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:
Apr. 02, 2013
Filed:
Mar. 22, 2010
Anatoly Shteynberg, San Jose, CA (US);
Dongsheng Zhou, San Jose, CA (US);
Harry Rodriguez, Gilroy, CA (US);
Mark Eason, Hollister, CA (US);
Bradley M. Lehman, Belmont, MA (US);
Stephen F. Dreyer, Santa Clara, CA (US);
Thomas J. Riordan, Los Altos, CA (US);
Anatoly Shteynberg, San Jose, CA (US);
Dongsheng Zhou, San Jose, CA (US);
Harry Rodriguez, Gilroy, CA (US);
Mark Eason, Hollister, CA (US);
Bradley M. Lehman, Belmont, MA (US);
Stephen F. Dreyer, Santa Clara, CA (US);
Thomas J. Riordan, Los Altos, CA (US);
Point Somee Limited Liability Company, Dover, DE (US);
Abstract
An apparatus, method, and system are disclosed for providing AC line power to lighting devices such as light emitting diodes ('LEDs'). A representative apparatus comprises: a plurality of LEDs coupled in series to form a first plurality of segments of LEDs; a plurality of switches coupled to the plurality of segments of LEDs to switch a selected segment into or out of a series LED current path in response to a control signal; a current sensor; and a controller which, in response to a first parameter and during a first part of an AC voltage interval, generates a first control signal to switch a corresponding segment of LEDs into the series LED current path; and during a second part of the AC voltage interval, generates a second control signal to switch the corresponding segment of LEDs out of the first series LED current path.