Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-11217769-B2
Application number	US-201715465520-A
Country	US
Kind code	B2
Filing date	Mar 21, 2017
Priority date	Aug 12, 2016
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

An organic light emitting display device includes a flexible display panel having a display region where a plurality of pixels are disposed and a pad region where pad electrodes that are electrically connected to an external device are disposed, the pad region being located at a side of the display region, the display panel being configurable to have a curved shape where a flexible portion of the display region is bent, an upper structure in the display region of the display panel, and a lower protection film on a lower surface of the display panel, and including an adhesive layer and a protection layer. The adhesive layer is in direct contact with the lower surface of the display panel, and includes an antistatic material. The protection layer is disposed under the adhesive layer.

First claim

What is claimed is:

1. An organic light emitting display (OLED) device, comprising:
a display panel having a display region where a plurality of pixels are disposed and a pad region where pad electrodes that are electrically connected to an external device are disposed, the pad region located at a side of the display region, the display panel being configurable to have curved shape where a flexible portion of the display region is bent;
an upper structure in the display region of the display panel; and
a lower protection film on a lower surface of the display panel, the lower protection film comprising:
an adhesive layer in direct contact with the lower surface of the display panel, the adhesive layer including an antistatic material; and
a protection layer under the adhesive layer,

wherein the pad region comprises:
a bending region located in a first portion of the pad region that is adjacent to the display region; and
a pad electrode region where the pad electrodes are disposed in a second portion of the pad region,

wherein the lower protection film comprises:
a first lower protection film pattern disposed in the display region; and
a second lower protection film pattern disposed in the pad electrode region of the pad region such that the portion of the lower surface of the display panel that is located in the bending region is exposed, and

wherein the antistatic material is included in the first lower protection film pattern, and the second lower protection film pattern does not include the antistatic material.

2. The OLED device of claim 1 , wherein the display region comprises:
a first sub-display region located in a center of the display region, the first sub-display region having opposed lateral portions;
second and third sub-display regions, with the second sub-display region located at one of the opposed lateral portions of the first sub-display region and the third sub-display region located at the other opposed lateral portion, the second and third sub-display regions being configured to have a shape that is bent on an axis with respect to a second direction, the second direction being perpendicular to a first direction;
a fourth sub-display region located adjacent to the second sub-display region, the fourth sub-display region extending in a third direction that is orthogonal to both the first direction and the second direction; and
a fifth sub-display region located adjacent to the third sub-display region, the fifth sub-display region extending in the third direction.

3. The OLED device of claim 2 , wherein the second and fourth sub-display regions and the third and fifth sub-display regions are symmetrical to each other with respect to the first sub-display region.

4. The OLED device of claim 2 , wherein the display region comprises:
a light emitting region configured to emit light; and
a peripheral region surrounding the light emitting region,
wherein the first sub-display region, the second sub-display region, and the third sub-display region are located in the light emitting region, and the fourth sub-display region and the fifth sub-display region are located in the peripheral region.

5. The OLED device of claim 4 , wherein the adhesive layer is disposed under the substrate that is located in the first, second, third, fourth, and fifth sub-display regions or under substantially the entire substrate that is located in the first, second, third, fourth, and fifth sub-display regions.

6. The OLED device of claim 5 , wherein a neutral plane of the adhesive layer and the protection layer, the display panel, and an upper structure in the second and third sub-display regions is located within the display panel.

7. The OLED device of claim 6 , wherein a thickness of the adhesive layer is in a range between about 11 and about 15 micrometers, and a thickness of the protection layer is in a range between about 74 and about 76 micrometers.

8. The OLED device of claim 4 , further comprising a plurality of wirings disposed in the peripheral region.

9. The OLED device of claim 1 , wherein the pad electrode region and the bending region are defined as a pad region, and wherein the bending region is located in a first portion of the pad region that is adjacent to the display region, and
the pad electrode region is located in a second portion of the pad region.

10. The OLED device of claim 9 , further comprising:
a bending protection layer in a portion of the display region, the bending region, and a portion of the pad electrode region; and
connection electrodes between the bending protection layer and the substrate, the connection electrodes electrically connecting the pixels and the pad electrodes.

11. The OLED device of claim 9 , wherein the first lower protection film pattern and the second lower protection film pattern are spaced apart from each other.

12. The OLED device of claim 9 , wherein the second lower protection film pattern is disposed on a lower surface of the first lower protection film pattern.

13. The OLED device of claim 12 , wherein a bending radius of the bending region is less than a bending radius of a portion of the display region where the display region is bent.

14. The OLED device of claim 9 , wherein the lower protection film defines a groove in the bending region.

15. The OLED device of claim 9 , wherein the display panel further includes:
a semiconductor element on the substrate;
a lower electrode on the semiconductor element;
a light emitting layer on the lower electrode;
an upper electrode on the light emitting layer; and
a thin film encapsulation structure on the upper electrode.

16. The OLED device of claim 15 , wherein the semiconductor element includes:
an active layer on the substrate;
a gate insulation layer on the active layer;
a gate electrode on the gate insulation layer;
an insulating interlayer on the gate electrode, the gate insulation layer and the insulating interlayer defining an opening that exposes an upper surface of the substrate that is located in the bending region; and
source and drain electrodes on the insulating interlayer.

17. The OLED device of claim 15 , wherein an upper structure includes a touch screen electrode layer and a polarizing layer on the thin film encapsulation structure.

18. The OLED device of claim 17 , wherein the polarizing layer is disposed on the touch screen electrode layer.

19. The OLED device of claim 17 , wherein the touch screen electrode layer is disposed on the polarizing layer.

20. The OLED device of claim 1 , wherein a thickness of the protection layer is greater than a thickness of the adhesive layer, and the thickness of the adhesive layer is greater than a thickness of the antistatic layer.

21. The OLED device of claim 1 , wherein a surface resistance of an upper surface of the adhesive layer that is in direct contact with the display panel is less than about 1×10 11 ohm/sq.

22. The OLED device of claim 1 , wherein a weight ratio of the antistatic material based on a total weight of the adhesive layer is in a range between about 1 wt % and about 3 wt %.

23. The OLED device of claim 1 , wherein the protection layer further includes a light blocking material.

24. The OLED device of claim 23 , wherein the light blocking material comprises at least one material selected from the group consisting of carbon black, titanium nitride oxide, titanium black, phenylene black, aniline black, cyanine black, and ni

Assignees

• Samsung Display Co Ltd

Inventors

• Kishimoto Hirotsugu
• Kim Jung-Su
• Na Eun-Jae
• Shin Dong-Myung

Classifications

• H10W42/60 Primary

  protecting against electrostatic charges or discharges, e.g. Faraday shields (integrated devices comprising arrangements for electrical protection H10D89/60) · CPC title

• H10K50/865

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K50/868

  Arrangements for polarized light emission (H10K50/86 takes precedence) · CPC title

• H10K50/8426

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/126

  Shielding, e.g. light-blocking means over the TFTs · CPC title