CONVERGENCE CORRECTION DEVICE, CONVERGENCE CORRECTION METHOD, MIS-CONVERGENCE DETECTOR, MIS-CONVERGENCE DETECTION METHOD AND PHOTODETECTOR FOR MIS-CONVERGENCE DETECTION

摘要

PURPOSE: To provide a convergence correction device rich in generalpurpose performance with simple configuration by which convergence is easily and accurately corrected. ;CONSTITUTION: The device is provided with a photodetector 41 having two photodetectors detecting an incident light in a circle of a screen 122 of a color cathode ray tube 121 for each half circle and with a comparator means 123 comparing levels of photodetection outputs of the two photodetectors respectively for each spectral line almost in parallel with a border line of a half circle in a primary color different from each other and displayed on a tube screen of the color cathode ray tube 121, and a convergence correction control signal is applied from a convergence correction data generating section 124 to a convergence means of the color cathode ray tube 121 based on the result of comparison by the comparator means 123.;COPYRIGHT: (C)1993,JPO&Japio