Display apparatus and method for eliminating an image sticking thereof

The present invention relates to a display device and the after-image removal method. Remove residual image method of the display device according to the present invention comprises a step for detecting the pixels of the image data and; Calculating the OSD data corresponding to the detected pixel data; And generating the OSD data, the calculated; The remaining to the OSD data in the pixel data comprises the step of displaying for a predetermined refresh time. This makes it possible to provide a display device and the after-image removal method which can effectively remove the residual image by the display to generate OSD data according to the data value of the input video signal.