LCD Backlighting with LED Phosphors

Backlighting system having at least one white light source which comprises at least one semiconductor diode and at least one phosphor layer comprising a combination of at least two phosphors which emit red and green light.

White light source which comprises a blue-emitting indium aluminium gallium nitride semiconductor, in particular of the formula IniGajAlkN, where 0≦i, 0≦j, 0≦k, and l+j+k=1, and a phosphor layer comprising a combination of at least two phosphors which emit red and green light.

Process for the production of a liquid-crystal display fitted with a backlighting system having a white light source, comprising the following steps:

• Production of at least one LED which is built up from a blue-emitting InGaAlN semiconductor, in particular of the formula IniGajAlkN, where 0≦i, 0≦j, 0≦k, and l+j+k=1, and a phosphor layer which comprises a combination of a red-emitting phosphor and a green-emitting phosphor.
• Installation of one or more LEDs in a housing to give a backlighting system containing diffusers and reflectors.
• The backlighting system is combined with a corresponding liquid-crystal unit, containing a front plate with a coloured-filter system, to give the liquid-crystal display.