A detection device, electronic equipment

Abstract

This application provides a detection device and electronic device, relating to the field of health data detection technology, to address the problem of low accuracy in health detection data due to the complex tissue structure of the user's test site. In this detection device, a first photoelectric converter is disposed between two adjacent first light sources, and a second light source is located within a detection area enclosed by multiple first light sources and multiple first photoelectric converters. Each first light source has a first distance H1 and a second distance H2 between itself and at least two of the first photoelectric converters. The second light source has a third distance H3 and a fourth distance H4 between itself and at least two of the first photoelectric converters. The first light sources, second light sources, and first photoelectric converters are distributed within the detection device's distribution area. Each light source and one photoelectric converter can constitute a PPG module; different distances between the light source and the photoelectric converter can result in different effective skin depths for detection.

Description

Technical Field

[0001] This application relates to the field of health data detection technology, and in particular to a detection device and electronic equipment. Background Technology

[0002] As people pay increasing attention to their health, users have higher demands for the functionality of electronic devices. Devices with human health sign detection functions can monitor users' health data, such as heart rate and blood oxygenation, allowing users to understand their physical condition at any time and play a role in disease prevention. Currently, fingertip pulse oximeters can be used to measure blood oxygenation in the fingers. However, this method restricts fingertip movement, causes a feeling of pressure, and makes real-time monitoring difficult. To address these issues, wearable devices can be used to measure blood oxygenation in other parts of the body, such as the wrist. However, the more complex tissue structure of the wrist compared to the fingertips leads to reduced accuracy in blood oxygenation measurement. Summary of the Invention

[0003] This application provides a detection device and electronic equipment to solve the problem that the complex tissue structure of the user's test site leads to low accuracy of health test data.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] One aspect of this application provides a detection device 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 at least three first photoelectric converters enclose a detection area. Furthermore, the second light sources are 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 distance H1, second distance H2, third distance H3, and fourth distance H4 are different. Based on this, the detection device has at least two distribution areas, within which the first light sources, second light sources, and first photoelectric converters are distributed. The first light sources used to enclose the detection area can be referred to as outer ring first light sources, and the second light sources located within the detection area can be referred to as inner ring light sources.

[0006] In summary, at least one first photoelectric converter is disposed between two adjacent first light sources, and at least three first light sources and at least three first photoelectric converters form a detection area. When the detection device comes into contact with the user's skin, the aforementioned detection area determines the range of the user's skin that the detection device can detect. Furthermore, at least two second light sources are disposed within the aforementioned detection area, and the detection device has at least two distribution areas, within which first light sources, second light sources, and first photoelectric converters are distributed. In this case, a light path can be formed between one first light source and one first photoelectric converter, allowing the first light source and first photoelectric converter in this light path to constitute a PPG module. Similarly, a light path can also be formed between one second light source and one first photoelectric converter, allowing the second light source and first photoelectric converter in this light path to constitute a PPG module. The aforementioned PPG module can detect the user's pulse data. Thus, by setting the aforementioned 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, allowing more PPG modules to detect the user's pulse data when the user's skin comes into contact with the detection area. This reduces the problem of interference with local detection data in the detection area, which could lead to a decrease in the accuracy of the detection data. Based on this, the distance between the light source and the photoelectric converter can determine the effective depth to which the light emitted by the light source reaches the skin (at which the proportion of PPG signal is relatively high). Therefore, within the same distribution area, there is a first distance H1 between the first light source and at least one first photoelectric converter. There is a second distance H2 between the first light source and at least one first photoelectric converter outside the distribution area. Within the same distribution area, there is a third distance H3 between the second light source and at least one first photoelectric converter. When there is a fourth distance H4 between the second light source and at least one first photoelectric converter outside the distribution area, the first light source can have a first distance H1 and a second distance H2 with at least two of the first photoelectric converters, and the second light source can have a third distance H3 and a fourth distance H4 with at least two of the first photoelectric converters. Any two of the above four distances are different, so the detection device can have light paths with at least four distances. The PPG module corresponding to each light path can acquire PPG data at one skin depth, thereby enabling the detection device to obtain PPG data at at least four depths. In this way, the electronic device can compare and analyze not only the PPG data obtained from different optical paths in the detection area, but also the PPG data with different PI, based on the detection results of the detection device, thus making the final output PPG data have high accuracy.

[0007] In one optional embodiment, 0mm < H1 < 4mm, within the same distribution area, the optical path formed between the first light source and the first photoelectric converter is a short-range (less than 4mm) optical path. 4mm ≤ H3 < 7mm, within the same distribution area, the optical path formed between the second light source and the first photoelectric converter is a medium-range (4mm to 7mm) optical path. 7mm ≤ H4 ≤ 10mm, the optical path formed between the second light source and at least one first photoelectric converter outside the distribution area is a long-range (7mm to 10mm) optical path. H2 > 10mm, the optical path formed between the first light source and at least one first photoelectric converter outside the distribution area is an ultra-long-range (more than 10mm) optical path. Alternatively, 0mm < H3 < 4mm, 4mm ≤ H1 < 7mm; 7mm ≤ H4 ≤ 10mm; H2 > 10mm. The above distance settings and technical effects are the same as described above and will not be repeated here.

[0008] In one optional implementation, 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. This way, within the same distribution area, not only can adjacent first light sources each form an optical path with the first photoelectric converter, but the second light source between the two first light sources can also form an optical path with the first photoelectric converter. This increases the number of optical paths between adjacent first light sources, resulting in a larger area covered by optical paths within the entire detection area. This leads to a greater number of PPGs obtained by the detection device from different optical paths, reducing the impact of interference caused by a high proportion of DC signals in local areas on the detection results and improving detection accuracy.

[0009] 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 adjacent first light sources, and two first photoelectric converters distributed within a distribution area. The technical effects of the first light sources and first photoelectric converters are the same as described above, and will not be repeated here.

[0010] In one optional embodiment, within the same distribution area, the first light source and the two first photoelectric converters are respectively separated by a first distance H1 and a fifth distance H5. 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 near-range optical path, and the optical path formed between the first light source and the other first photoelectric converter is the aforementioned mid-range optical path. Within the same distribution area, the second light source and the two first photoelectric converters are respectively separated by a third distance H3 and a sixth distance H6. 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 mid-range optical path. In this way, the detection device can obtain PPG data at six depths. The technical effects of obtaining PPG data at multiple depths are the same as described above and will not be repeated here.

[0011] In one optional implementation, 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. This ensures that the distribution of the first light source, the second light source, and the first photoelectric converter in the detection device is symmetrical, thereby improving the appearance quality of the electronic device.

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

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

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

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

[0016] In one optional embodiment, the detection device includes four first light sources, four first photoelectric converters, and two second light sources. A first photoelectric converter is disposed between two adjacent first light sources, and a first photoelectric converter is 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 aforementioned first light sources, first photoelectric converters, and distribution areas are the same as described above and will not be repeated here.

[0017] In one optional embodiment, the detection device includes four first light sources and four first photoelectric converters, with a first photoelectric converter spaced apart between two adjacent first light sources. The detection device also includes four second photoelectric converters, with a second photoelectric converter spaced between two adjacent first photoelectric converters. Two second photoelectric converters and one first photoelectric converter are distributed within a distribution area. Furthermore, the detection device has two distribution areas, each containing two second light sources, with one second light source located in one distribution area. In this way, within the same distribution area, any one of the first or second light sources can form an optical path not only with a first photoelectric converter but also with a second photoelectric converter, thereby increasing the number of optical paths. The arrangement of the distances between the light sources and each photoelectric converter is similar and will not be elaborated further here.

[0018] In one optional embodiment, the detection device further includes four second photoelectric converters disposed within the detection area. The detection device includes four first light sources and four first photoelectric converters, with a first photoelectric converter spaced apart between adjacent first light sources. Within the distribution area, there are two first photoelectric converters, a second photoelectric converter located between the two first photoelectric converters, a second light source, and a first light source, with the second photoelectric converter located between the first and second light sources. The detection device has two distribution areas, with one second light source located in one distribution area. The arrangement of the distances between the aforementioned light sources and each photoelectric converter is similar and will not be elaborated further here.

[0019] 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. The first light-emitting device emits red light, and the second light-emitting device emits infrared light. Red light is mainly absorbed by deoxyhemoglobin in the blood, while infrared light is mainly absorbed by oxyhemoglobin in the blood. Therefore, the processor in the aforementioned electronic device can utilize the absorption difference of 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.

[0020] In one optional embodiment, either the first light source or the second light source further includes a third light-emitting device that emits green light. Since human blood absorbs green light more readily, the heart rate data detected by the detection device can be more accurate when the first light-emitting device emits green light.

[0021] In one optional embodiment, the detection device further includes a light-transmitting cover plate, an optical film layer, an ink layer, and a light-shielding component. The light-transmitting cover plate covers the first light source, the first photoelectric converter, and the second light source. The light-transmitting cover plate can be made of a light-transmitting material with a light transmittance of 80% or more, such as glass, transparent resin, or sapphire. The optical film layer is disposed on the side of the light-transmitting cover plate facing the first light source. This optical film layer can transmit light emitted from the light source and light reflected or scattered by the skin, while also shielding components in the electronic device covered by the light-transmitting cover plate, preventing the user from clearly seeing the internal structure of the detection device. The ink layer is disposed between the optical film layer and the light-transmitting cover plate, and the ink layer has a first light-transmitting hole, a second light-transmitting hole, and a third light-transmitting hole. The first light-transmitting hole exposes the light-emitting surface of the first light source, the second light-transmitting hole exposes the light-emitting surface of the second light source, and the third light-transmitting hole exposes the light-receiving surface of the first photoelectric converter. The ink layer can shield the components of the detection device other than the first light source, the second light source, and the first photoelectric converter, while exposing 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, to facilitate the formation of the aforementioned light path. A light-shielding element is disposed on the side of the optical film layer facing away from the light-transmitting cover plate, and is located between any two of the first light source, the second light source, and the first photoelectric converter. This light-shielding element can prevent crosstalk between the first and second light sources, or prevent light emitted by the first light source (or the second light source) from being directly received by the first photoelectric converter without being absorbed and scattered by the skin.

[0022] One aspect of this application provides an electronic device comprising a circuit board and any of the detection devices described above, the detection device being disposed on the circuit board. The electronic device described above has the same technical effects as the detection device provided in the foregoing embodiments, and will not be repeated here. Attached Figure Description

[0023] Figure 1A This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0024] Figure 1B for Figure 1A A schematic diagram of the exploded structure of an electronic device in China;

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

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

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

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

[0029] Figure 4 This is a schematic diagram of the detection device provided in this embodiment;

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

[0031] Figure 5B for Figure 5A A schematic diagram illustrating the detection principle of a pulse oximeter;

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

[0033] Figure 7 This application provides a schematic diagram illustrating the principle of PPG wave generation.

[0034] Figure 8A This application provides a schematic diagram of PPG waves obtained from different parts of the human body in an embodiment of the present application.

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

[0036] Figure 9A This is a schematic diagram of the structure of a detection device provided in an embodiment of this application;

[0037] Figure 9B for Figure 9A A schematic diagram showing the division of a distribution area for the detection device;

[0038] Figure 9C for Figure 9A The diagram shows another distribution area of ​​the detection device.

[0039] Figure 10 This is a schematic diagram of another detection device provided in an embodiment of this application;

[0040] Figure 11A for Figure 9A A schematic diagram of an optical path for the detection device shown;

[0041] Figure 11B A schematic diagram of an optical path for a detection device provided in an embodiment of this application;

[0042] Figure 11C This is a schematic diagram of another optical path of the detection device provided in the embodiments of this application;

[0043] Figure 12 This is a schematic diagram of the detection principle of another detection device provided in an embodiment of this application;

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

[0045] Figure 14 This is a schematic diagram of the display state of an electronic device provided in an embodiment of this application;

[0046] Figure 15 for Figure 9A A schematic diagram of the structure of the first light source in the middle;

[0047] Figure 16 This is a schematic diagram of another detection device provided in an embodiment of this application;

[0048] Figure 17A for Figure 16 A schematic diagram showing the division of a distribution area for the detection device;

[0049] Figure 17B for Figure 16 A schematic diagram of an optical path for the detection device shown;

[0050] Figure 17C for Figure 16 A schematic diagram of various optical paths at different distances in the detection device shown;

[0051] Figure 17D for Figure 16 Another schematic diagram of the detection device with various optical paths at different distances;

[0052] Figure 18 This application provides a schematic diagram illustrating the signal percentage at different depths of the skin in an embodiment of the present application.

[0053] Figure 19 This is a schematic diagram of another detection device provided in an embodiment of this application;

[0054] Figure 20 This is a schematic diagram of another detection device provided in an embodiment of this application;

[0055] Figure 21 for Figure 20 A schematic diagram of various optical paths at different distances in the detection device shown;

[0056] Figure 22 This is a schematic diagram of another detection device provided in an embodiment of this application;

[0057] Figure 23 This is a schematic diagram of another detection device provided in an embodiment of this application.

[0058] Figure label:

[0059] 01-Electronic device; 10-Display screen; 11-Middle frame; 12-Back cover; 13-Circuit board; 20-Detection device; 100-Skin; 02-Pulse oximeter; 101-Strap layer; 102-Epidermal layer; 103-Dermal layer; 104-Subcutaneous tissue; 1021-Capillary; 1031-Arteriole; 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-Light-transmitting cover plate; 303-Light-shielding component; 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 Implementation

[0060] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

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

[0062] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed mechanical connection, a detachable mechanical connection, or an integral part; or, "connection" may be a direct connection or an indirect connection through an intermediate medium.

[0063] Furthermore, unless otherwise explicitly specified and limited, the term "electrical connection" should be interpreted broadly. For example, "electrical connection" can be a direct electrical connection, such as physical contact and electrical conduction between two components; it can also be understood as the electrical connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB), 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 a non-contact manner, such as an electrical connection between two components using capacitive coupling to transmit electrical signals.

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

[0065] This application provides an electronic device that can be applied to various communication systems or protocols, such as Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, Global System for Mobile Communication (GSM) communication technology, Wireless Fidelity (WiFi) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE), 5G communication technology, and other future communication technologies.

[0066] The electronic devices in this application embodiment can be smart wearable devices, such as human health monitoring wearable devices capable of detecting a user's health vital signs (e.g., heart rate, blood oxygen, blood pressure, sleep, etc.). Examples of such smart wearable devices include smartwatches, smart bracelets, smart glasses, smart helmets, and smart headphones. Alternatively, the electronic devices can also be mobile phones, tablets, laptops, smart home devices, virtual reality (VR) electronic devices, augmented reality (AR) electronic devices, etc. Furthermore, the electronic devices can also be handheld devices with wireless communication capabilities, computing devices, other processing devices connected to a wireless modem, in-vehicle devices, electronic devices in 5G networks, or electronic devices in future evolved public land mobile networks (PLMNs), etc. This application embodiment is not limited to these categories.

[0067] For ease of explanation, the following is based on... Figure 1A The electronic device 01 shown is an example of a smartwatch capable of performing health checks. For instance, the electronic device 01 may include a display screen 10, a frame 11, and other components. Figure 1B The rear cover 12 is shown. Continuing as... Figure 1B As shown, the display screen 10 can be disposed within the middle frame 11, with the display surface of the display screen 10 located on the side opposite to the rear shell 12. The middle frame 11 can be disposed around the circumference of the display screen 10. The aforementioned display screen 10 can be a liquid crystal display (LCD), an organic light emitting diode (OLED) display, or a micro (or mini) light emitting diode (LED) display. This application does not limit the shape of the display screen 10; for example, the display surface of the display screen 10 can be circular or rectangular. The outline shapes of the aforementioned middle frame 11 and rear shell 12 can match the outline shape of the display screen 10. For ease of explanation, the following description uses a circular outline shape for the display screen 10, middle frame 11, and rear shell 12 as an example.

[0068] Based on this, the aforementioned electronic device 01 may also include a circuit board 13 (such as... Figure 1BThe circuit board, battery, processor, sensor, microphone, and speaker are among the components shown. In some embodiments of this application, these components may be disposed between the display screen 10 and the rear cover 12. The aforementioned mid-frame 11 provides support for the entire electronic device 01.

[0069] For example, the processor described above may include one or more processing units, such as: 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. The different processing units may be independent devices or integrated into one or more processors.

[0070] In addition, in order to detect health parameters such as heart rate and blood oxygen saturation, the aforementioned electronic device 01 may also include, for example, Figure 1B The detection device 20 is shown. This detection device 20 can be located within the receiving space enclosed by the display screen 10, the middle frame 11, and the rear cover 12. The detection device 20 can be mounted on the circuit board 13 and electrically connected to the circuit board 13. Based on this, as... Figure 2A (along Figure 1A As shown in the top view obtained from direction A in the figure, the rear shell 12 can expose a part of the detection device 20. Figure 2A This explanation uses a smartwatch as an example, where electronic device 01 is... Figure 2B (along Figure 1A The wristband shown in the top view obtained from direction A) or Figure 2C (along Figure 1A When the mobile phone is shown in the top view obtained from direction A, a part of the detection device 20 can also be exposed on the back cover 12 of the electronic device 01.

[0071] in, Figure 2A , Figure 2B as well as Figure 2CThis is merely an illustrative example of the back cover 12 exposing a portion of the detection device 20, and does not constitute a limitation on the shape design of the back cover 12 or the structure of the detection device 20. In other embodiments of this application, the aforementioned electronic device 01 can also be an earphone or a head-mounted device. When the detection device 20 performs health checks on a user, the back cover 12 of the electronic device 01 can come into contact with the user's skin. For ease of explanation, the following description uses the electronic device 01 as an example. Figure 2A The example shown is a smartwatch.

[0072] Based on this, if the aforementioned electronic device 01 is a smartwatch, such as Figure 3 As shown, the user can wear electronic device 01 on their left (or right) hand, and the back cover 12 of electronic device 01 (as shown) Figure 2A As shown, the device 20 can contact the user's wrist, allowing it to acquire the user's blood oxygen and heart rate data. For example, the aforementioned detection device 20 may include, for instance, […]. Figure 4 At least one photoplethysmograph (PPG) module is shown.

[0073] The specific working principle of the PPG module can be summarized as follows: Human blood circulation is driven by the contraction and relaxation of the beating heart. When the heart contracts, blood flows to the periphery of the body, causing congestion and an increase in blood volume at the measurement site. When the heart relaxes, the blood at the measurement site returns to the heart, causing a decrease in blood volume. This generates a periodic signal, also known as an alternating current (AC) signal. This AC signal can contain a systolic phase peak and a diastolic phase peak, and the heart rate (HR) can be determined from this AC signal. Furthermore, the oxygen content in the blood is related to the hemoglobin content.

[0074] Based on this, such as Figure 4 The PPG module shown may include a light source, such as an LED and a photodetector (PD). The LED and PD are positioned on the same side of the user's skin 100, and this PPG module is a reflective PPG module. Human skin 100 absorbs and scatters visible light and infrared light. Figure 4When the light emitted by the LED is irradiated onto the skin 100, the blood flow within the skin 100 (e.g., changes in blood flow caused by heartbeat) and the amount of hemoglobin in the blood affect the amount of light absorbed, which in turn affects the scattering of light by the skin 100. By acquiring the light scattered by the skin 100 using a photodiode (PD), the pattern of light intensity changes over time related to blood volume in the human body can be detected, i.e., photoplethysmography. Photoplethysmography can reflect the characteristics of blood flow and the content of hemoglobin, thereby allowing the acquisition of data such as heart rate and blood oxygenation.

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

[0076] In related technologies, such as Figure 5A As shown, users can insert their fingers into the finger clip pulse oximeter 02 to detect the user's fingertips and obtain blood oxygen and heart rate data. In this case, as... Figure 5B As shown, the LEDs and PDs in the PPG module can be respectively positioned on both sides of the user's skin 100, and this PPG module is a transmissive PPG module. However, the detection method using a fingertip pulse oximeter 02 would prevent the user's fingertips from moving normally and would cause a squeezing sensation, while also making real-time detection difficult. Therefore, the electronic device 01 provided in this embodiment of the application adopts the following... Figure 4 The reflective PPG module shown is illustrated using the example of the detection device 20 in electronic device 01 testing the user's wrist.

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

[0078] In this case, the data obtained by the PPG module, such as Figure 7 As shown, the part capable of generating the aforementioned AC signal is the aorta 1041 (e.g., Figure 6 (As shown) Pulsatile component of artery blood ①. When the pulsatile component of arterial blood ① is at peak position a1, the aorta 1041 (as shown) Figure 6 The arterial blood has the highest blood volume (as shown), therefore the absorption rate of the light emitted by the LED in the PPG module is the highest. At this time, the PD in the PPG receives the least light signal, corresponding to the trough position a2 of the AC signal. Furthermore, when the pulsating component ① of the arterial blood is at the trough position b1, the aorta 1041 (as shown) has the highest blood volume. Figure 6 The blood volume in the PPG module is the smallest, therefore the absorption rate of the light emitted by the LED in the PPG module is the lowest. At this time, the PD in the PPG receives the most light signal, corresponding to the peak position b2 of the AC signal. The waveform of this AC signal changes periodically over time.

[0079] also, Figure 7 The absorption rate of the non-pulsatile component of artery blood②, venous blood③, and other tissues④ (e.g., human bones, muscles, pigments, and hair) to the light emitted by the LED in the PPG module remains essentially unchanged. Therefore, the light received by the PD in the PPG from the above three parts ( Figure 7 The optical signals in (②, ③, and ④) remain essentially unchanged. Therefore, the PPG detection result includes not only the AC signal but also the three components mentioned above. Figure 7 The direct current (DC) signal generated by ②, ③, and ④ in the diagram. The magnitude of this DC signal does not change over time.

[0080] Based on this, such as Figure 8AAs shown, the blood vessel density in the human wrist is lower than that in the fingertips, and the human structure in the wrist is more complex than that in the fingertips. For example, the wrist includes not only skin but also bones, muscles, pigments, and hair—all components capable of generating DC signals. Therefore, the amplitude (or signal strength) of the AC signal component AC1 detected by the PPG module in the wrist will be less than the amplitude (or signal strength) of the AC signal component AC2 detected by the PPG module in the fingertips.

[0081] The detection accuracy of the detection device 20 with the aforementioned PPG module is affected by the perfusion index (PI). A higher PI indicates higher detection accuracy, and vice versa. PI can be the ratio of the AC signal to the DC signal. Therefore, from... Figure 8A It can be seen that the PI value of the detection device 20 for the wrist portion is smaller than the PI value of the detection device 20 for the fingertip portion. Furthermore, as... Figure 8B As shown, the part of the user skin 100 used to generate 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 noises, such as noise caused by electronic circuit interference and device state shifts. Specifically, the light emitted by the LED, after entering the skin, forms... Figure 8B The "banana-shaped" optical path shown allows light to be received by the PD, enabling the PPG module to detect data such as the user's blood oxygen and heart rate.

[0082] Based on this, in order to improve the detection accuracy and signal-to-noise ratio of the detection device 20, the detection device 20 provided in this application embodiment is as follows: Figure 9A The diagram may include at least three first light sources 201, at least three first photoelectric converters 211, and at least two second light sources 202. Figure 9A The description is based on an example of a detection device comprising three first light sources 201, three first photoelectric converters 211, and three second light sources 202.

[0083] Based on this, continue as follows Figure 9AAs shown, at least one first photoelectric converter 211 is disposed between two adjacent first light sources 201. All the first light sources 201 (i.e., the aforementioned at least three first light sources 201) and all the 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 the second light sources 202 (i.e., at least two second light sources 202) of the detection device 20 can be disposed within the detection area 200. Among them, the first light sources 201 used to enclose the detection area 200 can be referred to as the outer ring first light sources, and the second light sources 202 located within the detection area 200 can be referred to as the inner ring light sources.

[0084] The detection area 200 refers to the area of ​​skin covered by the detection area 200 when the user puts the electronic device 01 into contact with the skin, for example, when the user wears the electronic device 01 on their wrist and the back shell 12 of the electronic device 01 is in contact with the skin of the user's wrist. This area can be the area of ​​the user's skin that the detection device 20 in the electronic device 01 can detect.

[0085] For ease of explanation, the first light source 201 is represented by an unfilled circle, the second light source 202 by a circle filled with diagonal lines, and the first photoelectric converter 211 by an unfilled square. The shapes of the components in the accompanying drawings do not constitute a limitation on the actual external shape of the components.

[0086] Based on this, such as Figure 9B As shown, the detection device 20 can have a distribution area 300 ( Figure 9B The area 300 is defined by the intersection of a dashed line and the edge of the detection device 20. Within this area 300 are distributed a first light source 201, a second light source 202, and a first photoelectric converter 211. For example... Figure 9B The distribution area 300 shown can contain two first light sources 201, one second light source 202, and one first photoelectric converter 211.

[0087] Figure 9B This example illustrates the concept of a detection device 20 having three second light sources 202. Based on this, as follows... Figure 9CAs shown, the detection device 20 may include three distribution areas: a first distribution area 300a, a first distribution area 300b, and a first distribution area 300c. Each of the first distribution areas 300a, 300b, and 300c may contain a second light source 202. The detection device 20 may include three first light sources (e.g., first light source 201a, first light source 201b, and first light source 201c), three second light sources (e.g., second light source 202a, second light source 202b, and second light source 202c), and three first photoelectric converters (e.g., first photoelectric converter 211a, first photoelectric converter 211b, and first photoelectric converter 211c).

[0088] Furthermore, any one of the first distribution areas 300a, 300b, and 300c has two first light sources and one first photoelectric converter. Adjacent distribution areas can share the same first light source 201. For example, first distribution areas 300a and 300b share a first light source 201a, first distribution areas 300b and 300c share a first light source 201b, and first distribution areas 300c and 300a share a first light source 201c.

[0089] In this case, within the same distribution area (e.g., distribution area 300a), when a first photoelectric converter 211a is disposed between two adjacent first light sources, such as first light source 201a and first light source 201c, by disposing a second light source 202a between the two adjacent first light sources, the second light source 202a can be distributed near the location of the first photoelectric converter 211a. In this way, within the same distribution area, not only can the first light source 201a and first light source 201c each form an optical path with the first photoelectric converter 211a, but the second light source 202a can also form an optical path with the first photoelectric converter 211a between the first light source 201a and first light source 201c. This increases the number of optical paths between two adjacent first light sources (e.g., first light source 201a and first light source 201c), thus increasing the overall detection area 200 (e.g., distribution area 300a). Figure 9A As shown, the area covered by the optical path is larger, and the detection device 20 obtains more PPGs from different optical paths. This can reduce the impact of interference caused by the large proportion of DC signals in local areas on the detection results and help improve detection accuracy.

[0090] The above is based on Figure 9C The detection device 20 shown is illustrated using an example having three second light sources 202. In other embodiments of this application, such as... Figure 10As shown, the detection device 20 can have two second light sources 202. In this case, the detection device 20 can have two distribution areas, namely a first distribution area 300a and a first distribution area 300b, each of which is provided with a second light source 202. Furthermore, as described above, two adjacent distribution areas (e.g., the first distribution area 300a and the second distribution area 300b) share the same first light source 201.

[0091] The above is an example illustrating the number of distribution areas 300 based on the different numbers of the second light source 202. It does not constitute a limitation on the number of the second light source 202 or the distribution areas 300, as long as the distribution area 300 contains the first light source 201, the second light source 202, and the first photoelectric converter 211. The following explanation uses... Figure 9C The following example illustrates the use of three secondary light sources.

[0092] In this case, such as Figure 11A As shown, in this detection device 20, an optical path can be formed between a first light source 201 and a first photoelectric converter 211. Figure 11A (Solid arrows are used to represent arrows). For example, such as... Figure 11B As shown, the light emitted by the first light source 201 is incident on the skin 100. After absorption and scattering by the skin 100, some of the scattered light can be incident on the first photoelectric converter 211, thereby forming an optical path ①. In this way, the first light source 201 and the first photoelectric converter 211 forming the above-mentioned optical path ① can constitute a PPG module, which can detect the user's pulse data.

[0093] Among them, such as Figure 11B As shown, the detection device 20 may further include an optical film layer 301, a light-transmitting cover plate 302, a light-shielding element 303, and an ink layer 304. The light-transmitting cover plate 302 can serve as... Figure 1B At least a portion of the rear shell 12 of the device 20 is covered by a light-transmitting cover 302, which can cover the first light source 201, the first photoelectric converter 211, and the second light source 202. The light-transmitting cover 302 can be made of a light-transmitting material with a light transmittance of 80% or more, such as glass, transparent resin, or sapphire. Furthermore, an optical film layer 301 can be disposed on the side of the light-transmitting cover 302 facing the first light source 201. The optical film layer 301 can be a Fresnel film layer, which allows light emitted from the light source and light reflected or scattered by the skin to pass through, while also shielding components in the electronic device 01 covered by the light-transmitting cover 302, preventing the user from clearly seeing the internal structure of the detection device 20.

[0094] In addition, continue as Figure 11B As shown, the ink layer 304 can be disposed between the optical film layer 301 and the light-transmitting 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 exposes the light-emitting surface of the first light source 201, the second light-transmitting hole 3042 exposes the light-emitting surface of the second light source 202, and the third light-transmitting hole 3043 exposes the light-receiving surface of the first photoelectric converter 211. In this way, the ink layer 304 can shield the other components in the detection device 20 except for the first light source 201, the second light source 202, and the first photoelectric converter 211, while the first light-transmitting hole 3041, the second light-transmitting hole 3042, and the third light-transmitting hole 3043 respectively expose the first light source 201, the second light source 202, and the first photoelectric converter 211, thereby forming the aforementioned light path ① and light path ②.

[0095] Based on this, to prevent crosstalk between the first light source 201 and the second light source 202, or to prevent 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 light-transmitting cover plate 302, and may be located between any two of the first light source 201, the second light source 202, and the first photoelectric converter 211, thereby serving to block light. The light-shielding member 303 and the optical film layer 301, and the optical film layer 301 and the ink layer 304, may be bonded using a transparent adhesive layer (represented by a diagonally filled pattern in the figure).

[0096] Similarly, continue as follows Figure 11A As shown, an optical path can also be formed between a second light source 202 and a first photoelectric converter 211. Figure 11A (Used as dashed arrows in the text), for example, such as... Figure 11B As shown, the light emitted by the second light source 202 is incident on the skin 100. After absorption and scattering 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-mentioned light path ② can constitute a PPG module.

[0097] Based on this, since the distribution area 300 of the detection setting 20 provided in this application embodiment (e.g., Figure 9B The detection device 20 (as shown) is equipped with a first light source 201, a second light source 202, and a first photoelectric converter 211. Furthermore, the detection device 20 can have at least two distribution areas, thus increasing the detection area 200 of the detection device 20 (e.g., ...). Figure 9AAs shown, the number of optical paths and the number of PPG modules corresponding to each optical path enable the detection area 200 covering the user's skin to obtain detection results of the user's pulse data from different PPG modules. In this case, when a portion of the detection area 200 is affected... Figure 8B When interference sources or noise generated by electronic devices are present, the processor of 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 based on the detection results of detection device 20, so as to improve the accuracy of detection data and signal-to-noise ratio.

[0098] Furthermore, when the spacing between the LED and the PD varies, the effective depth to which the light emitted by the LED reaches the skin (at which the proportion of PPG signal is higher in each layer of the skin) also varies. For example, Figure 11B As shown, the distance between the second light source 202 and the first photoelectric converter 211 is relatively short. Therefore, the depth to which the light rays in light path ① (from the first light source 201) reach the skin 100 can be greater than the depth to which the light rays in light path ② (from the second light source 202) reach the skin 100. Alternatively, as another example, such as... Figure 11C As shown, the distances between the first light source 201 and the second light source 202 and the first photoelectric converter 211 are the same or approximately the same. Therefore, the depth to which the light rays in the light path ① (from the first light source 201) reach the skin 100 can be the same or approximately the same as the depth to which the light rays in the light path ② (from the second light source 202) reach the skin 100.

[0099] In this case, as can be seen from the above, the part of skin 100 used to generate DC signals will act as such Figure 12 The interference source shown interferes with the signal detected by the PPG module. Furthermore, it can generate... Figure 7 The aorta 1041 shown in the AC signal is located in Figure 6 The subcutaneous tissue 104 shown is 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 AC signal in the obtained detection signal, the higher the PI of the detection result, and the higher the detection accuracy. Figure 12 In the process, since the depth to which the light rays in optical path ① (from the first light source 201) reach the skin 100 is greater than the depth to which the light rays in optical path ② (from the second light source 202) reach the skin 100, the PI of the detection signal obtained by the first photoelectric converter 211 in the PPG module corresponding to optical path ① is greater than the PI of the detection signal obtained by the first photoelectric converter 211 in the PPG module corresponding to optical path ②.

[0100] As mentioned above, different depths of light reaching the skin in the optical path result in different points of intensity (PI) in the detection results. Therefore, in order 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, such as... Figure 13 As shown, within the same distribution area 300, there is a first distance H1 between the first light source 201 and at least one first photoelectric converter 211. For example, when there are two or more first photoelectric converters 211 within the distribution area 300, the first light source 201 may have a first distance H1 with one of the first photoelectric converters 211 within the same distribution area 300, and the distance between the first light source 201 and the remaining first photoelectric converters 211 may be the same as or different from the first distance H1 mentioned above.

[0101] In addition, continue as Figure 13 As shown, there is a second distance H2 between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300. For example, when there are two or more first photoelectric converters 211 outside the distribution area 300, there is a second distance H2 between the first light source 201 and one of the first photoelectric converters 211 outside the distribution area 300. The distance 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 described above.

[0102] For example, such as Figure 13 As shown, within the same distribution area 300, there is a first distance H1 between the first light source 201 and the first photoelectric converter 211. There is a second distance H2 between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300, where H1 < H2. For example, if 0 mm < H1 < 4 mm, the optical path formed between the first light source 201 and the first photoelectric converter 211 within the same distribution area 300 can be a short-range (less than 4 mm) optical path. Alternatively, if 4 mm ≤ H1 < 7 mm, the optical path formed between the first light source 201 and the first photoelectric converter 211 within the same distribution area 300 can be a medium-range (4 mm to 7 mm) optical path. Furthermore, if H2 > 10 mm, the optical path formed between the first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 is an ultra-long-range (more than 10 mm) optical path.

[0103] In addition, continue as Figure 13As shown, within the same distribution area 300, the second light source 202 has a third distance H3 between it 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 second light source 202 may have a third distance H3 between it and one of the first photoelectric converters 211 within the same distribution area 300. The distance between the second light source 202 and the remaining first photoelectric converters 211 may be the same as or different from the aforementioned third distance H3.

[0104] Furthermore, a fourth distance H4 exists 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, a fourth distance H4 exists 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 can be the same as or different from the aforementioned fourth distance H4. Specifically, any two of the first distance H1, second distance H2, third distance H3, and fourth distance H4 are different.

[0105] For example, such as Figure 13 As shown, within the same distribution area 300, there is a third distance H3 between the second light source 202 and the first photoelectric converter 211. There is a fourth distance H4 between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300, where H3 < H4 < H2. For example, when 0 mm < H1 < 4 mm, 4 mm ≤ H3 < 7 mm. In this case, within the same distribution area 300, the optical path formed between the first light source 201 and the first photoelectric converter 211 is a short-range (less than 4 mm) optical path. Within the same distribution area 300, the optical path formed between the second light source 202 and the first photoelectric converter 211 can be a medium-range (4 mm to 7 mm) optical path. Alternatively, when 4mm ≤ H1 < 7mm and 0mm < H3 < 4mm, in this case, within the same distribution area 300, if the optical path formed between the first light source 201 and the first photoelectric converter 211 is a mid-range (4mm to 7mm) optical path, then within the same distribution area 300, the optical path formed between the second light source 202 and the first photoelectric converter 211 can be a short-range (less than 4mm) optical path. Furthermore, when 7mm ≤ H4 ≤ 10mm, in this case, the optical path formed between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 can be a long-range (7mm to 10mm) optical path.

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

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

[0108] Among them, such as Figure 13 As shown, the same first photoelectric converter 211 can receive light from different first light sources 201 or different second light sources 202. In order for the processor of the electronic device 01 to distinguish PPG data from different optical paths, the detection device 20 described above allows for time-division 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 lit in a time-division manner. This application does not limit the method of time-division driving different light sources.

[0109] As described above, the processor of electronic device 01 can, based on the detection results of detection device 20, not only compare and analyze PPG data obtained from different optical paths in detection area 200, but also compare and analyze PPG data with different PI values, thereby deriving the final PPG data as the detection result for output. For example, when electronic device 01 with the aforementioned detection device 20 has a display function, such as... Figure 14 As shown, the electronic device 01 can display the aforementioned PPG data, such as blood oxygen and heart rate, so that users can obtain health test results in a timely manner.

[0110] In order to obtain the aforementioned blood oxygen data, in some embodiments of this application, either the first light source 201 or the second light source 202 may include... Figure 15The first light-emitting device 2001 and the second light-emitting device 2002 shown are configured such that the first light-emitting device 2001 emits red light (RD) with a wavelength of 660-735 nm, and the second light-emitting device 2002 emits infrared light (IR) with a wavelength of 805-940 nm. Red light is primarily absorbed by deoxyhemoglobin in the blood, while infrared light is primarily absorbed by oxyhemoglobin in the blood. Therefore, the processor in the aforementioned electronic device 01 can utilize the absorption difference between red and infrared light detected by the detection device 20 to calculate blood oxygen saturation by measuring the ratio of deoxyhemoglobin to oxyhemoglobin in the blood, thereby obtaining blood oxygen data.

[0111] Furthermore, as can be seen from the above, according to Figure 7 The trough a2 position (corresponding to the systolic peak) and peak b2 position (corresponding to the diastolic peak) in the AC signal shown can be used to determine the user's heart rate. The aforementioned AC signal is related to the absorption and scattering of light emitted by the light source of the detection device 20 by the human body. Since human blood has a stronger absorption rate of green light, in order to make the heart rate data detected by the detection device 20 more accurate, such as... Figure 15 As shown, 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 to obtain heart rate data. However, either the first light source 201 or the second light source 202 can be replaced by a third light-emitting device 2003, which emits green light.

[0112] in, Figure 15 This example illustrates the concept of a first light source 201 comprising 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 aforementioned first light-emitting device 2001, second light-emitting device 2002, and third light-emitting device 2003. Furthermore, Figure 15 This application is merely an example illustrating the placement of the first light-emitting device 2001, the second light-emitting device 2002, and the third light-emitting device 2003, and does not limit the placement of the aforementioned light-emitting devices.

[0113] Furthermore, the above example illustrates the detection of a user's blood oxygen and heart rate using the detection device 20. In other embodiments of this application, the processor of the electronic device 01 can also derive data such as the user's blood pressure, sleep, hemoglobin concentration, pulse, blood oxygen saturation, respiratory rate, perfusion index, blood flow reactivity, methemoglobin, carboxyhemoglobin, bilirubin, and oxygen content based on the blood oxygen and heart rate data detected by the detection device 20.

[0114] The following description, based on the number and location of the first light source 201, the second light source 202, and the first photoelectric converter 211 within the distribution area, as well as the total number of light sources and photoelectric converters in the entire detection device 20, illustrates the structure of the detection device 20. In other embodiments of this application, such as... Figure 16 As shown, 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.

[0115] Furthermore, within the distribution area 300, there are two first light sources 201, 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 optical paths with each of the two first photoelectric converters 211, and between the two first light sources 201, the second light source 202 can form two optical paths with each of the first photoelectric converters 211, thereby increasing the number of optical paths between adjacent first light sources 201.

[0116] Based on this, such as Figure 17A As shown, the detection device 20 can have three distribution areas: distribution area 300a, distribution area 300b, and distribution area 300c. Each distribution area contains a second light source; for example, distribution area 300a contains a second light source 202a, distribution area 300b contains a second light source 202b, and distribution area 300c contains a second light source 202c. Furthermore, in the detection device 20, adjacent distribution areas share the same first light source; for example, distribution areas 300a and 300b share a first light source 201a. Distribution areas 300b and 300c share a first light source 201c, and distribution areas 300c and 300a share a first light source 201b.

[0117] In this case, such as Figure 17B As shown, in this detection device 20, an optical path can be formed between a first light source 201 and a first photoelectric converter 211. Figure 17B (Solid arrows are used to indicate this in the image). The first light source 201 and the first photoelectric converter 211, which form the aforementioned optical path, can constitute a PPG module. Furthermore, an optical path can also be formed between a second light source 202 and a first photoelectric converter 211. Figure 17B (The dashed arrows are used to indicate this in the image). The second light source 202 and the first photoelectric converter 211 in the above optical path can constitute a PPG module.

[0118] In this way, when multiple first light sources 201 and multiple second light sources 202 are driven in a time-sharing manner, such as Figure 17B As shown, each light source (first light source 201 or second light source 202) can form an optical path (indicated by arrows) with a first photoelectric converter 211. Because the multiple light sources and multiple first photoelectric converters 211 are distributed in different positions, the multiple optical paths formed are located in the detection area 200 (e.g., ...). Figure 9A The intersecting structures within the optical paths (as shown) increase the density of the optical paths, resulting in a larger area of ​​the detection area 200 covered by the optical paths. This allows the detection device 20 to obtain more PPGs from different optical paths, reducing the impact of interference caused by a large proportion of DC signals in local areas on the detection results and improving detection accuracy.

[0119] As described above, different depths of light reaching the skin in the optical path result in different points of intensity (PI) in the detection results. Therefore, in order 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, for example, ... Figure 17C As shown, within the same distribution area 300, the first light source 201 and the two first photoelectric converters 211 are respectively separated by a first distance H1 and a fifth distance H5, which may be different. The first light source 201 and at least one first photoelectric converter 211 outside the distribution area 300 are separated by a second distance H2. Wherein, H1 < H5 < H2. Furthermore, within the same distribution area 300, the second light source 202 and the two first photoelectric converters 211 are respectively separated by a third distance H3 and a sixth distance H6. The second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 are separated by a fourth distance H4. Wherein, H3 < H4, H6 < H4.

[0120] In some embodiments of this application, 0mm < H1 < 4mm, such as... Figure 17C As shown, within the same distribution area 300, the optical path formed between the first light source 201 and one of the first photoelectric converters 211 is the aforementioned near-range optical path. For example, when H1 = 3.2 mm, the aforementioned near-range optical path, as shown in Table 1, can reach skin depths including the papillary dermis (signal percentage 0.21%), upper vascular plexus (signal percentage 1.29%), reticular dermis (signal percentage 41.04%), and lower vascular plexus (signal percentage 24.29%) in the dermis, as well as the fat layer in the subcutaneous tissue (signal percentage 33.16%).

[0121] As described above, the light emitted by the light source in the PPG module, after entering the skin's tissue layers at different depths (including the stratum corneum, epidermis, papillary dermis, upper vascular plexus, reticular dermis, lower vascular plexus, and fat layer), undergoes absorption and scattering by each tissue layer. Then, the PD in the PPG module can receive the light scattered from these tissue layers to generate the aforementioned detection signal. The signal percentage of a single tissue layer (e.g., the reticular dermis) refers to the proportion of the detection signal formed by the scattered light from that tissue layer (e.g., the reticular dermis) received by the PD when the light emitted by the light source in the PPG module penetrates that tissue layer (e.g., the reticular dermis) to the total number of detection signals received by the PD from all tissue layers of the skin. Therefore, the depth of the tissue layer (e.g., the reticular dermis) corresponding to the aforementioned signal percentage is the depth to which the light penetrates the skin.

[0122] Therefore, a higher signal percentage indicates the depth to which most 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 has the highest signal percentage (41.04%) in the reticular dermis. Therefore, the effective depth of the light path with the aforementioned first distance H1 in the near-range range can reach the reticular dermis.

[0123] Furthermore, given the conditions 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 they are within the range of 4mm to 7mm. Figure 17C As shown, within the same distribution area 300, the optical path formed between the second light source 202 and any one of the first photoelectric converters 211 is the aforementioned mid-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 also the aforementioned mid-range optical path.

[0124] For example, when H3, H5, or H6 is 5.5 mm, as shown in Table 1, the skin depths achievable by the aforementioned mid-range optical pathways include the papillary dermis (0.58% signal percentage), upper vascular plexus (1.16% signal percentage), reticular dermis (23.58% signal percentage), and lower vascular plexus (16.22% signal percentage) within the dermis, as well as the subcutaneous fat layer (58.46% signal percentage). Therefore, the PPG modules corresponding to the third distance H3, fifth distance H5, or sixth distance H6 achieve the highest signal percentage (58.46%) in the reticular dermis. Consequently, the effective depth of the mid-range optical pathways with the aforementioned third distance H3, fifth distance H5, or sixth distance H6 reaching the human skin can be the reticular dermis.

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

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

[0127] Table 1

[0128]

[0129] Based on this, in order to ensure the symmetrical distribution of the first light source 201, the second light source 202, and the first photoelectric converter 211 in the detection device 20, thereby improving the appearance quality of the electronic device 01, such as... Figure 17D As shown, the first distance H1 in different distribution areas (e.g., distribution area 300a and distribution area 300b) can be the same, the second distance H2 in different distribution areas (e.g., distribution area 300a and distribution area 300b) can be the same, the third distance H3 in different distribution areas (e.g., distribution area 300a and distribution area 300b) can be the same, the fourth distance H4 in different distribution areas (e.g., 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 is an example illustrating the setting of the first distance H1, the second distance H2, the third distance H3, the fourth distance H4, the fifth distance H5, and the sixth distance H6 using distribution regions 300a and 300b. In other embodiments of this application, the setting of the above distances in distribution regions 300a and 300c, or distribution regions 300b and 300c, is the same as described above, and will not be repeated here.

[0131] Furthermore, by organizing the data in Table 1, we can conclude that... Figure 18 The bar chart shown. Figure 18 It can be seen that when the detection device drives the first light source 201 and the second light source 202 for 20 minutes, the detection signals obtained by the optical pathways at various distance ranges account for almost no proportion in the stratum corneum and epidermis, and have a small proportion, approximately 1.00%, in the papillary dermis and upper vascular plexus. Furthermore, the detection signals obtained by the far-range (7mm–10mm) and mid-range (4mm–7mm) optical pathways account for a higher proportion in the lower vascular plexus and reticular dermis. The detection signals obtained by the far-range (7mm–10mm) and ultra-far-range (above 10mm) optical pathways account for a higher proportion in the adipose layer.

[0132] Among them, the detection signal obtained by the ultra-long-range (above 10mm) optical pathway accounted for the highest proportion in the fat layer. As mentioned above, large arteries 1041 (such as...) are distributed within the subcutaneous tissue 104 where the fat layer is located. Figure 6 As shown), the pulsating components of blood in the aorta 1041 can generate the aforementioned AC signal, thereby enabling the signal obtained by the detection device 20 to have a higher perfusion rate. For example, when the detection device 20 detects blood oxygen, the light-emitting devices in the light source of the detection device 20 include a first light-emitting device 2001 emitting RD light and a second light-emitting device 2002 emitting IR light (as shown). Figure 15 (As shown in Table 2). When using an ultra-long-range (10mm or more) optical path, the red light perfusion rate PI_RD obtained by the detection device 20 can reach 0.24%, and the infrared light perfusion rate PI_RD obtained by the detection device 20 can reach 0.36%. Furthermore, as shown in Table 2, when using long-range (7mm to 10mm), mid-range (4mm to 7mm), and short-range (less than 4mm) optical paths respectively, the perfusion rates of the red light perfusion rate PI_RD and infrared light perfusion rate PI_RD obtained by the detection device 20 decrease sequentially.

[0133] Therefore, when conducting health checks on different users, due to differences in individual physical conditions, under the same testing conditions (such as testing temperature or the distance of the light path), some users will have lower data perfusion rates. These users can be referred to as low-perfusion-rate groups (e.g., the elderly, women, or people with a thin physique). Furthermore, the blood flow in the human body is related to ambient temperature; when the ambient temperature is high, the perfusion rate of the obtained test data will also decrease. To solve the above problems, when using the detection device 20 provided in this application embodiment, the first light source 201 and the second light source 202 can be driven in a time-division manner to use the ultra-long-range (10mm or more) light path to detect users, so that the light emitted by the light source can reach more of the fat layer, thereby obtaining test data with a higher perfusion rate.

[0134] Table 2

[0135]

[0136] Alternatively, in some other embodiments of this application, 0mm < H3 < 4mm, in which case... Figure 17C As shown, within the same distribution area 300, the optical path formed between the second light source 202 and one of the first photoelectric converters 211 is the aforementioned near-range optical path. Similarly, the effective depth of this near-range optical path reaching human skin can be the reticular dermis layer. Furthermore, 4mm ≤ H1 ≤ 7mm, 4mm ≤ H6 < 7mm. Similarly, the aforementioned first distance H1 and sixth distance H6 can be the same or different. At this time, within the same distribution area 300, the optical path formed between the first light source 201 and one of the first photoelectric converters 211 is the aforementioned mid-range optical path. Within the same distribution area 300, the optical path formed between the second light source 202 and another first photoelectric converter 211 is the aforementioned mid-range optical path. Similarly, the effective depth of this mid-range optical path reaching human skin can be the reticular dermis layer.

[0137] In addition, 7mm < H4 ≤ 10mm, 7mm < H5 ≤ 10mm, Figure 17CAs shown, the optical path formed between the second light source 202 and at least one first photoelectric converter 211 outside the distribution area 300 is the 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 also the aforementioned long-range optical path. When H2 > 10 mm, 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 aforementioned 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 described above and will not be repeated here.

[0138] As described above, the detection device 20 can have four optical paths with different distance ranges: a near-range optical path (below 4mm), a mid-range optical path (4mm to 7mm), a far-range optical path (7mm to 10mm), and an ultra-far-range optical path (above 10mm). The PPG modules on the optical paths corresponding to different distance ranges can acquire PPG data with different point indices (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. For example, as shown in Table 3, taking the detection device 20 detecting blood oxygen data as an example, when using the above four optical paths with different distance ranges, the proportion of abnormal data caused by interference from the above-mentioned interference sources in the collected blood oxygen data is 0.17%, and the blood oxygen detection accuracy (rms) is 4.23, indicating high data detection accuracy. The smaller the blood oxygen detection accuracy (rms) value, the higher the accuracy.

[0139] In comparison, when the detection device has only three optical paths with different distance ranges—for example, a near-range (below 4mm), a mid-range (4mm–7mm), and a far-range (7mm–10mm) optical path—as shown in Table 3, the proportion of abnormal data due to interference from the aforementioned sources in the collected blood oxygen data increases to 1.63%, the blood oxygen detection accuracy (rms) increases to 5.13, and the data detection accuracy decreases. Alternatively, when the detection device has only three optical paths with different distance ranges—for example, a near-range (below 4mm) optical path—as shown in Table 3, the proportion of abnormal data due to interference from the aforementioned sources in the collected blood oxygen data increases to 11.50%, the blood oxygen detection accuracy (rms) increases to 6.53, and the data detection accuracy decreases. Therefore, the more optical paths with different distance ranges the detection device 20 has, the higher the accuracy of the obtained health detection data.

[0140] Table 3

[0141]

[0142] The above is an example illustration using the detection device 20 comprising three second light sources 202. In other embodiments of this application, such as... Figure 19 As shown, the detection device 20 may include two second light sources 202. Based on this, the detection device 20 may have two distribution areas, namely distribution area 300a and distribution area 300b, each distribution area having one second light source 202. Adjacent distribution areas 300a and 300b share the same first light source 201.

[0143] In other embodiments of this application, such as Figure 20 As shown, when the detection device 20 has three first light sources 201, six first photoelectric converters 211, and three second light sources 202, the detection device 20 may also include three third light sources 203 (indicated by a cross-filled patterned gemstone in the figure). A third light source 203 is positioned between two adjacent first photoelectric converters 211. In this way, each third light source 203 can form two optical paths with each of the two adjacent first photoelectric converters 211, thereby increasing the number of optical paths between adjacent first photoelectric converters 211 and improving detection accuracy. Figure 20 The example given is that the detection device 20 includes three second light sources 202. In other embodiments of this application, the detection device 20 may also include two second light sources 202, and the corresponding detection device 20 has two distribution areas, with one second light source 202 provided in each distribution area.

[0144] In other embodiments of this application, the detection device 20 may include, for example: Figure 21 The diagram shows four first light sources 201 and four first photoelectric converters 211, with one first photoelectric converter 211 positioned between every two adjacent first light sources 201. Furthermore, within a distribution area, such as distribution area 300a, there are two first light sources 201, one first photoelectric converter 211, and one second light source 202. The technical effects of the aforementioned first light sources 201, second light sources 202, and first photoelectric converters 211 are the same as described above and will not be repeated here.

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

[0146] In other embodiments of this application, such as Figure 22 As shown, the detection device 20 may include four first light sources 201 and four first photoelectric converters 211, with a first photoelectric converter 211 spaced apart between two adjacent first light sources 201. Furthermore, the detection device 20 may also include four second photoelectric converters 221, with a second photoelectric converter 221 spaced between two adjacent first photoelectric converters 211. In this case, a second photoelectric converter 221 and a first light source 201 are positioned between two adjacent first photoelectric converters 211.

[0147] Based on this, the detection device 20 has two distribution areas (distribution area 300a and distribution area 300b). The detection device 20 may include two second light sources 202, one of which is located in one of the aforementioned distribution areas (distribution area 300a and distribution area 300b). Furthermore, within the distribution area, for example, distribution area 300a, there are two second photoelectric converters 221 and one first photoelectric converter 211. In this way, within the same distribution area, any one of the first light source 201 and the second light source 202 can form an optical path not only with the first photoelectric converter 211 but also with the second photoelectric converter 221, thereby increasing the number of optical paths. Furthermore, the method for setting the distance between the aforementioned light sources and each photoelectric converter is similar and will not be elaborated further here.

[0148] In other embodiments of this application, such as Figure 23 As shown, the detection device 20 may further include four second photoelectric converters 221, which are disposed in the detection area 200 (e.g., Figure 9A (As shown). Furthermore, the detection device 20 may include four first light sources 201, four first photoelectric converters 211, and two second light sources 202, with a first photoelectric converter 211 spaced apart between adjacent first light sources 201. The detection device has two distribution areas, for example, distribution area 300a and distribution area 300b.

[0149] In any given distribution area, such as distribution area 300a, there are 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. 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, either the first light source 201 or the second light source 202 can form an optical path not only with the first photoelectric converter 211 but also with the second photoelectric converter 221, thereby increasing the number of optical paths. Furthermore, the method for setting the distance between the light source and each photoelectric converter is similar and will not be elaborated further here.

[0150] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A detection device, characterized in that, include: At least three primary light sources; At least three first photoelectric converters are provided, with at least one first photoelectric converter disposed between two adjacent first light sources, and the at least three first light sources and the at least three first photoelectric converters enclosing a detection area; At least two secondary light sources; Set within the detection area; The detection device has at least two distribution areas, wherein two first light sources, a second light source located between the two first light sources, and at least one first photoelectric converter are distributed in the distribution areas. Within the same distribution area, the first light source has a first distance H1 between itself and at least one first photoelectric converter; the first light source has a second distance H2 between itself and at least one first photoelectric converter outside the distribution area; within the same distribution area, the second light source has a third distance H3 between itself and at least one first photoelectric converter; and the second light source has a fourth distance H4 between itself and at least one first photoelectric converter outside the distribution area. Any two of the first distance H1, the second distance H2, the third distance H3, and the fourth distance H4 are different.

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 2, characterized in that, 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; two first photoelectric converters are distributed within the distribution area.

4. The detection device according to claim 3, characterized in that, Within the same distribution area, the first light source and the two first photoelectric converters are respectively separated by a first distance H1 and a fifth distance H5, wherein the first distance H1 and the fifth distance H5 are different; Within the same distribution area, the second light source and the two first photoelectric converters are respectively separated by the third distance H3 and the sixth distance H6.

5. The detection device according to any one of claims 2-4, characterized in that, 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; The fourth distance H4 is the same in different distribution regions.

6. The detection device according to claim 2, characterized in that, The detection device includes three first light sources and three first photoelectric converters, with one first photoelectric converter disposed between two adjacent first light sources; and one first photoelectric converter is distributed within the distribution area.

7. The detection device according to any one of claims 3-6, characterized in that, The detection device has three distribution areas, and the detection device includes three second light sources, one of which is located in one of the distribution areas; Two adjacent distribution areas share the same first light source.

8. The detection device according to any one of claims 3-6, characterized in that, The detection device has two distribution areas, and the detection device includes two second light sources, one of which 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 3-5, characterized in that, The detection device also includes three third light sources; one of the third light sources is disposed between two adjacent first photoelectric converters.

10. The detection device according to claim 2, characterized in that, The detection device includes four first light sources, four first photoelectric converters, and two second light sources; a first photoelectric converter is disposed between two adjacent first light sources; and a first photoelectric converter is distributed within the distribution area. The detection device has two distribution areas, with one of the second light sources located within one of the distribution areas.

11. The detection device according to claim 2, characterized in that, The detection device includes four first light sources and four first photoelectric converters, with one first photoelectric converter spaced apart between two adjacent first light sources. The detection device further includes four second photoelectric converters, with one second photoelectric converter disposed between two adjacent first photoelectric converters; The distribution area contains two second photoelectric converters and one first photoelectric converter; The detection device has two distribution areas, and the detection device includes two second light sources, one of which is located in one of the distribution areas.

12. The detection device according to claim 1 or 2, characterized in that, The detection device further includes four second photoelectric converters, which are disposed within the detection area; The detection device includes four first light sources, four first photoelectric converters, and two second light sources, with a first photoelectric converter spaced apart between two adjacent first light sources. The distribution area contains two first photoelectric converters, a second photoelectric converter located between the two first photoelectric converters, a second light source, and a first light source, with the second photoelectric converter located between the first light source and the second light source; The detection device has two distribution areas, with one of the second light sources located in one of the distribution areas.

13. The detection device according to any one of claims 1-12, characterized in that, 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.

14. The detection device according to claim 13, characterized in that, The first light source and the second light source further include a third light-emitting device, which emits green light.

15. The detection device according to any one of claims 1-14, characterized in that, The detection device further includes: A light-transmitting cover plate is placed over the first light source, the first photoelectric converter, and the second light source; An optical film layer is disposed on the side of the light-transmitting cover plate facing the first light source; An ink layer is disposed between the optical film layer and the light-transmitting cover plate. The ink layer has 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. A light-shielding element is disposed on the side of the optical film layer away from the light-transmitting cover plate, and the light-shielding element is located between any two of the first light source, the second light source, and the first photoelectric converter.

16. An electronic device, characterized in that, include: Circuit board; The detection device according to any one of claims 1-15, wherein the detection device is disposed on the circuit board.

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