Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
2000-01-14
2000-08-01
Parker, Kenneth
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349122, 349123, G02F 11337
Patent
active
060974648
ABSTRACT:
A multi-domain homeotropic aligned liquid crystal display has cruciform bump structures formed around pixel electrodes. The cruciform bump structures are fabricated on a substrate of a color filter or a thin film transistor. The bump structures orient liquid crystal molecules with a pre-tilted angle which results in the alignment of liquid crystal molecules to form four-domain textures after a voltage is applied. A standard photo-lithographic process or a back side exposure method is used to manufacture the bump structures. The back side exposure method has the advantages of being simple and clean. It avoids electric static damage and particle pollution. The liquid crystal panel provides an extremely wide viewing angle of more than 140.degree., a high contrast ratio of more than 700, and fast response of less than 30 ms. The light intensity of the liquid crystal mode can reach up to 55% of that of a conventional 90.degree.-twisted nematic LCD, and is 20% higher than that of a conventional vertically aligned wide-viewing angle LCD.
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ASIA Display 98, 375 Wide Viewing Angle TFT-LCD Based on Rdge and Fringe-Field Multi-Domain Homeotropic Structure, 1998.
SID 98 Digest. Ridge and Fringe-Field Multi-Domain Homeotropic LCD, 1998.
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ASIA Display 98.375 LCD Wide Viewing Angle TFT-LCD Based on Ridge and Fringe-Field Multi-Domain Homeotropic Structure.
Industrial Technology Research Institute
Parker Kenneth
Qi Mike
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