Contact sensitive device, display apparatus including the same and method of manufacturing display apparatus

Patent metadata

Field	Value
Publication number	US-2017192507-A1
Application number	US-201615355922-A
Country	US
Kind code	A1
Filing date	Nov 18, 2016
Priority date	Dec 31, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

Provided is a contact sensitive device. The contact sensitive device includes an electroactive layer, a plurality of first electrodes, a plurality of second electrodes, and a bonding layer. The plurality of first electrodes is disposed on one surface of the electroactive layer and the plurality of second electrodes is disposed on the other surface of the electroactive layer. The bonding layer covers one surface of the electroactive layer and consists of a first part corresponding to the plurality of first electrodes and a second part excluding the first part. The first part and the second part of the bonding layer have different elastic moduli.

First claim

What is claimed is:

1 . A contact sensitive device, comprising:
an electroactive layer; a plurality of first electrodes on one surface of the electroactive layer; a plurality of second electrodes on another surface of the electroactive layer; and a bonding layer on the one surface of the electroactive layer, the bonding layer including a first part corresponding to the plurality of first electrodes and a second part excluding the first part, wherein the first part and the second part have different elastic modulus.

2 . The contact sensitive device according to claim 1 , wherein the first part and the second part are one continuous layer.

3 . The contact sensitive device according to claim 1 , wherein an elastic modulus of the first part is higher than an elastic modulus of the second part.

4 . The contact sensitive device according to claim 1 , wherein an elastic modulus of the first part is 20 to 500 times higher than an elastic modulus of the second part.

5 . The contact sensitive device according to claim 1 , wherein an elastic modulus of the first part is 10 MPa to 60 MPa.

6 . The contact sensitive device according to claim 5 , wherein an elastic modulus of the second part is 0.05 MPa to 0.50 MPa.

7 . The contact sensitive device according to claim 6 , wherein a pencil hardness of the first part is 5B or higher and a pencil hardness of the second part is 3B or lower.

8 . The contact sensitive device according to claim 1 , wherein the first part of the bonding layer corresponds to an overlapping area where the plurality of first electrodes and the plurality of second electrodes overlap with each other.

9 . A display apparatus, comprising:
a display panel; a contact sensitive device on the display panel, the contact sensitive device including an electroactive layer, a first electrode on one surface of the electroactive layer, and a bonding layer on the first electrode; and a cover window on the contact sensitive device, wherein the bonding layer includes a first part between the first electrode and the cover window and a second part between the one surface of the electroactive layer and the cover window, and wherein the first part and the second part have different elastic moduli.

10 . The display apparatus according to claim 9 , wherein an elastic modulus of the first part is higher than an elastic modulus of the second part.

11 . The display apparatus according to claim 9 , wherein an elastic modulus of the first part is 20 to 500 times higher than an elastic modulus of the second part.

12 . The display apparatus according to claim 9 , wherein an adhesive strength of the bonding layer is 4 N/cm 2 or higher.

13 . The display apparatus according to claim 9 , wherein a thickness of the bonding layer is 20 μm to 100 μm.

14 . The display apparatus according to claim 9 , further comprising:
a touch device between the contact sensitive device and the cover window, between the contact sensitive device and the display panel, or in the display panel.

15 . A method of manufacturing a display apparatus, the method comprising:
applying a ultra violet (UV) curing resin onto one surface of an electroactive layer to cover an electrode on one surface of the electroactive layer; disposing a touch device on the UV curing resin; irradiating a first UV ray having a first energy onto the UV curing resin using a first mask which exposes a first area corresponding to the electrode; irradiating a second UV ray having a second energy lower than the first energy onto the UV curing resin using a second mask which exposes a second area excluding the first area; and bonding a display panel onto another surface of the electroactive layer.

16 . The method according to claim 15 , wherein the first energy is 10 times higher than the second energy.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Yongwoo
• Ham Yong-Su
• Kim Taeheon
• Kho Yuseon
• Lim Myungjin
• Choi Seulgi

Classifications

• G06F3/016 Primary

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title

• G06F2203/04103

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

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• B29C65/4845

  Radiation curing adhesives, e.g. UV light curing adhesives · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title