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1. 发明授权

US4247853A Alphanumeric CRT display system with means for storing positional data calculated during an initial scan 失效
标题翻译：字母数字CRT显示系统，具有用于存储在初始扫描期间计算的位置数据的装置
公开(公告)号：US4247853A
公开(公告)日：1981-01-27
申请号：US47435
申请日：1979-06-11
申请人： Douglas A. Hamilton , Paul R. Herrold
发明人： Douglas A. Hamilton , Paul R. Herrold
IPC分类号： G06F17/24 , G09G1/00 , G09G1/04 , G09G1/08 , G09G1/14 , G09G1/18 , G09G5/24 , G06F3/153
CPC分类号： G06F17/247 , G09G1/00
摘要： A cathode ray tube display system is provided for displaying alphanumeric characters which are cyclically refreshed in the sequence of selected positions. The system has conventional means for moving the CRT beam through an arbitrary sequence of selected positions with reference to first and second coordinate axes, in response to position signals, and character defining means for deflecting the beam at each selected position within which a selected character may be defined and in response to signal representations of said selected character for modulating the beam intensity along said pattern to define the character.The system further includes storage means for sequentially storing a coded representation of the character selected to be displayed as well as tab codes and carriage return codes for said displayed characters.In addition, the means for generating said position signals include: (1) means responsive to an access tab code for calculating the tab position for the next character to be displayed with respect to the first coordinate axes only in the initial cycle during which each of the selected characters is formed, (2) means for storing each of these calculated tab positions, and (3) means operable only during refresh cycle responsive to a tab code for accessing the stored previously calculated tab position corresponding to said code.
摘要翻译：提供阴极射线管显示系统，用于显示以所选位置的顺序循环刷新的字母数字字符。该系统具有常规方法，用于响应于位置信号，参考第一和第二坐标轴将CRT光束移动通过任选的选定位置序列，以及字符定义装置，用于在所选位置偏转所选位置，被定义并且响应于所述选定字符的信号表示，用于调制沿所述图案的光束强度以定义字符。该系统还包括存储装置，用于顺序地存储所选择的要显示的字符的编码表示以及用于所述显示的字符的标签代码和回车代码。此外，用于产生所述位置信号的装置包括：（1）响应于访问标签代码的装置，仅在初始周期中的初始周期中计算用于相对于第一坐标轴显示的下一个字符的制表位置，所选择的字符被形成，（2）用于存储这些计算的标签位置中的每一个的装置，以及（3）仅在响应于用于访问与所述代码相对应的所存储的先前计算的标签位置的标签代码的刷新周期期间可操作的装置。

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