A projection display comprising: a transmissive spatial light modulator ; an illuminator for illuminating the modulator from the front thereof; and a hologram disposed at the rear of the modulator for imaging and reflecting back through the modulator light from the illuminator received through the modulator. Method and apparatus of the invention uses an elongated preformed muntin bar member that has a treated portion of an exposed surface of the muntin bar member. The supporting portion is provided on a rim area with fixing holes, via which fastening elements are extended to connect the supporting portion to the radiator.