Patent ID: 8194415
Filing Date: 2012-06-05
Classification: G02F,H01L

Abstract:
1. A backlight device comprising: a package light source having at least one LED element mounted at a center thereof; a heat radiation region provided immediately below the at least one LED element; one of an electrical connection wiring line and an electrical connection region provided on one of left side and right side of the at least one LED element and conducting to the at least one LED element so as to form an asymmetric conductive region; a printed circuit board having the package light source mounted thereon, the printed circuit board having a heat radiation structure so as to correspond to the heat radiation region provided immediately below the at least one LED element; and a wiring region for the printed circuit board provided so as to correspond to the one of the electrical connection wiring line and the electrical connection region formed so as to be asymmetric; wherein: the package light source comprises at least two corresponding package light sources provided so as to be opposed to each other at the one of the electrical connection wiring line and the electrical connection region formed so as to be asymmetric with respect to the at least one LED element; and by mounting the at least two corresponding package light sources on the printed circuit board, the at least two corresponding package light sources each have an electric circuit region and a heat radiation region for the printed circuit board separated from each other, the electric circuit region being connected by wiring on an inner side of the printed circuit board to control the driving thereof, the heat radiation region for the printed circuit board being in end regions on outer sides of the printed circuit board and having a structure for radiating heat from immediately below the at least one LED element.