Structure of headlamps for vehicles
US4972307A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 5, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | May 5, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/692
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A structure is provided for headlamps for vehicles, having a light source, a reflector, and a front lens in which the lens is slanted with respect to a vertical direction of a vehicle body, a rear surface of the lens is formed with a prism zone for forming a light diffusion zone on a light distribution pattern of a given screen and another prism zone for forming a hot zone on the distribution pattern, and the reflector is formed with a first reflecting surface which corresponds optically to the light diffusion zone forming prism zone and diffuses light beams emitted from the light source in a horizontal cross section with respect to an optical axis of the light source and reflects the light beams of the light source substantially in parallel to the optical axis in a vertical cross section and with a remaining reflecting surface substantially in the form of a paraboloid of revolution. Consequently, both ends of the light distribution pattern in the horizontal direction neither droop nor rise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.