Invention Grant
- Patent Title: Wavelength conversion element, phosphor wheel, light source device, and projection display apparatus
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Application No.: US16386883Application Date: 2019-04-17
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Publication No.: US10921697B2Publication Date: 2021-02-16
- Inventor: Takashi Ikeda , Makoto Maeda , Yusaku Nishikawa
- 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: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2018-084824 20180426,JP2019-033629 20190227
- Main IPC: G03B21/20
- IPC: G03B21/20 ; G02B26/00 ; G03B21/00
Abstract:
A wavelength conversion element includes a first phosphor region and a second phosphor region. The second phosphor region is disposed in a thickness direction of the first phosphor region and has a phosphor particle with a particle size different from a particle size of a phosphor particle positioned in the first phosphor region.
Public/Granted literature
- US20190331991A1 WAVELENGTH CONVERSION ELEMENT, PHOSPHOR WHEEL, LIGHT SOURCE DEVICE, AND PROJECTION DISPLAY APPARATUS Public/Granted day:2019-10-31
Information query
