| 摘要 |
PURPOSE: An electronic blackboard is provided to store information of an electronic blackboard in real time, to print and edit the information using a PC by providing a wireless transmission device to the electronic blackboard, and by installing a wireless transmission device which receives a wireless signal of the wireless transmission device. CONSTITUTION: A wireless transmission device(200) includes a wireless transmission control unit(201), a demodulation(202) and a transmission unit(203). The wireless transmission control unit(201) controls so that information of a memory(120) which scans and stores contents of a screen under the control of an electronic blackboard control unit(100) can be transmitted in wireless. The modulation unit(202) modulates screen information read from the memory(120) in order to transmit the information. The transmission unit(203) transmits a modulation signal of the modulation unit(202). The wireless reception device(300) includes a reception unit(301), a demodulation unit(302), a PC interface unit(303) and a RS232C connector(304). The reception unit(301) receives a wireless transmission signal of the wireless transmission unit(200). The demodulation unit(302) demodulates the signal received from the wireless reception unit(301). The PC interface unit(303) interfaces the signal demodulated. The RS232C connector(304) connects the PC interface unit(303) to a PC.
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