Invention Grant
- Patent Title: Conversion LED with high color rendition index
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Application No.: US14985644Application Date: 2015-12-31
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Publication No.: US10020429B2Publication Date: 2018-07-10
- Inventor: Frank Baumann , Norbert Boenisch , Tim Fiedler , Frank Jermann , Stefan Lange , Reiner Windisch
- Applicant: OSRAM OPTO SEMICONDUCTORS GMBH
- Applicant Address: DE Regensburg
- Assignee: OSRAM Opto Semiconductors GmbH
- Current Assignee: OSRAM Opto Semiconductors GmbH
- Current Assignee Address: DE Regensburg
- Agency: Cozen O'Connor
- Priority: DE102009037730 20090817
- Main IPC: C09K11/08
- IPC: C09K11/08 ; C09K11/77 ; H01L33/50 ; C04B35/581 ; C04B35/584

Abstract:
Conversion LED emits primary radiation (peak wavelength 435 nm to 455 nm) and has a luminescent substance-containing layer positioned to intercept the primary radiation and convert it into secondary radiation. First and second luminescent substances are used. The first luminescent substance is a A3B5O12:Ce garnet type emitting yellow green having cation A=75 to 100 mol. % Lu, remainder Y and a Ce content of 1.5 to 2.9 mol. %, where B=10 to 40 mol. % Ga, remainder Al. The second luminescent substance is of the MAlSiN3:Eu calsine type which emits orange red, where M is Ca alone or at least 80% Ca and the remainder of M may be Sr, Ba, Mg, Li or Cu, in each case alone or in combination, wherein some of the Al up to 20%, can be replaced by B, and wherein N can be partially replaced by O, F, Cl, alone or in combination.
Public/Granted literature
- US20160111609A1 Conversion LED with High Color Rendition Index Public/Granted day:2016-04-21
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