Patent ID: 6445323
Filing Date: 2002-09-03
Classification: G09G

Abstract:
A multi-format sampling register for a data driver for driving data lines of an active matrix display, the sampling register being arranged to operate in either high, or low resolution modes and comprising:(a) sampler input means arranged to receive a digital input containing at least (n+m) bits and representing the switching level of a pixel of the display, where n and m are integers; (b) a first sampler comprising in sampling circuits, each arranged to sample one of m bits of said digital input; (c) a second sampler comprising n sampling circuits, each arranged to sample one of n bits of said digital input, wherein said m bits are more significant than said n bits; and (d) a second sampler switch arranged to switch said second sampler on in said high resolution mode and off in said low resolution mode, so as to ensure that the second sampler consumes substantially no, or at least less, power when the sampling register operates in said low resolution mode.