Hitachi, Ltd.

Tetsuo Iwamoto

Akira Nakajima

Masanori Ogino

Yasumasa Matsuda

Sayuri Oshima

Hideyuki Fuma

Kousyu Ichikawa

Keiichiro Tanaka

A large screen display comprising an image signal source such as a computer, an original image generator, a light-transmission screen, an on-screen pointing-position detecting means, and a light-pen built in an infra-red-ray emitting modulating means, wherein infra-red rays which are modulated by pressing force generated when the light-pen is pressed against the screen by an operator are emitted and the infrared rays are detected and amplified by an infrared-ray detector and demodulated by a demodulating means and then inputted to the image signal source, so that the tone and thickness of each stroke of a figure to be drawn and displayed can be displayed.

Input interface apparatus for large screen display

A method for drawing a composite figure by combining a plurality of figures. The contours of the plurality of figures are first drawn, and thereafter the insides of the contours are successively filled with in accordance with plane filling attributes of the corresponding figures. Thus, a composite figure with unnecessary contours made to disappear at superposed portions of the figures can be obtained.

Method for and apparatus for synthesizing and filling in figures having

Growing community of inventors

Tokorozawa, Japan

Tetsuo Iwamoto