Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2007-04-02
2010-06-29
Lewis, David L (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
Reexamination Certificate
active
07746318
ABSTRACT:
An LCD backlight inverter includes a soft starter for generating a soft-start reference voltage gradually increasing as the driving power begins to be supplied. The LCD backlight inverter also includes a first error detector for receiving a first feedback voltage indicating the magnitude of driving current of the lamp and for comparing a smaller value out of a predetermined first reference voltage and the soft-start reference voltage with the first feedback voltage to generate a first error signal corresponding to the difference between the smaller value and the soft-start reference voltage. The LCD backlight inverter further includes a pulse width modulation comparator for comparing the first error signal and a triangle wave oscillation signal to output the pulse width modulation control signal with a predetermined duty ratio. The LCD backlight inverter prevents application of over-current and over-voltage to the LCD backlight to prolong the lifetime of the backlight.
REFERENCES:
patent: 6151232 (2000-11-01), Furuhashi et al.
patent: 6445143 (2002-09-01), Min
patent: 6504315 (2003-01-01), Kim
patent: 7236375 (2007-06-01), Fukumoto
patent: 2005/0057170 (2005-03-01), Yu et al.
patent: 1620747A (2005-05-01), None
patent: 08-078180 (1996-03-01), None
patent: 10-223391 (1998-08-01), None
patent: 2000-184727 (2000-06-01), None
patent: 10-0431267 (2004-04-01), None
Japanese Patent Office, Office Action issued Dec. 8, 2009.
Chinese Patent Office, Office Action issued Jun. 27, 2008.
Gong Jung Chul
Ha Chang Woo
Min Byoung Own
Shin Sang Cheol
Lewis David L
Lowe Hauptman Ham & Berner
Samsung Electro-Mechanics Co. Ltd
LandOfFree
Liquid crystal display backlight inverter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display backlight inverter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display backlight inverter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4171038