Liquid crystal display device
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United States of America Patent
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N/A
Issued Date -
Oct 4, 2007
app pub date -
Oct 26, 2006
filing date -
Oct 28, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a liquid crystal display device having a backlight device which can realize the high brightness and the high uniformity of in-plane brightness by allowing an optical sheet which is arranged above a light guide plate to effectively make use of light from spot light sources. An optical sheet is arranged between a side-light-type backlight device which includes a light guide plate and spot light sources on one side surface of the light guide plate and a liquid crystal display panel. The optical sheet is constituted of a sheet-like transparent base member and a plurality of convex lenses which are arranged on a backlight-device-side surface of the transparent base member. The convex lenses have a circular bottom surface shape and the centers of the bottom surfaces of the lenses are periodically arranged.
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