CN110737126A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN110737126A
CN110737126A CN201911054098.8A CN201911054098A CN110737126A CN 110737126 A CN110737126 A CN 110737126A CN 201911054098 A CN201911054098 A CN 201911054098A CN 110737126 A CN110737126 A CN 110737126A
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CN
China
Prior art keywords
fingerprint identification
edge
substrate
display panel
metal layer
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Granted
Application number
CN201911054098.8A
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Chinese (zh)
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CN110737126B (en
Inventor
吴晓晓
蔡寿金
许喜爱
陈国照
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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Priority to CN201911054098.8A priority Critical patent/CN110737126B/en
Publication of CN110737126A publication Critical patent/CN110737126A/en
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Publication of CN110737126B publication Critical patent/CN110737126B/en
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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
    • 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
    • G02F1/136—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
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • 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
    • 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
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)

Abstract

The invention discloses display panels and display devices, and relates to the technical field of display, wherein each display panel comprises a display area and a non-display area, each display area comprises a fingerprint identification area, each fingerprint identification area comprises a fingerprint identification circuit, each fingerprint identification circuit comprises a fingerprint identification unit, a power line and a voltage output line, each power line and each voltage output line are electrically connected with the fingerprint identification unit, each display panel further comprises an array substrate, each array substrate comprises a substrate base plate, a metal layer arranged on the side of the substrate base plate , a second metal layer arranged on the side of the metal layer far away from the substrate base plate , and a third metal layer arranged on the side of the second metal layer far away from the substrate base plate , the power lines and the voltage output lines are both located on the third metal layer, and separate film layer structures are not needed to be arranged on the power lines and the voltage output lines connected with the fingerprint identification units, so that the wiring number of the fingerprint identification areas is reduced, the.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of display, in particular to display panels and display devices.
Background
As human fingerprints have characteristic and invariance, the fingerprint identification technology has the characteristics of good safety, high reliability and simple and convenient use, so that the fingerprint identification technology is widely applied to various fields for protecting personal information safety by , particularly the field of mobile terminals, such as mobile phones, notebook computers, tablet computers, digital cameras and the like.
The display area integrating fingerprint identification into the display device has become a trend, the fingerprint identification area comprises a fingerprint identification circuit, the fingerprint identification circuit comprises a fingerprint identification unit and a plurality of signal lines electrically connected with the fingerprint identification unit, and the circuit structure of the fingerprint identification area is complex and the wiring difficulty is high due to the fact that the number of the signal lines in the fingerprint identification area is large.
Disclosure of Invention
In view of this, the present invention provides types of display panels and display devices, where the display area of the display panel includes a fingerprint identification area, and a power line and a voltage output line electrically connecting the fingerprint identification area and the fingerprint identification unit are both disposed on the third metal layer of the display panel array substrate, which is beneficial to simplifying the circuit structure of the fingerprint identification area.
, the present application provides kinds of display panels, the display panel comprising a display area and a non-display area, the display area comprising a fingerprint identification area, the fingerprint identification area comprising a fingerprint identification circuit;
the fingerprint identification circuit comprises a fingerprint identification unit, and a power line and a voltage output line which are electrically connected with the fingerprint identification unit;
the display panel further comprises an array substrate, wherein the array substrate comprises a substrate, a metal layer arranged on the side of the substrate, a second metal layer arranged on the metal layer far away from the side of the substrate, and a third metal layer arranged on the second metal layer far away from the side of the substrate;
the power line and the voltage output line are both located on the third metal layer.
In a second aspect, the present application provides display devices comprising a display panel.
Compared with the prior art, the display panels and the display device provided by the invention at least realize the following beneficial effects:
this application is with the integrated display area that advances display panel in fingerprint identification district, the fingerprint identification district includes the fingerprint identification circuit, the fingerprint identification circuit includes the fingerprint identification unit and power cord and the voltage output line that links to each other with the fingerprint identification unit electricity, through all setting up power cord and voltage output line in the third metal level of display panel array substrate, need not to set up solitary rete structure for power cord and voltage output line that the fingerprint identification unit links to each other, third metal level in the multiplexing array substrate can, so can reduce the wiring quantity in fingerprint identification district promptly, be favorable to simplifying the circuit structure in fingerprint identification district, still be favorable to increasing the aperture ratio in the display area that the fingerprint identification district corresponds.
Of course, it is not specifically necessary for any product embodying the invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification , illustrate embodiments of the invention and together with the description , serve to explain the principles of the invention.
Fig. 1 is a schematic view illustrating types of display panels provided in an embodiment of the present application;
FIG. 2 is a diagram illustrating types of fingerprint identification circuits provided by an embodiment of the present application;
FIG. 3 is a cross-sectional view of AA's from FIG. 1, provided in accordance with an embodiment of the present application;
fig. 4 is a schematic routing diagram of a third metal layer according to an embodiment of the present disclosure;
fig. 5 is a partial top view of a display panel provided in an embodiment of the present application;
FIG. 6 is another AA' cross-sectional views of FIG. 1 provided in accordance with an embodiment of the present application;
FIG. 7 is a cross-sectional view of BB' of FIG. 1 according to an embodiment of the present disclosure;
fig. 8 is an top views of the display device provided in the embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least exemplary embodiments is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once a item is defined in figures, it need not be discussed further in in subsequent figures.
The display area integrating fingerprint identification into the display device has become a trend, the fingerprint identification area comprises a fingerprint identification circuit, the fingerprint identification circuit comprises a fingerprint identification unit and a plurality of signal lines electrically connected with the fingerprint identification unit, and the circuit structure of the fingerprint identification area is complex and the wiring difficulty is high due to the fact that the number of the signal lines in the fingerprint identification area is large.
In view of this, the present invention provides types of display panels and display devices, where the display area of the display panel includes a fingerprint identification area, and a power line and a voltage output line electrically connecting the fingerprint identification area and the fingerprint identification unit are both disposed on the third metal layer of the display panel array substrate, which is beneficial to simplifying the circuit structure of the fingerprint identification area.
Fig. 1 is a schematic diagram of types of display panels according to an embodiment of the present invention, fig. 2 is a schematic diagram of types of fingerprint identification circuits according to an embodiment of the present invention, fig. 3 is a cross-sectional diagram of types of AA' according to fig. 1, and fig. 4 is a schematic diagram of traces of a third metal layer according to an embodiment of the present invention, please refer to fig. 1-4, which provide types of display panels 100, wherein the display panel 100 includes a display area 10 and a non-display area 20, the display area 10 includes a fingerprint identification area 30, and the fingerprint identification area 30 includes a fingerprint identification circuit 200;
the fingerprint identification circuit 200 comprises a fingerprint identification unit 47, and a power line 531 and a voltage output line 532 which are electrically connected with the fingerprint identification unit 47;
the display panel 100 further includes an array substrate 40, the array substrate 40 including a substrate 41, a metal layer 42 disposed on the substrate 41 side, a second metal layer 43 disposed on the metal layer 42 side away from the substrate 41 side, and a third metal layer 44 disposed on the second metal layer 43 side away from the substrate 41 side;
the power supply line 531 and the voltage output line 532 are both located in the third metal layer 44.
Specifically, the present application provides display panels 100, the display panel 100 includes a display area 10 and a non-display area 20, the non-display area 20 of the display panel 100 may be present around the display area 10, as shown in fig. 1, the display area 10 of the display panel 100 includes a fingerprint identification area 30, that is, the fingerprint identification area 30 of the present application is integrated in the display area 10 of the display panel 100 and is not fingerprint-identified in the non-display area 20, the fingerprint identification area 30 of the present application includes a fingerprint identification circuit 200, the fingerprint identification circuit 200 includes a fingerprint identification unit 47 and a plurality of signal lines electrically connected to the fingerprint identification unit 47, the signal lines connected to the fingerprint identification unit 47 include at least a power line 531 and a voltage output line 532, the power line 531 is used for providing a power signal to the fingerprint identification unit 47, and the voltage output line 532 is used for conducting a voltage signal of the fingerprint identification unit 47 outwards.
It should be noted that fig. 1 only shows portion of the fingerprint identification area 30 integrated in the display area 10, the present application is not limited to multiplexing the area of the fingerprint identification area 30 and the area of the display area 10, in a specific case, the area of the fingerprint identification area 30 may be the same as the area of the display area 10, the present application is not limited to this specifically, and the area of the fingerprint identification area 30 may be adjusted according to actual requirements, fig. 2 only shows a schematic diagram of fingerprint identification circuits 200 electrically connected to fingerprint identification units 47, and each fingerprint identification unit 47 corresponds to fingerprint identification circuits 200 shown in fig. 2.
The display panel 100 further includes an array substrate 40, where the array substrate 40 includes a substrate 41, an th metal layer 42, a second metal layer 43, and a third metal layer 44, which are sequentially disposed, where the second metal layer 43 is disposed on a side of the th metal layer 42 away from the substrate 41, and the third metal layer 44 is disposed on a side of the second metal layer 43 away from the substrate 41, it should be noted that, only the substrate 41, the th metal layer 42, the second metal layer 43, and the third metal layer 44 of the array substrate 40 are illustrated here, and the th metal layer 42 and the second metal layer 43 are separated by an insulating layer 46, and the second metal layer 43 and the third metal layer 44 are also separated by the insulating layer 46.
This application all sets up in the third metal level 44 of array substrate 40 through power cord 531 and the voltage output line 532 with fingerprint identification district 30, need not to set up solitary rete structure for power cord 531 and the voltage output line 532 that fingerprint identification unit 47 links to each other, third metal level 44 in multiplexing array substrate 40 can, arrange the setting through the rete to fingerprint identification district 30 part signal line, can enough reduce the wiring quantity in fingerprint identification district 30, be favorable to simplifying the circuit structure in fingerprint identification district 30, can increase the aperture ratio in the display area 10 that fingerprint identification district 30 corresponds simultaneously, be favorable to improving display panel 100's display effect.
Referring to fig. 3 and 4, optionally, the touch panel further includes a plurality of touch electrodes 62 and touch signal lines 51 electrically connected to the touch electrodes 62 , the touch signal lines 51 are located on the third metal layer 44, each touch signal line 51 extends along a direction and is arranged along a second direction, and the direction intersects the second direction;
in the third metal layer 44, at least a portion of two adjacent touch signal lines 51 includes an -th trace 53 and a second trace 52, the -th trace 53 extends along the -th direction and is arranged along the second direction, at least a portion of the -th trace 53 is multiplexed as a power line 531, at least a portion of the -th trace 53 is multiplexed as a voltage output line 532, and the second trace 52 extends along the -th direction and is arranged along the second direction.
Specifically, the display panel 100 further includes a touch electrode 62 and a touch signal line 51 correspondingly connected to the touch electrode 62 , the touch signal line 51 is also disposed on the third metal layer 44 of the array substrate 40, i.e., disposed on the same layer as the power line 531 and the voltage output line 532, each touch signal line 51 is disposed in a manner extending along the direction of the display panel 100 and disposed along the second direction, the 0 direction intersects the second direction, a trace 53 and a second trace 52 are included between two touch signal lines 51 disposed adjacent to each other in the third metal layer 44 of the array substrate 40, wherein the trace 53 and the second trace 52 both extend along the direction and are disposed along the second direction, in a specific case, the touch signal line 51, i.e., the first trace 26 and the second trace 52, in the third metal layer 44 are disposed in parallel to each other, wherein a portion of the first trace is multiplexed as the power line 531, a portion of the trace 53 is multiplexed as the voltage 532, and a portion of the second trace 53 is multiplexed as the voltage output line 532, because the power line 531 and the fingerprint voltage output line 47 are electrically connected to the fingerprint signal line 52, the fingerprint identification unit is located in the display panel 100, and the fingerprint identification area is located in the display panel 100, the non-display panel 30, and the display panel 100, the display panel is capable of identifying that the fingerprint projection area is located in the non-display panel 100, and the display panel 100.
It should be noted that, in the fingerprint identification area 30 of the present application, the dummy trace between the adjacent touch signal lines 51 in the original third metal layer 44 is set as a normal signal line, that is, there is no disconnected long trace, and the long trace is multiplexed to be electrically connected to the power line 531 and the voltage output line 532 of the fingerprint identification unit 47, and there is no need to additionally set the power line 531 and the voltage output line 532, so that the number of traces in the fingerprint identification area 30 of the display panel 100 is reduced, and there is no need to set a separate film structure for the power line 531 and the voltage output line 532 connected to the fingerprint identification unit 47, which is beneficial to simplifying the circuit structure of the fingerprint identification area 30, and at the same time, the aperture ratio in the display area 10 corresponding to the fingerprint identification area 30 can be increased.
Fig. 5 is a partial top view of the display panel according to the embodiment of the present disclosure, referring to fig. 1, fig. 4 and fig. 5, optionally, two adjacent touch signal lines 51 include a th interval 54 therebetween along the second direction, and the power line 531 and the voltage output line 532 corresponding to the fingerprint identification circuit 200 are located in the st th interval 54.
Specifically, along the second direction, the th spacing 54 region is included between the adjacent touch signal lines 51, and in the fingerprint identification area 30 of the present application, the power line 531 and the voltage output line 532 corresponding to the fingerprint identification circuit 200 are located in the th th spacing 54, that is, in the fingerprint identification area 30, each of two adjacent touch signal lines 51 includes power lines 531 and voltage output lines 532, and the power lines 531 and the voltage output lines 532 are electrically connected to the fingerprint identification units 47 corresponding thereto, and are used for providing power signals to the fingerprint identification units 47 and conducting the voltage signals to the outside.
With reference to fig. 1, fig. 4 and fig. 5, optionally, each second trace 52 includes a plurality of insulated line segments 521 along the th direction, the length of each line segment 521 along the th direction is smaller than the length of the touch signal line 51, and a second interval 55 is included between two adjacent line segments 521.
Specifically, in order to avoid the occurrence of a dummy long trace in the third metal layer 44 in the non-fingerprint identification area, each second trace 52 located in the non-fingerprint identification area of the display area 10 includes a plurality of th line segments 521 insulated from each other in the second direction, that is, each second trace 52 is composed of a plurality of th line segments 521, and is arranged in an insulated manner between two adjacent th line segments 521 in the second direction, a second interval 55 is included between two adjacent th line segments 521, and the length of each th line segment 521 in the direction is smaller than the length of the touch signal line 51, in a specific case, the length of second traces 52 composed of a plurality of th line segments 521 is the same as the length of the touch signal line 51.
Referring to fig. 3 and fig. 5, optionally, the display panel 100 further includes a supporting pillar 56 and a light shielding layer 57, the light shielding layer 57 is located on the side of the third metal layer 44 away from the substrate 41, the supporting pillar 56 is located between the array substrate 40 and the light shielding layer 57, and an orthographic projection of the supporting pillar 56 on the substrate 41 is at least partially overlapped with an orthographic projection of the touch signal line 51, the trace 53, and the second trace 52 on the substrate 41.
Specifically, the display panel 100 further includes at least a liquid crystal layer 60, a supporting pillar 56, a light shielding layer 57 and a color film substrate 61, the liquid crystal layer 60 is disposed between the array substrate 40 and the color film substrate 61, the color film substrate 61 is located on the side of the third metal layer 44 away from the substrate 41, the light shielding layer 57 is disposed on the surface of the color film substrate 61 close to the array substrate 40, the supporting pillar 56 is also disposed between the array substrate 40 and the light shielding layer 57, that is, the supporting pillar 56 is disposed across the entire liquid crystal layer 60, the supporting pillar 56 is used for supporting the array substrate 40 and the color film substrate 61 above and below the liquid crystal layer 60, so as to avoid excessive deformation of the liquid crystal layer 60 when being squeezed by an external force, and thus ensure a normal display effect of the display panel 100.
With continued reference to fig. 3 and 5, optionally, the orthographic projection of the supporting pillars 56 on the substrate base 41 does not overlap with the orthographic projection of the second spacers 55 on the substrate base 41.
Specifically, in the display area 10, a second interval 55 is included between two adjacent th line segments 521 along the second direction, and any supporting column 56 is not disposed in the second interval 55, that is, the orthographic projection of the supporting column 56 on the substrate 41 is not overlapped with the orthographic projection of the second interval 55 on the substrate 41, the supporting column 56 is not disposed in the second interval 55, which is beneficial to preventing the supporting column 56 from displacing in the second interval 55 when the liquid crystal layer 60 is squeezed by an external force, and the display effect of the display panel 100 is easily affected because the displacement of the supporting column 56 affects the alignment of the liquid crystal layer 60, so that the supporting column 56 is not disposed in the second interval 55, which is beneficial to ensuring the display effect of the display panel 100.
With reference to fig. 3 and fig. 5, optionally, the orthographic projection of the light shielding layer 57 on the substrate 41 covers the orthographic projection of the support pillars 56 and the second spacers 55 on the substrate 41.
Specifically, in order to avoid light leakage, the light-shielding layer 57 is provided on the lower side of the color filter substrate 61 in the display panel 100, but the light-shielding layer 57 is not attached to the color filter substrate 61 entirely, and only an orthographic projection of the light-shielding layer 57 on the base substrate 41 can cover an orthographic projection of the support pillars 56 and the second spacers 55 on the base substrate 41. The orthographic projection of the light shielding layer 57 on the substrate 41 is limited to cover the orthographic projection of the supporting column 56 on the substrate 41, and the light leakage phenomenon caused by the fact that the supporting column 56 slightly displaces to enable liquid crystal molecules to shift or the light leakage phenomenon caused by the change of liquid crystal alignment can be avoided when the liquid crystal layer 60 is extruded by external large force.
With reference to fig. 3 and fig. 5, optionally, the orthographic projection of the second spacer 55 on the substrate base plate 41 includes an th edge 551 parallel to the second direction and a second edge 552 opposite to the th edge 551, the distance between the th edge 551 and the orthographic projection of the supporting pillar 56 on the substrate base plate 41 is smaller than the distance between the second edge 552 and the orthographic projection of the supporting pillar 56 on the substrate base plate 41, the distance between the supporting pillar 56 and the th edge 551 is D1, and D1 is greater than 3 μm.
Specifically, when the distance between the orthographic projection of the supporting column 56 on the substrate 41 and the edge 551 of the first line segment 521 is D6323 μm, the distance between the orthographic projection of the supporting column 56 on the substrate 41 and the edge 551 of the second line segment is too small, the distance between the orthographic projection of the supporting column 56 on the substrate 41 and the second spacer 55 is too small, that is, when the distance between the orthographic projection of the supporting column 56 on the substrate 41 and the edge 551 of the second is D1, when the distance between the orthographic projection of the supporting column 56 on the substrate 41 and the edge 551 of the first D62 μm, the distance between the supporting column 56 and the second spacer 55 is too small, that the distance between the supporting column 56 and the edge 551 of the second line segment 521 is too large or less than 3 μm, the displacement of the liquid crystal display panel caused by the neighboring display panel 100 is avoided, and the displacement of the display panel caused by the occurrence of the display panel is more than the displacement of the display panel due to the neighboring display panel 100 μm.
With reference to fig. 3 and fig. 5, optionally, the orthographic projection of the light-shielding layer 57 on the substrate 41 includes a third edge 571 parallel to the second direction and a fourth edge 572 opposite to the third edge 571, a distance between the third edge 571 and the second edge 552 is smaller than a distance between the third edge 571 and the edge 551, a distance between the third edge 571 and the edge 551 is smaller than a distance between the fourth edge 572 and the edge 551/the second edge 552, a distance between the third edge 571 and the second edge 552 is D2, and D2 is greater than 3 μm.
Specifically, the orthographic projection of the light shielding layer 57 on the substrate 41 can be in a transverse stripe shape, the transverse stripe-shaped light shielding layer 57 extends along the second direction and is arranged in the direction, the orthographic projection of the light shielding layer 57 on the substrate 41 comprises a third edge 571 and a fourth edge 572 which are parallel to the second direction, wherein the distance between the third edge 571 of the light shielding layer 57 and the second edge 552 of the second partition 55 is smaller than the distance between the third edge 571 and the third edge , the distance between the third edge 571 and the fourth edge is limited to be smaller than the distance between the fourth edge 572 and the edge 551/second edge 552, namely, compared with the projection of the light shielding layer 57 on the substrate 41 and the second partition 55, the distance between the third edge 571 of the light shielding layer 57 and the second edge 552 is the smallest, the distance D2 between the third edge 571 and the second edge 552 is limited to be larger than 3 μm, so as to avoid the close to the edge of the light shielding layer 57 and the second partition 55, and ensure that the light shielding layer 57 can be effectively changed when the alignment displacement of the light shielding layer 57 is caused by the change of the light shielding layer 82, and the displacement of the light shielding layer can be beneficial to ensure that the display panel can be displayed.
It should be noted that the light shielding layer 57 provided in the present application is only preferred embodiments, and the light shielding layer 57 may also be a block-like structure, and the present application is not particularly limited thereto as long as the orthographic projection of the light shielding layer 57 on the substrate 41 can cover the orthographic projection of the support pillar 56 and the second space 55 on the substrate 41.
Fig. 6 is another AA' cross-sectional views of fig. 1 provided in this embodiment of the application, and referring to fig. 6, optionally, the array substrate 40 further includes a electrode layer 45 located on the side of the third metal layer 44 away from the substrate 41 , an insulating layer 46 is disposed between the electrode layer 45 and the third metal layer 44, and in the display stage, the electrode layer 45 is used for receiving a common voltage signal.
Specifically, the array substrate 40 further includes a th electrode layer 45 located on the side of the third metal layer 44 away from the substrate 41 , an insulating layer 46 is disposed between the third metal layer 44 and the th electrode layer 45, in a display stage of the display panel 100, the th electrode layer 45 is used for receiving a common voltage signal, and a portion of the th electrode layer 45 used for receiving the common voltage signal may be connected to the third metal layer 44 by a via penetrating between the third metal layer 44 and the th electrode layer 45, it should be noted that the th electrode layer 45 herein may be a transparent conductive electrode layer, the th electrode layer 45 may be made of indium tin oxide, that is, the th electrode layer 45 is an ITO electrode layer.
Referring to fig. 7, which is a cross-sectional view of BB's shown in fig. 1 according to an embodiment of the present disclosure, referring to fig. 1 and fig. 7, optionally, fingerprint identification circuit 200 further includes a reference voltage terminal Vbias, where the reference voltage terminal Vbias is located at electrode layer 45, and in the fingerprint identification phase, reference voltage terminal Vbias is electrically connected to the anode of fingerprint identification unit 47 through a via, and in fingerprint identification area 30, reference voltage terminal Vbias is used for transmitting a reference voltage signal.
Specifically, fingerprint identification circuit 200 of the present application further includes a reference voltage terminal Vbias located at electrode layer 45, and during the fingerprint identification phase, reference voltage terminal Vbias of the present application may be electrically connected to the anode of fingerprint identification unit 47 through a via penetrating through insulating layer 46, i.e. electrode layer 45 within fingerprint identification region 30 is multiplexed to transmit the reference voltage signal during the fingerprint identification phase.
Referring to fig. 1, optionally, the fingerprint identification circuit 200 further includes a selection signal line Select, a Reset signal line Reset, an th capacitor Cst, a th thin film transistor T1, a second thin film transistor T2, and a third thin film transistor T3;
the reference voltage terminal Vbias is electrically connected to the terminal of the th capacitor Cst, the gate of the th thin film transistor T1 is electrically connected to the Reset signal line Reset, the th pole of the th thin film transistor T1 is electrically connected to the cathode of the fingerprint recognition unit 47, the second terminal of the th capacitor Cst, and the gate of the second thin film transistor T2, the second pole of the th thin film transistor T1 is electrically connected to the power supply line 531 and the of the second thin film transistor T2, the second pole of the second thin film transistor T2 is electrically connected to the th pole of the third thin film transistor T3, the gate of the third thin film transistor T3 is electrically connected to the selection signal line Select, and the second pole of the third thin film transistor T3 is electrically connected to the voltage output line 39532.
Specifically, the reference voltage terminal Vbias in the fingerprint identification circuit 200 is electrically connected to the terminal of the th capacitor Cst, the gate of the th thin film transistor T1 is electrically connected to the Reset signal line Reset, the th electrode of the th thin film transistor T1 is electrically connected to the cathode of the fingerprint identification unit 47, the second terminal of the th capacitor Cst, and the gate of the second thin film transistor T2, the second electrode of the th thin film transistor T1 is electrically connected to the power supply line 531, and the th electrode of the second thin film transistor T2, the second electrode of the second thin film transistor T2 is electrically connected to the th electrode of the third thin film transistor T3, the gate of the third thin film transistor T3 is electrically connected to the selection signal line Select, and the second electrode of the third thin film transistor T3 is electrically connected to the voltage output line 532.
Fig. 8 is a top view of types of display devices according to an embodiment of the present application, please refer to fig. 8, based on the same inventive concept , the present application further provides types of display devices 300, wherein the display device 300 includes a display panel 100, and the display panel 100 is any display panel 100 provided in the present application.
It should be noted that, for the embodiments of the display device 300 provided in the embodiments of the present application, reference may be made to the above-mentioned embodiments of the display panel 100, and repeated descriptions are omitted. The display device 300 provided by the present application may be: any product and component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a navigator and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
this application is with the integrated display area that advances display panel in fingerprint identification district, the fingerprint identification district includes the fingerprint identification circuit, the fingerprint identification circuit includes the fingerprint identification unit and power cord and the voltage output line that links to each other with the fingerprint identification unit electricity, through all setting up power cord and voltage output line in the third metal level of display panel array substrate, need not to set up solitary rete structure for power cord and voltage output line that the fingerprint identification unit links to each other, third metal level in the multiplexing array substrate can, so can reduce the wiring quantity in fingerprint identification district promptly, be favorable to simplifying the circuit structure in fingerprint identification district, still be favorable to increasing the aperture ratio in the display area that the fingerprint identification district corresponds.
Although specific embodiments of the invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention.

Claims (13)

  1. The kinds of display panels are characterized in that the display panel comprises a display area and a non-display area, wherein the display area comprises a fingerprint identification area which comprises a fingerprint identification circuit;
    the fingerprint identification circuit comprises a fingerprint identification unit, and a power line and a voltage output line which are electrically connected with the fingerprint identification unit;
    the display panel further comprises an array substrate, wherein the array substrate comprises a substrate, a metal layer arranged on the side of the substrate, a second metal layer arranged on the metal layer far away from the side of the substrate, and a third metal layer arranged on the second metal layer far away from the side of the substrate;
    the power line and the voltage output line are both located on the third metal layer.
  2. 2. The display panel of claim 1, further comprising a plurality of touch electrodes and touch signal lines electrically connected to the touch electrodes , wherein the touch signal lines are located in the third metal layer, each touch signal line extends along a direction and is arranged along a second direction, and the direction intersects the second direction;
    at least two adjacent touch signal lines of the third metal layer include th traces and second traces, the th trace extends along the th direction and is arranged along the second direction, at least a portion of the th trace is multiplexed as the power line, at least a portion of the th trace is multiplexed as the voltage output line, and the second trace extends along the th direction and is arranged along the second direction.
  3. 3. The display panel according to claim 2, wherein two adjacent touch signal lines in the second direction include an th interval therebetween, and the power line and the voltage output line corresponding to the same fingerprint identification circuit are located in the same th and th intervals.
  4. 4. The display panel according to claim 2, wherein along the th direction, each of the second traces includes a plurality of th line segments insulated from each other, along the th direction, each of the th line segments has a length smaller than that of the touch signal line, and a second space is included between two adjacent th line segments.
  5. 5. The display panel according to claim 3, further comprising a supporting pillar and a light shielding layer, wherein the light shielding layer is located on the side of the third metal layer away from the substrate, the supporting pillar is located between the array substrate and the light shielding layer, and an orthographic projection of the supporting pillar on the substrate at least partially overlaps with orthographic projections of the touch signal line, the routing line and the second routing line on the substrate.
  6. 6. The display panel of claim 5, wherein an orthographic projection of the support posts on the substrate base plate does not overlap with an orthographic projection of the second spacers on the substrate base plate.
  7. 7. The display panel according to claim 5, wherein an orthographic projection of the light shielding layer on the substrate base plate covers an orthographic projection of the support posts and the second spacers on the substrate base plate.
  8. 8. The display panel of claim 6, wherein the orthographic projection of the second interval on the substrate base plate comprises an th edge parallel to the second direction and a second edge opposite to the th edge, the distance between the orthographic projection of the supporting column on the substrate base plate and the th edge is smaller than the distance between the orthographic projection of the supporting column on the substrate base plate and the second edge, the distance between the supporting column and the th edge is D1, and D1 is larger than 3 μm.
  9. 9. The display panel according to claim 7, wherein an orthographic projection of the light-shielding layer on the substrate comprises a third edge parallel to the second direction and a fourth edge opposite to the third edge, wherein a distance between the third edge and the second edge is smaller than a distance between the third edge and the th edge, and a distance between the third edge and the th edge is smaller than a distance between the fourth edge and the th edge/the second edge, and wherein a distance between the third edge and the second edge is D2, and D2 > 3 μm.
  10. 10. The display panel of claim 1, wherein the array substrate further comprises a electrode layer located on a side of the third metal layer away from the substrate , an insulating layer is disposed between the electrode layer and the third metal layer, and the electrode layer is configured to receive a common voltage signal during a display period.
  11. 11. The display panel of claim 10, wherein the fingerprint identification circuit further comprises a reference voltage terminal located at the th electrode layer, wherein the reference voltage terminal is electrically connected to the anode of the fingerprint identification unit through a via hole during a fingerprint identification phase, and the reference voltage terminal is used for transmitting a reference voltage signal in the fingerprint identification region.
  12. 12. The display panel according to claim 1, wherein the fingerprint recognition circuit further comprises a selection signal line, a reset signal line, an th capacitor, a th thin film transistor, a second thin film transistor, and a third thin film transistor;
    the reference voltage terminal is electrically connected to the th terminal of the th capacitor, the gate of the th thin film transistor is electrically connected to the reset signal line, the th electrode of the th thin film transistor is electrically connected to the cathode of the fingerprint recognition unit, the second terminal of the th capacitor, and the gate of the second thin film transistor, the th thin film transistor is electrically connected to the power line and the th electrode of the second thin film transistor, the second electrode of the second thin film transistor is electrically connected to the th electrode of the third thin film transistor, the gate of the third thin film transistor is electrically connected to the selection signal line, and the second electrode of the third thin film transistor is electrically connected to the voltage output line.
  13. A display device of , comprising the display panel of any of claims 1-12 through .
CN201911054098.8A 2019-10-31 2019-10-31 Display panel and display device Active CN110737126B (en)

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