Multi-layer type light emitting device

摘要

Disclosed is a multi-layer type light emitting device (100) including: at least two light emitting sources (110,120) disposed to be multi-layered; and an optical surface (114) disposed so as to correspond to each of the light emitting sources excluding one positioned at the rearmost stage for forwardly reflecting rays of light emitted by the light emitting source (110) and transmitting rays of light emitted by the light emitting source disposed at the rear stage (120). With this device, rays of light emitted by each of the light emitting sources excluding one positioned at the rearmost stage are reflected from the corresponding optical surface (114) and radiated forwardly. In this case, when a different optical surface is disposed on the front stage, the rays of light transmit the optical surface and are radiated to the exterior. In the case where rays of light emitted by the light emitting source positioned on the rearmost stage (120) are radiated forwardly, they transmit the optical surface positioned at the front stage (114) and are radiated to the exterior. Accordingly, rays of light emitted by the multi-layered light emitting sources are radiated from the same plane to the exterior.