Touchscreen and touch panel display and producing method thereof

• US 8,988,371 B2
• Filed: 02/07/2012
• Issued: 03/24/2015
• Est. Priority Date: 10/31/2011
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: HannStar Display Corporation
• Inventors: Ho, Wei-Hsuan
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): ZUBAJLO, JENNIFER L
• Application Number:
  US13/368,016
• Publication Number:
  US 20130106726A1
• Time in Patent Office: 1,141 Days
• Field of Search: 345/156, 345/173
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0445 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

Embodiments of this invention provide touch panel display, touchscreen and their producing method. In an embodiment, the touch panel display comprises a display and a touchscreen, which comprises two substrates, whose surface respectively comprise sensing patterns. In addition, conductive circuits are arranged at one of the two substrates, to connect the sensing patterns by direct or indirect manner.

Claims

1. A touchscreen, comprising:

a first substrate having a first surface;

a second substrate having a second surface facing the first surface;

an insulating layer disposed between the first substrate and the second substrate;

a plurality of first sensing patterns disposed between the first substrate and the insulating layer;

a plurality of conductive wires disposed between the first substrate and the insulating layer;

a plurality of second sensing patterns disposed between the second substrate and the insulating layer;

a conductive component electrically connecting the second sensing patterns and the conductive wires; and

a printed circuit board electrically connecting the conductive wires and having conductive traces laid only on its one surface;

wherein the second surface of the second substrate is free of conductive wires; and

wherein the conductive wires comprise a first portion and a second portion, the first sensing patterns connect with the first portion, and the second sensing patterns connect with the second portion via the conductive component; and

wherein the first sensing patterns and the second sensing patterns are used for generating a plurality of touch signals, and the touch signals are transmitted to the printed circuit board via the conductive wires.

2. The touchscreen as recited in claim 1, wherein the conductive component comprises a plurality of contacts, each of the second sensing patterns comprises a pad, and one contact connects with one pad.

3. The touchscreen as recited in claim 1, wherein the conductive component further comprises an adhesive portion for bonding the first substrate and the second substrate.

4. The touchscreen as recited in claim 1, wherein the first substrate is used as a cover lens facing a user.

5. The touchscreen as recited in claim 1, wherein the first substrate is a glass substrate, and the second substrate is a plastic substrate.

6. The touchscreen as recited in claim 1, wherein the second substrate is used a cover lens facing a user.

7. The touchscreen as recited in claim 1, wherein the conductive component comprises an anisotropic conductive film or an anisotropic conductive paste.

8. The touchscreen as recited in claim 1, wherein the first substrate and the second substrate are made of one or more materials selected from a group consisted of glass, polyethylene terephthalate (PET), polycarbonate (PC), polyether sulfone (PES), triacetyl cellulose (TAC), polymethylmethacrylate (PMMA), polyethylene (PE), polyimide (PI), and combinations thereof.

9. The touchscreen as recited in claim 1, further comprising an optical layer disposed between the first sensing patterns and the first substrate or between the second sensing patterns and the second substrate, the optical layer being used to obscure the profiles of the first sensing patterns and the second sensing patterns by locally altering the refractive index.

10. The touchscreen as recited in claim 1, wherein the conductive wires have a loop-shaped configuration.

11. The touchscreen as recited in claim 1, wherein a surface area of the insulating layer is smaller than a surface area of the second substrate, and the insulating layer has an opening and the conductive component and the conductive wires are electrically connected within the opening.

12. A touch panel display, comprising:

a display, for presenting a visual information; and

a touchscreen, allowing a user to perform operations by touching and comprising;

a first substrate having a first surface;

a second substrate having a second surface facing the first surface;

an insulating layer disposed between the first substrate and the second substrate;

a plurality of first sensing patterns disposed between the first substrate and the insulating layer;

a plurality of conductive wires disposed between the first substrate and the insulating layer;

a plurality of second sensing patterns disposed between the second substrate and the insulating layer;

a conductive component electrically connecting the second sensing patterns and the conductive wires;

a printed circuit board electrically connecting the conductive wires and having conductive traces laid only on its one surface;

wherein the second surface of the second substrate is free of conductive wires; and

wherein the conductive wires comprise a first portion and a second portion, the first sensing patterns connect with the first portion, and the second sensing patterns connect with the second portion via the conductive component; and

wherein the first sensing patterns and the second sensing patterns are used for generating a plurality of touch signals, and the touch signals are transmitted to the printed circuit board via the conductive wires.

13. The touch panel display as recited in claim 12, wherein the conductive component comprises a plurality of contacts, each of the second sensing patterns comprises a pad, and one contact connects with one pad.

14. The touch panel display as recited in claim 12, wherein the conductive component further comprises an adhesive portion for bonding the first substrate and the second substrate.

15. The touch panel display as recited in claim 12, wherein the first substrate is a glass substrate, and the second substrate is a plastic substrate.

16. A method for producing a touchscreen, comprising the steps of:

providing a first substrate having a first surface and a second substrate having a second surface, the first surface facing the second surface;

providing an insulating layer between the first substrate and the second substrate;

forming a plurality of first sensing patterns between the first substrate and the insulating layer;

forming a plurality of second sensing patterns between the second substrate and the insulating layer;

forming a plurality of conductive wires between the first substrate and the insulating layer, wherein the conductive wires comprises a first portion connected with the first sensing patterns and a second portion connected with the second sensing patterns via at least a conductive component, and the second surface of the second substrate is free of conductive wires;

providing a printed circuit board electrically connecting the conductive wires and having conductive traces laid only on its one surface, wherein the first sensing patterns and the second sensing patterns are used for generating a plurality of touch signals, and the touch signals are transmitted to the printed circuit board via the conductive wires; and

bonding the first substrate and the second substrate.

17. The method as recited in claim 16, wherein the conductive component comprises:

a conductive portion, for connecting the second sensing patterns and the second portion; and

an adhesive portion, for bonding the first substrate and the second substrate.

18. The method as recited in claim 16, wherein the first substrate is a glass substrate, and the second substrate is a plastic substrate.