White phosphor converted led with stable flux output versus temperature

• Main Authors: HEIDEMANN, MATTHIAS, BECHTEL, HANS-HELMUT, STEIGELMANN, OLIVER JENS, WIECHERT, DETLEF UWE
• Format: Patent
• Language: Chinese; English
• Published: 11.05.2020
• Subjects: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL; ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; PERFORMING OPERATIONS; REFRACTORIES; SEMICONDUCTOR DEVICES; SLAG; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; TRANSPORTING; TREATMENT OF NATURAL STONE; VEHICLES IN GENERAL; WEAPONS

The invention provides a lighting device comprising a solid state light source and a ceramic body, wherein the solid state light source is configured to provide blue light source light to the ceramic body, wherein the ceramic body comprises a ceramic material configured to wavelength convert part of the blue light source light into yellow converter light, to provide white lighting device light comprising said blue light source light and said yellow converter light, said white lighting device light having a color point selected from the range of 0.18≤u′≤0.25 and 0.42≤v′≤0.54, and wherein the ceramic material comprises a (Y(1-y-q-z),Gdy,Luq, Cez)3(Al(1-x),Gax)5O12 ceramic material, with 0≤x≤0.6, 0≤y≤0.5, 0≤q<1 and 0.001≤z≤0.06.