| 摘要 |
The cathode structure including an approximately can-shaped case coupled to a control electrode, an insulator formed of three holders arranged in an in-line type and inserted to be supported by the case, and a sleeve inserted to be supported by the holder of which one end is provided with a base metal coated with an electron emission material for receiving a heater further has a thermal insulation material member installed in the insulator for partitioning the respective holders, thereby improving a cutoff emission characteristic, and an initial characteristic of a CRT by allowing the emission current to be identically supplied to respective heaters.
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