Flexible display device with side crack protection structure and manufacturing method for the same

Patent metadata

Field	Value
Publication number	US-9818764-B2
Application number	US-201615364148-A
Country	US
Kind code	B2
Filing date	Nov 29, 2016
Priority date	Aug 30, 2014
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

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.

First claim

What is claimed is:

1. A flexible display, comprising:
an active area having a plurality of pixels; and
an inactive area surrounding the active area and including a plurality of conductive lines,
wherein an insulation layer etched area is provided between a chamfered or scribed edge of the inactive area and at least one of the plurality of conductive lines in the inactive area,
wherein the insulation layer etched area between the chamfered or scribed edge of the inactive area and the at least one of the conductive lines in the inactive area is provided with a stripe of insulation layer spaced apart from the at least one conductive lines, wherein the strip of the insulation layer is not disposed on (or covering) the top of the at least one conductive lines.

2. The flexible display of claim 1 , wherein the insulation layer etched area is along at least a part of the chamfered or scribed edge of the inactive area.

3. The flexible display of claim 1 , wherein the stripe of insulation layer comprises a stack of multiple inorganic insulation layers.

4. The flexible display of claim 3 , wherein the multiple inorganic insulation layers comprise one or more silicon nitride (SiN x ) layers and one or more silicon oxide (SiO 2 ) layers.

5. The flexible display of claim 3 , wherein the stripe of insulation layer includes more insulation layers than a portion close to the stripe of insulation layer among the insulation layer etched area.

6. The flexible display of claim 5 , wherein the stripe of insulation layer is thicker than the portion close to the stripe of insulation layer.

7. The flexible display of claim 1 , wherein the stripe of insulation layer is configured to act as a dam for inhibiting moisture or foreign materials from reaching the conductive line.

8. The flexible display of claim 1 , wherein crack propagation from the chamfered or scribed edge towards the conductive line is suppressed due to the insulation layer etched area.

9. The flexible display of claim 1 , further comprising:
a bend allowance section including at least some portion of the active area and at least some portion of the inactive area, the bend allowance section being configured to be bent with a certain radius of curvature.

10. A display, comprising:
a flexible base layer having a display area and a non-display area provided on one or more sides of the display area;
a GIP (gate-in-panel) circuitry in the non-display area; and
a crack stopper structure between the GIP circuitry and an outer edge of the non-display area;
wherein the crack stopper structure comprises at least one of a recessed channel and a floating metal trace with a strain reducing pattern.

11. The flexible display of claim 10 , wherein the crack stopper structure is configured to block propagation of cracks initiated at the outer edge of the non-display area.

12. The flexible display of claim 11 , the cracks occur during scribing and/or chamfering some part of the flexible display.

13. The flexible display of claim 10 , wherein the recessed channel results from at least one or more insulation layers being etched.

Assignees

• Lg Display Co Ltd

Inventors

• Kwon Seyeoul
• Yang Heeseok
• Youn Sangcheon

Classifications

• G02F2201/50

  Protective arrangements · CPC title

• G09F9/301

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• H05K1/189

  characterised by the use of flexible or folded printed circuits · CPC title

• G02F1/13452

  Conductors connecting driver circuitry and terminals of panels · CPC title

• G02F1/1345

  Conductors connecting electrodes to cell terminals · CPC title