Organic light emitting diode display device

Patent metadata

Field	Value
Publication number	US-11011732-B2
Application number	US-201816148274-A
Country	US
Kind code	B2
Filing date	Oct 1, 2018
Priority date	Oct 31, 2017
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

An organic light emitting diode display device includes a substrate having a plurality of subpixels which each have an emission region and a non-emission region defined along an edge of the emission region. A reflective barrier is disposed to correspond to the non-emission region and includes a reflective side surface. An overcoat layer is disposed on an upper portion of the reflective barrier. A light emitting diode includes a first electrode, an organic light emitting layer, and a second electrode, which are sequentially disposed on the overcoat layer. The reflective side surface of the reflective barrier is inversely tapered such that a width thereof is decreased in a traveling direction of light emitted from the organic light emitting layer.

First claim

What is claimed is:

1. An organic light emitting diode display, comprising:
a substrate having a plurality of subpixels, a driving thin film transistor is provided in each of the subpixels, each of the subpixels including an emission region and a non-emission region defined along an edge of the emission region;
a reflective barrier disposed on the driving thin film transistor, the reflective barrier disposed to correspond to the non-emission region and including a reflective side surface, the reflective barrier having a height between an upper surface and a lower surface and having a width that decreases along the height from the upper surface to the lower surface;
an overcoat layer disposed on and contacting the reflective barrier; and
a light emitting diode including a first electrode, that is disposed on the overcoat layer and the reflective barrier and is in contact with the overcoat layer, an organic light emitting layer, and a second electrode, the organic light emitting layer and the second electrode being sequentially disposed on the first electrode,
wherein the overcoat layer is disposed between the reflective barrier and the first electrode in a vertical direction, and wherein the reflective barrier is disposed between the first electrode and the substrate in the vertical direction, and
wherein light emitted from the organic light emitting layer passes through the first electrode and the substrate having the driving thin film transistor.

2. The organic light emitting diode display of claim 1 , wherein the reflective barrier has a quadrangular frame shape formed along the edge of the emission region, and including side surfaces formed as the reflective side surface, and the upper surface formed to connect the side surfaces,
wherein a reflective layer is provided on the side surfaces and the upper surface.

3. The organic light emitting diode display of claim 2 , wherein a cross section of the reflective barrier has at least one of an inverse trapezoidal shape or an inverse triangular shape of which a width is gradually increased moving away from the substrate.

4. The organic light emitting diode display of claim 1 , wherein an inverse taper angle defined by the substrate and the reflective side surface is greater than 45° and less than 90°.

5. The organic light emitting diode display of claim 1 , wherein the first electrode is disposed in each of the subpixels, and a bank is disposed along an edge of the first electrode,
wherein a width of the reflective barrier is less than a width of the bank.

6. The organic light emitting diode display of claim 1 , wherein the plurality of subpixels include a red subpixel including a red color filter provided in the emission region, a green subpixel including a green color filter provided in the emission region, and a blue subpixel including a blue color filter provided in the emission region.

7. The organic light emitting diode display of claim 6 , wherein the driving thin film transistor provided in each of the subpixels includes a semiconductor layer, a gate insulating film disposed on an upper portion of the semiconductor layer, a gate electrode disposed on an upper portion of the gate insulating film, a first interlayer insulating film disposed on an upper portion of the gate electrode, and source and drain electrodes disposed on an upper portion of the first interlayer insulating film,
wherein the reflective barrier and the red, green, and blue color filters are disposed on an upper portion of a second interlayer insulating layer disposed on the source and drain electrodes.

8. The organic light emitting diode display of claim 1 , wherein a reflective layer is disposed on the reflective barrier.

9. The organic light emitting diode display of claim 5 , wherein the bank is disposed on the reflective barrier and the first electrode.

10. An organic light emitting diode display, comprising:
a substrate having a plurality of subpixels, each of the subpixels including an emission region and a non-emission region defined along an edge of the emission region;
a reflective barrier disposed to correspond to the non-emission region and including a reflective side surface, the reflective barrier having a height between an upper surface and a lower surface and having a width that decreases along the height from the upper surface to the lower surface;
an overcoat layer disposed on and contacting the reflective barrier; and
a light emitting diode including a first electrode that is disposed on the overcoat layer and is in contact with the overcoat layer, an organic light emitting layer, and a second electrode, the organic light emitting layer and the second electrode being sequentially disposed on the first electrode,
wherein the reflective side surface of the reflective barrier includes a plurality of side surfaces, and
a reflective layer includes a tail that is disposed on at least two side surfaces of the reflective barrier, the tail disposed adjacent to the lower surface of the reflective barrier.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Kang-Ju
• Min Keum-Kyu
• Kim Soo-Kang
• Kim Jin-Tae
• Choi Yong-Hoon

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K50/856 Primary

  comprising reflective means · CPC title

• H10K59/878 Primary

  comprising reflective means · CPC title

• H01L27/3246

  Electricity · mapped topic