| 摘要 |
PROBLEM TO BE SOLVED: To read and record writing data written with an aqueous marker without using any special electronic pen, optical sensor, etc., for a whiteboard.SOLUTION: The present invention relates to a whiteboard having: a substrate; first wiring having a plurality of thin parallel wires provided on one surface of the substrate; second wiring having a plurality of thin parallel wires provided on the other surface of the substrate and crossing the first wiring; a driving circuit capable of applying a voltage for detection to the plurality of thin wires of the first wiring by sequential switching; a detection circuit scanning the plurality of thin wires of the second wiring by sequential switching; a writing information recording device which records position data output from the detection circuit; and a writing sheet bonded on the one or the other surface of the substrate with a high-dielectric-constant adhesive.SELECTED DRAWING: Figure 1 |
