ORGANIC LIGHT-EMITTING DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

• US 20150028292A1
• Filed: 10/23/2013
• Published: 01/29/2015
• Est. Priority Date: 07/25/2013
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kang, Yoon-Ho
• Application Number:
  US14/061,624
• Publication Number:
  US 20150028292A1
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/233 by photolithographic etching

Abstract

An organic light-emitting display device includes a thin film transistor, a planarization layer on the thin film transistor and having an integral pixel sectioning portion defining a boundary of a pixel area, a pixel electrode connected to the thin film transistor in the pixel area inside the pixel sectioning portion, a light-emitting layer on the pixel electrode, and an opposite electrode on the light emitting layer.

Claims

1. An organic light-emitting display device, comprising:

a thin film transistor;

a planarization layer on the thin film transistor and comprising an integral pixel sectioning portion defining a boundary of a pixel area;

a pixel electrode in the pixel area inside the pixel sectioning portion and connected to the thin film transistor;

a light-emitting layer on the pixel electrode; and

an opposite electrode on the light emitting layer.

2. The organic light-emitting display device of claim 1, wherein the planarization layer is a lyophobic organic layer.

3. The organic light-emitting display device of claim 1, wherein the light-emitting layer is formed by inkjet printing.

4. A method of manufacturing an organic light-emitting display device, the method comprising:

forming a thin film transistor on a substrate;

forming a planarization layer on the thin film transistor;

patterning the planarization layer to form a pixel sectioning portion defining a boundary of a pixel area;

forming a pixel electrode in the pixel area inside the pixel sectioning portion, the pixel electrode being connected to the thin film transistor;

forming a light-emitting layer on the pixel electrode; and

forming an opposite electrode on the light-emitting layer.

5. The method of claim 4, wherein the planarization layer is a lyophobic organic layer.

6. The method of claim 4, wherein the light-emitting layer is formed by inkjet printing.

7. The method of claim 4, wherein the patterning the planarization layer comprises etching a portion of the planarization layer corresponding to the pixel area, and not etching a portion of the planarization layer corresponding to the pixel sectioning portion.

8. The method of claim 4, wherein the pixel electrode is formed by deposition or inkjet printing.