Correction method of display apparatus and correction system of the display apparatus

A correction method of a display apparatus, wherein the display apparatus comprises a display panel, a correction circuit, and a memory, the correction method comprising:

• acquiring first imaging data including all pixels in the display apparatus in a state where an image with a first grayscale is displayed on the display apparatus;
• acquiring second imaging data including all the pixels in the display apparatus in a state where an image with a second grayscale is displayed on the display apparatus;
• generating correction data based on the first imaging data and the second imaging data;
• acquiring third imaging data in a state where a test image is displayed on the display apparatus;
• calculating an MTF (modulation transfer function) value based on the third imaging data;
• and
• making a determination based on the MTF value;
• and
• outputting the correction data to the memory of the display apparatus,
• wherein the correction circuit is configured to correct image data based on the correction data stored in the memory to generate corrected image data and outputting the corrected image data to the display panel, and
• wherein the test image is an image of a white line.