Pixel circuit

Details Pixel circuit Pixel circuit

2011-03-22

2011-03-22

Mengistu, Amare (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S082000, C345S214000

Reexamination Certificate

active

07911459

ABSTRACT:
A pixel circuit has a light emitting diode, a driving transistor, a capacitor, and a first switch. The light emitting diode had a first end to receive a first supply voltage. The driving transistor has a source and drain respectively receiving a second supply voltage and coupled to a second end of the light emitting diode. The capacitor has a first end coupled to a gate of the driving transistor and a second end receiving a reference voltage. The first switch is controlled by a first scan signal to couple the source of the driving transistor to the second end of the capacitor. The pixel circuit operates in a pre-charge period, a programming period, and an emission period sequentially, and the first scan signal is asserted to turn on the first switch during the pre-charge and emission periods.

REFERENCES:
patent: 2005/0017934 (2005-01-01), Chung et al.
patent: 2005/0243076 (2005-11-01), Kim et al.
patent: 2006/0063298 (2006-03-01), Winters
patent: 2006/0066251 (2006-03-01), Sim
patent: 2006/0114196 (2006-06-01), Shin et al.
patent: 2007/0296672 (2007-12-01), Kim et al.

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