| 摘要 |
<P>PROBLEM TO BE SOLVED: To keep a threshold voltage of a driving transistor stable even after over a long operation time of an image display. <P>SOLUTION: This driving circuit for a light emitting device has the driving transistor, first and second transistors and a retaining capacitor. The light emitting device is connected to the driving transistor in series to form a light emitting path. An on/off state of the driving transistor determines a conductive state and an on/off state of the light emitting path. The first transistor has a source region connected to a data line, a drain region connected to a gate of the driving transistor, and the gate connected to the first scanning line. The second transistor has a source region connected to a reference low voltage point, a drain region connected to a gate of the driving transistor, and the gate connected to the second scanning line. Pulses of the first and second scanning lines have a same frequency, and there is a delayed time therebetween. The capacitor for retaining is connected to the gate of the driving transistor to retain the voltage state. <P>COPYRIGHT: (C)2004,JPO |
