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:
Mar. 13, 2012
Filed:
Dec. 12, 2007
Maurice Alexander Hugo Donners, Eindhoven, NL;
Cornelis Jojakim Jalink, Eindhoven, NL;
Gerardus Arnoldus Rita Van Dijk, Eindhoven, NL;
Vincent Fischer, Eindhoven, NL;
Hans Van Sprang, Eindhoven, NL;
Maurice Alexander Hugo Donners, Eindhoven, NL;
Cornelis Jojakim Jalink, Eindhoven, NL;
Gerardus Arnoldus Rita Van Dijk, Eindhoven, NL;
Vincent Fischer, Eindhoven, NL;
Hans Van Sprang, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a light source for generating light having a spectral emittance in at least a part of the range of 380 nm to 780 nm, the light having a spectral power distribution E(λ) as a function of the wavelength λ, and a general color-rendering index Ra, wherein the ratio of the integral spectral power distribution over a first range of 575 nm≦λ≦650 nm to that of a second range of 380 nm≦λ≦780 nm is given by the relation: and wherein B, ≦0.15 and Ra≧20. The light generated by the light source has a relatively small disturbing effect on migrating birds, while it still allows acceptable visibility for human beings.