Backlight module and display device

Abstract

The invention provides a backlight module and a display device. The backlight module comprises a plurality of light sources located in a plurality of scanning control regions, and the light sources in each scanning control region are turned on or off simultaneously. The backlight module further comprises optical material layers arranged on the light outgoing sides of the light sources, and the optical material layers have different refractive indexes when different control parameters are applied to the optical material layers, wherein the refractive indexes of the optical material layers corresponding to the scanning control regions where the corresponding light sources are turned on are higher than the refractive indexes of the optical material layers corresponding to the scanning control regions where the corresponding light sources are turned off. According to the backlight module, the optical material layers corresponding to the scanning control regions are arranged, so the optical material layers have the different refractive indexes when the different control parameters are applied to the optical material layers, partial light emitted by the scanning control regions where the corresponding light sources are turned on enters corresponding display regions and is prevented from entering display regions corresponding to the scanning control regions where the corresponding light sources are turned off.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] In the time-division stereoscopic display method (such as SG3D, Real D3D display technology), it is necessary to cooperate with the scanning of the backlight source to achieve high-quality display. The usual practice is to divide the backlight into multiple scanning areas. Each scanning area is equipped with multiple light sources. The light sources in one scanning area have the same turn-on and turn-off time. The turn-on time of the light source in each scanning area matches the display of the panel. Each scanning area is turned on one by one, and the corresponding scanning area is turned off after the display screen is completed. [0003] In the traditional direct type backlight structure, such as figure 1 and figure 2 As shown, the light sources 1 are distributed in an array, and the diffuser plate 2 i...

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Problems solved by technology

[0004] In the backlight module of the prior art with the above structure, when the light source 1 in the scanning area A is turned off, and the light sources in the other scanning areas B and C emit light, at this time, due to the structural characteristics of the diffuser plate, the light from the light-emitting scanning area to the light-off area A large area of ​​divergence forms crosstalk, which affects the display quality of the display area corresponding to the scanning area

[0005] Therefore, the existing direct-lit backlight module cannot effectively control crosstalk during 3D display, thereby affecting the quality of 3D display

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