Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-06-16
1995-09-05
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345132, 345204, G09G 336
Patent
active
054482607
ABSTRACT:
A value obtained by adding a back porch period following a vertical sync signal output from a CRT controller to the total number of horizontal display lines of a display resolution is set in a register. A counter counts the value set in the register in synchronism with a horizontal sync signal, and outputs a scanning start signal to a Y driver. With this operation, when a designated display resolution is lower than the physical resolution of an LCD, the scanning start signal is output before scanning of all the physical display lines of the LCD is completed. As a result, upper and lower non-display portions on the LCD display screen are simultaneously scanned.
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Shimamoto Hajime
Zenda Hiroki
Hjerpe Richard
Kabushiki Kaisha Toshiba
Saras Steven J.
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