CN117471793A - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
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- CN117471793A CN117471793A CN202311295417.0A CN202311295417A CN117471793A CN 117471793 A CN117471793 A CN 117471793A CN 202311295417 A CN202311295417 A CN 202311295417A CN 117471793 A CN117471793 A CN 117471793A
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 137
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 54
- 230000008719 thickening Effects 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 22
- 238000005507 spraying Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000007641 inkjet printing Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 239000010408 film Substances 0.000 description 8
- 238000007639 printing Methods 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000003252 repetitive effect Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—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
- G02F1/13625—Patterning using multi-mask exposure
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The application discloses a display panel, a preparation method thereof and a display device, and aims to relieve uneven display. The embodiment of the application provides a display panel, the display panel includes: a plurality of first exposure areas and a repeated exposure area between adjacent first exposure areas; the display panel includes: an array substrate and an opposite substrate which are oppositely arranged, and a liquid crystal layer positioned between the array substrate and the opposite substrate; the array substrate and/or the opposite substrate comprises a plurality of thickening parts positioned in the repeated exposure area; the thickness of the liquid crystal layer of the area corresponding to the thickening part is smaller than that of the liquid crystal layer of the first exposure area.
Description
Technical Field
The application relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.
Background
Currently, one common method for photoalignment of liquid crystal display panels is ultraviolet vertical alignment (Ultra Violet Vertical Alignment, UV) 2 A) Technique, UV 2 The technology A adopts ultraviolet light with a certain angle to carry out scanning alignment through a mask plate so as to irradiate the photo-alignment film layer, and the photo-alignment film layer carries out alignment reaction so as to lead liquid crystal molecules to be arranged at a certain included angle. However, UV 2 The size of the mask used in the technology A is smaller than the size of the liquid crystal display panel, so that a plurality of masks are needed to be spliced. In consideration of the light source irradiation range and the mask size, it is generally necessary to provide a repetitive exposure region, however, the region corresponding to the repetitive exposure region has a case of bright display brightness due to the repetitive exposure, so that the display panel has a display non-uniformity phenomenon.
Disclosure of Invention
The embodiment of the application provides a display panel, a preparation method thereof and a display device, which are used for relieving uneven display.
The embodiment of the application provides a display panel, the display panel includes: a plurality of first exposure areas and a repeated exposure area between adjacent first exposure areas; the display panel includes: an array substrate and an opposite substrate which are oppositely arranged, and a liquid crystal layer positioned between the array substrate and the opposite substrate;
the array substrate and/or the opposite substrate comprises a plurality of thickening parts positioned in the repeated exposure area;
the thickness of the liquid crystal layer of the area corresponding to the thickening part is smaller than that of the liquid crystal layer of the first exposure area.
In some embodiments, the array substrate and the counter substrate each include an alignment layer;
the alignment layer of the array substrate and/or the alignment layer of the opposite substrate comprises: a thickened portion and a first portion located in the first exposure region; the thickness of the thickened portion is greater than the thickness of the first portion.
In some embodiments, the first exposure regions and the repeating exposure regions each extend along a first direction, the first exposure regions and the repeating exposure regions being alternately arranged in a second direction; the first direction intersects the second direction;
the width of the display panel in the first direction is smaller than the width of the display panel in the second direction.
In some embodiments, the alignment layer of the array substrate and the alignment layer of the opposite substrate, wherein the optical alignment scanning direction of one alignment layer is a first direction and the optical alignment scanning direction of the other alignment layer is a second direction;
the alignment layer with the optical alignment scanning direction being the second direction comprises a thickening part.
In some embodiments, the array substrate or the counter substrate includes a first transparent electrode;
in the repeated exposure region, the first transparent electrode includes: the first transparent sub-electrode and the thickening part are positioned on one side of the first transparent sub-electrode, which is close to the liquid crystal layer.
In some embodiments, the display panel includes a plurality of subpixels arranged in an array;
the repeated exposure area comprises a plurality of sub-pixels arranged in an array along a first direction and a second direction.
The preparation method of the display panel provided by the embodiment of the application comprises the following steps:
manufacturing an array substrate and an opposite substrate; the array substrate and/or the opposite substrate comprises a plurality of thickening parts;
performing an optical alignment process on the array substrate and/or the opposite substrate to form a plurality of first exposure areas and repeated exposure areas positioned between adjacent first exposure areas; the thickened part is positioned in the repeated exposure area;
forming a liquid crystal layer between the array substrate and the opposite substrate; the thickness of the liquid crystal layer of the area corresponding to the thickening part is smaller than that of the liquid crystal layer of the first exposure area.
In some embodiments, fabricating the array substrate and the counter substrate each includes a step of fabricating an alignment layer;
manufacturing an alignment layer of an array substrate and/or manufacturing an alignment layer of a counter substrate, specifically including:
spraying the material of the alignment layer on the first exposure area and the repeated exposure area by adopting an ink-jet printing process; the spraying amount of the first exposure area is smaller than that of the repeated exposure area.
In some embodiments, the fabrication of the array substrate or the fabrication of the opposite substrate specifically includes:
forming a pattern of first transparent sub-electrodes;
and forming a pattern of thickening parts on one side of the first transparent sub-electrode facing the liquid crystal layer.
The embodiment of the application provides a display device, the display device includes: the embodiment of the application provides a display panel.
According to the display panel, the preparation method thereof and the display device, the transmittance of the repeated exposure area can be reduced by arranging the thickening part in the repeated exposure area, so that the condition that the repeated exposure area has bright display brightness is avoided, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;
FIG. 2 is a cross-sectional view taken along the line CC' of FIG. 1 provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
FIG. 4 is a cross-sectional view taken along DD' in FIG. 3 according to an embodiment of the present application;
FIG. 5 is a schematic diagram showing the effect of molecular chains of an alignment layer material on the pretilt angle of liquid crystal molecules according to the embodiment of the present application;
FIG. 6 is a schematic illustration of an inkjet printing according to an embodiment of the present application;
fig. 7 is a schematic diagram of an alignment layer film according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present disclosure;
fig. 13 is a schematic flow chart of a method for manufacturing a display panel according to an embodiment of the present application;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application. And embodiments and features of embodiments in this application may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments.
Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the dimensions and shapes of the various figures in the drawings do not reflect true proportions, and are intended to illustrate the present application only. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
The embodiment of the application provides a display panel, as shown in fig. 1 and 3, the display panel includes: a plurality of first exposure areas 1 and a repetitive exposure area 2 located between adjacent first exposure areas 1;
as shown in fig. 2 and 4, the display panel includes: an array substrate 3 and a counter substrate 4 disposed opposite to each other, and a liquid crystal layer 5 between the array substrate 3 and the counter substrate 4;
the array substrate 3 and/or the counter substrate 4 includes a plurality of thickened portions 6 located in the repeated exposure region 2;
the thickness of the liquid crystal layer 5 in the region corresponding to the thickened portion 6 is smaller than the thickness of the liquid crystal layer 5 in the first exposure region 1.
It should be noted that, the display panel provided in the embodiment of the present application is a liquid crystal display panel, and the photoalignment process needs to be performed to enable the liquid crystal in the liquid crystal layer to have a desired pretilt angle. The optical alignment process needs to use a plurality of spliced mask plates, repeated exposure is carried out at the spliced position, and single exposure is carried out at the non-spliced position; the first exposure area is the area with single exposure, and the repeated exposure area is the area with repeated exposure.
Transmittance of the liquid crystal display panel Wherein θ is an included angle between a polarizer located at the light incident side of the liquid crystal display panel and a polarizing axis of a polarizer located at the light emergent side; alpha is the included angle between the polarizing axis of the polarizer on the light incident side of the liquid crystal display panel and the long axis of the liquid crystal, namely the pretilt angle; lambda is the wavelength of light; Δn is the optical refractive index of the liquid crystal, and d is the thickness of the liquid crystal layer. Thus, decreasing d may decrease Tr.
According to the display panel provided by the embodiment of the application, the transmittance of the repeated exposure area can be reduced by setting the thickening part in the repeated exposure area, so that the condition that the repeated exposure area has the bright display brightness is avoided, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
Fig. 2 is a sectional view taken along CC 'in fig. 1, and fig. 4 is a sectional view taken along DD' in fig. 3.
In some embodiments, as shown in fig. 2 and 4, the array substrate 3 and the opposite substrate 4 each include an alignment layer 7.
In some embodiments, as shown in fig. 2 and 4, the array substrate 3 includes an alignment layer 7 that is a first alignment layer 7-1, and the array substrate 3 further includes a first substrate 10, where the first alignment layer 7-1 is located on a side of the first substrate 10 facing the liquid crystal layer 5; the counter substrate 4 includes an alignment layer 7 as a second alignment layer 7-2, and the counter substrate 4 further includes a second substrate 11, where the second alignment layer 7-2 is located on a side of the second substrate 11 facing the liquid crystal layer 5.
In some embodiments, as shown in fig. 2 and 4, the display panel includes a plurality of sub-pixels 9 arranged in an array in a first direction A1 and a second direction (not shown); the counter substrate 4 further includes: a black matrix 12 and a color resist 13 between the second substrate 11 and the second alignment layer 7-2; the black matrix 12 has an opening region, which is a sub-pixel opening region 901; the color resist 13 is located in the opening area. For example, the subpixels include red subpixels, blue subpixels, and green subpixels. Correspondingly, the color resistances include a red resistance corresponding to the red sub-pixel, a blue resistance corresponding to the blue sub-pixel, and a green resistance corresponding to the green sub-pixel.
In some embodiments, as shown in fig. 2 and 4, the repeated exposure region 2 includes a plurality of sub-pixels 9 arrayed in a first direction A1 and a second direction (not shown). I.e. the repeated exposure area 2 covers a plurality of sub-pixels 9.
In some embodiments, the array substrate further includes: a thin film transistor between the first substrate base and the first alignment layer 7-1, and a pixel electrode between the thin film transistor and the first alignment layer. Each sub-pixel includes a thin film transistor and a pixel electrode.
In some embodiments, as shown in fig. 2 and 4, the alignment layer 7 of the array substrate 3 and/or the alignment layer 7 of the opposite substrate 4 includes: thickened portion 6 and first portion 701 located in first exposure field 1; the thickness of the thickened portion 6 is greater than the thickness of the first portion 701.
It should be noted that, in the display panel provided by this embodiment of the present application, the alignment layer includes a thickening portion, not only can reduce the thickness of the liquid crystal layer in the area where the thickening portion is provided to reduce Tr, as shown in fig. 5, when the alignment layer thickness increases, the molecular chain of the material (for example, polyimide) in the alignment layer increases, the acting force acting on the liquid crystal molecules in the liquid crystal layer increases, and the pretilt angle of the liquid crystal molecules increases, so that Tr can be further reduced, the situation that the display brightness is brighter in the repeated exposure area is further alleviated, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
In fig. 2, the alignment layer 7 of the array substrate 3, i.e., the first alignment layer 7-1, includes: the thickened portion 6 and the first portion 701 do not include the thickened portion 6 in the alignment layer 7 of the counter substrate 4, i.e., the second alignment layer 7-2. In fig. 4, the alignment layer 7 of the array substrate 3, i.e., the first alignment layer 7-1, does not include the thickened portion 6, and the alignment layer 7 of the opposite substrate 4, i.e., the second alignment layer 7-2, includes the thickened portion 6 and the first portion 701. The pretilt angle of the liquid crystal molecules can be increased by changing the thickness of the alignment layer on one side of the array substrate or the opposite substrate in the repeated exposure area.
Of course, in the implementation, the first alignment layer and the second alignment layer may each include a thickened portion and a first portion, as required.
In some embodiments, as shown in fig. 1 and 3, the first exposure areas 1 and the repeated exposure areas 2 extend along a first direction A1, and the first exposure areas 1 and the repeated exposure areas 2 are alternately arranged in a second direction A2; the first direction A1 intersects the second direction A2;
the width H1 of the display panel in the first direction A1 is smaller than the width H2 of the display panel in the second direction A2.
That is, the repeated exposure area and the first exposure area are arranged along the long side direction of the display panel.
In fig. 1 and 3, the first direction A1 is perpendicular to the second direction A2. In fig. 1, a first direction A1 is a horizontal direction, and a second direction A2 is a vertical direction. In fig. 3, the first direction A1 is a vertical direction, and the second direction A2 is a horizontal direction.
It should be noted that the photoalignment process is performed on the liquid crystal display panel, that is, the photoalignment process is performed on the alignment layer. In a specific implementation, the alignment layer on one side of the array substrate and the opposite substrate may be subjected to a photo-alignment process, i.e., a single-side exposure. The alignment layers of the array substrate and the opposite substrate may be subjected to a photo-alignment process, i.e., double-sided exposure. For double-sided exposure, the scanning directions in the photo-alignment processes of the array substrate and the opposite substrate are different, for example, the photo-alignment scanning direction of one side is parallel to the first direction, the repeated exposure regions of the one side extend along the first direction, the first exposure regions and the repeated exposure regions are alternately arranged in the second direction, the photo-alignment scanning direction of the other side is parallel to the second direction, the repeated exposure regions of the one side extend along the second direction, and the first exposure regions and the repeated exposure regions are alternately arranged in the first direction. The first exposure region 1 and the repeated exposure region 2 shown in fig. 1 and 3 are a single exposure region and a repeated exposure region for exposing one side of the array substrate and the opposite substrate, respectively.
In some embodiments, as shown in fig. 2 and 4, in the alignment layer 7 of the array substrate 3 and the alignment layer 7 of the opposite substrate 4, the photo-alignment scanning direction of one alignment layer 7 is a first direction A1, and the photo-alignment scanning direction of the other alignment layer 7 is a second direction A2;
the alignment layer 7 having the photoalignment scanning direction being the second direction A1 comprises a thickening 6.
It should be noted that, the alignment layer is generally manufactured by a printing process, and the ink including the alignment layer material is manufactured, as shown in fig. 6, and the ink 17 is sprayed onto the substrate 15 to be manufactured by using a whole row of printing nozzles 16. And a row of heads 16 is moved or a substrate 15 is moved, and droplets 14 of high density are formed on the substrate 15. As shown in fig. 7, these high-density droplets 14 are spread by the surface tension and then connected to form the alignment layer 7. In particular, the spraying amounts of the plurality of spray heads used in the printing process can be independently controlled, for example, the working voltage of the equipment can be increased to increase the spraying amount of the spray heads, so that the different alignment layer thicknesses of different areas can be controlled by adjusting the different printing spraying amounts, and the spraying amount of the spray heads corresponding to the repeated exposure areas in a whole row of printing spray heads is larger than the spraying amount of the other spray heads. Thus, as shown in fig. 7, the volume of the droplet 14 corresponding to the repetitive exposure region 2 is larger than the volume of the droplet 14 corresponding to the first exposure region 1, and after film formation diffusion, the thickness of the region alignment layer 7 with a large spray amount is larger than the thickness of the region alignment layer 7 with a small spray amount. And the spraying precision is 0.99 micrometers, the diffusion precision is 80 micrometers when the film is formed, and the diffusion precision is smaller than the width of 1 sub-pixel, so that the adjustment of the spraying quantity has no influence on the macroscopic display effect. However, due to process limitations, the moving direction of the printing heads of a whole row or the moving direction of the substrate is the extending direction of the short sides of the display panel, i.e. the second direction. Therefore, when the extending direction of the repeated exposure area, that is, the photoalignment scanning direction corresponding to the repeated exposure area is the second direction, the thickness of the alignment layer can be increased in the repeated exposure area through the printing process.
In some embodiments, as shown in fig. 1, when the first direction A1 is a horizontal direction and the second direction A2 is a vertical direction, the photo-alignment scanning direction of the array substrate is the second direction A2, the photo-alignment scanning direction of the opposite substrate is the first direction A1, and the first exposure area 1 and the repeated exposure area 2 are a single exposure area and a repeated exposure area of the photo-alignment process of the array substrate, respectively. The thickness of the first alignment layer in the repeated exposure area can be increased by adjusting the spraying amount. That is, as shown in fig. 2, the first alignment layer 7-1 may include the thickened portion 6 in the repeated exposure region 2 and the first portion 701 in the first exposure region 1 by adjusting the spray amounts of the different spray heads. While the thickness of the second alignment layer 7-2 is the same in different areas.
Alternatively, in some embodiments, as shown in fig. 3, when the first direction A1 is a vertical direction and the second direction A2 is a horizontal direction, the photo-alignment scanning direction of the opposite substrate is the second direction A2, the photo-alignment scanning direction of the array substrate is the first direction A1, and the first exposure region 1 and the repeated exposure region 2 are a single exposure region and a repeated exposure region of the photo-alignment process of the opposite substrate, respectively. The thickness of the second alignment layer in the repeated exposure area can be increased by adjusting the spraying amount. That is, as shown in fig. 4, the spraying amount of the different spray heads may be adjusted so that the first alignment layer 7-2 includes the thickened portion 6 in the repeated exposure area 2 and includes the first portion 701 in the first exposure area 1. While the thickness of the first alignment layer 7-1 is the same in different areas.
In the embodiment, taking the display panel shown in fig. 1 as an example, if the width H2 of the display panel in the first direction A1 is 50 inches and the width of the sub-pixel is 285.376 micrometers, the width H3 of the repeated exposure area 2 in the first direction A1 is about 20 millimeters, and the repeated exposure area 2 actually covers 210 sub-pixels 9 in the first direction A1; the width H4 of the first exposure field 1 between the two repeated exposure fields 2 is about 230 mm.
In a specific implementation, in the alignment layer including the thickening portion, the thickness of the thickening portion is 1280 angstroms, for example, and the thickness of the first portion is 1150 angstroms, for example. Experiments prove that when the display panel with the first alignment layer comprising the thickened part and the second alignment layer not comprising the thickened part is tested, when the thickness of the thickened part of the first alignment layer is 1280 angstroms and the thickness of the first part is 1150 angstroms, compared with the case that the thickness of the first alignment layer is 1150 angstroms, the brightness of the repeated exposure area is obviously reduced, and the problem of poor brightness uniformity of the display panel is improved. In practice, the thickness of the thickened portion, the first portion, may be determined according to the desired brightness uniformity requirements.
Of course, in practice, the thickening can also be provided in other ways.
In some embodiments, as shown in fig. 8 and 9, the array substrate 3 or the opposite substrate 4 includes a first transparent electrode 8;
in the repeated exposure region 2, the first transparent electrode 8 includes: the first transparent sub-electrode 801 and the thickened portion 6 on the side of the first transparent sub-electrode 801 close to the liquid crystal layer 5.
The display panel that this embodiment provided, first transparent electrode include the bodiness in the repeated exposure district to can reduce the thickness of repeated exposure district liquid crystal layer, and then reduce the transmissivity in repeated exposure district, thereby avoid the repeated exposure district to have the condition that display brightness is bright partially, can improve display panel's demonstration homogeneity, promote display effect and user experience.
In fig. 8, the counter substrate 4 includes a first transparent electrode 8. The array substrate 3 in fig. 9 includes a first transparent electrode 8.
In a specific implementation, when the array substrate includes a first transparent electrode, the first transparent electrode is located between the pixel electrode and the first alignment layer, for example. Alternatively, the first electrode is located between the thin film transistor and the pixel electrode.
In a specific implementation, the first transparent electrode is, for example, a common electrode. The first transparent sub-electrode is arranged on the whole surface, and then a pattern of thickened parts is formed in the repeated exposure area.
In a specific implementation, the first transparent sub-electrode and the thickening portion each comprise a transparent material. For example, the first transparent sub-electrode and the thickened portion are made of the same material and are all made of indium tin oxide.
In some embodiments, when the first exposure area and the repeated exposure area are as shown in fig. 1 or fig. 3, as shown in fig. 10 and fig. 11, the pattern of the thickened portion 6 projected perpendicularly to the array substrate 3 is a stripe shape extending along the second direction A2, and the plurality of thickened portions 6 are aligned along the first direction A1.
In some embodiments, the first transparent sub-electrode has a thickness of 1200 angstroms and the thickened portion has a thickness of about 100 angstroms. In practical implementation, experiments prove that when the thickness of the first transparent sub-electrode is 1200 angstroms and the total thickness of the first transparent electrode in the area where the thickening part is located is 1300 angstroms, compared with the case that the thicknesses of the first transparent electrode are 1200 angstroms, the brightness of the repeated exposure area is obviously reduced, and the problem of poor brightness uniformity of the display panel is improved. In practice, the thickness of the thickened portion, the first transparent sub-electrode, may be determined according to the desired brightness uniformity requirements.
In the embodiment, as shown in fig. 12, the first exposure area 1 is arranged in an array along the first direction A1 and the second direction A2, the pattern of the repeated exposure area 2 is in a grid shape, the repeated exposure area 2 includes a first repeated exposure area 201 and a second repeated exposure area 202, the first repeated exposure area 201 is a repeated exposure area of the array substrate for performing the optical alignment process, the second repeated exposure area 202 is a repeated exposure area of the opposite substrate for performing the optical alignment process, and the first exposure area 1 is an area of the array substrate and the opposite substrate which are not subjected to repeated exposure after being oppositely arranged. As shown in fig. 12, the pattern of the thickened portions 6 may be arranged in a grid shape.
In fig. 2, 4, 8, and 9, only the alignment layer 7 includes the thickened portion 6 or only the first transparent electrode 8 includes the thickened portion 6. The position of the thickened portion can be selected as needed under the condition that the uneven brightness can be relieved only by arranging the thickened portion on one film layer. Of course, in the implementation, a thickening may be provided on both the alignment layer and the first transparent electrode.
Based on the same inventive concept, the embodiment of the present application further provides a method for manufacturing a display panel, as shown in fig. 13, including:
s101, manufacturing an array substrate and a counter substrate; the array substrate and/or the opposite substrate comprises a plurality of thickening parts;
s102, performing an optical alignment process on the array substrate and/or the opposite substrate to form a plurality of first exposure areas and repeated exposure areas between adjacent first exposure areas; the thickened part is positioned in the repeated exposure area;
s103, forming a liquid crystal layer between the array substrate and the opposite substrate; the thickness of the liquid crystal layer of the area corresponding to the thickening part is smaller than that of the liquid crystal layer of the first exposure area.
According to the preparation method of the display panel, the thickening part is arranged in the repeated exposure area, so that the transmittance of the repeated exposure area can be reduced, the condition that the display brightness is bright in the repeated exposure area is avoided, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
In some embodiments, fabricating the array substrate and the counter substrate each includes a step of fabricating an alignment layer;
manufacturing an alignment layer of an array substrate and/or manufacturing an alignment layer of a counter substrate, specifically including:
spraying the material of the alignment layer on the first exposure area and the repeated exposure area by adopting an ink-jet printing process; the spraying amount of the first exposure area is smaller than that of the repeated exposure area.
In a specific implementation, when the width of the display panel in the first direction is smaller than the width of the display panel in the second direction, and the photoalignment scanning direction of the photoalignment process corresponding to the alignment layer is the second direction, the manufacturing the alignment layer specifically includes:
and controlling the spray head for ink-jet printing or the substrate to be sprayed with the alignment layer material to move along the second direction, and enabling the spraying amount of the spray head corresponding to the first exposure area to be smaller than the spraying amount of the spray head corresponding to the repeated exposure area, so that the alignment layer material is sprayed on the substrate to form high-density liquid drops.
According to the preparation method of the display panel, the alignment layer thicknesses of different areas are controlled to be different by adjusting the different printing spraying amounts, so that the thickness of the alignment layer in the repeated exposure area is larger than that of the first exposure area. The molecular chains of the alignment layer at the thickening part are increased, the acting force acting on liquid crystal molecules in the liquid crystal layer is increased, and the pretilt angle of the liquid crystal molecules is increased, so that Tr can be further reduced, the condition that the display brightness is bright in a repeated exposure area is further relieved, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
In practice, for example, the ink jet printing apparatus operating voltage may be increased to increase the amount of ink sprayed from the ink jet head. The specific arrangement manner of the alignment layer including the thickening portion is referred to the embodiment of the display panel provided in the present application, and is not described herein again.
In some embodiments, the fabrication of the array substrate or the fabrication of the opposite substrate specifically includes:
forming a pattern of first transparent sub-electrodes;
and forming a pattern of thickening parts on one side of the first transparent sub-electrode facing the liquid crystal layer.
According to the preparation method of the display panel, the thickening part is formed at the repeated exposure area and at one side of the first transparent sub-electrode, which faces the liquid crystal layer, so that the thickness of the liquid crystal layer in the repeated exposure area can be reduced, the transmittance of the repeated exposure area is reduced, the condition that the display brightness is bright in the repeated exposure area is avoided, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
The specific arrangement manner of the first transparent sub-electrode and the thickening portion is referred to the embodiment of the display panel provided in the present application, and is not described herein again.
Based on the same inventive concept, the embodiments of the present application also provide a display device, as shown in fig. 14, including: the embodiment of the application provides a display panel 19.
In some embodiments, in the display device provided in the embodiments of the present disclosure, as shown in fig. 14, a backlight module 18 located on the light incident side of the array substrate 3 may be further included. The backlight module can be a direct type backlight module or a side-in type backlight module.
In a specific implementation, the side-entry backlight module may include a light bar, a reflective sheet, a light guide plate, a diffusion sheet, a prism group, and the like, where the light bar is located at one side of the light guide plate in the thickness direction of the light guide plate. The direct type backlight module can comprise a matrix light source, a reflecting sheet, a diffusion plate, a brightness enhancement film and the like, wherein the reflecting sheet, the diffusion plate, the brightness enhancement film and the like are arranged on the light emitting side of the matrix light source in a stacked mode, and the reflecting sheet comprises an opening which is opposite to the position of each lamp bead in the matrix light source. The beads in the light bar, the beads in the matrix light source may be Light Emitting Diodes (LEDs), such as Micro light emitting diodes (Mini LEDs, micro LEDs, etc.). Micro light emitting diodes of the sub-millimeter order and even of the micrometer order are self-luminous devices as are Organic Light Emitting Diodes (OLEDs). As with organic light emitting diodes, it has a series of advantages of high brightness, ultra low delay, ultra large viewing angle, etc. And because the inorganic light-emitting diode emits light based on a metal semiconductor with more stable property and lower resistance, compared with the organic light-emitting diode which emits light based on an organic substance, the inorganic light-emitting diode has the advantages of lower power consumption, higher high temperature and low temperature resistance and longer service life. And when the miniature light-emitting diode is used as a backlight source, a more precise dynamic backlight effect can be realized, the glare phenomenon caused between the bright and dark areas of the screen by the traditional dynamic backlight can be solved while the brightness and the contrast of the screen are effectively improved, and the visual experience is optimized.
The display device provided by the embodiment of the application is as follows: any product or component with display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are those of ordinary skill in the art, and will not be described in detail herein, nor should they be considered as limiting the application. The implementation of the display device can be referred to the embodiment of the display panel, and the repetition is not repeated.
In summary, according to the display panel, the manufacturing method thereof and the display device provided by the embodiment of the application, the transmittance of the repeated exposure area can be reduced by arranging the thickening part in the repeated exposure area, so that the condition that the display brightness is brighter in the repeated exposure area is avoided, the display uniformity of the display panel can be improved, and the display effect and the user experience are improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (10)
1. A display panel, the display panel comprising: a plurality of first exposure areas and a repeated exposure area between adjacent first exposure areas; the display panel includes: an array substrate and an opposite substrate which are oppositely arranged, and a liquid crystal layer positioned between the array substrate and the opposite substrate;
the array substrate and/or the opposite substrate comprises a plurality of thickening parts positioned in the repeated exposure area;
the thickness of the liquid crystal layer of the area corresponding to the thickening part is smaller than that of the liquid crystal layer of the first exposure area.
2. The display panel of claim 1, wherein the array substrate and the counter substrate each comprise an alignment layer;
the alignment layer of the array substrate and/or the alignment layer of the opposite substrate includes: the thickened portion and a first portion located in the first exposure area; the thickness of the thickened portion is greater than the thickness of the first portion.
3. The display panel of claim 2, wherein the first exposure areas and the repeated exposure areas each extend in a first direction, the first exposure areas and the repeated exposure areas being alternately arranged in a second direction; the first direction intersects the second direction;
the width of the display panel in the first direction is smaller than the width of the display panel in the second direction.
4. The display panel according to claim 3, wherein one of the alignment layers of the array substrate and the alignment layer of the opposite substrate has a photoalignment scanning direction of the first direction and the other of the alignment layers has a photoalignment scanning direction of the second direction;
the alignment layer having a photoalignment scanning direction being the second direction comprises the thickening.
5. The display panel according to any one of claims 1 to 4, wherein the array substrate or the counter substrate includes a first transparent electrode;
in the repeated exposure region, the first transparent electrode includes: the first transparent sub-electrode is positioned at the thickened part of one side of the first transparent sub-electrode, which is close to the liquid crystal layer.
6. The display panel according to any one of claims 1 to 4, wherein the display panel comprises a plurality of sub-pixels arranged in an array;
the repeated exposure area comprises a plurality of sub-pixels which are arrayed along a first direction and a second direction.
7. A method for manufacturing a display panel, the method comprising:
manufacturing an array substrate and an opposite substrate; the array substrate and/or the opposite substrate comprises a plurality of thickening parts;
performing an optical alignment process on the array substrate and/or the opposite substrate to form a plurality of first exposure areas and repeated exposure areas positioned between adjacent first exposure areas; the thickening part is positioned in the repeated exposure area;
forming a liquid crystal layer between the array substrate and the opposite substrate; the thickness of the liquid crystal layer of the area corresponding to the thickening part is smaller than that of the liquid crystal layer of the first exposure area.
8. The method of claim 7, wherein fabricating the array substrate and the counter substrate each includes fabricating an alignment layer;
the manufacturing of the alignment layer of the array substrate and/or the manufacturing of the alignment layer of the opposite substrate specifically includes:
spraying a material of an alignment layer on the first exposure area and the repeated exposure area by adopting an ink-jet printing process; the spraying amount of the first exposure area is smaller than that of the repeated exposure area.
9. The method according to claim 7 or 8, wherein fabricating the array substrate or fabricating the counter substrate, comprises:
forming a pattern of first transparent sub-electrodes;
and forming a pattern of the thickening part on one side of the first transparent sub-electrode facing the liquid crystal layer.
10. A display device, characterized in that the display device comprises: the display panel according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311295417.0A CN117471793A (en) | 2023-10-08 | 2023-10-08 | Display panel, preparation method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311295417.0A CN117471793A (en) | 2023-10-08 | 2023-10-08 | Display panel, preparation method thereof and display device |
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| Publication Number | Publication Date |
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| CN117471793A true CN117471793A (en) | 2024-01-30 |
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| CN202311295417.0A Pending CN117471793A (en) | 2023-10-08 | 2023-10-08 | Display panel, preparation method thereof and display device |
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| Country | Link |
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| CN (1) | CN117471793A (en) |
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- 2023-10-08 CN CN202311295417.0A patent/CN117471793A/en active Pending
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