Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-01-15
2008-01-15
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S082000, C315S169100
Reexamination Certificate
active
07319443
ABSTRACT:
In a display device having a light emitting element, an accurate setting operation needs much time, unless a current value of the signal current (video signal) is set to high value. On the contrary, the driving current value for causing a light emitting element to emit light is very small. Therefore, it is difficult to perform an accurate setting operation. However, according to the present invention, the current source circuit includes plural transistors. The plural transistors are connected in parallel when the setting operation is performed on the current source circuit, whereas the plural transistors are connected in series when the light emitting element is caused to emit light. Further, the speed of the setting operation is increased because a light emitting element is capable of emitting light with a constant luminance and a current value to set up a current source circuit is higher than a driving current value when a light emitting element emits light.
REFERENCES:
patent: 5952789 (1999-09-01), Stewart et al.
patent: 6229506 (2001-05-01), Dawson et al.
patent: 6229508 (2001-05-01), Kane
patent: 6229606 (2001-05-01), Way et al.
patent: 6348906 (2002-02-01), Dawson et al.
patent: 6501466 (2002-12-01), Yamagishi et al.
patent: 6535185 (2003-03-01), Kim
patent: 6798148 (2004-09-01), Inukai
patent: 7138967 (2006-11-01), Kimura
patent: 2003/0058195 (2003-03-01), Adachi et al.
patent: 2003/0090447 (2003-05-01), Kimura
patent: 2003/0133243 (2003-07-01), Imamura
patent: 2003/0164685 (2003-09-01), Inukai
patent: 1312535 (2001-09-01), None
patent: 0 905 673 (1999-03-01), None
patent: 1 132 882 (2002-06-01), None
patent: 1 341 148 (2003-09-01), None
patent: 2001-147659 (2001-05-01), None
patent: 2003-066909 (2003-03-01), None
patent: 2003-255896 (2003-09-01), None
patent: 2003-263130 (2003-09-01), None
patent: WO 00/19476 (2000-04-01), None
International Application No. PCT/JP03/11094 Search and Examination Report dated Oct. 28, 2003 (6 pages).
Inukai Kazutaka
Kimura Hajime
Fish & Richardson P.C.
Hjerpe Richard
Nguyen Kimnhung
Semiconductor Energy Laboratory Co,. Ltd.
LandOfFree
Current source circuit, display device using the same and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current source circuit, display device using the same and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current source circuit, display device using the same and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2779200