Pixel of microdisplay having integrated catadioptric light extraction system
AssigneeSundiode Korea
InventorsJames Chinmo KIM, Sungsoo YI
Life of this patent
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Abstract
Disclosed is a unit pixel of a microdisplay having a concave reflector with a center aperture. The light extractor has a protrusion and a bulk portion formed using the same epitaxial growth process. The concave reflector with a center aperture is formed on the protrusion, and epitaxial growth of the light-emitting body is made through the aperture concave reflector. In addition, the light rays reflected by the concave reflector with a center aperture has exit angles that are nearly perpendicular to the exit surface and are thus easily emitted to the outside.
Claims17
A pixel of a microdisplay comprising:
- a light extractor having a compound semiconductor and having a hemispherical protrusion and a bulk portion having the same material as the protrusion;
- a reflector with a center aperture formed on a surface of the protrusion;
- and
- a light emitting body formed on the reflector with a center aperture and a single crystal grown from the light extractor to form light of a specific wavelength.
A pixel of a microdisplay comprising:
- a light extractor having a hemispherical protrusion made of a GaN material and a bulk portion having the same material as the protrusion;
- a reflector with a center aperture formed on a surface of the protrusion;
- and
- a light-emitting body for forming light of a first wavelength and light of a second wavelength longer than the first wavelength.
Dependencies are inferred from the claim text.