Lamp, optical module, vehicle headlight including the same, and method for controlling color tone of emitted light
US7703961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2006 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Mar 26, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp, an optical module, a vehicle headlight, and a method for controlling a color tone of the same can be configured to ensure visibility of the surroundings of a vehicle on a wet road in rainy weather, in dense fog, and on a snowpacked road, for example. The lamp can include a first LED chip which emits blue light, a second LED chip which emits light with a different color from blue. A wavelength conversion layer can be provided in front of light emitting areas of the first and second LED chips in an emitting direction, and can include a wavelength conversion material. A driving control unit can be configured to drive and control the first and second LED chips. The optical module can be configured to include the lamp along with optical components, such as a reflector. A vehicle headlight can include a plurality of optical modules. The control unit can be configured to control the ratio of light from the first and second LED chips, thereby obtaining light of a desired color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.