Multi-color semiconductor lamp and method of providing colored illumination
US6179449A · kind A · utility
Inventor
Key dates
| Filing date | Jun 23, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Jun 23, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multi-color semiconductor lamp includes a semiconductor light source activable so as to generate a light output, a dispersing prism and a lens. The prism has an input side located in front of the light source to receive the light output, and an output side, and separates the light output of the light source into a plurality of chromatic components that radiate at different angles at the output side. The lens is disposed in front of the output side of the prism such that a vertex of a conical focusing region associated with the lens is located at the output side of the prism. The light source is activated when the spatial position of one of the light source and the prism relative to the other one of the light source and the prism has been varied such that a selected one of the chromatic components is registered with the conical focusing region of the lens. The semiconductor lamp can thus be controlled so as to generate different colored light outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.