wherein the first memory is configured to store a first time node value, a second time node value, a pre-term compensation parameter set, a mid-term compensation parameter set and a post-term compensation parameter set; the first time node value is less than the second time node value, the pre-term compensation parameter set, the mid-term compensation parameter set and the post-term compensation parameter set each comprises at least one compensation parameter and a value of a same compensation parameter in the pre-term compensation parameter set and the post-term compensation parameter set is different from a value of the same compensation parameter in the mid-term compensation parameter set, values of the compensation parameter in the pre-term compensation parameter set are gradually decreased with time, values of the compensation parameter in the post-term compensation parameter set are gradually increased with time;

the first timer is connected with the processor and is configured to: start timing from that pixel data is received by the processor, obtain first timing information, and send the first timing information to the processor, wherein the pixel data comprises gray-scale data; and

the processor is connected with the first timer and the first memory respectively, and is configured to: receive the pixel data and the first timing information, compensate the gray-scale data of the pixel data according to the first timing information and the compensation parameter in the pre-term compensation parameter set based on a determination that the first timing information does not reach the first time node value; compensate the gray-scale data of the pixel data according to the first timing information and the compensation parameter in the mid-term compensation parameter set based on a determination that the first timing information reaches the first time node value and does not reach the second time node value; and compensate the gray-scale data of the pixel data according to the first timing information and the compensation parameter in the post-term compensation parameter set based on a determination that the first timing information reaches the second time node value.