Transparent display device effectively suppressing misalignment in bonding substrates

Patent metadata

Field	Value
Publication number	US-11575106-B2
Application number	US-202017010209-A
Country	US
Kind code	B2
Filing date	Sep 2, 2020
Priority date	Sep 23, 2019
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A transparent display device includes a display panel including first areas which are emission areas and second areas which are transmission areas, the display panel includes a first substrate and a second substrate facing each other, the first substrate includes an insulating layer having an open hole that is prepared by removing the insulating layer by at least a partial thickness in the second area, and the second substrate includes a transparent spacer located in the second area and pulled into the open hole.

First claim

What is claimed is:

1. A transparent display device, comprising:
a display panel including first areas which are emission areas and second areas which are transmission areas, which transmit external light so that a user recognizes objects located on the rear surface of the transparent display device,
wherein the display panel includes first and second substrates facing each other, and
the first substrate includes an insulating layer having an open hole that is formed by removing the insulating layer by at least a partial thickness in the second area,
the second substrate includes a transparent spacer located in the second area only and pulled into the open hole, and
the first area includes an organic emission layer extended along both lateral sides of the transparent spacer.

2. The transparent display device according to claim 1 , wherein the transparent spacer has a cross-section that includes:
a first top side in contact with the second substrate;
a first bottom side facing the first top side;
a first right side connecting one side of the first top side and one side of the first bottom side; and
a first left side connecting the other side of the first top side and the other side of the first bottom side, and
wherein the open hole has a cross-section that includes:
a second bottom side facing the first bottom side;
a second right side extended from one end of the second bottom side and facing the first right side; and
a second left side extended from the other end of the second bottom side and facing the first left side.

3. The transparent display device according to claim 2 , wherein the first bottom side and the first right side form an internal angle to be a right angle or an obtuse angle, and
wherein the second bottom side and the second right side form an internal angle corresponding to an internal angle formed by the first bottom side and the first right side.

4. The transparent display device according to claim 2 , wherein the first bottom side and the first left side form an internal angle to be a right angle or an obtuse angle, and
wherein the second bottom side and the second left side form an internal angle corresponding to an internal angle formed by the first bottom side and the first left side.

5. The transparent display device according to claim 1 , wherein the first areas include a first sub-area and a second sub-area located adjacent to each other with the second area interposed therebetween, and the first substrate includes:
a first sub-electrode disposed only in the first sub-area;
a second sub-electrode disposed only in the second sub-area;
an organic emission layer covering the first sub-electrode and the second sub-electrode and disposed and extended on the first sub-area, the second areas and the second sub-area; and
a second electrode covering the organic emission layer and disposed and extended on the second sub-area, the first areas and the second sub-area.

6. The transparent display device according to claim 5 , wherein a part of the organic emission layer and a part of the second electrode are disposed inside the open hole.

7. The transparent display device according to claim 5 , wherein the open hole penetrates the insulating layer, and a part of the organic emission layer and a part of the second electrode are disposed inside the open hole.

8. The transparent display device according to claim 1 , wherein, the first areas include a first sub-area and a second sub-area located adjacent to each other with the second area interposed therebetween, and the first substrate includes:
a first sub-electrode disposed only in the first sub-area;
a second sub-electrode disposed only in the second sub-area;
a second electrode covering the organic emission layer and disposed and disposed on the first sub-area and the second sub-area,
wherein the open hole penetrates the insulating layer and the organic emission layer and the second electrode are removed from the inside of the open hole to expose the first substrate, and
wherein the organic emission layer covers the first sub-electrode and the second sub-electrode and disposed on the first sub-area and the second sub-area.

9. The transparent display device according to claim 8 , wherein the transparent spacer is in direct contact with the first substrate inside the open hole.

10. The transparent display device according to claim 1 , wherein the display panel includes pixels disposed in the first areas, and the transparent spacer is located between each pair of the pixels adjacent to each other.

11. The transparent display device according to claim 1 , wherein the display panel includes pixels disposed in the first areas, and the transparent spacer is selectively located between the pixels adjacent to each other in a predetermined area only.

12. The transparent display device according to claim 1 , wherein the display panel includes pixels disposed in the first areas, and the transparent spacer is located and extended as one body between a plurality of pairs of the pixels adjacent to each other.

13. The transparent display device according to claim 1 , wherein the transparent spacer contains frit powder.

14. The transparent display device according to claim 1 , further comprising a dam located on edges of the first substrate and the second substrate,
wherein the dam contains frit powder.

15. The transparent display device according to claim 14 , wherein the dam further contains a binder for fixing the frit powder to the first substrate and the second substrate.

16. A transparent display device, comprising:
a display panel including emission areas and transmission areas which transmit external light so that a user recognizes objects located on the rear surface of the transparent display device,
wherein the display panel includes a transistor array substrate and a color filter substrate facing each other,
wherein the transistor array substrate includes an insulating layer having an open hole that is formed by removing at least a part of the insulating layer in the transmission areas,
wherein the color filter substrate includes a transparent spacer located in the transmission areas only and accommodated in the open hole,
wherein the shape of the transparent spacer corresponds to the shape of the open hole, and
wherein the first area includes an organic emission layer extended along both lateral sides of the transparent spacer.

17. The transparent display device according to claim 16 , wherein the transparent spacer have a shape protruding toward the transistor array substrate and at least a part of the transparent spacer is inserted into an inner space inside the open hole.

18. The transparent display device according to claim 16 , wherein the transparent spacer is contact with the transistor array substrate inside the open hole.

19. The transparent display device according to claim 16 , wherein the transparent spacer has a cross section that includes:
a first top side in contact with the color filter substrate;
a first bottom side facing the first top side;
a first right side connecting one side of the first top side and one side of the first bottom side; and
a first left side connecting the other side of the first top side and the other side of the first bottom side, and
wherein the open hole has a cross-section that includes:
a second bottom side facing the first bottom side;
a second right side extended from one end of the second bottom side and facing the first right side; and
a second left side extended from the ot

Assignees

• Lg Display Co Ltd

Inventors

• Park Sunghee
• Han Joonsoo
• Park Sunyoung

Classifications

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/805

  Electrodes · CPC title

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/8723 Primary

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title