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Multi-window apparatus

  • US 5,977,946 A
  • Filed: 01/16/1997
  • Issued: 11/02/1999
  • Est. Priority Date: 12/16/1993
  • Status: Expired due to Term
First Claim
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1. An image data conversion apparatus which receives an image data digital signal output from a video memory having a plurality of storage areas where a plurality of image data are respectively stored, and also receives an image attribute signal output from an attribute storage means where information on whether expansion of a luminance range is required or not is stored as an image attribute corresponding to each of said storage areas, said image attribute signal providing an instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is required, or providing no instruction to expand the luminance range when said image attribute indicates that the expansion of the luminance range is not required,said image data conversion apparatus then generating a display data analog signal which allows a display unit to display an image, and thereafter outputting the thus generated signal to the display unit,wherein a luminance value represented by said display data analog signal is increased only when the received image attribute signal provides the instruction to expand the luminance range.

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