A method of manufacturing an optical diffuser film

Abstract

The invention discloses a method for manufacturing an optical diffusion film. The steps include: (A) using a tool to draw a mold core, and marking the surface of the mold core with a first dimension direction perpendicular to a second dimension direction to form a grid-like pattern with peaks and valleys. Concave-convex structure; (B) emboss a film coated with glue on the surface of the film through the mold core, and at the same time use a light source to expose and cure, forming a structure corresponding to the concave-convex structure on the surface of the film; (C) The film is cut to make an optical diffusion film. Therefore, the manufacturing method of the optical diffusion film of the present invention can not only produce a large-area and low-cost optical diffusion structure, but when light passes through the optical diffusion film, light diffusion and homogenization can be achieved through the regulation of the concave-convex structure, so that the optical diffusion film can At the same time, it has good diffusivity and light field control function.

Description

A method of manufacturing an optical diffuser film technical field The invention relates to a method for manufacturing an optical diffusion film, in particular to a method for manufacturing an optical diffusion film with a concave-convex structure. Background technique The production of diffusers can be divided into two categories. One is the beaded type, that is, the particles with a different refractive index than the substrate are mixed into the substrate, but its diffusivity and light transmittance are not easy to balance; the other is It is an embossed type, that is, a microstructure that can diffuse light is formed on the surface of the diaphragm. Its surface topography can be divided into random topography, regular topography and wavy topography. The wavy topography is usually made by laser The shape change of the mold core required by the processing method is determined by controlling the intensity of the laser light energy and the beam size. Although the microstru...

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Problems solved by technology

Therefore, in order to solve the above-mentioned problem of being unable to manufacture a large-area optical diffusion film and high cost, the object of the present invention is to provide a method for manufacturing an optical diffusion film. Electroforming or hot pressing to form mold cores or substrates; when making a two-dimensional or more lattice-like structure, the mold can be turned over according to requirements during the manufacturing process. The mold turning methods include electroforming or hot pressing to form mold cores or substrates Therefore, the present invention can produce a large-area diffuser. Compared with the traditional laser marking method, it not only saves the process time but also can precisely control the diffusion structure and shape, and reduces the process cost. It can also provide both diffusion and light field control. Functional diffuser, and when used in lighting modules, it can reduce the use of other diffusers and achieve thinning requirements

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