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    • 82. 发明专利
    • Electronic blackboard system
    • 电子黑板系统
    • JPS6135670A
    • 1986-02-20
    • JP15846284
    • 1984-07-27
    • Sharp Corp
    • YAMASATO HISAO
    • H04N1/00B43L1/04B43L15/00
    • PURPOSE: To simplify the constitution of an optical system of an optical read means by allowing a transmission system optical read means to make an image sensor (e.g., CCD) read character/graphic information drawn on a writing medium at, e.g., winding of the writing medium.
      CONSTITUTION: A character/graphic form is drawn on a transparent writing medium P and a winding means 3 is operated to wind the writing medium P on a reel 1'. The character/graphic form on the medium P is transmitted directly by the light of a fluorescent lamp 14 and read to the image sensor (e.g., CCD) through a condenser lens 16. The read signal is inputted to an A/D converter 10 via an amplifier 9 and converted into a digital signal. The digital signal is stored temporarily in a storage means 11 by using a signal in synchronization with the winding speed of the medium P as a write synchronizing signal W. The signal synchronizing with the recording speed of a recording means 12 is read as a synchronizing signal R, the storage content of the means 11 is read and inputted to the means 12 and the character/graphic form is recorded on a specified paper sheet S.
      COPYRIGHT: (C)1986,JPO&Japio
    • 目的:为了简化光学读取装置的光学系统的结构,允许传输系统光学读取装置使图像传感器(例如CCD)读取在例如卷绕的书写介质上绘制的字符/图形信息 写作媒介。 构成:在透明书写介质P上绘制字符/图形,并且操作卷绕装置3以将书写介质P卷绕在卷轴1'上。 介质P上的字符/图形直接通过荧光灯14的光传输,并通过聚光透镜16读取到图像传感器(例如CCD)。读取信号经A / D转换器10经由 放大器9并转换成数字信号。 通过使用与介质P的卷绕速度同步的信号作为写同步信号W将数字信号临时存储在存储装置11中。与记录装置12的记录速度同步的信号被读取为同步信号 R,装置11的存储内容被读取并输入到装置12,并且字符/图形被记录在指定的纸张S上。