Abstract

Color display tube (CDT) used in computer monitors, consists of many components. Deflection yoke (DY) among them supplies the vertical and horizontal magnetic fields so that the spatial trajectories of electron beams are deflected according to the synchronization signals. If the magnetic fields are not correctly formed, there will be color blurring or blooming by a misconvergence of each beam and the color image on screen may not be clear. Therefore, in the manufacturing of DY, its quality is strictly controlled to get the desired convergence and the occurred misconvergence will be cured by sticking a ferrite sheet on the inner part of the DY. However, because the DY compensation process requires expert's knowledge and experience, it is not easy to determine how to stick the sheet. An intelligent adjustment process using the knowledge-base of the ferrite sheet for DY manufacturing is introduced. >

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