Liquid crystal display device with a backlight unit having a...

Details Liquid crystal display device with a backlight unit having a... Liquid crystal display device with a backlight unit having a...

2011-05-17

2011-05-17

Ullah, Akm E (Department: 2874)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C362S029000

Reexamination Certificate

active

07944526

ABSTRACT:
A liquid crystal display device having a direct backlight which uses a high-bright light source achieves both of a high efficiency and thin uniformity. In a liquid crystal display device which includes a liquid crystal panel, and a backlight unit which is arranged on a side of the liquid crystal panel opposite to a display screen of the liquid crystal panel, the backlight unit includes a housing, a plurality of light sources arranged in the inside of the housing, and a diffusion plate which is arranged between the plurality of light sources and the liquid crystal panel, the diffusion plate includes a plurality of light blocking regions at positions corresponding to the plurality of respective light sources, and the light blocking region at a center portion of the housing and the light blocking region at an edge portion of the housing exhibits transmissivities different from each other.

REFERENCES:
patent: 7185995 (2007-03-01), Hatanaka et al.
patent: 7438429 (2008-10-01), Matsushita
patent: 2004/0061813 (2004-04-01), Aoki
patent: 2006/0007302 (2006-01-01), Numata et al.
patent: 2007/0222915 (2007-09-01), Niioka et al.
patent: 2008/0284942 (2008-11-01), Mahama et al.

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