Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-01-18
2005-01-18
Epps, Georgia (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S245000
Reexamination Certificate
active
06844956
ABSTRACT:
A reflective display device includes a switching layer, placed between substrates, for switching between a transmissive state for allowing transmission of incident light and a scattering state for scattering the incident light, and a retro-reflector for reflecting an incident ray from the liquid crystal layer so that an outgoing ray of the reflected light is parallel to the incident ray. A pitch of smallest unit structures of the retro-reflector is set to be larger than 0 mm and not more than 5 mm. The retro-reflector is preferably in a form of a corner cube array and has light absorbing surface portions at borders of the smallest unit structures. With this reflective display device, brightness of white state and contrast ratio can be improved.
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Minoura Kiyoshi
Mitsui Seiichi
Okamoto Masayuki
Sako Teiyu
Tomikawa Masahiko
Epps Georgia
Hasan M.
Nixon & Vanderhye P.C.
Sharp Kabushiki Kaisha
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