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Active matrix organic electroluminescence display device

Imported: 24 Feb '17 | Published: 24 Aug '04

Jae-Yong Park, Tae-Joon Ahn

USPTO - Utility Patents

Abstract

An active matrix organic electroluminescence display device includes a substrate, a gate line on the substrate, a data line crossing the gate line, a power line on the substrate, a first switching thin film transistor electrically connected to the gate line and the data line, a first driving thin film transistor electrically connected to the first switching thin film transistor and the power line, a storage capacitor electrically connected to the first switching thin film transistor, the first driving thin film transistor and the power line, and an electroluminescent diode electrically connected to the first driving thin film transistor, wherein the electroluminescent diode includes a first electrode and a second electrode over the first electrode, and the first electrode covers the storage capacitor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

In the drawings:

FIG. 1 is an equivalent circuit diagram for a pixel of an active matrix organic electroluminescence display device in the related art;

FIG. 2 is a plan view for a pixel of an active matrix organic electroluminescence display device in the related art;

FIG. 3 is a cross-sectional view along the line III—III of FIG. 2;

FIG. 4 is a schematic view showing an active matrix organic electroluminescence display device of a bottom emission mode in the related art;

FIG. 5 is a view illustrating a region where light is emitted;

FIG. 6 is a plan view of an active matrix organic electroluminescence display device according to a first embodiment of the present invention;

FIG. 7 is a cross-sectional view along the line VII—VII of FIG. 6;

FIG. 8 is a schematic view illustrating an active matrix organic electroluminescence display device of a top emission mode according to the present invention;

FIG. 9 is a showing a region where light is emitted;

FIG. 10 illustrates a cross-sectional view of an active matrix organic electroluminescence display device according to a second embodiment of the present invention; and

FIG. 11 is a circuit diagram of an active matrix organic electroluminescence display device according to a third embodiment of the present invention.

Claims

1. An active matrix organic electroluminescence display device, comprising:

2. The device according to claim 1, wherein the first electrode covers the first switching thin film transistor and the first driving thin film transistor.

3. The device according to claim 2, wherein the first electrode covers a portion of the power line.

4. The device according to claim 3, wherein the first electrode overlaps a portion of the gate line and a portion of the data line.

5. The device according to claim 1, wherein the first electrode is made of an opaque conductive material and the second electrode is made of a transparent conductive material.

6. The device according to claim 1, further comprising a second switching thin film transistor and a second driving thin film transistor, the second switching thin film transistor electrically connected to the gate line, the data line and the first switching thin film transistor, the second driving thin film transistor electrically connected to the first switching thin film transistor, the first driving thin film transistor and the storage capacitor.

7. The device according to claim 6, wherein the first electrode covers the first switching thin film transistor and the first driving thin film transistor.

8. The device according to claim 7, wherein the first electrode covers a portion of the power line.

9. The device according to claim 8, wherein the first electrode overlaps a portion of the gate line and a portion of the data line.

10. The device according to claim 6, wherein the first electrode is made of an opaque conductive material and the second electrode is made of a transparent conductive material.

11. An active matrix organic electroluminescence display device, comprising:

12. The device according to claim 11, wherein the first electrode covers the plurality of thin film transistors.

13. The device according to claim 12, wherein the first electrode covers a portion of the power line.

14. The device according to claim 13, wherein the first electrode overlaps a portion of the gate line and a portion of the data line.

15. The device according to claim 12, wherein the first electrode is made of an opaque conductive material and the second electrode is made of a transparent conductive material.

16. The device according to claim 15, wherein the plurality of thin film transistors include two thin film transistors.

17. The device according to claim 15, wherein the plurality of thin film transistors include four thin film transistors.

18. The device according to claim 17, wherein two of the thin film transistors are switching thin film transistors having gate electrodes electrically connected to the gate line.

19. The device according to claim 18, wherein two of the thin film transistors are driving thin film transistors having gate electrodes electrically connected to one end of the storage capacitor.

20. The device according to claim 19, wherein one of the driving thin film transistors has a drain electrode electrically connected to another end of the storage capacitor and another of the driving thin film transistors has a source electrode electrically connected to the another end of the storage capacitor and a drain electrode electrically connected to the electroluminescent diode.