The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2013
Filed:
Aug. 29, 2011
Israel J. Morejon, Tampa, FL (US);
Jinhui Zhai, Oldsmar, FL (US);
Israel J. Morejon, Tampa, FL (US);
Jinhui Zhai, Oldsmar, FL (US);
Lednovation, Inc., Tampa, FL (US);
Abstract
A solid state directional lighting device includes a semiconductor light source emitting a primary short wavelength light and a light collimation component disposed in light-reflecting relation to the light source to generate a collimated light with beam divergence angle less than forty degrees (40°). A luminescent nanocrystal conversion layer is disposed in the path of the collimated light and includes a luminescent nanocrystal conversion layer including luminescent nanocrystal particles with nano-particles sizes less than fifteen nanometers (15 nm). The luminescent nanocrystal particles absorb at least a portion of the collimated short wavelength light and convert the absorbed light into at least one long wavelength spectral light. A mixture of leakage primary short wavelength light and long wavelength light converted by the luminescent nano-particles produces a directional white light with luminous efficacy of at least one hundred lumens per Watt (100 lm/W). Light scattering is reduced due to the nano-particle size.