公开(公告)号：EP3469423B1

公开(公告)日：2020-04-15

申请号：EP17734890.1

申请日：2017-06-09

申请人： Osram Sylvania Inc. ,  OSRAM GmbH

发明人： LENEF, Alan ,  EBERHARDT, Angela ,  PESKOLLER, Florian ,  JOHNSTON, David ,  SORG, Joerg ,  AVALLON, James ,  KELSO, John ,  RAUKAS,Madis ,  WIRTH-SCHÖN, Joachim ,  SPRENGER, Dennis

IPC分类号： G03B21/20

公开(公告)号：EP3469423A1

公开(公告)日：2019-04-17

申请号：EP17734890.1

申请日：2017-06-09

申请人： Osram Sylvania Inc. ,  OSRAM GmbH

发明人： LENEF, Alan ,  EBERHARDT, Angela ,  PESKOLLER, Florian ,  JOHNSTON, David ,  SORG, Joerg ,  AVALLON, James ,  KELSO, John ,  RAUKAS,Madis ,  WIRTH-SCHÖN, Joachim ,  SPRENGER, Dennis

IPC分类号： G03B21/20

摘要： Techniques for bonding a luminescent material to a thermally conductive substrate using a low temperature glass to provide a wavelength converter system are provided. A dichroic coating is deposited on a thermally conductive substrate. The dichroic coating includes alternating layers of a first material having a first refractive index and a second material having a second refractive index which is greater than the first refractive index. A buffer layer is deposited on the dichroic coating. A wavelength converter is bonded to the buffer layer by a layer of low temperature glass. In some embodiments, the wavelength converter includes a phosphor for converting a primary light from an excitation source into a secondary light.

公开(公告)号：EP3259784A1

公开(公告)日：2017-12-27

申请号：EP16708280.9

申请日：2016-02-12

申请人： Osram Sylvania Inc.

发明人： LENEF, Alan ,  HAMBY, David ,  AVALLON, James

IPC分类号： H01L33/54 ,  H01L25/075 ,  H01L33/56 ,  H01L33/60

CPC分类号： H01L33/60 ,  H01L25/0753 ,  H01L33/56 ,  H01L2933/0091

摘要： There is herein described a light source that homogenizes the light produced by a large area array of forward directed LEDs mounted on highly reflective substrate, while achieving a low-profile form factor and maintaining high efficacy. The LED light source employs a diffuser comprised of two diffusing layers: a low scattering diffusing layer bonded to the LEDs and a high scattering diffusing layer that is bonded to the low scattering diffusing layer. The LED light source achieves good diffuse illumination with a thin diffuser by making use of a light channeling effect between the highly reflective substrate and the high backscattering from the high scattering diffusing layer.