White light background lighting system, especially for flat displays, comprises blue-emitting LED chips and a diffuser foil with a coating containing a blue-to-white light conversion powder

摘要

A white light background lighting system comprises blue-emitting LED chips (12) and a diffuser foil (15) with a coating (16) containing blue/white light conversion powder. A white light background lighting system comprises blue-emitting LED chips (12) mounted on a transparent circuit board (11) and a board frame for spacing the board from a diffuser foil (15) which forms the lighting surface. The diffuser foil (15) is provided, at its inner face facing the board (11), with a coating (16) comprising a blue/white light conversion powder and a carrier material.