Industry Patents

Patent: 7157694

Integrating Chamber Cone Light Using LED Sources

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Patent Number: 7157694 
Title: Integrating Chamber Cone Light Using LED Sources 
Abstract: A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture.  
Country of Issue: US 
First Named Inventor: May, Rains 
Assignee: Advanced Optical Technologies 
Continuation or Divisional of:  
International Classification: F21V 9/00 
US Classification: 250/228 
Issue Date: 01-02-2007 
Filing Date: 12-06-2005 
Application : 11/294565 
Notes:  
Link to Patent at freepatentsonline.com: 7157694 at Freepatentsonline 
Link to World Patent Family1: World Patent Family at European Patent Office 
Link to Google Patents1: 7157694 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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