Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-07-12
2005-07-12
Ngo, Huyen (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S130000, C349S062000, C349S095000
Reexamination Certificate
active
06917403
ABSTRACT:
A reflective liquid crystal display device that can prevent a battery effect causing asymmetry in a liquid crystal, display can reduce an offset voltage applied to a driving voltage, and can secure high reliability even during long term driving. A pixel electrode is covered with a metal film, which has a standard electrode potential, with a sign opposite to that of a metallic material constituting the pixel electrode. The metal film prevents a battery effect between the opposing electrodes, unlike conventional devices which do not have the metal film. Thereby, the asymmetry in the liquid crystal display responses can be prevented and the reduction of the offset voltage, which is required for the driving voltage, can be accomplished unlike the conventional ones. A circuit for applying the offset voltage is simplified or unnecessary, and improvement of long term reliability during the driving can be accomplished.
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Hashimoto Shunichi
Isozaki Tadaaki
Miyamoto Shoko
Maioli Jay H.
Ngo Huyen
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