Industry Patents
Patent: 7703943
Color Tunable Light Source
(Click image for PDF of full patent)
| Patent Number: |
7703943 |
| Title: |
Color Tunable Light Source |
| Abstract: |
A color tunable light source comprises: a first light emitting diode (LED)
arrangement operable to emit light of a first color and a second LED
arrangement operable to emit light of a second color, the combined light
output comprising the output of the source. One or both LED arrangements
comprises a phosphor provided remote to an associated LED operable to
generate excitation energy of a selected wavelength range and to
irradiate the phosphor such that it emits light of a different color
wherein light emitted by the LED arrangement comprises the combined light
from the LED and phosphor and control means operable to control the color
by controlling the relative light outputs of the two LED arrangements.
The color can be controlled by controlling the relative magnitude of the
drive currents of the LEDs or by controlling a duty cycle of PWM drive
current.
|
| Country of Issue: |
US |
| First Named Inventor: |
Li, Dong, Xu, Collier |
| Assignee: |
Intematix |
| Continuation or Divisional of: |
|
| International Classification: |
F21V 9/00 |
| US Classification: |
362/231 |
| Issue Date: |
04-27-2010 |
| Filing Date: |
05-07-2007 |
| Application : |
11/800976 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
7703943 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
7703943 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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