Liquid crystal display panel capable of avoiding rainbow phenomenon

Abstract

The utility model discloses a kind of liquid crystal display screen to avoid appearing rainbow, it includes IML cover plate and TFT LCD module, TFT LCD module is set below IML cover plate, TFT LCD module is attached with IML cover plate by optical glue full bonding, the upper surface of TFT LCD module or the upper surface or lower surface of IML cover plate is attached with linear polarized light conversion sheet, linear polarized light conversion sheet can convert linear polarized light emitted by TFT LCD module into circular polarized light or natural light. Since the upper surface of TFT LCD module or the upper surface or lower surface of IML cover plate is attached with linear polarized light conversion sheet, linear polarized light conversion sheet can convert linear polarized light emitted by TFT LCD module into circular polarized light or natural light, such emitted light will not interfere due to phase difference problem before passing through solar polarized glasses, there will be no rainbow problem after passing through solar polarized glasses, to avoid IML cover plate appearing rainbow when user wears solar polarized glasses, to improve the quality of product, improve the competitiveness of product.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, and more specifically, to a liquid crystal display screen that avoids the appearance of rainbow patterns. Background Technology

[0002] IML (In Molding Label) is an injection molding process that uses printed ink sandwiched between a transparent film and a plastic layer to create a wear-resistant and scratch-resistant surface.

[0003] IML (In-line Molding Material) offers advantages over glass covers for full lamination in automotive interiors, including lighter weight and impact resistance. It is also easier to achieve various shapes and can be integrated with structural components such as screw holes. However, it is prone to deformation and scratches, and a rainbow effect can occur when users view the LCD screen while wearing polarized sunglasses.

[0004] The mechanism behind the rainbow-like color banding is that the IML cover plate and the TFT LCD module are typically fully bonded together using optical adhesive. The TFT LCD module emits linearly polarized light. The IML cover plate may have residual stress from injection molding, or from the full bonding process or assembly with the backlight module. This residual stress may exist throughout the entire IML cover plate or in localized areas. Optically, this residual stress can be translated into inconsistent refractive index coefficients at different angles along the thickness direction of the IML cover plate. When the linearly polarized light emitted from the TFT LCD module passes through the IML cover plate, the inconsistent refractive index coefficients at these angles result in inconsistent light propagation speeds, creating a phase difference. This phase difference, Δφ = 2πΔnd / λ, where Δn is the refractive index difference, d is the thickness of the IML cover plate, and λ is the wavelength of the light.

[0005] The human eye is not sensitive to the polarization state of light. When a person wears polarized sunglasses, light rays emitted from different angles interfere due to phase differences. This phase difference is related to the wavelength of the light. When this interfering, wavelength-dependent light is projected onto the polarized sunglasses, it forms rainbow-colored bands, or rainbow patterns. These rainbow bands shift as the viewing angle changes because the phase difference (Δn) also changes with the viewing angle. Utility Model Content

[0006] The technical problem this invention aims to solve is how to prevent rainbow patterns from appearing on the IML cover plate when the user wears polarized sunglasses.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution: To solve the above-mentioned technical problems, this utility model provides a liquid crystal display screen that avoids rainbow patterns. It includes an IML cover plate and a TFT LCD module. The TFT LCD module is disposed below the IML cover plate. The TFT LCD module and the IML cover plate are fully bonded together by optical adhesive. A linear polarizer is attached to the upper surface of the TFT LCD module or the upper or lower surface of the IML cover plate. The linear polarizer can convert the linearly polarized light emitted from the TFT LCD module into circularly polarized light or natural light.

[0008] In a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet is attached to the upper surface of the TFT LCD module.

[0009] In a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet is attached to the upper surface of the IML cover plate.

[0010] In a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet is attached to the lower surface of the IML cover plate.

[0011] As a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet is a 1 / 4 TAC glass sheet.

[0012] As a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizer is a high-delay SRF film.

[0013] As a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet completely covers the surface of the IML cover plate.

[0014] In a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the angle between the fast axis of the 1 / 4 TAC glass slide and the polarization angle of the linearly polarized light is 45°.

[0015] As a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet covers the AA area of ​​the TFT LCD module and extends beyond the single edge of the AA area by at least 0.2 mm.

[0016] As a preferred embodiment of the liquid crystal display screen that avoids rainbow patterns provided by this utility model, the linear polarizing conversion sheet covers the AA area of ​​the TFT LCD module and extends beyond the single edge of the AA area by 0.2mm to 10mm.

[0017] This utility model has the following beneficial effects: Because a linear polarization conversion film is attached to the upper surface of the TFT LCD module or the upper or lower surface of the IML cover plate, the linear polarization conversion film can convert the linearly polarized light emitted from the TFT LCD module into circularly polarized light or natural light. Such emitted light will not interfere due to phase difference issues before passing through the sunglasses, and there will be no rainbow pattern after passing through the sunglasses. This avoids the rainbow pattern appearing on the IML cover plate when the user wears sunglasses, thereby improving product quality and enhancing product competitiveness. Attached Figure Description

[0018] To more clearly illustrate the solutions in this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a liquid crystal display screen that avoids rainbow patterns, as provided in Embodiment 1.

[0020] Figure 2 This is a schematic diagram of the structure of a liquid crystal display screen that avoids rainbow patterns, as provided in Embodiment 2.

[0021] Figure 3 This is a schematic diagram of the structure of a liquid crystal display screen that avoids rainbow patterns, as provided in Example 3.

[0022] Explanation of icon numbers: 1. IML cover plate; 2. TFT LCD module; 3. Optical adhesive; 4. Linear polarizer conversion film. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] 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 indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] This utility model provides a liquid crystal display screen that avoids rainbow patterns, which includes an IML cover plate and a TFT LCD module. The TFT LCD module is disposed below the IML cover plate and is fully bonded to the IML cover plate with optical adhesive. A linear polarizer is attached to the upper surface of the TFT LCD module or the upper or lower surface of the IML cover plate. The linear polarizer can convert the linearly polarized light emitted from the TFT LCD module into circularly polarized light or natural light.

[0027] Because a linear polarization conversion film is attached to the upper surface of the TFT LCD module or the upper or lower surface of the IML cover plate, the linear polarization conversion film can convert the linearly polarized light emitted from the TFT LCD module into circularly polarized light or natural light. Such emitted light will not interfere due to phase difference issues before passing through the sunglasses, and there will be no rainbow pattern after passing through the sunglasses. This avoids the rainbow pattern appearing on the IML cover plate when the user wears sunglasses, thereby improving product quality and enhancing product competitiveness.

[0028] 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 with reference to the accompanying drawings. The present invention will be described in detail below with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] Example 1, please refer to Figure 1 This invention provides a liquid crystal display screen that avoids rainbow patterns. It includes an IML cover plate 1 and a TFT LCD module 2. The TFT LCD module 2 is positioned below the IML cover plate 1 and is fully bonded to the IML cover plate 1 using optical adhesive 3. A linear polarizer 4 is attached to the upper surface of the TFT LCD module 2, converting the linearly polarized light emitted from the TFT LCD module 2 into circularly polarized light or natural light. Because the linear polarizer 4 is attached to the upper surface of the TFT LCD module 2 or the upper or lower surface of the IML cover plate 1, it converts the linearly polarized light emitted from the TFT LCD module 2 into circularly polarized light or natural light. This emitted light will not interfere due to phase difference issues before passing through sunglasses, thus preventing rainbow patterns. This avoids rainbow patterns appearing on the IML cover plate when the user wears sunglasses, thereby improving product quality and enhancing product competitiveness.

[0030] Example 2, please refer to Figure 2 As a further optimization of Embodiment 1, the difference between it and Embodiment 1 is that in this embodiment, the linear polarization conversion sheet 4 is attached to the lower surface of the IML cover plate 1.

[0031] The linear polarizer 4 is attached to the upper surface of the TFT LCD module 2 or to the lower surface of the IML cover plate 1. The linear polarizer 4 covers the AA area of ​​the TFT LCD module 2 and extends beyond the edge of the AA area by at least 0.2 mm. More specifically, the linear polarizer 4 covers the AA area of ​​the TFT LCD module 2 and extends beyond the edge of the AA area by 0.2 mm to 10 mm.

[0032] Example 3, please refer to Figure 3 As a further optimization of Embodiment 1, the difference between it and Embodiment 1 is that in this embodiment, the linear polarizing conversion sheet 4 is attached to the upper surface of the IML cover plate 1, and the linear polarizing conversion sheet 4 completely covers the surface of the IML cover plate 1. It must be attached to the entire area, including the black ink area.

[0033] Furthermore, the linear polarizer conversion sheet 4 is a 1 / 4 TAC glass slide, and the angle between the fast axis of the 1 / 4 TAC glass slide and the polarization angle of the linearly polarized light is 45°. In other embodiments, the linear polarizer conversion sheet 4 is a high-retardation SRF film, and the SRF film does not have an attachment angle problem.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A liquid crystal display screen that avoids rainbow patterns, characterized in that, It includes an IML cover plate and a TFT LCD module. The TFT LCD module is located below the IML cover plate and is fully bonded to the IML cover plate with optical adhesive. A linear polarizer is attached to the upper surface of the TFT LCD module or the upper or lower surface of the IML cover plate. The linear polarizer can convert the linearly polarized light emitted from the TFT LCD module into circularly polarized light or natural light.

2. The liquid crystal display screen for avoiding rainbow patterns according to claim 1, characterized in that, The linear polarization conversion film is attached to the upper surface of the TFT LCD module.

3. The liquid crystal display screen for avoiding rainbow patterns according to claim 1, characterized in that, The linear polarizing conversion film is attached to the upper surface of the IML cover plate.

4. The liquid crystal display screen for avoiding rainbow patterns according to claim 1, characterized in that, The linear polarizing conversion film is attached to the lower surface of the IML cover plate.

5. The liquid crystal display screen for avoiding rainbow patterns according to claim 1, characterized in that, The linear polarization conversion sheet is a 1 / 4 TAC glass slide.

6. The liquid crystal display screen for avoiding rainbow patterns according to claim 1, characterized in that, The linear polarizer is a high-delay SRF film.

7. The liquid crystal display screen for avoiding rainbow patterns according to claim 3, characterized in that, The linear polarizing conversion film completely covers the surface of the IML cover plate.

8. The liquid crystal display screen for avoiding rainbow patterns according to claim 5, characterized in that, The angle between the fast axis of the 1 / 4 TAC glass slide and the polarization angle of the linearly polarized light is 45°.

9. The liquid crystal display screen for avoiding rainbow patterns according to claim 2 or 4, characterized in that, The linear polarizing conversion film covers the AA area of ​​the TFT LCD module and extends beyond one edge of the AA area by at least 0.2 mm.

10. The liquid crystal display screen for avoiding rainbow patterns according to claim 9, characterized in that, The linear polarizing conversion film covers the AA area of ​​the TFT LCD module and extends beyond the single edge of the AA area by 0.2 mm to 10 mm.

Images