Backlight system
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United States of America Patent
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-
Jan 1, 2008
Grant Date -
Dec 23, 2004
app pub date -
Dec 30, 2003
filing date -
Jun 18, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A backlight system for use with a liquid-crystal display provides longer lamp lifetime through uniform temperature distribution, offers improved brightness uniformity and enhanced power-supply system efficiency, and ensures safety through lowered voltages. Linear lamps (21, 23) are divided into left and right approximately in the middle. The distance that heat travels is therefore shorter than when linear lamps have a length extending throughout the horizontal direction, which enables more uniform temperature distribution on the entire screen and lengthens the lifetime of linear lamps (21, 23). Furthermore, stray current is halved to achieve uniform brightness and enhanced inverter efficiency and safety can be easily ensured through lowered voltages.
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