Display module, display device, and preparation method and control method of display device

The invention relates to the technical field of display, in particular to a display module, a display device, a preparation method and a control method of the display device.The display module comprises a control part, a display part and a solar battery pack which are sequentially arranged, the display part comprises a first alignment layer, liquid crystal molecules and a sealing part, and the first alignment layer is arranged on the control part; a second alignment layer is arranged on the first alignment layer, the liquid crystal molecules are arranged between the first alignment layer and the second alignment layer, and the sealing part is used for sealing the liquid crystal molecules between the first alignment layer and the second alignment layer. In conclusion, power is supplied to the display part and the control part through the solar battery pack, deflection of the liquid crystal molecules is controlled through the control part, the display module gradually changes from the bright state to the dark s