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Diffusion and brightness enhancement film and method for manufacturing same

A manufacturing method and diffusion membrane technology, applied in the direction of chemical instruments and methods, instruments, layered products, etc., can solve the problems of poor thermal stability, absorption, folding, etc., to reduce the number of membranes used, reduce manufacturing costs, and improve product quality. quality effect

Inactive Publication Date: 2013-09-11
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The use of toxic solvents affects the environment;
[0009] 2. The process is cumbersome and there are many defects. The finished product has white lines, folds, scratches, and poor thermal stability;
[0010] 3. Applying multiple optical films to the backlight module at the same time has disadvantages such as interference, scattering, and absorption;
[0011] 4. Use a variety of optical films to increase costs

Method used

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  • Diffusion and brightness enhancement film and method for manufacturing same
  • Diffusion and brightness enhancement film and method for manufacturing same
  • Diffusion and brightness enhancement film and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] According to the following ingredients by weight percentage: PET88%, polyethylene 6%, ethylene-ethyl methacrylate-glycidyl methacrylate triblock copolymer 6%;

[0074] Put the ingredients into the twin-screw extruder, melt at 275°C, vacuum pump, pass through the melt filter, metering pump, melt pipe and die to form a melt film, the die temperature is 280°C, the melt film Cool the surface of the chilled roll at 35°C to form a thick film;

[0075] The film is preheated at 95°C, stretched longitudinally at 100°C, the stretching ratio is 3 times, and cooled at 25°C to obtain a unidirectional longitudinally stretched film;

[0076] The film is preheated at 100°C, stretched transversely at 120°C, the stretching ratio is 3.5 times, heat-set at 230°C, and relax 6% in the width direction;

[0077] On one surface of the light-diffusing film, a photosensitive composition (82% high-refractive-index acrylic acid, 12% 2-phenylethyl methacrylate, 3% acrylate-1,6-hexanediol, and photo...

Embodiment 2

[0079] The raw materials of the diffusion layer are configured according to the following weight percentages: PET79%, colloidal silicon dioxide 10%, ethylene-ethyl methacrylate-glycidyl methacrylate triblock copolymer 6%, polyethylene 5%; support layer Raw material: PET100%. The manufacturing method is the same as that of Example 1, and the structure of the diffused brightening film can be found in figure 2 or image 3 .

Embodiment 3

[0081] Diffusion layer raw materials are configured according to the following weight percentages: PET90%, silicon dioxide 7%, acrylic particles 3%; supporting layer raw materials: PET100%. The manufacturing method is the same as that of Example 1, and the structure of the diffused brightening film can be found in Figure 4 or Figure 5 .

[0082] The diffusion brightening film provided by the invention and its manufacturing method adopt processes such as blending, melt extrusion, casting, biaxial stretching, heat setting, cooling, etc., and the diffusion particles are uniformly dispersed in the base resin to prepare a thermally stable film. For a good diffusion film, the diffusion film passes through a light curing molding machine to solidify and form a microstructure on the surface.

[0083]The present invention effectively integrates the existing mature molding process, combines the diffusion film and the brightness enhancement film together for manufacture, does not use ...

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Abstract

The invention discloses a diffusion and brightness enhancement film and a method for manufacturing the same. The diffusion and brightness enhancement film comprises a diffusion film and a brightness enhancement layer. The brightness enhancement layer is positioned on the diffusion film, the diffusion film comprises one or a plurality of diffusion layers, each diffusion layer comprises a resin base material and light diffusing agents uniformly dispersed in the resin base material, an absolute value of the difference between a refractive index of each light diffusing agent and a refractive index of each resin base material ranges from 0.01 to 0.4, and the brightness enhancement layer comprises a plurality of microstructures which are arranged according to a linear structure or a nonlinear structure. The diffusion and brightness enhancement film and the method have the advantages that the diffusion and brightness enhancement film is manufactured by a novel process, various toxic solvents are omitted, and shortcomings of white stripes, folding, scratching, poor thermal stability and the like of a finished product are overcome; the brightness enhancement layer is compounded on the surface of the corresponding diffusion layer, and working procedures are simple; after the multifunctional optical film is applied to a backlight module, the service quantity of diaphragms can be reduced, and shortcomings of interference, scattering, absorption and the like when various diaphragms are used simultaneously can be overcome; the manufacturing cost of the diffusion and brightness enhancement film is reduced, and the quality of the diffusion and brightness enhancement film is improved.

Description

technical field [0001] The invention relates to the technical field of optical films, in particular to a diffusion brightening film and a manufacturing method thereof. Background technique [0002] Liquid crystal display (LCD) has the advantages of low radiation, low energy and environmental protection, and soft picture, and has become the most widely used display device in the digital age today. The LCD panel itself does not have a light-emitting display function, and must rely on a backlight module. The performance of the backlight module not only directly affects the color and quality of LCD images, but also affects the thickness and energy consumption of the LCD. Therefore, the backlight module is one of the key components in the LCD and plays a role in the entire LCD. Role. [0003] The backlight module is composed of light source, reflective film, light guide plate, diffusion film, brightness enhancement film and outer frame. The preparation of the above-mentioned o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02B1/04B29C69/00B29C47/00B29C55/14B29C59/04B32B27/36
Inventor 仇植宋厚春吴智华
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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