Patent ID: 7154489
Filing Date: 2006-12-26
Classification: G09G

Abstract:
1. A drive control apparatus for a display panel comprising: a drive circuit for supplying a modulation signal to a modulation wiring of the display panel, having a modulator for generating the modulation signal in which at least a pulse width thereof is modulated based on inputted luminance data; a selection circuit for selecting a scanning wiring of the display panel; and a modulation clock supplying circuit for supplying a modulation clock serving as a criterion for determining the pulse width of the modulation signal to the modulator, wherein the modulator modulates the pulse width of the modulation signal in synchronization with the modulation clock, the modulation clock supplying circuit supplies the modulation clock which has a frequency deviation to spread harmonics spectrum as compared to a virtual source clock of a constant frequency, and the frequency deviation is so restricted that, if at least two pixels corresponding to two adjacent scanning wirings are displayed based on arbitrary same luminance data, a difference between a display luminance of one pixel in a specified period and a display luminance of the other pixel in the specified period is less than or equal to a tolerable value determined by the luminance data.