Load adaptive column driver

Details Load adaptive column driver Load adaptive column driver

2005-06-21

2005-06-21

Wu, Xiao (Department: 2674)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S087000, C345S098000, C345S099000, C345S100000, C315S169200, C315S169300, C327S277000, C361S152000

Reexamination Certificate

active

06909427

ABSTRACT:
A column driver system and method for driving a plurality of column drivers in an active matrix display. The system comprises: a register in each column driver for holding a pixel value; a system that generates a shared ramp signal for the plurality of column drivers; a system that samples the shared ramp signal for each possible pixel value; and a load characteristic correction system that adaptively adjusts the shared ramp signal in anticipation of a load error associated with at least one pixel value. The load characteristic correction system comprises: a data collection system that collects pixel data for each of the plurality of column drivers and determines a number of occurrences of all possible pixel values; a load analysis system that identifies error conditions based on the number of occurrences; and a signal modification system that determines a correction to the ramp signal when an error condition is identified.

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