Method for manufacturing dual panel-type organic electroluminescent display device

• US 8,025,544 B2
• Filed: 02/05/2010
• Issued: 09/27/2011
• Est. Priority Date: 09/17/2004
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Lee, Kwang-Yeon, Yoo, Choong-Keun
• Primary Examiner(s): Ton; Toan
• Assistant Examiner(s): HANLEY, BRITT D
• Application Number:
  US12/701,166
• Publication Number:
  US 20100136723A1
• Time in Patent Office: 599 Days
• Field of Search: None
• US Class Current: 445/25
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/1275 Electrical connections of the two substrates

Abstract

A dual panel-type organic electroluminescent display device includes a first substrate on which gate and data lines cross each other to define sub-pixels. Array elements are disposed at the sub-pixels on the first substrate. A first electrode is disposed on substantially the entire surface of a second substrate opposing the first substrate. An insulating pattern is disposed on the first electrode, an organic electroluminescent layer is disposed on the first electrode, and a second electrode is disposed on the organic electroluminescent layer at each sub-pixel. A connection pattern connects the array element and the second electrode at each sub-pixel. The connection pattern contacts the second electrode under the insulating pattern.

Claims

1. A method for manufacturing a dual panel-type organic electroluminescent display device, the method comprising:

forming gate and data lines crossing each other on a first substrate to define sub-pixels;

forming an array element at at least one of the sub-pixels on the first substrate, the array element including a switching thin film transistor and a driving thin film transistor;

forming a first electrode on substantially an entire surface of a second substrate;

forming an insulating pattern on the first electrode at the at least one of the sub-pixels;

forming organic electroluminescent layers on the first electrode within the at least one of the sub-pixels;

forming a second electrode on the organic electroluminescent layer and the insulating pattern at the at least one of the sub-pixels;

forming a connection pattern on the second electrode and connected to the driving thin film transistor at the at least one of the sub-pixels; and

attaching the first and second substrates such that the connection pattern contacts the second electrode on the insulating pattern,

wherein the connection pattern overlaps the insulating pattern except the organic electroluminescent layer wherein the organic electroluminescent layer and the insulating pattern are entirely disposed at the same layer and have substantially the same thickness to form a flat surface.

2. The method according to claim 1, further comprising forming a connection electrode connected to the driving thin film transistor and the connection pattern.

3. The method according to claim 2, wherein the connection electrode is electrically connected to a drain electrode of the driving thin film transistor.

4. The method according to claim 1, wherein the insulating pattern has a first width and has a matrix form.

5. The method according to claim 4, further comprising forming a partition wall on the insulating pattern, the partition wall having a second width narrower than the first width of the insulating pattern to expose a portion of the insulating pattern inside the sub-pixel.

6. The method according to claim 5, wherein the second electrode covers the portion of the insulating pattern inside the sub-pixel.

7. The method according to claim 1, wherein the organic electroluminescent layer is formed by a deposition method using a shadow mask such that the organic electroluminescent layer does not overlap the insulating pattern.

8. The method according to claim 1, wherein a plane area of the second electrode is larger than a plane area of the organic electroluminescent layer at the at least one of the sub-pixels.

9. The method according to claim 1, further comprising forming a seal pattern on a peripheral portion of the first and second substrates.