A folding convertible screen/display made from rigid, structural material, comprising a floor and three walls, positionable and free-standing on a support surface without formal assembly at the point of usage, is disclosed. An optional continuous top provides additional structural integrity and definition...http://www.google.com.tw/patents/US6237668?utm_source=gb-gplus-share專利 US6237668 - Folding convertible screen/display
