CN110806666A - COA substrate and display panel - Google Patents

COA substrate and display panel Download PDF

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Publication number
CN110806666A
CN110806666A CN201911026149.6A CN201911026149A CN110806666A CN 110806666 A CN110806666 A CN 110806666A CN 201911026149 A CN201911026149 A CN 201911026149A CN 110806666 A CN110806666 A CN 110806666A
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CN
China
Prior art keywords
layer
groove
color
color resistance
thin film
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Granted
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CN201911026149.6A
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Chinese (zh)
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CN110806666B (en
Inventor
邹晓灵
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Huizhou China Star Optoelectronics Technology Co Ltd
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Huizhou China Star Optoelectronics Technology Co Ltd
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Priority to CN201911026149.6A priority Critical patent/CN110806666B/en
Priority to PCT/CN2019/127809 priority patent/WO2021077602A1/en
Publication of CN110806666A publication Critical patent/CN110806666A/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
    • G02F1/136—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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • 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
    • G02F1/136222—Colour filters incorporated in the active matrix substrate

Abstract

The invention provides a COA substrate and a display panel, wherein the COA substrate comprises a substrate, a thin film transistor and a color resistance layer, the thin film transistor is arranged on the substrate, the color resistance layer is arranged on the thin film transistor, the color resistance layer comprises a plurality of color resistances which are arranged in an overlapped mode, a first groove is formed in an overlapped area of the thin film transistor corresponding to the color resistance layer, and the color resistance layer is filled into the first groove; the first groove is formed in the overlapping area of the thin film transistor corresponding to the color resistance layer, so that when the color resistance layer is formed, the overlapping portion of the color resistance layer can be filled in the first groove, the overlapping portion of the color resistance layer is prevented from being upwards protruded due to reduction, one side of the color resistance layer close to the liquid crystal layer is flat, the color resistance layer of the existing COA substrate is prevented from being protruded, and the liquid crystal orientation is abnormal, so that the technical problem of display is influenced.

Description

COA substrate and display panel
Technical Field
The invention relates to the technical field of display, in particular to a COA substrate and a display panel.
Background
The prior display panel is used for improving the aperture opening ratio, the Color resistance layer is arranged On one side of the Array substrate, a COA substrate (Color Filter On Array) is obtained, a Color Filter is not required to be arranged On the Array substrate, a black matrix is not required to be arranged On the Color resistance layer, the aperture opening ratio is improved, but in the Color resistance forming process, in order to facilitate the formation of the Color resistance, a certain overlapping part is formed at the junction of the adjacent Color resistances, the Color resistance layer is enabled to form a certain bulge at the junction, the bulge of the Color resistance layer can cause the abnormal orientation of liquid crystals, the display is influenced, and the display is poor.
Therefore, the color resistance layer of the prior COA substrate has the technical problem of projection, which causes abnormal liquid crystal orientation and influences display.
Disclosure of Invention
The invention provides a COA substrate and a display panel, which are used for solving the technical problem that display is influenced due to abnormal liquid crystal orientation caused by bulges of a color resistance layer of the conventional COA substrate.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the present invention provides a COA substrate, comprising:
a substrate;
a thin film transistor disposed on the substrate;
the color resistance layer is arranged on the thin film transistor and comprises a plurality of color resistances which are arranged in an overlapped mode;
the thin film transistor is provided with a first groove in an overlapping area corresponding to the color resistance layer, and the color resistance layer is filled into the first groove.
In the COA base plate provided by the present invention, the substrate is formed with a second groove in an overlapping region corresponding to the color resist layer, the thin film transistor is filled in the overlapping region corresponding to the color resist layer to form a first groove, and a projection of the second groove and the first groove on the color resist layer is overlapped.
In the COA substrate provided by the present invention, the width of the second groove is greater than or equal to the width of the first groove.
In the COA substrate provided by the invention, the width of the first groove is greater than or equal to the width of the overlapped area of the color resistance layers.
In the COA substrate provided by the invention, the depth of the second groove is greater than or equal to one half of the thickness of the color resistance layer.
In the COA substrate provided by the invention, the thin film transistor comprises a grid layer, a grid insulating layer, an active layer, an interlayer insulating layer, a source drain layer and a planarization layer, wherein a first groove is formed in the overlapping area of the corresponding color resistance layer of the planarization layer.
In the COA substrate provided by the invention, the gate layer is etched to form a gate and a scanning line, and at least one of the gate and the scanning line is arranged in the second groove.
In the COA substrate provided by the invention, the source drain layer is etched to form a source drain and a data line, and at least one of the source drain and the data line is arranged in the second groove.
In the COA substrate provided by the invention, the color resistance layer comprises a red color resistance, a green color resistance and a blue color resistance, the thin film transistor is provided with a first groove in an overlapping area corresponding to the red color resistance and the green color resistance, and the overlapping part of the red color resistance and the green color resistance is arranged in the first groove.
Meanwhile, the present invention provides a display panel, including:
a COA substrate;
the pixel electrode layer is arranged on the COA substrate;
the liquid crystal layer is arranged on the pixel electrode layer;
a common electrode layer disposed on the liquid crystal layer;
the COA substrate comprises a substrate, a thin film transistor and a color resistance layer, wherein the thin film transistor is arranged on the substrate, the color resistance layer is arranged on the thin film transistor and comprises a plurality of color resistors which are arranged in an overlapped mode, a first groove is formed in an overlapped area of the thin film transistor corresponding to the color resistance layer, and the color resistance layer is filled into the first groove.
Has the advantages that: the invention provides a COA substrate and a display panel, wherein the COA substrate comprises a substrate, a thin film transistor and a color resistance layer, the thin film transistor is arranged on the substrate, the color resistance layer is arranged on the thin film transistor, the color resistance layer comprises a plurality of color resistances which are arranged in an overlapped mode, a first groove is formed in an overlapped area of the thin film transistor corresponding to the color resistance layer, and the color resistance layer is filled into the first groove; the first groove is formed in the overlapping area of the thin film transistor corresponding to the color resistance layer, so that when the color resistance layer is formed, the overlapping portion of the color resistance layer can be filled in the first groove, the overlapping portion of the color resistance layer is prevented from being upwards protruded due to reduction, one side of the color resistance layer close to the liquid crystal layer is flat, the color resistance layer of the existing COA substrate is prevented from being protruded, and the liquid crystal orientation is abnormal, so that the technical problem of display is influenced.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional display panel;
FIG. 2 is a first schematic view of a COA substrate according to an embodiment of the present invention;
FIG. 3 is a second schematic view of a COA substrate according to an embodiment of the present invention;
FIG. 4 is a third schematic view of a COA substrate according to an embodiment of the present invention;
fig. 5 is a first schematic diagram of a display panel according to an embodiment of the invention;
fig. 6 is a second schematic view of a display panel according to an embodiment of the invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
The embodiment of the invention is used for solving the technical problem that the display is influenced by abnormal liquid crystal orientation due to the fact that the color resistance layer of the conventional COA substrate is raised.
As shown in fig. 1, the conventional display panel includes a substrate 111, a gate layer 112, a gate insulating layer 113, a color resistance layer 114, a pixel electrode layer 115, and a liquid crystal layer 116, where the color resistance layer 114 includes a red color resistor 1141 and a green color resistor 1142, in the prior art, in order to increase an aperture ratio, the color resistance layer is prepared on an array substrate, and a black matrix layer is eliminated, but in order to form the color resistance layer, an overlapping portion exists between the color resistors, as shown in fig. 1, an overlapping portion exists between the red color resistor 1141 and the green color resistor 1142, and the overlapping portion protrudes upward in the display panel, so that the pixel electrode layer protrudes, and further, the liquid crystal alignment of the liquid crystal layer in the overlapping region is abnormal, thereby affecting display in the display and causing poor display.
As shown in fig. 2, an embodiment of the present invention provides a COA substrate, including:
a substrate 21;
a thin film transistor 22 provided over the substrate 21;
the color resistance layer 23 is arranged on the thin film transistor 22 and comprises a plurality of color resistances which are arranged in an overlapped mode;
the thin film transistor 22 has a first recess 2261 formed in the overlapping area 241 corresponding to the color resist layer 23, and the color resist layer 23 is filled in the first recess 2261.
The embodiment of the invention provides a COA substrate, which comprises a substrate, a thin film transistor and a color resistance layer, wherein the thin film transistor is arranged on the substrate, the color resistance layer is arranged on the thin film transistor, the color resistance layer comprises a plurality of color resistors which are arranged in an overlapped mode, a first groove is formed in an overlapped area of the thin film transistor corresponding to the color resistance layer, and the color resistance layer is filled into the first groove; the first groove is formed in the overlapping area of the thin film transistor corresponding to the color resistance layer, so that when the color resistance layer is formed, the overlapping portion of the color resistance layer can be filled in the first groove, the overlapping portion of the color resistance layer is prevented from being upwards protruded due to reduction, one side of the color resistance layer close to the liquid crystal layer is flat, the color resistance layer of the existing COA substrate is prevented from being protruded, and the liquid crystal orientation is abnormal, so that the technical problem of display is influenced.
It should be noted that the color-resist layer is filled into the first groove, and the first groove and the color-resist layer are shown as an overlapping portion in fig. 2.
In one embodiment, as shown in fig. 3, the substrate 21 is formed with a second groove 211 at the overlapping area 241 corresponding to the color-resist layer 23, the thin film transistor 22 is filled into the second groove 211 at the overlapping area 241 corresponding to the color-resist layer 23 to form a first groove 2261, and there is coincidence between the second groove 241 and the projection of the first groove 2261 on the color-resist layer 23; when the first groove is arranged, the substrate can be etched to form the second groove when the substrate is prepared, so that the thin film transistor can be filled in the second groove, the thin film transistor can be filled in the second groove to form the first groove, correspondingly, in the overlapping area corresponding to the color resistance layer, the overlapping part of the color resistance layer can be filled downwards due to the existence of the first groove, so that the overlapping part of the color resistance layer can not be upwards protruded but downwards protruded, the side of the color resistance layer facing the liquid crystal layer is relatively flat, correspondingly, the liquid crystal layer can not cause the deviation of the height of the liquid crystal layer or the alignment of the liquid crystal due to the protrusion of the color resistance layer when being formed, the alignment of the liquid crystal layer is good, the aperture ratio of the display panel is improved by using the COA substrate, the liquid crystal is well aligned, and the protrusion of the color resistance layer of the existing COA substrate is relieved, leading to the technical problem that the liquid crystal orientation is abnormal so as to influence the display.
In one embodiment, as shown in fig. 3, a width L1 of the second groove 211 is greater than or equal to a width L2 of the first groove 2261, that is, L1> -L2, and when the second groove is disposed, the width of the second groove may be set to be greater than the width of the first groove, so that the second groove accommodates the thin film transistor, and the first groove of the thin film transistor only accommodates an overlapping portion of the color resistance layer, so that the width of the first groove may be smaller, and the groove is prevented from being too large to affect the integrity of the film layer, so that when the color resistance layer is accommodated, the operation of the thin film transistor is not affected, for example, the first groove is prevented from being conducted with a via hole where the source/drain layer and the pixel electrode layer are in contact, so that a driving circuit in the display panel is complete, and the driving circuit is not affected by corrosion and the like.
In one embodiment, the width of the second groove comprises 10 microns.
In an embodiment, the width of the first groove is greater than or equal to the width of the overlapping area of the color-resist layer, when the first groove is provided, it is ensured that the width of the first groove is greater than or equal to the width of the overlapping area of the color-resist layer, so that the overlapping portion of the color-resist layer can be filled into the first groove, thereby reducing the height of the upward protrusion of the color-resist layer, even the color-resist layer does not protrude upward, and meanwhile, when the first groove is provided, the first groove is prevented from being even too large.
In one embodiment, the depth of the second groove is greater than or equal to one-half of the thickness of the color resistance layer; when the second groove is formed, considering the thickness of the color resistance layer, the protrusion of the color resistance layer may occupy about one half of the thickness of the color resistance layer, and the depth of the second groove may be set to be greater than or equal to one half of the thickness of the color resistance layer, so that the color resistance layer may not protrude upwards, and the color resistance layer may be prevented from sinking downwards as much as possible, so that the side of the color resistance layer facing the liquid crystal layer is relatively flat, thereby alleviating the technical problem that the display is affected by abnormal liquid crystal orientation due to the protrusion of the color resistance layer of the existing COA substrate.
In one embodiment, the depth of the first groove is greater than or equal to one-half of the thickness of the color resistance layer, setting the width of the first groove as the width of the overlapping region of the color resist layer when the first groove is provided, then the depth of the first groove is set to be half of the thickness of the color resistance layer, so that the color resistance layer can be filled into the first groove, and the side close to the liquid crystal layer does not generate upward projection and downward depression, so that the side of the color resistance layer close to the liquid crystal layer is flat, further, the alignment of the liquid crystal is normal, the display panel displays normally, and the depth of the first groove is determined according to the thickness of the color resist layer, for example, if the height of the protrusion of the color resist layer is a, the depth of the first groove can be a, so that the height of the downward projection of the overlapped portion of the color resist layer is a, and the direction of the color resist layer toward the liquid crystal layer is flat.
In one embodiment, as shown in fig. 2 and fig. 3, the thin film transistor 22 includes a gate electrode layer 221, a gate insulating layer 222, an active layer 223, an interlayer insulating layer 224, a source drain layer 225, and a planarization layer 226, where the planarization layer 226 is formed with a first groove 2261 in an overlapping area 2421 corresponding to the color resistance layer 23, and when the first groove is formed, the planarization layer is etched to form the first groove, so that the first groove is formed on the thin film transistor, the overlapping portion of the color resistance layer is filled in the first groove, and a side of the color resistance layer facing the liquid crystal layer is flattened, so that the formed liquid crystal layer is aligned accurately and highly uniform, and thus, while the aperture ratio is improved, the display is normal.
In an embodiment, when the first groove is formed in the planarization layer, since the source/drain electrode contacts the pixel electrode formed by the pixel electrode layer through the via hole of the planarization layer, when the first groove is formed, the first groove is prevented from contacting the via hole of the planarization layer as much as possible, so that the conduction between the pixel electrode layer and the source/drain electrode layer is not affected, and when the first groove is formed in the planarization layer, the first groove should be prevented from penetrating the planarization layer, which causes the color resistance layer to extend to the film layers such as the source/drain electrode layer, and affects the operation of the source/drain electrode layer.
In one embodiment, as shown in fig. 3, the gate layer is etched to form a gate and a scan line, at least one of the gate and the scan line is disposed in the second recess, when the gate layer is disposed, for a display panel adopting a bottom gate structure, that is, the gate layer is disposed on the substrate, the gate insulating layer is disposed on the gate layer, the active layer is disposed on the gate insulating layer, the interlayer insulating layer is disposed on the active layer, the source/drain layer is disposed on the interlayer insulating layer, the planarization layer is disposed on the source/drain layer, the gate or the scan line formed by the gate layer is disposed or routed through the second recess, so that the gate layer moves downward, and the corresponding upper film layer also moves downward, so that the thin film transistor forms the first recess, and the overlapping portion of the corresponding color resistance layer is disposed in the first recess, therefore, the color resistance layer does not bulge upwards, the liquid crystal layer is normally aligned, the aperture opening ratio of the display panel is increased, and the display panel normally displays.
In one embodiment, the source drain layer is etched to form a source drain and a data line, and at least one of the source drain and the data line is arranged in the second groove; when arranging a source drain electrode and a data wire, for a display panel adopting a top gate structure, namely arranging a source drain electrode layer on the substrate, arranging an interlayer insulating layer on the source drain electrode layer, arranging an active layer on the interlayer insulating layer, arranging a gate insulating layer on the active layer, arranging a gate electrode layer on the gate insulating layer, arranging a planarization layer on the gate electrode layer, routing the source drain electrode or the data wire formed by etching the source drain electrode layer through a second groove, so that the source drain electrode layer moves downwards, and accordingly, a corresponding film layer on the source drain electrode layer moves downwards, a first groove is formed in an overlapping area corresponding to the color resistance layer by the thin film transistor, the overlapping part of the color resistance layer is filled in the first groove, the color resistance layer does not bulge upwards, and the liquid crystal layer is aligned normally, therefore, the aperture ratio of the display panel is increased, and the display panel displays normally.
In one embodiment, as shown in fig. 4, the color resistor layer 23 includes a red color resistor 231, a green color resistor 232, and a blue color resistor 233, the thin film transistor has a first groove formed at an overlapping region corresponding to the red color resistor 231 and the green color resistor 232, and an overlapping portion of the red color resistor 231 and the green color resistor 232 is disposed in the first groove; when the first groove is arranged, the first groove can be arranged only in the overlapping area of the red color resistor and the green color resistor, so that the overlapping part of the red color resistor and the green color resistor is arranged in the first groove, the overlapping part of the red color resistor and the green color resistor is filled downwards, the red color resistor and the green color resistor are flat towards one side of the liquid crystal layer, the liquid crystal alignment of the overlapping area of the red color resistor and the green color resistor is normal, and the corresponding area of the red color resistor and the green color resistor is displayed normally.
In one embodiment, the color resistance layer includes a red color resistance, a green color resistance and a blue color resistance, the thin film transistor has a first groove formed in an overlapping area corresponding to the red color resistance and the green color resistance, the thin film transistor has a first groove formed in an overlapping area corresponding to the green color resistance and the blue color resistance, the thin film transistor has a first groove formed in an overlapping area corresponding to the blue color resistance and the red color resistance, an overlapping portion of the red color resistance and the green color resistance is disposed in the first groove, an overlapping portion of the green color resistance and the blue color resistance is disposed in the first groove, and an overlapping portion of the blue color resistance and the red color resistance is disposed in the first groove, that is, all overlapping portions of the color resistance layer, by forming the first groove in the corresponding overlapping area, the color resistance of the overlapping portion is disposed in the first groove, therefore, the whole surface of one side of the color resistance layer close to the liquid crystal layer is flat, liquid crystal of the liquid crystal layer is normally aligned when the liquid crystal layer is formed, and the display panel normally displays when the opening rate is improved by using the COA substrate.
In one embodiment, when the groove is arranged in the overlapping area corresponding to the color resistance layer, the size of the groove is arranged according to the size of the protrusion of the color resistance layer, so that the color resistance layer does not protrude upwards or dent, and the side of the color resistance layer close to the liquid crystal layer is flat.
In one embodiment, the material of the substrate comprises glass.
As shown in fig. 5, an embodiment of the present invention provides a display panel, including:
a COA substrate;
a pixel electrode layer 25 disposed on the COA substrate;
a liquid crystal layer 26 provided on the pixel electrode layer 25;
a common electrode layer 278 provided on the liquid crystal layer 26;
the COA substrate includes a substrate 21, a thin film transistor 22 and a color resistance layer 23, the thin film transistor 22 is disposed on the substrate 21, the color resistance layer 23 is disposed on the thin film transistor 22, the color resistance layer 23 includes a plurality of color resistances which are overlapped, a first groove 2261 is formed in an overlapping area 241 of the thin film transistor 22 corresponding to the color resistance layer 23, and the color resistance layer 23 is filled into the first groove 2261.
The embodiment of the invention provides a display panel, which comprises a COA substrate, a pixel electrode layer, a liquid crystal layer and a common electrode layer, wherein the pixel electrode layer is arranged on the COA substrate, the liquid crystal layer is arranged on the pixel electrode layer, and the common electrode layer is arranged on the liquid crystal layer; the first groove is formed in the overlapping area of the thin film transistor corresponding to the color resistance layer, so that when the color resistance layer is formed, the overlapping portion of the color resistance layer can be filled in the first groove, the overlapping portion of the color resistance layer is prevented from being upwards protruded due to reduction, one side of the color resistance layer close to the liquid crystal layer is flat, the color resistance layer of the existing COA substrate is prevented from being protruded, and the liquid crystal orientation is abnormal, so that the technical problem of display is influenced.
In one embodiment, as shown in fig. 5, the liquid crystal layer 26 includes a first alignment layer 261, a liquid crystal 262 and a second alignment layer 263, when the color resist layer is disposed in the first groove of the thin film transistor, the color resist layer does not protrude upwards, so as to avoid the problem that the color resist layer protrudes upwards to cause damage or displacement of the first alignment layer due to external factors, so that the liquid crystal can be normally aligned in the first alignment layer, and the first alignment layer is not damaged or displaced, so as to normally align the liquid crystal, and the display panel normally displays.
In an embodiment, as shown in fig. 6, compared with the existing display panel, in the display panel provided in the embodiment of the present invention, a second groove is formed on a substrate, and then a thin film transistor is disposed in the second groove, so that the thin film transistor forms a first groove, and an overlapped portion of a color resistance layer is disposed in the first groove, so that there is no upward protrusion in the color resistance layer, and the corresponding pixel electrode layer does not protrude upward, so that the liquid crystal alignment of the liquid crystal layer is normal, and the display panel normally displays while the aperture ratio is improved by using the COA substrate.
According to the above embodiment:
the invention provides a COA substrate and a display panel, wherein the COA substrate comprises a substrate, a thin film transistor and a color resistance layer, the thin film transistor is arranged on the substrate, the color resistance layer is arranged on the thin film transistor, the color resistance layer comprises a plurality of color resistances which are arranged in an overlapped mode, a first groove is formed in an overlapped area of the thin film transistor corresponding to the color resistance layer, and the color resistance layer is filled into the first groove; the first groove is formed in the overlapping area of the thin film transistor corresponding to the color resistance layer, so that when the color resistance layer is formed, the overlapping portion of the color resistance layer can be filled in the first groove, the overlapping portion of the color resistance layer is prevented from being upwards protruded due to reduction, one side of the color resistance layer close to the liquid crystal layer is flat, the color resistance layer of the existing COA substrate is prevented from being protruded, and the liquid crystal orientation is abnormal, so that the technical problem of display is influenced.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. A COA substrate, comprising:
a substrate;
a thin film transistor disposed on the substrate;
the color resistance layer is arranged on the thin film transistor and comprises a plurality of color resistances which are arranged in an overlapped mode;
the thin film transistor is provided with a first groove in an overlapping area corresponding to the color resistance layer, and the color resistance layer is filled into the first groove.
2. The COA substrate of claim 1, wherein the substrate is formed with a second recess at an overlapping area corresponding to the color resist layer, the thin film transistor is filled into the second recess at the overlapping area corresponding to the color resist layer to form a first recess, and the second recess coincides with a projection of the first recess onto the color resist layer.
3. The COA substrate of claim 2, wherein a width of the second groove is greater than or equal to a width of the first groove.
4. The COA substrate of claim 3 wherein the first recess has a width greater than or equal to a width of the overlap region of the color resist layer.
5. The COA substrate of claim 2, wherein the depth of the second recess is greater than or equal to one-half the thickness of the color-resist layer.
6. The COA substrate of claim 2, wherein the thin film transistor includes a gate layer, a gate insulating layer, an active layer, an interlayer insulating layer, a source drain layer, and a planarization layer, wherein the planarization layer has a first recess formed at an overlapping area corresponding to the color resist layer.
7. The COA substrate of claim 6, wherein the gate layer is etched to form a gate and a scan line, at least one of the gate and the scan line being disposed in the second recess.
8. The COA substrate of claim 6, wherein the source drain layer is etched to form a source drain and a data line, at least one of the source drain and the data line being disposed in the second recess.
9. The COA substrate of claim 1, wherein the color resist layer comprises a red color resist, a green color resist and a blue color resist, the thin film transistor has a first groove formed in an overlapping region corresponding to the red color resist and the green color resist, and an overlapping portion of the red color resist and the green color resist is disposed in the first groove.
10. A display panel, comprising:
a COA substrate;
the pixel electrode layer is arranged on the COA substrate;
the liquid crystal layer is arranged on the pixel electrode layer;
a common electrode layer disposed on the liquid crystal layer;
the COA substrate comprises a substrate, a thin film transistor and a color resistance layer, wherein the thin film transistor is arranged on the substrate, the color resistance layer is arranged on the thin film transistor and comprises a plurality of color resistors which are arranged in an overlapped mode, a first groove is formed in an overlapped area of the thin film transistor corresponding to the color resistance layer, and the color resistance layer is filled into the first groove.
CN201911026149.6A 2019-10-25 2019-10-25 COA substrate and display panel Active CN110806666B (en)

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