Method and apparatus for enhancing a contrast ratio of a liquid crystal display
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United States of America Patent
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app pub date -
Jul 31, 2006
filing date -
Oct 22, 2003
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Abstract
A liquid crystal display has a liquid crystal display panel, a backlight and a dark layer. The liquid crystal display panel has an upper polarizer, a liquid crystal cell, and a lower polarizer, and the two polarizers both have wide view optical compensation films. The light emitted from the backlight is transmitted to a viewer through the lower polarizer, the liquid crystal cell, and the upper polarizer, sequentially. The dark layer of the invention is placed between the backlight and the viewer, and it lowers the dark-state brightness of the liquid crystal display to improve the downward angle view contrast ratio thereof to be greater than 10.
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