Light source apparatus and vehicular headlight
US10724705B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2019 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jun 24, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/675
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source apparatus includes: a laser light source; a fluorescent material plate including a laser beam irradiation region and being capable of emitting light generated by irradiating the laser beam irradiation region with a laser beam; a light scanning mechanism capable of scanning the laser beam irradiation region with the laser beam; a first transparent conductive film pattern disposed on the fluorescent material plate in the laser beam irradiation region; a second transparent conductive film pattern disposed on the fluorescent material plate outside the laser beam irradiation region and connected to the first transparent conductive film pattern to constitute a continuous series connection wiring; and an electric circuit electrically connected to the second transparent conductive film pattern, detect a change in a resistance value of the series connection wiring, and function to stop the driving of the laser light source when the resistance value falls outside a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.