Hollow type back illumination beam component

Abstract

The invention relates to a hollow backlight component, including a first light guide board, a second light guide board, two side light sources, a reflection sheet and a diffusing board, where there is a hollow light guide region formed between the tow light guide boards, the two side light sources are set on two sides of the hollow light guide region, respectively, the reflection sheet is on the outer surface of the second light guide board and the diffusing board is on the outer surface of the first light guide board, the lights of the two side light sources enter into the hollow light guide region and then enter into the first and second light guide boards, respectively, the reflection sheet can reflect the light transmitted from the second light guide board to the hollow light guide region, and the diffusing board can diffuse and uniformly output the light exported from the first light guide board.

Description

technical field [0001] The invention relates to a backlight assembly of a liquid crystal display, in particular to a hollow backlight assembly. Background technique [0002] With the rapid progress of thin-film liquid crystal display (TFT-LCD) manufacturing technology, and its advantages of thinness, power saving, and radiation-free, liquid crystal displays are widely used in personal digital assistants (PDAs), notebook computers, Digital cameras, camcorders, mobile phones and other electronic products. Coupled with the industry's active investment in research and development and the adoption of large-scale production equipment, the quality of liquid crystal displays has been continuously improved, and the price has been continuously reduced, so that the application fields of liquid crystal displays have rapidly expanded. However, since the liquid crystal display is a non-luminescent display device, it needs a backlight assembly to produce a display function. [0003] Fig....

AI Technical Summary

Problems solved by technology

[0004] However, since the direct-type backlight assembly of the known technology distributes a plurality of lamp tubes evenly on the lower surface of the diffuse light guide plate, and the thickness of the diffuse light guide plate is usually only 2 to 4mm, the light enters from the light incident surface to the light exit surface. The emitted light guide path is too short, and the number of times the light is scattered by the diffuse particles inside the diffuse light guide plate is limited, so that the light inside the diffuse light guide plate cannot be evenly diffused, and cannot be diffused in the diffuse light guide plate. Uniform light output from the light exit surface

In addition, because the known technology is to cover the lamp tube and the backlight assembly as a whole, the heat dissipation effect of the backlight assembly as a whole will be deteriorated, so that the high heat generated by the lamp tube is easily accumulated inside the backlight assembly, and then diffused The light guide plate is transmitted to the liquid crystal display above it, which affects the liquid crystal inside the liquid crystal display

Moreover, due to the high shading rate of the diffuse light guide plate, relatively, the luminous flux of the light inside the diffuse light guide plate is also reduced, which affects the overall brightness of the backlight assembly and the viewing quality of the liquid crystal display.

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