ORGANIC LIGHT EMITTING DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME

• US 20120256973A1
• Filed: 12/27/2011
• Published: 10/11/2012
• Est. Priority Date: 04/07/2011
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, Hee-Dong, Ko, Sam-Min
• Granted Patent: US 9,035,546 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements

Abstract

The organic light emitting display device includes an organic light emitting display panel and a data driver, wherein the organic light emitting display panel includes an active region which includes pixel driving TFTs for embodying an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light, a GIP region which includes a gate driver formed with a plurality of gate driving TFTs for respectively driving gate lines of the active region, a GND region formed between the GIP region and the active region to be formed with a base voltage line for supplying base voltage to the organic luminescent elements of the active region, and a sealant region formed with a sealant for attaching an upper substrate to a lower substrate, and wherein the GND region includes out-gassing blocking holes.

Claims

1. An organic light emitting display device including an organic light emitting display panel and a data driver that drives data lines of the organic light emitting display panel, wherein the organic light emitting display panel comprises:

an active region which includes pixel driving TFTs that embodies an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light;

a GIP region, which includes a gate driver with a plurality of gate driving TFTs that respectively drive gate lines of the active region;

a GND region between the GIP region and the active region to be formed with a base voltage line that supplies base voltage to the organic luminescent elements of the active region; and

a sealant region having a sealant that attaches an upper substrate to a lower substrate, and

wherein the GND region includes out-gassing blocking holes that block out-gassing occurring from the sealant and at least one protective film formed at the GIP region.

2. The organic light emitting display device according to claim 1, wherein the GIP region is adjacent to the sealant region.

3. The organic light emitting display device according to claim 1, wherein each of the organic luminescent elements comprises:

an anode connected with a drain electrode of each pixel driving TFT;

a bank insulation film having a bank hole for exposure of the anode;

a column spacer formed on the bank insulation film so as to maintain a cell gap; and

an organic layer on the anode which is exposed through the bank hole, and a cathode formed on the organic layer.

4. The organic light emitting display device according to claim 3, wherein:

each pixel driving TFT at the active region has a first protective film made of an inorganic insulation material, a second protective film made of an organic insulation material on the first protective film, and the bank insulation film on the second protective film; and

each gate driving TFT formed at the GIP region is formed with a first protective film made of the inorganic insulation material and a bank insulation film formed on the first protective film.

5. The organic light emitting display device according to claim 4, wherein the out-gassing blocking holes comprise:

a first contact hole between the first protective film formed on each pixel driving TFT and the first protective film on each gate driving TFT;

a second contact hole between the second protective film formed on the pixel driving TFT and the first protective film on the gate driving TFT; and

a third contact hole between the bank insulation film formed on the pixel driving TFT and the bank insulation film on the gate driving TFT.

6. The organic light emitting display device according to claim 3, wherein:

each pixel driving TFT at the active region is has a first protective film made of an inorganic insulation material, a second protective film made of an organic insulation material on the first protective film, and the bank insulation film on the second protective film; and

each gate driving TFT formed at the GIP region is formed with a first protective film made of the inorganic insulation material, a second protective film made of the organic insulation material on the first protective film, and a bank insulation film formed on the second protective film.

7. The organic light emitting display device according to claim 6, wherein the out-gassing blocking holes comprise:

a first contact hole between the first protective film formed on each pixel driving TFT and the first protective film on each gate driving TFT;

a second contact hole between the second protective film on the pixel driving TFT and the second protective film formed on the gate driving TFT; and

a third contact hole between the bank insulation film formed on the pixel driving TFT and the bank insulation film on the gate driving TFT.

8. The organic light emitting display device according to claim 4, wherein the first protective film is made of the inorganic insulation material, each of the second protective film and the bank insulation film is made of the organic insulation material, the second protective film is made of a photo-acrylic material, and the bank insulation film is made of a polyimide material.

9. The organic light emitting display device according to claim 3, wherein:

each pixel driving TFT at the active region has a protective film made of an organic insulation material and the bank insulation film on the protective film; and

each gate driving TFT at the GIP region is formed with a bank insulation film.

10. The organic light emitting display device according to claim 9, wherein the out-gassing blocking holes comprise:

a first contact hole between the protective film on each pixel driving TFT and the bank insulation film on each gate driving TFT; and

a second contact hole between the bank insulation film formed on the pixel driving TFT and the bank insulation film on the gate driving TFT.

11. The organic light emitting display device according to claim 3, wherein:

each pixel driving TFT at the active region has a protective film made of an organic insulation material and the bank insulation film on the protective film; and

each gate driving TFT at the GIP region is formed with a protective film made of the organic insulation material and a bank insulation film formed on the protective film.

12. The organic light emitting display device according to claim 11, wherein the out-gassing blocking holes comprise:

a first contact hole between the protective film on each pixel driving TFT and the protective film on each gate driving TFT; and

a second contact hole between the bank insulation film formed on the pixel driving TFT and the bank insulation film on the gate driving TFT.

13. The organic light emitting display device according to claim 9, wherein each of the protective film and the bank insulation film is made of the organic insulation material, the protective film is made of a photo-acrylic material, and the bank insulation film is made of a polyimide material.

14. The organic light emitting display device according to claim 7, further comprising:

a connection electrode between the base voltage line and the cathode,

wherein the base voltage is supplied from the base voltage line to the cathode of each organic luminescent element through the connection electrode.

15. A method for manufacturing an organic light emitting display device which includes an organic light emitting display panel including an active region which includes pixel driving TFTs for embodying an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light, a GIP region which includes a gate driver formed with a plurality of gate driving TFTs for respectively driving gate lines of the active region, a GND region formed between the GIP region and the active region to be formed with a base voltage line for supplying base voltage to the organic luminescent elements of the active region, and a sealant region formed with a sealant for attaching an upper substrate to a lower substrate, and a data driver for driving data lines of the organic light emitting display panel, the method for manufacturing the organic light emitting display device comprising:

providing the pixel driving TFTs on a substrate of the active region and the gate driving TFTs on a substrate of the GIP region;

forming first protective films on each pixel driving TFT and each gate driving TFT, respectively, so as to form a first contact hole between the first protective film formed on the pixel driving TFT and the first protective film formed on the gate driving TFT;

forming a second protective film on the pixel driving TFT so as to form a second contact hole between the second protective film formed on the pixel driving TFT and the first protective film formed on the gate driving TFT; and

forming bank insulation films on the respective pixel driving TFT and gate driving TFT so as to form a third contact hole between the bank insulation film formed on the pixel driving TFT and the bank insulation film formed on the gate driving TFT, thereby providing out-gassing blocking holes comprised of the first to third contact holes.

16. The method for manufacturing the organic light emitting display device according to claim 15, wherein the first protective film is made of the inorganic insulation material, each of the second protective film and the bank insulation film is made of the organic insulation material, the second protective film is made of a photo-acrylic material, and the bank insulation film is made of a polyimide material.

17. The method for manufacturing the organic light emitting display device according to claim 16, wherein each of the organic luminescent elements is provided by:

forming, after formation of the first contact hole, an anode connected with a drain electrode of each pixel driving TFT and a connection electrode on the first contact hole in order to connect the base voltage line and the anode;

forming a spacer on the bank insulation film after formation of the bank insulation film or simultaneously with formation of the bank insulation film; and

forming an organic layer and a cathode on the spacer.

18. A method for manufacturing an organic light emitting display device which includes an organic light emitting display panel including an active region which includes pixel driving TFTs for embodying an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light, a GIP region which includes a gate driver formed with a plurality of gate driving TFTs for respectively driving gate lines of the active region, a GND region formed between the GIP region and the active region to be formed with a base voltage line for supplying base voltage to the organic luminescent elements of the active region, and a sealant region formed with a sealant for attaching an upper substrate to a lower substrate, and a data driver for driving data lines of the organic light emitting display panel, the method for manufacturing the organic light emitting display device comprising:

providing the pixel driving TFTs on a substrate of the active region and the gate driving TFTs on a substrate of the GIP region;

forming first protective films on each pixel driving TFT and each gate driving TFT, respectively, so as to form a first contact hole between the first protective film formed on the pixel driving TFT and the first protective film formed on the gate driving TFT;

forming second protective films on the respective pixel driving TFT and gate driving TFT so as to form a second contact hole between the second protective film formed on the pixel driving TFT and the second protective film formed on the gate driving TFT; and

forming bank insulation films on the respective pixel driving TFT and gate driving TFT so as to form a third contact hole between the bank insulation film formed on the pixel driving TFT and the bank insulation film formed on the gate driving TFT, thereby providing out-gassing blocking holes comprised of the first to third contact holes.

19. The method for manufacturing the organic light emitting display device according to claim 18, wherein the first protective film is made of the inorganic insulation material, each of the second protective film and the bank insulation film is made of the organic insulation material, the second protective film is made of a photo-acrylic material, and the bank insulation film is made of a polyimide material.

20. The method for manufacturing the organic light emitting display device according to claim 19, wherein each of the organic luminescent elements is provided by:

forming, after formation of the first contact hole, an anode connected with a drain electrode of each pixel driving TFT and a connection electrode on the first contact hole in order to connect the base voltage line and the anode;

forming a spacer on the bank insulation film after formation of the bank insulation film or simultaneously with formation of the bank insulation film; and

forming an organic layer and a cathode on the spacer, and

wherein the cathode and connection electrode are formed up to the GIP region.

21. An organic light emitting display device including an organic light emitting display panel and a data driver for driving data lines of the organic light emitting display panel, wherein the organic light emitting display panel comprises:

an active region which includes pixel driving TFTs for embodying an image and organic luminescent elements respectively connected with the pixel driving TFTs to emit light;

a GIP region which includes a gate driver formed with a plurality of gate driving TFTs for respectively driving gate lines of the active region;

an out-gassing blocking region formed between the GIP region and the active region so as to block out-gassing occurring from the GIP region;

a GND region formed with a base voltage line for supplying base voltage to the active region; and

a sealant region formed with a sealant for attaching an upper substrate to a lower substrate.

22. The organic light emitting display device according to claim 21, wherein each of the pixel driving TFTs and each of the gate driving TFTs are formed with protective films, respectively.

23. The organic light emitting display device according to claim 22, wherein the out-gassing blocking region is formed with out-gassing blocking holes for blocking the out-gassing occurring from the GIP region, and each of the out-gassing blocking holes is defined between the protective film formed on each pixel driving TFT and the protective film formed on each gate driving TFT.