Writing erasable paper using thermal printhead and UV illumination

摘要

A system for imaging erasable media includes a thermal print head on a first side of an erasable medium and a UV illumination source opposing the thermal print head and on a second side of the erasable medium. The thermal print head locally heats the erasable medium at a pixel level and the UV illumination source images the erasable medium only at the locally heated regions thereof. Thus the normal roles of uniformly heating the media and imaging with the UV source are reversed.