Patent ID: 6739927
Filing Date: 2004-05-25
Classification: H01J

Abstract:
A method of assembling a color cathode ray tube having a panel provided with a plurality of panel pins protruding from an inner surface of the panel, a plurality of supporting members provided with engaging holes respectively at first ends, and a color selection electrode frame attached with a color selection electrode, wherein second ends of the supporting members are fixed by welding respectively to the color selection electrode frame, and the engaging holes are engaged respectively with the panel pins, the method comprising:holding the panel and measuring the position of the inner surface of the panel; hold ing the color selection electrode frame and measuring the position of the main surface of the color selection electrode attached to the color selection electrode frame; obtaining a measured value corresponding to a spacing between the panel inner surface and the main surface of the color selection electrode on the basis of data of the measured positions; engaging the engaging holes of the supporting members with dummy pins arranged to have a predetermined positional relationship with regard to the positions of the panel pins in the state that the panel is held for the measurement; adjusting the position of the main surface of the color selection electrode with regard to the engaging holes on the basis of the positional relationship and the measured values; and fixing by welding the supporting members to the color selection electrode frame.