Computer graphics processing and selective visual display system – Display driving control circuitry – Waveform generator coupled to display elements
Reexamination Certificate
2009-02-20
2011-11-08
Edun, Muhammad N (Department: 2627)
Computer graphics processing and selective visual display system
Display driving control circuitry
Waveform generator coupled to display elements
C345S055000, C345S077000, C345S063000
Reexamination Certificate
active
08054305
ABSTRACT:
A correction circuit includes a timing control circuit for dividing a drive period assigned for drive of display devices into plural calculation slots, a luminance calculation circuit for calculating luminance including an effect of a voltage drop for each calculation slot, an accumulation circuit for temporally accumulating the luminance for each calculation slot, a corrected data determination circuit for outputting, as a corrected data, the value determined in accordance with the calculation slot at the time point when the accumulated luminance reaches a target luminance value, and a conversion circuit for converting the corrected data into modulation data to be applied to a modulation circuit. The width of the calculation slot is shorter than the width of the slot for pulse width modulation in at least a part of the drive period. The conversion circuit reduces the bit width of the corrected data by pseudo-gradation processing.
REFERENCES:
patent: 5659328 (1997-08-01), Todokoro et al.
patent: 5734361 (1998-03-01), Suzuki et al.
patent: 6580407 (2003-06-01), Suzuki et al.
patent: 6653794 (2003-11-01), Sagano et al.
patent: 6842160 (2005-01-01), Yamazaki et al.
patent: 6870522 (2005-03-01), Sagano et al.
patent: 6873308 (2005-03-01), Sagano et al.
patent: 6952193 (2005-10-01), Abe et al.
patent: 7046219 (2006-05-01), Kanai et al.
patent: 7079161 (2006-07-01), Sagano et al.
patent: 7154457 (2006-12-01), Sagano et al.
patent: 7315314 (2008-01-01), Sagano et al.
patent: 7417610 (2008-08-01), Abe et al.
patent: 7432884 (2008-10-01), Kanai et al.
patent: 2003/0006976 (2003-01-01), Sagano et al.
patent: 2003/0011545 (2003-01-01), Sagano et al.
patent: 2003/0030654 (2003-02-01), Sagano et al.
patent: 2003/0107542 (2003-06-01), Abe et al.
patent: 2004/0257311 (2004-12-01), Kanai et al.
patent: 2005/0007328 (2005-01-01), Yamazaki et al.
patent: 2005/0190119 (2005-09-01), Yamazaki et al.
patent: 2006/0017718 (2006-01-01), Sagano et al.
patent: 2006/0192493 (2006-08-01), Kanai et al.
patent: 2006/0256142 (2006-11-01), Sagano et al.
patent: 2009/0009450 (2009-01-01), Abe et al.
patent: 2009/0219308 (2009-09-01), Sagano
patent: 2009/0244037 (2009-10-01), Sagano
patent: 2-257553 (1990-10-01), None
patent: 7-181911 (1995-07-01), None
patent: 8-248920 (1996-09-01), None
patent: 2003-223131 (2003-08-01), None
patent: 2003-233344 (2003-08-01), None
patent: 2005-31636 (2005-02-01), None
Canon Kabushiki Kaisha
Edun Muhammad N
Fitzpatrick ,Cella, Harper & Scinto
LandOfFree
Image display apparatus, correction circuit thereof 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 Image display apparatus, correction circuit thereof and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image display apparatus, correction circuit thereof and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4281350