- Patent Title: Light source device comprising wavelength converting member with first converting material and second converting material that emits light having a wavelength longer than the first with an after glow time of the second longer than an emission
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Application No.: US16822504Application Date: 2020-03-18
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Publication No.: US10928038B2Publication Date: 2021-02-23
- Inventor: Yudai Shibata , Shintaro Hayashi
- Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Applicant Address: JP Osaka
- Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JPJP2019-063402 20190328
- Main IPC: F21V9/32
- IPC: F21V9/32 ; F21V7/04
Abstract:
A wavelength converting member includes a first wavelength converting material and a second wavelength converting material. The emission wavelength of the second wavelength converting material is longer than the emission wavelength of the first wavelength converting material, and in the second wavelength converting material, the time from when excitation light stops to when fluorescence stops is an afterglow time, and the afterglow time is longer than the emission time of the first wavelength converting material and is 1 s or less. A light source device includes the wavelength converting member and a light source unit. A lighting device includes the wavelength converting member, a light source device, and a light guide disposed between the light source unit and the wavelength converting member.
Public/Granted literature
- US20200309348A1 WAVELENGTH CONVERTING MEMBER, LIGHT SOURCE DEVICE, AND LIGHTING DEVICE Public/Granted day:2020-10-01
Information query
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