Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-05-30
1996-04-23
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 99, 345100, 345197, G09G 336
Patent
active
055108059
ABSTRACT:
A row select driver circuit is used to energize each pixel row sequentially of a liquid crystal display. The output of each row select driver circuit is connected to a corresponding pixel row line and to a succeeding row select driver circuit as an activating input. All the row select driver circuits are integrated with thin-film transistors and deposited on the same glass substrate as the pixels. The number of leads connected to the assembly is much less than the number of pixel rows, including two sets of overlapping clock signals (three each for odd-numbered rows and even-numbered rows offset by one scanning line time) with different pulsewidths and periods twice as long as the scanning line time, a clock signal with a period as long as the scanning line time, a shift-in signal, a positive power supply terminal and at least one ground. These long clock periods precharge the following stage so as to effect a faster deselect time by overcoming the long time constant due to the high series of the thin-film transistors. In one example, the number of leads is reduced from 240 to 11.
REFERENCES:
patent: 5034735 (1991-07-01), Inoue
patent: 5113181 (1992-05-01), Inoue
patent: 5157386 (1992-10-01), Uchida
patent: 5313222 (1994-05-01), Lee
patent: 5376944 (1994-12-01), Mogi
Chang Kent
Hjerpe Richard
Lin H. C.
Prime View International Co.
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