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1. (WO2018146084) LED UNIT

Pub. No.:    WO/2018/146084    International Application No.:    PCT/EP2018/052922
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Wed Feb 07 00:59:59 CET 2018
IPC: H01L 25/075
H01L 33/50
H01L 33/46
H01L 33/60
Applicants: OSRAM OPTO SEMICONDUCTORS GMBH
Inventors: GHASEMI AFSHAR, Farhang
WIRTH, Ralph
Title: LED UNIT
Abstract:
The invention relates to an LED unit (100, 300) comprising a substrate (105) provided with a first LED chip (110) comprising a first light-emitting surface (115) and arranged on the substrate (105) in such a way that light emitted thereby radiates in a direction of radiation (Z) of the LED unit (100, 300). The LED unit (100, 300) is also provided with a second LED chip (120) comprising a second light-emitting surface (125) and arranged above the first LED chip (110) in such a way that the second LED chip (120) at least partially covers the first LED chip (110) and radiates light emitted thereby in the direction of radiation (Z) of the LED unit (100, 300). Furthermore, the LED unit (100, 300) comprises a first conversion layer (135) and a second conversion layer (140), the first conversion layer (135) at least partially covering the first light-emitting surface (115) and/or at least partially laterally surrounding the first LED chip (110), and the second conversion layer (140) at least partially covering the second LED chip (120).