Organic Light Emitting Diode Display

• US 20120097927A1
• Filed: 07/19/2011
• Published: 04/26/2012
• Est. Priority Date: 10/22/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Shin, Hyea-Weon
• Granted Patent: US 8,653,511 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks

Abstract

An organic light emitting diode (OLED) display may be constructed with a substrate; a first electrode formed on the substrate; a barrier rib formed on the substrate and having an opening exposing the first electrode; an organic emission layer formed on the first electrode; and a second electrode formed on the organic emission layer. The barrier rib includes an isolating groove formed between organic emission layers of neighboring pixels. Accordingly, in the organic light emitting diode (OLED) display, the isolating groove is formed at the barrier rib such that ink is prevented from crossing over the barrier rib and flowing into a neighboring pixel without a hydrophobic surface treatment of the barrier rib.

Claims

1. An organic light emitting diode (OLED) display, comprising:

a substrate;

a first electrode formed on the substrate;

a barrier rib formed on the substrate and having an opening exposing the first electrode;

an organic emission layer formed on the first electrode; and

a second electrode formed on the organic emission layer;

wherein the barrier rib includes an isolating groove formed between the organic emission layer and organic emission layers of neighboring pixels.

2. The organic light emitting diode (OLED) display of claim 1, wherein the isolating groove is formed by being depressed from the surface of the barrier rib.

3. The organic light emitting diode (OLED) display of claim 2, wherein the isolating groove has a step shape.

4. The organic light emitting diode (OLED) display of claim 3, wherein a side surface of the isolating groove undergoes a hydrophilic surface treatment.

5. The organic light emitting diode (OLED) display of claim 1, wherein the isolating groove penetrates from a top surface of the barrier rib to a bottom surface of the barrier rib.

6. The organic light emitting diode (OLED) display of claim 5, wherein the isolating groove has a step shape.

7. The organic light emitting diode (OLED) display of claim 6, wherein a side surface of the isolating groove undergoes a hydrophilic surface treatment.

8. The organic light emitting diode (OLED) display of claim 1, wherein the organic emission layer is formed at the opening of the barrier rib.

9. The organic light emitting diode (OLED) display of claim 8, wherein the opening of the barrier rib has a step shape.

10. The organic light emitting diode (OLED) display of claim 9, further comprising an assistance barrier rib positioned between the substrate and the barrier rib, wherein a portion of the assistance barrier rib is exposed through the opening of the barrier rib.

11. The organic light emitting diode (OLED) display of claim 1, wherein the second electrode is formed inside the isolating groove.

12. The organic light emitting diode (OLED) display of claim 1, wherein the second electrode is not formed inside the isolating groove.