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:
Jan. 29, 2008
Filed:
Jul. 29, 2002
Rene Duijve, Eindhoven, NL;
Rene Duijve, Eindhoven, NL;
Lumileds Lighting US, LLC., San Jose, CA (US);
Abstract
The invention relates to a color photosensor for sensing the color contents of incident light. In order to provide a color photosensor which is cheap to produce and which allows the control of light in as well intensity as color a color photosensor is proposed comprising: a sensing unit () divided into four sensing areas () each sensing the color content of incident light and outputting a sensing current, a filter unit () comprising four filter elements () each being assigned and adapted to one of said sensing areas, said filter elements comprising a cyan colored filter element, a yellow colored filter element and a magenta colored filter element, and a subtraction unit () for separately subtracting each of the three sensing currents outputted from the three sensing areas to which one of said colored filter elements is assigned, from the forth sensing current obtaining color signals proportional to the red, green and blue content of said incident light.