CN103019451A - An OGS touch panel - Google Patents

Abstract

The invention provides an OGS touch panel, which comprises: a liquid crystal module; a touch sensing element disposed on a first insulating layer; a plurality of metal wires arranged on a second insulating layer, wherein the metal wires are electrically connected with the touch sensing element; a glass substrate disposed above the second insulating layer; and the conductive pattern is positioned outside the range of the liquid crystal module, and the OGS touch panel carries out electrostatic protection by virtue of the conductive pattern. By adopting the invention, the metal routing is coated by the conductive pattern such as the whole area or the reticular structure, so that the circuit, the touch sensing element or other electronic devices can be effectively prevented from being damaged by static electricity on the premise of not increasing the cost or the production process, and the whole static protection capability of the touch panel is improved.

Description

An OGS touch panel

technical field

The invention relates to a touch panel, in particular to an OGS (One Glass Solution, monolithic glass) touch panel.

Background technique

In recent years, touch technology has been widely used in various multimedia electronic products, especially portable mobile electronic products, such as mobile phones, e-books, and tablet computers. Using touch technology as an input means can effectively replace the existing keyboard or mouse input methods. In addition to convenience, and because of the intuitiveness of operation, touch input technology has become a very popular human-computer interaction interface and multimedia interaction method.

Generally speaking, during the manufacturing process of the touch panel, a guard ring is often formed on the peripheral area of the touch panel, and the guard ring is arranged outside the signal connection lines. For example, the guard ring usually adopts a wide ground metal line, and the guard ring can effectively reduce the phenomenon that the noise signal of the external environment affects the internal electronic signal of the touch panel. In addition, the touch panel is also equipped with electrostatic protection components to effectively reduce the phenomenon of electrostatic discharge in the touch panel.

For the ESD protection of the OGS touch panel, a solution in the prior art is to use a wider grounding line to surround a signal connection line, and the signal connection line is electrically connected to the touch sensing element However, this solution has poor electrostatic protection capability, especially when the signal connection lines are located outside the range of the liquid crystal module. Another solution is to cover the signal connection lines with insulating or low-conductivity materials, such as insulating covering agent, insulating tape, ink, and the like. Although the electrostatic protection ability of this structure is slightly better, it will increase the cost and production process.

In view of this, how to design a touch panel that can quickly release the static electricity in the panel without increasing the production cost and process, and prevent the touch sensing elements, signal connection lines or other electronic devices from being damaged by static electricity is an important issue. It is a problem to be solved urgently by relevant technicians in the industry.

Contents of the invention

Aiming at the above defects in the static protection design of the OGS touch panel in the prior art, the present invention provides a novel OGS touch panel.

According to one aspect of the present invention, an OGS touch panel is provided, including:

a liquid crystal module;

A touch sensing element is disposed on a first insulating layer, and the first insulating layer is located above the liquid crystal module;

A plurality of metal wires are arranged on a second insulating layer, and the second insulating layer is located above the first insulating layer, wherein the plurality of metal wires are electrically connected to the touch sensing element;

a glass substrate disposed above the second insulating layer; and

A conductive pattern is located outside the range of the liquid crystal module and is arranged on the first insulating layer, and the OGS touch panel is protected against static electricity by the conductive pattern.

Preferably, the conductive pattern is an entire area to surround the plurality of metal traces.

Preferably, the conductive pattern is a mesh structure to surround the plurality of metal traces.

Preferably, the conductive pattern is a mesh structure and partially overlaps the plurality of metal wires, so as to protect the metal wires outside the range of the liquid crystal module from static electricity.

Preferably, the conductive pattern is electrically connected to a ground pin of a flexible circuit board.

Preferably, the potential of the conductive pattern is floating.

Preferably, the conductive pattern is made of indium tin oxide.

Preferably, the OGS touch panel further includes an adhesive layer for bonding the liquid crystal module and the first insulating layer.

According to another aspect of the present invention, an OGS touch panel is provided, including:

a liquid crystal module;

A touch sensing element is disposed on a first insulating layer, and the first insulating layer is located above the liquid crystal module;

A plurality of metal wires are arranged on a second insulating layer, and the second insulating layer is located above the first insulating layer, wherein the plurality of metal wires are electrically connected to the touch sensing element;

a glass substrate disposed above the second insulating layer; and

A conductive pattern covers a shorting bar of the OGS touch panel for array testing, and the conductive pattern is electrically grounded so that the OGS touch panel realizes electrostatic protection.

Preferably, the conductive pattern is made of indium tin oxide.

Using the OGS touch panel of the present invention, a conductive pattern is set outside the range of the liquid crystal module, and the metal wiring is covered by the conductive pattern such as a whole area or a mesh structure, so that there is no need to increase the cost or production process. Under this condition, it can effectively prevent the circuit, touch sensing element or other electronic devices from being damaged by static electricity, and improve the overall electrostatic protection capability of the touch panel. In addition, in the OGS touch panel of the present invention, the conductive pattern can only cover the shorting bar used for array testing, and the static electricity inside the touch panel can be released through the conductive pattern through the static conduction path provided by the shorting bar. land.

Description of drawings

Readers will have a clearer understanding of various aspects of the present invention after reading the detailed description of the present invention with reference to the accompanying drawings. in,

Fig. 1(a) shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to an embodiment of the present invention;

Figure 1(b) shows an alternative embodiment of the OGS touch panel of Figure 1(a);

Fig. 2(a) shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to another embodiment of the present invention;

Fig. 2(b) shows another view of the OGS touch panel of Fig. 2(a);

Fig. 3(a) shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to another embodiment of the present invention;

Figure 3(b) shows an alternative embodiment of the OGS touch panel in Figure 3(a); and

FIG. 4 shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to yet another embodiment of the present invention.

Detailed ways

In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

As mentioned above, the traditional OGS (One Glass Solution, monolithic glass) touch panel uses a wide grounding line to surround the signal connection line connected to the touch sensing element, so as to protect the signal connection line from static electricity. However, this solution has poor electrostatic protection capability, especially when part of the signal connection line is outside the liquid crystal module, the grounding line cannot provide electrostatic protection for this part of the line. In addition, although insulating or low-conductivity materials can be used to cover the signal connection lines, it will increase the cost and production process.

In order to effectively solve the above problems in the prior art, the present invention provides a novel OGS touch panel architecture. FIG. 1( a ) shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to an embodiment of the present invention.

1(a), the OGS touch panel of the present invention includes a liquid crystal module (LCM, Liquid Crystal Model) 100, a touch sensing element 104, a plurality of metal traces 108, a glass substrate (cover glass) 110 and a conductive pattern 112.

Specifically, the touch sensing element 104 is disposed on a first insulating layer 102 , and the first insulating layer 102 is located above the liquid crystal module 100 . A plurality of metal traces 108 are disposed on a second insulating layer 106 , and the second insulating layer 106 is located above the first insulating layer 102 . The metal traces 108 are electrically connected to the touch sensing element 104 . In addition, in order to cover the metal wires 108 , a shielding layer may be disposed under the glass substrate 110 , and the metal wires 108 are hidden by the shielding layer. For example, the layout area of the shielding layer may be slightly larger than the wiring area of the metal wiring 108 .

The glass substrate 110 is disposed above the second insulating layer 106 . When the glass substrate 110 is pressed, the actual pressed position is detected by the touch sensing element 104 on the first insulating layer 102 , and then a control command corresponding to the pressed position is executed or a corresponding graphical interface is displayed. It should be noted that the OGS touch panel of the present invention further includes a conductive pattern 112 , which is an entire area, as shown in FIG. 1( a ). Preferably, the conductive pattern 112 is made of indium tin oxide (ITO). Moreover, the conductive pattern 112 is located outside the range of the liquid crystal module 100 and is disposed on the first insulating layer 102 . For example, the conductive pattern 112 is formed while the touch sensing element 104 is formed.

In this way, using the OGS touch panel of the present invention, the conductive pattern 112 can effectively prevent the metal wiring 108, the touch sensing element 104 or other electronic devices from being subjected to static electricity without increasing the cost or production process. damage, which improves the overall electrostatic protection capability of the OGS touch panel.

In a specific embodiment, the OGS touch panel further includes an adhesive layer 114 . The adhesive layer 114 is located between the first insulating layer 102 and the liquid crystal module 100 for bonding the liquid crystal module 100 and the first insulating layer 102 .

Fig. 1(b) shows an alternative embodiment of the OGS touch panel of Fig. 1(a). Referring to FIG. 1( a ) and FIG. 1( b ), the difference of this alternative embodiment is that the conductive pattern 112 is a mesh structure. It is easy to know that the conductive pattern of the mesh structure can also protect the metal wiring 108 , the touch sensing element 104 or other electronic devices from electrostatic discharge.

FIG. 2( a ) shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to another embodiment of the present invention. Fig. 2(b) shows another view of the OGS touch panel of Fig. 2(a).

Similar to FIG. 1(a), in this embodiment, the OGS touch panel includes a liquid crystal module (LCM, Liquid Crystal Model) 100, a touch sensing element 104, a plurality of metal traces 108, a glass substrate (cover glass) 110 and a conductive pattern 312. It should be noted that in this embodiment, in order to provide electrostatic protection for a part of the multiple metal wires 108 outside the range of the liquid crystal module 100, the conductive pattern 312 is designed as a mesh structure, and the conductive pattern 312 Partially overlaps a plurality of metal traces 108 .

In more detail, in FIG. 2( a ), one side of the conductive pattern 312 and the edge of the liquid crystal module 100 are located on the same straight line in the vertical direction. When a part of the metal wiring 108 exceeds the scope of the liquid crystal module 100 , since the layout area of the conductive pattern 312 is sufficient to surround and cover this part of the wiring, it can effectively protect it from static electricity. In other words, the projection of the metal trace 108 in the horizontal direction overlaps with the projection of the conductive pattern 312 in the horizontal direction, and the metal trace 108 corresponding to the overlapping area is protected against electrostatic discharge by the conductive pattern 312 .

In a specific embodiment, the OGS touch panel further includes a flexible printed circuit (FPC) 116, and some terminals of the flexible printed circuit are respectively electrically connected to each of the metal traces 108. , and the other part of the terminal is electrically connected to the ground trace GND, as shown in Figure 2(b).

FIG. 3( a ) shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to another embodiment of the present invention. Figure 3(b) shows an alternative embodiment of the OGS touch panel in Figure 3(a).

The main difference between FIG. 3( a ) and FIG. 2( b ) is that the flexible circuit board 216 of the OGS touch panel includes two ground terminals Pin. The conductive pattern 412 of the OGS touch panel covers and surrounds the metal trace 108 and is also electrically connected to the ground terminal Pin of the flexible circuit board 216 . In this way, the static electricity in the panel is discharged to the ground through the conductive pattern 412 and the ground terminal Pin.

Of course, in the alternative embodiment shown in FIG. 3( b ), the potential of the conductive pattern 412 is not necessarily the ground potential. For example, the conductive pattern 412 is not connected to the ground terminal of the flexible circuit board 216, and its potential is a floating level. The ring structure of the conductive pattern 412 can also realize the metal wiring 108 and/or The touch sensing element 104 is protected against static electricity.

FIG. 4 shows a schematic structural diagram of an OGS touch panel for electrostatic protection according to yet another embodiment of the present invention.

It should be understood that the OGS touch panel in FIG. 4 is the same or similar to the OGS touch panel in FIG. 1 , and for the convenience of description, the common components or structures will not be repeated.

In the embodiment of FIG. 4 , the OGS touch panel includes a shorting bar 500 . The conductive pattern 512 covers the shorting bar 500 for array testing, and the conductive pattern 512 is electrically connected to the ground terminal of the flexible circuit board, so as to discharge the static electricity in the panel to the ground.

Using the OGS touch panel of the present invention, a conductive pattern is placed outside the range of the liquid crystal module, and the conductive pattern covers the metal wiring through a conductive pattern such as a whole area or a mesh structure, so that there is no need to increase the cost or production process. Under this condition, it can effectively prevent the circuit, touch sensing element or other electronic devices from being damaged by static electricity, and improve the overall electrostatic protection capability of the touch panel. In addition, in the OGS touch panel of the present invention, the conductive pattern can only cover the short-circuit bar used for array testing, and the static electricity inside the touch panel can be released through the conductive pattern through the static conduction path provided by the short-circuit bar. land.

Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can understand that without departing from the spirit and scope of the present invention, various changes and substitutions can be made to the specific embodiments of the present invention. These changes and substitutions all fall within the scope defined by the claims of the present invention.

Claims (10)

1. An OGS (One Glass Solution) touch panel adapted to improve electrostatic protection capability, the OGS touch panel comprising:

a liquid crystal module;

the touch sensing element is arranged on a first insulating layer, and the first insulating layer is positioned above the liquid crystal module;

the touch sensing device comprises a plurality of metal wires, a first insulating layer and a second insulating layer, wherein the metal wires are arranged on the first insulating layer;

the glass substrate is arranged above the second insulating layer; and

and the conductive pattern is positioned outside the range of the liquid crystal module and arranged on the first insulating layer, and the OGS touch panel carries out electrostatic protection by virtue of the conductive pattern.

2. The OGS touch panel of claim 1, wherein the conductive pattern is an integral area surrounding the metal traces.

3. The OGS touch panel of claim 1, wherein the conductive pattern is a mesh structure surrounding the metal traces.

4. The OGS touch panel of claim 1, wherein the conductive pattern is a mesh structure and partially overlaps the metal traces, thereby performing electrostatic protection on the metal traces outside the liquid crystal module.

5. The OGS touch panel of claim 1, wherein the conductive pattern is electrically connected to a ground pin of a flexible circuit board.

6. The OGS touch panel of claim 1, wherein the conductive pattern is floating (floating) in potential.

7. The OGS touch panel of claim 1, wherein the conductive pattern is made of ITO.

8. The OGS touch panel of claim 1, further comprising an adhesive layer for bonding the liquid crystal module and the first insulating layer.

9. An OGS (One Glass Solution) touch panel adapted to improve electrostatic protection capability, the OGS touch panel comprising:

a liquid crystal module;

the touch sensing element is arranged on a first insulating layer, and the first insulating layer is positioned above the liquid crystal module;

the touch sensing device comprises a plurality of metal wires, a first insulating layer and a second insulating layer, wherein the metal wires are arranged on the first insulating layer;

the glass substrate is arranged above the second insulating layer; and

the conductive pattern covers a short bar (shorting bar) of the OGS touch panel for array test, and is electrically grounded so as to realize electrostatic protection of the OGS touch panel.

10. The OGS touch panel of claim 9, wherein the conductive pattern is made of ITO.

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