Patent ID: 6707438
Filing Date: 2004-03-16
Classification: G09G

Abstract:
An apparatus for driving a multi-color light-emitting display panel including a plurality of drive lines and a plurality of scanning lines intersecting with each other, and a plurality of capacitive light-emitting elements having polarities connected to said scanning lines and said drive lines at a plurality of intersections of said drive lines and said scanning lines, and being divided into a plurality of types by a color of light emission, said capacitive light-emitting elements of the same color type being arranged on each of said plurality of drive lines, comprising:scanning means for selectively supplying one of a first potential and a second potential higher than said first potential to each of said plurality of scanning lines; drive means for selectively supplying one of an output of a current source for applying drive current and a third potential for an offset voltage, equal to or less than a light emission threshold voltage of said element, to each of said plurality of drive lines; and control means for repeatedly setting a scanning period to select one scanning line of said plurality of scanning lines and a subsequent reset period in accordance with a scan timing of input image data, and for designating at least one drive line of said plurality of drive lines corresponding to at least one capacitive light-emitting element which should be emitted light on said one scanning line during said scanning period in accordance with said input image data, wherein said scanning means supplies, during said scanning period, the first potential to said one scanning line and said second potential to scanning lines other than said one scanning line, and supplies, during said reset period, said first potential to all scanning lines, said drive means supplies, during said scanning period, said drive current to said at least one drive line to apply a positive voltage not less than said light emission threshold voltage to said at least one capacitive light-emitting element in the forward direction, and supplies, during said reset period, said third potential to at least one subsequent drive lines to be designated to apply an offset voltage not higher than said light emission threshold voltage to at least one capacitive light-emitting element which should be allowed to emit light during the next scanning period, and said drive current and said third potential are made variable for each type of said capacitive light-emitting elements.