Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1992-09-01
1995-05-09
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345126, 395109, G09G 524
Patent
active
054144485
ABSTRACT:
An information processing system having a character/pattern generator, in which outline information of a character/pattern expressed in a vector form is subjected to any of at least two sorts of coordinate transformations in accordance with an address allocation scheme of an output engine to-be-used. Besides, in generating and transferring character/pattern data of dot form for each of the outline information items of character/pattern parts in subregions into which a region of the character/pattern has been divided, the outline information of the character/pattern is divided in either of horizontal and vertical directions in data transfer unit in accordance with the address allocation scheme of the output engine to-be-used. Further, in transferring the character/pattern data of the dot form, addresses are updated in conformity with any of at least two address update schemes in accordance with the address allocation scheme of the output engine to-be-used.
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Nagashima, Ichiro et al. "Design of an Outline Font Rasterizing LSI," IEEE 1989, Custom Integrated Circuits Conference 9-2, pp. 117-118.
Morgan, Marc et al. "An ASIC for Outline Character Generation," 1991, Society for Ingromation Display 11.7, pp. 201-204.
TC8511F (Font Graphics Accelerator), Toshiba Technical Materials for Integrated Circuits, 1989.
Hasegawa Kazuko
Kitazume Yoshiaki
Sato Tsuneo
Wada Hiroshi
Wakisaka Shinji
Hitachi , Ltd.
Hjerpe Richard
Lao Lun-Yi
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