Touch panel and display device including the same

• US 8,963,014 B2
• Filed: 08/22/2013
• Issued: 02/24/2015
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Hwang, Ji Young, Hwang, In-Seok, Lee, Seung Heon, Son, Yong Goo, Koo, Beom Mo
• Primary Examiner(s): NGUYEN, HOA CAO
• Application Number:
  US13/973,602
• Publication Number:
  US 20130342504A1
• Time in Patent Office: 551 Days
• Field of Search: 174/250, 174/253, 174/257, 174/261, 345/173, 345/174
• US Class Current: 174/257
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 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 Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present invention relates to a touch panel, comprising: a screen part comprising a first conductive pattern portion, and a router part comprising a second conductive pattern portion, in which the first conductive pattern portion and the second conductive pattern portion have the same line height, and there is no connecting portion in a region in which the first conductive pattern portion and the second conductive pattern portion are connected to each other, and a display apparatus comprising the same.

Claims

1. A touch panel, comprising:

a screen part comprising a first conductive pattern portion; and

a router part comprising a second conductive pattern portion,

wherein the first conductive pattern portion and the second conductive pattern portion have the same line height, and there is no connecting portion in a region where the first conductive pattern portion and the second conductive pattern portion are connected with each other, and

wherein the first conductive pattern portion and the second conductive pattern portion comprise a metallic pattern made of the same material, and

wherein a linear resistance value on the shortest distance from any one side contacting the second conductive pattern portion to the other side facing the one side in any one electrically connected region of the first conductive pattern portion is equal to or larger than a linear resistance value from any one side contacting the first conductive pattern portion to the other side where the second conductive pattern portion contacts a terminal part of the router part, in any one electrically connected region of the second conductive pattern portion.

2. The touch panel of claim 1, wherein in any one electrically connected region of the first conductive pattern portion, a flow direction of electricity in the first conductive pattern portion from any one side of the screen part to the other side facing the one side and an angle of the conductive line of the first conductive pattern portion are different from each other.

3. The touch panel of claim 1, wherein at least a part of the second conductive pattern portion has a line width different from that of the first conductive pattern portion.

4. The touch panel of claim 3, wherein a difference in a line width between at least a part of the second conductive pattern portion and the first conductive pattern portion is 5 micrometers or more.

5. The touch panel of claim 3, wherein a difference in a line width between at least a part of the second conductive pattern portion and the first conductive pattern portion is 15 micrometers or more.

6. The touch panel of claim 3, wherein a difference in a line width between at least a part of the second conductive pattern portion and the first conductive pattern portion is 30 micrometers or more.

7. The touch panel of claim 3, wherein a difference in a line width between at least a part of the second conductive pattern portion and the first conductive pattern portion is 100 micrometers or less.

8. The touch panel of claim 1, wherein the first conductive pattern portion and the second conductive pattern portion are formed by one printing process.

9. The touch panel of claim 8, wherein the printing process is a reverse offset printing process.

10. The touch panel of claim 1, wherein the first conductive pattern portion and the second conductive pattern portion comprise the same laminated structure, and the first conductive pattern portion and the second conductive pattern portion contain the same material.

11. The touch panel of claim 1, wherein the metallic pattern contains one or more metals selected from a group consisting of Ag, Cu, Cr, Al, Mo, Ni, and an alloy thereof.

12. A display apparatus comprising the touch panel of claim 1.

13. The touch panel of claim 1, wherein the first conductive pattern portion and the second conductive pattern portion are blackened.

14. The touch panel of claim 1, further comprising a blackening layer on the first conductive pattern portion and the second conductive pattern portion.