Display device performing image sticking compensation, and method of compensating image sticking in a display device

A method of compensating image sticking in a display device, the method comprising:

• calculating current degradation amounts based on input image data in a first frame;
• calculating first accumulated degradation amounts by accumulating the current degradation amounts;
• writing the first accumulated degradation amounts to a volatile age memory located outside an image sticking compensation circuit;
• generating backup accumulated degradation amounts based on the first accumulated degradation amounts;
• writing the backup accumulated degradation amounts to an internal age memory of the image sticking compensation circuit;
• reading second accumulated degradation amounts from the volatile age memory in a second frame;
• comparing the second accumulated degradation amounts read from the volatile age memory and the first accumulated degradation amounts calculated by accumulating the current degradation amounts;
• and
• compensating the input image data in the second frame by selectively using the second accumulated degradation amounts read from the volatile age memory or the backup accumulated degradation amounts stored in the internal age memory according to a result of the comparing.

A method of compensating image sticking in a display device, the method comprising:

• generating pre-scaled input image data by applying a pre-scaling coefficient to input image data;
• calculating current degradation amounts based on the pre-scaled input image data in a first frame;
• calculating first accumulated degradation amounts by accumulating the current degradation amounts;
• writing the first accumulated degradation amounts to a first memory;
• generating backup accumulated degradation amounts based on the first accumulated degradation amounts;
• writing the backup accumulated degradation amounts to a second memory;
• reading second accumulated degradation amounts from the first memory in a second frame;
• comparing the second accumulated degradation amounts and the first accumulated degradation amounts;
• and
• compensating the pre-scaled input image data in the second frame by using one of the second accumulated degradation amounts or the backup accumulated degradation amounts according to a result of the comparing.