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:
Jan. 08, 2013
Filed:
Oct. 27, 2009
Jong Ho Lim, Daegu, KR;
Kyu Bong Jung, Chuncheon-si, KR;
Young Kyu Park, Paju-si, KR;
Bong Koo Kang, Pohang-si, KR;
Jong Ho Lim, Daegu, KR;
Kyu Bong Jung, Chuncheon-si, KR;
Young Kyu Park, Paju-si, KR;
Bong Koo Kang, Pohang-si, KR;
LG Display Co., Ltd., Seoul, KR;
Postech Academy-Industry Foundation, Pohang-Si, KR;
Abstract
A backlight unit, with a parallel configuration of plural lamps, having improved reliability is disclosed. The backlight unit driver includes: first and second lamps connected parallel to each other; a DC/AC inversion portion inverting a DC voltage into an AC voltage to apply the AC voltage to the lamps; a transformer transforming the AC voltage from the DC/AC inversion portion; a positive polarity AC signal compensator compensating an electric current difference between the first and second lamps using positive polarity AC signals from the first and second lamps; and a negative polarity AC signal compensator compensating the electric current difference between the first and second lamps using negative polarity AC signals from the first and second lamps.