The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Nov. 07, 2006

Filed:

Jul. 26, 2004
Applicants:

Peter Richards, San Francisco, CA (US);

Andrew Huibers, Palo Alto, CA (US);

Michel Combes, Santa Cruz, CA (US);

Inventors:

Peter Richards, San Francisco, CA (US);

Andrew Huibers, Palo Alto, CA (US);

Michel Combes, Santa Cruz, CA (US);

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F21V 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method and apparatus for compensating for deficiency in the illumination light from a light source is provided, where the spectrum in the visible range of light from the light source is determined, and a deficiency at a wavelength or band of wavelengths in the visible range of light is determined therefrom, a color sequencing device is provided having a set of filters comprising red, green and blue filter segments, and an additional color balancing filter segment, and wherein a the color balancing segment is constructed so as to preferentially pass a band or bands of wavelengths, which band or bands are determined based on the determined deficiency of the light source.


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