Organic light emitting display and method for manufacturing the same

• US 9,130,181 B2
• Filed: 12/18/2012
• Issued: 09/08/2015
• Est. Priority Date: 08/31/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Choi, Ho-Won, Lee, Jae-Do
• Primary Examiner(s): ZHU, SHENG-BAI
• Application Number:
  US13/718,391
• Publication Number:
  US 20140061597A1
• Time in Patent Office: 994 Days
• Field of Search: 257/40, 257/91, 257/E21.001, 438/29, 438/23
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H10K 30/87 Light-trapping means
• CPC Class Codes: H10K 50/805 Electrodes
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/80 using temporary substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

Disclosed are an organic light emitting display that has a configuration excluding a polarizing plate and exhibits improved flexibility and visibility, and a method for manufacturing the same, the organic light emitting display includes a touch electrode array facing the organic light emitting diode on the second buffer layer, the touch electrode array including first and second touch electrodes intersecting each other and an exterior light shielding layer including at least a color filter layer, an adhesive layer formed between the organic light emitting diode and the touch electrode array.

Claims

1. An organic light emitting display comprising:

a film substrate;

a first buffer layer on the film substrate;

a thin film transistor in each of a plurality of pixels on the first buffer layer;

an organic light emitting diode connected to a thin film transistor of each pixel;

a protective layer on the organic light emitting diode and the thin film transistor;

an adhesive layer on the protective layer;

first and second touch electrodes and an exterior light shielding layer on the adhesive layer;

a second buffer layer on the touch electrodes and the exterior light shielding layer; and

a cover glass on the second buffer layer, wherein at least one of the first and second touch electrodes, and the exterior light shielding layer is in direct contact with the adhesive layer and adhered to the protective layer via the adhesive layer.

2. The organic light emitting display according to claim 1, wherein the exterior light shielding layer further comprises at least of a color filter layer and a black maxtrix layer.

3. The organic light emitting display according to claim 1, wherein the exterior light shielding layer is disposed on the first touch electrode.

4. The organic light emitting display according to claim 1, wherein the first and second touch electrodes are disposed on the exterior light shielding layer.

5. The organic light emitting display according to claim 2, wherein the black matrix layer and the color filter layer are disposed in the same layer.

6. The organic light emitting display according to claim 2, wherein the black matrix layer and the color filter layer are disposed in different layers.

7. The organic light emitting display according to claim 1, wherein the first buffer layer and the second buffer layer have a laminate structure comprising a plurality of inorganic films.

8. The organic light emitting display according to claim 1, further comprising a first etch stopper film between the rear surface of the first buffer layer and the film substrate and, a second etch stopper film between the rear surface of the second buffer layer and the cover glass.

9. The organic light emitting display according to claim 8, wherein the first etch stopper film and the second etch stopper film comprise one of polyimide or photoacryl.

10. The organic light emitting display according to claim 1, wherein the organic light emitting diode comprises a bank comprising a black matrix corresponding to the edge of each pixel.

11. The organic light emitting display according to claim 2, wherein the first touch electrode is disposed in a first direction and comprises a plurality of first electrode patterns, each having an island shape and a metal bridge to electrically connect adjacent first electrode patterns, and

the second touch electrode is disposed in a direction intersecting the first direction, and comprises a plurality of second electrode patterns, each having the same shape as each of the first electrode patterns and a connection pattern to connect adjacent second electrode patterns, integrated with the second electrode patterns.

12. The organic light emitting display according to claim 11, wherein the plurality of first electrode patterns, the plurality of second electrode patterns and the connection patterns are formed as the same transparent electrode in a first layer,

the metal bridge is formed in a second layer on a first interlayer insulating film interposed between the first layer and the second layer, and

the first interlayer insulating film comprises a contact hole formed in a region where the metal bridge overlaps the adjacent first electrode patterns.

13. The organic light emitting display according to claim 12, further comprising:

a second interlayer insulating film on the first interlayer insulating film including the plurality of first and second electrode pattern, and a common transparent electrode pattern covering the second interlayer insulating film, the plurality of first and second electrode patterns and the connection pattern.

14. The organic light emitting display according to claim 12, wherein both of the black matrix layer and the color filter layer comprise the first interlayer insulating films or the second interlayer insulating films.

15. The organic light emitting display according to claim 12, wherein one of the black matrix layer and the color filter layer is comprised in the first interlayer insulating film and the other is comprised in the second interlayer insulating film.

16. The organic light emitting display according to claim 12, wherein the black matrix layer and the color filter layer are disposed under the metal bridge.

17. The organic light emitting display according to claim 13, wherein the black matrix layer and the color filter layer are on the common transparent electrode pattern.

18. The organic light emitting display according to claim 1, wherein the organic light emitting diode comprises:

first and second electrodes facing each other; and

a light emitting layer between layers of the first and second electrodes.

19. The organic light emitting display according to claim 18, wherein the color filter layer of each pixel comprises a color filter that transmits light having the same color as light emitted from the light emitting layer in each pixel.