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Picture display apparatus

  • US 6,184,859 B1
  • Filed: 04/19/1996
  • Issued: 02/06/2001
  • Est. Priority Date: 04/21/1995
  • Status: Expired due to Term
First Claim
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1. A picture display apparatus, comprising:

  • display means having a display screen for displaying a picture;

    specifying means for specifying an optional area of an overall picture displayed on a display screen of said display means;

    magnified picture generating means for generating a magnified picture of the area specified by said specifying means;

    display control means for superimposing said magnified picture on said overall picture in such a manner that said magnified picture is superimposed on said overall picture and the portion of said overall picture overlapped below the magnified picture is rendered visible and displayed in a same color as and with a lower density than said overall picture on the display screen of the display;

    bi-level display control means for initially displaying a picture displayed on the display screen of said display means by bi-level representation; and

    convert-to-multi-level display control means for displaying in multi-level representation after end of display in bi-level representation.

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