Thermochromatic display device

A thermochromatic display device, comprising:

• a first electrode sheet comprising a plurality of first row electrodes and a plurality of first line electrodes, the plurality of first row electrodes intersect with the plurality of first line electrodes to form a plurality of first electrode cells;
• a second electrode sheet facing the first electrode sheet and comprising a plurality of second row electrodes and a plurality of second line electrodes, the plurality of second row electrodes intersect with the plurality of second line electrodes to form a plurality of second electrode cells, the plurality of second electrode cells corresponding to the plurality of first electrode cells in a one-by-one manner to form a plurality of display cells;
• and
• a plurality of thermochromatic elements located in the plurality of display cells in a one-to-one manner and located between the first electrode sheet and the second electrode sheet;
• each of the plurality of thermochromatic elements comprising:
• a sealed enclosure comprising a semitransparent upper sheet and a lower sheet opposite to the semitransparent upper sheet, the sealed enclosure defining a chamber between the semitransparent upper sheet and the lower sheet;
• a first transparent heating element located on the semitransparent upper sheet and comprising a carbon nanotube film comprising:
• a plurality of carbon nanotube linear units spaced from each other and substantially extending along a first direction, each of the plurality of carbon nanotube linear units comprising a plurality of first carbon nanotubes substantially oriented along the first direction;
• and
• a plurality of carbon nanotube groups combined with the plurality of carbon nanotube linear units by van der Waals force, the plurality of carbon nanotube groups between adjacent carbon nanotube linear units spaced from each other in the first direction;
• a second heating element located on the lower sheet;
• and
• a colorful material layer located in the chamber, the first transparent heating element and the second heating element asynchronously capable of heating the colorful material layer to make the colorful material layer move between the first transparent heating element and the second heating element in response to the heat produced by the first transparent heating element and the second heating element;
• wherein in each of the plurality of thermochromatic elements, the first transparent heating element is electrically connected with the one of the plurality of first row electrodes and one of the plurality of first line electrodes;
• and the second heating element is electrically connected with the one of the plurality of second row electrodes and one of the plurality of second line electrodes.