The principle is that when subjected to pressure or voltage, the liquid crystal molecules will rotate to change the arrangement structure, which in turn affects the incident light and changes the handwriting display.
When writing, by pressing the surface of the blackboard, it can reflect natural light and display green highlight handwriting; when erasing the handwriting, only a small amount of current needs to be applied to restore the arrangement of liquid crystal molecules.
Therefore, any (non-sharp) hard tool can be used to written on the Wicue dust-free blackboard, which provides great convenience for daily writing and drawing. Since the handwriting on Wicue blackboard reflects natural light instead of self-illumination, it does not contain blue light radiation and can effectively protect users' eyesight.