Display apparatus and control method thereof

A display apparatus having a display to display a picture, the display apparatus comprising:

• an input unit to generate an input signal by a user;
• a data operator to calculate picture adjustment data about an optimum position and an optimum definition of the picture based on horizontal and vertical synchronous signals and an input video signal, and to calculate an average input brightness of the input video signal;
• an auto-adjuster to adjust a position and a definition of a picture being displayed on the display and to adjust an output brightness of the picture being displayed on the display;
• a gamma adjuster to adjust an output brightness of the picture being displayed on the display;
• a storage unit to store data about a gamma curve to be applied corresponding to the average input brightness of the input video signal;
• and
• a controller to control the data operator to calculate the average input brightness of the input video signal, the gamma adjuster to adjust the output brightness of the picture on the basis of the data about the gamma curve to be applied corresponding to the calculated average input brightness from the storage unit, and the auto-adjuster to adjust the picture with respect to the picture adjustment data, simultaneously.

A method of controlling a display apparatus having a display to display a picture, the method comprising:

• storing data about a gamma curve to be applied corresponding to an average input brightness of an input video signal;
• generating the input video signal;
• calculating picture adjustment data about an optimum position and an optimum definition of the picture based on synchronous signals and the input video signal;
• adjusting the picture with respect to the picture adjustment data;
• calculating the average input brightness of the input video signal;
• and
• adjusting an output brightness of the picture on the basis of the stored data about the gamma curve to be applied corresponding to the calculated average input brightness of the input video signal.