Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Patent
1993-03-01
2000-04-18
Parker, Kenneth
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
349 69, 362339, 362 84, G02F 11335
Patent
active
060521643
ABSTRACT:
A backlight display includes a case having an optical window through which displayed information may be viewed. In addition it includes an electroluminescent panel for providing the backlight. It further includes a structured surface material between the electroluminescent panel and the optical window. The structured surface material has the property of reflecting light entering it while making an angle in a first predetermined group of angles with the axis of the display back to the electroluminescent panel. It further has the property of refracting light entering it while making an angle in a second predetermined group of angles to the axis of the display such that a majority of the light in the second group will exit in an output wedge that is smaller than the input wedge.
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Cobb, Jr. Sanford
Dreyer John F.
3M Innovative Properties Company
Buckingham Stephen W.
Parker Kenneth
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