Light source device including a high energy light source and a wavelength conversion member, illuminating device comprising the same, and vehicle
US9142733B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2014 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Jul 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8515
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light source device is provided. The light source device comprises a semiconductor light-emitting element; and a wavelength conversion member for converting a wavelength of a light emitted from the semiconductor light-emitting element. The semiconductor light-emitting element has a light-emitting peak wavelength of not less than 380 nanometers and not more than 420 nanometers. The light emitted from the semiconductor light-emitting element has a light energy density of not less than 0.2 kW/cm2. The wavelength conversion member contains at least one fluorescent substance selected from the group consisting of a (Sr1-x,Bax)3MgSi2O8:Eu2+ (0≦x≦1) fluorescent substance, a (Y1-y,Gdy)3(Al1-z,Gaz)5O12:Ce3+ (0≦y≦1, 0≦z≦1) fluorescent substance, and an Eu3+-activated fluorescent substance. The light source device has a high output and a high light-emitting efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.