Organic electro luminescence display and driving method of the same

An organic electro luminescence display comprising:

• a pixel unit for displaying an image that is composed of a plurality of frames;
• a scan driver for supplying a scan signal and a light emission control signal to the pixel unit;
• a data driver for generating a data signal from a video data and for supplying the generated data signal to the pixel unit;
• and
• a control unit coupled to each of the scan driver and the data driver, the control unit controlling a pulse width of the light emission control signal using a frame data which is a sum of grey levels of the video data inputted in a frame, and controlling a frame period of the frame according to a size of the frame data, the control unit including at least two memories, a first frame and a second frame of the image being stored in different memories.

A method for driving an organic electro luminescence display which includes a pixel unit for displaying an image that is composed of a plurality of frames, the method comprising:

• estimating a frame data which is a sum of a video data stored in a frame memory;
• controlling a frame period of the frame according to a size of the frame data;
• estimating a luminance range limit of the pixel unit from the frame data;
• and
• generating a light emission control signal according to the luminance range limit, a pulse width and a pulse number of the light emission control signal being determined to correspond to the luminance range limit.

A method for driving an organic electro luminescence display which includes a pixel unit for displaying an image that is composed of a plurality of frames, the method comprising:

• estimating a frame data which is a sum of a video data stored in a frame memory;
• supplying a black data through a data signal that is supplied to the pixel unit if a size of the frame data is greater than a predetermined value;
• controlling a frame period of the frame according to a size of the frame data;
• estimating a luminance range limit of the pixel unit from the frame data;
• and
• generating a light emission control signal according to the luminance range limit, a pulse width and a pulse number of the light emission control signal being determined to correspond to the luminance range limit.

A method for driving an organic electro luminescence display which includes a pixel unit for displaying an image that is composed of a plurality of frames, the method comprising:

• storing a video data of a first frame in a first frame memory;
• summing the stored video data of the first frame to generate a first frame data of the first frame after the video data of the first frame is stored;
• controlling a frame period of the first frame according to a size of the first frame data;
• estimating a luminance range limit of the pixel unit from the first frame data;
• generating a first light emission control signal according to the luminance range limit from the first frame data, a pulse width and a pulse number of the first light emission control signal being determined to correspond to the luminance range limit from the first frame data;
• storing a video data of a second frame in a second frame memory;
• summing the stored video data of the second frame to generate a second frame data of the second frame after the video data of the second frame is stored;
• controlling a frame period of the second frame according to a size of the second frame data;
• estimating a luminance range limit of the pixel unit from the second frame data;
• and
• generating a second light emission control signal according to the luminance range limit from the second frame data, a pulse width and a pulse number of the second light emission control signal being determined to correspond to the luminance range limit from the second frame data.