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:
Apr. 29, 2014
Filed:
Mar. 15, 2012
Pei-yuan Chen, Longtan Township, Taoyuan County, TW;
Chia-wei Liao, Zhubei, TW;
Jing-meng Liu, Zhubei, TW;
Leng-nien Hsiu, Zhubei, TW;
Pei-Yuan Chen, Longtan Township, Taoyuan County, TW;
Chia-Wei Liao, Zhubei, TW;
Jing-Meng Liu, Zhubei, TW;
Leng-Nien Hsiu, Zhubei, TW;
Richtek Technology Corporation, Chupei, Hsin-Chu, TW;
Abstract
The present invention discloses a light emitting device power supply circuit, a light emitting device driver circuit and a control method thereof. The light emitting device driver circuit is coupled to a tri-electrode AC switch (TRIAC) dimmer circuit, and it controls the brightness of a light emitting device circuit according a rectified dimming signal. The light emitting device driver circuit includes a power stage circuit and a light emitting device control circuit. The light emitting device control circuit generates a switch control signal. The power stage circuit operates at least one power switch thereof according to the switch control signal to generate a latching current for firing the TRIAC dimmer circuit, and the latching current is inputted to the light emitting device circuit.