A display panel driver includes a compression circuit configured to, when receiving image data of a plurality of pixels of a target block, generate compressed image data corresponding to the target block by compressing the image data, an image memory configured to store the compressed image data, a decompression circuit configured to generate decompressed image data by decompressing the compressed image data reading from the image memory, and a drive circuit configured to drive a display panel in response to the decompressed image data. The number of bits of the compression type recognition bit of the compressed image data becomes low, when the correlation between the image data of the plurality of pixels becomes low.