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:
Oct. 14, 2014
Filed:
Dec. 23, 2011
Ching-tsan Lee, Hsin-Chu, TW;
Pai-feng Liu, Hsin-Chu, TW;
Ching-Tsan Lee, Hsin-Chu, TW;
Pai-Feng Liu, Hsin-Chu, TW;
Leadtrend Technology Corp., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
An integrated circuit is capable of controlling current through several light-emitting diode (LED) chains, each having several LEDs forward-connected in series between a major anode and a major cathode. Each major anode is coupled to a power node. The integrated circuit has several driving circuits, a detection node, a comparator, and a logic controller. The driving circuits can light the LED chains, respectively. Detection voltage at the detection node corresponds to voltage at one of the major cathodes. The comparator asserts a ready signal when the detection voltage exceeds a reference voltage. Receiving a dimming signal and the ready signal, if the dimming signal is asserted and the ready signal has been asserted, the logic controller enables the driving circuits to light the LED chains.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile