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:
May. 27, 2014
Filed:
Jul. 15, 2009
Yun-gun Lee, Cheonan-si, KR;
Ki-bok Jang, Masan-si, KR;
Moon-shik Kang, Yongin-si, KR;
Sung-kyu Park, Masan-si, KR;
Hyun-ho Seo, Masan-si, KR;
Yun-Gun Lee, Cheonan-si, KR;
Ki-Bok Jang, Masan-si, KR;
Moon-Shik Kang, Yongin-si, KR;
Sung-Kyu Park, Masan-si, KR;
Hyun-Ho Seo, Masan-si, KR;
Samsung Display Co., Ltd., , KR;
Korea Taiyo Yuden Co., Ltd., , KR;
Abstract
A backlight unit includes; a light source, an inverter which provides the light source with an input voltage, and a printed circuit board ('PCB') connected to the light source, wherein the PCB includes a protection circuit which detects an open-lamp-protection voltage which varies according to a change of the input voltage and changes a reference voltage according to the change of the input voltage, wherein the protection circuit turns off the inverter when the detected open-lamp-protection voltage is higher than the changed reference voltage.