Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-08-09
2005-08-09
Chowdhury, Tarifur R. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S123000, C349S171000, C349S177000, C349S184000, C349S186000
Reexamination Certificate
active
06927825
ABSTRACT:
When a transition voltage, which is higher than a display voltage for image display, is applied to liquid crystal, the liquid crystal can transition to a bend alignment. Therefore, by applying a transition voltage to liquid crystal prior to image display period only for a transition time which depends on a transition voltage so as to cause a bend transition in the liquid crystal, an OCB mode LCD with a high speed response can be obtained. An interval d between pixel regions is set to be less than, for example, a transition distance of 5 μm, so that a bend transition expands over inter-pixel regions to thereby achieve a bend transition all over the display region. In an active matrix type LCD, a electrical field is caused to be generated between a common electrode and data lines or gate lines disposed between pixel electrodes due to application of a transition voltage to the common electrode, thereby obtaining a bent transition over the entire surface of the display screen. Further, a pretilt angle set by an alignment film is determined to be 1.2° or more, such that a great number of transition sources for causing a bend transition are generated to thereby secure a high speed bend transition. Also, the pretilt angle is set to be 3° or less for accelerating a response time in a bend alignment.
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Koma Norio
Uchida Tatsuo
Cantor & Colburn LLP
Chowdhury Tarifur R.
Nguyen Hoan Chau
Sanyo Electric Co,. Ltd.
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