Circularly polarizing plate for LCD

Abstract

The utility model discloses a kind of circular polarizer for LCD, including from lower to upper sequentially arranged release film layer, first PSA glue layer, compensating film layer, PVA layer, 1 / 4 film material layer, second PSA glue layer, film material layer with coating and protective film layer;Wherein, the material quality of film material layer with coating is one of HC, AG, AGLR or LR, and substrate is one of TAC, PMMA or PET;The material quality of 1 / 4 film material layer is one of TAC, PMMA, PET or COP;The material quality of compensating film layer is one of TAC or COP;The component of first PSA glue layer and second PSA glue layer includes acrylic material quality.The utility model processing procedure is simple, allows user to clearly see display content also under the condition of wearing polarized sunglasses, can effectively improve the visibility of display device and reduce glare.

Description

Technical Field

[0001] This utility model relates to the field of polarizer technology, and in particular to a circular polarizer for LCDs suitable for outdoor display. Background Technology

[0002] Current LCD polarizers typically only achieve linear polarization, filtering out light from only one direction. When used in outdoor billboards, navigation systems, and other display devices requiring outdoor use under strong sunlight, users wearing polarized sunglasses cannot see the displayed image, severely limiting the application scenarios of LCD panels.

[0003] Chinese patent document CN 216670314 U, entitled "A Circular Polarizing Film for Outdoor Displays," solves the problem of traditional polarizing films' inability to achieve circular polarization by using a combination of polyethylene terephthalate (PET) substrate and liquid crystal layer in the polarizing film, along with an anti-glare, low-reflection surface treatment layer and a polyvinyl alcohol (PVA) film. This achieves a clear display effect even when wearing polarized sunglasses and is applicable to various panel types. The core component of this patent document for achieving the circular polarizing effect is a liquid crystal layer with a quarter-wave plate effect, which is coated on a PET substrate and then bonded to PVA with UV adhesive. This implementation method is technically challenging, requiring equipment equipped with a UV adhesive device, making it a high-barrier-to-entry technology. Utility Model Content

[0004] The main objective of this invention is to provide a circular polarizing film for LCDs that has a simple processing procedure and allows users to clearly see the displayed content even when wearing polarized sunglasses.

[0005] To achieve the above objectives, this utility model proposes a circular polarizer for LCDs, comprising, from bottom to top, a release film layer, a first PSA adhesive layer, a compensation film layer, a PVA layer, a 1 / 4 film material layer, a second PSA adhesive layer, a coated film material layer, and a protective film layer.

[0006] The coated membrane layer is made of one of HC, AG, AGLR or LR, and the substrate is one of TAC, PMMA or PET.

[0007] The material of the 1 / 4 membrane layer is one of TAC, PMMA, PET or COP;

[0008] The material of the compensation membrane layer is either TAC or COP.

[0009] The first PSA adhesive layer and the second PSA adhesive layer are composed of acrylic materials;

[0010] A further technical solution of this utility model is that the thickness of the coated film layer is 20-85 μm.

[0011] A further technical solution of this utility model is that the thickness of the first PSA adhesive layer and the second PSA adhesive layer is 5-10 μm.

[0012] A further technical solution of this utility model is that the optical axis angle of the 1 / 4 film layer is obliquely 45°.

[0013] The circular polarizer for LCDs of this invention has a simple processing procedure, which can be met by existing conventional polarizer processing equipment without the need for equipment modification, thus effectively increasing its market share. Furthermore, this invention allows users to clearly see the displayed content even when wearing polarized sunglasses, effectively improving the visibility of the display device and reducing glare. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the circular polarizer for LCDs of this utility model.

[0016] Explanation of icon numbers:

[0017] Release film layer 1, first PSA adhesive layer 2, compensation film layer 3, PVA layer 4, 1 / 4 film material layer 5, coated film material layer 6; second PSA adhesive layer 7; protective film layer 8.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "length", "width", "thickness", "front", "rear", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] This utility model proposes a circular polarizer for LCDs, such as... Figure 1 As shown, a preferred embodiment of the circular polarizer for LCD of this utility model includes, from bottom to top, a release film layer 1, a first PSA adhesive layer 2, a compensation film layer 3, a PVA layer 4, a 1 / 4 film layer 5, a second PSA adhesive layer 6, a coated film layer 7, and a protective film layer 8.

[0022] The coated membrane layer 7 is made of one of HC, AG, AGLR, or LR materials, and the substrate is one of TAC, PMMA, or PET. The thickness of the coated membrane layer 7 is 20–85 μm.

[0023] The 1 / 4 membrane layer 5 is made of one of TAC, PMMA, PET, or COP. The optical axis angle of the 1 / 4 membrane layer 5 is 45°.

[0024] The compensation film layer 3 is made of either TAC or COP, and the compensation value is set according to the requirements of the LCD panel.

[0025] The first PSA adhesive layer 2 and the second PSA adhesive layer 6 are composed of acrylic materials. The thickness of the first PSA adhesive layer 2 and the second PSA adhesive layer 6 is 5-10 μm.

[0026] The processing flow of the circular polarizer for LCD of this utility model is as follows:

[0027] First, the PVA layer 4 is stretched using a wet method, and then bonded to the compensation film layer 3 and the 1 / 4 film layer 5 with water-based adhesive or UV adhesive. The coated film layer 7 is then bonded to the surface of the 1 / 4 film layer 5 through the second PSA adhesive layer 6. The protective film layer 8, which provides protection, is then bonded to the surface of the coated film layer 7. Finally, the supplementary film layer is bonded to the release film layer 1 coated with the second PSA adhesive layer 6.

[0028] The circular polarizer for LCDs of this invention has a simple processing procedure, which can be met by existing conventional polarizer processing equipment without the need for equipment modification, thus effectively increasing its market share. Furthermore, this invention allows users to clearly see the displayed content even when wearing polarized sunglasses, effectively improving the visibility of the display device and reducing glare.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A circular polarizer for LCDs, characterized in that, It includes, from bottom to top, a release film layer, a first PSA adhesive layer, a compensation film layer, a PVA layer, a 1 / 4 film material layer, a second PSA adhesive layer, a coated film material layer, and a protective film layer; The coated membrane layer is made of one of HC, AG, AGLR or LR, and the substrate is one of TAC, PMMA or PET. The material of the 1 / 4 membrane layer is one of TAC, PMMA, PET or COP; The material of the compensation film layer is either TAC or COP; The first PSA adhesive layer and the second PSA adhesive layer are composed of acrylic materials.

2. The circular polarizer for LCD according to claim 1, characterized in that, The thickness of the coated membrane layer is 20~85μm.

3. The circular polarizer for LCD according to claim 2, characterized in that, The thickness of the first PSA adhesive layer and the second PSA adhesive layer is 5~10μm.

4. The circular polarizer for LCD according to claim 3, characterized in that, The optical axis angle of the 1 / 4 membrane layer is 45° obliquely.

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