Manufacturing method of specular reflection dots and diffusion plate

Abstract

The invention relates to the technical field of backlight diffuser plates, and concretely relates to a manufacturing method of mirror reflection net dots and a diffuser plate. The method includes the following steps: crushing a silver reflection sheet into silver reflection powder, mixing the silver reflection powder with glue to form silver reflection paste, printing the silver reflection paste on the surface of a diffuser plate to form net dots, and baking the diffuser plate so that the net dots are cured and cooled naturally. The beneficial effects are as follows: the processing scale is large, processing is convenient and fast, costs are reduced, and the processed net dots are not liable to shed and exhibit better firmness; and direct illumination-type and thin-type backlight of an LED light source emitting light from four sides is realized, LED lamp distances are increased, the number of LEDs is reduced, LED shades are shielded, and the net dots exhibit higher backlight extraction efficiency.

Description

technical field [0001] The invention relates to the technical field of backlight expansion boards, in particular to a method for manufacturing specular reflection dots and a diffusion board. Background technique [0002] In the direct-lit backlight, in order to achieve the purpose of thinning the backlight and reducing the number of LEDs while achieving a good taste of the backlight without shadows, it is usually achieved by printing white ink dots on the expansion board. [0003] The use of white ink has a large divergence angle due to the reflected light, resulting in high dot coverage on the expansion board and low light extraction efficiency. Especially in the current backlight using four-sided light-emitting LED without lens as the light source, the light shadow is very obvious when the backlight is under H / P (the height of the light box is less than the distance between the lamps < 0.3). The efficiency is low, using the traditional white ink dot expansion board, th...

AI Technical Summary

Problems solved by technology

However, it is difficult to make specular reflection dots (silver reflection) on the diffuser plate. If a diffuser plate and a special dot mask are used to deposit specular reflection dots of metal materials (Al, Ag, Pt, etc.), the cost will increase. It is expensive and is easily affected by the size of the machine. It is difficult to achieve mass production of more than 32 inches, and the mirror dots produced are easy to fall off due to the rough surface (embossing) of the diffuser plate.

Images