Electronic whiteboard apparatus
First Claim
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1. An electronic whiteboard apparatus comprising:
- a long drawing sheet;
a frame having an opening through which a portion of said drawing sheet is exposed;
a main roller provided in said frame for moving said drawing sheet;
first and second auxiliary rollers disposed in said frame so as to be opposed to said main roller in a horizontal direction with respect to said opening;
a third roller disposed between said main roller and said first and second auxiliary rollers;
a drive unit for rotating said main roller;
a read unit for reading information drawn on said drawing sheet; and
an output unit for outputting the information transmitted from said read unit;
wherein said main roller has a larger diameter than said first, second and third auxiliary rollers, said drawing sheet is extended on said main roller and said first, second and third auxiliary rollers so as to be folded back once by means of said third auxiliary roller, said drive unit rotates said main roller in such a manner that the portion of said drawing sheet exposed through said opening is moved toward said main roller, and said read unit performs reading with the movement of said drawing sheet caused by rotation of said main roller.
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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.
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2 Claims
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1. An electronic whiteboard apparatus comprising:
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a long drawing sheet; a frame having an opening through which a portion of said drawing sheet is exposed; a main roller provided in said frame for moving said drawing sheet; first and second auxiliary rollers disposed in said frame so as to be opposed to said main roller in a horizontal direction with respect to said opening; a third roller disposed between said main roller and said first and second auxiliary rollers; a drive unit for rotating said main roller; a read unit for reading information drawn on said drawing sheet; and an output unit for outputting the information transmitted from said read unit; wherein said main roller has a larger diameter than said first, second and third auxiliary rollers, said drawing sheet is extended on said main roller and said first, second and third auxiliary rollers so as to be folded back once by means of said third auxiliary roller, said drive unit rotates said main roller in such a manner that the portion of said drawing sheet exposed through said opening is moved toward said main roller, and said read unit performs reading with the movement of said drawing sheet caused by rotation of said main roller. - View Dependent Claims (2)
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Specification