Industry Patents
Patent: 6139166
Luminaire Having Beam Splitters for Mixing Light from Different Color LEDs
(Click image for PDF of full patent)
| Patent Number: |
6139166 |
| Title: |
Luminaire Having Beam Splitters for Mixing Light from Different Color LEDs |
| Abstract: |
Apparatus for mixing light from discrete LED light sources utilizes beam
splitters which each have a semi-reflective layer which partially
transmits and partially reflects light of any wavelength incident thereon.
Each semi-reflective layer is situated in a transparent prismatic black
between reflective surfaces on parallel outside faces of the block so that
two parallel input beams are mixed and transmitted as two parallel mixed
beams of like color. For a square array of light sources, a first mixing
stage consists of two such prismatic blocks arranged side-by-side, and a
second mixing stage consists of two such prismatic blocks arranged
side-by-side and rotated 90 degrees to the first stage. The second stage
is arranged to receive a square array of mixed beams and produces four
identical output beams. The colors of the light sources are chosen so that
all output beams are white.
|
| Country of Issue: |
US |
| First Named Inventor: |
Marshall, Pashley, Keuper |
| Assignee: |
Lumileds Lighting, Philips |
| Continuation or Divisional of: |
|
| International Classification: |
F21V 9/00 |
| US Classification: |
362/231 |
| Issue Date: |
10-31-2000 |
| Filing Date: |
06-24-1999 |
| Application : |
09/338997 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
6139166 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
6139166 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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