Display panel and method for manufacturing the same

• US 9,372,364 B2
• Filed: 04/02/2014
• Issued: 06/21/2016
• Est. Priority Date: 09/03/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Jang-Hyun, Lee, Jin-Hyeong, Oh, Keun-Chan, Yoon, Won-Gap, Lee, Chang-Hun, Jang, Ji-Eun
• Primary Examiner(s): Chien, Lucy
• Application Number:
  US14/242,933
• Publication Number:
  US 20150062524A1
• Time in Patent Office: 811 Days
• Field of Search: 349/153
• US Class Current: 1/1
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

A display panel is provided. A first substrate includes a display area and a peripheral area. The peripheral area surrounds the display area. A second substrate is disposed on the first substrate. The second substrate faces the first substrate along a first direction. A liquid crystal layer is interposed between the first substrate and the second substrate. A multi-layered sealant is disposed on the peripheral area of the first substrate. The multi-layered sealant surrounds the liquid crystal layer. The multi-layered sealant includes a first sealant layer including an acrylate resin having a functional group having at least 3 carbon atoms, and a second sealant layer including an epoxy resin having a (meth)arcylate group.

Claims

1. A display panel, comprising:

a first substrate including a display area and a peripheral area, the peripheral area surrounding the display area;

a second substrate disposed on the first substrate, facing the first substrate along a first direction;

a liquid crystal layer interposed between the first substrate and the second substrate; and

a multi-layered sealant disposed on the peripheral area of the first substrate and surrounding the liquid crystal layer,

wherein the multi-layered sealant includes;

a first sealant layer including an acrylate resin, and

a second sealant layer including an epoxy resin having a (meth)arcylate group, and

wherein each of the first sealant layer and the second sealant layer includes a plurality of particles formed of a silica,

wherein the particles of the first sealant layer are formed of a first particle having a first diameter and a second particle having a second diameter which is greater that the first diameter.

2. The display panel of claim 1,

wherein the multi-layered sealant is about 0.1 mm to about 1.0 mm in width measured in a second direction crossing the first direction, and the multi-layered sealant is about 2 μ

m to about 5 μ

m in height measured in the first direction.

3. The display panel of claim 1,

wherein the multi-layered sealant further includes a third sealant layer, wherein the first sealant layer, the second sealant layer, and the third sealant layer are vertically stacked on each other along the first direction.

4. The display panel of claim 3, further comprising:

a first dam partly covering a first side surface of the multi-layered sealant; and

a second dam partly covering a second side surface of the multi-layered sealant, wherein the second dam is in contact with the liquid crystal layer.

5. The display panel of claim 4,

wherein the first dam and the second dam are about 0.02 mm to about 0.05 mm in width measured in a second direction crossing the first direction.

6. The display panel of claim 1,

wherein the first sealant layer and the second sealant layer are stacked side by side along a second direction crossing the first direction, and

wherein the second sealant layer is interposed between the first sealant layer and the liquid crystal layer.

7. The display panel of claim 6, further comprising:

a first dam interposed between the first sealant layer and the second sealant layer; and

a second dam interposed between the second sealant layer and the liquid crystal layer.

8. The display panel of claim 6, further comprising:

an air layer interposed between the first sealant layer and the second sealant layer.

9. The display panel of claim 8,

wherein the air layer is about 0.02 mm to about 0.05 mm in width measured along a second direction crossing the first direction.

10. The display panel of claim 6,

wherein the first sealant layer is disposed between the second sealant layer and the liquid crystal layer.

11. The display panel of claim 10, further comprising:

a first dam interposed between the first sealant layer and the second sealant layer; and

a second dam interposed between the first sealant layer and the liquid crystal layer.

12. The display panel of claim 11, further comprising:

an air layer disposed between the first sealant layer and the second sealant layer.

13. The display panel of claim 12,

wherein a width of the air layer is about 0.02 mm to about 0.05 mm in width.

20. The display panel of claim 1, further comprising:

a dam disposed on the peripheral area of the first substrate,

wherein the multi-layered sealant has a first height, and wherein the dam has a second height less than the first height.

14. A method for manufacturing a display panel, comprising:

providing a sealing composition to a peripheral area of a first substrate, the sealing composition including a first sealing composition including acrylate resin, and a second sealing composition including modified epoxy resin having a (meth)arcylate group;

forming a dam on the peripheral area of the first substrate to prevent a flow of the sealing composition;

stacking a second substrate on the sealing composition to face the first substrate;

providing light to the sealing composition to harden the sealing composition; and

providing heat to the sealing composition to further harden the sealing composition,

wherein the sealing composition is formed in a first height and the dam is formed in a second height less than the first height,

wherein the first sealing composition includes a plurality of particles formed of a silica, and

wherein the particles of the first sealing composition are formed of a first particle having a first diameter and a second particle having a second diameter which is greater that the first diameter.

15. The method of claim 14,

wherein the first sealing composition comprises:

about 10% by weight to about 40% by weight of a modified epoxy resin including an acrylate group;

about 2% by weight to about 10% by weight of an acrylate resin including a functional group having at least 3 carbon atoms;

about 10% by weight to about 40% by weight of an acrylate monomer;

about 1% by weight to about 30% by weight of a heat-curing agent;

about 1% by weight to about 30% by weight of a photo-polymerization initiator;

about 10% by weight to about 50% by weight of a filler; and

about 10% by weight to about 30% by weight of a solvent.

16. The method of claim 14,

wherein the second sealing composition comprises:

about 10% by weight to about 40% by weight of a modified epoxy resin including a (meth)acrylate group;

about 2% by weight to about 10% by weight of an acrylate resin including at least 3 functional groups having at least 5 carbon atoms;

about 30% by weight to about 40% by weight of an acrylate monomer;

about 3% by weight to about 10% by weight of a heat-curing agent;

about 1% by weight to about 10% by weight of a photo-polymerization initiator;

about 10% by weight to about 50% by weight of a filler; and

about 10% by weight to about 30% by weight of a solvent.

17. The method of claim 14,

wherein the sealing composition further comprises:

a third sealing composition including;

about 30% by weight to about 40% by weight of a modified epoxy resin including an acrylate group;

about 2% by weight to about 10% by weight of an acrylate resin including a functional group having at least 3 carbon atoms;

about 10% by weight to about 40% by weight of an acrylate monomer;

about 1% by weight to about 10% by weight of a heat-curing agent;

about 1% by weight to about 10% by weight of a photo-polymerization initiator;

about 10% by weight to about 50% by weight of a filler; and

about 10% by weight to about 30% by weight of a solvent.

18. The method of claim 17,

wherein the providing a sealing composition comprises:

providing the first sealing composition;

providing the second sealing composition on the first sealing composition; and

providing the third sealing composition on the second sealing composition.

19. The method of claim 14,

wherein the first sealing composition and the second sealing composition are provided to the first substrate at the same time.