Active matrix pixel cell with multiple drive transistors and...

Details Active matrix pixel cell with multiple drive transistors and... Active matrix pixel cell with multiple drive transistors and...

2003-11-27

2010-06-15

Nguyen, Chanh (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S206000

Reexamination Certificate

active

07737925

ABSTRACT:
A pixel cell in an active matrix display comprising a current driven emissive element such as an OLED (20) and a data input (17) for receiving an analogue data signal (Vin). The pixel has at least two drive elements (12, 14), each being connected to a power supply (16) and arranged to drive the emissive element in accordance with the data signal, and selecting means (22, 24) for providing, in response to a select signal (21, 23), the data signal to at least one of the drive elements (12, 14). Further, each drive element is adapted to drive the emissive element (20) in a different drive current range in response to a given data signal. Thereby, a required brightness range can be obtained while data voltages too close to the threshold voltage may be avoided.

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patent: WO 0217289 (2002-02-01), None

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