Flexible organic light emitting diode display device

• US 9,983,714 B2
• Filed: 08/15/2017
• Issued: 05/29/2018
• Est. Priority Date: 12/22/2014
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Ahn, DongSeok
• Primary Examiner(s): Shankar, Vijay
• Application Number:
  US15/677,998
• Publication Number:
  US 20170371465A1
• Time in Patent Office: 287 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 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• 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 59/87 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 59/8793 Arrangements for polarized light emission H10K59/8791 takes precedence
• CPC Class Codes: H10K 77/111 : Flexible substrates
• CPC Class Codes: Y02E 10/549 : Organic PV cells
• CPC Class Codes: Y02P 70/50 : Manufacturing or production processes characterised by the final manufactured product

Abstract

There is provided a flexible display having a plurality of innovations configured to allow bending of a portion or portions to reduce apparent border size and/or utilize the side surface of an assembled flexible display.

Claims

1. An apparatus comprising:

a panel having a first area, a second area and a bend allowance section between the first area and the second area;

an edge structure, at the bend allowance section, that allows easier bending of the panel when compared to a panel that lacks the edge structure;

at least one driver integrated circuit (D-IC) connected to the second area of the panel, wherein the bend allowance section of the panel is bent such that the second area of the panel overlaps at least some part of the first area of the panel and the first area and the second area have less curvature than that of the bend allowance section; and

a printed circuit board coupled to the second area of the panel.

2. The apparatus of claim 1, wherein the edge structure has a rounded shape.

3. The apparatus of claim 1, wherein the edge structure at the bend allowance section is extended to the first area.

4. The apparatus of claim 1, further comprising a micro coating layer on the edge structure.

5. A display apparatus, comprising:

a base layer defined with a first area, a second area and a bend allowance section between the first area and the second area;

a plurality of display pixels on the first area of the base layer;

at least one driver integrated circuit (D-IC) connected to the second area of the base layer, wherein the bend allowance section of the base layer is bent such that the second area of the base layer overlaps at least some part of the first area of the base layer; and

the base layer includes at least one chamfered edge portion and the first area and the second area have less curvature than that of the bend allowance section.

6. The display apparatus of claim 5, wherein the chamfered edge portion in the first area of the base layer has a rounded shape.

7. The display apparatus of claim 5, wherein the chamfered edge portion in the bend allowance section of the base layer has a rounded shape.

8. The display apparatus of claim 5, wherein the bend allowance section of the base layer has a notch.

9. The display apparatus of claim 5 wherein a width of the base layer in the bend allowance section is shorter than a width of the base layer in the first area and a width of the base layer in the second area is shorter than the width of the base layer in the first area.

10. A display apparatus, comprising:

a base layer defined as a flat portion and a bend portion having a bend allowance section;

a plurality of display pixels on the flat portion of the base layer;

at least one driver integrated circuit (D-IC) connected to an area of the base layer behind of the bend allowance section of the base layer, and

wherein the area of the base layer have less curvature than that of the bend allowance section, and the base layer includes at least one chamfered edge portion in the bend portion.

11. The display apparatus of claim 10, wherein the chamfered edge portion includes at least two different angles with respect to a bend line oriented horizontally.

12. The display apparatus of claim 10, wherein the chamfered edge portion has a rounded shape.

13. The display apparatus of claim 12, wherein the rounded shape is extended to the bend allowance section in the bend portion.

14. The display apparatus of claim 10, wherein a width of the base layer at a bend line oriented horizontally is wider than a width of the base layer at a bend allowance section.

15. The display apparatus of claim 10, wherein a width of the base layer decreases from a bend line oriented horizontally to a bend allowance section.

16. The display apparatus of claim 10, wherein the chamfered edge portion is on at least one corner of the base layer and the bend portion is on at least one side portion of the base layer.

17. The display apparatus of claim 10, further comprising:

a plurality of conductive lines in the bend allowance section of the base layer, the plurality of conductive lines in the bend allowance section being routed from the D-IC to one or more conductive lines in the flat portion of the base layer; and

a micro coating layer on at least a portion of the bend portion.

18. The display apparatus of claim 10, wherein the D-IC is directly on the base layer and the base layer is a flexible layer.

19. The display apparatus of claim 10, further comprising a printed circuit board coupled to a connection interface provided in the bend portion of the base layer, wherein a touch sensor driver integrated circuit is on the printed circuit board.