Display device and electronic device having afterimage compensation

A display device comprising:

• a display panel that includes a plurality of blocks, wherein a plurality of pixels are arranged in each of the plurality of blocks;
• and
• an afterimage compensation circuit configured to receive input image signals and generate compensation image signals by compensating for the input image signals based on deterioration information for each of the plurality of blocks, and
• wherein the afterimage compensation circuit includes:
• a nonvolatile memory where deterioration data for each of the plurality of blocks is accumulated at each of a plurality of backup times in a preset backup period;
• a compensation unit configured to receive accumulated deterioration data from the nonvolatile memory as the deterioration information and to compensate for the input image signals based on the accumulated deterioration data to generate the compensation image signal;
• and
• a backup period adjustment unit configured to vary a duration of the backup period based on a driving frequency of the display panel, wherein
• a first driving mode is a driving mode where the display panel operates above a reference frequency,
• a second diving mode is a driving mode where the display panel operates below the reference frequency,
• the backup period adjustment unit adjusts the duration of the backup period in the second driving mode to be greater than the duration of the backup period in the first driving mode, and
• deterioration information in any one of the plurality of blocks is the same for each of the plurality of pixels in the any one of the plurality of blocks.

An electronic device comprising:

• a display device comprising:
• a display panel that includes a plurality of blocks, wherein a plurality of pixels are arranged in each of the plurality of blocks;
• and
• an afterimage compensation circuit configured to receive input image signals and generate compensation image signals by compensating the input image signals based on deterioration information for each of the plurality of blocks, and
• wherein the afterimage compensation circuit includes:
• a nonvolatile memory including a first storage area where deterioration data for each of the plurality of blocks is accumulated at each of a plurality of backup times in a preset backup period, and a second storage area where information about a final backup time among the plurality of backup times is stored;
• and
• a compensation unit configured to receive accumulated deterioration data stored in the first storage area as the deterioration information and to compensate the input image signals based on the accumulated deterioration data to generate the compensation image signals, wherein deterioration information in any one of the plurality of blocks is the same for each of the plurality of pixels in the any one of the plurality of blocks.