Interactive type projection screen

Abstract

The invention is suitable for the technical field of projection, and discloses an interactive type projection screen which comprises a hollow spool, a projection screen assembly, a first rotating shaft and a second rotating shaft, wherein the first rotating shaft and the second rotating shaft are arranged in the hollow spool, wherein the projection screen assembly comprises projection screen cloth for bearing video and an electromagnetic induction layer for induction locating, the electromagnetic induction layer and the projection screen cloth are respectively wound on the first rotating shaft and the rotating shaft and are arranged in a parallel and laminated manner after extension, the top end of the projection screen cloth is connected with the first rotating shaft, the bottom end of the projection screen cloth is connected with a hanger rod for straightening the projection screen cloth, the top end of the electromagnetic induction layer is connected with the second rotating shaft, and the bottom end of the electromagnetic induction layer is connected with an electric control assembly to be fixedly arranged in a hollow holding tube. According to the invention, physical connection does not exist in the winding and unwinding process of the projection screen cloth and the electromagnetic induction layer, so that the phenomenon that the smoothness of the projection screen cloth and the smoothness of the electromagnetic induction layer are influenced mutually in the unwinding process is avoided, and the projection effect of the projection screen cloth is guaranteed; and at the same time, because the projection screen cloth and the electromagnetic induction layer are two independent layers, the processing and the maintenance are more convenient.

Description

technical field [0001] The invention belongs to the technical field of projection, in particular to an interactive projection screen. Background technique [0002] With the development of society, projection technology has been widely used in multimedia education systems and office conference systems. The projection systems in general multimedia education systems and office conference systems can be roughly divided into two types: one is the projection screen system, and the other is the projection screen system. It includes a computer, a projector and a projection screen; another electronic whiteboard system includes a computer, a projector and an electronic whiteboard. The projection screen in the former is cheap, has good projection effect, and is small in size, light in weight, easy to install and transport, so it is welcomed by users, but compared with the latter, it lacks interactive functions, so the classroom or meeting is not vivid, and it is not easy to attract stu...

AI Technical Summary

Problems solved by technology

However, on the one hand, due to the thickness of both the projection screen and the positioning sensing layer, during the winding process, the total winding speed of the outer layer is faster than that of the inner layer due to the large radius, causing the projection screen and the sensing layer to pull each other, which will cause The surface of the projection screen is uneven or the induction layer is uneven, and the projection screen and the induction layer are tightly wrapped together in the rolled-up state. The unevenness of the projection screen and the unevenness of the induction layer will affect each other, thus affecting The projection effect of the projection screen; on the other hand, because the projection screen and the induction layer are glued together, it brings great inconvenience to production, processing and after-sales maintenance.

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