 is a remote control that wirelessly connects to adocking station708 with amedia player710 docked therein. It should be noted, however, that the remote control can also be configured to interact with the media player (or other electronic device) directly thereby eliminating the need for a docking station. An example of a docking station for a media player can be found in U.S. patent application Ser. No. 10/423,490, entitled “MEDIA PLAYER SYSTEM,” filed Apr. 25, 2003, which is hereby incorporated by reference. It should be noted that these particular embodiments are not a limitation and that many other devices and configurations may be used.
• Referring back toFIG. 7, themedia player702 will be discussed in greater detail. The term “media player” generally refers to computing devices that may be dedicated to processing media such as audio, video or other images, as for example, music players, game players, video players, video recorders, cameras, and the like. In some cases, the media players contain single functionality (e.g., a media player dedicated to playing music) and in other cases the media players contain multiple functionality (e.g., a media player that plays music, displays video, stores pictures and the like). In either case, these devices are generally portable so as to allow a user to listen to music, play games or video, record video or take pictures wherever the user travels.
• In one embodiment, the media player is a handheld device that is sized for placement into a pocket of the user. By being pocket sized, the user does not have to directly carry the device and therefore the device can be taken almost anywhere the user travels (e.g., the user is not limited by carrying a large, bulky and often heavy device, as in a laptop or notebook computer). For example, in the case of a music player, a user may use the device while working out at the gym. In case of a camera, a user may use the device while mountain climbing. In the case of a game player, the user may use the device while traveling in a car. Furthermore, the device may be operated by the user's hands. No reference surface, such as a desktop, is needed. In the illustrated embodiment, themedia player702 is a pocket sized hand held MP3 music player that allows a user to store a large collection of music (e.g., in some cases up to 4,000 CD-quality songs). By way of example, the MP3 music player may correspond to the iPod® brand MP3 player manufactured by Apple Computer, Inc. of Cupertino, Calif. Although used primarily for storing and playing music, the MP3 music player shown herein may also include additional functionality such as storing a calendar and phone lists, storing and playing games, storing photos and the like. In fact, in some cases, it may act as a highly transportable storage device.
• As shown inFIG. 7, themedia player702 includes ahousing722 that encloses various electrical components (including integrated circuit chips and other circuitry) internally to provide computing operations for themedia player702. In addition, thehousing722 may also define the shape or form of themedia player702. That is, the contour of thehousing722 may embody the outward physical appearance of themedia player702. The integrated circuit chips and other circuitry contained within thehousing722 may include a microprocessor (e.g., CPU), memory (e.g., ROM, RAM), a power supply (e.g., battery), a circuit board, a hard drive, other memory (e.g., flash) and/or various input/output (I/O) support circuitry. The electrical components may also include components for inputting or outputting music or sound such as a microphone, amplifier and a digital signal processor (DSP). The electrical components may also include components for capturing images such as image sensors (e.g., charge coupled device (CCD) or complimentary metal-oxide semiconductor (CMOS)) or optics (e.g., lenses, splitters, filters).
• In the illustrated embodiment, themedia player702 includes a hard drive thereby giving the media player massive storage capacity. For example, a 20 GB hard drive can store up to 4000 songs or about 266 hours of music. In contrast, flash-based media players on average store up to 128 MB, or about two hours, of music. The hard drive capacity may be widely varied (e.g., 5, 10, 20 GB, etc.). In addition to the hard drive, themedia player702 shown herein also includes a battery such as a rechargeable lithium polymer battery. These types of batteries are capable of offering about 10 hours of continuous playtime to the media player.
• Themedia player702 also includes adisplay screen724 and related circuitry. Thedisplay screen724 is used to display a graphical user interface as well as other information to the user (e.g., text, objects, graphics). By way of example, thedisplay screen724 may be a liquid crystal display (LCD). In one particular embodiment, the display screen corresponds to a 160-by-128-pixel high-resolution display, with a white LED backlight to give clear visibility in daylight as well as low-light conditions. As shown, thedisplay screen724 is visible to a user of themedia player702 through anopening725 in thehousing722 and through atransparent wall726 that is disposed in front of theopening725. Although transparent, thetransparent wall726 may be considered part of thehousing722 since it helps to define the shape or form of themedia player702.
• Themedia player702 also includes thetouch pad700 such as any of those previously described. Thetouch pad700 generally consists of a touchable outer surface731 for receiving a finger for manipulation on the touch pad730. Although not shown inFIG. 7, beneath the touchable outer surface731 is a sensor arrangement. The sensor arrangement includes a plurality of sensors that may be configured to activate as the finger sits on, taps on or passes over them. In the simplest case, an electrical signal is produced each time the finger is positioned over a sensor. The number of signals in a given time frame may indicate location, direction, speed and acceleration of the finger on the touch pad, i.e., the more signals, the more the user moved his or her finger. In most cases, the signals are monitored by an electronic interface that converts the number, combination and frequency of the signals into location, direction, speed and acceleration information. This information may then be used by themedia player702 to perform the desired control function on thedisplay screen724. For example, a user may easily scroll through a list of songs by swirling the finger around thetouch pad700.
• In addition to above, the touch pad may also include one or more movable buttons zones A-D as well as a center button E. The button zones are configured to provide one or more dedicated control functions for making selections or issuing commands associated with operating themedia player702. By way of example, in the case of an MP3 music player, the button functions may be associated with opening a menu, playing a song, fast forwarding a song, seeking through a menu, making selections and the like. In most cases, the button functions are implemented via a mechanical clicking action.
• The position of thetouch pad700 relative to thehousing722 may be widely varied. For example, thetouch pad700 may be placed at any external surface (e.g., top, side, front, or back) of thehousing722 that is accessible to a user during manipulation of themedia player702. In most cases, the touch sensitive surface731 of thetouch pad700 is completely exposed to the user. In the embodiment illustrated inFIG. 7, thetouch pad700 is located in a lower front area of thehousing722. Furthermore, thetouch pad700 may be recessed below, level with, or extend above the surface of thehousing722. In the embodiment illustrated inFIG. 7, the touch sensitive surface731 of thetouch pad700 is substantially flush with the external surface of thehousing722.
• The shape of thetouch pad700 may also be widely varied. Although shown as circular, the touch pad may also be square, rectangular, triangular, and the like. More particularly, the touch pad is annular, i.e., shaped like or forming a ring. As such, the inner and outer perimeter of the touch pad defines the working boundary of the touch pad.
• Themedia player702 may also include ahold switch734. Thehold switch734 is configured to activate or deactivate the touch pad and/or buttons associated therewith. This is generally done to prevent unwanted commands by the touch pad and/or buttons, as for example, when the media player is stored inside a user's pocket. When deactivated, signals from the buttons and/or touch pad are not sent or are disregarded by the media player. When activated, signals from the buttons and/or touch pad are sent and therefore received and processed by the media player.
• Moreover, themedia player702 may also include one ormore headphone jacks736 and one ormore data ports738. Theheadphone jack736 is capable of receiving a headphone connector associated with headphones configured for listening to sound being outputted by themedia device702. Thedata port738, on the other hand, is capable of receiving a data connector/cable assembly configured for transmitting and receiving data to and from a host device such as a general purpose computer (e.g., desktop computer, portable computer). By way of example, thedata port738 may be used to upload or download audio, video and other images to and from themedia device702. For example, the data port may be used to download songs and play lists, audio books, ebooks, photos, and the like into the storage mechanism of the media player.
• Thedata port738 may be widely varied. For example, the data port may be a PS/2 port, a serial port, a parallel port, a USB port, a Firewire port and/or the like. In some cases, thedata port738 may be a radio frequency (RF) link or optical infrared (IR) link to eliminate the need for a cable. Although not shown inFIG. 7, themedia player702 may also include a power port that receives a power connector/cable assembly configured for delivering power to themedia player702. In some cases, thedata port738 may serve as both a data and power port. In the illustrated embodiment, thedata port738 is a Firewire port having both data and power capabilities.
• Although only one data port is shown, it should be noted that this is not a limitation and that multiple data ports may be incorporated into the media player. In a similar vein, the data port may include multiple data functionality, i.e., integrating the functionality of multiple data ports into a single data port. Furthermore, it should be noted that the position of the hold switch, headphone jack and data port on the housing may be widely varied. That is, they are not limited to the positions shown inFIG. 7. They may be positioned almost anywhere on the housing (e.g., front, back, sides, top, bottom). For example, the data port may be positioned on the top surface of the housing rather than the bottom surface as shown.
• FIGS. 11 and 12 are diagrams showing the installation of aninput device750 into amedia player752. By way of example, theinput device750 may correspond to any of those previously described and themedia player752 may correspond to the one shown inFIG. 7. As shown, theinput device750 includes ahousing754 and atouch pad assembly756. Themedia player752 includes a shell orenclosure758. Thefront wall760 of theshell758 includes anopening762 for allowing access to thetouch pad assembly756 when theinput device750 is introduced into themedia player752. The inner side of thefront wall760 includes a channel or track764 for receiving theinput device750 inside theshell758 of themedia player752. Thechannel764 is configured to receive the edges of thehousing754 of theinput device750 so that theinput device750 can be slid into its desired place within theshell758. The shape of the channel has a shape that generally coincides with the shape of thehousing754. During assembly, the circuit board766 of thetouch pad assembly756 is aligned with theopening762 and acosmetic disc768 andbutton cap770 are mounted onto the top side of the circuit board766. As shown, thecosmetic disc768 has a shape that generally coincides with theopening762. The input device may be held within the channel via a retaining mechanism such as screws, snaps, adhesives, press fit mechanisms, crush ribs and the like.
• FIG. 13 is a simplified block diagram of aremote control780 incorporating aninput device782 therein. By way of example, theinput device782 may correspond to any of the previously described input devices. In this particular embodiment, theinput device782 corresponds to the input device shown inFIGS. 5 and 6, thus the input device includes atouch pad784 and a plurality ofswitches786. Thetouch pad784 andswitches786 are operatively coupled to awireless transmitter788. Thewireless transmitter788 is configured to transmit information over a wireless communication link so that an electronic device that has receiving capabilities may receive the information over the wireless communication link. Thewireless transmitter788 may be widely varied. For example, it may be based on wireless technologies such as FM, RF, Bluetooth, 802.11 UWB (ultra wide band), IR, magnetic link (induction) and/or the like. In the illustrated embodiment, thewireless transmitter788 is based on IR. IR generally refers to wireless technologies that convey data through infrared radiation. As such, thewireless transmitter788 generally includes anIR controller790. TheIR controller790 takes the information reported from thetouch pad784 andswitches786 and converts this information into infrared radiation, as for example using alight emitting diode792.
• Although the various exemplary embodiments have been fully described with reference to the accompanying drawings, it is to be noted that various changes and modifications will become apparent to those skilled in the art. Such changes and modifications are to be understood as being included within the scope of the subject matter defined by the appended claims.

Claims (2)

1. A device comprising:

a moveable platform comprising a location detector configured to detect the location of an object relative to the platform and configured to move between a first position and at least a second position,

a flexible member centrally positioned relative to the platform and configured to bias the platform toward the first position, and

a movement detector configured to detect movement of the platform.

2-27. (canceled)

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