Bulb-type light source apparatus and light guide member
US10738947B2 · kind B2 · utility
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1References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2015 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Jul 31, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bulb-type light source apparatus includes a light source and a light guide member. The light source is provided annularly. The light guide member includes an outer surface, a light-incident end surface opposing the light source, and an optical pattern portion configured to emit, from the outer surface, light that enters from the light-incident end surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.