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Method and apparatus for scroll displaying an image on screen

  • US 5,745,098 A
  • Filed: 11/04/1996
  • Issued: 04/28/1998
  • Est. Priority Date: 11/26/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus scroll displaying an image on a screen during a scrolling operation, said apparatus comprising:

  • a memory section storing whole image information;

    a display displaying a partial image extracted from said whole image information of said memory section, said display comprising a display screen;

    a first region setting section setting a whole image region having first display coordinates (X, Y) for said whole image information in said memory section said whole image region moving as the coordinates (X, Y) are moved;

    a second region setting section setting a screen region having second display coordinates (x, y) for the display screen of said display;

    a conversion magnification setting section setting coordinates conversion magnifications (K1, K2) for converting the second display coordinates (x, y) in said screen region into the first coordinates (X, Y) in said whole image region;

    a pointer operating section moving a pointer on the display screen of said display during the scrolling operation;

    a pointer movement detecting section detecting coordinates values (x, y) of said second display coordinates of a present pointer position during the movement on the screen by said pointer operating section;

    a coordinates converting section coupled to the conversion magnification setting section and to the pointer operating section and converting the pointer coordinates values (x, y) after completion of movement detected by said pointer movement detecting section into coordinates values (X, Y) of the first display coordinates of the whole image region by using said coordinates conversion magnifications (K1, K2) causing the coordinates (X, Y) of said whole image region to move as the coordinates (x, y) of the pointer move;

    a third region setting section coupled to the coordinates converting section and setting a display region corresponding to said screen region into said whole image region by using the conversion coordinates values (X, Y) obtained by said coordinates converting section as a start point; and

    a display control section coupled to the display and to the second region setting section and controlling the scrolling operation by extracting the image of said display region set by said third region setting section from said whole image region and for allowing the image to be scroll displayed by said display.

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