FLEXIBLE DISPLAY APPARATUS

• US 20200136066A1
• Filed: 08/28/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Jin, JaeHyun
• Granted Patent: US 10,873,043 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 2203/04102 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 Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A flexible display apparatus can have a flexible substrate including: an active area including a plurality of driving TFTs and a plurality of organic emission elements, and an inactive area including a first inactive area adjacent to the active area, a second inactive area for a circuit board, and a bending area between the first inactive area and the second inactive area; a component disposed on at least a part of the first inactive area; a plurality of wiring lines extending from the plurality of driving TFTs to the first inactive area, the bending area and the second inactive area; and a support layer disposed across the active area, the first inactive area, the bending area, and the second inactive area, in which a portion the support layer includes at least one cut portion overlapping with the bending area of the flexible substrate.

Claims

1. A flexible display apparatus, comprising:

a flexible substrate including;

an active area including a plurality of driving thin film transistors (TFTs) and a plurality of organic emission elements, and

an inactive area including a first inactive area adjacent to the active area, a second inactive area for a circuit board, and a bending area between the first inactive area and the second inactive area;

a component disposed on at least a part of the first inactive area;

a plurality of wiring lines extending from the plurality of driving TFTs to the first inactive area, the bending area and the second inactive area; and

a support layer disposed across the active area, the first inactive area, the bending area, and the second inactive area,

wherein a portion the support layer includes at least one cut portion overlapping with the bending area of the flexible substrate.

2. The flexible display apparatus according to claim 1, further comprising:

a polarizing layer and a cover window disposed on the flexible substrate.

3. The flexible display apparatus according to claim 2, further comprising:

a touch sensing layer disposed on at least one of a top surface of the flexible substrate or a bottom surface of the flexible substrate.

4. The flexible display apparatus according to claim 1, wherein the at least one cut portion of the support layer has a tapered shape relative to the flexible substrate.

5. The flexible display apparatus according to claim 4, wherein the at least one cut portion of the support layer having the tapered shape includes trimming lines facing each other in an area of the support layer overlapping with the bending area of the flexible substrate.

6. The flexible display apparatus according to claim 1, wherein the component includes a crack stopper structure, a gate-in-panel circuit (GIP), and an electrostatic discharge (ESD) circuit.

7. The flexible display apparatus according to claim 1, further comprising:

a notch in the flexible substrate, the notch extending from the first inactive area to the second inactive area via the bending area; and

an organic coating layer disposed along an edge of the notch from the first inactive area to the second inactive area.

8. The flexible display apparatus according to claim 1, wherein the at least one cut portion of the support layer includes three cut portions overlapping with the bending area of the flexible substrate.

9. The flexible display apparatus according to claim 1, wherein the support layer includes at least two segmented portions overlapping with the bending area of the flexible substrate.

10. The flexible display apparatus according to claim 9, wherein an angle between top surfaces of the support layer including the at least two segmented portions is greater than 100°

and less than 140°

.

11. A flexible display apparatus, comprising:

a substrate including an active area and an inactive area;

a light emitting display element disposed in the active area; and

an encapsulation layer disposed on at least a part of the inactive area and covering the light emitting display element in the active area;

a polarizing layer disposed on the encapsulation layer;

a cover window disposed on the polarizing layer;

a first component forming part formed along a part of the inactive area, a notch line and a bending part;

a second component forming part formed along an outermost periphery of the inactive area and including a bottom surface facing a bottom surface of the active area; and

a support layer extending along the bottom surface of the active area and the bottom surface of the second component forming part,

wherein a part of the support layer overlapping with the bending part has removed portions.

12. The flexible display apparatus according to claim 11, wherein a bottom surface of the bending part includes at least two areas from which the support layer is removed.

13. The flexible display apparatus according to claim 11, wherein the notch line is defined by cutting at least two corners of the inactive area.

14. The flexible display apparatus according to claim 12, wherein in the bottom surface of the bending part, one or more cylindrical holes are located in the at least two areas from which the support layer is removed.

15. The flexible display apparatus according to claim 12, wherein in the bottom surface of the bending part, one or more pyramid shaped holes are located in the at least two areas from which the support layer is removed.

16. The flexible display apparatus according to claim 12, wherein in the bottom surface of the bending part, at least one rectangular trench is located in the at least two areas from which the support layer is removed.

17. The flexible display apparatus according to claim 11, wherein a cross-section of the part with the removed portions has a forward tapered shape.

18. The flexible display apparatus according to claim 17, wherein the cross-section of the part with the removed portions has a taper angle of about 60°

to about 70°

.

19. The flexible display apparatus according to claim 11, wherein the first component forming part includes a crack stopper structure and a gate-in-panel circuit (GIP).

20. The flexible display apparatus according to claim 11, further comprising:

a touch sensing layer disposed under the support layer.