TRANSPARENT ADHESIVE UNIT AND TOUCH SCREEN HAVING THE SAME

• US 20120306791A1
• Filed: 06/01/2012
• Published: 12/06/2012
• Est. Priority Date: 06/02/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Sehf-Korea Co., Ltd. (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Yeong-Seop, LEE, Myung-Sop, CHO, Yong-Gu
• Granted Patent: US 9,535,517 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

A transparent adhesive unit for a touch screen is provided. The transparent adhesive unit includes a transparent film, a noise-blocking layer located on a first surface of the transparent film and formed of a conductive material, a first adhesive layer located on a surface of the noise-blocking layer, and a second adhesive layer located on a second surface of the transparent film, in which the second surface is positioned in opposition to the first surface.

Claims

1. A transparent adhesive unit for a touch screen, the transparent adhesive unit comprising:

a transparent film;

a noise-blocking layer located on a first surface of the transparent film and formed of a conductive material;

a first adhesive layer located on a surface of the noise-blocking layer; and

a second adhesive layer located on a second surface of the transparent film, the second surface being positioned in opposition to the first surface.

2. The transparent adhesive unit of claim 1, further comprising a noise-blocking auxiliary layer located on the surface of the noise-blocking layer and formed of a conductive material.

3. The transparent adhesive unit of claim 2, wherein a first portion of the noise-blocking auxiliary layer is encapsulated by the first adhesive layer.

4. The transparent adhesive unit of claim 3, wherein the first portion of the noise-blocking auxiliary layer has a closed loop shape.

5. The transparent adhesive unit of claim 4, wherein the closed loop shape comprises a closed quadrangular shape.

6. The transparent adhesive unit of claim 4, wherein the noise-blocking auxiliary layer includes a second portion extending from the first portion.

7. The transparent adhesive unit of claim 1, wherein the noise-blocking layer comprises at least one of Indium Tin Oxide (ITO), Zinc Oxide (ZnO), a conductive polymer, Carbon NanoTube (CNT), Zinc Tin Oxide (ZTO), Gallium Zinc Oxide (GZO), Aluminum Zinc Oxide (AZO), Indium Zinc Oxide (IZO), a Titanium Dioxide-Niobium material (TiO2:

Nb), a Magnesium Hydroxide-Carbon material (Mg(OH)₂;

C), and Silver (Ag).

8. The transparent adhesive unit of claim 7, wherein an electrical conductivity of the noise-blocking auxiliary layer is higher than an electrical conductivity of the noise-blocking layer.

9. A touch screen comprising:

a display unit comprising a plurality of pixels for displaying an image through the plurality of pixels;

a touch panel comprising a protection plate exposed on a front surface of the touch screen and a conductive layer deposited on the protection plate; and

a transparent adhesive unit for coupling the display unit and the touch panel to each other,

wherein the transparent adhesive unit comprises;

a transparent film;

a noise-blocking layer located on a first surface of the transparent film and formed of a conductive material;

a first adhesive layer located on a surface of the noise-blocking layer; and

a second adhesive layer located on a second surface of the transparent film, the second surface being positioned in opposition to the first surface.

10. The touch screen of claim 9, wherein the transparent adhesive unit further comprises a noise-blocking auxiliary layer located on the surface of the noise-blocking layer and formed of a conductive material.

11. The touch screen of claim 10, wherein a first portion of the noise-blocking auxiliary layer is encapsulated by the first adhesive layer.

12. The touch screen of claim 11, wherein the first portion of the noise-blocking auxiliary layer has a closed loop shape.

13. The touch screen of claim 12, wherein the closed loop shape comprises a closed quadrangular shape.

14. The touch screen of claim 12, wherein the noise-blocking auxiliary layer includes a second portion extending from the first portion.

15. The touch screen of claim 9, wherein the noise-blocking layer comprises at least one of Indium Tin Oxide (ITO), Zinc Oxide (ZnO), a conductive polymer, Carbon NanoTube (CNT), Zinc Tin Oxide (ZTO), Gallium Zinc Oxide (GZO), Aluminum Zinc Oxide (AZO), Indium Zinc Oxide (IZO), a Titanium Dioxide-Niobium material (TiO₂:

Nb), a Magnesium Hydroxide-Carbon material (Mg(OH)₂;

C), and Silver (Ag).

16. The touch screen of claim 15, wherein an electrical conductivity of the noise-blocking auxiliary layer is higher than an electrical conductivity of the noise-blocking layer.