公开(公告)号：US3849773A

公开(公告)日：1974-11-19

申请号：US34010373

申请日：1973-03-12

申请人： MATSUSHITA ELECTRIC IND CO LTD

发明人： KATAHIRA T ,  IZUMI H ,  TOKONAMI M

IPC分类号： G09G5/22 ,  G09G5/24 ,  G06F3/14

CPC分类号： G09G5/24 ,  G09G5/222

摘要： Character codes of plural lines from an input-output circuit are entered into a refresh memory circulating at a clock frequency. One of these lines of character codes is then transferred to a shift register during a time period necessary for scanning a space between two adjacent lines. The shift register circulates at a rate higher by an integer number times the clock frequency and is equal to a horizontal scanning time of a standard television system. The integer number corresponds to the number of scanning lines existing in the space. A pattern generator is driven by the output signals of the shift register to convert such signals into video signals which produce one line of a character pattern on the cathode ray tube of the standard television system.

摘要翻译： 来自输入 - 输出电路的多行的字符代码被输入到以时钟频率循环的刷新存储器。 这些字符代码行之一然后在扫描两条相邻行之间的空间所需的时间段内传送到移位寄存器。 移位寄存器以高于时钟频率的整数倍的速率循环，并且等于标准电视系统的水平扫描时间。 整数对应于空间中存在的扫描线数。 模式发生器由移位寄存器的输出信号驱动，将这些信号转换成在标准电视系统的阴极射线管上产生一行字符图形的视频信号。