LED spotlight illumination system
US6527419B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Oct 12, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention includes an illumination assembly consisting of a light source such as a light emitting diode (LED) that produces a near field image and a means of imaging and focusing the near field image. The LED includes a chemical light emitting chip, a reflector cup and a phosphor coating over both the emitter chip and the reflector cup to produce a uniform, concentrated, high intensity near field image. The LED also has a clear housing having a narrow angle beam distribution. The means for imaging and focusing the near field image is a convex optical lens having a radius of curvature equal to twice the overall thickness of the lens. The optical lens is installed in fixed spaced relation to the LED such that the lens is imaging the reflector cup of the LED rather than the light on the surface clear LED housing. The light beam produced by the present invention has a uniform light intensity distribution over the entire surface of the beam far field and produces a light image having a sharp defined line between the illuminated and non-illuminated areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.