Invention Grant
- Patent Title: Light-emitting device
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Application No.: US16297299Application Date: 2019-03-08
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Publication No.: US10680402B2Publication Date: 2020-06-09
- Inventor: Kento Hayashi , Satoshi Wada , Yuhki Kawamura
- Applicant: TOYODA GOSEI CO., LTD.
- Applicant Address: JP Kiyosu-Shi, Aichi-Ken
- Assignee: TOYODA GOSEI CO., LTD.
- Current Assignee: TOYODA GOSEI CO., LTD.
- Current Assignee Address: JP Kiyosu-Shi, Aichi-Ken
- Agency: McGinn IP Law Group, PLLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@29729c03
- Main IPC: H01S5/00
- IPC: H01S5/00 ; H01S5/022 ; H01S5/40

Abstract:
Provided is a light-emitting device having low angle dependence of chromaticity as well as achieving wide-angle light distribution. The light-emitting device has a semiconductor laser diode, a first lens, a second lens, and a wavelength converting part for converting the wavelength of the laser beam emitted from the semiconductor laser diode. The first lens has a first spread angle and refracts the laser beam emitted from the semiconductor laser diode. The second lens has a second spread angle and refracts the laser beam refracted by the first lens. The second spread angle is larger than the first spread angle.
Public/Granted literature
- US20190288482A1 LIGHT-EMITTING DEVICE Public/Granted day:2019-09-19
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