HEATER VOLTAGE SUPPLY CIRCUIT TO CATHODE RAY TUBE

摘要

PROBLEM TO BE SOLVED: To provide a heater voltage supply circuit that applies a heater voltage to each heater connecting respectively to red(R), green(G) and blue(B) electron guns so as to allow the R, G and B electron guns to emit electrons quickly. SOLUTION: The circuit is provided with R, G and B electron guns 20. In this case, a heater 40 is driven independently by using a transformer 50 that has a primary winding receiving a heater voltage and secondary windings which applies a voltage induced from the primary winding to each heater 40 connecting to the R, G and B electron guns 20. Thus, the drive time of a cathode ray tube 10 is reduced, the impedance matching is facilitated and the efficiency is improved.