Low-reflection polaroid and display module

Abstract

The utility model relates to a low-reflection polaroid and a display module. The low-reflection polaroid comprises a first release film, a low-reflection film, a first TAC layer, a PVA layer, a second TAC layer, a first PSA layer and a second release film which are stacked in sequence. The low-reflection film is bonded and fixed with the first TAC layer; and the first TAC layer, the PVA layer and the second TAC layer are sequentially pressed and fixed. According to the low-reflection polaroid provided by the utility model, the low-reflection film is arranged, and the strong capability of reducing reflected light of the gadolinium oxide film is utilized, so that the visual effect is improved. When the low-reflection polaroid is applied to a liquid crystal display module, especially in the application of a vehicle-mounted display screen, the requirements of the display screen on the aspects of display effect, low reflection, high brightness, color and display definition can be met, and the user experience feeling is improved.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a low-reflection polarizer and display module. Background Technology

[0002] The liquid crystal display module (LCM) is the core component of liquid crystal display technology, responsible for displaying images and information. It mainly consists of a metal frame, a FOG (FPC on glass) module, and a backlight. The FOG module typically comprises two layers of glass and two layers of polarizers. To improve the protection, aesthetics, and functionality of the display, a cover plate or a TP (touchscreen) is usually added to the surface of the LCM. The cover plate primarily serves a protective function, preventing scratches or impacts to the display; while the TP provides touch functionality, allowing users to operate the device by touching the screen.

[0003] In the field of automotive display technology, when LCD display modules have a cover plate or touch panel (TP), an AG (anti-glare), AR (anti-reflective), or AF (anti-fingerprint) optical film is typically applied to the surface of the cover plate or TP. When ambient light is strong, the display has low reflectivity, which does not affect the driver's viewing experience. Due to various limitations, not all LCD display module products have a cover plate or TP. In this case, the human eye directly views the surface of the upper polarizer of the display module. However, conventional polarizers have low reflectivity, and when ambient light is strong, the driver may experience discomfort due to glare when viewing the display, resulting in a poor viewing experience. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a low-reflection polarizer and display module to reduce screen reflection and avoid visual fatigue.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A low-reflection polarizer includes a first release film, a low-reflection film, a first TAC layer, a PVA layer, a second TAC layer, a first PSA layer, and a second release film stacked sequentially.

[0007] The low-reflection film is bonded and fixed to the first TAC layer;

[0008] The first TAC layer, the PVA layer, and the second TAC layer are sequentially pressed and fixed together.

[0009] The further technical solution is as follows:

[0010] The low-reflection film comprises a gadolinium oxide film layer, a PET substrate, and a second PSA layer stacked sequentially, with the gadolinium oxide film layer located on the side away from the first TAC layer.

[0011] The gadolinium oxide film has a thickness of 30 μm.

[0012] The PET substrate has a thickness of 15 μm.

[0013] The low-reflection film has a thickness of 60 μm.

[0014] The thickness of the first TAC layer is 25–40 μm; the thickness of the second TAC layer is 25–40 μm.

[0015] The thickness of the PVA layer is 12 μm.

[0016] The thickness of the low-reflection polarizer is 347µm to 377µm.

[0017] This utility model also provides a display module, including a liquid crystal display module and a backlight. The liquid crystal display module includes an upper polarizer, a CF glass, a TFT glass and a lower polarizer arranged in sequence. The upper polarizer is the low-reflection polarizer, and the low-reflection polarizer is bonded and fixed to the CF glass through the first PSA layer thereon.

[0018] The further technical solution is as follows:

[0019] It also includes the front frame, the middle frame, and the rear frame;

[0020] The middle frame is mounted on the rear iron frame, forming a fixed structure that supports and protects the backlight light guide module.

[0021] The front iron frame is disposed on the middle rubber frame to form a fixing structure for fixing the liquid crystal display module;

[0022] The lower polarizer of the liquid crystal display module is connected to the middle frame via double-sided adhesive foam.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention relates to a low-reflection polarizer. By incorporating a low-reflection film and utilizing the strong light-reflection reduction capability of gadolinium oxide film, it enhances visual performance. When used in LCD modules, particularly in automotive displays, this low-reflection polarizer can meet the display's requirements for display quality, low reflection, high brightness, color accuracy, and clarity, thereby improving user experience and product competitiveness.

[0025] Other features and advantages of this invention will be set forth in the following description or may be learned by practicing this invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the low-reflection polarizer in Embodiment 1 of this utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the low-reflection film in Embodiment 1 of this utility model.

[0028] Figure 3 This is a cross-sectional view of the display module in Embodiment 2 of this utility model.

[0029] In the diagram: 1. First release film; 2. Low-reflection film; 3. First TAC layer; 4. PVA layer; 5. Second TAC layer; 6. First PSA layer; 7. Second release film; 8. Front frame; 9. Upper polarizer; 10. CF glass; 11. TFT glass; 12. Lower polarizer; 13. Middle frame; 14. Rear frame; 15. Light guide module; 16. Double-sided adhesive foam; 21. Gadolinium oxide film layer; 22. PET substrate; 23. Second PSA layer. Detailed Implementation

[0030] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0031] Example 1

[0032] like Figure 1 As shown, the low-reflection polarizer of this embodiment includes a first release film 1, a low-reflection film 2, a first TAC (triacetyl cellulose acetate) layer 3, a PVA (polyvinyl alcohol) layer 4, a second TAC layer 5, a first PSA (pressure-sensitive adhesive) layer 6, and a second release film 7, which are stacked sequentially.

[0033] The low-reflection film 2 is bonded and fixed to the first TAC layer 3;

[0034] The first TAC layer 3, PVA layer 4, and second TAC layer 5 are sequentially pressed and fixed together.

[0035] This embodiment reduces the light reflection capability of the polarizer by setting a low-reflection film 2, thereby improving the visual effect. Using this low-reflection polarizer in a liquid crystal display module can enhance the user experience.

[0036] The TAC layer primarily serves to isolate moisture and air, protecting the PVA layer from damage and thus maintaining the polarizing performance, transmittance, hue, and optical durability of the polarizer. The PVA layer, also known as the polarizing film, is the main component of the polarizer. It determines the polarizing performance and transmittance of the polarizer and is also a major factor affecting its hue and optical durability. Furthermore, PVA is a hydrolysis product of polyvinyl acetate and possesses excellent film-forming properties, a colorless and transparent film, oil resistance, organic solvent resistance, and stability against bacteria and sunlight.

[0037] like Figure 2 As shown, in a preferred embodiment, the low-reflection film 2 includes a gadolinium oxide film layer 21, a PET (polyethylene terephthalate) substrate 22 and a second PSA layer 23 stacked sequentially, with the gadolinium oxide film layer 21 located on the side away from the first TAC layer 3.

[0038] Gadolinium oxide, with its high refractive index, exhibits excellent antireflection properties across a wide spectral range. Gadolinium oxide films demonstrate good thermal and chemical stability, remaining stable even under high temperatures and harsh chemical environments, and are not prone to deterioration or peeling, thus extending the lifespan of the low-reflection film. By precisely controlling the thickness and refractive index of the gadolinium oxide film, light reflection at the film surface can be further reduced, improving light transmittance and image quality.

[0039] The gadolinium oxide film layer 21 can be applied to the PET substrate 22 through processes such as coating or deposition. The PET substrate 22 has excellent light transmittance and low refractive index, which can reduce the reflection and scattering of light inside the substrate, thereby improving the overall optical performance of the low-reflection film.

[0040] As a preferred embodiment, the thickness of the low-reflection film 2 is 60 μm.

[0041] The thickness of the gadolinium oxide film layer 21 is preferably 30 μm.

[0042] The thickness of the PET substrate 22 is preferably 15 μm.

[0043] The thickness of the second PSA layer 23 is preferably 15 μm.

[0044] As a preferred approach, the thickness of the entire low-reflection polarizer is 347µm to 377µm.

[0045] The thickness of the first release film 1 is preferably 100 μm.

[0046] The thickness of the first TAC layer 3 is preferably 25–40 μm.

[0047] The thickness of PVA layer 4 is preferably 12 μm.

[0048] The thickness of the second TAC layer 5 is preferably 25–40 μm.

[0049] The thickness of the first PSA layer 6 is preferably 5 μm.

[0050] The thickness of the second release film 7 is preferably 100 μm.

[0051] The thickness of each layer of material can be selected according to actual needs.

[0052] Example 2

[0053] See Figure 3A display module according to this embodiment includes a liquid crystal display module and a backlight. The liquid crystal display module includes an upper polarizer 9, a CF glass (color filter glass) 10, a TFT glass 11 and a lower polarizer 12 arranged in sequence, wherein the upper polarizer 9 is the low-reflection polarizer described in Embodiment 1.

[0054] During assembly, the first release film 1 and the second release film 7 are removed and bonded to the CF glass 10 through the first PSA layer 6 on them.

[0055] The display module in this embodiment also includes a front frame 8, a middle frame 13, and a rear frame 14. The middle frame 13 is disposed on the rear frame 14, forming a fixed structure that supports and protects the backlight guide module 15. The front frame 8 is disposed on the middle frame 13, forming a fixed structure for fixing the liquid crystal display module. The lower polarizer 12 of the liquid crystal display module is connected to the middle frame 13 via double-sided adhesive foam 16.

[0056] The rear frame is a crucial support structure in the display backlight module, typically located at the rear of the module, serving to secure and protect the internal components. The rear frame is generally made of metal, such as iron or alloys, to provide sufficient strength and stability. Its shape and size are usually matched to the overall design of the backlight module to ensure its aesthetics and stability. The front frame, often called the LCD module frame (LCM frame) or display module frame, is an important component of the display module. The display FPC is bonded to the LCD module. The middle frame plays a vital role in supporting, securing, and protecting optical components in the backlight, meeting the backlight's requirements for stability and durability. The middle frame can be made of elastic materials such as plastic or rubber, possessing flexibility and malleability.

[0057] The front metal frame and the middle rubber frame can be connected by snap-fit.

[0058] The rear metal frame and the middle rubber frame can be connected by snap-fit, screws, or other methods to meet the backlight's requirements for connection strength and stability.

[0059] An interference fit can be used between the front iron frame and the rear iron frame.

[0060] The light guide module 15 includes a light guide plate, a reflective film, a diffusion film, a brightness enhancement film, etc., which are conventional components. Their specific structure and function will not be described in detail.

[0061] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-reflection polarizer, characterized in that, It includes a first release film (1), a low-reflection film (2), a first TAC layer (3), a PVA layer (4), a second TAC layer (5), a first PSA layer (6), and a second release film (7) stacked in sequence; The low-reflection film (2) is bonded and fixed to the first TAC layer (3); The first TAC layer (3), the PVA layer (4), and the second TAC layer (5) are sequentially pressed and fixed together.

2. The low-reflection polarizer according to claim 1, characterized in that, The low-reflection film (2) includes a gadolinium oxide film layer (21), a PET substrate (22), and a second PSA layer (23) stacked sequentially, with the gadolinium oxide film layer (21) located on the side away from the first TAC layer (3).

3. The low-reflection polarizer according to claim 2, characterized in that, The gadolinium oxide film (21) has a thickness of 30 μm.

4. The low-reflection polarizer according to claim 2, characterized in that, The PET substrate (22) has a thickness of 15 μm.

5. The low-reflection polarizer according to claim 1, characterized in that, The low-reflection film (2) has a thickness of 60 μm.

6. The low-reflection polarizer according to claim 1, characterized in that, The first TAC layer (3) has a thickness of 25-40 μm; the second TAC layer (5) has a thickness of 25-40 μm.

7. The low-reflection polarizer according to claim 1, characterized in that, The thickness of the PVA layer (4) is 12 μm.

8. The low-reflection polarizer according to claim 1, characterized in that, The thickness of the low-reflection polarizer is 347µm to 377µm.

9. A display module, comprising a liquid crystal display module and a backlight, wherein the liquid crystal display module comprises an upper polarizer (9), a CF glass (10), a TFT glass (11), and a lower polarizer (12) arranged sequentially, characterized in that, The upper polarizer (9) is a low-reflection polarizer according to any one of claims 1 to 8, and the low-reflection polarizer is bonded and fixed to the CF glass (10) through the first PSA layer (6) thereon.

10. The display module according to claim 9, characterized in that, It also includes the front iron frame (8), the middle rubber frame (13) and the rear iron frame (14); The middle frame (13) is disposed on the rear iron frame (14) to form a fixed structure that supports and protects the backlight light guide module (15); The front iron frame (8) is disposed on the middle rubber frame (13) to form a fixed structure for fixing the liquid crystal display module; The lower polarizer (12) of the liquid crystal display module is connected to the middle frame (13) via double-sided adhesive foam (16).

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