| 摘要 |
PROBLEM TO BE SOLVED: To improve picture quality of a color cathode-ray tube by using electronic beams in which the diameter of spot in horizontal and vertical directions does not become large locally respectively and the diameter of spot in horizontal direction is smaller than that of the conventional electronic beams on the phosphor screen. SOLUTION: The structure of the color cathode-ray tube device includes a bulb, a phosphor screen, an electronic gun, and a deflector, and a focus electrode 13, a first field correction electrode 15, an anode electrode 14, and a second field correction electrode 16 form an electronic lens in which, by the impression of a focusing voltage on the focus electrode 13 and the first field correction electrode 15, and by the impression of an anode voltage higher than the focusing voltage on the anode electrode 14 and the second field correction electrode 16, the focusing force in vertical direction perpendicular to the horizontal direction is stronger than the focusing force in horizontal direction inside the focus electrode 13, and the dispersing force in the vertical direction is stronger than the dispersing force in the horizontal direction inside the anode electrode 14. COPYRIGHT: (C)2006,JPO&NCIPI
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