Display device provided with mems light valve and forming method thereof

A display device with a micro-electromechanical system (MEMS) light valve, comprising:

• a substrate, on which a bayonet is formed;
• and
• a fixed optical grating and a MEMS light valve above the substrate, wherein the MEMS light valve is used to control the fixed optical grating to open or close,
• wherein the MEMS light valve comprises:
• a movable optical grating formed in the bayonet, wherein the movable optical grating is electrically coupled to the bayonet when in contact with the bayonet;
• and
• at least one movable electrode and at least one fixed electrode, wherein the at least one movable electrode comprises one end fixed to and electrically connected with the movable optical grating and another end suspended, the at least one fixed electrode is disposed on one side or two sides of the movable electrode and constitute a capacitor with the at least one movable electrode, the movable electrode is configured to be controlled to drive the movable optical grating to move in the bayonet by controlling an electrical potential difference between the at least one fixed electrode and the movable electrode, such that the fixed optical grating is configured to be opened or closed.