Display panel and method of manufacturing the same

• US 9,401,389 B2
• Filed: 10/22/2014
• Issued: 07/26/2016
• Est. Priority Date: 02/14/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Cho, Se-Il
• Primary Examiner(s): Raleigh, Donald
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US14/521,313
• Publication Number:
  US 20150236080A1
• Time in Patent Office: 643 Days
• Field of Search: 313498-512, 313/609, 313/292, 313/582
• US Class Current: 1/1
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/8723 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

A display panel and a method of manufacturing the same are disclosed. In one aspect, the display panel comprises a first substrate, a switching element formed over the first substrate, a planarization insulating layer having a via hole that at least partially exposes the switching element, and a light-emitting structure including a first electrode connected to the switching element through the via hole. The display panel also includes a spacer having a trench configured to alter the path of external light reflected off the light-emitting structure, wherein the spacer at least partially covers the first electrode and the planarization insulating layer. The display panel further includes a second substrate formed over the spacer, wherein the spacer is interposed between the first and second substrates.

Claims

1. A display panel, comprising:

a first substrate;

a switching element formed over the first substrate;

a planarization insulating layer having a via hole that at least partially exposes the switching element;

a light-emitting structure including a first electrode connected to the switching element through the via hole;

a spacer having a trench overlapping the via hole in the depth dimension of the display panel, wherein the spacer at least partially covers the first electrode and the planarization insulating layer; and

a second substrate formed over the spacer and the light-emitting structure, wherein the spacer is interposed between the first and second substrates, and wherein the spacer is in direct physical contact with the second substrate.

2. The display panel of claim 1, wherein the trench is formed in a contact region in which the switching element contacts the first electrode.

3. The display panel of claim 2, wherein the trench is linear and has a predetermined width.

4. The display panel of claim 3, wherein the width of the trench is less than the width of the contact region.

5. The display panel of claim 4, wherein the trench is located a predetermined distance away from a boundary line of the contact region, and wherein the boundary line is formed between the trench and the remaining portion of the spacer.

6. The display panel of claim 2, wherein the trench is formed in an island shape having a predetermined area when viewed from the light-emitting side of the display panel.

7. The display panel of claim 6, wherein the area of the trench is smaller than the area of the contact region when viewed from the light-emitting side of the display panel.

8. The display panel of claim 1, wherein the trench is dented from a surface of the spacer by a predetermined depth and does not expose the first electrode.

9. The display panel of claim 1, wherein the trench is formed directly above at least a portion of the first electrode.

10. The display panel of claim 1, wherein the spacer is dome shaped.

11. A display panel, comprising:

a first substrate;

a planarization insulating layer formed over the first substrate and including a via hole;

a light-emitting structure including a first electrode;

a spacer formed over a portion of the light-emitting structure, wherein a trench is defined in the spacer and overlaps the via hole in the depth dimension of the display panel; and

a second substrate formed over the spacer and the light-emitting structure, wherein the spacer is in direct physical contact with the second substrate.

12. The display panel of claim 11, further comprising a switching element formed over the first substrate, wherein the first electrode contacts the portion, and wherein the trench is formed in a contact region in which the first electrode contacts the portion.

13. The display panel of claim 12, wherein the trench is substantially linear and has a predetermined width.

14. The display panel of claim 12, wherein the trench is formed in an island shape having a predetermined area when viewed from the light-emitting side of the display panel.

15. The display panel of claim 11, wherein the trench is dented from a surface of the spacer by a predetermined depth and does not expose the first electrode.

16. The display panel of claim 11, further comprising a pixel definition layer substantially surrounding the light-emitting structure, wherein the spacer and the pixel definition layer are formed of different materials.

17. The display panel of claim 11, further comprising a pixel definition layer substantially surrounding the light-emitting structure, wherein the spacer and the pixel definition layer are formed of the same material.