Production method of diffusion plate

Abstract

The invention relates to a production method of a diffusion plate and belongs to the lighting technical field. With the diffusion plate produced by the production method of the invention adopted, diffusion films which are adopted subsequently can be decreased, and the shielding property and light transmittance of a whole unit can be improved. The production method includes the following steps that: A. base particles and light diffusion particles are evenly mixed according to a certain proportion, wherein the base particles are made of PS, PC or PMMA; B. extrusion molding is performed on the base particles and light diffusion particles in the step A, so that a basis plate can be formed; C. a micro structure layer of a ground line structure or a V-cut structure is prepared on the upper surface of the basis plate; D. a spray coating of which the thickness ranges from 0.01 to 1mm is sprayed on the outer side of the micro structure layer, and the spray coating is made of a UV adhesive and high-refractive index light diffusion particles, the ratio of the UV adhesive and the light diffusion particles being 50:1 to 10:1 UV in parts by mass; and E. a UV light is utilized to perform light curing baking on the spray coating, and the luminous flux of the UV light ranges from 600 to 1000LM. The production method of the invention has the advantages of simple process, easiness in fabrication and suitability for diffusion plate preparation. The production method adopted, processing time can be decreased, and processing difficulty can be reduced.

Description

technical field [0001] The invention belongs to the technical field of lighting, in particular to a method for producing a diffusion plate suitable for a liquid crystal display backlight module or an LED lighting device. Background technique [0002] Diffusion plates are widely used in devices such as backlight modules and LED lamps designed for direct light sources, which can make liquid crystal displays or LED lamps display uniform planar light sources. The diffusion plate can diffuse the light passing through the diffusion coating to make the light distribution more uniform, and at the same time, it can also optically shield the lamp shadow through the refraction, reflection and scattering of light. [0003] The general diffusion plate production process is divided into the following methods: 1. Directly use PS (polystyrene, Polystyrene), PC (polycarbonate, Polycarbonate) or PMMA (PolymethylMethacrylate, polymethyl methacrylate) as the main grain, add After an appropriat...

AI Technical Summary

Problems solved by technology

[0004] However, currently in the backlight module industry, the diffusion plate produced by the above method cannot meet the requirements of shading and light transmission, and it is still necessary to use a diffusion film to improve the shading and light transmission of the whole machine.

The subsequent addition of the diffusion film will not only increase the assembly man-hours due to an additional set of materials in the assembly of the whole machine, but also greatly increase the cost.

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