OPTICAL ARRANGEMENT FOR FLAT-PANEL DISPLAYS

摘要

A flat-panel display comprises a backlight for producing narrowband activation light; a means such as a liquid-crystal modulator (21) for modulating the activation light; and a photo-luminous output screen (23) which emits visible light in response to the activation light. Instead of the activation light simply passing through the modulator onto the screen, an optical arrangement (22) is interposed between the modulator (21) and the output panel so as to project an image of the modulator onto the output screen. This reduces the requirement for collimation of the activation light.