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Screen and production display apparatus using the same

  • US 6,392,726 B2
  • Filed: 10/01/1997
  • Issued: 05/21/2002
  • Est. Priority Date: 03/16/1994
  • Status: Expired due to Fees
First Claim
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1. A generally flat screen for receiving an image-forming light projected by a projector so as to provide an observable display to a viewer, comprising:

  • a gain controller for changing a ratio (gain) of luminance at a light-output face of the screen to illuminance at a light-incident face of the screen so that a gain of generally the entire screen is changed, thereby changing an observable area of the screen, said gain controller controlling the gain by controlling the degree of diffusion of light;

    said gain controller controlling the gain within a continuous range, and the observable area is obtained by an arbitrary gain within said continuous range.

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