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:
Sep. 20, 2011
Filed:
May. 08, 2009
Yu Jin Jang, Gyunggi-do, KR;
Byoung Own Min, Gyunggi-do, KR;
Jung Chul Gong, Seoul, KR;
Sang Cheol Shin, Gyunggi-do, KR;
Jeong IN Cheon, Seoul, KR;
Yu Jin Jang, Gyunggi-do, KR;
Byoung Own Min, Gyunggi-do, KR;
Jung Chul Gong, Seoul, KR;
Sang Cheol Shin, Gyunggi-do, KR;
Jeong In Cheon, Seoul, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-do, KR;
Abstract
Disclosed is a liquid crystal display (LCD) backlight inverter. The LCD backlight inverter includes a lamp open detection unit outputting a first open detection voltage for a preset time period when it is determined that a predetermined lamp is open, based on a current voltage corresponding to the current of the predetermined lamp of a plurality of lamps, a first open determination unit outputting an open detection signal when the first open detection voltage is input, a second open determination unit outputting a protection signal when it is determined that all of the plurality of lamps are open based on detection voltages of the plurality of lamps, a temporary protection determination unit outputting a frequency change signal when both the open detection signal and the protection signal are input, and an operating frequency control unit changing an operating frequency to a preset protective frequency according to the frequency change.