Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-02-28
2010-11-23
Mengistu, Amare (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S055000, C345S081000
Reexamination Certificate
active
07839367
ABSTRACT:
An active matrix EL display device has pixels comprising an EL display element, a drive transistor and a storage capacitor for storing a voltage to be used for controlling the addressing of the drive transistor. Each pixel also has a light-dependent device for controlling discharge of the storage capacitor, thereby to alter the control of the drive transistor in dependence on the light output of the display element. A circuit is associated with the drive transistor for increasing the rate of discharge of the storage capacitor when the storage capacitor is discharged in response to the light dependent device output. This improvement in the rate of capacitor discharge ensures that good correction for differential aging is obtained at all grey levels.
REFERENCES:
patent: 6392617 (2002-05-01), Gleason
patent: 6441560 (2002-08-01), Hunter
patent: 2001/0055008 (2001-12-01), Young et al.
patent: 2002/0084463 (2002-07-01), Sanford et al.
patent: 2003/0052614 (2003-03-01), Howard
patent: 2003/0214245 (2003-11-01), Yamazaki et al.
patent: 2004/0196221 (2004-10-01), Shih
patent: 2006/0038758 (2006-02-01), Routley et al.
patent: 1096466 (2001-05-01), None
patent: 200120591 (2001-03-01), None
patent: 0213510 (2002-02-01), None
patent: 2005004097 (2005-01-01), None
ISR: PCT/IB05/050728.
Written Opinion: PCT/IB05/050728.
Deane Steven C.
Fish David A.
Koninklijke Philips Electronics , N.V.
Mengistu Amare
Sharifi Koosha
LandOfFree
Active matrix display devices does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Active matrix display devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active matrix display devices will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4232739