| 摘要 |
<p>PURPOSE:To increase the easiness to use an electronic blackboard and improve conference efficiency by providing an indicating means for erasure protection and a memory, and copying the contents of a memory for display in said memory and protecting them. CONSTITUTION:The system which uses the electronic blackboard consists of a white board 1 having a digitizer, a felt pen 3a for drawing, an eraser 3b for erasure, a display device 2, a picture element memory 4 stored with its display contents, a printer 5, a storage unit 7, its protection key 9a, and a picture element memory 10 for erasure protection. In this case, a console panel 9 is provided with an erasure protection key 9a and a picture element memory 10 for erasure protection, in which the contents of said memory 4 are copied by said control part 8. Then, an OR part 11 ORs outputs of said memories 4 and 10 and outputs the result to the display device 2, etc. Consequently, a necessary part drawn on the electronic blackboard is protected from erasure operation.</p> |
