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82. 发明授权

US4386359A Line printer attachment 失效
标题翻译：行式打印机附件
公开(公告)号：US4386359A
公开(公告)日：1983-05-31
申请号：US336649
申请日：1982-01-04
申请人： John L. Regehr , Phillip C. Schloss
发明人： John L. Regehr , Phillip C. Schloss
IPC分类号： G06F3/12 , G06F3/153 , G06K15/00 , G01D9/00
CPC分类号： G06K15/00 , G06K2215/0091
摘要： A line printer attachment for converting a display screen copier printer to a line printer. The last or extra line of the display is used as the line print buffer. An initiate print signal is generated upon detecting that the last or extra line is to be scanned. The initiate print signal is used to blank or inhibit the serial video data from the display screen and to enable the printer. The serial video data is constantly sent to the printer attachment but is ignored until the printer is enabled. With the printer enabled, printing takes place using the line print buffer data which has been serialized as serial video data. The print buffer data remains unchanged during the entire printing of the line where the printing is done in series of horizontal lines to complete the printing of a line. At the end of each horizontal line of print a vertical screen retrace occurs and the display screen is swept where again the last or extra line is detected and another initiate print signal is generated. The next horizontal line of the series of horizontal lines for completing a line of print is printed and the operation repeats until an entire line of printing is completed.
摘要翻译：用于将显示屏复印机打印机转换成行式打印机的行式打印机附件。显示的最后一行或多行用作行打印缓冲区。在检测到最后或额外的行被扫描时，产生启动打印信号。启动打印信号用于空白或禁止来自显示屏幕的串行视频数据，并启用打印机。串行视频数据不断发送到打印机附件，但在打印机启用之前会被忽略。启用打印机后，使用已经串行化为串行视频数据的行打印缓冲区数据进行打印。打印缓冲区数据在打印完成的行的整个打印过程中保持不变，以完成打印一行。在每个水平线打印结束时，发生垂直屏幕回扫，并且显示屏幕被扫描，再次检测到最后或额外的行，并且产生另一个启动打印信号。打印用于完成打印行的一系列水平行的下一个水平线，并重复该操作，直到整个打印行完成。

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