Backlight module

Abstract

The invention relates to a backlight module. The backlight module comprises at least one light source set, at least one coupling optical fiber, at least one diverging lens and a light guide element set. Each of the light source sets is corresponding to one of the coupling optical fibers and one of the diverging lenses. Each of the light source sets comprises a first light source, a second light source and a third light source. The first light sources are used for emitting red light. The second light sources are used for emitting green light. The third light sources are used for emitting blue light. Each of the coupling optical fibers comprises three light inlet ends and one light outlet end. The three light inlet ends are all communicated with the light outlet end. The three light inlet ends are arranged with the first light source, the second light source and the third light source in a one-to-one correspondence manner for receiving light emitted from the corresponding light sources, evenly mixing the light and emitting the light from the light outlet end. The diverging lenses are arranged opposite to the light outlet ends for receiving light rays emitted from the light outlet ends and diverging the light rays. The light guide element set is arranged at the light outlet sides of the diverging lenses for receiving and uniformly emitting the light rays from the diverging lenses.

Description

technical field [0001] The invention relates to a backlight module, in particular to a direct type backlight module. Background technique [0002] The backlight module provides a white light source for the liquid crystal display, and the white light source in the direct-lit backlight module generally consists of more light sources, such as LED dot matrix or cold cathode tubes. Using LED dot matrix or cold cathode tube as the light source, the white light emitted by it is usually mixed by exciting phosphor powder, but this will cause the display using this backlight module to have insufficient display color gamut and poor saturation of displayed colors and other defects. Contents of the invention [0003] In view of this, it is necessary to provide a backlight module capable of enabling the display to display a wider color gamut and better color saturation. [0004] A backlight module includes at least one light source group, at least one coupling fiber, at least one dive...

AI Technical Summary

Problems solved by technology

Using LED dot matrix or cold cathode tube as the light source, the white light emitted by it is usually mixed by exciting phosphor powder, but this will cause the display using this backlight module to have insufficient display color gamut and poor saturation of displayed colors and other defects

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