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. 07, 2014
Filed:
Feb. 14, 2012
Mykhaylo Raykhman, Munich, DE;
Manfred Schlenk, Augsburg, DE;
Hans Hoffmann, Augsburg, DE;
Minebea Co., Ltd., Nagano-ken, JP;
Abstract
A control circuit () for light emitting diode arrangements (), used particularly for backlighting LC flat screens. The circuit has a plurality of control channels (') in each of which one or more light emitting diode arrangements () are disposed. The circuit has a balancing device () which allows currents in the individual control channels (′) to be balanced. Each control channel (′) has a separate dimming device () through which a brightness of the light emitting diode arrangements () in this control channel (′) can be changed separately from the other control channels (′). For this purpose, the control circuit has a compensation device () which allows a flow of current in the individual control channels (′) to be balanced when the light emitting diodes have different brightnesses.