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. 12, 2016
Filed:
Apr. 15, 2014
Nxp B.v., Eindhoven, NL;
Leendert Van Den Broeke, Malden, NL;
NXP B.V., Eindhoven, NL;
Abstract
Controllers ('), lighting circuits and methods are disclosed, for a dimmable LED lighting circuit having a series arrangement of two types of LED, the controller comprising a control circuit (), a bypass circuit () and optionally a further bypass circuit and being operable for controlling a current, the current (Idriver) being separable into first and second parts (I, I), and into further first and second parts, wherein the controller is configured to direct the (further) first part through the LED or LEDs of the second (first) type and direct the (further) second part through the (further) bypass circuit (respectively), and wherein the control circuit is configured to adjust the ratio between the first, or further first, part and the second, or further second respectively, part in dependence on a dimming level of the LED lighting circuit.