Composite optical film and manufacturing method thereof

Abstract

The invention discloses a composite optical film with high luminance, high diffusance and no interference of Newton rings, which comprises a base material layer, a diffusion layer and a light condensing layer stacked in sequence, wherein the diffusion layer comprises a diffusion layer resin which comprises a plurality of particles, is adjacent to a particle swarm of the base material layer and fixes the particle swarm; the light condensing layer comprises a light condensing layer resin, forms a light outlet surface and a microstructure unit capable of collectively emitting light rays; and the microstructure unit comprises a plurality of main microstructures regularly arranged. The composite optical film is characterized in that: a joint surface for joining the diffusion layer with the light condensing layer is formed to trend to the particle swarm periphery; the diffusion layer is provided with a plurality of bulges covering at least one particle respectively; and the microstructure unit also comprises a plurality of secondary microstructures which cover at least one bulge respectively, trend to extend between two adjacent main microstructures, and / or extend the covered main microstructures. The composite optical films have consistent efficacy performance between different optics under the circumstance of mass manufacture of production lines.

Description

technical field [0001] The invention relates to an optical film, in particular to a composite optical film suitable for being installed in a liquid crystal display (LCD). This invention also relates to the manufacturing method of this composite optical film. Background technique [0002] In order to allow the LCD screen to emit high-brightness light evenly, a variety of different types of optical films have been developed in this field; the functions and structures of the diffusion film and the light-concentrating film are combined into one, and the compounding of the substrate amount is saved. Optical film [composite optical film, or "multi-functional film" (multi-functional film)] is a relatively new research and development trend. Similarly, high luminance and high diffusivity are also the functional requirements for composite optical films in this field. [0003] Composite optical films can be roughly divided into two different categories according to their structural ...

AI Technical Summary

Problems solved by technology

[0008]In addition, various composite optical films often have rainbow patterns on the surface when light passes through, thus reducing the visual satisfaction of LCD users; it is reported that this rainbow The pattern phenomenon is caused by the regularized geometric configuration and arrangement of the microstructures of the light-gathering layer.

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