CN212540967U

CN212540967U - Adhesive film for liquid crystal display

Info

Publication number: CN212540967U
Application number: CN202021664202.3U
Authority: CN
Inventors: 杜元生; 沈渊; 曹建; 何�泽; 吴晶晶; 徐宇
Original assignee: CCS (SHANGHAI) FUNCTIONAL FILMS INDUSTRY CO LTD
Current assignee: Kaixinsen (Shanghai) functional film industry Co.,Ltd.
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-02-12
Anticipated expiration: 2030-08-11

Abstract

The utility model relates to an optical film, and discloses a laminating film for a liquid crystal display, which comprises a first structural layer film and a second structural layer film which are sequentially arranged from top to bottom, wherein the first structural layer film comprises a first base film and a micro-convex structural layer arranged on the upper surface of the first base film; the second structure layer film comprises a second base film and a prism structure layer, and the prism structure layer is formed by continuously arranging first prisms and second prisms at intervals, wherein the width difference is formed at the bottom edge of the first prisms; the lower surface of the second base film is provided with an atomizing layer. The utility model discloses aThe brightness, the shielding property and the visual effect reach the standard, no interference and no glare exist, the integrated film only comprises two functional films and an atomizing layer, the whole thickness is lower and only 310um, the thinning is obvious, the cost can be reduced, and the cost is only 16.24 yuan/m²The production efficiency and the assembly efficiency are improved, the weight of the whole machine can be reduced, and the method is suitable for medium and small-sized machines at middle and low ends, and the reasonable utilization of resources is realized.

Description

Adhesive film for liquid crystal display

Technical Field

The utility model relates to an optical film especially relates to a laminating film for LCD.

Background

With the popularization of TFT-LCD liquid crystal display technology, the demand of backlight module and its related optical film is increasing, the former adopted diffuser plate, 90 degree light increasing, 0 degree light increasing and other 3 film frame is gradually replaced by 2, even 1 multilayer composite film, with the increasing size, the demand for stiffness becomes higher, the product is continuously thinned, and the demand for assembling film is becoming easier, DOP + D (diffusion sheet lamination light increasing + diffusion), POP + D (light increasing lamination light increasing + diffusion) and so on appear. In order to reduce the cost and ensure that the brightness meets the design requirements (non-redundant design), the industry hopes to have a multilayer optical membrane which can replace the diffusion plate, the intensifying plate and the diffusion plate, and can reduce the product selling price cost and the manual assembly cost (the multilayer membrane needs to be assembled by personnel for many times; the multilayer single-sheet composite membrane only needs to be assembled once) on the premise of ensuring the shielding property and the brightness.

At present, the invention is named as a three-structure layer diffusion-free plate type adhesive film for a liquid crystal display, and an invention patent application (hereinafter referred to as D1) with the patent application number of 201911280710.3 comprises a structure layer film, a second layer structure layer film and a third structure layer film which are sequentially arranged from top to bottom, thereby not only ensuring the brightness and the shielding property to achieve the effects of two intensifying plates and one diffusion plate, but also reducing the cost and the manual assembly cost in subsequent use, having no diffusion plate, having the thickness of about 460um and the cost of only 25 yuan/m²However, this product still has a high cost due to the use of an expensive mold (structural mold, high price), and also affects the production efficiency, and it adopts a three-layer structure layer film, still has a thick thickness, and is suitable for useIn high end products, resources cannot be reasonably allocated if installed in some lower end products.

Disclosure of Invention

An object of the utility model is to provide a laminating film for LCD, under the equal up to standard condition of performance such as luminance, shielding nature, thickness is thinner, and the cost is lower, can improve production efficiency and packaging efficiency, and be applicable to the middle and low end small-size model, realize the rational in infrastructure configuration.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

the laminating film for the liquid crystal display comprises a first structural layer film and a second structural layer film which are sequentially arranged from top to bottom, wherein the first structural layer film comprises a first base film and a micro-convex structural layer arranged on the upper surface of the first base film; the second structure layer film comprises a second base film and a prism structure layer, and the prism structure layer is formed by continuously arranging first prisms and second prisms at intervals, wherein the width difference is formed at the bottom edge of the first prisms; the lower surface of the second base film is provided with an atomizing layer.

Further, the base width L2 of the first prism is between 55-62um, and the base width L3 of the second prism is between 68-75 um.

Further, the base width L2 of the first prism is 60um, and the base width L3 of the second prism is 70 um.

Furthermore, the micro-convex structure layer is formed by continuously arranging a plurality of micro-convex structures, and the micro-convex structures are spherical crown structures.

Further, the micro-convex structures are continuously arranged in a honeycomb shape.

Furthermore, the atomized layer contains PBMA or PMMA micro-beads with the diameter of 2-5 microns.

Further, the thicknesses of the first base film and the second base film are both between 123-127 um.

The utility model discloses owing to adopted above technical scheme, have apparent technological effect:

this laminating film is guaranteeing that luminance reaches under the effect prerequisite of a intensifying and a diffusion basically, and the shielding nature reaches the liquid crystal display module assembly requirement, can with liquid crystal display panel glass direct contact, ensures that noninterference does not have and dazzles the light, sees the effect up to standard to the scratchproof satisfies the equipment demand, and the product stiffness can carry out attenuate and reduce cost to the structure under the condition that the requirement of jumbo size module assembly is satisfied.

The laminated film only comprises two functional films and an atomizing layer, the whole thickness is low and is only 310um, compared with the thickness of 460um of a D1 product, the thickness is remarkably reduced, and the cost can be reduced; the adhesive film is suitable for 43 inch or less liquid crystal display, and has a cost of only 16.24 yuan/m²And the cost of a structure assembled by a diffusion plate, a microlens film and a prism film is 26.62 yuan/m²The brightness, the shielding performance and the visual effect of the two films reach the standard, no interference and no glare exist, the cost of the adhesive film is lower, the thickness is thinner, only one layer is formed, the material cost is reduced, the production efficiency and the assembly efficiency are improved, the weight of the whole machine can be reduced, and the product grade is improved; the cost of D1 is 25 yuan/m²The laminating film is suitable for high-end occasions, can be suitable for middle and small-sized models at middle and low ends, achieves reasonable utilization of resources, is of a two-layer structure, has one less process, reduces one layer of PET and is lower in material cost compared with a three-layer structure layer of D1.

The second structure stratigraphic membrane is for improving luminance, ensure that luminance can satisfy the requirement of liquid crystal display laminating film, the base width L2 of first prism is 60um, the base width L3 of second prism is 70um, choose for use the great first prism of base width and the cooperation side by side of second prism in turn, can improve the light transmissivity, reach luminance maximize, and then ensure that the luminance of laminating film still can satisfy LCD's requirement under the prerequisite that reduces laminating film thickness and cost.

Drawings

Fig. 1 is an arrangement of a micro-convex structure according to an embodiment of the present invention;

fig. 2 is an arrangement of a micro-convex structure according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of the present invention.

The names of the parts indicated by the numerical references in the drawings are as follows: the structure comprises a film body, a film body and a base film, wherein the film body comprises 1-a first structure layer film, 2-a second structure layer film, 3-an atomizing layer, 4-a cementing layer, 11-a first base film, 12-a micro-convex structure, 21-a second base film, 22-a first prism, 23-a second prism, the height of an L-micro-convex structure, L1-center distance, L2-the width of the bottom edge of the first prism, and L3-the width of the bottom edge of the second prism.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

The utility model provides a laminating film for liquid crystal display, as shown in figure 3, including first structure rete 1, the second structure rete 2 that top-down set gradually.

The first structural layer film 1 includes a first base film 11 and a micro-convex structural layer disposed on an upper surface of the first base film 11. The first base film 11 is an optical-grade PET film, and has a thickness of 123-127um, and in this embodiment 125um is the best thickness. The micro-convex structure layer is formed by continuously arranging a plurality of micro-convex structures 12, the micro-convex structures 12 are spherical crown structures and are continuously arranged in a honeycomb shape, and the specific arrangement mode is as follows: the periphery of each micro-convex structure 12 is formed by arranging 6 micro-convex structures 12 at the same distance, the centers of the 6 micro-convex structures 12 arranged at the periphery of the same micro-convex structure 12 are positioned at the center of the same micro-convex structure 12, the center distance L1 between every two adjacent micro-convex structures 12 is 25-45um, the height L of each micro-convex structure is 10-20um, and the lower surface of the first base film 11 is provided with a cementing layer 4 for compounding with the second structure layer film 2. The micro-convex structure 12 has shielding property, and can improve brightness and shielding property. Two adjacent microprotrusion structures 12 may be attached as shown in fig. 1. Two adjacent microprotrusion structures 12 may also be separated as shown in FIG. 2.

The second structural layer 2 includes a second base film 21 and a prism structural layer, the second base layer is an optical-grade PET film, and the thickness thereof is between 123-127um, and 125um is the best thickness in this embodiment. The prism structure layer is formed by arranging a first prism 22 and a second prism 23 with width difference at the bottom edge at intervals. First prism 22 and second prism 23 are isosceles triangle structure, the base width L2 of first prism is between 55-62um, the base width L3 of second prism is between 68-75um, in this embodiment, in order to improve luminance, ensure that luminance can satisfy the requirement of LCD laminating film, the base width L2 of first prism is 60um, the base width L3 of second prism is 70um, choose the great first prism 22 of base width and the great cooperation of second prism 23 side by side in turn, can improve the light transmissivity, reach luminance maximize, and then ensure that the luminance of laminating film still can satisfy LCD's requirement under the prerequisite that reduces laminating film thickness and cost. The apex angle a of the first prism 22 and the second prism 23 is between 88-90 deg..

The lower surface of the second base film 21 is provided with an atomizing layer 3, the thickness of the atomizing layer 3 is 5-20um, the atomizing layer 3 contains 2-5 micron PBMA or PMMA micro beads, and the PMMA micro beads or PBMA micro beads enable the haze of the atomizing layer 3 to reach 95% -100% and the transmittance to reach 50-60%. The atomizing layer 3 has high shielding performance, can improve the brightness, plays the role of a diffusion plate, replaces the existing diffusion plate, further greatly reduces the thickness of the laminating film and the weight and the volume of the whole structure, and improves the product grade.

Because of the overall structure only adopts two-layer structure rete, in order to improve the luminance of laminating the membrane, the prism structure layer adopts first prism 22 and second prism 23 interval continuous arrangement that the base has the width difference to form, because of both are isosceles triangle, and the angle of apex angle A is between 88-90, consequently first prism 22 and second prism 23 can form certain difference in height when setting up on second base film 21, can adjust the light angle that gets into the prism structure layer, increase the luminance of laminating the membrane, reduce and interfere the line phenomenon.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.

Claims

1. The laminating film for the liquid crystal display is characterized by comprising a first structural layer film (1) and a second structural layer film (2) which are sequentially arranged from top to bottom, wherein the first structural layer film (1) comprises a first base film (11) and a micro-convex structural layer arranged on the upper surface of the first base film (11); the second structural layer film (2) comprises a second base film (21) and a prism structural layer, and the prism structural layer is formed by continuously arranging first prisms (22) and second prisms (23) with width differences at intervals on the bottom edges; the lower surface of the second base film (21) is provided with an atomizing layer (3).

2. The adhesive film for liquid crystal display according to claim 1, wherein the base width L2 of the first prism is between 55 to 62um, and the base width L3 of the second prism is between 68 to 75 um.

3. The adhesive film for liquid crystal display according to claim 1, wherein the base width L2 of the first prism is 60um, and the base width L3 of the second prism is 70 um.

4. The adhesive film for liquid crystal display according to claim 1, wherein the micro-convex structure layer is formed by continuously arranging a plurality of micro-convex structures (12), and the micro-convex structures (12) are spherical cap structures.

5. The adhesive film for liquid crystal display according to claim 4, wherein the micro-convex structures (12) are continuously arranged in a honeycomb shape.

6. The laminating film for liquid crystal display according to claim 1, characterized in that the atomized layer (3) contains 2-5 micron PBMA or PMMA micro-beads.

7. The adhesive film for liquid crystal display according to claim 1, wherein the thickness of the first base film (11) and the second base film is between 123-127 um.