Organic light emitting diode display

• US 9,818,807 B2
• Filed: 09/30/2015
• Issued: 11/14/2017
• Est. Priority Date: 01/14/2015
• Status: Expired

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Dong-Seop
• Primary Examiner(s): Trinh, Michael
• Application Number:
  US14/871,867
• Publication Number:
  US 20160204373A1
• Time in Patent Office: 776 Days
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• 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 59/873 Encapsulations
• CPC Class Codes: H10K 59/88 Dummy elements, i.e. elements having non-functional features

Abstract

There is provided an organic light emitting diode display including: a substrate having a pixel area and a surrounding area enclosing the pixel area; an OLED formed in the pixel area; an anti-overflowing groove formed in the surrounding area of the substrate; and a dam positioned between the anti-overflowing groove and an end of the substrate.

Claims

1. An OLED display, comprising:

a substrate having a pixel area and a surrounding area enclosing the pixel area;

an OLED formed in the pixel area;

an anti-overflowing groove formed in the surrounding area of the substrate; and

a dam positioned between the anti-overflowing groove and an end of the substrate,

a semiconductor formed in the pixel area;

a gate insulating layer formed on the semiconductor and the substrate;

a gate electrode formed on the gate insulating layer;

a first interlayer insulating layer formed on the gate electrode and the gate insulating layer;

a source electrode and a drain electrode formed on the first interlayer insulating layer;

a second interlayer insulating layer formed on the source electrode and a drain electrode; and

a pixel defined layer having an opening which is formed on the second interlayer insulating layer and exposes the first electrode,

wherein the anti-overflowing groove is formed through the first interlayer insulating layer and exposes the gate insulating layer,

wherein the OLED includes;

a first electrode formed on the second interlayer insulating layer;

an organic light emitting layer formed on the first electrode, and a second electrode formed on the organic emission layer,

and wherein the dam includes a lower layer made of the same material as the second interlayer insulating layer and an upper layer positioned on the lower layer and made of the same material as the pixel defined layer.

2. The OLED display of claim 1, further comprising:

a buffer layer formed on the substrate,

wherein the anti-overflowing groove is formed through the first interlayer insulating layer and the gate insulating layer and exposes the buffer layer.

3. The OLED display of claim 1, wherein:

the dam includes a first dam and a second dam positioned at both sides, having the anti-overflowing groove disposed there between.

4. The OLED display of claim 3, wherein:

the dam further includes a first dam, a second dam, and a third dam having the anti-overflowing groove disposed between the second and third dam.

5. The OLED display of claim 1, further comprising:

an encapsulation layer positioned on the substrate and covering the pixel area,

wherein the encapsulation layer includes at least one inorganic layer and organic layer.

6. The OLED display of claim 1, further comprising:

an anti-crack groove positioned between the dam and the end of the substrate.