WO2022000795A1

WO2022000795A1 - Display module and electronic device

Info

Publication number: WO2022000795A1
Application number: PCT/CN2020/115090
Authority: WO
Inventors: 徐盼; 张洲; 马长文; 查国伟
Original assignee: 武汉华星光电技术有限公司
Priority date: 2020-06-28
Filing date: 2020-09-14
Publication date: 2022-01-06
Also published as: CN111681551A; CN111681551B

Abstract

A display module (100) and an electronic device (200). The display module (100) comprises a display area (101), a signal detection module (30), and a texture recognition module (40). The display area (101) comprises multiple pixel units (10) and multiple light-emitting subunits (20) having one-to-one correspondence to the pixel units (10); each of the pixel units (10) comprises multiple pixels (11); each pixel (11) comprises a first light-emitting element (111); each light-emitting subunit (20) comprises a second light-emitting element (21). The second light-emitting element (21) is used for emitting near-infrared light; the signal detection module (30) is used for processing, when near-infrared light reflected by an object to be checked is received, the received near-infrared light to form a detection current; the texture recognition module (40) is used for processing the detection current to obtain biological texture information of the object to be checked.

Description

Display modules and electronic equipment

technical field

The present application relates to the field of display technology, and in particular, to a display module and an electronic device.

Background technique

At present, biosafety identification technology is being applied in more and more fields, such as mobile devices, gate security inspection, card punching machines, vault security locks, etc. Among them, the biometric identification system has the highest safety factor and better experience. The biological texture is an example of palm vein, and palm vein recognition has high-performance features such as anti-simulation and forgery, unlimited ambient light, and no requirement for palm cleanliness.

The current palm vein identification system needs to irradiate the palm with near-infrared light, and the hemoglobin of red blood cells will absorb a large amount of near-infrared light, and then the image is collected and processed by the image sensor, and then transmitted to the identification processing system to identify the palm vein.

technical problem

However, due to the complex structure of the existing biotexture recognition system, it cannot be applied to the display module.

technical solutions

Embodiments of the present application provide a display module and an electronic device, which can simplify the structure of a biological texture recognition system, so that it can be applied to a display module.

The embodiment of the present application provides a display module, including:

Display area, which includes:

a plurality of pixel units, the pixel units include a plurality of pixels, each of the pixels includes a first light-emitting element;

a plurality of light-emitting sub-units, the light-emitting sub-units include a second light-emitting element, the second light-emitting element is used for emitting near-infrared light; the light-emitting sub-units correspond to the pixel units;

The signal detection module is used to process the received near-infrared light when receiving the near-infrared light reflected by the object to be detected to form a detection current;

The texture identification module is used for processing the detection current to obtain biological texture information of the object to be detected.

The present invention also provides an electronic device comprising the above-mentioned display module.

beneficial effect

The display module and the electronic device according to the embodiments of the present application include a display area, which includes: a plurality of pixel units, the pixel units include a plurality of pixels, each of the pixels includes a first light-emitting element; a plurality of light-emitting sub-units, The light-emitting subunit includes a second light-emitting element, and the second light-emitting element is used to emit near-infrared light; the light-emitting subunit corresponds to the pixel unit; the signal detection module is used for receiving the reflected light from the object to be detected. In the case of near-infrared light, the received near-infrared light is processed to form a detection current; the texture recognition module is used to process the detection current to obtain the biological texture information of the object to be detected; A light-emitting sub-unit, a signal detection module and a texture identification module are added in the system, thus simplifying the structure of biotexture identification, so that the biotexture identification technology can be applied in the display module, which improves the security and flexibility.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a display module provided by an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a signal detection module provided by an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a display area provided by an embodiment of the present application.

FIG. 4 is a schematic structural diagram of a display area provided by another embodiment of the present application.

FIG. 5 is a schematic structural diagram of a display area provided by another embodiment of the present application.

FIG. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Embodiments of the present invention

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or reference letters in different instances for the purpose of simplicity and clarity, and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Please refer to FIG. 1 to FIG. 4 . FIG. 1 is a schematic structural diagram of a display module according to an embodiment of the present invention.

As shown in FIG. 1 , the display module 100 of this embodiment includes: a display area 101 , a signal detection module 30 and a texture recognition module 40 .

The display area 101 includes a plurality of pixel units 10 and a plurality of light-emitting sub-units 20 .

The pixel unit 10 includes a plurality of pixels 11, and each of the pixels 11 includes a first light-emitting element 111; the first light-emitting element 111 may be one of a light-emitting diode, a micro-light-emitting diode, and a light-emitting chip.

The light-emitting sub-unit 20 includes a second light-emitting element 21, and the second light-emitting element 21 is used to emit near-infrared light; the light-emitting sub-unit 20 corresponds to the pixel unit 10; in a preferred embodiment, the The light-emitting sub-units 20 are in one-to-one correspondence with the pixel units 10 . In other embodiments, a plurality of light-emitting sub-units 20 correspond to one pixel unit 10, of course, the correspondence between the light-emitting sub-units 20 and the pixel unit 10 is not limited to this. In one embodiment, the second light-emitting element 21 may include one of a light-emitting diode and a light-emitting chip. In a preferred embodiment, in order to reduce the area of the display module, the area of the light-emitting sub-unit 20 is smaller than the area of the pixel 11 . Preferably, the area of the light-emitting subunit 20 is less than or equal to half of the area of the pixel 11 .

The signal detection module 30 is configured to process the received near-infrared light to form a detection current when receiving the near-infrared light reflected by the object to be detected, wherein the object to be detected is, for example, a palm.

The texture identification module 40 is configured to process the detection current to obtain biological texture information of the object to be detected. In one embodiment, the biological texture information may include at least one of palm vein information and palm print information. Of course, the biological texture information is not limited to this.

In one embodiment, with reference to FIG. 2 , the display area further includes a control line G1 and a signal output line D1;

The signal detection module 30 includes a photodiode PD, a driving transistor T1 and a capacitor C1;

The first end of the photodiode PD and one end of the capacitor C1 are both connected to a reference voltage V1; the reference voltage V1 ranges from 0 to 5V. The second end of the photodiode PD and the other end of the capacitor C1 are both connected to the source of the drive transistor T1, the drain of the drive transistor T1 is connected to the signal output line D1, and the drive transistor The gate of T1 is connected to the control line G1 ; the signal output line D1 is connected to the texture identification module 40 . In one embodiment, the first end is, for example, an anode, and the second end is, for example, a cathode.

In one embodiment, as shown in FIG. 3 and FIG. 4 , the display area 101 further includes a plurality of scan lines G2 and a plurality of data lines D2;

1 , the light-emitting sub-unit 20 further includes a light-emitting driving module 22, and the light-emitting driving module 22 is configured to drive the second light-emitting element 21 to emit light;

The pixel 11 further includes: a pixel driving module 112, and the pixel driving module 112 is configured to drive the first light-emitting element 111 to emit light;

As shown in FIG. 3 , the light-emitting driving modules 22 of the light-emitting subunits 20 located in the same row and the pixel driving modules 112 of the pixels 11 correspond to the scanning line G2, that is, the light-emitting subunits 20 located in the same row are driven to emit light. The module 22 and the pixel driving module 112 of the pixel 11 and the scan line G2 are all connected to the same scan line G2, in other words, the light-emitting driving module 22 of the light-emitting subunit 20 located in the same row and the pixels of the pixel 11 The driving modules 112 share a scan line G2. In one embodiment, the light-emitting driving modules 22 of the light-emitting subunits 20 located in the same column correspond to the data lines D2; and the pixel driving modules 112 of the pixels 11 located in the same column also correspond to the data lines D2. In another embodiment, as shown in FIG. 4 , the light-emitting driving modules 22 of the light-emitting subunits 20 and the pixel driving modules 112 of the pixels 11 located in the same column correspond to the data lines D2 . That is, the light-emitting driving modules 22 of the light-emitting subunits 20 in the same column and the pixel driving modules 112 of the pixels 11 are connected to the same data line D2. In other words, the light-emitting subunits 20 in the same column emit light. The driving module 22 and the pixel driving module 112 of the pixel 11 share the data line D2.

In one embodiment, as shown in FIG. 5 , each light-emitting driving module 22 includes a first transistor T2 and a second transistor T3, wherein the gate of the first transistor T2 is connected to the scan line G2, and the source is connected to the data line D2. , the gate of the second transistor T3 is connected to the drain of the first transistor T2, the source of the second transistor T3 is connected to the second power line 44, the drain of the second transistor T3 is connected to the second end of the second light-emitting element 21 For connection, the first end of the second light-emitting element 21 is connected to the first power line 43 . The first power supply line 43 is used for inputting a first power supply voltage, and the second power supply line 44 is used for inputting a second power supply voltage, and the first power supply voltage is greater than the second power supply voltage. The first end is, for example, an anode, and the second end is, for example, a cathode.

It can be understood that the structure of the pixel driving module 112 is similar to this, and details are not repeated here.

It can be understood that FIG. 1 to FIG. 5 only provide an example, and do not limit the present invention.

Please refer to FIG. 6 , which is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 200 may include a display module 100 , a control circuit 60 and a casing 70 . It should be noted that the electronic device 200 shown in FIG. 6 is not limited to the above contents, and may also include other devices, such as a camera, an antenna structure, a fingerprint unlocking module, and the like.

The display module 100 is disposed on the casing 70 .

In some embodiments, the display module 100 can be fixed to the casing 70 , and the display module 100 and the casing 70 form a closed space to accommodate devices such as the control circuit 60 .

In some embodiments, the casing 70 may be made of a flexible material, such as a plastic casing or a silicone casing.

Wherein, the control circuit 60 is installed in the casing 70, the control circuit 60 can be the main board of the electronic device 200, and the control circuit 60 can be integrated with a battery, an antenna structure, a microphone, a speaker, a headphone interface, a universal serial bus interface, One, two or more of functional components such as camera, distance sensor, ambient light sensor, receiver, and processor.

The display module 100 is installed in the casing 70 , and at the same time, the display module 100 is electrically connected to the control circuit 60 . The display module 100 may include a display area and a non-display area. The display area may be used to display the screen of the electronic device 200 or for the user to perform touch manipulation or the like. This non-display area can be used to set various functional components.

The electronic devices include but are not limited to mobile phones, tablet computers, computer monitors, game consoles, televisions, display screens, wearable devices, and other household appliances or household appliances with display functions.

Claims

A display module, comprising:

Display area, which includes:

a plurality of pixel units, the pixel units include a plurality of pixels, each of the pixels includes a first light-emitting element;

a plurality of light-emitting sub-units, the light-emitting sub-units include a second light-emitting element, the second light-emitting element is used for emitting near-infrared light; the light-emitting sub-units correspond to the pixel units;

a signal detection module for processing the received near-infrared light to form a detection current when receiving the near-infrared light reflected by the object to be detected; and

The texture identification module is used for processing the detection current to obtain biological texture information of the object to be detected.
The display module according to claim 1, wherein the display area further comprises a control line and a signal output line;

The signal detection module includes a photodiode, a driving transistor and a capacitor;

Both the first end of the photodiode and one end of the capacitor are connected to a reference voltage;

The second end of the photodiode and the other end of the capacitor are both connected to the source of the drive transistor, the drain of the drive transistor is connected to the signal output line, and the gate of the drive transistor is connected to the drive transistor. The control line is connected; the signal output line is connected with the texture identification module.
The display module of claim 1, wherein

The area of the light-emitting subunit is smaller than that of the pixel.
The display module according to claim 3, wherein

The area of the light-emitting subunit is less than or equal to half of the area of the pixel.
The display module according to claim 1, wherein the display area further comprises a plurality of scan lines and a plurality of data lines;

The light-emitting sub-unit further includes a light-emitting driving module, and the light-emitting driving module is used to drive the second light-emitting element to emit light;

The pixel further includes: a pixel driving module configured to drive the first light-emitting element to emit light;

The light-emitting driving modules of the light-emitting subunits and the pixel driving modules of the pixels located in the same row correspond to the scan lines.
The display module of claim 5, wherein

The light-emitting driving modules of the light-emitting subunits located in the same column correspond to the data lines;

Pixel driving modules in pixels located in the same column also correspond to the data lines.
The display module of claim 5, wherein

The light-emitting driving modules of the light-emitting subunits and the pixel driving modules of the pixels located in the same column correspond to the data lines.
The display module of claim 1, wherein

The light-emitting sub-units correspond to the pixel units one-to-one.
The display module of claim 1, wherein

The biological texture information includes at least one of palm vein information and palm print information.
The display module of claim 1, wherein

The second light-emitting element includes one of a light-emitting diode and a light-emitting chip.
An electronic device, comprising a display module, comprising:

Display area, which includes:

a plurality of pixel units, the pixel units include a plurality of pixels, each of the pixels includes a first light-emitting element;

a plurality of light-emitting sub-units, the light-emitting sub-units include a second light-emitting element, the second light-emitting element is used for emitting near-infrared light; the light-emitting sub-units correspond to the pixel units;

a signal detection module for processing the received near-infrared light to form a detection current when receiving the near-infrared light reflected by the object to be detected; and

The texture identification module is used for processing the detection current to obtain the biological texture information of the object to be detected.
The electronic device according to claim 11, wherein the display area further comprises control lines and signal output lines;

The signal detection module includes a photodiode, a driving transistor and a capacitor;

Both the first end of the photodiode and one end of the capacitor are connected to a reference voltage;

The second end of the photodiode and the other end of the capacitor are both connected to the source of the drive transistor, the drain of the drive transistor is connected to the signal output line, and the gate of the drive transistor is connected to the drive transistor. The control line is connected; the signal output line is connected with the texture identification module.
The electronic device of claim 11, wherein

The area of the light-emitting subunit is smaller than that of the pixel.
The electronic device of claim 13, wherein

The area of the light-emitting subunit is less than or equal to half of the area of the pixel.
The electronic device according to claim 11, wherein the display area further comprises a plurality of scan lines and a plurality of data lines;

The light-emitting sub-unit further includes a light-emitting driving module, and the light-emitting driving module is used to drive the second light-emitting element to emit light;

The pixel further includes: a pixel driving module configured to drive the first light-emitting element to emit light;

The light-emitting driving modules of the light-emitting subunits and the pixel driving modules of the pixels located in the same row correspond to the scan lines.
The electronic device of claim 15, wherein

The light-emitting driving modules of the light-emitting subunits located in the same column correspond to the data lines;

Pixel driving modules in pixels located in the same column also correspond to the data lines.
The electronic device of claim 15, wherein

The light-emitting driving modules of the light-emitting subunits and the pixel driving modules of the pixels located in the same column correspond to the data lines.
The electronic device of claim 11, wherein

The light-emitting sub-units correspond to the pixel units one-to-one.
The electronic device of claim 11, wherein

The biological texture information includes at least one of palm vein information and palm print information.
The electronic device of claim 11, wherein

The second light-emitting element includes one of a light-emitting diode and a light-emitting chip.