Projector and projection screen assembly

专利名称：Projector and projection screen assembly发明人：Kazuki Kobayashi,Kikuo Takita申请号：US05/510819申请日：19740930公开号：US03951518A公开日：19760420

摘要：A box-shaped projection screen unit is attachable to an optical projector toconstitute a cover therefor. The screen unit comprises a translucent screen mounted inan opening formed through the side of the box opposite an open side of the box whichmates with the projector. A rectangular plate hinged to a vertical edge of the box has aninternal reflecting surface facing the screen, and is swingable from a storage positioncovering the screen outward to a projection position in which the plate forms an anglewith the screen. A triangular cover plate is hinged to the top edge of the box, and isswingable from a storage position between the rectangular plate and the screenoutward to a horizontal position in which another edge of the triangular plate engageswith the rectangular plate to hold the same in the projection position and preventincident light from above from reaching the screen. In operation, an image from theprojector is reflected from the reflecting surface of the rectangular plate and focussedonto the screen, and the image is viewed through the box from the open side thereof.

申请人：RICOH CO., LTD.

代理人：Frank J. Jordan

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