Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate
2004-10-05
2008-03-25
Luu, Thanh X (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
C250S216000
Reexamination Certificate
active
07348530
ABSTRACT:
In one embodiment, apparatus is provided with a light source, an optic element, at least one photosensor, and a control system. The optic element has a reflective material on a surface thereof, and is positioned to receive and reflect light emitted by the light source. The at least one photosensor is mounted to the surface of the optic element on which the reflective material resides, over a portion of the optic element on which the reflective material does not reside. The control system is operably associated with both the photosensor(s) and the light source, to regulate the light source's light output in accordance with measurements received from the photosensor(s).
REFERENCES:
patent: 5146516 (1992-09-01), Blumke et al.
patent: 5451765 (1995-09-01), Gerber
patent: 6124956 (2000-09-01), Severn
patent: 6344641 (2002-02-01), Blalock et al.
patent: 6448550 (2002-09-01), Nishimura
patent: 6481856 (2002-11-01), Weissman et al.
patent: 6507159 (2003-01-01), Muthu
patent: 6587214 (2003-07-01), Munks
patent: 6865309 (2005-03-01), Dho
patent: 2002/0113192 (2002-08-01), Antila
patent: 2002/0190194 (2002-12-01), Birrer et al.
Ken A. Nishimura, “Feed-Forward Methods and Apparatus for Setting the Light Intensities of One or More LEDS”, U.S. Appl. No. 10/897,892, filed Jul. 23, 2004.
Ken A. Nishmura, “Mixed-Color Light Emitting Diode Apparatus, and Method for Making Same”, U.S. Appl. No. 10/918,149, filed Aug. 13, 2004.
Ken A. Nishimura, “Methods and Apparatus for Regulating the Drive Currents of a Plurality of Light Emitters”, U.S. Appl. No. 10/938,998, filed Sep. 10, 2004.
Craig C. Freudenrich, “How Projection Television Works”, http://electronics.howstuffworks.com, Aug. 18, 2004, 17 pages.
Murade et al., U.S. Appl. No. 2002/0063676, May 30, 2002.
Cheang Felix Tak Meng
Ko Choon Guan
Ng Fook Chuin
Avago Technologies ECBU IP Pte Ltd
Luu Thanh X
LandOfFree
System, method and apparatus for regulating the light... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System, method and apparatus for regulating the light..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System, method and apparatus for regulating the light... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3970089