| 摘要 |
A COLOR CATHODE-RAY TUBE INCLUDING A MAIN LENS SECTION COMPRISING AN ANODE (5) TO WHICH AN ANODE VOLTAGE IS APPLIED, AND A FOCUS ELECTRODE. THE FOCUS ELECTRODE HAS FIRST TYPE OF FOCUS ELECTRODE GROUP (43) TO WHICH A FIRST FOCUS VOLTAGE IS APPLIED, AND A SECOND TYPE OF FOCUS ELECTRODE GROUP (44) TO WHICH A SECOND FOCUS VOLTAGE IS APPLIED WHICH IS OBTAINED BY SUPERPOSING ON A PREDETERMINED VOLTAGE A VOLTAGE THAT CHANGES DEPENDING UPON THE DEFLECTING AMOUNT OF THE ELECTRON BEAMS. BETWEEN THE FIRST TYPE OF FOCUS ELECTRODE GROUP (43) AND THE SECOND TYPE OF FOCUS ELECTRODE GROUP (44) ARE FORMED IN A DYNAMIC LENS AND AN ELECTROSTATIC QUADRUPOLE LENS. THREE ELECTRON BEAM PASSAGE HOLES ARE FORMED IN THE ELECTRODES THAT FORM THE DYNAMIC LENS AND THE CENTERS FOR THE OUTER ELECTRON BEAM PASSAGE HOLES IN THE FIRST TYPE OF FOCUS ELECTRODE GROUP (43) ARE DEVIATED RELATIVE TO THE CENTERS OF THE OUTER ELECTRON BEAM PASSAGE HOLES IN THE SECOND TYPE OF FOCUS ELECTRODE GROUP (44) IN THE HORIZONTAL DIRECTION. THE ELECTROSTATIC QUADRUPOLE LENS EHHIBITS DIFFERENT INTENSITIES FOR THE OUTER ELECTRON BEAMS RELATIVE TO THE CENTER ELECTRON BEAM.FIG. 1
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