Patent ID: 7173612
Filing Date: 2007-02-06
Classification: G09G

Abstract:
1. An EL display device comprising: a display portion including a plurality of gate lines, to which scan signals are supplied, a plurality of source lines, to which image signals are supplied, and unit pixels arranged in a matrix, each of the unit pixels having an EL element, a driver transistor for controlling, via a current-supplying line, the amount of current supplied to the EL element, and a switching transistor in which switching operation changes with a scan signal, the switching transistor switching, according to change of the switching operation, between conduction and blocking between the source line and a gate electrode of the driver transistor; a source line driver circuit for supplying image signals to the source lines; and a gate line driver circuit for supplying scan signals to the gate lines and outputting, via the gate lines, blanking signals within hold times in which voltages written to the gate electrodes of the driver transistors are held, the blanking signals forcibly stopping a light-emitting state of the EL elements, wherein each unit pixel comprises an auxiliary capacitor having electrodes, one connected to the gate electrode of the driver transistor and the other to a designated gate line among the plurality of gate lines, wherein a designated gate line selected from any one of the plurality of gate lines is connected to anode electrodes of the EL elements via controlling transistors, and cathode electrodes of the EL elements are configured as counter electrodes, the designated gate line also serves as the current-supplying line, and the EL elements are driven to emit light by current flowing from the designated gate line to the EL elements, and the blanking signals are supplied from the designated gate line and are signals set to a voltage level lower than a potential of the cathode electrodes of the EL elements.