Liquid crystal controller and liquid crystal display unit

Details Liquid crystal controller and liquid crystal display unit Liquid crystal controller and liquid crystal display unit

1997-11-14

2000-07-04

Lao, Lun-Yi

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345147, 345153, G09G 336

Patent

active

060845619

ABSTRACT:
A liquid crystal controller for controlling display of a liquid crystal display device of passive matrix type includes gray scale processing being performed on input data before being written in a frame memory for frame frequency conversion and gray scale processing being performed after the frequency conversion and reading of the data from the frame memory so that an amount of information of display data written in the frame memory can be reduced. Further, since the gray scale display pattern is switched by the same switching frequency as the converted frame frequency, pattern movement and flicker of the gray scale display portions can be reduced.

REFERENCES:
patent: 5534883 (1996-07-01), Koh
patent: 5583530 (1996-12-01), Mano et al.
patent: 5818409 (1998-10-01), Furuhashi et al.
"Pulse-Height Modulation (PHM) Gray Shading Methods for Passive Matrix LCDS", Conner et al, Proceedings of the International Display Research Conference Japan Display, Jan. 1, 1992, pp. 69-72.
"A 31-In. Diagonal Full-Color Surface-Discharge AC Plasma Display Panel",, Kanagu et al, SID International Symposium Digest of Papers, Boston, May 17-22, 1992, Society for Information Display, pp. 713-716.

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