| 摘要 |
In an inline three-beam system color cathode-ray tube, there is provided an inline three-beam system color cathode-ray tube electron gun in which beam spot shapes of three electron beams on the left and right end portions of a fluorescent screen may be uniformed as much as possible and focusing voltages may be adjusted with ease and also deteriorations of beam spot shapes of three electron beams on the left and right end portions of the fluorescent screen may be alleviated and a satisfactory convergence characteristic may be obtained on the whole region of the screen.A color cathode-ray tube electron gun includes trisected focusing electrodes. Of the trisected focusing electrodes, a voltage of a waveform similar to a sawtooth synchronized with the horizontal scanning is applied to a central focusing electrode thereof, a housed resistor is connected to the central focusing electrode and two outside focusing electrodes and a voltage which results from passing the voltage Ef3 of the waveform similar to the sawtooth through the housed resistor is applied to the two outside focusing electrodes. A color cathode-ray tube electron gun includes trisected cathodes comprising a uni-potential lens and in which a voltage of a waveform synchronized with-a horizontal direction deflection and a vertical direction deflection is applied to the center electrode of the trisected electrodes.
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