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:
Aug. 16, 2016
Filed:
Feb. 23, 2015
Earl W. Mccune, Jr., Santa Clara, CA (US);
Earl W. McCune, Jr., Santa Clara, CA (US);
Other;
Abstract
A solid-state lighting system includes a light-emitting device (LED) driver, an LED or plurality of LEDs, a transistor connected in series with the LED or plurality of LEDs, and a current source connected in parallel with the transistor. The LED driver generates a drive signal, which controls the transistor and current flowing through the LED or plurality of LEDs and the transistor. The drive signal is generated in response to a dim control signal, which determines the dim setting of the LED or plurality of LEDs. The current source serves to maintain at least a minimum current through the LED or plurality of LEDs at all times, even when the transistor is turned OFF or is in a high resistance state, thereby preventing large supply voltages from dropping across the transistor and protecting the transistor from undesirably breaking down or being damaged or destroyed.