ORGANIC LIGHT EMITTING DIODE DISPLAY AND DRIVING METHOD THEREOF

摘要

An OLED(Organic Light Emitting Diode) display and a driving method thereof are provided to increase a lifetime of the display device by compensating luminance with respect to time without decreasing an aperture ratio of the OLED display. Plural pixels(PX) are arrayed in a matrix, each of which includes a switching transistor and a driving transistor. Plural data lines are connected to the switching transistors to transmit a data voltage to the pixels. Plural driving voltage lines transmit a driving voltage to the driving transistors, and a voltage generator(700) applies the driving voltage to the driving voltage lines. A current sensing unit(900) senses a driving current flowing from the voltage generator to the driving voltage lines. A gray voltage generator(800) generates a gray voltage depending on a change in the driving current. A data driver(500) converts an input image signal into the data voltage based on the gray voltage and applies the data voltage to the data lines.