WO2019178793A1

WO2019178793A1 - In-display biometric identification device and electronic device

Info

Publication number: WO2019178793A1
Application number: PCT/CN2018/079921
Authority: WO
Inventors: 蒋鹏
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2018-03-22
Filing date: 2018-03-22
Publication date: 2019-09-26
Also published as: CN108513666B; CN108513666A

Abstract

Disclosed in the embodiments of the present application are an in-display biometric identification device and an electronic device. The in-display biometric identification device comprises: a micro hole provided below a display screen and used for transmitting reflected light from the upper part of the display screen to an aspherical transmission structure; the aspherical transmission structure provided below the micro hole, and including an aspherical mirror, the aspherical transmission structure being used for transmitting the reflected light to a photoelectric sensor array by means of the aspherical mirror; and the photoelectric sensor array used for detecting the reflected light. The technical solution of the embodiments of the present application can improve the efficiency of in-display biometric identification.

Description

Under-screen biometric device and electronic device

Technical field

Embodiments of the present application relate to the field of biometrics, and more particularly, to a screen biometric device and an electronic device.

Background technique

With the rapid development of the mobile phone industry, biometrics technology has received more and more attention from people, and more convenient on-screen biometrics technology, such as the practical use of fingerprint recognition technology under the screen, has become a popular requirement.

There are two main types of on-screen optical fingerprint sensor technology. The first is an off-screen optical fingerprinting technology based on a periodic microwell array that is susceptible to moiré. The second type is an optical fingerprint recognition technology based on microlens. The technology based on the traditional spherical lens is prone to image distortion, aberration, etc., and the thickness of the sensor is not easily thinned due to the focal length requirement of the microlens. Due to the existence of various problems mentioned above, the efficiency of the biometric recognition under the screen is affected.

Therefore, how to improve the efficiency of biometric recognition under the screen has become a technical problem to be solved urgently.

Summary of the invention

The embodiment of the present application provides an off-screen biometric device and an electronic device, which can improve the efficiency of biometric recognition under the screen.

In a first aspect, an off-screen biometric device is provided, comprising:

a micro hole disposed under the display screen for transmitting reflected light from above the display screen to the aspherical transmission structure;

An aspherical transmission structure disposed under the microhole, including an aspherical mirror for transmitting the reflected light to the photosensor array by the aspherical mirror;

A photosensor array for detecting the reflected light.

In the embodiment of the present application, the aspherical mirror is used for reflection transmission from the reflected light above the display screen, so that the aspherical mirror can be set according to the imaging requirements, and the aberration and distortion of the light transmitted to the photosensor array are reduced. The quality of the imaging for the biometric recognition of the screen is improved, thereby improving the efficiency of the biometric recognition under the screen.

In some possible implementations, the display screen is an OLED display.

In some possible implementations, the aspherical transmission structure includes a first aspherical mirror and a second aspherical mirror;

The first aspheric mirror is configured to reflect the reflected light to the second aspheric mirror;

The second aspheric mirror is for reflecting the reflected light to the photosensor array.

In some possible implementations, the first aspheric mirror and the second aspheric mirror are both concave aspheric mirrors.

In some possible implementations, the first aspheric mirror is a concave aspheric mirror, and the second aspheric mirror is a planar mirror.

In some possible implementations, the first aspherical mirror and the second aspherical mirror are set according to imaging requirements of the under-screen biometric device.

In some possible implementations, the imaging requirements include aberration requirements and distortion requirements.

Due to the adjustability of the aspherical mirror for aberrations and distortion, the aspherical transmission structure using the aspherical mirror can eliminate or reduce aberrations and distortion with respect to the structure using the spherical lens.

In some possible implementations, the aspherical transmission structure further includes a lens disposed between the first aspherical mirror and the second aspherical mirror.

In some possible implementations, the aspherical transmission structure is a flat structure.

The flat aspherical transmission structure is easy to install in combination with other components, making the device small, reliable and stable.

In some possible implementations, the material in the aspherical transmission structure is a transparent resin or glass.

In some possible implementations, the number of micropores is one.

The use of a single microwell to collect optical signals can avoid the effects of moiré that may occur in a microporous array.

In some possible implementations, the off-screen biometric device further includes:

a light shielding layer disposed on an outer surface of the aspherical transmission structure except a region corresponding to the microhole, a region corresponding to the aspherical mirror, and a region outside the region corresponding to the photosensor array.

In some possible implementations, the micro holes are disposed in the light shielding layer.

An optical filter disposed between the aspherical transmission structure and the photosensor array for filtering red light in the reflected light.

In some possible implementations, the photosensor array is an array of photodiodes.

The technical solution of the embodiment of the present application can avoid the influence of the moire fringes without using the periodic micro-hole array; the aspherical mirror is not used for the spherical lens, and the problems such as aberration and distortion can be avoided; The aspherical transmission structure can reduce the thickness of the device and realize an ultra-thin screen biometric device.

In a second aspect, an electronic device is provided, comprising:

A display screen and the underlying biometric device of the first aspect or any possible implementation of the first aspect.

In some possible implementations, the display screen is an organic light emitting diode display, including a plurality of organic light emitting diode light sources, wherein the underlying biometric device uses at least a portion of an organic light emitting diode light source as an excitation light source for biometric recognition. .

DRAWINGS

1 is a schematic plan view of an electronic device to which the present application is applicable.

Figure 2 is a partial cross-sectional view of the electronic device of Figure 1 taken along line A'-A'.

3 is a schematic diagram of an under-screen biometric device of an embodiment of the present application.

4 is a schematic diagram of a screen biometric device of another embodiment of the present application.

FIG. 5 is a schematic diagram of a screen biometric device according to still another embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

As electronic devices enter the era of full screens, the biometric collection area on the front of electronic devices is squeezed by a full screen, so under-display or under-screen biometrics technology is receiving more and more attention. The under-screen biometric recognition technology refers to installing a biometric identification module (such as a fingerprint recognition module) under the display screen, thereby realizing biometric recognition operation in the display area of the display screen, without displaying the display on the front side of the electronic device. The biometric collection area is set in the area outside the area.

Under-the-screen biometrics use fingerprints returned from the top surface of the device display component for fingerprint sensing and other sensing operations. The returned light carries information of an object (eg, a finger) in contact with the top surface, and a particular optical sensor module located below the display screen is achieved by capturing and detecting the returned light. The design of the optical sensor module can be such that the desired optical imaging is achieved by properly configuring the optical elements for capturing and detecting the returned light.

It should be understood that the technical solutions of the embodiments of the present application can be applied to various electronic devices, such as portable or mobile computing devices such as smart phones, notebook computers, tablet computers, game devices, and electronic databases, automobiles, and bank ATMs (Automated Teller Machine). Other electronic devices such as ATMs, but the embodiments of the present application are not limited thereto.

It should also be understood that the technical solution of the embodiment of the present application can perform other biometrics, such as the identification of the living body, in addition to the fingerprint recognition, which is not limited by the embodiment of the present application.

FIG. 1 and FIG. 2 are schematic diagrams showing an electronic device 100 to which an off-screen biometric device can be applied. FIG. 1 is a front view of the electronic device 100, and FIG. 2 is an A--A of the electronic device 100 shown in FIG. 'Some part of the cross-sectional structure diagram.

As shown in FIG. 1 and FIG. 2, the electronic device 100 can include a display screen 120 and a biometric identification module 140, wherein the display screen 120 has a display area 102, and the biometric identification module 140 is disposed on the display. Below the screen 120.

The display screen 120 may be a self-illuminating display screen that uses a display unit having self-illumination as a display pixel. For example, the display 120 can be an Organic Light-Emitting Diode (OLED) display or a Micro-LED display. In other alternative embodiments, the display screen 120 may also be a liquid crystal display (LCD) or other passive light-emitting display. This embodiment of the present application does not limit this.

On the other hand, the display screen 120 is specifically a touch display screen, which can not only display the screen but also detect the touch or pressing operation of the user, thereby providing the user with a human-computer interaction interface. For example, in an embodiment, the electronic device 100 may include a touch sensor, and the touch sensor may be specifically a touch panel (TP), which may be disposed on the surface of the display screen 120, or may be partially Integrated or integrated into the display screen 120 to form the touch display.

The biometric identification module 140 can be specifically an optical biometric identification module, such as an optical fingerprint module, which is mainly used for collecting biometric information (such as fingerprint image information) of a user. In the embodiment of the present application, the biometric identification module 140 can be disposed at least in a local area below the display screen 120, so that the biometric collection area (or sensing area) 130 of the biometric identification module 140 is 130. At least partially located in the display area 102 of the display screen 120.

As an embodiment, the biometric identification module 140 may specifically include an optical biometric sensor having an optical sensing array, such as an optical fingerprint sensor; the optical sensing array includes a plurality of optical sensing units, and the optical sensing array The area in which it corresponds corresponds to the biometric collection area 130 of the biometric identification module 140. As shown in FIG. 1 , the biometric collection area 130 is located in the display area 102 of the display screen 120. Therefore, when the user needs to unlock the electronic device 100 or other biometrics, the user only needs to A biometric input operation can be achieved by pressing a finger on the biometric collection area 130 of the display screen 120. Since the biometric collection detection can be implemented inside the display area 102 of the display screen 120, the electronic device 100 adopting the above structure can set a fingerprint button (such as a Home button) without requiring a space on the front side thereof, so that a full screen scheme can be adopted. Accordingly, the display area 102 of the display screen 120 can be substantially extended to the entire front side of the electronic device 100.

In the embodiment of the present application, the display screen 120 is an OLED display, and the display 120 has an array of OLED display units arranged in an array, and the biometric module 140 can utilize the OLED display 120. An OLED display unit (ie, an OLED light source) located in the biometric collection area 130 serves as an excitation light source for biometric detection recognition. Of course, it should be understood that in other alternative implementations, the biometric identification module 140 may also employ an internal light source or an external light source to provide an optical signal for biometric detection identification. In this case, the screen biometric device can be applied not only to a self-illuminating display such as an OLED display, but also to a non-self-illuminating display such as a liquid crystal display or other passive illuminated display. Moreover, the optical sensing array of the biometric identification module 140 is specifically a photo detector array (or photodetector array), which includes a plurality of photodetectors distributed in an array, the light The detector can be used as an optical sensing unit as described above.

When a finger touches, presses, or approaches (collectively referred to as pressing in the present application for convenience of description), the light emitted by the display unit of the biometric collection area 130 reflects and forms a reflection on the finger when the biometric collection area 130 is in the biometric collection area 130. Light, wherein the reflected light can carry biometric information of a user's finger. For example, after the light is reflected by the fingerprint of the surface of the user's finger, since the reflected light of the fingerprint and the grain of the finger fingerprint are different, the reflected light is carried with the fingerprint information of the user. The reflected light is returned to the display screen 120 and received by the photodetector array of the biometric identification module 140 below it and converted into a corresponding electrical signal, ie, a biometric detection signal. The electronic device 100 can obtain biometric information of the user based on the biometric detection signal, and can further perform biometric matching verification, thereby completing identity verification of the current user to confirm whether it has authority to the electronic device 100. Take the appropriate action.

In other alternative embodiments, the biometric identification module 140 can also be disposed over the entire area below the display screen 120 to extend the biometric collection area 130 to the entire display area of the display screen 120. 102, realizing full screen biometric recognition.

It should be understood that, in a specific implementation, the electronic device 100 further includes a protective cover 110. The cover 110 may be a transparent cover, such as a glass cover or a sapphire cover, which is located on the display 120. The upper surface of the electronic device 100 is covered and the surface of the protective cover 110 may also be provided with a protective layer. Therefore, in the embodiment of the present application, the so-called finger pressing of the display screen 120 may actually refer to the cover plate 110 pressed by the finger above the display screen 120 or the surface of the protective layer covering the cover plate 110.

On the other hand, a circuit board 150, such as a Flexible Printed Circuit (FPC), may be disposed under the biometric module 140. The biometric module 140 may be soldered to the chassis. The circuit board 150 is described and electrically interconnected and signaled with other peripheral circuits or other components of the electronic device 100 by the circuit board 150. For example, the biometric identification module 140 can receive a control signal of the processing unit of the electronic device 100 through the circuit board 150, and can also output the biometric detection signal to the A processing unit or control unit of the electronic device 100 or the like.

In some implementations, the biometric identification module 140 uses a periodic micro-hole array or a spherical lens to transmit light onto the sensing array, which is susceptible to moiré fringes or prone to image distortion, aberrations, and the like. In view of this, the embodiment of the present application provides an improved technical solution for performing optical transmission modulation by using an aspherical mirror to avoid the above problem, thereby improving the efficiency of the under-screen biometric recognition.

FIG. 3 shows a schematic diagram of the under-the-screen biometric device 300 of the embodiment of the present application.

As shown in FIG. 3, the under-screen biometric device 300 can include a microhole 320, an aspherical transmission structure 330, and a photosensor array 340.

The microholes 320 are disposed below the display screen 310 for transmitting reflected light from above the display screen 310 to the aspherical transmission structure 330.

For example, after the light emitted by the display screen 310 is reflected by the finger above the display screen 310, a portion of the reflected light may be transmitted through the micro holes 320 to the aspherical transmission structure 330.

The display screen 310 may be the display screen 120 shown in FIG. 1 and FIG. 2, and the related description may refer to the foregoing description of the display screen 120. For brevity, no further details are provided herein.

The aspherical transmission structure 330 is disposed below the micro holes 320. The aspherical transmission structure 330 includes an aspherical mirror, such as a first aspherical mirror 331 and a second aspherical mirror 332. The aspherical transmission structure 330 is configured to transmit the reflected light to the photosensor array 340 through the aspherical mirror.

Photoelectric sensor array 340 is used to detect the reflected light so that imaging can be achieved based on the reflected light.

In the embodiment of the present application, the aspherical mirror is used for reflection transmission from the reflected light above the display screen, so that the aspherical mirror can be set according to the imaging requirements, and the aberration and distortion of the light transmitted to the photosensor array are reduced. The quality of imaging for off-screen biometric recognition is improved, thereby improving the efficiency of off-screen biometric recognition.

Optionally, in an embodiment of the present application, as shown in FIG. 3, the under-the-screen biometric device 300 further includes a light shielding layer 350.

The light shielding layer 350 is disposed on an outer surface of the aspherical transmission structure 330 except a region corresponding to the microhole 320, a region corresponding to the aspherical mirror, and a region outside the region corresponding to the photosensor array 340.

The light shielding layer 350 is for eliminating stray light. The blackout layer 350 may be a black material, such as a black foam, which is not limited by the embodiment of the present application.

The micro holes 320 are disposed in the light shielding layer 350 to form a light transmitting region. That is, light enters the aspherical transmission structure 330 from the microvia 320, and the aspherical transmission structure 330 emerges from a region (which may be referred to as a light exiting region) corresponding to the photosensor array 340. Other areas of the outer surface of the aspherical transmission structure 330 are opaque.

Optionally, in an embodiment of the present application, the number of the micro holes 320 in the under-the-screen biometric device 300 is 1. That is to say, in the embodiment of the present application, a single microhole is used to collect the optical signal, thereby avoiding the influence of the moire fringes that the microporous array may generate.

Alternatively, the aspherical transmission structure 330 may be a flat structure. The flat aspherical transmission structure is easy to install in combination with other components, making the device small, reliable and stable.

The material in the aspherical transmission structure 330 is a transparent material, for example, may be a transparent resin or a glass, but the embodiment of the present application is not limited thereto.

In the embodiment of the present application, the aspherical transmission structure 330 transmits the reflected light to the photosensor array 340 through an aspherical mirror. The imaging structure of the aspherical mirror is an aspherical structure, and for example, the aspherical mirror may include a freeform mirror and a plane mirror. The aspherical mirror can realize the reflective layer by means of aluminizing or silver plating, but the embodiment of the present application is not limited thereto.

The number of the aspherical mirrors included in the aspherical transmission structure 330 is not limited in the embodiment of the present application. Alternatively, as an embodiment of the present application, the aspherical transmission structure 330 may include two aspherical mirrors, such as a first aspherical mirror 331 and a second aspherical mirror 332.

The first aspheric mirror 331 is configured to reflect the reflected light to the second aspheric mirror 332.

The second aspheric mirror 332 is configured to reflect the reflected light to the photosensor array 340.

For example, as shown in FIG. 3, the first aspheric mirror 331 can convert light in the vertical direction into light in the horizontal direction; the second aspheric mirror 332 can convert light in the horizontal direction into light in the vertical direction.

Optionally, in an embodiment of the present application, as shown in FIG. 3, the first aspheric mirror 331 and the second aspheric mirror 332 are both concave aspheric mirrors.

Optionally, in an embodiment of the present application, as shown in FIG. 4, the first aspheric mirror 331 is a concave aspheric mirror, and the second aspheric mirror 332 is a plane mirror.

Alternatively, the first aspheric mirror 331 and the second aspheric mirror 332 may be set according to imaging requirements of the under-the-screen biometric device 300.

Specifically, the first aspheric mirror 331 and the second aspheric mirror 332 are configured to transmit and modulate the reflected light to make the final imaging meet imaging requirements, such as aberration requirements and distortion requirements. . That is, the setting parameters of the first aspheric mirror 331 and the second aspheric mirror 332 may be such that the first aspheric mirror 331 and the second aspheric mirror 332 are eliminated or subtracted. Small imaging aberrations and distortions.

Due to the adjustability of the aspherical mirror for aberrations and distortion, the aspherical transmission structure 330 employing an aspherical mirror can eliminate or reduce aberrations and distortion relative to a structure employing a spherical lens. In addition, the specific structure of the aspherical transmission structure 330 is not limited in the embodiment of the present application, and various possible configurations may be employed, and are not limited to the structures shown in FIGS. 3 and 4.

For example, in addition to including an aspherical mirror, the aspherical transmission structure 330 can also include a lens. As an embodiment of the present application, a lens may be disposed between the first aspherical mirror 331 and the second aspherical mirror 332. The aspherical mirror and the lens in the aspherical transmission structure 330 collectively modulate the reflected light to eliminate or reduce imaging aberrations and distortion.

In other alternative embodiments, the aspherical transmission structure 330 may also include three, four or even a plurality of aspherical mirrors, and the three, four or even a plurality of aspherical mirrors may be specifically designed by optical path. The reflected light is transmitted to the photosensor array 340.

On the other hand, before the reflected light reaches the photosensor array 340, it can also be filtered by an optical filter to filter out unwanted light. Optionally, as shown in FIG. 5, as one embodiment of the present application, the screen biometric device 300 may further include: an optical filter 360.

The optical filter 360 is disposed between the aspherical transmission structure 330 and the photosensor array 340, and the optical filter 340 is configured to filter out red light in the reflected light.

An optical filter is an optical device that filters out unwanted optical bands. In the above embodiment, the optical filter 360 is used to filter out red light. It should be understood that if it is necessary to filter out other colors of light, a corresponding optical filter can be set, which will not be repeated here.

In the embodiment of the present application, the photosensor array 340 may also be referred to as a photodetector array, which can detect the light transmitted by the aspherical transmission structure 330. For example, the photosensor array 340 can employ an array of photodiodes that convert optical signals into electrical signals through photodiodes so that imaging can be performed based on electrical signals.

The above-described screen biometric device 300 may also be referred to as a biometric module. The display 310 and the biometric module may be connected by an adhesive layer or may be connected by other connection methods, which is not limited in this embodiment of the present application. In addition, the embodiment of the present application does not limit the connection manner between the components in the screen biometric device 300.

The embodiment of the present application further provides an electronic device, which may include a display screen and the above-described screen biometric device in various embodiments of the present application.

The electronic device can be any electronic device having a display screen, which implements the on-screen biometric recognition by using the technical solution of the embodiment of the present application. The display screen may be an organic light emitting diode display screen comprising a plurality of organic light emitting diode light sources, wherein the underlying biometric identification device employs at least a portion of an organic light emitting diode light source as an excitation source for biometric recognition.

It should be understood that the specific examples in the embodiments of the present application are only for the purpose of understanding the embodiments of the present application.

It is understood that the terms used in the embodiments of the present application and the appended claims are for the purpose of describing particular embodiments and are not intended to limit the embodiments. For example, the singular forms "a", "the" and "the"

Those of ordinary skill in the art will appreciate that the elements of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate that the hardware and software are interchangeable. In the above description, the composition and steps of the examples have been generally described in terms of functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

In the several embodiments provided by the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be in essence or part of the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any equivalents can be easily conceived by those skilled in the art within the technical scope disclosed in the present application. Modifications or substitutions are intended to be included within the scope of the present application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

An off-screen biometric device, comprising:

a micro hole disposed under the display screen for transmitting reflected light from above the display screen to the aspherical transmission structure;

An aspherical transmission structure disposed under the microhole, comprising at least one aspherical mirror for transmitting the reflected light to the photosensor array by the aspherical mirror;

A photosensor array for detecting the reflected light.
The under-screen biometric device according to claim 1, wherein the aspherical transmission structure comprises a first aspherical mirror and a second aspherical mirror;

The first aspheric mirror is configured to reflect the reflected light to the second aspheric mirror;

The second aspheric mirror is for reflecting the reflected light to the photosensor array.
The under-the-counter biometric device of claim 2, wherein the first aspherical mirror and the second aspherical mirror are both concave aspheric mirrors.
The under-the-counter biometric device according to claim 2, wherein the first aspheric mirror is a concave aspheric mirror, and the second aspheric mirror is a plane mirror.
The under-screen biometric device according to any one of claims 2 to 4, wherein the first aspherical mirror and the second aspherical mirror are based on the under-screen biometric recognition The imaging requirements of the device are set.
The under-screen biometric device of claim 5 wherein said imaging requirements include aberration requirements and distortion requirements.
The under-screen biometric device according to any one of claims 2 to 6, wherein the aspherical transmission structure further comprises a lens, the lens being disposed on the first aspheric mirror and the Between the second aspheric mirrors.
The under-screen biometric device according to any one of claims 1 to 7, wherein the aspherical transmission structure is a flat structure.
The under-screen biometric device according to any one of claims 1 to 8, wherein the material in the aspherical transmission structure is a transparent resin or glass.
The under-screen biometric device according to any one of claims 1 to 9, wherein the number of the micropores is one.
The under-the-scement biometrics device according to any one of claims 1 to 10, further comprising:

a light shielding layer disposed on an outer surface of the aspherical transmission structure except a region corresponding to the microhole, a region corresponding to the aspherical mirror, and a region outside the region corresponding to the photosensor array.
The under-screen biometric device according to claim 11, wherein the microholes are disposed in the light shielding layer.
The under-the-spot biometrics device according to any one of claims 1 to 12, wherein the under-the-screen biometrics recognition device further comprises:

An optical filter disposed between the aspherical transmission structure and the photosensor array for filtering red light in the reflected light.
An electronic device, comprising: a display screen;

The under-screen biometric device according to any one of claims 1 to 13.
The electronic device according to claim 14, wherein the display screen is an organic light emitting diode display screen comprising a plurality of organic light emitting diode light sources, wherein the underlying biometric identification device employs at least a portion of an organic light emitting diode light source as An excitation source for biometric identification.