Patent ID: 7145537

Claim:
A driving device for driving pixels of a display from a first gray level to a second gray level, comprising: a first memory for storing a first voltage data making a pixel display the first gray level; a second memory for storing a driving voltage table recording dynamic driving voltages corresponding to predetermined gray level switching, respectively; and a controller for driving the pixel using the dynamic driving voltages, wherein the dynamic driving voltages are selected from the driving voltage table according to the first voltage data of the first memory and a second voltage data provided by an external circuit determining the second gray level that the pixel will display; wherein the pixel displays a highest light transmittance when the first voltage data equals to a V on voltage and the pixel displays a lowest light transmittance when the first voltage data equals to a V off voltage; wherein the range between the highest and the lowest dynamic driving voltages is greater than the range between the V on voltage and the V off voltage.