Invention Grant
- Patent Title: Wavelength converting member and projector including the wavelength converting member
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Application No.: US14947072Application Date: 2015-11-20
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Publication No.: US09609293B2Publication Date: 2017-03-28
- Inventor: Naoki Saka , Yoshinori Murazaki , Isamu Niki
- Applicant: NICHIA CORPORATION
- Applicant Address: JP Anan-Shi
- Assignee: NICHIA CORPORATION
- Current Assignee: NICHIA CORPORATION
- Current Assignee Address: JP Anan-Shi
- Agency: Squire Patton Boggs (US) LLP
- Priority: JP2014-236981 20141121
- Main IPC: H04N9/31
- IPC: H04N9/31 ; G02B26/00 ; G02B27/14 ; G03B21/20 ; G03B21/00 ; G03B33/08

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
- US20160150200A1 WAVELENGTH CONVERTING MEMBER AND PROJECTOR INCLUDING THE WAVELENGTH CONVERTING MEMBER Public/Granted day:2016-05-26
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