Blue light LED direct type backlight module and liquid crystal display screen

Abstract

The invention discloses a blue light LED direct type backlight module and a liquid crystal display screen. The blue light LED direct type backlight module comprises an LED light source, a reflector plate and a quantum dot film, wherein the LED light source comprises blue light LED lamp beads arranged on the reflector plate, the quantum dot film is arranged above the blue light LED lamp beads, and yellow lattice points are arranged on the edge of the reflector plate and used for scattering the blue light shining on the yellow lattice points by the blue light LED lamp beads. By the adoption of the technical scheme, the phenomenon that due to short light mixing distance, a blue bright frame appears on the edge of the liquid crystal display screen which adopts the blue light LED direct type backlight module is avoided.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a blue LED direct-lit backlight module and a liquid crystal display. Background technique [0002] At present, the backlight modules of the existing liquid crystal display screens are divided into two types according to the difference of the backlight sources: direct-type backlight modules and side-type backlight modules. Flat-panel display devices are becoming thinner and thinner. As the thickness of the display device decreases, the light mixing distance of the direct-type backlight module will also be shortened accordingly. The shortening of the light mixing distance will affect the light mixing effect. The most intuitive performance That is, after turning on an LCD screen using a direct-type backlight module with a shorter light mixing distance, the brightness at the edge of the LCD screen will be significantly higher, resulting in the problem of edge bright fr...

AI Technical Summary

Problems solved by technology

Flat-panel display devices are becoming thinner and thinner. As the thickness of the display device decreases, the light mixing distance of the direct-type backlight module will also be shortened accordingly. The shortening of the light mixing distance will affect the light mixing effect. The most intuitive performance That is, after turning on the LCD screen using the direct-type backlight module with a shorter light mixing distance, the brightness at the edge of the LCD screen will be significantly higher, resulting in the problem of edge bright frames

[0003] The use of blue LED as the backlight can effectively improve the brightness of the optical module, and the conversion of blue light into white light through the quantum dot film can increase the proportion of display colors in the NTSC color gamut from 75% to 100%, bringing consumers more Good visual effects, so blue LED backlight modules will gradually become an industry trend; but when using blue LEDs as light sources, LCD screens with a short light mixing distance will also have the problem of edge bright frames, and edge bright frames It is blue, which greatly affects the display effect

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