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:
Jul. 01, 2014
Filed:
Mar. 04, 2013
Unity Opto Technology Co., Ltd., New Taipei, TW;
Chih-Hsien Wu, New Taipei, TW;
Wei Chang, New Taipei, TW;
Huan-Ying Lu, New Taipei, TW;
Kai-Cheng Chuang, New Taipei, TW;
Shao-Wei Chiu, New Taipei, TW;
Unity Opto Technology Co., Ltd., New Taipei, TW;
Abstract
An adaptive LED dimming driving circuit is disclosed, wherein its control module is disposed with a first resistor, a second resistor, a retainer, a third resistor and a fourth resistor. When the control module receives an input voltage, the retainer is driven to output a retaining current Ito the second resistor, thereby ensuring normal dimming. The first resistor and the third resistor detect the input voltage so that when an input current Isatisfies a correlation I=I+I, the retaining current has the minimum value to increase work efficiency during the LED that is dimmed to the maximum intensity. When the input voltage is too low, the reference level is reduced to prevent the LED from generating twinkling. The fourth resistor detects the voltage energy of the LED. Therefore, when the voltage energy is changed, a high-low-voltage compensation is performed to achieve a constant power state.