Touch screen panel

• US 9,990,098 B2
• Filed: 11/23/2016
• Issued: 06/05/2018
• Est. Priority Date: 02/05/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kang, Sung-Ku, Lee, Choon-Hyop, Lee, Jeong-Heon
• Primary Examiner(s): CERULLO, LILIANA P
• Application Number:
  US15/360,866
• Publication Number:
  US 20170075458A1
• Time in Patent Office: 559 Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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 3/0445 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

Abstract

A touch screen panel includes a substrate having a first surface and a second surface opposite the first surface, a plurality of first sensing electrodes coupled in a first direction, and a plurality of second sensing electrodes coupled in a second direction crossing the first direction, the first and second sensing electrodes being on the first surface, a plurality of third sensing electrodes overlapping the first sensing electrodes, a plurality of fourth sensing electrodes overlapping the second sensing electrodes, the third and fourth sensing electrodes being on the second surface, wherein the sensing electrodes on the first surface and the sensing electrodes on the second surface overlapping each other are electrically coupled to each other through coupling units for coupling the first surface of the substrate and the second surface of the substrate to each other.

Claims

1. A touch screen panel comprising:

a substrate having a first surface and a second surface opposite the first surface;

a plurality of first sensing electrodes on the first surface of the substrate and coupled in a first direction;

a plurality of second sensing electrodes arranged between the first sensing electrodes and coupled in a second direction crossing the first direction;

a plurality of first coupling patterns coupling the first sensing electrodes in the first direction and having a smaller width than the first sensing electrodes;

a plurality of second coupling patterns alternating with the first coupling patterns, coupling the second sensing electrodes in the second direction, and having a smaller width than the second sensing electrodes;

a plurality of third sensing electrodes on the second surface of the substrate and overlapping the first sensing electrodes;

a plurality of fourth sensing electrodes arranged between the third sensing electrodes and overlapping the second sensing electrodes;

a plurality of third coupling patterns coupling the third sensing electrodes in the first direction and having a smaller width than the third sensing electrodes; and

a plurality of fourth coupling patterns alternating with the third coupling patterns, coupling the fourth sensing electrodes in the second direction and having a smaller width than the fourth sensing electrodes,

wherein the sensing electrodes on the first surface and the sensing electrodes on the second surface overlapping each other are electrically coupled to each other through coupling units for coupling the first surface of the substrate and the second surface of the substrate to each other.

2. The touch screen panel as claimed in claim 1,

wherein the first coupling patterns in the first surface of the substrate and the fourth coupling patterns on the second surface of the substrate alternate with each other, and

wherein the second coupling patterns on the first surface of the substrate and the third coupling patterns on the second surface of the substrate alternate with each other.

3. The touch screen panel as claimed in claim 2, wherein the coupling patterns arranged to cross each other are limited to a central area of the substrate.

4. The touch screen panel as claimed in claim 1, wherein the sensing electrodes comprise parts that extend to inside of the coupling units to contact the sensing electrodes on the opposite surface of the substrate.

5. The touch screen panel as claimed in claim 4, wherein the sensing electrodes comprise regions opened by the coupling units.

6. The touch screen panel as claimed in claim 1, wherein the sensing electrodes and the coupling patterns comprise a transparent electrode material.

7. The touch screen panel as claimed in claim 1, further comprising outside wiring lines for coupling the first sensing electrodes and the second sensing electrodes to an external driving circuit through units of lines in the first direction and the second direction, respectively.

8. The touch screen panel as claimed in claim 1, wherein the first and second sensing electrodes are at a same layer.

9. The touch screen panel as claimed in claim 1, wherein the substrate is a thin film substrate comprising at least one selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC), acryl, polymethylmethacrylate (PMMA), triacetyl cellulose (TAC), polyethersulfone (PES), and polyimide (PI).