Detection device and wearable apparatus

Abstract

The application discloses a detection device and a wearable device, and belongs to the technical field of intelligent wearing. The detection device comprises a connecting plate, a light emitting assembly, a light detecting assembly and a light filtering piece. The connecting plate has a first light transmitting part and a second light transmitting part. The light emitting assembly and the light detecting assembly are both fixed on the connecting plate, the light emitting side of the light emitting assembly faces the first light transmitting part, and the light receiving side of the light detecting assembly faces the second light transmitting part. The light filtering piece is located on the light receiving side of the light detecting assembly. The light emitting assembly is used for emitting light rays of a specific wave band, and the light filtering piece is used for filtering light rays other than the specific wave band. The detection device selects the light rays shot to the light detecting assembly through the light filtering piece, so that the light detecting assembly receives the light rays of the specific wave band emitted by the light emitting assembly and intercepts the light rays other than the specific wave band. In this way, the influence of environmental stray light on the light detecting assembly can be reduced, and the detection accuracy of the detection device is improved.

Description

Technical Field

[0001] This application relates to the field of smart wearable technology, and in particular to a detection device and a wearable device. Background Technology

[0002] Wearable devices include detection devices that can collect real-time physiological and movement data, such as heart rate, blood oxygen, and steps, and combine this data with algorithms to analyze the wearer's health status in order to provide timely warnings of abnormalities.

[0003] Currently, the detection devices in wearable devices mainly include a light source and a photodetector. The detection principle is as follows: the light source emits light signals, which are transmitted to the skin. Some of the light signals are absorbed by the body tissue, while others are scattered and reflected. These scattered and reflected signals are fed back to the photodetector and received. The light signals received by the photodetector can be converted into electrical signals, which can then be used to analyze human physiological characteristics, such as heart rate and blood oxygen levels.

[0004] However, since the light signal received by the photodetector includes not only the light signal fed back from the skin side, but also ambient light, the presence of ambient light will reduce the detection accuracy. Utility Model Content

[0005] This application provides a detection device and a wearable device. It can solve the problem of low detection accuracy in existing detection devices. The technical solution is as follows:

[0006] In a first aspect, a detection device is provided, comprising: a connecting plate, a light emitting component, a light detection component, and a filter;

[0007] The connecting plate has a first light-transmitting part and a second light-transmitting part;

[0008] The light emitting component is fixed on the connecting plate, and the light emitting side of the light emitting component faces the first light-transmitting part;

[0009] The light detection component is fixed on the connecting plate, and the light-receiving side of the light detection component faces the second light-transmitting part;

[0010] The filter element is located on the light-receiving side of the light detection component, and the orthographic projection of the filter element on the connecting plate at least covers the area where the second light-transmitting part is located;

[0011] The light emitting component is used to emit light in a specific wavelength band, and the filter is used to filter out light in at least the specific wavelength band.

[0012] In the detection device, the light emitting component emits light of a specific wavelength towards the object to be detected. Since a filter is provided on the light-receiving side of the light detection component to filter out light outside the specific wavelength range, the filter can selectively target the light emitted towards the light detection component, ensuring that the light received by the component is the desired light. This means the light detection component receives the light of the specific wavelength range emitted by the light emitting component and blocks light outside the specific wavelength range. This reduces the impact of stray ambient light on the light detection component, improves the signal-to-noise ratio, and thus enhances the accuracy of the detection device. Furthermore, the orthographic projection of the filter onto the connecting plate at least covers the area where the second light-transmitting part is located. This allows for more comprehensive and thorough blocking of external stray ambient light, providing the light detection component with more effective light and ensuring the accuracy of the detection device.

[0013] In some possible implementations, the filter is located on the side of the connecting plate closer to the light detection assembly.

[0014] By placing a filter element on the side of the connecting plate close to the light detection component, the connecting plate can protect the filter element, thereby better protecting the filtering performance of the filter element.

[0015] In some possible implementations, the filter is located on the side of the connecting plate opposite to the light detection assembly.

[0016] The filter is located on the side of the connecting plate away from the photodetector assembly. In other words, when using the detection device, the filter is closer to the object being detected than the connecting plate. This allows the filter to selectively filter out light of specific wavelengths as it reaches the photodetector assembly, thus increasing the proportion of effective light entering the detection device and improving its detection accuracy.

[0017] In some possible implementations, the detection device further includes: a first lens structure and a second lens structure; both the first lens structure and the second lens structure are located on the side of the connecting plate opposite to the light detection component, and the orthographic projection of the first lens structure on the connecting plate covers the area where the first light-transmitting part is located, and the orthographic projection of the second lens structure on the connecting plate covers the area where the second light-transmitting part is located.

[0018] The filter element and the second lens structure are an integral structure.

[0019] A first lens structure is disposed on one side of the connecting plate away from the light detection assembly. The orthographic projection of the first lens structure onto the connecting plate covers the area where the first light-transmitting part is located, thus providing physical protection for this area. A second lens structure is disposed on the other side of the connecting plate away from the light detection assembly. The orthographic projection of the second lens structure onto the connecting plate covers the area where the second light-transmitting part is located, providing physical protection for this area. Furthermore, the filter element and the second lens structure are integrated into one unit, forming a filter lens. This facilitates the connection between the filter lens and the connecting plate.

[0020] In some possible implementations, the light emitting component includes: at least one first light-emitting unit; the first light-emitting unit is used to emit light of a first specific wavelength band, the first specific wavelength band being light used for heart rate detection;

[0021] The filter element is used to filter out light rays other than the first specific wavelength band.

[0022] The first light-emitting unit emits light of a first specific wavelength band, which is used for heart rate detection. By filtering out light other than the first specific wavelength band through a filter, the proportion of light of the first specific wavelength band in the light directed towards the light detection component is increased, thereby improving the accuracy of heart rate detection by the detection device.

[0023] In some possible implementations, the light emitting component includes: at least one first light-emitting unit and at least one second light-emitting unit; the first light-emitting unit is used to emit light of a first specific wavelength band, the first specific wavelength band being light used for heart rate detection; the second light-emitting unit is used to emit light of a second specific wavelength band, the second specific wavelength band being light used for blood oxygen detection.

[0024] The filter element is used to filter out light outside the first specific wavelength band, and / or to filter out light outside the second specific wavelength band.

[0025] The first light-emitting unit emits light of a first specific wavelength, which is used for heart rate detection. The second light-emitting unit emits light of a second specific wavelength, which is used for blood oxygen detection. By filtering out light of the first and second specific wavelengths, the proportion of light of the first and second specific wavelengths in the light emitted towards the light detection component can be increased, thereby improving the accuracy of heart rate and blood oxygen detection.

[0026] In some possible implementations, the light detection component is used to simultaneously receive light from the first specific wavelength band and light from the second specific wavelength band, and the filter is used to filter out light from the first specific wavelength band and light from the second specific wavelength band.

[0027] This allows multiple first light-emitting units to share a single filter and a single photodetector assembly. This reduces the number of photodetector assemblies and filters, simplifies the design and assembly of the detection device, and lowers its cost.

[0028] In some possible implementations, the optical detection component includes: at least one first optical detector and at least one second optical detector; the first optical detector is used to receive light in the first specific wavelength band, and the second optical detector is used to receive light in the second specific wavelength band;

[0029] Wherein, the filter element provided on the light-receiving side of the first light detection device is a first filter element, which is used to filter out light rays other than the first specific wavelength band; the filter element provided on the light-receiving side of the second light detection device is a second filter element, which is used to filter out light rays other than the second specific wavelength band.

[0030] The first photodetector receives light of a first specific wavelength band, and a corresponding first filter is provided on the light-receiving side of the first photodetector to filter out light outside the first specific wavelength band. This improves the accuracy of the first photodetector in receiving light of the first specific wavelength band, increases the signal-to-noise ratio of the light of the first specific wavelength band, and thus improves the accuracy of the detection device in detecting heart rate.

[0031] The second optical detector receives light of a second specific wavelength band, and a corresponding second filter is provided on the light-receiving side of the second optical detector to filter out light other than the second specific wavelength band. This improves the accuracy of the second optical detector in receiving light of the second specific wavelength band, increases the signal-to-noise ratio of the light of the second specific wavelength band, and thus improves the accuracy of blood oxygen detection.

[0032] The light used for heart rate detection and the light used for blood sample detection are filtered and received by corresponding detection and filtering devices, which can reduce the difficulty of signal analysis.

[0033] In some possible implementations, the first filter and the second filter are two separate filters.

[0034] By using the first and second filters as two separate filters, the flexibility of their layout can be improved.

[0035] In some possible implementations, the optical detection component includes: at least one first optical detector and at least one second optical detector; the first optical detector is used to receive light in the first specific wavelength band, and the second optical detector is used to receive light in the second specific wavelength band;

[0036] The filter element covers both the light-receiving side of the first light detector and the light-receiving side of the second light detector, and is used to filter out light rays other than the first specific wavelength band and the second specific wavelength band.

[0037] By simultaneously covering the light-receiving side of the first optical detector and the light-receiving side of the second optical detector with a filter, and by filtering out light rays other than the first specific wavelength band and the second specific wavelength band, the first optical detector and the second optical detector can share a single filter, reducing the number of filters, thereby facilitating the assembly of the detection device and reducing the cost of the detection device.

[0038] In a second aspect, a wearable device is provided, the wearable device comprising: any of the detection devices described above. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram illustrating the use cases of wearable watches in related technologies;

[0041] Figure 2 This is a partially enlarged structural diagram of a wearable watch in related technologies;

[0042] Figure 3 This is a schematic diagram of a detection device structure provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of another detection device structure provided in an embodiment of this application;

[0044] Figure 5 This is a schematic diagram of another detection device structure provided in the embodiments of this application;

[0045] Figure 6 This is a schematic diagram of the layout structure of a detection device provided in an embodiment of this application;

[0046] Figure 7 This is a schematic diagram of another detection device layout structure provided in an embodiment of this application;

[0047] Figure 8 This is a schematic diagram of another detection device structure provided in the embodiments of this application;

[0048] Figure 9 This is a schematic diagram of a detection device structure provided in another embodiment of this application;

[0049] Figure 10 This is a schematic diagram of another detection device layout structure provided in the embodiments of this application;

[0050] Figure 11 This is a schematic diagram of another detection device structure provided in another embodiment of this application;

[0051] Figure 12 This is a schematic diagram of a wearable device structure provided in an embodiment of this application;

[0052] Figure 13 This is a schematic diagram of another wearable device structure provided in an embodiment of this application. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0054] Wearable devices include smart bracelets, smartwatches, smart rings, smart gloves, smart armbands, smart chest straps, smart belts, and smart helmets. Taking smartwatches as an example, this section explains the problems associated with wearable devices.

[0055] Currently, wearable watches all emphasize sports and health as key selling points. Among them, heart rate measurement, blood oxygen measurement, and blood glucose measurement are often based on PPG (Photo Plethysmo Graphy) technology. Therefore, the strength of the effective PPG signal is very important for the accuracy of heart rate, blood oxygen, and other functional measurements.

[0056] Typically, different manufacturers use different back cover designs for wearable watches, but most manufacturers use a pure black hard PC (Polycarbonate) back cover with added protrusions. The protrusion structure includes a PPG transparent lens and a light-blocking structure.

[0057] Figure 1 This is a schematic diagram illustrating the use cases of wearable watches in related technologies, such as... Figure 1As shown, during the wearing of the wearable watch 100, natural light shines upon it. The wearable watch 100 typically includes a light source and a photodiode (PD). The light source, for example, is a light-emitting diode (LED). The principle of detecting human physiological characteristics is as follows: light is emitted by the LED. After the light reaches the skin, some of it is absorbed by the body tissue, while some is scattered and reflected. The scattered and reflected light is fed back to the PD and received by it. The light received by the PD can be converted into an electrical signal, which can then be used to analyze human physiological characteristics, such as heart rate and blood oxygen levels.

[0058] Figure 2 This is a magnified schematic diagram of a portion of the structure of a wearable watch in related technologies, such as... Figure 2 As shown, during exercise, the user's arm swings. Due to the significant weight of the wearable watch 100, it experiences inertial motion during arm swing, creating a gap between the watch and the arm. Natural light rays incident on the wearable watch 100 pass through this gap and reach the PD (Power Display). If the gap is too large, the amount of natural light reaching the PD increases, causing PD saturation. Consequently, the algorithm cannot analyze the PPG (Power Generation Group) signal, meaning it cannot analyze the effective signal, directly affecting the accuracy of human physiological characteristic measurements.

[0059] The raised panel structure is helpful for users measuring heart rate during exercise. Therefore, to address the PD saturation issue caused by the gap between the wearable watch 100 and the arm during exercise, related technologies increase the height of the raised panel on the back cover. Increasing the height of the raised panel reduces the gap between the wearable watch 100 and the arm during exercise, thereby improving the PD saturation problem. However, since the raised panel on the back cover of the wearable watch 100 is generally made of rigid PC plastic, for heart rate and blood oxygen measurement, if the user wears it too tightly, it will affect blood flow in the arm, resulting in low effective signal acquisition by the PD. Furthermore, the rigid PC plastic back cover will press heavily on the skin, causing the skin to turn white. This whitening of the skin will cause more LED light emitted from the wearable watch 100 to be reflected through the epidermis, reducing the power of the LED light that is scattered back to the PD after penetrating the dermis, resulting in energy loss. Additionally, it will reduce the proportion of effective signal, which is detrimental to algorithm analysis. Conversely, if the user wears it too loosely, a large gap will appear between the raised panel and the arm during exercise, weakening the design of the raised panel.

[0060] Based on this, this application provides a detection device that can be used in wearable devices, which can increase the proportion of effective signals and reduce the proportion of invalid signals, thereby improving the detection accuracy of the detection device.

[0061] Figure 3This is a schematic diagram of a detection device structure provided in an embodiment of this application. Please refer to it. Figure 3 In one embodiment of this application, a detection device 200 is provided, including: a connecting plate 210, a light emitting component 220, a light detection component 230, and a filter 240.

[0062] The connecting plate 210 has a first light-transmitting part B1 and a second light-transmitting part B2.

[0063] The light emitting component 220 is fixed on the connecting plate 210, and the light emitting side of the light emitting component 220 faces the first light-transmitting part B1.

[0064] The light detection component 230 is fixed on the connecting plate 210, and the light-receiving side of the light detection component 230 faces the second light-transmitting part B2.

[0065] The filter element 240 is located on the light-receiving side of the light detection assembly 230, and the orthographic projection of the filter element 240 on the connecting plate 210 at least covers the area where the second light-transmitting part B2 is located.

[0066] The light emitting component 220 is used to emit light of a specific wavelength towards the object X to be detected, and the filter component 240 is used to filter out light of at least the specific wavelength.

[0067] The object to be detected, X, is, for example, human skin. When the detection device 200 is used for detection, the light emitting component 220 emits light of a specific wavelength towards the skin. Inside the skin, some of the light is absorbed by human tissue (including blood), while the rest is scattered and reflected. A portion of the scattered and reflected light is received by the light detection component 230 and converted into an electrical signal. Based on this electrical signal, human physiological characteristics can be analyzed, such as heart rate and blood oxygenation data.

[0068] Understandably, the light emitted by the light emitting component 220 passes through the first light-transmitting part B1 and then travels to the object to be detected X. The scattered and reflected light passes through the second light-transmitting part B2 and the filter 240 before traveling to the light detection component 230.

[0069] It should be noted that the filter element 240 is used to filter out light outside of a specific wavelength band. That is, the filter element 240 can filter out only light outside of a specific wavelength band. For example, if the light emitted by the filter element 240 in the specific wavelength band is green light, then the filter element 240 can filter out light other than green light. In other embodiments, the filter element 240 can also filter out some light within the specific wavelength band while filtering out light outside of the specific wavelength band. For example, if the light emitted by the filter element 240 in the specific wavelength band includes green light, red light, and infrared light, then the filter element 240 can filter out not only green light, red light, and infrared light, but also red light and infrared light within the specific wavelength band.

[0070] In summary, the light emitting component in the detection device emits light of a specific wavelength towards the object to be detected. Since a filter is provided on the light-receiving side of the light detection component to filter out light outside the specific wavelength range, the filter can selectively target the light emitted towards the light detection component, ensuring that the light received by the component is the desired light. This means the light detection component receives the light of the specific wavelength range emitted by the light emitting component and blocks light outside the specific wavelength range. This reduces the impact of stray ambient light on the light detection component, improves the signal-to-noise ratio, and thus enhances the accuracy of the detection device. Furthermore, the orthographic projection of the filter onto the connecting plate at least covers the area where the second light-transmitting part is located. This allows for more comprehensive and thorough blocking of stray ambient light, providing the light detection component with more effective light and ensuring the accuracy of the detection device.

[0071] It should be noted that the signal-to-noise ratio (SNR) is the ratio of signal power to noise power, usually expressed in decibels (dB). It reflects the relative strength of the effective signal compared to the noise (i.e., the ineffective signal). The higher the SNR value, the better the signal quality and the less interference.

[0072] It can be understood that a valid signal or valid light is light emitted from the light emitting component 220 in the detection device 200 at a specific wavelength, while an invalid signal refers to light outside the specific wavelength, such as stray light from the external environment.

[0073] Please continue to refer to this. Figure 3 In some possible implementations, the filter 240 is located on the side of the connecting plate 210 closer to the light detection assembly 230.

[0074] The connecting plate 210 is, for example, high-transparency glass, with a coating to block the area outside the first light-transmitting part B1 and the second light-transmitting part B2, and a light-transmitting area is formed in the area corresponding to the first light-transmitting part B1 and the second light-transmitting part B2 so that light can pass through.

[0075] The filter element 240 can have a specific optical thin film, such as an interference film, absorption film, or reflection film, deposited on the connecting plate 210 in the area where the second light-transmitting part B2 is located. This allows selective transmission of light of a specific wavelength by utilizing the principles of light interference, absorption, and reflection. In this way, the filter element 240 can filter out light outside a specific wavelength band while allowing light of that specific wavelength band to pass through.

[0076] For example, a high-transmittance film can also be deposited on the connecting plate 210 at the first light-transmitting part B1 and the second light-transmitting part B2 to enhance the transmittance of light and thereby improve the transmission efficiency of light.

[0077] By providing a filter element 240 on the side of the connecting plate 210 close to the light detection component 230, the connecting plate 210 can protect the filter element 240, thereby better protecting the filtering performance of the filter element 240.

[0078] Figure 4 This is a schematic diagram of another detection device structure provided in an embodiment of this application. Please refer to it. Figure 4 In some possible implementations, the filter 240 is located on the side of the connecting plate 210 away from the light detection assembly 230.

[0079] The filter 240 is located on the side of the connecting plate 210 away from the light detection assembly 230. That is, when using the detection device 200, the filter 240 is closer to the object X to be detected relative to the connecting plate 210. Thus, when light from the object X is incident on the light detection assembly 230, the filter 240 can select the light earlier, filtering out light of specific wavelengths while allowing light of specific wavelengths to pass through. This increases the proportion of effective light incident on the detection device 200, thereby improving the detection accuracy of the detection device 200.

[0080] Please continue to refer to this. Figure 4 In some possible implementations, the detection device 200 further includes a first lens structure 250 and a second lens structure 260. Both the first lens structure 250 and the second lens structure 260 are located on the side of the connecting plate 210 away from the light detection assembly 230, and the orthographic projection of the first lens structure 250 on the connecting plate 210 covers the area where the first light-transmitting part B1 is located, and the orthographic projection of the second lens structure 260 on the connecting plate 210 covers the area where the second light-transmitting part B2 is located.

[0081] The filter element 240 and the second lens structure 260 are integrated into one structure.

[0082] It should be noted that, in one possible implementation, the first light-transmitting part B1 and the second light-transmitting part B2 on the connecting plate 210 can both be light holes opened on the connecting plate 210. The light holes facilitate the direct passage of light and can reduce the weight of the connecting plate 210.

[0083] The filter element 240 can be located on the side of the second lens structure 260 closer to the light detection component 230, or it can be located on the side of the second lens structure 260 farther away from the light detection component 230. For example... Figure 4 As shown, the filter element 240 can be an optical thin film such as an interference film, absorption film, or reflection film deposited on the side of the second lens structure 260 near the light detection component 230, which utilizes the principles of light interference, absorption, and reflection to achieve selective transmission of light of a specific wavelength. The structure and position of the filter element 240 can be set according to actual needs, and this application does not impose specific limitations here.

[0084] A first lens structure 250 is provided on one side of the connecting plate 210 away from the light detection assembly 230. The orthographic projection of the first lens structure 250 on the connecting plate 210 covers the area where the first light-transmitting part B1 is located, thus providing physical protection for the area of ​​the connecting plate 210 where the first light-transmitting part B1 is located. A second lens structure 260 is provided on one side of the connecting plate 210 away from the light detection assembly 230. The orthographic projection of the second lens structure 260 on the connecting plate 210 covers the area where the second light-transmitting part B2 is located, thus providing physical protection for the area of ​​the connecting plate 210 where the second light-transmitting part B2 is located. Furthermore, the filter element 240 and the second lens structure 260 are an integral structure, that is, the filter element 240 is integrated into the second lens structure 260 to form a filter lens, which facilitates the connection between the filter lens and the connecting plate 210.

[0085] Figure 5 This is a schematic diagram of another detection device structure provided in the embodiments of this application. Please refer to it. Figure 5 In some possible implementations, the light emitting component 220 includes at least one first light-emitting unit 221. The first light-emitting unit 221 is used to emit light of a first specific wavelength band, which is light used for heart rate detection.

[0086] The filter element 240 is used to filter out light rays other than the first specific wavelength band.

[0087] For example, the first light-emitting unit 221 can be a green LED light-emitting unit, and heart rate detection is performed by the green light emitted by the green LED light-emitting unit.

[0088] The first light-emitting unit 221 is used to emit light of a first specific wavelength band, which is the light used for heart rate detection. By filtering out light other than the first specific wavelength band through the filter element 240, the proportion of light of the first specific wavelength band in the light directed towards the light detection component 230 is increased, that is, the signal-to-noise ratio is increased, thereby improving the accuracy of heart rate detection by the detection device 200.

[0089] In one possible implementation, the light detection assembly 230 includes at least one light detector 231. The light detector 231 is used to receive light of a first specific wavelength band.

[0090] The relationship between the photodetector 231 and the first light-emitting unit 221 can be one-to-one, or one photodetector 231 can correspond to multiple first light-emitting units 221, multiple photodetectors 231 can correspond to one first light-emitting unit 221, or multiple photodetectors 231 can correspond to multiple first light-emitting units 221. When multiple photodetectors 231 correspond to multiple first light-emitting units 221, the number of photodetectors 231 can be equal to, less than, or greater than the number of first light-emitting units 221. The specific correspondence between the photodetectors 231 and the first light-emitting units 221 is selected according to actual needs, and this application does not impose specific limitations.

[0091] The relationship between the filter element 240 and the photodetector 231 can be one-to-one, one-to-many, many-to-one, or many-to-many. In the case of multiple filter elements 240 and multiple photodetectors 231, the number of filter elements 240 can be equal to, less than, or greater than the number of photodetectors 231. The specific correspondence between the filter elements 240 and the photodetectors 231 is selected according to actual needs, and this application does not impose specific limitations.

[0092] Figure 6 This is a schematic diagram of the layout structure of a detection device provided in an embodiment of this application. Please refer to it. Figure 6 The detection device 200 includes a first light-emitting unit 221 and two photodetectors 231, with the two photodetectors 231 located on opposite sides of the first light-emitting unit 221. Both photodetectors 231 can receive light of a first specific wavelength emitted by the first light-emitting unit 221. This allows the detection device 200 to obtain multiple pieces of information that can be used to analyze heart rate, or to obtain stronger information from the two photodetectors 231 to analyze heart rate, thereby improving the reliability of heart rate detection by the detection device 200.

[0093] For example, please continue to refer to Figure 6 There is a one-to-one correspondence between the light detection element 231 and the filter element 240, that is, a filter element 240 is provided on the light-receiving side of each light detection element 231.

[0094] When there is a one-to-one correspondence between the photodetector 231 and the filter 240, the layout of the detection device 200 becomes more flexible, making it easier to design the photodetector 231 and the filter 240 corresponding to the first light-emitting unit 221 as needed.

[0095] Figure 7 This is a schematic diagram of another detection device layout provided in an embodiment of this application. Please refer to it. Figure 7 For example, the detection device 200 is a circular detection device 200, and the detection device 200 includes: four first light-emitting units 221 and four light-detecting elements 231.

[0096] The four first light-emitting units 221 and the four light-detecting elements 231 are all equally spaced along the circumference. The four first light-emitting units 221 can be located in the inner ring, and the four light-detecting elements 231 can be located in the outer ring, that is, the four light-detecting elements 231 are located on the outer side of the four first light-emitting units 221 in the radial direction.

[0097] The first light-emitting unit 221 and the light-detecting element 231, which are adjacent in the circumferential direction, are staggered.

[0098] By staggering the circumferentially adjacent first light-emitting units 221 and photodetectors 231, one photodetector 231 can simultaneously receive light of a first specific wavelength emitted by two adjacent first light-emitting units 221. This allows the detection device 200 to obtain multiple pieces of information that can be used to analyze heart rate, or to obtain stronger information from two photodetectors 231 to analyze heart rate, thereby improving the reliability of heart rate detection by the detection device 200. Furthermore, the number of photodetectors 231 can be reduced, lowering the size and cost of the detection device 200.

[0099] In other feasible embodiments, the detection device 200 may also be provided with two first light-emitting units 221 and one light-detecting element 231, or it may be provided with two first light-emitting units 221, each first light-emitting unit 221 corresponding to an adjacent light-detecting element 231, etc. The number of first light-emitting units and light-detecting elements 231 is not exhaustively listed here.

[0100] For example, please continue to refer to Figure 7 There is a many-to-one relationship between the light detector 231 and the filter 240, that is, the light-receiving side of the four light detectors 231 shares one filter 240.

[0101] When the light-receiving side of four light detectors 231 shares a single filter 240, the number of filters 240 can be reduced, thereby facilitating the fabrication of the detection device 200 and reducing its cost.

[0102] Figure 8This is a schematic diagram of another detection device structure provided in the embodiments of this application. Please refer to it. Figure 8 In some other possible implementations, the light emitting component 220 includes at least one first light-emitting unit 221 and at least one second light-emitting unit 222. The first light-emitting unit 221 emits light of a first specific wavelength band, which is light used for heart rate detection. The second light-emitting unit 222 emits light of a second specific wavelength band, which is light used for blood oxygen detection.

[0103] The filter element 240 is used to filter out light rays other than the first specific wavelength band, and / or to filter out light rays other than the second specific wavelength band.

[0104] For example, the first light-emitting unit 221 can be a green LED light-emitting unit, and heart rate detection is performed using the green light emitted by the green LED light-emitting unit. The second light-emitting unit 222 can include at least one red LED light-emitting unit and at least one infrared LED light-emitting unit. Blood oxygenation is performed using the red light emitted by the red LED light-emitting unit and the infrared light emitted by the infrared LED light-emitting unit.

[0105] The first light-emitting unit 221 emits light of a first specific wavelength band, which is used for heart rate detection. The second light-emitting unit 222 emits light of a second specific wavelength band, which is used for blood oxygen detection. By filtering out light of the first and second specific wavelength bands using the filter 240, the proportion of light of the first and second specific wavelength bands in the light directed towards the light detection component 230 can be increased, thereby improving the accuracy of heart rate and blood oxygen detection by the detection device 200.

[0106] In one possible implementation, the light detection component 230 is used to simultaneously receive light in a first specific wavelength band and light in a second specific wavelength band, and the filter component 240 is used to filter out light other than the first specific wavelength band and light other than the second specific wavelength band.

[0107] In this way, multiple first light-emitting units 221 can share a single filter element 240 and a single light detection component 230. This reduces the number of light detection components 230 and the number of filters 240, making it easier to design and assemble the detection device 200 and reducing its cost.

[0108] Figure 9 This is a schematic diagram of a detection device structure provided in another embodiment of this application. Please refer to it. Figure 9In another possible implementation, the light detection component 230 includes at least one first light detector 232 and at least one second light detector 233. The first light detector 232 is used to receive light in a first specific wavelength band, and the second light detector 233 is used to receive light in a second specific wavelength band.

[0109] In this design, the filter 240 disposed on the light-receiving side of the first light detector 232 is a first filter 241, which is used to filter out light rays other than a first specific wavelength band. The filter 240 disposed on the light-receiving side of the second light detector 233 is a second filter 242, which is used to filter out light rays other than a second specific wavelength band.

[0110] The first photodetector 232 receives light of a first specific wavelength band. A corresponding first filter 241 is provided on the light-receiving side of the first photodetector 232 to filter out light other than the first specific wavelength band. This improves the accuracy of the first photodetector 232 in receiving light of the first specific wavelength band, increases the signal-to-noise ratio of the light of the first specific wavelength band, and thus improves the accuracy of heart rate detection by the detection device 200.

[0111] The second photodetector 233 receives light of a second specific wavelength band. A corresponding second filter 242 is provided on the light-receiving side of the second photodetector 233 to filter out light other than the second specific wavelength band. This improves the accuracy of the second photodetector 233 in receiving light of the second specific wavelength band, increases the signal-to-noise ratio of the light of the second specific wavelength band, and thus improves the accuracy of blood oxygen detection performed by the detection device 200.

[0112] The light used for heart rate detection and the light used for blood sample detection are filtered and received by the corresponding detection element and filter element 240, which can reduce the difficulty of signal analysis.

[0113] For example, the first filter 241 and the second filter 242 are two different filters 240 that are set separately.

[0114] By using the first filter element 241 and the second filter element 242 as two different filters 240 that are separately arranged, the flexibility of the layout of the first filter element 241 and the second filter element 242 can be improved.

[0115] For example, the first filter element 241 and the second filter element 242 may also be two parts of the same filter element 240. For example, different regions of the same filter element 240 may be coated to achieve the filtering of light in a specific wavelength band.

[0116] It should be noted that the relationship between the first light-emitting unit 221 and the first light-emitting element 232 can be one-to-one, or one first light-emitting element 232 can correspond to multiple first light-emitting units 221, multiple first light-emitting elements 232 can correspond to one first light-emitting unit 221, or multiple first light-emitting elements 232 can correspond to multiple first light-emitting units 221. When multiple first light-emitting elements 232 correspond to multiple first light-emitting units 221, the number of first light-emitting elements 232 can be equal to, less than, or greater than the number of first light-emitting units 221. The specific correspondence between the first light-emitting elements 232 and the first light-emitting units 221 is selected according to actual needs, and this application does not impose specific limitations.

[0117] The relationship between the first filter element 241 and the first photodetector 232 can be one-to-one, one-to-many, many-to-one, or many-to-many. In the case of multiple first filter elements 241 and multiple first photodetectors 232, the number of first filter elements 241 can be equal to, less than, or greater than the number of first photodetectors 232. The specific correspondence between the first filter elements 241 and the first photodetectors 232 is selected according to actual needs, and this application does not impose specific limitations.

[0118] Similarly, the correspondence between the second light-emitting unit 222 and the second light-detecting element 233, as well as the correspondence between the second light-filtering element 242 and the second light-detecting element 233, is the same and will not be explained here.

[0119] For example, the second light-emitting unit 222 includes a red LED light-emitting unit and an infrared LED light-emitting unit.

[0120] The second light detection element 233 includes: a red light detection element and an infrared light detection element.

[0121] The second filter element 242 includes a red light filter element and an infrared light filter element.

[0122] Among them, the first light-emitting unit 221, the first light detection element 232 and the first light filter element 241 can be in a one-to-one correspondence relationship, the red light LED light-emitting unit, the red light detection element and the red light filter element can be in a one-to-one correspondence relationship, and the infrared light LED light-emitting unit, the infrared light detection element and the infrared light filter element can be in a one-to-one correspondence relationship.

[0123] The first filter element 241 is used to filter out green light rays other than the first specific wavelength band, such as filtering out green light rays in the wavelength band other than 495-570nm, and allowing green light rays in the 495-570nm wavelength band to be directed toward the first photodetector element 232.

[0124] Red light filters are used to filter out red light rays outside the red light band, such as red light rays in the band other than 620-750nm, while allowing red light rays in the 620-750nm band to reach the red light detection device.

[0125] Infrared light filters are used to filter out infrared light rays outside the infrared light band, such as filtering out infrared light rays in the band outside 750-1000nm, while allowing infrared light rays in the 750-1000nm band to reach the infrared light detection device.

[0126] By using the red light filter and infrared light filter in the first filter 241 and the second filter 242, narrowband filtering can be achieved, allowing light within a specific wavelength band to pass through while blocking other wavelengths outside that band, thus improving data accuracy.

[0127] Figure 10 This is a schematic diagram of another detection device layout provided in the embodiments of this application. Please refer to it. Figure 10 For example, the light emitting component 220 includes a three-in-one LED emitting unit that integrates a green LED emitting unit G, a red LED emitting unit R, and an infrared LED emitting unit IR.

[0128] A first photodetector 232 and a second photodetector 233 are respectively disposed on the upper and lower sides of the light emitting component 220. The first photodetector 232 and the second photodetector 233 are, for example, photodiodes (PDs).

[0129] A first filter 241 is provided on the light-receiving side of the first light detector 232, and the first filter 241 only allows the green light band to pass through. A second filter 242 is provided on the light-receiving side of the second light detector 233, and the second filter 242 only allows the red light band and the infrared light band to pass through.

[0130] Figure 11 This is a schematic diagram of another detection device structure provided in another embodiment of this application. Please refer to it. Figure 11 In some other possible implementations, the light detection component 230 includes at least one first light detector 232 and at least one second light detector 233. The first light detector 232 is used to receive light in a first specific wavelength band, and the second light detector 233 is used to receive light in a second specific wavelength band.

[0131] The filter element 240 covers both the light-receiving side of the first light detector 232 and the light-receiving side of the second light detector 233. The filter element 240 is used to filter out light rays other than the first specific wavelength band and the second specific wavelength band.

[0132] By simultaneously covering the light-receiving side of the first photodetector 232 and the light-receiving side of the second photodetector 233 with the filter element 240, and by filtering out light rays other than the first specific wavelength band and the second specific wavelength band, the first photodetector 232 and the second photodetector 233 can share a single filter element 240, reducing the number of filters 240, thereby facilitating the assembly of the detection device 200 and reducing the cost of the detection device 200.

[0133] In summary, the light emitting component in the detection device emits light of a specific wavelength towards the object to be detected. Since a filter is provided on the light-receiving side of the light detection component to filter out light outside the specific wavelength range, the filter can selectively target the light emitted towards the light detection component, ensuring that the light received by the component is the desired light. This means the light detection component receives the light of the specific wavelength range emitted by the light emitting component and blocks light outside the specific wavelength range. This reduces the impact of stray ambient light on the light detection component, improves the signal-to-noise ratio, and thus enhances the accuracy of the detection device. Furthermore, the orthographic projection of the filter onto the connecting plate at least covers the area where the second light-transmitting part is located. This allows for more comprehensive and thorough blocking of stray ambient light, providing the light detection component with more effective light and ensuring the accuracy of the detection device.

[0134] In another embodiment of this application, a wearable device 300 is provided, which includes: a detection device 200 as described above.

[0135] Figure 12 This is a schematic diagram of a wearable device structure provided in an embodiment of this application. Please refer to it. Figure 12 In some possible implementations, the wearable device 300 also includes a housing 310.

[0136] The detection device 200 is located inside the housing 310.

[0137] The housing 310 has a first light-transmitting area Q1 and a second light-transmitting area Q2. The light emitting component 220 corresponds to the first light-transmitting area Q1, and the light emitted by the light emitting component 220 is directed towards the object to be detected X after passing through the first light-transmitting area Q1.

[0138] The light detection component 230 corresponds to the second light transmission area Q2. The light reflected from the object to be detected X passes through the second light transmission area Q2 and then shines on the light detection component 230.

[0139] In some possible implementations, the housing 310 has a light-transmitting hole K. The area within the light-transmitting hole K forms a first light-transmitting area Q1 or a second light-transmitting area Q2. For example, the number of light-transmitting holes K is configured to be two, with one light-transmitting hole K corresponding to the first light-transmitting area Q1 and the other light-transmitting hole K corresponding to the second light-transmitting area Q2.

[0140] The filter element 240 is fixed to the housing 310 around the light-transmitting hole K. For example, the filter element 240 is fixed to the housing 310 around the light-transmitting hole K by means of adhesive bonding, injection molding, etc.

[0141] The filter element 240 is located on the side of the connecting plate 210 near the light detection component 230.

[0142] Figure 13 This is a schematic diagram of another wearable device structure provided in an embodiment of this application. Please refer to it. Figure 13 The wearable device 300 also includes a power module 320 and a processing module 330.

[0143] The power supply module 320 is connected to the light emitting component 220, the light detection component 230, and the processing module 330, and is used to supply power to these components. The processing module 330 is used to drive the light emitting component 220 to emit light, and also to receive the electrical signal fed back from the light detection component 230, amplify and sample the electrical signal to obtain human characteristic parameters.

[0144] Understandably, after the light emitted by the light emitting component 220 reaches the skin, some of the light is absorbed by the human tissue, while the rest is scattered and reflected. A portion of the scattered and reflected light is received by the light detection component 230 and converted into an electrical signal. After receiving the electrical signal output by the light detection component 230, the processing module 330 can amplify and sample it to obtain human characteristic parameters. Since the heartbeat is transmitted through blood vessels to the skin capillaries, it causes changes in blood volume. For example, when the heart contracts, blood vessels expand, blood volume increases, more light is absorbed, and less light is scattered. Conversely, when the heart relaxes, blood vessels recover, blood volume recovers, less light is absorbed, and more light is scattered. Therefore, the scattered and reflected light changes regularly with the human pulse. Based on the changes in the detected electrical signal, changes in the pulse wave can be detected, and data such as heart rate and blood oxygenation can be determined based on these changes.

[0145] The wearable device 300 in this embodiment is exemplified by a wearable watch. Since the wearable watch includes the detection device 200 described in the previous embodiment, most wavelengths of ambient light generated during movement can be filtered out by the filter 240, minimizing the impact of stray ambient light on the wearable device 300. This significantly improves the signal-to-noise ratio on the optical detection component 230, thereby enhancing the accuracy of heart rate and blood oxygen measurements during exercise. It also improves the stability of detection in complex environments. For example, in strong outdoor light conditions, it effectively blocks high-intensity stray light (such as visible light and near-infrared light) from sunlight, preventing the optical detection component 230 from saturating due to overload and ensuring signal integrity. Furthermore, in indoor or nighttime scenarios, it reduces interference wavelengths from lighting (such as LED lights and fluorescent lights), maintaining signal stability. Finally, in dynamic motion scenarios, the high selectivity of the filter 240 reduces the impact of angle deviation on the signal, ensuring data continuity, as the device may experience changes in the incident angle due to shaking. In addition, motion-related noise can be reduced. For example, the micro-displacement of the skin and the light detection component 230 during movement can cause changes in the ambient light reflection path. The filter 240 reduces signal baseline drift caused by stray light fluctuations by limiting the range of light wavelengths.

[0146] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0147] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A detection device, characterized in that, include: Connecting plate (210), light emitting component (220), light detection component (230), and filter (240); The connecting plate (210) has a first light-transmitting part (B1) and a second light-transmitting part (B2); The light emitting component (220) is fixed on the connecting plate (210), and the light emitting side of the light emitting component (220) faces the first light-transmitting part (B1); The light detection component (230) is fixed on the connecting plate (210), and the light-receiving side of the light detection component (230) faces the second light-transmitting part (B2); The filter (240) is located on the light-receiving side of the light detection assembly (230), and the orthographic projection of the filter (240) on the connecting plate (210) at least covers the area where the second light-transmitting part (B2) is located; The light emitting component (220) is used to emit light of a specific wavelength, and the filter (240) is used to filter out light of at least the specific wavelength.

2. The detection device according to claim 1, characterized in that, The filter (240) is located on the side of the connecting plate (210) near the light detection component (230).

3. The detection device according to claim 1, characterized in that, The filter (240) is located on the side of the connecting plate (210) opposite to the light detection component (230).

4. The detection device according to claim 3, characterized in that, The detection device further includes: a first lens structure (250) and a second lens structure (260); the first lens structure (250) and the second lens structure (260) are both located on the side of the connecting plate (210) away from the light detection component (230), and the orthographic projection of the first lens structure (250) on the connecting plate (210) covers the area where the first light-transmitting part (B1) is located, and the orthographic projection of the second lens structure (260) on the connecting plate (210) covers the area where the second light-transmitting part (B2) is located; The filter element (240) and the second lens structure (260) are an integral structure.

5. The detection device according to any one of claims 1 to 4, characterized in that, The light emitting component (220) includes: at least one first light-emitting unit (221); the first light-emitting unit (221) is used to emit light of a first specific wavelength band, the first specific wavelength band of light being light used for heart rate detection; The filter (240) is used to filter out light outside the first specific wavelength band.

6. The detection device according to any one of claims 1 to 4, characterized in that, The light emitting component (220) includes at least one first light-emitting unit (221) and at least one second light-emitting unit (222); the first light-emitting unit (221) is used to emit light of a first specific wavelength band, which is light used for heart rate detection; the second light-emitting unit (222) is used to emit light of a second specific wavelength band, which is light used for blood oxygen detection. The filter (240) is used to filter out light outside the first specific wavelength band and / or to filter out light outside the second specific wavelength band.

7. The detection device according to claim 6, characterized in that, The light detection component (230) is used to simultaneously receive light from the first specific wavelength band and light from the second specific wavelength band, and the filter (240) is used to filter out light from the first specific wavelength band and light from the second specific wavelength band.

8. The detection device according to claim 6, characterized in that, The light detection component (230) includes at least one first light detector (232) and at least one second light detector (233); the first light detector (232) is used to receive light in the first specific wavelength band, and the second light detector (233) is used to receive light in the second specific wavelength band. The filter (240) provided on the light-receiving side of the first light detector (232) is a first filter (241), which is used to filter out light rays other than the first specific wavelength band; the filter (240) provided on the light-receiving side of the second light detector (233) is a second filter (242), which is used to filter out light rays other than the second specific wavelength band.

9. The detection device according to claim 8, characterized in that, The first filter (241) and the second filter (242) are two separate filters (240).

10. The detection device according to claim 6, characterized in that, The light detection component (230) includes at least one first light detector (232) and at least one second light detector (233); the first light detector (232) is used to receive light in the first specific wavelength band, and the second light detector (233) is used to receive light in the second specific wavelength band. The filter (240) covers both the light-receiving side of the first light detector (232) and the light-receiving side of the second light detector (233), and the filter (240) is used to filter out light rays other than the first specific wavelength band and the second specific wavelength band.

11. A wearable device, characterized in that, The wearable device includes: the detection device as described in any one of claims 1 to 10.

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