Backlight unit uniformly illuminating object regardless of lapse of time and liquid crystal display panel device using the same
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United States of America Patent
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Feb 20, 2007
Grant Date -
Feb 6, 2003
app pub date -
Jul 26, 2002
filing date -
Jul 31, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A liquid crystal display panel device has a backlight unit for illuminating the reverse surface of a liquid crystal display panel, and the backlight unit includes a diffusion plate, a diffusion sheet adhered to one of the major surfaces of the diffusion plate, a lamp house and a moisture-proof sheet inserted between the other surface of the diffusion plate and the lamp house; the moisture-proof sheet prevents the diffusion plate from vaporization of water contained in the diffusion plate, and the diffusion plate is not warped; the diffusion plate maintains the initial shape immediately after the assemblage into the backlight unit so that the liquid crystal display panel is continuously uniformly illuminated by the backlight unit.
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