CN114185196A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN114185196A
CN114185196A CN202111520279.2A CN202111520279A CN114185196A CN 114185196 A CN114185196 A CN 114185196A CN 202111520279 A CN202111520279 A CN 202111520279A CN 114185196 A CN114185196 A CN 114185196A
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China
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sub
layer
refractive layer
display panel
refractive
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CN202111520279.2A
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Chinese (zh)
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李艳
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TCL China Star Optoelectronics Technology Co Ltd
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TCL China Star Optoelectronics Technology Co Ltd
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Priority to CN202111520279.2A priority Critical patent/CN114185196A/en
Publication of CN114185196A publication Critical patent/CN114185196A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention provides a display panel and a display device. The display panel comprises a liquid crystal layer, a thin film transistor layer, a color filter, a polarizer and a refraction layer; the color filter is positioned on one side of the light emergent direction of the liquid crystal layer; the polaroid is positioned on one side of the light emergent direction of the color filter; the refraction layer is positioned on one side of the light-emitting direction of the polaroid and comprises a plurality of sub-refraction layers with different refractive indexes. The invention makes a plurality of refraction layers with different refractive indexes on the outer side of the color filter, and the different optical actions of the refraction layers adjust the output light carrying information to different observation points, thereby improving the defect that the visual angle of the display panel is smaller because the light received by the observation points only carries a certain liquid crystal state and the information is single to cause color cast of different observation points; on the other hand, because the multilayer film is used for adjusting the light-emitting angle, the adjustment can be completed in the prior manufacturing technology of the substrate, and a wide-viewing-angle film does not need to be additionally arranged, so that the aim of saving the cost can be achieved.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
With the pursuit of the quality of display pictures, the requirements for LCDs are particularly higher. As LCDs become larger and larger, and the audience for viewing the same television correspondingly increases, it is necessary to further expand the viewing angle of the LCD.
At present, the visual angle is expanded by algorithm processing or a wide-viewing-angle film is adopted for improvement; however, the algorithm processing has a limited effect of improving the viewing angle, and the improvement of the wide viewing angle film increases the cost.
Disclosure of Invention
Based on the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a display panel and a display device, which can improve the viewing angle range of the display panel.
In order to achieve the above object, the present invention provides, first, a display panel including:
a thin film transistor layer;
a liquid crystal layer;
the color filter is positioned on one side of the light emergent direction of the liquid crystal layer;
the polaroid is positioned on one side of the light emergent direction of the color filter;
and the refraction layer is positioned on one side of the light emitting direction of the polaroid and comprises a plurality of sub-refraction layers with different refractive indexes.
Optionally, the refractive layer includes at least a first sub-refractive layer and a second sub-refractive layer, and the first sub-refractive layer and the second sub-refractive layer are disposed on the polarizer in an interlaced manner.
Optionally, the first sub-refractive layer and the second sub-refractive layer each include protruding portions and recessed portions that are staggered with each other, the protruding portions of the first sub-refractive layer are located in the recessed portions of the second sub-refractive layer, and the protruding portions of the second sub-refractive layer are located in the recessed portions of the first sub-refractive layer.
Optionally, the convex portions of the first sub-refractive layer and the convex portions of the second sub-refractive layer are triangular prism structures.
Optionally, the cross section of the triangular prism structure is an isosceles triangle, and an apex angle of the isosceles triangle faces to the light exit direction of the polarizer.
Optionally, the vertex angle of the isosceles triangle ranges from 30 ° to 120 °, and both base angles of the isosceles triangle range from 30 ° to 75 °.
Optionally, the first sub-refractive layer and the second sub-refractive layer are both in a wave-shaped structure, a peak of the first sub-refractive layer is located in a trough of the second sub-refractive layer, and a peak of the second sub-refractive layer is located in a trough of the first sub-refractive layer.
Optionally, the first sub-refraction layer comprises a plurality of regular trapezoid structures, the second sub-refraction layer comprises a plurality of inverted trapezoid structures, and the inclined angle of the regular trapezoid structures is complementary to the inclined angle of the inverted trapezoid structures.
Optionally, the refractive layer is made of a transparent optical material, and the refractive index of the refractive layer is 1.2 to 1.8.
The invention also provides a display device comprising the display panel.
Compared with the prior art, the invention has the beneficial effects that: a display panel is provided, which comprises a thin film transistor layer, a liquid crystal layer, a color filter, a polarizer and a refraction layer; the color filter is positioned on one side of the light emergent direction of the liquid crystal layer; the polaroid is positioned on one side of the light emergent direction of the color filter; the refraction layer is positioned on one side of the light-emitting direction of the polaroid and comprises a plurality of sub-refraction layers with different refractive indexes. The invention makes the refraction layer of different refractive indexes in the color filter outside, reach the effect of the angle of light-out of the microscopic regulation, the different optical effects of multiple refraction layers, adjust the output light carrying information to different observation points, in this way, can improve because the light that the observation point receives only carries a certain liquid crystal state, the information is relatively single to make different observation points produce the color cast, thus cause the defect that the display panel visual angle is slightly small; on the other hand, because the multilayer film is used for adjusting the light-emitting angle, the adjustment can be completed in the prior manufacturing technology of the substrate, and a wide-viewing-angle film does not need to be additionally arranged, so that the aim of saving the cost can be achieved.
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 first cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of an observation angle of a display panel according to an embodiment of the invention
FIG. 3 is a first interface diagram of a refractive layer according to an embodiment of the present invention;
FIG. 4 is a second interface diagram of a refractive layer according to an embodiment of the present invention;
FIG. 5 is a third interface diagram of a refractive layer according to an embodiment of the present invention;
FIG. 6 is a fourth interface diagram of a refractive layer according to an embodiment of the present invention;
FIG. 7 is a cross-sectional 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. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of 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 thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The embodiment of the invention provides a display panel, as shown in fig. 1 and fig. 2, including a liquid crystal layer 11, a thin film transistor layer 12, a color filter 2, a polarizer 3, and a refraction layer 4; the color filter 2 is positioned on one side of the light emergent direction of the liquid crystal layer 11; the polaroid 3 is positioned on one side of the light emergent direction of the color filter 2; the refraction layer is positioned on one side of the light-emitting direction of the polarizer 3 and comprises a plurality of sub-refraction layers with different refractive indexes.
The invention can be used for an LCD (liquid crystal display) panel, a plurality of refraction layers with different refractive indexes are arranged on the outer side of a color filter 2 to achieve the effect of micro-adjusting the light-emitting angle, and the output light rays carrying information are adjusted to different observation points by the different refractive indexes of a plurality of refraction layers, so that the defect that the visual angle of the display panel is smaller because the light rays received by the observation points only carry a certain liquid crystal state and the different observation points generate color cast because the information is single can be improved; on the other hand, because the multilayer film is used for adjusting the light-emitting angle, the adjustment can be completed in the prior manufacturing technology of the substrate, and a wide-viewing-angle film does not need to be additionally arranged, so that the aim of saving the cost can be achieved.
In one embodiment, the thin film transistor layer is used to drive the rotation of the liquid crystal in the liquid crystal layer, and control the display of each pixel, and is an important component of the liquid crystal display panel. The color filter 2 includes a color filter, which is an optical filter for expressing colors, and can precisely select a small-range wavelength band light wave to be passed through, and reflect or absorb other undesired wavelength bands. The color filter comprises a black shading area and an RGB (red, green and blue) three-primary-color area. The RGB three-primary-color area comprises a red area, a green area and a blue area, each three areas form a pixel, one or more transmission light rays in the three areas are selected according to requirements to display the color of the area, and the three areas are mixed into corresponding colors.
In one embodiment, as shown in fig. 3, the refractive layer 4 at least includes a first sub-refractive layer 41 and a second sub-refractive layer 42, and the first sub-refractive layer 41 and the second sub-refractive layer 42 are alternately disposed on the polarizer 3. Because the refractive index of first sub-refraction layer 41 and second from refraction layer is different, consequently can produce the light of different light-emitting directions, because the light that carries information has passed through certain refraction processing before getting into the people's eye, can mix the light information of different liquid crystal forms to same observation point like this in certain extent, will improve the colour cast phenomenon like this to can promote the visual angle scope.
In one embodiment, each of the first and second sub-refractive layers 41 and 42 includes convex portions and concave portions that are staggered with each other, the convex portions of the first sub-refractive layer 41 are located in the concave portions of the second sub-refractive layer 42, and the convex portions of the second sub-refractive layer 42 are located in the concave portions of the first sub-refractive layer 41. With such a structure, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be tightly combined with each other, so that the whole refraction layer is relatively flat, and the light transmittance of the refraction layer is improved.
In one embodiment, the convex portions of the first sub-refractive layer 41 and the convex portions of the second sub-refractive layer 42 are triangular prism structures. Similar to the state where gears intermesh. Therefore, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be further combined tightly, so that the whole refraction layer is relatively flat, and the light transmittance of the refraction layer is improved.
In one embodiment, the cross section of the triangular prism structure is an isosceles triangle, and an apex angle of the isosceles triangle faces the light exit direction of the polarizer 3. Such a structure may make the combination of the first sub-refractive layer 41 and the second sub-refractive layer 42 more regular and more compact.
In one embodiment, the vertex angle of the isosceles triangle ranges from 30 ° to 120 °, and both base angles of the isosceles triangle range from 30 ° to 75 °. As shown in fig. 4, for example, when the top angle is 60 °, the bottom angle is also 60 °, so that the cross section of the triangular prism structure is a regular triangle, which further makes the combination of the first sub-refractive layer 41 and the second sub-refractive layer 42 more regular and more compact.
In an embodiment, as shown in fig. 5, the top angle may also be 90 °, the two bottom angles are 45 °, and the cross section of the triangular prism structure is an isosceles right triangle, so that the combination of the first sub-refractive layer 41 and the second sub-refractive layer 42 is further more regular and the structure is more compact.
In one embodiment, the first sub-refractive layers 41 and the second sub-refractive layers 42 are both in a wave-shaped structure, the peaks of the first sub-refractive layers 41 are located in the valleys of the second sub-refractive layers 42, and the peaks of the second sub-refractive layers 42 are located in the valleys of the first sub-refractive layers 41. Therefore, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be further combined tightly, so that the refraction layer is flat and smooth, and the light transmittance of the refraction layer is improved.
In one embodiment, as shown in fig. 6, the first sub-refractive layer 41 includes a plurality of regular trapezoid structures, and the second sub-refractive layer 42 includes a plurality of inverted trapezoid structures, and the inclined side tilt angles of the regular trapezoid structures are complementary to those of the inverted trapezoid structures. Therefore, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be further combined tightly, so that the refraction layer is flat and smooth, and the light transmittance of the refraction layer is improved.
The embodiment of the invention also provides a manufacturing method of the display panel, which can manufacture the display panel shown in fig. 7, and the method comprises the following steps:
firstly, providing a color filter glass plate, then attaching a polarizer on the color filter glass plate, then attaching a transparent refraction layer on the polarizer, then manufacturing an RGB color resistance layer below the color filter glass plate, and then arranging a liquid crystal layer, a black matrix and a TFT (thin film transistor) array below the RGB color resistance layer.
In the present application, the black matrix 13 is used to prevent color mixing between pixels or light leakage at the edge of the color filter substrate. The composition for manufacturing the black matrix 13 includes a light-shielding material, a resin, a polymer monomer, a photoinitiator, and a solvent; wherein the light-shielding material comprises mesoporous carbon.
Specifically, in the composition for the black matrix 13, the mass percentages of the components are as follows: 10-25% of resin, 2-8% of polymer monomer, 10-20% of shading material, 3-7% of photoinitiator and 56-65% of solvent. The black matrix 13 prepared using the composition for the black matrix 13 can achieve a good light-shielding effect.
Further, in an embodiment of the present application, in the composition for the black matrix 13, the mass percentages of the components are: 20% of resin, 5% of polymer monomer, 10% of light shielding material, 5% of photoinitiator and 60% of solvent. In the composition for the black matrix 13 provided in this embodiment, the solvent can sufficiently dissolve the light-shielding material, the resin, the polymer monomer, and the photoinitiator, and the mesoporous carbon can be uniformly dispersed in the resin, so that agglomeration is prevented, thereby blocking the transmission path of electrons.
Wherein the resin is used for maintaining the chemical and mechanical properties of the composition, and specifically can be one or more of phenolic resin, acrylic resin, polyvinyl alcohol cinnamate and siloxane resin.
The polymer monomer is a micromolecule containing a polymerizable functional group, is used for improving the crosslinking degree, improving the flexibility of a film layer, reducing the viscosity of resin and the like, can be a free radical type monomer or a cationic monomer, or a combination of the free radical and the cationic monomer, and specifically can be one or more combinations of acrylate monomers, vinyl ether monomers and epoxy monomers.
Among them, the photoinitiator is not particularly limited, and an existing material can be used as the photoinitiator. For example, one or a mixture of more than one of benzoin, benzophenone and anthraquinone photoinitiators.
The solvent may be propylene glycol methyl ether acetate, ethyl acetate, butyl acetate, 3-methoxybutyl acetate, or ethyl 3-ethoxypropionate, and can sufficiently dissolve the light-shielding material, the resin, the polymer monomer, and the photoinitiator, and adjust physical properties such as viscosity of the obtained composition for the black matrix 13.
The mesoporous carbon is a novel non-silicon-based mesoporous material and has huge specific surface area and pore volume. Mesoporous carbon generally refers to a mesoporous material in which the main component constituting the mesoporous material is carbon element, and examples of the mesoporous carbon include, but are not limited to, one or any combination of CMK-1, CMK-2, CMK-3, CMK-4, CMK-5, C-MSU-H, N-OMC, G-CMK-3, OMC, and the like.
In one embodiment, the refractive layer 4 is made of a transparent optical material, and the refractive index of the refractive layer 4 is 1.2 to 1.8. For example, the refractive index of the first sub-refractive layer 41 may be 1.2, and the refractive index of the second sub-refractive layer 42 may be 1.5. For another example, the refractive index of the first sub-refractive layer 41 may be 1.6, and the refractive index of the second sub-refractive layer 42 may be 1.4.
The different refracting indexes of two sub-refraction layers adjust the output light carrying information to different observation points, so that the defect that the visual angle of the display panel is small due to the fact that the light received by the observation points only carries a certain liquid crystal state and the information is single, so that different observation points generate color cast can be overcome.
In one embodiment, the transparent optical material of the refraction layer 4 may include epoxy prepolymer, polyurethane prepolymer, silicone prepolymer, polyester prepolymer, polyether prepolymer, polyhydroxy polyolefin oligomer, polybutadiene prepolymer, fluorine-modified prepolymer, and the like, and the light transmittance is above 90%.
The color filter in this embodiment includes a color filter substrate, and the manufacturing process of the color filter substrate includes: the manufacturing method comprises a forming process of a shading pattern layer, a forming process of a color filter layer, a forming process of a common electrode layer and a forming process of a spacing column.
A step of forming a light-shielding pattern layer by coating the cleaned glass substrate with a light-shielding photosensitive composition coating liquid, and controlling the film thickness by controlling the discharge amount and the coating speed; after the heat plate is preheated, a proximity exposure machine provided with a high-pressure mercury lamp and a quartz exposure photomask with a specified pattern are used for exposure; the resist pattern layer was developed in a potassium hydroxide developer by a carrier developing apparatus and finally baked at a specific temperature to obtain a light-shielding pattern layer.
And a color filter layer forming process of coating the substrate with the light-shielding pattern layer with a red (R) photosensitive coloring composition coating liquid instead of the light-shielding photosensitive composition coating liquid, and similarly preheating, exposing, developing and baking to obtain a red pixel. The green (G) photosensitive coloring composition coating liquid is used to replace the red photosensitive coloring composition coating liquid, and the green pixel is formed under the condition that the green (G) photosensitive coloring composition coating liquid is not changed. Then, the red photosensitive coloring composition coating liquid was replaced with the blue (B) photosensitive coloring composition coating liquid, and blue pixels were formed under the same conditions as the rest, and finally, a color filter was obtained.
In the process of forming the common electrode layer, an Indium Tin Oxide (ITO) transparent common electrode layer is formed on the R pixels, the G pixels, the B pixels, and the light-shielding pattern layer of the obtained color filter layer by sputtering.
The spacer formation process comprises peeling off the surface protective film of the photosensitive transfer film for spacer, superposing the exposed surface of the photosensitive resin layer on the ITO film formed by sputtering the color filter substrate, and applying a lamination process under a pressure and heating condition at 130 ℃ and a line pressure of 100N/cm by using a transfer printing device. Subsequently, after the PET temporary support was peeled off from the back surface of the laminated photosensitive resin layer, the space between the front surface of the photomask and the front surface of the photosensitive resin layer was set to 150 μm using a proximity exposure machine and a quartz exposure mask having an image pattern, and exposure was performed with an exposure amount of 100mJ/cm 2. And an inclined conveying type developing device is used for sequentially passing through a developing solution I containing triethanolamine, a developing solution II containing sodium carbonate series and a developing solution III containing a cleaning agent to carry out development and obtain an ideal spacer column pattern after baking.
The invention also provides a display device, which comprises the display panel, wherein the display panel comprises a liquid crystal layer 11, a thin film transistor layer 12, a color filter 2, a polarizer 3 and a refraction layer 4; the color filter 2 is positioned on one side of the light emergent direction of the liquid crystal layer 11; the polaroid 3 is positioned on one side of the light emergent direction of the color filter 2; the refraction layer is positioned on one side of the light-emitting direction of the polarizer 3 and comprises a plurality of sub-refraction layers with different refractive indexes.
The invention makes the refraction layer of different refractive indexes in the outer side of color filter 2, achieve the effect of the angle of light-out of the microscopic regulation, the different optical effects of multiple refraction layers, adjust the output light carrying information to different observation points, in this way, can improve because the light that the observation point receives only carries a certain liquid crystal state, the information is relatively single to make different observation points produce the color cast, thus cause the defect that the visual angle of the display panel is smaller; on the other hand, because the multilayer film is used for adjusting the light-emitting angle, the adjustment can be completed in the prior manufacturing technology of the substrate, and a wide-viewing-angle film does not need to be additionally arranged, so that the aim of saving the cost can be achieved.
In one embodiment, the refraction layer 4 at least includes a first sub-refraction layer 41 and a second sub-refraction layer 42, and the first sub-refraction layer 41 and the second sub-refraction layer 42 are disposed on the polarizer 3 in an interlaced manner. Because the refractive index of first sub-refraction layer 41 and second from refraction layer is different, consequently can produce the light of different light-emitting directions, because the light that carries information has passed through certain refraction processing before getting into the people's eye, can mix the light information of different liquid crystal forms to same observation point like this in certain extent, will improve the colour cast phenomenon like this to can promote the visual angle scope.
In one embodiment, each of the first and second sub-refractive layers 41 and 42 includes convex portions and concave portions that are staggered with each other, the convex portions of the first sub-refractive layer 41 are located in the concave portions of the second sub-refractive layer 42, and the convex portions of the second sub-refractive layer 42 are located in the concave portions of the first sub-refractive layer 41. With such a structure, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be tightly combined with each other, so that the whole refraction layer is relatively flat, and the light transmittance of the refraction layer is improved.
In one embodiment, the convex portions of the first sub-refractive layer 41 and the convex portions of the second sub-refractive layer 42 are triangular prism structures. Similar to the state where gears intermesh. Therefore, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be further combined tightly, so that the whole refraction layer is relatively flat, and the light transmittance of the refraction layer is improved.
In one embodiment, the cross section of the triangular prism structure is an isosceles triangle, and an apex angle of the isosceles triangle faces the light exit direction of the polarizer 3. Such a structure may make the combination of the first sub-refractive layer 41 and the second sub-refractive layer 42 more regular and more compact.
In one embodiment, the vertex angle of the isosceles triangle ranges from 30 ° to 120 °, and both base angles of the isosceles triangle range from 30 ° to 75 °. For example, when the top angle is 60 °, the bottom angle is also 60 °, so that the cross section of the triangular prism structure is a regular triangle, which further makes the combination of the first sub-refractive layer 41 and the second sub-refractive layer 42 more regular and more compact.
In an embodiment, the top angle may also be 90 °, the two bottom angles are 45 °, and at this time, the cross section of the triangular prism structure is an isosceles right triangle, so that the combination of the first sub-refraction layer 41 and the second sub-refraction layer 42 is further more regular, and the structure is more compact.
In one embodiment, the first sub-refractive layers 41 and the second sub-refractive layers 42 are both in a wave-shaped structure, the peaks of the first sub-refractive layers 41 are located in the valleys of the second sub-refractive layers 42, and the peaks of the second sub-refractive layers 42 are located in the valleys of the first sub-refractive layers 41. Therefore, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be further combined tightly, so that the refraction layer is flat and smooth, and the light transmittance of the refraction layer is improved.
In one embodiment, the first sub-refraction layer 41 includes a plurality of regular trapezoid structures, and the second sub-refraction layer 42 includes a plurality of inverted trapezoid structures, and the inclined angle of the inclined side of the regular trapezoid structure is complementary to the inclined angle of the inclined side of the inverted trapezoid structure. Therefore, the first sub-refraction layer 41 and the second sub-refraction layer 42 can be further combined tightly, so that the refraction layer is flat and smooth, and the light transmittance of the refraction layer is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A display panel, comprising:
a thin film transistor layer;
a liquid crystal layer;
the color filter is positioned on one side of the light emergent direction of the liquid crystal layer;
the polaroid is positioned on one side of the light emergent direction of the color filter;
and the refraction layer is positioned on one side of the light emitting direction of the polaroid and comprises a plurality of sub-refraction layers with different refractive indexes.
2. The display panel according to claim 1, wherein the refractive layer comprises at least a first sub-refractive layer and a second sub-refractive layer, and the first sub-refractive layer and the second sub-refractive layer are disposed on the polarizer in an interlaced manner.
3. The display panel according to claim 2, wherein the first sub-refractive layer and the second sub-refractive layer each include convex portions and concave portions that are staggered with each other, the convex portions of the first sub-refractive layer are located in the concave portions of the second sub-refractive layer, and the convex portions of the second sub-refractive layer are located in the concave portions of the first sub-refractive layer.
4. The display panel according to claim 3, wherein the convex portions of the first sub-refractive layer and the convex portions of the second sub-refractive layer are triangular prism structures.
5. The display panel according to claim 4, wherein the cross section of the triangular prism structure is an isosceles triangle, and the vertex angle of the isosceles triangle faces the light exit direction of the polarizer.
6. The display panel according to claim 5, wherein the vertex angle of the isosceles triangle ranges from 30 ° to 120 °, and both base angles of the isosceles triangle range from 30 ° to 75 °.
7. The display panel according to claim 2 or 3, wherein the first sub-refractive layer and the second sub-refractive layer are both in a wave-shaped structure, peaks of the first sub-refractive layer are located in troughs of the second sub-refractive layer, and peaks of the second sub-refractive layer are located in troughs of the first sub-refractive layer.
8. The display panel according to claim 2, wherein the first sub-refraction layer comprises a plurality of regular trapezoid structures, and the second sub-refraction layer comprises a plurality of inverted trapezoid structures, and the inclined angle of the regular trapezoid structures is complementary to the inclined angle of the inverted trapezoid structures.
9. The display panel of claim 1, wherein the refractive layer is made of a transparent optical material, and the refractive index of the refractive layer is 1.2 to 1.8.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
CN202111520279.2A 2021-12-13 2021-12-13 Display panel and display device Pending CN114185196A (en)

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Application publication date: 20220315