Disclosed is a liquid crystal device having improved assembly workability. To dampen vibration, each set of wings move 180 degrees out of phase. When a self-supporting characteristic of the gel film becomes higher than one limit value, the gel film is stripped from the rotary drum by use of a stripping roller, to obtain the cellulose triacetate film. In another embodiment, the image may be redirected onto another object. The user input signal triggers performing a function on a motion sensor signal for a period of time. A first step that any of the plurality of equipment obtains environment information of that equipment and another equipment if necessary and a second step that any of the equipment determines the notification method depending on the environment information obtained by the first step and a contents of information concerning the function of any of the equipment.