Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-07-11
1998-04-07
Liang, Regina
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 93, G09G 336
Patent
active
057369720
ABSTRACT:
A liquid crystal display apparatus includes first and second PLL circuits, a memory, and a liquid crystal panel. Dot data or line data of a video signal is written into the memory in response to a write clock signal from the first PLL circuit. Data are read from the memory in response to a read clock signal from the second PLL circuit. A read reset signal for reading dummy data is also supplied from the second PLL circuit to the memory. If the number of dot data the video signal has in one horizontal period is smaller than the number of horizontally arranged pixels of the liquid crystal panel, dummy data is read in response to the read reset signal after all the dot data in that one horizontal period have been read. On the other hand, if the number of line data in one vertical period is smaller than the number of vertically arranged pixels of the liquid crystal panel, dummy data is read in response to the read reset signal after all the line data in that one vertical period have been read. As a result, an optimal picture can be displayed on the liquid crystal panel.
REFERENCES:
patent: 5119083 (1992-06-01), Fujisawa et al.
patent: 5136282 (1992-08-01), Inaba et al.
patent: 5598178 (1997-01-01), Kawamori
Kitagishi Hirohisa
Kodama Kazunori
Liang Regina
Sanyo Electric Co,. Ltd.
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