Pixel structure using voltage programming-type for active...

Details Pixel structure using voltage programming-type for active... Pixel structure using voltage programming-type for active...

2011-01-18

2011-01-18

Awad, Amr (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

Reexamination Certificate

active

07872620

ABSTRACT:
A pixel structure using a voltage programming type active matrix organic light emitting diode (OLED) which can minimize a current deterioration phenomenon. The pixel structure includes a fifth TFT receiving an external management signal EMS through its gate, having a drain region connected to a cathode part of an OLED, and receiving an input of an OLED current through its source-drain current path when the OLED emits light, a fourth TFT receiving a set scan signal SCAN through its gate and having source and drain regions connected to gate and drain parts of a third TFT T3; respectively, the third TFT T3being a current driving transistor for determining the OLED current when the OLED emits light, a capacitor C having upper and lower plates connected to the gate part of the third TFT T3and a ground voltage VSS.

REFERENCES:
patent: 6392617 (2002-05-01), Gleason
patent: 6937215 (2005-08-01), Lo
patent: 2004/0196239 (2004-10-01), Kwon
patent: 2005/0017934 (2005-01-01), Chung et al.
patent: 2006/0145989 (2006-07-01), Han et al.
RF and Microwave Semiconductor Device Handbook, CRC Press 2003, Chapter 6, section 6.2.2.

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