Display apparatus

A display apparatus having a high voltage flyback transformer (FBT) driving circuit, comprising:

• a transformer having primary and secondary coils;
• a high voltage detector to detect an output voltage of the secondary coil;
• a high voltage compensator to output a high voltage compensating signal based on the detected voltage;
• a DC voltage controller to adjust a DC voltage according to the high voltage compensating signal and to output the adjusted DC voltage to the primary coil;
• a horizontal deflector to generate a horizontal deflecting pulse based on the adjusted DC voltage;
• a turns ratio adjuster to adjust a turns ratio of the primary and the secondary coils;
• and
• a controller to control said turns ratio adjuster so as to make the adjusted DC voltage output from said DC voltage controller higher than a lowest limit when a frequency of a received horizontal synchronous signal is lower than a predetermined reference level at a low resolution.