CPC G02F 1/133603 (2013.01) [G02F 1/133526 (2013.01); G02F 1/133607 (2021.01)] | 6 Claims |
1. A light emitting device comprising:
a light guide plate having a first main surface, a second main surface, a first side surface, a second side surface opposite to the first side surface, a third side surface adjacent to the first side surface and the second side surface and a fourth side surface opposite to the third side surface; and
a light source element disposed on the first side surface of the light guide plate, wherein
the light guide plate has a first protrusion part on the first main surface and a second protrusion part on the second main surface,
a plurality of the first protrusion parts are arranged along a first direction and extended along a second direction which crosses the first direction,
the first protrusion part has a first ridge extending from the first side surface to the second side surface,
a plurality of the second protrusion parts are arranged along the second direction and extended along the first direction,
the second protrusion part has a second ridge extending from the third side surface to the fourth side surface,
a cross-sectional shape of each of the first protrusion parts has an apex angle between 55 and 65 degrees, inclusive,
a cross-sectional shape of each of the second protrusion parts has a base angle between 1 and 3 degrees, inclusive,
an emission surface of the light source element is disposed in the second direction, and
a reflection sheet disposes to be opposed to the second main surface of the light guide plate.
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