Scroll controller
First Claim
1. A scroll controller comprising:
- a storage device for storing image information;
a display device for displaying the image information stored in the storage device;
a position specifying device for specifying a coordinate position of the image information displayed on the display device;
a calculating device for calculating a difference between prefixed coordinates and the coordinate position specified by the position specifying device;
a scroll quantity setting device for setting a scroll acceleration on the basis of a calculation result of the calculating device;
a scroll control device for scrolling the image information at least on the basis of the acceleration set by the scroll quantity setting device; and
wherein between a starting point and an end of reference point, the acceleration is set in the vicinity of the starting point, and deceleration is set in the vicinity of the end or reference point.
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Accused Products
Abstract
There is provided a scroll controller which solves a problem that in scrolling an image at coordinates specified by a pen or the like to specific coordinates (e.g., the center), it is unable in a display such as a liquid crystal display having a slow display reaction speed to grasp the state of movement when a scroll quantity (scroll speed) per unit time is fast. The scroll controller calculates a difference between prefixed coordinates and the coordinate position specified by a position specifying device and on the basis of the calculation result, controls so that not only stepwise scroll quantities are obtained, but also scroll quantities in starting and ending of the scroll are different from that in the other time of the scroll.
60 Citations
10 Claims
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1. A scroll controller comprising:
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a storage device for storing image information;
a display device for displaying the image information stored in the storage device;
a position specifying device for specifying a coordinate position of the image information displayed on the display device;
a calculating device for calculating a difference between prefixed coordinates and the coordinate position specified by the position specifying device;
a scroll quantity setting device for setting a scroll acceleration on the basis of a calculation result of the calculating device;
a scroll control device for scrolling the image information at least on the basis of the acceleration set by the scroll quantity setting device; and
wherein between a starting point and an end of reference point, the acceleration is set in the vicinity of the starting point, and deceleration is set in the vicinity of the end or reference point. - View Dependent Claims (2, 3, 4)
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5. A scroll controller comprising:
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a storage device for storing image information;
a display device for displaying the image information stored in the storage device;
a position specifying device for specifying a coordinate position of image information displayed on the display device;
a calculating device for calculating a difference between prefixed coordinates and the coordinate position specified by the position specifying device;
a scrolling device for scrolling the image information at the specified coordinate position to a prefixed coordinate position utilizing an acceleration based at least on the calculation result of the calculating device, so that different accelerations are utilized for coordinate positions specified at different distances from the prefixed coordinates; and
a notifying device for notifying at a point in time when an image portion at the specified coordinate position is scrolled to the prefixed coordinate position by the scrolling device. - View Dependent Claims (6, 7)
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8. A method of scrolling comprising the steps of:
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providing a storage device for storing image information, displaying at least a portion of the image information on a display device;
specifying a coordinate position of a portion of the image information displayed on the display device;
calculating a different in location between a predetermined coordinate position and the specified coordinate position;
scrolling image information corresponding to the specified coordinate position to another position on the display device, and calculating speed of said scrolling based upon the difference in location determined in said calculating step; and
wherein between a starting point and an end or reference point the acceleration is set in the vicinity of the starting point and deceleration is set in the vicinity of the end or reference point. - View Dependent Claims (9)
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10. A scroll control system comprising:
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a storage device for storing an image;
a display for displaying only a portion of the image stored in said storage device;
a position specifying device for specifying a coordinate position of a first portion of the image pointed to on the display;
wherein said position specifying device points to the coordinate position on the display when it is desired to scroll the first portion of the image corresponding to said coordinate position to another location on the display;
a calculating device for calculating a difference between reference point coordinates on the display and the coordinate position of the first portion of the image pointed to by the position specifying device;
a scroll quantity setting device for setting a scroll acceleration value on the basis of a calculation result of the calculating device, so that the acceleration value is based upon a difference between said reference point coordinates and said coordinate position of the image pointed to by said position specifying device; and
a scroll control device for scrolling the first portion of the image corresponding to the coordinate position pointed to on the display to said another location on the display using the acceleration value set by the scroll quantity setting device.
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Specification