Flexible body and method for controlling flexible body to deform

Patent metadata

Field	Value
Publication number	US-11706992-B2
Application number	US-201916646133-A
Country	US
Kind code	B2
Filing date	Sep 27, 2019
Priority date	Jan 2, 2019
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

Provided are a flexible body and a method for controlling the flexible body to deform. The flexible body comprises one or more flexible units, wherein each of the flexible units comprises: a first electrode, a second electrode, an electroactive polymer layer, and a thin film transistor, wherein a source electrode or a drain electrode of the thin film transistor is electrically connected to the second electrode. The first electrode and the second electrode are configured to provide an electric field acting on the electroactive polymer layer, and the electroactive polymer layer is configured to deform in response to the electric field provided by the first electrode and the second electrode.

First claim

What is claimed is:

1. A flexible body comprising one or more flexible units, wherein each of the flexible units comprises: a first electrode, a second electrode, an electroactive polymer layer, and a thin film transistor, wherein a source electrode or a drain electrode of the thin film transistor is electrically connected to the second electrode;
wherein the first electrode and the second electrode are configured to provide an electric field acting on the electroactive polymer layer, and the electroactive polymer layer is configured to deform in response to the electric field provided by the first electrode and the second electrode; and
wherein the electroactive polymer layer comprises an ion-type electroactive polymer, and the flexible unit further comprises an electrolyte solution layer in contact with the electroactive polymer layer,
wherein the electroactive polymer layer comprises N electroactive polymer sub-layers, the electrolyte solution layer comprises N−1 electrolyte solution sub-layers, and each of the electrolyte solution sub-layers is arranged between two adjacent electroactive polymer sub-layers, wherein N is an integer greater than 1.

2. The flexible body according to claim 1 , wherein the first electrode and the second electrode are respectively arranged on opposite sides of the electroactive polymer layer, or the first electrode and the second electrode are arranged on the same side of the electroactive polymer layer.

3. The flexible body according to claim 1 , wherein the electroactive polymer layer is doped with a movable anion.

4. The flexible body according to claim 1 , wherein the flexible unit further comprises a first insulating layer overlaying the thin film transistor, wherein the second electrode is formed on a side of the first insulating layer away from the thin film transistor, the first insulating layer is provided with a via hole, and the source electrode or drain electrode of the thin film transistor is electrically connected to the second electrode through the via hole.

5. The flexible body according to claim 1 , wherein the flexible unit comprises a thin film transistor array composed of a plurality of thin film transistors, a second electrode array composed of a plurality of second electrodes, and one or more first electrodes, wherein a source electrode or a drain electrode of each thin film transistor in the thin film transistor array is electrically connected to one respective second electrode in the second electrode array, and the plurality of second electrodes in the second electrode array are arranged separately and respectively corresponding to different positions of the electroactive polymer layer.

6. The flexible body according to claim 5 , wherein one first electrode together with at least two second electrodes provides an electric field acting on the electroactive polymer layer.

7. The flexible body according to claim 6 , wherein the flexible unit further comprises a data voltage generator configured to be electrically connected to the source electrodes or drain electrodes of the plurality of thin film transistors in the thin film transistor array to provide different first voltages to the second electrodes.

8. The flexible body according to claim 1 , wherein the flexible body comprises a plurality of flexible units arranged along an extending direction of the electroactive polymer layer.

9. The flexible body according to claim 8 , wherein the first electrode is a common electrode.

10. The flexible body according to claim 9 , wherein the flexible unit further comprises a common electrode wire on the same side as the thin film transistor, and the common electrode wire is connected to the common electrode through a conductive adhesive.

11. The flexible body according to claim 1 , wherein the flexible body comprises a plurality of flexible units arranged in lamination in a direction perpendicular to an extending direction of the electroactive polymer layer.

12. The flexible body according to claim 1 configured for use in an artificial muscle, an artificial limb, a massage chair, or a transmitter.

13. A method for controlling the flexible body according to claim 1 to deform, comprising:
applying a first voltage to the source electrode or drain electrode of the thin film transistor;
applying a second voltage to the first electrode; and
changing the first voltage to modulate the electric field acting on the electroactive polymer layer, thereby controlling the flexible body to deform accordingly.

14. The method according to claim 13 , wherein the flexible unit comprises a thin film transistor array composed of a plurality of thin film transistors, a second electrode array composed of a plurality of second electrodes, one or more first electrodes, and a data voltage generator electrically connected to the source electrodes or drain electrodes of the plurality of thin film transistors in the thin film transistor array, and the method comprises:
providing first voltages to the plurality of thin film transistors in one-to-one correspondence by the data voltage generator, wherein the first voltages have different voltage values from each other;
applying the second voltage to the one or more first electrodes; and
changing the first voltage provided by the data voltage generator to modulate the electric field acting on the electroactive polymer layer, thereby controlling the flexible body to deform accordingly.

15. The flexible body according to claim 13 , wherein the flexible body comprises a plurality of flexible units, and the method comprises:
providing first voltages to the thin film transistors in one respective flexible unit in one-to-one correspondence by a plurality of data voltage generators, wherein the first voltages have different voltage values from each other;
applying the second voltage to the first electrode; and
changing the first voltages provided by the plurality of data voltage generators to modulate the electric field acting on the electroactive polymer layer, thereby controlling the flexible body to deform accordingly.

16. The method according to claim 13 , wherein the deformation of the flexible body comprises expansion and shrinkage.

17. A flexible body comprising one or more flexible units, wherein each of the flexible units comprises: a first electrode, a second electrode, an electroactive polymer layer, and a thin film transistor, wherein a source electrode or a drain electrode of the thin film transistor is electrically connected to the second electrode;
wherein the first electrode and the second electrode are configured to provide an electric field acting on the electroactive polymer layer, and the electroactive polymer layer is configured to deform in response to the electric field provided by the first electrode and the second electrode; and
wherein the electroactive polymer layer comprises an ion-type electroactive polymer, and the flexible unit further comprises an electrolyte solution layer in contact with the electroactive polymer layer,
wherein the electroactive polymer layer comprises M electroactive polymer sub-layers, the electrolyte solution layer comprises M or M+1 electrolyte solution sub-layers, and the electrolyte solution sub-layers and the electroactive polymer sub-layers are alternately arranged, wherein M is a positive integer.

18. A method for controlling the flexible body according to claim 17 to deform, comprising:
applying a first voltage to the source electrode or drain electrode of the thin film transistor;
applying a second voltage to the first electrode;

Assignees

• Fuzhou Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Sun Xiaowu
• Lu Junxiang
• Huang Jie
• Wang Jianshu
• Zhu Peitao
• Zhang Yajiao
• Chen Ting
• Hu Song

Classifications

• H10N39/00 Primary

  Integrated devices, or assemblies of multiple devices, comprising at least one piezoelectric, electrostrictive or magnetostrictive element covered by groups H10N30/00 – H10N35/00 · CPC title

• H02N2/0075

  Electrical details, e.g. drive or control circuits or methods · CPC title

• H10N30/20

  with electrical input and mechanical output, e.g. functioning as actuators or vibrators · CPC title

• H10N30/802

  Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits · CPC title

• H10N30/857

  Macromolecular compositions · CPC title