发明名称 |
Electronic whiteboard apparatus |
摘要 |
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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申请公布号 |
US5903252(A) |
申请公布日期 |
1999.05.11 |
申请号 |
US19970942303 |
申请日期 |
1997.10.01 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
OGATA, TAKEFUSA |
分类号 |
B43L1/04;H04N1/12;H04N1/193;(IPC1-7):G08C21/00;G09G3/38;G09G5/00 |
主分类号 |
B43L1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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