| 摘要 |
A cathode structure is described that can display a picture more rapidly and make a green color radiated before a white balance. The cathode structure includes sleaves 4, 5 and 6 each including a heater, a gas metal 7, 8 and 9 attached to the upper parts of the sleaves 4, 5 and 6, and material which emits a thermal electron and covered on the gas metal 7, 8 and 9. A round-type gas metal 10 is attached to a G cathode 2 and cap-type gas metal 16 is attached to R and B cathodes 1 and 3. The round-type gas metal 10 can be attached to the R and B cathodes 1 and 3 and the cap-type gas metal 16 to the G cathode 2. The round-type gas metal 10 can be attached to the G, R and B cathodes, and the G cathode 2 has a thinest thickness of the G, R and B cathodes, and has a longer sleave length than the R and B cathodes. Thereby, it is possible to display the picture of a green color and shorten the time for the display.
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