Organic light emitting display for varying the voltages of the cathode electrodes based on the magnitude of the signal data and driving method thereof

摘要

An organic light emitting display includes a display unit divided into a plurality of fields (regions), data and scan drivers, a power supply, and a driving voltage calculator. The display unit has a plurality of cathode electrodes corresponding to the respective fields, and is configured to display an image in response to data and scan signals. The data and scan drivers respectively supply the data and scan signals to the display unit. The power supply has a first output terminal for outputting a first power and a plurality of second output terminals for outputting a plurality of second powers to the plurality of cathode electrodes. The driving voltage calculator calculates the voltage of each of the second powers for a respective one of the cathode electrodes based on a magnitude of a respective one of the data signals.

主权项

1. An organic light emitting display comprising:
a display unit spatially divided into a plurality of shared cathode electrodes each shared as a cathode electrode by each of a different plurality of organic light emitting diodes and configured to receive a respective one of a corresponding plurality of different second powers from a respective one of a corresponding plurality of second output terminals, the display unit being configured to display an image in response to data signals and scan signals; a data driver configured to generate the data signals from image signals, and to supply the generated data signals to the display unit; a scan driver for supplying the scan signals to the display unit; a power supply comprising a first output terminal for outputting a first power to the display unit, and the plurality of second output terminals for concurrently outputting respective ones of the corresponding plurality of different second powers to respective ones of the shared cathode electrodes; and a driving voltage calculator for calculating respective different voltages of the corresponding plurality of different second powers for the respective ones of the shared cathode electrodes based on magnitudes of respective ones of the data signals.