Liquid crystal cells – elements and systems – Liquid crystal system – Liquid crystal window
Reexamination Certificate
2005-02-01
2009-06-23
Caley, Michael H (Department: 2871)
Liquid crystal cells, elements and systems
Liquid crystal system
Liquid crystal window
C349S196000, C359S613000
Reexamination Certificate
active
07551239
ABSTRACT:
A viewing angle control element of the present invention contains transparent regions23having a transmittance T1and light shield regions24capable of switching between a transmittance T2and a transmittance T3which is less than T1and T2according to an external signal. Each of the transparent regions23and the light shield regions24is positioned opposite to one of pixels. Displays are produced at or close to the original brightness of the image display element in wide viewing angle mode, whereas in narrow viewing angle mode, light transmission is limited to achieve narrow viewing angles. This is in contrast with other viewing angle control elements which produce displays at or close to the original brightness of the image display element in narrow viewing angle mode, whereas in wide viewing angle mode, light is diffused or otherwise modified to achieve wide viewing angles. Thus, the viewing angle control element is capable of achieving both wide viewing angles and narrow viewing angles, and still preventing image quality deterioration at wide viewing angles due to decreased brightness of the image display element.
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Fukushima Hiroshi
Takatani Tomoo
Wada Masakazu
Yabuta Koji
Caley Michael H
Nixon & Vanderhye P.C.
Sharp Kabushiki Kaisha
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