Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-02-01
2010-02-16
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S082000, C345S055000, C345S036000
Reexamination Certificate
active
07663589
ABSTRACT:
There is disclosed an electro-luminescence display device that is adaptive for preventing picture quality deterioration by operating a thin film transistor for an electro-luminescence cell drive at a non-saturation area to compensate a threshold voltage, and a driving method thereof.An electro-luminescence display device according to an embodiment of the present invention includes an electro-luminescence cell connected between a first supply voltage source and a ground voltage source to emit light by a current supplied from the first supply voltage source; a cell driver formed every intersection of gate lines and data lines and connected between the first supply voltage source and the electro-luminescence cell to control a current flowing in the pixel cell; and a pulse supplier supplies to the electro-luminescence cell a pulse amplitude modulation signal which is divided to have N (N is a natural number) numbers of different voltage levels from each other, and wherein the driving thin film transistor operates at the non-saturation region.
REFERENCES:
patent: 5990629 (1999-11-01), Yamada et al.
patent: 1216135 (1999-05-01), None
patent: 10-2003-0004048 (2003-01-01), None
Ha Won Kyu
Kim Hak Su
Kim Hyun Joung
Kim Ki Heon
Lee Jae Do
Birch & Stewart Kolasch & Birch, LLP
Hjerpe Richard
LG Electronics Inc.
Shapiro Leonid
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