公开(公告)号：US3730991A

公开(公告)日：1973-05-01

申请号：US3730991D

申请日：1971-01-22

Applicant: RCA CORP

Inventor： FINCHER SANFORD R

IPC: G01D15/14 ,  G01R13/22 ,  H04N1/40 ,  H01J29/52 ,  H04N1/22

CPC classification number: H04N1/4005 ,  G01D15/14 ,  G01R13/22 ,  H04N1/40025

Abstract: The electron gun of a kinescope is operated at a negative high voltage so as to permit its thin faceplate to be grounded to reduce the possibility of ''''punch-through'''' while still maintaining reasonable spot size. Signals to be displayed are direct current coupled to the cathode of the electron gun through a first power supply of substantially the same magnitude as a second power supply providing the high voltage potential to the control grid. The use of a thin faceplate kinescope enables increases in light efficiency for recording on electrophotographic paper while the use of the direct current coupling provides an average brightness level which is substantially independent of the instantaneous value of applied signal amplitude.

Abstract translation: 显像管的电子枪工作在负高电压，以便允许其薄面板接地，以减少“穿孔”的可能性，同时仍然保持合理的光斑尺寸。 要显示的信号是通过与向控制网格提供高电压电位的与第二电源基本相同的幅度的第一电源而与电子枪的阴极耦合的直流电。 使用薄面板显象管可以提高在电子照相纸上记录的光效率，而使用直流耦合提供基本上与施加的信号幅度的瞬时值无关的平均亮度水平。