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:
Oct. 16, 2007
Claes Goran Granqvist, Uppsala, SE;
Claes Goran Granqvist, Uppsala, SE;
ChromoGenics AB, Uppsala, SE;
Abstract
An illumination system () is based on a window () having controllable transmittance and a light guide system () arranged for transferring light from a light guide input () to a light guide output (). The light guide output is located in a same space () as the window (), but at a distance therefrom (). The illumination system includes elements for balancing () the transmittance of the window and a throughput of the light guide system. Preferably, the window is an outer window, the light guide input () is arranged for gathering day light and the light guide output () is arranged to illuminate an area () within sight from the window (). Preferably the transmittance of the window () and/or the light throughput of the light guide system () are controlled. A method for illuminating a space () having a window () with controllable transmittance is presented.