Organic light emitting diode display capable of reducing RC load

Patent metadata

Field	Value
Publication number	US-10355069-B2
Application number	US-201715658774-A
Country	US
Kind code	B2
Filing date	Jul 25, 2017
Priority date	Jul 29, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

An organic light emitting diode display includes a substrate; a buffer layer on the substrate; a scan line running to a horizontal direction on the buffer layer; an intermediate insulating layer covering the scan line; a first trench having a segment shape apart from the scan line with a predetermined distance and exposing some of the substrate by patterning the intermediate insulating layer and the buffer layer; a data line running to a vertical direction on the substrate exposed by the first trench and on the intermediate insulating layer; a passivation layer covering the data line and the scan line; and a color filter filling into the trench and depositing on the passivation layer.

First claim

What is claimed is:

1. An organic light emitting diode display, comprising:
a substrate;
a buffer layer on the substrate;
a scan line running in a horizontal direction on the buffer layer;
an intermediate insulating layer covering the scan line;
a first trench having a segment shape apart from the scan line with a predetermined distance, and exposing some of the substrate by patterning the intermediate insulating layer and the buffer layer;
a data line running in a vertical direction on the substrate exposed by the first trench and on the intermediate insulating layer;
a passivation layer covering the data line and the scan line;
a color filter filling the trench and deposited on the passivation layer; and
a driving current line parallel with the data line, and running in a vertical direction on the some of the substrate exposed by the first trench and on the intermediate insulating layer,
wherein the passivation layer covers the driving current line.

2. The device according to the claim 1 , further comprising:
a second trench having a segment shape apart from the scan line with a predetermined distance and exposing some of the substrate by patterning the intermediate insulating layer and the buffer layer.

3. The device according to the claim 2 , further comprising:
a pixel area defined by the scan line, the data line and the driving current line;
an overcoat layer covering the most of the substrate on the color filter;
an anode electrode disposed within the pixel area on the overcoat layer;
a bank defining an emission area within the anode electrode;
an organic light emitting layer covering the anode electrode and the bank; and
a cathode electrode deposited on the organic light emitting layer.

4. The device according to the claim 3 , further comprising:
a switching thin film transistor connected between the scan line and the data line; and
a driving thin film transistor connected between the driving current line and the switching thin film transistor,
wherein the anode electrode is connected to the driving thin film transistor.

5. The device according to the claim 3 , wherein the passivation layer, the color filter, the overcoat layer, the bank and the organic light emitting layer are stacked between the data line and the cathode electrode.

6. The device according to the claim 3 , wherein the data line is running to a vertical direction,
wherein the data line is buried into the trench, and is disposed on the intermediate insulating layer where the data line is overlapped with the scan line, and
wherein a first distance between the data line and the cathode electrode at a first location where the trench is disposed is thicker than a second distance between the data line and the cathode electrode at a second location where the data line is overlapped the scan line, the thickness difference is corresponding to a depth of the trench.

7. The device according to the claim 2 , wherein the color filter fills into the trench and is disposed as overlapped with the anode electrode, the data line and the driving current line.

8. The device according to the claim 7 , wherein the color filter has a first thickness over the trench is thicker than a second thickness under the anode electrode, and
wherein a difference between the first thickness and the second thickness is corresponding to a depth of the trench.

9. The device according to the claim 1 , wherein a plurality of the scan lines are arrayed with a predetermined distance from each other, and
wherein the trench has a segment shape running in the vertical direction between two neighboring two scan lines, and
wherein a plurality of the trenches are disposed along to the data line.

10. The device according to the claim 1 , wherein each of a width of the data line and a width of the driving current line is smaller than a width of the trench.

11. The device according to the claim 10 , wherein the data line and the driving current line are both disposed in the trench.

12. The device according to the claim 1 , wherein the driving current line is in direct contact with the substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Dosung
• Tani Ryosuke

Classifications

• H01L27/3262

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L2251/533

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L2251/558

  Electricity · mapped topic