Improved side-light distribution systems are disclosed. In one embodiment, an efficient side-light distribution system includes a LED light source; a light coupler for receiving light from the LED light source at a first end and providing light at a second end to an elongated light pipe, and the elongated light pipe receives light from the LED light source at a first end and transmitting the light towards a second end. The coupler transforms at least the angular distribution of at least 70% of the light from the LED light source into an appropriate angular distribution needed for total internal reflection at a second end within the elongated light pipe. The light coupler includes a light-extraction means between the first and second ends of the light coupler for extracting light out of a side of the light coupler. At least part of the light within the light pipe is extracted out of a side of the light pipe, between the first and second ends of the light pipe, by a light-extraction means.
申请公布号
WO2012027421(A4)
申请公布日期
2012.04.12
申请号
WO2011US48879
申请日期
2011.08.23
申请人
ENERGY FOCUS, INC.
发明人
FRANKIEWICZ, GREGORY, P.;BUELOW, ROGER, F.;MARTINS, JEREMIAS, A.;BINA, DAVID;JENSON, CHRIS, H.