Luminance correction system and method for correcting luminance of display panel

A luminance correction system including a display device, comprising:

• an image pickup device configured to pick up a test image displayed on a display panel and generate pickup data;
• a parameter calculation device configured to calculate a first target luminance that is a maximum luminance of a reference area in the display panel and a detected maximum luminance that is a luminance of a correction target sub-pixel based on the pickup data with respect to a maximum grayscale, determine a second target luminance by correcting the first target luminance, and calculate correction parameters for calculating a target grayscale that compensates an input grayscale of the correction target sub-pixel;
• and
• the display device including the display panel, the display device configured to compensate the input grayscale of the correction target sub-pixel to the target grayscale based on the correction parameters and generate a data voltage by adjusting upward a gamma voltage corresponding to the target grayscale.