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. 10, 2017
Filed:
Jun. 03, 2016
Nlt Technologies, Ltd., Kawasaki, Kanagawa, JP;
Setsuko Mio, Kawasaki, JP;
NLT TECHNOLOGIES, LTD., Kanagawa, JP;
Abstract
An example LED backlight driving circuit includes: an LED circuit including a plurality of LED columns that are connected in parallel, each of LED column including one or more LEDs that are connected in series; an LED control circuit connected to constant current circuits corresponding to a parallel number of the LED columns, the LED control circuit including a circuit that controls ON/OFF of a driving current of the LED and a dimming determination circuit that outputs a control signal capable of arbitrarily setting the driving current according to a dimming signal. The LED control circuit performs control based on first driving in which dimming is performed by varying a current value of the driving current of the LED and second driving in which the ON/OFF of the driving current is controlled in addition to the varying of the current value.