×

Graphic display scrolling apparatus

  • US 5,754,161 A
  • Filed: 07/14/1995
  • Issued: 05/19/1998
  • Est. Priority Date: 01/30/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A graphic scrolling apparatus, comprising:

  • means for storing image data;

    an image display device having a screen for displaying a first predetermined-sized area of the image data stored in the image data storing means;

    a buffer memory for temporarily storing a second predetermined-sized area of the image data stored in the image data storing means, the second predetermined-sized area being larger than the first predetermined-sized area;

    a first depicting means for retrieving, from the image storing means, at least image data corresponding to one of a plurality of third areas of the first predetermined-sized area, which protrudes from the second predetermined-sized area and for depicting the at least image data corresponding to one of the plurality of third areas correspondingly in a respective fourth area of the second predetermined-sized area, which is outside of the first predetermined-sized area as the first predetermined-sized area scrolls on the second predetermined-sized area; and

    image display controlling means for controlling the apparatus such that an image is displayed on the screen of the image display device by changing a reading address for the buffer memory to an address of the fourth area and by reading out data of the first predetermined-sized area based on the changed address at the boundary of the first predetermined-sized area when the first predetermined-sized area protrudes from the second predetermined-sized area as the first predetermined-sized area scrolls on the second predetermined-sized area.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×