Patent ID: 9557465
Date: 2017-01-31
CPC Classifications: F21S,F21V,F21Y,G02B

Claim:
1. An illumination device comprising: a light guide plate; and multiple light emitting elements annularly arranged on a back side of the light guide plate, wherein the light guide plate comprises: an element array-facing part which is a part facing an element array of the multiple light emitting elements and which has an incident surface to allow light emitted from the light emitting elements to enter; an outer annular outer part provided on an annular outside of the element array-facing part; an inner reflecting part which is located on an inner side of the element array-facing part and has a reflecting surface for reflecting the light entering from the incident surface toward the inner side of the element array-facing part, and which has a first light scattering region having a light scattering treatment applied thereto; and an annular inner part formed on an inner side of the inner reflecting part continuously with the inner reflecting part, the annular inner part, the inner guide part and the annular outer part comprise a solid light guide plate.