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:
Feb. 19, 2008
Filed:
Aug. 16, 2004
Nien-hui Kung, Miao-Li Hsien, TW;
Yiu-i Lin, Shu-Lin, TW;
Der-jiunn Wang, Hsin-Chu, TW;
Chao-hsuan Chuang, Chu-Pei, TW;
Jien-sheng Chen, Miao-Li Hsien, TW;
Shui-mu Lin, Taichung Hsien, TW;
Wei-hsin Wei, Taichung Hsien, TW;
Nien-Hui Kung, Miao-Li Hsien, TW;
Yiu-I Lin, Shu-Lin, TW;
Der-Jiunn Wang, Hsin-Chu, TW;
Chao-Hsuan Chuang, Chu-Pei, TW;
Jien-Sheng Chen, Miao-Li Hsien, TW;
Shui-Mu Lin, Taichung Hsien, TW;
Wei-Hsin Wei, Taichung Hsien, TW;
Richtek Technology Corp., Hsin-Chu Hsien, TW;
Abstract
A control device, which controls a power-converting module that is coupled to a light-emitting component, includes a duration detecting unit and a control signal generator. The duration detecting unit compares the duration of a predetermined logic state of a pulsating input dim control signal with a reference time period. The control signal generator is enabled by the duration detecting unit so as to generate a control signal that enables the power-converting module to generate a drive voltage for driving the light-emitting component when the duration of the predetermined logic state is not longer than the reference time period. The duration detecting unit disables the control signal generator to disable the power-converting module when the duration of the predetermined logic state is longer than the reference time period.