Patent ID: 8227966

Claim:
A light emitting device, comprising a light emitting body and a protection layer provided on a light emitting surface of the light emitting body, wherein one of surfaces of the protection layer opposite to the light emitting surface includes a plurality of minute regions δ, a largest inscribed circle of the minute regions δ having a diameter from 0.2 μm to 2 μm, each of the plurality of minute regions δ is adjoined by and surrounded by some other ones of the plurality of minute regions δ, the plurality of minute regions δ include a plurality of minute regions δ 1 which are randomly selected from the plurality of minute regions δ so as to constitute 20% to 80% of the minute regions δ and a plurality of minute regions δ 2 which constitute the remaining portion of the minute regions δ, light transmitted through the plurality of minute regions δ 1 and light transmitted through the plurality of minute regions δ 2 have a phase difference of π, and the surface of the protection layer opposite to the light emitting surface borders on a medium which has a lower refractive index than a refractive index of the protection layer.