Light emitting device including a plurality of first and second protrusions

A light emitting device comprising:

• a light guide plate including a plurality of first protrusions on a first main surface and a plurality of second protrusions on a second main surface opposite to the first main surface;
• a plurality of light source elements disposed adjacent to the light guide plate;
• a prism sheet having a third main surface opposed to the first main surface and a fourth main surface opposite to the third main surface;
• and
• a lenticular lens including a fifth main surface opposed to a fourth main surface of the prism sheet and a sixth main surface opposite to the fifth main surface, wherein
• the first protrusions of the light guide plate are arranged along a first direction and extend along a second direction intersecting the first direction,
• the light source elements emit light to the second direction,
• the second protrusions of the light guide plate extend along the first direction and are arranged along the second direction,
• the prism sheet includes a plurality of third protrusions extending along the first direction and arranged in the second direction,
• the lenticular lens includes a plurality of fourth protrusions arranged along the first direction and extending along the second direction,
• a light emitting surface of each of the light source elements is disposed in the second direction, and
• a cross-sectional shape of each of the fourth protrusions includes an arc having a curvature of 35.21±15%.