Conductive film, method for manufacturing same, touch panel comprising conductive film, and display device

Patent metadata

Field	Value
Publication number	US-2017351363-A1
Application number	US-201515518173-A
Country	US
Kind code	A1
Filing date	Oct 5, 2015
Priority date	Oct 10, 2014
Publication date	Dec 7, 2017
Grant date	—

Abstract

A conductive film for a touch panel according to an embodiment of the present invention is used for a touch panel and comprises: a base member comprising a concave portion or a protruding portion and having a stepped portion having a pattern corresponding to a pattern for touch sensing in an effective area; and a sensor electrode comprising a sensor electrode portion formed over the stepped portion in the effective area so as to correspond to the same.

First claim

1 . A conductive film for a touch panel comprising:
a base member comprising a stepped part configured as a concave portion or a protruding portion and having a pattern corresponding to a pattern for touch sensing in an active area; and a sensor electrode comprising a sensor electrode part formed on the stepped part so as to correspond to the stepped part in the active area.

2 . The conductive film according to claim 1 , wherein the sensor electrode further comprises an auxiliary electrode part located in an area other than the stepped part so as to be stepped from the sensor electrode part by the stepped part.

3 . The conductive film according to claim 2 , wherein
a non-active area is defined outside the active area, and the sensor electrode part and the auxiliary electrode part are spaced apart from each other on a side surface of the stepped part in the active area.

4 . The conductive film according to claim 3 , wherein the stepped part has a height of 30 um to 300 um.

5 . The conductive film according to claim 3 , wherein an angle formed by opposite side surfaces of the stepped part and a bottom surface of the stepped part in the active area is 80 to 110 degrees.

6 . The conductive film according to claim 3 , wherein the sensor electrode part and the auxiliary electrode part are connected to each other in the non-active area.

7 . The conductive film according to claim 6 , wherein, in the non-active area, an angle of one side surface of the stepped part is 45 degrees or lower, and an angle of the other side surface of the stepped part is 80 to 110 degrees.

8 . The conductive film according to claim 1 , wherein
a non-active area is defined outside the active area, the stepped part has a pattern corresponding to a wire pattern in the non-active area, and a wire electrode is formed on the stepped part in the non-active area so as to correspond to the wire pattern.

9 . The conductive film according to claim 1 , wherein
the stepped part is configured as a protruding portion, and the sensor electrode is located on the protruding portion.

10 . The conductive film according to claim 1 , wherein the sensor electrode comprises a conductor made of a nano-material forming a network structure.

11 . The conductive film according to claim 2 , wherein the sensor electrode part has a smaller thickness than the auxiliary electrode part.

12 . The conductive film according to claim 1 , wherein the sensor electrode part has a thickness of 50 nm to 350 nm.

13 . The conductive film according to claim 2 , wherein a ratio of a thickness of the sensor electrode part to a thickness of the auxiliary electrode part is 1:1.5 to 1:5.

14 . The conductive film according to claim 1 , further comprising an over-coating layer for covering the sensor electrode.

15 . A touch panel comprising:
a conductive film for a touch panel according to claim 1 ; and another sensor electrode formed in a direction in which the another sensor electrode intersects the sensor electrode of the conductive film while being spaced apart from the sensor electrode of the conductive film.

16 . A display device comprising:
a touch panel according to claim 15 ; and a display panel located behind the touch panel for displaying images.

17 . A method of manufacturing a conductive film for a touch panel, the method comprising:
forming a coating layer made of a conductive material over an entirety of a base member comprising a stepped part configured as a concave portion or a protruding portion and having a pattern corresponding to a pattern for touch sensing in an active area; and forming a sensor electrode part located on the stepped part by drying the coating layer so as to be spaced apart from a remaining portion in the active area to form a sensor electrode.

18 . The method according to claim 17 , wherein the step of forming the sensor electrode comprises forming an auxiliary electrode part located in a portion other than the stepped part so as to be spaced apart from the sensor electrode part by the stepped part in the active area.

19 . The method according to claim 17 , wherein
the stepped part is configured as a protruding portion, and the sensor electrode is located on the protruding portion.

20 . The method according to claim 17 , wherein the sensor electrode comprises a conductor made of a nano-material forming a network structure.

Assignees

• Lg Electronics Inc

Inventors

• Lee Jihyun
• Park Jonggoo
• Lyu Jaemin

Classifications

• G06F3/045

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

• C08J7/04

  Coating · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F2203/04103

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title