Patent ID: 8866994
Filing Date: 2014-10-21
Classification: G02B,G02F

Abstract:
1. A backlight device comprising: a frame which includes a first opening having a first side, a second side, a third side, and a fourth side; a planar light source which is disposed in the first opening of the frame; a plurality of optical sheet groups which are disposed on the planar light source and include a first optical sheet group and a second optical sheet group; and an adhesive layer which has a second opening formed along the first side, second side, third side, and the fourth side of the frame; wherein the first optical sheet group is fixed to the frame via the adhesive layer at the second side, third side, and the fourth side of the frame; and wherein the second optical sheet group is fixed to the frame at the first side of the frame and is not fixed to the frame at the second side, the third side, and the fourth side of the frame.