Patent ID: 6677713
Filing Date: 2004-01-13
Classification: G09G,H05B

Abstract:
A driving circuit for a light-emitting device, suitable for using in an active matrix organic light-emitting diode, the driving circuit comprising:a driving transistor, having a gate coupled to a node; a light-emitting device, coupled to the driving transistor in series to form a light-emitting path, wherein the light-emitting path is connected between a system high voltage and a system low voltage, and when the driving transistor is activated, the light-emitting device is driven by the system high voltage to illuminate; a maintaining capacitor, coupled to the node to maintain an on/off state of the driving transistor; and a system driving path, including a first transistor and a second transistor connected to each other in series through the node, wherein the first transistor has a gate receiving a first scan clock pulse, and the second transistor has a gate receiving a second scan clock pulse, the first and second scan clock pulse have the same frequency, while the second scan clock pulse is delayed from the first scan clock pulse by a delay time; wherein when the first transistor is activated by a plurality of pulses of the first scan clock pulse, a data voltage corresponding to one frame is input to the node for controlling activation of the driving transistor to perform image display; and when the second transistor is activated by a plurality of pulses of the second clock pulse, a switch-off voltage is input to the node to switch off the driving transistor.