Back to results
US 10,539,862 B2Granted
Wavelength conversion element, wavelength converter, light source apparatus, and projector
AssigneeSeiko Epson Corporation
InventorToshiaki Hashizume
Life of this patent
Estimating the term…
Abstract
A wavelength conversion element includes a wavelength conversion layer containing a plurality of phosphor particles and an inorganic binder that bonds the phosphor particles to each other and a substrate that holds the wavelength conversion layer and contains alumina and air cavities. The substrate has an apparent air cavity ratio that is greater than or equal to 10% and smaller than or equal to 30%. The substrate has a median diameter of particles of the alumina that is greater than or equal to 0.1 μm and smaller than or equal to 1.0 μm.
Claims12
A wavelength conversion element comprising:
- a wavelength conversion layer containing a plurality of phosphor particles and an inorganic binder that bonds the phosphor particles to each other;
- and
- a substrate that holds the wavelength conversion layer and contains alumina and air cavities,
- wherein the substrate has an apparent air cavity ratio that is greater than or equal to 10% and smaller than or equal to 30% and,
- wherein the substrate has a median diameter of particles of the alumina that is greater than or equal to 0.1 μm and smaller than or equal to 1.0 μm.
2 more elements
Dependencies are inferred from the claim text.