Illumination unit having at least one LED as light source
AssigneePatent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
InventorsAndries Ellens, Günter Huber
Life of this patent
Estimating the term…
Abstract
An illumination unit having at least one LED as light source, the LED emitting primary radiation in the range from 300 to 430 nm, this radiation being completely converted into longer-wave radiation by phosphors which are exposed to the primary radiation of the LED, in which unit the conversion takes place at least with the aid of a phosphor which emits green with a peak emission wavelength at 495 to 540 nm and which originates from the class of the Ce-activated sialons, the sialon corresponding to the formula Mp/2Si12−p−qAlp+qOqN16−q:Ce3+, where M=Ca individually or in combination with Sr, with q=0 to 2.5 and p=0.5 to 3.
Claims13
An illumination unit having at least one LED as light source, the LED emitting primary radiation in the range from 300 to 430 nm, in particular 380 to 420 nm, this radiation being completely converted into longer-wave radiation by phosphors which are exposed to the primary radiation of the LED, wherein the conversion takes place at least with the aid of a phosphor which emits green with a peak emission wavelength at 495 to 540 nm and which originates from the class of the Ce-activation sialons, the sialon corresponding to the formula Mp/2Si12−p−qAlp+qOqN16−q:Ce3+, where M=Ca individually or in combination with Sr, with q=0 to 2.5 and p=1.5 to 3.
A phosphor from the class of the Ce-doped sialons, wherein the Ce-doped sialon corresponds to the formula Mp/2Si12−p−qAlp+qOqN16−q:Ce3+, where M=Ca individually or in combination with Sr, where q=0 to 0.8 and p=1.5 to 3.
Dependencies are inferred from the claim text.