Backlight source and liquid crystal display (LCD)

Abstract

The disclosure discloses a backlight unit and a liquid crystal display comprising thereof. The backlight unit comprises a light guiding plate comprising a plurality of light guiding plate units, which are arranged as a matrix along longitudinal and traversal directions, with line-shaped gaps extending respectively along traversal or longitudinal direction existing between two adjacent light guiding plate units; a light source provided at a side of light guiding plate; and a diffusing sheet provided above the light guiding plate. At a position corresponding to the line-shaped gap between the two adjacent light guiding plate units, the diffusing sheet has a shape of line-shaped projection, and the line-shaped projection has a projected direction in a direction of the light emitted from the light guiding plate unit. According to the disclosure, the uniformity of the backlight may be improved.

Description

technical field [0001] The invention relates to the field of liquid crystal display manufacture, in particular to a backlight source and a liquid crystal display. Background technique [0002] In the process of realizing high-quality picture display of liquid crystal displays, the design of the backlight source is particularly important. The backlight source includes: a light source (point light source or line light source, etc.), a light guide plate, and a diffuser. Wherein, the light emitted by the light source enters the light guide plate, and forms a relatively uniform surface light source under the action of the light guide plate; the diffusion sheet can make the light transmitted from the light guide plate more uniform. The backlight emits the adjusted relatively uniform backlight into the display screen to achieve the purpose of display. At present, in order to realize local dimming, the light guide plate is usually divided into several light guide plate units, so t...

AI Technical Summary

Problems solved by technology

[0003] However, this light guide plate applied to local dimming, such as figure 1 As shown, there will be seams 10 between every two adjacent light guide plate units, resulting in irregular light paths, although the diffusion sheet in the prior art can reduce the brightness of the display screen caused by irregular light paths to a certain extent. Even, but due to the limited effect of the diffuser, the uneven brightness and darkness of the display is still serious, which affects the performance of the entire liquid crystal display

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