Industry Patents
Patent: 8497639
Lighting Device with Dynamic Lighting Effects
(Click image for PDF of full patent)
| Patent Number: |
8497639 |
| Title: |
Lighting Device with Dynamic Lighting Effects |
| Abstract: |
The invention provides a lighting device comprising a housing. The
housing comprises visible-light sources (10) arranged to generate visible
light (11), UV-lightsources (12) arranged to generate UV-light (13), a
light exit window (14) positioned to allow transmission of the visible
light (11), a photochromic layer (16) positioned upstream of the light
exit window (14) and downstream of the visible light sources (10), the
photochromic layer (16) comprising at least one area with UV-photochromic
material (15), the UV-photochromic material (15) having a first color
state and a second color state, and a control unit (40) connected to the
UV-light sources (12) for controlling the UV-light sources (12), wherein
the UV-light sources are arranged to illuminate the photochromic layer
(16). The invention makes it possible to obtain dynamic light effects.
|
| Country of Issue: |
US |
| First Named Inventor: |
Tsang, Opran, Pill, Pezzutti |
| Assignee: |
Philips Electronics |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 37/00 |
| US Classification: |
315/291 |
| Issue Date: |
07-30-2013 |
| Filing Date: |
08-03-2009 |
| Application : |
13/057358 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
8497639 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
8497639 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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