TOUCH SCREEN HAVING MESH PATTERNED ELECTRODES

• US 20140118635A1
• Filed: 04/11/2013
• Published: 05/01/2014
• Est. Priority Date: 06/11/2012
• Status: Abandoned Application

• Current Assignee: Heui Bong Yang
• Original Assignee: Heui Bong Yang
• Inventors: Yang, Heui Bong
• Application Number:
  US13/995,547
• Publication Number:
  US 20140118635A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G06F 1/1692 the I/O peripheral being a secondary touch screen used as control interface, e.g. virtual buttons or sliders
• 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 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• 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

Abstract

A touch screen having mesh patterned electrodes in accordance with an embodiment of the present invention includes: a plurality of first electrode lines formed with metal lines in a diagonal direction on one surface of a transparent layer; and a plurality of second electrode lines formed with metal lines on the same surface as the plurality of first electrode lines and intersecting with the first electrode lines—wherein any one electrode line of the first electrode lines and the second electrode lines forms a severed area where the plurality of first electrode lines intersect with the plurality of second electrode lines in such a way that the first electrode lines are electrically severed from the second electrode lines, and wherein the other electrode line of the first electrode lines and the second electrode lines passes through the severed area, and a step is formed at a position facing the severed area; and a connection pattern electrically connecting the electrode lines severed by the severed area.

Claims

1. A touch screen having mesh patterned electrodes, the touch screen comprising a first electrode and a second electrode, intersecting with each other on an insulating transparent layer,

wherein the first electrode and the second electrode are an alloy of at least one selected from the group consisting of gold, silver, platinum, copper, nickel and chrome.

2. The touch screen of claim 1, wherein the insulating transparent layer is one selected from the group consisting of glass and PET, transparent film, transparent acryl and transparent plastic.

3. A touch screen having mesh patterned electrodes, the touch screen comprising:

a plurality of first electrode lines formed with metal lines in a diagonal direction on one surface of a transparent layer; and

a plurality of second electrode lines formed with metal lines on the same surface as the plurality of first electrode lines and intersecting with the first electrode lines, wherein any one electrode line of the first electrode lines and the second electrode lines forms a severed area where the plurality of first electrode lines intersect with the plurality of second electrode lines in such a way that the first electrode lines are electrically severed from the second electrode lines, and wherein the other electrode line of the first electrode lines and the second electrode lines passes through the severed area, and a step is formed at a position facing the severed area; and

a connection pattern electrically connecting the electrode lines severed by the severed area.

4. The touch screen of claim 3, further comprising an insulation layer insulating the connection pattern from the electrode line passing through the severed area.

5. The touch screen of claim 3, further comprising a plurality of sub-electrode lines formed inside an area demarcated by the plurality of first electrode lines and second electrode lines and connected to any one electrode line of the first electrode lines and the second electrode lines, the sub-electrode lines having a structure of a lattice.

6. The touch screen of claim 3, wherein a plurality of sub-electrode lines demarcated by the plurality of first electrode lines and second electrode lines and formed inside areas longitudinally facing each other are connected with the first electrode lines and severed from the second electrode lines, and

wherein a plurality of sub-electrode lines demarcated by the plurality of first electrode lines and second electrode lines and formed inside areas latitudinally facing each other are connected with the second electrode lines and severed from the first electrode lines.

7. The touch screen of claim 3, wherein a virtual axis drawn longitudinally from points where the plurality of first electrode lines and second electrode lines intersect with one another is tilted by a predetermined angle from a line forming a right angle from an upper-side line of the touch screen.

8. The touch screen of claim 7, wherein the predetermined angle is within a range of 20 degrees to the left or right.

9. The touch screen of claim 5, wherein a length of the connection pattern electrically connecting the severed electrode lines is within a range that is greater than twice and smaller than four times of a width of the lattice of the sub-electrode lines.

10. The touch screen of claim 6 wherein a thickness of the sub-electrode lines is 0.05-10 um, and a width of the sub-electrode lines is 0.5-10 um.

11. The touch screen of claim 10, wherein the sub-electrode lines are repeatedly formed at an interval of 100-2000 um to form a lattice structure.

12. The touch screen of claim 4, wherein the insulation layer has a thickness of 0.5-2 um and a width of 1-100 um.

13. The touch screen of claim 4, wherein the insulation layer is one of an insulation pattern that is flatly coated in a lengthwise direction of an electrode line passing in between the severed area, an insulation pattern that is coated in the shape of a circle or an ellipse, and an insulation pattern that is coated in the shape of an arch, of which a center portion is lifted.

14. The touch screen of claim 4, wherein the insulation layer is a non-conductive film layer or a clear insulation coating arranged in between the connection pattern electrically connecting the severed electrode lines and the transparent layer in which the plurality of first and second electrode lines are formed, and

wherein the connection pattern and the severed electrode lines are electrically connected through a via hole formed in the non-conductive film layer or the clear insulation coating.