Electrically controlled optical screen

An electrically controlled optical screen, adapted to be switched between different optical modes and comprising:

• a switchable scattering element and an electrically controlled decorating module, wherein,
• the switchable scattering element is disposed on one side of the electrically controlled decorating module and is configured to switch between a scattering state and a transparent state,
• the electrically controlled decorating module comprises a first polarizer, a first quarter-wave plate, a cholesteric liquid crystal layer, an electrically controlled wave plate, a second quarter-wave plate and a second polarizer stacked in sequence, and
• wherein the electrically controlled wave plate has a liquid crystal layer, the second polarizer is disposed between the switchable scattering element and the second quarter-wave plate, the cholesteric liquid crystal layer is configured to reflect one of left-handed circularly polarized light or right-handed circularly polarized light,
• wherein a light absorption axis of the first polarizer is perpendicular to a light absorption axis of the second polarizer, and an optical axis of the first quarter-wave plate is parallel to an optical axis of the second quarter-wave plate, or
• wherein the light absorption axis of the first polarizer is parallel to the light absorption axis of the second polarizer, and the optical axis of the first quarter-wave plate is perpendicular to the optical axis of the second quarter-wave plate.