Method for improving visibility of liquid crystal display device, and liquid crystal display device using the same
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United States of America Patent
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Mar 16, 2021
Grant Date -
Jan 3, 2019
app pub date -
Aug 13, 2018
filing date -
Nov 12, 2009
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Abstract
The present invention provides a liquid crystal display method capable of, when a screen thereof is observed through a polarizer such as sunglasses, ensuring an excellent visibility regardless of the angle of observation. In a liquid crystal display device at least having a backlight light source, a liquid crystal cell, and a polarizer disposed on a viewing side of the liquid crystal cell, a white light-emitting diode is used as the backlight light source; and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used so as to be disposed on the viewing side of the polarizer so that an angle between an absorption axis of the polarizer and a slow axis of the polymer film becomes about 45 degrees.
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