Patent ID: 7768486

Claim:
An organic light emitting display comprising: a data driver for supplying data signals to data lines; a scan driver for sequentially supplying scan signals to scan lines and sequentially supplying emission control signals to emission control lines; a display region including a plurality of pixels adapted to receive the data signals, the scan signals and the emission control signals to display images; and a brightness controller for controlling a brightness of the display region, the brightness controller controls the brightness of the display region in response to data of one frame and intensities of peripheral light, the brightness controller includes a first brightness limiter for generating first widths of an emission control signal in accordance with a magnitude of the data of one frame, a second brightness limiter for controlling the first widths of the emission control signal in accordance with the intensities of the peripheral light, the second brightness limiter to generate second widths of the emission control signal, and a brightness control signal generator receiving the second widths of the emission control signal from the second brightness limiter, the brightness control signal generator adapted to generate brightness control signals and to transmit the brightness control signals to the scan driver.