公开(公告)号：US06118232A

公开(公告)日：2000-09-12

申请号：US89100

申请日：1998-06-02

申请人： Osamu Ohnaka

发明人： Osamu Ohnaka

IPC分类号： H04N3/23 ,  G09G1/04 ,  H04N3/185 ,  H04N3/223 ,  H01J29/56 ,  H01J29/70

CPC分类号： H04N3/185 ,  G09G1/04 ,  H04N3/223

摘要： A compensating circuit is for compensating distortion of a picture which is displayed on a display unit having a yoke. The compensating circuit controls a yoke current to compensate a picture distortion. The compensating circuit comprises a first generating section for generating a digital deflecting compensation signal in accordance with deflecting compensation data representative of compensation value of the picture. A second generating section generating a variable voltage (+B voltage) in accordance with a PWM pulse signal to control the yoke current on the basis of the variable voltage. A peak holding circuit holds a peak voltage of a flyback pulse based on the variable voltage to produce a peak voltage signal representative of the peak voltage. An A/D converter circuit converts the peak voltage signal into a digital peak signal. A PWM section produces the above-mentioned PWN pulse signal in accordance with the digital deflecting compensation signal and the digital peak signal.

摘要翻译： 补偿电路用于补偿显示在具有轭的显示单元上的图像的失真。 补偿电路控制磁轭电流以补偿图像失真。 补偿电路包括第一产生部分，用于根据表示图像的补偿值的偏转补偿数据产生数字偏转补偿信号。 第二产生部分，根据PWM脉冲信号产生可变电压（+ B电压），以根据可变电压来控制磁轭电流。 峰值保持电路基于可变电压保持反激脉冲的峰值电压，以产生表示峰值电压的峰值电压信号。 A / D转换器电路将峰值电压信号转换成数字峰值信号。 PWM部分根据数字偏转补偿信号和数字峰值信号产生上述PWN脉冲信号。