TW201937352A - Circuit protection framework of touch display - Google Patents

Abstract

The invention discloses a circuit protection framework of a touch display. The circuit protection framework comprises a substrate, wherein the substrate is provided with at least one conducting network layer; plural peripheral conducting wires independently extend out of two sides of the conducting network layer; in addition, the substrate is provided with at least one ground wire electrically connected to a ground terminal on the outer sides of the conducting network layer and the peripheral conducting wires; and at least one floating wire is arranged on the substrate and is positioned between the plural peripheral conducting wires and the ground wire. Due to the arrangement of the floating wire, a voltage difference between the peripheral conducting wires and the ground wire can be lowered so as to avoid a situation that the floating wire generates migration, short circuit due to the damage of the circuit is avoided, and therefore, the service life of the circuit protection framework of the touch display can be effectively improved.

Description

Circuit protection architecture of touch display

The invention relates to a technology for protecting a touch display circuit, in particular to a circuit protection structure of a touch display which can prevent migration.

The touch screen is a type that can touch the screen according to the contact, such as a finger or a pen tip, so that the haptic feedback system on the screen can drive various connection devices according to a pre-programmed program to replace the mechanical button panel in the past. The touch screen can also display audio and video images on the pressed buttons to create dynamic effects.

Touch screens can be divided into resistive, capacitive, or infrared based on different principles. Resistive touch screens form an electric field between two conductive layers. When the user presses the screen, the upper and lower conductive layers are formed. The contact causes a short circuit and a change in resistance to calculate the position of the user's contact point by measuring the change in voltage.

Capacitive touch screens use the principle of storage of capacitance. Because the human body is charged, when the user touches the screen with his finger, the capacitance of the capacitive touch screen panel can be affected. At this time, the current caused by the four corners can be used Change the difference to estimate the current position of the user's finger.

The infrared touch screen is installed on the two opposite sides of the glass panel of the touch screen. Multiple infrared transmitters and receivers are installed. The transmitter emits infrared rays during operation to form a staggered infrared grid. When the user touches the glass, When the panel is touched, the finger will block the infrared grid, so the position of the user's finger can be known from the blocked position.

However, no matter which type of touch screen is mentioned above, in order to connect the transistors or pixels in the touch screen, the touch screen includes a conductive layer for conducting and conducting. Traditional conductive layers are mostly made of conductive materials such as indium tin oxide (ITO) thin films, but metal meshes have gradually been used to replace them. Because metal meshes are composed of very thin metal wires crossing, and metal meshes The grid impedance is less than 10 ohms, the flexibility is high, the manufacturing cost is lower than that of indium tin oxide, and the transparency is also better than that of indium tin oxide. It is beneficial to apply to large-size panels such as notebook computers and desktop computers, so the metal grid (Metal Mesh) has gradually been used to replace indium tin oxide (ITO) as a conductive layer of touch screens.

However, if the metal grid is in a high temperature and high humidity environment, when the positive and negative electrodes of the metal grid are energized, due to the high humidity and high humidity environment, the positrons of the metal grid will run to the negative electrode due to the law of conservation of charge, so that The conductive wire passing the positive metal grid will take away the metal ions due to the drift of the positron, which will cause the migration state to occur, causing the circuit to short circuit and other conditions, which will relatively reduce the life of the touch screen. .

In view of this, the present invention proposes a circuit protection architecture for a touch display in view of the lack of the conventional technology to effectively overcome these problems.

The main object of the present invention is to provide a circuit protection structure of a touch display, which can reduce the voltage difference between the ground line and the peripheral conductive lines, so as to avoid the migration of the peripheral conductive lines, thereby reducing the peripheral conductive lines Short-circuit or wear-out can effectively increase the life of the touch screen.

Another object of the present invention is to provide a circuit protection structure of a touch display, which has a simple structure, can effectively reduce costs and production time, can relatively increase production efficiency, and contribute to economic benefits.

To achieve the above object, the present invention provides a circuit protection architecture for a touch display, which includes a substrate that can be a transparent substrate, and the substrate is provided with at least one conductive network layer, at least one ground wire, and at least one floating wiring. Among them, the conductive network layer respectively extends a plurality of external conductive wires, and the ground wire is looped around the conductive network layer and the outer peripheral conductive wires, and is electrically connected to a ground terminal, and the floating wiring is located on the plurality of outer conductive wires. And between the ground lines to reduce the voltage difference between the outer conductive lines and the ground lines, and to avoid the migration of the outer conductive lines.

Among them, a plurality of floating wirings are further provided between the plurality of peripheral conductive lines and the ground line, and the plurality of floating wirings are further arranged side by side on the substrate.

The floating wiring is further provided with at least one breakpoint to distinguish the floating wiring into multiple sections.

The distance between the floating wiring and the ground wire is at least 2 microns ( ), The distance between the floating wiring and the outer conductive line is also at least 2 microns ( ).

The floating wiring, the ground wiring, and the peripheral conductive wires may be metal wires, indium tin oxide (ITO) wires, or indium zinc oxide (IZO) wires, respectively. The conductive network layer is a metal mesh.

The sheet resistance of the floating wiring is less than 150 ohms.

Detailed descriptions will be provided below through specific embodiments to make it easier to understand the purpose, technical content, features and effects of the present invention.

The present invention is a circuit protection architecture of a touch display. By changing the structure of the conductive layer of the touch display, the generation of migration can be reduced, thereby improving the service life of the touch display.

Please refer to the first and second figures to describe in detail how the circuit protection architecture 1 of the control display of the present invention achieves the above-mentioned effects. As shown in the figure, the circuit protection architecture 1 includes a substrate 10, and the substrate 10 can be a transparent substrate. The arrangement of the transparent substrate can improve the light transmittance and facilitate the 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 grid. The metal grid is formed by interlacing metal wires such as ultra-fine gold wires, silver wires, or copper wires. Furthermore, the two sides of the conductive network layer 20 further extend outwardly with a plurality of peripheral conductive wires 22, wherein the plurality of peripheral wires 22 are arranged side by side along the two sides of the conductive network layer 20. The at least one ground line 30 may be a metal line, an indium tin oxide (TO) line, or an indium zinc oxide (IZO) line. The ground line 30 is located on the substrate 10 and is looped around the conductive network The circuit layer 20 and the plurality of peripheral conductive lines 22 are externally connected to a ground terminal 32 electrically. The floating line 40 can be a metal line, an indium tin oxide (ITO) line or an indium zinc oxide (IZO) line, and the sheet resistance of the floating line 40 (sheet) resistance) is less than 150 ohms (Ω); two floating wirings 40 are located on the substrate 10 and are located between a plurality of peripheral conductive wires 22 and a grounding wire 30 on both sides of the conductive network layer 20, wherein the floating wirings 40 and ground The distance a of the wire 30 and the distance b of the floating wiring 40 and the peripheral conductive wire 22 are at least 2 microns ( ), And the floating wiring 40 is further arranged along the routing position of the ground line 32 to effectively reduce the voltage difference between the outer conductive line 22 and the ground line 30 and reduce positive ions of the outer conductive line 22 due to the law of conservation of charge Running toward the negative electrode causes migration and the like to occur in the peripheral conductive line 22.

Next, please refer to the third figure to explain the second embodiment of the present invention. As shown in the figure, among the substrate 10, the conductive network layer 20, the plurality of peripheral conductive wires 22, the ground wire 30, and the ground terminal 32 in this embodiment The structure and the installation position are the same as those in the first embodiment, so the description will not be repeated. This embodiment is different from the first embodiment in the structure of the floating wiring 40. The floating wiring 40 of this embodiment is the same as the first embodiment, and is provided on both sides of the conductive network layer 20 and is located on the outer conductive line. 22 and the ground line 30, but in this example, there are a plurality of floating wirings 40 on both sides of the conductive network layer 20, and the plurality of floating wirings 40 on both sides of the conductive network layer 20 are arranged side by side with each other. The distance a of the floating wiring 40 closest to the ground line 30 on the substrate 10 is at least 2 microns ( ), The distance b from the floating wiring 40 closest to the peripheral conductive line 22 is also at least 2 microns ( ). The arrangement of the floating wiring 40 can reduce the voltage difference between the peripheral conductive line 22 and the ground line 30, and can reduce the situation that the positive ions of the peripheral conductive line 22 run toward the negative electrode, which causes the peripheral conductive line 22 to migrate ( migration).

Next, please refer to the fourth figure to explain the third embodiment of the present invention. As shown in the figure, among the substrate 10, the conductive network layer 20, the plurality of peripheral conductive wires 22, the ground wire 30, and the ground terminal 32 in this embodiment, The structure and the installation position are the same as those in the first embodiment, so the description will not be repeated. This embodiment is different from the first embodiment in the structure of the floating wiring 42. In the second embodiment, the floating wiring 42 is also disposed on both sides of the conductive network layer 20, and is located between the peripheral conductive line 22 and the ground line 30. However, in this embodiment, each floating wiring 42 is provided with at least one breakpoint 420 to distinguish the floating wiring 42 into multiple sections. The distance a between the ground line 30 and the floating wiring 42 is at least 2 microns ( ), The distance b between the outer conductive line 22 and the floating wiring 42 is also at least 2 microns ( ). The arrangement of the floating wiring 42 in the third embodiment can also effectively reduce the voltage difference between the outer conductive wire 22 and the ground wire 30, and can reduce the positive conductive ions of the outer conductive wire 22 from running toward the negative electrode, resulting in the outer conductive wire 22 A migration situation occurs.

Next, please refer to the fifth figure to explain the fourth embodiment of the present invention. As shown in the figure, among the substrate 10, the conductive network layer 20, the plurality of peripheral conductive wires 22, the ground wire 30, and the ground terminal 32 in this embodiment The structure and the installation position are the same as those in the first embodiment, so the description will not be repeated. This embodiment is different from the first embodiment in the structure of the floating wiring 42. The floating wiring 42 of this embodiment is provided with at least one breakpoint 420 to distinguish the floating wiring 42 into multiple segments. The floating wiring 42 is provided with a plurality of floating wirings 42 having a breakpoint 420 on both sides of the conductive network layer 20, and the plurality of floating wirings 42 on both sides of the conductive network layer 20 are arranged side by side with each other. The distance a of the floating wiring 42 closest to the ground line 30 on the substrate 10 is at least 2 microns ( ), The distance b from the floating wiring 42 closest to the peripheral conductive line 22 is also at least 2 microns ( ). The arrangement of the floating wiring 42 in the fourth embodiment can also effectively reduce the voltage difference between the peripheral conductive line 22 and the ground line 30, and can reduce the positive ions of the peripheral conductive line 22 to run toward the negative electrode, resulting in the generation of the peripheral conductive line 22. Migration status.

Next, please refer to the sixth figure to explain the fifth embodiment of the present invention. As shown in the figure, among the substrate 10, the conductive network layer 20, the plurality of peripheral conductive wires 22, the ground wire 30, and the ground terminal 32 in this embodiment The structure and the installation position are the same as those in the first embodiment, so the description will not be repeated. The structure of this embodiment is different from that of the first embodiment in the structure of the floating wirings 40 and 42. The present embodiment has a plurality of floating wirings 40 and 42 as examples, and the peripheral conductive wires 22 are disposed on both sides of the conductive network layer 20, respectively. And the ground line 30, and the plurality of floating wirings 40, 42 are arranged side by side on the substrate 10, wherein the plurality of floating wirings 40, 42 may be floating wirings 40 without breakpoints, or floating with breakpoints The wiring 42, wherein the distance a of the floating wiring 42 closest to the ground wire 30 is at least 2 micrometers ( ), The distance b from the floating wiring 40 closest to the peripheral conductive line 22 is also at least 2 microns ( ). Whether it is a floating connection 42 with a breakpoint or a floating connection 40 without a breakpoint, it can effectively reduce the voltage difference between the outer conductive line 22 and the ground line 30, and can reduce the outer conductive line 22 due to the law of conservation of charge. The positive ions run towards the negative electrode, which causes a migration condition of the peripheral conductive wire 22.

To sum up, the present invention can reduce the voltage difference between the ground line and the peripheral conductive line by floating the wiring between the ground line and the peripheral conductive line, and avoid the migration of the peripheral conductive line. This reduces the occurrence of short circuits or wear of the peripheral conductive wires, which can effectively improve the service life of the touch screen, and the invention has a simple structure, can reduce costs and production time, can relatively increase production efficiency, and help improve economic benefits.

The foregoing are merely preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. Therefore, all equal changes or modifications made according to the features and spirit described in the scope of the application of the present invention shall be included in the scope of patent application of the present invention.

1‧‧‧Circuit protection architecture

10‧‧‧ substrate

20‧‧‧ conductive network layer

22‧‧‧ Peripheral conductive wire

30‧‧‧ ground wire

32‧‧‧ Ground

40‧‧‧floating wiring

42‧‧‧Floating wiring

420‧‧‧ breakpoint

a‧‧‧distance

b‧‧‧distance

The first figure is a perspective view of a first embodiment of the present invention. The second figure is a top view of the first embodiment of the present invention. The third figure is a top view of the second embodiment of the present invention. The fourth figure is a top view of the third embodiment of the present invention. The fifth figure is a top view of the fourth embodiment of the present invention. The sixth figure is a top view of the fifth embodiment of the present invention.

Claims (10)

A circuit protection architecture for a touch display includes: a substrate; at least one conductive network layer located on the substrate, and the conductive network layer extending outwardly from a plurality of external conductive lines; at least one ground line on the substrate And is looped out of the conductive network layer and the peripheral conductive lines, and is electrically connected to a ground terminal; and at least one floating wiring is located on the substrate and is located on the peripheral conductive lines and the ground line. between. The circuit protection structure of the touch display according to claim 1, wherein a plurality of the floating wirings are further provided between the peripheral conductive lines and the ground line, and the floating wirings are further arranged side by side on the substrate. The circuit protection structure of the touch display according to claim 1, wherein the floating wiring is further provided with at least one breakpoint to distinguish the floating wiring into multiple segments. The circuit protection structure of the touch display according to claim 1, wherein the distance between the floating wiring and the ground wire is at least 2 microns ( ). The circuit protection structure of the touch display according to claim 1, wherein the distance between the floating wiring and the peripheral conductive line is at least 2 microns ( ). The circuit protection architecture of a touch display according to claim 1, wherein the floating wiring is a metal wire, an indium tin oxide (ITO) wire, or an indium zinc oxide (IZO) wire . The circuit protection structure of the touch display according to claim 1, wherein the ground line is a metal line, an indium tin oxide (TO) line, or an indium zinc oxide (IZO) line. The circuit protection architecture of a touch display according to claim 1, wherein the peripheral conductive line is a metal line, an indium tin oxide (ITO) line, or an indium zinc oxide (IZO) line . The circuit protection architecture of the touch display according to claim 1, wherein the conductive network layer is a metal mesh. The circuit protection structure of the touch display according to claim 1, wherein the sheet resistance of the floating wiring is less than 150 ohms (Ω).