公开(公告)号：US3754158A

公开(公告)日：1973-08-21

申请号：US3754158D

申请日：1971-12-28

Applicant: MATSUSHITA ELECTRONICS CORP

Inventor： NAKAGAWA Y ,  KONOSU O ,  KAJI Y ,  SUZUKI H

IPC: B41J2/435 ,  G06K15/12 ,  G09G1/22 ,  H01J29/41 ,  H01J29/46 ,  H01J31/08 ,  H01J31/16 ,  H01J31/48

CPC classification number: H01J29/41 ,  H01J29/46 ,  H01J31/16

Abstract: In a character generating device in which character signals are generated by scanning a character plate having character slits therein, with an electron beam, a signal developed across a load connected with an electrode provided in front of the character plate with respect to the travel of the beam by collecting with said electrode the secondary electrons emitted from a portion of the surface of said character plate other than said character slits when said beam hits against that portion and a signal developed across a load connected with a collector electrode provided in rear of the character plate with respect to the travel of the electron beam by collecting with the character plate the secondary electrons emitted from the collector electrode when the beam passes through the character slits of the character plate and impinges on the collector electrode, have the same polarity and both the signals are added through respective coupling capacitors to produce a composite signal. The composite signal is opposite in polarity to the signal developed across the load connected with the character plate. Accordingly, if the composite signal and the signal across the load connected with the character plate are differentially combined and thereafter applied to an external circuit, then an output representing any character signal can be increased in magnitude. Consequently, since a high level output signal is obtained without increasing the electron beam current according to the proposed device, the resolution or character generating capacity is improved. If the resolution need not be so high, the accelerating voltage can be accordingly reduced.

Abstract translation: 在通过用电子束扫描其中具有字符狭缝的字符板来生成字符信号的字符产生装置中，在与字符板前面设置的电极相关的负载上产生的信号相对于 当所述光束撞击该部分时，与所述电极一起收集从所述字符板的表面以外的部分发射的二次电子，并且在与设置在字符后面的集电极连接的负载上产生信号 通过与字符板一起收集电子束的行进，当光束通过字符板的字符狭缝并撞击在集电极上时，从集电极发射的二次电子具有相同的极性，并且两者均为 信号通过相应的耦合电容器添加以产生复合信号。 复合信号的极性与在与字符板连接的负载上产生的信号相反。 因此，如果复合信号和与字符板连接的负载两端的信号差分组合，然后施加到外部电路，则可以大幅度增加表示任何字符信号的输出。 因此，根据所提出的装置，由于不增加电子束电流而获得高电平输出信号，因此提高了分辨率或字符发生能力。 如果分辨率不需要太高，则可以相应地减小加速电压。