Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2007-08-21
2007-08-21
Nelms, David (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S114000, C349S118000, C349S119000, C349S179000, C349S180000, C349S181000
Reexamination Certificate
active
10485078
ABSTRACT:
The present invention is configured so that it has a first substrate, a second substrate, a liquid crystal layer pinched between the first substrate and second substrate, and a driving unit, wherein a characteristic of a reflectivity versus an applied voltage is a normally closed type and a characteristic of a transmissivity versus an applied voltage is the normally closed type: wherein the first substrate has a common electrode, and an upside polarization plate and upside phase plate on an upper surface; wherein the second substrate has a reflective electrode and transparent electrode connected with an active element, and a downside polarization plate and downside phase plate on a lower surface; wherein the liquid crystal layer has a twist angle not less than 40 degrees and not more than 65 degrees; wherein a retardation of the liquid crystal layer in a reflective display unit is within a range of not less than 230 nm and not more than 300 nm; and wherein a retardation of the liquid crystal layer in a transmissive display unit is larger than the retardation of the liquid crystal layer in the reflective display unit. Thus, is obtained a display that is more luminous and wider in a light reproduction range under a wide range of luminous environments ranging from a dark place to direct sunlight.
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Anno Kouichi
Hayata Hiroko
Itou Osamu
Komura Shinichi
Hitachi , Ltd.
Hogan & Hartson LLP
Nelms David
Nguyen Thanh-Nhan P.
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