阅读说明：本技术 显示面板及其制作方法、显示装置 (Display panel, manufacturing method thereof and display device ) 是由 王海宏 孙语琳 于 2021-09-10 设计创作，主要内容包括：本发明公开一种显示面板及其制作方法、显示装置,显示面板包括相对设置的阵列基板和彩膜基板,以及位于阵列基板与彩膜基板之间的液晶层,阵列基板包括阵列基底以及设于阵列基底上的多条平行的数据线,阵列基底上形成有显示区和围绕显示区的周边区,数据线从显示区延伸至周边区,周边区包括设有修复线的修复区,每条修复线对应多条数据线,每条数据线在阵列基底上的正投影与该数据线对应的修复线在阵列基底上的正投影具有两个交叠区域；阵列基板包括与液晶层贴合设置的第一配向膜,第一配向膜包括第一部分和除第一部分之外的第二部分,第一部分的厚度大于第二部分的厚度,第一部分在阵列基底上的正投影与修复区在阵列基底上的正投影重合。(The invention discloses a display panel, a manufacturing method thereof and a display device, wherein the display panel comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are oppositely arranged, the liquid crystal layer is positioned between the array substrate and the color film substrate, the array substrate comprises an array substrate and a plurality of parallel data lines arranged on the array substrate, a display area and a peripheral area surrounding the display area are formed on the array substrate, the data lines extend from the display area to the peripheral area, the peripheral area comprises a repair area provided with repair lines, each repair line corresponds to a plurality of data lines, and the orthographic projection of each data line on the array substrate and the orthographic projection of the repair line corresponding to the data line on the array substrate have two overlapping areas; the array substrate comprises a first alignment film which is attached to the liquid crystal layer, the first alignment film comprises a first part and a second part except the first part, the thickness of the first part is larger than that of the second part, and the orthographic projection of the first part on the array substrate is coincided with the orthographic projection of the repair area on the array substrate.)

1. A display panel comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are arranged oppositely, and the liquid crystal layer is positioned between the array substrate and the color film substrate;

the array substrate comprises a first alignment film attached to the liquid crystal layer, the first alignment film comprises a first portion and a second portion except the first portion, the thickness of the first portion is larger than that of the second portion, and the orthographic projection of the first portion on the array substrate coincides with the orthographic projection of the repair area on the array substrate.

2. The display panel according to claim 1, wherein the thickness of the first portion is 0.1 μm to 0.3 μm.

3. The display panel according to claim 1, wherein the thickness of the second portion is 0.05 μm to 0.15 μm.

4. The display panel according to claim 1, wherein a second alignment film is disposed between the color filter substrate and the liquid crystal layer, and the first alignment film and the second alignment film are complementary in structure in a butt joint direction of the array substrate and the color filter substrate.

5. The display panel according to claim 4, wherein the relative dielectric constant of the first alignment film and the second alignment film is 2.5 to 4.0.

6. A display device comprising the display panel according to any one of claims 1 to 5.

7. A method for manufacturing a display panel, the method being used for manufacturing the liquid crystal panel according to any one of claims 1 to 5, the method comprising:

forming an array substrate including a first alignment film;

forming a color film substrate;

the array substrate and the color film substrate are subjected to box matching, and a liquid crystal layer is filled between the array substrate and the color film substrate; wherein the content of the first and second substances,

the array substrate comprises an array substrate and a plurality of data lines positioned on the array substrate, a display area and a peripheral area surrounding the display area are formed on the array substrate, the data lines extend from the display area to the peripheral area, the peripheral area comprises repair areas provided with repair lines, each repair line corresponds to a plurality of data lines, and the orthographic projection of each data line on the array substrate and the orthographic projection of the repair line corresponding to the data line on the array substrate have two overlapping areas;

the first alignment film is attached to the liquid crystal layer, the first alignment film comprises a first portion and a second portion except the first portion, the thickness of the first portion is larger than that of the second portion, and the orthographic projection of the first portion on the array substrate coincides with the orthographic projection of the repair area on the array substrate.

8. The method of claim 7, wherein the thickness of the first portion is 0.1 μm to 0.3 μm.

9. The method of claim 7, wherein the thickness of the second portion is 0.05 μm to 0.15 μm.

10. The method according to claim 7, wherein the color filter substrate includes a second alignment film, the second alignment film is attached to the liquid crystal layer, and the second alignment film and the first alignment film are complementary in structure in a direction in which the array substrate and the color filter substrate are butted.

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.

Background

A Thin Film Transistor-Liquid Crystal Display (TFT-LCD) is used as a flat panel Display device, and has the characteristics of small size, low power consumption, no radiation, relatively low manufacturing cost, and the like, so that the TFT-LCD is increasingly applied to the field of high-performance Display. The TFT-LCD manufacturing process comprises the steps of separately manufacturing an array substrate and a color film substrate, and then, oppositely packing the array substrate and the color film substrate and filling liquid crystal to form the liquid crystal panel. In the manufacturing process of the array substrate, a data line Open (Open) may occur, which may cause a reduction in yield of the array substrate, thereby affecting the quality of a display device using the substrate.

Fig. 1 and fig. 2 are schematic circuit diagrams of an array substrate before and after repairing in the prior art. In fig. 1, the array substrate is provided with a plurality of data lines 01 and gate lines 02 which are distributed in a crossed manner, a plurality of repair lines R0 are pre-arranged in a peripheral region of the array substrate, when an Open position 03 is located at the data line 01, a data signal is transmitted from the upper side of fig. 1 to the position 03 to be terminated, and a pixel unit below the Open position 03 cannot receive the data signal and cannot display the data signal. Referring to fig. 2, the repair line and the data line are connected together by laser welding at 04 and 05, and the data signal in fig. 2 can be transmitted from the repair line to the pixel unit below the Open 03, so that the pixel unit below the Open 03 can normally display. However, in laser welding, referring to fig. 3, due to unstable laser capability, the two metal lines to be welded and the common electrode 06 of the color film substrate are short-circuited, so that the repair yield is reduced, and the quality of the display device is affected.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a display panel, a method of manufacturing the same, and a display device.

In a first aspect, an embodiment of the present invention provides a display panel, including an array substrate and a color film substrate that are arranged opposite to each other, and a liquid crystal layer located between the array substrate and the color film substrate, where the array substrate includes an array substrate and a plurality of parallel data lines arranged on the array substrate, a display area and a peripheral area surrounding the display area are formed on the array substrate, the data lines extend from the display area to the peripheral area, the peripheral area includes repair areas provided with repair lines, each repair line corresponds to a plurality of data lines, and an orthographic projection of each data line on the array substrate and an orthographic projection of the repair line corresponding to the data line on the array substrate have two overlapping areas;

the array substrate comprises a first alignment film attached to the liquid crystal layer, the first alignment film comprises a first portion and a second portion except the first portion, the thickness of the first portion is larger than that of the second portion, and the orthographic projection of the first portion on the array substrate coincides with the orthographic projection of the repair area on the array substrate.

Optionally, the first portion has a thickness of 0.1 μm to 0.3 μm.

Optionally, the thickness of the second portion is 0.05 μm to 0.15 μm.

Optionally, a second alignment film is disposed between the color film substrate and the liquid crystal layer, and the first alignment film and the second alignment film are in complementary structures in a butting direction of the array substrate and the color film substrate.

Optionally, the relative dielectric constant of the first alignment film and the second alignment film is 2.5 to 4.0.

In a second aspect, an embodiment of the present invention provides a display device, including the display panel as described above.

In a third aspect, a method for manufacturing a display panel according to an embodiment of the present invention is used for manufacturing the liquid crystal panel, where the method includes:

forming an array substrate including a first alignment film;

forming a color film substrate;

the array substrate and the color film substrate are subjected to box matching, and a liquid crystal layer is filled between the array substrate and the color film substrate; wherein the content of the first and second substances,

the array substrate comprises an array substrate and a plurality of data lines positioned on the array substrate, a display area and a peripheral area surrounding the display area are formed on the array substrate, the data lines extend from the display area to the peripheral area, the peripheral area comprises repair areas provided with repair lines, each repair line corresponds to a plurality of data lines, and the orthographic projection of each data line on the array substrate and the orthographic projection of the repair line corresponding to the data line on the array substrate have two overlapping areas;

the first alignment film is attached to the liquid crystal layer, the first alignment film comprises a first portion and a second portion except the first portion, the thickness of the first portion is larger than that of the second portion, and the orthographic projection of the first portion on the array substrate coincides with the orthographic projection of the repair area on the array substrate.

Optionally, the first portion has a thickness of 0.1 μm to 0.3 μm.

Optionally, the thickness of the second portion is 0.05 μm to 0.15 μm.

Optionally, the color film substrate includes a second alignment film, the second alignment film is attached to the liquid crystal layer, and the second alignment film and the first alignment film are in a complementary structure in a butt joint direction of the array substrate and the color film substrate.

The technical scheme provided by the embodiment of the invention can have the following beneficial effects:

according to the display panel provided by the embodiment of the invention, the first alignment film is arranged in the array substrate, and when the repair line and the data line are welded by laser, the first part of the first alignment film effectively prevents the common electrode in the color film substrate from being short-circuited by melting, so that the repair yield of the display panel is improved; in addition, the arrangement of the first alignment film and the second alignment film in the color film substrate effectively reduces the capacitance between the repair line and the common electrode, and increases the signal transmission speed.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic circuit diagram of a prior art array substrate before repairing;

FIG. 2 is a schematic circuit diagram of a repaired array substrate in the prior art;

FIG. 3 is a schematic structural diagram of a display panel under abnormal laser welding repair in the prior art;

FIG. 4 is a schematic circuit diagram of a display panel according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a display panel repaired by laser welding according to an embodiment of the present invention;

fig. 6 is another schematic structural diagram of a display panel repaired by laser welding according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 4 and fig. 5, an embodiment of the invention provides a display panel, which includes an array substrate 10 and a color filter substrate 20 that are oppositely disposed, and a liquid crystal layer 30 located between the array substrate 10 and the color filter substrate 20, where the array substrate 10 includes an array substrate 11 and a plurality of parallel data lines 12 disposed on the array substrate 11, a display region 111 (i.e., a region within a dashed line frame P) and a peripheral region surrounding the display region 111 are formed on the array substrate 11, the data lines 12 extend from the display region 111 to the peripheral region, the peripheral region includes a repair region 112 (i.e., a region between the dashed line frame P and a dashed line frame Q) provided with repair lines 13, each repair line 13 corresponds to a plurality of data lines 12, and an orthographic projection of each data line 12 on the array substrate 11 and an orthographic projection of the repair line 13 corresponding to the data line 12 on the array substrate 11 have two overlapping regions;

the array substrate 10 includes a first alignment film 14 attached to the liquid crystal layer 30, the first alignment film 14 includes a first portion 141 and a second portion 142 excluding the first portion 141, a thickness of the first portion 141 is greater than a thickness of the second portion 142, and an orthographic projection of the first portion 141 on the array substrate 11 coincides with an orthographic projection of the repair region 112 on the array substrate 11.

The thickness of the first part 141 of the first alignment film 14 covering the repair line is greater than that of the second part 142 of the first alignment film 14 except the repair line, and when the repair line and the data line form a repair point by laser welding, the first part protects the common electrode 21 from being short-circuited by laser melting, so that the repair yield is improved.

In this embodiment, the array substrate 11 is further provided with a plurality of parallel gate lines 15, a plurality of data lines 12 and a plurality of gate lines 15 are distributed criss-cross to define a plurality of pixel regions, each data line 12 extends along a first direction (for example, a horizontal direction in fig. 4), and the plurality of data lines 12 are arranged in parallel along a second direction (for example, a vertical direction in fig. 4); each gate line 15 extends along the second direction, and a plurality of gate lines 15 are arranged in parallel along the first direction;

each pixel region is internally provided with a thin film transistor and a pixel electrode, the thin film transistor comprises an active layer, a gate insulating layer, a gate electrode, an interlayer insulating layer, a source drain electrode and a passivation layer which are sequentially stacked from the array substrate 11 to the first alignment film 14, the pixel electrode is arranged on one side of the passivation layer far away from the array substrate, the pixel electrode is connected with the drain electrode of the thin film transistor through a through hole of the passivation layer, and the first alignment film 14 covers the pixel electrode. Here, the thin film transistor is exemplified by a top gate structure, but the structure of the thin film transistor may be a bottom gate structure.

The repair line and the grid line are arranged on the same layer, and the data line and the source drain electrode are arranged on the same layer.

In this embodiment, the color film substrate 20 includes a color film substrate, an optical filter, a common electrode 21, and a second alignment film 22, which are sequentially stacked, and the second alignment film 22 is attached to the liquid crystal layer 30.

In the present embodiment, one or more repair lines are preset in the peripheral region of the array substrate 10 for repairing the data lines with open circuits. For example, two repairing lines are arranged in the peripheral area in fig. 4, which can be used for repairing two broken line points, when a certain data line is broken, a connection point is formed by laser welding the point a and the point B. The data lines and the repair lines are welded in a laser mode at the points A and B to form repair points, the thick first alignment film 14 is used for preventing the common electrode in the color film substrate from being melted, so that the two metal lines of the data lines and the repair lines are prevented from being short-circuited with the common electrode, and the repair yield of the liquid crystal display panel is effectively improved; the second alignment film 22 and the first alignment film 14 are complementary in structure in the butt joint direction of the array substrate 10 and the color film substrate 20, so that the liquid crystal molecules are deflected according to a predetermined direction and angle.

In some embodiments, the thickness of the first alignment film 14 is greater than 0.05 μm, which can effectively prevent the occurrence of a short circuit of the common electrode of the color film substrate caused by unstable laser intensity, ensure that the repaired circuit has no problems of open circuit, short circuit and the like, and effectively improve the repair yield of the display panel.

The thickness of the first portion 141 is 0.1-0.3 μm, so that a common electrode in the color film substrate is protected, and the repair yield is improved; the thickness of the second portion 142 is 0.05 μm to 0.15 μm. The second portion 142 covers the portion outside the repair area, the first alignment film 14 formed by the first portion 141 and the second portion 142 covers the side of the array substrate 10 facing the liquid crystal layer 30, the second alignment film 22 covers the side of the color film substrate 20 facing the liquid crystal layer 30, and the first alignment film and the second alignment film are matched to enable liquid crystal molecules of the liquid crystal layer to be regularly arranged in a certain direction.

Further, the relative dielectric constant of the first alignment film 14 and the second alignment film 22 is 2.5 to 4.0. The relative dielectric constant of the liquid crystal layer is between 7 and 15, the relative dielectric constant of the first alignment film and the second alignment film is between 2.5 and 4.0, and the parasitic capacitance between the repair line and the common electrode can be reduced by arranging the thicker first alignment film and the thicker second alignment film, so that the problem of signal delay of the repair line is effectively avoided.

When the repair line and the data line are welded by laser in fig. 5 to form a repair point, the repair line and the data line are just melted, so that the broken data line is repaired. In some embodiments, as shown in fig. 6, when the laser intensity is unstable, the first alignment film is damaged but not broken when the repair line and the data line are welded by laser, and the first alignment film forms a good barrier to the common electrode, so as to prevent the common electrode from melting and forming a short circuit with the repair point.

The embodiment of the invention provides a manufacturing method of a display panel, which is used for manufacturing the liquid crystal panel and comprises the following steps:

forming an array substrate 10, wherein the array substrate 10 comprises a first alignment film 14;

forming a color film substrate 20;

arranging a liquid crystal layer 30 between the array substrate 10 and the color film substrate 20, and pairing the array substrate 10 and the color film substrate 20; wherein the content of the first and second substances,

the array substrate 10 comprises an array substrate 11 and a plurality of data lines 12 positioned on the array substrate 11, a display area 111 and a peripheral area surrounding the display area 111 are formed on the array substrate 11, the data lines 12 extend from the display area 111 to the peripheral area, the peripheral area comprises a repair area 112 provided with repair lines 13, each repair line 13 corresponds to a plurality of data lines 12, and the orthographic projection of each data line 12 on the array substrate 11 and the orthographic projection of the repair line 13 corresponding to the data line 12 on the array substrate 11 have two overlapping areas;

the first alignment film is disposed adjacent to the liquid crystal layer, the first alignment film 14 includes a first portion 141 and a second portion 142 except the first portion 141, a thickness of the first portion 141 is greater than a thickness of the second portion 142, and an orthographic projection of the first portion 141 on the array substrate 11 coincides with an orthographic projection of the repair area 112 on the array substrate 11.

The repair area is covered by the thicker first part, and when the repair point is formed by the laser welding data line and the repair line, the first part effectively prevents the laser from damaging the common electrode in the color film substrate.

In the embodiment, when the array substrate is prepared, an alignment liquid is coated on one side of a pixel electrode of the array substrate, a first alignment film pattern is formed by printing through a first alignment plate, and a first alignment film is stably formed by curing.

The color film substrate further comprises a second alignment film, the second alignment film is attached to the liquid crystal layer, and the second alignment film and the first alignment film are in complementary structures in the butt joint direction of the array substrate and the color film substrate.

And coating alignment liquid on one side of a common electrode of the color film substrate when the color film substrate is prepared. And printing by using a second alignment plate to form a second alignment film pattern, and curing and stabilizing to form a second alignment film.

In this embodiment, the first alignment layer and the second alignment layer may be formed as required, and the first alignment layer and the second alignment layer may be provided appropriately.

In some embodiments, the thickness of the first portion 141 is 0.1 μm to 0.3 μm, so as to effectively form protection for a common electrode in a color filter substrate and improve the repair yield; and/or the thickness of the second portion 142 is 0.05 μm to 0.15 μm, so that the parasitic capacitance between the repair line and the common electrode is reduced while the repair yield is improved, and the speed of the repair line for transmitting signals is ensured.

The embodiment of the invention also provides a display device which comprises the display panel. The display device can be a product or a component with a display function, such as a mobile phone, a television, a computer, a display, a digital photo frame, a navigator and the like, and the comparison in the embodiment of the invention is not limited at all.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.

Further, the present invention employs the first, second, etc. to describe various information, but the information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the inventive concept. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.