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:
Dec. 13, 2011
Filed:
Oct. 16, 2009
Will Shatford, Pasadena, CA (US);
Waqidi Falicoff, Stevenson Ranch, CA (US);
William A. Parkyn, Lomita, CA (US);
Yupin Sun, Yorba Linda, CA (US);
Will Shatford, Pasadena, CA (US);
Waqidi Falicoff, Stevenson Ranch, CA (US);
William A. Parkyn, Lomita, CA (US);
Yupin Sun, Yorba Linda, CA (US);
Light Prescriptions Innovators, LLC, Altadena, CA (US);
Abstract
In one method of and apparatus for varying the luminosity of illumination, each of a plurality of light sources has an on state in which it emits light and an off state in which it does not emit light. Each of the plurality of light sources is switched cyclically between the on state and the off state in a sequence over a cycle period. The switching sequence is selected such that the number of said light sources that are on is uniform over the cycle. The luminosity of the illumination is varied by varying the proportion of each cycle for which each light source is switched on.