| 摘要 |
<p>PURPOSE:To identifyingly display picture data and temporary position displaying data by identifying the presence or absence of the generation of a wireless signal for the usage of writing utensils and an indicating stick with an electronic blackboard to use a tablet to detect a position coordinate, to which a magnetic bias is added. CONSTITUTION:A tablet 12 detects the coordinate value of a position, to which the constant magnetic bias is added, by a position detecting circuit 5. The wireless signal is detected by selectively using a magnetic generator to generate the constant magnetic bias, the writing utensils, which equips a signal generating means to generate the wireless signal by switch operation only in case of contacting to a writing surface 15, and the indicating stick to equip only the magnetic generator which generates the constant magnetic bias. Then, when the identifying signal of the writing utensils is obtained, a processing is executed as data to correspond to an image and a dot-display is executed for example. On the other hand, when the identifying signal of the writing utensils is not obtained, the processing is executed as the temporary position displaying data and a cursor-display is executed for example.</p> |
