Functions of various projection screens

1) The front curtain is located close to the inside of the stage, used to hang the name or slogan of the meeting or performance, and display the theme. There are lifting type and fixed type.　　 (2) The big curtain Behind the front curtain is the big curtain, which is used to change the scene in the performance. The brightly colored and fashionable big screen gives the audience artistic enjoyment.　　The big screen has the form of lifting type, side-by-side, lifting side-by-side, tandem, butterfly screen and so on. The lifting curtain can move up and down; the side-opening curtain can open and close horizontally; the lifting side-opening curtain can realize the lifting of the curtain at the same time, and the two-dimensional space movement can be divided; the tandem curtain is controlled by multiple motors, each The drawing motor controls a wire rope drawing point. The wire rope draws the curtain vertically, and the curtain cascades and shrinks, so it is called 'tandem type'; The curtain is drawn into a variety of patterns such as butterfly, wave, petal shape and so on. (3) The second and third curtains are generally set at one-third of the depth and slightly behind the third curtain, and the three-door curtains are located at the depth of the two-thirds. They divide the performance area according to the needs of the performance to realize the change of scenes. The performance is uninterrupted from time to time, and when there are special needs, it can be used as the bottom curtain to render the atmosphere. It can be used for split movement, and can be lifted and lowered with the boom, with the function of lifting and splitting. (4) Horizontal and vertical bars Horizontal and vertical bars are the curtains on the sky and on both sides of the stage. They are mainly used to block the audience’s view of the sky and on both sides of the stage, making it invisible to the performance area and auxiliary spaces other than the scene screen. '. This design enhances the audience’s aesthetic and three-dimensional perception of the stage. If the occlusion is not good enough to be seen through by the audience, it is called a “piercing gang”. The position of the horizontal and vertical bars is generally determined according to the distance from the platform entrance to the side flyover, usually at a distance of 1.5-2 meters from the platform entrance. If there is a stage with lifting platform equipment, the first horizontal and vertical bar should be arranged at the front position of the first lifting platform. Strip the screen, and then determine the position of the next horizontal and vertical strip at a distance of 2.5-3 meters. The number of horizontal and vertical bars is determined according to the depth of the stage. Generally, there are 3-5 horizontal bars and 6-10 vertical bars in the theater where musicals are performed. The horizontal and vertical bars block the sight of the audience behind, and the horizontal and vertical bars far away from the stage block the sight of the backstage audience. The vertical bar is 2.5-3 meters wide, and the height is the height of the platform +0.5 meters. (5) The screen is used for background lighting in the performance. With red, yellow, green and blue lights, it can express lightning, storm, dream, memory and other forms, creating a sense of haziness and space-time distance for the audience to achieve the performance. Effect.　　 (6) Screen and screen guards Multifunctional theaters are generally equipped with moving screens, and other supporting products such as competition screens, screens, etc., to meet the requirements of ordinary movies, three-dimensional movies, wide screen movies, and block movies. The motion form of the screen has two types: integral lifting type and reel lifting type. The reel screen is a new type of special equipment for movie screening in multifunctional theater halls, auditoriums, and auditoriums. It is especially suitable for the height of the stage top (grid top) and small space. , The place where the screen frame cannot be lifted and the movie must be shown. According to the stage structure, the roll screen can be fixed on the side walls, front and back walls, grid roof, roof truss, etc. of the stage. The rolling screen is the whole rolling screen fixedly suspended under the truss of the theater. The geared motor drives the rolling screen frame to rotate, and the screen with various scenes moves horizontally, such as the Long March of the Red Army, rolling rivers, etc., with dynamic effects, driving the performance atmosphere. The scrolling screen has two forms of movement, horizontal and vertical.　　 (7) The bottom curtain of the conference is arranged in the back area of u200bu200bthe stage, about 2 meters away from the sky curtain, which is used to block the audience's sight to the back of the stage.　　 (8) The sky screen is used for slideshows to rear projections, to change the background, and to use lights to express mountains and rivers, lightning and thunder, storms, and quiet countryside, so that the audience can experience the magnificent plot.　　 The sky screen is fixedly placed or hung close to the back wall, and is divided into curved sky screens and flat sky screens according to the structural form. In order to expand the view of the sky screen, the left and right sides of the screen are made into an arc shape, which is a curved sky screen; the sky screen is tied to the sky screen frame as a flat sky screen.　　 TV theaters are generally equipped with two levels of canopy, the outermost level is a black canopy, and the inner level is equipped with a daylight curtain.