Backlight module, display device and liquid crystal display television

Abstract

The invention discloses a backlight module, a display device and a liquid crystal display television. An angle selection sheet is arranged on the light emitting side of a light source and can reflectlight in a first incident angle range and transmit light in a second incident angle range. When a first incident angle range corresponds to an emergent angle of an emergent center position of a lightsource and the second incident angle range corresponds to the emergent angle of the edge position of the light source, only part of emergent small-angle light rays are transmitted, part of light rayswith specific angles are reflected back to the direction of the light source, and emergent large-angle light rays are emitted in an anti-reflection mode. The small-angle light reflected back to the light source direction is scattered or diffusely reflected by the reflector plate to form a part of large-angle light; therefore, the emergent intensity of the small-angle light close to the emergent center is reduced, and the emergent intensity of the large-angle light far away from the emergent center is increased, so that the final emergent illuminance is consistent, and the uniformity of the emergent light of the light source is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module, a display device and a liquid crystal television. Background technique [0002] A backlight module is an essential part of a non-self-illuminating transmissive display device. The luminous uniformity of the backlight module is of great significance to the display of the display device. Backlight modules at the present stage can be divided into two types: direct-type backlight modules and side-type backlight modules. Direct-type backlight modules are widely used because of their advantages of high luminance, high light utilization rate, and simple structure. [0003] A direct-type backlight module usually includes multiple light sources, and the intensity of the light projected by the light source is higher at the center position, while the intensity at the edge position is smaller, so that the light distribution at the junction of the light source and the li...

AI Technical Summary

Problems solved by technology

[0003] A direct-type backlight module usually includes multiple light sources, and the intensity of the light projected by the light source is higher at the center position, while the intensity at the edge position is smaller, so that the light distribution at the junction of the light source and the light source is weaker, resulting in backlight The problem of poor brightness uniformity

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