Backlight module and production method of its substrate

Abstract

A backlight module comprises a transparent substrate and at least one light source, wherein the transparent substrate is doped with fluorescent powder, the fluorescent powder is substantially centralized on one side of the transparent substrate, specific weights of the transparent substrate and the fluorescent powder are different, the light source connected to the transparent substrate provides light beams for the transparent substrate and changes color of the light beams via the fluorescent powder. In the backlight module, the manufacturing method of the transparent substrate comprises the following steps: providing a mould, uniformly mixing the transparent plastic and the fluorescent powder and adding a hardening agent to form mixed liquid, the specific weight of the fluorescent powder is larger than that of the transparent plastic, filling the mixed liquid into the mould, and then solidifying the mixed liquid to form a substrate, and finally concentrating the fluorescent powder to one side of the substrate.

Description

technical field [0001] The present invention relates to a manufacturing method of a backlight module and its substrate, in particular to a backlight module and a manufacturing method of the substrate which add fluorescent powder to the substrate and use the fluorescent powder to change the color of light beams. Background technique [0002] The light source used in the backlight module of the liquid crystal display device in the prior art all adopts a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp, CCFL), which is coated with fluorescent powder on the inner wall of the lamp tube. When a high voltage is applied to the lamp tube, after the electrons released by the lamp tube electrodes collide with the mercury vapor in the lamp tube, the mercury vapor is excited and becomes an excited state, and when it returns to a stable state, it will release ultraviolet light, and It is absorbed by the fluorescent powder coated on the inner wall of the lamp tube, and then emi...

AI Technical Summary

Problems solved by technology

[0004] However, in the era of ever-changing science and technology, liquid crystal display devices are increasingly emphasizing lightness, thinness and shortness. Although the US2005 / 0017619A1 patent effectively solves the problem of blackheads in the prior art and simplifies the production process of the lamp, it uses phosphor coating and spraying on the The upper or lower surface of the transparent substrate also increases the thickness of the liquid crystal display device

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