WO2023279788A1

WO2023279788A1 - Electronic device and wearable device

Info

Publication number: WO2023279788A1
Application number: PCT/CN2022/085265
Authority: WO
Inventors: 史阳柯
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-07-06
Filing date: 2022-04-06
Publication date: 2023-01-12

Abstract

An electronic device (100), comprising a mainboard (120) and a capacitive sensor (150). The mainboard (120) comprising a light-emitting device (121) and a receiving device (123); the light-emitting device (121) is used for emitting light to the skin of a human body; the capacitive sensor (150) is stacked on the mainboard (120); when the electronic device (100) is worn, the capacitive sensor (150) is located on the side of the mainboard (120) close to the skin of the human body; at least two light through holes (151) that are arranged at an interval are formed in the capacitive sensor (150), wherein the position of at least one light through hole (151) corresponds to the position of the light-emitting device (121), and the position of at least one light through hole (151) corresponds to the position of the receiving device (123); and a light filtering groove (153) is formed between at least two adjacent light through holes (151).

Description

Electronics and Wearables

This application is required to be submitted to the China Patent Office on July 6, 2021. The application number is 2021215325410, and the application title is "electronic equipment and wearable equipment", and the application number is 2021107641321, and the application title is "electronic equipment and wearable equipment". The priority of the Chinese patent application, the entire content of which is incorporated in this application by reference.

technical field

The present application relates to the technical field of wearable devices, in particular to an electronic device and a wearable device.

Background technique

Wearable devices such as smart watches and smart bracelets can generally be equipped with heart rate sensors or blood oxygen sensors to detect the user's heart rate or blood oxygen data to provide health guidance functions. Heart rate sensors and blood oxygen sensors generally emit light to the human body through a light-emitting device, and receive reflected light from human tissue through a receiving device to obtain measurement results. However, part of the light emitted from the light-emitting device will be directly received by the receiving device after being reflected or refracted inside the wearable device. This part of the light received by the receiving device without being reflected by the subcutaneous tissue of the human body will reduce the accuracy of the measurement results. precision.

Contents of the invention

Based on this, it is necessary to provide an electronic device and a wearable device.

An electronic device comprising:

A main board, including a light emitting device and a receiving device, the light emitting device is used to emit light to human skin; and

A capacitive sensor is stacked on the main board, and when the electronic device is worn, the capacitive sensor is located on the side of the main board close to the skin of the human body; the capacitive sensor is provided with at least two light-through holes, wherein at least one of the light through holes is located corresponding to the light emitting device, at least one of the light through holes is located corresponding to the receiving device, and at least two adjacent light through holes A filter slot is provided.

An electronic device comprising:

Middle frame;

The display module is arranged at one end of the middle frame;

The rear shell is arranged at the opposite end of the middle frame;

The light emitting device and the receiving device are arranged in the space enclosed by the display module, the middle frame and the rear case; and

The capacitive sensor is arranged on the side of the rear shell facing the display module; the capacitive sensor is provided with at least two light holes arranged at intervals, wherein the position of at least one of the light holes is the same as that of the The light-emitting device is arranged correspondingly, the position of at least one said light-through hole is arranged correspondingly to said receiving device, and a filter groove is opened between at least two adjacent said light-through holes.

A wearable device includes a strap assembly and the above-mentioned electronic device, the strap assembly is connected to the electronic device and used to wear the electronic device on the user's wrist.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain the drawings of other embodiments according to these drawings without creative work.

Fig. 1 is a schematic diagram of a wearable device of an embodiment;

FIG. 2 is a schematic diagram of an electronic device of a wearable device according to an embodiment;

3 is a schematic diagram of an assembled back cover, a capacitive sensor, a shading member, and a main board of an electronic device;

FIG. 4 is an exploded view of the back cover, the capacitive sensor, the shading member and the main board of the electronic device shown in FIG. 3;

FIG. 5 is another exploded view of the back cover, the capacitive sensor, the shading member and the main board of the electronic device shown in FIG. 3;

6 is a schematic diagram of a cover plate of a rear cover of an electronic device according to an embodiment;

7a-7e are schematic diagrams of the shape and arrangement of the filter slots of the capacitive sensor of the electronic device in some embodiments;

8 is a front view of a substrate of a back cover of an electronic device according to an embodiment;

Fig. 9 is a sectional view along A-A of the substrate of the back cover of the electronic device shown in Fig. 8;

FIG. 10 is a cross-sectional view of an assembled electronic device with a rear cover, a capacitive sensor, a light shield and a main board.

Reference signs:

10. Wearable devices 100. Electronic equipment 103. Card slots

110. Middle frame 120. Main board 121. Light emitting device

121a, main light-emitting part 121b, auxiliary light-emitting part 123, receiving device

130. Display module 131. Protection board 140. Back cover

140a, light-transmitting area 140b, groove 141, back shell

143. Cover plate 1431. Substrate 1433. Ink layer

1433a, through hole 1435, shading ink 150, capacitive sensor

151. Light-through hole 151a, first hole 151b, second hole

153. Filter slot 160. Shading piece 161. Through hole

200. Strap assembly 220. Strap

detailed description

In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

The first aspect of the present application discloses an electronic device, including a main board and a capacitive sensor, the main board includes a light-emitting device and a receiving device, the light-emitting device is used to emit light to human skin; the capacitive sensor is stacked on the main board, and When the electronic device is worn, the capacitive sensor is located on the side of the main board close to the skin of the human body; the capacitive sensor is provided with at least two light holes arranged at intervals, and at least one of the light holes is located Corresponding to the light-emitting device, at least one of the light-through holes is located corresponding to the receiving device, and a filter groove is opened between at least two adjacent light-through holes.

In one of the embodiments, the filter groove is a through groove and is spaced apart from the light through hole.

In one of the embodiments, the width of the filter groove is greater than 0.2 mm.

In one of the embodiments, there are multiple filter grooves between two adjacent light passage holes, and the multiple filter grooves are arranged at intervals.

In one of the embodiments, a light absorber is arranged in the filter groove.

In one of the embodiments, the electronic device includes a light-shielding member, and the light-shielding member is arranged between the capacitive sensor and the main board, so as to connect the light-emitting device corresponding to any one of the light-through holes with the light-shielding member. The receiving devices corresponding to the adjacent light through holes are partitioned.

In one of the embodiments, the shading member is provided with at least two through holes arranged at intervals, and the through holes are used to accommodate at least one of the light emitting device and the receiving device.

In one of the embodiments, the electronic device includes a cover plate, and the cover plate covers a side of the capacitive sensor away from the main board; the cover plate has at least two light-transmitting regions arranged at intervals, the The light-transmitting regions correspond one-to-one to the light-through holes.

In one of the embodiments, the light through hole includes a first hole and at least two second holes, and the second holes are arranged in the circumferential direction of the first hole; the light emitting device includes a main light emitting element and As for the auxiliary light-emitting element, the main light-emitting element is arranged corresponding to the first hole, and the auxiliary light-emitting element and the receiving device are arranged corresponding to the second hole.

In one of the embodiments, the filter groove is provided between the first hole and the second hole and between two adjacent second holes.

In one embodiment, the cover plate corresponding to the first hole is provided with a groove surrounding the light-transmitting area.

In one of the embodiments, the groove wall of the groove is covered with light-shielding ink.

In one embodiment, the cover plate includes a transparent substrate and an ink layer covering the surface of the substrate, the ink layer is provided with through holes to define the light-transmitting area on the substrate, and the concave The groove is disposed on the substrate corresponding to the first hole.

In one embodiment, the inner diameter of the groove is larger than 3mm.

The second aspect of the present application discloses an electronic device, including a middle frame, a display module, a rear case, a light emitting device, a receiving device and a capacitive sensor. The display module is arranged at one end of the middle frame; The opposite end of the middle frame; the light-emitting device and the receiving device are arranged in the space enclosed by the display module, the middle frame and the back shell; the capacitive sensor is arranged on the back shell Towards the side of the display screen module; the capacitive sensor is provided with at least two light through holes arranged at intervals, wherein at least one of the light through holes is located corresponding to the light emitting device, and at least one of the light through holes The position of the light hole is set corresponding to the receiving device, and a filter groove is opened between at least two adjacent light through holes.

In one of the embodiments, a light absorber is arranged in the filter groove.

In one of the embodiments, the electronic device includes a shading member, the shading member is arranged on the side of the capacitive sensor facing the display module, and the shading member is provided with at least two through holes arranged at intervals. A hole, the through hole is used to accommodate at least one of the light emitting device and the receiving device, so as to connect the light emitting device corresponding to any one of the light through holes with the adjacent said light through hole The corresponding receiving device is isolated.

The third aspect of the present application discloses a wearable device, including a strap assembly and the electronic device described in any of the above embodiments, the strap assembly is connected to the electronic device and used to wear the electronic device to the user wrist.

Referring to FIG. 1 , in some embodiments, a wearable device 10 includes an electronic device 100 and a strap assembly 200 , the strap assembly 200 is mounted on the electronic device 100 and the electronic device 100 can be worn to the user's wrist through the strap assembly 200 . Referring to FIG. 2 , the electronic device 100 includes a middle frame 110 and electronic components such as a main board 120 ( FIG. 5 ) and a battery (not shown) disposed in the middle frame 110 . The electronic components are arranged in the receiving cavity. The middle frame 110 can be made of non-metallic materials such as plastic, rubber, silica gel, wood, ceramics or glass, and the middle frame 110 can also be made of metal materials such as stainless steel, aluminum alloy or magnesium alloy. The middle frame 110 can also be a metal injection molded part, that is, the metal material is used to ensure the structural rigidity of the middle frame 110, and the inner surface of the metal body is formed by injection molding with protrusions, grooves, threaded holes and other structures for assembly and positioning.

In some embodiments, the wearable device 10 is a smart watch, and the accommodating cavity is used to set electronic components such as batteries, a main board 120, and a display module 130, and the main board 120 can integrate a processor, a storage unit, and a communication module of the wearable device 10 and other electronic components, the battery can supply power for the motherboard 120, the display module 130 and other electronic components. The display module 130 covers the receiving cavity and is connected to the middle frame 110, which can be used to display information and provide an interactive interface for the user. The display module 130 can further include a display screen (not shown) and a protective plate 131 covering the display screen. The display screen can be an LCD (Liquid Crystal Display, liquid crystal display) screen or an OLED (Organic Light-Emitting Diode, organic light-emitting diode) ) screen, etc., the protective plate 131 can be made of glass or sapphire. The protective plate 131 is transparent and has relatively high light transmittance, for example, the light transmittance of the protective plate 131 is above 80%. The display module 130 may have a touch function, but the touch function is not required, and the display module 130 is not required.

The middle frame 110 is roughly in the shape of a rectangular frame, and the four corners of the rectangle can be chamfered to form a circular arc transition, so that the wearable device 10 has better appearance characteristics. In other embodiments, the middle frame 110 may also be in the shape of a circular frame. The side of the middle frame 110, that is, the surface facing away from the storage cavity, can be provided with a matching structure for installing the strap assembly 200, and the strap assembly 200 can form a reliable connection with the middle frame 110 through the matching structure of the middle frame 110, so as to connect the electronic device 100 is securely worn to the user's wrist. In some embodiments, the strap assembly 200 can be easily detached from the middle frame 110 , so that the user can replace the strap assembly 200 conveniently. For example, the user can purchase strap assemblies 200 of various styles, and replace the strap assemblies 200 according to usage scenarios, so as to improve the convenience of use. For example, the user can use a more formal strap assembly 200 on formal occasions, and use a casual-style strap assembly 200 on recreational occasions.

Continue to refer to FIG. 1 and FIG. 2 , in some embodiments, the strap assembly 200 includes two straps 220 (one of which is shown in the figure), and the opposite ends of the electronic device 100 are respectively provided with straps 220 for mounting. One end of each of the two straps 220 is connected to the electronic device 100, and the ends of the two straps 220 facing away from the electronic device 100 can be fastened together to form a storage space, so that the electronic device 100 can be worn through the strap assembly 200 to the user's wrist. In some other embodiments, the strap assembly 200 may be a one-piece structure, one end of the strap assembly 200 is connected to one end of the electronic device 100, and the other end of the electronic device 100 may be provided with a hole for the strap 220 to pass through. The buckle, the free end of the strap 220 can pass through the buckle and be fixed to other positions of the strap 220 to form a storage space, and the size of the storage space is easy to adjust to facilitate the user to wear.

3, FIG. 4 and FIG. 5, the electronic device 100 may include a back cover 140 connected to the middle frame 110, after the wearable device 10 is normally worn on the user's wrist, at least part of the surface of the back cover 140 fits the user's wrist . In the embodiment in which the electronic device 100 includes the display module 130 , the rear cover 140 is disposed at two ends of the middle frame 110 opposite to the display module 130 and covers the two ends of the receiving cavity respectively. The back cover 140 can be made of glass, ceramic or plastic, and the back cover 140 can be provided with a light-transmitting area 140a for heart rate detection or blood oxygen detection. The light-transmitting area 140a is used to detect the transmission of light. Of course, in some implementations, the rear cover 140 can be integrally formed with the middle frame 110 . The electronic device 100 may include more than two types of biosensors, and the biosensors may be used to detect biological data such as heart rate, respiration rate, blood pressure, or body fat. In some embodiments, biosensors can also be used to detect motion states such as for counting steps. In other implementation manners, the wearable device 10 may be a smart bracelet or the like.

In some embodiments, the rear cover 140 may include a rear case 141 and a cover 143 , and the cover 143 is connected to the rear case 141 . After the wearable device 10 is worn on the user's wrist, at least part of the surface of the cover 143 fits the user's wrist. The light-transmitting area 140a for heart rate detection or blood oxygen detection is disposed on the cover plate 143 . At least two light-transmitting regions 140a may be provided, and more than two light-transmitting regions 140a may be arranged at intervals.

Referring to FIG. 6 , the cover plate 143 may include a transparent substrate 1431 and an ink layer 1433 covering the inner surface of the substrate 1431 . The ink layer 1433 is provided with a through hole 1433 a to define a light-transmitting region 140 a on the substrate 1431 through which light passes. The inner surface of the substrate 1431 is the surface of the substrate 1431 facing the interior of the electronic device 100 , and the ink layer 1433 is disposed on the inner surface of the substrate 1431 and can play a decorative and light-shielding role.

The material of the rear shell 141 can be the same as that of the substrate 1431 , for example, the rear shell 141 and the substrate 1431 can be made of glass, or both can be made of ceramic. The material of the rear shell 141 can also be different from that of the substrate 1431 , for example, the material of the rear shell 141 is stainless steel or aluminum alloy, and the material of the substrate 1431 is glass or ceramics.

Referring to FIGS. 4 and 5 , the main board 120 of the electronic device 100 may include a light emitting device 121 and a receiving device 123 . For example, the light emitting device 121 may include an LED (Light-Emitting Diode, light emitting diode), which can emit light when powered on. When the user wears the wearable device 10 normally, the light emitted by the light emitting device 121 can irradiate the human skin. The receiving device 123 may include a PD (Photo-Diode, photodiode), which may be used to receive light and convert it into an electrical signal. In some embodiments, the electronic device 100 includes at least two kinds of LEDs, one of which is used to emit red light and infrared light, and this LED can be used for blood oxygen measurement; the other LED is used to emit green light, and this LED Can be used for heart rate measurement.

After the electronic device 100 is normally worn on the user's wrist, the LED used for blood oxygen measurement is powered on and emits light. At least part of the light penetrates into the skin and is reflected by the subcutaneous tissue of the human body before being emitted to the PD. The PD receives this part of the reflected light and converts it into electricity. After further processing, the user's blood oxygen data can be obtained.

Similarly, after the electronic device 100 is normally worn on the user's wrist, the LED used for heart rate measurement is powered on and emits light. At least part of the light penetrates into the skin and is reflected by the subcutaneous tissue of the human body before being emitted to the PD. The PD receives this part of the reflected light. Finally, it is converted into an electrical signal, and the user's heart rate data can be obtained after further processing.

It can be understood that the LED, PD and related control circuits used to measure heart rate can be regarded as constituting a heart rate sensor, and the LEDs, PDs and related control circuits used to measure blood oxygen can be regarded as constituting a blood oxygen sensor.

Continuing to refer to FIG. 4 and FIG. 5, the electronic device 100 further includes a capacitive sensor 150, which is stacked on the main board 120, and when the electronic device 100 is worn, the capacitive sensor 150 is located on the side of the main board 120 close to the skin of the human body. The cover plate 143 of the cover 140 covers a side of the capacitive sensor 150 away from the main board 120 . The side close to the human skin can be simply understood as: after the wearable device 10 is normally worn on the user's wrist, the side of the wearable device 10 facing the skin of the user's wrist, on this side, at least part of the wearable device 10 Surface contact with human skin. The capacitive sensor 150 can be used to detect the wearing state of the wearable device 10, and its main part is a flexible circuit board with a certain degree of light transmission. For example, when the wearable device 10 is normally worn by the user, the capacitance detected by the capacitive sensor 150 will change compared to the unworn state, so it can be used to detect the wearing state of the wearable device 10 . Capacitive sensor 150 is also sometimes called CAPSENSOR (Capacitive Sensor).

The capacitive sensor 150 is provided with at least two light holes 151 arranged at intervals, and the light holes 151 correspond to the light-transmitting regions 140 a of the cover plate 143 one by one. The position of at least one light hole 151 is set corresponding to the light emitting device 121 , the position of at least one light hole 151 is set corresponding to the receiving device 123 , and a filter groove 153 is opened between at least two adjacent light holes 151 .

Referring to FIG. 5 , in one embodiment, there are five light through holes 151 , all of which are round holes. One of the light holes 151 is disposed in the central area of the capacitive sensor 150 , and the other four light holes 151 are arranged in the circumferential direction of the middle light hole 151 . The middle light hole 151 is correspondingly provided with a light-emitting device 121, and the light-emitting device 121 corresponding to the middle light hole 151 includes at least two kinds of LEDs, one of which is used to emit red light and infrared light and is used for the detection process of blood oxygen, and the other An LED is used to emit green light and is used for the heart rate detection process.

Each peripheral light hole 151 arranged around the central light hole 151 is correspondingly provided with a light emitting device 121 and a receiving device 123. The light emitting device 121 includes an LED, which can emit red light and infrared light and is used for the detection process of blood oxygen; the receiving device 123 includes a PD for receiving light and converting it into an electrical signal.

To simplify the description, the light hole 151 can be divided into a first hole 151a and a second hole 151b, the first hole 151a is disposed in the middle area of the capacitive sensor 150, and the second holes 151b are arranged in the circumferential direction of the first hole 151a. Exemplarily, in the embodiment shown in FIG. 5 , the diameter of the first hole 151 a is slightly smaller than the diameter of the second hole 151 b, and the light beam emitted from the first hole 151 a is more concentrated. A filter groove 153 may be provided between adjacent first holes 151a and second holes 151b, and between two adjacent second holes 151b.

When the electronic device 100 is measuring blood oxygen, the light-emitting device 121 corresponding to the first hole 151a can emit red light and infrared light. Part of the light enters the subcutaneous tissue and is reflected by the human subcutaneous tissue to the four second holes 151b. The receiving devices 123 corresponding to the four second holes 151b can receive the reflected light and convert it into an electrical signal, and after further processing, the user can obtain the blood oxygen data of the user. In other words, the cooperation of the light emitting device 121 of the first hole 151a and the receiving devices 123 of the four second holes 151b can form 4 blood oxygen detection channels. The filter groove 153 arranged between the adjacent first hole 151a and the second hole 151b can prevent the crosslight between the first hole 151a and the second hole 151b (that is, from the first hole 151a to the second hole 151b The light that is not reflected by the subcutaneous tissue of the human body) reduces the detection accuracy of blood oxygen.

For example, in the process of measuring blood oxygen, the light emitting device 121 corresponding to any second hole 151b can also emit red light and infrared light, and the light is irradiated from the second hole 151b through the corresponding light-transmitting area 140a of the cover plate 143 to the The user's skin, at least part of the light enters the subcutaneous tissue and is reflected by the human subcutaneous tissue to the other three second holes 151b. The receiving devices 123 corresponding to the other three second holes 151b can receive the reflected light and convert it into an electrical signal, and after further processing, the user can obtain the blood oxygen data of the user. In other words, the cooperation of the light-emitting device 121 in any second hole 151b and the receiving devices 123 in the other three second holes 151b can form 3 detection channels, that is, 4*3=12 detection channels in total. The filter groove 153 arranged between two adjacent second holes 151b can prevent the cross-light between two adjacent second holes 151b (that is, from one second hole 151b to another second hole 151b The light that is not reflected by the subcutaneous tissue of the human body) reduces the detection accuracy of blood oxygen.

Exemplarily, in the process of measuring blood oxygen, blood oxygen data obtained through detection of the above-mentioned (4+12)=16 detection channels may be fused to obtain a final measurement result. Alternatively, several paths with relatively high accuracy may be selected from the above 16 detection results, and then fused to obtain the final measurement result.

For example, in the process of measuring heart rate, the light emitting device 121 corresponding to the first hole 151a can emit green light, and the light is irradiated from the first hole 151a to the user's skin through the light-transmitting area 140a of the cover plate 143, and at least part of the light enters The subcutaneous tissue is reflected to the four second holes 151b by the human subcutaneous tissue. The receiving devices 123 corresponding to the four second holes 151b can receive the reflected light and convert it into an electrical signal, and after further processing, the user can obtain the user's heart rate data. In other words, the cooperation of the light emitting device 121 of the first hole 151a and the receiving device 123 of the second hole 151b can form 4 heart rate detection channels. The filter groove 153 arranged between the adjacent first hole 151a and the second hole 151b can also prevent the crosslight between the first hole 151a and the second hole 151b (that is, from the first hole 151a to the second hole 151b light that is not reflected by the subcutaneous tissue of the human body) reduces the detection accuracy of the heart rate.

In some embodiments, the light emitting device 121 may include a main light emitting part 121a and an auxiliary light emitting part 121b, the main light emitting part 121a is disposed corresponding to the first hole 151a, and the auxiliary light emitting part 121b and the receiving device 123 are disposed corresponding to the second hole 151b. The power of the main light emitting part 121a may be greater than the power of the auxiliary light emitting part 121b. When the user wears the wearable device 10 normally, the main light-emitting element 121a is generally in the middle of the width direction of the wrist, and its position can be used to measure more accurate physiological parameters, and the auxiliary light-emitting element 121b is used to further correct the main light-emitting element. The measurement result of the light emitting element 121a. In the embodiment in which the power of the main light-emitting part 121a is greater than that of the auxiliary light-emitting part 121b, since the main light-emitting part 121a can emit stronger light, the filter groove disposed between the adjacent first hole 151a and the second hole 151b 153, compared with the filtering groove 153 arranged between two adjacent second holes 151b, the cross-light elimination effect can be more obvious.

It can be understood that, in other embodiments, the diameter of the first hole 151a may be equal to the diameter of the second hole 151b. The shape of the first hole 151a may be different from that of the second hole 151b. For example, the first hole 151a may be a circular hole, and the second hole 151b may be a rectangular hole. In other embodiments, the light through holes 151 may also be fan-shaped holes or holes of other shapes, the number of which may be reduced or increased, and the arrangement thereof may not be limited to the arrangement disclosed above. For example, in an embodiment, the number of the light through holes 151 can be set to eight, and can be arranged in a two-dimensional row or in a ring, and each light through hole 151 is correspondingly provided with an LED and a PD. This structural setting can also obtain higher heart rate or blood oxygen detection accuracy.

In some embodiments, the filter groove 153 is a through groove and is spaced apart from the light through hole 151 . In other words, the filter groove 153 extends from one side of the capacitive sensor 150 close to the human skin to the opposite side. The width of the filter groove 153 may be larger than 0.2 mm. For example, in some implementations, the width of the filter groove 153 is 0.35mm-0.4mm. For example, the width of the filter groove 153 can be 0.36mm, or 0.38mm, or 0.39mm, etc. The processing of the filter groove 153 in this width range is relatively easy, and it has a better filtering effect on cross-light between adjacent light-through holes 151 .

The filter groove 153 may have a suitable length such as 10mm, or 12mm, or 15mm, and so on. Under the condition of ensuring the normal operation of the capacitive sensor 150, that is, under the condition that the capacitive sensor 150 meets the detection requirements of the wearing state, the width and length of the filter groove 153 can be set as large as possible to filter out the adjacent passing light as much as possible. The string light between the holes 151 further improves the measurement accuracy of blood oxygen or heart rate.

The present application does not strictly limit the shape of the filter groove 153 . The filter groove 153 may be a long and narrow arc groove, as shown in FIG. 7a. The arc groove can be a superior arc or a inferior arc. For example, in the embodiment shown in FIG. 7a, the filter groove 153 arranged in the circumferential direction of the first hole 151a can be in a superior arc shape, and the filter groove 153 arranged between two adjacent second holes 151b can be in a inferior arc shape. shape. In the embodiment where the light through holes 151 are all round holes, the filter groove 153 between two adjacent light through holes 151 can extend a certain distance along the outline of one of the light through holes 151, so as to ensure the prevention of cross-light filter out. In other embodiments, the filter groove 153 disposed between the adjacent first hole 151a and the second hole 151b may be in the shape of a minor arc, and the filter groove 153 disposed between two adjacent second holes 151b may be in the shape of Excellent arc.

As another example, the filter groove 153 may be a long and narrow linear groove, as shown in FIG. 7b. Of course, the filter groove 153 can also be a zigzag groove, as shown in FIG. 7c. The processing of linear grooves or zigzag grooves is relatively easy, and does not have a great impact on the circuit arrangement inside the capacitive sensor 150 , so the processing efficiency is high.

In other embodiments, there may be multiple filter grooves 153 between two adjacent light through holes 151, and the multiple filter grooves 153 are arranged at intervals, as shown in FIG. 7d. In other words, in this embodiment, the width of a single filter groove 153 can be small, that is, a single filter groove 153 can be in the shape of a long and narrow slit, and multiple filter grooves 153 can be combined to form a filter with better filtering effect. structure, so as to improve the effectiveness of filtering the cross-light between adjacent light holes 151, so as to improve the detection accuracy of blood oxygen or heart rate.

In this embodiment, the single filter groove 153 can be an arc groove, or a linear groove or a zigzag groove or other shaped grooves. Of course, the plurality of filter grooves 153 disposed between adjacent first holes 151a and second holes 151b may also be a combination of two or more of arc-shaped grooves, linear grooves, zigzag-shaped grooves and special-shaped grooves. The plurality of filter grooves 153 disposed between two adjacent second holes 151b may also be a combination of two or more of arc-shaped grooves, linear grooves, zigzag-shaped grooves and special-shaped grooves. Illustratively, in the combination of filter grooves 153 formed by a plurality of slits, any two adjacent slit-shaped filter grooves 153 do not have to be similar in shape, and the combination of slits with obvious differences in shape (such as arc-shaped grooves, linear grooves, etc.) The combination of grooves, or the combination of arc grooves and zigzag grooves) has greater randomness to the refraction or reflection of light, and is more effective in filtering cross-light.

In other embodiments, the filter groove 153 can be in the shape of a small hole, and a plurality of small hole-shaped filter grooves 153 can be roughly arranged on an arc, or roughly on a straight line, or roughly on a broken line. . Exemplarily, as shown in FIG. 7e, a plurality of small hole-shaped filter grooves 153 are arranged between two adjacent second holes 151b, and the plurality of small hole-shaped light filter grooves 153 are roughly arranged in an arc. superior. Of course, a plurality of small hole-shaped filter grooves 153 can also be arranged between adjacent first holes 151a and second holes 151b, and a plurality of small hole-shaped light filter grooves 153 can also be roughly arranged on an arc. . The combination of multiple small hole-shaped filter grooves 153 can also form a structure with better filtering effect, thereby improving the effectiveness of filtering the cross-light between adjacent light holes 151, so as to improve blood oxygen or heart rate. detection accuracy.

Of course, it can be understood that the function of the filter groove 153 is to filter the cross-light between adjacent light through holes 151, so the filter groove arranged between two adjacent light through holes 151 153 can have more shapes or arrangements. For example, a plurality of small hole-shaped light filter grooves 153 between two adjacent light through holes 151 can be randomly arranged, which is used to weaken or prevent cross-light between two adjacent light through holes 151. This application will not list them one by one.

Further, in some embodiments, a light absorber (not shown) may also be provided in the filter groove 153 . The material of the light absorber can be, but not limited to, black ink, gray ink or black paint. Of course, the light absorber can also be a black or gray porous structure formed by bonding powders (such as graphite powder). The light-absorbing body can absorb light better, that is, the light from one light-passing hole 151 to the other light-passing hole 151 (i.e. string light) can be absorbed by the light-absorbing body after passing through the light-absorbing body, thereby preventing adjacent The crosstalk between the light holes 151 reduces the detection accuracy of blood oxygen or heart rate.

Of course, it can be understood that in other embodiments, the filter groove 153 can also be a blind groove, and a light absorber can also be arranged in the filter groove 153, and the blind groove or the combination of the blind groove and the light absorber can also form a filter effect A better structure can improve the effectiveness of filtering the crosslight between adjacent light holes 151, so as to improve the detection accuracy of blood oxygen or heart rate.

Continuing to refer to FIG. 4 and FIG. 5 , the electronic device 100 includes a light-shielding member 160 , and the light-shielding member 160 can be made of black or gray material with better light-shielding effect. For example, in some embodiments, the shade 160 is a shade of foam. In other embodiments, the light-shielding member 160 may be light-shielding rubber or light-shielding plastic. The shading member 160 is used to isolate the light emitting device 121 corresponding to any light through hole 151 from the receiving device 123 corresponding to the adjacent light through hole 151, so as to prevent the light emitting device 121 corresponding to one light through hole 151 from corresponding to another light through hole 151 The receiving device 123 generates crosslight.

Specifically, the light-shielding member 160 is disposed between the capacitive sensor 150 and the main board 120 , and the light-shielding member 160 is provided with at least two spaced through holes 161 . The light-emitting device 121 and the receiving device 123 arranged on the main board 120 can be protruding. After the light-shielding member 160 is assembled with the main board 120, the light-emitting device 121 and the receiving device 123 can be accommodated in the through hole 161 of the light-shielding member 160, so as to pass The shading member 160 effectively blocks adjacent light emitting devices 121 to prevent cross-light between adjacent light emitting devices 121 . Of course, the number of through holes 161 of the light shielding member 160 may be less than the number of light through holes 151 of the capacitive sensor 150, for example, the outer edge of the light shielding member 160 can be surrounded by the middle frame 110 to form a partition area, and the adjacent light emitting devices 121 avoid Cross-lighting between adjacent light emitting devices 121 can be prevented by being in the same partition area.

Referring to FIG. 8 and FIG. 9 in combination with FIG. 6 , in some embodiments, the cover plate 143 corresponding to the first hole 151 a may also be provided with a groove 140 b surrounding the light-transmitting region 140 a. For example, in an embodiment where the light-transmitting region 140a is circular, the groove 140b may be ring-shaped, and the groove 140b is arranged around the light-transmitting region 140a corresponding to the first hole 151a. In an embodiment where the light-transmitting region 140a is rectangular or fan-shaped or other shapes, the groove 140b may extend in a closed shape along the edge of the light-transmitting region 140a to form a shape similar to the light-transmitting region 140a.

Referring to FIG. 9 , in some embodiments, the inner diameter r of the groove 140b is greater than 3 mm. For example, the inner diameter r of the groove 140b may be 3.2 mm, or 3.5 mm, or 4 mm, and so on. The inner diameter r of the groove 140b is related to the beam angle of the light emitting device 121 and the distance between the light emitting device 121 and the inner surface of the substrate 1431 . Exemplarily, for a given light emitting device 121, the beam angle of the light emitting device 121 (that is, the angle formed by the light beam of the light emitting device 121 at the boundary of a certain intensity range, which is an inherent performance parameter of the light emitting device 121) and The intersection line of the inner surfaces of the substrate 1431 serves as the minimum inner diameter of the groove 140b. In actual processing, it is enough that the inner diameter r of the groove 140b is greater than the minimum inner diameter mentioned above.

This application does not strictly limit the cross-sectional shape, width, and depth of the groove 140b. Under the condition of ensuring the performance and structural strength of the cover plate 143, the larger the width of the groove 140b and the deeper the depth, the greater the impact on the adjacent light-transmitting area. The better the crosslight cancellation effect between 140a. For example, in one embodiment, the cross section of the groove 140b is arc-shaped, the inner diameter r is 3.2 mm, the width d is 0.8 mm, and the depth h is 0.5 mm. The thickness of the substrate 1431 at the position where the groove 140b is located is smaller than the thickness of the substrate 1431 at the position where the groove 140b is not provided between the light-transmitting regions 140a and adjacent light-transmitting regions 140a. Referring to FIG. 10 , the light emitted from the main light-emitting element 121a encounters the thinner substrate 1431 at the groove 140b , and the propagation path changes due to reflection or refraction. In other words, the arrangement of the groove 140b can roughly confine the portion of the light emitted by the light emitting device 121 used for measurement within the area defined by the inner diameter of the groove 140b, reducing the amount of light emitted by the light emitting device 121 inside the substrate 1431. The projected width of the flat area of the surface, that is, the effective light spot of the light emitted by the main light-emitting element 121a on the inner surface of the substrate 1431 is limited to a smaller width range, thereby reducing cross-light effects between adjacent light-transmitting regions 140a.

In some embodiments, the groove wall of the groove 140b can be roughened, for example, the groove wall of the groove 140b can be processed into a frosted surface or a matte surface, so that the light emitted by the main light-emitting element 121a can pass through the groove of the groove 140b. Scattering effect is generated at the wall to further reduce cross-light effect between adjacent light-transmitting regions 140a.

In some other embodiments, the groove wall of the groove 140b may be covered with light-shielding ink 1435 . The light-shielding ink 1435 can be black or gray ink, which has better light-absorbing properties. The setting of the light-shielding ink 1435 can further block the cross-light between adjacent light-transmitting regions 140a, thereby preventing the cross-light from reducing the detection accuracy of blood oxygen or heart rate.

It can be understood that, in other embodiments, the light-transmitting region 140a corresponding to each second hole 151b can also be provided with a groove 140b surrounding the light-transmitting region 140a, and the groove wall of the groove 140b can also be roughened or set The light-shielding ink is used to reduce cross-light interference between adjacent light-transmitting regions 140a, thereby further improving the measurement accuracy of blood oxygen or heart rate.

In the related art, the capacitive sensor 150 of the electronic device 100 is generally attached to the inner surface of the cover plate 143 , the capacitive sensor 150 has a certain light transmittance, and the substrate 1431 also has light transmittance. During blood oxygen or heart rate measurement, part of the light emitted by the light emitting device 121 corresponding to one light hole 151 can pass through the capacitive sensor 150 between adjacent light holes 151 and enter the adjacent light hole 151 , Part of it can pass through the substrate 1431 between adjacent light-transmitting regions 140a and enter the adjacent light-through hole 151. These light rays that are not reflected by the subcutaneous tissue of the human body and are received by the receiving device 123 are miscellaneous in the blood oxygen or heart rate measurement process. Astigmatism can reduce the accuracy of blood oxygen or heart rate measurement.

In the wearable device 10 of the present application, by opening a filter groove 153 between at least two adjacent light-through holes 151 , part of the light emitted by the light-emitting device 121 corresponding to one light-through hole 151 passes through the capacitive sensor 150 When propagating to the adjacent light-through hole 151, the filter groove 153 will reflect or refract this part of the light, so as to filter out this part of stray light and prevent this part of the light that is not reflected by the subcutaneous tissue of the human body from being directly The receiving device 123 receives it, so that this part of stray light can be prevented from reducing the accuracy of the measurement result, so as to improve the heart rate or blood oxygen measurement accuracy of the electronic device 100 .

Similarly, by setting the groove 140b on the substrate 1431, roughening the groove wall of the groove 140b or setting the light-shielding ink 1435 on the groove 140b, part of the light emitted by the light-emitting device 121 corresponding to a light-through hole 151 enters the groove After 140b, due to the refraction or reflection of the groove wall, or the absorption of the light-shielding ink 1435, this part of stray light can be prevented from being directly received by the receiving device 123 without being reflected by the subcutaneous tissue of the human body, thereby preventing this part of stray light from reducing the measurement The accuracy of the result is used to improve the heart rate or blood oxygen measurement accuracy of the electronic device 100 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

An electronic device comprising:

A main board, including a light emitting device and a receiving device, the light emitting device is used to emit light to human skin; and

A capacitive sensor is stacked on the main board, and when the electronic device is worn, the capacitive sensor is located on the side of the main board close to the skin of the human body; the capacitive sensor is provided with at least two light-through holes, wherein at least one of the light through holes is located corresponding to the light emitting device, at least one of the light through holes is located corresponding to the receiving device, and at least two adjacent light through holes A filter slot is provided.
The electronic device according to claim 1, wherein the filter groove is a through groove and is spaced apart from the light through hole.
The electronic device according to claim 2, wherein the width of the filter groove is larger than 0.2mm.
The electronic device according to claim 2, characterized in that there are multiple filter grooves between two adjacent light through holes, and the multiple filter grooves are arranged at intervals.
The electronic device according to claim 2, wherein a light absorber is arranged in the filter groove.
The electronic device according to claim 2, characterized in that the electronic device comprises a light-shielding member, and the light-shielding member is arranged between the capacitive sensor and the main board, so as to connect any of the light-through holes The corresponding light emitting device is isolated from the receiving device corresponding to the adjacent light through hole.
The electronic device according to claim 6, wherein the light-shielding member is provided with at least two through holes arranged at intervals, and the through holes are used to accommodate at least one of the light emitting device and the receiving device .
The electronic device according to any one of claims 1-7, wherein the electronic device comprises a cover plate, and the cover plate covers a side of the capacitive sensor away from the main board; the cover plate has There are at least two light-transmitting regions arranged at intervals, and the light-transmitting regions correspond to the light-through holes one by one.
The electronic device according to claim 8, wherein the light-through hole comprises a first hole and at least two second holes, and the second holes are arranged in the circumferential direction of the first hole; The light emitting device includes a main light emitting part and an auxiliary light emitting part, the main light emitting part is arranged corresponding to the first hole, and the auxiliary light emitting part and the receiving device are arranged corresponding to the second hole.
The electronic device according to claim 9, characterized in that the filter groove is provided between the first hole and the second hole and between two adjacent second holes.
The electronic device according to claim 9, wherein the cover plate corresponding to the first hole is provided with a groove surrounding the light-transmitting area.
The electronic device according to claim 11, wherein the groove wall of the groove is covered with light-shielding ink.
The electronic device according to claim 11, wherein the cover plate comprises a transparent substrate and an ink layer covering the surface of the substrate, and the ink layer is provided with through holes to define the In the light-transmitting area, the groove is disposed on the substrate corresponding to the first hole.
The electronic device according to claim 11, wherein the inner diameter of the groove is larger than 3 mm.
An electronic device comprising:

Middle frame;

The display module is arranged at one end of the middle frame;

The rear shell is arranged at the opposite end of the middle frame;

The light emitting device and the receiving device are arranged in the space enclosed by the display module, the middle frame and the rear case; and

The capacitive sensor is arranged on the side of the rear shell facing the display module; the capacitive sensor is provided with at least two light holes arranged at intervals, wherein the position of at least one of the light holes is the same as that of the The light-emitting device is arranged correspondingly, the position of at least one of the light-through holes is arranged correspondingly to the receiving device, and a filter groove is opened between at least two adjacent said light-through holes.
The electronic device according to claim 15, wherein the filter groove is a through groove and is spaced apart from the light through hole.
The electronic device according to claim 16, characterized in that there are multiple filter grooves between two adjacent light through holes, and the multiple filter grooves are arranged at intervals.
The electronic device according to claim 16, wherein a light absorber is arranged in the filter groove.
The electronic device according to claim 16, wherein the electronic device comprises a shading member, the shading member is arranged on the side of the capacitive sensor facing the display module, and the shading member is provided with At least two through holes arranged at intervals, the through holes are used to accommodate at least one of the light emitting device and the receiving device, so as to connect the light emitting device corresponding to any one of the light through holes to the corresponding The receiving device corresponding to the adjacent light through hole is isolated.
A wearable device, comprising a strap assembly and the electronic device according to any one of claims 1-19, the strap assembly is connected to the electronic device and used to wear the electronic device on the user's wrist.