Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1995-07-14
1998-05-19
Saras, Steven
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345121, 345341, G09G 534
Patent
active
057541612
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.
REFERENCES:
patent: 4611202 (1986-09-01), DiNitto et al.
patent: 5045845 (1991-09-01), Yamaoka et al.
patent: 5208588 (1993-05-01), Nishiyama
Hirano Koji
Ishimoto Akihiko
Noguchi Tadayuki
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Electric Semiconductor Software Co. Ltd.
Saras Steven
Wu Xu-Ming
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