Patent ID: 8304788
Filing Date: 2012-11-06
Classification: H01L

Abstract:
1. A light-emitting apparatus comprising: a substrate; a plurality of light-emitting devices formed on the substrate and each comprising a first electrode formed on the substrate; an emission layer formed on the first electrode; and a second electrode formed on the emission layer; a cavity structure for resonating light emitted from the emission layer between a first reflective surface and a second reflective surface, the first reflective surface being located on the first electrode side relative to the emission layer, the second reflective surface being located on the second electrode side relative to the emission layer; and a periodic structure formed in the first reflective surface, or in the second reflective surface, or between the first reflective surface and the second reflective surface, wherein a height h of the periodic structure in a direction perpendicular to the substrate satisfies: where λ is a peak wavelength of a spectrum of light extracted to outside, and n is an average refractive index between the first reflective surface and the second reflective surface.