CN108459765B

CN108459765B - Circuit protection device of touch display

Info

Publication number: CN108459765B
Application number: CN201810171195.4A
Authority: CN
Inventors: 杨岳峰; 陈柏林; 黄彦衡; 刘菊香
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2018-03-01
Filing date: 2018-03-01
Publication date: 2021-06-01
Anticipated expiration: 2038-03-01
Also published as: CN108459765A; TWI656465B; TW201937352A

Abstract

The invention relates to a circuit protection device of a touch display, which comprises a substrate, wherein the substrate is provided with at least one conductive network layer, two sides of the conductive network layer respectively extend outwards to form a plurality of peripheral conductive wires, the substrate is positioned outside the conductive network layer and the peripheral conductive wires, at least one grounding wire electrically connected with a grounding end is further arranged on the substrate, and at least one floating wiring is arranged on the substrate and positioned between the plurality of peripheral conductive wires and the grounding wire. The arrangement of the floating connection wire can reduce the voltage difference between the peripheral conducting wire and the grounding wire so as to avoid the condition that the floating connection wire generates migration (migration) to cause the circuit to be damaged to generate short circuit, thereby effectively prolonging the service life of the circuit protection device of the touch display by the arrangement of the floating connection wire.

Description

Circuit protection device of touch display

Technical Field

The present invention relates to a technique for protecting a circuit of a touch display, and more particularly, to a circuit protection device of a touch display capable of preventing migration (mistgration).

Background

The touch screen can contact the screen according to the contact, such as finger or glue pen head, so that the touch feedback system on the screen can drive various link devices according to the pre-programmed program to replace the mechanical button panel in the past, and the touch screen can display the video/audio picture on the pressed button to produce vivid effect.

The touch screen can be classified into resistive, capacitive or infrared type, wherein the resistive touch screen forms an electric field between two conductive layers, when a user presses the screen, the upper and lower conductive layers will contact each other to cause short circuit and resistance change, so as to calculate the position of the user's contact point by the variation of the measured voltage.

The capacitive touch screen utilizes the principle of capacitance to store charge, and since the human body is charged, when the user's finger touches the screen, the capacitance of the capacitive touch screen panel can be affected, and the current position of the user's finger can be calculated according to the current variation difference caused by four corners.

The infrared touch screen is installed with a plurality of infrared emitters and receivers on two opposite sides of the glass panel on the surface layer of the touch screen, during operation, the emitters emit infrared rays to form a staggered infrared grid, when a user touches the glass panel, the infrared grid is blocked by a finger, so that the touch point of the finger of the user can be known by the blocked position.

However, in any of the above-mentioned types of touch screens, a conductive layer is provided to conduct electricity for connecting each transistor or pixel in the touch screen. Most of the conventional conductive layers are made of conductive materials such as Indium Tin Oxide (ITO) films, but Metal Mesh (Metal Mesh) is gradually used to replace the conventional conductive layers, because the Metal Mesh is composed of very fine Metal wires crossed, the Metal Mesh has a resistance less than 10 ohms, high flexibility, lower manufacturing cost than indium tin oxide, better transparency than indium tin oxide, and is beneficial to large-sized panels such as notebook computers and desktop computers, the Metal Mesh (Metal Mesh) is gradually used to replace Indium Tin Oxide (ITO) as the conductive layer of touch screens.

However, if the metal mesh is in a high-temperature and high-humidity environment, when the positive electrode and the negative electrode of the metal mesh are energized, the positive electrons of the metal mesh will run toward the negative electrode due to the law of charge conservation, so that the conductive wires passing through the positive metal mesh will take away the metal ions due to the drift of the positive electrons, thereby causing the occurrence of migration (migration) state, causing short circuit of the lines, and the like, and relatively reducing the service life of the touch screen.

In view of the above, the present invention provides a circuit protection device for a touch display to overcome the above problems.

Disclosure of Invention

The present invention provides a circuit protection device for a touch display, which can reduce the voltage difference between a ground line and a peripheral conductive line to prevent the peripheral conductive line from generating migration (mistraving), thereby reducing the occurrence of short circuit or wear of the peripheral conductive line and effectively prolonging the service life of the touch screen.

Another objective of the present invention is to provide a circuit protection device for a touch display, which has a simple structure, can effectively reduce the cost and the production time, relatively improve the production efficiency, and is helpful to improve the economic benefits.

The present invention provides a circuit protection device for a touch display, which includes a substrate, which can be a transparent substrate, and at least one conductive network layer, at least one ground line, and at least one floating connection line are disposed on the substrate, wherein the conductive network layer extends out of a plurality of peripheral conductive wires, the ground line is disposed around the conductive network layer and the outer sides of the peripheral conductive wires and is electrically connected to a ground terminal, and the floating connection line is disposed between the peripheral conductive wires and the ground line to reduce the voltage difference between the peripheral conductive wires and the ground line, thereby preventing the peripheral conductive wires from generating migration (migration).

Wherein a plurality of floating wirings are further disposed between the plurality of peripheral conductive wires and the ground line, and the plurality of floating wirings are further disposed side by side on the substrate.

The floating connection is further provided with at least one breakpoint to divide the floating connection into a plurality of sections.

Wherein the distance between the floating wiring and the ground line is at least 2 micrometers (μm), and the distance between the floating wiring and the peripheral conductive line is also at least 2 micrometers (μm).

The floating connection line, the grounding line and the peripheral conductive line can be a metal line, an Indium Tin Oxide (ITO) line or an Indium Zinc Oxide (IZO) line, respectively. The conductive network layer is a metal mesh.

Wherein the sheet resistance (sheet resistance) of the floating wiring is further less than 150 ohm (omega).

The purpose, technical content, features and effects of the present invention will be more readily understood through the detailed description of the embodiments below.

Drawings

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a top view of the first embodiment of the present invention.

FIG. 3 is a top view of a second embodiment of the present invention.

FIG. 4 is a top view of a third embodiment of the present invention.

FIG. 5 is a top view of a fourth embodiment of the present invention.

FIG. 6 is a top view of a fifth embodiment of the present invention.

Reference numerals:

1 Circuit protection device

10 base plate

20 conductive network layer

22 peripheral conductive line

30 ground wire

32 ground terminal

40 floating connection

42 floating connection

420 breakpoint

a distance

Distance b

Detailed Description

The present invention relates to a circuit protection device for a touch display, which can reduce the occurrence of migration (migration) by changing the structure of the conductive layer of the touch display, so as to prolong the service life of the touch display.

Referring to fig. 1 and fig. 2, how the circuit protection device 1 of the monitor control device according to the present invention achieves the above-mentioned effects will be described in detail. As shown in the figure, the circuit protection device 1 includes a substrate 10, the substrate 10 can be a transparent substrate, and the transparent substrate can enhance the light transmittance and is beneficial to the light sensitivity of the touch screen. The substrate 10 is provided with at least one conductive network layer 20, in this embodiment, the conductive network layer 20 is a metal mesh, the metal mesh is formed by interlacing metal wires such as ultra-fine gold wires, silver wires or copper wires, and two sides of the conductive network layer 20 extend outward to form a plurality of peripheral conductive wires 22, wherein the plurality of peripheral conductive wires 22 are arranged side by side along two sides of the conductive network layer 20. At least one grounding line 30 can be a metal line, an Indium Tin Oxide (TO) line or an Indium Zinc Oxide (IZO) line, the grounding line 30 is located on the substrate 10, and is disposed around the conductive network layer 20 and the plurality of peripheral conductive lines 22, and is electrically connected TO a grounding terminal 32. The two floating lines 40 may be metal lines, Indium Tin Oxide (ITO) lines, or Indium Zinc Oxide (IZO) lines, and the sheet resistance (ohm resistance) of the floating lines 40 is less than 150 ohm (Ω); the two floating wires 40 are located on the substrate 10 and respectively located between the plurality of peripheral conductive lines 22 and the ground line 30 on both sides of the conductive network layer 20, wherein a distance a between the floating wire 40 and the ground line 30 and a distance b between the floating wire 40 and the peripheral conductive line 22 are both at least 2 micrometers (μm), and the floating wire 40 is further disposed along the routing position of the ground line 32 to effectively reduce the voltage difference between the peripheral conductive line 22 and the ground line 30, so as to reduce the situations of migration (migration) of the peripheral conductive line 22 caused by the positive ions of the peripheral conductive line 22 running toward the negative electrode due to the law of charge conservation.

Referring to fig. 3, a second embodiment of the present invention is described, and as shown in the figure, the substrate 10, the conductive network layer 20, the plurality of peripheral conductive lines 22, the ground line 30 and the ground terminal 32 of the present embodiment have the same structure and arrangement positions as those of the first embodiment, and thus, the description thereof will not be repeated. The structure of the floating wire 40 of this embodiment is different from that of the first embodiment, and the floating wire 40 of this embodiment is the same as that of the first embodiment, and is disposed on both sides of the conductive mesh layer 20 and located between the peripheral conductive line 22 and the ground line 30, but this embodiment exemplifies that there are a plurality of floating wires 40 on both sides of the conductive mesh layer 20, and the plurality of floating wires 40 on both sides of the conductive mesh layer 20 are disposed side by side on the substrate 10, wherein the distance a between the floating wire 40 closest to the ground line 30 is at least 2 micrometers (μm), and the distance b between the floating wire 40 closest to the peripheral conductive line 22 is also at least 2 micrometers (μm). The floating connection line 40 can reduce the voltage difference between the peripheral conductive line 22 and the ground line 30, and reduce the migration (migration) of the peripheral conductive line 22 caused by the positive ions of the peripheral conductive line 22 going to the negative electrode.

Referring to fig. 4, a third embodiment of the present invention is described, and as shown in the drawings, the substrate 10, the conductive network layer 20, the plurality of peripheral conductive lines 22, the ground line 30 and the ground terminal 32 of the present embodiment have the same structure and arrangement positions as those of the first embodiment, and thus, the description thereof will not be repeated. The structure of the floating connection line 42 of the present embodiment is different from that of the first embodiment in that the two floating connection lines 42 of the present embodiment are also respectively disposed on two sides of the conductive network layer 20 and located between the peripheral conductive line 22 and the ground line 30, but each floating connection line 42 of the present embodiment is provided with at least one break point 420 to divide the floating connection line 42 into a plurality of segments, wherein the distance a between the ground line 30 and the floating connection line 42 is at least 2 micrometers (μm), and the distance b between the peripheral conductive line 22 and the floating connection line 42 is also at least 2 micrometers (μm). The floating connection line 42 of the third embodiment can also effectively reduce the voltage difference between the peripheral conductive line 22 and the ground line 30, and can reduce the migration (migration) of the positively charged positive ions of the peripheral conductive line 22 toward the negative electrode, which results in the peripheral conductive line 22.

Referring to fig. 5, a fourth embodiment of the present invention is described, and as shown in the drawings, the substrate 10, the conductive network layer 20, the plurality of peripheral conductive lines 22, the ground line 30 and the ground terminal 32 of the present embodiment have the same structure and arrangement positions as those of the first embodiment, and thus, the description thereof will not be repeated. The structure of the present embodiment is different from the structure of the first embodiment in the structure of the floating wire 42, the floating wire 42 of the present embodiment is provided with at least one break point 420 to divide the floating wire 42 into a plurality of sections, and the floating wires 42 of the present embodiment are provided with a plurality of break points 420 to be respectively provided on both sides of the conductive mesh layer 20, and the plurality of floating wires 42 on both sides of the conductive mesh layer 20 are further provided side by side on the substrate 10, wherein the distance a between the floating wire 42 closest to the ground line 30 is at least 2 micrometers (μm), and the distance b between the floating wire 42 closest to the peripheral conductive line 22 is also at least 2 micrometers (μm). By the floating connection line 42 of the fourth embodiment, the voltage difference between the peripheral conductive line 22 and the ground line 30 can be effectively reduced, and the migration (migration) of the peripheral conductive line 22 caused by the positive ions of the peripheral conductive line 22 going to the negative electrode can be reduced.

Referring to fig. 6, a fifth embodiment of the present invention is described, and as shown in the figure, the substrate 10, the conductive network layer 20, the plurality of peripheral conductive lines 22, the ground line 30 and the ground terminal 32 of the present embodiment have the same structure and arrangement positions as those of the first embodiment, and thus the description thereof will not be repeated. The structure of the

floating connection lines

40, 42 of the present embodiment is different from that of the first embodiment, and the present embodiment has a plurality of

floating connection lines

40, 42 respectively disposed between the peripheral conductive line 22 and the ground line 30 on both sides of the conductive network layer 20, and the plurality of

floating connection lines

40, 42 are disposed side by side on the substrate 10, wherein the plurality of

floating connection lines

40, 42 can be the floating connection line 40 without a break point, or the floating connection line 42 with a break point, wherein the distance a between the floating connection line 42 closest to the ground line 30 is at least 2 micrometers (μm), and the distance b between the floating connection line 40 closest to the peripheral conductive line 22 is also at least 2 micrometers (μm). The floating connection 42 with a breakpoint or the floating connection 40 without a breakpoint can effectively reduce the voltage difference between the peripheral conductive line 22 and the ground line 30, and can reduce the migration (migration) of the peripheral conductive line 22 caused by the positive ions of the peripheral conductive line 22 going to the negative pole due to the law of charge conservation.

In summary, the floating connection line is disposed between the ground line and the peripheral conductive line, so that the voltage difference between the ground line and the peripheral conductive line can be reduced, and the migration (migration) of the peripheral conductive line can be avoided, thereby reducing the short circuit or loss of the peripheral conductive line, and effectively prolonging the service life of the touch screen.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, all the equivalent changes or modifications according to the features and the spirit described in the scope of the application of the present invention should be included in the scope of the application of the present invention.

Claims

1. A circuit protection device of a touch display is characterized by comprising:

a substrate;

at least one conductive network layer on the substrate, wherein the conductive network layer extends a plurality of peripheral conductive wires;

at least one grounding wire, which is positioned on the substrate, is arranged outside the conductive network layer and the plurality of peripheral conductive wires in a surrounding way, and is electrically connected with a grounding terminal; and

at least one floating connection wire which is a long strip-shaped floating connection wire and is positioned on the substrate and between the plurality of peripheral conducting wires and the grounding wire, wherein the floating connection wire is arranged along the grounding wire, the distance between the floating connection wire and the grounding wire is at least 2 micrometers, and the distance between the floating connection wire and the plurality of peripheral conducting wires is at least 2 micrometers.

2. The circuit protection device of claim 1, wherein a plurality of floating wires are further disposed between the plurality of peripheral conductive wires and the ground line, and the plurality of floating wires are further disposed side by side on the substrate.

3. The circuit protection device of claim 1, wherein the floating wire further has at least one break point to divide the floating wire into a plurality of segments.

4. The circuit protection device of claim 1, wherein the floating wires are metal wires, indium tin oxide wires, or indium zinc oxide wires.

5. The circuit protection device of claim 1, wherein the ground line is a metal line, an indium tin oxide line, or an indium zinc oxide line.

6. The circuit protection device of claim 1, wherein the plurality of peripheral conductive lines are metal lines, indium tin oxide lines, or indium zinc oxide lines.

7. The circuit protection device of claim 1, wherein the conductive mesh layer is a metal mesh.

8. The circuit protection device of claim 1, wherein the floating connection has a sheet resistance of less than 150 ohms.