Laser lighting device
OwnerRifat Ata Mustafa Hikmet, Ties Van Bommelinventors
Life of this patent
Estimating the term…
Abstract
A laser light source comprises a laser source and a ceramic phosphor tile having a light entry face for receiving laser light from the laser source for laser pumping by the laser light. A reflective coating is formed over a face opposite the light entry face. A metal layer is provided between a heat sink and the ceramic phosphor tile, wherein the metal layer has a melting point below 120° C. The metal layer thus becomes a liquid during operating temperatures, and this reduced strain on the phosphor layer while maintaining thermal contact.
Claims15
A laser lighting device configured, in operation, to emit phosphor-converted light, the laser lighting device comprising:
- a laser light source configured to, in operation, emit laser light;
- a ceramic phosphor tile configured to receive laser light emitted by the laser light source, wherein the ceramic phosphor tile is configured for at least partly converting the laser light into the phosphor-converted light, the ceramic phosphor tile having a bottom face, a top face, and at least one side face arranged between the bottom face and the top face;
- a reflective layer is configured over at least part of one or more of:
- the top face;
- the bottom face;
- and the at least one side face;
- a heat sink;
- a metal layer arranged between the heat sink and the reflective layer, wherein the metal layer has a melting point below 120° C.;
- a protective layer arranged between the reflective layer and the metal layer to protect the reflective layer from the metal layer;
- and
- wherein the laser lighting device is configured to have metal of the metal layer in liquid form during operation of the laser light source.
Dependencies are inferred from the claim text.