Scroll controller

一种滚动控制器，它解决了在将用笔等指定坐标处的图像滚动到特定坐标时，当每单位时间的滚动量(滚动速率)较快，在例如具有较低反应速率的液晶显示器上的显示不能够跟上移动状态这样一个问题。该滚动控制器计算预先指定坐标和由位置指定装置所指定的坐标位置之间的差并且根据该计算结果进行控制从而不仅得到逐步滚动量而且还得到与滚动的其他时间的滚动量不同的开始和末端滚动量。 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.