PRESSURE DETECTION MODULE AND TOUCH INPUT DEVICE INCLUDING THE SAME

• US 20160299598A1
• Filed: 11/03/2015
• Published: 10/13/2016
• Est. Priority Date: 04/13/2015
• Status: Active Grant

• Current Assignee: HiDeep Inc.
• Original Assignee: HiDeep Inc.
• Inventors: KWON, Sunyoung, MOON, Hojun, KIM, Taehoon, LEE, Won Woo, YOON, Sangsic, KIM, Seyeob, KIM, Bonkee
• Granted Patent: US 11,042,057 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A pressure detection module may be provided that includes: a first electrode and a second electrode which are located on an insulation layer; and an elastic foam. The elastic foam is located between the first and the second electrodes and a reference potential layer located apart from the pressure detection module. A capacitance between the first electrode and the second electrode is changed according to a relative distance change between the reference potential layer and the first and the second electrodes through a transformation of the elastic foam. A magnitude of a pressure which causes the elastic foam to be transformed is detected according to the capacitance change.

Claims

1. A pressure detection module comprising:

a first electrode and a second electrode which are located on an insulation layer; and

an elastic foam,

wherein the elastic foam is located between the first and the second electrodes and a reference potential layer located apart from the pressure detection module,

wherein a capacitance between the first electrode and the second electrode is changed according to a relative distance change between the reference potential layer and the first and the second electrodes through a transformation of the elastic foam,

and wherein a magnitude of a pressure which causes the elastic foam to be transformed is detected according to the capacitance change.

2. The pressure detection module of claim 1, wherein the pressure detection module is attached to a touch input device comprising a substrate and a display module in such a manner as to be attached to any one of a side of the substrate, which faces the display module and a side of the display module, which faces the substrate.

3. The pressure detection module of claim 2, wherein the reference potential layer is the substrate or the display module.

4. The pressure detection module of claim 1, wherein the elastic foam comprises at least any one of polyurethane, polyester, polypropylene, and acrylic.

5. The pressure detection module of claim 1, wherein the elastic foam is formed to have a thickness of from 10 μ

m to 1 mm.

6. The pressure detection module of claim 1, wherein the elastic foam comprises a hole formed therein to have a length as long as the thickness of the elastic foam.

7. The pressure detection module of claim 1, wherein the first electrode and the second electrode constitute a plurality of channels.

8. The pressure detection module of claim 7, wherein the pressure detection module is able to detect a pressure of each of multi touch by using the plurality of channels.

9. The pressure detection module of claim 2, wherein the elastic foam is transformed by the bending of the display module.

10. A pressure detection module comprising:

an electrode which is located on an insulation layer; and

an elastic foam,

wherein the elastic foam is located between the electrode and a reference potential layer located apart from the pressure detection module,

wherein a capacitance between the electrode and the reference potential layer is changed according to a relative distance change between the reference potential layer and the electrode through a transformation of the elastic foam,

and wherein a magnitude of a pressure which causes the elastic foam to be transformed is detected according to the capacitance change.

11. The pressure detection module of claim 10, wherein the pressure detection module is attached to a touch input device comprising a substrate and a display module in such a manner as to be attached to any one of a side of the substrate, which faces the display module and a side of the display module, which faces the substrate.

12. The pressure detection module of claim 11, wherein the reference potential layer is the substrate or the display module.

13. The pressure detection module of claim 10, wherein the elastic foam comprises at least any one of polyurethane, polyester, polypropylene, and acrylic.

14. The pressure detection module of claim 10, wherein the elastic foam is formed to have a thickness of from 10 μ

m to 1 mm.

15. The pressure detection module of claim 10, wherein the elastic foam comprises a hole formed therein to have a length as long as the thickness of the elastic foam.

16. The pressure detection module of claim 10, wherein the electrode constitutes a plurality of channels.

17. The pressure detection module of claim 16, wherein the pressure detection module is able to detect a pressure of each of multi touch by using the plurality of channels.

18. The pressure detection module of claim 11, wherein the elastic foam is transformed by the bending of the display module.

19. A pressure detection module comprising:

a first electrode which is located on a first insulation layer;

a second electrode which is located on a second insulation layer; and

an elastic foam which is located between the first electrode and the second electrode,

wherein a capacitance between the first electrode and the second electrode is changed according to a relative distance change between the first electrode and the second electrode through a transformation of the elastic foam,

and wherein a magnitude of a pressure which causes the elastic foam to be transformed is detected according to the capacitance change.

20. The pressure detection module of claim 19, wherein the pressure detection module is attached to a touch input device comprising a substrate and a display module in such a manner as to be attached to any one of a side of the substrate, which faces the display module and a side of the display module, which faces the substrate.

21. The pressure detection module of claim 19, wherein the elastic foam comprises at least any one of polyurethane, polyester, polypropylene, and acrylic.

22. The pressure detection module of claim 19, wherein the elastic foam is formed to have a thickness of from 10 μ

m to 1 mm.

23. The pressure detection module of claim 19, wherein the elastic foam comprises a hole formed therein to have a length as long as the thickness of the elastic foam.

24. The pressure detection module of claim 19, wherein the first electrode and the second electrode constitute a plurality of channels.

25. The pressure detection module of claim 24, wherein the pressure detection module is able to detect a pressure of each of multi touch by using the plurality of channels.

26. The pressure detection module of claim 20, wherein the elastic foam is transformed by the bending of the display module.