Method for evaluating lifespan of display panel and lifespan evaluation system for display panel

A lifespan evaluation system for a display panel, comprising:

• a display panel including a first single color area configured to display a first single color, a second single color area configured to display a second single color, a third single color area configured to display a third single color, and a mixed color area configured to display a mixed color in which the first to third single colors are mixed;
• a panel driving device configured to control an emission of the display panel to deteriorate the display panel;
• a luminance measuring device configured to measure first single color luminance retention rates of the first to third single color areas and a first mixed color luminance retention rate of the mixed color area at a plurality of luminance measurement time points;
• a lifespan calculating device configured to calculate mixed color spectrums of the mixed color area at the luminance measurement time points based on second single color luminance retention rates of the first to third single color areas converted from the first single color luminance retention rates, to calculate mixed color offset values based on the mixed color spectrums, and to calculate a second mixed color luminance retention rate of the mixed color area by applying the mixed color offset values to the first mixed color luminance retention rate.