WO2018082401A1

WO2018082401A1 - Display device and electronic device

Info

Publication number: WO2018082401A1
Application number: PCT/CN2017/101614
Authority: WO
Inventors: 李问杰
Original assignee: 深圳信炜科技有限公司
Priority date: 2016-11-03
Filing date: 2017-09-13
Publication date: 2018-05-11
Also published as: CN107958145A; CN107958145B

Abstract

A display device and an electronic device, the display device being used for performing image display and for performing biometric feature information sensing, and comprising: a plurality of point light sources (102); a touch screen (104) for determining a contact area (112) of a target object (200) on the display device; a controller (106) for controlling timing sharing lighting of the plurality of point light sources (102) corresponding to the contact area (112) to emit light signals to the target object (200); a plurality of light sensing elements (108) for receiving the light signals reflected by the target object (200) and converting the received light signals into corresponding electrical signals; and a processing circuit (110) for determining biometric feature information of the target object (200) based on the electrical signal. The electronic device comprises the display device.

Description

Display device and electronic device

Technical field

The utility model relates to the field of biometric identification, in particular to a display device and an electronic device capable of performing biometric information sensing on a full screen.

Background technique

In the related art, the principle of the optical fingerprint recognition module mainly utilizes the reflection of light on the surface of the glass cover to identify the valley information of the fingerprint, because when the finger is pressed on the glass cover, the ridge of the fingerprint contacts the glass cover, and The valley of the fingerprint does not have a glass cover, so that the reflected light of the valley and the ridge of the fingerprint is greatly different, and the reflected light is collected to realize the fingerprint collection.

At present, the optical fingerprint recognition module is mainly divided into two types, one of which is a fingerprint recognition module commonly used for access control, and the other is a fingerprint recognition module that uses a surface light source.

For the fingerprint recognition module commonly used in access control, the light bulb is usually used to emit light, and the camera is used with the optical system to receive the light reflected by the finger, thereby realizing fingerprint collection. However, in order to capture a clear image, the camera and optical system are usually far from the glass cover. Correspondingly, when such a large-sized fingerprint recognition module is coupled to an electronic device (for example, a mobile phone), the thickness of the electronic device is thick, which is disadvantageous for the electronic device to develop toward lightness and thinness.

For the fingerprint recognition module using the surface light source, the accuracy of the fingerprint image formed by the light emitted by the surface light source and reflected by the finger will be affected by the thickness of the glass cover plate. When the thickness of the glass is increased, it is collected by the scattering of light. The accuracy of the fingerprint image will decrease. Correspondingly, when such a fingerprint recognition module is placed under the front protective cover of the mobile phone, the fingerprint sensing accuracy of the fingerprint recognition module is insufficient due to the thick front cover.

Utility model content

The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art. To this end, embodiments of the present invention need to provide a display device and an electronic device capable of performing biometric information sensing in full screen.

The present invention provides a display device for performing image display and for performing biometric information sensing. The display device includes:

Multiple point sources;

a touch screen for determining a contact area of the target object on the display device;

a controller, configured to control a plurality of the point light sources corresponding to the contact area to lightly illuminate to emit an optical signal to the target object;

a plurality of photosensitive elements for receiving an optical signal reflected by the target object and converting the received optical signal into a corresponding electrical signal; and

Processing circuitry for determining biometric information of the target object based on the electrical signal.

Optionally, the display device includes a display module, the display module is configured to emit light and perform image display, and the plurality of sensing elements are disposed in the display module, and the display module includes multiple a pixel, the plurality of pixel points being used as the plurality of point light sources, or an area where each of the pixel points is used to form the point light source, respectively.

Optionally, the plurality of pixel points are self-illuminating point light sources, or the display module further includes a backlight, the backlight source is a surface light source, and the controller controls the plurality of pixel points by Correspondingly controlling whether light from the backlight is emitted from the plurality of pixel points, and each of the pixels corresponds to a region of the backlight to form one of the point light sources.

Optionally, when the plurality of pixel points are self-illuminating point light sources, the display module is an organic light emitting diode display module; when the display module includes a backlight, the display module is a liquid crystal Display module.

Optionally, the touch screen includes a touch sensing layer and a touch detection circuit, where the touch detection circuit is configured to drive the touch sensing layer to perform touch sensing, wherein the touch sensing layer is disposed above the display module, or is set Inside the display module.

Optionally, the display module includes an opposite first substrate and a second substrate, the first substrate includes a first surface facing the second substrate, and the second substrate includes a first substrate a second surface, the plurality of pixel points being disposed between the first substrate and the second substrate, each of the pixel points including a control switch, a pixel electrode, and a common electrode.

Optionally, the plurality of photosensitive elements, the control switch of the plurality of pixel points, and the pixel electrode are both disposed on the first surface.

Optionally, the display module further includes a black matrix layer in a grid shape, the photosensitive element is disposed in a mesh area corresponding to the black matrix layer, and is configured to receive a space passing through the mesh area. The optical signal reflected by the target object.

Optionally, the black matrix layer is disposed on the second surface.

Optionally, the display module further includes a color filter layer formed on a mesh area of the black matrix layer, and the photosensitive element is configured to receive through the color filter layer An optical signal reflected by the target object.

Optionally, the plurality of pixel points are self-illuminating color point light sources.

Optionally, the control switch and the pixel electrode of the plurality of pixel points are disposed on the first surface, and the plurality of photosensitive elements are disposed on the second surface.

Optionally, the display module further includes a black matrix layer disposed on the second surface, the black matrix layer is provided with an opening, and the opening receives the photosensitive element and The photosensitive element can be caused to receive an optical signal reflected by the target object.

Optionally, the photosensitive element comprises one or more of a thin film transistor, a complementary metal oxide semiconductor transistor, and a charge coupled device.

Optionally, the plurality of photosensitive elements are arranged in an array.

Optionally, each photosensitive element is disposed corresponding to a point of light source, or a photosensitive element is disposed corresponding to an area where each point source is located.

Optionally, the display device further includes a plurality of first scan lines and a plurality of first data lines, wherein the plurality of first scan lines are insulated from the plurality of first data lines, and the plurality of light sensing The component is a phototransistor, wherein a gate of the phototransistor is connected to the first scan line, a source of the phototransistor is connected to the first data line, and a drain of the phototransistor is connected to the processing circuit.

Optionally, the display device further includes a first driving circuit, connected to the plurality of first scan lines and the plurality of first data lines, for providing a first scan signal to the phototransistor through the first scan line a gate to activate the phototransistor, the first driver circuit further providing a drive signal to the source of the activated phototransistor through the first data line.

Optionally, the first driving circuit is further connected to the controller, and when performing biometric information sensing, the first driving circuit is configured to drive the plurality of photosensitive elements to operate under the control of the controller.

Optionally, the control switch is a transistor switch, the display module further includes a plurality of second scan lines and a plurality of second data lines, the plurality of second scan lines and the plurality of second data lines An insulation cross arrangement, wherein the second scan line is connected to a gate of the transistor switch, the second data line is connected to a source of the transistor switch, and the transistor switch is connected to the pixel electrode.

Optionally, the plurality of first scan lines are disposed in parallel with the plurality of second scan lines, and the plurality of first data lines are disposed in parallel with the plurality of second data lines, and each second scan line The transistor switch and the photo transistor are respectively disposed at an insulation intersection with the second data line.

Optionally, the display device further includes a second driving circuit respectively connected to the second scan line and the second data line, and further connected to the controller, the controller controls the second driving a circuit for driving a point source to emit light, the second driving circuit for supplying a second scan signal to the transistor switch through the second scan line a gate to activate a transistor switch, the second driver circuit further providing a driving signal to the pixel electrode through the second data line and the source of the activated transistor switch to cause the pixel to be illuminated.

Optionally, the transistor switch and the phototransistor are both thin film transistors, and the processes of the two are the same.

Optionally, when controlling the point light source to be time-divisionally lit, the controller is configured to control a plurality of the point light sources corresponding to the contact area to sequentially illuminate, or a plurality of the point light sources of a predetermined distance Light at the same time.

Optionally, the biometric information includes fingerprint information, and a horizontal precision of the fingerprint image formed by the fingerprint information is half of a horizontal width of the pixel, and a vertical precision of the fingerprint image is the pixel Half the vertical width.

Optionally, when the display module displays an image, when performing the biometric information sensing, the controller is further configured to control another area of the display module outside the contact area to continue to display an image. .

Optionally, when the display module is in a blackout state, when performing the biometric information sensing, the controller is configured to control other areas of the display module outside the contact area to continue to be extinguished. Screen status.

Optionally, the biometric information includes any one or more of fingerprint information, palm print information, and ear print information.

Optionally, the plurality of photosensitive elements are dispersed throughout the image display area of the display device to perform biometric information sensing throughout the image display area.

The present invention also provides an electronic device characterized by comprising the display device according to any of the above.

In the above display device, since the display device uses a time-division illumination for a plurality of point light sources corresponding to the contact area of the target object, a single-point illumination can be selected when the target object is scanned, and a plurality of predetermined intervals can be selected. The point source emits light, and accordingly, the light reflected by the target object has a small influence on each other; in addition, the light can be collected by the photosensitive element by the principle of specular reflection, and the area of the photosensitive element passing through the area of the reflected light is independent of the thickness of the medium, thereby improving the collection. The image accuracy of the target object. Accordingly, the user experience of the electronic device having the display device is better.

In addition, the display device can perform biometric information sensing on a full screen to further enhance the user experience.

The additional aspects and advantages of the embodiments of the invention will be set forth in part in the description in the written description

DRAWINGS

The above and/or additional aspects and advantages of the embodiments of the invention will be apparent from the

1 is a block diagram of a biometric identification device according to an embodiment of the present invention;

2 is a schematic diagram of a biometric device performing biometric information sensing according to an embodiment of the present invention;

3 is a schematic diagram showing the principle of receiving a reflected light signal by a photosensitive element of the biometric device according to an embodiment of the present invention;

4 is a schematic structural diagram of a display module of a biometric device according to an embodiment of the present invention;

5 is a schematic structural view of a biometric identification device according to an embodiment of the present invention;

6 is a schematic plan view of a display module of a biometric device according to an embodiment of the present invention;

7 is a partial structural schematic view of a display module of a biometric device according to an embodiment of the present invention;

8 is another schematic plan view of a display module of the biometric device according to an embodiment of the present invention;

9 is a schematic structural view of another part of a display module of the biometric device according to an embodiment of the present invention;

10 is a schematic view showing the distribution of photosensitive elements of the biometric identification device according to an embodiment of the present invention;

11 is a schematic view showing a distribution of a point light source corresponding to a contact area of a biometric device according to an embodiment of the present invention;

12 is another schematic diagram of distribution of a point light source corresponding to a contact area of the biometric device according to an embodiment of the present invention;

FIG. 13 is a schematic plan view of an electronic device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. . Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be, for example, a fixed connection or a Disassembling the connection, or connecting integrally; may be mechanical connection, electrical connection or communication with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or mutual interaction of two elements Role relationship. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis. Righteousness.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may repeat reference numerals and/or reference numerals in different examples, which are for the purpose of simplicity and clarity, and do not in themselves indicate the relationship between the various embodiments and/or settings discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

Further, the described features, structures may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are set forth However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details or other structures, components, and the like. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

Referring to FIG. 1 and FIG. 2 , a biometric device 100 includes a plurality of point light sources 102 , a touch screen 104 , a controller 106 , a plurality of photosensitive elements 108 , a processing circuit 110 , and a first driving circuit 111 . And a second driving circuit 113.

The touch screen 104 is used to determine the contact area 112 of the target object 200 on the biometric device 100. The controller 106 is configured to control a plurality of point light sources 102 corresponding to the contact area 112 to illuminate in time to emit an optical signal to the target object. When the biometric information sensing is performed, the first driving circuit 111 is used to drive the plurality of photosensitive elements 108 to operate under the control of the controller 106. A plurality of photosensitive elements 108 are used to receive the optical signals reflected by the target object 200 and convert the received optical signals into corresponding electrical signals. The processing circuit 110 is configured to determine biometric information of the target object 200 based on the electrical signal. The controller 106 correspondingly controls a plurality of point light sources 102 corresponding to the contact area 112 to lightly emit light signals to the target object, for example, by controlling the second driving circuit 113.

In the above-described biometric device 100, since the biometric device 100 uses time-division lighting for a plurality of point light sources 102 corresponding to the contact area of the target object 200, a single-point illumination can be selected when the target object 200 is scanned, or alternatively, A plurality of point light sources 102 that are spaced far enough apart are illuminated, and accordingly, the light reflected by the target object 200 interacts with each other sufficiently small; in addition, light can be collected by the photosensitive element 108 by the principle of specular reflection, and the photosensitive element 108 passes through the reflected light collecting region. The area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200. At the same time, the time-division illumination point source 102 can form a complete image information of the target object 200.

The biometric device 100 may include or be integrated as a biometric chip for receiving contact or proximity of the target object 200 to sense image information of the target object 200. However, the application is not limited thereto, and as described below, a portion of the biometric device 100 for acquiring an image may also be formed in a display module of the display device, The display module is configured to receive a finger contact or proximity of the user to sense image information of the target object 200, so that the display device can perform biometric information sensing on a full screen, thereby improving the user experience, and is also beneficial to the user. The electronic device having the biometric device 100 is developed in a lighter and thinner direction.

The biometric information includes, for example, but not limited to any one or more of fingerprint information, palm print information, and ear print information. Accordingly, the biometric device is, for example, a fingerprint recognition device, or a fingerprint recognition device in combination with a blood oxygen recognition device or the like.

Specifically, in some examples, the plurality of point sources 102 are arranged in an array, and the plurality of photosensitive elements 108 are also arranged in an array. However, in other examples, the plurality of point light sources 102 may be arranged in other regular or irregular manners, and the plurality of photosensitive elements 108 may also be arranged in other regular or irregular manners. In addition, in the present embodiment, each photosensitive element 108 is disposed corresponding to one point light source 102 to achieve a better receiving effect.

In one example, please refer to FIG. 3. The arrowed line in FIG. 3 indicates light. The thickness of the first medium 300 on the left side of the figure is smaller than the thickness of the second medium 302 on the right side of the figure, and the photosensitive element 108 is opposite to the first medium. The collection area of the reflected light of the first target object 304 (eg, a finger) on the 300 is the same as the collection area of the reflected light of the second target object 306 (eg, a finger) on the second medium 302, thereby ensuring the image of the acquisition target object 200. Precision. The first medium 300 and the second medium 302 may be protective covers of the biometric device 100. It should be noted that FIG. 3 only schematically illustrates the optical path of the biometric information sensing, the positional relationship of the photosensitive element 108 and the point light source 102, and is not limited to the positional relationship shown in FIG. 3, and the photosensitive element 108 and the point light source 102. The positional relationship can be referred to the introduction of the embodiment of the present invention.

It should be noted that the photosensitive element 108 facing the valley of the fingerprint mainly receives the light reflected from the mirror surface of the protective cover, and the photosensitive element 108 facing the ridge of the fingerprint mainly receives the light reflected back from the ridge of the fingerprint, wherein the mirror surface The reflected light is much stronger than the diffuse reflected light, so that after the photosensitive element 108 determines the position of the valley of the fingerprint according to the line reflected from the mirror surface of the protective cover, for example, by exclusive, the position of the ridge of the fingerprint can be It is determined that, alternatively, the photosensitive element 108 can also determine the position of the ridges and valleys of the fingerprint based on the intensity of the received light.

When performing biometric information sensing, referring to FIG. 2, the target object 200 may be placed on the protective cover 101 of the electronic device to which the biometric device 100 is applied, and the parameter value of a certain area 114 of the touch screen 104 changes, the touch screen A certain area 114 of 104 corresponds to the contact area 112 of the target object 200 on the biometric device 100, and thus the touch screen 104 can determine the contact area 112 of the target object 200 on the biometric device 100.

Preferably, the touch screen 104 can determine the contact area 112 of the target object 200 on the biometric device 100 using, for example, but not limited to, a capacitive sensing principle. The target object 200 is, for example, a finger.

In some embodiments, referring to FIG. 4, the biometric device 100 includes a display module 116 for emitting light and performing image display. The display module 116 includes a plurality of pixel points 118 and a plurality of pixel points 118. As much The point sources 102, or the regions in which the individual pixels 118 are located, are used to form the point source 102, respectively.

In this manner, the point source 108 can be formed by using the pixel 118 of the display module 116 or the area where the pixel 118 is located, so that the display module 116 can be multiplexed into the light source when the biometric information is sensed, so that the biometric device 100 is executing. When the biometric information is sensed, no additional point light source is needed, which saves the cost of the biometric device 100.

In addition, the controller 106, the driving circuits 111, 113, and the processing circuit 110 may be integrated, for example, in one chip, the chip is connected to the display module 116, or the controller 106, the driving circuits 111, 113, and the processing circuit 110 may be used by themselves. It is disposed outside the display module 116 and is respectively connected to the display module 116.

In some embodiments, the plurality of pixels 118 are self-illuminating point sources 102, or the display module 116 further includes a backlight 120, the backlight 120 is a surface light source, and the controller 106 controls the plurality of pixels 118 by Correspondingly, whether the light from the backlight 120 is emitted from the plurality of pixel points 118, each pixel point 118 forms a point light source 102 corresponding to the area of the backlight 120.

As such, the display module 116 has a wide range of types to be selected, so that the biometric device 100 has a large application range.

Specifically, when the pixel point 118 is a self-illuminating point light source 102, the display module 116 can be an organic light emitting diode (OLED) display module, and the OLED display module can be an active matrix organic light emitting diode (AMOLED) or passive organic light emitting. Diode (PMOLED) display module. When the display module 116 includes the backlight 120, the display module 116 is a liquid crystal display module.

More specifically, when the display module 116 is an organic light emitting diode display module, after the touch screen 104 determines the contact area 112 of the target object on the biometric device 100, the controller 106 controls a plurality of pixels corresponding to the contact area 112. The point 118 is illuminated to emit an optical signal to the target object 200.

When the display module 116 is a liquid crystal display module, after the touch screen 104 determines the contact area 112 of the target object 200 on the biometric device 100, the controller 106 controls the plurality of pixel points 118 corresponding to the contact area 112 to be time-divided. The light of the backlight 120 is passed through such that the light of the backlight 120 is emitted from the plurality of pixel points 118 to the target object 200 to achieve time-division illumination of the point source 102. In such an embodiment, pixel point 118 corresponds to a switch of light, and controller 106 controls pixel point 118 to cause light from backlight 120 to exit from pixel point 118.

In some embodiments, touch screen 104 includes a touch sensing layer 105 and a touch detection circuit (not labeled) for driving touch sensing layer 105 to perform touch sensing to determine contact area 112, wherein The touch sensing layer 105 is disposed above the display module 116 or disposed inside the display module 116. The touch detection circuitry is controlled, for example, by the timing of the controller 106. The touch sensing layer 105 may be an additional electrode layer or a conductive element of the multiplexing display module 116 when the touch sensing layer 105 is disposed inside the display module 116.

As such, the manner in which the touch screen 104 is disposed is flexible, reducing the cost of the biometric device 100.

Specifically, in one example, the touch sensing layer 105 of the touch screen 104 is disposed above the display module 116, so that the touch screen 104 can be separately manufactured. After the manufacturing is completed, the touch sensing layer 105 of the touch screen 104 is directly attached to the display mode. Above the group 116, as shown in Figure 5, such a manufacturing process is simple.

In another example, the touch sensing layer 105 of the touch screen 104 is disposed inside the display module 116. At this time, the sensing electrodes of the touch screen 104 multiplexed by some electrodes in the display module 116 can be used to reduce the biological activity. The cost of the identification device 100, on the other hand, also reduces the thickness of the biometric device 100.

In the example shown in FIG. 2, the protective cover 101 is disposed above the display module 116. It can be understood that when the touch sensing layer 105 of the touch screen 104 is disposed above the display module 116 , the touch sensing layer 105 of the touch screen 104 is located between the display module 116 and the protective cover 101 .

In some embodiments, referring to FIG. 4, the display module 116 includes an opposite first substrate 122 and a second substrate 124. The first substrate 122 includes a first surface 126 facing the second substrate 124, and the second substrate 124 includes A plurality of pixel points 118 are disposed between the first substrate 122 and the second substrate 124 toward the second surface 128 of the first substrate 122. Each of the pixel points 118 includes a control switch 130, a pixel electrode 132, and a common electrode 134.

As such, the controller 106 can control the on and off of the switch 130, for example, such that the area where the pixel point 118 is located is transparent to achieve illumination of the point source 102.

Specifically, in an example, when the display module 116 is a liquid crystal display module, the backlight 120 of the liquid crystal display module may be disposed outside the second substrate 124, and the backlight 120 of the liquid crystal display module is a surface light source. The controller 106 controls whether the light source from the backlight 120 is emitted from the pixel point 118 by controlling the on and off of the control switch 130 to realize whether the point light source 102 formed by the area of the backlight 120 corresponding to the pixel point 118 is clicked. bright. The control switch 130 can be a thin film transistor (TFT).

Further, in one example, the common electrode 134 can be multiplexed as a sensing electrode of the touch screen 104, and the sensing electrode can form a touch sensing layer of the touch screen 104. Wherein, the common electrode 134 includes a plurality of sub-electrodes that are separated from each other.

It should be noted that FIG. 4 only illustrates one of the structures of the display module 116, and should not be construed as limiting the present invention.

In some embodiments, referring to FIG. 6, a plurality of photosensitive elements 108, a plurality of control points 130 of pixel points 118, and pixel electrodes 132 are disposed on the first surface 126.

In this way, the photosensitive element 108 can be formed while the control switch 130 and the pixel electrode 132 are fabricated on the first substrate 122 without increasing the process cost, thereby making the cost of providing the photosensitive element 108 low.

In one example, the control switch 130 is, for example, a thin film transistor (TFT), which can form a control switch 130 and a pixel electrode 132 on the first substrate 122 by using yellow light photolithography. The photosensitive elements 108, in turn, enable the placement of a plurality of photosensitive elements 108.

The control switch 130 is, for example, a transistor switch, the photosensitive element 108 is, for example, a phototransistor, and when the control switch 130 and the photosensitive element 108 are both TFTs, the two are made, for example but not limited to, by the same process. . In addition, when the photosensitive element 108 is a COMS transistor or a CCD, the manufacturing process of the photosensitive element 108 and the control switch 130 may be different, for example.

It should be noted that, in the embodiment of the present invention, when the display module 116 is a liquid crystal display module, the control switch 130, the pixel electrode 132, and the photosensitive element 108 are formed on the first substrate 122 and formed on the common electrode 134. After the second substrate 124 is formed, liquid crystal is injected between the two substrates of the display module 116, and then packaged by the package 400 to form a liquid crystal display module. A support 402 may be disposed between the two substrates to support the display module 116.

In some embodiments, referring to FIG. 4 and FIG. 7, the display module 116 further includes a black matrix layer 136 in a grid shape, and the photosensitive element 108 is disposed in the grid region 138 corresponding to the black matrix layer 136, and is used for An optical signal reflected by the target object 200 passing through the mesh region 138 is received.

As such, even if the display module 116 has the black matrix layer 136, the photosensitive element 108 can be caused to receive the optical signal reflected by the target object 200.

Specifically, the black matrix layer 136 can be applied to a liquid crystal display module and an organic light emitting diode display module. In one example, one of the grid regions 138 of the black matrix layer 136 may correspond to a region of one pixel 118 of the display module 116, and one photosensitive element 108 corresponds to a grid region 138.

In some embodiments, referring to FIGS. 7 and 9, a black matrix layer 136 is disposed on the second surface 128.

Thus, the black matrix layer 136 is formed on the second substrate 124, which simplifies the process of the display module 116. In one example, the black matrix layer 136 can be formed on the second surface 128 by printing.

In some embodiments, referring to FIG. 4, FIG. 7, and FIG. 9, the display module 116 further includes a color filter layer 140 formed on the grid region 138 of the black matrix layer 136, and the photosensitive element 108. An optical signal for receiving a target object 200 that passes through the color filter layer 140.

As such, the color filter layer 140 can be applied to the liquid crystal display module and the organic light emitting diode display module to implement the color display of the display module 116.

Specifically, the color filter layer 140 may include three color layers of red, green, and blue, and the three color layers may be arranged in a manner consistent with the arrangement of the pixel points 118 of the display module 116.

When the color filter layer 140 is applied to the OLED display module, the self-luminous pixel of the OLED display module emits white light, and the white light passes through the color filter layer 140 and can be displayed as a color light.

In some embodiments, the plurality of pixel points 118 are self-illuminating color point sources.

In this way, the self-luminous pixel point 118 of the display module 116 can be directly used as a point light source to reduce biological knowledge. The cost of the device 100.

Specifically, in an example, when the display module 116 is an OLED display module, the pixel 118 of the display module 116 is self-illuminating, and the plurality of pixels 118 of the display module 116 may include three primary colors. Pixels, such as red-emitting pixels, blue-emitting pixels, and green-emitting pixels, each self-illuminating pixel 118 can be implemented using an organic light emitting diode.

In some embodiments, referring to FIGS. 8 and 9, the control switch 130 and the pixel electrode 132 of the plurality of pixel points 118 are disposed on the first surface 126, and the plurality of photosensitive elements 108 are disposed on the second surface 128.

As such, the control switch 130 and the pixel electrode 132 are disposed separately from the photosensitive element 108, and the adverse effect of the photosensitive element 108 on the control switch 130 and the pixel electrode 132 can be reduced.

In some embodiments, the display module 116 further includes a black matrix layer 136 disposed on the second surface 128, the black matrix layer 136 is provided with an opening 142, and the opening 142 receives the photosensitive element 108 and can The photosensitive element 108 is caused to receive an optical signal reflected by the target object 200.

As such, the photosensitive element 108 is housed in the black matrix layer 136 with less influence on the aperture ratio of the display module 116.

In addition, when the processing circuit 110, the first driving circuit 111, and the photosensitive element 108 are electrically connected, a connection line of the processing circuit 110 and the first driving circuit 111 to the photosensitive element 108, respectively, may be formed on the lower surface 144 of the black matrix layer 136. Then, the photosensitive element 108 is extended along the wall of the opening of the opening 142 and connected to the photosensitive element 108 to realize signal transmission. Preferably, the connecting line can adopt a transparent connecting line.

In some embodiments, the photosensitive element 108 is a semiconductor photosensitive element or other suitable type of photosensitive element, wherein the semiconductor photosensitive element includes, for example, but is not limited to, a Thin Film Transistor (TFT), a complementary metal oxide. Any one or more of a semiconductor (CMOS) transistor and a charge-coupled device (CCD), or other suitable type of semiconductor photosensitive element, the present invention does not do this. limit. The photosensitive element 108 can also be, for example, a photodiode.

For example, taking the photosensitive element 108 as a TFT as an example, light is sensitive to light by using an active area material of the TFT, thereby realizing light collection.

As such, a plurality of photosensitive elements 108 can be directly fabricated using a semiconductor process, making the cost of the biometric device 100 low.

For example, referring to FIG. 10, in an embodiment of the present invention, the photosensitive elements 108 may be arranged in an array on the first surface 126. The first surface 126 of the biometric device 100 further includes, for example, a plurality of first scan lines G1 and a plurality of first data lines D1, the plurality of first scan lines G1 and the plurality of first data lines D1 insulation cross setting. The plurality of photosensitive elements 108 are, for example, phototransistors. Wherein, the gate of the phototransistor 101 Connected to the first scan line G1, the source of the photo transistor is connected to the first data line D1, and the drain of the photo transistor is connected to the processing circuit 110. The plurality of first scan lines G1 and the plurality of first data lines D1 are connected to the first driving circuit 111.

The first driving circuit 111 is configured to provide a first scan signal to the gate of the phototransistor through the first scan line G1 to activate the phototransistor, and the first driving circuit 111 further provides a driving signal to the first data line D1. The source of the activated phototransistor.

It should be noted that the circuit structure of the photosensitive element 108 and the first driving circuit 111 itself and the circuit relationship between the two are only an embodiment of the present application, and the application is not limited thereto. The circuit structure of the element 108 and the first driving circuit 111 itself and the circuit relationship therebetween may also be other suitable embodiments as long as the first driving circuit 111 can drive the photosensitive element 108 to perform sensing target object reflection. The light that comes back and converts the optical signal into an electrical signal.

Referring to FIG. 6 , the control switch 130 is, for example, a transistor switch. The display module 116 further includes a plurality of second scan lines G2 and a plurality of second data lines D2, and the plurality of second scan lines G2 and The plurality of second data lines D2 are insulated and disposed, wherein the second scan line G2 is connected to a gate of the transistor switch, and the second data line D2 is connected to a source of the transistor switch. The transistor switch is connected to the pixel electrode 132.

The second driving circuit 113 is connected to the second scan line G2 and the second data line D2, respectively, and is further connected to the controller 106. The controller 106 drives the point light source 102 to emit light by controlling the second driving circuit 113, and the second driving circuit 113 is configured to provide a second scan signal to the gate of the transistor switch through the second scan line G2 to activate The transistor switch further provides a driving signal to the pixel electrode 132 through the second data line D2 and the source of the activated transistor switch to cause the area of the pixel point 118 to emit light.

The second driving circuit 113 can further be used to drive the pixel point 118 to perform image display.

It should be noted that the structure of the display module 116 is only an embodiment of the present application. The application is not limited thereto. The structure of the display module 116 may also be other suitable embodiments, for example, The structure of the display module of the OLED is significantly different from the above structure, but is also applicable to the present application. For a person of ordinary skill in the art, a display module consistent with an embodiment of the present application is easily conceivable.

The plurality of first scan lines G1 and the plurality of second scan lines G2 are disposed, for example, but not limited to being parallel, and the plurality of first data lines D1 and the plurality of second data lines D2 are, for example but not limited to, parallel. It is provided that the transistor switch and the photo transistor are respectively disposed at the insulation intersection of each of the second scan line G2 and the second data line D2.

It should be noted that the connection line connecting the photosensitive elements 108 is connected to the control switch 130 connecting the pixel points 118. The wiring interval is disposed on the first surface 126.

In some embodiments, when the control point light source 102 is time-divisionally illuminated, the controller 106 is configured to control the plurality of point light sources 102 corresponding to the contact area 112 to sequentially light up, or several point light sources 102 of a predetermined distance simultaneously Light up.

In this way, the manner in which the time-division lighting is implemented is diversified, which facilitates the design flexibility of the controller 106.

Specifically, in one example, the plurality of point light sources 102 are arranged in an array, and the plurality of point light sources 102 corresponding to the contact areas 112 are also arranged in an array, and the controller 106 can control several points in the array. The light sources 102 are sequentially turned on in order from left to right and from left to right. However, in other examples, the controller 106 may also control the plurality of point light sources 102 to sequentially illuminate according to other regular or irregular orders.

Referring to FIG. 11, FIG. 11 illustrates an arrangement of a plurality of point light sources 102 corresponding to the contact regions 112. A plurality of point light sources 102 corresponding to the contact area 112 are arranged in a total of 20 point light sources 102 in 5 rows and 4 columns. For convenience of description, the 20 point light sources 102 are numbered P11, P12, P13, ..., P53, P54, respectively. .

When performing biometric information sensing, the controller 106 controls the point light source P11 to illuminate, controls the other point source 102 to be extinguished, and the photosensitive element 108 around the point source P11 receives the optical signal reflected by the target object 200.

Thereafter, the controller 106 controls the point light source P12 to light, controls the other point source 102 to be extinguished, and the photosensitive element 108 around the point source P12 receives the light signal reflected by the target object 200. By analogy, the controller 106 completes the time-division illumination of all 20 point sources 102 corresponding to the contact area 112, and the processing circuit 110 receives the electrical signals output by the photosensitive element 108 to determine the biometric information of the target object 200.

In another example, the predetermined distance may be the distance between a line of point sources, a few lines of point sources, a list of point sources, or a few lines of point sources in the array.

Specifically, referring to FIG. 12, in such an example, a plurality of point light sources 102 corresponding to the contact area 112 are arranged in 6 rows and 4 columns for a total of 24 point light sources 102. For convenience of explanation, 24 point light sources 102 are provided. They are numbered T11, T12, T13, ..., T63, T64. In the example, the predetermined distance is a two-line point source.

When the biometric information sensing is performed, the controller 106 controls the point light sources T11 and T41 to simultaneously illuminate, controls the other point light sources 102 to be extinguished, and the photosensitive elements 108 around the point light sources T11 and T41 receive the optical signals reflected by the target object 200.

Thereafter, the controller 106 controls the point light sources T12 and T42 to simultaneously illuminate, controls the other point light sources 102 to be extinguished, and the light receiving elements 108 around the point light sources T12 and T42 receive the light signals reflected by the target object 200. By analogy, the controller 106 completes the time-division illumination of all of the 24 point sources 102 corresponding to the contact area 112, and the processing circuit 110 receives the electrical signals output by the photosensitive element 108 to determine the biometric information of the target object 200.

It should be noted that the above examples are examples for facilitating the understanding of the embodiments of the present invention and are not to be construed as limiting the scope of the present invention.

In some embodiments, the horizontal accuracy of the image of the target object 200 formed by the biometric information is half the horizontal width of the pixel, and the vertical precision of the image of the target object 200 is half the vertical width of the pixel.

In this way, mainstream electronic devices, such as mobile phones, tablets, and notebook computers, can achieve image acquisition accuracy of the target object 200, and the biometric device 100 can be applied in a wider range.

Specifically, when the screen of the electronic device is 5 inches (for example, a mobile phone screen) and the resolution is 1920×1080, the width of the pixel 118 is about 60 μm, and the image capturing accuracy of the target object 200 is 10 μm horizontally and 30 μm vertical.

When the screen of the electronic device is 13.3 inches (for example, a notebook screen) and the resolution is 1366×768, the width of the pixel 118 is about 220 um, and the image capturing accuracy of the target object 200 is 36 μm horizontally and 110 μm vertical.

When the screen of the electronic device is 22 inches (for example, the display screen of a personal computer), the resolution is 1920×1080, the width of the pixel 118 is about 270 um, and the image capturing precision of the target object 200 is 45 um horizontally and 135 um vertical.

Taking the biometric information as the fingerprint information as an example, it can be seen from the above that the screen of the mainstream electronic device can realize the fingerprint image collection of the fingerprint.

In some embodiments, when the display module 116 displays an image, when performing biometric information sensing, the controller 106 is further configured to control the other regions 146 of the display module 116 outside the contact area 112 to continue displaying images.

In this way, while the biometric information sensing is performed, the image display of the other regions 146 of the display module 116 is not affected, and the user experience is ensured.

Specifically, in conjunction with FIG. 2, when the biometric information sensing is performed, the finger 200 is pressed on the biometric device 100, and the controller 106 recognizes the contact area 112 of the finger on the biometric device 100, thereby determining the display module. In addition to the other regions 146 outside of the contact area 112, the controller 106 then controls the point source 102 corresponding to the contact area 112 to illuminate in time to complete the acquisition of biometric information. At the same time, controller 106 controls other areas 146 of display module 116 to continue to display images.

In some embodiments, when the display module 116 is in the off-screen state, when the biometric information sensing is performed, the controller 106 is configured to control the other regions 146 of the display module 116 outside the contact area 112 to continue to be off. status.

In this way, while the biometric information sensing is performed, the other regions 146 of the display module 116 are not affected to be in the off-screen state, thereby ensuring the user experience.

Specifically, when the biometric information sensing is performed, the finger 200 is pressed on the biometric device 100, and the controller 106 identifies the contact area 112 of the biometric device 100, thereby determining that the display module 116 is other than the contact area 112. Region 146, then controller 106 controls point light source 102 corresponding to contact region 112 to illuminate in time to complete acquisition of biometric information. At the same time, controller 106 controls other regions 146 of display module 116 to remain in the off-screen state.

Referring to FIG. 13, a display device 400 according to an embodiment of the present invention includes the biometric device 100 of any of the above embodiments.

In the above display device 400, since the biometric device 100 uses time-division lighting for a plurality of point light sources 102 corresponding to the contact area of the target object 200, a single-point illumination can be selected when the target object 200 is scanned, and the reservation can be selected. A plurality of point light sources 102 spaced far enough apart emit light, and accordingly, the light reflected by the target object 200 interacts with each other sufficiently small; in addition, light can be collected by the photosensitive element 108 by the principle of specular reflection, and the photosensitive element 108 passes through the reflected light collecting region. The area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200. At the same time, the time-division illumination point source 102 can form a complete image information of the target object 200.

The display module 116 is, for example, an image display component of the display device 400. Since the photosensitive element 108 is disposed in the display module 116, the display device 400 can perform biometric information sensing on a full screen. Improve the user experience. In addition, it is also advantageous for the electronic device 500 having the display device 400 to be developed in a direction that is lighter and thinner. Further, since the biometrics device 100 multiplexes components such as the point light source 102 of the display device, the manufacturing cost can also be saved.

Specifically, the display device 400 may be, but not limited to, a liquid crystal display device or an organic light emitting diode display device. Generally, the display device 400 includes a protective cover 101 (medium, as shown in FIG. 3) disposed at the outermost layer of the display device 400. The user's finger can perform a slide, click, etc. operation on the protective cover 101 to control the display of the display device 400. When performing biometric information sensing, a finger can be placed on the protective cover 101, and the touch screen 104 determines the contact area 112 of the finger on the display device, and the biometric device 100 can implement the collection of biometric information.

Referring to FIG. 13 again, an electronic device 500 according to an embodiment of the present invention includes the biometric device 100 of any of the above embodiments.

In the electronic device 500, since the biometric device 100 uses the time-lighting of the plurality of point light sources 102 corresponding to the contact area of the target object 200, the single-point illumination can be selected when the target object 200 is scanned, and the predetermined point can be selected. A plurality of point light sources 102 spaced far enough apart emit light, and accordingly, the light reflected by the target object 200 interacts with each other sufficiently small; in addition, light can be collected by the photosensitive element 108 by the principle of specular reflection, and the photosensitive element 108 passes through the reflected light collecting region. The area is independent of the thickness of the medium, thereby improving the image accuracy of the acquisition target object 200. At the same time, the time-division illumination point source 102 can form a complete image information of the target object 200.

Since the electronic device 500 includes the biometric device 100, correspondingly, the electronic device 500 can have the following three main advantages.

First, the thickness of the biometric device phase 100 is thinner than that of the fingerprint recognition module using the camera. Therefore, the thickness of the electronic device 500 having the biometric device 100 is thin, and does not affect the development of the electronic device 500 in the direction of thinning;

Second, the sensing accuracy of the biometric device 100 is less affected by the thickness of the glass cover plate, and therefore, after the biometric device 100 is placed under the protective cover of the electronic device 500, the sensing of the biometric device 100 The accuracy is less affected, thereby improving the user experience of the electronic device 500;

Third, when the electronic device 500 includes the display device 400, the portion of the biometric device 100 used for image acquisition may be disposed in the display module 116 of the display device 400, so that the electronic device 500 can perform full-screen execution of biometric information collection. Further, the user's experience is improved. In addition, the biometric device 500 can realize the point light source and the like by using some existing components in the display module 116, thereby saving materials, reducing the overall cost of the electronic device 500, and making the electronic device 500 relatively thin and light. .

Specifically, the electronic device 500 is, for example, a consumer electronic product or a home-based electronic product or a vehicle-mounted electronic product. Among them, consumer electronic products such as mobile phones, tablets, notebook computers, desktop monitors, computer integrated machines and other electronic products using biometric identification technology. Home-based electronic products such as intelligent door locks, televisions, refrigerators and other electronic products that use biometric technology. Vehicle-mounted electronic products such as car navigation systems, car DVDs, etc.

In the example of FIG. 13 , the electronic device 500 is a mobile phone, and the front surface of the mobile phone is provided with a touch screen 104 and a display device 400. In one example, when the biometric information to be collected is fingerprint information, when performing fingerprint information collection, the target is The object 200 is a finger placed on the touch screen 104 and the display device 400 such that the touch screen 104 can determine the contact area of the finger on the biometric device 100, and the biometric device 100 performs subsequent fingerprint information collection.

Alternatively, in another embodiment, the biometric device 100 may not be disposed on the display device 400. The image collection portion of the biometric device 100 may be integrated into a biometric chip, correspondingly disposed in the electronic device. The front side, the back side, and the side of the device 500 are at appropriate positions, and may be exposed to the outer surface of the electronic device 500 or may be disposed inside the electronic device 500 adjacent to the outer casing.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. The specific features, structures, materials or characteristics described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

While the embodiments of the present invention have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the invention Variations, modifications, substitutions and variations of the embodiments described above are possible.

Claims

A display device for performing image display and for performing biometric information sensing, the display device comprising:

Multiple point sources;

a touch screen for determining a contact area of the target object on the display device;

a controller, configured to control a plurality of the point light sources corresponding to the contact area to lightly illuminate to emit an optical signal to the target object;

a plurality of photosensitive elements for receiving an optical signal reflected by the target object and converting the received optical signal into a corresponding electrical signal; and

Processing circuitry for determining biometric information of the target object based on the electrical signal.
The display device as claimed in claim 1 , wherein the display device comprises a display module, the display module is configured to emit light and perform image display, and the plurality of sensing elements are disposed on the display module The display module includes a plurality of pixel points, and the plurality of pixel points are used as the plurality of point light sources, or an area where each of the pixel points is used to form the point light source.
The display device according to claim 2, wherein the plurality of pixel points are self-illuminating point light sources, or the display module further comprises a backlight, the backlight source is a surface light source, and the control The device controls the plurality of pixel points to correspondingly control whether light from the backlight is emitted from the plurality of pixel points, and each of the pixels corresponds to a region of the backlight to form one of the point light sources.
The display device as claimed in claim 3, wherein when the plurality of pixel points are self-illuminating point light sources, the display module is an organic light emitting diode display module; and when the display module comprises a backlight When the source is used, the display module is a liquid crystal display module.
The display device according to claim 2, wherein the touch screen comprises a touch sensing layer and a touch detection circuit, wherein the touch detection circuit is configured to drive the touch sensing layer to perform touch sensing, wherein the touch sensing layer is configured Above the display module, or inside the display module.
The display device as claimed in claim 2, wherein the display module comprises an opposite first substrate and a second substrate, the first substrate comprises a first surface facing the second substrate, the first The second substrate includes a second surface facing the first substrate, the plurality of pixel points being disposed between the first substrate and the second substrate, each of the pixel points including a control switch, a pixel electrode, and a common electrode.
The display device according to claim 6, wherein said plurality of photosensitive elements, said control switches of said plurality of pixel points, and said pixel electrodes are disposed on said first surface.
The display device of claim 7, wherein the display module further comprises a grid a black matrix layer, the photosensitive element is disposed in a mesh area corresponding to the black matrix layer, and is configured to receive an optical signal reflected by the target object of the mesh area.
A display device according to claim 8, wherein said black matrix layer is disposed on said second surface.
The display device according to claim 8 or 9, wherein the display module further comprises a color filter layer, the color filter layer is formed in a grid region of the black matrix layer, and the photosensitive element An optical signal for receiving the target object that passes through the color filter layer.
The display device according to claim 8 or 9, wherein the plurality of pixel points are self-illuminating color point light sources.
The display device according to claim 6, wherein said control switch of said plurality of pixel points and said pixel electrode are disposed on said first surface, and said plurality of photosensitive elements are disposed in said On the second surface.
The display device as claimed in claim 12, wherein the display module further comprises a black matrix layer, the black matrix layer is disposed on the second surface, and the black matrix layer is provided with an opening. The opening receives the photosensitive element and enables the photosensitive element to receive an optical signal reflected by the target object.
A display device according to claim 1, wherein said photosensitive member comprises one or more of a thin film transistor, a complementary metal oxide semiconductor transistor, and a charge coupled device.
A display device according to claim 1, wherein said plurality of photosensitive elements are arranged in an array.
The display device according to claim 1 or 2, wherein each of the photosensitive elements is disposed corresponding to a point of light source, or a photosensitive element is disposed corresponding to an area where each point source is located.
The display device according to claim 6, wherein the display device further comprises a plurality of first scan lines and a plurality of first data lines, the plurality of first scan lines and the plurality of first data lines The plurality of photosensitive elements are phototransistors, wherein the gate of the phototransistor is connected to the first scan line, the source of the phototransistor is connected to the first data line, and the drain of the phototransistor is processed Circuit connection.
The display device according to claim 17, wherein the display device further comprises a first driving circuit connected to the plurality of first scan lines and the plurality of first data lines for passing the first The scan line provides a first scan signal to the gate of the phototransistor to activate the phototransistor, the first drive circuit further providing a drive signal to the source of the activated phototransistor through the first data line.
The display device according to claim 18, wherein the first driving circuit is further connected to the controller, and when the biometric information sensing is performed, the first driving circuit is used under the control of the controller The plurality of photosensitive elements are driven to operate.
A display device according to claim 18, wherein said control switch is a transistor switch, The display module further includes a plurality of second scan lines and a plurality of second data lines, wherein the plurality of second scan lines are insulated from the plurality of second data lines, wherein the second scan lines Connected to a gate of the transistor switch, the second data line is coupled to a source of the transistor switch, and the transistor switch is coupled to the pixel electrode.
The display device according to claim 20, wherein the plurality of first scan lines are disposed in parallel with the plurality of second scan lines, the plurality of first data lines and the plurality of second data lines The lines are arranged in parallel, and the transistor switch and the photo transistor are respectively disposed at the insulation intersection of each of the second scan line and the second data line.
The display device according to claim 20, wherein said display device further comprises a second driving circuit connected to said second scan line and said second data line, and further connected to said controller The controller drives the point source to emit light by controlling the second driving circuit, and the second driving circuit is configured to provide a second scan signal to the gate of the transistor switch through the second scan line to activate the transistor switch, The second driving circuit further supplies a driving signal to the pixel electrode through the second data line and the source of the activated transistor switch to cause the pixel to be illuminated.
The display device according to claim 20 or 21, wherein the transistor switch and the phototransistor are both thin film transistors, and the processes of the two are the same.
The display device according to claim 1, wherein the controller is configured to control a plurality of the point light sources corresponding to the contact area to sequentially light up when the point light source is controlled to be time-divisionally illuminated. Several of the point sources of the predetermined distance or at the same time are illuminated.
The display device according to claim 2, wherein the biometric information comprises fingerprint information, and a horizontal precision of the fingerprint image formed by the fingerprint information is half of a horizontal width of the pixel, the fingerprint The vertical precision of the image is half of the vertical width of the pixel.
The display device according to claim 2, wherein when the display module displays an image, when the biometric information sensing is performed, the controller is further configured to control a location outside the contact area Other areas of the display module continue to display images.
The display device according to claim 2, wherein when the display module is in a blackout state, when the biometric information sensing is performed, the controller is configured to control a location outside the contact area The other areas of the display module continue to be off.
The display device according to claim 1, wherein the biometric information comprises any one or more of fingerprint information, palm print information, and ear print information.
The display device according to claim 1, wherein said plurality of photosensitive elements are dispersed over the entire image display area of the display device to perform biometric information sensing throughout the image display area.
An electronic device comprising the display device according to any one of claims 1-29.