Abstract
Modern flat panel displays, including thin-film transistor liquid crystal
displays (TFT-LCDs) and organic light-emitting diodes (OLEDs), pursue more
and more natural color expression. This requires the data driving system should
produce very fine and accurate signal voltages or currents. Especially, the
uniformity among channels of a driving system is critically important because
the color or luminance differences among columns are easily noticeable. We
propose a simple and efficient driving method for solving the artifacts caused
by the existing nonuniformity among channels of a driving system, and confirms
its impact by simulations using C-programming. The nonuniformity among channels
mostly stem from the random offset of the output circuits of a driving system,
which in turn is caused by the process variations. The proposed driving method
shares $N$-output circuits
between $N$-output channels
such that the existing offsets of the channels are averaged out. Thus, the
output signal error due to the offsets spreads out among the channels, improving
the uniformity between the channels.
© 2006 IEEE
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