Display

A display comprising:

• a light source and an image display panel disposed in an optical path from the light source;
• wherein the light source comprises a primary light source for emitting light in a primary wavelength range and a re-emission material for, when illuminated by light from the primary light source, re-emitting light in a wavelength range different from the primary wavelength range;
• wherein the re-emission material comprises at least a first nanophosphor material for, when illuminated by light from the primary light source, re-emitting light in a first wavelength range different from the primary wavelength range;
• and wherein the image display panel comprises a first filter having a first narrow passband or a first narrow absorption band, the first narrow passband or first narrow absorption band being aligned or substantially aligned with the first wavelength;
• and wherein the first filter is a green filter and the passband or absorption band of the green filter has a full width at half maximum (FWHM) of 100 nm or less.