CN216257071U - Electronic equipment and wearable equipment - Google Patents

Abstract

The application relates to an electronic device and a wearable device. The mainboard includes emitting device and receiving device, and capacitive sensor superposes in the mainboard, and when electronic equipment was worn, capacitive sensor was located one side that is close to human skin of mainboard, and capacitive sensor sets up the logical unthreaded hole that two at least intervals set up, and wherein the position that at least one leads to the unthreaded hole corresponds the setting with emitting device, and the position that at least one leads to the unthreaded hole corresponds the setting with receiving device, has seted up the light filtering groove between two at least adjacent logical unthreaded hole. Above-mentioned electronic equipment, the partial light that emitting device in a logical unthreaded hole sent, when seeing through capacitive sensor to adjacent logical unthreaded hole transmission, the light filter tank can play the filtering effect to this partial light, prevents that this part from not directly being received by receiving device by the light of skin reflection to this partial light reduces measuring result's precision, with the measurement accuracy who promotes rhythm of the heart or blood oxygen.

Description

Electronic equipment and wearable equipment

Technical Field

The application relates to the technical field of wearable equipment, in particular to electronic equipment and wearable equipment.

Background

Wearable devices such as smartwatches, smartbands, etc. may generally be equipped with a heart rate sensor or blood oxygen sensor for detecting a user's heart rate or blood oxygen data to provide health coaching functions. The heart rate sensor and the blood oxygen sensor generally emit light to the human body through the light emitting device, and receive reflected light of human tissues through the receiving device, so as to obtain measurement results. However, some of the light emitted from the light emitting device is directly received by the receiving device after being reflected or refracted inside the wearable device, and the light which is not reflected by the subcutaneous tissue of the human body, i.e., the light received by the receiving device, may reduce the accuracy of the measurement result.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application discloses in a first aspect an electronic device to promote wearable equipment's heart rate or blood oxygen detection precision.

An electronic device, comprising:

the main board comprises a light-emitting device and a receiving device, wherein the light-emitting device is used for emitting light to the skin of a human body; and

the capacitive sensor is superposed on the mainboard and is positioned on one side of the mainboard close to the skin of the human body when the electronic equipment is worn; the capacitive sensor is provided with at least two light through holes which are arranged at intervals, wherein at least one light through hole is arranged corresponding to the light-emitting device, at least one light through hole is arranged corresponding to the receiving device, and a light filtering groove is formed between at least two adjacent light through holes.

In the electronic device, the capacitive sensor is stacked on one side of the main board close to the skin of the human body, namely, the capacitive sensor is stacked on one side of the main board close to the skin of the user. Because the filter tank has been seted up between at least two adjacent logical unthreaded hole, some in the light that luminescent device in a logical unthreaded hole sent, when permeating capacitive sensor and propagating to adjacent logical unthreaded hole, the filter tank can produce reflection or refraction to this part light, thereby play the effect of this part stray light of filtering, prevent that this part is not directly received by receiving device by the light of human subcutaneous tissue reflection, thereby can prevent that this part light from reducing measuring result's precision, with the measurement accuracy of heart rate or the blood oxygen that promotes electronic equipment.

The embodiment of the application discloses in the second aspect a wearable equipment to promote wearable equipment's rhythm of the heart or blood oxygen detection precision.

A wearable device comprises the electronic device and a strap assembly, wherein the strap assembly is connected to the electronic device and used for wearing the electronic device to the wrist of a user.

Above-mentioned wearable equipment, electronic equipment's capacitive sensor superposes in the one side of being close to human skin of mainboard, and capacitive sensor superposes in the one side of being close to user's skin of mainboard promptly. Because the filter tank has been seted up between at least two adjacent logical unthreaded hole, some in the light that luminescent device in a logical unthreaded hole sent, when permeating capacitive sensor and propagating to adjacent logical unthreaded hole, the filter tank can produce reflection or refraction to this part light, thereby play the effect of this part stray light of filtering, prevent that this part is not directly received by receiving device by the light of human subcutaneous tissue reflection, thereby can prevent that this part light from reducing measuring result's precision, with the measurement accuracy of heart rate or the blood oxygen that promotes electronic equipment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

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 of an embodiment;

FIG. 3 is a schematic diagram of an electronic device according to an embodiment after assembling a rear cover, a capacitive sensor, a light shielding member and a main board;

FIG. 4 is an exploded view of the rear cover, capacitive sensor, light shield, and main board of the electronic device of FIG. 3;

FIG. 5 is another exploded view of the rear cover, capacitive sensor, light shield, and main board of the electronic device of FIG. 3;

FIG. 6 is a schematic diagram of a cover plate of a back cover of an electronic device according to an embodiment;

FIGS. 7a-7e are schematic illustrations of the shape and arrangement of filter grooves of a capacitive sensor of an electronic device according to some embodiments;

FIG. 8 is a front view of a substrate of a back cover of an electronic device of an embodiment;

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

fig. 10 is a sectional view of the electronic device after the rear cover, the capacitive sensor, the light-shielding member, and the main board are assembled according to the embodiment.

Reference numerals:

10. wearable device 100, electronic device 103, card slot

110. Middle frame 120, main board 121 and light-emitting device

121a, a main light emitting member 121b, an auxiliary light emitting member 123, and a receiving member

130. Display screen module 131, protection plate 140 and rear cover

140a, a light-transmitting region 140b, a groove 141, and a rear case

143. Cover plate 1431, substrate 1433, ink layer

1433a, through-hole 1435, light-shielding ink 150, and capacitance sensor

151. A light-passing hole 151a, a first hole 151b, and a second hole

153. Light filtering groove 160, light shielding piece 161 and through hole

200. Strap assembly 220, strap

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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 being mounted to the electronic device 100 and the electronic device 100 being wearable to a wrist of a user 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, wherein the middle frame 110 has a receiving cavity, and the electronic components such as the main board 120 and the battery are disposed in the receiving cavity. The middle frame 110 may be made of non-metal materials such as plastic, rubber, silica gel, wood, ceramic or glass, and the middle frame 110 may also be made of metal materials such as stainless steel, aluminum alloy or magnesium alloy. The middle frame 110 may also be a metal injection-molded part, that is, the structural rigidity of the middle frame 110 is ensured by using a metal material, and the inner surface of the metal body is formed with a protrusion, a groove, a threaded hole and other structures for assembling and positioning by injection molding.

In some embodiments, wearable device 10 is the smart watch, accepts the chamber and is used for setting up electronic components such as battery, mainboard 120, display screen module 130, and electronic components such as the treater of wearable device 10, memory cell, communication module can be integrated to mainboard 120, and the battery can be mainboard 120, display screen module 130 and other electronic components power supplies. 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 a user. The Display module 130 may further include a Display screen (not shown) and a protection plate 131 covering the Display screen, the Display screen may be an LCD (Liquid Crystal Display) screen or an OLED (Organic Light-Emitting Diode) screen, and the protection plate 131 may be made of glass or sapphire. The protection plate 131 is transparent and has relatively high light transmittance, for example, the light transmittance of the protection plate 131 is over 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 substantially rectangular frame-shaped, and four corners of the rectangle may be processed into arc transition through a chamfering process, so that the wearable device 10 has good appearance characteristics. In other embodiments, the middle frame 110 may have a circular frame shape. The side surface of the middle frame 110, i.e., the surface facing away from the receiving cavity, may be provided with a fitting structure for mounting the strap assembly 200, and the strap assembly 200 can form a reliable connection with the middle frame 110 through the fitting structure of the middle frame 110 to reliably wear the electronic device 100 to the wrist of the user. In some embodiments, strap assembly 200 can also be relatively easily detached from middle frame 110 to allow a user to easily replace strap assembly 200. For example, a user may purchase various styles of strap assemblies 200 and replace the strap assemblies 200 according to a use scenario to improve convenience of use. For example, a user may use a more formal strap assembly 200 in formal situations and a casual style strap assembly 200 in casual recreational situations.

With continued reference to fig. 1 and 2, in some embodiments, the strap assembly 200 includes two strap sections 220 (one of which is shown), the two opposite ends of the electronic device 100 are respectively provided with a slot 103 for mounting the strap 220, each of the two strap sections 220 has one end connected to the electronic device 100, and the ends of the two strap sections 220 facing away from the electronic device 100 can be fastened together to form a receiving space for the electronic device 100 to be worn on the wrist of the user through the strap assembly 200. In 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, the other end of the electronic device 100 may be provided with a buckle for the strap 220 to pass through, the free end of the strap 220 may pass through the buckle and be fixed to another position of the strap 220 to form a receiving space, and the size of the receiving space is easily adjusted to facilitate wearing by a user.

Referring to fig. 3, 4 and 5, the electronic device 100 may include a rear cover 140 coupled to the middle frame 110, at least a portion of a surface of the rear cover 140 conforming to a wrist of a user after the wearable device 10 is normally worn on the wrist of the user. In an embodiment where the electronic device 100 includes the display module 130, the rear cover 140 and the display module 130 are disposed at two ends of the middle frame 110 opposite to each other and respectively cover two ends of the accommodating cavity. The rear cover 140 may be made of glass, ceramic, or plastic, and the rear cover 140 may be provided with a transparent area 140a for heart rate detection or blood oxygen detection, and the transparent area 140a is used for detecting light transmission. Of course, in some embodiments, rear cover 140 may be integrally formed with center frame 110. The electronic device 100 may include two or more biosensors that may be used to detect biological data such as heart rate, respiratory rate, blood pressure, or body fat. In some embodiments, the biosensor may also be used to detect a state of motion, for example, for step counting. In other embodiments, the wearable device 10 may be a smart band or the like.

In some embodiments, the rear cover 140 may include a rear case 141 and a cover plate 143, and the cover plate 143 is connected to the rear case 141. After the wearable device 10 is worn on the user's wrist, at least a portion of the surface of the cover plate 143 conforms to 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 disposed, and more than two light-transmitting regions 140a are spaced apart.

Referring to fig. 6, the cover plate 143 may include a transparent substrate 1431 and an ink layer 1433 covering an inner surface of the substrate 1431, wherein the ink layer 1433 is provided with a through hole 1433a to define a light-transmitting area 140a for light to pass through on the substrate 1431. The inner surface of the substrate 1431 is a surface of the substrate 1431 facing the inside of the electronic device 100, and the ink layer 1433 is disposed on the inner surface of the substrate 1431 and can perform decoration and light shielding functions.

The material of the back cover 141 may be the same as that of the substrate 1431, for example, the back cover 141 and the substrate 1431 may be both made of glass or ceramic. The material of the rear case 141 may be different from that of the substrate 1431, for example, the material of the rear case 141 is stainless steel or aluminum alloy, and the material of the substrate 1431 is glass or ceramic.

Referring to fig. 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) that emits Light when power is applied. When the user normally wears the wearable device 10, the light emitted from the light emitting device 121 may be irradiated to the skin of the human body. The receiving device 123 may include a PD (Photo-Diode) which can be used to receive light and convert it into an electrical signal. In some embodiments, electronic device 100 includes at least two LEDs, one of which is configured to emit red and infrared light, such LEDs being configured for oximetry; another LED is used to emit green light, which can be used for heart rate measurement.

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

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

It will be appreciated that the LED, PD and associated control circuitry for measuring heart rate may be considered to constitute a heart rate sensor, and the LED, PD and associated control circuitry for measuring blood oxygen may be considered to constitute a blood oxygen sensor.

With continued reference to fig. 4 and fig. 5, the electronic device 100 further includes a capacitive sensor 150, the capacitive sensor 150 is stacked on the main board 120, and when the electronic device 100 is worn, the capacitive sensor 150 is located on a side of the main board 120 close to the skin of the human body, and the cover plate 143 of the rear 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 understood simply 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 wrist of the user where at least part of the surface of the wearable device 10 is in contact with the skin of the human body. The capacitive sensor 150 may be used to detect the wearing state of the wearable device 10, and its main portion is a flexible circuit board, which has a certain light transmittance. Illustratively, when the user normally wears the wearable device 10, the capacitance detected by the capacitance sensor 150 may change compared to the unworn state, and thus may be used to detect the wearing state of the wearable device 10. Capacitive sensor 150 is also sometimes referred to as a capacitive sensor.

The capacitive sensor 150 has at least two light holes 151 disposed at intervals, and the light holes 151 correspond to the light-transmitting regions 140a of the cover plate 143 one to one. The position of at least one light-passing hole 151 corresponds to the light-emitting device 121, the position of at least one light-passing hole 151 corresponds to the receiving device 123, and a light-filtering groove 153 is formed between at least two adjacent light-passing holes 151.

Referring to fig. 5, in one embodiment, five light passing holes 151 are provided, and are all round holes. One of the light-passing holes 151 is disposed in the middle region of the capacitive sensor 150, and the other four light-passing holes 151 are arranged in the circumferential direction of the middle light-passing hole 151. The light emitting devices 121 are correspondingly arranged on the middle light through hole 151, and the light emitting devices 121 corresponding to the middle light through hole 151 at least comprise two LEDs, wherein one LED is used for emitting red light and infrared light and used for the blood oxygen detection process, and the other LED is used for emitting green light and used for the heart rate detection process.

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

For simplicity, the light passing hole 151 may be divided into a first hole 151a and a second hole 151b, the first hole 151a is disposed in a middle region of the capacitive sensor 150, and the second hole 151b is arranged in a circumferential direction of the first hole 151 a. Illustratively, in the embodiment shown in fig. 5, the aperture of the first hole 151a is slightly smaller than that of the second hole 151b, and the light beam emitted from the first hole 151a is more concentrated. The filter grooves 153 may be disposed between adjacent first holes 151a and second holes 151b, and between adjacent second holes 151 b.

In the process of measuring blood oxygen of the electronic device 100, the light emitting device 121 corresponding to the first hole 151a can emit red light and infrared light, the light irradiates the skin of the user through the light transmitting region 140a of the cover plate 143 from the first hole 151a, and at least a portion of the light enters the subcutaneous tissue and is reflected to the four second holes 151b by the subcutaneous tissue of the human body. The receiving devices 123 corresponding to the four second holes 151b can receive the reflected light and convert the reflected light into electrical signals, and the user can obtain the blood oxygen data of the user through further processing. In other words, the light emitting device 121 of the first hole 151a and the receiving device 123 of the four second holes 151b can cooperate to form a 4-way blood oxygen detecting channel. The light filtering grooves 153 disposed between the adjacent first and second holes 151a and 151b can prevent crosstalk between the first and second holes 151a and 151b (i.e., light emitted from the first hole 151a to the second hole 151b without being reflected by subcutaneous tissue of the human body) from degrading blood oxygen detection accuracy.

For example, in the blood oxygen measurement process, the light emitting device 121 corresponding to any one of the second holes 151b may also emit red light and infrared light, and the light from the second hole 151b is irradiated to the skin of the user through the corresponding light transmitting region 140a of the cover plate 143, and at least a portion of the light enters the subcutaneous tissue and is reflected by the subcutaneous tissue of the human body to the other three second holes 151 b. The receiving devices 123 corresponding to the other three second holes 151b can receive the reflected light and convert the reflected light into electrical signals, and the user can obtain the blood oxygen data of the user through further processing. In other words, the light emitting devices 121 of any one second hole 151b and the receiving devices 123 of the other three second holes 151b cooperate to form 3 detection channels, i.e., 4 × 3 — 12 detection channels. The light-filtering grooves 153 disposed between two adjacent second holes 151b can prevent crosstalk between two adjacent second holes 151b (i.e., light emitted from one second hole 151b to the other second hole 151b and not reflected by subcutaneous tissue of the human body) from degrading blood oxygen detection accuracy.

Illustratively, in the process of measuring blood oxygen, blood oxygen data obtained by the above-mentioned (4+12) ═ 16-way detection channel detection may be fused to obtain a final measurement result. Or selecting several paths with relatively high accuracy from the 16 paths of detection results, and fusing to obtain a final measurement result.

Illustratively, in the process of measuring the heart rate, the light emitting device 121 corresponding to the first hole 151a can emit green light, the light irradiates the skin of the user through the light-transmitting region 140a of the cover plate 143 from the first hole 151a, and at least a portion of the light enters the subcutaneous tissue and is reflected by the subcutaneous tissue of the human body to the four second holes 151 b. The receiving devices 123 corresponding to the four second holes 151b can receive the reflected light and convert the reflected light into electrical signals, and the heart rate data of the user can be obtained through further processing. In other words, the cooperation of the light emitting device 121 of the first aperture 151a and the receiving device 123 of the second aperture 151b may form a 4-way heart rate detection channel. The filter groove 153 disposed between the adjacent first and second holes 151a and 151b can also prevent crosstalk between the first and second holes 151a and 151b (i.e., light emitted from the first hole 151a to the second hole 151b without being reflected by subcutaneous tissue of the human body) from degrading the detection accuracy of the heart rate.

In some embodiments, the light emitting device 121 may include a main light emitting member 121a and an auxiliary light emitting member 121b, the main light emitting member 121a being disposed corresponding to the first hole 151a, and the auxiliary light emitting member 121b and the receiving device 123 being disposed corresponding to the second hole 151 b. The power of the main light emitting member 121a may be greater than that of the auxiliary light emitting member 121 b. When the user normally wears the wearable device 10, the primary light-emitting element 121a is generally located at the middle position of the wrist in the width direction, and the position of the primary light-emitting element 121a can be used for measuring to obtain more accurate physiological parameters, and the secondary light-emitting element 121b is used for further correcting the measurement result of the primary light-emitting element 121 a. In the embodiment in which the power of the primary light emitting member 121a is greater than that of the secondary light emitting member 121b, since the primary light emitting member 121a can emit stronger light, the light filtering groove 153 disposed between the adjacent first and second holes 151a and 151b may have a more significant effect of eliminating crosstalk than the light filtering groove 153 disposed between the adjacent second holes 151 b.

It is understood that in other embodiments, the aperture of the first hole 151a may be equal to the aperture of the second hole 151 b. The shape of the first hole 151a may be different from that of the second hole 151 b. 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 passing holes 151 may also be fan-shaped holes or holes with other shapes, and the number of the holes 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 passing holes 151 may be eight, and may be arranged in a two-dimensional row and column manner or in a ring manner, and each light passing hole 151 is provided with an LED and a PD correspondingly. This configuration also allows for higher heart rate or blood oxygen detection accuracy.

In some embodiments, the filter slots 153 are through slots and are spaced apart from the light passing holes 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 grooves 153 may be greater than 0.2 mm. For example, in some embodiments, filter slots 153 are 0.35mm to 0.4mm wide. For example, the width of the filter slot 153 may be 0.36mm, or 0.38mm, or 0.39mm, etc. The filter grooves 153 with such a width range are easy to process, and have a good filtering effect on crosstalk between adjacent light-passing holes 151.

The filter slots 153 may have a suitable length, for example 10mm, or 12mm, or 15mm, etc. Under the condition of guaranteeing that capacitive sensor 150 normally works, under the condition that capacitive sensor 150 satisfies the detection requirement of wearing state promptly, the width and the length of light filter 153 can set up as far as possible to the optical crosstalk between the adjacent clear aperture 151 of filtering as far as possible, and then promote the measurement accuracy of blood oxygen or heart rate.

The shape of the filter grooves 153 is not strictly limited in the present application. The filter slots 153 may be elongated arc-shaped slots, as shown in FIG. 7 a. The arc-shaped groove can be a preferred arc shape or a poor arc shape. For example, in the embodiment shown in fig. 7a, the filter grooves 153 disposed in the circumferential direction of the first holes 151a may have a major arc shape, and the filter grooves 153 disposed between two adjacent second holes 151b may have a minor arc shape. In the embodiment where the light passing holes 151 are all circular holes, the filter slot 153 between two adjacent light passing holes 151 may extend a distance along the contour of one of the light passing holes 151 to ensure filtering out of crosstalk. In other embodiments, the filter grooves 153 disposed between adjacent first holes 151a and second holes 151b may have a minor arc shape, and the filter grooves 153 disposed between adjacent two second holes 151b may have a major arc shape.

As another example, filter slot 153 may be an elongated linear slot, as shown in FIG. 7 b. Of course, the filter slots 153 may also be polygonal-line slots, as shown in FIG. 7 c. The linear groove or the polygonal groove is easy to process, and the wiring layout inside the capacitive sensor 150 is not greatly affected, so that the processing efficiency is high.

In other embodiments, the filter grooves 153 between two adjacent light passing holes 151 may be further disposed in a plurality, and the plurality of filter grooves 153 are spaced apart, as shown in fig. 7 d. In other words, in this embodiment, the width of the single filtering groove 153 may be smaller, that is, the single filtering groove 153 may be in a narrow slit shape, and the plurality of filtering grooves 153 may be combined to form a structure with a better filtering effect, so as to improve the effectiveness of filtering crosstalk between adjacent light-passing holes 151, and thus improve the detection accuracy of blood oxygen or heart rate.

In this embodiment, the single filtering groove 153 may be an arc-shaped groove, a linear groove, a polygonal groove or other irregular-shaped grooves. Of course, the plurality of filter grooves 153 disposed between the adjacent first holes 151a and second holes 151b may be a combination of two or more of arc-shaped grooves, linear grooves, polygonal-shaped grooves, and irregular-shaped grooves. The plurality of filter grooves 153 provided between the two adjacent second holes 151b may be a combination of two or more of arc-shaped grooves, linear grooves, polygonal-line grooves, and irregular-shaped grooves. Illustratively, in the combination of the filter slots 153 formed by a plurality of slits, any two adjacent slit-shaped filter slots 153 do not need to have similar shapes, and the slit combination with obvious difference in shape (for example, the combination of the arc-shaped slot and the linear slot, or the combination of the arc-shaped slot and the polygonal slot) has greater randomness for refraction or reflection of light and is more effective in filtering out cross-talk.

In other embodiments, the filter grooves 153 may be small-hole-shaped, and a plurality of small-hole-shaped filter grooves 153 may be arranged substantially on an arc line, or substantially on a straight line, or substantially on a folding line. Illustratively, as shown in fig. 7e, a plurality of small-hole-shaped filter grooves 153 are disposed between two adjacent second holes 151b, and the plurality of small-hole-shaped filter grooves 153 are substantially arranged on an arc line. Of course, a plurality of small-hole-shaped filter grooves 153 may be provided between the adjacent first holes 151a and second holes 151b, and the plurality of small-hole-shaped filter grooves 153 may be arranged substantially on one arc line. The combination of the filter grooves 153 with a plurality of small holes can also form a structure with a good filter effect, so that the effectiveness of filtering light crosstalk between adjacent light through holes 151 is improved, and the detection accuracy of blood oxygen or heart rate is improved.

Of course, it is understood that the filter grooves 153 are used to filter the crosstalk between adjacent light-passing holes 151, and thus the filter grooves 153 disposed between two adjacent light-passing holes 151 may have more shapes or arrangements. For example, the plurality of small-hole-shaped light-filtering grooves 153 between two adjacent light-passing holes 151 may be randomly arranged, which is sufficient to weaken or prevent crosstalk between two adjacent light-passing holes 151, and this is not listed in this application.

Further, in some embodiments, a light absorber (not shown) may be disposed in the filter groove 153. The light absorber may be made of, but not limited to, black ink, gray ink, black paint, or the like. Of course, the light absorber may be a black or gray porous structure formed by bonding powders (e.g., graphite powder). The light absorber can absorb light well, that is, light (i.e. crosstalk) emitted from one light through hole 151 to another light through hole 151 can be absorbed by the light absorber after passing through the light absorber, thereby preventing crosstalk between adjacent light through holes 151 from reducing blood oxygen or heart rate detection accuracy.

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

With reference to fig. 4 and 5, the electronic device 100 includes a light shielding member 160, and the light shielding member 160 may be made of a material with a good light shielding effect, such as black or gray. For example, in some embodiments, the light shield 160 is a light shield foam. In other embodiments, the light shielding member 160 may be a light shielding rubber or a light shielding plastic. The light shielding member 160 is used to isolate the light emitting device 121 corresponding to any light passing hole 151 from the receiving device 123 corresponding to the adjacent light passing hole 151, so as to prevent crosstalk between the light emitting device 121 corresponding to one light passing hole 151 and the receiving device 123 corresponding to the other light passing hole 151.

Specifically, the light shielding member 160 is disposed between the capacitive sensor 150 and the main board 120, the light shielding member 160 is provided with at least two through holes 161 disposed at intervals, and the through holes 161 may correspond to the light passing holes 151 of the capacitive sensor 150 one to one. The light emitting devices 121 and the receiving devices 123 disposed on the main board 120 may be protruded, and after the light shielding member 160 is assembled with the main board 120, the light emitting devices 121 and the receiving devices 123 may be accommodated in the through holes 161 of the light shielding member 160, so that the light shielding member 160 effectively separates the adjacent light emitting devices 121 to prevent crosstalk between the adjacent light emitting devices 121. Of course, the number of the through holes 161 of the light shielding member 160 may be less than the number of the through holes 151 of the capacitive sensor 150, for example, the outer edge of the light shielding member 160 may surround the middle frame 110 to form a blocking area, and the adjacent light emitting devices 121 may be prevented from being in the same blocking area, i.e., crosstalk between the adjacent light emitting devices 121 may be prevented.

Referring to fig. 8 and 9 in combination with fig. 6, in some embodiments, the cover plate 143 corresponding to the first hole 151a may further have a groove 140b surrounding the light-transmitting region 140 a. For example, in the embodiment where the light-transmitting regions 140a are circular, the grooves 140b may be annular, and the grooves 140b are disposed around the light-transmitting regions 140a corresponding to the first holes 151 a. In embodiments where the light-transmitting region 140a has a rectangular or fan-like shape, the groove 140b may extend along the edge of the light-transmitting region 140a to form a closed shape, thereby forming a shape similar to the light-transmitting region 140 a.

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 3.2mm, or 3.5mm, or 4mm, 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 of the beam angle of the light-emitting device 121 (i.e., the angle formed by the light beam of the light-emitting device 121 at the boundary of a certain intensity range, which is an intrinsic performance parameter of the light-emitting device 121) and the inner surface of the substrate 1431 may be taken as the minimum inner diameter of the groove 140 b. In the actual machining process, the inner diameter r of the groove 140b may be larger than the minimum inner diameter.

The cross-sectional shape, width and depth of the groove 140b are not strictly limited, and the larger the width and the deeper the depth of the groove 140b are under the condition of ensuring the service performance and the structural strength of the cover plate 143, the better the cross-talk elimination effect between the adjacent light-transmitting areas 140a is. For example, in one embodiment, the groove 140b is arcuate in cross-section, with an inner diameter r of 3.2mm, a width d of 0.8mm, and a depth h of 0.5 mm. The thickness of the substrate 1431 at the position of the groove 140b is smaller than the thickness of the light-transmitting regions 140a and the thickness of the substrate 1431 at the position of the adjacent light-transmitting regions 140a where the groove 140b is not opened. Referring to fig. 10, the light emitted from the primary light-emitting member 121a encounters the substrate 1431 with a small thickness at the groove 140b, and the propagation path is changed due to reflection or refraction. In other words, the groove 140b is configured to substantially limit the portion of the light emitted from the light emitting device 121 for measurement within the area defined by the inner diameter of the groove 140b, so as to reduce the projection width of the light emitted from the light emitting device 121 on the flat area of the inner surface of the substrate 1431, i.e., to limit the effective light spot of the light emitted from the primary light emitting device 121a on the inner surface of the substrate 1431 within a smaller width, thereby reducing the crosstalk between adjacent light-transmitting regions 140 a.

In some embodiments, the groove walls of the groove 140b may be roughened, for example, the groove walls of the groove 140b are processed into a frosted surface or a matte surface, so that the light emitted from the primary light-emitting member 121a can diffuse at the groove walls of the groove 140b, and further reduce crosstalk between adjacent light-transmitting regions 140 a.

In other embodiments, the walls of the groove 140b may be covered with a light-blocking ink 1435. The light-shielding ink 1435 may be a black or gray ink, which has a good light-absorbing property. The light-shielding ink 1435 may be configured to further block crosstalk between adjacent light-transmitting regions 140a, so as to prevent crosstalk from reducing the blood oxygen or heart rate detection accuracy.

It is understood that, in other embodiments, the light-transmitting area 140a corresponding to each second hole 151b may also be provided with a groove 140b surrounding the light-transmitting area 140a, and the wall of the groove 140b may also be roughened or provided with a light-shielding ink, so as to reduce crosstalk between adjacent light-transmitting areas 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 optical transparency, and the substrate 1431 also has an optical transparency. In the process of blood oxygen or heart rate measurement, a part of light emitted from the light emitting device 121 corresponding to one light transmitting hole 151 can enter the adjacent light transmitting hole 151 through the capacitive sensor 150 between the adjacent light transmitting holes 151, and a part of light can enter the adjacent light transmitting hole 151 through the substrate 1431 between the adjacent light transmitting regions 140a, and the light which is not reflected by the subcutaneous tissue of the human body, i.e., received by the receiving device 123 belongs to stray light in the process of blood oxygen or heart rate measurement, which may reduce the accuracy of blood oxygen or heart rate measurement.

The wearable device 10 of the application, through having seted up filtering groove 153 between at least two adjacent logical unthreaded hole 151, some light that the luminescent device 121 that a logical unthreaded hole 151 corresponds sent, when permeating through capacitive sensor 150 and propagating to adjacent logical unthreaded hole 151, filtering groove 153 can produce reflection or refraction to this some light, thereby play this partial stray light's of filtering effect, prevent that this partial light that does not reflect by human subcutaneous tissue is directly received by receiving element 123, thereby can prevent this partial stray light from reducing the precision of measurement result, with heart rate or the blood oxygen measurement accuracy that promotes electronic equipment 100.

Similarly, by providing the groove 140b on the substrate 1431, roughening the groove wall of the groove 140b or providing the light-shielding ink 1435 on the groove 140b, a part of light emitted by the light-emitting device 121 corresponding to one light-passing hole 151 can be prevented from being directly received by the receiving device 123 without being reflected by the subcutaneous tissue of the human body due to the refraction or reflection of the groove wall or due to the absorption of the light-shielding ink 1435 after entering the groove 140b, so that the precision of the measurement result can be prevented from being reduced by the part of stray light, and the heart rate or blood oxygen measurement precision of the electronic device 100 can be improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (15)

1. An electronic device, comprising:

the main board comprises a light-emitting device and a receiving device, wherein the light-emitting device is used for emitting light to the skin of a human body; and

the capacitive sensor is superposed on the mainboard and is positioned on one side of the mainboard close to the skin of the human body when the electronic equipment is worn; the capacitive sensor is provided with at least two light through holes which are arranged at intervals, wherein at least one light through hole is arranged corresponding to the light-emitting device, at least one light through hole is arranged corresponding to the receiving device, and a light filtering groove is formed between at least two adjacent light through holes.

2. The electronic device of claim 1, wherein the light filtering groove is a through groove and is spaced apart from the light through hole.

3. The electronic device of claim 2, wherein the width of the filter slot is greater than 0.2 mm.

4. The electronic device according to claim 2, wherein the filter grooves between two adjacent light passing holes are provided in a plurality, and the filter grooves are provided at intervals.

5. The electronic device of claim 2, wherein a light absorber is disposed in the light-filtering groove.

6. The electronic device according to claim 2, wherein the electronic device comprises a light shielding member, and the light shielding member is disposed between the capacitive sensor and the main board to isolate the light emitting device corresponding to any one of the light passing holes from the receiving device corresponding to the adjacent light passing hole.

7. The electronic device of claim 6, wherein the light shielding member defines at least two spaced through holes for receiving at least one of the light emitting device and the receiving device.

8. The electronic device of any of claims 1-7, comprising a cover plate covering a side of the capacitive sensor remote from the motherboard; the cover plate is provided with at least two light transmitting areas which are arranged at intervals, and the light transmitting areas correspond to the light through holes one to one.

9. The electronic device according to claim 8, wherein the light passing hole includes a first hole and at least two second holes, the second holes being arranged in a circumferential direction of the first hole; the light emitting device comprises a main light emitting piece and an auxiliary light emitting piece, the main light emitting piece corresponds to the first hole, and the auxiliary light emitting piece corresponds to the receiving device.

10. The electronic device of claim 9, wherein the light-filtering grooves are disposed between the first hole and the second hole and between two adjacent second holes.

11. The electronic device of claim 9, wherein the cover plate corresponding to the first hole is provided with a groove surrounding the light-transmitting area.

12. The electronic device of claim 11, wherein walls of the recess are covered with a light blocking ink.

13. The electronic device of claim 11, wherein the cover plate comprises a transparent substrate and an ink layer covering the surface of the substrate, the ink layer has a through hole to define the transparent region on the substrate, and the recess is disposed on the substrate corresponding to the first hole.

14. The electronic device of claim 11, wherein an inner diameter of the groove is greater than 3 mm.

15. A wearable device comprising the electronic device of any of claims 1-14 and a strap assembly connected to the electronic device for wearing the electronic device to a wrist of a user.

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