Illumination assembly including wavelength converting material
First Claim
1. An illumination assembly comprising:
- a plurality of spaced apart solid state light-emitting devices, each having a light-emitting surface that outputs a primary light having a primary wavelength spectrum; and
a light guide comprising a light homogenization region and a light extraction region, light from the light-emitting devices propagating within the light guide and the light homogenization region and the light extraction region extending from a top surface of the light guide to a bottom surface of the light guide;
wherein;
the light homogenization region is configured to receive the primary light emitted by the solid state light-emitting devices and includes a wavelength converting material that converts the primary light to a secondary light having a secondary wavelength spectrum different from the primary wavelength spectrum, the wavelength converting material having different densities for at least two locations in the light homogenization region including a first density at a location disposed directly in front of the light-emitting surface of one of the light-emitting devices and a second density being different from the first density at a location in-between the light-emitting surfaces of the one and an adjacent one of the light-emitting devices;
the light extraction region has a length along which the secondary light propagates and an emission surface through which the secondary light is emitted; and
the light guide is generally rectangular in a plane parallel to the emission surface and the light guide further comprises a light input edge at each corner and the light-emitting devices each are located at a respective one of the light input edges to input light into the light homogenization region of the light guide at the corners.
5 Assignments
0 Petitions
Accused Products
Abstract
Illumination assemblies, components, and related methods are described. An illumination assembly can include at least one solid state light-emitting device, and at least one light guide including a light homogenization region configured to receive light emitted by the solid state light-emitting device and including a light output boundary. The light homogenization region substantially uniformly distributes light outputted over the light output boundary. A wavelength converting material can be disposed within at least a portion of the light homogenization region. In some assemblies, a light extraction region can be configured to receive light from the light output boundary of the light homogenization region, and can have a length along which received light propagates and an emission surface through which light is emitted. The light extraction region can include a wavelength converting material disposed within at least a portion of the light extraction region.
-
Citations
16 Claims
-
1. An illumination assembly comprising:
-
a plurality of spaced apart solid state light-emitting devices, each having a light-emitting surface that outputs a primary light having a primary wavelength spectrum; and a light guide comprising a light homogenization region and a light extraction region, light from the light-emitting devices propagating within the light guide and the light homogenization region and the light extraction region extending from a top surface of the light guide to a bottom surface of the light guide;
wherein;the light homogenization region is configured to receive the primary light emitted by the solid state light-emitting devices and includes a wavelength converting material that converts the primary light to a secondary light having a secondary wavelength spectrum different from the primary wavelength spectrum, the wavelength converting material having different densities for at least two locations in the light homogenization region including a first density at a location disposed directly in front of the light-emitting surface of one of the light-emitting devices and a second density being different from the first density at a location in-between the light-emitting surfaces of the one and an adjacent one of the light-emitting devices; the light extraction region has a length along which the secondary light propagates and an emission surface through which the secondary light is emitted; and the light guide is generally rectangular in a plane parallel to the emission surface and the light guide further comprises a light input edge at each corner and the light-emitting devices each are located at a respective one of the light input edges to input light into the light homogenization region of the light guide at the corners. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification