Electronic whiteboard apparatus

Details Electronic whiteboard apparatus Electronic whiteboard apparatus

1997-10-01

1999-05-11

Shankar, Vijay

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345178, 178 1803, 178 1807, G08C21/00

Patent

active

059032529

ABSTRACT:
In a multi-plane electronic whiteboard apparatus, a drawing sheet is extended on a main roller and driven rollers so as to be folded back once by means of the intermediate driven roller. The main roller has a diameter larger than (at least not less than twice) the diameter of the driven rollers to ensure a space for forming the folded portion. A portion of the drawing sheet is exposed through an opening of a frame for serving as a drawing plane. The folded portion contributes to providing a total of four drawing planes. Therefore, it is possible to provide the multi-plane electronic whiteboard apparatus with a simple structure and at a low cost.

REFERENCES:
patent: Re35329 (1996-09-01), Murakami et al.
patent: 4857908 (1989-08-01), Kogure et al.
patent: 5023408 (1991-06-01), Murakami et al.
patent: 5134388 (1992-07-01), Murakami
patent: 5274362 (1993-12-01), Potvin

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