A light module having a first power line, a second power line, and light devices. The first power line is connected to a first power point. The second power line is connected to a second power point. Each light device having a first terminal coupled to the first power line and a second terminal coupled...http://www.google.de/patents/US6964531?utm_source=gb-gplus-sharePatent US6964531 - Light module and keyboard utilizing same
