Transparent organic light emitting display apparatus and method of manufacturing the same

• US 9,761,651 B2
• Filed: 11/13/2015
• Issued: 09/12/2017
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Chang, Young-Jin, Kim, Mu-Gyeom
• Primary Examiner(s): Kusumakar, Karen
• Assistant Examiner(s): Bowen, Adam S
• Application Number:
  US14/941,299
• Publication Number:
  US 20160293687A1
• Time in Patent Office: 669 Days
• Field of Search: 257 40
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• 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 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/8731 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

A transparent organic light emitting display apparatus include a base substrate, a light blocking pattern disposed on the base substrate, a thin film transistor disposed on the base substrate, a first electrode disposed on the base substrate and electrically connected to the thin film transistor, a pixel defining layer disposed on the base substrate and overlapping the first light blocking pattern, a second electrode disposed on the base substrate, a light emitting structure disposed between the first electrode and the second electrode, and a second light blocking pattern overlapping the first light blocking pattern. The first light blocking pattern defines a first opening. The second light blocking pattern defines a second opening which overlaps the first opening. The pixel defining layer defines a third opening which overlaps the first and second openings configured to pass external light through the first to third openings.

Claims

1. A transparent organic light emitting display apparatus comprising:

a base substrate;

a first light blocking pattern disposed on the base substrate;

a thin film transistor disposed on the base substrate;

a first electrode disposed on the base substrate and electrically connected to the thin film transistor;

a pixel defining layer disposed on the base substrate and overlapping the first light blocking pattern;

a second electrode disposed on the base substrate;

a light emitting structure disposed between the first electrode and the second electrode; and

a second light blocking pattern overlapping the first light blocking pattern,

wherein the first light blocking pattern defines a first opening, the second light blocking pattern defines a second opening which overlaps the first opening, and the pixel defining layer defines a third opening which overlaps the first and second openings configured to pass external light through the first to third openings, and

wherein a width of the second opening is smaller than a width of the third opening.

2. The transparent organic light emitting display apparatus of claim 1, wherein a width of the first opening is smaller than a width of the third opening opening.

3. The transparent organic light emitting display apparatus of claim 1, wherein a width of the first opening is substantially same as the width of the second opening.

4. The transparent organic light emitting display apparatus of claim 1, wherein a gap between a boundary of the first opening and a boundary of the third opening is about 1 μ

m to about 5 μ

m in a plan view, and

a gap between a boundary of the second opening and a boundary of the third opening is about 1 μ

m to about 5 μ

m in a plan view.

5. The transparent organic light emitting display apparatus of claim 4,

wherein the gap between the boundary of the first opening and the boundary of the third opening is uniform.

6. The transparent organic light emitting display apparatus of claim 1, wherein the first light blocking pattern is disposed opposite to the thin film transistor with respect to the base substrate.

7. The transparent organic light emitting display apparatus of claim 1, further comprising a third light blocking pattern disposed on the pixel defining layer and spaced apart from the light emitting structure,

wherein the third light blocking pattern defines a fourth opening which covers a boundary of the third opening and overlaps the first and second openings.

8. The transparent organic light emitting display apparatus of claim 7, wherein a width of the first opening is smaller than a width of the fourth opening, and the width of the second opening is smaller than a width of the fourth opening.

9. The transparent organic light emitting display apparatus of claim 1, further comprising a color filter disposed on the second electrode,

wherein the second light blocking pattern makes contact with the color filter.

10. The transparent organic light emitting display apparatus of claim 9, further comprising a sealing substrate disposed on the color filter and the second light blocking pattern.

11. The transparent organic light emitting display apparatus of claim 1, further comprising a buffer layer covering the base substrate,

wherein the buffer layer is disposed between the base substrate and the thin film transistor, and the first light blocking pattern is disposed between the buffer layer and the base substrate.

12. The transparent organic light emitting display apparatus of claim 11, further comprising a first insulation layer disposed on the buffer layer and a second insulation layer disposed on the first insulation layer,

wherein the first and second insulation layers define an opening where the first to third openings are overlapped each other.

13. The transparent organic light emitting display apparatus of claim 12, further comprising:

a thin film encapsulation layer comprising a plurality of organic films and inorganic films which are alternately stacked;

a color filter disposed on the thin film encapsulation layer and overlapping the light emitting structure, and

wherein the second light blocking pattern is disposed on the thin film encapsulation layer and configured to expose the color filter.

14. The transparent organic light emitting display apparatus of claim 1, wherein the first light blocking pattern makes contact with the base substrate.

15. A method of manufacturing a transparent organic light emitting display apparatus comprising:

forming a first light blocking pattern on a base substrate;

forming a thin film transistor on the base substrate;

forming a pixel defining layer on the base substrate on which the thin film transistor is formed;

forming a light emitting structure on the base substrate on which the pixel defining layer is formed; and

forming a second light blocking pattern overlapping the pixel defining layer, and

wherein the first light blocking pattern defines a first opening, the second light blocking pattern defines a second opening which overlaps the first opening, the pixel defining layer defines a third opening which overlaps the first and second openings, and the first to third openings are configured to pass external light therethrough, and

wherein a width of the second opening is smaller than a width of the third opening.

16. The method of claim 15, further comprising forming a third light blocking pattern on the pixel defining layer before forming the light emitting structure,

wherein the third light blocking pattern is spaced apart from the light emitting structure.

17. The method of claim 15, further comprising forming a color filter overlapping the light emitting structure before forming the second light blocking pattern.

18. The method of claim 15, further comprising forming a buffer layer on the base substrate on which the first light blocking pattern is formed before forming the thin film transistor.

19. The method of claim 15, wherein the first light blocking pattern is formed by attaching a light blocking film on the base substrate.

20. A transparent organic light emitting display apparatus comprising a transparent window configured to pass external light therethrough and a pixel configured to display an image, the transparent organic light emitting display apparatus comprising:

a first light blocking pattern defining a first opening corresponding to the transparent window;

a second light blocking pattern overlapping the first light blocking pattern; and

an opaque elements disposed between the first light blocking pattern and the second light blocking pattern, and

wherein the second light blocking pattern defines a second opening overlapping the first opening, the opaque elements define a third opening overlapping the first opening and the second opening, and

wherein the third opening is substantially larger than the first opening and the second opening.