▎ 摘　　要

NOVELTY - The utility model claims a fluid graphene liquid crystal device capable of being repeatedly erased and written, comprising painting and calligraphy plate, painting and calligraphy pen, circular cover and the movable push rod, the painting and calligraphy plate depth is 0.01 to 5 cm, with graphene liquid crystal dispersion in painting and calligraphy plate, painting and calligraphy plate of left and right side wall side is provided with a groove, two sides of mobile push through Z-shaped fastener are respectively installed in the groove, which can mobile push edge 100nm to 2 cm lower the graphene liquid crystal dispersion liquid. the device through graphene liquid crystal change light propagation direction, presenting on the liquid for painting effect and capable of being repeatedly erased.