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:
Nov. 06, 2018
Filed:
Sep. 22, 2017
Linear Technology Holding, Llc, Norwood, MA (US);
Lucas Andrew Milner, San Jose, CA (US);
Joshua William Caldwell, Los Gatos, CA (US);
Hezekiel Dakjung Randolph, Sunnyvale, CA (US);
Linear Technology Holding, LLC, Nonwood, MA (US);
Abstract
Techniques are provided for low, or deep, dimming of a light-emitting diode (LED) load. In an example, a method for deep dimming a light-emitting diode (LED) load can include, when a current of an inductor does not reach a target current by the end of an on-time of a pulse-width modulation (PWM) switch cycle, and, during an initial on-time of the PWM switch cycle, allowing the current of the inductor to reach the target current during a next 'off' time interval of the PWM switch cycle, wherein the inductor is coupled to the LED via a PWM switch, and in response to the current of the inductor reaching the target current before the end of the on-time of a subsequent PWM switch cycle, interrupting energizing of the inductor at the end of the on-time of the PWM switch cycle.