Method of compensatiing a left-right gamma difference, vision inspection apparatus performing the method and display apparatus utilizing the method

A vision inspection apparatus comprising:

• a plurality of image sensors configured to sense a plurality of sample grayscales displayed on a plurality of areas defined in a display area of a display apparatus;
• a left-right intensity estimator configured to calculate intensity estimation values of a left reference boundary area which is adjacent to a left side at a central area of the display area, a left boundary area which is adjacent to a left end portion of the display area, a right reference boundary area which is adjacent to a right side at the central area, and a right boundary area which is adjacent to a right end portion of the display area;
• and
• a correction value calculator configured to calculate
• a first grayscale correction value of the left boundary area such that an intensity estimation value of the left boundary area is equal to an intensity estimation value of the left reference boundary area, and
• a second grayscale correction value of the right boundary area such that an intensity estimation value of the right boundary area is equal to an intensity estimation value of the right reference boundary area.

A display apparatus comprising:

• a display panel comprising a plurality of pixels disposed in a display area;
• a memory which stores a first grayscale correction value of a left boundary area and a second grayscale correction value of a right boundary area to compensate a gamma difference between the left boundary area and the right boundary area, wherein the left boundary area is located adjacent to a left end portion of the display area, and the right boundary area is located adjacent to a right end portion of the display area;
• a data corrector configured to generate correction grayscale data to correct grayscale data of a pixel based on the first and second grayscale correction values;
• and
• a data driver configured to generate a grayscale voltage based on the correction grayscale data and to provide a data line of the display panel with the grayscale voltage.