US 8,796,708 B2 · LED structure to increase brightness

Abstract

A light emitting semiconductor device comprising an LED having an emission aperture located on a surface of the LED and the emission aperture has a size that is smaller than a surface area of the LED where the emission aperture is formed. The device further includes a reflector surrounding both side walls, a bottom surface, and portions of a surface of the LED where the emission aperture is formed or surrounding the bottom surface and portions of the surface of the LED where the emission aperture is formed so that an area on the surface uncovered by the reflector is the emission aperture and is smaller than the area of the LED. Alternatively, in the light emitting semiconductor, the surface of the LED substantially aligned with the emission aperture may be roughened and the surface of the LED beyond the emission aperture may be smooth. The surface of the LED beyond the emission aperture may also be covered by a low loss reflector.

Claims7

Dependent claims

A light emitting semiconductor device comprising:

a light emitting diode having two side walls, a bottom surface and a top surface, and having an emission aperture located on the top surface of the light emitting diode;
and
a reflector formed on the light emitting diode on a portion of the top surface of the light emitting diode surrounding and in direct contact with the two side walls and the bottom surface of the light emitting diode, wherein an area on the top surface of the light emitting diode not covered by the reflector constitutes the emission aperture,
wherein the emission aperture has a size that is smaller than a surface area of the to surface of the light emitting diode.

1 more element

Dependencies are inferred from the claim text.

LED structure to increase brightness

Life of this patent

LED structure to increase brightness

Life of this patent

Abstract

Claims7