Pressure detection module and touch input device including the same

Patent metadata

Field	Value
Publication number	US-2016299598-A1
Application number	US-201514931308-A
Country	US
Kind code	A1
Filing date	Nov 3, 2015
Priority date	Apr 13, 2015
Publication date	Oct 13, 2016
Grant date	—

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.

First claim

What is claimed is:

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 μm 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 μm 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 μm 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.

Assignees

• Hideep Inc

Inventors

• Yoon Sangsic
• Kwon Sunyoung
• Moon Hojun
• Kim Taehoon
• Lee Won Woo
• Kim Seyeob
• Kim Bonkee

Classifications

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F2203/04104

  Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title