Vehicular headlamp with semiconductor light emitting elements and electric discharge bulb
US7201506B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2004 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | May 5, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A plurality of lamp piece units constituting light sources by semiconductor light emitting elements are used as a first lamp piece unit which is lighted in a low beam mode. Additionally, a single lamp piece unit constituting a light source by an electric discharge bulb color temperature of emitted light of which is as high as that of the semiconductor light emitting element, is used as a second lamp piece unit, which is additionally lighted in a high beam mode. When the beam is switched from the low beam to the high beam, pale irradiated light from the first lamp piece unit is added with pale irradiated light from the second lamp piece unit to thereby provide an impression for the driver and/or passenger of unity in colors between the two lamp piece units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.