Hitachi, Ltd.

Yuji Taki

Kimiya Yamaashi

Atsushi Kawabata

Shuuichi Miura

Shinya Tanifuji

Yoshiki Kobayashi

A plurality of letter output devices (workstations, printers) are connected to a letter data control device by a transmission path. The control device stores letter data for transmission to the letter output devices, and is able to convert that letter data to a desired layout (e.g. from a vector font to a dot font) and then transmits the converted letter data to one or more of the letter output devices. The control device is able to select part of its stored letter data for transmission so that only commonly used letter data need be transmitted during start up of the system. Since a large amount of letter data may be stored in the control device, and only part may be transmitted to the letter output devices, those output devices can have a relatively small memory.

System for centrally controlling letter data

A graphic processing device is composed of a main storage device, a drawing control device and a drawing device. The main storage device stores data relative to the coordinates of plural graphics. The drawing control device reads out the data relative to the coordinates of the plural graphics stored in the main storage device, scans the coordinate data to calculate the coordinates of intersecting points of a scanning line and the plural graphics for each position of the scanning line. The drawing control device also determines an overlapping area (AND area) or a common area (OR area) of the plural graphics on the basis of the coordinates of the intersecting points of the plural graphics and the scanning line. The drawing device draws the overlapping area (AND area) and the common area (OR area) of the plural graphics as a graphic.

Growing community of inventors

Takasaki, Japan

Yuji Taki