Industry Patents
Patent: 7520634
Methods and Apparatus For Controlling a Color Temperature of Lighting Conditions
(Click image for PDF of full patent)
| Patent Number: |
7520634 |
| Title: |
Methods and Apparatus For Controlling a Color Temperature of Lighting Conditions |
| Abstract: |
Methods and apparatus in which at least one first LED generates first
radiation having a first spectrum, and at least one second LED generates
second radiation having a second spectrum different than the first
spectrum. One or more controllers control at least one of the first
radiation and the second radiation so as to control at least a color
temperature of visible radiation. In one example, one or more sensors
monitor at least one characteristic of sample radiation and provide one
or more sensor signals to the one or more controllers, which in turn
control at least the color temperature of the visible radiation based at
least in part on the at least one sensor signal. In various
implementations, the sample radiation may be ambient illumination (e.g.,
natural-light and/or light from other light sources), may be the visible
radiation itself (e.g., to provide feedback to the one or more
controllers), or generally any desired lighting condition to simulate.
|
| Country of Issue: |
US |
| First Named Inventor: |
Ducharme, Morgan, Lys, Dowling, Mueller |
| Assignee: |
Philips SSL |
| Continuation or Divisional of: |
7014336 |
| International Classification: |
F21V 23/04 |
| US Classification: |
362/276 |
| Issue Date: |
04-21-2009 |
| Filing Date: |
12-30-2005 |
| Application : |
11/322891 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7520634 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7520634 at Google Patents |
1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.
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