The LED backlighting panel includes a roughened flat surface area and side edges with holes therein for receiving light emitting diodes that are supplied from a direct current power source which can have an adjustable duty cycle to provide a backlighting panel that has a minimal power consumption in...http://www.google.fr/patents/US4573766?utm_source=gb-gplus-shareBrevet US4573766 - LED Staggered back lighting panel for LCD module
