Display device

Patent metadata

Field	Value
Publication number	US-10496134-B2
Application number	US-201715711207-A
Country	US
Kind code	B2
Filing date	Sep 21, 2017
Priority date	Sep 27, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A display device includes a curved plastic substrate, a display element layer over a first surface of the plastic substrate, a thin film encapsulation layer over the display element layer, a light absorption layer curved in conformity with the plastic substrate, the light absorption layer being over a second surface of the plastic substrate, the second surface being opposite to the first surface, a cushion layer over a fourth surface of the light absorption layer, a third surface of the light absorption layer facing the plastic substrate, and the fourth surface of the light absorption layer being opposite the third surface, and an electrostatic shielding layer over the cushion layer, at least one of the cushion layer and the electrostatic shielding layer has a cut pattern in a thickness direction thereof.

First claim

What is claimed is:

1. A display device, comprising:
a curved plastic substrate;
a display element layer over a first surface of the plastic substrate;
a thin film encapsulation layer over the display element layer;
a light absorption layer curved in conformity with the plastic substrate, the light absorption layer being over a second surface of the plastic substrate, the second surface being opposite to the first surface;
a cushion layer over a fourth surface of the light absorption layer, a third surface of the light absorption layer facing the plastic substrate, and the fourth surface of the light absorption layer being opposite the third surface; and
an electrostatic shielding layer over the cushion layer,
wherein at least one of the cushion layer and the electrostatic shielding layer has a cut pattern in a thickness direction thereof.

2. The display device as claimed in claim 1 , wherein the plastic substrate includes:
a display area including a plurality of pixels, the display area having a curved portion; and
a non-display area surrounding the display area.

3. The display device as claimed in claim 2 , wherein the light absorption layer entirely overlaps the display area.

4. The display device as claimed in claim 2 , wherein an end of at least one of the light absorption layer, the cushion layer, and the electrostatic shielding layer extends across the display area to be on the non-display area.

5. The display device as claimed in claim 1 , wherein an end of at least one of the light absorption layer, the cushion layer, and the electrostatic shielding layer is offset from an end of the plastic substrate.

6. The display device as claimed in claim 5 , wherein the end of the plastic substrate protrudes further than ends of the light absorption layer, the cushion layer, and the electrostatic shielding layer.

7. The display device as claimed in claim 1 , wherein the cut pattern corresponds to a curved portion of the light absorption layer.

8. The display device as claimed in claim 1 , wherein each of the cushion layer and the electrostatic shielding layer has a cut pattern, and the cut pattern of the cushion layer is connected to the cut pattern of the electrostatic shielding layer.

9. The display device as claimed in claim 1 , further comprising an adhesive layer between the second surface of the plastic substrate and the light absorption layer, the adhesive layer including debossed portions and embossed portions, the embossed portions being convex in a thickness direction of the adhesive layer toward the plastic substrate.

10. The display device as claimed in claim 9 , wherein the adhesive layer includes an acryl-based adhesive.

11. The display device as claimed in claim 9 , wherein the embossed portions are island-shaped portions spaced apart from each other, and the debossed portions are connected to each other and respectively surround the embossed portions.

12. The display device as claimed in claim 9 , wherein the debossed portions are fluidly connected to outside.

13. The display device as claimed in claim 1 , wherein the light absorption layer includes a resin material and at least one of carbon black and black ink.

14. The display device as claimed in claim 13 , wherein the light absorption layer includes:
a plastic base layer; and
a black layer over the plastic base layer, the black layer including at least one of the carbon black and the black ink.

15. The display device as claimed in claim 13 , wherein the light absorption layer includes a black resin layer in which at least one of the carbon black and the black ink is mixed.

16. The display device as claimed in claim 1 , wherein the electrostatic shielding layer includes at least one of copper and graphite.

17. The display device as claimed in claim 1 , wherein the plastic substrate includes:
a first plastic layer;
a second plastic layer over the first plastic layer; and
an inorganic layer between the first and second plastic layers.

18. The display device as claimed in claim 1 , wherein the electrostatic shielding layer, the cushion layer, the light absorption layer, the plastic substrate, the display element layer, and the thin film encapsulation layer are stacked on each other in the stated order, the cut pattern extending along a direction normal to an interface between the light absorption layer and the cushion layer.

19. The display device as claimed in claim 1 , wherein the plastic substrate includes a display area with a curved portion, the cut pattern being in a region overlapping the curved portion of the display area.

20. The display device as claimed in claim 1 , wherein a length of the cut pattern along the thickness direction is smaller than a combined thickness of the electrostatic shielding layer, the cushion layer, and the light absorption layer.

21. A flexible display device, comprising:
a plastic substrate including a first surface and a second surface opposite to the first surface;
a display element layer over the first surface of the plastic substrate;
a thin film encapsulation layer over the display element layer;
a cushion layer over the second surface of the plastic substrate; and
an electrostatic shielding layer on the cushion layer such that the cushion layer is between the plastic substrate and the electrostatic shielding layer, wherein the electrostatic shielding layer has at least two parts which are separated from each other with a gap therebetween.

22. The display device as claimed in claim 21 , wherein the plastic substrate comprises at least one selected from polyimide (PI), polyethersulphone (PES), polyacrylate (PAR), polyether imide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polycarbonate (PC), triacetylcellulose (TAC), cellulose acetate propionate (CAP), cyclic olefin polymer, and cyclic olefin copolymer.

23. The display device as claimed in claim 21 , wherein the cushion substrate comprises a resin material.

24. The display device as claimed in claim 21 , wherein the gap of the electrostatic shielding layer extends along a direction.

25. The display device as claimed in claim 24 , wherein the gap of the electrostatic shielding layer has a depth which is the same as a thickness of the electrostatic shielding layer.

26. The display device as claimed in claim 21 , wherein the electrostatic shielding layer comprises a metal material.

27. The display device as claimed in claim 21 , further comprises a light absorption layer between the plastic substrate and the cushion layer.

28. The display device as claimed in claim 21 , further comprises a touch layer on the thin film encapsulation layer, and the touch layer includes a plurality of electrodes configured to sense a touch input.

29. The display device as claimed in claim 21 , further comprises a reflection prevention layer on the thin film encapsulation layer.

30. The display device as claimed in claim 29 , wherein the reflection prevention layer includes a polarization plate, or a layer including a black matrix and a color filter.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jaechun
• KIM Woosong
• Cho Kyujin

Classifications

• H04M1/0269

  mounted in a fixed curved configuration, e.g. display curved around the edges of the telephone housing · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H04M1/0266

  for a display module assembly · CPC title

• G06F1/1643 Primary

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title