An intelligent wearable device

Abstract

The application provides a smart wearable device, which comprises a bottom shell and three sensor windows formed on the bottom shell, the three sensor windows comprising two light emitting windows and one light receiving window, the two light emitting windows being respectively provided with light emitting units; the light receiving window is provided with a first light sensor and a second light sensor, the light receiving window, the first light sensor and the second light sensor are rectangular, the first light sensor and the second light sensor are arranged side by side along the long side direction of the light receiving window, and the long sides of the first light sensor and the second light sensor are correspondingly arranged with the long side of the light receiving window; the two light emitting windows are arranged side by side at one side of the light receiving window and correspondingly arranged with the long side of the light receiving window. The two light sensors are placed in the same sensor window, and only one optical isolation piece is arranged corresponding to the two light sensors, so as to reduce the area occupied by the sensor area, which is beneficial to the miniaturization of the smart wearable device.

Description

Technical Field

[0001] This invention belongs to the field of electronic technology, and more specifically, relates to a smart wearable device. Background Technology

[0002] With the development of technology and the improvement of living standards, smart wearable electronic products such as smartwatches and smart bracelets are becoming increasingly popular. Smartwatches and smart bracelets have functions that traditional watches do not have, such as display, communication, music playback, internet access, and physiological monitoring.

[0003] Smart wearable devices typically use photoplethysmography (PPG) to detect human physiological parameters. PPG sensors usually consist of a light emitter and a light sensor, and are generally of two types: reflective and transmissive. Reflective PPG sensors are more commonly used in smart wearable devices. The principle of a reflective PPG sensor is as follows: light is emitted from the light emitter into the user's blood or tissue, and the light sensor detects the light reflected from the blood or tissue. The intensity of this reflected light is used to measure human physiological parameters. The detected reflected signal consists mostly of a direct current (DC) component and a small portion of a pulsating component (AC) component. The distance between the light emitter and the light sensor affects the reflected signal. For example, the closer the distance, the stronger the PPG signal detected by the light sensor, and the larger the amplitude of the pulsating component in the PPG signal. As the distance between the light emitter and the light sensor increases, the modulation depth of the PPG signal (the ratio of the pulsating component amplitude to the DC component amplitude) increases. A larger modulation depth helps to remove motion noise in the PPG signal. Both the pulsating signal amplitude and the modulation depth affect the accuracy of physiological parameter detection. To ensure that the PPG signal has a large pulsation component amplitude and modulation depth, multiple optical transmitters and multiple optical sensors at different distances are usually set up.

[0004] Typically, in existing technologies, multiple light sensors are placed in different sensor windows. To avoid cross-lighting between the light sensors and the light emitters, optical isolators are usually placed in each sensor window. The design of more sensor windows and optical isolators will increase the area of ​​the sensor region, which is not conducive to the miniaturization of smart wearable devices. Summary of the Invention

[0005] The purpose of this invention is to provide a smart wearable device that addresses the problem that the design of numerous sensor windows and optical isolation components in existing smart wearable devices increases the sensor area, which is detrimental to the miniaturization of smart wearable devices.

[0006] To achieve the above objectives, the present invention provides a smart wearable device, which includes a bottom shell and three sensor windows formed on the bottom shell, the three sensor windows including:

[0007] Two light emission windows are each equipped with a light emission unit;

[0008] The light receiving window is equipped with a first light sensor and a second light sensor. The light receiving window, the first light sensor, and the second light sensor are rectangular. The first light sensor and the second light sensor are arranged side by side along the long side of the light receiving window, and the long sides of the first light sensor and the second light sensor are configured to correspond to the long side of the light receiving window.

[0009] Two optical emission windows are arranged side by side at a distance from each other on one side of the optical receiving window, and are positioned corresponding to the long side of the optical receiving window.

[0010] Furthermore, the light emitting unit includes a green light emitter, a red light emitter, and an infrared light emitter. The green light emitter is located inside the light emitting window on the side closer to the light receiving window, while the red light emitter and the infrared light emitter are located inside the light emitting window on the side farther away from the light receiving window.

[0011] Furthermore, the light emitting window is quadrilateral, and the first side of the light emitting window facing the light receiving window is parallel to the long side of the light receiving window.

[0012] Furthermore, the length of the first side of the light emitting window facing the light receiving window is less than 1 / 2 of the length of the long side of the light receiving window.

[0013] Furthermore, the length of the first side of the light emission window is less than or equal to the length of the long side of the first and second light sensors.

[0014] Furthermore, the light emitting window includes a second side and a third side perpendicular to the first side, the second side and the third side being located between the extension line of the short side of one side of the light receiving window and the perpendicular bisector of the long side.

[0015] Furthermore, the first and second optical sensors have the same shape, and the length of the long side of the first and second optical sensors is less than 1 / 2 of the length of the long side of the light receiving window.

[0016] Furthermore, a third optical sensor is also configured within the optical receiving window. The third optical sensor is located on the side of the optical receiving window closer to the optical emitting window. The distance between the third optical sensor and any one of the two optical emitting windows is less than the distance between the first optical sensor and any one of the two optical emitting windows, and the distance between the third optical sensor and any one of the two optical emitting windows is less than the distance between the second optical sensor and any one of the two optical emitting windows.

[0017] Furthermore, the third optical sensor is rectangular, and its long side is configured to correspond to the long side of the light receiving window, and the distance between the third optical sensor and the two light emitting windows is the same.

[0018] Furthermore, the smart wearable device also includes a controller configured to control the green light emitter of at least one light emitting unit in the two light emitting windows to emit light in a low-power mode, and to control the light detected by the third light sensor to determine heart rate information.

[0019] Furthermore, the smart wearable device also includes a controller configured to control the infrared light emitter of at least one light emitting unit in the two light emitting windows to emit light in a low-power mode, and to control the third light sensor to detect light to determine wearing information.

[0020] Furthermore, the smart wearable device also includes a controller configured to control the green light emitter of at least one light emitting unit in the two light emitting windows to emit light in a high-performance mode, and to control the detection light of at least one of the first light sensor, the second light sensor, and the third light sensor.

[0021] Each green light emitter and a light sensor constitute a light detection channel. The controller selects one or more of the light detection channels with better PPG signal quality from multiple light detection channels to determine heart rate information.

[0022] Furthermore, the smart wearable device also includes a controller configured to control at least one light emitter in at least one light emitting unit in the two light emitting windows to emit light, and to control at least one of the first light sensor, the second light sensor, and the third light sensor to detect light to determine human physiological parameter information.

[0023] The beneficial effects of the smart wearable device provided by this invention are as follows: The smart wearable device includes a bottom shell and three sensor windows formed on the bottom shell. The three sensor windows include two light emitting windows and one light receiving window. The two light emitting windows are respectively equipped with light emitting units. The light receiving window is equipped with a first light sensor and a second light sensor. The light receiving window, the first light sensor, and the second light sensor are rectangular. The first light sensor and the second light sensor are arranged side by side along the long side of the light receiving window, and the long sides of the first light sensor and the second light sensor are corresponding to the long side of the light receiving window. The two light emitting windows are arranged side by side at intervals on one side of the light receiving window and are arranged corresponding to the long side of the light receiving window. By placing two light sensors in the same sensor window, only one optical isolator is required for the two light sensors, thereby reducing the area occupied by the sensor area and facilitating the miniaturization of the smart wearable device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of a smart wearable device provided in one embodiment of the present invention;

[0026] Figure 2 This is a rear view of a smart wearable device provided in one embodiment of the present invention;

[0027] Figure 3 This is a partial rear view of the sensor area of ​​a smart wearable device provided in one embodiment of the present invention;

[0028] Figure 4 This is a partial rear view of the sensor area of ​​a smart wearable device provided in another embodiment of the present invention. Detailed Implementation

[0029] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and 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. Therefore, they should not be construed as limitations on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] User movement, muscle activity, improper device wearing, and ambient light can all contribute to significant noise in PPG detection signals. Therefore, current technologies typically employ multiple light emitters and sensors, with the emitters positioned in different emission windows and the sensors in different detection windows, to remove PPG signal noise and detect various physiological parameters. To prevent crosstalk between the sensors and emitters, optical isolators are usually placed in each sensor window. However, a large number of sensor windows and optical isolators increase the sensor area, hindering the miniaturization of smart wearable devices.

[0034] First, it should be noted that the smart wearable device provided in this application is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Smart wearable devices may include, but are not limited to, smartwatches, smart bracelets, smart wristbands, etc. In the following embodiments, a smartwatch will be used as an example for illustration.

[0035] like Figure 1 As shown, the smart wearable device 100 includes a base 102 and a display screen 104 mounted on the base 102. The smart wearable device 100 also includes a strap 106 connected to both ends of the base 102, which can be used to fasten the smart wearable device 100 to the user's wrist.

[0036] The base shell 102 is configured according to the overall shape of the smart wearable device 100. For example, if the smart wearable device 100 is square, the base shell 102 can be square; if the smart wearable device 100 is round, the base shell 102 can be round. The base shell 102 can be made of various materials, such as plastic, ceramic, metal (e.g., stainless steel, aluminum, titanium alloy, etc.), other suitable materials, or any combination of two or more of these materials. The base shell 102 can be formed using a one-piece configuration. In a one-piece configuration, the base shell 102 can be machined or molded. The base shell 102 can also be assembled from multiple structures, such as assembling a plastic inner frame with a metal outer shell.

[0037] The display screen 104 can be used to display various information such as time, health indicators, and other information. The display screen 104 can be a touch screen display screen 104 including capacitive touch sensors, resistive touch sensors, or other touch sensor components, or it can be a non-touch-sensitive display screen 104.

[0038] In some embodiments, the smart wearable device 100 may be equipped with a microphone and physical buttons, etc. The cavity formed by the display screen 104 and the bottom shell 102 may be equipped with components such as chips, internal sensors, and batteries. The chip can be used as a controller for the smart wearable device to control the light emitting unit to emit light and to control the light sensor to detect light reflected by human blood and tissues.

[0039] The microphone is located on the side of the bottom shell 102. The microphone can convert the collected sound signals into electrical signals, which are then received by the audio circuit and converted into audio data. The audio circuit can also convert the audio data into electrical signals, transmit them to the speaker, and then convert them into sound signals for output.

[0040] Physical buttons are located on the side of the bottom shell 102. The physical buttons can be press-type buttons or rotary buttons. These physical buttons can be volume control buttons for controlling volume, power on or off display screen 104, and power on / off buttons for controlling the smart wearable device 100. The smart wearable device 100 can receive physical button inputs and generate key signal inputs related to user settings and function control of the smart wearable device 100.

[0041] Internal sensors include gyroscope sensors, accelerometer sensors, temperature sensors, and touch sensors. The gyroscope sensor is used to determine the motion posture of the smart wearable device 100; the accelerometer sensor is used to detect the magnitude of the acceleration of the smart wearable device 100 in various directions (generally three axes), and can detect the magnitude and direction of gravity when the smart wearable device 100 is stationary; the temperature and humidity sensor is used to detect temperature and humidity; the touch sensor, also known as a "touch device," can be placed on the display screen 104, and the touch sensor and the display screen 104 together form a touch screen, also known as a "touchscreen," and the touch sensor is used to detect touch operations applied to or near it.

[0042] The chip can connect to various sensors and convert signals detected by a heart rate sensor into corresponding health indicators. The chip may include one or more processing units, such as an application processor (AP), modem processor, memory, digital signal processor (DSP), baseband processor, and / or neural network processing unit (NPU).

[0043] The battery can provide power to components such as the display screen 104, the controller and processor in the chip, and the types of batteries include, but are not limited to, lithium batteries, dry cell batteries, and rechargeable batteries.

[0044] like Figures 2 to 3 As shown, the smart wearable device 100 includes a bottom shell 102 and three sensor windows formed on the bottom shell 102. The three sensor windows include two light emitting windows 202A and 202B and a light receiving window 204.

[0045] Two optical emission windows 202A and 202B are each equipped with an optical emission unit 302.

[0046] The light receiving window 204 is equipped with a first light sensor 304 and a second light sensor 306. The light receiving window 204, the first light sensor 304 and the second light sensor 306 are rectangular. The first light sensor 304 and the second light sensor 306 are arranged side by side along the long side of the light receiving window 204, and the long side of the first light sensor 304 and the second light sensor 306 are configured to correspond to the long side of the light receiving window 204.

[0047] In this embodiment, the sensor window can be formed by drilling holes in the bottom shell 102 and installing a transparent lens to form a window through which light can pass. In some embodiments, the sensor window and the bottom shell 102 can be formed by two-color injection molding, that is, the bottom shell 102 is entirely injection molded with a non-transparent material, while the part corresponding to the sensor window is injection molded with a transparent material. Those skilled in the art should know that the light emitting windows 202A and 202B are respectively equipped with light emitting units 302, and the light receiving window 204 is equipped with a first light sensor 304 and a second light sensor 306. This means that the light emitting units 302 and the light sensors are mounted on the circuit board inside the smart wearable device 100, and their positions correspond to and are exposed in the sensor window.

[0048] like Figure 2 As shown, in this embodiment, the bottom shell 102 has a convex spherical portion 110 in the middle, and the light emitting windows 202A, 202B and the light receiving window 204 are located on the spherical portion 110. When the smart wearable device 100 is worn, the spherical portion 110 protrudes from the bottom shell 102 and can always be in contact with the human skin. Positioning the light emitting windows 202A, 202B and the light receiving window 204 on the spherical portion 110 ensures that when the smart wearable device 100 is worn, the light emitting windows 202A, 202B and the light receiving window 204 are in close contact with the human skin, reducing the influence of ambient light and improving signal quality. Those skilled in the art should understand that... Figure 2This is a rear view of the smart wearable device 100, where the spherical portion 110 appears circular.

[0049] exist Figure 3 The diagram only illustrates the structure of the spherical portion 110, the sensor area. (Reference) Figure 3 Each light emitting unit 302 includes a green light emitter 402, a red light emitter 404, and an infrared light emitter 406. The green light emitter 402 is located within the light emitting windows 202A and 202B, closer to the light receiving window 204. The red light emitter 404 and the infrared light emitter 406 are located within the light emitting windows 202A and 202B, further away from the light receiving window 204. The green light emitter 402 primarily emits green light, which is reflected by human blood tissue and detected by a light sensor to measure the human heart rate. The red light emitter 404 and the infrared light emitter 406 primarily emit red and infrared light, which are reflected by human blood tissue and detected by a light sensor to measure the human blood oxygen saturation. Of course, other physiological parameters, such as blood pressure, blood sugar, and body composition, can also be calculated based on the green, red, and infrared light reflected by human blood and tissue.

[0050] The light emitter can be a light-emitting LED, and the photodetector can be a light-emitting diode. Those skilled in the art will understand that the green light emitter 402, the red light emitter 404, and the infrared light emitter 406 can be a three-in-one LED integrated on a single circuit board, or they can be three separate LEDs placed together.

[0051] like Figure 3As shown, a first optical isolator 308 is disposed on the bottom shell 102 at positions corresponding to the light emitting windows 202A and 202B, and a second optical isolator 310 is disposed at a position corresponding to the light receiving window 204. The first optical isolator 308 and the second optical isolator 310 respectively define a receiving cavity with the bottom shell 102. The light emitting unit 302 is located within the receiving cavity defined by the first optical isolator 308 and the bottom shell 102, and the first light sensor 304 and the second light sensor 306 are located within the receiving cavity defined by the second optical isolator 310 and the bottom shell 102. The optical isolator can be integrally formed with the bottom shell 102, for example, as an isolation rib formed on the bottom shell 102, and foam can be disposed on the isolation rib. The circuit board on which the light emitting unit 302 and the light sensor are mounted is in close contact with the foam to improve the light blocking effect. In this embodiment, a first optical isolator 308 is disposed around the entire light emitting windows 202A and 202B, and a second optical isolator 310 is disposed around the light receiving window 204, thereby forming optical isolation between the light receiving window 204 and the light emitting windows 202A and 202B to prevent light crosstalk. Therefore, in this embodiment, two light sensors are placed within the same sensor window, so only one optical isolator is needed for the two light sensors, which reduces the area occupied by the PPG sensor region and facilitates the miniaturization of the smart wearable device 100.

[0052] In this embodiment, two optical emitting windows 202A and 202B are arranged side-by-side at a distance from one side of the optical receiving window 204, corresponding to the long side of the optical receiving window 204. Both optical emitting windows 202A and 202B are quadrilaterals, with their first side facing the optical receiving window 204 parallel to the long side of the optical receiving window 204. The side length of the first side of the optical emitting windows 202A and 202B facing the optical receiving window 204 is less than half the length of the long side of the optical receiving window 204. The optical emitting windows 202A and 202B include a second side and a third side perpendicular to the first side, located between the extension of the short side of one side of the optical receiving window 204 and the perpendicular bisector of the long side. Thus, one of the two optical emitting windows 202A and 202B is perpendicular to one side of the optical receiving window 204. Figure 3 The upper or lower half of the light receiving window 204 shown corresponds to one of the other halves, and the other corresponds to the other side of the light receiving window 204. Figure 3 (This corresponds to the lower or upper half of the light receiving window 204 shown).

[0053] The first optical sensor 304 and the second optical sensor 306 have the same shape, and the length of the longer side of the first optical sensor 304 and the second optical sensor 306 is less than half the length of the longer side of the light receiving window 204. Preferably, the length of the first side of the light emitting windows 202A and 202B is less than or equal to the length of the longer side of the first optical sensor 304 and the second optical sensor 306. Thus, one of the two light emitting windows 202A and 202B corresponds to the first optical sensor 304, and the other corresponds to the second optical sensor 306, as shown below. Figure 3 As shown, the distance between the light emitting unit 302 and the first light sensor 304 is equal to the distance between the light emitting unit 302 and the second light sensor 306. Furthermore, the light emitting units 302 in light emitting windows 202A and 202B can correspond to light sensors at different distances. The same light sensor can receive light emitted from the light emitting units 302 in different light emitting windows 202A and 202B and reflected by human tissue and blood. Light emitted from the light emitting units 302 in the same window and reflected by human tissue and blood can be received by light sensors at different distances. Therefore, light emitted from light emitting units 302 at different distances and reflected by human blood and tissue can be received by light sensors to remove noise caused by user movement, user muscle movement, improper device wearing, and ambient light.

[0054] The controller of the smart wearable device 100 is coupled to the light emitting unit 302, the first light sensor 304, and the second light sensor 306. When detecting human physiological parameters, the controller can control at least one of the light emitting units 302 to emit light, and at least one light sensor can detect the emitted light.

[0055] In some embodiments, the controller can control the green light emitter 402 of any one of the two light emitting units 302 to emit light. The light sensor that is closer to it can acquire the PPG signal with a larger pulsation component, making it easier to identify the heart rate signal; the light sensor that is farther away can acquire the PPG signal with a larger modulation depth, thereby comparing the two signals to remove the noise component in the PPG signal and improving the accuracy of physiological information recognition.

[0056] In some embodiments, the controller can control the two light emitting units 302 to emit light sequentially and compare the PPG signals detected by the light sensor at different time periods to remove motion noise in the PPG signals.

[0057] In some embodiments, the controller can control two light emitting units 302 to emit light simultaneously and compare the PPG signals detected by different light sensors to remove motion noise from the PPG signals. Simultaneous emission of light from two light emitting units will increase the light intensity and increase the pulsation component in the PPG signal, making it easier to identify the heart rate from the PPG signal.

[0058] In some embodiments, the controller can select only one of the two light emitting units 302 to be turned on to reduce the power consumption of the device. In low-power mode, the controller can control the two light emitting units 302 to emit light sequentially, and compare the PPG signals detected by different light sensors when different light emitting units 302 are turned on. The controller selects the light emitting unit 302 with the better quality signal to remain on. When the quality of the PPG signals detected by both light sensors is less than a preset threshold, the controller can re-control the light emitting units 302 to emit light sequentially, and compare the PPG signals detected by different light sensors when different light emitting units 302 are turned on, and then select the light emitting unit 302 with the better quality signal to remain on. This ensures that a better quality PPG signal is available even in low-power mode, thereby improving the accuracy of physiological information recognition.

[0059] In some embodiments, the controller may control the red light emitter 404 and the infrared light emitter 406 in the light emission window 202A to emit light and determine blood oxygen information based on the PPG signal detected by the first light sensor 304; or the controller may control the red light emitter 404 and the infrared light emitter 406 in the light emission window 202B to emit light and determine blood oxygen information based on the PPG signal detected by the second light sensor 306.

[0060] In some embodiments, the controller can control the red light emitter 404 and the infrared light emitter 406 in the light emission window 202A to emit light, and determine blood oxygen information based on the PPG signal detected by the second light sensor 306. Alternatively, the controller can control the red light emitter 404 and the infrared light emitter 406 in the light emission window 202B to emit light, and determine blood oxygen information based on the PPG signal detected by the second light sensor 304. Typically, the distance between the red light emitter 604 and the infrared light emitter 606, which are mainly used for blood oxygen measurement, and their corresponding light sensors is the largest, while the distance between the green light emitter 602, which is mainly used for heart rate measurement, and the light sensor is smaller. The centers of the light emission window 202A, the light emission window 202B, the first light sensor 304, and the second light sensor 306 form the four vertices of a quadrilateral. Selecting the two diagonally opposite vertices with the greatest distance as the blood oxygen detection path can further reduce the area of ​​the PPG sensor region, which is beneficial for device miniaturization. Figure 4 This is a schematic diagram of the second embodiment of this application. Different from... Figure 2 and Figure 3 In the embodiment shown, the smart wearable device 100 further includes a third light sensor 312 within its light receiving window 204. The third light sensor 312 is positioned within the light receiving window 204 near the light emitting windows 202A and 202B. The distance between the third light sensor 312 and any one of the two light emitting windows 202A and 202B is less than the distance between the first light sensor 304 and any one of the two light emitting windows 202A and 202B. Furthermore, the distance between the third light sensor 312 and any one of the two light emitting windows 202A and 202B is less than the distance between the second light sensor 306 and any one of the two light emitting windows 202A and 202B. In other words, the third light sensor 312 is closer to the two light emitting windows 202A and 202B than the first light sensor 304 and the second light sensor 306.

[0061] The third sensor is rectangular, and its long side corresponds to the long side of the light receiving window 204. The third light sensor 312 is equidistant from the two light emitting windows 202A and 202B.

[0062] In low-power mode, the controller can be configured to control the green light emitter 402 of at least one of the two light emission windows 202A, 202B, to emit light, and control the light detected by the third light sensor 312 to determine heart rate information. Since the third light sensor 312 is closer to the two light emission windows 202A, 202B than the first light sensor 304 and the second light sensor 306, the power of the green light emitter 402 in the light emission unit 302 can be reduced in low-power mode. The third light sensor 312 can still receive a PPG signal with a large pulsation component to identify the user's heart rate. Low-power mode refers to the smart wearable device 100 operating in a power-reducing mode, such as when the battery is low, or in a power-reducing mode manually set by the user.

[0063] Additionally, the controller is configured to control the infrared light emitter 406 of at least one of the light emitting units 302 in the two light emitting windows 202A and 202B to emit light in a low-power mode, and to control the third light sensor 312 to detect the light to determine wearing information. Wearing detection based on infrared light avoids the impact of visible light generated during wear checks on the user. Especially when the user is not wearing the device, the smart wearable device 100 may periodically emit light to detect wearing information; if the detected light is visible light, it will affect the user.

[0064] In high-performance mode, the controller can be configured to control the green light emitter 402 of at least one light emitting unit 302 in the two light emission windows 202A and 202B to emit light, and to control at least one of the first light sensor 304, the second light sensor 306, and the third light sensor 312 to detect light to determine heart rate information. Each green light emitter 402 and a light sensor constitute a light detection channel, and the controller controls the selection of one or more light detection channels with better PPG signal quality from among the multiple light detection channels to determine heart rate information.

[0065] Specifically, in high-performance mode, the controller is configured to control all green light emitters 402 of the two light emitting units 302 to emit light simultaneously, and to control at least one of the first light sensor 304, the second light sensor 306, and the third light sensor 312 to determine heart rate information. Simultaneous emission of the two green light emitters 402 increases light intensity, resulting in a larger pulsating component in the PPG signal detected by the light sensors, making it easier to identify the heart rate signal. The controller can use only one of the first light sensor 304, the second light sensor 306, and the third light sensor 312 to detect light, or it can use one, two, or three of them simultaneously. When two or three sensors are used simultaneously to detect light, the light emitted by the green light emitters 402 passes through different human tissues and is detected by different light sensors. By comparing the PPG signals detected by different light sensors, noise components in the PPG signals can be removed. High-performance mode refers to the PPG sensor module operating at a higher performance level, capable of acquiring better physiological signals, regardless of power consumption. For example, when a user measures physiological parameters using a smart wearable device or when the user activates motion monitoring mode, the PPG sensor module's light emitter can have higher power in high-performance mode than in low-power mode, thereby increasing light intensity.

[0066] Because activating all green light emitters 402 of both light emitting units 302 simultaneously in high-performance mode would consume significant power, the controller can control all green light emitters 402 of the two light emitting units 302 to emit light sequentially. Based on the PPG signal quality acquired by the first optical sensor 304, the second optical sensor 306, and the third optical sensor 312, the controller selects a subset of channels for heart rate recognition to reduce power consumption. Each green light emitter and one optical sensor in each light emitting unit 302 can constitute a light detection channel. In high-performance mode, a single light detection channel or a combination of multiple light detection channels can be selected for heart rate recognition based on the PPG signal quality of each light transmission channel, achieving optimal performance and lowest power consumption.

[0067] The smart wearable device 100 can also be used to detect other physiological parameters besides heart rate and blood oxygen, such as blood pressure and blood sugar. The controller can be configured to control at least one light emitter in at least one light emitting unit 302 of the two light emitting windows 202A and 202B to emit light, and to control at least one detection light from the first light sensor 304, the second light sensor 306, and the third light sensor 312 to determine human physiological parameter information. Each light emitter and light sensor in each light emitting unit 302 can form a light detection channel, and one or more channels can be selected to detect physiological parameter information according to the detection requirements.

[0068] The controller can be configured to determine heart rate information based on the signal detected by the third optical sensor 312 in a low-power mode, and to determine heart rate information based on the signals detected by at least two of the first optical sensor 304, the second optical sensor 306, and the third optical sensor 312 in an exercise mode. Since the third optical sensor 312 is closer to the two light emission windows 202A and 202B than the first optical sensor 304 and the second optical sensor 306, the power of the green light emitter 402 in the light emission unit 302 can be reduced in low-power mode, while the third optical sensor 312 can still detect PPG signals with a large pulsation component to identify the user's heart rate. In exercise mode (non-low-power mode), heart rate information is determined based on the signals detected by at least two of the first optical sensor 304, the second optical sensor 306, and the third optical sensor 312. This allows for comparison of PPG signals collected by different optical sensors to remove noise components from the PPG signals, improving the accuracy of physiological information recognition.

[0069] In summary, in this embodiment, the smart wearable device includes a bottom shell and three sensor windows formed on the bottom shell. The three sensor windows include two light-emitting windows and one light-receiving window. Each of the two light-emitting windows is equipped with a light-emitting unit. The light-receiving window is equipped with a first light sensor and a second light sensor. The light-receiving window, the first light sensor, and the second light sensor are rectangular. The first and second light sensors are arranged side-by-side along the long side of the light-receiving window, with their long sides corresponding to the long side of the light-receiving window. The two light-emitting windows are spaced apart and arranged side-by-side on one side of the light-receiving window, corresponding to its long side. By placing two light sensors within the same sensor window, only one optical isolator is needed for each of the two light sensors, reducing the area occupied by the sensor region and facilitating the miniaturization of the smart wearable device.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart wearable device, characterized in that, The smart wearable device includes a bottom shell and three sensor windows formed on the bottom shell, the three sensor windows including: Two light emission windows are each equipped with a light emission unit; A light receiving window is configured with a first light sensor and a second light sensor. The light receiving window, the first light sensor, and the second light sensor are rectangular. The first light sensor and the second light sensor are arranged side by side along the long side of the light receiving window, and the long sides of the first light sensor and the second light sensor are configured corresponding to the long side of the light receiving window. The two light emission windows are arranged side by side with a gap between them on one side of the light receiving window, and are arranged corresponding to the long side of the light receiving window; The bottom shell has a convex spherical portion in the middle, and the two light emitting windows and the light receiving window are located on the spherical portion; when the smart wearable device is worn, the spherical portion protrudes from the bottom shell and is always in contact with the human skin.

2. The smart wearable device according to claim 1, characterized in that, The light emitting unit includes a green light emitter, a red light emitter, and an infrared light emitter. The green light emitter is located inside the light emitting window on the side close to the light receiving window, while the red light emitter and the infrared light emitter are located inside the light emitting window on the side away from the light receiving window.

3. The smart wearable device according to claim 1, characterized in that, The light emitting window is quadrilateral, and the first side of the light emitting window facing the light receiving window is parallel to the long side of the light receiving window.

4. The smart wearable device according to claim 3, characterized in that, The length of the first side of the light emitting window facing the light receiving window is less than 1 / 2 of the length of the long side of the light receiving window.

5. The smart wearable device according to claim 3, characterized in that, The length of the first side of the light emission window is less than or equal to the length of the long side of the first light sensor and the second light sensor.

6. The smart wearable device according to claim 5, characterized in that, The light emitting window includes a second side and a third side perpendicular to the first side, and the second side and the third side are located between the extension line of the short side of one side of the light receiving window and the perpendicular bisector of the long side.

7. The smart wearable device according to claim 3, characterized in that, The first optical sensor and the second optical sensor have the same shape, and the length of the long side of the first optical sensor and the second optical sensor is less than 1 / 2 of the length of the long side of the light receiving window.

8. The smart wearable device according to claim 2, characterized in that, A third optical sensor is also configured within the optical receiving window. The third optical sensor is located on the side of the optical receiving window closer to the optical emitting window. The distance between the third optical sensor and any one of the two optical emitting windows is less than the distance between the first optical sensor and any one of the two optical emitting windows, and the distance between the third optical sensor and any one of the two optical emitting windows is less than the distance between the second optical sensor and any one of the two optical emitting windows.

9. The smart wearable device according to claim 8, characterized in that, The third optical sensor is rectangular, and its long side is configured to correspond to the long side of the light receiving window. The distance between the third optical sensor and the two light emitting windows is the same.

10. The smart wearable device according to claim 8, characterized in that, The smart wearable device also includes a controller configured to control the green light emitter of at least one light emitting unit in the two light emitting windows to emit light in a low-power mode, and to control the light detected by the third light sensor to determine heart rate information.

11. The smart wearable device according to claim 8, characterized in that, The smart wearable device also includes a controller configured to control the infrared light emitter of at least one light emitting unit in the two light emitting windows to emit light in a low-power mode, and to control the third light sensor to detect light to determine wearing information.

12. The smart wearable device according to claim 8, characterized in that, The smart wearable device also includes a controller configured to control the green light emitter of at least one light emitting unit in the two light emitting windows to emit light in a high-performance mode, and to control the detection light of at least one of the first light sensor, the second light sensor, and the third light sensor. Each green light emitter and a light sensor constitute a light detection channel. The controller selects one or more of the light detection channels with better PPG signal quality from multiple light detection channels to determine heart rate information.

13. The smart wearable device according to claim 8, characterized in that, The smart wearable device also includes a controller configured to control at least one light emitter in at least one light emitting unit in the two light emitting windows to emit light, and to control at least one of the first light sensor, the second light sensor and the third light sensor to detect light to determine human physiological parameter information.

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