Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-10852863-B2
Application number	US-201916385987-A
Country	US
Kind code	B2
Filing date	Apr 16, 2019
Priority date	Apr 18, 2018
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

An organic light emitting display device includes a display panel and a touch screen. The display panel includes a display region that includes a light emitting region and a peripheral region surrounding the light emitting region, a pad region spaced apart from the display region, and a bending region located between the display region and the pad region. The touch screen is positioned on the display panel and includes a plurality of touch screen electrodes and an organic insulation structure. The plurality of touch screen electrodes is located in the display region. The organic insulation structure is positioned to cover the plurality of touch screen electrodes in the display region, and extends in a first direction from the display region into the bending region and the pad region.

First claim

What is claimed is:

1. An organic light emitting display (“OLED”) device, comprising:
a display panel comprising a display region that comprises a light emitting region and a peripheral region around the light emitting region, a pad region spaced from the display region, and a bending region between the display region and the pad region; and
a touch screen on the display panel, the touch screen comprising:
a plurality of touch screen electrodes in the display region; and
an organic insulation structure covering the plurality of touch screen electrodes in the display region and extending in a first direction from the display region into the bending region and the pad region,

wherein the display panel further comprises:
a connection electrode in the bending region;
a planarization layer on the connection electrode; and
a pixel defining layer on the planarization layer, and

wherein the planarization layer and the pixel defining layer are disposed between the organic insulation structure and the connection electrode in the bending region.

2. The OLED device of claim 1 , wherein the organic insulation structure is continuous in the display region, the bending region, and a portion of the pad region on the display panel.

3. The OLED device of claim 1 , wherein the plurality of touch screen electrodes comprises:
a plurality of first touch screen electrodes extending in the first direction and a second direction opposite to the first direction, the plurality of first touch screen electrodes being spaced from each other in a third direction crossing the first and second directions; and
a plurality of second touch screen electrodes on the plurality of first touch screen electrodes, the plurality of second touch screen electrodes extending in the third direction and being spaced from each other in the first and second directions,
wherein the plurality of first touch screen electrodes crosses the plurality of second touch screen electrodes.

4. The OLED device of claim 3 , wherein the organic insulation structure comprises:
a first organic insulation layer covering the plurality of first touch screen electrodes and extending in the first direction; and
a second organic insulation layer on the first organic insulation layer, the second organic insulation layer covering the plurality of second touch screen electrodes and extending in the first direction.

5. The OLED device of claim 4 , wherein the organic insulation structure further comprises:
a third organic insulation layer under the plurality of first touch screen electrodes and the first organic insulation layer.

6. The OLED device of claim 5 , wherein the first, second, and third organic insulation layers each independently consist essentially of organic materials.

7. The OLED device of claim 5 , wherein the second organic insulation layer has a first thickness in the light emitting region and a second thickness in the bending region, the second thickness being greater than the first thickness.

8. The OLED device of claim 7 , wherein the second thickness of the second organic insulation layer is such that a neutral plane of the display panel in the bending region is raised.

9. The OLED device of claim 1 , wherein the plurality of touch screen electrodes comprises:
a plurality of first touch screen electrodes extending in the first direction and a second direction opposite to the first direction, the plurality of first touch screen electrodes being spaced from each other in a third direction crossing the first and second directions;
a plurality of second touch screen electrodes at a same layer level with the plurality of first touch screen electrodes, the plurality of second touch screen electrodes being spaced from each other in the first and second directions, each of the plurality of second touch screen electrodes being between adjacent two of the plurality of first touch screen electrodes; and
a plurality of connection patterns at a different layer level than the plurality of first and second touch screen electrodes, the plurality of connection patterns respectively electrically connecting adjacent two of the plurality of second touch screen electrodes in the third direction.

10. The OLED device of claim 9 , wherein the organic insulation structure includes:
a first organic insulation layer covering the plurality of first and second touch screen electrodes and extending in the first direction; and
a second organic insulation layer on the first organic insulation layer, the second organic insulation layer covering the plurality of connection patterns and extending in the first direction.

11. The OLED device of claim 10 , wherein the organic insulation structure further comprises:
a third organic insulation layer under the plurality of first touch screen electrodes and the first organic insulation layer,
wherein the first, second, and third organic insulation layers each independently consist essentially of organic materials.

12. The OLED device of claim 1 , wherein the display panel further comprises:
a substrate;
a semiconductor element on the substrate;
a light emitting structure in the light emitting region on the substrate; and
a thin film encapsulation structure on the light emitting structure.

13. The OLED device of claim 12 , wherein the semiconductor element comprises:
an active layer on the substrate;
a gate insulation layer covering the active layer on the substrate and extending in the first direction;
a gate electrode on the active layer;
an insulating interlayer covering the gate electrode on the gate insulation layer and extending in the first direction; and
source and drain electrodes on the gate electrode.

14. The OLED device of claim 13 , wherein the gate insulation layer has a first opening exposing an upper surface of the substrate in the bending region, and the insulating interlayer has a second opening exposing the upper surface of the substrate in the bending region.

15. The OLED device of claim 12 , wherein the light emitting structure comprises:
a lower electrode;
a light emitting layer on the lower electrode; and
an upper electrode on the light emitting layer, and
wherein the thin film encapsulation structure comprises:
a first thin film encapsulation layer comprising one or more inorganic materials having flexibility;
a second thin film encapsulation layer on the first thin film encapsulation layer, the second thin film encapsulation layer comprising one or more organic materials having flexibility; and
a third thin film encapsulation layer on the second thin film encapsulation layer, the third thin film encapsulation layer comprising one or more inorganic materials having flexibility.

16. The OLED device of claim 15 , wherein the touch screen is directly on the thin film encapsulation structure.

17. The OLED device of claim 12 ,
wherein the connection electrode is disposed between the organic insulation structure of the touch screen and the substrate, the connection electrode electrically connects the light emitting structure and an external device.

18. The OLED device of claim 17 , further comprising:
a lower protection film on a lower surface of the display panel, opposite from the touch screen;
a polarizing layer on the touch screen; and
a window substrate on the polarizing layer.

19. The OLED device of claim 18 , wherein the lower protection film comprises:
a first lower protection film pattern in the display region; and
a second lower protection film pattern in the pad region,
wherein the

Assignees

• Samsung Display Co Ltd

Inventors

• Hong Jung-Moo
• Kim Kyungseop
• Park Sungkyun
• Shim Jinbo
• Han Sang Youn

Classifications

• H10K59/873

  Encapsulations · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H10K59/40 Primary

  OLEDs integrated with touch screens · CPC title