PIXEL AND ORGANIC LIGHT EMITTING DISPLAY DEVICE USING THE SAME
First Claim
Patent Images
1. A pixel comprising:
- an organic light emitting diode of which a cathode electrode is connected to a second power supply;
a first transistor for controlling the amount of current that flows to the second power supply through the organic light emitting diode from a first power supply;
a second transistor connected between a data line and a second node, and turned on by a scanning signal supplied to an i-th scanning line, wherein i is a natural number;
a first capacitor connected between a first node and the second node, wherein the first node is connected to a gate electrode of the first transistor;
a second capacitor connected between the first power supply and the first node;
a plurality of third transistors connected between the first node and the second electrode of the first transistor, wherein the third transistors are turned on by the scanning signal supplied to the i-th scanning line;
a plurality of fourth transistors connected between an initial power supply and the first node, and turned on by a scanning signal supplied to the i−
1-th scanning line; and
a leakage current prevention unit for supplying a fixed voltage to a fourth node between the fourth transistors and to a third node between the third transistors.
2 Assignments
0 Petitions
Accused Products
Abstract
A pixel and display having the pixel are disclosed. The pixel includes transistors along a leakage path from a storage capacitor. The pixel also includes transistors to apply a reference voltage to the leakage path to minimize leakage.
50 Citations
14 Claims
-
1. A pixel comprising:
-
an organic light emitting diode of which a cathode electrode is connected to a second power supply; a first transistor for controlling the amount of current that flows to the second power supply through the organic light emitting diode from a first power supply; a second transistor connected between a data line and a second node, and turned on by a scanning signal supplied to an i-th scanning line, wherein i is a natural number; a first capacitor connected between a first node and the second node, wherein the first node is connected to a gate electrode of the first transistor; a second capacitor connected between the first power supply and the first node; a plurality of third transistors connected between the first node and the second electrode of the first transistor, wherein the third transistors are turned on by the scanning signal supplied to the i-th scanning line; a plurality of fourth transistors connected between an initial power supply and the first node, and turned on by a scanning signal supplied to the i−
1-th scanning line; anda leakage current prevention unit for supplying a fixed voltage to a fourth node between the fourth transistors and to a third node between the third transistors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. An organic light emitting display device, comprising:
-
a scanning driver for supplying a scanning signal to scanning lines and for supplying an emission control signal to emission control lines; a data driver for supplying a data signal to data lines; a plurality of pixels located near intersections of the scanning lines and the data lines; wherein i is a natural number and a pixel that is located on the i-th horizontal line, includes; an organic light emitting diode of which a cathode electrode is connected to a second power supply; a first transistor for controlling the amount of current that flows to the second power supply through the organic light emitting diode from a first power supply; a second transistor connected between a data line and a second node, and turned on by a scanning signal supplied to an i-th scanning line; a first capacitor connected between a first node and the second node, wherein the first node is connected to a gate electrode of the first transistor; a second capacitor connected between the first power supply and the first node; a plurality of third transistors connected between the first node and the second electrode of the first transistor, wherein the third transistors are turned on by the scanning signal supplied to the i-th scanning line; a plurality of fourth transistors connected between an initial power supply and the first node, and turned on by a scanning signal supplied to the i−
1-th scanning line; anda leakage current prevention unit for supplying a reference voltage to a fourth node between the fourth transistors and to a third node between the third transistors. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification