Display device, pressure detecting method and pressure detecting device

• US 10,007,387 B2
• Filed: 01/25/2016
• Issued: 06/26/2018
• Est. Priority Date: 09/18/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Zou, Xiangxiang, Zhou, Jiayang, Wang, Xuefei
• Primary Examiner(s): Elahi, Towfiq
• Application Number:
  US15/324,452
• Publication Number:
  US 20170212616A1
• Time in Patent Office: 883 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 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

Disclosed is a display device, a pressure detecting method and a pressure detecting device. Since a FPC electrode disposed on a side of a FPC board facing a display panel, an upper electrode for grounding disposed on a side of the display panel facing the flexible printed board and an elastically deformable dielectric material disposed between the FPC electrode and the upper electrode and contacting therewith respectively are additionally disposed between the FPC board and the upper electrode, or a FPC electrode disposed on a side of a FPC board facing a support frame and an elastically deformable dielectric material disposed between the FPC electrode and the support frame and contacting therewith respectively are additionally disposed between the FPC board and the support frame, it is possible to detect a magnitude of a pressure exerted on the display panel, thereby overcoming the defect that the existing display device can not realize pressure detection, thus improving user experience.

Claims

1. A display device comprising:

a display panel provided for displaying an image;

a support frame for grounding; and

a flexible printed circuit (FPC) board comprising;

a bending portion electrically connected with the display panel; and

a plane portion disposed between the display panel and the support frame, the bending portion and the plane portion being formed as a unitary structure,

wherein the display device further comprises;

a FPC electrode disposed on a side of the plane portion of the FPC board facing the display panel;

an upper electrode configured for grounding and disposed on a side of the display panel facing the plane portion of the FPC board; and

an elastically deformable dielectric material disposed between the FPC electrode and the upper electrode and contacting therewith respectively,

wherein the FPC electrode and the upper electrode constitute a capacitor, and

wherein the display panel, the upper electrode, the dielectric material, the FPC electrode, the plane portion of the FPC board, and the supporting frame are sequentially overlapped in a thickness direction of the display device.

2. The display panel according to claim 1, wherein

the elastically deformable dielectric material is selected from one of foam, resin and rubber.

3. The display device according to claim 1, wherein

the FPC electrode is a plate electrode;

or

the FPC electrode is a matrix-type electrode including a plurality of sub-electrodes arranged in a matrix form.

4. The display device according to claim 1, wherein

the upper electrode is a plate electrode;

or

the upper electrode is a matrix-type electrode including a plurality of sub-electrodes arranged in a matrix form.

5. The display device according to claim 1, wherein

each of the FPC electrode and the upper electrode is a matrix-type electrode including a plurality of sub-electrodes arranged in a matrix form;

and

the plurality of sub-electrodes of the upper electrode correspond to the plurality of sub-electrodes of the FPC electrode one by one.

6. The display device according to claim 1, wherein the upper electrode and the support frame are connected with each other by a conductive adhesive.

7. The display device according to claim 1, wherein the FPC electrode is connected to a wiring layer of the FPC board through a metal wiring so as to be connected with the FPC board.

8. A pressure detecting method for use with the display device according to claim 1, comprising steps of:

detecting a change value of capacitance between the upper electrode and the FPC electrode when an external force is exerted on the display panel; and

determining a magnitude of a pressure exerted on the display panel based on the detected change value of capacitance.

9. A display device comprising:

a display panel provided for displaying an image;

a support frame for grounding; and

a flexible printed circuit (FPC) board comprising;

a bending portion electrically connected with the display panel; and

a plane portion disposed between the display panel and the support frame, the bending portion and the plane portion being formed as a unitary structure,

wherein the display device further comprises;

a FPC electrode disposed on a side of the plane portion of the FPC board facing the support frame; and

an elastically deformable dielectric material disposed between the FPC electrode and the support frame and contacting therewith respectively,

wherein the FPC electrode and the support frame constitute a capacitor, and

wherein the display panel, the plane portion of the FPC board, the FPC electrode, the dielectric material, and the supporting frame are sequentially overlapped in a thickness direction of the display device.

10. The display device according to claim 9, wherein

the elastically deformable dielectric material is foam.

11. The display device according to claim 9, wherein

the FPC electrode is a plate electrode;

or

the FPC electrode is a matrix-type electrode including a plurality of sub-electrodes arranged in a matrix form.

12. The display device according to claim 9, wherein the FPC electrode is connected to a wiring layer of the FPC board through a metal wiring so as to be connected with the FPC board.

13. A pressure detecting method for use with the display device according to claim 9, comprising steps of:

detecting a change value of capacitance between the FPC electrode and the support frame when an external force is exerted on the display panel; and

determining a magnitude of a pressure exerted on the display panel based on the detected change value of capacitance.