Patent ID: 6756961
Filing Date: 2004-06-29
Classification: G09G

Abstract:
A display device comprising:an array of liquid crystal pixels arranged in rows and columns; and column address circuitry provided for generating the pixel drive signals, each column of pixels including a column conductor to which pixel drive signals are provided to pixels in the column, the column address circuitry including: circuitry for generating all defined drive signal levels on corresponding separate signal level lines; and a buffer associated with each signal level line, the outputs of the buffers being selectably switchable onto the columns as the pixel drive signals, the column address circuitry further including a memory for storing values corresponding to the drive signal levels to be provided to each column, the buffers controlled in dependence on the stored values, the display device further comprising an additional buffer used when a quantity of columns to which an individual buffer output is to be switched exceeds half a total quantity of columns.