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:
Jun. 29, 2010
Filed:
Apr. 02, 2007
Sang Cheol Shin, Gyunggi-do, KR;
Byoung Own Min, Gyunggi-do, KR;
Chang Woo Ha, Gyunggi-do, KR;
Jung Chul Gong, Seoul, KR;
Sang Cheol Shin, Gyunggi-do, KR;
Byoung Own Min, Gyunggi-do, KR;
Chang Woo Ha, Gyunggi-do, KR;
Jung Chul Gong, Seoul, KR;
Samsung Electro-Mechanics Co., Ltd, Suwon, Gyunggi-Do, KR;
Abstract
An LCD backlight inverter includes a soft starter for generating a soft-start reference voltage gradually increasing as the driving power begins to be supplied. The LCD backlight inverter also includes a first error detector for receiving a first feedback voltage indicating the magnitude of driving current of the lamp and for comparing a smaller value out of a predetermined first reference voltage and the soft-start reference voltage with the first feedback voltage to generate a first error signal corresponding to the difference between the smaller value and the soft-start reference voltage. The LCD backlight inverter further includes a pulse width modulation comparator for comparing the first error signal and a triangle wave oscillation signal to output the pulse width modulation control signal with a predetermined duty ratio. The LCD backlight inverter prevents application of over-current and over-voltage to the LCD backlight to prolong the lifetime of the backlight.