Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2006-03-03
2009-11-24
Nelms, David (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S062000, C349S063000, C349S064000, C349S065000, C349S066000, C349S067000, C349S068000, C349S069000, C349S070000, C349S071000, C362S612000, C362S615000, C362S619000
Reexamination Certificate
active
07623197
ABSTRACT:
A flat screen comprises a liquid-crystal element, such as an LCD element, for representing an image. Further, a plurality of point light sources, such as LEDs, are provided. Between the point light sources and the liquid-crystal element a light-guiding element is arranged. For rendering the brightness distribution more uniform, the light-guiding element comprises at a surface thereof a plurality of diffractive surface elements arranged in cells.
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Ballard Spahr LLP
Nanogate Advanced Materials GmbH
Nelms David
Nguyen Thanh-Nhan P
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