Patent ID: 8934071
Filing Date: 2015-01-13
Classification: G02B,G02F

Abstract:
1. A lighting device comprising: a light guide plate having a first surface as a light emitting surface, a plurality of side surfaces and a second surface opposed to the first surface of the light guide plate; a plurality of light emitting elements each of which faces one of the plurality of side surfaces of the light guide plate; a scattering reflection region in which a plurality of groove arrays including a plurality of first grooves linearly extends in a first direction, the plurality of groove arrays being arranged in a parallel manner in a second direction intersecting the first direction in in-plane directions, the scattering reflection region provided on the second surface; a peripheral region provided on the second surface between the scattering reflection region and edges of the plurality of side surfaces, the peripheral region being a non-light emitting region of the light guide plate; and a second groove disposed on one side of an extended line of one of the plurality of groove arrays positioned on one end side in the second direction among the plurality of groove arrays and disposed in the peripheral region apart from the scattering reflection region, wherein a first distance between the second groove and a third groove in the first direction is greater than a second distance between a fourth groove and a fifth groove, the third groove being closest to the second groove among the first grooves, the fourth groove being one of the first grooves, and the fifth groove being one of the first grooves that is positioned adjacent to the fourth groove in the first direction.