Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1998-02-20
2000-03-21
Brier, Jeffery
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 89, 345211, G09G 336
Patent
active
060408154
ABSTRACT:
A column-driver integrated circuit, and related method, for driving the columns of LCD displays uses paired digital-to-analog converters to provide analog signals in an upper voltage range and in a lower voltage range. During a first drive cycle, first and second digital data words are provided to the first and second digital-to-analog converters; the first and second digital data words represent the magnitudes, within the upper voltage range and lower voltage range, respectively, of the analog signals to be driven onto first and second columns of the LCD display. The analog signal generated by the first D/A converter is selected, as by a multiplexer, onto the first column of the display, and the analog signal generated by the second D/A converter is selected onto the second column of the display. During a second subsequent drive cycle, first and second digital data words are again provided to the first and second D/A converters, but now the first and second digital data word represent the magnitudes, within the upper voltage range and lower voltage range, respectively, of the analog signals to be driven onto the second and first columns, respectively, of the LCD display. The analog signal generated by the first D/A converter during the second drive cycle is selected onto the second column of the display, and the analog signal generated by the second D/A converter is selected onto the first column of the display.
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Erhart Richard Alexander
Kozicek James Richard
Brier Jeffery
Vivid Semiconductor, Inc.
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