Provided is a correction method performed in a display device including a matrix of pixels each including an organic EL element that emits light in accordance with a luminance signal. The method includes: obtaining, in advance, first correction data for correcting the luminance signal; transforming the first correction data into second correction data smaller in data size than the first correction data; and correcting the luminance signal using the second correction data. The first and second correction data respectively include first color correction data for correcting first sub pixel luminance, second color correction data for correcting second sub pixel luminance, and third color correction data for correcting third sub pixel luminance. In the transforming, the first correction data is transformed such that a data reduction amount of the second color correction data is greater than a data reduction amount of the first color correction data.