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. 23, 2013
Filed:
Aug. 09, 2011
Jong Tae Hwang, Seoul, KR;
Seong Joon Park, Seoul, KR;
Dae Ho Kim, Seoul, KR;
Moon Sang Jung, Seoul, KR;
Jong Tae Hwang, Seoul, KR;
Seong Joon Park, Seoul, KR;
Dae Ho Kim, Seoul, KR;
Moon Sang Jung, Seoul, KR;
Dongbu HiTek Co., Ltd., Seoul, KR;
Abstract
A driver circuit is configured to drive light-emitting elements. The driver circuit includes a light-emitting element, a power switching element, a control circuit, and a charge pump circuit. The power switching element includes a first terminal connected to the light-emitting element and turns on and off the light-emitting element. The control circuit is connected to a second terminal of the power switching element and controls a switching operation of the power switching element. The charge pump circuit is connected between the control circuit and a power source for the light-emitting element and supplies current to the control circuit for driving the control circuit.