WO2021218784A1 - Optical module, electronic device, and biological characteristic data detection method - Google Patents

Abstract

Disclosed are an optical module, an electronic device, and a biological characteristic data detection method. The optical module comprises: a circuit board, a light-emitting component arranged on the circuit board, and a first photoelectric detector and a second photoelectric detector, which are arranged on the circuit board, wherein each of the light-emitting component, the first photoelectric detector and the second photoelectric detector is correspondingly provided with a polarizer; the polarization direction of a first polarizer corresponding to the first photoelectric detector is the same as the polarization direction of a second polarizer corresponding to the light-emitting component; and the polarization direction of a third polarizer corresponding to the second photoelectric detector is perpendicular to the polarization direction of the second polarizer.

Description

Optical component, electronic equipment and biological characteristic data detection method

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010354743.4 filed in China on April 29, 2020, the entire content of which is incorporated herein by reference.

Technical field

The present invention relates to the field of communication technology, in particular to an optical assembly, electronic equipment and a method for detecting biological characteristic data.

Background technique

Heart rate detection is widely used on smart wearable devices. At present, it is mainly based on photoplethysmograph (PhotoPlethysmoGraphy, PPG). The PPG method uses light-emitting diodes (Light Emitting Diode, LED) to actively emit light waves to the human body, and the echo signal is detected by a photodetector (PD). The echo signal contains the blood flow pulsation information of the human body. This method is susceptible to interference from ambient light and human motion. For example, for smart watches, changes in ambient light and human motion will cause echo signals to be mixed with interference information and affect the accuracy of heart rate reading.

Summary of the invention

The embodiments of the present invention provide an optical component, an electronic device, and a method for detecting biological characteristic data to solve the problem of inaccurate center rate detection results in the prior art.

In the first aspect, an embodiment of the present invention provides an optical assembly, including:

Circuit board

A light-emitting component arranged on the circuit board;

A first photodetector and a second photodetector arranged on the circuit board;

The light-emitting component, the first photodetector, and the second photodetector are respectively provided with polarizing plates;

Wherein, the polarization direction of the first polarizer corresponding to the first photodetector is the same as the polarization direction of the second polarizer corresponding to the light-emitting component; the polarization of the third polarizer corresponding to the second photodetector is The direction and the polarization direction of the second polarizer are perpendicular to each other.

In the second aspect, an embodiment of the present invention also provides an electronic device, including the above-mentioned optical component.

In a third aspect, embodiments of the present invention also provide a method for detecting biometric data, which is applied to the above-mentioned electronic device, and includes:

Acquiring the first electrical signal output by the first photodetector and the second electrical signal output by the second photodetector;

Calculating the difference between the first electrical signal and the second electrical signal;

Acquire biometric data according to the difference.

In a fourth aspect, an embodiment of the present invention also provides an electronic device, including:

The first acquisition module is used to acquire the first electrical signal output by the first photodetector and the second electrical signal output by the second photodetector;

A calculation module for calculating the difference between the first electrical signal and the second electrical signal;

The second acquisition module is configured to acquire biometric data according to the difference.

In a fifth aspect, an embodiment of the present invention also provides an electronic device, including a processor, a memory, and a computer program stored on the memory and running on the processor, and the computer program is executed by the processor. When executed, the steps of the above-mentioned biometric data detection method are realized.

In a sixth aspect, the embodiments of the present invention also provide a computer-readable storage medium having a computer program stored on the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned biometric data detection method is implemented step.

In this way, in the above solution of the present invention, the light-emitting component, the first photodetector, and the second photodetector are respectively provided with a polarizing plate, and the second polarizing plate can make the light of the light-emitting component face a fixed direction. For emission, part of the ambient light is filtered through the first polarizer, but the light of the light-emitting component is fully passed, and the light of the light-emitting component and part of the ambient light are filtered through the third polarizer, so that the light source is distinguished. In this way, by calculating the difference between the electrical signal output by the first photodetector and the electrical signal of the second photodetector, the detection signal after filtering out the ambient light can be obtained, and the ambient light can be filtered out more thoroughly. , And to a certain extent weaken the impact of wearing jitter, and ultimately improve the accuracy of PPG heart rate detection.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 shows one of the structural schematic diagrams of the optical component of the embodiment of the present invention;

Fig. 2a shows a schematic diagram of the polarization state of the first polarizer and the second polarizer in an embodiment of the present invention;

Fig. 2b shows a schematic diagram of the polarization state of the third polarizer of the embodiment of the present invention;

Fig. 3 shows a schematic diagram of signal transmission of a photodetector according to an embodiment of the present invention;

4 shows a schematic diagram of the signal structure received by the photodetector according to the embodiment of the present invention;

FIG. 5 shows the second structural diagram of the optical component of the embodiment of the present invention;

FIG. 6 shows a schematic flowchart of a method for detecting biometric data according to an embodiment of the present invention;

FIG. 7 shows a schematic diagram of a module structure of an electronic device according to an embodiment of the present invention;

FIG. 8 shows a schematic structural diagram of an electronic device according to another embodiment of the present invention.

Description of Reference Signs: 1. Circuit board, 2. Light emitting component, 3, first photodetector, 4, second photodetector, 5, first retaining ring, 6, second retaining ring, 7, back Cover, 21, second polarizer, 31, first polarizer, 41, third polarizer.

Detailed ways

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the drawings show exemplary embodiments of the present invention, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

As shown in FIG. 1, an embodiment of the present invention provides an optical assembly, including:

Circuit board 1; a light-emitting component 2 arranged on the circuit board 1;

The first photodetector 3 and the second photodetector 4 arranged on the circuit board 1;

The light-emitting component 2, the first photodetector 3, and the second photodetector 4 are respectively provided with polarizing plates;

Wherein, the polarization direction of the first polarizer 31 corresponding to the first photodetector 3 is the same as the polarization direction of the second polarizer 21 corresponding to the light-emitting component 2; The polarization direction of the three polarizer 41 and the polarization direction of the second polarizer 21 are perpendicular to each other.

In this embodiment, the circuit board 1 may be a printed circuit board (Printed Circuit Board, PCB), and the light-emitting component 2 may be an LED. The circuit board 1 is provided with a first photodetector 3 and a second photodetector 4 for detecting echo signals. Wherein, the light-emitting component 2 may be arranged between the first photodetector 3 and the second photodetector 4. The first photodetector 3 is correspondingly provided with a first polarizer 31, and the first polarizer 31 may be provided directly in front of the direction in which the first photodetector 3 receives incident light; the light-emitting component 2 is correspondingly provided with The second polarizer 21, the second polarizer 21 can be arranged directly in front of the light emitting component 2; the second photodetector 4 is correspondingly provided with a third polarizer 41, the third polarizer The sheet 41 may be arranged directly in front of the direction in which the second photodetector 4 receives incident light.

It should be noted that the polarization direction of the first polarizer 31 corresponding to the first photodetector 3 is the same as the polarization direction of the second polarizer 21 corresponding to the light-emitting component 2, and the light-emitting component 2 is an LED. As an example, the first polarizer 31 will not reduce the transmittance of the LED light; while the ambient light is uniformly polarized light in all directions, so some energy (such as 50%) passes through. The polarization direction of the third polarizer 41 corresponding to the second photodetector 4 and the polarization direction of the second polarizer 21 are perpendicular to each other. Taking the light emitting component 2 as an LED as an example, 0% of the light energy of the LED passes The third polarizer 41, that is, the light emitted by the LED cannot pass through the third polarizer 41, and the ambient light is uniformly polarized light in all directions, so part of the energy (for example, 50%) passes through. The polarization states of the first polarizer 31 and the second polarizer 21 are shown in FIG. 2a, and the polarization states of the third polarizer 41 are shown in FIG. 2b.

In an embodiment of the present invention, the light-emitting component, the first photodetector, and the second photodetector are respectively provided with a polarizing plate, and the second polarizing plate can cause the light emitted by the light-emitting component to be emitted toward a fixed direction. , The ambient light is filtered out by the first polarizer, and the light source is distinguished. In this way, by calculating the difference between the electrical signal output by the first photodetector and the electrical signal of the second photodetector, the detection signal after filtering out the ambient light can be obtained, and the ambient light can be filtered out more thoroughly. , And to a certain extent weaken the impact of wearing jitter, and ultimately improve the accuracy of PPG heart rate detection.

Optionally, the optical assembly further includes: a first retaining ring 5 arranged between the first photodetector 3 and the light-emitting component 2; The second retaining ring 6 between the light-emitting parts 2. The first retaining ring 5 and the second retaining ring 6 are used to prevent the light emitted by the light-emitting component 2 from entering the first photodetector 3 and the second photodetector 4 inside the device, Avoid affecting the dynamic range of the sensor and improve the accuracy of heart rate detection.

It should be noted that the polarizers are independently arranged; and/or, the polarizers are integrated. Wherein, the first target polarizer includes: at least one of the first polarizer 31, the second polarizer 21, and the third polarizer 41; the second target polarizer includes: the At least one of the first polarizer 31, the second polarizer 21, and the third polarizer 41; the first target polarizer and the second target polarizer include different polarizers. That is, the first polarizer 31, the second polarizer 21, and the third polarizer 41 may be independent of the first photodetector 3, the light-emitting component 2 and the second photodetector, respectively. The polarizer 4 is provided; the polarizer can also be integrated in the light-emitting component 2, the first photodetector 3 or the second photodetector 4; or part of the polarizer is set independently, and part of the polarizer is integrated .

In this embodiment, since the first target polarizer and the second target polarizer include different polarizers, the first polarizer 31, the second polarizer 21, and the third polarizer 41 is partially set independently and partially integrated as an example. For example, the first target polarizer includes the first polarizer 31, that is, the first polarizer 31 is set independently of the first photodetector 3; The second target polarizer includes: the second polarizer 21 and the third polarizer 41, that is, the second polarizer 21 is integrated in the light emitting component 2, and the third polarizer 41 is integrated in Inside the second photodetector 4. Alternatively, the first target polarizer includes the first polarizer 31 and the second polarizer 21, that is, the first polarizer 31 is arranged independently of the first photodetector 3, and the second polarizer The polarizer 21 is arranged independently of the light-emitting component 2; the second target polarizer includes a third polarizer 41, that is, the third polarizer 41 is integrated inside the second photodetector 4. It should be noted that the first target polarizer and the second target polarizer include but are not limited to the above-mentioned combination forms, and the independent or integrated polarizers can be selected according to requirements.

Optionally, when the first target polarizer includes: the first polarizer 31, the second polarizer 21, and the third polarizer 41, the second target polarizer is zero. That is, when the first polarizer 31, the second polarizer 21, and the third polarizer 41 are all independently arranged, the second target polarizer does not exist. In the case where the second target polarizer includes: the first polarizer 31, the second polarizer 21, and the third polarizer 41, there are zero first target polarizers, that is, When the first polarizer 31, the second polarizer 21, and the third polarizer 41 are all integrated, the first target polarizer does not exist.

Optionally, the second polarizer 21 faces the light emitting surface of the light-emitting component 2, or the second polarizer 21 is integrated inside the light-emitting component 2; the first polarizer 31 faces the The light incident surface of the first photodetector 3, or the first polarizer 31 is integrated inside the first photodetector 3; the third polarizer 41 faces the light of the second photodetector 4 The incident surface, or, the third polarizer 41 is integrated inside the second photodetector 4.

Taking the second polarizer 21 facing the light emitting surface of the light emitting component 2 as an example, as shown in FIG. 1, the second polarizer 21 is located directly above the light emitting component 2; the first polarizer 31 Towards the light incident surface of the first photodetector 3, as shown in FIG. 1, the first polarizer 31 is located directly above the first photodetector 3; the third polarizer 41 faces the The light incident surface of the second photodetector 4 is shown in FIG. 1, and the third polarizer 41 is located directly above the second photodetector 4.

Wherein, the first polarizer 31, the second polarizer 21, and the third polarizer 41 can be set independently. Optionally, the second polarizer 21 and the light emitting component 2 are arranged at a first preset distance; the first polarizer 31 and the first photodetector 3 are arranged at a second preset distance; The third polarizer 41 and the second photodetector 4 are separated by a third preset distance. Preferably, the first polarizer 31 can be attached to the outer surface of the first photodetector 3, the second polarizer 21 is attached to the outer surface of the light-emitting component 2, and the third polarizer The sheet 41 is attached to the outer surface of the second photodetector 4.

The first preset distance, the second preset distance, and the third preset distance can be set according to actual light incident requirements, and should ensure that the incident or emission of light is not affected. The first preset distance, the second preset distance, and the third preset distance may be the same or different.

Optionally, the second polarizer 21 is integrated in the light-emitting component 2; the first polarizer 31 is integrated in the first photodetector 3; the third polarizer 41 is integrated in the Inside the second photodetector 4.

The first polarizer 31, the second polarizer 21, and the third polarizer 41 may also be integrated in the first photodetector 3, the light-emitting component 2, and the second photodetector, respectively. 4Internal. Further, the first polarizer 31 is integrated inside the side where the first photodetector 3 receives light, and the second polarizer 21 is integrated inside the side where the light emitting component 2 emits light. The third polarizer 41 is integrated inside the side of the second photodetector 4 that receives light.

Optionally, the first polarizer 31, the second polarizer 21, and the third polarizer 41 can also be partially independently arranged, and partially integrated. For example: the second polarizer 21 faces the light emitting surface of the light-emitting component 2, the first polarizer 31 is integrated inside the first photodetector 3, and the third polarizer 41 is integrated in the The inside of the second photodetector 4; or, the second polarizer 21 is integrated inside the light-emitting component 2, the first polarizer 31 is integrated inside the first photodetector 3, and the third polarizer The sheet 41 faces the light incident surface of the second photodetector 4. The arrangement of the polarizer can be selected according to requirements.

Optionally, as shown in FIG. 1, the optical assembly further includes: a back cover 7; the back cover 7 is a part of the outer casing of the optical assembly. The back cover 7 is a part of the optical assembly that is attached to the surface of the human body. The light emitted by the light emitting component 2 can pass through the back cover 7 and illuminate the human body (such as the position of blood vessels); the ambient light reflected by the human body and The light emitted by the reflected light-emitting component 2 can also enter the wearable device through the back cover 7 to enter the first photodetector 3 or the second photodetector 4.

Optionally, the optical assembly further includes: a first analog-to-digital converter connected to the first photodetector 3; and a second analog-to-digital converter connected to the second photodetector 4. The first photodetector 3 and the second photodetector 4 are two independent photosensitive devices that output analog signals through photoelectric conversion, and the first analog-to-digital converter converts the first photodetector The analog signal output by 3 is converted into a first digital electric signal, and the second analog-to-digital converter converts the analog signal output by the second photodetector 4 into a second digital electric signal. Taking the first electrical signal and the second electrical signal as voltage signals as an example, by obtaining their voltage values respectively, the light energy values they have taken in can be obtained. At this time, the difference between the voltage values reflects all the values. The difference in light energy taken by the first photodetector 3 and the second photodetector 4 is achieved by subtracting the voltage value to achieve the subtraction of light energy.

The first photodetector 3 and the second photodetector 4 are sampled separately by two analog-to-digital converters (ADC), and the data stream accessed by the platform is two-way ADC splicing Come. As shown in FIG. 3, the first electrical signal output by the first photodetector 3 is transmitted to ADC1 through a first transimpedance amplifier (TransImpedance Amplifier, TIA), and the second electrical signal output by the second photodetector 4 is The signal is transmitted to ADC2 through the second transimpedance amplifier TIA2. ADC1 and ADC2 input the converted first and second electrical signals to the First In First Out (FIFO) buffer, and then through the serial peripheral The interface (Serial Peripheral Interface, SPI) or I2C bus is transmitted to the device service platform.

In the following, the principle of the optical assembly to realize the light source differentiation is described in detail through the embodiments. Taking the light-emitting component 2 as an LED and detecting the heart rate by the PPG method, the signal received by the PD includes the AC part of the AC signal and the DC part of the DC signal. It consists of the following 8 parts. The signal composition received by the PD is shown in Figure 4:

1) The ambient light is stable. When the wearer moves, the illumination change of the ambient light into the PD caused by the jitter of the wearer is AC1;

2) When the wearer is stationary, the ambient light is changing, which causes the light entering the PD to change, which is AC2;

3) When the wearer is stationary and the ambient light is stable, the blood pulse pulse causes the ambient light to enter the PD illumination change, which is AC3;

4) When the wearer is stationary and the ambient light is stable, the pulse of blood causes the LED light to enter the PD's illumination change, which is AC4, and this part is a useful signal;

5) The ambient light is stable. When the wearer moves, the illumination change of the LED light into the PD caused by the wear jitter is AC5;

6) When the wearer is stationary and the ambient light is stable, the ambient light enters the stable part of the PD's illumination, which is DC1;

7) When the wearer is stationary and the ambient light is stable, the stray light of the LED light entering the PD from the inside of the device is DC2;

8) When the wearer is stationary and the ambient light is stable, the LED light enters the human body through the reflected light caused by non-vascular reflection and enters the PD, which is DC3.

Among them, AC4 is a useful signal, AC1, AC2, AC3, AC5 are dynamic interference signals, which will affect the contrast between the effective signal and the invalid signal:

Except AC4, all AC and DC signals are useless signals, which will affect the dynamic range of the sensor. Therefore, AC1, AC2, AC3, AC5, DC1, DC2, and DC3 all need to be reduced or suppressed.

In the embodiment of the present invention, taking the first polarizer 31 and the third polarizer 41 to filter out half of the ambient light as an example, the third polarizer 41 filters out the LED light and half of the ambient light, so that the What the second photodetector 4 obtains is: AC1-50%, AC2-50%, AC3-50%, DC1-50% signals; half of the ambient light is filtered through the first polarizer 31, but the LED light is fully passed, so that The first photodetector 3 acquires signals of AC1-50%, AC2-50%, AC3-50%, AC4-100%, AC5-100%, DC1-50%, DC2-100%, DC3-100% , As shown in the following table:

To	First photodetector	Second photodetector
AC1	50%	50%
AC2	50%	50%
AC3	50%	50%
AC4	100%	0%
AC5	100%	0%
DC1	50%	50%
DC2	100%	0%
DC3	100%	0%

As shown in FIG. 5, it is a schematic diagram of the light emitting component 2, the first photodetector 3, and the second photodetector 4 emitting or receiving light according to the embodiment of the present invention. The solid arrow indicates the light emitting component 2 The emitted light and the light reflected by the blood vessel 8, namely AC4, are useful signals; the dashed arrows include: AC1, AC2, AC3, AC5, DC1, DC2, and DC3, which are parts that need to be reduced or suppressed. Since the first polarizer filters out part of the ambient light but the light of the light-emitting component is all through, the third polarizer filters the light of the light-emitting component and part of the ambient light, so that the light source is distinguished.

It should be noted that the polarizer in the embodiment of the present invention may be synthetic resin, crystal, or liquid crystal. The above-mentioned polarization angle is just an example, and the angle can be flexibly set. It is necessary to ensure that the PPG detection is functionally distinguished from the light source through the orthogonal relationship of the polarizer. The optical components may be wearable devices such as smart watches, smart wristbands, earphones, and glasses.

In an embodiment of the present invention, the light-emitting component, the first photodetector, and the second photodetector are respectively provided with a polarizing plate, and the second polarizing plate can cause the light of the light-emitting component to be emitted in a fixed direction, Part of the ambient light is filtered through the first polarizer, but the light of the light-emitting component is fully passed, and the light of the light-emitting component and part of the ambient light are filtered through the third polarizer, so that the light source can be distinguished. In this way, by calculating the difference between the electrical signal output by the first photodetector and the electrical signal of the second photodetector, the detection signal after filtering out the ambient light can be obtained, and the ambient light can be filtered out more thoroughly. , And to a certain extent weaken the impact of wearing jitter, and ultimately improve the accuracy of PPG heart rate detection.

An embodiment of the present invention also provides an electronic device including the above-mentioned optical component. As shown in FIG. 6, an embodiment of the present invention also provides a method for detecting biometric data, which is applied to the above-mentioned electronic device, and includes:

Step 601: Obtain a first electrical signal output by the first photodetector and a second electrical signal output by the second photodetector;

Wherein, the first electrical signal includes: an electrical signal converted from emitted light of a light-emitting component and an electrical signal converted from ambient light; and the second electrical signal includes: an electrical signal converted from ambient light.

Step 602: Calculate the difference between the first electrical signal and the second electrical signal.

Taking the first electrical signal and the second electrical signal as voltage signals as an example, by obtaining their voltage values respectively, the light energy values they have taken in can be obtained. At this time, the difference between the voltage values will reflect all the values. The difference in light energy taken by the first photodetector and the second photodetector is subtracted from the light energy through the subtraction of the voltage value.

Step 603: Acquire biometric data according to the difference.

The difference is the signal value obtained after filtering the ambient light. The first photodetector and the second photodetector have the same amount of tweezers into the ambient light, so the difference between the two can be better filtered Ambient light, only the contribution of light-emitting components (such as LED light), improves the accuracy of biometric detection (such as heart rate detection).

Optionally, the biometric data detection method can be used in combination with light source modulation and difference frame method, wearing firmness enhancement method, LED/PD addition method, wavelength narrowband filtering method, etc., to further improve the accuracy of PPG detection.

The embodiment of the present invention realizes filtering of ambient light based on the polarization analyzer principle of polarized light, which can more thoroughly filter the ambient light, and reduce the influence of wearing jitter to a certain extent, and ultimately improve the accuracy of PPG biometric data detection. Rate.

As shown in FIG. 7, an embodiment of the present invention further provides an electronic device 700, including:

The first acquisition module 710 is configured to acquire the first electrical signal output by the first photodetector and the second electrical signal output by the second photodetector;

The calculation module 720 is configured to calculate the difference between the first electrical signal and the second electrical signal;

The second obtaining module 730 is configured to obtain biometric data according to the difference.

Optionally, the first electrical signal includes: an electrical signal converted from emitted light of a light-emitting component, and an electrical signal converted from ambient light;

The second electrical signal includes: an electrical signal converted from ambient light.

The electronic device provided by the embodiment of the present invention can implement each process implemented by the electronic device in the method embodiment of FIG. 6, and in order to avoid repetition, details are not described herein again.

The optical component of the embodiment of the present invention realizes the filtering of ambient light based on the principle of polarization analyzer of polarized light, which can more thoroughly filter the ambient light, reduce the influence of wearing jitter to a certain extent, and finally improve the detection of PPG biometric data The accuracy rate.

FIG. 8 is a schematic diagram of the hardware structure of an electronic device that implements various embodiments of the present invention.

The electronic device 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, a processor 810, and Power supply 811 and other components. Those skilled in the art can understand that the structure of the electronic device shown in FIG. 8 does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than those shown in the figure, or a combination of certain components, or different components. Layout. In the embodiments of the present invention, electronic devices include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, optical components, and pedometers.

Wherein, the radio frequency unit 801 is used to obtain the first electrical signal output by the first photodetector and the second electrical signal output by the second photodetector;

The processor 810 is configured to calculate the difference between the first electrical signal and the second electrical signal; and obtain biometric data according to the difference.

The electronic device of the embodiment of the present invention realizes the filtering of ambient light based on the polarization analyzer principle of polarized light, which can more thoroughly filter the ambient light, and reduce the influence of wearing jitter to a certain extent, and finally improve the detection of PPG biometric data The accuracy rate.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 801 can be used for receiving and sending signals in the process of sending and receiving information or talking. Specifically, the downlink data from the base station is received and processed by the processor 810; in addition, Uplink data is sent to the base station. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 801 can also communicate with the network and other devices through a wireless communication system.

Electronic devices provide users with wireless broadband Internet access through the network module 802, such as helping users to send and receive emails, browse web pages, and access streaming media.

The audio output unit 803 can convert the audio data received by the radio frequency unit 801 or the network module 802 or stored in the memory 809 into audio signals and output them as sounds. Moreover, the audio output unit 803 may also provide audio output related to a specific function performed by the electronic device 800 (e.g., call signal reception sound, message reception sound, etc.). The audio output unit 803 includes a speaker, a buzzer, a receiver, and the like.

The input unit 804 is used to receive audio or video signals. The input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processor 8041 is used to capture images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed. The processed image frame may be displayed on the display unit 806. The image frame processed by the graphics processor 8041 may be stored in the memory 809 (or other storage medium) or sent via the radio frequency unit 801 or the network module 802. The microphone 8042 can receive sound and can process such sound into audio data. The processed audio data can be converted into a format that can be sent to the mobile communication base station via the radio frequency unit 801 for output in the case of a telephone call mode.

The electronic device 800 further includes at least one sensor 805, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel 8061 according to the brightness of the ambient light. The proximity sensor can close the display panel 8061 and the display panel 8061 when the electronic device 800 is moved to the ear. / Or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of optical components (such as horizontal and vertical screen switching, related games , Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tap), etc.; sensor 805 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, Infrared sensors, etc., will not be repeated here.

The display unit 806 is used to display information input by the user or information provided to the user. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

The user input unit 807 can be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the optical assembly. Specifically, the user input unit 807 includes a touch panel 8071 and other input devices 8072. The touch panel 8071, also called a touch screen, can collect user touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 8071 or near the touch panel 8071. operate). The touch panel 8071 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch position, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 810, the command sent by the processor 810 is received and executed. In addition, the touch panel 8071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 8071, the user input unit 807 may also include other input devices 8072. Specifically, other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which will not be repeated here.

Further, the touch panel 8071 can be overlaid on the display panel 8061. When the touch panel 8071 detects a touch operation on or near it, it transmits it to the processor 810 to determine the type of the touch event, and then the processor 810 determines the type of touch event according to the touch. The type of event provides corresponding visual output on the display panel 8061. Although in FIG. 8, the touch panel 8071 and the display panel 8061 are used as two independent components to implement the input and output functions of the electronic device, in some embodiments, the touch panel 8071 and the display panel 8061 can be integrated The implementation of the input and output functions of the electronic device is not specifically limited here.

The interface unit 808 is an interface for connecting an external device and the electronic device 800. For example, the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) port, video I/O port, headphone port, etc. The interface unit 808 can be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the electronic device 800 or can be used to connect the electronic device 800 to an external device. Transfer data between devices.

The memory 809 can be used to store software programs and various data. The memory 809 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of mobile phones (such as audio data, phone book, etc.), etc. In addition, the memory 809 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The processor 810 is the control center of the electronic device. It uses various interfaces and lines to connect the various parts of the entire electronic device, runs or executes the software programs and/or modules stored in the memory 809, and calls the data stored in the memory 809. , Perform various functions of electronic equipment and process data, so as to monitor the electronic equipment as a whole. The processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface and application programs, etc., the modem The processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 810.

The electronic device 800 may also include a power source 811 (such as a battery) for supplying power to various components. Preferably, the power source 811 may be logically connected to the processor 810 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system. And other functions.

In addition, the electronic device 800 includes some functional modules not shown, which will not be repeated here.

Preferably, the embodiment of the present invention also provides an electronic device, including a processor 810, a memory 809, and a computer program stored on the memory 809 and running on the processor 810. When the computer program is executed by the processor 810, Each process of the embodiment of the above-mentioned biometric data detection method is realized, and the same technical effect can be achieved. In order to avoid repetition, it will not be repeated here.

The embodiment of the present invention also provides a computer-readable storage medium, and a computer program is stored on the computer-readable storage medium. In order to avoid repetition, I won’t repeat them here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.

It can be understood that the embodiments described in the present disclosure can be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, modules, units, sub-modules, sub-units, etc. can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (Digital Signal Processing, DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, Other electronic units or combinations thereof that perform the functions described in this application.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements that are not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the method described in each embodiment of the present invention.

The embodiments of the present invention are described above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present invention, many forms can be made without departing from the purpose of the present invention and the scope of protection of the claims, and they all fall within the protection of the present invention.

Claims (12)

1. An optical component including:

   Circuit board (1);

   A light-emitting component (2) arranged on the circuit board (1);

   A first photodetector (3) and a second photodetector (4) arranged on the circuit board (1);

   The light-emitting component (2), the first photodetector (3) and the second photodetector (4) are respectively provided with polarizing plates;

   Wherein, the polarization direction of the first polarizer (31) corresponding to the first photodetector (3) is the same as the polarization direction of the second polarizer (21) corresponding to the light-emitting component (2); The polarization direction of the third polarizer (41) corresponding to the two photodetectors (4) and the polarization direction of the second polarizer (21) are perpendicular to each other.
2. The optical assembly according to claim 1, wherein the optical assembly further comprises:

   A first retaining ring (5) arranged between the first photodetector (3) and the light-emitting component (2);

   A second retaining ring (6) arranged between the second photodetector (4) and the light-emitting component (2).
3. The optical assembly according to claim 1, wherein the first target polarizer is independently arranged; and/or the second target polarizer is integrated;

   Wherein, the first target polarizer includes: at least one of the first polarizer (31), the second polarizer (21), and the third polarizer (41); or, in the In the case that the second target polarizer includes: the first polarizer (31), the second polarizer (21), and the third polarizer (41), there are zero first target polarizers ；

   The second target polarizer includes: at least one of the first polarizer (31), the second polarizer (21) and the third polarizer (41); or, in the first polarizer (31), the second polarizer (21) and the third polarizer (41); The target polarizer includes: if the first polarizer (31), the second polarizer (21), and the third polarizer (41), there are zero second target polarizers;

   The first target polarizer and the second target polarizer include different polarizers.
4. The optical assembly according to claim 1, wherein:

   The second polarizer (21) faces the light emitting surface of the light emitting component (2), or the second polarizer (21) is integrated inside the light emitting component (2);

   The first polarizer (31) faces the light incident surface of the first photodetector (3), or the first polarizer (31) is integrated inside the first photodetector (3);

   The third polarizer (41) faces the light incident surface of the second photodetector (4), or the third polarizer (41) is integrated inside the second photodetector (4).
5. The optical assembly according to claim 1, wherein the second polarizer (21) and the light emitting component (2) are arranged at a first preset distance;

   The first polarizer (31) and the first photodetector (3) are arranged at a second preset distance apart;

   The third polarizer (41) and the second photodetector (4) are arranged at a third preset distance apart.
6. An electronic device comprising the optical component according to any one of claims 1-5.
7. A method for detecting biometric data, applied to the electronic device according to claim 6, comprising:

   Acquiring the first electrical signal output by the first photodetector and the second electrical signal output by the second photodetector;

   Calculating the difference between the first electrical signal and the second electrical signal;

   Acquire biometric data according to the difference.
8. 8. The biometric data detection method according to claim 7, wherein the first electrical signal comprises: an electrical signal converted from emitted light of a light-emitting component, and an electrical signal converted from ambient light;

   The second electrical signal includes: an electrical signal converted from ambient light.
9. An electronic device including:

   The first acquisition module is used to acquire the first electrical signal output by the first photodetector and the second electrical signal output by the second photodetector;

   A calculation module for calculating the difference between the first electrical signal and the second electrical signal;

   The second acquisition module is configured to acquire biometric data according to the difference.
10. 9. The electronic device according to claim 9, wherein the first electrical signal comprises: an electrical signal converted from emitted light of the light-emitting component and an electrical signal converted from ambient light;

    The second electrical signal includes: an electrical signal converted from ambient light.
11. An electronic device comprising a processor, a memory, and a computer program stored on the memory and capable of running on the processor. The computer program is executed by the processor to implement any of claims 7 to 8 One of the steps of the biometric data detection method.
12. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the biometric data detection according to any one of claims 7 to 8 is realized Method steps.

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