Driving circuit and method for AMOLED using power pulse...

Details Driving circuit and method for AMOLED using power pulse... Driving circuit and method for AMOLED using power pulse...

2006-11-14

2010-10-05

Lefkowitz, Sumati (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S204000, C345S211000, C345S082000

Reexamination Certificate

active

07808497

ABSTRACT:
An AMOLED driving circuit and driving method adds an additional switching transistor to a 2T1C driving circuit. An additional switching transistor is connected to the high voltage source, a scan line and a node connected a source terminal of a driving transistor of the 2T1C driving circuit and the light-emitting device. The additional switching transistor and an original switching transistor of the 2T1C driving circuit are activated when the scan line outputs high voltage. At the time, a low voltage of a PWM voltage is added to the high voltage source not to drive the driving transistor, and a storage capacitor stores a voltage of the image data signal. When the two switching transistors turn off and a high voltage of the PWM voltage is provided to the high voltage source, the driving transistor is driven to generate a driving current to the light-emitting device.

REFERENCES:
patent: 7167169 (2007-01-01), Libsch et al.
patent: 7580015 (2009-08-01), Tai et al.
patent: 2003/0107565 (2003-06-01), Libsch et al.

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