Lamp unit for vehicular headlamp
US8678629B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2010 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Aug 9, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/321
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp unit for a vehicular headlamp includes: a projection lens arranged to have an optical axis extending in a vehicle longitudinal direction; a light-emitting element that is a light source arranged on a rear side with respect to a rear focal point of the projection lens; and a reflector that is formed so that a longitudinal section of the reflector has the shape of an ellipse having a first focal point at a center of light emission of the light-emitting element and a second focal point at the rear focal point of the projection lens, wherein the reflector is arranged to cover the light-emitting element and reflects irradiated light toward the projection lens, the irradiated light being light irradiated from the light-emitting element. A major axis of the ellipse, passing through the first focal point and the second focal point, is inclined with respect to the optical axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.