Pixel and organic light emitting display device including current mirror

摘要

An organic light emitting display includes: pixels respectively positioned in areas defined by scan lines and data lines; and a data driver configured to supply a data signal to the data lines, the data signal includes a first data signal corresponding to an emission of the pixels and a second data signal corresponding to a non-emission of the pixels, wherein each pixel includes: an organic light emitting diode; a first transistor coupled to the organic light emitting diode, the first transistor configured to be a current source driven in a saturation region; a second transistor coupled as a current mirror to the first transistor, the second transistor configured to control an amount of a current flowing in the first transistor; and a third transistor coupled to the second transistor, the third transistor configured to be a switch driven in a linear region, according to the data signal.

主权项

1. An organic light emitting display, comprising:
pixels respectively positioned in areas defined by scan lines and data lines; and a data driver configured to supply a data signal to the data lines, the data signal comprises a first data signal corresponding to an emission of the pixels and a second data signal corresponding to a non-emission of the pixels, wherein each pixel comprises:
an organic light emitting diode;a first transistor coupled to the organic light emitting diode, the first transistor configured to be a current source driven in a saturation region, wherein a gate electrode of the first transistor is coupled to a first node;a second transistor coupled as a current mirror to the first transistor, the second transistor configured to control an amount of a current flowing in the first transistor;a third transistor coupled to the second transistor, the third transistor configured to be a switch driven in a linear region according to the data signal, wherein a gate electrode of the third transistor is coupled to a second node; anda storage capacitor coupled between a first power source and the second node, wherein the first transistor is coupled between an anode electrode of the organic light emitting diode and the first power source, wherein a first electrode of the second transistor is coupled to the first power source, and a second electrode and a gate electrode of the second transistor are coupled to the first node, and wherein the third transistor is coupled between the first node and a second power source, and the second power source being set to a voltage lower than a voltage of the first power source.