Display device
By setting a multi-layer anti-reflection layer with a decrease in refractive index in the non-display area of the display panel, the light leakage problem caused by the metal trace reflection of the array substrate in a narrow-bezel liquid crystal display is solved, and the visual effect is improved without the loss of display area.
Patent Information
- Application Number
- CN202411455640.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-01-03
AI Technical Summary
In traditional narrow-bezel LCD displays, the reflection of the surrounding metal traces of the array substrate leads to light leakage problems. Existing solutions such as the use of light-shielding materials will increase costs and lose display area.
An anti-reflection layer is provided in the non-display area of the display panel, and a multi-layer structure with a decrease in refractive index is used to reduce reflected light from the metal trace, and light leakage is reduced through the reflected light interference destruction principle.
It effectively reduces the reflected light from the metal traces around the array substrate, improves the visual effect of the narrow-bezel display, and does not lose the display area of the display area.
Smart Images
Figure CN119247648A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a display device. Background Art
[0002] With the development of the times and the continuous improvement of the display performance of liquid crystal displays (LCDs), consumers have begun to pursue the aesthetics of displays, and ultra-narrow border displays have received more and more attention. The architecture of a liquid crystal display is mainly composed of three parts: an array substrate, a color film substrate, and a liquid crystal layer arranged between the two substrates. In a traditional four-sided borderless display device, in order to reduce the bending of devices such as chip on film (COF) during assembly, the array substrate is usually facing the consumer viewing side, and the color film substrate is close to the backlight side. As we all know, there will be a large number of metal traces in the peripheral area of the array substrate, and the metal pattern density of these lines is relatively large. When the array substrate is facing the display side, these metal traces will have obvious reflections, resulting in light leakage on the four sides of the display, which will seriously affect the visual viewing effect of consumers. In order to improve the light leakage problem of a four-sided borderless display, the traditional way is to use a light-shielding material to reduce light leakage, but this method is complex and will increase the production cost, and will also lose the display area of the AA area. Summary of the invention
[0003] The embodiment of the present application provides a display device that can solve the light leakage problem caused by the reflection of the peripheral metal wiring of the array substrate of the narrow-frame display without losing the display area of the display region.
[0004] In order to achieve the above object, according to a first aspect of the present application, a display device is provided, comprising:
[0005] The display panel comprises an array substrate and a color film substrate arranged opposite to each other, wherein the array substrate is located at a light emitting side of the display panel, and the color film substrate is located at a backlight incident side of the display panel; the display panel comprises a display area and a non-display area located at least on one side of the display area;
[0006] A backlight module, arranged on the light incident side of the display panel; and
[0007] The anti-reflection layer is arranged on a side of the array substrate away from the color filter substrate, and the anti-reflection layer at least covers the non-display area.
[0008] In some embodiments, the anti-reflection layer includes N refractive layers stacked together, and the refractive indices of the N refractive layers decrease in sequence along the direction from the color filter substrate to the array substrate, wherein N is greater than or equal to 2.
[0009] In some embodiments, the anti-reflection layer includes a first refraction layer and a second refraction layer, the first refraction layer is located on a side of the array substrate away from the color film substrate, and the second refraction layer is located on a side of the first refraction layer away from the array substrate, wherein the refractive index of the first refraction layer is greater than the refractive index of the second refraction layer.
[0010] In some embodiments, the refractive index of the first refractive layer ranges from 1.6 to 1.7, and the refractive index of the second refractive layer ranges from 1.3 to 1.4.
[0011] In some embodiments, the first refractive layer includes a first resin material and first particles, the refractive index of the first resin material ranges from 1.48 to 1.52, and the refractive index of the first particles ranges from 1.5 to 2.3.
[0012] In some embodiments, the second refractive layer includes a second resin material and second particles, the refractive index of the second resin material is in a range of 1.4 to 1.45, and the refractive index of the second particles is in a range of 1.1 to 1.4.
[0013] In some embodiments, the second resin material contains fluorine.
[0014] In some embodiments, a distance between a side of the anti-reflection layer close to the display area and a side of the anti-reflection layer close to an edge of the array substrate is 1 mm to 15 mm.
[0015] In some embodiments, the anti-reflection layer has a thickness ranging from 3 μm to 20 μm.
[0016] In some embodiments, the display panel also includes a first polarizer and a second polarizer, the first polarizer is located on a side of the array substrate away from the color film substrate, and the second polarizer is located on a side of the color film substrate away from the array substrate, wherein the anti-reflection layer is located on a side of the first polarizer away from the array substrate.
[0017] The display device provided in the embodiment of the present application provides an anti-reflection layer on the side of the array substrate away from the backlight module, and the anti-reflection layer covers the non-display area of the display panel, that is, covers the metal wiring area around the array substrate. The anti-reflection layer can greatly reduce the light reflected by the metal wiring of the array substrate, thereby solving the light leakage problem caused by the reflection of the surrounding metal wiring when the array substrate of the narrow-frame display is set on the consumer's viewing side, and at the same time will not lose the display area of the display area. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.
[0019] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.
[0020] Figure 1 is a structural schematic diagram of a display device provided in an embodiment of the present application;
[0021] Figure 2 is a cross-sectional view of a display device provided in an embodiment of the present application;
[0022] Figure 3 is a cross-sectional view of an anti-reflection layer of a display device provided in an embodiment of the present application;
[0023] Figure 4 is a schematic diagram of a light path of an anti-reflection layer provided in an embodiment of the present application;
[0024] Figure 5 yes Figure 4 A schematic diagram of the destructive interference principle of reflected light of an anti-reflection layer;
[0025] Figure 6 is a cross-sectional view of an anti-reflection layer of another display device provided in an embodiment of the present application;
[0026] Figure 7 It is a top view of an anti-reflection layer of a display device provided in an embodiment of the present application.
[0027] Description of reference numerals:
[0028] 100, display device; 110, display panel; 111, array substrate; 112, color film substrate; 113, liquid crystal layer; 114, frame glue; 120, backlight module; 130, anti-reflection layer; 131, first refractive layer; 1311, first resin material; 1312, first particles; 132, second refractive layer; 1321, second resin material; 1322, second particles; 140, first polarizer; 150, second polarizer. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0030] See also Figure 1-Figure 2 , Figure 1 is a schematic structural diagram of a display device 100 provided in an embodiment of the present application, Figure 2 1 is a cross-sectional view of a display device 100 provided in an embodiment of the present application. The present application provides a display device 100 , which at least includes a display panel 110 , a backlight module 120 and an anti-reflection layer 130 .
[0031] The display panel 110 includes an array substrate 111 and a color filter substrate 112 that are arranged opposite to each other, wherein the array substrate 111 is located on the light-emitting side of the display panel 110, and the color filter substrate 112 is located on the backlight-entering side of the display panel 110. For the liquid crystal display panel 110, a liquid crystal layer 113 and a frame glue 114 surrounding the liquid crystal layer 113 are also included between the array substrate 111 and the color filter substrate 112. The display panel 110 has a display area AA and a non-display area NA located on at least one side of the display area AA. For example, the non-display area NA can be located on one side, two sides, three sides of the display area AA, or surround the display area AA. The array substrate 111 of the present application is arranged on a side of the color filter substrate 112 away from the backlight module 120, that is, the array substrate 111 is close to the consumer viewing side, and the color filter substrate 112 is close to the backlight module 120 side. This structural design can reduce the impact of bending during the assembly process of the display panel 110 on the devices (such as COF) on the array substrate 111, so as to further improve the performance of the display panel 110.
[0032] The array substrate 111 includes a substrate and a driving circuit located on the substrate. The substrate may be a flexible substrate or a rigid substrate, the flexible substrate may be polyimide (PI), etc., and the rigid substrate may be glass, etc. The driving circuit includes thin film transistors and metal wiring arranged in an array, the metal wiring connects the thin film transistors and the integrated chip located in the non-display area, etc. In order not to affect the display area, a large number of metal wirings will be arranged in the peripheral non-display area of the array substrate 111.
[0033] The color filter substrate 112 is arranged opposite to the array substrate 111, and includes a substrate and a color filter layer located on the substrate. The substrate may be a flexible substrate or a rigid substrate, the flexible substrate may be polyimide (PI), etc., and the rigid substrate may be glass, etc. The color filter layer includes at least one of a red color resistor, a green color resistor, and a blue color resistor, and a black matrix located between the color resistors.
[0034] The backlight module 120 is arranged on the light incident side of the display panel 110, that is, the side of the color filter substrate 112 away from the array substrate 111, and can be a direct-type backlight module or an edge-type backlight module, but is not limited thereto. The backlight module 120 includes a light source, a light guide plate, and an optical film group, wherein the optical film group is located on the side of the color filter substrate 112 away from the array substrate 111, the light guide plate is located on the side of the optical film group away from the color filter substrate 112, and the light source can be located on the side of the light guide plate away from the optical film group or on the side of the light guide plate. Specifically, the structure of the backlight module 120 can refer to the prior art and will not be repeated here.
[0035] The anti-reflection layer 130 is disposed on a side of the array substrate 111 away from the color filter substrate 112, and the anti-reflection layer 130 at least covers the non-display area NA. Since a large number of metal traces of the array substrate 111 are arranged in the peripheral non-display area of the array substrate 111, the distribution density of the metal traces in the non-display area NA of the array substrate 111 is relatively large. When the array substrate 111 is disposed close to the viewing side of the consumer, these metal traces will have obvious reflections, resulting in light leakage around the display panel 110, which seriously affects the visual viewing effect of the consumer. Therefore, the present application sets an anti-reflection layer 130 on the side of the array substrate 111 away from the color filter substrate 112, and the anti-reflection layer 130 covers the metal wiring in the non-display area NA around the array substrate 111. Since the anti-reflection layer 130 has the function of reducing light reflection, the reflected light of the metal wiring around the array substrate 111 can be greatly reduced, thereby improving the light leakage problem caused by the reflection of the metal wiring around the array substrate 111 when the array substrate 111 is set close to the consumer viewing side, and the anti-reflection layer 130 is set in the non-display area NA, and the display area of the display area AA will not be lost.
[0036] In some embodiments, the display panel 110 further includes a first polarizer 140 and a second polarizer 150. The first polarizer 140 is located on a side of the array substrate 111 away from the color filter substrate 112, and the second polarizer 150 is located on a side of the color filter substrate 112 away from the array substrate 111, and is located between the color filter substrate 112 and the backlight module 120. The anti-reflection layer 130 is disposed on a side of the first polarizer 140 away from the array substrate 111. The anti-reflection layer 130 is an independent film layer, which can be directly attached to the surface of the first polarizer 140 after the process of the liquid crystal display panel 110 is completed, or directly attached to the periphery of the polarizer during the process of the first polarizer 140, and then the first polarizer 140 with the anti-reflection layer 130 attached is attached to the array substrate. The anti-reflection layer 130 is disposed on the first polarizer 140 without affecting the existing process of the display panel 110, and will not affect the internal structure of the display panel 110, and the process is simple and the cost is low.
[0037] In some embodiments, the anti-reflection layer 130 includes N refractive layers stacked in sequence, and the refractive indexes of the N refractive layers decrease in sequence along the direction from the color filter substrate 112 to the array substrate 111, wherein N is greater than or equal to 2, for example, N can be a positive integer greater than or equal to 2, such as 2, 3, 4, 5, 6, etc. Figure 3 , Figure 3 1 is a cross-sectional view of an anti-reflection layer 130 of a display device 100 provided in an embodiment of the present application. The anti-reflection layer 130 includes a first refractive layer, a second refractive layer, a third refractive layer, and an Nth refractive layer stacked in sequence, wherein the refractive index n1 of the first refractive layer is greater than the refractive index n2 of the second refractive layer, and the refractive index n3 of the third refractive layer is greater than the refractive index n4 of the Nth refractive layer. N The present application utilizes the principle of destructive interference of reflected light, that is, when external incident light is incident on a medium with a different refractive index, its reflected light will interfere destructively. By gradually reducing the refractive index of the N anti-reflective refractive layers, when external light passes through the anti-reflective layer 130, due to the destructive interference of the reflected light, the reflected light of the peripheral metal wiring of the array substrate 111 can be reduced, thereby overcoming the strong reflection problem of the peripheral metal wiring of the array substrate 111.
[0038] Please refer to Figure 4-Figure 5 , Figure 4 is a schematic diagram of an optical path of an anti-reflection layer provided in an embodiment of the present application, Figure 5 yes Figure 4 Schematic diagram of the principle of destructive interference of reflected light of an anti-reflection layer. Among them, L1 and L3 are incident light, and L2 and L4 are reflected light; the light enters the dense medium (medium layer with a large refractive index) from the optically sparse medium (medium layer with a small refractive index) and is reflected. The optical path difference between the reflected light L2 and L4 satisfies that the two groups of reflected light have opposite phases, so the interference is destructive.
[0039] It should be noted that in the present application, the number of film layers included in the anti-reflection layer 130 is not limited, but considering that the more film layers the anti-reflection layer 130 has, the greater the overall thickness of the anti-reflection layer 130 will be, which will lead to a greater increase in the thickness of the display device 100, and the more film layers, the more complicated the process. Preferably, the anti-reflection layer 130 includes two refractive layers, three refractive layers, or four refractive layers.
[0040] In some embodiments, please refer to Figure 6 , Figure 61 is a cross-sectional view of another anti-reflection layer 130 of a display device 100 provided in an embodiment of the present application. The anti-reflection layer 130 includes a stacked first refractive layer 131 and a second refractive layer 132, wherein the first refractive layer 131 is located on a side of the array substrate 111 away from the color filter substrate 112, and the second refractive layer 132 is located on a side of the first refractive layer 131 away from the array substrate 111, wherein the refractive index of the first refractive layer 131 is greater than the refractive index of the second refractive layer 132. When external light passes through the anti-reflection layer 130, due to the interference destructive reaction of the reflected light, the reflected light of the peripheral metal wiring of the array substrate 111 can be reduced, thereby overcoming the strong reflection problem of the peripheral metal wiring of the array substrate 111. In this embodiment, the anti-reflection layer 130 includes two refractive layers, which can achieve the effect of reducing the reflected light while simplifying the process and will not cause the film layer to be too thick.
[0041] In some embodiments, the refractive index of the first refractive layer 131 is in the range of 1.6 to 1.7, and the refractive index of the second refractive layer 132 is in the range of 1.3 to 1.4. When the refractive index of the first refractive layer 131 and the refractive index of the second refractive layer 132 are within the above range, the display device 100 has a good display effect of destructive interference of reflected light. When the refractive index of the first refractive layer 131 and the refractive index of the second refractive layer 132 are lower than or exceed the above range, the display effect of the display device 100 will be deteriorated.
[0042] Since the refractive index of common resin materials is generally around 1.5, in order to increase or decrease the refractive index of the resin material, particles with different refractive indices can be added to the resin material, because the refractive indices of different particles are significantly different. For example, particles with a high refractive index can be added to the resin material to increase the refractive index of the resin material to obtain a high refractive index film layer, and particles with a low refractive index can also be added to the resin material to reduce the refractive index of the resin material to obtain a low refractive index film layer.
[0043] In some embodiments, please refer to Figure 6 The first refractive layer 131 includes a first resin material 1311 and first particles 1312. The refractive index of the first resin material 1311 is in the range of 1.48 to 1.52, and the refractive index of the first particles 1312 is in the range of 1.5 to 2.3. By adding the first particles 1312 with a high refractive index to the first resin material 1311 with a refractive index in the range of 1.48 to 1.52, the refractive index of the first resin material 1311 can be increased, so that the refractive index of the first refractive layer 131 reaches 1.6 to 1.7.
[0044] In some embodiments, please refer to Figure 6The second refractive layer 132 includes a second resin material 1321 and second particles 1322. The refractive index of the second resin material 1321 is in the range of 1.4 to 1.45, and the refractive index of the second particles 1322 is in the range of 1.1 to 1.4. By adding the second particles 1322 with a low refractive index to the second resin material 1321 with a refractive index in the range of 1.4 to 1.45, the refractive index of the second resin material 1321 can be reduced, so that the refractive index of the second refractive layer 132 reaches 1.3 to 1.4.
[0045] In the above embodiment, in order to reduce the refractive index of the resin material, fluorine element may be added to the common resin material (refractive index is generally about 1.5), because fluorine element can reduce the refractive index of the resin material. The second resin material 1321 may be a resin containing fluorine element, so that the refractive index range of the second resin material 1321 is reduced to 1.4-1.45.
[0046] In some embodiments, the first particles 1312 may be metal oxide particles with a high refractive index, such as zinc oxide nanoparticles (refractive index of 1.9), titanium oxide nanoparticles (refractive index of 2.1-2.3), tin oxide nanoparticles (refractive index of 1.9), but are not limited thereto. The second particles 1322 may be inorganic material particles with a low refractive index, such as hollow silica particles (refractive index of 1.0-1.46), but are not limited thereto.
[0047] In some embodiments, the first resin material 1311 may include an ultraviolet light-curable resin (without fluorine), such as epoxy acrylate oligomer, but not limited thereto. The second resin material 1321 may include a fluorine-containing resin, wherein the fluorine-containing resin material may be a fluorine-containing ultraviolet light-curable resin, such as a fluorine-containing polymer copolymerized from a perfluoroolefin monomer, a vinyl ether acrylate monomer, a vinyl hydroxyethyl ether, and an ethylene monomer, such as a fluorine-containing epoxy acrylate oligomer, a fluorine-containing polyurethane acrylate oligomer, but not limited thereto.
[0048] In some embodiments, the thickness of the anti-reflection layer 130 ranges from 3 μm to 20 μm, and preferably, the thickness of the anti-reflection layer 130 ranges from 4 μm to 10 μm. When the thickness of the anti-reflection layer 130 is within this range, it has a better anti-reflection effect, and will not affect the display effect of the display panel 110, nor will it cause the overall thickness of the display device 100 to increase too much.
[0049] In some embodiments, please refer to Figure 2 and Figure 7 , Figure 71 is a top view of an anti-reflection layer 130 of a display device 100 provided in an embodiment of the present application. When the non-display area NA of the display panel 110 surrounds the display area AA, the anti-reflection layer 130 covers the non-display area NA to form a hollow frame structure, such as a rectangular frame structure, and the distance W between the side of the anti-reflection layer 130 close to the display area AA and the side of the anti-reflection layer 130 close to the edge of the array substrate 111 is the width of the anti-reflection layer 130, and the width W of the anti-reflection layer 130 ranges from 1 mm to 15 mm.
[0050] Specifically, the non-display area NA of the display panel 110 includes a binding end and a non-binding end. The binding end is provided with an integrated chip or COF or other devices. Therefore, the width of the binding end is greater than the width of the non-binding end. Figure 7 As shown, the anti-reflection layer 130 includes a first side D corresponding to the binding end and a second side R, a third side L and a fourth side U covering the non-binding end. The width W of the first side is D Greater than the width W of the second side R , the width of the third side W L and the width W of the fourth side U Furthermore, the width W of the first side D The range is 8mm~12mm, and the width W of the second side R The range is 2mm~6.6mm, and the width W of the third side L The range of the fourth side is 2mm~6.6mm, and the width W U The range of W is 2 mm to 6.6 mm, and the widths of the second side R, the third side L, and the fourth side U may be equal or unequal, and are not limited here. R =W L =W U =5.6mm, W D =6.5mm; in some other narrow-frame display devices, W R =W L =W U =3.5mm or W R =W L =W U =5.5mm; specific W R , W L , W U , W D The width can be designed according to the specific size of the display panel.
[0051] The display device of the present application can be applied to narrow-border display products or borderless display products, such as narrow-border liquid crystal display products, but is not limited thereto.
[0052] The display device provided by the present application, by arranging an anti-reflection layer on the side of the array substrate away from the backlight module, and the anti-reflection layer covers the non-display area of the display panel, that is, covers the peripheral metal wiring area of the array substrate. The anti-reflection layer can greatly reduce the light reflected by the metal wiring of the array substrate, thereby solving the light leakage problem caused by the reflection of the metal wiring on the four sides when the array substrate of the narrow-frame display is arranged on the consumer's viewing side, and at the same time will not lose the display area of the display area.
[0053] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0054] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0055] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.
[0056] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.
Claims
1. A display device, characterized in that: include: The display panel comprises an array substrate and a color film substrate which are arranged opposite to each other, wherein the array substrate is located at a light emitting side of the display panel, and the color film substrate is located at a backlight incident side of the display panel; The display panel comprises a display area and a non-display area located at least on one side of the display area; A backlight module, arranged on the light incident side of the display panel; as well as The anti-reflection layer is arranged on a side of the array substrate away from the color filter substrate, and the anti-reflection layer at least covers the non-display area.
2. The display device according to claim 1, characterized in that The anti-reflection layer includes N refractive layers stacked together, and the refractive indices of the N refractive layers decrease in sequence along the direction from the color filter substrate to the array substrate, wherein N is greater than or equal to 2.
3. The display device according to claim 2, characterized in that: The anti-reflection layer includes a first refractive layer and a second refractive layer, wherein the first refractive layer is located on a side of the array substrate away from the color film substrate, and the second refractive layer is located on a side of the first refractive layer away from the array substrate, wherein the refractive index of the first refractive layer is greater than the refractive index of the second refractive layer.
4. The display device according to claim 3, characterized in that: The refractive index of the first refractive layer is in the range of 1.6 to 1.7, and the refractive index of the second refractive layer is in the range of 1.3 to 1.
4.
5. The display device according to claim 3, characterized in that: The first refractive layer includes a first resin material and first particles. The refractive index of the first resin material ranges from 1.48 to 1.52, and the refractive index of the first particles ranges from 1.5 to 2.
3.
6. The display device according to claim 3, characterized in that: The second refractive layer includes a second resin material and second particles, the refractive index of the second resin material is in the range of 1.4 to 1.45, and the refractive index of the second particles is in the range of 1.1 to 1.
4.
7. The display device according to claim 6, characterized in that: The second resin material contains fluorine element.
8. The display device according to any one of claims 1 to 7, characterized in that: The distance between a side of the anti-reflection layer close to the display area and a side of the anti-reflection layer close to the edge of the array substrate is 1 mm to 15 mm.
9. The display device according to any one of claims 1 to 7, characterized in that: The thickness of the anti-reflection layer is in the range of 3 μm to 20 μm.
10. The display device according to any one of claims 1 to 7, characterized in that: The display panel also includes a first polarizer and a second polarizer, the first polarizer is located on a side of the array substrate away from the color film substrate, and the second polarizer is located on a side of the color film substrate away from the array substrate, wherein the anti-reflection layer is located on a side of the first polarizer away from the array substrate.