Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1993-03-03
1996-02-06
Britton, Howard W.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345147, 345101, G09G 336
Patent
active
054899184
ABSTRACT:
A system for customizing the ramp voltage pulses used to drive an active matrix liquid crystal display. The customized ramp voltage compensates for brightness problems associated with any number of parameters. The V (ramp) also can allow for customized dimming of portions of the display. The standard V (ramp) is replaced with a variable wave form correlated to the timing of the driving of the LCD. The wave form can compensate for changes in brightness caused by off axis viewing angle or can compensate for brightness changes caused by temperature. Also, the system is directed to spatially modulating brightness of pixels for an active matrix LCD to correct color or brightness problems. A driving voltage wave form, which is varied as a function of location on LCD and grey scale is generated to cause selected sets of pixels to be adjusted from an instructed grey scale. Sets of grey scale values are selected to cause the optical characteristics of the display to produce correct color or uniform brightness regardless of the viewing angle.
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Britton Howard W.
Farnandez Kara A.
Montanye G. A.
Murrah M. Lee
Rockwell International Corporation
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