Theater seats determines the audience's personal comfort, most theaters now have 4 d dynamic screens, 4 d motion seat affect the audience's perceptions of the effects and dynamic, also directly affect the cinema. In what is now the "cinema as king, terminal winner" cases, 4 d motion seat is more and more important position. 4 d motion seat three degrees of freedom simulation platform of electric cylinder, servo controller, electric parts, synchronous broadcasting system is the most important part. 4 d motion seat and a few big indicators: seat noise big, the top of the back of a chair, the back of a chair. The support and seat Angle of the back of a chair, to determine whether the audience feel the most comfortable. Backrest Angle should be at 100 ° to 110 ° advisable, seat Angle should be 4 ° to 10 ° advisable.