Touch panel including an elastic intermediate layer

Patent metadata

Field	Value
Publication number	US-9857923-B2
Application number	US-201214354876-A
Country	US
Kind code	B2
Filing date	Oct 29, 2012
Priority date	Oct 27, 2011
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

The touch panel includes a first substrate and a second substrate spaced apart from each other; a position detecting electrode on at least one of the first and second substrates; a pressure detecting electrode on a bottom surface of the first substrate; a wire connecting the position detecting electrode to a substrate; and an intermediate layer being elastically deformed such that a thickness of the intermediate layer is varied.

First claim

The invention claimed is:

1. A capacitive touch panel comprising:
a first substrate, a second substrate below the first substrate, and a third substrate below the second substrate;
a position detecting electrode comprising a first position detecting electrode extending in a first direction, and a second position detecting electrode extending in a second direction crossing the first position detecting electrode;
a pressure detecting electrode comprising a plurality of sub-pressure detecting electrodes on a bottom surface of the first substrate;
a wire connecting the position detecting electrode to a substrate; and
an intermediate layer being elastically deformed such that a thickness of the intermediate layer is varied;
wherein the first position detecting electrode is disposed on the second substrate and the second position detecting electrode is disposed on the third substrate;
wherein the first position detecting electrode is disposed apart from the second positioning electrode,
wherein the sub-pressure detecting electrodes are disposed apart from each other,
wherein the intermediate layer covers the entire bottom surface of the first substrate;
wherein the intermediate layer is in direct physical contact with the position detecting electrode, the pressure detecting electrode, and the wire;
wherein the intermediate layer has a color; and
wherein the intermediate layer insulates the position detecting electrode and the pressure detecting electrode.

2. The capacitive touch panel of claim 1 , wherein a distance between the position detecting electrode and the pressure detecting electrode varies due to the intermediate layer.

3. The capacitive touch panel of claim 1 , wherein the intermediate layer has a light transmittance of 80% or more in a visible ray band.

4. The capacitive touch panel of claim 1 , wherein the intermediate layer has a refractive index in a range of 1.3 to 1.52.

5. The capacitive touch panel of claim 1 , wherein the intermediate layer includes resin.

6. The capacitive touch panel of claim 1 , wherein the intermediate layer includes at least one selected from the group consisting of silicon resin, polyurethane resin, vinyl chloride resin and acrylic resin.

7. The capacitive touch panel of claim 1 , wherein the intermediate layer compensates for a color difference with respect to the pressure detecting electrode or the position detecting electrode.

8. A capacitive touch panel comprising:
a first substrate;
a second substrate below the first substrate;
a position detecting electrode comprising a first position detecting electrode on at least one surface of the first substrate and a second position detecting electrode on at least one surface of the second substrate;
a pressure detecting electrode comprising a plurality of sub-pressure detecting electrodes on a bottom surface of the first substrate;
a wire connecting the position detecting electrode to a substrate;
an intermediate layer disposed below the second substrate; and
an adhesive layer comprising an optically clear adhesive (OCA) between the first substrate and the second substrate;
wherein the intermediate layer is disposed between the touch panel and a liquid crystal panel;
wherein the liquid crystal panel is disposed below the touch panel;
wherein the first position detecting electrode is disposed apart from the second positioning detecting electrode;
wherein the sub-pressure electrodes are disposed apart from each other;
wherein the adhesive layer insulates the first position detecting electrode, the second positioning electrode, and the pressure detecting electrode;
wherein the intermediate layer covers the entire bottom surface of the second substrate;
wherein the intermediate layer has a color;
wherein the intermediate layer is elastically deformed such that a thickness of the intermediate layer varies;
wherein the intermediate layer is formed as a pressure recognizing layer;
wherein the intermediate layer comprises:
a conductive layer; and
a functional layer;

wherein the functional layer comprises:
a first functional layer on a first surface of the conductive layer; and
a second functional layer on a second surface of the conductive layer, the second surface being opposite to the first surface; and

wherein the first functional layer and the second functional layer include an insulation material.

9. The capacitive touch panel of claim 8 , wherein the functional layer further includes a composite of an insulation material and a conductive material.

10. The capacitive touch panel of claim 9 , wherein the insulation material includes resin.

11. The capacitive touch panel of claim 9 , wherein the conductive material includes a material selected from the group consisting of a metal, carbon nano-tubes, and carbon black.

12. The capacitive touch panel of claim 8 , wherein the conductive layer includes a conductive material.

13. The capacitive touch panel of claim 8 , wherein the first position detecting electrode faces the second position detecting electrode.

Assignees

• Lg Innotek Co Ltd

Inventors

• Yun Ji Sun
• Lee Sang Young
• Lee Yong Jin
• Chai Kyoung Hoon

Classifications

• G06F3/045 Primary

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title