Patent ID: 6011593
Filing Date: 2000-01-04
Classification: H04N

Abstract:
A display apparatus including a cathode ray tube, a horizontal deflection output circuit for driving a horizontal deflecting coil of said cathode ray tube, a vertical deflection output circuit for driving a vertical deflecting coil of said cathode ray tube, and a video circuit for driving a cathode of said cathode ray tube, said display apparatus further comprising:luminance detecting means for detecting a luminance of said cathode ray tube and outputting a signal corresponding to detected luminance; anddeflection size control quantity adjusting means for controlling said horizontal deflection output circuit to stabilize a deflection size according to a deflection size correcting quantity, said deflection size correcting quantity being determined on the basis of said signal from said luminance detecting means in such a manner that said deflection size correcting quantity is varied at different rates as between a first luminance range and second luminance range higher than said first luminance range.