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. 01, 2016
Filed:
Jul. 07, 2014
Unity Opto Technology Co., Ltd., New Taipei, TW;
Chih-Hsien Wu, New Taipei, TW;
Wei Chang, New Taipei, TW;
Kai-Cheng Chuang, New Taipei, TW;
Szu-Chien Chen, New Taipei, TW;
Unity Opto Technology Co., Ltd., New Taipei, TW;
Abstract
Disclosed is a purely resistive dimming circuit for driving LEDs to emit light and support an LED dimming function. The LEDs are divided into a first string and a second string connected in series with each other. The purely resistive dimming circuit is respectively and electrically coupled to an anode terminal of the first string and an anode terminal of the second string by a driving resistor and a current limiting resistor which are connected in series with each other. The resistance of the driving resistor restricts the LEDs to emit light at different stages to enhance the working efficiency of circuits, while using the property of the current limiting resistor to limit the overvoltage current, so as to achieve a constant power operating effect.