Flexible substrate, flexible display panel and flexible display device

Patent metadata

Field	Value
Publication number	US-9685459-B2
Application number	US-201414771329-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Jun 30, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

The present invention provides a flexible substrate, a flexible display panel and a flexible display device. The flexible substrate includes an on-off element and an insulating layer, wherein a part of the insulating layer serves as a part of the on-off element, and the part of the insulating layer serving as a part of the on-off element is separated from rest part of the insulating layer. In the flexible substrate, the part of the insulating layer serving as a part of the on-off element is separated from the rest part of the insulating layer, such that cracks generated in the reset part of the insulating layer are unlikely to extend to the region where the on-off element is located, thus the poor contact or abnormal on-off phenomenon of the on-off element can be avoided.

First claim

The invention claimed is:

1. A flexible substrate, comprising an on-off element and an insulating layer, wherein a part of the insulating layer serves as a part of the on-off element, and the part of the insulating layer serving as a part of the on-off element and rest part of the insulating layer excluding the part of the insulating layer are separated from each other through spacer regions,
wherein the on-off element comprises at least one conductive via hole, the part of the insulating layer serves as a wall of each conductive via hole, and the spacer regions are provided at both sides of each conductive via hole with a distance between the spacer regions and the conductive via hole.

2. The flexible substrate of claim 1 , further comprising a drive transistor and a switch transistor, wherein the drive transistor includes a gate, a gate insulating layer, an active layer, a first source and a drain, the active layer being arranged above the gate, the gate insulating layer being arranged between the gate and the active layer, and the first source and the drain being arranged above the active layer and located at both ends of the active layer respectively; the switch transistor includes a second source arranged on the same layer as the first source; a second via hole is formed in a part of the gate insulating layer corresponding to a region overlapped with the second source and the gate; and a conductive material is filled in the second via hole to electrically connect the second source with the gate,
wherein the on-off element comprises the switch transistor, the insulating layer comprises the gate insulating layer, and the part of the gate insulating layer located between the second source and the gate serves as the part of the insulating layer.

3. The flexible substrate of claim 1 , wherein the part of the insulating layer is of a single-layer structure made from an organic insulating material or an inorganic insulating material.

4. The flexible substrate of claim 1 , wherein the part of the insulating layer is of a double-layer structure of which one layer is made from an organic insulating material and the other layer is made from an inorganic insulating material.

5. The flexible substrate of claim 1 , further comprising a flexible carrier, wherein both of the on-off element and the insulating layer are arranged on the flexible carrier.

6. A flexible display panel, comprising the flexible substrate of claim 1 .

7. A flexible display device, comprising the flexible display panel of claim 6 .

8. The flexible substrate of claim 1 , wherein the on-off element comprises a capacitor, and the part of the insulating layer serves as an insulating dielectric of the capacitor.

9. A flexible display panel, comprising the flexible substrate of claim 8 .

10. The flexible substrate of claim 1 , further comprising a drive transistor, which includes a gate, a gate insulating layer, an active layer, a first source and a drain, the active layer being arranged above the gate, the gate insulating layer being arranged between the gate and the active layer, and the first source and the drain being arranged above the active layer and located at both ends of the active layer respectively,
wherein, the on-off element comprises a capacitor, one electrode plate of the capacitor is made from the same material and is formed in the same layers as the gate, while another electrode plate of the capacitor is made from the same material and is formed in the same layer as the first source, and a part of the gate insulating layer located between the two electrode plates of the capacitor serves as the part of the insulating layer.

11. A flexible display panel, comprising the flexible substrate of claim 10 .

12. The flexible substrate of claim 1 , further comprising a drive transistor, a passivation layer and an anode sequentially arranged above the drive transistor, wherein the drive transistor includes a gate, a gate insulating layer, an active layer, a first source and a drain, the active layer being arranged above the gate, the gate insulating layer being arranged between the gate and the active layer, and the first source and the drain being arranged above the active layer and located at both ends of the active layer respectively; a first via hole is formed in a part of the passivation layer corresponding to a region overlapped with the anode and the first source; and a conductive material is filled in the first via hole to form the conductive via hole, which is used for electrically connecting the anode with the first source, and
wherein the on-off element comprises the conductive via hole, the insulating layer comprises the passivation layer, and the part of the passivation layer located between the anode and the first source serves as the part of the insulating layer.

13. A flexible display panel, comprising the flexible substrate of claim 12 .

14. The flexible substrate of claim 1 , wherein the on-off element comprises a transistor, and the part of the insulating layer serves as a switch insulating layer of the transistor.

15. The flexible substrate of claim 14 , wherein the transistor comprising a drive transistor and a switch transistor which are arranged on the same layer and have the same structure, and
wherein the insulating layer comprises a gate insulating layer, a part of the gate insulating layer located between a gate of the drive transistor and an active layer serves as the switch insulating layer of the drive transistor; and another part of the gate insulating layer located between a gate of the switch transistor and the active layer serves as the switch insulating layer of the switch transistor.

16. A flexible display panel, comprising the flexible substrate of claim 14 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Yunfei
• Shi Ling

Classifications

• H01L27/124

  Electricity · mapped topic

• G02F1/136213

  Storage capacitors associated with the pixel electrode · CPC title

• H01L27/1255

  Electricity · mapped topic

• H01L27/1218 Primary

  Electricity · mapped topic

• H01L29/423

  Electricity · mapped topic