Light-emitting diode array with projections
First Claim
1. A light-emitting diode array comprised of a multiplicity of light-emitting diodes arranged on a single substrate, each light-emitting diode having a light-emitting layer which emits light when subjected to carrier injection, and a light-emitting surface for external output of light from the light-emitting layer, wherein the light-emitting surface of each of the light-emitting diodes is provided with a multiplicity of projections, each of said projections having two sides which are at the same angle to the light-emitting surface and having a pitch so as to reduce the amount of light reflected by the light emitting surface and thereby increase the output of emitted light.
1 Assignment
0 Petitions
Accused Products
Abstract
A light-emitting diode array in which the light-emitting surface for external output of light from the light-emitting layer is processed to give it a slope, for example, which by increasing the critical angle of the internal reflection between the active layer and the air raises the external light output efficiency.
117 Citations
12 Claims
- 1. A light-emitting diode array comprised of a multiplicity of light-emitting diodes arranged on a single substrate, each light-emitting diode having a light-emitting layer which emits light when subjected to carrier injection, and a light-emitting surface for external output of light from the light-emitting layer, wherein the light-emitting surface of each of the light-emitting diodes is provided with a multiplicity of projections, each of said projections having two sides which are at the same angle to the light-emitting surface and having a pitch so as to reduce the amount of light reflected by the light emitting surface and thereby increase the output of emitted light.
- 8. A light-emitting diode array comprised of a multiplicity of light-emitting diodes arranged on a single substrate, each light-emitting diode have a light-emitting layer which emits light when subjected to carrier injection, and a light-emitting surface for external output of light from the light-emitting layer wherein the light-emitting surface of each of the light-emitting diodes is provided with a multiplicity of projections extending in concentric circles on the light-emitting surface, the projections being selected to reduce the amount of light reflected by the light emitting surface and thereby increase the output of emitted light.
Specification