Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Reexamination Certificate
2007-08-21
2007-08-21
Boutsikaris, Leonidas (Department: 2872)
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
C359S013000, C349S015000
Reexamination Certificate
active
10913893
ABSTRACT:
A display is provided having first and second direct view modes of operation. The display comprises a liquid crystal display panel and a backlight which is illuminated during the first mode so that the displayed image is visible throughout an extended viewing region in front of the device. The display also comprises a holographic element and a front light source, which is switched on for the second direct view mode. The holographic element redirects light from the front light source into part of the extended viewing region so that an image displayed by the device is visible in only a restricted portion of the viewing region.
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Bourhill Grant
Evans Allan
Jacobs Adrian M. S.
Khazova Marina
Musgrave Bronje M.
Boutsikaris Leonidas
Renner , Otto, Boisselle & Sklar, LLP
Sharp Kabushiki Kaisha
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