Invention Application
- Patent Title: WAVELENGTH CONVERTING MEMBER AND PROJECTOR INCLUDING THE WAVELENGTH CONVERTING MEMBER
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Application No.: US15430735Application Date: 2017-02-13
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Publication No.: US20170153536A1Publication Date: 2017-06-01
- Inventor: Naoki SAKA , Yoshinori MURAZAKI , Isamu NIKI
- Applicant: NICHIA CORPORATION
- Priority: JP2014-236981 20141121
- Main IPC: G03B21/20
- IPC: G03B21/20 ; H04N9/31 ; G02B26/00

Abstract:
A wavelength converting member includes at least a first, second, and third regions, circumferentially on a disc-shaped light-transmissive substrate. The first region includes, from a light incident direction, a first and second phosphor layers. The first phosphor layer includes a first phosphor to absorb at least part of incident light and to emit a first light having a wavelength different from the incident light. The first phosphor layer defines an indentation in a surface on the second phosphor layer side, with a depth a half or more of the thickness of a portion of the first phosphor layer absent of the indentation. The second phosphor layer includes a second phosphor to absorb at least part of the first light emitted by the first phosphor and to emit a second light having a wavelength different from the first light, and is disposed in the indentation of the first phosphor layer.
Public/Granted literature
- US09823557B2 Wavelength converting member and projector including the wavelength converting member Public/Granted day:2017-11-21
Information query