Light emitting device
AssigneeSignify Holding B.V.
InventorsTIES VAN BOMMEL, RIFAT ATA MUSTAFA HIKMET
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Abstract
The invention relates to a lighting device comprising an envelope, a base, a solid-state light source, an exhaust tube, and a light guide provided with a light-outcoupling means. The light guide is optically coupled to said solid-state light source and partially arranged inside the exhaust tube. The high performance of the laser light source, as a solid-state light source, with the interaction of the optical fiber, as a light guide with the exhaust tube comprised in the stem, will make this lighting device more performant and improve its functionality and/or performance.
Claims15
A lighting device providing device light and comprising at least:
- a light-transmissive envelope;
- a stem at least partly arranged inside the envelope, at least part of the stem defining a first volume while a second volume is defined between the stem and the envelope;
- a light guide having a melting temperature higher than the melting temperature of the stem and the melting temperature of the light guide is higher than the melting temperature of the envelope, the light guide being partly arranged inside the first volume, partly arranged inside the second volume, and partly arranged outside the first volume and the second volume;
- a solid-state light source providing light source light and being arranged outside the first volume and second volume;
- wherein at least part of the light source light is coupled into the light guide at a first end of a light guide portion being arranged outside the first volume and the second volume, and is light-guided via total internal reflection through the light guide to a light guide portion that is arranged inside the second volume;
- wherein the light guide portion of the light guide which is arranged inside the second volume comprises one or more light outcoupling means configured to couple light-guided light out the light guide as outcoupled light into the second volume.
Dependencies are inferred from the claim text.