An auxiliary panel, includes two auxiliary liquid crystal panels provided in a stack, wherein each of the auxiliary liquid crystal panels includes a liquid crystal layer, a first substrate and a second substrate provided opposite to each other to form a cell, the liquid crystal layer is encapsulated between the first substrate and the second substrate, the first substrate includes a first base substrate and a first transparent electrode layer, the second substrate includes a second base substrate and a second transparent electrode layer comprising a plurality of second transparent electrodes arranged in a matrix, a number of the second transparent electrodes is equal to a number of the second transparent electrodes, the second transparent electrodes on one of the auxiliary liquid crystal panels and the second transparent electrodes on the other of the auxiliary liquid crystal panels have corresponding positions and the same shape.