To provide an image display device and an image data correction circuit which are capable of suppressing the degradation of image quality while maintaining a small memory capacity.

Compressed data is obtained from a one-image portion of image data (pixel data) by adjusting a compression rate by a reference data generation circuit 12 and an OD precision control circuit 13 so that one image has a prescribed amount of data, and the compressed data and OD precision information indicating a restoration precision of image data resulting from decompressing the compressed data are stored in a memory 14, and the compressed data is decompressed by a reference data read circuit 15 and a reference data circuit 16 on the basis of the OD precision information, to generate reference data (Red data), and an amount of overdrive of the one-image portion of image data is generated by a correction circuit 11 on the basis of the reference data and the OD precision information, to generate corrected image data (OD Data).