| 摘要 |
A color picture tube of the present invention comprises three in-line cathodes (1a, 1b, 1c) aligned in the horizontal direction, a first focussing electrode (4) supplied with a focus voltage, a second focussing electrode (5) supplied with a dynamic voltage that changes in accordance with a deflection angle of the electron beams, a final accelerating electrode (7) supplied with an anode voltage, an intermediate auxiliary electrode (6) arranged between the second focussing electrode (5) and the final accelerating electrode (7). The intermediate auxiliary electrode (6) is supplied with a voltage between the voltage of the second focussing electrode (5) and the anode voltage. A non-axisymmetric electrostatic lens for focussing electron beams in the horizontal direction and diverging them in the vertical direction is formed between the first and second focussing electrodes (5, 6). The power of the non-axisymmetric electrostatic lens changes in accordance with a deflection angle of the electron beam. <IMAGE> |
