DISPLAY DEVICE AND ELECTRONIC DEVICE WITH PRESSURE SENSING

• US 20170083147A1
• Filed: 09/20/2016
• Published: 03/23/2017
• Est. Priority Date: 09/22/2015
• Status: Abandoned Application

• Current Assignee: HannStar Display Corporation
• Original Assignee: HannStar Display Corporation
• Inventors: Su, Chen-Hao, Chen, Yu-Ting
• Application Number:
  US15/270,006
• Publication Number:
  US 20170083147A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04142 the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• 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

The display device includes a display panel, a back light module, a first sensing electrode and a second sensing electrode. The back light module has a first side and a second side which are opposite to each other. The display panel is disposed at the first side of the back fight module. The first sensing electrode is disposed at the first side of the back light module, and at least part of the second sensing electrode is disposed at the second side of the back light module, and the second sensing electrode is separated from the first sensing electrode by a predetermined distance. Accordingly the display device has functions of pressure sensing.

Claims

1. A display device with pressure sensing, comprising:

a display panel, comprising a first substrate and a second substrate;

a back light module having a first side and a second side which are opposite to each other wherein the display panel is disposed at the first side of the back light module;

a first sensing electrode, disposed at the first side of the back light module; and

second sensing electrode, wherein at least part of the second sensing electrode is disposed at the second side of the back light module and is separated from the first sensing electrode by a predetermined distance.

2. The display device of claim 1, wherein the second sensing electrode is a battery or a frame.

4. The display device of claim 1, wherein the first sensing electrode and the second sensing electrode are configured to detect a force along a normal vector of the display panel, and to output a pressure sensing signal.

5. The display device of claim 2, wherein the second substrate has a first side and a second side which are opposite to each other, the first substrate is disposed at the first side of the second substrate, the back light module is disposed at the second side of the second substrate, and the first sensing electrode is disposed at the second side of the second substrate.

6. The display device of claim 5, further comprising a polarizer which is disposed between the second substrate and the first sensing electrode.

7. The display device of claim 1, further comprising a touch module, and the touch module is an embedded touch module or an out-cell touch module.

8. The display dev of claim 5, wherein the display device has a display area and a non-display area, and the first sensing electrode is disposed in the display area.

9. The display device of claim 1, further comprising touch module, wherein the touch module comprises a touch sensing electrode, and the first substrate has a first side and a second side which are opposite to each other,

wherein the touch sensing electrode is disposed at one of the first side and the second side of the first substrate.

10. The display device of claim 1, further comprising a touch module, wherein the touch module comprises two touch sensing electrodes, and the first substrate has a first side and a second side which are opposite to each other,

wherein the touch sensing electrodes are respectively disposed at the first side and the second side of the first substrate.

11. The display device of claim 1, further comprising a touch module, wherein the touch module comprises two touch sensing electrodes,

wherein the touch sensing electrodes are respectively disposed on the first substrate and on the second substrate.

13. The display device of claim 1, wherein the first sensing electrode is a patterned sensing electrode.

14. The display device of claim 1, wherein the first sensing electrode is formed of one of indium tin oxide, metal mesh, and nano-meter metal wire.

15. The display device of claim 1, wherein the second sensing electrode is a conductor.

3. The display device of claim further comprising a touch module, wherein the touch module comprises a glass substrate, and the glass substrate has a first side and a second side which are opposite to each other,

wherein the display panel is disposed between the touch module and the back light module and disposed at the second side of the glass substrate,

wherein the display device has a display area and a non-display area, the first sensing electrode is disposed at the second side of the glass substrate and disposed in the non-display area.

12. The display device of claim 3, wherein the touch module comprises a black matrix, and the black matrix is disposed between the glass substrate and the first sensing electrode.

16. An electronic device comprising a display device with pressure sensing, the display device comprising:

a display panel, comprising a first substrate and a second substrate;

a back light module, having a first side and a second side which are opposite to each other, wherein the display panel is disposed at the first side of the back light module;

a first sensing electrode, disposed at the first side of the back light module; and

a second sensing electrode, wherein at least part of the second sensing electrode is disposed at the second side of the back light module and is separated from the first sensing electrode by a predetermined distance.

17. The electronic device of claim 16, wherein the second sensing electrode is a battery or a frame.

18. The electronic device of claim 17, wherein the display device further comprises a touch module, the touch module comprises a glass substrate, and the glass substrate has a first side and a second side which are opposite to each other,

wherein the display panel is disposed between the touch module and the back light module and is disposed at the second side of the glass substrate,

wherein the display device a display area and a non-display area, and the first sensing electrode is disposed at the second side of the glass substrate and in the non-display area.

19. The electronic device of claim 16, wherein the first sensing electrode and the second sensing electrode are configured to detect a force along a normal vector of the display panel, and to output a pressure sensing signal.

20. The electronic device of claim 17, wherein the second substrate has a first side and a second side which are opposite to each other, the first substrate is disposed at the first side of the second substrate, the back light module is disposed at the second side of the second substrate, and the first sensing electrode is disposed at the second side of the second substrate.