System and method for providing voltages for a liquid crystal display
OwnerTerence R. Kleininventor
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Abstract
A digital-to-analog converter unit is adapted to apply at an output a pixel charging voltage for a liquid crystal display corresponding to a digital signal. A digital-to-analog converter generates a high resolution signal. An offset generator generates an offset voltage according to an inversion signal and an adder adds the offset voltage to the high resolution signal thus providing the pixel charging voltage.
Claims26
A system for actuating a liquid crystal display (LCD), comprising:
- (a) a matrix of liquid crystal pixels;
- (b) a digital-to-analog converter unit adapted to apply at an output a pixel charging voltage corresponding to a digital signal received at an input and coupled to the matrix to apply the pixel charging voltage to at least one pixel, wherein the digital-to analog converter comprises an offset generator for generating an offset to the pixel charging voltage.
Method of generating a pixel charging voltage, comprising the steps of:
- providing a matrix of liquid crystal pixels;
- during non inversion of the pixel charging voltage:
- generating a first offset voltage;
- adding a high resolution pixel charging voltage to the first offset voltage;
- and
- applying the combined voltage to a pixel;
- during inversion of the pixel charging voltage:
- generating a second offset voltage;
- adding a high resolution pixel charging voltage to the second offset voltage;
- and
- applying the combined voltage to a pixel.
A digital-to-analog converter unit adapted to apply at an output a pixel charging voltage for a liquid crystal display corresponding to a digital signal comprising a digital-to-analog converter generating a high resolution signal, an offset generator for generating an offset voltage and an adder for adding the offset voltage to the high resolution signal thus providing the pixel charging voltage.
Dependencies are inferred from the claim text.