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:
Jun. 25, 2013
Filed:
Apr. 20, 2011
Chung-shu Lee, New Taipei, TW;
Jung-chang LU, New Taipei, TW;
Fa-ping Wang, New Taipei, TW;
Kun-yu Hsieh, New Taipei, TW;
Chung-Shu Lee, New Taipei, TW;
Jung-Chang Lu, New Taipei, TW;
Fa-Ping Wang, New Taipei, TW;
Kun-Yu Hsieh, New Taipei, TW;
Chicony Power Technology Co., Ltd., New Taipei, TW;
Abstract
A multi-channel LED driving system includes a power adapter, a rectifying and filtering unit, a plurality of LED strings, and a plurality of linear regulators, a CC/CV controller, an optically coupled isolator and a PWM controller. The CC/CV controller detects the conducting currents flowing though the LED strings and DC voltage source outputting from the rectifying and filtering unit, and provides voltage compensation of the power adaptor. In addition, the linear regulators slightly modulate the current difference between the LED strings to achieve current-sharing control, thus stabilize the illuminating brightness generating by the LED.