| 摘要 |
A color-cathode-ray-tube electron gun of the present invention comprises a three-divided first focus electrode and a second focus electrode set so as to oppose the first focus electrode: wherein a parabolic-waveform voltage synchronizing with horizontal scanning is applied to the second focus electrode; of the three-divided focus electrodes, a built-in resistor electrically connecting the central electrode and the both outside electrodes is provided; a voltage on which a first voltage component having a waveform similar to serration and synchronizing with horizontal scanning, and a second voltage component having a parabolic waveform convex in the direction opposite to the parabolic waveform and synchronizing with horizontal scanning are superimposed is applied to the central electrode, and a voltage obtained by passing the voltage on which the first voltage component and second voltage component are superimposed through the built-in resistor is applied to the both outside electrodes. According to the present invention it is possible to reduce influences due to crosstalk between electrodes and uniform spot shapes of three electron beams at the right and left ends of a fluorescent screen as much as possible.
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