| 摘要 |
<P>PROBLEM TO BE SOLVED: To compensate for a deviation in a threshold voltage and mobility of a transistor so that a data line can be rapidly charged in pixel circuits of a light-emitting display device. <P>SOLUTION: The light-emitting display device has a driving transistor for controlling a driving current to an organic EL element. A first capacitor is connected between a gate and a source of the driving transistor, and a second capacitor is connected between the gate thereof and a boosting scan line. The respective pixel circuits are selected and a data current for setting the brightness is sent thereto and the data line is charged within the prescribed time. The voltage undergoing a current to voltage conversion is thereafter stored in the first capacitor. Next, when a voltage level of the boost scan line is changed, the stored voltage of the first capacitor is decreased by the voltage division of the first and second capacitors. The slight current corresponding to the voltage after the decrease is supplied from the driving transistor to the organic EL element and the organic EL element emits light with the desired brightness. As a result, the signal delay by the parasitic capacitor of the data line can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
