Apparatus and method of adjusting horizontal position for a video display appliance
AssigneeLG Electronics Inc.
InventorBong-Soon Lee
Life of this patent
Estimating the term…
Abstract
An apparatus for adjusting a horizontal position of a video display appliance in which a display image is put in the center of a monitor screen. The apparatus includes a comparative circuit, a horizontal correction circuit and a deflection circuit. The comparative circuit detects an overlap signal representing that a horizontal flyback pulse and a video signal are overlapped. The horizontal correction circuit calculates a mean value of first and second horizontal values and transmits the mean value to the deflection circuit. The deflection circuit adjusts the horizontal position using the mean value as an adjustment value to put the display image in the middle of the monitor screen.
Claims13
An apparatus for adjusting a horizontal position of a video display appliance, the apparatus comprising:
- a comparative circuit for receiving a horizontal flyback pulse and a video signal and outputting an overlap signal, the overlap signal being generated when the horizontal flyback signal is inputted simultaneously with the video signal;
- a horizontal position correction circuit for calculating an adjustment value of the horizontal position based on the overlap signal and outputting the adjustment value;
- and
- a deflection circuit for adjusting the horizontal position on the basis of the adjustment value.
An apparatus for adjusting a horizontal position of a video display appliance, the apparatus comprising:
- a comparative circuit for receiving a horizontal flyback pulse and a video signal and outputting a first overlap signal and a second overlap signal, the first and second overlap signals being generated when the horizontal flyback pulse is inputted simultaneously with the video signal, the first overlap signal being generated on a left side of a total range of the available horizontal position, and the second overlap signal being generated on a right side of a total range of the available horizontal position;
- a horizontal position correction circuit for calculating a mean value of first and second horizontal position values and for outputting the mean value as an adjustment value of the horizontal position, the first horizontal position value representing the horizontal position when the first overlap signal is generated, and the second horizontal position value representing the horizontal position when the second overlap signal is generated;
- and
- a deflection circuit for adjusting the horizontal position based on the adjustment value.
A method of adjusting a horizontal position of a video display appliance, the method comprising the steps of:
- detecting a first overlap signal representing that an horizontal flyback pulse is overlapped with a video signal on a left side of a total range of an available horizontal position;
- detecting a second overlap signal representing that the horizontal flyback pulse is overlapped with the video signal in a right side of the total range of the available horizontal position;
- calculating a mean value of first and second horizontal position values, the first horizontal position value corresponding to the horizontal position where the first overlap signal is generated, and the second horizontal position value corresponding to the horizontal position where the second overlap signal is generated;
- and
- adjusting the horizontal position based on the mean value which is used as an adjustment value of the horizontal position.
Dependencies are inferred from the claim text.