Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1998-11-17
2000-08-01
Wu, Shean C.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
25229963, 25229967, 349 42, 349129, G02F 11343, C09K 1930
Patent
active
060974664
ABSTRACT:
A TFT using a low-temperature poly silicon thin film as an active layer is formed on a TFT substrate, and a plurality of pixel electrodes made of a reflection material such as Al are formed on the TFT and an electrode wiring through an interlayer insulator film to cover the TFT and the electrode wiring. A liquid crystal layer has a vertical alignment, and a fluorine based liquid crystal molecule having a negative dielectric anisotropy and at least fluorine on a side chain is used as a liquid crystal material. A product .DELTA.n .multidot.d of a birefringence .DELTA.n of the liquid crystal layer and a thickness d of the liquid crystal layer is set equal to or less than 0.30 so that an excellent voltage--transmittance characteristic can be obtained. Thus, the liquid crystal layer can be fully operated by low-voltage driving which is realized by a poly silicon TFT.
REFERENCES:
patent: 5471330 (1995-11-01), Sarma et al.
patent: 5514879 (1996-05-01), Yamazaki et al.
patent: 5557534 (1996-09-01), Wu
patent: 5576860 (1996-11-01), Nakamura et al.
patent: 5600155 (1997-02-01), Wu
patent: 5905548 (1999-05-01), Shimada
Sanyo Electric Co,. Ltd.
Wu Shean C.
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