Capacitive Touch Screen Panel

• US 20110109583A1
• Filed: 09/25/2009
• Published: 05/12/2011
• Est. Priority Date: 02/23/2009
• Status: Abandoned Application

• Current Assignee: E&H. Co., Ltd.
• Original Assignee: E&H. Co., Ltd.
• Inventors: Lee, Yong Hoon
• Application Number:
  US12/747,375
• Publication Number:
  US 20110109583A1
• Time in Patent Office: Days
• US Class Current: 345/174
• 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

Provided is a capacitive touch-screen panel. The capacitive touch-screen panel includes a first substrate having a screen region and an inactive region, a first transparent electrode pattern unit disposed in the screen region of a first lateral surface of the first substrate, a first outer electrode interconnection formed in the inactive region of the first lateral surface of the first substrate and electrically connected to the first transparent electrode pattern unit, a second substrate having a first lateral surface bonded with a second lateral surface of the first substrate using an interlayer adhesive, the second substrate having a screen region and an inactive region, a second transparent electrode pattern unit disposed on the screen region of a second lateral surface of the second substrate, and a second outer electrode interconnection formed in the inactive region of a second lateral surface of the second substrate and electrically connected to the second transparent electrode pattern unit. The capacitive touch-screen panel is configured to sense a touched position with a variation in capacitance due to a contact with the first and second transparent electrode pattern units. As a result, malfunctions from occurring due to a state of contact with an upper portion of an electrode unit of a touch screen and malfunctions and damage from occurring due to scratches and static electricity during a contact with the touch screen may be prevented. Further, the fabrication cost of a touch screen may be efficiently reduced, and the fabrication process of a touch-screen panel may be greatly simplified.

Claims

1. A capacitive touch-screen panel comprising:

a first substrate having a screen region and an inactive region;

a first transparent electrode pattern unit disposed in the screen region of a first lateral surface of the first substrate;

a first outer electrode interconnection formed in the inactive region of the first lateral surface of the first substrate and electrically connected to the first transparent electrode pattern unit;

a second substrate having a first lateral surface bonded with a second lateral surface of the first substrate using an interlayer adhesive, the second substrate having a screen region and an inactive region;

a second transparent electrode pattern unit disposed on the screen region of a second lateral surface of the second substrate; and

a second outer electrode interconnection formed in the inactive region of a second lateral surface of the second substrate and electrically connected to the second transparent electrode pattern unit,

wherein the capacitive touch-screen panel is configured to sense a touched position with a variation in capacitance due to a contact with the first and second transparent electrode pattern units.

4. The capacitive touch-screen panel of any one of claim 1 or claim 2, further comprising:

a transparent substrate having a first lateral surface bonded to the second lateral surface of the second substrate by an interlayer adhesive, the transparent substrate having a screen region and an inactive region; and

a shielding electrode pattern configured to remove a noise signal and disposed in the screen region of a second lateral surface of the transparent substrate.

5. The capacitive touch-screen panel of claim 4, further comprising an outer shielding electrode interconnection disposed in the inactive region of the second lateral surface of the transparent substrate and electrically connected to the shielding electrode pattern.

6. The capacitive touch-screen panel of any one of claim 1 or claim 2, further comprising:

a transparent substrate having a screen region and an inactive region;

a shielding electrode pattern configured to remove a noise signal and disposed in the screen region of a first lateral surface of the transparent substrate; and

an outer shielding electrode pattern disposed in the inactive region of the first lateral surface of the transparent substrate and electrically connected to the shielding electrode pattern,

wherein the first lateral surface of the transparent substrate on which the shielding electrode pattern and the outer shielding electrode interconnection are disposed is bonded to the second lateral surface of the second substrate by an interlayer adhesive.

7. The capacitive touch-screen panel of any one of claim 1 or claim 2, wherein each of the first and second substrates is a transparent film formed of at least one selected from the group consisting of glass, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyimide (PI), and acryl.

15. The capacitive touch-screen panel of any one of claim 1, claim 2, claim 8 or claim 9, wherein each of the first and second transparent electrode pattern units is formed of at least one selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), aluminum (Al)-doped ZnO (AZO), carbon nanotubes (CNT), poly(3,4-ethylenedioxythiophene) (PEDOT), silver (Ag) transparent ink, and copper (Cu) transparent ink.

16. The capacitive touch-screen panel of any one of claim 1claim 2, claim 8 or claim 9, wherein a plurality of first transparent electrode patterns of the first transparent electrode pattern unit are spaced a predetermined distance apart from one another in a widthwise direction and connected to one another in a lengthwise direction such that vertices of a plurality of triangular or rectangular sensing pads are spaced a predetermined distance apart in a lengthwise direction, and a plurality of second transparent electrode patterns of the second transparent electrode pattern unit are spaced a predetermined distance apart from one another in a lengthwise direction at right angles to one another between the respective first transparent electrode patterns and connected to one another in a widthwise direction such that vertices of a plurality of triangular or rectangular sensing pads are spaced a predetermined distance apart from each other so that the first and second transparent electrode pattern units form a right-angled grating shape.

2. A capacitive touch-screen panel comprising:

a first substrate having a screen region and an inactive region;

a first transparent electrode pattern unit disposed in the screen region of a first lateral surface of the first substrate;

a second substrate having a first lateral surface bonded with a second lateral surface of the first substrate, the second substrate having a screen region and an inactive region;

a second transparent electrode pattern unit disposed in the screen region of a second lateral surface of the second substrate;

a first outer electrode interconnection disposed in the inactive region of the second lateral surface of the second substrate and electrically connected to the first transparent electrode pattern unit through at least one via hole; and

a second outer electrode interconnection disposed in the inactive region of the second lateral surface of the second substrate and electrically connected to the second transparent electrode pattern unit,

wherein the capacitive touch-screen panel is configured to sense a touched position with a variation in capacitance due to a contact with the first and second transparent electrode pattern units.

3. The capacitive touch-screen panel of claim 2, wherein an external driver is bonded to the inactive region of the second lateral surface of the second substrate and electrically connected to the first and second outer electrode interconnections.

8. A capacitive touch-screen panel comprising:

a substrate having a screen region and an inactive region;

first and second transparent electrode pattern units respectively disposed in the screen regions of first and second lateral surfaces of the substrate; and

first and second outer electrode interconnections disposed in the inactive regions of the first and second lateral surfaces of the substrate and electrically connected to the first and second transparent electrode pattern units, respectively,

wherein the capacitive touch-screen panel is configured to sense a touched position with a variation in capacitance due to a contact with the first and second transparent electrode pattern units.

11. The capacitive touch-screen panel of any one of claim 8 or claim 9, further comprising:

a transparent substrate having a first lateral surface bonded to the second lateral surface of the substrate by an interlayer adhesive, the transparent substrate having a screen region and an inactive region; and

a shielding electrode pattern configured to remove a noise signal and disposed in the screen region of the lateral surface of the transparent substrate.

12. The capacitive touch-screen panel of claim 11, further comprising an outer shielding electrode interconnection disposed in the inactive region of the second lateral surface of the transparent substrate and electrically connected to the shielding electrode pattern.

13. The capacitive touch-screen panel of any one of claim 8 or claim 9, further comprising:

a transparent substrate having a screen region and an inactive region;

a shielding electrode configured to remove a noise signal and disposed in the screen region of the first lateral surface of the transparent substrate; and

an outer shielding electrode interconnection disposed in the inactive region of the first lateral surface of the transparent substrate and electrically connected to the shielding electrode pattern,

wherein the first lateral surface of the transparent substrate on which the shielding electrode pattern and the outer shielding electrode interconnection are disposed is bonded to a second lateral surface of the substrate by an interlayer adhesive.

14. The capacitive touch-screen panel of any one of claim 8 or claim 9, wherein the substrate is a transparent film formed of at least one selected from the group consisting of glass, PET, PEN, PI, and acryl.

17. The capacitive touch-screen panel of any one of claim 4, claim 6, claim 11 or claim 13, wherein the shielding electrode pattern is formed in a plate or mesh shape.

9. A capacitive touch-screen panel comprising:

a substrate having a screen region and an inactive region;

first and second transparent electrode pattern units respectively disposed in the screen regions of first and second lateral surfaces of the substrate;

a first outer electrode interconnection disposed in the inactive region of the second lateral surface of the substrate and electrically connected to the first transparent electrode pattern unit through at least one via hole; and

a second outer electrode interconnection disposed in the inactive region of the second lateral surface of the substrate and electrically connected to the second transparent electrode pattern unit,

wherein the capacitive touch-screen panel is configured to sense a touched position with a variation in capacitance due to a contact with the first and second transparent electrode pattern units.

10. The capacitive touch-screen panel of claim 9, wherein an external driver is bonded to the inactive region of the second lateral surface of the substrate and electrically connected to the first and second outer electrode interconnections.