Touch panel

• US 10,228,580 B2
• Filed: 12/28/2015
• Issued: 03/12/2019
• Est. Priority Date: 12/30/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Oem, Seong Su, You, Young Sun, Lee, Jin Woong, Lee, Chung Wan, Jin, Kwang Yong, Choi, Yong Jae
• Primary Examiner(s): Haley, Joseph R
• Application Number:
  US15/539,869
• Publication Number:
  US 20170351131A1
• Time in Patent Office: 1,170 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/1343 Electrodes reflective electrodes G02F1/133553
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• 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 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 3/047 using sets of wires, e.g. crossed wires

Abstract

The present invention relates to a touch panel and, more particularly, to a touch panel comprising: a substrate, which is divided into a valid area and an invalid area; sensing electrodes disposed in the valid area, thereby sensing a first input; touch electrodes disposed in the valid area so as not to overlap with the sensing electrode, thereby sensing a second input; first wirings disposed in the invalid area and connected to the sensing electrodes; and second wirings disposed in the invalid area and connected to the touch electrodes, wherein the touch electrodes are mesh form and disposed between the sensing electrodes, and each second wiring surrounds at least one sensing electrode and is electrically connected in a loop form.

Claims

1. A touch panel, comprising:

a substrate which is divided into a view area and a non-view area;

sensing electrodes which are disposed in the view area and sense a first input;

touch electrodes which are disposed to not overlap the sensing electrodes in the view area and sense a second input;

first wirings which are disposed in the non-view area and connected to one end of the sensing electrodes; and

second wirings which are disposed in the non-view area and connected to both ends of the touch electrodes,

wherein the touch electrodes have a mesh form and are disposed between the sensing electrodes, and

each second wiring surrounds at least one sensing electrode and is electrically connected in a loop form, and

wherein the sensing electrode has a mesh form, and

an opening ratio of the mesh form of the touch electrode is 0.8 to less than 1 times and greater than 1 to 1.2 times an opening ratio of the mesh form of the sensing electrode.

2. The touch panel of claim 1, wherein in a mesh line formed from a boundary of the touch electrode on one side to a boundary of the touch electrode on the other side, a number of nodes is 3 or more to 10 or less.

3. The touch panel of claim 2, wherein the nodes comprise a contact point at a boundary of the mesh line and the touch panel.

4. The touch panel of claim 2, wherein a distance between the nodes is 200 to 600 um.

5. The touch panel of claim 1, wherein in the view area, a plurality of touch electrodes is disposed between adjacent sensing electrodes.

6. The touch panel of claim 5, wherein in the view area, two touch electrodes are disposed between adjacent sensing electrodes.

7. The touch panel of claim 6, wherein a mesh line formed from a boundary of each of two electrodes disposed between adjacent sensing electrodes on one side to a boundary of each of the two electrodes on the other side comprises at least three nodes.

8. The touch panel of claim 1, wherein the sensing electrodes and the touch electrodes are disposed in an identical layer in the view area.