Optical and temperature feedbacks to control display brightness

Details Optical and temperature feedbacks to control display brightness Optical and temperature feedbacks to control display brightness

2007-02-27

2007-02-27

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S149000, C315S309000, C345S102000

Reexamination Certificate

active

10937889

ABSTRACT:
An illumination control circuit allows a user to set a desired brightness level and maintains the desired brightness level over temperature and life of a light source. The illumination control circuit uses a dual feedback loop with both optical and thermal feedbacks. The optical feedback loop controls power to the light source during normal operations. The thermal feedback loop overrides the optical feedback loop when the temperature of the light source becomes excessive.

REFERENCES:
patent: 3449629 (1969-06-01), Wigert et al.
patent: 5089748 (1992-02-01), Ihms
patent: 5440208 (1995-08-01), Uskaly et al.
patent: 5493183 (1996-02-01), Kimball
patent: 5754013 (1998-05-01), Praiswater
patent: 5760760 (1998-06-01), Helms
patent: 5786801 (1998-07-01), Ichise
patent: 6069448 (2000-05-01), Yeh
patent: 6157143 (2000-12-01), Bigio et al.
patent: 6198234 (2001-03-01), Henry
patent: 6252355 (2001-06-01), Meldrum et al.
patent: 6255784 (2001-07-01), Weindorf
patent: 6313586 (2001-11-01), Yamamoto et al.
patent: 6388388 (2002-05-01), Weindorf et al.
patent: 6396217 (2002-05-01), Weindorf
patent: 6424100 (2002-07-01), Kominami et al.
patent: 6479810 (2002-11-01), Weindorf
patent: 6483245 (2002-11-01), Weindorf
patent: 6507286 (2003-01-01), Weindorf et al.
patent: 6521879 (2003-02-01), Rand et al.
patent: 6563479 (2003-05-01), Weindorf et al.
patent: 6642674 (2003-11-01), Liao et al.
patent: 6664744 (2003-12-01), Dietz
patent: 6703998 (2004-03-01), Kabel et al.
patent: 6717375 (2004-04-01), Noguchi et al.
patent: 6816142 (2004-11-01), Oda et al.
patent: 2002/0118182 (2002-08-01), Weindorf
patent: 2002/0130786 (2002-09-01), Weindorf
patent: 2003/0025462 (2003-02-01), Weindorf
patent: 2003/0227435 (2003-12-01), Hsieh
patent: 2004/0012556 (2004-01-01), Yong et al.
patent: 2004/0145558 (2004-07-01), Cheng
Nguyen, Don J., “Optimizing Mobile Power Delivery”. Presented at Intel Developers Forum, Fall 2001, p. 4.
Tannas, Lawrence, “Flat Panel Displays and CRTs”. © 1985 Van Nostrand Reinhold Company Inc., pp. 96-99.

Affiliated with

Also associated with

Rating

Optical and temperature feedbacks to control display brightness does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical and temperature feedbacks to control display brightness, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical and temperature feedbacks to control display brightness will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3832541