Graphic display scrolling apparatus
First Claim
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.
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Accused Products
Abstract
A graphic scrolling apparatus comprising a unit 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 unit; 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 unit for retrieving, from the image storing means, at least image data corresponding to a third area of the first predetermined-sized area, which protrudes from the second predetermined-sized area and for depicting the at least image data corresponding to the third area on a fourth area of the second predetermined sized area, which is in the outside of the first predetermined-sized area as the first predetermined-sized area scrolls on the second predetermined-sized area; and an image display controlling unit 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.
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Citations
6 Claims
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1. A graphic scrolling apparatus, comprising:
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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 Dependent Claims (2, 3, 4, 5)
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6. A graphic scrolling apparatus, comprising:
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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 and divided into a plurality of sub-areas each of which is the same size as the first predetermined-sized area; and depicting means for performing a depiction operation of regions on to corresponding sub-areas of the second predetermined-sized area, wherein each region is provided in a different sub-area of the second predetermined-sized area; and wherein each region is provided in a sub-area different from the sub-area which provides the majority of image data to be displayed in the first predetermined-size area.
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Specification