Brightness enhancement film, and methods of making and using the same
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United States of America Patent
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Jul 31, 2007
Grant Date -
Jun 1, 2006
app pub date -
Jan 4, 2006
filing date -
Feb 28, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In one embodiment, a brightness enhancement film comprises: a diffusing film comprising a front surface and a back surface, a coating on the front surface, and light redirecting structures disposed in the coating. The brightness enhancement film is capable of collimating light, and wherein, without the coating, the diffusing film would be capable of spread light passing through the back surface. In another embodiment, the brightness enhancement film comprises: a diffusing film comprising a front surface and a back surface, a coating on the front surface, and light redirecting structures disposed in the coating. The diffusing film has a stress retardation gradient of less than or equal to 50 nm/in, wherein an interval for calculation of the stress retardation gradient is less than 1 inch. The brightness enhancement film is capable of collimating light.
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