Active matrix LED display driving circuit

Details Active matrix LED display driving circuit Active matrix LED display driving circuit

2005-12-13

2005-12-13

Lefkowitz, Sumati (Department: 2675)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S084000, C345S204000, C315S169100

Reexamination Certificate

active

06975293

ABSTRACT:
An active matrix LED display driving circuit. The circuit comprises a first transistor having a drain, a source coupled to receive a data signal and a gate coupled to receive a scan signal and, a second transistor having a drain, a source coupled to receive the data signal and a gate coupled to receive the scan signal, a third transistor having a source, a drain coupled to the drain of the second transistor and a gate coupled to the drain of the first transistor, a fourth transistor having a drain coupled to receive a first voltage, and a gate coupled to receive the scan signal and a source coupled to the drain of the second transistor, a light emitting diode having an anode coupled to the source of the third transistor and a cathode coupled to receive a second voltage, and a capacitor coupled between the gate and source of the third transistor.

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patent: 2004/0129933 (2004-07-01), Nathan et al.

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