Method and apparatus for scroll displaying an image on screen

Details Method and apparatus for scroll displaying an image on screen Method and apparatus for scroll displaying an image on screen

1996-11-04

1998-04-28

Saras, Steven

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345145, 345341, G09G 534

Patent

active

057450986

ABSTRACT:
At the time of a scrolling operation, the pointer coordinates (x, y) when moving the pointer on the display are detected and converted into the coordinates values (X, Y) of a whole image region on a memory by using coordinates conversion magnifications (K1, K2). An image in the display region corresponding to the screen region is extracted from the memory while using the conversion coordinates values (X, Y) as a start point (origin) and is displayed on a display. The extracting display by the coordinates conversion is repeated at a sampling period of the pointer which is moved. The extracted image is scroll displayed in association with the pointer movement.

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