CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To solve the problem that it has to be continuously and busily detected whether a frequency change exists because a software algorithm detects a frequency change of a horizontal synchronous pulse in a conventional switching device for an S correction capacitor. SOLUTION: A control device is provided with a hardware frequency detector (11) for supplying frequency information related to a repetition frequency, and a hardware frequency change detector (12) for supplying an attentional pulse to a microcomputer (13) and an interruption input of the microcomputer when a change of frequency information is detected.