Patent ID: 9719012
Date: 2017-08-01
CPC Classifications: C09K,F21K,F21Y,H05B

Claim:
1. A tubular lamp for producing visible light, comprising: a solid state source for producing electromagnetic energy, the solid state source comprising a semiconductor chip and an enclosure about the semiconductor chip; a tubular container positioned outside the enclosure, the tubular container formed of optically transmissive material having an interior volume, the tubular container having a first end section with an external surface coupled to receive electromagnetic energy from the solid state source, a second end section opposite the first end section, and an elongated tubular longitudinal section between the first and second end sections, wherein the elongated tubular longitudinal section is configured to act as a light guide with respect to the electromagnetic energy received from the solid state source; a reflector at the second end section of the tubular container, configured to longitudinally reflect electromagnetic energy from the solid state source back through the light guide of the elongated tubular longitudinal section; a reflector at the first end section of the tubular container, configured to longitudinally reflect at least some electromagnetic energy back through the light guide of the elongated tubular longitudinal section; a bearer material at least substantially filling an interior volume of the tubular container; and a plurality of doped semiconductor nanophosphors dispersed in the bearer material in the container, the tubular container and bearer material being configured to provide deployment of the doped semiconductor nanophosphors outside the enclosure of the solid state source and remotely from the semiconductor chip of the solid state source, each doped semiconductor nanophosphor being of a type excited in response to the electromagnetic energy received from the solid state source for re-emitting visible light, wherein the longitudinal section of the tubular container is also configured to allow lateral emission of light produced by excitation of the doped semiconductor nanophosphors when excited by the electromagnetic energy received from the solid state source, and wherein: (a) the visible light output produced by excitation of the doped semiconductor nanophosphors is at least substantially white; (b) the visible light output produced by excitation of the doped semiconductor nanophosphors has a color rendering index (CRI) of 75 or higher; and (c) the visible light output produced by excitation of the doped semiconductor nanophosphors has a color temperature in one of the following ranges: