DISPLAY DEVICE

• US 20150009632A1
• Filed: 12/28/2013
• Published: 01/08/2015
• Est. Priority Date: 07/03/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: MIN, Gui-Nam
• Granted Patent: US 9,681,567 B2
• Time in Patent Office: Days
• US Class Current: 361/728
• CPC Class Codes: C09J 7/22 Plastics; Metallised plastics
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133331 Cover glasses
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• CPC Class Codes: H05K 7/02 Arrangements of circuit components or wiring on supporting structure

Abstract

A display device includes: a display module; a window disposed on the display module; and an adhesive layer disposed between the display module and the window, where the adhesive layer includes a pressure sensitive adhesive including an impregnation region impregnated with a fiber, and a density of the fiber in the adhesive layer is predetermined based on a position thereof in the impregnation region or a part of the display device corresponding thereto.

Claims

1. A display device, comprising

a display module;

a window disposed on the display module; and

an adhesive layer disposed between the display module and the window,

wherein

the adhesive layer comprises a pressure sensitive adhesive comprising an impregnation region impregnated with a fiber, and

a density of the fiber in the adhesive layer is predetermined based on a position thereof in the impregnation region or a part of the display device corresponding thereto.

2. The display device of claim 1, wherein the adhesive layer has a single layer structure.

3. The display device of claim 1, wherein the fiber comprises a glass fiber, a carbon fiber, an aramid-based fiber, a polyester fiber, asbestos, a cellulose-based fiber, or a combination thereof, and wherein the fiber has a fabric type of plain fabrics, twilled fabrics, satin weave fabrics, unidirectional fabrics, or a combination thereof.

4. The display device of claim 1, wherein an amount of the fiber in the pressure sensitive adhesive is in a range of about 10 wt % to about 90 wt % based on a total amount of the pressure sensitive adhesive.

5. The display device of claim 1, wherein

the impregnation region comprises a first impregnation portion and a second impregnation portion, and

a density of the fiber in the first impregnation portion is lower than a density of the fiber in the second impregnation portion.

6. The display device of claim 5, wherein

the density of the fiber in the first impregnation portion is about 0.1 to about 0.9 times the density of the fiber in the second impregnation portion.

7. The display device of claim 5, wherein

the first impregnation portion has a modulus in a range of about 0.001 megapascal to about 500 megapascals, and

the second impregnation portion has a modulus in a range about 900 megapascals to about 20,000 megapascals.

8. The display device of claim 5, further comprising:

a folding part which is foldable; and

a flat part,

wherein the first impregnation portion corresponds to the folding part, and the second impregnation portion corresponds to the flat part.

9. The display device of claim 1, wherein

the pressure sensitive adhesive further comprises a non-impregnation region, which is not impregnated with the fiber.

10. The display device of claim 9, wherein

the impregnation region has a modulus in a range of about 900 megapascals to about 20,000 megapascals, and

the non-impregnation region has a modulus in a range of about 0.001 megapascal to about 500 megapascals.

12. The display device of claim 1, wherein the impregnation region comprises a plurality of layers.

13. The display device of claim 12, wherein a portion of the impregnation region comprises:

a first layer facing the window; and

a second layer facing the display module,

wherein each of the first layer and a second layer has a single layer structure, or a multi-layer structure, and

a density of the fiber in the first layer is higher than a density of the fiber in the second layer.

14. The display device of claim 13, wherein

the density of the fiber in the first layer is about 2 to about 10 times the density of the fiber in the second layer.

15. The display device of claim 13, wherein

the first layer has a modulus in a range of about 900 megapascals to about 20,000 megapascals, and

the second layer has a modulus in a range of about 0.001 megapascal to about 500 megapascals.

16. The display device of claim 13, further comprising:

a folding part which is foldable; and

a flat part,

wherein the portion of the impregnation region comprising the first layer and the second layer corresponds to at least one of the folding part and the flat part.

17. The display device of claim 12, wherein a portion of the impregnation region comprises:

a first layer facing the window;

a third layer facing the display module; and

a second layer disposed between the first and third layers,

wherein

each of the first, second and third layers has a single layer structure or a multi-layer structure, and

a density of the fiber in each of the first layer and third layers is lower than a density of the fiber in the second layer.

18. The display device of claim 17, wherein

the density of the fiber in each of the first layer and the third layer is about 0.1 to about 0.9 times the density of the fiber in the second layer.

19. The display device of claim 17, wherein

each of the first layer and the third layer has a modulus in a range of about 0.001 megapascal to about 500 megapascals, and

the second layer has a modulus in a range of about 900 megapascals to about 20,000 megapascals.

20. The display device of claim 17, further comprising:

a rolling part which is rollable,

wherein the portion of the impregnation region comprising the first layer to the third layer corresponds to the rolling part.

11. The display device of claim 11, further comprising:

a folding part which is foldable; and

a flat part,

wherein the non-impregnation region corresponds to the folding part, and the impregnation region corresponds to the flat part.