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

Detection device and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on November 7, 2023, with application number 202311479145.X and invention name “A detection device and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of health data detection, and in particular to a detection device and electronic equipment. Background Art

[0003] 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 the user's health sign data, such as heart rate and blood oxygen, so that users can understand their physical condition at any time and play a role in preventing diseases. Currently, a finger clip oximeter can be used to clamp the user's finger to detect blood oxygen in the finger part. However, this detection method makes the user's fingertips unable to move normally and has a squeezing feeling, and it is difficult to achieve real-time detection. To solve the above problems, wearable devices can be used to detect blood oxygen in 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.

[0004] Summary of the Invention

[0005] The present application provides a detection device and an electronic device for solving the problem that the tissue structure of the user's tested part is complex, resulting in low accuracy of health detection data.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In one aspect of the present application, a detection device is provided, comprising at least three first light sources, at least three first photoelectric converters, and at least two second light sources. At least one first photoelectric converter 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. Furthermore, a second light source is disposed within the detection area. Within the same distribution area, a first distance H1 exists between the first light source and at least one first photoelectric converter. A second distance H2 exists between the first light source and at least one first photoelectric converter outside the distribution area. Within the same distribution area, a third distance H3 exists between the second light source and at least one first photoelectric converter. A fourth distance H4 exists between the second light source and at least one first photoelectric converter outside the distribution area. Any two of the first distances H1, second distance H2, third distance H3, and fourth distance H4 are different. Based on this, the detection device comprises at least two distribution areas, wherein the first light sources, second light sources, and first photoelectric converters are distributed within the distribution areas. The first light sources used to enclose the detection area can be referred to as outer-circle first light sources, and the second light sources within the detection area can be referred to as inner-circle light sources.

[0008] In summary, at least one first photoelectric converter is positioned between two adjacent first light sources, and at least three first light sources and at least three first photoelectric converters define a detection area. When the detection device is in contact with the user's skin, the detection area determines the range of the area within which the detection device can detect the user's skin. Furthermore, at least two second light sources are positioned within the detection area, and the detection device has at least two distribution areas, within which the first light source, second light source, and first photoelectric converter are distributed. In this case, a light path can be formed between a first light source and a first photoelectric converter, such that the first light source and the first photoelectric converter in the light path constitute a PPG module. Similarly, a light path can be formed between a second light source and a first photoelectric converter, such that the second light source and the first photoelectric converter in the light path constitute a PPG module. The PPG module is capable of detecting the user's pulse data. By providing the distribution areas, the number of light paths and the number of PPG modules corresponding to each light path in the detection area can be increased. This allows for more PPG module detection results of the user's pulse data when the user's skin contacts the detection area, thereby minimizing interference with detection data in local areas within the detection area, which can lead to reduced detection data accuracy. On this basis, the spacing between the light source and the photoelectric converter can determine the effective depth at which the light emitted by the light source reaches the skin (at this effective depth, the proportion of PPG signals is high). Therefore, within the same distribution area, a first distance H1 exists between the first light source and at least one first photoelectric converter. A second distance H2 exists between the first light source and at least one first photoelectric converter outside the distribution area. Within the same distribution area, a third distance H3 exists between the second light source and at least one first photoelectric converter outside the distribution area. If a fourth distance H4 exists between the second light source and at least one first photoelectric converter outside the distribution area, the first light source can have the first distance H1 and the second distance H2, respectively, with at least two of all first photoelectric converters, and the second light source can have the third distance H3 and the fourth distance H4, respectively, with at least two of all first photoelectric converters. Any two of these four distances are different, so the detection device can have optical paths with at least four different distances. The PPG module corresponding to each optical path can obtain PPG data for a different skin depth, enabling the detection device to obtain PPG data for at least four depths. In this way, the electronic device can not only compare and analyze the PPG data obtained from different optical paths in the detection area based on the detection results of the detection device, but also compare and analyze the PPG data with different PIs, so that the final output PPG data has higher accuracy.

[0009] 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 above-mentioned distance setting method and technical effects are the same as described above and will not be repeated here.<h1>

[0010] In an optional embodiment, the distribution area includes two first light sources, a second light source located between the two first light sources, and at least one first photoelectric converter. Thus, within the same distribution area, not only can light paths be formed between the two adjacent first light sources and the first photoelectric converter, but also between the two first light sources, the second light source can form a light path with the first photoelectric converter. This increases the number of light paths between the two adjacent first light sources, making the area covered by the light paths larger within the entire detection area. The detection device can obtain more PPGs from different light paths, reducing the impact of interference caused by a large proportion of DC signals in local areas on the detection results, thereby improving detection accuracy.

[0011] In one optional embodiment, the detection device includes three first light sources and six first photoelectric converters, with two first photoelectric converters spaced apart between two adjacent first light sources, and two first photoelectric converters distributed within the distribution area. The technical effects of the first light sources and first photoelectric converters are the same as those described above and are not further elaborated here.

[0012] In an optional embodiment, within the same distribution area, a first distance H1 and a fifth distance H5 are respectively formed between the first light source and the two first photoelectric converters. For example, H1 < H5, 4mm ≤ H5 < 7mm, or 7mm ≤ H5 ≤ 10mm. Within the same distribution area, the optical path formed between the first light source and one of the first photoelectric converters is a short-range optical path, and the optical path formed between the first light source and the other first photoelectric converter is the aforementioned medium-range optical path. Within the same distribution area, a third distance H3 and a sixth distance H6 are respectively formed between the second light source and the two first photoelectric converters. For example, 4mm ≤ H6 < 7mm, and within the same distribution area, the optical path formed between the second light source and any one of the first photoelectric converters is the aforementioned medium-range optical path. In this way, the detection device can obtain PPG data at six depths. The technical effects of PPG data at multiple depths are the same as described above and will not be repeated here.

[0013] In one optional embodiment, the first distance H1 is the same in different distribution areas, the second distance H2 is the same in different distribution areas, the third distance H3 is the same in different distribution areas, and the fourth distance H4 is the same in different distribution areas. 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, thereby improving the appearance quality of the electronic device.

[0014] In an optional embodiment, the detection device includes three first light sources and three first photoelectric converters, wherein a first photoelectric converter is provided between two adjacent first light sources, and a first photoelectric converter is distributed within 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.

[0015] In one optional embodiment, the detection device has three distribution areas and includes three second light sources, one second light source located in each distribution area, and two adjacent distribution areas share the same first light source. The technical effects of the second light source, first light source, and distribution areas are the same as described above and are not further described here.

[0016] In an optional embodiment, the detection device has two distribution areas and includes two second light sources, one second light source located in each distribution area, and two adjacent distribution areas share the same first light source. The technical effects of the second light source, first light source, and distribution areas are the same as described above and are not further described here.

[0017] In an optional embodiment, the detection device further includes three third light sources, with one third light source disposed between two adjacent first photoelectric converters. In this manner, each third light source can form two light pathways between two adjacent first photoelectric converters, thereby increasing the number of light pathways between two adjacent first photoelectric converters.

[0018] In one optional embodiment, the detection device includes four first light sources, four first photoelectric converters, and two second light sources, with a first photoelectric converter positioned between two adjacent first light sources, and a first photoelectric converter distributed within a distribution area. The detection device has two distribution areas, with one second light source located within each distribution area. The technical effects of the first light sources, first photoelectric converters, and distribution areas are the same as those described above and are not further elaborated here.

[0019] 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, within 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.

[0020] In an optional embodiment, the detection device further includes four second photoelectric converters, which 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.

[0021] In one optional embodiment, either the first light source or 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 primarily absorbed by deoxygenated hemoglobin in the blood, while infrared light is primarily absorbed by oxyhemoglobin in the blood. Therefore, the processor in the electronic device can utilize the difference in absorption between red and infrared light detected by the detection device to calculate blood oxygen saturation by measuring the ratio of deoxyhemoglobin to oxyhemoglobin in the blood, thereby obtaining blood oxygen data.

[0022] In an optional embodiment, either the first light source or the second light source further includes a third light-emitting device that emits green light. Because human blood has a stronger absorption rate for green light, the green light emitted by the first light-emitting device can increase the accuracy of the heart rate data detected by the detection device.

[0023] In an optional embodiment, the detection device further includes a translucent cover plate, an optical film layer, an ink layer and a light-shielding member. The translucent cover plate is covered on the first light source, the first photoelectric converter and the second light source. The translucent cover plate can be made of a translucent 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 translucent 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 of the electronic device covered by the translucent cover plate 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 translucent 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 block the remaining components of the detection device except for 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 transparent 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 light from crossing between the first light source and the second light source, 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.

[0024] In one aspect of the present application, an electronic device is provided, comprising a circuit board and any one of the detection devices described above, the detection device being disposed on the circuit board. The electronic device has the same technical effects as the detection device provided in the aforementioned embodiment, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1A is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0026] FIG1B is a schematic diagram of the exploded structure of the electronic device in FIG1A ;

[0027] FIG2A is a schematic diagram of the installation position of the detection device in FIG1B in an electronic device;

[0028] FIG2B is a schematic diagram of the installation position of the detection device in FIG1B in another electronic device;

[0029] FIG2C is a schematic diagram of the installation position of the detection device in FIG1B in another electronic device;

[0030] FIG3 is a schematic diagram of wearing an electronic device provided in an embodiment of the present application;

[0031] FIG4 is a schematic structural diagram of a detection device provided in an embodiment of the present application;

[0032] FIG5A is a detection schematic diagram of a blood oximeter provided by the related art;

[0033] FIG5B is a schematic diagram of the detection principle of the oximeter in FIG5A ;

[0034] FIG6 is a schematic diagram of a cross-sectional structure of human skin provided in an embodiment of the present application;

[0035] FIG7 is a schematic diagram of a PPG wave generation principle provided by an embodiment of the present application;

[0036] FIG8A is a schematic diagram of PPG waves obtained from different parts of the human body according to an embodiment of the present application;

[0037] FIG8B is a schematic diagram of the detection principle of a detection device provided in an embodiment of the present application;

[0038] FIG9A is a schematic structural diagram of a detection device provided in an embodiment of the present application;

[0039] FIG9B is a schematic diagram showing a distribution area division of the detection device shown in FIG9A ;

[0040] FIG9C is a schematic diagram showing another distribution area division of the detection device shown in FIG9A ;

[0041] FIG10 is a schematic structural diagram of another detection device provided in an embodiment of the present application;

[0042] FIG11A is a schematic diagram of an optical path of the detection device shown in FIG9A ;

[0043] FIG11B is a schematic diagram of an optical path of a detection device provided in an embodiment of the present application;

[0044] FIG11C is a schematic diagram of another optical path of the detection device provided in an embodiment of the present application;

[0045] FIG12 is a schematic diagram of the detection principle of another detection device provided in an embodiment of the present application;

[0046] FIG13 is a schematic diagram of light paths at various distances for the detection device shown in FIG9A ;

[0047] FIG14 is a schematic diagram of a display state of an electronic device provided in an embodiment of the present application;

[0048] FIG15 is a schematic structural diagram of the first light source in FIG9A;

[0049] FIG16 is a schematic structural diagram of another detection device provided in an embodiment of the present application;

[0050] FIG17A is a schematic diagram showing a distribution area division of the detection device shown in FIG16 ;

[0051] FIG17B is a schematic diagram of an optical path of the detection device shown in FIG16 ;

[0052] FIG17C is a schematic diagram of light paths of various distances in the detection device shown in FIG16 ;

[0053] FIG17D is another schematic diagram of light paths of various distances of the detection device shown in FIG16 ;

[0054] FIG18 is a schematic diagram of signal proportions at different skin depths according to an embodiment of the present application;

[0055] FIG19 is a schematic structural diagram of another detection device provided in an embodiment of the present application;

[0056] FIG20 is a schematic structural diagram of another detection device provided in an embodiment of the present application;

[0057] FIG21 is a schematic diagram of light paths of various distances in the detection device shown in FIG20 ;

[0058] FIG22 is a schematic structural diagram of another detection device provided in an embodiment of the present application;

[0059] FIG23 is a schematic structural diagram of another detection device provided in an embodiment of the present application.

[0060] Figure markings: 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-light-shielding member; 304-ink layer; 3041-first light-transmitting hole; 3042-second light-transmitting hole; 3043-third light-transmitting hole; 203-third light source; 221-second photoelectric converter. DETAILED DESCRIPTION

[0061] 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 the embodiments.

[0062] In the following, the terms "first," "second," etc., are used for descriptive convenience only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified 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.

[0063] 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 connection; or, "connection" can be a direct connection or an indirect connection through an intermediate medium.

[0064] 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.

[0065] 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.

[0066] An embodiment of the present application provides an electronic device that 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.

[0067] The electronic device in the embodiment of the present application can 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.). For example, the above-mentioned smart wearable device can be a smart watch, a smart bracelet, smart glasses, a smart helmet, or a smart headset. Alternatively, the above-mentioned electronic device can 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 can 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. The embodiment of the present application is not limited to this.

[0068] For the sake of convenience, the following description uses the electronic device 01 shown in FIG1A as an example of a smartwatch capable of performing health checks. For example, the electronic device 01 may include a display 10, a middle frame 11, and a rear cover 12 as shown in FIG1B. Continuing with FIG1B, the display 10 may be disposed within the middle frame 11, with the display surface of the display 10 located on the side facing away from the rear cover 12, and the middle frame 11 may be disposed around the display 10. The display 10 may be a liquid crystal display (LCD), an organic light emitting diode (OLED), or a micro or mini light emitting diode (LED) display. The present application does not limit the shape of the display 10. For example, the display surface of the display 10 may be circular or rectangular. The outlines of the middle frame 11 and the rear cover 12 may match the outline of the display 10. For the sake of convenience, the following description is made by taking the outline shapes of the display screen 10 , the middle frame 11 and the rear cover 12 as circular as an example.

[0069] On this basis, the electronic device 01 may further include a circuit board 13 (as shown in FIG1B ), a battery, a processor, a sensor, a microphone, a speaker, and other components. In some embodiments of the present application, the circuit board, battery, processor, sensor, microphone, speaker, and other components may be disposed between the display screen 10 and the rear housing 12. The middle frame 11 may support the entire electronic device 01.

[0070] 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 processing unit (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.

[0071] In addition, in order to detect health parameters, such as heart rate and blood oxygen data, the above-mentioned electronic device 01 may also include a detection device 20 as shown in Figure 1B. The detection device 20 can be located in the accommodation space surrounded by the display screen 10, the middle frame 11 and the back 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 shown in Figure 2A (the top view obtained along the direction A in Figure 1A), the back shell 12 can expose a part of the detection device 20. Figure 2A is an illustration using the electronic device 01 as a smart watch as an example. When the electronic device 01 is a bracelet as shown in Figure 2B (the top view obtained along the direction A in Figure 1A) or a mobile phone as shown in Figure 2C (the top view obtained along the direction A in Figure 1A), the back shell 12 of the electronic device 01 may also expose a part of the detection device 20.

[0072] Among them, Figures 2A, 2B and 2C are only examples of the rear shell 12 exposing a portion of the detection device 20, and do 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 above-mentioned electronic device 01 can 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 can be in contact with the user's skin. For the convenience of explanation, the following examples are all taken as an example of the electronic device 01 being the smart watch shown in Figure 2A.

[0073] Based on this, when the electronic device 01 is a smartwatch, as shown in FIG3 , the user can wear the electronic device 01 on the left hand (or right hand), and the rear housing 12 of the electronic device 01 (as shown in FIG2A ) can contact 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 can include at least one photoplethysmograph (PPG) module as shown in FIG4 .

[0074] The specific working principle of the PPG module can 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 to the surrounding area of ​​the body, the part to be measured becomes congested, and the blood volume increases. When the heart relaxes, the blood in the part to be measured 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 can 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.

[0075] Based on this, the PPG module shown in Figure 4 may include a light source, such as an LED and a photodetector (PD). The LED and PD are located on the same side of the user's skin 100, and the PPG module is a reflective PPG module. Human skin 100 absorbs and scatters visible and infrared light. When light emitted by the LED shown in Figure 4 is irradiated onto skin 100, the blood flow in skin 100 (for example, changes in blood flow caused by heartbeats) and the hemoglobin content in the blood affect the amount of light absorbed, which in turn affects the light scattering by skin 100. By capturing the light scattered by skin 100 using the PD, the temporal variation of light intensity related to blood volume in the human body can be detected, i.e., a photoplethysmogram. The photoplethysmogram can reflect the characteristics of blood flow and hemoglobin content, and thus data such as heart rate and blood oxygen can be obtained.

[0076] The above is an example of an LED as the light source in the PPG module. 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.

[0077] In the related art, as shown in FIG5A , a user can clip a finger into a finger-clip oximeter 02 so that the fingertip of the user can be detected by the finger-clip oximeter 02 to obtain blood oxygen and heart rate data. In this case, as shown in FIG5B , 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 fingertip unable to move normally and have a squeezing feeling, and it is difficult to achieve real-time detection. Therefore, the electronic device 01 provided in the embodiment of the present application adopts a reflective PPG module as shown in FIG4 , and takes the detection device 20 in the electronic device 01 as an example to test the user's wrist for illustration.

[0078] Based on this, as shown in Figure 6, the human skin 100 can 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). The dermis 103 can include a papillary dermis, an upper vascular plexus, a reticular dermis and a lower vascular plexus (not shown in the figure). 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 can include a fat layer, fascia (not shown in the figure), etc., and a small number of small arteries 1031 and large arteries 1041 are distributed in the subcutaneous tissue 104. 6 is only intended to illustrate that capillaries 1021 and arterioles 1031 are distributed in the dermis 102 , and a small portion of arterioles 1031 and arteries 1041 are distributed in the subcutaneous tissue 104 , and does not constitute a limitation on the relative positional relationship among the capillaries 1021 , arterioles 1031 and arteries 1041 .

[0079] In this case, as shown in Figure 7, the data acquired by the PPG module that generates the aforementioned AC signal is the pulsatile component of artery blood (①) in the aorta 1041 (shown in Figure 6). When the pulsatile component of artery blood ① is at peak position a1, the blood volume in the aorta 1041 (shown in Figure 6) is the largest. Therefore, the arterial blood has the highest absorption rate of the light emitted by the PPG module's LED. At this time, the optical signal received by the PPG PD is the smallest, corresponding to the trough position a2 of the AC signal. Furthermore, when the pulsatile component of artery blood ① is at trough position b1, the blood volume in the aorta 1041 (shown in Figure 6) is the smallest. Therefore, the arterial blood has the lowest absorption rate of the light emitted by the PPG module's LED. At this time, the optical signal received by the PPG PD is the largest, corresponding to the peak position b2 of the AC signal. The waveform of this AC signal changes periodically over time.

[0080] Furthermore, the absorption rates of the non-pulsatile component of artery blood (②), venous blood (③), and other tissues (④) (e.g., human bones, muscles, pigment, and hair) shown in Figure 7 for the light emitted by the LED in the PPG module remain essentially unchanged. Therefore, the optical signals received by the PD in the PPG from these three components (②, ③, and ④ in Figure 7) remain essentially unchanged. Therefore, the PPG detection results include not only the AC signal but also the direct current (DC) signal generated by these three components (②, ③, and ④ in Figure 7). The magnitude of this DC signal does not change over time.

[0081] Based on this, as shown in Figure 8A , the vascular density of the human wrist is lower than that of the fingertips, and the wrist structure is more complex. For example, the wrist includes not only skin but also bones, muscles, pigment, hair, and other components capable of generating DC signals. Therefore, the amplitude (or signal strength) of the AC signal component AC1 detected by the PPG module at the wrist will be lower than the amplitude (or signal strength) of the AC signal component AC2 detected by the PPG module at the fingertips.

[0082] The detection accuracy of the detection device 20 with the aforementioned PPG module is affected by the perfusion index (PI). The higher the PI, the higher the detection accuracy of the detection device 20, and vice versa. The PI can be the ratio of the AC signal to the DC signal. Therefore, as shown in FIG8A , the PI value detected by the detection device 20 on the wrist is lower than the PI value detected by the detection device 20 on the fingertips. Furthermore, as shown in FIG8B , the portion of the user's skin 100 that generates the DC signal acts as an interference source, interfering with the signal detected by the PPG module, thereby reducing the signal-to-noise ratio (SNR) of the detection device 20. Furthermore, the detection accuracy of the detection device 20 is also affected by other noise, such as noise caused by electronic circuit interference and device state offsets. When light emitted by the LED enters the skin, it forms a "banana-shaped" optical path, as shown in FIG8B . The light is received by the PD through this optical path, enabling the PPG module to detect data such as the user's blood oxygen level and heart rate.

[0083] 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 may include at least three first light sources 201, at least three first photoelectric converters 211, and at least two second light sources 202, as shown in Figure 9A. Figure 9A is an example in which the detection device includes three first light sources 201, three first photoelectric converters 211, and three second light sources 202.

[0084] Based on this, as shown in Figure 9A , at least one first photoelectric converter 211 is provided 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 provided within the detection area 200. The first light sources 201 used to enclose the detection area 200 can be referred to as outer-circle first light sources, and the second light sources 202 located within the detection area 200 can be referred to as inner-circle light sources.

[0085] The detection area 200 refers to the range of the skin covered by the detection area 200 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, which can be the area range of the user's skin that the detection device 20 in the electronic device 01 can detect.

[0086] For ease 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 their actual appearance.

[0087] On this basis, as shown in FIG9B , the detection device 20 may have a distribution area 300 (an area defined by the intersection of the dotted line and the edge of the detection device 20 in FIG9B ). The first light source 201, the second light source 202, and the first photoelectric converter 211 are distributed within the distribution area 300. For example, two first light sources 201, one second light source 202, and one first photoelectric converter 211 may be distributed within the distribution area 300 shown in FIG9B .

[0088] FIG9B illustrates an example in which the detection device 20 includes three second light sources 202. Based on this, as shown in FIG9C , 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. A second light source 202 is disposed in each of 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 (e.g., a first light source 201a, a first light source 201b, and a first light source 201c), three second light sources (e.g., a second light source 202a, a second light source 202b, and a second light source 202c), and three first photoelectric converters (e.g., a first photoelectric converter 211a, a first photoelectric converter 211b, and a first photoelectric converter 211c).

[0089] Furthermore, 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 the same first light source 201a, the first distribution area 300b and the first distribution area 300c share the same first light source 201b, and the first distribution area 300c and the first distribution area 300a share the same first light source 201c.

[0090] In this case, within the same distribution area (for example, distribution area 300a), when a first photoelectric converter 211a is provided between two adjacent first light sources, for example, 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 position 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 (for example, the first light source 201a and the first light source 201c), so that the area covered by the light path in the entire detection area 200 (as shown in Figure 9A) is larger, and the detection device 20 obtains more PPGs from different light paths, which can reduce the influence of interference caused by the large proportion of DC signals in local areas on the detection results, which is conducive to improving the detection accuracy.

[0091] The above description is based on the example of the detection device 20 shown in FIG9C having three second light sources 202. In other embodiments of the present application, as shown in FIG10 , the detection device 20 may have two second light sources 202. In this case, the detection device 20 may have two distribution areas, namely a first distribution area 300a and a first distribution area 300b, with a second light source 202 provided in each of the first distribution area 300a and the first distribution area 300b. In addition, the two adjacent distribution areas (e.g., the first distribution area 300a and the second distribution area 300b) described above share the same first light source 201.

[0092] The above examples illustrate how the number of distribution areas 300 may be configured based on the number of second light sources 202. This does not limit the number of second light sources 202 and distribution areas 300. As long as the distribution area 300 contains a first light source 201, a second light source 202, and a first photoelectric converter 211, the configuration will be sufficient. For ease of explanation, the following example uses the three second light sources shown in FIG. 9C as an example.

[0093] In this case, as shown in FIG11A , a light path (indicated by a solid arrow in FIG11A ) can be formed between a first light source 201 and a first photoelectric converter 211 in the detection device 20. For example, as shown in FIG11B , light emitted by the first light source 201 is incident on the skin 100. After being absorbed and scattered by the skin 100, some of the scattered light can be incident on the first photoelectric converter 211, thereby forming light path ①. In this way, the first light source 201 and the first photoelectric converter 211 forming the above-mentioned light path ① can constitute a PPG module, which can detect the user's pulse data.

[0094] As shown in FIG11B , 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 serve as at least a portion of the rear housing 12 in FIG1B , and may be disposed over the first light source 201, the first photoelectric converter 211, and the second light source 202. The transparent cover plate 302 may be made of a transparent material having a light transmittance of at least 80%, such as glass, transparent resin, or sapphire. Furthermore, the optical film layer 301 may be disposed on the side of the transparent cover plate 302 facing the first light source 201. The optical film layer 301 may be a Fresnel film layer that transmits light from the light source and light reflected or scattered by the skin. It may also shield components of the electronic device 01 covered by the transparent cover plate 302, preventing the user from clearly viewing the internal structure of the detection device 20.

[0095] Continuing with FIG11B , an ink layer 304 can be disposed between the optical film layer 301 and the transparent cover plate 302. 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 manner, the ink layer 304 can shield the remaining components of the detection device 20 except for the first light source 201, the second light source 202, and the first photoelectric converter 211. 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 source 202, and the third light-transmitting hole 3043, respectively, to form the aforementioned light paths ① and ②.

[0096] On this basis, in order to prevent light from crossing between the first light source 201 and the second light source 202, or to prevent 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 aforementioned light shielding member 303. The light shielding member 303 may be disposed on the side of the optical film layer 301 facing away from the transparent cover plate 302, and the light shielding 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, thereby providing a light shielding function. A transparent adhesive layer (indicated by a hatched pattern in the figure) may be used to bond the light shielding member 303 to the optical film layer 301, and between the optical film layer 301 and the ink layer 304.

[0097] Similarly, as shown in FIG11A , a light path (indicated by a dotted arrow in FIG11A ) can also be formed between a second light source 202 and a first photoelectric converter 211. For example, as shown in FIG11B , light emitted by the second light source 202 is incident on the skin 100. After being absorbed and scattered by the skin 100, some of the scattered light can be incident on the first photoelectric converter 211, thereby forming light path ②. In this way, the second light source 202 and the first photoelectric converter 211 forming the above light path ② can constitute a PPG module.

[0098] Based on this, since the distribution area 300 (as shown in FIG9B ) of the detection device 20 provided in the embodiment of the present application is provided with a first light source 201, a second light source 202, and a first photoelectric converter 211, and the detection device 20 can have at least two distribution areas, the number of optical paths and PPG modules corresponding to each optical path in the detection area 200 (as shown in FIG9A ) of the detection device 20 can be increased, so that the above-mentioned detection area 200 covering the user's skin can 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 the interference source shown in FIG8B 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, thereby achieving the purpose of improving the accuracy of the detection data and the signal-to-noise ratio.

[0099] In addition, when the spacing between the LED and the PD is different, the effective depth to which the light emitted by the LED reaches the skin (at the effective depth, the proportion of the PPG signal in each layer of the skin is high) is different. For example, as shown in FIG11B , the distance between the second light source 202 and the first photoelectric converter 211 is closer. Therefore, the depth to which the light in optical path ① (from the first light source 201) reaches the skin 100 can be greater than the depth to which the light in optical path ② (from the second light source 202) reaches the skin 100. Alternatively, for another example, as shown in FIG11C , 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 to which the light in optical path ① (from the first light source 201) reaches the skin 100 can be the same or approximately the same as the depth to which the light in optical path ② (from the second light source 202) reaches the skin 100.

[0100] In this case, as can be seen above, the portion of skin 100 used to generate a DC signal will act as an interference source, as shown in Figure 12, interfering with the signal detected by the PPG module. Furthermore, the aorta 1041 capable of generating the AC signal shown in Figure 7 is located within the subcutaneous tissue 104 shown in Figure 6, which is located deeper than the epidermis 102 and 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. Therefore, in Figure 12, because the light in optical path ① (from the first light source 201) reaches the skin 100 at a greater depth than the light in optical path ② (from the second light source 202), 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.

[0101] As can be seen from the above, in the optical path, the depth at which light reaches the skin varies, resulting in different PIs for the obtained detection results. Therefore, to enable the detection device 20 to obtain detection results with different PIs, thereby improving the accuracy and signal-to-noise ratio of the detection results of the detection device 20, as shown in FIG13 , within the same distribution area 300, a first distance H1 is defined 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 within the distribution area 300, within the same distribution area 300, the first light source 201 can have a first distance H1 with one of the first photoelectric converters 211, and the distances between the first light source 201 and the remaining first photoelectric converters 211 can be the same as or different from the first distance H1.

[0102] 13 , a second distance H2 is provided 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, the second distance H2 is provided between the first light source 201 and one of the first photoelectric converters 211 outside the distribution area 300. 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.

[0103] For example, as shown in FIG13 , within the same distribution area 300, a first distance H1 exists between the first light source 201 and the first photoelectric converter 211. A second distance H2 exists between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300, where H1 < H2. For example, if 0 mm < H1 < 4 mm, the light path formed between the first light source 201 and the first photoelectric converter 211 within the same distribution area 300 may be a short-range light path (less than 4 mm). Alternatively, if 4 mm ≤ H1 < 7 mm, the light path formed between the first light source 201 and the first photoelectric converter 211 within the same distribution area 300 may be a medium-range light path (4 mm to 7 mm). Furthermore, if H2 > 10 mm, the light path formed between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 may be an ultra-long-range light path (more than 10 mm).

[0104] 13 , within the same distribution area 300, a third distance H3 is defined 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 within the distribution area 300, the third distance H3 may be defined between the second light source 202 and one of the first photoelectric converters 211 within the same distribution area 300. The distances 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.

[0105] Furthermore, a fourth distance H4 is defined 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, the fourth distance H4 is defined between the second light source 202 and one of the first photoelectric converters 211 outside the distribution area 300. 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. Any two of the first distance H1, the second distance H2, the third distance H3, and the fourth distance H4 may be different.

[0106] For example, as shown in FIG13 , within the same distribution area 300, a third distance H3 is defined between the second light source 202 and the first photoelectric converter 211. A fourth distance H4 is defined between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300, where H3<H4<H2. For example, when 0 mm < H1 < 4 mm, and 4 mm ≤ H3 < 7 mm, then, if the optical path formed between the first light source 201 and the first photoelectric converter 211 within the same distribution area 300 is a short-range optical path (less than 4 mm), the optical path formed between the second light source 202 and the first photoelectric converter 211 within the same distribution area 300 may be a medium-range optical path (4 mm to 7 mm). Alternatively, when 4 mm ≤ H1 < 7 mm, and 0 mm < H3 < 4 mm, in which case, if the light path formed between the first light source 201 and the first photoelectric converter 211 within the same distribution area 300 is a medium-range (4 mm to 7 mm) light path, the light path formed between the second light source 202 and the first photoelectric converter 211 within the same distribution area 300 may be a short-range (4 mm or less) light path. Furthermore, if 7 mm ≤ H4 ≤ 10 mm, in this case, the light path formed between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 may be a long-range (7 mm to 10 mm) light path.

[0107] 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.

[0108] Based on this, the detection device 20 can have optical paths corresponding to at least four distances (a first distance H1, a second distance H2, a third distance H3, and a fourth distance H4). The PPG modules on the optical paths corresponding to different distances can acquire PPG data with different PIs. In this way, the processor of the electronic device 01 can compare and analyze PPG data with different PIs based on the detection results of the detection device 20, thereby improving the accuracy and signal-to-noise ratio of the detection data.

[0109] As shown in FIG13 , the same first photoelectric converter 211 can receive light from different first light sources 201 or different second light sources 202. To enable the processor of the electronic device 01 to distinguish PPG data from different light paths, the detection device 20 can implement time-sharing driving between the first light source 201 and the second light source 202, between different first light sources 201, and between different second light sources 202, so that different light sources can be illuminated in a time-sharing manner. This application does not limit the manner in which different light sources are driven in a time-sharing manner.

[0110] As can be seen from the above, the processor of the electronic device 01 can compare and analyze not only the PPG data obtained from different optical paths in the detection area 200, but also the PPG data with different PIs, based on the detection results of the detection device 20, thereby obtaining the final PPG data to be output as the detection result. For example, when the electronic device 01 having the above-mentioned detection device 20 has a display function, as shown in Figure 14, 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 a timely manner.

[0111] In order to obtain the above-mentioned blood oxygen data, in some embodiments of the present application, any one of the above-mentioned first light source 201 and second light source 202 may include the first light-emitting device 2001 and the second light-emitting device 2002 shown in Figure 15, and the first light-emitting device 2001 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, while infrared light is mainly absorbed by oxyhemoglobin in the blood. Therefore, the processor in the above-mentioned electronic device 01 can use the absorption difference between 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.

[0112] In addition, it can be seen from the above that the user's heart rate can be determined based on the trough a2 position (corresponding to the systolic peak) and the peak b2 position (corresponding to the diastolic peak) in the AC signal shown in Figure 7. The above 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 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, as shown in Figure 15, 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, and 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, and the third light-emitting device 2003 emits green light.

[0113] Figure 15 illustrates an example in which 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. Furthermore, Figure 15 merely illustrates the placement of the first light-emitting device 2001, the second light-emitting device 2002, and the third light-emitting device 2003. This application does not limit the placement of these light-emitting devices.

[0114] In addition, the above description is based on the 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 derive 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.

[0115] The following describes the structure of the detection device 20 by taking into account the number and location of the first light sources 201, the second light sources 202, and the first photoelectric converters 211 within the distribution area, as well as the number of light sources and photoelectric converters in the entire detection device 20. In other embodiments of the present application, as shown in FIG16 , the detection device 20 may include three first light sources 201 and six first photoelectric converters 211, with two first photoelectric converters 211 spaced apart between two adjacent first light sources 201.

[0116] Furthermore, two first light sources 201 are distributed within 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, within the same distribution area, each first light source 201 can form two light pathways with the two first photoelectric converters 211, and between the two first light sources 201, each second light source 202 can form two light pathways with the first photoelectric converter 211, thereby increasing the number of light pathways between two adjacent first light sources 201.

[0117] On this basis, as shown in Figure 17A, the detection device 20 can 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.

[0118] In this case, as shown in FIG17B , in the detection device 20, a light path (indicated by a solid arrow in FIG17B ) can be formed between a first light source 201 and a first photoelectric converter 211. The first light source 201 and the first photoelectric converter 211 forming the above light path can constitute a PPG module. In addition, a light path (indicated by a dotted arrow in FIG17B ) can also be formed between a second light source 202 and a first photoelectric converter 211. The second light source 202 and the first photoelectric converter 211 forming the above light path can constitute a PPG module.

[0119] In this way, when the multiple first light sources 201 and the multiple second light sources 202 are driven in a time-sharing manner, as shown in FIG17B , each light source (the first light source 201 or the second light source 202) can form an optical path (indicated by an arrow) 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 optical paths formed intersect with each other within the detection area 200 (as shown in FIG9A ), increasing the density of the optical paths, so that the entire detection area 200 is covered by the optical paths. A larger area, more PPGs from different optical paths are obtained by the detection device 20, which can reduce the impact of interference caused by a large proportion of DC signals in local areas on the detection results, thereby improving detection accuracy.

[0120] As can be seen from the above, the depth at which light reaches the skin in the optical path varies, resulting in different PIs for the obtained detection results. Therefore, to enable the detection device 20 to obtain detection results with different PIs, thereby improving the accuracy and signal-to-noise ratio of the detection results of the detection device 20, for example, as shown in FIG17C , 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. These first distances H1 and H5 may be different. A second distance H2 is defined between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300, where H1 < H5 < H2. Furthermore, 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. A fourth distance H4 is defined between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300, where H3 < H4 and H6 < H4.

[0121] In some embodiments of the present application, 0mm

[0122] ​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 ratio of a tissue layer in the skin (for example, the reticular dermis layer) refers to the ratio of the detection signal formed by the scattered light from this tissue layer (for example, the reticular dermis layer) 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 layer) to the total detection signals received by the PD from all tissue layers of the skin. Therefore, the depth of the tissue layer (for example, the reticular dermis layer) corresponding to the above signal ratio is the depth to which the light penetrates the skin.

[0123] Therefore, a larger signal percentage indicates the depth to which the majority of the light emitted by the light source in the PPG module penetrates the skin, i.e., the effective depth. Based on this, the data in Table 1 shows that when H1 = 3.2 mm, the PPG module corresponding to the first distance H1 obtains the highest signal percentage (41.04%) in the reticular dermis. Therefore, the effective depth of the near-range light path reaching the human skin with the first distance H1 can be the reticular dermis.

[0124] Furthermore, 4mm≤H3<7mm, 4mm≤H6<7mm, and 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 to 7mm. In this case, as shown in FIG17C , within the same distribution area 300, the light path formed between the second light source 202 and any one of the first photoelectric converters 211 is the above-mentioned medium-range light path. Furthermore, 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 medium-range light path.

[0125] For example, when H3, H5 or H6 is 5.5mm, 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 share is 0.58%), the upper vascular plexus (signal share is 1.16%), the reticular dermis layer (signal share is 23.58%) and the lower vascular plexus (signal share is 16.22%), as well as the fat layer in the subcutaneous tissue (signal share 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 share (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.

[0126] Similarly, 7mm≤H4≤10mm, as shown in FIG17C , 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 share is 1.00%), the reticular dermis (signal share is 2.02%), and the lower vascular plexus (signal share is 8.54%), as well as the fat layer in the subcutaneous tissue (signal share is 88.44%). Therefore, the PPG module corresponding to the fourth distance H4 has the highest signal share (88.44%) obtained in the fat layer. Therefore, the long-range optical path with the above-mentioned fourth distance H4 can effectively reach the fat layer in the human skin.

[0127] Similarly, when H2 is greater than 10 mm, as shown in FIG17C , 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 is 10.2 mm, 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%), as well as 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 effectively reach the fat layer in depth.

[0128] Table 1

[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 Figure 17D, the first distance H1 in different distribution areas (for example, distribution area 300a and distribution area 300b) can be the same, the second distance H2 in different distribution areas (for example, distribution area 300a and distribution area 300b) can be the same, the third distance H3 in different distribution areas (for example, distribution area 300a and distribution area 300b) can be the same, the fourth distance H4 in different distribution areas (for example, distribution area 300a and distribution area 300b) can be the same, the fifth distance H5 in different distribution areas can be the same, and the sixth distance H6 in different distribution areas can be the same.

[0130] The above description uses distribution area 300a and distribution area 300b as examples to illustrate the configuration 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 other embodiments of the present application, the configuration of the above-mentioned distances in distribution area 300a and distribution area 300c, or in distribution area 300b and distribution area 300c, is the same as described above and will not be repeated here.

[0131] In addition, by arranging the data in Table 1, a bar graph as shown in Figure 18 can be obtained. It can be seen from Figure 18 that when the detection device 20 drives the above-mentioned first light source 201 and the 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 the 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 high 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 high proportion in the fat layer.

[0132] Among them, the detection signal obtained by the ultra-long-range (more than 10 mm) optical path has the highest proportion in the fat layer. As can be seen from the above, the subcutaneous tissue 104 where the fat layer is located is distributed with large arteries 1041 (as shown in Figure 6), and the pulsating components of the blood in the large arteries 1041 can generate the above-mentioned 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 that emits RD light and a second light-emitting device 2002 that emits IR light (as shown in Figure 15). When using an ultra-long-range (more than 10 mm) 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) light path, the medium-range (4mm~7mm) light path and the short-range (below 4mm) light path respectively, 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 the different physical constitutions 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 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 in a time-sharing manner to detect the user using the above-mentioned ultra-long-range (more than 10 mm) 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] Alternatively, in other embodiments of the present application, 0mm<H3<4mm. In this case, as shown in FIG17C , within 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 aforementioned near-range light path. Similarly, the effective depth of the near-range light path to the human skin may be the reticular dermis layer. In addition, 4mm≤H1≤7mm, and 4mm≤H6<7mm. Similarly, the above-mentioned first distance H1 and sixth distance H6 may be the same or different. In this case, within 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 aforementioned mid-range light path. Within the same distribution area 300, the light path formed between the second light source 202 and another first photoelectric converter 211 is the aforementioned mid-range light path. Similarly, the effective depth of the mid-range light path to the human skin may be the reticular dermis layer.

[0136] Furthermore, when 7mm < H4 ≤ 10mm and 7mm < H5 ≤ 10mm, as shown in FIG17C , 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 aforementioned long-range optical path. Furthermore, within the same distribution area 300, the optical path formed between the first light source 201 and another first photoelectric converter 211 is the aforementioned long-range optical path. When H2 > 10mm, 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 aforementioned ultra-long-range optical path. Similarly, the effective depth of the long-range and ultra-long-range optical paths reaching human skin can be the fat layer. The technical effects of the aforementioned distances are the same as those described above and will not be repeated here.

[0137] As can be seen from the above, the detection device 20 can have optical paths for four distance ranges, namely, a short-range optical path (less than 4mm), a medium-range optical path (4mm-7mm), a long-range optical path (7mm-10mm), and an ultra-long-range optical path (over 10mm). The PPG modules on the optical paths corresponding to different distance ranges can obtain PPG data with different PIs. In this way, the processor of the electronic device 01 can compare and analyze PPG data with different PIs based on 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. For example, as shown in Table 3, taking the detection device 20 detecting blood oxygen data as an example, when using the optical paths of the above four distance ranges, the proportion of abnormal data generated by interference from the above interference sources in the collected blood oxygen data is 0.17%, and the blood oxygen detection accuracy (rms) is 4.23, which is a high data detection accuracy. Among them, the smaller the value of the blood oxygen detection accuracy (rms), the higher the accuracy.

[0138] In comparison, when the detection device only has three distance ranges of optical paths, for example, a close range (less than 4mm) optical path, a medium range (4mm to 7mm) optical path, and a long range (7mm to 10mm) optical path, as shown in Table 3, the proportion of abnormal data in the collected blood oxygen data due to interference from the above-mentioned interference sources 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 distance ranges of optical paths, for example, a close range (less than 4mm) optical path, as shown in Table 3, the proportion of abnormal data in the collected blood oxygen data due to interference from the above-mentioned interference sources 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 that the detection device 20 has, the higher the accuracy of the health detection data obtained.

[0139] Table 3

[0140] 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, as shown in FIG19 , 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 with a second light source 202. Adjacent distribution areas 300a and 300b share the same first light source 201.

[0141] In other embodiments of the present application, as shown in Figure 20, 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 may further include three third light sources 203 (a cross-filled pattern gem is used in the figure). Among them, a third light source 203 is provided 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 to improve the detection accuracy. Among them, Figure 20 is an example of the detection device 20 including three second light sources 202. In other embodiments of the present application, the detection device 20 may further include two second light sources 202, and the corresponding detection device 20 has two distribution areas, and a second light source 202 is provided in each distribution area.

[0142] In other embodiments of the present application, the detection device 20 may include four first light sources 201 and four first photoelectric converters 211 as shown in FIG21 , with one first photoelectric converter 211 disposed between two adjacent first light sources 201. Furthermore, two first light sources 201, one first photoelectric converter 211, and one second light source 202 are distributed within a distribution area, such as 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 those described above and are not further elaborated herein.

[0143] For example, as shown in Figure 21, within the same distribution area 300a, a first distance H1 exists between the first light source 201 and the first photoelectric converter 211, and a second distance H2 exists 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, a third distance H3 exists between the second light source 202 and the first photoelectric converter 211. A fourth distance H4 exists between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300a. The configuration and technical effects of the first distance H1, second distance H2, third distance H3, and fourth distance H4 are the same as those described above and will not be further elaborated here.

[0144] In other embodiments of the present application, as shown in FIG22 , the detection device 20 may include four first light sources 201 and four first photoelectric converters 211, with one first photoelectric converter 211 disposed between two adjacent first light sources 201. Furthermore, the detection device 20 may further include four second photoelectric converters 221, with one second photoelectric converter 221 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.

[0145] 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-mentioned 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 the distribution area 300a. In this way, within the same distribution area, any one of the first light source 201 and the second light source 202 can not only form a light path with the first photoelectric converter 211, but also form a light path 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 by the same logic, and will not be repeated here.

[0146] In other embodiments of the present application, as shown in FIG23 , the detection device 20 may further include four second photoelectric converters 221, which are disposed within the detection region 200 (as shown in FIG9A ). Furthermore, the detection device 20 may include four first light sources 201, four first photoelectric converters 211, and two second light sources 202, with one first photoelectric converter 211 disposed between two adjacent first light sources 201. The detection device has two distribution regions, for example, distribution region 300a and distribution region 300b.

[0147] Among them, any distribution area, such as 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, within 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 by the same logic, and will not be repeated here.

[0148] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection 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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