Detection device and electronic equipment

Abstract

The embodiment of the invention provides a detection device and electronic equipment, relates to the technical field of health data detection, and is used for solving the problem of relatively low health detection data precision caused by complex organization structure of a to-be-detected part of a user. In the detection device, a first photoelectric converter is arranged between every two adjacent first light sources, and a second light source is located in a detection area defined by the multiple first light sources and the multiple first photoelectric converters. A first distance H1 and a second distance H2 are respectively arranged between the first light source and at least two of the first photoelectric converters. A third distance H3 and a fourth distance H4 are respectively arranged between the second light source and at least two of the first photoelectric converters. A first light source, a second light source and a first photoelectric converter are distributed in the distribution area of the detection device. A PPG module can be formed between each light source and the corresponding photoelectric converter, the distances between the light sources and the photoelectric converters are different, and the effective depth of the detected skin can be different.

Description

Technical Field

[0001] The present application relates to the technical field of health data detection, and in particular to a detection device and electronic equipment. Background Art

[0002] As people pay more and more attention to their own health, users have higher and higher requirements for the functions of electronic devices. Devices with human health sign detection functions can detect users' health sign data, such as heart rate and blood oxygen, so that users can understand their physical condition at any time and prevent diseases. At present, the user's fingers can be clamped by a finger-clip oximeter to detect blood oxygen on the finger part. However, the above detection method makes the user's fingertips unable to move normally and has a sense of squeezing, and it is difficult to achieve real-time detection. In order to solve the above problems, wearable devices can be used to detect blood oxygen on other parts of the user, such as the wrist. However, since the tissue structure of the wrist is more complex than that of the fingertips, the accuracy of blood oxygen detection is reduced. Summary of the invention

[0003] The present application provides a detection device and an electronic device for solving the problem that the accuracy of health detection data is low due to the complex tissue structure of the user's tested part.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In one aspect of the present application, a detection device is provided, which includes at least three first light sources, at least three first photoelectric converters, and at least two second light sources. Among them, at least one first photoelectric converter is arranged between two adjacent first light sources, and at least three first light sources and at least three first photoelectric converters enclose a detection area. In addition, the second light source is arranged in the detection area. Among them, within the same distribution area, there is a first distance H1 between the first light source and at least one first photoelectric converter. There is a second distance H2 between the first light source and at least one first photoelectric converter outside the distribution area. Within the same distribution area, there is a third distance H3 between the second light source and at least one first photoelectric converter. There is a fourth distance H4 between the second light source and at least one first photoelectric converter outside the distribution area. Any two of the first distance H1, the second distance H2, the third distance H3 and the fourth distance H4 are different. On this basis, the detection device has at least two distribution areas, and the first light source, the second light source and the first photoelectric converter are distributed in the distribution area. Among them, the first light source used to enclose the detection area can be called the outer circle first light source, and the second light source located in the detection area can be called the inner circle light source.

[0006] In summary, at least one first photoelectric converter is arranged between two adjacent first light sources, and at least three first light sources and at least three first photoelectric converters form a detection area. When the detection device contacts the user's skin, the detection area determines the area range in which the detection device can detect the user's skin. In addition, at least two second light sources are arranged in the detection area, and the detection device has at least two distribution areas, in which the first light source, the second light source and the first photoelectric converter are distributed. In this case, a light path can be formed between a first light source and a first photoelectric converter, so that the first light source and the first photoelectric converter in the light path can constitute a PPG module. Similarly, a light path can also be formed between a second light source and a first photoelectric converter, so that the second light source and the first photoelectric converter in the light path can constitute a PPG module. The PPG module can detect the user's pulse data. In this way, by setting the distribution area, the number of light paths in the detection area and the number of PPG modules corresponding to each light path can be increased, so that when the user's skin contacts the detection area, more PPG modules can be obtained to detect the user's pulse data, thereby reducing the problem that the detection data of the local area in the detection area is disturbed, resulting in a decrease in the accuracy of the detection data. On this basis, the distance between the light source and the photoelectric converter can determine the effective depth of the light emitted by the light source to reach the skin (at this effective depth, the proportion of the PPG signal is high). Therefore, within the same distribution area, there is a first distance H1 between the first light source and at least one first photoelectric converter. There is a second distance H2 between the first light source and at least one first photoelectric converter outside the distribution area. Within the same distribution area, there is a third distance H3 between the second light source and at least one first photoelectric converter outside the distribution area. In the case where there is a fourth distance H4 between the second light source and at least one first photoelectric converter outside the distribution area, the first light source can have a first distance H1 and a second distance H2 respectively with at least two of all the first photoelectric converters, and the second light source can have a third distance H3 and a fourth distance H4 respectively with at least two of all the first photoelectric converters. Any two of the above four distances are different, so the detection device can have optical paths of at least four distances. The PPG module corresponding to each optical path can obtain PPG data of a skin depth, so that the detection device can obtain PPG data of at least four depths. In this way, the electronic device can, based on the detection results of the detection device, not only compare and analyze the PPG data obtained from different light paths in the detection area, but also compare and analyze the PPG data with different PIs, so that the final output PPG data has higher accuracy.

[0007] In an optional embodiment, 0mm10mm, the light path formed between the first light source and at least one first photoelectric converter outside the distribution area is an ultra-long-range light path (above 10mm). Alternatively, 0mm<H3<4mm, 4mm≤H1<7mm; 7mm≤H4≤10mm; H2>10mm. The setting method and technical effects of the above distances are the same as described above and will not be repeated here.<h1>

[0008] In an optional embodiment, two first light sources, a second light source located between the two first light sources, and at least one first photoelectric converter are distributed in the distribution area. In this way, in the same distribution area, not only can light paths be formed between the two adjacent first light sources and the first photoelectric converter respectively, but also between the two first light sources, the second light source can form a light path with the first photoelectric converter, thereby increasing the number of light paths between the two adjacent first light sources, so that the area covered by the light paths in the entire detection area is larger, and the detection device obtains more PPGs from different light paths, which can reduce the influence of interference caused by the large proportion of DC signals in the local area on the detection results, which is conducive to improving the detection accuracy.

[0009] In an optional embodiment, the detection device includes three first light sources and six first photoelectric converters, two first photoelectric converters are arranged between two adjacent first light sources, and two first photoelectric converters are distributed in the distribution area. The technical effects of the first light source and the first photoelectric converter are the same as those described above and will not be repeated here.

[0010] In an optional embodiment, in the same distribution area, the first light source and the two first photoelectric converters have a first distance H1 and a fifth distance H5, respectively, and the first distance H1 and the fifth distance H5. For example, H1<H5, 4mm≤H5<7mm, or 7mm≤H5≤10mm. In the same distribution area, the light path formed between the first light source and one of the first photoelectric converters is a short-range light path, and the light path formed between the first light source and the other first photoelectric converter is the above-mentioned medium-range light path. In the same distribution area, the second light source and the two first photoelectric converters have a third distance H3 and a sixth distance H6, respectively. For example, 4mm≤H6<7mm, and in the same distribution area, the light path formed between the second light source and any one of the first photoelectric converters is the above-mentioned medium-range light path. In this way, the detection device can obtain PPG data of six depths, and the technical effects of PPG data of multiple depths are the same as described above, which will not be repeated here.

[0011] In an optional embodiment, the first distance H1 in different distribution areas is the same, the second distance H2 in different distribution areas is the same, the third distance H3 in different distribution areas is the same, and the fourth distance H4 in different distribution areas is the same. In this way, the distribution of the first light source, the second light source, and the first photoelectric converter in the detection device can be symmetrical to improve the appearance quality of the electronic device.

[0012] In an optional embodiment, the detection device includes three first light sources and three first photoelectric converters, a first photoelectric converter is arranged between two adjacent first light sources, and a first photoelectric converter is distributed in the distribution area. The arrangement of the first light sources and the first photoelectric converters is the same as described above and will not be repeated here.

[0013] In an optional embodiment, the detection device has three distribution areas, and the detection device includes three second light sources, one second light source is located in one distribution area, and two adjacent distribution areas share the same first light source. The technical effects of the second light source, the first light source and the distribution area are the same as described above and will not be repeated here.

[0014] In an optional embodiment, the detection device has two distribution areas, and the detection device includes two second light sources, one second light source is located in one distribution area, and two adjacent distribution areas share the same first light source. The technical effects of the second light source, the first light source and the distribution area are the same as described above and will not be repeated here.

[0015] In an optional embodiment, the detection device further includes three third light sources, and one third light source is disposed between two adjacent first photoelectric converters. In this way, each third light source can form two light paths between two first photoelectric converters adjacent to the third light source, thereby increasing the number of light paths between two adjacent first photoelectric converters.

[0016] In an optional embodiment, the detection device includes four first light sources, four first photoelectric converters, and two second light sources, a first photoelectric converter is arranged between two adjacent first light sources, and a first photoelectric converter is distributed in the distribution area. The detection device has two distribution areas, and a second light source is located in one distribution area. The technical effects of the above-mentioned first light sources, first photoelectric converters, and distribution areas are the same as described above and will not be repeated here.

[0017] In an optional embodiment, the detection device includes four first light sources and four first photoelectric converters, and a first photoelectric converter is arranged between two adjacent first light sources. The detection device also includes four second photoelectric converters, and a second photoelectric converter is arranged between two adjacent first photoelectric converters. Two second photoelectric converters and one first photoelectric converter are distributed in the distribution area. In addition, the detection device has two distribution areas, and the detection device includes two second light sources, and one second light source is located in one distribution area. In this way, in the same distribution area, any one of the first light source and the second light source can form a light path not only with the first photoelectric converter, but also with the second photoelectric converter, thereby achieving the purpose of increasing the number of light paths. In addition, the setting method of the distance between the above-mentioned light source and each photoelectric converter can be obtained by the same logic, and will not be repeated here one by one.

[0018] In an optional embodiment, the detection device further includes four second photoelectric converters, the second photoelectric converters are arranged in the detection area, the detection device includes four first light sources and four first photoelectric converters, and a first photoelectric converter is arranged between two adjacent first light sources. Two first photoelectric converters, a second photoelectric converter located between the two first photoelectric converters, a second light source and a first light source are distributed in the distribution area, and the second photoelectric converter is located between the first light source and the second light source. The detection device has two distribution areas, and a second light source is located in one distribution area. The setting method of the distance between the above-mentioned light sources and each photoelectric converter can be obtained by the same logic, and will not be repeated here one by one.

[0019] In an optional embodiment, any one of the first light source and the second light source includes a first light emitting device and a second light emitting device, wherein the first light emitting device emits red light and the second light emitting device emits infrared light. Red light is mainly absorbed by deoxyhemoglobin in the blood, while infrared light is mainly absorbed by oxyhemoglobin in the blood. Therefore, the processor in the electronic device can use the absorption difference of red light and infrared light detected by the detection device to calculate the blood oxygen saturation by measuring the ratio of deoxyhemoglobin and oxyhemoglobin in the blood, thereby obtaining blood oxygen data.

[0020] In an optional embodiment, any one of the first light source and the second light source further includes a third light emitting device, which emits green light. Since human blood has a stronger absorption rate for green light, when the first light emitting device emits green light, the heart rate data detected by the detection device can be more accurate.

[0021] In an optional embodiment, the detection device further includes a light-transmitting cover plate, an optical film layer, an ink layer and a light-shielding member. The light-transmitting cover plate is covered on the first light source, the first photoelectric converter and the second light source. The light-transmitting cover plate can be made of a light-transmitting material with a light transmittance of more than 80%, such as glass, transparent resin or sapphire. The optical film layer is arranged on the side of the light-transmitting cover plate facing the first light source. The optical film layer can transmit the light emitted from the light source and the light reflected or scattered by the skin, and can also block the components covered by the light-transmitting cover plate in the electronic device to prevent the user from clearly seeing the internal structure of the detection device. The ink layer is arranged between the optical film layer and the light-transmitting cover plate, and the ink layer is provided with a first light-transmitting hole, a second light-transmitting hole and a third light-transmitting hole. The first light-transmitting hole exposes the light-emitting surface of the first light source, the second light-transmitting hole exposes the light-emitting surface of the second light source, and the third light-transmitting hole exposes the light-receiving surface of the first photoelectric converter. The ink layer can shield the remaining components of the detection device except the first light source, the second light source and the first photoelectric converter, and expose the first light source, the second light source and the first photoelectric converter through the first light-transmitting hole, the second light-transmitting hole and the third light-transmitting hole, respectively, so as to form the above-mentioned light path. The light-shielding member is arranged on the side of the optical film layer away from the light-transmitting cover plate, and the light-shielding member is located between any two of the first light source, the second light source and the first photoelectric converter. The light-shielding member can prevent the first light source and the second light source from cross-lighting, or prevent the light emitted by the first light source (or the second light source) from being directly received by the first photoelectric converter without being absorbed and scattered by the skin.

[0022] In one aspect of the present application, an electronic device is provided, the electronic device comprising a circuit board and any one of the detection devices described above, the detection device being arranged on the circuit board. The above electronic device has the same technical effect as the detection device provided in the above embodiment, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0024] Figure 1B for Figure 1A Schematic diagram of the explosion structure of the electronic equipment;

[0025] Figure 2A for Figure 1B A schematic diagram of the location of the detection device in an electronic device;

[0026] Figure 2B for Figure 1B A schematic diagram of the location of the detection device in another electronic device;

[0027] Figure 2C for Figure 1B A schematic diagram of the location of the detection device in another electronic device;

[0028] Figure 3 A schematic diagram of wearing an electronic device provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the structure of the detection device provided in this embodiment;

[0030] Figure 5A A detection schematic diagram of a blood oximeter provided for related technologies;

[0031] Figure 5B for Figure 5A Schematic diagram of the detection principle of the oximeter;

[0032] Figure 6 A schematic diagram of a cross-sectional structure of human skin provided in this embodiment;

[0033] Figure 7 A schematic diagram of the principle of generating a PPG wave is provided for an embodiment of the present application;

[0034] Fig. 8A A schematic diagram of PPG waves obtained from different parts of the human body provided in an embodiment of the present application;

[0035] Figure 8B A schematic diagram of the detection principle of a detection device provided in an embodiment of the present application;

[0036] Fig.9A A schematic diagram of the structure of a detection device provided in an embodiment of the present application;

[0037] Fig. 9B for Fig.9A A schematic diagram of dividing a distribution area of ​​the detection device shown;

[0038] Fig. 9C for Fig.9A Another schematic diagram of the division of the distribution area of ​​the detection device shown;

[0039] Fig.10 A schematic diagram of the structure of another detection device provided in an embodiment of the present application;

[0040] Fig.11A for Fig.9A A schematic diagram of a light path of the detection device shown;

[0041] Fig. 11B A schematic diagram of a light path of a detection device provided in an embodiment of the present application;

[0042] Fig. 11C A schematic diagram of another optical path of a detection device provided in an embodiment of the present application;

[0043] Fig.12 A schematic diagram of the detection principle of another detection device provided in an embodiment of the present application;

[0044] Fig.13 for Fig.9A Schematic diagram of various optical paths at different distances of the detection device shown;

[0045] Fig.14 A schematic diagram of a display state of an electronic device provided in an embodiment of the present application;

[0046] Fig.15 for Fig.9A A schematic structural diagram of the first light source;

[0047] Fig.16 A schematic diagram of the structure of another detection device provided in an embodiment of the present application;

[0048] Fig.17A for Fig.16 A schematic diagram of dividing a distribution area of ​​the detection device shown;

[0049] Fig. 17B for Fig.16 A schematic diagram of a light path of the detection device shown;

[0050] Fig. 17C for Fig.16 A schematic diagram of a plurality of light paths at different distances of a detection device shown;

[0051] Fig.17D for Fig.16 Another schematic diagram of the optical paths of the detection device at different distances shown;

[0052] Fig.18 A schematic diagram of signal proportions at different skin depths provided in an embodiment of the present application;

[0053] Fig.19 A schematic diagram of the structure of another detection device provided in an embodiment of the present application;

[0054] Fig. 20 A schematic diagram of the structure of another detection device provided in an embodiment of the present application;

[0055] Fig.21 for Fig. 20 A schematic diagram of a plurality of light paths at different distances of a detection device shown;

[0056] Fig. 22 A schematic diagram of the structure of another detection device provided in an embodiment of the present application;

[0057] Fig.23 A schematic diagram of the structure of another detection device provided in an embodiment of the present application.

[0058] Reference numerals:

[0059] 01-electronic device; 10-display screen; 11-middle frame; 12-back shell; 13-circuit board; 20-detection device; 100-skin; 02-oximeter; 101-stratum corneum; 102-epidermis; 103-dermis; 104-subcutaneous tissue; 1021-capillaries; 1031-arterioles; 1041-aorta; 201-first light source; 202-second light source; 211-first photoelectric converter; 200-detection area; 300-distribution area; 301-optical film layer; 302-transparent cover plate; 303-shading member; 304-ink layer; 3041-first light transmission hole; 3042-second light transmission hole; 3043-third light transmission hole; 203-third light source; 221-second photoelectric converter. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0061] In the following, the terms "first", "second", etc. are used only for convenience of description and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0062] In this application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integrated one; or, "connection" can be a direct connection or an indirect connection through an intermediate medium.

[0063] In addition, unless otherwise clearly specified and limited, the term "electrical connection" should be understood in a broad sense. For example, "electrical connection" can be a direct electrical connection, for example, physical contact and electrical conduction between two components. It can also be understood as the electrical connection between different components in the circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals to transmit electrical signals; or, "electrical connection" can be an indirect electrical connection between two components through an intermediate medium; or, "electrical connection" can be an electrical connection between two components in an air / non-contact manner, for example, two components are electrically connected by capacitive coupling to transmit electrical signals.

[0064] In the drawings of the embodiments of the present application, components are represented by guide lines with arrows; parts are represented by guide lines only; and hollow structures such as openings and holes are represented by guide lines with wavy lines at the ends.

[0065] An embodiment of the present application provides an electronic device, which can be applied to various communication systems or communication protocols, such as: Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, global system of mobile communication (GSM) communication technology, wireless fidelity (WiFi) communication technology, wideband code division multiple access wireless (WCDMA) communication technology, long term evolution (LTE), 5G communication technology and other future communication technologies.

[0066] The electronic device in the embodiment of the present application may be a smart wearable device, for example, a human health detection wearable device that can detect the user's health parameters (for example, heart rate, blood oxygen, blood pressure, sleep, etc.), and for example, the above-mentioned smart wearable device may be a smart watch, a smart bracelet, smart glasses, a smart helmet, and a smart headset. Alternatively, the above-mentioned electronic device may also be a mobile phone, a tablet computer (pad), a laptop computer, a smart home, a virtual reality (VR) electronic device, an augmented reality (AR) electronic device, etc. Alternatively, the electronic device may also be a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, an electronic device in a 5G network, or an electronic device in a future-evolved public land mobile communication network (PLMN), etc., and the embodiment of the present application is not limited to this.

[0067] For the convenience of explanation, the following is Figure 1A The electronic device 01 shown is a smart watch capable of performing health detection. For example, the electronic device 01 may include a display screen 10, a middle frame 11, and a Figure 1B The rear cover 12 is shown. Figure 1B As shown, the display screen 10 can be arranged in the middle frame 11, and the display surface of the display screen 10 is located on the side away from the rear shell 12, and the middle frame 11 can be arranged around the display screen 10. The above-mentioned display screen 10 can be a liquid crystal display (liquid crystal display, LCD), or an organic light emitting diode (organic light emitting diode, OLED) display screen, or a micro (micro or mini) light emitting diode (light emitting diode, LED) display screen. The present application does not limit the shape of the display screen 10. For example, the display surface of the display screen 10 can be circular or rectangular. The contour shape of the above-mentioned middle frame 11 and the rear shell 12 can match the contour shape of the display screen 10. For the convenience of explanation, the following description is based on the example that the contour shape of the display screen 10, the middle frame 11 and the rear shell 12 is circular.

[0068] On this basis, the electronic device 01 may further include a circuit board 13 (such as Figure 1BIn some embodiments of the present application, components such as circuit boards, batteries, processors, sensors, microphones, and speakers may be disposed between the display screen 10 and the rear housing 12. The middle frame 11 may support the entire electronic device 01.

[0069] For example, the processor may include one or more processing units, for example, the processor may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0070] In addition, in order to detect health parameters, such as heart rate and blood oxygen data, the electronic device 01 may also include: Figure 1B The detection device 20 shown. The detection device 20 can be located in the accommodation space surrounded by the display screen 10, the middle frame 11 and the rear shell 12. The detection device 20 can be arranged on the circuit board 13 and electrically connected to the circuit board 13. Based on this, as Figure 2A (along Figure 1A As shown in the top view obtained by the A direction in FIG, the rear shell 12 can expose a portion of the detection device 20. Figure 2A The electronic device 01 is a smart watch. Figure 2B (along Figure 1A The bracelet shown in the top view obtained by A in FIG. Figure 2C (along Figure 1A When the mobile phone is shown in the top view obtained by the A direction in the figure, the back cover 12 of the electronic device 01 can also expose a part of the detection device 20.

[0071] in, Figure 2A , Figure 2B as well as Figure 2CThis is only an example of the rear shell 12 exposing a portion of the detection device 20, and does not constitute a limitation on the appearance design of the rear shell 12 and the structure of the detection device 20. In other embodiments of the present application, the electronic device 01 may also be a headset or a head-mounted device. When the detection device 20 performs a health check on the user, the rear shell 12 of the electronic device 01 may be in contact with the user's skin. For the convenience of explanation, the following description is based on the electronic device 01. Figure 2A The smart watch shown is used as an example for illustration.

[0072] Based on this, in the case where the electronic device 01 is a smart watch, Figure 3 As shown, the user can wear the electronic device 01 on the left hand (or right hand), and the rear shell 12 (such as Figure 2A As shown in FIG. 1 , the detection device 20 may be in contact with the user's wrist, so that the detection device 20 can obtain the user's blood oxygen and heart rate data. For example, the detection device 20 may include: Figure 4 At least one photo plethysmograph (PPG) module is shown.

[0073] The specific working principle of the PPG module may be that the human body's blood circulation is driven by the contraction and relaxation of the beating heart. When the heart contracts, blood flows around the body, the part to be tested becomes congested, and the blood volume increases. When the heart relaxes, the part of the blood to be tested flows back to the heart, and the blood volume decreases. This will generate a periodic signal, which can also be called an alternating current (AC) signal. The AC signal may include a systolic phase peak and a diastolic phase peak. The heart rate (HR) can be determined by the above AC signal. In addition, the blood oxygen content in the blood is related to the hemoglobin content.

[0074] Based on this, Figure 4 The PPG module shown may include a light source, such as an LED and a photodetector (PD). The LED and the PD are arranged on the same side of the user's skin 100. The PPG module is a reflective PPG module. The human skin 100 absorbs and scatters visible light and infrared light. Figure 4After the light emitted by the LED is irradiated to the skin 100, the blood flow in the skin 100 (for example, changes in blood flow caused by heart beats) and the hemoglobin content in the blood will affect the amount of light absorption, and thus affect the light scattering by the skin 100. By acquiring the light scattered by the skin 100 through PD, the law of the change of light intensity related to the blood volume of the human body over time can be detected, that is, the photoplethysmogram. The photoplethysmogram can reflect the characteristics of blood flow and the hemoglobin content, and then the heart rate, blood oxygen and other data can be obtained.

[0075] The above is an example in which the light source in the PPG module is an LED. In other embodiments of the present application, the light source may also be an OLED, or a self-luminous device such as a quantum dot light emitting diode (QLED). The present application does not limit the structure of the light source.

[0076] In related technologies, such as Figure 5A As shown, the user can clip a finger into the finger clip type oximeter 02, so that the fingertip of the user can be detected by the finger clip type oximeter 02 to obtain blood oxygen and heart rate data. Figure 5B As shown, the LED and PD in the PPG module can be respectively arranged on both sides of the user's skin 100, and the PPG module is a transmissive PPG module. However, the detection method using the finger clip oximeter 02 will make the user's fingertips unable to move normally and have a sense of squeezing, and it is difficult to achieve real-time detection. Therefore, the electronic device 01 provided in the embodiment of the present application adopts the following method: Figure 4 The reflective PPG module shown is illustrated by taking the detection device 20 in the electronic device 01 testing the user's wrist as an example.

[0077] Based on this, Figure 6 As shown, the human skin 100 may include a stratum corneum 101, an epidermis 102, a dermis 103 and a subcutaneous tissue 104 from the outside to the inside. Among them, the epidermis 102 includes a granular layer, a spinous layer and a basal layer (not shown in the figure), etc. The dermis 103 may include a papillary dermis, an upper vascular plexus, a reticular dermis and a lower vascular plexus (not shown in the figure), etc. Capillaries 1021, arterioles (not shown in the figure) and most of the small arteries 1031 are distributed in the dermis 103. The subcutaneous tissue 104 may include a fat layer, a fascia (not shown in the figure), etc., and a small part of small arteries 1031 and large arteries 1041 are distributed in the subcutaneous tissue 104. Among them, Figure 6It is only to indicate that capillaries 1021 and arterioles 1031 are distributed in the dermis 102 , and a small part of arterioles 1031 and aorta 1041 are distributed in the subcutaneous tissue 104 , and does not constitute a limitation on the relative positional relationship among capillaries 1021 , arterioles 1031 and aorta 1041 .

[0078] In this case, among the data obtained by the PPG module, such as Figure 7 As shown, the part that can generate the above AC signal is the aorta 1041 (such as Figure 6 When the pulsatile component of artery blood ① is at the peak position a1, the aorta 1041 (as shown in FIG. Figure 6 As shown in Figure 1, the amount of blood in the artery is the largest, so the absorption rate of the light emitted by the LED in the PPG module is the highest. At this time, the light signal received by the PD in the PPG is the least, corresponding to the trough position a2 of the AC signal. In addition, when the pulsating component ① of the arterial blood is at the trough position b1, the aorta 1041 (as shown in Figure 1) Figure 6 As shown in the figure, the amount of blood in the arterial blood is the smallest, so the absorption rate of the light emitted by the LED in the PPG module is the smallest. At this time, the light signal received by the PD in the PPG is the largest, corresponding to the peak position b2 of the AC signal. The waveform of the AC signal changes periodically with time.

[0079] also, Figure 7 The non-pulsatile component of artery blood②, venous blood③ and other tissues④ (such as human bones, muscles, pigments and hair, etc.) have basically unchanged absorption rates for the light emitted by the LED in the PPG module. Therefore, the light received by the PD in the PPG from the above three parts ( Figure 7 The optical signals of ②, ③, and ④ in the above equation remain basically unchanged. Therefore, the PPG detection result includes not only the AC signal, but also the above three parts ( Figure 7 The direct current (DC) signal generated by ②, ③, and ④ in FIG. The magnitude of the DC signal does not change with time.

[0080] Based on this, Fig. 8AAs shown, the blood vessel distribution density of the human wrist is less than that of the fingertips, and the human structure of the wrist is more complex than that of the fingertips. For example, the wrist includes not only the skin, but also the bones, muscles, pigments, and hairs mentioned above that can generate DC signals. Therefore, the amplitude (or signal strength) of the AC signal component AC1 detected by the PPG module on the wrist will be smaller than the amplitude (or signal strength) of the AC signal component AC2 detected by the PPG module on the fingertips.

[0081] The detection accuracy of the detection device 20 with the above-mentioned PPG module is affected by the perfusion index (PI). The larger the PI is, the higher the detection accuracy of the detection device 20 is, and vice versa. The PI can be the ratio of the AC signal to the DC signal. Fig. 8A It can be seen that the PI value detected by the detection device 20 on the wrist part is smaller than the PI value detected by the detection device 20 on the fingertip part. Figure 8B As shown in FIG. 1 , the part of the user's skin 100 used to generate a DC signal will act as an interference source, interfering with the signal detected by the PPG module, thereby reducing the signal noise ratio (SNR) of the detection device 20. In addition, the detection accuracy of the detection device 20 will also be affected by other noises, such as noise caused by electronic circuit interference, device state deviation, etc. Among them, the light emitted by the LED will form a Figure 8B The “banana-shaped” optical path shown in the figure, through which light is received by the PD, enables the PPG module to detect the user’s blood oxygen, heart rate and other data.

[0082] Based on this, in order to improve the detection accuracy and signal-to-noise ratio of the detection device 20, the detection device 20 provided in the embodiment of the present application is as follows: Fig.9A As shown, it may include at least three first light sources 201, at least three first photoelectric converters 211 and at least two second light sources 202. Fig.9A The description is made by taking an example that the detection device includes three first light sources 201 , three first photoelectric converters 211 and three second light sources 202 .

[0083] Based on this, continue as Fig.9AAs shown, at least one first photoelectric converter 211 is arranged between two adjacent first light sources 201. All first light sources 201 (i.e., the at least three first light sources 201) and all first photoelectric converters 211 (i.e., at least three first photoelectric converters 211) of the detection device 20 can enclose a detection area 200. All second light sources 202 (i.e., at least two second light sources 202) in the detection device 20 can be arranged in the detection area 200. Among them, the first light sources 201 used to enclose the detection area 200 can be called outer circle first light sources, and the second light sources 202 located in the detection area 200 can be called inner circle light sources.

[0084] The detection area 200 means that when the user brings the electronic device 01 into contact with the skin, for example, when the user wears the electronic device 01 on the wrist, when the back shell 12 of the electronic device 01 contacts the skin of the user's wrist, the range of the skin covered by the detection area 200 can be the area range of the user's skin that the detection device 20 in the electronic device 01 can detect.

[0085] For the convenience of explanation, the first light source 201 is represented by an unfilled circle, the second light source 202 is represented by a circle filled with diagonal lines, and the first photoelectric converter 211 is represented by an unfilled square. The shapes of the components in the drawings do not limit the actual appearance of the components.

[0086] On this basis, if Fig. 9B As shown, the detection device 20 may have a distribution area 300 ( Fig. 9B The distribution area 300 is a region formed by the intersection of the dotted line and the edge of the detection device 20. The first light source 201, the second light source 202 and the first photoelectric converter 211 are distributed in the distribution area 300. For example, Fig. 9B Two first light sources 201 , one second light source 202 , and one first photoelectric converter 211 may be distributed in the distribution area 300 shown.

[0087] Fig. 9B The following is an example of the detection device 20 having three second light sources 202. Fig. 9CAs shown, the detection device 20 may include three distribution areas, namely, a first distribution area 300a, a first distribution area 300b, and a first distribution area 300c. Among them, a second light source 202 is respectively provided in the first distribution area 300a, the first distribution area 300b, and the first distribution area 300c. The detection device 20 may include three first light sources (for example, a first light source 201a, a first light source 201b, and a first light source 201c), three second light sources (for example, a second light source 202a, a second light source 202b, and a second light source 202c) and three first photoelectric converters (for example, a first photoelectric converter 211a, a first photoelectric converter 211b, and a first photoelectric converter 211c).

[0088] In addition, any one of the first distribution area 300a, the first distribution area 300b and the first distribution area 300c has two first light sources and one first photoelectric converter. Two adjacent distribution areas may share the same first light source 201. For example, the first distribution area 300a and the first distribution area 300b share one first light source 201a, the first distribution area 300b and the first distribution area 300c share one first light source 201b, and the first distribution area 300c and the first distribution area 300a share one first light source 201c.

[0089] In this case, within the same distribution area (e.g., distribution area 300a), when a first photoelectric converter 211a is provided between two adjacent first light sources, such as the first light source 201a and the first light source 201c, by providing the second light source 202a between the above-mentioned two adjacent first light sources, the above-mentioned second light source 202a can be distributed near the location of the first photoelectric converter 211a. In this way, within the same distribution area, not only can the first light source 201a and the first light source 201c form a light path with the first photoelectric converter 211a respectively, but also between the above-mentioned first light source 201a and the first light source 201c, the second light source 202a can form a light path with the first photoelectric converter 211a, thereby increasing the number of light paths between two adjacent first light sources (e.g., the first light source 201a and the first light source 201c), so that the entire detection area 200 (e.g., Fig.9A As shown in the figure, the area covered by the optical path is larger, and the detection device 20 obtains more PPGs from different optical paths, which can reduce the influence of interference caused by a large proportion of DC signals in local areas on the detection results, which is beneficial to improving the detection accuracy.

[0090] The above is based on Fig. 9C The detection device 20 shown in the figure has three second light sources 202 as an example. In other embodiments of the present application, Fig.10As shown, the detection device 20 may have two second light sources 202. In this case, the detection device 20 may have two distribution areas, namely, the first distribution area 300a and the first distribution area 300b, and the first distribution area 300a and the first distribution area 300b are respectively provided with a second light source 202. In addition, the two adjacent distribution areas (for example, the first distribution area 300a and the second distribution area 300b) described above share the same first light source 201.

[0091] The above is an example of setting the number of distribution areas 300 according to the number of second light sources 202, and does not constitute a limitation on the number of second light sources 202 and distribution areas 300. As long as the distribution area 300 has a first light source 201, a second light source 202 and a first photoelectric converter 211. Fig. 9C The three second light sources shown are used as examples for illustration.

[0092] In this case, if Fig.11A As shown, in the detection device 20, a light path ( Fig.11A denoted by solid arrows). For example, Fig. 11B As shown, the light emitted by the first light source 201 is incident on the skin 100. After being absorbed and scattered by the skin 100, part of the scattered light can be incident on the first photoelectric converter 211, thereby forming a light path ①. In this way, the first light source 201 and the first photoelectric converter 211 forming the above light path ① can constitute a PPG module, and the above PPG module can detect the user's pulse data.

[0093] Among them, Fig. 11B As shown, the detection device 20 may further include an optical film layer 301, a transparent cover plate 302, a light shielding member 303, and an ink layer 304. The transparent cover plate 302 may be used as Figure 1B The transparent cover plate 302 can cover at least a portion of the rear shell 12 in the first light source 201, the first photoelectric converter 211 and the second light source 202. The transparent cover plate 302 can be made of a transparent material with a light transmittance of more than 80%, such as glass, transparent resin or sapphire. In addition, the optical film layer 301 can be arranged on the side of the transparent cover plate 302 facing the first light source 201. The optical film layer 301 can be a Fresnel film layer, which can transmit the light emitted from the light source and the light reflected or scattered by the skin, and can also block the components covered by the transparent cover plate 302 in the electronic device 01, so as to prevent the user from clearly seeing the internal structure of the detection device 20.

[0094] In addition, continue as Fig. 11B As shown, the ink layer 304 can be disposed between the optical film layer 301 and the transparent cover plate 302, and the ink layer 304 is provided with a first light-transmitting hole 3041, a second light-transmitting hole 3042 and a third light-transmitting hole 3043. The first light-transmitting hole 3041 can expose the light-emitting surface of the first light source 201, the second light-transmitting hole 3042 can expose the light-emitting surface of the second light source 202, and the third light-transmitting hole 3043 can expose the light-receiving surface of the first photoelectric converter 211. In this way, the ink layer 304 can shield the remaining components of the detection device 20 except the first light source 201, the second light source 202 and the first photoelectric converter 211, and the first light source 201, the second light source 202 and the first photoelectric converter 211 are exposed through the first light-transmitting hole 3041, the second light-transmitting hole 3042 and the third light-transmitting hole 3043, respectively, so as to form the above-mentioned light path ① and light path ②.

[0095] On this basis, in order to avoid light crosstalk between the first light source 201 and the second light source 202, or to avoid the light emitted by the first light source 201 (or the second light source 202) from being directly received by the first photoelectric converter 211 without being absorbed and scattered by the skin 100, the detection device 20 may include the above-mentioned shading member 303, which may be arranged on the side of the optical film layer 301 away from the transparent cover plate 302, and the shading member 303 may be located between any two of the first light source 201, the second light source 202 and the first photoelectric converter 211, so as to play a role in light isolation. Among them, a transparent adhesive layer (indicated by a diagonal line filling pattern in the figure) may be used to bond the shading member 303 and the optical film layer 301, and the optical film layer 301 and the ink layer 304.

[0096] Similarly, continue as Fig.11A As shown, a light path can also be formed between a second light source 202 and a first photoelectric converter 211 ( Fig.11A Indicated by dashed arrows), for example, Fig. 11B As shown, the light emitted by the second light source 202 is incident on the skin 100. After being absorbed and scattered by the skin 100, part of the scattered light can be incident on the first photoelectric converter 211, thereby forming a light path ②. In this way, the second light source 202 and the first photoelectric converter 211 in the above light path ② can constitute a PPG module.

[0097] Based on this, since the distribution area 300 (such as Fig. 9B As shown in FIG. 2 ), a first light source 201, a second light source 202 and a first photoelectric converter 211 are provided, and the detection device 20 may have at least two distribution areas, so that the detection area 200 (as shown in FIG. 20 ) of the detection device 20 may be increased. Fig.9A), the number of light paths and PPG modules corresponding to each light path enables the detection area 200 covering the user's skin to obtain the detection results of the user's pulse data by different PPG modules. In this case, when part of the detection area 200 is affected by Figure 8B When affected by the interference source shown or the noise generated by the electronic device, the processor of the electronic device 01 can compare and analyze the PPG data (including blood oxygen and heart rate) obtained by different optical paths in the detection area 200 according to the detection results of the detection device 20, so as to improve the accuracy of the detection data and the signal-to-noise ratio.

[0098] In addition, when the distance between LED and PD is different, the effective depth of the light emitted by LED to reach the skin (at the effective depth, the proportion of PPG signal in each layer of skin is higher) is different. For example, Fig. 11B As shown, the distance between the second light source 202 and the first photoelectric converter 211 is relatively close. Therefore, the depth at which the light in the optical path ① (from the first light source 201) reaches the skin 100 may be greater than the depth at which the light in the optical path ② (from the second light source 202) reaches the skin 100. Alternatively, for example, Fig. 11C As shown, the distances between the first light source 201 and the second light source 202 and the first photoelectric converter 211 are the same or approximately the same. Therefore, the depth at which the light in the optical path ① (from the first light source 201) reaches the skin 100 can be the same or approximately the same as the depth at which the light in the optical path ② (from the second light source 202) reaches the skin 100.

[0099] In this case, as can be seen from the above, the portion of the skin 100 used to generate the DC signal will act as Fig.12 The interference source shown in the figure interferes with the signal detected by the PPG module. Figure 7 The AC signal of the aorta 1041 is shown at Figure 6 In the subcutaneous tissue 104 shown, the depth of the subcutaneous tissue 104 is deeper than the epidermis 102 and the dermis 103. Therefore, the deeper the light from the light source reaches the skin, the greater the proportion of the AC signal in the obtained detection signal, the higher the PI of the detection result, and the higher the detection accuracy. Fig.12 Since the depth at which the light in optical path ① (from the first light source 201) reaches the skin 100 is greater than the depth at which the light in optical path ② (from the second light source 202) reaches the skin 100, the PI of the detection signal obtained by the first photoelectric converter 211 in the PPG module corresponding to optical path ① is greater than the PI of the detection signal obtained by the first photoelectric converter 211 in the PPG module corresponding to optical path ②.

[0100] As can be seen from the above, in the optical path, the depth of light reaching the skin is different, and the PI of the obtained detection result is different. Therefore, in order to enable the detection device 20 to obtain detection results with different PIs, so as to improve the accuracy and signal-to-noise ratio of the detection result of the detection device 20, as shown in FIG. Fig.13 As shown, in the same distribution area 300, there is a first distance H1 between the first light source 201 and at least one first photoelectric converter 211. For example, when there are two or more first photoelectric converters 211 in the distribution area 300, in the same distribution area 300, there may be a first distance H1 between the first light source 201 and one of the first photoelectric converters 211, and the distances between the first light source 201 and the remaining first photoelectric converters 211 may be the same as the first distance H1 or may be different.

[0101] In addition, continue as Fig.13 As shown, there is a second distance H2 between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300. For example, when there are two or more first photoelectric converters 211 outside the distribution area 300, there is a second distance H2 between the first light source 201 and one first photoelectric converter 211 outside the distribution area 300, and the distances between the first light source 201 and the remaining first photoelectric converters 211 outside the distribution area 300 may be the same as or different from the second distance H2.

[0102] For example, Fig.13 As shown, within the same distribution area 300, there is a first distance H1 between the first light source 201 and the first photoelectric converter 211. There is a second distance H2 between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300, wherein H1<H2. For example, 0mm10mm, at this time, the light path formed between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 is an ultra-long-range (more than 10mm) light path.<h1>

[0103] In addition, continue as Fig.13As shown, in the same distribution area 300, there is a third distance H3 between the second light source 202 and at least one first photoelectric converter 211. For example, when there are two or more first photoelectric converters 211 in the distribution area 300, in the same distribution area 300, there may be a third distance H3 between the second light source 202 and one of the first photoelectric converters 211, and the distance between the second light source 202 and the remaining first photoelectric converters 211 may be the same as or different from the third distance H3.

[0104] Furthermore, there is a fourth distance H4 between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300. For example, when there are two or more first photoelectric converters 211 outside the distribution area 300, there is a fourth distance H4 between the second light source 202 and one first photoelectric converter 211 outside the distribution area 300, and the distances between the second light source 202 and the remaining first photoelectric converters 211 outside the distribution area 300 may be the same as or different from the fourth distance H4. Among the first distance H1, the second distance H2, the third distance H3 and the fourth distance H4, any two distances are different.

[0105] For example, Fig.13 As shown, in the same distribution area 300, there is a third distance H3 between the second light source 202 and the first photoelectric converter 211. There is a fourth distance H4 between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300, wherein H3<H4<H2. For example, when 0mm

[0106] ​On this basis, in order to make the distribution of the first light source 201, the second light source 202 and the first photoelectric converter 211 in the detection device 20 symmetrical so as to improve the appearance quality of the electronic device 01, the first distance H1 in different distribution areas can be the same, the second distance H2 in different distribution areas can be the same, the third distance H3 in different distribution areas can be the same, and the fourth distance H4 in different distribution areas can be the same.

[0107] Based on this, the detection device 20 may have optical paths corresponding to at least four distances (first distance H1, second distance H2, third distance H3 and fourth distance H4). The PPG modules on the optical paths corresponding to different distances may obtain PPG data with different PIs. In this way, the processor of the electronic device 01 may compare and analyze PPG data with different PIs according to the detection results of the detection device 20, thereby achieving the purpose of improving the accuracy and signal-to-noise ratio of the detection data.

[0108] Among them, Fig.13 As shown, the same first photoelectric converter 211 can receive light from different first light sources 201 or different second light sources 202. In order to enable the processor of the electronic device 01 to distinguish the PPG data of different light paths, in the above detection device 20, the first light source 201 and the second light source 202, the different first light sources 201, and the different second light sources 202 can be driven in time-sharing manner, so that different light sources can be lit in time-sharing manner. This application does not limit the time-sharing driving method of different light sources.

[0109] As can be seen from the above, the processor of the electronic device 01 can not only compare and analyze the PPG data obtained by different light paths in the detection area 200, but also compare and analyze the PPG data with different PIs according to the detection results of the detection device 20, so as to obtain the final PPG data as the detection result for output. For example, when the electronic device 01 having the above detection device 20 has a display function, such as Fig.14 As shown, the electronic device 01 can display the above-mentioned PPG data, such as blood oxygen and heart rate, so that the user can obtain health test results in time.

[0110] In order to obtain the above blood oxygen data, in some embodiments of the present application, any one of the above first light source 201 and the second light source 202 may include Fig.15The first light emitting device 2001 and the second light emitting device 2002 shown in the figure can emit red light (red, RD) with a wavelength of 660-735nm, and the second light emitting device 2002 can emit infrared light (infrared, IR) with a wavelength of 805-940nm. Among them, red light is mainly absorbed by deoxyhemoglobin in the blood, and infrared light is mainly absorbed by oxyhemoglobin in the blood. Therefore, the processor in the above electronic device 01 can use the absorption difference of red light and infrared light detected by the detection device 20 to calculate the blood oxygen saturation by measuring the ratio of deoxyhemoglobin and oxyhemoglobin in the blood, thereby obtaining blood oxygen data.

[0111] In addition, it can be seen from the above that according to Figure 7 The trough a2 position (corresponding to the systolic peak) and the peak b2 position (corresponding to the diastolic peak) in the AC signal shown can determine the user's heart rate. The AC signal is related to the absorption and scattering of the light emitted by the light source of the detection device 20 by the human body. Since the human blood has a stronger absorption rate for green light, in order to make the heart rate data detected by the detection device 20 more accurate, Fig.15 As shown, after the light emitted by the first light emitting device 2001 or the second light emitting device 2002 of the detection device 20 is received by the PD, the heart rate data can be obtained. However, any one of the first light source 201 and the second light source 202 can be a third light emitting device 2003, which emits green light.

[0112] in, Fig.15 The first light source 201 includes a first light emitting device 2001, a second light emitting device 2002, and a third light emitting device 2003. The second light source 202 may also include the first light emitting device 2001, the second light emitting device 2002, and the third light emitting device 2003. Fig.15 This is merely an example of the arrangement positions of the first light emitting device 2001 , the second light emitting device 2002 , and the third light emitting device 2003 , and the present application does not limit the arrangement positions of the above light emitting devices.

[0113] In addition, the above is an example of the detection device 20 detecting the user's blood oxygen and heart rate. In other embodiments of the present application, the processor of the electronic device 01 can also obtain the user's blood pressure, sleep, hemoglobin concentration, pulse, blood oxygen saturation, respiratory rate, blood perfusion index, blood flow reactivity, methemoglobin, carboxyhemoglobin, bilirubin, oxygen content and other data based on the blood oxygen and heart rate data detected by the detection device 20.

[0114] The following is an example of the structure of the detection device 20, combining the number and location of the first light source 201, the second light source 202 and the first photoelectric converter 211 in the distribution area, and the number of light sources and photoelectric converters in the entire detection device 20. In other embodiments of the present application, such as Fig.16 As shown, the detection device 20 may include three first light sources 201 and six first photoelectric converters 211 , and two first photoelectric converters 211 are arranged between two adjacent first light sources 201 .

[0115] In addition, two first light sources 201 are distributed in the distribution area 300, as well as two first photoelectric converters 211 and one second light source 202 located between the two first light sources 201. Similarly, in this way, in the same distribution area, each first light source 201 can form two light paths with the two first photoelectric converters 211, and between the two first light sources 201, the second light source 202 can form two light paths with the first photoelectric converters 211, thereby increasing the number of light paths between two adjacent first light sources 201.

[0116] On this basis, if Fig.17A As shown, the detection device 20 may have three distribution areas, namely, distribution area 300a, distribution area 300b and distribution area 300c. A second light source is distributed in each distribution area, for example, the second light source 202a is distributed in the distribution area 300a, the second light source 202b is distributed in the distribution area 300b, and the second light source 202c is distributed in the distribution area 300c. In addition, in the detection device 20, two adjacent distribution areas share the same first light source, for example, the distribution area 300a and the distribution area 300b share the first light source 201a. The distribution area 300b and the distribution area 300c share the first light source 201c, and the distribution area 300c and the distribution area 300a share the first light source 201b.

[0117] In this case, if Fig. 17B As shown, in the detection device 20, a light path ( Fig. 17B The first light source 201 and the first photoelectric converter 211 forming the above-mentioned light path can constitute a PPG module. In addition, a light path ( Fig. 17B The second light source 202 and the first photoelectric converter 211 in the above-mentioned light path may constitute a PPG module.

[0118] In this way, when the plurality of first light sources 201 and the plurality of second light sources 202 are driven in a time-sharing manner, Fig. 17B As shown, each light source (first light source 201 or second light source 202) can form a light path (indicated by arrows) with a first photoelectric converter 211. Since the multiple light sources and the multiple first photoelectric converters 211 are distributed at different positions, the multiple light paths formed are located in the detection area 200 (such as Fig.9A The optical paths are intersected with each other as shown in the figure, thereby increasing the density of the optical paths, so that the area covered by the optical paths in the entire detection area 200 is larger, and the detection device 20 obtains more PPGs from different optical paths, which can reduce the influence of interference caused by a large proportion of DC signals in local areas on the detection results, and is beneficial to improving the detection accuracy.

[0119] As can be seen from the above, in the optical path, the depth of light reaching the skin is different, and the PI of the obtained detection result is different. Therefore, in order to enable the detection device 20 to obtain detection results with different PIs, so as to improve the accuracy and signal-to-noise ratio of the detection results of the detection device 20, for example, Fig. 17C As shown, within the same distribution area 300, the first light source 201 and the two first photoelectric converters 211 have a first distance H1 and a fifth distance H5, respectively, and the first distance H1 and the fifth distance H5 may be different. The first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 have a second distance H2. Among them, H1<H5<H2. In addition, within the same distribution area 300, the second light source 202 and the two first photoelectric converters 211 have a third distance H3 and a sixth distance H6, respectively. The second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 have a fourth distance H4. Among them, H3<H4, H6<H4.

[0120] In some embodiments of the present application, 0mm Fig. 17C As shown, in the same distribution area 300, the optical path formed between the first light source 201 and one of the first photoelectric converters 211 is the above-mentioned short-range optical path. For example, when H1=3.2mm, the above-mentioned short-range optical path, as shown in Table 1, can reach the skin depth including the papillary dermis layer in the dermis (signal proportion is 0.21%), the upper vascular plexus (signal proportion is 1.29%), the reticular dermis layer (signal proportion is 41.04%) and the lower vascular plexus (signal proportion is 24.29%), and the fat layer in the subcutaneous tissue (signal proportion is 33.16%).

[0121] ​From the above, it can be seen that after the light emitted by the light source in the PPG module is incident on tissue layers of different depths in the skin (including the stratum corneum, epidermis, papillary dermis, upper vascular plexus, reticular dermis, lower vascular plexus and fat layer), it will be absorbed and scattered by some of the tissue layers. Then, the PD in the PPG module can receive the light scattered from some tissue layers in the skin to generate the above detection signal. Among them, the signal proportion of a tissue layer in the skin (for example, the reticular dermis) refers to the proportion of the detection signal formed by the scattered light from this tissue layer (for example, the reticular dermis) received by the PD when the light emitted by the light source in the PPG module penetrates a tissue layer (for example, the reticular dermis), to the total detection signals received by the PD from various tissue layers of the skin. Therefore, the depth of the tissue layer (for example, the reticular dermis) corresponding to the above signal proportion is the depth of the light penetrating the skin.

[0122] Therefore, the larger the signal ratio, the deeper the light emitted by the light source in the PPG module penetrates the skin, that is, the effective depth. Based on this, it can be seen from the data in Table 1 that when H1=3.2mm, the PPG module corresponding to the first distance H1 has the highest signal ratio (41.04%) obtained in the reticular dermis layer. Therefore, the effective depth of the short-range light path with the first distance H1 reaching the human skin can be the reticular dermis layer.

[0123] In addition, 4mm≤H3<7mm, 4mm≤H6<7mm, 4mm≤H5<7mm, the third distance H3, the fifth distance H5 and the sixth distance H6 can be the same or different, as long as the third distance H3, the fifth distance H5 and the sixth distance H6 are within the range of 4mm~7mm. Fig. 17C As shown, in the same distribution area 300, the light path formed between the second light source 202 and any first photoelectric converter 211 is the above-mentioned medium-range light path. In addition, in the same distribution area 300, the light path formed between the first light source 201 and another first photoelectric converter 211 is the above-mentioned medium-range light path.

[0124] For example, when H3, H5 or H6 is 5.5 mm, as shown in Table 1, the skin depth that can be reached by the above-mentioned mid-range optical path includes the papillary dermis layer in the dermis (signal proportion is 0.58%), the upper vascular plexus (signal proportion is 1.16%), the reticular dermis layer (signal proportion is 23.58%) and the lower vascular plexus (signal proportion is 16.22%), and the fat layer in the subcutaneous tissue (signal proportion is 58.46%). Therefore, the PPG module corresponding to the third distance H3, the fifth distance H5 or the sixth distance H6 has the highest signal proportion (58.46%) obtained in the reticular dermis layer. Therefore, the mid-range optical path with the above-mentioned third distance H3, the fifth distance H5 or the sixth distance H6 can effectively reach the reticular dermis layer in depth to the human skin.

[0125] Similarly, 7mm≤H4≤10mm, such as Fig. 17C As shown, the optical path formed between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 is the above-mentioned long-range optical path. For example, when H4=7mm, as shown in Table 1, the skin depth that can be reached by the above-mentioned long-range optical path includes the upper vascular plexus in the dermis (signal proportion is 1.00%), the reticular dermis (signal proportion is 2.02%) and the lower vascular plexus (signal proportion is 8.54%), and the fat layer in the subcutaneous tissue (signal proportion is 88.44%). Therefore, the PPG module corresponding to the fourth distance H4 has the highest signal proportion (88.44%) obtained in the fat layer, so the long-range optical path with the above-mentioned fourth distance H4 can reach the effective depth of the human skin to the fat layer.

[0126] Similarly, H2>10mm, such as Fig. 17C As shown, the optical path formed between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 is the above-mentioned ultra-long-range optical path. For example, when H2=10.2mm, as shown in Table 1, the skin depth that can be reached by the above-mentioned ultra-long-range optical path includes the upper vascular plexus in the dermis (signal share is 0.46%), the reticular dermis (signal share is 3.62%) and the lower vascular plexus (signal share is 1.26%), and the fat layer in the subcutaneous tissue (signal share is 94.66%). Therefore, the PPG module corresponding to the second distance H2 has the highest signal share (94.66%) obtained in the fat layer. Therefore, the ultra-long-range optical path with the above-mentioned second distance H2 can reach the effective depth of the human skin to the fat layer.

[0127] Table 1

[0128]

[0129] On this basis, in order to make the distribution of the first light source 201, the second light source 202 and the first photoelectric converter 211 in the detection device 20 symmetrical so as to improve the appearance quality of the electronic device 01, as shown in FIG. Fig.17D As shown, the first distance H1 in different distribution areas (e.g., distribution area 300a and distribution area 300b) may be the same, the second distance H2 in different distribution areas (e.g., distribution area 300a and distribution area 300b) may be the same, the third distance H3 in different distribution areas (e.g., distribution area 300a and distribution area 300b) may be the same, the fourth distance H4 in different distribution areas (e.g., distribution area 300a and distribution area 300b) may be the same, the fifth distance H5 in different distribution areas may be the same, and the sixth distance H6 in different distribution areas may be the same.

[0130] The above is an example of the setting of the first distance H1, the second distance H2, the third distance H3, the fourth distance H4, the fifth distance H5 and the sixth distance H6 in the distribution area 300a and the distribution area 300b. In other embodiments of the present application, the setting of the above-mentioned distances in the distribution area 300a and the distribution area 300c, or the distribution area 300b and the distribution area 300c is the same as described above, and will not be repeated here.

[0131] In addition, by sorting out the data in Table 1, we can conclude that Fig.18 The bar graph shown. Fig.18 It can be seen that when the detection device 20 drives the above-mentioned first light source 201 and second light source 202 in a time-sharing manner, the detection signals obtained by the optical paths in various distance ranges have almost no proportion in the stratum corneum and epidermis, and have a small proportion in the papillary dermis and the upper vascular plexus, which is about 1.00%. In addition, the detection signals obtained by the long-range (7mm~10mm) optical path and the medium-range (4mm~7mm) optical path have a higher proportion in the lower vascular plexus and the reticular dermis. The detection signals obtained by the long-range (7mm~10mm) optical path and the ultra-long-range (10mm and above) optical path have a higher proportion in the fat layer.

[0132] Among them, the detection signal obtained by the ultra-long-range (more than 10 mm) optical path accounts for the highest proportion in the fat layer. As can be seen from the above, the subcutaneous tissue 104 where the fat layer is located has large arteries 1041 (such as Figure 6 As shown in FIG. 1 ), the pulsating component of the blood in the aorta 1041 can generate the AC signal, so that the signal obtained by the detection device 20 has a higher perfusion rate. For example, when the detection device 20 detects blood oxygen, the light emitting device in the light source of the detection device 20 includes a first light emitting device 2001 emitting RD light and a second light emitting device 2002 emitting IR light (as shown in FIG. 1 ). Fig.15 As shown). When using the ultra-long-range (10mm or more) optical path, the red light perfusion rate PI_RD obtained by the detection device 20 can reach 0.24%, and the infrared light perfusion rate PI_RD obtained by the detection device 20 can reach 0.36%. In addition, as shown in Table 2, when using the long-range (7mm-10mm) optical path, the medium-range (4mm-7mm) optical path, and the short-range (4mm or less) optical path, the red light perfusion rate PI_RD and the infrared light perfusion rate PI_RD obtained by the detection device 20 decrease in turn.

[0133] Based on this, when performing health checks on different users, due to different physical conditions of the human body, under the same detection conditions (such as detection temperature or distance of the optical path, etc.), the perfusion rate of the detection data of some users is low, and the above-mentioned users can be called low perfusion rate people (for example, the elderly, women, or people with thin bodies, etc.). In addition, the blood flow state of the human body is related to the ambient temperature. When the ambient temperature is high, the perfusion rate of the obtained detection data will also decrease. In order to solve the above-mentioned problem, when using the detection device 20 provided in the embodiment of the present application, the above-mentioned first light source 201 and the second light source 202 can be driven by time-sharing to detect the user using the above-mentioned ultra-long-range (more than 10mm) optical path, so that the light emitted by the light source can reach the fat layer more, thereby obtaining detection data with a higher perfusion rate.

[0134] Table 2

[0135]

[0136] Alternatively, in some other embodiments of the present application, 0mm<H3<4mm, in this case, Fig. 17C As shown, in the same distribution area 300, the light path formed between the second light source 202 and one of the first photoelectric converters 211 is the above-mentioned short-range light path. Similarly, the effective depth of the short-range light path to the human skin can be the reticular dermis. In addition, 4mm≤H1≤7mm, 4mm≤H6<7mm. Similarly, the above-mentioned first distance H1 and the sixth distance H6 can be the same or different. At this time, in the same distribution area 300, the light path formed between the first light source 201 and one of the first photoelectric converters 211 is the above-mentioned medium-range light path. In the same distribution area 300, the light path formed between the second light source 202 and another first photoelectric converter 211 is the above-mentioned medium-range light path. Similarly, the effective depth of the medium-range light path to the human skin can be the reticular dermis.

[0137] In addition, 7mm<H4≤10mm, 7mm<H5≤10mm, Fig. 17CAs shown, the light path formed between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 is the above-mentioned long-range light path. Moreover, within the same distribution area 300, the light path formed between the first light source 201 and another first photoelectric converter 211 is the above-mentioned long-range light path. H2>10mm, the light path formed between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 is the above-mentioned ultra-long-range light path. Similarly, the effective depth of the above-mentioned long-range light path and the ultra-long-range light path to reach the human skin can be the fat layer. The technical effects of the above-mentioned distances are the same as described above and will not be repeated here.

[0138] As can be seen from the above, the detection device 20 can have optical paths of four distance ranges, namely, a short-range (below 4mm) optical path, a medium-range (4mm-7mm) optical path, a long-range (7mm-10mm) optical path, and an ultra-long-range (10mm) optical path. The PPG modules on the optical paths corresponding to different distance ranges can obtain different PIs of PPG data. In this way, the processor of the electronic device 01 can compare and analyze PPG data with different PIs according to the detection results of the detection device 20, so as to achieve the purpose of improving the detection data accuracy and signal-to-noise ratio. For example, as shown in Table 3, taking the detection device 20 detecting blood oxygen data as an example, when the optical paths of the above four distance ranges are used, the proportion of abnormal data generated by the interference of the above interference sources in the collected blood oxygen data is 0.17%, and the blood oxygen detection accuracy (rms) is 4.23, and the data detection accuracy is relatively high. Among them, the smaller the value of the blood oxygen detection accuracy (rms), the higher the accuracy.

[0139] In comparison, when the detection device only has three optical paths of distance ranges, for example, a close range (less than 4 mm) optical path, a medium range (4 mm to 7 mm) optical path, and a long range (7 mm to 10 mm) optical path, as shown in Table 3, the proportion of abnormal data generated by the interference of the above-mentioned interference sources in the collected blood oxygen data increases to 1.63%, the blood oxygen detection accuracy (rms) increases to 5.13, and the data detection accuracy decreases. Alternatively, when the detection device only has three optical paths of distance ranges, for example, a close range (less than 4 mm) optical path, as shown in Table 3, the proportion of abnormal data generated by the interference of the above-mentioned interference sources in the collected blood oxygen data increases to 11.50%, the blood oxygen detection accuracy (rms) increases to 6.53, and the data detection accuracy decreases. Therefore, the more optical paths of different distance ranges the detection device 20 has, the higher the accuracy of the obtained health detection data.

[0140] Table 3

[0141]

[0142] The above description is based on an example in which the detection device 20 includes three second light sources 202. In other embodiments of the present application, for example Fig.19 As shown, the detection device 20 may include two second light sources 202. Based on this, the detection device 20 may have two distribution areas, namely, distribution area 300a and distribution area 300b, each distribution area having a second light source 202. Adjacent distribution areas 300a and 300b share the same first light source 201.

[0143] In other embodiments of the present application, Fig. 20 As shown, when the detection device 20 has three first light sources 201, six first photoelectric converters 211 and three second light sources 202, the detection device 20 can also include three third light sources 203 (a cross-filled pattern gem is used in the figure). Among them, a third light source 203 is arranged between two adjacent first photoelectric converters 211. In this way, each third light source 203 can form two light paths between the two first photoelectric converters 211 adjacent to the third light source 203, thereby increasing the number of light paths between two adjacent first photoelectric converters 211, so as to improve the detection accuracy. Among them, Fig. 20 The example is taken as an example that the detection device 20 includes three second light sources 202. In other embodiments of the present application, the detection device 20 can also include two second light sources 202. The corresponding detection device 20 has two distribution areas, and a second light source 202 is arranged in each distribution area.

[0144] In other embodiments of the present application, the detection device 20 may include: Fig.21 The four first light sources 201 and the four first photoelectric converters 211 are shown, and a first photoelectric converter 211 is arranged between two adjacent first light sources 201. In addition, two first light sources 201, a first photoelectric converter 211 and a second light source 202 are distributed in the distribution area, for example, the distribution area 300a. The technical effects of the first light source 201, the second light source 202 and the first photoelectric converter 211 are the same as described above, and will not be repeated here.

[0145] For example, continue as Fig.21As shown, within the same distribution area 300a, there is a first distance H1 between the first light source 201 and the first photoelectric converter 211, and there is a second distance H2 between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300a. Within the same distribution area 300a, there is a third distance H3 between the second light source 202 and the first photoelectric converter 211. There is a fourth distance H4 between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300a. The configuration methods and technical effects of the first distance H1, the second distance H2, the third distance H3 and the fourth distance H4 are the same as those described above and will not be repeated here.

[0146] In other embodiments of the present application, Fig. 22 As shown, the detection device 20 may include four first light sources 201 and four first photoelectric converters 211, and one first photoelectric converter 211 is disposed between two adjacent first light sources 201. In addition, the detection device 20 may also include four second photoelectric converters 221, and one second photoelectric converter 221 is disposed between two adjacent first photoelectric converters 211. In this case, one second photoelectric converter 221 and one first light source 201 are disposed between two adjacent first photoelectric converters 211.

[0147] Based on this, the detection device 20 has two distribution areas (distribution area 300a and distribution area 300b), and the detection device 20 may include two second light sources 202, and one of the second light sources 202 is located in one of the above distribution areas (distribution area 300a and distribution area 300b). In addition, two second photoelectric converters 221 and one first photoelectric converter 211 are distributed in the distribution area, such as distribution area 300a. In this way, in the same distribution area, any one of the first light source 201 and the second light source 202 can form a light path not only with the first photoelectric converter 211, but also with the second photoelectric converter 221, thereby achieving the purpose of increasing the number of light paths. In addition, the setting method of the distance between the above light sources and each photoelectric converter can be obtained in the same way, and will not be repeated here one by one.

[0148] In other embodiments of the present application, Fig.23 As shown, the detection device 20 may further include four second photoelectric converters 221, and the second photoelectric converters 221 are arranged in the detection area 200 (such as Fig.9A In addition, the detection device 20 may include four first light sources 201, four first photoelectric converters 211, and two second light sources 202, and a first photoelectric converter 211 is arranged between two adjacent first light sources 201. The detection device has two distribution areas, such as distribution area 300a and distribution area 300b.

[0149] Among them, any distribution area, for example, distribution area 300a, is distributed with two first photoelectric converters 211, a second photoelectric converter 221 located between the two first photoelectric converters 211, a second light source 202 and a first light source 201, and the second photoelectric converter 221 is located between the first light source 201 and the second light source 202. The detection device has two distribution areas 300, and a second light source 202 is located in one distribution area 300. In this way, in the same distribution area, any one of the first light source 201 and the second light source 202 can form a light path not only with the first photoelectric converter 211, but also with the second photoelectric converter 221, thereby achieving the purpose of increasing the number of light paths. In addition, the setting method of the distance between the above-mentioned light source and each photoelectric converter can be obtained in the same way, and will not be repeated here one by one.

[0150] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A detection device, characterized in that: include: at least three first light sources; at least three first photoelectric converters, at least one of the first photoelectric converters is disposed between two adjacent first light sources, and the at least three first light sources and the at least three first photoelectric converters enclose a detection area; at least two second light sources; being disposed within the detection area; The detection device has at least two distribution areas, and the first light source, the second light source and the first photoelectric converter are distributed in the distribution areas; Among them, within the same distribution area, there is a first distance H1 between the first light source and at least one of the first photoelectric converters; there is a second distance H2 between the first light source and at least one of the first photoelectric converters outside the distribution area; within the same distribution area, there is a third distance H3 between the second light source and at least one of the first photoelectric converters outside the distribution area; there is a fourth distance H4 between the second light source and at least one of the first photoelectric converters outside the distribution area; any two distances among the first distance H1, the second distance H2, the third distance H3 and the fourth distance H4 are different.

2. The detection device according to claim 1, characterized in that: 0mm<H1<4mm, 4mm≤H3<7mm; 7mm≤H4≤10mm; H2>10mm; or, 0mm<H3<4mm, 4mm≤H1<7mm; 7mm≤H4≤10mm; H2>10mm.

3. The detection device according to claim 1 or 2, characterized in that: The distribution area is distributed with two first light sources, one second light source located between the two first light sources, and at least one first photoelectric converter.

4. The detection device according to claim 3, characterized in that: The detection device includes three first light sources and six first photoelectric converters, two first photoelectric converters are arranged between two adjacent first light sources, and two first photoelectric converters are distributed in the distribution area.

5. The detection device according to claim 4, characterized in that: In the same distribution area, the first light source and the two first photoelectric converters are respectively separated by the first distance H1 and the fifth distance H5, and the first distance H1 and the fifth distance H5 are different; In the same distribution area, the second light source and the two first photoelectric converters are respectively at the third distance H3 and the sixth distance H6.

6. The detection device according to any one of claims 2 to 5, characterized in that: The first distance H1 in different distribution areas is the same; The second distance H2 in different distribution areas is the same; The third distance H3 in different distribution areas is the same; The fourth distance H4 in different distribution areas is the same.

7. The detection device according to claim 3, characterized in that: The detection device comprises three first light sources and three first photoelectric converters, one first photoelectric converter is arranged between two adjacent first light sources; and one first photoelectric converter is distributed in the distribution area.

8. The detection device according to any one of claims 4 to 7, characterized in that: The detection device has three distribution areas, and the detection device includes three second light sources, one of the second light sources is located in one of the distribution areas; Two adjacent distribution areas share the same first light source.

9. The detection device according to any one of claims 4 to 7, characterized in that: The detection device has two distribution areas, and the detection device includes two second light sources, one of the second light sources is located in one of the distribution areas; Two adjacent distribution areas share the same first light source.

10. The detection device according to any one of claims 4 to 6, characterized in that: The detection device further includes three third light sources; one third light source is arranged between two adjacent first photoelectric converters.

11. The detection device according to claim 3, characterized in that: The detection device comprises four first light sources, four first photoelectric converters and two second light sources; one first photoelectric converter is arranged between two adjacent first light sources; one first photoelectric converter is distributed in the distribution area; The detection device has two distribution areas, and one second light source is located in one distribution area.

12. The detection device according to claim 3, characterized in that: The detection device comprises four first light sources and four first photoelectric converters, and one first photoelectric converter is arranged between two adjacent first light sources; The detection device further includes four second photoelectric converters, wherein one second photoelectric converter is arranged between two adjacent first photoelectric converters; Two of the second photoelectric converters and one of the first photoelectric converters are distributed in the distribution area; The detection device has two distribution areas, and the detection device includes two second light sources, one of the second light sources is located in one of the distribution areas.

13. The detection device according to claim 1 or 2, characterized in that: The detection device further includes four second photoelectric converters, which are arranged in the detection area; The detection device comprises four first light sources, four first photoelectric converters and two second light sources, and one first photoelectric converter is arranged between two adjacent first light sources; Two first photoelectric converters, one second photoelectric converter located between the two first photoelectric converters, one second light source, and one first light source are distributed in the distribution area, and the second photoelectric converter is located between the first light source and the second light source; The detection device has two distribution areas, and one second light source is located in one distribution area.

14. The detection device according to any one of claims 1 to 13, characterized in that: Any one of the first light source and the second light source includes a first light emitting device and a second light emitting device, wherein the first light emitting device emits red light, and the second light emitting device emits infrared light.

15. The detection device according to claim 14, characterized in that: Any one of the first light source and the second light source further includes a third light emitting device, and the third light emitting device emits green light.

16. The detection device according to any one of claims 1 to 15, characterized in that: The detection device also includes: A light-transmitting cover plate, covering the first light source, the first photoelectric converter and the second light source; An optical film layer, disposed on a side of the light-transmitting cover plate facing the first light source; an ink layer, disposed between the optical film layer and the light-transmitting cover plate, wherein the ink layer is provided with a first light-transmitting hole, a second light-transmitting hole and a third light-transmitting hole; the first light-transmitting hole exposes the light-emitting surface of the first light source, the second light-transmitting hole exposes the light-emitting surface of the second light source, and the third light-transmitting hole exposes the light-receiving surface of the first photoelectric converter; The shading member is disposed on a side of the optical film layer away from the transparent cover plate, and the shading member is located between any two of the first light source, the second light source and the first photoelectric converter.

17. An electronic device, characterized in that: include: Circuit boards; The detection device according to any one of claims 1 to 16, wherein the detection device is arranged on the circuit board.

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