Samsung Electronics Co., Ltd.

Ye-mok Yang

Kil-Ho Shin

A picture stabilizing circuit for a semiwide-screen television receiver capable of preventing vertical lines of the picture from being bent by detecting and compensating for a high-voltage variation caused by a picture brightness variation. In a picture stabilizing circuit for a semiwide-screen television receiver including a high voltage circuit for providing a high voltage induced in a secondary winding of a flyback transformer to an anode of a cathode ray tube, and a horizontal output device for controlling a deflection current using a voltage applied to a primary winding of the flyback transformer as its supply voltage and compensating for the deflection current in accordance with an east/west (E/W) signal, the picture stabilizing circuit comprising: a detecting device for detecting variation of the high voltage in the secondary winding of the flyback transformer and for outputting a signal corresponding to the variation of the high voltage; and an adder for adding the output signal of the detecting device to the E/W signal.

Circuit and method for compensating for fluctuations in high voltage of

A video signal luminance control apparatus is provided, which includes an input portion for receiving a luminance signal of the video signal, a transistor with a collector receiving the input luminance signal input from the input portion, via a resistor, and a controller which is connected to the base of the transistor for outputting a control signal for controlling the on/off operation of the transistor in an area where an on-screen-display (OSD) character is displayed. A simple transistor receiving the control signal is used to control the luminance of a video signal in an area where an OSD character is displayed, thereby providing a luminance control apparatus for clearly displaying OSD characters.

Growing community of inventors

Suwon, South Korea

Ye-mok Yang