Liquid crystal display screen capable of avoiding glass deformation and vehicle-mounted display screen

Abstract

The utility model discloses a liquid crystal display screen and a vehicle-mounted display screen capable of avoiding glass deformation, the liquid crystal display screen capable of avoiding glass deformation comprises TFT glass, a cover plate and double-layer optical cement, and the upper surface and the lower surface of the TFT glass are respectively provided with an upper polaroid and a lower polaroid; the cover plate is arranged above the TFT glass; the double-layer optical cement comprises first OCA optical cement arranged on the lower surface of the cover plate and second OCA optical cement arranged on the lower surface of the first OCA optical cement, and the TFT glass is attached to the cover plate through the first OCA optical cement and the second OCA optical cement. Due to the fact that the OCA optical cement in the structure is double-layer optical cement, the thickness of the OCA optical cement is increased equivalently, the OCA optical cement of the same series can be laminated and sliced, the effect that the first OCA optical cement and the second OCA optical cement form the composite OCA optical cement to increase the total thickness is achieved, the material becomes soft after the storage elasticity is reduced, and the service life of the OCA optical cement is prolonged. And deformation caused by high temperature is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more particularly to a liquid crystal display screen and a vehicle-mounted display screen capable of avoiding glass deformation. Background Art

[0002] Customers have reported that the corners of modules with PMMA cover plates will turn white during high-temperature reliability testing. Analysis revealed that this is because the OCA optical adhesive used to bond the PMMA cover plates is relatively thin, typically 250μm or less. OCA optical adhesive of this thickness has a high storage modulus and a relatively hard material. Under high-temperature conditions, deformation of the PMMA cover plate is more easily transmitted to the TFT glass through the OCA optical adhesive, causing it to deform synchronously. This can squeeze the liquid crystal within the TFT glass and cause whitening and uneven display. In theory, increasing the thickness of the OCA optical adhesive can reduce its storage modulus, softening the material and reducing deformation caused by high temperatures. However, thicker OCA optical adhesives are uncommon, and if manufacturers increase the thickness of the OCA optical adhesive, rolling the material into a roll becomes difficult. Utility Model Content

[0003] The technical problem to be solved by the present invention is how to reduce the storage elasticity of OCA optical adhesive, reduce deformation caused by high temperature, thereby avoiding glass deformation, and further preventing the problem of whitening and uneven display caused by the squeezing of liquid crystal in TFT glass.

[0004] The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0005] In order to solve the above technical problems, the present invention provides a liquid crystal display screen that avoids glass deformation, which includes TFT glass, a cover plate and a double-layer optical adhesive, the upper surface and lower surface of the TFT glass are respectively provided with an upper polarizer and a lower polarizer; the cover plate is arranged above the TFT glass; the double-layer optical adhesive includes a first OCA optical adhesive arranged on the lower surface of the cover plate and a second OCA optical adhesive arranged on the lower surface of the first OCA optical adhesive, and the TFT glass and the cover plate are bonded to each other through the first OCA optical adhesive and the second OCA optical adhesive.

[0006] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the thickness of the double-layer optical adhesive is 375 μm-500 μm.

[0007] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the thickness of the first OCA optical adhesive and the second OCA optical adhesive are both 250 μm.

[0008] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the thickness of the first OCA optical adhesive is 250 μm, and the thickness of the second OCA optical adhesive is 125 μm.

[0009] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the first OCA optical adhesive and the second OCA optical adhesive are integrally formed.

[0010] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the double-layer optical adhesive is colorless and transparent OCA optical adhesive.

[0011] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the material of the cover plate is PMMA.

[0012] As a preferred embodiment of the liquid crystal display screen for avoiding glass deformation provided by the present invention, the TFT glass includes a large piece of glass, a liquid crystal layer and a small piece of glass stacked in sequence from bottom to top.

[0013] A vehicle-mounted display screen is a liquid crystal display screen that avoids glass deformation as described in any one of the above items.

[0014] As a preferred embodiment of the vehicle-mounted display screen provided by the present invention, a backlight module is provided below the TFT glass.

[0015] The utility model has the following beneficial effects:

[0016] Since the OCA optical glue in this structure adopts double-layer optical glue, it is equivalent to increasing the thickness of the OCA optical glue. It can be achieved by stacking and slicing the OCA optical glue of the same series to form a composite OCA optical glue with the first OCA optical glue and the second OCA optical glue to increase the total thickness. After reducing the storage elastic modulus, the material becomes softer and the deformation caused by high temperature is reduced, thereby avoiding the deformation of the TFT glass, and further preventing the problem of uneven white display caused by the squeezing of liquid crystal in the TFT glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the solutions in this application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a schematic structural diagram of a liquid crystal display screen that avoids glass deformation provided by the present invention.

[0019] Figure 2 The present invention provides a schematic structural diagram of a vehicle-mounted display screen.

[0020] Description of Figure Numbers:

[0021] TFT glass 1; cover plate 2; double-layer optical adhesive 3; upper polarizer 4; lower polarizer 5; first OCA optical adhesive 31; second OCA optical adhesive 32; backlight module 6. DETAILED DESCRIPTION

[0022] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0025] The utility model provides a liquid crystal display screen that avoids glass deformation, which includes TFT glass, a cover plate and a double-layer optical adhesive, wherein the upper surface and the lower surface of the TFT glass are respectively provided with an upper polarizer and a lower polarizer; the cover plate is arranged above the TFT glass; the double-layer optical adhesive includes a first OCA optical adhesive arranged on the lower surface of the cover plate and a second OCA optical adhesive arranged on the lower surface of the first OCA optical adhesive, and the TFT glass and the cover plate are bonded to each other through the first OCA optical adhesive and the second OCA optical adhesive.

[0026] Since the OCA optical glue in this structure adopts double-layer optical glue, it is equivalent to increasing the thickness of the OCA optical glue. It can be achieved by stacking and slicing the OCA optical glue of the same series to form a composite OCA optical glue with the first OCA optical glue and the second OCA optical glue to increase the total thickness. After reducing the storage elastic modulus, the material becomes softer and the deformation caused by high temperature is reduced, thereby avoiding the deformation of the TFT glass, and further preventing the problem of uneven white display caused by the squeezing of liquid crystal in the TFT glass.

[0027] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be understood as limiting the present invention.

[0028] Example 1, please refer to Figure 1 The present invention provides a liquid crystal display screen that avoids glass deformation, comprising a TFT glass 1, a cover plate 2, and a double-layer optical adhesive 3. The upper and lower surfaces of the TFT glass 1 are provided with an upper polarizer 4 and a lower polarizer 5, respectively; the cover plate 2 is provided above the TFT glass 1; the double-layer optical adhesive 3 comprises a first OCA optical adhesive 31 provided on the lower surface of the cover plate 2 and a second OCA optical adhesive 32 provided on the lower surface of the first OCA optical adhesive 31. The TFT glass 1 and the cover plate 2 are bonded together by the first OCA optical adhesive 31 and the second OCA optical adhesive 32. Since the OCA optical adhesive in this structure adopts a double-layer optical adhesive 3, the thickness of the OCA optical adhesive is increased. The OCA optical adhesive of the same series can be laminated and sliced ​​to achieve the effect of increasing the total thickness by forming a composite OCA optical adhesive with the first OCA optical adhesive 31 and the second OCA optical adhesive 32. This reduces the storage elastic modulus and softens the material, reducing deformation caused by high temperature, thereby avoiding deformation of the TFT glass 1 and further preventing the problem of whitening and uneven display caused by squeezing of liquid crystal in the TFT glass 1.

[0029] Furthermore, the thickness of the double-layer optical adhesive 3 is 375 μm-500 μm. That is, the thickness of the first OCA optical adhesive 31 and the second OCA optical adhesive 32 of the stacked slice are both 250 μm, or the thickness of the first OCA optical adhesive 31 is 250 μm and the thickness of the second OCA optical adhesive 32 is 125 μm. This increases the thickness of the double-layer optical adhesive 3.

[0030] Furthermore, when the purchase volume of the double-layer optical adhesive 3 is large, the thick OCA optical adhesive may also become a conventional standard OCA optical adhesive, that is, the first OCA optical adhesive 31 and the second OCA optical adhesive 32 can be integrally formed and shipped without being divided into two OCA optical adhesives.

[0031] Furthermore, the double-layer optical adhesive 3 is a colorless and transparent OCA optical adhesive to prevent the double-layer optical adhesive 3 from affecting the display of the TFT glass 1 .

[0032] Furthermore, the cover plate 2 is made of PMMA. The cover plate 2 made of PMMA is easily affected by high temperature. Therefore, this structure is most suitable for the cover plate 2 made of PMMA.

[0033] Furthermore, the TFT glass 1 includes a large piece of glass, a liquid crystal layer, and a small piece of glass stacked in sequence from bottom to top.

[0034] Example 2, please refer to Figure 1 The present invention also provides a vehicle-mounted display screen, which includes a liquid crystal display screen for avoiding glass deformation as described in any of the above items, and a backlight module 6 is provided below the TFT glass 1.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] Obviously, the embodiments described above are only some of the embodiments of the present application, rather than all of the embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. A liquid crystal display screen for preventing glass deformation, characterized in that: It includes: TFT glass, with an upper polarizer and a lower polarizer provided on its upper and lower surfaces respectively; a cover plate, which is arranged above the TFT glass; A double-layer optical adhesive includes a first OCA optical adhesive arranged on the lower surface of the cover plate and a second OCA optical adhesive arranged on the lower surface of the first OCA optical adhesive. The TFT glass and the cover plate are bonded together by the first OCA optical adhesive and the second OCA optical adhesive.

2. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The thickness of the double-layer optical adhesive is 375 μm-500 μm.

3. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The thickness of the first OCA optical adhesive and the second OCA optical adhesive are both 250 μm.

4. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The thickness of the first OCA optical adhesive is 250 μm, and the thickness of the second OCA optical adhesive is 125 μm.

5. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The first OCA optical adhesive and the second OCA optical adhesive are integrally formed.

6. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The double-layer optical adhesive is colorless and transparent OCA optical adhesive.

7. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The material of the cover plate is PMMA.

8. The liquid crystal display screen for preventing glass deformation according to claim 1, wherein: The TFT glass comprises a large piece of glass, a liquid crystal layer and a small piece of glass which are stacked in sequence from bottom to top.

9. A vehicle-mounted display screen, characterized in that: A liquid crystal display screen that avoids glass deformation as claimed in any one of claims 1 to 8.

10. The vehicle-mounted display screen according to claim 9, characterized in that: A backlight module is arranged below the TFT glass.

Images