Vehicular headlamp having a columnar light guide
US8632232B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2011 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Jul 6, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S43/245
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vehicle lamp includes, within a lamp chamber formed by a lamp body and a front cover, a light source, a columnar light guide having an incident portion at the end thereof in the vicinity of the light source, and an annular reflecting portion arranged in the vicinity of the light source side of the incident portion. The columnar light guide guides incident light from the light source, which enters via the incident portion, and irradiates the incident light from a light-emitting portion on a front side. The annular reflecting portion reflects light with a large emission angle, which has not been able to directly enter the incident portion from the light source, toward the incident portion. The light source is arranged on a central axis of the annular reflecting portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.