CN218074996U - Terminal device - Google Patents

Abstract

The utility model provides a terminal device, which comprises a rear cover component (10) and at least two PPG units arranged on one side of the rear cover component (10); the PPG unit comprises: at least one light emitting unit (20) and at least one light detector (30), wherein the distance between the center of the light emitting unit (20) and the center of the adjacent light detector (30) is 3-4mm. The terminal equipment sets the range of the center distance between the light-emitting unit and the optical detector within the range of 3-4mm, so that the light-isolating effect between the light-emitting unit and the optical detector is ensured, and the distance between the light-emitting unit and the optical detector is smaller, thereby being beneficial to improving the measurement accuracy of physiological parameters and reducing the power consumption of the equipment.

Description

Terminal device

Technical Field

The utility model relates to a wearable equipment technical field especially relates to a terminal equipment.

Background

The photoplethysmography (PPG) is a method of emitting light signals with a certain wavelength into human tissues and calculating human physiological parameters such as heart rate and blood oxygen through the change of reflected or transmitted light intensity.

PPG sensors comprise a light detector and a light emitting unit, which are both transmissive and reflective, and PPG sensors applied on wearable devices are typically reflective. The working principle of the reflection type PPG sensor is as follows: after light emitted by the light-emitting unit is reflected by human blood and tissues, light reflected by the human blood and the tissues is received by the light detector, and human physiological parameters are measured by detecting the difference of the intensity of reflected light absorbed by the human blood and the tissues.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a terminal device, including back cover part and at least two PPG units that set up in one side of the said back cover part; the PPG unit comprises: the light emitting device comprises at least one light emitting unit and at least one light detector, wherein the distance between the center of the light emitting unit and the center of the adjacent light detector ranges from 3mm to 4mm.

The utility model discloses in, terminal equipment can include the casing, and the back cover part is at least partly of casing, is provided with the cavity that holds electron device in the casing, and the PPG sensor sets up in this cavity. The PPG sensor comprises at least two PPG units, each comprising one or more light emitting units and one or more photodetectors.

The utility model discloses terminal equipment sets up the scope of luminescence unit and light detector's centre-to-centre spacing at 3-4 mm's within range, the enforceability of luminescence unit and light detector installation has both been guaranteed, it has sufficient light isolation effect to have guaranteed again between the two, be favorable to improving the degree of accuracy of physiological parameter measurement, luminescence unit and light detector's distance is less simultaneously, thereby the light that luminescence unit sent is through human blood and tissue reflection back, the propagation path who receives by light detector reduces again, thereby reduce and detect the consumption, be favorable to improving terminal equipment's duration.

In some embodiments, the PPG unit comprises one light-emitting unit and a plurality of photodetectors, which are symmetrically distributed about the light-emitting unit.

In some embodiments, the at least two PPG units are symmetrically distributed over the back cover part.

In some embodiments, the plurality of photodetectors in the at least two PPG units are disposed around the outside of the plurality of light-emitting units in the at least two PPG units,

the distance between the light-emitting unit and the light detector in the same PPG unit is smaller than the distance between the light-emitting unit and the light detector in different groups; alternatively, the centers of the plurality of photodetectors in the at least two PPG units enclose a rectangular area, and the plurality of light-emitting units in the at least two PPG units are arranged on an axis within the rectangular area.

In some embodiments, the back cover member has a plurality of light transmissive areas thereon, the light transmissive areas having a size in the range of 2-3mm.

The light transmitting area allows a light signal emitted from a light emitting unit of the PPG sensor to pass through to be incident on the human body, or allows a light signal returned from the human body to pass through to be detected by a photodetector of the PPG sensor.

In some embodiments, the plurality of light-transmissive regions may include at least one first light-transmissive region corresponding to a light-emitting unit in the PPG sensor that allows light signals emitted from the light-emitting unit of the PPG sensor to pass through to be incident on the human body, and at least one second light-transmissive region corresponding to a light detector in the PPG sensor that allows light signals returned from the human body to pass through to reach the light detector of the PPG sensor. The spatial arrangement of the first and second light-transmitting regions may be adapted to the spatial arrangement between the light-emitting unit and the light detector.

In some embodiments, the first light-transmitting region may inhibit light returning from the human body from passing therethrough, and the second light-transmitting region may inhibit light emitted from the light-emitting unit from passing therethrough.

In some embodiments, the rear cover member has at least one first light-transmissive region disposed corresponding to a plurality of light-emitting cells of the at least two PPG cells, at least one second light-transmissive region disposed corresponding to a plurality of light-detectors of the at least two PPG cells, and at least one light-blocking region thereon.

The light shielding region is used for blocking light signal transmission between the first light transmission region and the second light transmission region so as to avoid light crosstalk between the light emitting unit and the light detector.

In some embodiments, the light-shielding region is provided with a retaining wall structure, wherein the retaining wall structure surrounds the light-emitting unit or surrounds the light detector.

The retaining wall structure may be used to block light signals emitted by the light emitting unit from passing through to reach the light detector.

The retaining wall structure may extend from the substrate of the PPG sensor to the back cover assembly and surround at least a part of the light emitting unit or at least a part of the light detector in an area on the back cover assembly.

In some embodiments, a plurality of retaining wall structures may be disposed only at the periphery of the plurality of light emitting units to prevent the light signals emitted by the light emitting units from overflowing to the light detector. Alternatively, a plurality of dam structures may be provided only at the periphery of the plurality of photo detectors to block the light signals emitted from the light emitting unit from passing through, which can reduce the complexity of the device structure and the cost of the device compared to a case where dam structures are provided at the periphery of both the light emitting unit and the photo detectors.

In some embodiments, the light-blocking area is coated with a light-blocking material.

The light blocking material may be ink or other material.

In some embodiments, a light shielding material may be coated on the periphery of both the first light transmission region and the second light transmission region to ensure better light shielding performance. For example, a light shielding material is coated on the bottom wall and the side wall of the first light transmission region and/or the second light transmission region.

In some embodiments, the first light-transmissive region includes a first light-transmissive hole and a light-transmissive lens disposed over the first light-transmissive hole.

For example, a through hole can be formed in the position, corresponding to the first light-transmitting area, of the rear cover, the light-transmitting lens is arranged on the through hole, a step surface can be further arranged in the through hole, and the light-transmitting lens is arranged on the step surface to provide good supporting force for the light-transmitting lens through the step surface, so that the light-transmitting lens is prevented from falling off in the using process.

The second light-transmitting area comprises a second light-transmitting hole and a light-transmitting lens arranged on the second light-transmitting hole.

The second light hole and the corresponding lens can be implemented similarly to the first light hole and the corresponding lens.

In some embodiments, the number of the first light-transmitting areas is one, and a plurality of the light-emitting units in the PPG sensor are disposed at corresponding positions of the first light-transmitting areas.

In some embodiments, the number of the second light-transmitting areas is one, and the plurality of photodetectors in the PPG sensor are disposed within corresponding areas of the photodetector light-transmitting areas.

For example, the second light-transmitting region is an annular region, such as a rectangle, circle, oval, or other shape, disposed around the first light-transmitting region.

Like this, through setting up a first printing opacity region and a second printing opacity region, can reduce the quantity of punching on the back of the body lid, improve equipment outward appearance uniformity.

In some embodiments, the first light-transmitting area and the second light-transmitting area are further provided with fresnel patterns thereon.

In some embodiments, the back cover member may include a back cover, in which case the back cover may be perforated to achieve the first and second light transmissive regions.

In other embodiments, the back cover member may include an integral light transmissive body and a support, in which case a light blocking area may be provided on the support, for example coated with a light blocking material, to achieve the light blocking area.

In one example, the unitary light transmissive body may be made of a glass material.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of a PPG sensor in an embodiment of the invention;

fig. 2 is an exploded view of a rear cover assembly according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a PPG sensor in another embodiment of the invention;

fig. 4 is a schematic diagram of a PPG sensor in another embodiment of the invention;

fig. 5 is a schematic top view of the terminal device of the present invention;

fig. 6 is a sectional view of the terminal device of fig. 5.

Reference numerals:

10-a back cover member; 11-a first light transmitting area; 12-a second light transmitting area;

20-a light emitting unit; 21-a first light transmissive lens;

30-a light detector; 31-a second light-transmitting lens;

40-retaining wall structure.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The present embodiment provides a terminal device, for example, a mobile phone, a tablet computer, a wearable device, and the like, where the wearable device may be a wrist-worn device such as a smart watch and a smart bracelet, may also be a head-worn device such as an earphone and smart glasses, and may also be a finger-worn device such as a ring, and the like, which is not limited herein.

The inventor of the present application finds, through research, that the power consumption of the terminal device is related to the distance between the light emitting unit and the light detector, and based on this, the inventor of the present application enables the power consumption of the terminal device to be reduced by adjusting the distance between the light emitting unit and the light detector.

The Light detector may be a Photodiode (PD) or other type of Light detector, and the Light Emitting unit may be a Light Emitting Diode (LED) or other type of Light source.

The light emitting unit can emit light signals with certain wavelengths, such as green light, red light, infrared light and the like, and the light signals are transmitted to a human body, then return to the terminal equipment and are received by the light detector.

The terminal device can also comprise a processor, and the processor obtains the physiological parameter measurement result of the human body according to the optical signal received by the optical detector.

In some embodiments, the light detector includes a photodiode that can convert a received optical signal into an electrical signal and output the electrical signal to the processor.

In some embodiments, the processor may include a PPG analog front end AFE, which may receive and process the electrical signal output by the photodiode to obtain and output a PPG signal, where the PPG signal may be a digital signal and contains an effective physical quantity that may characterize a physiological parameter of a human body. The controller can receive a PPG signal output by the PPG analog front end and obtain a physiological parameter measurement result based on the PPG signal and a corresponding physiological parameter model.

In some embodiments, referring to fig. 1 and 2, the terminal device comprises aback cover part 10 and at least two PPG units arranged at one side of theback cover part 10; the PPG unit comprises: at least onelight emitting unit 20 and at least onelight detector 30, the distance between the center of alight emitting unit 20 and the center of an adjacentlight detector 30 being in the range of 3-4mm.

The terminal device may comprise aback cover member 10, a receiving cavity and a PPG sensor located within the receiving cavity. The PPG sensor comprises a substrate and at least two PPG units arranged on the substrate, wherein the center-to-center distance between the light-emittingunit 20 and the adjacentlight detector 30 in each PPG unit is 3-4mm, and the specific center-to-center distance value can be finely adjusted according to the number and arrangement of the light-emittingunits 20 and thelight detectors 30. The substrate may be a Circuit board, such as a Printed Circuit board (PBC) or a Flexible Printed Circuit (FPC), and the like, which is not limited herein.

Thelight detector 30 adjacent to thelight emitting unit 20 may be the light detector closest to the light emitting unit, or the light emitting unit adjacent to the light detector may be the light emitting unit closest to the light detector, and the number of the light detectors adjacent to the light emitting unit may be two or more. For example, each PPG unit includes at least one light-emitting unit and at least two photodetectors corresponding to each light-emitting unit, and the photodetector corresponding to the light-emitting unit may refer to a photodetector adjacent to the light-emitting unit, but is not limited herein.

In the above size range, the installation feasibility of the light-emittingunit 20 and thelight detector 30 is ensured, and the sufficient light-isolating effect is ensured between the light-emittingunit 20 and thelight detector 30, so that the accuracy of physiological parameter measurement is improved, and meanwhile, the distance between the light-emittingunit 20 and thelight detector 30 is smaller, so that the path received by thelight detector 30 is reduced after the light emitted by the light-emittingunit 20 is reflected by blood and tissues of a human body, and the purpose of reducing the detection power consumption is achieved.

The PPG sensor provided by the present invention will be described in detail below.

The PPG sensor comprises at least two PPG units, each of which comprises one or more light-emitting units and one or more photodetectors, the number of light-emitting units comprised by each PPG unit may be equal or unequal, and the number of photodetectors comprised by each PPG unit may also be equal or unequal. In some embodiments, different light emitting units may emit light signals having the same wavelength, e.g., may each emit green light, or different light emitting units may emit light signals having different wavelengths, e.g., a portion of the light emitting units emit green light and a portion of the light emitting units emit blue, red, or infrared light.

In some embodiments, the PPG unit comprises onelight emitting unit 20 and a plurality ofphoto detectors 30, the plurality ofphoto detectors 30 being symmetrically distributed about thelight emitting unit 20. For example, the PPG unit comprises 1 light emitting unit and 2 photo detectors, wherein the central positions of these three components form an isosceles triangle, wherein the light emitting units are located at the vertices of the isosceles triangle. For another example, the light emitting unit is located at the center of a circle, and the plurality of light detectors are arranged on a circumference around the light emitting unit.

In some embodiments, the terminal device comprises at least two PPG units, which are symmetrically distributed. This arrangement can improve the aesthetic appearance of the terminal device. For example, the PPG sensor comprises two PPG units arranged symmetrically about a central axis of the substrate, one of which is a mirror image of the other of the PPG units about the central axis, as an example.

In some embodiments, referring to fig. 1 and 3, all thelight detectors 30 surround all thelight emitting units 20, that is, thelight emitting units 20 in all the PPG units are disposed in the middle area, and thelight detectors 30 in all the PPG units are disposed at the periphery, so that the adjacentlight detectors 30 are spaced apart more, thereby reducing the mutual influence and improving the detection accuracy.

In other embodiments, referring to fig. 4, in the first direction, the plurality of light-emittingunits 20 are located in the middle region of the plurality of light-detectingunits 30, and in the second direction, the plurality of light-emittingunits 20 are located in the peripheral region of the plurality of light-detectingunits 30, so as to avoid interference caused by the light signals emitted by the plurality of light-emittingunits 20, thereby facilitating the plurality of light-emitting units to operate in parallel, i.e., to activate and emit the light signals at the same time. Furthermore, this arrangement allows the plurality oflight detectors 30 to be located at a small distance from any one of thelight emitting units 20, for example, less than a certain threshold, thereby facilitating an increase in the number of measurement channels.

In some embodiments, the plurality of light emitting cells and the plurality of photodetectors may form a symmetrical structure.

For example, the plurality oflight detectors 30 in the at least two PPG units enclose a rectangular area in their centers, and the plurality of light emittingunits 20 in the at least two PPG units are arranged on a central axis within the rectangular area.

For another example, referring to fig. 5, the plurality oflight detectors 30 and the plurality of light emittingunits 20 in the ppg sensor are distributed in a circle. As an example, the centers of the plurality oflight detectors 30 and the centers of the plurality of light emittingunits 20 in the PPG sensor are located on the same circumference, in this case, the plurality oflight detectors 30 and the plurality of light emittingunits 20 may be distributed at equal intervals, or the distance between thelight detector 30 and thelight emitting unit 20 in the same PPG unit in the plurality oflight detectors 30 may be greater than the distance between thelight detector 30 and thelight emitting unit 20 in different PPG units, so that thelight emitting unit 20 and thelight detector 30 in the same PPG unit form a measurement channel, and signal interference between different PPG units is avoided.

In some embodiments, other components may be disposed in the center of the circular area to improve the utilization of equipment space. For example, a reminding unit is arranged in the central area of the circular area, and the reminding unit can be used for giving an alarm to a user, such as adjusting wearing tightness or insufficient electric quantity, and in some examples, the reminding unit can comprise a light-emitting element, and the light-emitting element can also be reused as the light-emitting element of the PPG sensor, so that the miniaturization design of the device is facilitated. As another example, thelight detector 30 may be disposed in the central region of the circular region, and thelight detector 30 may be shared by at least two PPG units to increase the number of measurement channels per PPG unit and improve measurement accuracy. For another example, a wireless charging unit, such as a wireless charging coil, may be disposed in a central area of the circular area. For another example, an electrode element, such as an ECG electrode, a charging electrode, or a body temperature measuring electrode, etc., may be disposed at the center of the circular region, which is not limited herein.

In other embodiments, the distance between thelight detector 30 and thelight emitting unit 20 in the same PPG unit is smaller than the distance between thelight detector 30 and the light detector in another PPG unit, thereby avoiding signal interference in different PPG units.

In some embodiments, as shown in fig. 2, a plurality of light-transmitting regions are further provided on the back cover member, the light-transmitting regions allowing light signals emitted from the light-emitting unit to pass therethrough to be incident on the human body or allowing light signals returned from the human body to pass therethrough to reach the light detector.

In some embodiments, theback cover member 10 has a first light-transmittingregion 11 disposed corresponding to the plurality of light-emittingunits 20 in the at least two PPG units, a second light-transmittingregion 12 disposed corresponding to the plurality of light-detectors 30 in the at least two PPG units, and a light-blocking region thereon. The light-shielding region is located between the first light-transmitting region and the second light-transmitting region, so that light crosstalk between the first light-transmitting region and the second light-transmitting region is avoided, mutual noninterference is guaranteed, and detection accuracy is improved.

Specifically, thelight emitting unit 20 is correspondingly disposed in the firstlight transmitting region 11, and thelight detector 30 is correspondingly disposed in the secondlight transmitting region 12. In some embodiments, the light blocking area of theback cover member 10 is coated with a light blocking material, such as ink, etc., and the first and secondlight transmissive areas 11 and 12 are not coated with the light blocking material, thereby achieving optical isolation between the first and second light transmissive areas.

In other embodiments, the light-shielding region is provided with a retainingwall structure 40, the retainingwall structure 40 is disposed to surround the light-emittingunit 20 or surround thelight detector 30, and the retainingwall structure 40 can effectively prevent light crosstalk between thelight detector 30 and the light-emittingunit 20. Specifically, the retainingwall structure 40 may be made of black rubber, but is not limited thereto.

In other embodiments, the retainingwall structure 40 and the light shielding material can be disposed simultaneously to achieve a better light shielding effect.

In some embodiments, referring to the example shown in fig. 3, the light-transmissive region includes a light-transmissive hole disposed on the back cover member and a light-transmissive lens disposed on the light-transmissive hole. For example, the first light-transmittingarea 11 includes a first light-transmitting hole and a light-transmittinglens 21 disposed on the first light-transmitting hole, and a light-blocking layer is disposed on an inner wall of the first light-transmitting hole. The light-isolating layer is arranged on the inner wall of the first light-transmitting hole, so that light of the light-emittingunit 20 can be effectively prevented from being diffused to the second light-transmitting area corresponding to theoptical detector 30, and the detection accuracy of the terminal device is improved.

In some embodiments, differentlight emitting units 20 in the PPG sensor may correspond to different first light-transmitting holes or first light-transmitting areas, for example, as shown in the example of fig. 4, the number of light emittingunits 20 is equal to the number of first light-transmitting holes or first light-transmitting areas, so as to avoid interference between differentlight emitting units 20, which is beneficial for achieving parallel operation between multiple light emittingunits 20. Alternatively, the PPG unit includes 1 light-emitting unit, and light-emitting units closer to each other in different PPG units may correspond to the same first light-transmitting region, and light-emitting units farther from each other may correspond to different first light-transmitting regions. Alternatively, the PPG unit includes two or more light-emitting units, two or more light-emitting units in the same PPG unit of the plurality of light-emittingunits 20 may correspond to the same first light-transmitting region, and two or more light-emitting units in different PPG units may correspond to different first light-transmitting units. At this time, the number of the first light transmission regions may be less than the number of the light emitting units, but is not limited thereto.

In other embodiments, all thelight emitting units 20 in the PPG sensor may correspond to the same first light-transmitting area, that is, only one light-transmitting hole needs to be provided on theback cover member 10, and as shown in fig. 3, a racetrack-shaped light-transmitting hole may be provided on theback cover member 10, so as to reduce the number of holes on theback cover member 10, reduce the difficulty of processing the device, and improve the uniformity of the appearance of the device.

In some embodiments, the outer surface of thelight transmissive lens 21 of the first light transmissive region may also be equipped with a fresnel film so that the internal structure is not readily visible on the exterior of the terminal device to improve the device aesthetics.

In some embodiments, the second light-transmittingarea 12 includes a second light-transmitting hole disposed on theback cover member 10 and a light-transmittinglens 31 disposed on the second light-transmitting hole, and a light-blocking layer is disposed on an inner wall of the second light-transmitting hole, so that light emitted from the light-emittingunit 20 can be effectively prevented from being directly transmitted to the light detector or light returned from the human body can be prevented from being diffused to an area where the light-emitting unit is located by disposing the light-blocking layer on the inner wall of the second light-transmitting hole, thereby improving detection accuracy of the terminal device.

In some embodiments,different photodetectors 30 may correspond to different second light-transmissive holes or second light-transmissive regions, e.g., in the example shown in fig. 3, the number ofphotodetectors 30 is equal to the number of second light-transmissive holes or second light-transmissive regions, ormultiple photodetectors 30 in the same PPG unit may correspond to the same second light-transmissive region, whilemultiple photodetectors 30 in different PPG units correspond to different second light-transmissive regions. Alternatively, in the example shown in fig. 4, a plurality ofphotodetectors 30 symmetrically disposed may correspond to the same second light-transmitting region. In this way, interference betweendifferent photo detectors 30 in the same PPG unit can be avoided.

In other embodiments, all of thelight detectors 30 may correspond to the same second light-transmitting hole or second light-transmitting area, for example, a second racetrack-shaped light-transmitting hole is disposed at the periphery of the first racetrack-shaped light-transmitting hole shown in fig. 3, so that only two light-transmitting holes can be disposed on theback cover member 10, further reducing the complexity of the device processing and improving the uniformity of the device appearance.

In some embodiments, the outer surface of thelight transmissive lens 31 of the second light transmissive region may also be equipped with a fresnel film so that the internal structure is not readily visible on the exterior of the terminal device to improve the device appearance consistency.

In some embodiments, the light-transmitting hole is provided with a step, and the light-emitting unit or the light detector is arranged on the surface of the step. The side wall and the step surface of the step are coated with light-blocking materials. Referring to the example shown in fig. 3, the first light-transmitting hole is a racetrack-shaped stepped hole, and two light-emittingunits 20 are disposed in corresponding areas of the racetrack-shaped stepped hole; the bottom wall and the side wall of the runway-shaped step hole are both provided with light-isolating layers. The shape of the first light-transmitting area is not limited thereto, and those skilled in the art can change the specific implementation of the first light-transmitting area according to the concept of the present embodiment, and the above technical effects can be achieved as well.

For example, referring to fig. 5 and 6, the first light-transmitting areas are circular stepped holes, one light-emittingunit 20 is correspondingly disposed in a corresponding area of each circular stepped hole, and the bottom wall and the side wall of each circular stepped hole are provided with light-blocking layers. By arranging the light-isolating layer on the inner wall of the first light-transmitting hole, light of the light-emittingunit 20 can be effectively prevented from being diffused to theoptical detector 30, so that the detection accuracy of the terminal device is improved.

Referring to the example shown in fig. 4, a step is provided in the second light transmission hole, and the secondlight transmission lens 31 is provided on the surface of the step. By arranging the light-isolating layer on the inner wall of the second light-transmitting hole, the optical crosstalk between theoptical detector 30 and the light-emittingunit 20 can be effectively avoided, and the detection accuracy of the terminal equipment is improved.

In some examples, the second light-transmitting hole is a circular stepped hole, and the bottom wall and the side wall of the circular stepped hole are both provided with light-blocking layers.

The utility model discloses the inventor discovers, the size of first light trap can influence the intensity that light emittingunit 20 sent light, if this size is too big, then can cause energy loss, if this size is less then can cause detection accuracy to reduce. In some embodiments, the size of the first light-transmitting hole or the first light-transmitting area is in the range of 2-3mm, for example, 2-3mm in diameter, which can ensure the detection accuracy and reduce the power consumption to the maximum.

Similarly, the size of the second light-transmitting hole or the second light-transmitting area determines the ability of thelight detector 30 to detect the light signal, and if the size is large, energy loss is caused, and if the size is small, the detection accuracy is affected. In some embodiments, the size of the second light-transmitting hole or the second light-transmitting area is in the range of 2-3mm, for example, 2-3mm in diameter, which can ensure the detection accuracy and reduce the power consumption to the maximum extent.

In some embodiments, the light-blocking layer is a black ink screen which is coated, has a good light-blocking effect, is low in cost and is convenient to coat.

Theback cover part 10 is a bottom case of the terminal device, which in some embodiments may be a wrist-worn device, and accordingly the outer surface of theback cover part 10 is adapted to contact the skin of a human wrist when the user wears the terminal device.

In some embodiments, theback cover part 10 may include a back cover, and the light-transmitting hole may be opened in the back cover.

In other embodiments, theback cover part 10 may include a back cover and a support connected to the back cover, for example, a support connected to the back cover by glue or other connection method, and the support is provided with the light-transmitting hole. As one example, the rear cover may have a unitary structure, and the rear cover may be made of glass or other types of light-transmissive materials. The support can be made of light-tight material, and a plurality of light holes are arranged on the support. Like this, can keep the uniformity of back lid, and can with the PPG sensor looks adaptation of multiple different frameworks, only need to change the support that corresponds can to improve equipment component's compatibility and reduce equipment cost.

The utility model provides a terminal equipment can be used for the measurement of various physiological parameters, for example one or more such as rhythm of the heart, blood oxygen, body temperature, blood pressure, blood sugar.

In some embodiments, multiple light-emittingunits 20 of at least two PPG units in the PPG sensor may be operated simultaneously in parallel, e.g. at a first instant of time, a first light-emitting unit and a second light-emitting unit of the multiple light-emittingunits 20 are controlled simultaneously to emit light signals, wherein the wavelengths of the light signals emitted by the different light-emitting units may be the same or different. Alternatively, the plurality of light-emittingunits 20 may also be operated in a time-sharing sequence, for example, a first light-emitting unit of the plurality of light-emittingunits 20 is controlled to emit a light signal of a first wavelength at a first time, and a second light-emitting unit is controlled to be silent. The second light emitting unit is controlled to emit the optical signal of the second wavelength at the second moment in time, while the first light emitting unit is controlled to be silent, wherein the first wavelength and the second wavelength may be the same or different.

Furthermore, in some embodiments of the present invention, each PPG unit may be configured as a measurement channel, obtaining 1 PPG signal, for example, the PPG analog front end obtains electrical signals output by at least two photodetectors in the PPG unit, and obtains the PPG signal based on the electrical signals output by the at least two photodetectors, as an example, a target electrical signal may be selected from the electrical signals output by the at least two photodetectors based on parameters of the electrical signals output by the at least two photodetectors, and the PPG signal is obtained by processing the target electrical signal, or interference cancellation is performed on the target electrical signal by using electrical signals output by other photodetectors, so as to obtain the PPG signal. As another example, the weights of the electrical signals output by the at least two photodetectors may be determined based on parameters of the electrical signals, and the PPG signals may be obtained by processing the electrical signals based on the weights of the electrical signals.

In other embodiments, each photodetector in the PPG unit may be used as a measurement channel, and accordingly, the PPG analog front end may obtain and output a PPG signal corresponding to each photodetector according to the electrical signal output by the photodetector.

After receiving the multiple PPG signals corresponding to the multiple measurement channels, the controller may obtain a physiological parameter measurement result based on the multiple PPG signals and the corresponding physiological parameter calculation model.

In some embodiments, the terminal device of the above embodiments may have a plurality of measurement modes, so as to respectively perform different types of physiological parameter measurements. For example: at least a first measurement mode for measuring a first physiological parameter and a second measurement mode for measuring a second physiological parameter may be configured, the first physiological parameter being different from the second physiological parameter, e.g. the first physiological parameter is heart rate and the second physiological parameter is blood oxygen, blood pressure, body temperature or blood glucose, etc. Alternatively, the first physiological parameter is blood pressure, and the second physiological parameter is blood oxygen, body temperature, heart rate or blood sugar, etc., which are not limited herein.

In some embodiments, in the first and second measurement modes, at least one of the following parameters of the PPG sensor is different: the configuration of the light-emitting unit in an operating state, the wavelength of the optical signal, the optical detector in an operating state and the measurement channel.

In one example, in the first measurement mode, the light emitting unit and the at least onelight detector 30 in the same PPG unit are configured to cooperate as one measurement channel. At this time, a certain light emitting unit in the PPG unit emits an optical signal with a specific wavelength, each photodetector in the PPG unit can receive the returned optical signal and process the optical signal to obtain a corresponding electrical signal, and different PPG units can work in a time-sharing or parallel manner. As an example, a PPG sensor comprises 2 PPG units, each comprising 1 light-emitting unit and 2 photodetectors. The light emitting unit in the first PPG unit and each of the 2 photodetectors cooperate to serve as one measurement channel, so that 2 measurement channels can be obtained, the light emitting unit and the 2 photodetectors in the second PPG unit can also form 2 measurement channels, and a physiological parameter measurement result can be obtained based on PPG signals measured by the 4 measurement channels formed by the two PPG units.

In a second measurement mode, the light emitting unit in the PPG sensor and the at least one photodetector in the same PPG unit and/or in a different PPG unit are configured to cooperate as one measurement channel. At this time, different light emitting units may operate in a time-sharing manner, a certain light emitting unit in the PPG unit emits an optical signal with a specific wavelength, and all the photodetectors in the PPG sensor may receive the returned optical signal and process the optical signal to obtain a corresponding electrical signal. Continuing with the example of 2 PPG units as described above, at the first time, when the light emitting unit in the first PPG unit emits the light signal, the 4 photodetectors in the PPG sensor respectively detect the returned light signal, resulting in 4 measurement channels. At a second time instant, when the light emitting unit in the second PPG unit emits the light signal, 4 of the PPG sensors respectively detect the returned light signal, resulting in 4 measurement passes. Physiological parameter measurements can be obtained based on the PPG signals obtained for these 8 measurement channels.

Illustratively, in conjunction with fig. 1, when the terminal device measures a heart rate, thelight emitting unit 20 emits an optical signal of a first wavelength, such as green light. Specifically, at a first time, a firstlight emitting unit 20 in a first PPG unit emits a light signal of a first wavelength, a secondlight emitting unit 20 and a secondlight detector 30 in a second PPG unit are turned off, twofirst light detectors 30 adjacent to the firstlight emitting unit 20 in the first PPG unit receive returned light signals, and eachfirst light detector 30 acquires one PPG signal to obtain PPG signals of 2 channels; then, the first light-emittingunit 20 and the first light-emittingdetector 30 are turned off, the second light-emittingunit 20 emits the optical signal with the first wavelength, and two second light-emittingdetectors 30 in the second PPG unit adjacent to the second light-emittingunit 20 receive the returned optical signal, so as to generate 2 channels of PPG signals. In this way, a heart rate measurement of the user can be determined jointly from the PPG signals of the 4 channels.

When the terminal device measures blood oxygen, thelight emitting unit 20 emits a light signal of a second wavelength, such as red light or infrared light. Specifically, at a first time, the first light-emittingunit 20 in the first PPG unit emits a red light signal, the second light-emittingunit 20 in the second PPG unit is turned off, and the returned light signals may be received by the 4photodetectors 30 in the PPG sensor, resulting in PPG signals of 4 channels; at a second moment, the firstlight emitting unit 20 is turned off, the secondlight emitting unit 20 emits a red light signal, and the returned light signals are received by the 4photo detectors 30 in the PPG sensor, resulting in 4 channels of PPG signals, so that the blood oxygenation measurement of the user can be determined from the 8 channels of PPG signals.

In another embodiment, thelight emitting unit 20 may emit red light and infrared light, respectively, and obtain the blood oxygen measurement result based on the PPG signals corresponding to the red light and the infrared light, respectively. For example, on the basis of the above example, at the third time, the first light-emittingunit 20 emits an infrared light signal, the second light-emitting unit is turned off, and the returned infrared light signal is received by the 4photodetectors 30 of the PPG sensor, so as to obtain PPG signals of 4 channels; at the fourth time, the first light-emittingunit 20 is turned off, the second light-emittingunit 20 emits infrared light signals, and the 4photodetectors 30 receive the returned infrared light signals to obtain PPG signals of 4 channels, so that PPG signals of 8 channels may also be obtained, and finally, the blood oxygen measurement result of the user may be determined by combining the PPG signals of 16 channels.

In the description of the above embodiments of the present invention, taking the terminal device including at least two PPG units as an example, in some embodiments, the terminal device may also have only one PPG unit, and for brevity, it is not repeated here.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A terminal device, characterized by comprising a back cover part (10) and at least two PPG units arranged at one side of the back cover part (10);

the PPG unit comprises: at least one light emitting unit (20) and at least one light detector (30), wherein the distance between the center of the light emitting unit (20) and the center of the adjacent light detector (30) is 3-4mm.

2. A terminal device according to claim 1, characterized in that the PPG unit comprises a light-emitting unit (20) and a plurality of light detectors (30), the plurality of light detectors (30) being symmetrically distributed about the light-emitting unit (20); or

The projections of the at least two PPG units on the back cover part (10) are symmetrically distributed.

3. A terminal device according to claim 1 or 2, characterized in that the plurality of light detectors (30) in the at least two PPG units are arranged around the outside of the plurality of light emitting units (20) in the at least two PPG units, the spacing between the light emitting units (20) and the light detectors (30) located in the same PPG unit being smaller than the spacing between the light emitting units (20) and the light detectors (30) located in different PPG units; or,

the plurality of photodetectors (30) in the at least two PPG units enclose a rectangular area, and the plurality of light emitting units (20) in the at least two PPG units are arranged on an axis of the rectangular area.

4. A terminal device according to claim 1 or 2, characterized in that the back cover part (10) has a plurality of light-transmitting areas thereon, the light-transmitting areas having a size in the range of 2-3mm.

5. A terminal device according to claim 1 or 2, characterized in that the back cover part (10) has thereon at least one first light-transmitting area (11) arranged in correspondence with a plurality of light-emitting units (20) of the at least two PPG units, at least one second light-transmitting area (12) arranged in correspondence with a plurality of light detectors (30) of the at least two PPG units, and at least one light-blocking area arranged between the first and second light-transmitting areas.

6. The terminal device according to claim 5, wherein the light-shielded area is provided with a retaining wall structure (40), wherein the retaining wall structure (40) is provided surrounding the light-emitting unit (20) or surrounding the light detector (30); and/or

The light-shielding area is coated with a light-shielding material.

7. Terminal device according to claim 5, characterized in that the first light-transmitting area (11) comprises a first light-transmitting hole and a light-transmitting lens (21) arranged on the first light-transmitting hole; and/or

The second light-transmitting area (12) comprises a second light-transmitting hole and a light-transmitting lens (31) arranged on the second light-transmitting hole.

8. A terminal device according to claim 5, characterized in that the number of the first light-transmitting area is one, and the light-emitting units (20) of the at least two PPG units are arranged at corresponding positions of the first light-transmitting area; and/or

The number of the second light-transmitting areas is one, and the plurality of light detectors (30) in the at least two PPG units are arranged at corresponding positions of the second light-transmitting areas.

9. The terminal device according to claim 5, wherein the rear cover member includes an integral light-transmitting body and a support provided on the integral light-transmitting body, the support being provided with the light-shielding region thereon.

10. The terminal device according to claim 1, wherein the terminal device is a wrist-worn device.

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