Patent ID: 9709252
Date: 2017-07-18
CPC Classifications: F21V,G02F

Claim:
1. A backlight unit for use in an image display device, the backlight unit comprising: a first structural unit including a first side portion and a second side portion, the first side portion having a first truss structure; and a light source disposed between the first side portion and the second side portion and configured to emit light, wherein the first truss structure includes a first outer member, a second outer member, a first reinforcing member, a second reinforcing member, and a third reinforcing member, wherein the first reinforcing member and the second reinforcing member are disposed between the first outer member and the second outer member, wherein a main surface of the first reinforcing member extends in a first direction, wherein a main surface of the second reinforcing member extends in a second direction that is different from the first direction, wherein each of the first reinforcing member and the second reinforcing member meets both the first outer member and the second outer member at an acute angle or an obtuse angle, and wherein the third reinforcing member is connected between the first outer member and the second outer member and is disposed perpendicular to both the first outer member and the second outer member.