Prism film, and preparation method and apparatus thereof

Abstract

The invention provides a prism film, and a preparation method and apparatus thereof. The prism film comprises a base material. The base material is provided with prism protrusions formed by a photosensitive resist. The at least two prism protrusions have different heights. According to the invention, the prism film is prepared by using laser interference lithography so that the advantages include simplicity, rapidness and low cost; and the modulation depth of the surface of the prepared prism film is randomly distributed, the prism direction and period can be conveniently adjusted, and the problems of image display such as film material adhesion, Moire patterns and the like between the prism film and other film materials or a liquid crystal panel can be effectively solved.

Description

technical field [0001] The invention relates to the field of liquid crystal display, in particular to a prism film and a preparation method and device thereof. Background technique [0002] like figure 1 as shown, figure 1 It shows the structure of the backlight in the liquid crystal display module. The backlight includes a liquid crystal panel 1, a protective film 2, an upper prism film 3, a lower prism film 4, a diffusion film 5, a light guide plate 6, and a bottom reflector from top to bottom. sheet 8, light source 9 located on at least one side of the light guide plate 6, and lamp reflector 10 located outside the light source 9; dots 7 are arranged on the bottom surface of the light guide plate 6. Wherein, the protective film 2 may not be required in some backlight sources. The above-mentioned film materials in the backlight structure can be combined and matched arbitrarily, and the backlight can also be used in other display devices, such as electronic paper, etc., a...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned prism film processing technology are: 1. The wheel engraved with prism teeth will cause the shape of the prism teeth to wear and deform with the number of times of use, and the quality and reliability of the processed prism film will decrease.

2. When repairing the wheel engraved with prism teeth, or wanting to change parameters such as prism period and modulation depth, it is necessary to use laser or mechanical processing methods to process the gears. The processing technology is complicated, the cycle is long, and the cost is high.

3. The modulation depth of the prism structure on the surface of the prism film processed by the traditional process is generally fixed and unchanged, which cannot effectively prevent the occurrence of defects such as adhesion of the film material

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