Detection apparatus, wearable device, and detection method

Abstract

The present application provides a detection apparatus, a wearable device, and a detection method. The detection apparatus may comprise an optical device with adjustable properties such as refractive index and shape. By adjusting the propagation direction of detection light emitted from a light source by means of the optical device, more detection light can be directed to a point where detection is needed, and more light from the point where detection is needed can be received by a photoelectric detector. Physiological data obtained by means of the detection apparatus are highly accurate and can more truly reflect the physiological state of a detection site. In addition, the arrangement of just one light source and one photoelectric detector enables the detection apparatus to achieve the functions of a detection apparatus comprising a plurality of light sources and / or a plurality of photoelectric detectors. This design not only facilitates the miniaturization of the detection apparatus and even the wearable device, improving portability, but also helps reduce the power consumption of the detection apparatus, extending usage time.

Description

Detection devices, wearable devices and detection methods

[0001] This application claims priority to Chinese Patent Application No. 202510311431.8, filed on March 14, 2025, entitled "Detection Device, Wearable Device and Detection Method", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of terminal device software, and more specifically, to a detection device, a wearable device, and a detection method. Background Technology

[0003] Photoplethysmography (PPG) is a non-invasive optical technique for detecting changes in vascular blood volume. Typically, a PPG sensor includes a light source and a photodetector. The light source emits light, which is absorbed, reflected, scattered, or transmitted by different tissues after entering the body. The photodetector receives the light reflected and / or transmitted by these tissues. By analyzing the light emitted and received by the PPG sensor, information related to physiological parameters such as pulse, blood oxygenation, and vascular elasticity can be obtained.

[0004] Improving the accuracy of PPG sensor detection results and enhancing the portability of detection devices and wearable devices will help improve the user experience of using PPG sensors to detect physiological signals. Summary of the Invention

[0005] This application provides a detection device, a wearable device, and a detection method. The detection device may include an optical component with adjustable refractive index, shape, and other characteristics. By adjusting the propagation direction of the detection light through this optical component, more detection light can be incident on the point to be detected, and more light from the point to be detected can be received by the photodetector. The detection device provides highly accurate physiological data, which can more realistically reflect the physiological state of the detected site.

[0006] In a first aspect, a detection device is provided, comprising: a light source, a photodetector, and an optical element, wherein the light source is used to emit detection light; the optical element is used to transmit detection light; the optical element is also used to receive a control signal and adjust the propagation direction of the detection light according to the control signal; and the photodetector is used to detect the detection light passing through the optical element.

[0007] In one possible implementation, the detection light can be incident on the side of the optics facing the light source and exit on the side of the optics away from the light source. And / or, the detection light can be incident on the side of the optics away from the photodetector and exit on the side of the optics facing the photodetector.

[0008] In some scenarios, the aforementioned detection device is used to detect physiological data; this device can also be referred to as a PPG module.

[0009] In one possible implementation, the number of light sources or photodetectors can be multiple.

[0010] In one possible implementation, the detection light can be collimated light or scattered light.

[0011] In one possible implementation, the optics can be used to adjust the propagation direction of light from the light source, and / or the optics can be used to adjust the propagation direction of light from the detection point.

[0012] In one possible implementation, the detection device further includes one or more of a photoelectric measurement front-end controller, a signal processor, or a central processing system. The photoelectric measurement front-end controller can establish circuit connections with the light source and the photodetector respectively, and is used to drive the light source and the photodetector. The signal processor can establish circuit connections with the photodetector and is used to perform preprocessing such as noise reduction and filtering on the electrical signal output by the photodetector. The central processing system can be circuit connected to the photoelectric measurement front-end controller, the signal processor, and the controller respectively, and the central processing system can be used to determine the detection results of physiological data based on the acquired electrical signals.

[0013] By controlling the optical components to adjust the propagation direction of the detection light, more detection light can be incident on the detection point, and more light from the detection point can be received by the photodetector. This detection device has higher energy utilization efficiency, and the detection results output by the detection device can more accurately and realistically reflect the physiological state of the detection site.

[0014] Furthermore, by using a single set of light sources and photodetectors, the detection device provided in this application can achieve the same functionality as a detection device containing multiple sets of light sources and / or multiple sets of photodetectors. It can detect detection points at different depths and planar positions, which helps to reduce the size of the detection device and improve its portability. Compared to methods containing multiple sets of light sources and photodetectors, the detection device provided in this technical solution contains fewer electronic components, which helps to reduce the power consumption of the detection device. For rechargeable portable detection devices, this helps to extend the usage time of the detection device.

[0015] Furthermore, compared to adjusting the direction of light propagation through a reflector, this technical solution transmits light through optical devices. The optical devices and the light source (and / or photodetector) are stacked in the direction of the optical axis, allowing the devices within the detection device to be stacked more tightly. This is beneficial for improving the space utilization efficiency within the detection device and reducing its size.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the refractive index of the optical device is adjustable, and / or the shape of the optical device is adjustable, and / or the distance between the optical device and the light source and / or the photodetector is adjustable.

[0017] In one possible implementation, the refractive index of some locations of the optics is adjustable, or the refractive index of all locations of the optics is adjustable.

[0018] In one possible implementation, the shape of some parts of the optical device is adjustable, or the shape of all parts of the optical device is adjustable.

[0019] The shape of an optical device can include the radius of curvature of its incident surface, the radius of curvature of its exit surface, and the thickness of the optical device.

[0020] As an example, the focal length of an optical device is adjustable.

[0021] In one possible implementation, the control signal is used to adjust one or more of the following: the refractive index of the optics, the shape of the optics, and the distance between the optics and the light source and / or the photodetector;

[0022] In one possible implementation, the optical device may receive a first control signal, which can be used to determine a first refractive index, a first shape, or a first distance between the optical device and a light source and / or a photodetector; the optical device may receive a second control signal, which can be used to determine a second refractive index, a second shape, or a second distance between the optical device and a light source and / or a photodetector.

[0023] By adjusting the propagation direction of the detection light through optical devices with adjustable characteristics such as shape and refractive index, more detection light can be incident on the detection point, and more detection light reflected by the detection point can be received by the photodetector. In other words, the detection device can collect more physiological signals from the detection point and fewer physiological signals from non-detection points. The physiological signals collected by the detection device can more accurately reflect the physiological state of the detection point, and the detection results are more in line with the user's experience.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the optical device includes a superlens.

[0025] In one possible implementation, any one of the following can be adjusted: the refractive index of the superlens, the radius of curvature of the incident surface, the radius of curvature of the exit surface, or the thickness.

[0026] The superlens has a thin and light structure and adjustable performance. The detection device containing the superlens is smaller in size, which is conducive to the miniaturization of the detection device and the electronic device with the detection device installed.

[0027] In conjunction with the first aspect, in some implementations of the first aspect, the optical device includes one or more lenses movable along the optical axis of the optical device.

[0028] In one possible implementation, the optical device includes a movable element, a fixed element, and a light modulation unit. The light modulation unit may include ordinary lenses (convex lenses, concave lenses, etc.) and / or superlenses. The movable element can drive one or more lenses in the light modulation unit to move relative to the fixed element along the optical axis.

[0029] By coordinating movable and fixed components, the position of the optical device or the adjustment of the internal lenses can be achieved, thereby changing the propagation direction of the detection light incident on the optical device upon exit. Compared to solutions that include multiple light sources and photodetectors, the structural components within the detection device containing the optical device are stacked more compactly, which helps to reduce the size of the detection device.

[0030] In conjunction with the first aspect, in some implementations of the first aspect, the control signal is used to adjust the refractive index of the optical device, and / or, the control signal is used to adjust the shape of the optical device, and / or, the control signal is used to adjust the distance between the optical device and the light source and / or the photodetector.

[0031] By controlling the characteristics of optical devices through control signals, thereby changing the propagation path of light, this technical solution is beneficial for achieving efficient control of the detection points of the detection device.

[0032] In conjunction with the first aspect, in some implementations of the first aspect, the optical device is located between the detection point and the light source, and the optical device is used to adjust the propagation direction of the detection light so that the detection light is incident on the detection point; and / or, the optical device is located between the detection point and the photodetector, and the optical device is used to adjust the propagation direction of a first light from the detection point so that the first light is incident on the photodetector, the detection light including the first light.

[0033] In one possible implementation, the first ray includes a portion of the detection ray reflected by the detection point.

[0034] In conjunction with the first aspect, in some implementations of the first aspect, the projection of the light source and / or the photodetector onto a first plane at least partially overlaps with the projection of the optical device onto the first plane, the first plane being perpendicular to the optical axis of the optical device.

[0035] The above scheme can also be understood as follows: the light source and / or photodetector can be stacked with optical devices along the optical axis. This structural scheme is beneficial for achieving a more compact stacking of internal components in the detection device, and for reducing the size of the detection device.

[0036] In one possible implementation, the light source and photodetector can share the same optical device, which also helps to simplify the internal components of the detection device and reduce its size.

[0037] In conjunction with the first aspect, in some implementations of the first aspect, the optical device includes a first device and a second device, the projection of the light source in the first plane at least partially overlaps with the projection of the first device in the first plane, and the projection of the photodetector in the first plane at least partially overlaps with the projection of the second device in the first plane.

[0038] In one possible implementation, the first device and the second device are two independent optical devices. Alternatively, the first device and the second device can be two parts of the same optical device.

[0039] The first device can be used to adjust the propagation direction of the light emitted by the light source so that the light can be incident on the point to be detected. The second device can be used to adjust the light reflected by the detection point so that light with different propagation directions can be incident on the photodetector.

[0040] By setting up an optical device for both the light source and the photodetector, and by controlling each optical device separately to adjust the propagation direction of the light emitted by the light source and the propagation direction of the light reflected by the detection point, the control logic of the detection device can be simplified and the detection efficiency can be improved.

[0041] In conjunction with the first aspect, in some implementations of the first aspect, the detection device further includes a controller electrically connected to the optics and used to send the control signal to the optics.

[0042] When there are multiple optical components, there can be multiple controllers, and the number of controllers can be the same as the number of optical components.

[0043] In conjunction with the first aspect, in some implementations of the first aspect, the detection device further includes a processor for determining physiological data and / or the degree of fit of the detection device based on the detection light.

[0044] In conjunction with the first aspect, in some implementations of the first aspect, the detection device further includes a housing for housing the light source, the photodetector, and the optical components.

[0045] In conjunction with the first aspect, in some implementations of the first aspect, the housing includes at least one window located on the bottom surface and / or sidewall of the housing, the optics facing the window, and the optics located between the light source and the window.

[0046] In conjunction with the first aspect, in some implementations of the first aspect, the detection device is a wearable device.

[0047] In a second aspect, a wearable device is provided, including a housing and a detection device as described in the first aspect and any possible implementation thereof, the detection device being connected to the housing.

[0048] In one possible implementation, the housing is used to contain the detection device.

[0049] In conjunction with the second aspect, in some implementations of the second aspect, the housing includes at least one window located on the bottom surface and / or side wall of the housing, with the optics of the detection device facing the window and located between the light source of the detection device and the window.

[0050] In one possible implementation, the aforementioned window opening location can be provided with a transparent material with a light transmittance greater than a preset threshold to form a light transmission section.

[0051] Because it includes a detection device, wearable devices provide more accurate test results during physiological data detection. The detection device is also relatively smaller, which allows wearable devices to be reduced in size to some extent.

[0052] Thirdly, a detection method is provided, applicable to a detection device in the first aspect and any possible implementation thereof, or applicable to a wearable device in the second aspect and any possible implementation thereof, the method comprising: the light source emitting a first detection light; the photodetector receiving a first light from a first incident point, the first light including light reflected from the first detection light at the first incident point; the photodetector receiving a second light from a second incident point, the second light including light reflected from the first detection light at the second incident point; displaying first information when the area of ​​the light spot in the region where the first incident point is located is greater than a first threshold, the first information indicating poor fit at the first incident point; and / or displaying second information when the area of ​​the light spot in the region where the second incident point is located is less than or equal to the first threshold, the second information indicating good fit at the second incident point.

[0053] In one possible implementation, the detection device (or wearable device) detects the user's wearing action before the light source sends the first detection light.

[0054] In one possible implementation, before the photodetector receives the first light ray from the first incident point, the method further includes: the optical device receiving a first control signal such that the first detection light ray can be incident on the first incident point after passing through the optical device; before the photodetector receives the second light ray from the second incident point, the method further includes: the optical device receiving a second control signal such that the first detection light ray can be incident on the second incident point after passing through the optical device.

[0055] Wherein, the first control signal is used to determine the first refractive index of the optical device, and / or, the first control signal is used to determine the first shape of the optical device, and / or, the first control signal is used to determine the first distance between the optical device and the light source; the second control signal is used to determine the second refractive index of the optical device, and / or, the second control signal is used to determine the second shape of the optical device, and / or, the second control signal is used to determine the second distance between the optical device and the light source.

[0056] The method of identifying the bonding status of the device by detecting the area of ​​the light spot is more efficient than the method of determining the bonding status based on the signal quality of the detection point. This method simplifies the bonding status identification process and improves the bonding status identification efficiency.

[0057] In conjunction with the third aspect, in some implementations of the third aspect, the method further includes: the light source emitting a second detection ray; the photodetector receiving a third ray from the second incident point, the third ray including the ray reflected from the second detection ray at the second incident point; and determining the detection result of the physiological data based on the second detection ray and the third ray.

[0058] When the device is not properly fitted, actively controlling the detection light to be incident on a well-fitted position can reduce the power consumption of the light source; since less data needs to be processed, the photodetector needs to process fewer signals, resulting in higher efficiency in physiological data detection.

[0059] Fourthly, a detection method is provided, applicable to a detection device in the first aspect and any possible implementation thereof, or applicable to a wearable device in the second aspect and any possible implementation thereof, the method comprising: acquiring a first physiological signal from a first point; acquiring a second physiological signal from a second point; determining a detection result of the physiological data based on the first physiological signal and the second physiological signal; wherein the first point and the second point are located in a reference plane, or the projection of the second point in the reference plane at least partially overlaps with the projection of the first point in the reference plane, and the reference plane is perpendicular to the depth direction of the skin tissue.

[0060] When the projections of the first and second points on the reference plane at least partially overlap, and the first and second points are roughly along the depth direction of the skin tissue, the light from these two points contains less noise information, resulting in higher accuracy of the physiological data determined accordingly.

[0061] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the first point is located on the surface of the skin tissue, and the first physiological signal is used to remove motion artifacts.

[0062] The detection device (or wearable device) can detect signals at different depths of skin tissue. Combining the characteristics of superficial and deep signals, the superficial signal is used as a reference signal for motion artifacts. Adaptive motion artifact filtering is performed to obtain a purer arterial signal for use in health characteristic algorithm calculations (such as heart rate), thereby improving the accuracy of exercise heart rate.

[0063] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the physiological data includes blood oxygen content, the first physiological signal is used to indicate capillary blood oxygen content, and the second physiological signal is used to indicate arterial and venous blood oxygen content.

[0064] In conjunction with the fourth aspect, in some implementations of the fourth aspect, a third physiological signal is acquired from a third point, the projection of the third point in the reference plane at least partially overlapping the projection of the first point in the reference plane and / or the projection of the second point in the reference plane; the detection result of determining the physiological data based on the first physiological signal and the second physiological signal includes: determining the detection result of the physiological data based on the first physiological signal, the second physiological signal and the third physiological signal.

[0065] In one possible implementation, this third physiological signal is used to indicate the blood oxygen content of small arteries.

[0066] Optical devices can focus light at different depths in skin tissue to detect light signals at different depths in the same location. By combining this with a polynomial fitting blood oxygenation model, the accuracy of blood oxygenation detection can be improved.

[0067] In conjunction with the fourth aspect, in certain implementations of the fourth aspect, the method includes: the light source emitting a first detection light ray; the photodetector receiving a first light ray from a first incident point, the first light ray including light reflected from the first detection light ray at the first incident point; the photodetector receiving a second light ray from a second incident point, the second light ray including light reflected from the first detection light ray at the second incident point; displaying first information indicating poor adhesion at the first incident point when the area of ​​the light spot in the region where the first incident point is located is greater than a first threshold; and / or displaying second information indicating good adhesion at the second incident point when the area of ​​the light spot in the region where the second incident point is located is less than or equal to the first threshold.

[0068] In one possible implementation, the detection device or wearable device performs the above-mentioned actions before collecting the first physiological signal from the first location or the second physiological signal from the second location.

[0069] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the method further includes: the light source emitting a second detection ray; the photodetector receiving a third ray from the second incident point, the third ray including the ray reflected by the second detection ray through the second incident point; and determining the detection result of the physiological data based on the second detection ray and the third ray.

[0070] When the device is not properly fitted, actively controlling the detection light to be incident on a well-fitted position can reduce the power consumption of the light source; since less data needs to be processed, the photodetector needs to process fewer signals, resulting in higher efficiency in physiological data detection.

[0071] Fifthly, a detection method is provided, applicable to a detection device in the first aspect and any possible implementation thereof, or applicable to a wearable device in the second aspect and any possible implementation thereof, the method comprising: the light source emitting detection light rays; the optics receiving a first control signal, the first control signal being used to determine a first refractive index of the optics, and / or, the first control signal being used to determine a first shape of the optics, and / or, the first control signal being used to determine a first distance between the optics and the light source; the photodetector receiving the first light rays; the optics receiving a second control signal, the second control signal being used to determine a second refractive index of the optics, and / or, the second control signal being used to determine a second shape of the optics, and / or, the second control signal being used to determine a second distance between the optics and the light source; the photodetector receiving a second light ray; and determining a detection result of physiological data based on the detection light rays, the first light rays, and the second light rays; wherein at least one of the first refractive index and the second refractive index, the first shape and the second shape, and the first distance and the second distance are different.

[0072] In one possible implementation, a detection ray propagating in a first direction can be incident on a first detection point, and the ray from the first detection point can be incident on a photodetector; a detection ray propagating in a second direction can be incident on a second detection point, and the ray from the second detection point can be incident on a photodetector.

[0073] By placing the optical components on one side of the light source and adjusting the propagation direction of the light emitted by the light source through the optical components, it is possible to better control the incident light on the location to be detected. In this way, more light from the detection location can be received by the photodetector, and the detection results of the physiological data determined by the detection device (or wearable device) are more accurate.

[0074] A sixth aspect provides a detection method applicable to a detection device in the first aspect and any possible implementation thereof, or applicable to a wearable device in the second aspect and any possible implementation thereof, the method comprising: the light source emitting a detection ray; the optics receiving a third control signal for determining a third refractive index of the optics, and / or, the third control signal for determining a third shape of the optics, and / or, the third control signal for determining a third distance between the optics and the photodetector; the photodetector receiving a third ray; the optics receiving a fourth control signal for determining a fourth refractive index of the optics, and / or, the fourth control signal for determining a fourth shape of the optics, and / or, the fourth control signal for determining a fourth distance between the optics and the photodetector; the photodetector receiving a fourth ray; and determining a detection result of physiological data based on the detection ray, the third ray, and the fourth ray; wherein at least one of the third refractive index and the fourth refractive index, the third shape and the fourth shape, and the third distance and the fourth distance are different.

[0075] In one possible implementation, the third ray originates from the third detection point, and its propagation direction is adjusted to the third propagation direction after it is incident on the optical device; the fourth ray originates from the fourth detection point, and its propagation direction is adjusted to the fourth propagation direction after it is incident on the optical device.

[0076] By placing optical components on one side of the photodetector and adjusting the propagation direction of light from the detection point through these optical components, more light from the detection point can be controlled to be received by the photodetector, resulting in higher accuracy of the physiological data determined by the detection device (or wearable device).

[0077] A seventh aspect provides a detection method applicable to a detection device in the first aspect and any possible implementation thereof, or applicable to a wearable device in the second aspect and any possible implementation thereof, the optical component of the wearable device comprising a first device and a second device, the method comprising: the light source emitting a detection ray; the first device receiving a fifth control signal for determining a fifth refractive index of the first device, and / or, the fifth control signal for determining a fifth shape of the first device, and / or, the fifth control signal for determining a fifth distance between the first device and the light source; the second device receiving a seventh control signal for determining a seventh refractive index of the second device, and / or, the seventh control signal for determining a seventh shape of the optical component, and / or, the seventh control signal for determining a seventh distance between the optical component and the photodetector; the photodetector receiving the third ray;

[0078] The first device receives a sixth control signal, which is used to determine a sixth refractive index of the first device, and / or, the sixth control signal is used to determine a sixth shape of the first device, and / or, the sixth control signal is used to determine a sixth distance between the first device and the light source; the second device receives an eighth control signal, which is used to determine a fourth refractive index of the second device, and / or, the eighth control signal is used to determine an eighth shape of the optical device, and / or, the eighth control signal is used to determine an eighth distance between the optical device and the photodetector; the photodetector receives the fourth ray; and the detection result of the physiological data is determined based on the detection ray, the third ray, and the fourth ray; wherein at least one of the fifth and sixth refractive indices, the fifth and sixth shapes, the fifth and sixth distances, the seventh and eighth refractive indices, the seventh and eighth shapes, and the seventh and eighth distances is different.

[0079] In one possible implementation, the detection light propagating along the fifth direction can be incident on the fifth detection point, and the light from the fifth detection point can be incident on the optical device, which then incident on the photodetector along the sixth direction upon exiting; the detection light propagating along the seventh direction can be incident on the seventh detection point, and the light from the seventh detection point can be incident on the optical device, which then incident on the photodetector along the eighth direction upon exiting.

[0080] An optical device is set on one side of the light source and the other side of the photodetector. The propagation direction of the light emitted by the light source and the propagation direction of the light from the detection point are adjusted by the optical device. More detection light can be incident on the position to be detected, and more light from the detection point can be received by the photodetector. The detection results of the physiological data determined by the detection device (or wearable device) are more accurate.

[0081] For detailed explanations and descriptions of the beneficial effects of the following technical solutions, please refer to the relevant content in the first aspect; they will not be repeated hereafter.

[0082] Eighthly, a detection apparatus is provided, comprising: a module for implementing the method of the third aspect and any possible implementation thereof; or a module for implementing the method of the fourth aspect and any possible implementation thereof; or a module for implementing the method of the fifth aspect and any possible implementation thereof; or a module for implementing the method of the sixth aspect and any possible implementation thereof; or a module for implementing the method of the seventh aspect and any possible implementation thereof.

[0083] Ninth aspect, an electronic device is provided, the electronic device including a processor and a memory for storing program instructions, the processor for executing the program instructions to implement: the method in the third aspect and any possible implementation thereof, or the method in the fourth aspect and any possible implementation thereof, or the method in the fifth aspect and any possible implementation thereof, or the method in the sixth aspect and any possible implementation thereof, or the method in the seventh aspect and any possible implementation thereof.

[0084] In a tenth aspect, a computer program product is provided, comprising computer program code that, when executed on a computer, causes the methods in the third aspect and any possible implementation thereof to be executed, or causes the methods in the fourth aspect and any possible implementation thereof to be executed, or causes the methods in the fifth aspect and any possible implementation thereof to be executed, or causes the methods in the sixth aspect and any possible implementation thereof to be executed, or causes the methods in the seventh aspect and any possible implementation thereof to be executed.

[0085] Eleventhly, a computer-readable storage medium is provided that stores computer program code, which, when executed on a computer, causes the method in the third aspect and any possible implementation thereof to be executed, or causes the method in the fourth aspect and any possible implementation thereof to be executed, or causes the method in the fifth aspect and any possible implementation thereof to be executed, or causes the method in the sixth aspect and any possible implementation thereof to be executed, or causes the method in the seventh aspect and any possible implementation thereof to be executed.

[0086] In a twelfth aspect, a chip is provided, including a processor for reading instructions stored in a memory, wherein when the processor executes the instructions, the chip implements the methods of the third aspect and any possible implementation thereof, or implements the methods of the fourth aspect and any possible implementation thereof, or implements the methods of the fifth aspect and any possible implementation thereof, or implements the methods of the sixth aspect and any possible implementation thereof, or implements the methods of the seventh aspect and any possible implementation thereof. Attached Figure Description

[0087] Figure 1 is a schematic diagram of the hardware architecture of an electronic device provided in an embodiment of this application.

[0088] Figure 2 is a schematic diagram of the software architecture of an electronic device provided in an embodiment of this application.

[0089] Figure 3 is a schematic block diagram of a detection device provided in an embodiment of this application.

[0090] Figure 4 is a schematic diagram of the structure of an optical device provided in an embodiment of this application.

[0091] Figure 5 is a schematic diagram of another type of optical device provided in the embodiments of this application.

[0092] Figure 6 is a partial enlarged view of the components of the optical device in Figure 5.

[0093] Figure 7 is a schematic diagram of the arrangement of the light source and photodetector in the detection device provided in the embodiment of this application.

[0094] Figure 8 is a schematic diagram of the arrangement of the light source, photodetector and optical devices in the detection device provided in the embodiment of this application.

[0095] Figure 9 is a schematic diagram of a control method for a detection device provided in an embodiment of this application.

[0096] Figures 10 to 12 are schematic diagrams of a method for detecting a type of physiological data provided in the embodiments of this application.

[0097] Figures 13 to 15 are schematic diagrams of another type of physiological data detection method provided in the embodiments of this application.

[0098] Figures 16 to 18 are schematic diagrams of another type of physiological data detection method provided in the embodiments of this application.

[0099] Figure 19 is a schematic diagram of another physiological data detection method provided in the embodiments of this application.

[0100] Figure 20 is a schematic diagram of the structure of a wearable electronic device provided in an embodiment of this application.

[0101] Figures 21 and 22 are schematic diagrams illustrating the detection principle of the wearing fit of the wearable electronic device provided in the embodiments of this application.

[0102] Figure 23 is a schematic diagram of a detection point setting method provided in an embodiment of this application.

[0103] Figure 24 is a schematic diagram of the detection process for wearing fit provided in an embodiment of this application.

[0104] Figure 25 is a schematic diagram of a physiological data detection principle provided in an embodiment of this application.

[0105] Figure 26 is a schematic diagram of a physiological data detection process provided in an embodiment of this application.

[0106] Figure 27 is a schematic diagram of another physiological data detection principle provided in an embodiment of this application.

[0107] Figure 28 is a schematic diagram of another physiological data detection process provided in an embodiment of this application.

[0108] Figure 29 is a schematic diagram of another physiological data detection principle provided in the embodiments of this application.

[0109] Figure 30 is a schematic diagram of another physiological data detection process provided in an embodiment of this application.

[0110] Figure 31 is a schematic block diagram of a detection device provided in an embodiment of this application.

[0111] Figure 32 is a schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0112] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0113] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two. The term “and / or” is used to describe the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can indicate: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0114] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. In the description of this application, it should be understood that the terms “center,” “longitudinal,” “lateral,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0115] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0116] The methods provided in this application can be applied to electronic devices such as mobile phones, tablets, wearable devices, in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra-mobile personal computers (UMPCs), netbooks, and personal digital assistants (PDAs). This application does not impose any restrictions on the specific type of electronic device.

[0117] For example, Figure 1 shows a schematic diagram of the structure of an electronic device 100. The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, a headphone jack 170D, a sensor module 180, buttons 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, a barometric pressure sensor 180C, a magnetic sensor 180D, an accelerometer sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

[0118] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0119] Processor 110 may include one or more processing units, such as: application processor (AP), modem processor, graphics processing unit (GPU), image signal processor (ISP), controller, memory, video codec, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0120] The controller can be the nerve center and command center of the electronic device 100. The controller can generate operation control signals according to the instruction opcode and timing signals to complete the control of fetching and executing instructions.

[0121] The processor 110 may also include a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory can store instructions or data that the processor 110 has just used or that are used repeatedly. If the processor 110 needs to use the instruction or data again, it can retrieve it directly from the memory. This avoids repeated accesses, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

[0122] In some embodiments, the processor 110 may include one or more interfaces. Interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0123] USB port 130 is a USB standard compliant interface, specifically a Mini USB port, Micro USB port, USB Type-C port, etc. USB port 130 can be used to connect a charger to charge electronic device 100, and can also be used for data transfer between electronic device 100 and peripheral devices. It can also be used to connect headphones for audio playback. This interface can also be used to connect other electronic devices, such as AR devices.

[0124] It is understood that the interface connection relationships between the modules illustrated in the embodiments of this application are merely illustrative and do not constitute a structural limitation on the electronic device 100. In other embodiments of this application, the electronic device 100 may also employ different interface connection methods or combinations of multiple interface connection methods as described in the above embodiments.

[0125] The wireless communication function of electronic device 100 can be implemented through antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, modem processor, and baseband processor.

[0126] Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 can be used to cover one or more communication frequency bands. Different antennas can also be multiplexed to improve antenna utilization. For example, antenna 1 can be multiplexed as a diversity antenna for a wireless local area network. In some other embodiments, the antennas can be used in conjunction with tuning switches.

[0127] The mobile communication module 150 can provide solutions for wireless communication, including 2G / 3G / 4G / 5G, applied to the electronic device 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc.

[0128] The wireless communication module 160 can provide solutions for wireless communication applications on the electronic device 100, including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via antenna 2, performs frequency modulation and filtering of the electromagnetic wave signals, and sends the processed signal to processor 110. The wireless communication module 160 can also receive signals to be transmitted from processor 110, perform frequency modulation and amplification, and convert them into electromagnetic waves for radiation via antenna 2.

[0129] Electronic device 100 implements display functions through a GPU, a display screen 194, and an application processor. The GPU is a microprocessor for image processing, connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations and for graphics rendering. Processor 110 may include one or more GPUs, which execute program instructions to generate or modify display information.

[0130] Display screen 194 is used to display images, videos, etc. Display screen 194 includes a display panel. The display panel may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a miniature LED, a microLED, a quantum dot light-emitting diode (QLED), etc. In some embodiments, electronic device 100 may include one or N displays 194, where N is a positive integer greater than 1.

[0131] Electronic device 100 can perform shooting functions through ISP, camera 193, video codec, GPU, display 194 and application processor.

[0132] An NPU (Neural Processing Unit) is a computational processor for neural networks (NNs). By borrowing the structure of biological neural networks, such as the transmission patterns between neurons in the human brain, it can rapidly process input information and continuously learn on its own. NPUs enable intelligent cognitive applications in electronic devices, such as image recognition, facial recognition, speech recognition, and text understanding.

[0133] The external storage interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 100. The external memory card communicates with the processor 110 through the external storage interface 120 to perform data storage functions. For example, music, video, and other files can be saved on the external memory card.

[0134] Internal memory 121 can be used to store computer executable program code, which includes instructions. Processor 110 executes various functional applications and data processing of electronic device 100 by running the instructions stored in internal memory 121. Internal memory 121 may include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback, image playback, etc.), etc. The data storage area may store data created during the use of electronic device 100 (such as audio data, phonebook, etc.). Furthermore, internal memory 121 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, universal flash storage (UFS), etc.

[0135] Electronic device 100 can implement audio functions, such as music playback and recording, through audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone jack 170D, and application processor.

[0136] The audio module 170 is used to convert digital audio information into analog audio signals for output, and also to convert analog audio input into digital audio signals. The audio module 170 can also be used for encoding and decoding audio signals. In some embodiments, the audio module 170 may be located in the processor 110, or some functional modules of the audio module 170 may be located in the processor 110.

[0137] Buttons 190 include a power button, volume buttons, etc. Buttons 190 can be mechanical buttons or touch-sensitive buttons. Electronic device 100 can receive button input and generate key signal inputs related to user settings and function control of electronic device 100.

[0138] The software system of electronic device 100 can adopt a layered architecture, event-driven architecture, microkernel architecture, microservice architecture, or cloud architecture. This application embodiment uses the layered architecture Android system as an example to exemplify the software structure of electronic device 100.

[0139] Figure 2 is a software structure block diagram of an electronic device 100 according to an embodiment of this application. The layered architecture divides the software into several layers, each with a clear role and function. Layers communicate with each other through software interfaces. In some embodiments, the Android system is divided into four layers, from top to bottom: the application layer, the application framework layer, the Android runtime and system libraries, and the kernel layer. The application layer may include a series of application packages.

[0140] As shown in Figure 2, the application package may include applications such as camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, and SMS.

[0141] The application framework layer provides application programming interfaces (APIs) and a programming framework for applications in the application layer. The application framework layer includes some predefined functions.

[0142] As shown in Figure 2, the application framework layer may include a window manager, content provider, view system, phone manager, resource manager, notification manager, etc.

[0143] The window manager is used to manage windowed applications. It can retrieve screen size, determine the presence of a status bar, lock the screen, and capture screenshots, among other things.

[0144] Content providers store and retrieve data, making that data accessible to applications. This data may include videos, images, audio, made and received phone calls, browsing history and bookmarks, phone books, etc.

[0145] A view system includes visual controls, such as controls for displaying text and controls for displaying images. View systems can be used to build applications. A display interface can consist of one or more views. For example, a display interface including a text notification icon could include views for displaying text and views for displaying images.

[0146] The phone manager is used to provide communication functions for electronic device 100. For example, it manages call status (including connection and disconnection).

[0147] The file explorer provides applications with various resources, such as localized strings, icons, images, layout files, video files, and more.

[0148] The notification manager allows applications to display notifications in the status bar. These notifications can be used to deliver informational messages and can disappear automatically after a short pause, requiring no user interaction. For example, the notification manager can be used to notify users of completed downloads or message alerts. The notification manager can also display notifications as icons or scrolling text in the top status bar, such as notifications from background applications, or as dialog boxes on the screen. Examples include displaying text messages in the status bar, emitting sounds, vibrating electronic devices, and flashing indicator lights.

[0149] The Android runtime consists of core libraries and a virtual machine. The Android runtime is responsible for scheduling and managing the Android system.

[0150] The core library consists of two parts: one part is the functionalities that need to be called by the Java language, and the other part is the Android core library.

[0151] The application layer and application framework layer run in a virtual machine. The virtual machine executes the Java files of the application layer and application framework layer as binary files. The virtual machine is used to perform functions such as object lifecycle management, stack management, thread management, security and exception management, and garbage collection.

[0152] System libraries can include multiple functional modules. For example: surface manager, media libraries, 3D graphics processing libraries (e.g., OpenGL ES), 2D graphics engines (e.g., SGL), etc.

[0153] The Surface Manager is used to manage the display subsystem and provides the blending of 2D and 3D layers for multiple applications.

[0154] The media library supports playback and recording of various common audio and video formats, as well as still image files. It supports multiple audio and video encoding formats, such as MPEG4, H.264, MP3, AAC, AMR, JPG, and PNG.

[0155] The 3D graphics processing library is used to implement 3D graphics drawing, image rendering, compositing, and layer processing.

[0156] A 2D graphics engine is a graphics engine for 2D drawing.

[0157] The kernel layer is the layer between hardware and software. The kernel layer contains at least the display driver, camera driver, audio driver, and sensor driver.

[0158] It should be understood that the technical solutions in the embodiments of this application can be used in systems such as Android, iOS, and HarmonyOS.

[0159] This application provides a detection device 10 that can adjust the propagation direction of the detection light, allowing more light to interact with the detection site. More light from the detection site can be received and used to determine the detection results of physiological data. The physiological data detected by the detection device 10 can more accurately and realistically reflect the physiological state of the detection site.

[0160] In some examples, the detection device 10 may include a light source 12 and a photodetector (PD) 14.

[0161] Light source 12 can be used to emit light of one or more wavelengths, such as green light, infrared light, red light, etc., which can be used to detect physiological data signals (such as pulse wave signals). The light emitted by light source 12 will be referred to as detection light. The detection light after entering the skin tissue may be scattered, refracted, reflected, etc. It can be understood that the light after being scattered, refracted, and reflected by the skin tissue is still part of the detection light.

[0162] As an example, the light source can be a light-emitting diode (LED) or a laser collimator; in other words, the detection light emitted by the light source can be scattered light or collimated light. This application does not impose any limitations on this.

[0163] The photodetector 14 can be used to receive and detect light rays and convert the received light signals into electrical signals.

[0164] Typically, a beam of light emitted by the light source 12 can contain light rays with different propagation directions. When these rays directly incident on the skin tissue, the incident points of the light rays with different propagation directions on the skin tissue may be different. The reflection angle of the incident light rays at different points will vary, which causes the propagation direction of the light rays exiting from different points to be different. When the positions of the photodetector 14 and the light source 12 are relatively fixed, only a portion of the light rays emitted by the light source 12 with different propagation directions can enter the photodetector 14 after reflection at different detection points for purposes such as determining physiological data. In this case, the accuracy of the detection result determined by the detection device 10 based on the light received by the photodetector 14 may not be high.

[0165] In some examples, the detection device 10 may also include an optical element 20 and a controller 16. The optical element 20 may be used to transmit light emitted from the light source 12 and / or light after passing through the detection point. The optical element 20 may also be used to adjust the propagation direction of the light emitted from the light source 12 and the propagation direction of the light after passing through the detection point, so that more of these lights can be incident on the photodetector 14. The controller 16 may be used to control the optical element 20 to achieve the aforementioned functions.

[0166] Here, the use of optical device 20 for transmitting light can be understood as follows: light enters through a first surface of optical device 20 and exits through a second surface opposite to the first surface. Specifically, detection light can enter through the side of optical device 20 facing the light source 12 and exit through the side of optical device 20 away from the light source 12. And / or, detection light can enter through the side of optical device 20 away from the photodetector 14 and exit through the side of optical device 20 facing the photodetector 14.

[0167] Furthermore, compared to adjusting the propagation direction of light through a reflector, by transmitting light through the optical device 20, the optical device 20 and the light source 12 (and / or photodetector 14) can be stacked in the optical axis direction, and the devices in the detection device 10 can be stacked more tightly, which is beneficial to improving the space utilization efficiency within the detection device, reducing the size of the detection device, and improving the portability of the detection device 10.

[0168] In some examples, the refractive index of the optical device 20 is adjustable, or in other words, the propagation direction of the detection light incident on the optical device 20 when it exits can be changed by adjusting the refractive index of the optical device 20.

[0169] For example, the refractive index of the optical device 20 can change under the influence of one or more of the following: electric field, magnetic field, temperature field, stress field, etc.

[0170] As a result, the refractive index of the material constituting the optical device 20 can change under the action of an applied electric field, or in other words, the material constituting the optical device 20 exhibits an electro-optic effect. For example, the optical device 20 can be composed of one or more of the following materials: lithium niobate, potassium dihydrogen phosphate, potassium dideuterium phosphate, gallium arsenide, liquid crystal materials, ferroelectric materials such as barium titanate, nonlinear optical glass, etc.

[0171] As a result, the refractive index of the material constituting the optical device 20 can change under the influence of an external magnetic field, or in other words, the material constituting the optical device 20 exhibits a magneto-optical effect. For example, the optical device 20 can be composed of one or more of the following materials: rare earth iron, ferrite materials, semiconductor materials such as indium arsenide and gallium arsenide, magnetic metals and their alloys such as iron, cobalt, and nickel, magneto-optical glass, metamaterials, magneto-optical crystals, etc.

[0172] As a result, the refractive index of the material constituting the optical device 20 can change with temperature, or in other words, the material constituting the optical device 20 has a thermo-optical effect. For example, the optical device 20 can be composed of one or more of the following materials: glass and optical crystals such as silicate glass and fluoride glass; semiconductor materials and liquid crystal materials such as silicon and gallium arsenide; ceramic materials such as yttrium aluminum garnet; metal oxide thin films such as titanium dioxide; metamaterials (a type of artificial material whose structure can adjust the properties of light and electromagnetic waves); etc.

[0173] As a result, the refractive index of the material constituting the optical device 20 can change under mechanical stress, or in other words, the material constituting the optical device 20 exhibits an elasto-optic effect. For example, the optical device 20 can be composed of one or more of the following materials: glass or crystals such as quartz and borate glass; polymer materials and liquid crystal materials such as polycarbonate and acrylic resins; semiconductor materials such as silicon and gallium arsenide; metal oxide thin films and metamaterials such as indium tin oxide; and piezoelectric crystals such as lithium niobate.

[0174] In some examples, the shape of the optics 20 is adjustable. In other words, the propagation direction of the detection light incident on the optics 20 upon exiting can be changed by adjusting the shape of the optics 20.

[0175] For example, the shape of the optical device 20 may include the radius of curvature and / or thickness of the surface, at least one of which may change under the influence of one or more electric fields, magnetic fields, temperature fields, stress fields, etc.

[0176] Here, the surface of the optical device 20 includes an incident surface and an exit surface for light rays. The radius of curvature of the aforementioned surface may include the radius of curvature of the incident surface and / or the radius of curvature of the exit surface of the optical device 20. The thickness of the optical device 20 may include the distance between the intersection of the incident surface and the optical axis and the intersection of the exit surface and the optical axis.

[0177] Here's a brief explanation of the optical axis: The optical axis is an imaginary line in an optical system that defines how the system transmits light. In some scenarios, the optical axis can be the axis of symmetry of the optical system.

[0178] As a result, the optical device 20 can be made of an elastic material. When an external force stretches or compresses the optical device 20 along a direction perpendicular to its optical axis, the shape of the incident surface and / or the shape of the exit surface of the optical device 20 will change, thereby altering the radius of curvature of the incident surface, the radius of curvature of the exit surface, and the thickness of the optical device 20. For example, the optical device 20 can be composed of one or more of the following materials: polymethyl methacrylate, polycarbonate, silicone, epoxy resin, etc.

[0179] As a result, the optical device 20 can be composed of an electrostrictive material. When the electric field acting on the optical device 20 is changed, the shape of the incident surface and / or the exit surface of the optical device 20 will change, thereby altering the radius of curvature of the incident surface, the radius of curvature of the exit surface, and the thickness of the optical device 20. For example, the optical device 20 can be composed of one or more of the following materials: polyvinylidene fluoride and its copolymers, silicone rubber, acrylates, electroactive polymers, etc.

[0180] As a result, the optical device 20 can be composed of a magnetostrictive material. When the magnetic field acting on the optical device 20 is changed, the shape of the incident surface and / or the shape of the exit surface of the optical device 20 will change, and the radius of curvature of the incident surface, the radius of curvature of the exit surface, and the thickness of the optical device 20 can be changed accordingly. For example, the optical device 20 can be composed of one or more of the following materials: iron-gallium alloy, iron-cobalt-vanadium alloy, terbium-dysprosium-iron alloy, etc.

[0181] As a result, the optical device 20 can be composed of a thermodeformable material. When the temperature field acting on the optical device 20 is changed, the shape of the incident surface and / or the shape of the exit surface of the optical device 20 will change, and the radius of curvature of the incident surface, the radius of curvature of the exit surface, and the thickness of the optical device 20 can be changed accordingly. For example, the optical device 20 can be composed of one or more of the following materials: shape memory polymer, liquid crystal elastomer, shape memory alloy, etc.

[0182] Optical device 20 may include a plane mirror, a convex mirror or a concave mirror, and this application does not limit it; optical device 20 may also include a reflector or a lens, and this application does not limit it either.

[0183] As an example, the focal length of the optical element 20 can be changed by adjusting the refractive index and / or shape of the optical element 20.

[0184] Typically, the focal length of the optical element 20 can be determined according to the following lensmaker's equation:

[0185] Where f is the focal length of optical device 20; n is the refractive index of the constituent material of optical device 20; n m R1 is the refractive index of the material surrounding the optical device 20; R2 is the radius of curvature of the surface of the optical device 20 closest to the light source 12 (incident surface); R2 is the radius of curvature of the surface of the optical device 20 furthest from the light source 12 (exit surface); and d is the thickness of the optical device.

[0186] For example, optical device 20 can be a lens, where f is the focal length of the lens, n is the refractive index of the lens, and n m R1 is the refractive index of the material surrounding the lens, R2 and R1 are the radii of curvature of the two surfaces of the lens, and d is the distance between the two surfaces on the optical axis.

[0187] It should be noted that when the surface of the lens converges light, the radius of curvature of the surface can be positive; when the surface of the lens diverges light, the radius of curvature of the surface can be negative; and when the surface of the lens is flat, the radius of curvature of the surface can be infinite.

[0188] According to the above equations, when the refractive index n of the optical device 20 increases, the focal length f of the optical device 20 decreases. When the radius of curvature R1 of the incident surface of the optical device 20 increases, the focal length f of the optical device 20 increases. Similarly, when the radius of curvature R2 or the thickness d of the exit surface of the optical device 20 changes, the focal length f of the optical device 20 will also change accordingly.

[0189] A change in the focal length f of the optical device 20 means a change in the propagation direction of the light rays incident on the optical device 20 upon exiting. In other words, the propagation direction of the incident light rays can be changed by adjusting one or more of the refractive index, the radius of curvature of the surface, and the thickness of the optical device 20.

[0190] In some examples, one or more lenses included in the optical device 20 may be movable along the optical axis.

[0191] For example, the optical device 20 includes at least one lens, the distance between which is adjustable from the aforementioned light source 12 and / or photodetector 14. In other words, by adjusting the distance between the lens in the optical device 20 and the light source 12 and / or photodetector 14, the propagation direction of the light incident on the optical device 20 upon exiting can be changed.

[0192] As a result, the lens of the optical device 20 can be fixed on a movable part, which can move the lens closer to or away from the light source 12 and / or the photodetector 14.

[0193] For example, the optical device 20 includes at least two lenses, the distance between which is adjustable. In other words, by adjusting the distance between the two lenses within the optical device 20, the propagation direction of light incident on the optical device 20 upon exiting can be changed.

[0194] For example, in the optical device 20, one of the two lenses is fixed, and the other can be connected to a movable component that can move the fixed lens closer to or away from the other lens.

[0195] As an example, the focal length of the optical device 20 can be changed by adjusting the distance between the two lenses within the optical device 20.

[0196] Typically, the equivalent focal length of the optical device 20, including lens 1 and lens 2, can be determined using the following formula:

[0197] Where f is the equivalent focal length of optical device 20; f1 is the focal length of lens 1 in optical device 20; f2 is the focal length of lens 2 in optical device 20; and L is the distance between lens 1 and lens 2.

[0198] According to the above formula, when the focal length f1 of lens 1 or the focal length f2 of lens 2 changes, the equivalent focal length f of optical device 20 will change accordingly. When the distance L between lens 1 and lens 2 changes, the equivalent focal length f of optical device 20 will also change.

[0199] A change in the equivalent focal length f of the optical device 20 means a change in the propagation direction of the light rays incident on the optical device 20 upon exiting. In other words, the propagation direction of the incident light rays can be changed by adjusting the focal lengths of different lenses within the optical device 20 and the distance between two lenses.

[0200] By adjusting the propagation direction of the detection light through optical devices with adjustable characteristics such as shape and refractive index, the portion of the detection light that could not originally reach the detection point can now also reach the detection point after adjustment. More detection light reflected from the detection point can be received by the photodetector 14. In other words, the detection device 10 can collect more physiological signals from the detection point and fewer physiological signals from non-detection points. The physiological signals collected by the detection device 10 can more accurately reflect the physiological state of the detection site, and the detection results are more in line with the user's experience.

[0201] The light emitted by the light source 12 can act on more detection points, resulting in higher energy utilization efficiency of the detection device 10. In addition, the detection device 10, which includes optical components 20, can realize the functions of multiple light sources and photodetectors (this will be described in detail below), which to some extent helps to simplify the structure of the detection device 10 and reduce its size.

[0202] Figure 4 provides an exemplary structure of an optical device 20A. In some scenarios, the optical device 20A may also be referred to as a superlens, metamaterial lens, metastructure lens, etc.

[0203] Here's a brief explanation of a metalens: A metalens is an optical device based on metasurface technology. A metasurface is a two-dimensional material layer composed of artificial structural units (often called "superatoms" or "metaatoms") with subwavelength dimensions. These structural units can precisely control the phase, amplitude, and polarization characteristics of incident light.

[0204] In some examples, the optical device 20A may include a light modulation layer 24 and an input layer 22. The light modulation layer 24 may be used to adjust the propagation direction of light incident on the optical device 20A, and the input layer 22 may be used to receive signals from external circuitry (e.g., a controller). The input layer 22 may also be used to generate different electric fields, magnetic fields, temperature fields, and stress fields according to the received signals. These electric fields, magnetic fields, temperature fields, and stress fields may adjust the refractive index and / or shape of the light modulation layer 24.

[0205] In some examples, the light modulation layer 24 may be composed of one or more of the following materials: materials with electro-optic effects, materials with magneto-optic effects, materials with thermo-optic effects, or materials with elasto-optic effects, etc.

[0206] In some examples, the light adjustment layer 24 may be composed of one or more of the following materials: elastic material, electrostrictive material, magnetostrictive material, thermodeformable material, etc.

[0207] For a detailed description of the materials that make up the light adjustment layer 24, please refer to the relevant content about the materials that make up the optical device 20 mentioned above, which will not be repeated here.

[0208] When the light modulation layer 24 includes a material with an electro-optic effect, the aforementioned input layer 22 can generate a corresponding electric field based on the received signal; when the light modulation layer 24 includes a material with a magneto-optic effect, the aforementioned input layer 22 can generate a corresponding magnetic field based on the received signal; when the light modulation layer 24 includes a material with a thermo-optic effect, the aforementioned input layer 22 can generate a corresponding temperature field based on the received signal; when the light modulation layer 24 includes a material with an elastic-optic effect, the aforementioned input layer 22 can generate a corresponding stress field based on the received signal.

[0209] Alternatively, if the light modulation layer 24 includes an electrostrictive material, the aforementioned input layer 22 can generate a corresponding electric field based on the received signal; if the light modulation layer 24 includes a magnetostrictive material, the aforementioned input layer 22 can generate a corresponding magnetic field based on the received signal; if the light modulation layer 24 includes a thermodeformable material, the aforementioned input layer 22 can generate a corresponding temperature field based on the received signal; or if the light modulation layer 24 includes an elastic material, the aforementioned input layer 22 can generate a corresponding stress field based on the received signal.

[0210] In one possible example, the input layer 22 may include two separate parts (input layer 22A and input layer 22B), and the light modulation layer 24 may be located between these two parts. Alternatively, the light modulation layer 24, the input layer 22A, and the input layer 22B may be stacked along the optical axis of the optical device 20A, and the input layer 22A and the input layer 22B may be located on opposite sides of the light modulation layer 24.

[0211] In another possible example, the input layer 22 may consist of only the input layer 22A (or input layer 22B), and the light adjustment layer 24 may be stacked with the input layer 22A along the optical axis of the optics 20A.

[0212] In some examples, the input layer 22 may have an interface 26 for receiving signals in the thickness direction. Exemplarily, there may be multiple interfaces 26, which may be evenly distributed around the outer periphery of the input layer 22.

[0213] For example, the input layer 22 can be used to form an electric field. In this case, the interface 26 of the aforementioned input layer 22 can be an electrode that can receive voltage input from an external circuit. The input layer 22 can be made of a conductive material. When two separate parts of the input layer 22 receive different voltages, an electric field can be formed between these two parts, and the light modulation layer 24 located between these two parts can be situated within this electric field.

[0214] For example, the input layer 22 can be used to generate a magnetic field. In this case, the input layer 22 can be a ring conductor, and the interface 26 of the input layer 22 can be an electrode. The input layer 22 can receive current input through the electrode. When both separate parts of the input layer 22 receive a changing current input, a magnetic field can be formed between these two parts, and the light modulation layer 24 located between these two parts can be within this magnetic field.

[0215] For example, the input layer 22 can be used to form a temperature field. In this case, the input layer 22 can be composed of a conductive material with a certain resistance. When current is input to the input layer 22 through the interface 26 of the input layer 22, the input layer 22 can generate heat and thus rise in temperature. By controlling the formation of a certain temperature difference between the two separated parts of the input layer 22, a temperature field can be generated between these two parts, and the light modulation layer 24 located between these two parts can be within this temperature field.

[0216] For example, the input layer 22 can be used to create a stress field; in this case, the input layer 22 can be composed of an electrostrictive material. When current is input to the input layer 22 through the interface 26, the material comprising the input layer 22 can deform perpendicular to the optical axis. The side of the light modulation layer 24 closest to the input layer 22 can be fixedly connected to the input layer 22, and the deformation of the input layer 22 can cause the light modulation layer 24 to deform. Depending on the distance from the input layer 22, the deformation of different parts of the light modulation layer 24 is different, and correspondingly, the internal stress of different parts is also different. In other words, the light modulation layer 24 can be situated within the stress field induced by the input layer 22.

[0217] The refractive index, shape, and other properties of the light modulation layer 24, which is situated within an electric field, magnetic field, temperature field, or stress field, are altered by these fields. For non-uniform electric, magnetic, temperature, or stress fields, different parts of the light modulation layer 24 are affected differently, resulting in variations in their properties (e.g., refractive index, thickness, surface radius of curvature). Based on this, the refractive index and shape of the light modulation layer 24 can be controlled and adjusted, thereby altering the propagation direction of the detection light incident on the optical device 20A. In other words, by controlling the distribution of the electric, magnetic, temperature, or stress fields within the optical device 20A, the refractive index and shape (thickness, surface radius of curvature) of different parts of the optical device 20A can be adjusted, thus controlling the propagation direction of light passing through different parts of the optical device 20A.

[0218] In some examples, the optical device 20A may also include a bracket 28, which can be used to fix the aforementioned input layer 22 and light modulation layer 24. Exemplarily, the bracket 28 may wrap around the outer periphery of the aforementioned light modulation layer 24 and input layer 22 in a direction perpendicular to the optical axis and be fixed relative to the light modulation layer 24 and input layer 22.

[0219] Alternatively, the bracket 28 can be part of the housing of the electronic device on which the detection device 10 is mounted; or the bracket 28 can be the housing of the optical device 20A, which can be mounted on the electronic device via the bracket 28.

[0220] The optical device 20A has a thin and light structure and adjustable performance. The detection device 10 containing the optical device 20A is smaller in size, which is conducive to miniaturization of the detection device 10 and the electronic equipment on which the detection device 10 is installed.

[0221] Figure 5 shows the structure of another type of optical device 20B provided in the embodiments of this application.

[0222] In some examples, the optical device 20B may include a movable member 32, a fixed member 34, or a light modulation section 36. The movable member 32 can move relative to the fixed member 34 along the optical axis of the optical device 20B, and part or all of the light modulation section 36 can be fixedly connected to the movable member 32. During the movement of the movable member 32, a portion of the light modulation section 36 fixedly connected to the movable member 32 also moves along the optical axis.

[0223] For example, the light modulation unit 36 ​​described above may include one or more optical devices 20A, whose refractive index and / or shape can be changed under the action of an applied electric field, magnetic field, etc.

[0224] For example, the light modulation unit 36 ​​may include one or more lenses, such as convex lenses, concave lenses, Fresnel lenses, etc.

[0225] In some examples, referring to schematic diagram 5-1 in Figure 5, the outer periphery of the light modulation section 36 can be fixedly connected to the movable member 32; in other words, the movable member 32 can be sleeved on the outer periphery of the light modulation section 36; the fixed member 34 can be sleeved on the outer periphery of the movable member 32. As the movable member 32 moves along the optical axis, the light modulation section 36 can move closer to or further away from the light source along the direction of the optical axis.

[0226] In some examples, referring to schematic diagram 5-2 in Figure 5, the outer periphery of sub-part 36A of the light modulation unit 36 ​​can be fixedly connected to the movable member 32, and the outer periphery of sub-part 36B of the light modulation unit 36 ​​can be fixedly connected to the fixed member 34. The fixed member 34 can be sleeved on the outer periphery of the movable member 32. Sub-parts 36A and 36B can be arranged along the optical axis. During the movement of the movable member 32 along the optical axis, sub-part 36A can move closer to or further away from sub-part 36B.

[0227] Figure 6 shows schematic diagrams of several ways in which the movable part 32 and the fixed part 34 can be coupled. In some examples, at least one of the movable part 32 and the fixed part 34 includes a guide structure extending along the optical axis, which can be a guide post, a guide groove, or a guide rail, etc.

[0228] Referring to schematic diagram 6-1 in Figure 6, the side of the fixed member 34 facing the movable member 32 may include a guide post 34-1, and the side of the movable member 32 facing the fixed member 34 may include a guide groove 32-1 corresponding to the aforementioned guide post 34-1. When the movable member 32 and the fixed member 34 are assembled together, the guide post 34-1 can be accommodated in the guide groove 32-1. Both the guide post 34-1 and the guide groove 32-1 can extend along the optical axis (or in other words, the guiding direction of the guide post 34-1 and the guide groove 32-1 is the same as the optical axis), thereby allowing the movable member 32 to move along the optical axis.

[0229] Referring to schematic diagram 6-2 in Figure 6, the side of the fixed member 34 facing the movable member 32 may include a guide groove 34-2, and the side of the movable member 32 facing the fixed member 34 may include a guide post 32-2 corresponding to the aforementioned guide groove 34-2. When the movable member 32 and the fixed member 34 are assembled together, the guide post 32-2 can be accommodated in the guide groove 34-2. Both the guide post 32-2 and the guide groove 34-2 can extend along the optical axis, thereby allowing the movable member 32 to move along the optical axis.

[0230] Referring to schematic diagram 6-3 in Figure 6, the side of the fixed member 34 facing the movable member 32 may include a guide groove 34-3, and the side of the movable member 32 facing the fixed member 34 may include a guide groove 32-3 corresponding to the aforementioned guide groove 34-3. When the movable member 32 and the fixed member 34 are assembled together, the guide grooves between them are opposite each other. One or more structures such as balls, rollers, and wheels can be accommodated in the guide grooves 32-3 and 34-3, and these balls, rollers, and wheels can respectively abut against the bottom surfaces of the two oppositely arranged guide grooves. When the balls, etc., roll in the guide grooves, the movable member 32 can move along the optical axis.

[0231] In some examples, the mounting member 34 of the optical device 20B can be part of the electronic device housing; or, the mounting member 34 can serve as the housing of the optical device 20B, through which the optical device 20B can be mounted on the electronic device.

[0232] In some examples, the optical device 20B described above may also include a drive element that can be connected to the movable element 32 and is used to drive the movable element 32 to move along the optical axis. As an example, the drive element may be one or more of a voice coil motor, a stepper motor, a shape memory alloy motor, etc., and this application does not limit it.

[0233] By coordinating movable and fixed components, the position of the optical element 20 or the adjustment of the internal lenses of the optical element 20 can be achieved, thereby changing the propagation direction of the detection light incident on the optical element 20B upon exit. Compared to schemes that include multiple light sources and photodetectors, the structural components within the detection device including the optical element 20B are stacked more compactly, which helps to reduce the size of the detection device.

[0234] The detection device 10 provided in this application may include one or more light sources 12, and may also include one or more photodetectors 14. When there are multiple light sources 12 and / or photodetectors 14, their arrangement is not limited in this application. Figure 7 provides several exemplary arrangements of the light sources 12 and photodetectors 14.

[0235] For example, the distance between the light source and the photodetector can meet a preset threshold.

[0236] For example, as shown in schematic diagram 7-1 of Figure 7, the detection device 10 may include a light source (LED as an example in the figure) and a photodetector (PD). The distance between the light source and the photodetector is d1, which satisfies the condition that it is greater than or equal to L1 and less than or equal to L2 (L2 is greater than L1). For example, L1 can be 1.5 mm, L2 can be 8.5 mm, and d1 can be 2 mm, 4 mm, 6 mm, 8 mm, etc.

[0237] It is understandable that, since the detection device 10 includes optical components that can adjust the direction of light propagation, the distance between the light source and the photodetector can have a wider range of settings. Therefore, the detection device 10 can be applied to a wider variety of electronic devices of different sizes. In other words, the same detection device 10 can be applied to electronic devices of various types (such as headphones, wristbands, watches, etc.).

[0238] For example, when the detection device 10 includes multiple light sources, the distance between each light source and the same photodetector may be the same or different.

[0239] For example, as shown in schematic diagram 7-2 of Figure 7, the detection device 10 may include two light sources (LED1 and LED2) and a photodetector (PD). The distance between the photodetector PD and the light source LED1 is d21, and the distance between the photodetector PD and the light source LED2 is d22. Here, the distances d21 and d22 can be different, and both distances d21 and d22 can satisfy the condition that they are greater than or equal to L1 and less than or equal to L2. For example, L1 can be 1.5 mm, L2 can be 8.5 mm, and d21 and d22 can be 2 mm, 4 mm, 6 mm, 8 mm, etc.

[0240] For example, as shown in schematic diagram 7-3 of Figure 7, the detection device 10 may include three light sources (LED1, LED2, and LED3) and a photodetector (PD). The distance between the photodetector PD and the light source LED1 is d31, the distance between the photodetector PD and the light source LED2 is d32, and the distance between the photodetector PD and the light source LED3 is d33. Here, distances d31, d32, and d33 can be different, and all distances d31, d32, and d33 can satisfy the condition that they are greater than or equal to L1 and less than or equal to L2. For example, L1 can be 1.5 mm, L2 can be 8.5 mm, and d31, d32, and d33 can be 2 mm, 4 mm, 6 mm, 8 mm, etc.

[0241] For example, when the detection device 10 includes multiple photodetectors, the distance between each photodetector and the same light source may be the same or different.

[0242] For example, as shown in schematic diagram 7-4 of Figure 7, the detection device 10 may include three light sources (LED1, LED2, and LED3) and two photodetectors (PD1 and PD2). The distances between photodetector PD1 and light source LED1, between light sources LED2, and between light sources LED3 are d41, d42, and d43, respectively. The distances between photodetector PD2 and light sources LED1, LED2, and LED3 are d44, d45, and d46, respectively. Here, any two of the distances d41, d42, d43, d44, d45, and d46 can be the same or different, and their values ​​can all satisfy the condition that they are greater than or equal to L1 and less than or equal to L2. For example, L1 can be 1.5 mm, L2 can be 8.5 mm, and d41 to d46 can be 2 mm, 4 mm, 6 mm, 8 mm, etc.

[0243] The detection device 10 provided in this application may include one or more optical devices 20. FIG8 provides an exemplary arrangement of the light source 12, photodetector 14 and optical devices 20 in several detection devices 10.

[0244] For example, the optical device 20 can be used to adjust the propagation direction of light emitted by one of the multiple light sources 12. The optical device 20 can also be used to adjust the propagation direction of light emitted by multiple light sources 12. That is, multiple light sources 12 can share the same optical device 20, or each light source 12 can be provided with a separate optical device 20.

[0245] For example, referring to schematic diagram 8-1 in Figure 8, the detection device 10 may include a light source 1, a light source 2, and an optical component, with the light source 1 and light source 2 sharing the optical component. Both light source 1 and light source 2 are connected to a circuit board and spaced apart from each other, with the circuit board stacked on top of the optical component. The projections of light source 1 and light source 2 onto a reference plane may partially or completely overlap with the projection of the optical component onto that reference plane, which may be approximately perpendicular to the optical axis of the optical component. One possibility is that light source 1 and light source 2 can be used to emit light of different wavelengths, and the optical component can adjust the propagation direction of these different wavelengths of light.

[0246] For example, referring to schematic diagram 8-2 in Figure 8, the detection device 10 may include a light source 1, a light source 2, an optical device 1, and an optical device 2. Optical device 1 is used to adjust the propagation direction of the light emitted by light source 1, and optical device 2 is used to adjust the propagation direction of the light emitted by light source 2. Light source 1 and light source 2 are both connected to a circuit board and spaced apart from each other. The circuit board is stacked with optical device 1 and optical device 2. The projection of light source 1 onto a reference plane may partially or completely overlap with the projection of optical device 1 onto the same reference plane, and the projection of light source 2 onto the same reference plane may also partially or completely overlap with the projection of optical device 2 onto the same reference plane. The reference plane may be approximately perpendicular to the optical axis of optical device 1 (or optical device 2). Alternatively, optical device 1 and optical device 2 may be approximately located in the same plane.

[0247] Sharing the same optical device with multiple light sources simplifies the internal components of the detection device and reduces its size. Each light source has its own optical device, and by controlling each optical device separately, the propagation direction of the light emitted by the light source can be efficiently controlled. This allows the photodetector to receive light of the same wavelength emitted by different light sources at the same time, which helps improve the detection efficiency of the detection device.

[0248] For example, the optical device can be used to adjust the propagation direction of light incident on one of the multiple photodetectors, or the optical device can also be used to adjust the propagation direction of light incident on multiple photodetectors. That is, multiple photodetectors can share the same optical device, or each photodetector can be equipped with a separate optical device.

[0249] For example, referring to schematic diagram 8-3 in Figure 8, the detection device 10 may include photodetector 1, photodetector 2, and an optical device, with photodetector 1 and photodetector 2 sharing the optical device. Photodetector 1 and photodetector 2 are both connected to a circuit board and spaced apart from each other, the circuit board being stacked with the optical device. The projections of photodetector 1 and photodetector 2 onto a reference plane may partially or completely overlap with the projection of the optical device onto that reference plane, which may be approximately perpendicular to the optical axis of the optical device. Light rays from different points, after incident on the optical device, have their propagation direction adjusted by the optical device before they can be incident on photodetector 1 and / or photodetector 2.

[0250] For example, referring to schematic diagram 8-4 in Figure 8, the detection device 10 may include a photodetector 1, a photodetector 2, an optical element 1, and an optical element 2. Optical element 1 is used to adjust the propagation direction of light incident on photodetector 1, and optical element 2 is used to adjust the propagation direction of light incident on photodetector 2. Photodetector 1 and photodetector 2 are both connected to a circuit board and spaced apart from each other. The circuit board is stacked with optical element 1 and optical element 2. The projection of photodetector 1 onto a reference plane may partially or completely overlap with the projection of optical element 1 onto the same reference plane, and the projection of photodetector 2 onto the same reference plane may also partially or completely overlap with the projection of optical element 2 onto the same reference plane. The reference plane may be approximately perpendicular to the optical axis of optical element 1 (or optical element 2). Alternatively, optical element 1 and optical element 2 may be approximately located in the same plane.

[0251] Sharing the same optical element among multiple photodetectors simplifies the internal components of the detection device and reduces its size. Each photodetector has its own optical element, and by controlling each optical element separately, different photodetectors can receive light sources of different wavelengths, which improves the detection efficiency of the detection device.

[0252] For example, the optical device can be used to adjust the propagation direction of the light emitted by the light source and / or the propagation direction of the light incident on the photodetector. That is, the light source and the photodetector can share the same optical device, or the light source and the photodetector can each be provided with a separate optical device.

[0253] For example, referring to schematic diagram 8-5 in Figure 8, the detection device 10 may include a light source, a photodetector, and an optical component, with the light source and photodetector sharing the optical component. Both the light source and photodetector are connected to a circuit board and spaced apart from each other; the circuit board is stacked with the optical component. The projections of the light source and photodetector onto a reference plane may partially or completely overlap with the projection of the optical component onto that reference plane, which may be approximately perpendicular to the optical axis of the optical component. After the detection light emitted by the light source is incident on the optical component, the propagation direction of the detection light can be adjusted by the optical component to reach the detection point; the propagation direction of the light reflected from the detection point after incident on the optical component can also be adjusted by the optical component to reach the photodetector.

[0254] For example, referring to schematic diagram 8-6 in Figure 8, the detection device 10 may include a light source, a photodetector, optical element 1, and optical element 2. Optical element 1 is used to adjust the propagation direction of the light emitted by the light source, and optical element 2 is used to adjust the propagation direction of the light incident on the photodetector. The light source and photodetector are both connected to a circuit board and spaced apart from each other. This circuit board is stacked with optical element 1 and optical element 2. The projection of the light source in the reference plane may partially or completely overlap with the projection of optical element 1 in the reference plane, and the projection of the photodetector in the reference plane may partially or completely overlap with the projection of optical element 2 in the reference plane. This reference plane may be approximately perpendicular to the optical axis of optical element 1 (or optical element 2). Alternatively, optical element 1 and optical element 2 may be approximately located in the same plane.

[0255] Sharing the same optical element with the light source and photodetector simplifies the internal components of the detection device and reduces its size. Alternatively, each optical element can be used to control the light source and the light reflected from the detection point, thereby simplifying the control logic of the detection device and improving its detection efficiency.

[0256] Referring to Figure 8, in some examples, shielding structures can be used between two adjacent light sources, between two adjacent photodetectors, and between adjacent light sources and photodetectors. These shielding structures can reduce mutual interference between light emitted from different light sources, reduce interference between light incident on different photodetectors, and reduce interference of light emitted from a light source on light incident on a photodetector.

[0257] In some examples, when the detection device 10 includes multiple optical devices 20, these optical devices 20 can be controlled by the same controller 16. Alternatively, the detection device 10 may include the same number of controllers 16 as the number of optical devices 20, with each controller 16 controlling one optical device. Or, the detection device 10 may include two controllers 16, one controller 16 for controlling the optical device corresponding to the light source 12, and the other controller 16 for controlling the optical device corresponding to the photodetector 16.

[0258] In some examples, the detection device 10 may also include a photoelectric measurement front-end controller, which can be used to drive the light source 12 to emit light and control the photodetector 14 to perform photoelectric conversion on the received light and sample the signal.

[0259] In some examples, the detection device 10 may also include a signal processor that can be used to preprocess the light signal detected by the photodetector, such as noise reduction, filtering, and signal quality judgment.

[0260] Based on the detection device 10 described above, Figure 9 shows a schematic diagram of a system architecture provided in an embodiment of this application.

[0261] An electrical connection line can be provided between the photoelectric measurement front-end controller and the light source 12. Through this electrical connection line, the photoelectric measurement front-end controller can send an electrical signal to the light source 12 to drive the light source 12 to emit detection light.

[0262] An electrical connection can be provided between the controller 16 and the optical device 20C. Through this electrical connection, the controller 16 can send control signals to the optical device 20C to adjust its refractive index, shape, etc. Similarly, an electrical connection can be provided between the controller 16 and the optical device 20D. Through this electrical connection, the controller 16 can send control signals to the optical device 20D to adjust its refractive index, shape, etc.

[0263] The detection light emitted by the light source 12 can be incident on the detection point on the skin tissue after being modulated by the optical device 20C; after being reflected by the detection point, the detection light can be incident on the optical device 20D, and after being modulated by the optical device 20D, it can be incident on the photodetector 14.

[0264] The photoelectric measurement front-end controller can also be connected to the photodetector 14 by an electrical connection line. Through this electrical connection line, the photoelectric measurement front-end controller can send an electrical signal to the photodetector 14 to drive the photodetector 14 to convert the received optical signal into an electrical signal.

[0265] The signal processor can be electrically connected to the photodetector 14 and receive electrical signals from the photodetector 14. The signal processor can perform preprocessing such as noise reduction and filtering on the received electrical signals.

[0266] The central processing system may include a processor (such as processor 110 in Figure 1), and is electrically connected to the photoelectric measurement front-end controller, signal processor, and controller. The electrical signal, pre-processed by the signal processor, is input to the central processing system for further processing and storage, thereby determining the detection results of physiological data such as heart rate and blood oxygen content. The central processing system can control and regulate the photoelectric measurement front-end controller and controller, dynamically adjusting the detection point of the detection light within the skin tissue to acquire signals from detection points at different depths and in different regions.

[0267] In one possible example, the system architecture shown in Figure 9 may include only optical element 20C or optical element 20D. For example, if the detection device 10 has an optical element only on the light source side, then Figure 9 may include only optical element 20C and exclude optical element 20D, and the controller 16 may be used to control optical element 20C. As another example, if the detection device 10 has an optical element only on the photodetector side, then Figure 9 may include only optical element 20D and exclude optical element 20C, and the controller 16 may be used to control optical element 20D.

[0268] In one possible example, optical devices 20C and 20D in Figure 9 can be two separate optical devices. For example, as shown in schematic diagram 8-6 of Figure 8, optical device 20C can be optical device 1 in the schematic diagram, and optical device 20D can be optical device 2 in the schematic diagram.

[0269] In another possible example, optical devices 20C and 20D in Figure 9 can be two different parts of a single optical device. For example, as shown in schematic diagram 8-5 in Figure 8, optical device 20C can be the left part of the optical device in this schematic diagram (the part corresponding to the light source), and optical device 20D can be the right part of the optical device in this schematic diagram (the part corresponding to the photodetector).

[0270] In one possible example, there can be multiple optical devices 20C or 20D in Figure 9. For instance, as shown in schematic diagram 8-2 of Figure 8, there can be two optical devices 20C, each used to adjust the propagation direction of light emitted from two light sources. One of them can be optical device 1 in this schematic diagram, corresponding to light source 1, and the other can be optical device 2 in this schematic diagram, corresponding to light source 2. As another example, as shown in schematic diagram 8-4 of Figure 8, there can be two optical devices 20D, each used to adjust the propagation direction of light so that the light can be incident on two photodetectors respectively. One of them can be optical device 1 in this schematic diagram, corresponding to photodetector 1, and the other can be optical device 2 in this schematic diagram, corresponding to photodetector 2.

[0271] Referring to Figures 10 to 12, based on the detection device 10 described above, this application embodiment provides a method for detecting physiological data. By controlling the propagation direction of the light emitted from the optical device 20, the detection device 10 can collect physiological signals from multiple different locations along the thickness direction of the skin tissue, and / or, the detection device 10 can collect physiological signals from multiple different locations in a plane perpendicular to the thickness direction of the skin tissue. These physiological signals can more accurately reflect the physiological condition of the detection site.

[0272] In Figures 10 and 11, the optical components are positioned close to the light source. In Figure 10, by inputting different control signals to the optical components, the propagation direction of the detection light emitted from the light source can be adjusted, allowing the detection light to strike different depths on the detection area. In Figure 11, by inputting different control signals to the optical components, the propagation direction of the detection light emitted from the light source can be adjusted, allowing the detection light to strike different positions on the same plane of the detection area.

[0273] S101, Light source emits detection light.

[0274] In some examples, the detection light can be scattered light or collimated light, and this application does not limit this. Depending on the physiological data to be detected, the light source can emit detection light of different wavelengths; in other words, the detection light here can include light of one or more wavelengths, and this application does not limit this either.

[0275] S102, the optical device receives the first control signal.

[0276] In some examples, the first control signal is used to determine a first refractive index of the optics; and / or, the first control signal is used to determine a first shape of the optics; and / or, the first control signal is used to determine a first distance between the optics and the light source.

[0277] When the refractive index of the optical device is set to a first refractive index, and / or when the shape of the optical device is a first shape, and / or when the distance between the optical device and the light source is a first distance, the detection light can propagate along a first direction and be incident on the first detection point of the skin tissue when it exits through the optical device.

[0278] For example, the optical device can be the optical device 20A mentioned above, and the first control signal can be used to control the electric field, magnetic field, temperature field and stress field within the optical device 20A to adjust the refractive index and / or shape of the optical device 20A.

[0279] For example, the optical device can be the optical device 20B mentioned above, and the first control signal can be used to control the movement distance of the movable part 32 within the optical device 20B along the optical axis, so as to adjust the distance between the optical device 20B and the light source and / or the distance between the two lenses within the optical device 20B.

[0280] In some examples, the first refractive index mentioned above can indicate the refractive index of a certain part of the optical device, or it can indicate the distribution of the refractive index in different parts of the optical device.

[0281] For example, the optical device can be the optical device 20A mentioned above. The refractive indices of different parts of the optical device 20A can be the same or different. In this case, the first refractive index can indicate the distribution of the refractive index of different parts of the optical device 20A, or it can refer to the refractive index of a certain part of the optical device 20A.

[0282] For example, the optical device can be the optical device 20B mentioned above. The lens included in the optical device 20B can be a convex lens, a concave lens, etc. The optical properties such as the refractive index of different parts of the optical device 20B can be consistent. The first refractive index can indicate the refractive index of a certain part of the optical device, or the first refractive index can also refer to the distribution of the refractive index of different parts of the optical device.

[0283] In some examples, the first shape mentioned above may include the thickness of a portion of the optics, the radius of curvature of the surface, or the distribution of the thickness of different portions of the optics, the radius of curvature of the incident surface, and the radius of curvature of the exit surface.

[0284] For example, the optical device can be the optical device 20A mentioned above. The radii of curvature of the surfaces of different parts of the optical device 20A can be the same or different. In this case, the first shape can include the radii of curvature of the surfaces of different parts of the optical device 20A, or it can include the radii of curvature of the surface of a certain part of the optical device 20A.

[0285] For example, the optical device may be the optical device 20B described above. In this case, the first shape may include the distance between the incident surface and the exit surface of the optical device 20B.

[0286] As an example, the first detection point can be the intersection of some or all of the rays in a beam of light emitted from the optical device. In other words, the optical device can cause the incident detection rays to converge partially or entirely at the first detection point upon exiting.

[0287] As an example, the first detection point can be located in the superficial layer of the skin (such as the epidermis) or the deep layer of the skin (such as the subcutaneous tissue). Alternatively, the first detection point can be located near capillaries, arterioles, arteries, or veins.

[0288] Here's a brief introduction to skin tissue: Generally, skin tissue includes the epidermis (outermost layer of skin), dermis, and subcutaneous tissue. The epidermis is the outermost layer, the dermis lies beneath it, and the subcutaneous tissue lies beneath the dermis. Capillaries are generally located in the dermis, while veins and arteries are generally located beneath the capillaries. Small arteries connecting arteries and capillaries lie between the capillaries and arteries. Oxygen in the blood is transported to the capillaries via arteries and arterioles.

[0289] S103, the photodetector receives the first light from the first detection point.

[0290] After the detection light rays are incident on the first detection point, they may undergo one or more of the following processes: scattering, refraction, transmission, or reflection. Part of the detection light rays reflected by the first detection point can be incident on the photodetector 14, and this part of the light rays can be called the first light ray. In other words, the first light ray is a part of the detection light ray.

[0291] S104, the optical device receives the second control signal.

[0292] In some examples, the second control signal is used to determine the second refractive index of the optics; and / or, the second control signal is used to determine the second shape of the optics; and / or, the second control signal is used to determine the second distance between the optics and the light source.

[0293] When the refractive index of the optical device is set to a second refractive index, and / or when the shape of the optical device is a second shape, and / or when the distance between the optical device and the light source is a second distance, the detection light can propagate along a second direction when it exits through the optical device and is incident on the second detection point of the skin tissue.

[0294] For example, the optical device can be the optical device 20A mentioned above, and the second control signal can be used to control the electric field, magnetic field, temperature field and stress field within the optical device 20A to adjust the refractive index and / or shape of the optical device 20A.

[0295] For example, the optical device can be the optical device 20B mentioned above, and the second control signal can be used to control the movement distance of the movable part 32 within the optical device 20B along the optical axis, so as to adjust the shape of the optical device 20B and / or the distance between it and the light source.

[0296] The second refractive index mentioned above can indicate the refractive index of a certain part of the optical device, or it can indicate the distribution of the refractive index of different parts of the optical device. Similarly, the second shape mentioned above can include the thickness of a certain part of the optical device, the radius of curvature of its surface, or it can include the distribution of the thickness of different parts of the optical device, the radius of curvature of the incident surface, and the radius of curvature of the exit surface. Related content can be found in the preceding introduction to the first refractive index and the first shape, and will not be repeated here.

[0297] In the above text, the second refractive index and the first refractive index may be different, the second shape and the first shape may be different, the second spacing and the first spacing may be different, and based on satisfying at least one of the aforementioned three conditions, the second direction and the first direction are different in the above example.

[0298] As an example, the second detection point is different from the first detection point mentioned above.

[0299] For example, the first and second detection points may be at different depths within the skin tissue. One possibility is that the projections of the first and second detection points onto the reference plane at least partially overlap. In other words, the line connecting the first and second detection points is approximately perpendicular to the reference plane. Referring to Figure 10, the first and second detection points could be detection points P11 and P12, or P11 and P13, or P12 and P13, respectively.

[0300] For example, the first detection point and the second detection point are different points within the detection plane, which is approximately parallel to the aforementioned reference plane. In other words, the line connecting the first detection point and the second detection point is approximately parallel to the reference plane. Referring to Figure 11, the first detection point and the second detection point can be detection point P21 and detection point P22, or detection point P21 and detection point P23, or detection point P22 and detection point P23, respectively.

[0301] As an example, the first and second detection points can be determined based on the physiological data to be detected. Alternatively, the first and second detection points can be adjusted according to changes in the detection scenario.

[0302] For example, in scenarios involving the detection of physiological data such as heart rate or blood oxygen saturation, the first and second detection points can be located at different depths within the skin tissue to obtain signals from different depths to determine the detection results for heart rate or blood oxygen saturation. Detection points P11, P12, and P13 in Figure 10 can serve as an example.

[0303] For example, when detecting the physiological condition of a local area of ​​skin tissue, the first and second detection points can be located within a reference plane of the skin tissue to obtain signals from multiple detection points within that local area to determine the physiological condition of that area. Detection points P21, P22, and P23 in Figure 11 can serve as an example.

[0304] For example, in a scenario where the fit between a wearable device equipped with a detection device and the wearing area is being checked, the first and second detection points can be roughly located on the bottom or sidewall of the wearable device, and they can be on the same plane. Thus, when the wearable device fits well with the wearing area, the areas of the two light spots corresponding to the two detection points on the wearing area are essentially the same; however, when a portion of the wearable device does not fit well with the wearing area, the areas of the two light spots corresponding to the two detection points on the wearing area differ significantly.

[0305] S105, the photodetector receives the second light from the second detection point.

[0306] Similar to the first ray, the second ray is part of the detection ray, including the portion of the detection ray incident on the second detection point that is reflected by the second detection point.

[0307] S106, determine the detection result based on the detection light, the first light, and the second light.

[0308] One possibility is that the above test results are used to indicate whether the wearable device is being worn, or how well it fits the wearable device to the area being worn. A detailed explanation of this scenario can be found in Figures 21 to 23 below.

[0309] Another possibility is that the above detection results are based on the user's physiological data. A detailed explanation of this scenario can be found in Figures 24 to 30 below.

[0310] Understandably, depending on the physiological data to be detected, the methods for determining the physiological data based on the detection light, the first light, and the second light will also differ.

[0311] As an example, the physiological data to be detected could be heart rate. In this case, one of the first and second rays can be used to remove motion artifacts and improve the accuracy of heart rate measurement.

[0312] As an example, the physiological data to be detected can be blood oxygen content. In this case, the detection depth of the first light can be shallower, and the detection depth of the second light can be deeper. The first light can be used to determine the blood oxygen content of capillaries, and the second light can be used to determine the blood oxygen content of arteries / veins.

[0313] It is understandable that the detection light, the first light, and the second light all contain information such as light intensity and waveform. The detection results of determining physiological data based on the detection light, the first light, and the second light can be understood as determining the detection results of physiological data based on the information contained in these light rays.

[0314] It should be noted that the numbering of steps S101, S102, etc., is only used to identify different steps and does not indicate the execution order of the different steps. In some other examples, these steps may be executed in other orders. For example, the optical device first receives the first control signal and / or the second control signal, and then the light source emits the detection light. In other words, steps S102 and / or S104 may be executed before step S101.

[0315] Compared to the case where no optical components are used, and the light emitted by the light source directly strikes different points (including points other than the detection area), this example places the optical components on one side of the light source. By adjusting the propagation direction of the light emitted by the light source through the optical components, more light rays from different propagation directions can strike the location to be detected. This means that more light from the location to be detected can be received by the photodetector, resulting in higher accuracy of the physiological data determined by the detection device. In other words, by placing the optical components on one side of the light source, this example weakens the influence of the relative position of the light source and the photodetector on the detection results, thus improving the detection efficiency of the device.

[0316] Referring to Figures 13 to 15, based on the detection device 10 described above, this application provides a method for detecting physiological data. By controlling the propagation direction of light incident on the optical device, the detection device can collect physiological signals from multiple different locations along the thickness direction of the skin tissue, and / or, the detection device can collect physiological signals from multiple different locations in a plane perpendicular to the thickness direction of the skin tissue. By analyzing these physiological signals, the physiological condition of the detection site can be analyzed more accurately.

[0317] In Figures 13 and 14, the optical components are positioned close to the photodetector. In Figure 13, different detection points are located at different depths of the detection area. By inputting different control signals to the optical components, the propagation direction of light from these different detection points can be changed differently after passing through the optical components, thus ensuring that all light rays can enter the photodetector. In Figure 14, different detection points are located at different positions on the same plane of the detection area. By inputting different control signals to the optical components, the propagation direction of light from these different detection points will be changed differently after passing through the optical components, thus ensuring that all light rays can enter the photodetector.

[0318] S201, Light source emits detection light.

[0319] In some examples, the detection light can be scattered light or collimated light, and this application does not limit this. Depending on the physiological data to be detected, the light source can emit detection light of different wavelengths; in other words, the detection light here can include light of one or more wavelengths, and this application does not limit this either.

[0320] S202, the optical device receives the third control signal.

[0321] In some examples, the third control signal is used to determine the third refractive index of the optics; and / or, the third control signal is used to determine the third shape of the optics; and / or, the third control signal is used to determine the third distance between the optics and the photodetector.

[0322] When the refractive index of the optical device is set to a third refractive index, and / or when the shape of the optical device is a third shape, and / or when the distance between the optical device and the photodetector is a third distance, the propagation direction of the light from the third detection point can be adjusted to a third direction, thereby incident on the photodetector.

[0323] For example, the optical device can be the optical device 20A mentioned above, and the third control signal can be used to control the electric field, magnetic field, temperature field and stress field within the optical device 20A to adjust the refractive index and / or shape of the optical device 20A.

[0324] For example, the optical device can be the optical device 20B mentioned above, and the third control signal can be used to control the movement distance of the movable part 32 within the optical device 20B along the optical axis, so as to adjust the shape of the optical device 20B and / or the distance between it and the light source.

[0325] The third refractive index mentioned above can indicate the refractive index of a certain part of an optical device, or it can indicate the distribution of the refractive index of different parts of the optical device. Similarly, the third shape mentioned above can include the thickness of a certain part of the optical device, the radius of curvature of its surface, or it can include the distribution of the thickness of different parts of the optical device, the radius of curvature of the incident surface, and the radius of curvature of the exit surface. Related content can be found in the previous introduction to the first refractive index and the first shape, and will not be repeated here.

[0326] S203, the photodetector receives the third ray of light.

[0327] Similar to the first ray, the third ray is part of the detection ray, including the portion of the detection ray incident on the third detection point that is reflected by the third detection point.

[0328] S204, the optical device receives the fourth control signal.

[0329] In some examples, the fourth control signal is used to determine the fourth refractive index of the optics; and / or, the fourth control signal is used to determine the fourth shape of the optics; and / or, the fourth control signal is used to determine the fourth distance between the optics and the photodetector.

[0330] When the refractive index of the optical device is set to the fourth refractive index, and / or when the shape of the optical device is the fourth shape, and / or when the distance between the optical device and the photodetector is the fourth distance, the propagation direction of the light from the fourth detection point can be adjusted to the fourth direction, so as to be incident on the photodetector.

[0331] For example, the fourth control signal can be used to control the electric field, magnetic field, temperature field, and stress field within the optical device 20A; or, the fourth control signal can be used to control the movement distance of the movable member 32 within the optical device 20B along the optical axis. Further explanation of the fourth control signal can be found in the preceding description of the first control signal, and will not be repeated here.

[0332] For an explanation of the fourth refractive index and the fourth shape, please refer to the previous introduction of the first refractive index and the first shape; they will not be repeated here.

[0333] In the above text, the fourth refractive index and the third refractive index can be different, the fourth shape and the third shape can be different, and the fourth spacing and the third spacing can be different. Based on satisfying at least one of the aforementioned three conditions, the fourth direction and the third direction are different, and the fourth detection point and the third detection point are different. For more information on the third and fourth detection points, please refer to the previous sections on the first and second detection points.

[0334] S205, the photodetector receives the fourth ray.

[0335] Similar to the first ray, the fourth ray is part of the detection ray, including the portion of the detection ray incident on the fourth detection point that is reflected by the fourth detection point.

[0336] S206, determine the detection result based on the detection light, the third light, and the fourth light.

[0337] The detection device can determine the detection results of physiological data based on information such as light intensity and waveform contained in the detection light, the third light, and the fourth light. For relevant explanations, please refer to the introduction of S106 above.

[0338] Compared to the absence of optical components, where some of the detection light reflected from different points fails to reach the photodetector, this example places the optical components on one side of the photodetector. By adjusting the propagation direction of the light from the detection points using the optical components, the propagation direction of the light reflected from different points can be appropriately adjusted after entering the optical components, ensuring that the light exiting the optical components can reach the photodetector. This allows more light from different detection points to be received by the photodetector, resulting in higher accuracy of the physiological data determined by the detection device. In other words, this example, by placing the optical components on one side of the photodetector, weakens the influence of the relative position of the light source and the photodetector on the detection results, thus improving the detection efficiency of the device.

[0339] It should be noted that the numbering of steps S201, S202, etc., is only used to identify different steps and does not indicate the execution order of the steps. In some other examples, these steps may be executed in a different order. For example, the optical device may receive the third control signal and / or the fourth control signal first, and then the light source may emit the detection light. In other words, steps S202 and / or S204 may be executed before step S201.

[0340] In some examples, the detection device may contain two optical components, designated as a first component and a second component. Referring to Figures 16 to 18, based on this detection device, embodiments of this application provide a method for detecting physiological data. By adjusting the propagation direction of the detection light emitted from the light source and the propagation direction of the light from the detection point using the first and second components respectively, the detection device can collect physiological signals from multiple different locations along the thickness direction of the skin tissue, and / or, the detection device can collect physiological signals from multiple different locations in a plane perpendicular to the thickness direction of the skin tissue. By analyzing these physiological signals, the physiological condition of the detection site can be analyzed more accurately.

[0341] In Figure 16, different detection points are located at different depths of the detection area. By inputting different control signals to the first device, the propagation direction of the detection light emitted by the light source will change after it enters the first device, so that the detection light can enter different depths of the detection area. By inputting different control signals to the second device, the propagation direction of the light from the aforementioned different detection points will change differently after passing through the second device, so that they can all enter the photodetector.

[0342] In Figure 17, different detection points are located at different positions on the same plane of the detection area. By inputting different control signals to the first device, the propagation direction of the detection light emitted by the light source will change after it enters the first device, so that the detection light can enter different positions on the same plane of the detection area. By inputting different control signals to the second device, the propagation direction of the light from the aforementioned different detection points will change differently after passing through the second device, so that they can all enter the photodetector.

[0343] S301, Light source emits detection light.

[0344] In some examples, the detection light can be scattered light or collimated light, and this application does not limit this. Depending on the physiological data to be detected, the light source can emit detection light of different wavelengths; in other words, the detection light here can include light of one or more wavelengths, and this application does not limit this either.

[0345] S302, the first device receives the fifth control signal.

[0346] In some examples, the fifth control signal is used to determine the fifth refractive index of the first device; and / or, the fifth control signal is used to determine the fifth shape of the first device; and / or, the fifth control signal is used to determine the fifth distance between the first device and the light source.

[0347] When the refractive index of the first device is set to the fifth refractive index, and / or when the shape of the first device is the fifth shape, and / or when the distance between the first device and the light source is the fifth distance, the detection light can propagate along the fifth direction when it exits through the first device and is incident on the fifth detection point of the skin tissue.

[0348] For example, the fifth control signal can be used to control the electric field, magnetic field, temperature field, and stress field within the optical device 20A; or, the fifth control signal can be used to control the movement distance of the movable member 32 within the optical device 20B along the optical axis. Further explanation of the fifth control signal can be found in the preceding description of the first control signal, and will not be repeated here.

[0349] For an explanation of the fifth refractive index and the fifth shape, please refer to the previous introduction of the first refractive index and the first shape; they will not be repeated here.

[0350] S303, the second device receives the seventh control signal.

[0351] In some examples, the seventh control signal is used to determine the seventh refractive index of the second device; and / or, the seventh control signal is used to determine the seventh shape of the second device; and / or, the seventh control signal is used to determine the seventh distance between the second device and the photodetector.

[0352] When the refractive index of the second device is set to the seventh refractive index, and / or when the shape of the second device is the seventh shape, and / or when the distance between the second device and the photodetector is the seventh distance, the propagation direction of the light from the fifth detection point can be adjusted to the seventh direction, thereby incident on the photodetector.

[0353] For example, the seventh control signal can be used to control the electric field, magnetic field, temperature field, and stress field within the second device; alternatively, the seventh control signal can be used to control the movement distance of a moving part within the second device along the optical axis. Further explanation of the seventh control signal can be found in the preceding description of the first control signal, and will not be repeated here.

[0354] For an explanation of the seventh refractive index and the seventh shape, please refer to the previous introduction of the first refractive index and the first shape; they will not be repeated here.

[0355] S304, the photodetector receives the fifth ray.

[0356] Similar to the first ray, the fifth ray is part of the detection ray, including the portion of the detection ray incident on the fifth detection point that is reflected by the fifth detection point.

[0357] S305, the first device receives the sixth control signal.

[0358] In some examples, the sixth control signal is used to determine the sixth refractive index of the first device; and / or, the sixth control signal is used to determine the sixth shape of the first device; and / or, the sixth control signal is used to determine the sixth distance between the first device and the light source.

[0359] When the refractive index of the first device is set to the sixth refractive index, and / or when the shape of the first device is the sixth shape, and / or when the distance between the first device and the light source is the sixth distance, the detection light can propagate along the sixth direction when it exits through the first device and is incident on the sixth detection point of the skin tissue.

[0360] For example, the sixth control signal can be used to control the electric field, magnetic field, temperature field, and stress field within the first device; alternatively, the sixth control signal can be used to control the movement distance of a moving part within the first device along the optical axis. Further explanation of the sixth control signal can be found in the preceding description of the first control signal, and will not be repeated here.

[0361] S306, the second device receives the eighth control signal.

[0362] In some examples, the eighth control signal is used to determine the eighth refractive index of the second device; and / or, the eighth control signal is used to determine the eighth shape of the second device; and / or, the eighth control signal is used to determine the eighth distance between the second device and the photodetector.

[0363] When the refractive index of the second device is set to the eighth refractive index, and / or when the shape of the second device is the eighth shape, and / or when the distance between the second device and the photodetector is the eighth distance, the propagation direction of the light from the sixth detection point can be adjusted to the eighth direction, so as to be incident on the photodetector.

[0364] For example, the eighth control signal can be used to control the electric field, magnetic field, temperature field, and stress field within the second device; alternatively, the eighth control signal can be used to control the movement distance of a moving part within the second device along the optical axis. Further explanation of the eighth control signal can be found in the preceding description of the first control signal, and will not be repeated here.

[0365] For an explanation of the eighth refractive index and the eighth shape, please refer to the previous introduction of the first refractive index and the first shape; they will not be repeated here.

[0366] In the above text, the sixth refractive index and the fifth refractive index can be different, the sixth shape and the fifth shape can be different, and the sixth spacing and the fifth spacing can be different. Furthermore, provided at least one of the aforementioned three conditions is met, the sixth direction and the fifth direction are different, and the sixth detection point and the fifth detection point are different. For more information on the fifth and sixth detection points, please refer to the previous sections on the first and second detection points.

[0367] Similarly, the eighth refractive index and the seventh refractive index can be different, the eighth shape and the seventh shape can be different, the eighth spacing and the seventh spacing can be different, and the eighth direction and the seventh direction are different, provided that at least one of the aforementioned three conditions is met.

[0368] S307, the photodetector receives the sixth ray.

[0369] Similar to the first ray, the sixth ray is part of the detection ray, including the portion of the detection ray incident on the sixth detection point that is reflected by the sixth detection point.

[0370] S308, the detection result is determined based on the detection light, the fifth light, and the sixth light.

[0371] The detection device can determine the detection results of physiological data based on information such as light intensity and waveform contained in the detection light, the fifth light, and the sixth light. For relevant explanations, please refer to the introduction of S106 above.

[0372] Compared to the examples shown in Figure 12 or Figure 15, in this example, an optical device is placed on one side of the light source and another on the other side of the photodetector. These two optical devices can cooperate to enable the detection device to acquire physiological information at different depths of the detection site or at different locations within the same plane, thereby improving the accuracy of the detection results. It is understood that in this example, the properties (refractive index, shape, etc.) of the first device placed near the light source can be adjusted independently, and the properties (refractive index, shape, etc.) of the second device placed near the photodetector can also be adjusted independently, or the properties of the first and second devices can be adjusted simultaneously in coordination.

[0373] It should be noted that this example illustrates the use of one first device and one second device in combination. In some other examples, the detection device may include one first device and multiple second devices, in which case one first device may cooperate with multiple second devices; or, the detection device may include multiple first devices and one second device, in which case one second device may cooperate with multiple first devices; or, the detection device may include multiple first devices and multiple second devices, in which case multiple first devices may cooperate with multiple second devices.

[0374] Compared to not using optical components, where light rays from the light source propagating in different directions strike different points and are reflected at these points, some of the detected light cannot reach the photodetector, this example uses optical components on both the light source and photodetector sides. By adjusting the propagation directions of the light emitted from the light source and the light from the detection points using these optical components, more light rays from different propagation directions can strike the target location. The propagation direction of the light reflected at different points can be appropriately adjusted after striking the optical components to ensure it reaches the photodetector after exiting the optical components. This results in higher accuracy of the physiological data determined by the detection device. In other words, by using optical components on both the light source and photodetector sides, this example reduces the influence of the relative positions of the light source and photodetector on the detection results, thus improving the detection efficiency of the device.

[0375] In Figures 16 and 17, the light source and photodetector each have independent optical components; this is merely an example. In some other examples, referring to the relevant content in Figure 8 above, the light source and photodetector can share the same optical component, and the first, second, third, and fourth control signals mentioned above can all be used to control this optical component. It is understood that these different control signals can correspond to different time periods. For example, the first and third control signals can correspond to the first and second time periods respectively, and these two time periods do not overlap; similarly, the third and fourth control signals can correspond to the third and fourth time periods respectively, and these two time periods do not overlap.

[0376] It should be noted that the numbering of steps S301, S302, etc., is only used to identify different steps and does not indicate the execution order of the steps. In some other examples, these steps can be executed in other orders. For example, the first device receives the fifth control signal first, the second device receives the seventh control signal first, and then the light source emits the detection light. In other words, steps S302 and / or S304 can be executed before step S301.

[0377] When the position of the detection point changes, the optical path of the light from the detection point to the photodetector will also change accordingly. Based on this, the position of the detection point on the skin tissue can be adjusted by controlling the optical components, simulating combinations of light sources and photodetectors with different spacings without changing the actual position between the light source and the photodetector (as shown in Schematic 7-2 in Figure 7 above).

[0378] For example, as shown in Figure 19, the light source emits a detection light L0. By repeatedly adjusting the refractive index and shape of the optical device through different control signals, the detection light L0 can be adjusted into light rays L31, L32, and L33 propagating in three different directions when it exits the optical device. Among them, light ray L31 is deflected towards the side closer to the photodetector, light ray L32 is approximately parallel to the detection light L0, and light ray L33 is deflected away from the photodetector. After being reflected by the detection point 31, light ray L31 forms light ray L34, light ray L32 forms light ray L35 after being reflected by the mirror detection point 32, and light ray L33 forms light ray L36 after being reflected by the detection point 33.

[0379] In terms of skin tissue depth, detection point 31 is shallower, detection point 33 is deeper, and detection point 32 is between the depths of detection point 31 and detection point 33. Detection point 31 is located closer to the photodetector, resulting in a shorter optical path for light L34 to reach the photodetector; detection point 33 is located further away from the photodetector, resulting in a longer optical path for light L36 to reach the photodetector; and the optical path for light L35 to reach the photodetector is between the optical paths of light L34 and L36.

[0380] Detection points 31, 32, and 33 are different, and the optical path lengths of the light rays traveling to the photodetectors corresponding to them are also different. In other words, by adjusting the positions of the detection points, an equivalent detection effect between the light source and multiple photodetectors with different spacings can be achieved. Compared to detection devices that include multiple sets of light sources and photodetectors, the detection device 10 provided in this application contains fewer devices and structural components, and the size of the detection device is smaller.

[0381] As shown in Figure 20, this application embodiment provides a wearable device 50, which may include any of the detection devices provided in the above embodiments. Schematic diagram 20-1 in Figure 20 can represent the overall structure of the wearable device 50, while schematic diagrams 20-2 and 20-3 can respectively represent possible structures of cross-sections AA and BB of the wearable device 50.

[0382] In some examples, the wearable device may include a housing 52 and a detection device 10, which may be located inside the housing 52, or the housing 52 may be used to protect the detection device 10 from the adverse effects of dust and moisture in the external environment.

[0383] The detection device 10 may include a light source 12, a photodetector 14, optical devices 20, etc. For an introduction to the detection device 10, please refer to the description above.

[0384] In some examples, the wearable device 50 may also include a processing module (not shown in the figure), which can be used to process and store the signals acquired by the detection device. This processing module can also be used to regulate the photoelectric measurement front-end controller and the optical device controller to dynamically adjust the focusing depth and measurement position of the light source within the skin tissue, scan the skin tissue to obtain signals at multiple depths and locations, and form a multi-dimensional signal dataset for physiological characteristic algorithm calculations. One possibility is that the processing module in the wearable device 50 can be the central processing system within the detection device.

[0385] In some examples, the side of the housing 52 that contacts the user's skin (hereinafter referred to as the contact surface) may include a light transmission portion 52-1 made of a transparent material, wherein the light transmittance of the transparent material may be greater than a preset threshold (e.g., 95%), so that the light emitted by the light source 12 can pass through this portion and be incident on the detection point, and the light reflected from the detection point can pass through this portion and be incident on the photodetector 14.

[0386] As a result, the housing 52 may include a window, the location of which may be provided with the aforementioned transparent material to form a light-transmitting portion 52-1, and the detection device 10 may be disposed close to the light-transmitting portion 52-1 (or the window). For example, the optical element 20 of the detection device 10 may be attached to the light-transmitting portion 52-1. The optical element 20 may be located between the light source 12 (or photodetector 14) and the light-transmitting portion 52-1 (or the window).

[0387] For example, as shown in schematic diagram 20-2 of FIG20, the window or light transmission part 52-1 can be located at the bottom of the housing 52. The optical axis direction of the optical device 20 can be approximately along the thickness direction of the wearable device 50.

[0388] For example, as shown in schematic diagram 20-3 of FIG20, the window or light transmission part 52-1 may be located on the side wall of the housing 52. The optical axis direction of the optical device 20 may be approximately perpendicular to the thickness direction of the wearable device 50.

[0389] As a result, the movable part 32 and the fixed part 34 of the optical device 20 mentioned above can be located on the housing 52.

[0390] In some examples, the wearable device may also include a display screen 54 on which the processing results of the signals collected by the detection device by the aforementioned processing module can be displayed. This display screen can be considered as an example of the display screen 194 mentioned earlier; further details about the display screen can be found in the description of display screen 194 above.

[0391] In some examples, the wearable device 50 may also include a strap 56 and a buckle 58. The strap 56 may include multiple adjustment holes. The strap 56 and the buckle 58 cooperate to enable the wearable device 50 to be worn.

[0392] Because it includes the detection device 10, the wearable device 50 has more accurate test results during the physiological data detection process. The detection device 10 is relatively smaller, and on this basis, the wearable device 50 can also reduce its size to a certain extent.

[0393] It should be noted that the above description of the structure of the wearable device 50 is exemplary. The wearable device 50 may include more or fewer components, and this application does not limit this. For more description of the software or hardware of the wearable device 50, please refer to the relevant introduction of the electronic device 100 in Figures 1 and 2 above.

[0394] The accuracy of the wearable device 50's detection results of the user's physiological data is related to the fit between the wearable device 50 and the wearing or contact area. In order to enable the wearable device 50 to fit better with the user's skin, one possibility is that the contact surface of the housing 52 can be curved. For example, as shown in schematic diagram 20-2 in Figure 20, the middle area of ​​the contact surface of the housing can be slightly convex.

[0395] Based on the aforementioned wearable device, this application provides a method for wear detection: by controlling optical components, the light source of the detection device can send light to different areas of the wearing part, and the photodetector of the detection device can receive the light reflected from the aforementioned different areas. Based on the received light from different areas, the wearable device can determine the fit between the wearable device and different areas of the wearing part. For areas where the fit is not satisfactory, the wearable device can indicate that the fit in that area is poor and the wearing method of the wearable device needs to be adjusted.

[0396] Figure 21 shows a schematic diagram of the light spots formed on the wearing area when the wearable device fits well with the wearing part. The lower schematic diagram containing the light spots can be regarded as a top view of the upper schematic diagram. Since the wearable device fits well with both detection points, the light emitted by the light source of the detection device can be focused on the two detection points after being adjusted by the optical components. In this case, the area of ​​the light spots formed at both detection points is relatively small.

[0397] Figure 22 shows a schematic diagram of the light spot formed by the detection light on the wearing part when the wearable device does not fit well with a portion of the wearing area. The lower schematic diagram containing the light spot can be considered a top view of the upper schematic diagram. The right side of the bottom surface of the wearable device fits well with the right side of the wearing part, while the left side of the bottom surface of the wearable device is raised and does not fit well with the left side of the wearing part. In this case, the light emitted by the light source of the detection device can focus on the detection point on the right side of the wearing part, but not on the detection point on the left side. Therefore, the area of ​​the light spot formed by the light at the right detection point is smaller, and the area of ​​the light spot formed by the light at the left detection point is larger.

[0398] The method of identifying the bonding status of the device by detecting the area of ​​the light spot is more efficient than the method of determining the bonding status based on the signal quality of the detection point. This method simplifies the bonding status identification process and improves the bonding status identification efficiency.

[0399] The wearable device in Figures 21 and 22 includes two detection points. In other examples, the number of detection points can be more, such as 4, 6, 9, etc. This application does not limit this. These detection points can correspond to multiple different areas of the wearing part, or in other words, these detection points can be used to determine the degree of fit between different areas of the wearing part and the wearable device.

[0400] In some examples, the number and distribution of detection points can be determined based on the shape of the contact surface between the wearable device and the wearing area. As an example, the detection points can be distributed approximately evenly on the aforementioned contact surface.

[0401] For example, as shown in schematic diagram 23-1 of Figure 23, the contact surface TF1 of the wearable device can be roughly rectangular, and there can be two detection points, namely detection point Tp11 and detection point Tp12. Both detection points can be distributed within the contact surface TF1. Specifically, the contact surface TF1 can include two regions Ar11 and Ar12 with basically the same shape and size. Detection point Tp11 can be located in the middle of region Ar11, and detection point Tp12 can be located in the middle of region Ar12. In other words, detection point Tp11 and detection point Tp12 can be used to reflect the fit between region Ar11 and region Ar12 and the wearing part, respectively.

[0402] Alternatively, regions Ar11 and Ar12 can be located on the left and right sides of the contact surface TF1, respectively. This allows detection points Tp11 and Tp12 to reflect the fit between the left and right sides of the wearable device. Alternatively, regions Ar11 and Ar12 can be located above and below the contact surface TF1, respectively. This allows detection points Tp11 and Tp12 to reflect the fit between the upper and lower areas of the wearable device.

[0403] For example, as shown in schematic diagram 23-2 of Figure 23, the contact surface TF2 of the wearable device can be approximately circular, and the number of detection points can be four, namely detection point Tp21, detection point Tp22, detection point Tp23, and detection point Tp24. These four detection points can be evenly distributed within the contact surface TF2. Specifically, the contact surface TF2 can include regions Ar21, Ar22, Ar23, and Ar24. These four regions have basically the same shape and size, and are all approximately sector-shaped with a central angle of 90°. The aforementioned detection points Tp21, Tp22, Tp23, and Tp24 can be located within these four regions, and can be approximately located in the middle of each region. In other words, detection points Tp21, Tp22, Tp23, and Tp24 can be used to reflect the fit between area Ar21, area Ar22, area Ar23, and area Ar24 and the wearing part, respectively.

[0404] As a result, regions Ar21, Ar22, Ar23, and Ar24 can be located above, to the right, below, and to the left of the contact surface TF2, respectively. In this way, detection points Tp21, Tp22, Tp23, and Tp24 can be used to reflect the fit of the upper, right, lower, and left regions of the wearable device, respectively.

[0405] For example, as shown in schematic diagram 23-3 of Figure 23, the contact surface TF3 of the wearable device can be roughly circular, and the number of detection points can be n+1 (n is a positive integer), namely detection point Tp31, detection point Tp32... detection point Tp3(n+1), which can be evenly distributed within the contact surface TF3. Specifically, the contact surface TF3 can include region Ar31, region Ar32... region Ar3(n+1), and these n+1 regions are basically the same size. Optionally, region Ar3(n+1) can be located in the middle of the contact surface TF3 and is roughly circular, and regions Ar31, Ar32... region Ar3n can surround the outer periphery of region Ar3(n+1). In other words, detection point Tp31, detection point Tp32... detection point Tp3(n+1) can be used to reflect the fit between region Ar31, region Ar32... region Ar3(n+1) and the wearing part, respectively.

[0406] More detection points help to more accurately determine the fit between different areas of the wearable device's contact surface and the wearing area, and help to provide users with more precise methods for adjusting the wearing method.

[0407] It is understood that the detection device provided in this application embodiment can adjust the properties (refractive index, shape, etc.) of the optical device by inputting different control signals, so that the propagation direction of the light emitted from the light source can change differently when passing through the optical device. The light emitted from the optical device can be focused on different points in Figure 21 (or Figure 22 or Figure 23), thereby forming light spots in the areas corresponding to these points. As an example, referring to Figure 23, the detection device can sequentially input n+1 different control signals to the optical device. After being modulated by the optical device, the light emitted from the light source can be incident on the areas where the detection points Tp31, Tp32...Tp3(n+1) are located in Figure 23, thereby forming light spots corresponding to these n+1 detection points. The area of ​​these light spots can be used to determine the fit between the area Ar31, area Ar32...area Ar3n, and area Ar3(n+1) and the wearing part.

[0408] Typically, the shape of the contact surface of a wearable device is related to the type of wearable device. For example, if the wearable device is a watch, the contact surface can be square or round; if it is a bracelet, headphones, or glasses, the contact surface can be square. The number and distribution of detection points can be determined based on the shape of the contact surface, which can also be understood as: the number and distribution of detection points can match the type of wearable device. In other words, for different types of wearable devices, the detection device provided in this application can detect the fit between these wearable devices and the wearing area.

[0409] Based on the above-mentioned method for detecting fit, if the fit is poor during the physiological data detection process, the wearable device can prompt the user to adjust the wearing method, or the wearable device can ignore the detection data from the poorly fitted area, thereby improving the accuracy of physiological data detection.

[0410] In some examples, wearable devices can check the fit of the device before physiological data is measured. If there are areas where the fit is poor, the wearable device can prompt the user to adjust the wearing method so that the area fits the wearing part properly.

[0411] As an example, schematic diagram 24-1 in Figure 24 shows the interface 301 of a wearable device. This interface 301 can be used to trigger the wearable device to perform physiological data detection. The physiological data can include one or more of the following: respiratory rate, heart rate, blood oxygen content, electrocardiogram, etc. This application does not limit this. For example, the interface 301 can be a trigger interface for "micro-health checkup," and the interface 301 can include a control 401. When the user selects the control 401, the wearable device can perform operations related to "micro-health checkup," such as detecting the aforementioned physiological data such as heart rate.

[0412] In some examples, wearable devices can detect the fit between the device and the wearing or contacting area before detecting physiological data.

[0413] One possible scenario is that all areas of the wearable device's contact surface fit well. In this case, as shown in schematic diagram 24-2 of Figure 24, the wearable device can display an interface 302, which can include the detection results of the device's fit. For example, the interface 302 can include information 501 displayed in the form of text, images, etc., which can be used to indicate that the wearable device fits well with the wearing area. The interface 302 can also include a control 402. When the user selects the control 402, the wearable device can begin collecting the user's physiological data.

[0414] One possible scenario is that the wearable device's contact surface has a poor fit in certain areas. In this case, as shown in schematic diagram 24-3 of Figure 24, the wearable device can display an interface 303, which can include the detection results of the device's fit. For example, the interface 303 can include information 502 displayed in the form of text, images, etc., which can be used to indicate that the wearable device does not fit well with the wearing area. This information 502 can also be used to indicate areas where the wearable device does not fit well with the wearing area, and / or, this information 502 can also be used to indicate areas where the wearable device fits well with the wearing area.

[0415] In diagram 24-3, information 502 indicates that the left side of the watch (wearable device) does not fit well against the user's wrist. Information 502 may include the text "The left side of the watch does not fit well, please adjust," and may also include an image that highlights (e.g., shows) the left side area of ​​the watch.

[0416] When the detection device is positioned close to the side wall of the wearable device, or in other words, when the detection device is mounted on the side of the wearable device, as shown in schematic diagram 20-3 of Figure 20, the user can measure physiological data (such as blood oxygen saturation) by pressing or touching the contact surface located on the outer surface of the side wall of the wearable device. In one possible scenario, the user's finger may not make proper contact with a portion of the contact surface. In this case, the wearable device can display a prompt interface, which may include indications of which area of ​​the contact surface requires less pressure. The user can then adjust the magnitude and / or location of the force applied to the contact surface based on this indication.

[0417] For situations where wearable devices do not fit well against the body, one feasible approach is for the user to adjust the wearing method according to the device's prompts to achieve a proper fit. Alternatively, the user can adjust the magnitude and / or location of the force applied to the contact surface according to the device's prompts to ensure the required tactile pressure. Based on this, the wearable device can display interface 302, allowing the user to trigger the device to measure physiological data by selecting control 402.

[0418] For situations where wearable devices do not fit well with the wearing area, another feasible approach is for the wearable device to collect physiological data from the area where the device fits well. For example, as shown in schematic diagram 24-3 of Figure 24, interface 303 may include control 403. When the user selects control 403, the wearable device can use physiological data from the well-fitting area to reflect the user's physiological condition.

[0419] As an implementation, wearable devices can collect physiological data only from areas that fit well, and not from areas that do not fit well.

[0420] As another implementation, wearable devices can collect physiological data from both well-fitting and poorly-fitting areas, ignoring the physiological data from the poorly-fitting areas during data processing. Alternatively, during the processing of the collected physiological data, the wearable device can filter the data based on the fit, removing physiological data from poorly-fitting areas and using only the physiological data from well-fitting areas.

[0421] When the device is not properly fitted, actively controlling the detection light to be incident on a well-fitted position can reduce the power consumption of the light source; since less data needs to be processed, the photodetector needs to process fewer signals, resulting in higher efficiency in physiological data detection.

[0422] In some examples, wearable devices can also detect the fit of the device and display the detection results in scenarios where non-physiological data measurement is not involved. Alternatively, the aforementioned fit detection function can be enabled by default, or it can be manually enabled by the user.

[0423] For example, as shown in schematic diagram 24-4 of Figure 24, this is the interface 304 for manually activating the aforementioned fit detection function. This interface 304 may include a control 404. When the user selects the control 404, the wearable device can continuously detect the fit of the device during the user's wearing of the device.

[0424] Involuntary movements within or around the human body (such as breathing, heartbeat, gastrointestinal peristalsis, swallowing, muscle tremors, etc.), voluntary movements (such as body swaying due to the inability to remain still), or relative movements between wearable devices and users (such as relative sliding between a watch and the wrist) can all produce motion artifacts. The presence of motion artifacts may lead to distortion or invalidation of physiological data detection results.

[0425] To reduce the adverse effects of motion artifacts on physiological data detection results and improve the accuracy of physiological data detected by wearable devices, this application also provides a method for physiological data detection: by controlling optical devices, the detection device can detect signals at different depths of skin tissue, combine the characteristics of superficial and deep signals, use the superficial signal as a reference signal for motion artifacts, perform adaptive motion artifact filtering, and obtain a purer arterial signal for health characteristic algorithm calculation (such as heart rate), thereby improving the accuracy of exercise heart rate.

[0426] As shown in Figure 25, the detection ray λa is used to detect the physiological signal at detection point Tp41 located on the skin surface. By adjusting the propagation direction of the detection ray λa through optical devices (not shown in the figure), the detection ray λa can also detect the physiological signal at detection point Tp42 located deep in the skin. Detection point Tp42 can be located approximately below (directly below or near directly below) detection point Tp41, or in other words, the projections of detection points Tp41 and Tp42 in the reference plane partially or completely overlap. Here, the reference plane can refer to a plane perpendicular to the depth direction of the skin tissue.

[0427] In contrast, detection point Tp43 in Figure 25 is a different detection point located deep within the skin, distinct from detection point Tp42. Detection point Tp43 is farther from detection point Tp41. As the detection light propagates to detection point Tp43, it passes through tissue Ts1 located between detection points Tp42 and Tp43. This tissue Ts1 interferes with the propagation of the detection light. In other words, the detection light passing through detection point Tp42 contains less noise information, while the detection light passing through detection point Tp43 contains more noise information. Therefore, the results obtained by combining the user's physiological data determined by detection points Tp41 and Tp42 are more accurate; conversely, the results obtained by combining the user's physiological data determined by detection points Tp41 and Tp43 may contain greater errors.

[0428] Figure 26-1 shows the interface 311 of a wearable device. This interface 311 can be used to trigger the wearable device to detect physiological data, which may include one or more of the following: respiratory rate, heart rate, blood oxygen saturation, and electrocardiogram (ECG). This application does not limit the scope of this data. For example, interface 311 can be used to detect a user's heart rate. This interface 311 may include a control 411. When the user selects the control 411, the wearable device can collect signals from different depths of the user's skin tissue and output the user's heart rate based on the signal collection results.

[0429] As can be understood, as mentioned above, wearable devices can detect the fit of the device before collecting physiological signals. The relevant details can be found in the previous description and will not be repeated here.

[0430] In some examples, wearable devices can directly output heart rate detection results based on the collected physiological signals, such as "heart rate: 128 beats / min".

[0431] One possible scenario is that the signal collected by the detection point is unusable for determining the user's heart rate, or the heart rate value determined by the signal collected by the detection point deviates from the normal range. In this case, a feasible approach is for the wearable device to automatically adjust the detection point and re-collect physiological data to output the heart rate. As an implementation, the wearable device can display an interface 314 as shown in schematic diagram 26-2 of Figure 26. This interface 314 can include heart rate detection results. For example, interface 314 can include information 513, which can be used to indicate that the current detection point has strong noise signals, and heart rate detection will continue after adjusting the detection point. Alternatively, this information 513 can also be used to instruct the user to remain still to complete the heart rate measurement.

[0432] After completing signal acquisition at different detection points, the wearable device can output physiological data such as "heart rate: 125 beats / min".

[0433] During blood oxygen saturation measurement, wearable devices emit two different wavelengths of light (e.g., red light around 660 nanometers and infrared light around 940 nanometers) into the blood vessels of the skin tissue. By detecting the absorption of these two different wavelengths of light by oxyhemoglobin and deoxyhemoglobin, the user's blood oxygen saturation can be determined. However, the distribution of blood vessels varies at different depths of skin tissue, resulting in differences in the absorption of infrared and red light.

[0434] To more accurately detect a user's blood oxygen content, this application also provides a method for physiological data detection. The optical device can focus the light path at different depths of the skin tissue to detect light signals at different depths at the same location. Combined with a polynomial fitting blood oxygen model, the accuracy of blood oxygen content detection is improved.

[0435] Referring to Figure 27, during the blood oxygen content detection process, the number of detection points can be m (m is a positive integer), namely detection point Tp51, detection point Tp52... detection point Tp5m. Detection point Tp51 can be close to the skin surface or capillaries, and detection point Tp5m can be close to the deep skin or arteries (veins).

[0436] In some examples, at least two of the m detection points partially or completely overlap in their projections onto the reference plane. For instance, the projections of all m detection points onto the reference plane at least partially overlap.

[0437] Referring to the previous explanation of Figure 25, multiple detection points along the depth direction of the skin tissue reduce the interference of non-detection points on the light during light propagation, reduce the noise contained in the light signal, and improve the detection accuracy of blood oxygen content.

[0438] As one implementation, the calculation model for blood oxygen content can be as follows: SpO2=g(R h1 ,R h2 ,…,R hm )

[0439] Where h1, h2, and hm represent the depth information (e.g., distance from the skin surface) of detection points Tp51, Tp52, and Tp5m, respectively, and R h1 R h2 R hmThese represent the R values ​​(ratio of red light to infrared light absorbance) corresponding to detection points Tp51, Tp52, and Tp5m, respectively. g is used to represent the values ​​based on R... h1 R h2 R hm The calculation method for blood oxygen content uses SpO2 to represent the test results of blood oxygen content.

[0440] Understandably, during blood oxygen saturation detection, wearable devices can collect signals from multiple detection points at the same skin depth, thereby improving the accuracy of blood oxygen saturation detection. In other words, in some examples, the multiple detection points during blood oxygen saturation detection may include at least two detection points that are located within a reference plane.

[0441] Figure 28-1 shows the interface 321 of a wearable device, which can be used to trigger the wearable device to detect blood oxygen saturation. For example, the interface 321 may include a control 421, which, when selected by the user, allows the wearable device to measure the user's blood oxygen saturation.

[0442] Understandably, as mentioned above, wearable devices can check the fit of the device before measuring blood oxygen levels. For details, please refer to the previous description, which will not be repeated here.

[0443] In some examples, wearable devices can directly output the blood oxygen content detection result based on the collected physiological signals, such as "blood oxygen content: 97%", etc.

[0444] In some examples, to facilitate user awareness of the device's processing, when acquiring signals from capillary sites, the wearable device can display an interface 322 as shown in Figure 28. This interface 322 may include information on the blood oxygenation detection status and / or progress. For example, interface 322 may include information 521, which can be used to indicate that signals from capillary sites are being acquired.

[0445] Similarly, when acquiring signals from an artery, the wearable device can display an interface 323 as shown in Figure 28. This interface 323 may include information on the blood oxygenation detection status and / or progress. For example, the interface 323 may include information 522, which can be used to indicate that signals from an artery are being acquired.

[0446] In some examples, when acquiring signals from multiple detection points located within a reference plane, the wearable device can display an interface 324 as shown in Figure 28. This interface 324 may include information on the blood oxygen saturation detection status and / or progress. For example, interface 324 may include information 523, which can be used to indicate that a signal is being acquired within area A.

[0447] When signal acquisition is completed at detection points at different depths, the wearable device can output the detection result of blood oxygen content according to the above calculation model, such as "blood oxygen content: 98%".

[0448] Based on a similar principle, this application also provides a method for detecting physiological data. By controlling optical devices, the detection device can detect signals at different depths and in different areas of the wearing site. Through multi-point detection, physiological signals at different points can be obtained, thereby improving the accuracy and robustness of physiological data detection.

[0449] As shown in Figure 29, physiological signals from M detection points were collected during a single physiological data detection process. The coordinates of the i-th detection point Tpi can be (xi, yi, zi), where 0 < i ≤ M, and i and M are both positive integers. Here, zi can represent the information of the detection point Tpi in the depth direction of the skin tissue, and xi and yi can represent the information of the position of the detection point Tpi in the reference plane.

[0450] The detection light λ is reflected by the detection point Tpi and then incident on the photodetector. The photodetector can acquire the signal S(i) based on the received light. The physiological data to be detected is PhDa = q(S(0),S(1),…S(i)…S(M)). In the above formula, q() can represent the method of determining the physiological data PhDa based on the physiological signals detected at different detection points. It is understood that q() can be different for different types of physiological data, and this application does not impose any restrictions on this.

[0451] In some examples, wearable devices can automatically collect signals from different depths and regions, and output physiological data detection results based on the collected signals.

[0452] In some examples, wearable devices can collect signals at specified depths and in specified areas based on user selection, and output physiological data detection results based on these signals. In other words, the detection points can be determined based on user selection.

[0453] For example, the wearable device can collect signals from detection points at different depths according to the user's selection. Schematic diagram 30-1 in Figure 30 shows the interface 331 of the wearable device, which allows the user to select the detection points from which signals need to be collected. Specifically, interface 331 allows the user to select the depth of the detection points from which signals need to be collected.

[0454] As an implementation, interface 331 may include control 431, which can be used to select the depth of the detection point where the signal needs to be acquired. For example, control 431 may include image information of the depth selection range, which may display the upper and lower boundaries of the skin tissue. The user can mark any point within the aforementioned upper and lower boundaries as a detection point. Alternatively, control 431 may include text information of the depth selection range, which can be used to indicate the upper boundary (e.g., 0 cm) and lower boundary (e.g., 0.5 cm) of the skin tissue. Control 431 may also include an input box, in which the user can input the depth value (e.g., 0.5 cm) of the point to be detected. The wearable device can then determine the detection point based on this depth value.

[0455] For example, the wearable device can collect signals from detection points in different areas according to the user's selection. Schematic diagram 30-2 in Figure 30 shows the interface 332 of the wearable device. This interface 332 allows the user to select the detection points where signals need to be collected. Specifically, the interface 332 allows the user to select the location of the detection points where signals need to be collected within the reference plane.

[0456] As an implementation, interface 332 may include control 432, which can be used to select the location of the detection point where the signal needs to be acquired within the reference plane. For example, control 432 may include image information of the detection point where the signal can be acquired, which may display the boundaries of the area enclosed by the aforementioned detection point (including the upper boundary, lower boundary, left boundary, and right boundary within the reference plane). The user can select the detection point by marking any point located within the aforementioned area. Alternatively, control 432 may include text information indicating the boundaries of the area where the signal can be acquired, which may be used to indicate the upper boundary (e.g., 0 cm), lower boundary (e.g., 3.6 cm), left boundary (e.g., 0 cm), and right boundary (e.g., 5.5 cm) of the area enclosed by the detection point within the reference plane. Control 432 may also include an input box, in which the user can input the coordinates of the point to be detected (e.g., (0.5 cm, 1.5 cm)). The wearable device can then determine the detection point based on these coordinates.

[0457] Based on the same concept, this application also provides a detection device 3100, as shown in FIG31. This detection device 3100 may possess the functions of the detection device 10 or wearable device 50 in the above method embodiments, and can be used to execute the steps performed by the functions of the detection device 10 or wearable device 50 in the above method embodiments. This function can be implemented by hardware, or by software or hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0458] In one possible implementation, the detection device 3100 may include an acquisition module 3110 and a processing module 3120, which are coupled to each other.

[0459] In some examples, the acquisition module 3110 can be used to support the operation of the detection device 10 or wearable device 50 in the foregoing embodiments to acquire physiological signals of the detection points.

[0460] The processing module 3120 is used to support the detection device 10 or the wearable device 50 in performing the processing actions in the above method embodiments, such as determining the detection results of physiological data based on the detection light, etc.

[0461] Optionally, the detection device 3100 may also include a storage unit 3130 for storing the program code and data of the detection device 3100.

[0462] Figure 32 illustrates an electronic device 3200 provided in an embodiment of this application. As shown, the electronic device 3200 includes at least one processor 3210 and a transceiver 3220. The processor 3210 is coupled to a memory and is used to execute instructions stored in the memory to control the transceiver 3220 to transmit and / or receive signals.

[0463] Optionally, the electronic device 3200 also includes a memory 3230 for storing instructions.

[0464] In some embodiments, the processor 3210 and the memory 3230 can be combined into a single processing device, with the processor 3210 executing program code stored in the memory 3230 to achieve the aforementioned functions. In specific implementations, the memory 3230 can be integrated into the processor 3210 or independent of the processor 3210.

[0465] In some embodiments, transceiver 3220 may include a receiver (or receiver unit) and a transmitter (or transmitter unit).

[0466] The transceiver 3220 may further include an antenna, and the number of antennas may be one or more. The transceiver 3220 may be a communication interface or an interface circuit.

[0467] When the electronic device 3200 is a chip, the chip includes a transceiver module and a processing module. The transceiver module can be an input / output circuit or a communication interface; the processing module can be a processor, microprocessor, or integrated circuit integrated on the chip.

[0468] This embodiment also provides a computer-readable storage medium storing computer instructions. When the computer instructions are executed on an electronic device, the electronic device performs the aforementioned method steps to implement the physiological data detection method in the above embodiment.

[0469] This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned steps to implement the physiological data detection method described in the above embodiment.

[0470] Furthermore, embodiments of this application also provide an apparatus, which may specifically be a chip, component, or module. The apparatus may include a connected processor and a memory. The memory stores computer-executable instructions. When the apparatus is running, the processor can execute the computer-executable instructions stored in the memory to cause the chip to perform the physiological data detection methods described in the above-described method embodiments.

[0471] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0472] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0473] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0474] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0475] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0476] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0477] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology 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

A detection device characterized by comprising: The detection device comprises: a light source, a photodetector and an optical device, the light source is configured to emit detection light; the optical device is configured to transmit the detection light; the optical device is further configured to receive a control signal and adjust the propagation direction of the detection light according to the control signal; the photodetector is configured to detect the detection light transmitted by the optical device. The detection device according to claim 1, characterized in that The refractive index of the optical device is adjustable, and / or the shape of the optical device is adjustable, and / or the distance between the optical device and the light source and / or the photodetector is adjustable. The detection device according to claim 2, characterized in that The optical device comprises a superlens. The detection device according to claim 2 or 3, characterized in that The optical device comprises one or more lenses that can move along the optical axis of the optical device. The detection device according to any one of claims 2 to 4, characterized in that The control signal is used to adjust the refractive index of the optical device, and / or the control signal is used to adjust the shape of the optical device, and / or the control signal is used to adjust the distance between the optical device and the light source and / or the photodetector. The detection device according to any one of claims 1-5, wherein: the optical device is located between a detection point and the light source, and the optical device is configured to adjust the propagation direction of the detection light so that the detection light is incident on the detection point; and / or the optical device is located between the detection point and the photodetector, and the optical device is configured to adjust the propagation direction of the first light from the detection point so that the first light is incident on the photodetector, and the detection light comprises the first light. The projection of the light source and / or the photodetector in a first plane at least partially overlaps with the projection of the optical device in the first plane, and the first plane is perpendicular to the optical axis of the optical device. The detection device according to claim 6, characterized in that The optical device comprises a first device and a second device, the projection of the light source in the first plane at least partially overlaps with the projection of the first device in the first plane, and the projection of the photodetector in the first plane at least partially overlaps with the projection of the second device in the first plane. The detection device according to claim 7, characterized in that The detection device further comprises a controller electrically connected to the optical device and configured to send the control signal to the optical device. The detection device according to any one of claims 1 to 8, characterized in that The detection device further comprises a processor configured to determine physiological data and / or the fitting degree of the detection device according to the detection light. The detection device according to any one of claims 1 to 9, characterized in that The detection device according to any one of claims 1-10, wherein the detection device is connected to a housing. A wearable device characterized by The housing comprises at least one window on the bottom surface and / or the side wall of the housing, and the optical device of the detection device faces the window, and the optical device is located between the light source of the detection device and the window. The wearable device of claim 11, wherein, The method applied to the wearable device of claim 11 or 12, comprising: A detection method characterized by comprising: collecting a first physiological signal from a first point; collecting a second physiological signal from a second point; determining a detection result of physiological data according to the first physiological signal and the second physiological signal; and determining a detection result of physiological data according to the first physiological signal and the second physiological data. The first point and the second point are located in a reference plane, or a projection of the second point in the reference plane at least partially overlaps with a projection of the first point in the reference plane, and the reference plane is perpendicular to a depth direction of the skin tissue. The detection method according to claim 13, characterized in that The first point is located on a surface layer of the skin tissue, and the first physiological signal is used to remove motion artifacts. The detection method according to claim 13 or 14, characterized in that, The physiological data includes blood oxygen content, the first physiological signal is used to indicate blood oxygen content of capillaries, and the second physiological signal is used to indicate blood oxygen content of arteriovenous. The detection method according to claim 15, characterized in that The method further includes: collecting a third physiological signal from a third point, a projection of the third point in the reference plane at least partially overlaps with a projection of the first point in the reference plane and / or a projection of the second point in the reference plane; The detection result of the physiological data determined according to the first physiological signal and the second physiological signal includes: The detection result of the physiological data is determined according to the first physiological signal, the second physiological signal, and the third physiological signal. The detection method according to any one of claims 13 to 16, characterized in that The method further includes: The light source sends a first detection light; The photodetector receives a first light from a first incident point, the first light including light reflected by the first detection light at the first incident point; The photodetector receives a second light from a second incident point, the second light including light reflected by the first detection light at the second incident point; In a case where an area of a light spot in a region where the first incident point is located is greater than a first threshold, first information is displayed, the first information being used to indicate that a fitting condition of the first incident point is poor; and / or, In a case where an area of a light spot in a region where the second incident point is located is less than or equal to the first threshold, second information is displayed, the second information being used to indicate that a fitting condition of the second incident point is good. The detection method according to claim 17, characterized in that The method further includes: The light source sends a second detection light; The photodetector receives a third light from the second incident point, the third light including light reflected by the second detection light at the second incident point; The detection result of the physiological data is determined according to the second detection light and the third light. An electronic device, characterized by comprising: The electronic device includes a processor and a memory, the memory stores program instructions, and the processor is configured to execute the program instructions to enable the electronic device to implement the method in any one of claims 13 to 18. A computer-readable storage medium, characterized by A computer program is stored thereon, and the computer program is executed by a computer to enable the method in any one of claims 13 to 18 to be implemented. A computer program product, characterized in that The computer program code enables the method in any one of claims 13 to 18 to be executed when the computer program code is run on a computer. A chip characterized by The chip includes a processor and a memory, the memory stores program instructions, and the processor is configured to execute the program instructions to enable the chip to implement the method in any one of claims 13 to 18.

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