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.
Patent No.:
Date of Patent:
Feb. 14, 2012
Filed:
Dec. 04, 2007
Johannes Petrus Wilhelmus Baaijens, Eindhoven, NL;
Cornelis Antonius Verbakel, Eindhoven, NL;
Johannes Petrus Wilhelmus Baaijens, Eindhoven, NL;
Cornelis Antonius Verbakel, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
In an illumination system (), comprising: a lamp assembly () with a plurality of lamps (A,B,C) and associated lamp drivers (A,B,C); a common controller () for generating control signals (ξ) for the lamp drivers (A,B,C); a memory () containing a color table with color points; the color points of the color table are located in a two-dimensional plane corresponding to a ceiling of a color space. Perimeter color points (PC) are located on the borderline of said plane, in groups of equidistant color points, as measured in a perceptual uniform second color space. Equidistant spoke color points (SC) are located on constant hue lines () in said plane, constant hue line connecting one of said perimeter color points (PC) to a white point (W).