Backlight module and liquid crystal display device

Abstract

The invention provides a backlight module and a liquid crystal display device, the backlight module comprises a back plate, a light guide plate, a fluorescent transparent ceramic chip and a light source, the light guide plate, the fluorescent transparent ceramic chip and the light source are all arranged on the back plate, the light source is arranged on the light incident side face of the light guide plate, the fluorescent transparent ceramic chip is arranged between the light emitting side of the light source and the light incident side face of the light guide plate. According to the backlight module, the fluorescent transparent ceramic chip is arranged between the light source and the light guide plate, the color gamut of the backlight module can be improved, the color rendering index can be increased, the light source is converted into the linear light source through the fluorescent transparent ceramic chip, and the common phenomena such as shadows of side-entry backlight can be effectively improved; in addition, the light incident side face of the light guide plate does not need to be of a sawtooth edge structure, the light utilization rate is improved, and the brightness of the backlight module is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a liquid crystal display device. Background technique [0002] With the rapid development of display technologies such as quantum dot technology, OLED technology, and Micro LED, people are more inclined to use high-color-saturation display products, and the current high-color-saturation technology of LCD screens is not yet very mature. The commonly used method to improve the color gamut is to use a blue LED to add a layer of quantum dot diffusion film, but this method will reduce the brightness of the backlight due to the introduction of the quantum dot diffusion film (increase in the thickness of the diffusion film and decrease in transmittance). Increase the thickness of the backlight, and the blue light will overflow from around the backlight, which will affect people's vision; another method to improve the color gamut is to use blue LED plus YAG phosph...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a backlight module and a liquid crystal display device, which can solve the problem of lower backlight brightness and increased module thickness caused by the use of quantum dot diffusion films in the prior art when increasing the color gamut, and the use of blue LEDs plus YAG When phosphor powder is added to KSF phosphor powder, LED packaging will be difficult, LED brightness will decrease, and the entire color gamut of the display will fluctuate.

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