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:
Oct. 08, 2013
Filed:
Nov. 25, 2008
Jae-won Han, Deokeun-ri, KR;
Jun-hyeok Yang, Goyang Si, KR;
Jae-Won Han, Deokeun-ri, KR;
Jun-Hyeok Yang, Goyang Si, KR;
LG Display Co. Ltd., Seoul, KR;
Abstract
Disclosed is checking a drive state of a backlight lamp of a liquid crystal display device and notifying to an external entity whether it is normally driven in which level or is difficult to be normally driven. The apparatus for displaying a drive state of a backlight in a liquid crystal display device includes an inverter for converting an inputted DC voltage into an AC voltage of a certain level, and outputting the same to a backlight lamp; a drive voltage detecting unit for detecting a drive voltage supplied to the backlight lamp from the inverter and outputting a detected signal according to the detected drive voltage; a drive current detecting unit for detecting a tube current of the backlight lamp and outputting a detected signal according to the detected tube current; a drive voltage control/drive state signal output unit for checking a drive state of the backlight lamp based on the two detected signals, and controlling the drive voltage outputted from the inverter based on the checked result as well as outputting a drive state signal for indicating the drive state; and a lamp drive state indicating unit for indicating in which drive state the backlight lamp is driven according to the drive state signal.