| 摘要 |
PURPOSE: A deflection compensating circuit in accordance with a beam change is provided to suppress a screen size change in accordance with a high-voltage change when an integrated-type high-voltage generation device is used, and to prevent a convergence drift from being generated, thereby supplying a stable picture quality. CONSTITUTION: An ABL(Auto Beam Limitation) change detector(120) detects a change of an ABL current from an FBT(Flyback Transformer)(110). Vertical and horizontal input gain controllers(132,134) determine gains of vertical and horizontal compensation waveforms, respectively, and output the determined gains. Vertical and horizontal waveform compensators(142,144) output the vertical and horizontal compensation waveforms according to the gains. A vertical amplification output unit(150) amplifies the compensation waveforms, and supplies a driving voltage to a vertical deflection yoke. An adding and differential amplifier(180) adds the compensation waveforms to the ABL change, compares the added values with a reference voltage, and amplifies a difference. An E/W(East/West) compensation controller(190) outputs an E/W compensation control signal to a horizontal output unit(200).
|
