专利名称：Electronic blackboard system发明人：Katsuyoshi Sakai申请号：US07/092427申请日：19870903公开号：US04803564A公开日：19890207
摘要：An electronic blackboard system is composed of: angle irons fixed to aninformation writing board or to a wall surface above the information writing board; aguide rail which is secured to the angle irons and extends horizontally; a driving unitplaced on the guide rail, the driving unit moving horizontally; a photoelectric conversiondevice for converting written information into electrical signals; a memory for storingimage information of one picture; a hard-copy device for recording the image
information; and a roller secured to the photoelectric conversion device, the roller rollingwhile in contact with the information writing board. In the thus constructed electronicblackboard system, it is possible to read information written on an existing informationwriting board which may even be attached to a wall.
申请人：MITSUBISHI DENKI KABUSHIKI KAISHA
代理机构：Wolf, Greenfield & Sacks
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