Invention Grant
- Patent Title: Light emitting device and light source
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Application No.: US16261564Application Date: 2019-01-30
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Publication No.: US10741732B2Publication Date: 2020-08-11
- Inventor: Taiki Yuasa
- Applicant: NICHIA CORPORATION
- Applicant Address: JP Anan-shi
- Assignee: NICHIA CORPORATION
- Current Assignee: NICHIA CORPORATION
- Current Assignee Address: JP Anan-shi
- Agency: Mori & Ward, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@5ea2fc53
- Main IPC: H01L29/20
- IPC: H01L29/20 ; H01L33/00 ; H01L33/50 ; H01L33/60 ; C09K11/08 ; H01L33/32 ; H01L27/15 ; C09K11/77 ; H01L33/56

Abstract:
A light emitting device includes at least one first light emitting element to emit a first light and at least one fluorescent material to convert the first light to a second light. The second light has chromaticity existing in an enclosed area in a CIE 1931 chromaticity diagram. The CIE 1931 chromaticity diagram has a curved boundary indicating a spectral locus. The enclosed area is enclosed with a first straight line, a second straight line, a third straight line, and a curved line. The first straight line connects a first point at which x is equal to 0.666 and y is equal to 0.334 and a second point at which x is equal to 0.643 and y is equal to 0.334. The second straight line connects the second point and a third point at which x is equal to 0.576 and y is equal to 0.291. The third straight line connects the third point and a fourth point at which x is equal to 0.737 and y is equal to 0.263. The curved line connects the fourth point and the first point. The curved line is a part of the curved boundary.
Public/Granted literature
- US20190237635A1 LIGHT EMITTING DEVICE AND LIGHT SOURCE Public/Granted day:2019-08-01
Information query
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