| 摘要 |
A light guide plate has a light exit plane and a light entrance plane arranged on the periphery of the light exit plane. Light incident on the light entrance plane is outputted from the light exit plane. The light entrance plane includes a plurality of first end surfaces and a plurality of second end surfaces protruding in an external direction beyond the first end surfaces in plan view. The first end surfaces and the second end surfaces are alternately arranged along the periphery of the light exit plane.
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