CN114019707B - Display substrate, display panel and display device - Google Patents
Display substrate, display panel and display device Download PDFInfo
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- CN114019707B CN114019707B CN202111266333.5A CN202111266333A CN114019707B CN 114019707 B CN114019707 B CN 114019707B CN 202111266333 A CN202111266333 A CN 202111266333A CN 114019707 B CN114019707 B CN 114019707B
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
Abstract
The application discloses a display substrate, a display panel and a display device, which are used for realizing display and line identification integration. The display substrate provided by the embodiment of the application comprises: a plurality of sub-pixel areas arranged in an array, and a non-display area between the sub-pixel areas; the display substrate includes: the device comprises a substrate, a driving circuit layer arranged on the substrate, a plurality of photoelectric conversion units arranged on one side of the driving circuit layer away from the substrate, and a plurality of diaphragms arranged on one side of the photoelectric conversion units away from the driving circuit layer; the photoelectric conversion units and the diaphragms are positioned in the non-display area, and the orthographic projection of each photoelectric conversion unit on the substrate at least covers the orthographic projection of one diaphragm on the substrate; the drive circuit layer includes: the display driving circuit is positioned in the sub-pixel area, and the line identification driving circuit is electrically connected with the photoelectric conversion units in a one-to-one correspondence manner in the non-display area.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display substrate, a display panel, and a display device.
Background
With the rapid development of communication, network and financial technologies, information security shows unprecedented importance, and the application of personal identification technology is becoming wider and wider. Biometric techniques refer to the scientific technology of automatically identifying the identity of an individual using physiological features (e.g., face, fingerprint, palmprint) or behavioral features. Fingerprint is one of the most widely used physiological characteristics, and has unique and permanent properties, so that the fingerprint is valued by people, and has very wide application prospect in many aspects of the security field.
The fingerprint sensor can be classified into photoelectric type, capacitive type, pressure-sensitive type, thermosensitive type and ultrasonic type according to the working principle, wherein the photoelectric type fingerprint sensor can be widely applied due to low cost and large-area preparation. The optical fingerprint sensor is a key device for realizing photoelectric fingerprint acquisition. Currently, for a fingerprint acquisition device for realizing multi-finger or palm print acquisition, an additional connection with a computer and a display terminal is required for fingerprint matching and identity information display. The miniaturization of the fingerprint recognition system is not facilitated.
Disclosure of Invention
The embodiment of the application provides a display substrate, a display panel and a display device, which are used for realizing display and line identification integration.
The display substrate provided by the embodiment of the application comprises: a plurality of sub-pixel areas arranged in an array, and a non-display area between the sub-pixel areas;
the display substrate includes: the device comprises a substrate, a driving circuit layer arranged on the substrate, a plurality of photoelectric conversion units arranged on one side of the driving circuit layer away from the substrate, and a plurality of diaphragms arranged on one side of the photoelectric conversion units away from the driving circuit layer;
the photoelectric conversion units and the diaphragms are positioned in the non-display area, and the orthographic projection of each photoelectric conversion unit on the substrate at least covers the orthographic projection of one diaphragm on the substrate;
the drive circuit layer includes: the display driving circuit is positioned in the sub-pixel area, and the line identification driving circuit is electrically connected with the photoelectric conversion units in a one-to-one correspondence manner in the non-display area.
In some embodiments, the photoelectric conversion unit includes: a first electrode, a photoelectric conversion layer, and a second electrode which are stacked;
the first electrode is electrically connected with the line identification driving circuit;
the second electrode comprises at least one light hole; the orthographic projection of the light hole on the substrate falls into the orthographic projection of the photoelectric conversion layer on the substrate; the light transmission hole is used as a diaphragm.
In some embodiments, the display substrate further includes, in the non-display region: a plurality of light gathering structures positioned at one side of the diaphragm away from the photoelectric conversion unit; the light condensing structures are arranged in one-to-one correspondence with the diaphragms, and are used for converging light rays to the diaphragms.
In some embodiments, the light gathering structure comprises: and a microlens.
In some embodiments, the microlens comprises: a first resin layer on a side of the diaphragm facing away from the substrate; the light focusing structure further comprises a second resin layer positioned on one side of the first resin layer, which is away from the diaphragm;
the surface of the first resin layer, which is away from one side of the substrate, is provided with a bulge corresponding to the diaphragm;
the surface of the second resin layer, which faces away from one side of the substrate base plate, is a plane;
the refractive index of the first resin layer is greater than the refractive index of the second resin layer.
In some embodiments, the light focusing structure further includes a third resin layer between the aperture and the first resin layer, a first light shielding layer between the aperture and the third resin layer, and a second light shielding layer between the first resin layer and the third resin layer;
the refractive index of the third resin layer is equal to the refractive index of the first resin layer;
the first shading layer is provided with a first opening area, and the second shading layer is provided with a second opening area; the area of the first opening area is smaller than that of the second opening area; the orthographic projection of the first opening area on the substrate falls into the orthographic projection of the second opening area on the substrate, and the center of the first opening area, the center of the second opening area and the center of the diaphragm are overlapped on the orthographic projection of the substrate.
In some embodiments, the display substrate further comprises: an infrared filter layer between the diaphragm and the light gathering structure.
In some embodiments, the display substrate further comprises: the display device comprises an insulating layer positioned between a diaphragm and an infrared filter layer, a plurality of pixel electrodes positioned between the insulating layer and the infrared filter layer in a sub-pixel area and electrically connected with a display driving circuit, and a plurality of common electrodes positioned at one side of a condensing structure, which is far away from a substrate, in the sub-pixel area.
In some embodiments, the driving circuit layer further includes: a plurality of scan lines and a plurality of data lines;
the plurality of scan lines includes: a plurality of first scan lines and a plurality of second scan lines extending along a first direction;
the plurality of data lines includes: a plurality of first data lines and a plurality of second data lines extending in a second direction; the second direction intersects the first direction;
the first data line and the first scanning line are electrically connected with the display driving circuit, and the second data line and the second scanning line are electrically connected with the line identification driving circuit.
In some embodiments, the photoelectric conversion units are located between sub-pixel regions adjacent in the first direction;
the first data lines and the second data lines are arranged along a first direction and are arranged in the same layer;
the first scanning lines and the second scanning lines are arranged along the second direction, and the first scanning lines and the second scanning lines are arranged on the same layer.
In some embodiments, the plurality of sub-pixel regions are divided into a plurality of pixels; each pixel includes a plurality of sub-pixel regions arranged along a first direction;
the photoelectric conversion units are in one-to-one correspondence with the pixels, and one pixel is spaced between two adjacent photoelectric conversion units in the first direction.
In some embodiments, the plurality of sub-pixel regions are divided into a plurality of pixels; each pixel comprises two pixel units arranged along a first direction; each pixel unit comprises a plurality of sub-pixel areas arranged along a first direction;
two photoelectric conversion units arranged along the second direction are arranged between two adjacent pixel units;
in each pixel, two first data lines corresponding to the sub-pixel areas with the same light emitting color are electrically connected.
In some embodiments, the photoelectric conversion unit is between sub-pixel regions located adjacent in the second direction;
the orthographic projection of the second data line on the substrate is overlapped with the orthographic projection of the first data line on the substrate, and the second data line and the first data line are positioned on different film layers;
the first scanning lines and the second scanning lines are alternately arranged along the second direction, and the first scanning lines and the second scanning lines are arranged in the same layer.
In some embodiments, the plurality of sub-pixel regions are divided into a plurality of pixels; the pixel comprises two sub-pixel rows extending along a first direction and arranged along a second direction; the sub-pixel row includes a plurality of sub-pixel regions arranged along a first direction;
two photoelectric conversion units arranged along a first direction are arranged between two adjacent sub-pixel rows;
the first scanning lines corresponding to the adjacent two sub-pixel rows are electrically connected.
The display panel provided by the embodiment of the application comprises the display substrate provided by the embodiment of the application.
In some embodiments, the display panel further includes: an opposite substrate disposed opposite to the display substrate, and a liquid crystal layer disposed between the display substrate and the opposite substrate.
The display device provided by the embodiment of the application comprises the display panel provided by the embodiment of the application.
According to the display substrate, the display panel and the display device provided by the embodiment of the application, the display driving circuit is arranged in the sub-pixel area, and the line identification driving circuit and the photoelectric conversion unit are arranged in the non-display area, so that each film layer for realizing the display function and each film layer for realizing the line identification function are manufactured on the same substrate base substrate, the integration of display and line identification is realized, the data transmission between line identification equipment and display equipment can be avoided, and the identity confirmation time can be shortened. And set up the diaphragm in photoelectric conversion unit one side that deviates from substrate base plate, light is incident to photoelectric conversion unit through the light transmission district of diaphragm only, can avoid the light in sub-pixel district to reach photoelectric conversion unit through the reflection of rete interface to guarantee the line recognition accuracy when showing and line recognition integration in same substrate base plate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another display substrate according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of another display substrate according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another display substrate according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of another display substrate according to an embodiment of the present application;
fig. 6 is a schematic diagram of a display device according to an embodiment of the present application;
fig. 7 is a schematic diagram of another display device according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, embodiments of the application. And embodiments of the application and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present application fall within the protection scope of the present application.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the dimensions and shapes of the figures in the drawings do not reflect true proportions, and are intended to illustrate the present application only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
An embodiment of the present application provides a display substrate, as shown in fig. 1, including: a display area 34 and a peripheral area 35 outside the display area 34; the display area 34 includes a plurality of sub-pixel areas 1 arranged in an array and a non-display area 2 between the sub-pixel areas 1;
as shown in fig. 2, the display substrate includes: a substrate base plate 3, a driving circuit layer 4 positioned above the substrate base plate 3, a plurality of photoelectric conversion units 5 positioned at one side of the driving circuit layer 4 away from the substrate base plate 3, and a plurality of diaphragms 6 positioned at one side of the photoelectric conversion units 5 away from the driving circuit layer;
the photoelectric conversion units 5 and the diaphragms 6 are positioned in the non-display area 2, and the orthographic projection of each photoelectric conversion unit 5 on the substrate 3 at least covers the orthographic projection of one diaphragm 6 on the substrate 3;
the driving circuit layer 4 includes: a display driving circuit 7 located in the sub-pixel area 1, and a line recognition driving circuit 8 electrically connected to the photoelectric conversion units 5 in one-to-one correspondence in the non-display area 3.
According to the display substrate provided by the embodiment of the application, the display driving circuit is arranged in the sub-pixel area, and the line identification driving circuit and the photoelectric conversion unit are arranged in the non-display area, so that all film layers for realizing the display function and all film layers for realizing the line identification function are manufactured on the same substrate, the integration of display and line identification is realized, the data transmission between line identification equipment and display equipment can be avoided, and the identity confirmation time can be shortened. And set up the diaphragm in photoelectric conversion unit deviates from substrate base plate one side, light is incident to photoelectric conversion unit through the light transmission district of diaphragm only, can avoid the light in sub-pixel district to reachs photoelectric conversion unit through the reflection of rete interface to guarantee the line recognition degree of accuracy when showing and line recognition integration in same substrate base plate.
In the specific implementation, the texture may be, for example, a fingerprint, a palm print, or the like.
In some embodiments, as shown in fig. 2, the photoelectric conversion unit 5 includes: a first electrode 10, a photoelectric conversion layer 11, and a second electrode 12 which are stacked;
the first electrode 10 is electrically connected with the line identification driving circuit 8;
the second electrode 12 comprises at least one light transmission hole 13; the orthographic projection of the light hole 13 on the substrate 3 falls into the orthographic projection of the photoelectric conversion layer 11 on the substrate 3; the light transmission hole 13 serves as a diaphragm 6.
According to the display substrate provided by the embodiment of the application, the light holes are arranged on the top electrode of the photoelectric conversion unit to be multiplexed into the diaphragms, so that the thickness of the display substrate can be prevented from being increased, the manufacturing flow of the display substrate can be simplified, and the cost is saved.
In a specific implementation, the second electrode may be, for example, a light shielding electrode. The light shielding electrode may be, for example, a metal electrode.
In some embodiments, the display driver circuit and the texture recognition driver circuit each include a thin film transistor. The display driving circuit includes a first thin film transistor, the line recognition driving circuit includes a second thin film transistor, as shown in fig. 1, the driving circuit layer 4 specifically includes: a gate conductive layer, a gate insulating layer 9, an active layer 14, and a source drain conductive layer are sequentially provided on the substrate 3. The gate conductive layer includes a gate electrode G1 of the first thin film transistor and a gate electrode G2 of the second thin film transistor, and the source and drain conductive layer includes source and drain electrodes S1 and D1 of the first thin film transistor and source and drain electrodes S2 and D2 of the second thin film transistor.
In some embodiments, as shown in fig. 2, the drain D2 of the second thin film transistor is multiplexed as the first electrode 10. Therefore, the manufacturing process of the display substrate can be simplified, and the cost is saved.
In some embodiments, as shown in fig. 2, the display substrate further includes, in the non-display area 2: a plurality of light focusing structures 20 located on a side of the diaphragm 6 facing away from the photoelectric conversion layer 11; the light-gathering structures 20 are arranged in one-to-one correspondence with the diaphragms 6, and the light-gathering structures 20 are used for gathering light rays to the diaphragms 6.
According to the display substrate provided by the embodiment of the application, as light is only incident to the photoelectric conversion layer through the light hole area, the light condensing structure is arranged on one side of the diaphragm, which is away from the substrate, so that the light is converged to the diaphragm, the defect of insufficient photosensitive area of the photoelectric conversion unit can be avoided, and the sensitivity and accuracy of pattern recognition can be ensured.
In some embodiments, the light gathering structure comprises: and a microlens.
In some embodiments, as shown in fig. 2, the microlens includes: a first resin layer 24 on a side of the diaphragm 6 facing away from the substrate 3; the light condensing structure further includes: a second resin layer 25 on a side of the first resin layer 24 facing away from the diaphragm 6;
the surface of the first resin layer 24 on the side facing away from the substrate base plate 3 has projections 28 corresponding to the diaphragms 6;
the surface of the second resin layer 25 on the side facing away from the substrate base plate 3 is a plane;
the refractive index of the first resin layer 24 is greater than that of the second resin layer 25.
In the display substrate provided by the embodiment of the application, the convex parts of the second resin layer and the first resin layer are used for shaping and collimating light rays so as to be converged to the light hole area serving as the diaphragm. The second resin layer may also serve as a planarization for the first resin layer having the protrusions.
In some embodiments, as shown in fig. 2, the light focusing structure 20 further includes a third resin layer 22 between the diaphragm 6 and the first resin layer 24, a first light shielding layer 21 between the diaphragm 6 and the third resin layer 22, and a second light shielding layer 23 between the first resin layer 24 and the third resin layer 22;
the refractive index of the third resin layer 22 is equal to the refractive index of the first resin layer 24;
the first light shielding layer 21 has a first opening region 26, and the second light shielding layer 23 has a second opening region 27; the area of the first open area 26 is smaller than the area of the second open area 27; the front projection of the first opening area 26 on the substrate 3 falls within the front projection of the second opening area 27 on the substrate 3, and the front projection of the light transmitting hole 13 on the substrate 3 falls within the front projection of the first opening area 26 on the substrate 3.
According to the display substrate provided by the embodiment of the application, the light propagation path is increased by arranging the third resin layer so as to realize that the micro lens converges light to the light holes serving as the diaphragms, so that the manufacturing difficulty of the light gathering structure can be simplified. And the light condensing structure further comprises a first shading layer and a second shading layer, wherein the first shading layer is provided with an opening area, the first shading layer is positioned between the second shading layer and the diaphragm, and the area of the opening area in the first shading layer is smaller than that of the opening area in the second shading layer, so that light rays converged by the micro lenses can be further converged to a light transmitting hole serving as the diaphragm through the opening area of the shading layer, the photosensitive area of the photoelectric conversion unit is improved, and the sensitivity and accuracy of line identification can be ensured.
In some embodiments, the center of the first opening area, the center of the second opening area, and the center of the diaphragm coincide in an orthographic projection of the substrate.
In some embodiments, as shown in fig. 2, the display substrate further includes: an infrared filter layer 19 located between the diaphragm 6 and the light collecting structure 20. Therefore, the infrared filter layer can filter ambient light, and the ambient light is prevented from being incident into the photoelectric conversion layer to influence the pattern recognition accuracy.
In some embodiments, as shown in fig. 2, the display substrate further includes: an insulating layer 31 between the diaphragm 6 and the infrared filter layer 19, a plurality of pixel electrodes 29 between the insulating layer 31 and the infrared filter layer 19 in the sub-pixel region 1 and electrically connected to the display driving circuit 7, and a plurality of common electrodes 30 on the side of the light collecting structure 20 facing away from the substrate 3 in the sub-pixel region 1.
In some embodiments, as shown in fig. 2, the insulating layer 31 includes: a first protective layer 16, a dielectric layer 17 on the side of the first protective layer 16 facing away from the substrate base plate 3, and a second protective layer 18 on the side of the dielectric layer 17 facing away from the substrate base plate.
In implementation, the dielectric layer may increase the distance between the pixel electrode and the source and drain electrodes of the first thin film transistor, and may reduce the coupling capacitance between the pixel electrode and the source and drain conductive layer.
In some embodiments, as shown in fig. 3, 4, and 5, the driving circuit layer further includes: a plurality of scan lines GA and a plurality of data lines DA;
the plurality of scan lines GA includes: a plurality of first scan lines GA1 and a plurality of second scan lines GA2 extending in the first direction X;
the plurality of data lines DA include: a plurality of first data lines DA1 and a plurality of second data lines DA2 extending in the second direction Y; the second direction Y intersects the first direction X;
the first data line DA1 and the first scan line DA are electrically connected to the display driving circuit, and the second data line DA2 and the second scan line DA2 are electrically connected to the line recognition driving circuit.
In a specific implementation, the first data line is electrically connected to the source electrode of the first thin film transistor, the second data line is electrically connected to the source electrode of the second thin film transistor, the first scan line is electrically connected to the gate electrode of the first thin film transistor, and the second scan line is electrically connected to the gate electrode of the second thin film transistor.
In some embodiments, as shown in fig. 1, 3, and 4, the photoelectric conversion units 5 are located between the sub-pixel regions 1 adjacent in the first direction X;
as shown in fig. 3 and 4, a plurality of first data lines DA1 and a plurality of second data lines DA2 are arranged along a first direction X, and the plurality of first data lines DA1 and the plurality of second data lines DA2 are arranged in the same layer;
the first scan lines GA1 and the second scan lines GA2 are arranged along the second direction Y, and the first scan lines GA1 and the second scan lines GA2 are arranged in the same layer.
When the photoelectric conversion units are located between the sub-pixel regions adjacent in the first direction, in some embodiments, as shown in fig. 3, the plurality of sub-pixel regions 1 are divided into a plurality of pixels 32; each pixel 32 includes a plurality of sub-pixel regions 1 arranged in the first direction X;
the photoelectric conversion units 5 are in one-to-one correspondence with the pixels 32, with one pixel 32 being spaced between two photoelectric conversion units 5 adjacent in the first direction X.
In some embodiments, when the photoelectric conversion units are located between the sub-pixel regions adjacent in the first direction and the photoelectric conversion units correspond to pixels one by one, for example, as shown in fig. 3, the first scan lines GA1 and the second scan lines GA2 are alternately arranged. As shown in fig. 3, the first scanning line GA1 and the second scanning line GA2 electrically connected to the same row of pixels 32 and the photoelectric conversion unit 5 are located on both sides of the row of pixels 32 and the photoelectric conversion unit 5 in the second direction Y, respectively.
In some embodiments, as shown in fig. 3, the plurality of sub-pixel regions 1 includes a red sub-pixel region R, a green sub-pixel region G, and a blue sub-pixel region B, and each pixel 32 includes the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B arranged along the first direction X.
In a specific implementation, when the photoelectric conversion unit is located between the sub-pixel regions adjacent in the first direction, the source-drain conductive layer further includes a data line, and the gate conductive layer further includes a scan line. That is, the data line is arranged on the same layer as the source and drain electrodes of the transistors, and the scanning line is arranged on the same layer as the gate electrode of the transistors.
In the specific implementation, when the pixels and the photoelectric conversion units are in one-to-one correspondence, that is, the ratio of the number of pixels to the number of photoelectric conversion units is 1:1, a pixel and a photoelectric conversion unit can be regarded as a line identification display unit, and the line identification display units are periodically arranged in a display area, so that the display area of a display substrate can be used as a line identification area to realize multi-finger simultaneous identification or palm print identification.
Of course, in the implementation, 1 photoelectric conversion unit and a plurality of pixels may form a line recognition display unit, and the plurality of line recognition display units may be periodically arranged. Alternatively, a plurality of photoelectric conversion units and 1 pixel may form a line recognition display unit, and the line recognition display units may be periodically arranged. The ratio of the photoelectric conversion unit to the pixel can be selected according to actual needs.
It should be noted that fig. 2 may be, for example, a sectional view taken along AA' in fig. 3.
Alternatively, when the photoelectric conversion unit is located between the sub-pixel regions adjacent in the first direction, in some embodiments, as shown in fig. 4, the plurality of sub-pixel regions 1 are divided into a plurality of pixels 32; each pixel 32 includes two pixel units 33 arranged along the first direction X; each pixel unit 33 includes a plurality of sub-pixel regions 1 arranged in the first direction X;
two photoelectric conversion units 5 arranged in the second direction Y are provided between two adjacent pixel units 33.
In some embodiments, as shown in fig. 4, each pixel 32 corresponds to 4 photoelectric conversion units 5. That is, the ratio of the number of pixels to the number of photoelectric conversion units is 1:4. namely, 4 photoelectric conversion units and 1 pixel form a line identification display unit, and a plurality of line identification display units are arranged periodically.
The display substrate provided by the embodiment of the application has the following ratio of 1 between the number of pixels and the number of photoelectric conversion units: 4, one pixel unit corresponds to two photoelectric conversion units. Compared with the embodiment of one-to-one correspondence between the pixels and the photoelectric conversion units, the number of the first thin film transistors can be saved, the opening area of the sub-pixel area can be further increased, and the opening ratio of the sub-pixel area can be increased.
In some embodiments, when the ratio of the number of pixels to the number of photoelectric conversion units is 1:4, two second scan lines are included between two adjacent first scan lines.
In some embodiments, as shown in fig. 4, the plurality of sub-pixel regions 1 includes a red sub-pixel region R, a green sub-pixel region G, and a blue sub-pixel region B, and each pixel unit 33 includes the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B arranged along the first direction X.
In some embodiments, in each pixel, two first data lines corresponding to sub-pixel regions of the same light emitting color are electrically connected. In each pixel, two first data lines corresponding to the red sub-pixel area are electrically connected, two first data lines corresponding to the green sub-pixel area are electrically connected, and two first data lines corresponding to the blue sub-pixel area are electrically connected. In a specific implementation, a connection lead may be disposed at one end of the first data line in the extending direction so that the two first data lines are electrically connected. The connection lead may be located at a different film layer from the first data line.
Alternatively, in some embodiments, as shown in fig. 5, the photoelectric conversion units 5 are located between the sub-pixel regions 1 adjacent in the second direction Y.
In the embodiment, as shown in fig. 5, the first data line DA1 is electrically connected to the first thin film transistor T1 in the display driving circuit 7, and the second data line DA2 is electrically connected to the second thin film transistor T2 in the line recognition driving circuit 8.
In some embodiments, the orthographic projection of the second data line DA2 on the substrate coincides with the orthographic projection of the first data line DA1 on the substrate, and the second data line DA2 and the first data line DA1 are located on different film layers.
In an embodiment, for example, the first data line and the source/drain of each transistor are disposed on the same layer, and the second data line and the source/drain of each transistor are disposed on different layers.
According to the display substrate provided by the embodiment of the application, the orthographic projection of the second data line DA2 on the substrate is overlapped with the orthographic projection of the first data line DA1 on the substrate, so that the influence on the opening ratio of the sub-pixels can be avoided.
In order to clearly show the electrical connection relationship between the second data line DA2, the first data line DA1, and the transistors of the driving circuit layer, the second data line DA2 and the first data line DA1 are not shown in fig. 5 in a superimposed manner.
In some embodiments, as shown in fig. 5, a plurality of first scan lines GA1 and a plurality of second scan lines GA2 are alternately arranged along the second direction Y, and the first scan lines GA1 and the second scan lines GA2 are arranged in layers.
In some embodiments, as shown in fig. 5, the plurality of sub-pixel regions 1 are divided into a plurality of pixels 32; the pixel 32 includes two sub-pixel rows 36 extending in the first direction X and arranged in the second direction Y; the sub-pixel row 36 includes a plurality of sub-pixel regions 1 arranged in the first direction X;
two photoelectric conversion units 5 arranged in the first direction X are disposed between two adjacent sub-pixel rows 36.
In some embodiments, the first scan lines GA1 corresponding to two adjacent sub-pixel rows in the same pixel are electrically connected.
In some embodiments, as shown in fig. 5, the plurality of sub-pixel regions 1 includes a red sub-pixel region R, a green sub-pixel region G, and a blue sub-pixel region B, and each sub-pixel row 36 includes the red sub-pixel region R, the green sub-pixel region G, and the blue sub-pixel region B arranged along the first direction X.
In some embodiments, as shown in fig. 5, each pixel 32 corresponds to 4 photoelectric conversion units 5. That is, the ratio of the number of pixels to the number of photoelectric conversion units is 1:4. namely, 4 photoelectric conversion units and 1 pixel form a line identification display unit, and a plurality of line identification display units are arranged periodically.
To ensure the resolution of the pattern recognition, in some embodiments, the width of the photoelectric conversion layer in the first direction is 50.8 micrometers.
In some embodiments, as shown in fig. 3 to 5, the light holes 13 are square in orthographic projection on the substrate.
In some embodiments, the protrusions of the first resin layer are rounded in orthographic projection on the through substrate.
In the implementation, in the first direction, the ratio of the width of the photoelectric conversion layer to the width of the light transmission hole may be, for example, 25:1 to 26:1. for example, when the width of the photoelectric conversion layer in the first direction is 50.8 micrometers, each of the second electrodes may include, for example, 3 light holes, and each of the light holes may have a side length of, for example, 2 micrometers. When each second electrode includes 3 light holes, each second electrode corresponds to 3 protrusions of the first resin layer. In practice, the diameter of the protrusions of the first resin layer may be, for example, 10 micrometers to 30 micrometers, for example, 16 micrometers. In a specific implementation, when the side length of each light-transmitting hole is 2 micrometers, the diameter of the protrusion of the first resin layer is 16 micrometers, the diameter of the first opening region of the first light-shielding layer is, for example, 6.5 micrometers, and the diameter of the second opening region of the second light-shielding layer may be, for example, 10.5 micrometers.
In some embodiments, the distance between the light-transmitting aperture edge and the light-transmitting region edge of the sub-pixel region is greater than 5 microns.
In some embodiments, the display substrate further comprises: a first gate driving circuit and a second gate driving circuit; the first gate driving circuit is electrically connected with the first scanning line, and the second gate driving circuit is electrically connected with the second scanning line. The first gate driving circuit is used for providing a scanning signal to the first scanning line, and the second gate driving circuit is used for providing a scanning signal to the second scanning line.
In a specific implementation, the first gate driving circuit and the second gate driving circuit are located in the peripheral region, and the first gate driving circuit and the second gate driving circuit are respectively located at two sides of the display region in the first direction X.
Based on the same inventive concept, the embodiment of the application also provides a display panel, which comprises the display substrate provided by the embodiment of the application.
In some embodiments, the display panel further includes: an opposite substrate disposed opposite to the display substrate, and a liquid crystal layer disposed between the display substrate and the opposite substrate.
That is, the display panel provided by the embodiment of the application can be a liquid crystal display panel.
Based on the same inventive concept, the embodiment of the application also provides a display device, which comprises the display panel provided by the embodiment of the application.
In some embodiments, the display device further includes a backlight module disposed at one side of the display panel. In a specific implementation, the backlight module is located at one side of the substrate, which is away from the driving circuit layer. The light emitted by the backlight module can be used for line identification besides display, namely, the backlight module is shared by display and line identification, so that the cost can be saved.
In some embodiments, the display device further includes a driving chip bonded to the display substrate.
In a specific implementation, the display driving circuit and the line recognition driving circuit may share the same driving chip, that is, as shown in fig. 6, the first gate driving circuit GOA1 and the second gate driving circuit GOA2 are electrically connected to the same driving chip IC. Alternatively, as shown in fig. 7, the first gate driver circuit GOA1 may be electrically connected to the first driver chip IC1, and the second gate driver circuit GOA2 may be electrically connected to the second driver chip IC 2. For example, the first driving chip and the second driving chip are respectively located at two sides of the display area in the second direction.
In a specific implementation, the driving chip may be further electrically connected to a data signal line, and provide a data signal to the data signal line or receive a signal transmitted by the data line. For example, in the implementation, when the texture identification is required, the backlight or the screen light of the display product irradiates the texture and reflects the texture through the texture Gu Ji, the light reflected by the texture Gu Ji is incident to the photoelectric conversion unit in the display substrate, the photodiode unit receives the visible light excitation electrons and stores the visible light excitation electrons, the second thin film transistor in the texture identification driving circuit is controlled to be turned on row by row through the second scanning line, the signal of the photodiode unit is read through the second data line and output to the driving chip, and the driving chip converts the analog signal read by the second data line into a digital signal and can display the identified texture in a texture image manner through the display product.
The display device provided by the embodiment of the application comprises the following components: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device will be understood by those skilled in the art, and are not described herein in detail, nor should they be considered as limiting the application. The implementation of the display device can be referred to the embodiments of the display substrate and the display panel, and the repetition is not repeated.
In summary, in the display substrate, the display panel and the display device provided by the embodiments of the present application, the display driving circuit is disposed in the sub-pixel area, and the line identification driving circuit and the photoelectric conversion unit are disposed in the non-display area, so that each film layer for implementing the display function and each film layer for implementing the line identification function are fabricated on the same substrate, so as to implement display and line identification integration, avoid data transmission between the line identification device and the display device, and shorten the identity confirmation time. And moreover, the diaphragm is arranged on one side, deviating from the substrate base plate, of the photoelectric conversion unit, light rays are only incident to the photoelectric conversion unit through the light transmission area of the diaphragm, and the light rays in the sub-pixel area can be prevented from reaching the photoelectric conversion unit through film interface reflection, so that the line identification accuracy is ensured while the display and the line identification are integrated on the same substrate base plate.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (14)
1. A display substrate, the display substrate comprising: a plurality of sub-pixel areas arranged in an array, and a non-display area between the sub-pixel areas;
the display substrate includes: the device comprises a substrate, a driving circuit layer arranged on the substrate, a plurality of photoelectric conversion units arranged on one side of the driving circuit layer away from the substrate, and a plurality of diaphragms arranged on one side of the photoelectric conversion units away from the driving circuit layer;
the photoelectric conversion units and the diaphragms are positioned in the non-display area, and the orthographic projection of each photoelectric conversion unit on the substrate at least covers the orthographic projection of one diaphragm on the substrate;
the driving circuit layer includes: the display driving circuit is positioned in the sub-pixel area, and the line identification driving circuit is electrically connected with the photoelectric conversion units in a one-to-one correspondence manner in the non-display area;
the display substrate further includes, in the non-display region: a plurality of light gathering structures positioned at one side of the diaphragm away from the photoelectric conversion unit; the light condensing structures are arranged in one-to-one correspondence with the diaphragms, and are used for converging light rays to the diaphragms;
the light condensing structure includes: a microlens;
the microlens includes: a first resin layer on a side of the diaphragm facing away from the substrate; the light focusing structure further comprises a second resin layer positioned on one side of the first resin layer away from the diaphragm;
the surface of the first resin layer, which is away from one side of the substrate base plate, is provided with a bulge corresponding to the diaphragm;
the surface of one side of the second resin layer, which faces away from the substrate base plate, is a plane;
the refractive index of the first resin layer is greater than the refractive index of the second resin layer.
2. The display substrate according to claim 1, wherein the photoelectric conversion unit includes: a first electrode, a photoelectric conversion layer, and a second electrode which are stacked;
the first electrode is electrically connected with the line identification driving circuit;
the second electrode comprises at least one light hole; the orthographic projection of the light hole on the substrate falls into the orthographic projection of the photoelectric conversion layer on the substrate; the light hole is used as the diaphragm.
3. The display substrate according to claim 1, wherein the light-condensing structure further comprises a third resin layer between the diaphragm and the first resin layer, a first light-shielding layer between the diaphragm and the third resin layer, and a second light-shielding layer between the first resin layer and the third resin layer;
the refractive index of the third resin layer is equal to the refractive index of the first resin layer;
the first shading layer is provided with a first opening area, and the second shading layer is provided with a second opening area; the area of the first opening area is smaller than that of the second opening area; the orthographic projection of the first opening area on the substrate falls into the orthographic projection of the second opening area on the substrate, and the center of the first opening area, the center of the second opening area and the center of the diaphragm are overlapped on the orthographic projection of the substrate.
4. The display substrate of claim 1, wherein the display substrate further comprises: and an infrared filter layer between the diaphragm and the light condensing structure.
5. The display substrate of claim 4, further comprising: the display driving circuit comprises a diaphragm, an infrared filter layer, an insulating layer, a plurality of pixel electrodes, a plurality of common electrodes and a light condensing structure, wherein the insulating layer is positioned between the diaphragm and the infrared filter layer, the pixel electrodes are positioned between the insulating layer and the infrared filter layer in the sub-pixel area and are electrically connected with the display driving circuit, and the common electrodes are positioned at one side of the light condensing structure, which is far away from the substrate.
6. The display substrate according to any one of claims 1 to 5, wherein the driving circuit layer further comprises: a plurality of scan lines and a plurality of data lines;
the plurality of scan lines includes: a plurality of first scan lines and a plurality of second scan lines extending along a first direction;
the plurality of data lines includes: a plurality of first data lines and a plurality of second data lines extending in a second direction; the second direction intersects the first direction;
the first data line and the first scanning line are electrically connected with the display driving circuit, and the second data line and the second scanning line are electrically connected with the line identification driving circuit.
7. The display substrate according to claim 6, wherein the photoelectric conversion unit is located between the sub-pixel regions adjacent in the first direction;
the plurality of first data lines and the plurality of second data lines are arranged along the first direction, and the plurality of first data lines and the plurality of second data lines are arranged in the same layer;
the plurality of first scanning lines and the plurality of second scanning lines are arranged along the second direction, and the first scanning lines and the second scanning lines are arranged in the same layer.
8. The display substrate of claim 7, wherein a plurality of the sub-pixel regions are divided into a plurality of pixels; each of the pixels includes a plurality of sub-pixel regions arranged along the first direction;
the photoelectric conversion units are in one-to-one correspondence with the pixels, and one pixel is arranged between two adjacent photoelectric conversion units in the first direction.
9. The display substrate of claim 7, wherein a plurality of the sub-pixel regions are divided into a plurality of pixels; each pixel comprises two pixel units arranged along the first direction; each pixel unit comprises a plurality of sub-pixel areas arranged along the first direction;
two photoelectric conversion units arranged along the second direction are arranged between two adjacent pixel units;
in each pixel, two corresponding first data lines of the sub-pixel areas with the same luminous color are electrically connected.
10. The display substrate according to claim 6, wherein the photoelectric conversion unit is located between the sub-pixel regions adjacent in the second direction;
the orthographic projection of the second data line on the substrate is overlapped with the orthographic projection of the first data line on the substrate, and the second data line and the first data line are positioned on different film layers;
the plurality of first scanning lines and the plurality of second scanning lines are alternately arranged along the second direction, and the first scanning lines and the second scanning lines are arranged in the same layer.
11. The display substrate of claim 10, wherein a plurality of the sub-pixel regions are divided into a plurality of pixels; the pixel includes two sub-pixel rows extending in the first direction and arranged in the second direction; the sub-pixel row includes a plurality of sub-pixel regions arranged along the first direction;
two photoelectric conversion units arranged along the first direction are arranged between two adjacent sub-pixel rows;
and the first scanning lines corresponding to the two adjacent sub-pixel rows are electrically connected.
12. A display panel, characterized in that the display panel comprises a display substrate according to any one of claims 1-11.
13. The display panel of claim 12, further comprising: an opposite substrate disposed opposite to the display substrate, and a liquid crystal layer between the display substrate and the opposite substrate.
14. A display device characterized in that the display device comprises a display panel according to claim 12 or 13.
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| CN111488830A (en) * | 2019-11-01 | 2020-08-04 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN111881873A (en) * | 2020-08-04 | 2020-11-03 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN113013209A (en) * | 2021-02-19 | 2021-06-22 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
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| CN111488830A (en) * | 2019-11-01 | 2020-08-04 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN111881873A (en) * | 2020-08-04 | 2020-11-03 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and electronic equipment |
| CN113013209A (en) * | 2021-02-19 | 2021-06-22 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
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