Liquid crystal handwriting board

A liquid crystal handwriting board, comprising:

• a first substrate and a second substrate that are disposed opposite to each other, and a liquid crystal layer disposed between the first substrate and the second substrate, the liquid crystal layer comprising bistable liquid crystal molecules;
• wherein the first substrate comprises:
• a first base substrate, and a transistor and a pixel electrode disposed at a side, proximal to the second substrate, of the first base substrate, the transistor being electrically connected to the pixel electrode;
• wherein the transistor comprises a channel region, wherein a ratio of an area of the channel region to an on-current of the transistor is greater than a ratio of an area of a channel region of a reference transistor to an on-current of the reference transistor, the ratio of the area of the channel region of the reference transistor to the on-current of the reference transistor being 32.5.