ELECTROLUMINESCENT COLOR-CHANGE TECHNOLOGY

摘要

A variable-color display system has at least one area of electroluminescent material, a power supply connected to the area of electroluminescent material, providing electromotive force (emf) to the material, and variable frequency control circuitry for controlling frequency of application of the emf applied to the area of electroluminescent material, wherein by varying the frequency the apparent color of the display is changed. In some embodiments pixilated displays are provided.