Illumination device for simulating neon or fluorescent lighting including a waveguide and a scattering cap
US7008097B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2004 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Mar 31, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device includes: an optical waveguide having a first lateral surface for emitting light and a second lateral surface for receiving light; a scattering cap secured to the first lateral surface of and extending substantially the length of the waveguide; and a light source (e.g., a plurality of LEDs spaced a predetermined distance from one another) positioned adjacent to the light-receiving surface of the waveguide. Light entering the waveguide is efficiently transmitted to the scattering cap and is then preferentially scattered so as to exit with a broad elongated light intensity distribution pattern being formed along a lateral surface of the scattering cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.