Flexible touch screen panel

• US 9,569,020 B2
• Filed: 12/17/2012
• Issued: 02/14/2017
• Est. Priority Date: 07/30/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Jung-Mok, Han, Kwan-Young, Itakura, Mikiya, Kim, Hyung-Chul, Kim, Chang-Bum, Jo, Jae-Hyung
• Primary Examiner(s): CHOWDHURY, AFROZA Y
• Application Number:
  US13/717,617
• Publication Number:
  US 20140028584A1
• Time in Patent Office: 1,520 Days
• Field of Search: 345/173
• US Class Current: 1/1
• 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 2203/04111 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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: Y10S 977/762 Nanowire or quantum wire, i.e. axially elongated structure having two dimensions of 100 nm or less

Abstract

A flexible touch screen panel in which metal wire sensing patterns are formed as a touch sensor on a first surface of a flexible thin film is provided. The flexible touch screen panel includes a thin film divided into an active area and a non-active area adjacent to the active area, sensing patterns in the active area on a first surface of the thin film, and sensing lines in the non-active area on the first surface of the thin film and connected to the sensing patterns. The sensing patterns include nanowire.

Claims

1. A flexible touch screen panel comprising:

a thin film having a rectangular active area extending in a row direction and a column direction, and a non-active area adjacent to the active area;

nanowire sensing cells each comprising a first stacked structure comprising a same first conductive layer and a same first photosensitive organic layer between a first surface of the thin film and the first conductive layer, the nanowire sensing cells comprising;

first nanowire sensing cells connected to each other in rows in the row direction; and

second nanowire sensing cells electrically insulated from the first nanowire sensing cells and connected to each other in columns in the column direction;

first nanowire connecting lines connecting row-wise adjacent said first nanowire sensing cells to each other;

second nanowire connecting lines connecting column-wise adjacent said second nanowire sensing cells to each other; and

sensing lines in the non-active area on the first surface of the thin film and connected to the rows of first nanowire sensing cells and the columns of second nanowire sensing cells,

wherein the first conductive layer is patterned in a region between the first and second nanowire sensing cells to expose the first photosensitive organic layer.

2. The flexible touch screen panel according to claim 1, wherein the first conductive layer comprises silver nanowire (AgNW).

3. The flexible touch screen panel according to claim 1, further comprising an insulating layer at crossing regions of the first and second nanowire connecting lines.

4. The flexible touch screen panel according to claim 1, further comprising a polarizing layer coated on a second surface of the thin film.

5. The flexible touch screen panel according to claim 4, wherein the polarizing layer comprises a thin crystal film polarizer.

6. The flexible touch screen panel according to claim 1, wherein the thin film comprises a retardation film.

7. The flexible touch screen panel according to claim 6, wherein the thin film is a quarter-wave plane having a retardation function and comprising a polycarbonate (PC) film, an oriented polypropylene (OPP) film, or a poly vinyl alcohol (PVA) film.

8. The flexible touch screen panel according to claim 6, wherein the retardation film comprises a stacked structure of a plurality of retardation films.

9. The flexible touch screen panel according to claim 8, wherein retardation values of the plurality of retardation films are different from each other.

10. The flexible touch screen panel according to claim 1, wherein the thin film comprises a retardant polycarbonate (PC) film or a cyclic polyolefin (COP) film.

11. A flexible touch screen panel comprising:

a thin film having a rectangular active area extending in a row direction and a column direction, and a non-active area adjacent to the active area;

nanowire sensing cells each comprising a first stacked structure comprising a same first conductive layer and a same first photosensitive organic layer between a first surface of the thin film and the first conductive layer, the nanowire sensing cells comprising;

first nanowire sensing cells connected to each other in rows in the row direction; and

second nanowire sensing cells electrically insulated from the first nanowire sensing cells and connected to each other in columns in the column direction;

first nanowire connecting lines connecting row-wise adjacent said first nanowire sensing cells to each other;

second nanowire connecting lines connecting column-wise adjacent said second nanowire sensing cells to each other;

sensing lines in the non-active area on the first surface of the thin film and connected to the rows of first nanowire sensing cells and the columns of second nanowire sensing cells; and

an insulating layer at crossing regions of the first and second nanowire connecting lines,

wherein the first nanowire connecting lines are on the insulating layer and comprise a second stacked structure of a second conductive layer and a second photosensitive organic layer.

12. The flexible touch screen panel according to claim 11, wherein the second conductive layer comprises silver nanowire (AgNW).

13. The flexible touch screen panel according to claim 11, wherein the first conductive layer is patterned in a region between the first and second nanowire sensing cells to expose the first photosensitive organic layer.