Industry Patents
Patent: 6636003
Apparatus and Method for Adjusting the Color Temperature of White Semiconductor Light Emitters
(Click image for PDF of full patent)
| Patent Number: |
6636003 |
| Title: |
Apparatus and Method for Adjusting the Color Temperature of White Semiconductor Light Emitters |
| Abstract: |
An LED arrangement which produces a color temperature adjustable white
light. The LED arrangement includes one or more white LEDs and a first
drive circuit operable to supply a first drive current to the one or more
white LEDs such that a white light is output at a desired intensity. The
LED arrangement further includes one or more colored LEDs arranged such
that a light output from the one or more colored LEDs combines with the
white light to produce a resultant light having a desired color
temperature. The colored LEDs are driven by a second drive circuit which
supplies a second drive current to the one or more colored LEDs such that
a colored light is output at a desired intensity, the intensity of the
colored light output from the one or more colored LEDs being adjustable so
as to adjust the color temperature of the resultant light.
|
| Country of Issue: |
US |
| First Named Inventor: |
Rahm, McGrath |
| Assignee: |
Color Kinetics |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 35/00 |
| US Classification: |
315/179 |
| Issue Date: |
10-21-2003 |
| Filing Date: |
09-06-2001 |
| Application : |
09/948209 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
6636003 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6636003 at Google Patents |
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after the patent has issued - they take a while to get new patents in their systems.
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