Patent ID: 9562671
Date: 2017-02-07
CPC Classifications: F21V,F21Y,H01J,H01L

Claim:
1. A lighting device, comprising: a housing enclosing a housing interior and comprising a light exit for outputting a combination of primary light and secondary light; a light source configured for emitting a primary light beam of a primary wavelength through the housing interior; a light converter comprising a luminescent material facing the housing interior and configured for emitting secondary light of one or more wavelengths different from the primary wavelength, in response to excitation by the primary light beam; a color tuning device configured for adjusting a position of the primary light beam relative to the luminescent material; and an optical element disposed in the housing interior and interposed in at least a portion of the primary light beam between the light source and the luminescent material, wherein the color tuning device is configured for moving the optical element, and the optical element is selected from the group consisting of: an optical waveguide comprising an input surface configured to receive the portion of the primary light beam at an incident direction and an output surface configured to output the portion of the primary light beam transmitted through the optical waveguide at an angle relative to the incident direction; and an optical waveguide comprising an input end optically coupled to the light source and an output end facing the housing interior at an angle to the luminescent material, and the optical waveguide is configured for directing the primary light beam from the light source, through the housing interior and toward the luminescent material.