A circuit board on which the electronic components providing power to a series of light sources is positioned as near as possible to light sources in order to minimize parasitic energy losses which would be introduced by lengths of wiring. The light sources are usually elongate tubular Cold Cathode Fluorescent...http://www.google.com/patents/US7439683?utm_source=gb-gplus-sharePatent US7439683 - Backlighting system for display screen
