Encapsulant shapes for light emitting devices lacking rotational symmetry designed to enhance extraction of light with a particular linear polarization
View Patent ↗The light-emitting device includes a light source and a transparent encapsulating material that is shaped to modify the polarization anisotropy of light emitted by the light source in at least one direction.
1. A light-emitting device, comprising:
a light source; and
a transparent encapsulating material that is shaped to modify polarization anisotropy of light emitted by the light source in at least one direction.
2. The device in claim 1 , wherein the polarization anisotropy of light emitted in at least one direction is increased.
3. The device in claim 1 , wherein the polarization anisotropy of light emitted in at least one direction is decreased.
4. The device in claim 1 , wherein the cumulative effect of modified polarization anisotropy is such that for all emitted light, the total component of light polarization along a particular direction has greater magnitude than components orthogonal to this direction.
5. The device in claim 1 , wherein the cumulative effect of modified polarization anisotropy is such that for all emitted light, the total component of light polarization lying in a particular plane has greater magnitude than the components lying in orthogonal planes.
6. The device in claim 1 , wherein the light source is a semiconductor light-emitting diode chip.
7. The device in claim 1 , wherein the light source is one of a plurality of light sources arranged within the encapsulating material.
8. The device of claim 1 , further comprising a phosphor above the light source.
9. The device of claim 1 , wherein the encapsulating material is a polymer.