Touch display device and method of manufacturing the same

• US 9,239,656 B2
• Filed: 09/25/2013
• Issued: 01/19/2016
• Est. Priority Date: 12/24/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kwon, Keuk-Sang, Kim, Soo-Hwan
• Primary Examiner(s): Nguyen, Sang V
• Application Number:
  US14/036,184
• Publication Number:
  US 20140176826A1
• Time in Patent Office: 846 Days
• Field of Search: 349/12, 345/173, 445/24
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 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 display device and method of manufacturing a touch display device are provided. The touch display device includes: a display panel, an adhesive material layer on the display panel, a touch panel on the adhesive material layer, the touch panel including: a base film, a first touch electrode on a bottom surface of the base film, a second touch electrode on a top surface of the base film, and an insulating pattern at an edge portion of the bottom surface of the base film, and a cover glass on the touch panel.

Claims

1. A touch display device, comprising:

a display panel, comprising;

a display region; and

a non-display region;

an adhesive material layer on the display panel;

a touch panel on the adhesive material layer, the touch panel comprising;

a base film;

a first touch electrode on a bottom surface of the base film facing the display panel, the first touch electrode comprising an exposed portion in the non-display region;

a second touch electrode on a top surface of the base film; and

an insulating pattern at an edge portion of the bottom surface of the base film; and

a cover glass on the touch panel,

wherein the adhesive material layer is disposed at a central portion of the bottom surface of the base film not covering the exposed portion of the first touch electrode,

wherein the insulating pattern is disposed around the adhesive material layer to cover the exposed portion of the first touch electrode,

wherein a flexible printed circuit board overlaps the insulating pattern and the exposed portion,

wherein the insulating pattern is disposed between the exposed portion and the flexible printed circuit board, and

wherein an anisotropic conductive film fills a space between the base film and the flexible printed circuit board.

2. The touch display device of claim 1, wherein a thickness of the insulating pattern is smaller than a thickness of the adhesive material layer.

3. The touch display device of claim 1, wherein:

a first connection line connected to the first touch electrode is formed at the edge portion of the bottom surface of the base film; and

the insulating pattern covers the first touch electrode and the first connection line.

4. The touch display device of claim 3, wherein the flexible printed circuit board is connected to the exposed portion of the first connection line.

5. The touch display device of claim 4, wherein:

the first touch electrode comprises a single-layered structure of a transparent conductive material layer; and

the first connection line comprises;

a double-layered structure of a transparent conductive material layer; and

a metallic material layer on the transparent conductive material layer.

6. The touch display device of claim 5, wherein the transparent conductive material layer of the first touch electrode comprises a same layer and a same material as the transparent conductive material layer of the first connection line.

7. The touch display device of claim 1, wherein:

the insulating pattern comprises a first thickness; and

the anisotropic conductive film comprises a second thickness equal to or greater than the first thickness.

8. The touch display device of claim 7, wherein:

the first thickness is within a range of about 5 μ

m to about 10 μ

m; and

the second thickness is within a range of about 5 μ

m to about 20 μ

m.

9. The touch display device of claim 1, wherein the insulating pattern comprises an acrylic resin.

10. The touch display device of claim 1, further comprising an adhesive film configured to attach the touch panel and the cover glass.

11. The touch display device of claim 1, wherein:

the first touch electrode, at a central portion of the bottom surface of the base film, is in direct contact with the adhesive material layer; and

the insulating pattern disposed around the central portion.

12. A method of forming a touch display device, the method comprising:

providing a display panel, the display panel comprising;

a display region; and

a non-display region;

forming an adhesive material layer on the display panel;

forming a touch panel on the adhesive material layer, the forming a touch panel comprising;

forming a base film;

forming a first touch electrode on a bottom surface of the base film facing the display panel, the first touch electrode comprising an exposed portion in the non-display region;

forming a second touch electrode on a top surface of the base film; and

forming an insulating pattern at an edge portion of the bottom surface of the base film; and

providing a cover glass on the touch panel,

wherein the adhesive material layer is disposed at a central portion of the bottom surface of the base film not covering the exposed portion of the first touch electrode, and

wherein the insulating pattern is disposed around the adhesive material layer to cover the exposed portion of the first touch electrode,

wherein a flexible printed circuit board overlaps the insulating pattern and the exposed portion,

wherein the insulating pattern is disposed between the base film and the flexible printed circuit board, and

wherein an anisotropic conductive film fills a space between the exposed portion and the flexible printed circuit board.

13. The method of claim 12, wherein a thickness of the insulating pattern is smaller than a thickness of the adhesive material layer.

14. The method of claim 12, wherein:

a first connection line connected to the first touch electrode is formed at the edge portion of the bottom surface of the base film; and

the insulating pattern covers the first touch electrode and the first connection line.

15. The method of claim 14, wherein the flexible printed circuit board is connected to the exposed portion of the first connection line.

16. The method of claim 15, wherein:

the forming the first touch electrode comprises forming a single-layered structure of a transparent conductive material layer; and

the forming the first connection line comprises;

forming a double-layered structure of a transparent conductive material layer; and

forming a metallic material layer on the transparent conductive material layer.

17. The method of claim 16, wherein the transparent conductive material layer of the first touch electrode comprises a same layer and a same material as the transparent conductive material layer of the first connection line.

18. The method of claim 12, wherein:

the insulating pattern comprises a first thickness; and

the anisotropic conductive film comprises a second thickness equal to or greater than the first thickness.