Liquid crystal cells – elements and systems – Particular excitation of liquid crystal – Electrical excitation of liquid crystal
Patent
1997-03-26
2000-07-25
Dang, Hung Xuan
Liquid crystal cells, elements and systems
Particular excitation of liquid crystal
Electrical excitation of liquid crystal
345 89, 345 99, 345100, G02F 1133, G09G 336
Patent
active
060942436
ABSTRACT:
A liquid crystal display device including a liquid crystal panel is disclosed. The liquid crystal display device includes: a display data transformer for receiving input image data for one frame, for dividing a selection period for each row electrode in the frame into subframes of a number equal to or greater than a number of gray-scale bits representing a gray-scale level of the input image data, the scanning signal being applied to the row electrode during the corresponding selection period, and for generating binary display data in which respective binary data is associated with each subframe according to the gray-scale bits. The Liquid crystal display device further includes a pulse width controller for controlling the division of the selection period in the display data transformer and for setting a respective subframe period independently for each subframe; and a pulse amplitude controller for transforming the binary display data by setting a respective voltage amplitude independently for each subframe according to the binary display data so as to generate a display signal having a respective voltage value set independently for each subframe.
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T.J. Scheffer et al.; "Active Addressing Method for High-Contrast Video-Rate STN Displays"; SID 92 Digest, 1992; pp. 228-231.
Ruckmongathan et al.; "A New Addressing Technique for Fast Responding STN LCDs"; Japan Display '92; pp. 65-67.
Dang Hung Xuan
Duong Tai V.
Sharp Kabushiki Kaisha
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