SYSTEM AND METHOD FOR PROVIDING GREY SCALE VOLTAGES FOR A LIQUID CRYSTAL DISPLAY

摘要

A matrix of liquid crystal pixels (160) is provided. A digital-to-analog converter (DAC) is coupled to the matrix and produces an output voltage that can be applied to one or more pixels in the matrix. The DAC receives a multi-bit digital input and generates its output voltage to correspond to the digital input. The conversion function of the DAC is adapted to have a higher resolution within a voltage range in which most grayshade changes of the LCD occur. A means for carrying out the conversion function first and second DACs (220, 210). From the first DAC (220), one of a plurality of base voltages may be output. Added to the base voltage is a change voltage (Delta V) generated by the second DAC (210), and this may be selected to have one of a plurality of different resolutions.