Thermosensitive imaging screen structure for colour displays - using red-green-blue colour matrix with optically active transparent and partially or completely opaque layers

摘要

Backing material (11) of paper, plastics material, ceramic etc. is covered by black film (12). A thermosensitive layer (13) is superimposed, and may be transparent, partially or completely opaque according to temp. When opaque it appears white. A thermal isolation layer (14) may be used. A regular mosaic (15) of red, blue and green coloured windows is superimposed. A display screen of this construction is then illuminated by a high intensity scanning light source to form a coloured text, graphics or photographic image in both grey scales and colours. USE/ADVANTAGE - Reusable large area displays controlled by scanning illumination or heating system.