Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-10-15
1998-05-19
Gross, Anita Pellman
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 99, 349117, 349180, 349181, G02F 11335, G02F 113
Patent
active
RE0357995
ABSTRACT:
A reflection-type liquid crystal (LC) device having a twisted nematic (TN) LC layer that lets linearly-polarized incident light enter and become circularly-polarized at a reflecting surface, and then linearly polarizes it, after reflecting, with a plane of polarization that has been rotated 90.degree. from the incident light at an light output surface. The TN LC layer allows linearly-polarized incident light to enter at an angle to the molecular plane of light input of the twisted nematic LC, and to linearly polarize the light after reflection. The plane of polarization is rotated 90.degree. from the incident light at the light output surface. The TN LC layer also allows circularly-polarized incident light to enter and become linearly-polarized light at the reflecting surface. Circularly-polarized light after reflection may be rotated opposite the incident circularly-polarized light at the light output surface to provide for reverse on/off states.
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Tomio Sonehara et al., "A New Twisted Nematic ECB (TN-ECB) Mode for a Reflective Light Value", JAPAN DISPLAY'89, Oct. 16, 1989, pp. 192-195.
Okumura Osamu
Sonehara Tomio
Gross Anita Pellman
Seiko Epson Corporation
Watson Mark P.
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