Display devices and methods of adjusting luminance of a logo region of an image for the same

The organic light emitting display device includes a display panel and a display driving integrated circuit. The display panel includes a blue pixel and outputting the red pixel R, a green pixel G and the blue light to output a green color light and outputting the red light, and displays an image including the logo area. A display drive integrated circuit, but drives a display panel, reducing the intensity of the blue light outputted from the blue pixel which is located on the logo area of ​​the image to reduce the brightness of the logo areas of an image.