LED packages with scattering particle regions
First Claim
Patent Images
1. A light emitting diode (LED) package, comprising:
- at least one LED that emits LED light in an LED emission profile;
a first plurality of scattering particles to scatter a first target wavelength and a second plurality of scattering particles to scatter a second target wavelength different from said first target wavelength, said first and second scattering particles arranged around said LED to scatter said LED light to improve the uniformity of said LED emission profile; and
wherein said first and second scattering particles are arranged in regions around said LED based on emission angles.
3 Assignments
0 Petitions
Accused Products
Abstract
An LED package comprises at least one LED that emits LED light in an LED emission profile. The LED package includes regions of scattering particles with the different regions scattering light primarily at a target wavelength or primarily within a target wavelength range. The location of the regions and scattering properties are based at least partially on the LED emission profile. The regions scatter their target wavelength of LED light to improve the uniformity of the LED emission profile so that the LED package emits a more uniform profile compared to the LED emission profile. By targeting particular wavelengths for scattering, the emission efficiency losses are reduced.
197 Citations
34 Claims
-
1. A light emitting diode (LED) package, comprising:
-
at least one LED that emits LED light in an LED emission profile; a first plurality of scattering particles to scatter a first target wavelength and a second plurality of scattering particles to scatter a second target wavelength different from said first target wavelength, said first and second scattering particles arranged around said LED to scatter said LED light to improve the uniformity of said LED emission profile; and wherein said first and second scattering particles are arranged in regions around said LED based on emission angles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. An emitter package, comprising:
-
at least one emitter that emits light in an emitter emission profile; a first region of first scattering particles and a second region of second scattering particles, said first and second regions of scattering particles arranged around said at least one emitter to improve the emission uniformity of said emitter package compared to said emitter emission profile; and wherein said first and second regions of scattering particles are arranged in regions around said emitter based on emission angles. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A light emitting diode (LED) package, comprising:
-
at least one LED that emits light in an LED emission profile; and a first plurality of scattering particles having a first particle size distribution to scatter a first target wavelength range, and a second plurality of scattering particles having a second size distribution to scatter a second target wavelength range, each of said first and second scattering particles arranged in respective regions around said LED based on emission angles. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A light emitting diode (LED) package, comprising:
-
at least one LED that emits light in an LED emission profile; first and second scattering features, wherein said first scattering feature scatters a first target wavelength of light and said second scattering feature scatters a second target wavelength, each of said first and second scattering features arranged around said LED to scatter light from said LED based on said LED emission profile such that said LED package emits a package emission profile having improved uniformity compared to said LED emission profile; and wherein said first and second scattering features are arranged in regions around said LED based on emission angles.
-
Specification