Data storage device for storing compensation data and data storage method for display device

A data storage device to be coupled to a display device, the display device comprising a display unit comprising a plurality of blocks arranged in successive rows and columns, each of the blocks comprising a plurality of pixels, the data storage device comprising:

• a memory device configured to store a first address value and a second address value including information on a position of one of the plurality of blocks, to store a first indication value to be utilized to determine whether the first address value is effective and a second indication value to be utilized to determine whether the second address value is effective, and to store compensation data including information on the blocks;
• an effective address determinator configured to determine whether the first address value and the second address value are effective corresponding to the first indication value and the second indication value;
• and
• an updater configured to update the first and second indication values, the first and second address values, and the compensation data.