| 摘要 |
PURPOSE:To attain cost-down in comparison with an electronic blackboard by fitting only a rail to a blackboard (or white board) in advance when plural blcakboards (or white boards) exist and are not used at the same time and using the device on the rail only when the board is desired to be used. CONSTITUTION:This device is fitted to the blackboard by being suspended to the rail 217. A wheel 203 is used to attain this operation, and this device is moved to the left or right on the blackboard along the rail 217. A photoelecTric converter 211 being an essential part of this invention is fitted in parallel with the blackboard, a pattern on the blackboard under the photoelectric converter is converted into an electric signal through photoelectric conversion and the result is applied to a control circuit 210. The control circuit 210 forms a copy of an image on the blackboard in terms of a digital value into a memory in the control circuit 210 based on the moving amount information from a movement detector 209 detecting the horizontal movement of this device on the blackboard. |
