Head lamp for vehicle
US6454448B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Mar 3, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2102/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There has been a problem that in a head lamp with a prior constitution, an utilization factor of luminous flux with respect to a light source is low and the head lamp with brightness commensurate with power consumption can be obtained. According to the invention, it can be realized a head lamp 1 for a vehicle wherein a first elliptic system reflecting surface 3 having an optical axis in the illuminating direction of the head lamp and arranging a primary focus on the light source 2 and a second elliptic system reflecting surface 4 arranging the primary focus on the same light source 2 and intersecting the optical axis at approximately right angle to the optical axis of the first elliptic system reflecting surface 3 are provided, the projection lens 6, corresponding to the secondary focus of the first elliptic system reflecting surface and the shield plate 5, as required are provided, and a parabolic system reflecting surface 7 approximately taking the secondary focus as a focus, corresponding to the secondary focus of the second elliptic system reflecting surface 4 and the shield plate and taking the optical axis as the approximately illuminating direction is provided], whereby the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.