Method for manufacturing color selection electrode structure and color cathode ray tube having the color selection electrode structure

摘要

To provide a method for manufacturing a color selection electrode structure easily capable of measuring a tension amount of the color selection electrode in the process for manufacturing the color selection electrode structure and a color cathode ray tube using the color selection electrode structure. The color selection electrode 7 is stretched with tension applied in the direction of the shorter axis thereof, and welded and fixed onto the top face that is curved inwardly in the direction of the longer axis of the longer side members 8a. Thereafter, the weight 14 is placed on the color selection electrode 7 so as to allow the color selection electrode 7 to sag by the load due to the mass of the weight 14. The deflection amount of the color selection electrode 7 may be measured by using a laser displacement meter 15 and the measured sag amount of the measured color selection electrode 7 is converted into the tension amount by the correlation graph. Thus, even if shock is applied from the outside, a color cathode ray tube without defects of color misalignment can be obtained.