Organic light emitting display device and driving method thereof

The invention discloses an organic light-emitting display device and a driving method thereof, and relates to the technical field of display, the organic light-emitting display device comprises an organic light-emitting display panel, an electrochromic device, a control circuit, a comparison module, a first driving module and a second driving module, the comparison module is connected with the control circuit, and the first driving module is connected with the second driving module. The first driving module is used for comparing the gray-scale value of each pixel with a preset gray-scale value, when the gray-scale value is smaller than the preset gray-scale value, the first driving module compensates the gray-scale value according to a compensation formula, and the second driving module reduces the output voltage of the color-changing area according to an adjustment coefficient so as to adjust the color-changing area. And reducing the light emitting brightness of the color changing area to the pixel area. Thr