Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-12-04
2010-06-01
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S084000, C345S087000, C345S691000
Reexamination Certificate
active
07728809
ABSTRACT:
A method for driving an LED backlight device using pulse width modulation with an additional timer to manage the power consumption, thermal output, and lighting level of the device with improved resolution. The method includes receiving a commanded brightness level, and using an n bit pulse width modulator that has a nominal time period (Pn) to assert a plurality of pulses in accordance with an output of the n bit pulse modulator. A modulator output value is assigned to each one of K states of a K state timer that has a timer period (PT). The plurality of pulses is output according to the modulator output value during each nominal time period occurring within the timer period. Power to the display is supplied in accordance with the plurality of pulses.
REFERENCES:
patent: 5023535 (1991-06-01), Miller et al.
patent: 5248900 (1993-09-01), Davis
patent: 5440208 (1995-08-01), Uskali et al.
patent: 5577235 (1996-11-01), Mitra
patent: 5589805 (1996-12-01), Zuraski et al.
patent: 5803579 (1998-09-01), Turnbull et al.
patent: 5889424 (1999-03-01), Iwata et al.
patent: 5912568 (1999-06-01), Kiley
patent: 6016326 (2000-01-01), Claisse et al.
patent: 6049703 (2000-04-01), Staudinger et al.
patent: 6061218 (2000-05-01), Ida et al.
patent: 6087969 (2000-07-01), Stockstad et al.
patent: 6138047 (2000-10-01), Proffitt et al.
patent: 6182235 (2001-01-01), Ma et al.
patent: 6191868 (2001-02-01), Shibuya et al.
patent: 6232963 (2001-05-01), Tew et al.
patent: 6239716 (2001-05-01), Pross et al.
patent: 6342997 (2002-01-01), Khadkikar et al.
patent: 6362578 (2002-03-01), Swanson et al.
patent: 6396486 (2002-05-01), Kuo et al.
patent: 6445790 (2002-09-01), Burgan et al.
patent: 6636003 (2003-10-01), Rahm et al.
patent: 6727765 (2004-04-01), Ess
patent: 6995518 (2006-02-01), Havlik et al.
patent: 7187705 (2007-03-01), Richmond
patent: 7230971 (2007-06-01), Beard
patent: 2002/0030455 (2002-03-01), Ghanem
patent: 2003/0222587 (2003-12-01), Dowling, Jr. et al.
patent: 04-096417 (1992-03-01), None
patent: WO 01/27910 (2001-04-01), None
Lewis, R.; USPTO Office Action dated Dec. 18, 2009, U.S. Appl. No. 11/621,467.
Hjerpe Richard
Honeywell International , Inc.
Ingrassia Fisher & Lorenz P.C.
Said Mansour M
LandOfFree
Method, apparatus and computer program product for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method, apparatus and computer program product for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method, apparatus and computer program product for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4167638