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| Electrographic apparatus |
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| Recording and reproducing apparatus |
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Electronic blackboard apparatus
| Details |
Inventors: Miyamori, Nobuyuki; Tomofuji, Yoshiaki; Izawa, Kiyosato; Tsuchida, Youichi;
Assignee: Wacom Co., Ltd. (Saitama, JP)
Primary Examiner: Schreyer; Stafford D.
Assistant Examiner:
Attorney, Agent or Firm: Pollock, VandeSande & Priddy
An electronic blackboard apparatus comprises an electronic blackboard unit, a writing instrument, a position-detecting control unit, and an output section. When video information such as characters and figures is depicted on a writing surface by means of the writing instrument, a magnetic bias with a locus corresponding to the video information is simultaneously applied to a position-detecting tablet of the electronic blackboard unit. Position coordinates thereof are computed by the position-detecting control unit and converted into electric signals. Similarly, when the video information on the writing surface is erased by means of the eraser, a magnetic bias with a locus corresponding to the erased video informaton is simultaneously applied to the position-detecting tablet. Position coordinates thereof are calculated by the position-detecting control unit and converted into electric signals. On the basis of these electric signals, the video information on the writing surface is output from the output section as a hard-copy image or as a display image. |
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DETAILED DESCRIPTION Accordingly, a primary object of the present invention is to provide an electronic blackboard apparatus which is lightweight and outstanding in durability.
To this end, the present invention provides, in accordance with one aspect of the invention, an electronic blackboard apparatus, comprising: an electronic blackboard unit having a surface plate made of a non-magnetic material, the surface of which is formed as a writing surface capable of being used repeatedly and a position-detecting tablet for detecting position coordinates of a local magnetic bias applied via the surface plate; a writing instrument having a core member for displaying video information including characters and figure on the writing surface and a magnetism generator for applying a magnetic bias to the position-detecting tablet when the core member is in contact with the writing surface; an eraser having an erasing member for erasing the video information including the characters and figure on the writing surface and a magnetism generator for applying a magnetic bias to the position-detecting tablet when the erasing member is in contact with the writing surface; a position-detecting control unit for driving the position-detecting tablet and for computing the position coordinates of the writing instrument and the eraser; and an output section for outputting the video information of the writing surface.
In accordance with this aspect of the present invention, if the writing instrument is operated on the writing surface of the electronic blackboard unit, video information such as characters and figure is displayed on the writing surface by means of the core member of the writing instrument.
At the same time, a magnetic bias with a locus corresponding to the video information is applied to the position-detecting tablet.
Position coordinates thereof are calculated by the position-detecting control unit and converted into electric signals.
If the eraser is similarly operated, the video information on the writing surface is erased by the erasing member of the eraser
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