Abstract
Changes have been measured in the four polarised components of fluorescence for various dye-tagged minerals, pigments and liquid crystals. Using short-duration pulsed electric fields, the electro-fluorescence principle is shown to have potential as the basis for an optical shutter for display devices. Measurements are reported for a range of materials including nematogen liquid crystals with added dye which is the basis of the 'guest-host' arrangement. Data on clay mineral and pigment particles are shown to offer switching contrasts which, in special cases, approach the optimum achievable. Their potential for fast, multicoloured, lambertian display elements is indicated.