Illumination device for simulating neon or similar lighting in various colors
US7264367B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2006 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | May 15, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device has a light source, a waveguide, and a light-transmitting medium. The light source emits light of a first color. The waveguide has both optical waveguide and light scattering properties. The light-transmitting medium is composed of a matrix of substantially translucent material doped with a pigment, and is positioned between the light source and the waveguide such that a portion of the light emitted by the light source passes around the light-transmitting medium and reaches the waveguide directly, and a portion of the emitted light is received by the light-transmitting medium. The pigment changes a portion of the received light to a light of a second color. The waveguide receives and mixes the light of the first color and the light of the second color, and emits light of a combined color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.