US 2006/0124943 A1 · Large-sized light-emitting diodes with improved light extraction efficiency

Abstract

A light-emitting device with an array of window openings to enhance the light extraction efficiency from this device is provided. This array of window openings is employed to create a much larger sidewall area to enhance the light extraction from the sidewalls of these openings. With this array of window openings, photons trapped due to the total internal reflection can propagate within the device and be extracted from the sidewalls of these openings. A variation of designs can be applied to the array of window openings. Even the shape of these openings can be designed such that the area of the sidewalls is increased. Large-sized light-emitting diodes can improve the light extraction efficiency by employing the array of window openings.

Claims20

Dependent claims

A light-emitting diode, comprising:

a substrate;
an N-type semiconductor layer;
a P-type semiconductor layer;
a light emitting layer interposed between said N-type semiconductor layer and said P-type semiconductor layer;
at least one window opening with an emitting area of said light-emitting diode, the at least one window opening extending at least partially through the P-type semiconductor layer;
and
an N-electrode connected to said N-type semiconductor layer and a P-electrode connected to said P-type semiconductor layer.

4 more elements

Dependencies are inferred from the claim text.

Large-sized light-emitting diodes with improved light extraction efficiency

Life of this patent

Large-sized light-emitting diodes with improved light extraction efficiency

Life of this patent

Abstract

Claims20