Inflatable frame projection screen - has double walled screen with evacuated space giving concave shape to screen surface

摘要

The outer support frame for the screen has a hollow section shape which is inflated via a first control valve (5) to form a rigid structure. The frame is fitted with double walls (1,2) of flexible material to form the screen, with the space between the walls evacuated to hold the screens in a concave shape for close proximity projection. The whole screen folds into a compact package and is erected using simple manual pumps. One of the flexible walls is coated for projection while the other is a backing wall. The frame forms a rectangular shape screen and can have extended front lips to form a hood over the screen.