Electronic device and wearable device

Abstract

The application relates to an electronic device and a wearable device. The electronic device comprises a mainboard and a capacitive sensor. The mainboard comprises a light-emitting device and a receiving device. The capacitive sensor is stacked on the mainboard and is located on the side of the mainboard close to the human skin when the electronic device is worn. The capacitive sensor is provided with at least two spaced-apart light transmission holes. At least one of the light transmission holes is arranged at a position corresponding to the light-emitting device, and at least one of the light transmission holes is arranged at a position corresponding to the receiving device. At least two adjacent light transmission holes are provided with a light filtering groove. In the above electronic device, part of the light emitted by the light-emitting device in one light transmission hole is filtered by the light filtering groove when the light is transmitted to the adjacent light transmission hole through the capacitive sensor, so that the part of the light not reflected by the skin can be prevented from being directly received by the receiving device, thereby preventing the part of the light from reducing the accuracy of the measurement result, and improving the measurement accuracy of the heart rate or blood oxygen.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wearable devices, in particular to an electronic device and a wearable device. BACKGROUND

[0002] Wearable devices such as smart watches, smart bands, etc. can generally be equipped with heart rate sensors or blood oxygen sensors for detecting the heart rate or blood oxygen data of a user to provide health guidance functions. The heart rate sensor and the blood oxygen sensor generally emit light to the human body through a light emitting device, receive the reflected light of the human body tissue through a receiving device, and then obtain the measurement result. However, a 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. 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 result. SUMMARY

[0003] The first aspect of the embodiments of the present application discloses an electronic device to improve the heart rate or blood oxygen detection accuracy of a wearable device.

[0004] An electronic device, comprising:

[0005] a mainboard comprising a light emitting device and a receiving device, the light emitting device being configured to emit light to the skin of a human body; and

[0006] a capacitive sensor stacked on the mainboard and located on the side of the mainboard close to the skin of a human body when the electronic device is worn; the capacitive sensor is provided with at least two spaced-apart light transmission holes, at least one of which is arranged to correspond to the light emitting device, at least one of which is arranged to correspond to the receiving device, and a light filtering groove is arranged between at least two adjacent light transmission holes.

[0007] The capacitive sensor is stacked on the side of the mainboard close to the skin of a human body, i.e. the capacitive sensor is stacked on the side of the mainboard close to the skin of a user. Since the light filtering groove is arranged between at least two adjacent light transmission holes, a part of the light emitted by the light emitting device in one light transmission hole will be reflected or refracted by the light filtering groove when propagating through the capacitive sensor to the adjacent light transmission hole, thereby playing a role in filtering out this part of stray light, preventing this part of light that has not been reflected by the subcutaneous tissue of the human body from being directly received by the receiving device, and thus preventing this part of light from reducing the accuracy of the measurement result, so as to improve the measurement accuracy of the heart rate or blood oxygen of the electronic device.

[0008] The second aspect of the embodiments of the present application discloses a wearable device to improve the heart rate or blood oxygen detection accuracy of the wearable device.

[0009] A wearable device includes a strap assembly and the electronic device described above, the strap assembly being connected to the electronic device and used to wear the electronic device to the wrist of a user.

[0010] In the wearable device described above, the capacitive sensor of the electronic device is stacked on the side of the main board close to the human skin, i.e. the capacitive sensor is stacked on the side of the main board close to the skin of the user. Since the light filtering groove is arranged between at least two adjacent light transmission holes, part of the light emitted by the light emitting device in one light transmission hole will be reflected or refracted by the light filtering groove when propagating through the capacitive sensor to the adjacent light transmission hole, thereby playing a role of filtering out the part of the stray light, preventing the part of the light not reflected by the subcutaneous tissue of the human body from being directly received by the receiver, and thus preventing the part of the light from reducing the accuracy of the measurement result, so as to improve the measurement accuracy of the heart rate or blood oxygen of the electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0012] Figure 1 A schematic diagram of a wearable device according to an embodiment;

[0013] Figure 2 A schematic diagram of an electronic device of a wearable device according to an embodiment;

[0014] Figure 3 A schematic diagram of the assembly of a back cover, a capacitive sensor, a light shielding member and a main board of an electronic device according to an embodiment;

[0015] Figure 4 A schematic diagram of Figure 3 An exploded view of a back cover, a capacitive sensor, a light shielding member and a main board of the electronic device shown in FIG. 8;

[0016] Figure 5 A schematic diagram of Figure 3 Another exploded view of a back cover, a capacitive sensor, a light shielding member and a main board of the electronic device shown in FIG. 8;

[0017] Figure 6 A schematic diagram of a cover plate of a back cover of an electronic device according to an embodiment;

[0018] Figures 7a-7e A schematic diagram of the shape and arrangement of light filtering grooves of a capacitive sensor of an electronic device according to some embodiments;

[0019] Figure 8FIG. 1 is a front view of a substrate of a rear cover of an electronic device according to an embodiment;

[0020] Figure 9 FIG. 2 is a sectional view of the substrate of the rear cover of the electronic device shown in FIG. 1 along A-A; Figure 8

[0021] Figure 10 FIG. 3 is a sectional view of the rear cover, the capacitive sensor, the light shielding member, and the main board of the electronic device according to an embodiment after assembly.

[0022] Reference Signs:

[0023] 10, wearable device 100, electronic device 103, card slot

[0024] 110, middle frame 120, main board 121, light emitting device

[0025] 121a, main light emitting member 121b, auxiliary light emitting member 123, receiving device

[0026] 130, display screen module 131, protective plate 140, rear cover

[0027] 140a, light transmission area 140b, recess 141, rear shell

[0028] 143, cover plate 1431, substrate 1433, ink layer

[0029] 1433a, through hole 1435, light shielding ink 150, capacitive sensor

[0030] 151, light transmission hole 151a, first hole 151b, second hole

[0031] 153, light filtering groove 160, light shielding member 161, through hole

[0032] 200, strap assembly 220, strap DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0034] Referring to FIG. 1, a wearable device 10 according to an embodiment includes an electronic device 100 and a strap assembly 200. Figure 1 In some embodiments, the wearable device 10 includes the electronic device 100 and the strap assembly 200 mounted to the electronic device 100 and the electronic device 100 is wearable to a wrist of a user through the strap assembly 200. Referring to FIG. 1, Figure 2 ​The electronic device 100 includes a mid-frame 110 and a motherboard 120 disposed within the mid-frame 110. Figure 5 The motherboard 120 houses electronic components such as batteries (not shown). The middle frame 110 has a receiving cavity, within which the motherboard 120 and other electronic components are housed. The middle frame 110 can be made of non-metallic materials such as plastic, rubber, silicone, wood, ceramic, or glass, or it can be made of metallic materials such as stainless steel, aluminum alloy, or magnesium alloy. The middle frame 110 can also be a metal injection molded part, where the metal material ensures the structural rigidity of the middle frame 110, and the inner surface of the metal body is injection molded to form protrusions, grooves, threaded holes, and other structures for assembly and positioning.

[0035] In some implementations, the wearable device 10 is a smartwatch. The housing cavity is used to house electronic components such as a battery, a motherboard 120, and a display module 130. The motherboard 120 can integrate electronic components such as the processor, storage unit, and communication module of the wearable device 10. The battery can power the motherboard 120, the display module 130, and other electronic components. The display module 130 covers the housing cavity and is connected to the mid-frame 110. It can be used to display information and provide an interactive interface for the user. The display module 130 may 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) screen or an OLED (Organic Light-Emitting Diode) screen, etc., and the protective plate 131 can be made of glass or sapphire material, etc. The protective plate 131 is transparent and has a relatively high light transmittance, for example, the light transmittance of the protective plate 131 is above 80%. The display module 130 may have touch functionality, but touch functionality is not required, and the display module 130 is not required either.

[0036] The mid-frame 110 is generally rectangular, and the four corners of the rectangle can be rounded to give the wearable device 10 a better appearance. In other embodiments, the mid-frame 110 may also be circular. The side surface of the mid-frame 110, i.e., the surface facing away from the receiving cavity, may be provided with a mating structure for mounting the strap assembly 200. The strap assembly 200 can reliably connect with the mid-frame 110 through the mating structure, so that the electronic device 100 can be reliably worn on the user's wrist. In some embodiments, the strap assembly 200 can also be easily detached from the mid-frame 110, so that the user can easily replace the strap assembly 200. For example, the user can purchase various styles of strap assemblies 200 and change them according to the usage scenario to improve ease of use. For example, the user can use a more formal strap assembly 200 in formal occasions and a casual strap assembly 200 in leisure and entertainment occasions.

[0037] With reference to Figure 1 and Figure 2 In some embodiments, the band assembly 200 includes two bands 220 (one of which is shown in the figures), and the electronic device 100 is provided with a clamping groove 103 at each of the opposite ends thereof for mounting the bands 220. Each of the bands 220 has one end connected to the electronic device 100, and the ends of the bands 220 away from the electronic device 100 can be buckled to form a receiving space, so that the electronic device 100 can be worn on the wrist of a user by the band assembly 200. In other embodiments, the band assembly 200 can be in a whole piece structure, one end of the band assembly 200 is connected to one end of the electronic device 100, and the other end of the electronic device 100 can be provided with a clasp through which the band 220 passes. The free end of the band 220 can pass through the clasp and be fixed to other positions of the band 220 to form a receiving space, and the size of the receiving space is easily adjustable to facilitate the user to wear.

[0038] With reference to Figure 3 , Figure 4 and Figure 5 The electronic device 100 can include a back cover 140 connected to the middle frame 110, and at least part of the surface of the back cover 140 is attached to the wrist of a user after the wearable device 10 is normally worn on the wrist of the user. In embodiments in which the electronic device 100 includes the display screen module 130, the back cover 140 is arranged opposite to the display screen module 130 at the two ends of the middle frame 110 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 transmission area 140a for heart rate detection or blood oxygen detection, which is used for detecting the transmission of light. Of course, in some embodiments, the back cover 140 can be integrally formed with the middle frame 110. The electronic device 100 can include two or more biological sensors, which can be used to detect biological data such as heart rate, respiratory rate, blood pressure or body fat, etc. In some embodiments, the biological sensor can also be used to detect the motion state such as for counting steps. In other embodiments, the wearable device 10 can be a smart bracelet or the like.

[0039] In some embodiments, the back cover 140 can include a back shell 141 and a cover plate 143 connected to the back shell 141. At least part of the surface of the cover plate 143 is attached to the wrist of a user after the wearable device 10 is worn on the wrist of the user. The light transmission area 140a for heart rate detection or blood oxygen detection is arranged on the cover plate 143. The light transmission area 140a can be provided with at least two, and two or more light transmission areas 140a are arranged at intervals.

[0040] With reference to Figure 6The cover plate 143 can include a transparent substrate 1431 and an ink layer 1433 covering the inner surface of the substrate 1431, the ink layer 1433 being provided with a through hole 1433a to define a light transmission area 140a on the substrate 1431 for light transmission. The inner surface of the substrate 1431 is the surface of the substrate 1431 facing the inside of the electronic device 100, and the ink layer 1433 is arranged on the inner surface of the substrate 1431 and can play a decorative and light shielding role.

[0041] The material of the back shell 141 can be the same as that of the substrate 1431, for example, the back shell 141 and the substrate 1431 can both be glass or both be ceramic. The material of the back shell 141 can also be different from that of the substrate 1431, for example, the material of the back shell 141 is stainless steel or aluminum alloy, and the material of the substrate 1431 is glass or ceramic.

[0042] Referring to Figure 4 and Figure 5 The main board 120 of the electronic device 100 can include a light emitting device 121 and a receiving device 123. For example, the light emitting device 121 can include an LED (Light-Emitting Diode) that can emit light when powered on. When the wearable device 10 is normally worn by a user, the light emitted by the light emitting device 121 can irradiate the human skin. The receiving device 123 can include a PD (Photo-Diode) that can be used to receive light and convert it into an electrical signal. In some embodiments, the electronic device 100 includes at least two types of LEDs, one of which is used to emit red and infrared light and can be used for blood oxygen measurement, and the other of which is used to emit green light and can be used for heart rate measurement.

[0043] After the electronic device 100 is normally worn on the wrist of a user, the LED for blood oxygen measurement is powered on to emit light, at least part of the light penetrates into the skin and is reflected by the subcutaneous tissue of the human body to be emitted to the PD, the PD receives this part of the reflected light and converts it into an electrical signal, and after further processing, the blood oxygen data of the user can be obtained.

[0044] Similarly, after the electronic device 100 is normally worn on the wrist of a user, the LED for heart rate measurement is powered on to emit light, at least part of the light penetrates into the skin and is reflected by the subcutaneous tissue of the human body to be emitted to the PD, the PD receives this part of the reflected light and converts it into an electrical signal, and after further processing, the heart rate data of the user can be obtained.

[0045] It can be understood that the LED, the PD and the related control circuit for measuring the heart rate can be regarded as constituting a heart rate sensor, and the LED, the PD and the related control circuit for measuring the blood oxygen can be regarded as constituting a blood oxygen sensor.

[0046] Continuing to refer to Figure 4 andFigure 5 The electronic device 100 further comprises 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 human skin, and the cover plate 143 of the back cover 140 covers the 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 wrist of the user, the side of the wearable device 10 facing the skin of the user's wrist, at this side, at least part of the surface of the wearable device 10 is in contact with the human skin. The capacitive sensor 150 can be used to detect the wearing state of the wearable device 10, which is mainly a flexible circuit board and has a certain light transmittance. Exemplarily, when the user normally wears the wearable device 10, compared with the state of not wearing, the capacitance detected by the capacitive sensor 150 will change, so it can be used to detect the wearing state of the wearable device 10. The capacitive sensor 150 is also sometimes referred to as CAP SENSOR (Capacitive Sensor).

[0047] The capacitive sensor 150 is provided with at least two spaced-apart light transmission holes 151, and the light transmission hole 151 corresponds to the light transmission area 140a of the cover plate 143 one by one. At least one light transmission hole 151 is arranged at a position corresponding to the light emitting device 121, at least one light transmission hole 151 is arranged at a position corresponding to the receiving device 123, and at least two adjacent light transmission holes 151 are provided with a light filtering groove 153.

[0048] Reference Figure 5 In an embodiment, the light transmission hole 151 is provided as five, and all are circular holes. One of the light transmission holes 151 is arranged in the middle region of the capacitive sensor 150, and the other four light transmission holes 151 are arranged in the circumferential direction of the middle light transmission hole 151. The middle light transmission hole 151 is provided with a light emitting device 121 corresponding to it, and the light emitting device 121 corresponding to the middle light transmission hole 151 includes at least two kinds of LEDs, one of which is used to emit red light and infrared light and is used in the blood oxygen detection process, and the other is used to emit green light and is used in the heart rate detection process.

[0049] Each peripheral light transmission hole 151 arranged around the middle light transmission hole 151 is provided with a light emitting device 121 and a receiving device 123 corresponding to it, the light emitting device 121 includes an LED which can emit red light and infrared light and is used in the blood oxygen detection process; the receiving device 123 includes a PD for receiving light and converting it into an electrical signal.

[0050] For simplicity of description, the light transmission hole 151 can be divided into a first hole 151a and a second hole 151b, the first hole 151a is arranged in the middle region of the capacitive sensor 150, and the second hole 151b is arranged in the circumferential direction of the first hole 151a. Exemplarily, in the embodiment, the first hole 151a is the middle light transmission hole 151, and the second hole 151b is the peripheral light transmission hole 151. Figure 5In the illustrated embodiment, the first holes 151a have a smaller aperture than the second holes 151b, and the light beams emitted from the first holes 151a are more concentrated. Filter grooves 153 can be provided between adjacent first holes 151a and second holes 151b, and between adjacent second holes 151b.

[0051] In the process of measuring blood oxygen, the light-emitting devices 121 corresponding to the first holes 151a can emit red light and infrared light. The light rays pass through the transparent areas 140a of the cover plate 143 and irradiate the user's skin from the first holes 151a. At least part of the light rays enter the subcutaneous tissue and are 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 these reflected light rays and convert them into electrical signals. After further processing, the user can obtain the user's blood oxygen data. In other words, the cooperation of the light-emitting devices 121 of the first holes 151a and the receiving devices 123 of the four second holes 151b can form four blood oxygen detection channels. The filter grooves 153 provided between adjacent first holes 151a and second holes 151b can prevent cross light (i.e., light rays emitted from the first holes 151a to the second holes 151b without being reflected by the human subcutaneous tissue) between the first holes 151a and the second holes 151b from reducing the detection accuracy of blood oxygen.

[0052] For example, in the process of measuring blood oxygen, the light-emitting devices 121 corresponding to any second hole 151b can also emit red light and infrared light. The light rays pass through the corresponding transparent areas 140a of the cover plate 143 and irradiate the user's skin from the second holes 151b. At least part of the light rays enter the subcutaneous tissue and are 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 these reflected light rays and convert them into electrical signals. After further processing, the user can obtain the user's blood oxygen data. In other words, the cooperation of the light-emitting devices 121 of any second hole 151b and the receiving devices 123 of the other three second holes 151b can form three detection channels, i.e., a total of 4*3=12 detection channels. The filter grooves 153 provided between adjacent second holes 151b can prevent cross light (i.e., light rays emitted from one second hole 151b to another second hole 151b without being reflected by the human subcutaneous tissue) between the adjacent second holes 151b from reducing the detection accuracy of blood oxygen.

[0053] For example, in the process of measuring blood oxygen, the blood oxygen data obtained by the above (4+12)=16 detection channels can be fused to obtain the final measurement result. Alternatively, several channels with relatively high accuracy can be selected from the above 16 detection results, and then fused to obtain the final measurement result.

[0054] For example, in the process of measuring heart rate, the light emitting device 121 corresponding to the first hole 151a can emit green light, the light rays from the first hole 151a pass through the light transmission area 140a of the cover plate 143 and irradiate to the user's skin, at least part of the light rays enter the subcutaneous tissue and are reflected to the four second holes 151b by the human subcutaneous tissue. The receiving device 123 corresponding to the four second holes 151b can receive these reflected light rays and convert them into electrical signals, 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 a 4-way heart rate detection channel. The light filtering groove 153 arranged between the adjacent first hole 151a and the second hole 151b can also prevent the cross light (i.e. the light rays from the first hole 151a to the second hole 151b without being reflected by the human subcutaneous tissue) between the first hole 151a and the second hole 151b from reducing the detection accuracy of the heart rate.

[0055] In some embodiments, the light emitting device 121 can include a main light emitting device 121a and an auxiliary light emitting device 121b, the main light emitting device 121a is arranged corresponding to the first hole 151a, and the auxiliary light emitting device 121b and the receiving device 123 are arranged corresponding to the second hole 151b. The power of the main light emitting device 121a can be greater than the power of the auxiliary light emitting device 121b. When the user normally wears the wearable device 10, the main light emitting device 121a is generally located in the middle position of the width direction of the wrist, and the position thereof can be used to measure more accurate physiological parameters, and the auxiliary light emitting device 121b is used to further correct the measurement results of the main light emitting device 121a. In the embodiment in which the power of the main light emitting device 121a is greater than the power of the auxiliary light emitting device 121b, because the main light emitting device 121a can emit stronger light rays, the light filtering groove 153 arranged between the adjacent first hole 151a and the second hole 151b can have a more obvious effect on eliminating the cross light than the light filtering groove 153 arranged between the two adjacent second holes 151b.

[0056] It can be understood that in other embodiments, the aperture of the first hole 151a can be equal to the aperture of the second hole 151b. The shape of the first hole 151a can be different from the shape of the second hole 151b. For example, the first hole 151a can be a circular hole, and the second hole 151b can be a rectangular hole. In other embodiments, the light transmission hole 151 can also be a fan-shaped hole or a hole with other shapes, the number thereof can be reduced or increased, and the arrangement manner thereof can not be limited to the above disclosed arrangement manners. For example, in an embodiment, the number of the light transmission hole 151 can be eight, and can be arranged in a two-dimensional row-column shape or in a ring shape, and each light transmission hole 151 corresponds to an LED and a PD. This structure can also obtain higher heart rate or blood oxygen detection accuracy.

[0057] In some embodiments, the filter groove 153 is a through groove and is spaced apart from the light-transmitting hole 151. In other words, the filter groove 153 extends from the side of the capacitive sensor 150 closest to the human skin to the opposite side. The width of the filter groove 153 can be greater than 0.2 mm. For example, in some embodiments, the width of the filter groove 153 is 0.35 mm to 0.4 mm. For example, the width of the filter groove 153 can be 0.36 mm, 0.38 mm, or 0.39 mm, etc. Filter grooves 153 within this width range are easier to manufacture and have a better filtering effect on crosstalk between adjacent light-transmitting holes 151.

[0058] The filter slot 153 can have a suitable length, such as 10mm, 12mm, or 15mm. While ensuring the normal operation of the capacitive sensor 150, i.e., while meeting the detection requirements of the wearing state, the width and length of the filter slot 153 can be set as large as possible to filter out cross-light between adjacent light-transmitting holes 151, thereby improving the measurement accuracy of blood oxygen or heart rate.

[0059] This application does not strictly limit the shape of the filter groove 153. The filter groove 153 can be a long and narrow arc-shaped groove, such as... Figure 7a As shown. The arc-shaped groove can be either a superior arc or a inferior arc. For example, in Figure 7a In the illustrated embodiment, the filter groove 153 disposed circumferentially around the first hole 151a can be of a superior arc shape, while the filter groove 153 disposed between two adjacent second holes 151b can be of a inferior arc shape. In embodiments where all light-transmitting holes 151 are circular, the filter groove 153 between two adjacent light-transmitting holes 151 can extend a certain distance along the contour of one of the light-transmitting holes 151 to ensure the filtering of crosstalk. In other embodiments, the filter groove 153 disposed between adjacent first holes 151a and second holes 151b can be of an inferior arc shape, while the filter groove 153 disposed between two adjacent second holes 151b can be of a superior arc shape.

[0060] For example, the filter groove 153 can be a long and narrow linear groove, such as... Figure 7b As shown. Of course, the filter groove 153 can also be a zigzag groove, such as... Figure 7c As shown. Linear or zigzag grooves are relatively easy to manufacture and do not significantly affect the internal circuit layout of the capacitive sensor 150, thus resulting in high manufacturing efficiency.

[0061] In other embodiments, the filter grooves 153 between two adjacent light-transmitting holes 151 can also be multiple, and the multiple filter grooves 153 are spaced apart, such as... Figure 7dIn other words, in this embodiment, the width of the single light filtering groove 153 can be small, i.e. the single light filtering groove 153 can be in the shape of a long and narrow slit, and multiple light filtering grooves 153 can be combined to form a structure with better light filtering effect, thereby improving the effectiveness of filtering the cross light between the adjacent light transmission holes 151, and improving the detection accuracy of blood oxygen or heart rate.

[0062] In this embodiment, the single light filtering groove 153 can be an arc-shaped groove, a linear groove, a zigzag groove, or other special-shaped grooves. Of course, the multiple light filtering grooves 153 arranged between the adjacent first hole 151a and the second hole 151b can also be a combination of two or more of the arc-shaped groove, the linear groove, the zigzag groove, and the special-shaped groove. The multiple light filtering grooves 153 arranged between the adjacent two second holes 151b can also be a combination of two or more of the arc-shaped groove, the linear groove, the zigzag groove, and the special-shaped groove. For example, in the combination of multiple slits forming the light filtering groove 153, any two adjacent slit-shaped light filtering grooves 153 do not necessarily have similar shapes, and the combination of slits with obvious shape differences (such as the combination of arc-shaped grooves and linear grooves, or the combination of arc-shaped grooves and zigzag grooves) has greater randomness in light refraction or reflection, and is more effective in filtering cross light.

[0063] In other embodiments, the light filtering groove 153 can be in the shape of a small hole, and multiple small hole-shaped light filtering grooves 153 can be arranged on an arc line, or on a straight line, or on a zigzag line. For example, as shown in Figure 7e multiple small hole-shaped light filtering grooves 153 are arranged between the adjacent two second holes 151b, and the multiple small hole-shaped light filtering grooves 153 are arranged on an arc line. Of course, multiple small hole-shaped light filtering grooves 153 can also be arranged between the adjacent first hole 151a and the second hole 151b, and the multiple small hole-shaped light filtering grooves 153 can also be arranged on an arc line. The combination of multiple small hole-shaped light filtering grooves 153 can also form a structure with better light filtering effect, thereby improving the effectiveness of filtering the cross light between the adjacent light transmission holes 151, and improving the detection accuracy of blood oxygen or heart rate.

[0064] Of course, it can be understood that the light filtering groove 153 is used to filter the cross light between the adjacent light transmission holes 151, and therefore the light filtering groove 153 arranged between the adjacent two light transmission holes 151 can have more shapes or arrangement modes. For example, the multiple small hole-shaped light filtering grooves 153 between the adjacent two light transmission holes 151 can be arranged randomly, which is used to weaken or prevent the cross light between the adjacent two light transmission holes 151, and the present application will not list them one by one.

[0065] Further, in some embodiments, the light filter groove 153 can also be provided with a light absorber (not shown). The light absorber can be, but is not limited to, black ink, gray ink, or black paint, etc. Of course, the light absorber can also be a black or gray porous structure formed by bonding powders (such as graphite powder). The light absorber can better absorb light, that is, the light (i.e. cross light) from one light transmission hole 151 to another light transmission hole 151 can be absorbed by the light absorber after passing through the light absorber, thereby preventing cross light between adjacent light transmission holes 151 from reducing the detection accuracy of blood oxygen or heart rate.

[0066] Of course, it can be understood that in other embodiments, the light filter groove 153 can also be a blind groove, and the light filter groove 153 can also be provided with a light absorber. The blind groove or the blind groove combined with the light absorber can also form a structure with good light filtering effect, thereby improving the effectiveness of filtering cross light between adjacent light transmission holes 151 to improve the detection accuracy of blood oxygen or heart rate.

[0067] Referring to Figure 4 and Figure 5 , the electronic device 100 includes a light shielding member 160, which can be made of a material with good light shielding effect such as black or gray. For example, in some embodiments, the light shielding member 160 is light shielding bubble cotton. In other embodiments, the light shielding member 160 can be light shielding rubber or light shielding plastic, etc. The light shielding member 160 is used to separate the light emitting device 121 corresponding to any light transmission hole 151 from the receiver 123 corresponding to the adjacent light transmission hole 151, so as to prevent cross light between the light emitting device 121 corresponding to one light transmission hole 151 and the receiver 123 corresponding to another light transmission hole 151.

[0068] Specifically, the light shielding member 160 is arranged between the capacitive sensor 150 and the main board 120, and the light shielding member 160 is provided with at least two spaced apart through holes 161, which can correspond one-to-one to the light transmission holes 151 of the capacitive sensor 150. The light emitting device 121 and the receiver 123 arranged on the main board 120 can be protruding, and after the light shielding member 160 and the main board 120 are assembled, the light emitting device 121 and the receiver 123 can be accommodated in the through holes 161 of the light shielding member 160, thereby effectively separating the adjacent light emitting devices 121 through the light shielding member 160 to prevent cross light between the adjacent light emitting devices 121. Of course, the number of through holes 161 of the light shielding member 160 can be less than the number of light transmission holes 151 of the capacitive sensor 150, for example, the outer edge of the light shielding member 160 can be enclosed with the middle frame 110 to form a separation area, and adjacent light emitting devices 121 can be prevented from being in the same separation area to prevent cross light between adjacent light emitting devices 121.

[0069] Referring to Figure 8 and Figure 9 and combiningFigure 6 In some embodiments, the cover plate 143 corresponding to the first hole 151a can further be provided with a groove 140b surrounding the light-transmitting region 140a. For example, in an embodiment where the light-transmitting region 140a is circular, the groove 140b can be annular, 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 can extend along the edges of the light-transmitting region 140a to form a closed shape, thereby forming a shape similar to the light-transmitting region 140a.

[0070] Reference Figure 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 can be 3.2 mm, or 3.5 mm, or 4 mm, etc. 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. Illustratively, for a given light-emitting device 121, the intersection line of the beam angle of the light-emitting device 121 (i.e., the included angle formed by the boundary of a certain intensity range of the light beam of the light-emitting device 121, which is an inherent performance parameter of the light-emitting device 121) and the inner surface of the substrate 1431 can be taken as the minimum inner diameter of the groove 140b. In actual processing, the inner diameter r of the groove 140b can be greater than the above-mentioned minimum inner diameter.

[0071] The cross-sectional shape, width and depth of the groove 140b are not strictly limited in the present application. Under the condition of ensuring the use performance and structural strength of the cover plate 143, the larger the width and the deeper the depth of the groove 140b, the better the effect of eliminating cross light between adjacent light-transmitting regions 140a. For example, in an 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 of the groove 140b is smaller than that of the light-transmitting region 140a, and the thickness of the substrate 1431 at the position between adjacent light-transmitting regions 140a without the groove 140b is smaller. In combination with the above-mentioned embodiments, the thickness of the substrate 1431 at the position of the groove 140b is smaller than that of the light-transmitting region 140a, and the thickness of the substrate 1431 at the position between adjacent light-transmitting regions 140a without the groove 140b is smaller. Figure 10 The light emitted from the main light-emitting device 121a encounters the thinner substrate 1431 at the groove 140b, causing changes in the propagation path due to reflection or refraction. In other words, the setting of the groove 140b can substantially limit the part of the light emitted by the light-emitting device 121 for measurement within the area defined by the inner diameter of the groove 140b, reducing the projection width of the light emitted by the light-emitting device 121 on the flat area of the inner surface of the substrate 1431, i.e., limiting the effective light spot of the light emitted by the main light-emitting device 121a on the inner surface of the substrate 1431 to a smaller width range, thereby reducing the cross light effect between adjacent light-transmitting regions 140a.

[0072] In some embodiments, the groove wall of the groove 140b can be roughened, for example, the groove wall of the groove 140b is processed into a frosted surface or a matte surface, so that the light emitted by the main light emitting component 121a is scattered at the groove wall of the groove 140b, further reducing the light leakage between adjacent light transmission areas 140a.

[0073] In other embodiments, the groove wall of the groove 140b can be covered with light shielding ink 1435. The light shielding ink 1435 can be black or gray ink with good light absorption performance. The arrangement of the light shielding ink 1435 can further block the light leakage between adjacent light transmission areas 140a, thereby preventing the light leakage from reducing the detection accuracy of blood oxygen or heart rate.

[0074] It can be understood that in other embodiments, each second hole 151b corresponding to the light transmission area 140a can also be provided with a groove 140b surrounding the light transmission area 140a, and the groove wall of the groove 140b can also be roughened or provided with light shielding ink to reduce the light leakage between adjacent light transmission areas 140a, thereby further improving the measurement accuracy of blood oxygen or heart rate.

[0075] In related technologies, 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 transmission performance, and the substrate 1431 also has light transmission performance. During blood oxygen or heart rate measurement, part of the light emitted by the light emitting device 121 corresponding to one light transmission hole 151 can pass through the capacitive sensor 150 between adjacent light transmission holes 151 into the adjacent light transmission hole 151, and part of the light can pass through the substrate 1431 between adjacent light transmission areas 140a into the adjacent light transmission hole 151. These light lines that are not reflected by the subcutaneous tissue of the human body and are received by the receiver 123 are stray light during blood oxygen or heart rate measurement, which can reduce the accuracy of blood oxygen or heart rate measurement.

[0076] The wearable device 10 of the present application has a light filtering groove 153 between at least two adjacent light transmission holes 151, part of the light emitted by the light emitting device 121 corresponding to one light transmission hole 151 is reflected or refracted by the light filtering groove 153 when transmitting through the capacitive sensor 150 to the adjacent light transmission hole 151, thereby filtering out part of the stray light, preventing the light not reflected by the subcutaneous tissue of the human body from being directly received by the receiver 123, thereby preventing the stray light from reducing the accuracy of the measurement result, and improving the heart rate or blood oxygen measurement accuracy of the electronic device 100.

[0077] Similarly, by setting the groove 140b on the substrate 1431, roughening the groove wall of the groove 140b or setting light-blocking ink 1435 on the groove 140b, part of the light emitted by the light-emitting device 121 corresponding to one light transmission hole 151 can be prevented from being directly received by the receiver 123 without being reflected by the human subcutaneous tissue after entering the groove 140b due to the refraction or reflection of the groove wall or the absorption of the light-blocking ink 1435, so as to prevent this part of stray light from reducing the accuracy of the measurement result, thereby improving the heart rate or blood oxygen measurement accuracy of the electronic device 100.

[0078] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present disclosure as long as there is no contradiction.

[0079] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An electronic device, characterized in that, include: The motherboard includes a light-emitting device and a receiving device, wherein the light-emitting device is used to emit light to human skin; and A capacitive sensor is stacked on the motherboard, and when the electronic device is worn, the capacitive sensor is located on the side of the motherboard closer to the human skin; the capacitive sensor has at least two spaced light-transmitting holes, wherein at least one of the light-transmitting holes is positioned corresponding to the light-emitting device, at least one of the light-transmitting holes is positioned corresponding to the receiving device, and a filter groove is formed between at least two adjacent light-transmitting holes; The electronic device includes a cover plate that covers the side of the capacitive sensor away from the motherboard; the cover plate has at least two spaced-apart light-transmitting areas that correspond one-to-one with the light-transmitting holes; The light-transmitting aperture includes a first aperture and at least two second apertures, the second apertures being arranged circumferentially around the first aperture; the light-emitting device includes a main light-emitting element and an auxiliary light-emitting element, the main light-emitting element being disposed corresponding to the first aperture, the auxiliary light-emitting element and the receiving device being disposed corresponding to the second aperture, the power of the main light-emitting element being greater than the power of the auxiliary light-emitting element, and at least the filter groove is provided between the first aperture and the second aperture; The cover plate corresponding to the first hole has a groove surrounding the light-transmitting area.

2. The electronic device according to claim 1, characterized in that, The filter groove is a through groove and is spaced apart from the light-transmitting hole.

3. The electronic device according to claim 2, characterized in that, The width of the filter groove is greater than 0.2 mm.

4. The electronic device according to claim 2, characterized in that, Multiple filter slots are provided between two adjacent light-transmitting holes, and the multiple filter slots are spaced apart.

5. The electronic device according to claim 2, characterized in that, The filter slot is equipped with a light absorber.

6. The electronic device according to claim 2, characterized in that, The electronic device includes a light-shielding component disposed between the capacitive sensor and the motherboard to isolate the light-emitting device corresponding to any of the light-transmitting holes from the receiving device corresponding to the adjacent light-transmitting holes.

7. The electronic device according to claim 6, characterized in that, The light-shielding component has at least two spaced through holes, which are used to accommodate at least one of the light-emitting device and the receiving device.

8. The electronic device according to claim 1, characterized in that, The filter groove is provided between two adjacent second holes.

9. The electronic device according to claim 1, characterized in that, The groove walls are covered with light-blocking ink.

10. The electronic device according to claim 1, characterized in that, The cover plate includes a transparent substrate and an ink layer covering the surface of the substrate. The ink layer has through holes to define the light-transmitting area on the substrate, and the groove is provided on the substrate corresponding to the first hole.

11. The electronic device according to claim 1, characterized in that, The inner diameter of the groove is greater than 3 mm.

12. A wearable device, characterized in that, The device includes a strap assembly and an electronic device as described in any one of claims 1-11, wherein the strap assembly is connected to the electronic device and is used to wear the electronic device on a user's wrist.

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