Pixel and organic light emitting display device using the same

摘要

An organic light emitting display device includes: a scan driver for supplying partially overlapping scan signals having at least 2H width and for supplying emission control signals; a data driver; and pixels, each including: an OLED having a cathode coupled to second power; a first transistor having a first electrode coupled to first power; a second transistor between a gate electrode and a second electrode of the first transistor and turned on when the scan signal is supplied to a current scan line; a third transistor between the data line and a second node and turned on when the scan signal is supplied to a subsequent scan line; a first capacitor coupled between the first transistor gate electrode and the second node; and a fourth transistor turned on when the scan signal is supplied to a previous scan line to supply a first voltage to the first transistor gate electrode.

主权项

1. An organic light emitting display device comprising:
a scan driver for sequentially supplying scan signals having a width of at least 2H (where “H” represents a horizontal period) to scan lines and for supplying emission control signals to emission control lines arranged in parallel to the scan lines, the scan signals partially overlapping with each other; a data driver for supplying data signals to data lines; and pixels located at crossing regions of the scan lines and the data lines, wherein each of the pixels comprises:
an organic light emitting diode having a cathode electrode electrically coupled to a second power source;a first transistor having a first electrode coupled to a first power source, and located between the first power source and the organic light emitting diode, the first transistor being for controlling an amount of current supplied from the first, power source to the organic light emitting diode;a second transistor between a gate electrode and a second electrode of the first transistor and configured to be turned on in response to a corresponding one of the scan signals being supplied to a current scan line of the scan lines, the gate electrode of the first transistor being electrically coupled to a first node;a third transistor between a corresponding one of the data lines and a second node and configured to be turned on when a corresponding one of the scan signals is supplied to a subsequent scan line of the scan lines;a first capacitor electrically coupled between the gate electrode of the first transistor and the second node; anda fourth transistor coupled between the gate electrode of the first transistor and the organic light emitting diode, wherein a gate electrode of the fourth transistor is configured to receive a corresponding one of the scan signals supplied to a previous scan line of the scan lines to supply a first voltage to the gate electrode of the first transistor.