Patent ID: 7369113
Filing Date: 2008-05-06
Classification: G09G

Abstract:
1. A driving device for driving a display device provided with a display screen, having a plurality of scanning signal lines and a plurality of data signal lines crossing each other, in which an image display data signal is outputted to a pixel provided at each of crossings through each of the data signal lines in synchronism with a scanning signal outputted from each of the scanning signal lines, said driving device comprising: a data signal line driving circuit including a shift register which has (i) multiple stages of flip-flops each of which operates in synchronism with a source clock signal and (ii) a level shifter for boosting the source clock signal whose amplitude is smaller than a driving voltage of each of the flip-flops so as to apply the driving voltage to the flip-flop, said data signal line driving circuit causing a sampling circuit to sample the image display data signal based on an output from the shift register so as to output the image display data signal to the data signal line; and control means for causing a frequency of the source clock signal in case of displaying an image to be higher than a frequency of the source clock signal in case of normal display in which multi-gradation display is performed in a full-color mode.