Invention Application
- Patent Title: LIGHT EMITTING DEVICE WITH IMPROVED WARM-WHITE COLOR POINT
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Application No.: US17064487Application Date: 2020-10-06
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Publication No.: US20210018152A1Publication Date: 2021-01-21
- Inventor: Wouter SOER , Hans-Helmut BECHTEL
- Applicant: LUMILEDS LLC
- Applicant Address: US CA SAN JOSE
- Assignee: LUMILEDS LLC
- Current Assignee: LUMILEDS LLC
- Current Assignee Address: US CA SAN JOSE
- Priority: EP18151002.5 20180110
- Main IPC: F21K9/64
- IPC: F21K9/64 ; H01L25/075 ; H01L33/50 ; C09K11/08 ; F21V23/00 ; F21V7/22 ; C09K11/77 ; F21K9/62

Abstract:
A light emitting device is disclosed and includes an emission source configured to emit a primary blue light and a wavelength-converting element configured to convert the primary blue light to a secondary light having a correlated color temperature (CCT) in the range of 1600K-2500K and color rendering index (CRI) in the range of 40-60, the wavelength-converting element including a red phosphor material having a peak emission wavelength that is less than 620 nm and a green phosphor material having a peak emission wavelength that is greater than 530 nm. The device may exhibit a melanopic/photopic ratio of less than 0.25 and/or may exhibit a radiometric power fraction of light having a wavelength below 530 nm below.
Public/Granted literature
- US11231148B2 Light emitting device with improved warm-white color point Public/Granted day:2022-01-25
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