Patent ID: 8154478

Claim:
An organic electro luminescence display, comprising: a pixel unit including a plurality of scan lines coupled to supply a scan signal, a plurality of data lines coupled to supply a data signal, and a plurality of pixels connected to the scan lines and the data lines, respectively; a scan driver disposed to sequentially generate scan signals and apply the scan signals generated to a plurality of the scan lines; a data driver disposed to generate data signals and apply the data signals generated to the data lines; a photo sensor generating a photo sensor signal corresponding to intensity of light ambient to the display; an image determination unit disposed to generate an image determination signal based in dependence upon an estimate of whether an image generated in response to the data signals is a moving image or a still image; a first signal processor selecting a gamma value corresponding to the brightness of the ambient light sensed by the photo sensor and applying a gamma correction signal corresponding to a selected gamma value to control a grey level voltage of the data signals; and a second signal processor comparing a previously set reference value with the photo sensor signal to generate a selection signal and generating image changing data in which an input image data is varied to correspond to the selection signal, varying a change range of the image changing data to correspond to the image determination signal, and supplying the change range of the image changing data varied to the data driver.