TW201419055A - Touch panel - Google Patents

Abstract

The touch panel of the present invention includes at least a first transparent substrate, and upper sensing patterns, upper metal wire, lower sensing patterns, lower metal wire and shielding structure located on the first transparent substrate. The upper metal wire and lower metal wire are located at the wiring area respectively, and the shielding structure is located between the upper metal wire and the lower metal wire, so that even if the upper metal wire and the lower metal wire overlap with each other, their mutual interference can be avoided to reduce the wiring area, and to achieve the purpose of narrowing the touch panel wiring region.

Description

Touch panel

The present invention relates to a touch panel, and more particularly to a touch panel that can reduce the wiring area and narrow the touch panel wiring area.

In recent years, touch-sensitive human-machine interfaces, such as touch panels, have been widely used in a wide variety of electronic products, such as Global Positioning System (GPS), Personal Digital Assistant (PDA). , cellular phones and handheld computers (Hand-held PCs) to replace traditional input devices (such as keyboards and mice), this design has changed dramatically, not only to enhance these electronic devices The human-machine interface affinity, because of the omission of the traditional input device, frees up more space for the display panel to facilitate the user to browse the data.

Please refer to the first figure (A), (B), which is a plan perspective view of a conventional touch circuit. As shown in the first figures (A) and (B), the conventional touch device 1 mainly includes a sensing electrode structure 12 and a peripheral connecting line 13. The area covered by the sensing electrode structure 12 is defined as a touch area for sensing a touch operation of the user. The area covered by the peripheral connection line 13 is defined as a wiring area, and the peripheral connection line 13 is electrically connected to the sensing electrode structure 12, and the peripheral connection line 13 is also electrically connected to an external detecting circuit (not shown).

When the human hand (or other electrical conductor) touches the touch device 1 , the sensing electrode structure 12 of the touch device generates a capacitance change due to the touch of the human hand and the capacitance generated by the sensing electrode structure 12 via the peripheral connection line 13 . The change is passed to an external detection circuit. The detection circuit can detect the change of the capacitance and calculate the person The coordinates touched by the hand.

Due to the continuous improvement of the manufacturing technology of the display panel and the demand of the large window, the frame design of the display panel is narrower and narrower, so that the width of the frame of the touch device needs to be changed along with the frame design of the display panel, and the surrounding area is connected. The wiring area of the connecting line is drastically reduced, which not only directly tests the ability of the touch device circuit design, but also forms a design obstacle. Therefore, there are several ways to solve the wiring problem caused by the narrow bezel:

1. The line width is refined to reduce the wiring area, but the resistance is increased, the voltage drop is increased, and the signal attenuation is susceptible to interference. Further, the line width is refined to increase the processing difficulty and the yield is reduced.

2. Overlap lines are used to reduce the wiring area, but the method of overlapping the lines on the transparent conductive glass substrate causes interference between the surrounding connecting lines and an increase in the risk of short circuit.

According to the above, how to develop a better structure to connect the peripheral connecting lines between narrow frames without interfering with each other has become an important issue for designers and manufacturers of today's touch panels. .

In view of the above, the present invention provides a touch panel which provides a touch panel which can reduce the wiring area and narrow the touch panel wiring area, and is a main target thereof.

In order to achieve the above, the touch panel of the present invention comprises at least: a first transparent substrate and a sensing pattern, an upper metal wire, a lower sensing pattern, a lower metal wire, and a shielding structure on the first transparent substrate. The shielding structure is located between the upper metal wire and the lower metal wire.

Even if the upper metal wire and the lower metal wire overlap each other, mutual interference can be avoided, the wiring area can be reduced, the purpose of narrowing the wiring area of the touch panel can be achieved, and the human body can be prevented from directly contacting the wiring area to interfere with the interpretation.

In order to achieve the above objective, the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and the lower sensing pattern is disposed on the first transparent substrate. a lower surface of the substrate, wherein the shielding structure is disposed on the upper surface of the first transparent substrate, and the upper metal wire is disposed on the insulating layer.

In order to achieve the above objective, the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and the lower sensing pattern is disposed on the first transparent substrate. a lower surface of the substrate, wherein the shielding structure is disposed on the lower surface of the first transparent substrate, and the lower metal wire is disposed under the insulating layer.

For the above purpose, the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and a second transparent substrate is disposed on the first surface. The lower sensing surface is disposed on the second transparent substrate, and the shielding structure is disposed on the upper surface of the first transparent substrate, and the upper metal wire is disposed on the insulating layer.

For the above purpose, the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and a second transparent substrate is disposed on the first surface. The lower surface of the transparent substrate is disposed on the lower surface of the first transparent substrate, and the lower metal wire is disposed under the insulating layer.

To achieve the above object, the first transparent substrate and the second transparent substrate are adhered to each other by using an optical adhesive.

To achieve the above object, a protective layer is further disposed on the first transparent substrate.

In order to achieve the above object, the protective layer is formed under the protective layer with respect to the wiring region. Masking layer.

To achieve the above purpose, the first transparent substrate and the protective layer are adhered to each other by using an optical adhesive.

The conductive layer described above may be a transparent conductive material.

The features of the present invention can be clearly understood by referring to the drawings and the detailed description of the embodiments.

2(A) and (B) are schematic structural views of a touch panel of the present invention, and FIG. 3 is a cross-sectional view showing a first embodiment of the touch panel of the present invention. The touch panel 2 of the present invention includes at least There are: a first transparent substrate 21, an upper sensing pattern 22, an upper metal wire 23, a lower sensing pattern 24, a lower metal wire 25, and a shielding structure 26, wherein: The first transparent substrate 21 is formed with a visible area 211 and a wiring area 212. The wiring area 212 is located around the outside of the visible area 211, and the first transparent substrate 21 is provided with opposite upper and lower surfaces 213, 214.

The upper sensing pattern 22 is provided with a plurality of sensing series 221 arranged in a first direction and located in the visible area 211 of the first transparent substrate. In the embodiment shown in the figure, the upper sensing pattern 21 is provided. On the first transparent substrate upper surface 213.

The plurality of metal wires 23 are located in the wiring region 212 of the first transparent substrate, and are respectively connected to the sensing series 221 of the upper sensing patterns.

The lower sensing pattern 24 is provided with a plurality of sensing series 241 arranged in a second direction, and interlaced with the sensing series 221 above the upper sensing pattern, and the lower sensing pattern 24 is located at the first transparent The visible region 211 of the substrate is disposed on the first transparent substrate lower surface 214.

The plurality of metal wires 25 are located on the wiring region 212 of the first transparent substrate, and are respectively connected to the lower sensing series 241 of the lower sensing pattern, and are disposed on the first transparent substrate lower surface 214.

The shielding structure 26 is disposed on the wiring region 212 of the first transparent substrate, and is disposed on the first transparent substrate upper surface 213 and located between the upper metal wire 23 and the lower metal wire 25, and the shielding structure 26 is provided with a conductive The layer 261, a grounding wire 262 and an insulating layer 263, the conductive layer 261 is connected to the grounding wire 262, and the insulating layer 263 is located on the surface of the conductive layer 261, and the upper metal wire 23 is disposed on the insulating layer 263; The layer 261 can be a transparent conductive material that can be completed simultaneously with the upper sensing pattern 22 during fabrication.

The shielding structure 26 is disposed between the upper metal wire 23 and the lower metal wire 25, so that the upper metal wire 23 and the lower metal wire 25 are vertically overlapped and disposed on the first transparent substrate 21, thereby avoiding mutual interference and reducing the wiring area. The purpose of narrowing the wiring area of the touch panel is achieved, and the human body can be prevented from directly contacting the wiring area to interfere with the interpretation.

As shown in the second embodiment of the fourth figure, the upper sensing pattern 22 is disposed on the first transparent substrate upper surface 213, and the lower sensing pattern 24 is disposed on the first transparent substrate lower surface 214, and the shielding structure 26 is provided. The first transparent substrate lower surface 214 is disposed, and the lower metal wire 25 is disposed under the insulating layer 263.

As shown in the third embodiment of the fifth embodiment, the upper sensing pattern 22 is disposed on the first transparent substrate upper surface 213, and the second transparent substrate 27 is adhered to the first transparent substrate by the optical adhesive 28. The surface 214, the lower sensing pattern 24 is disposed on the second transparent substrate 27, and the shielding structure 26 is disposed on the first transparent substrate upper surface 213, and the upper metal wire 23 is disposed on the insulating layer 263.

As shown in the fourth embodiment of the sixth figure, the upper sensing pattern 22 is set at the first The transparent substrate upper surface 213, and a second transparent substrate 27 is adhered to the first transparent substrate lower surface 214 by the optical adhesive 28, and the shielding structure 26 is disposed on the first transparent substrate lower surface 216, and the lower metal The wire 25 is disposed under the insulating layer 263.

In the above embodiments, a protective layer 29 is further disposed on the first transparent substrate 21. As shown in the fifth embodiment of the seventh embodiment, the optical adhesive 28 can be utilized between the first transparent substrate 21 and the protective layer 29. Adhesively adhered to each other, and a shielding layer 291 is formed under the protective layer 29 with respect to the wiring region 212. The shielding layer 291 can shield the metal wires 23 and the lower metal wires 25 on the lower side to achieve an aesthetic effect.

In summary, the present invention provides a preferred and feasible touch panel, and the invention patent application is provided according to the law; the technical content and technical features of the present invention are disclosed above, but those skilled in the art may still be based on the present invention. The disclosure is made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should be construed as being limited by the scope of the appended claims

1‧‧‧ touch device

12‧‧‧Sensor electrode structure

13‧‧‧ peripheral cable

2‧‧‧ touch panel

21‧‧‧First transparent substrate

211‧‧‧visible area

212‧‧‧ wiring area

213‧‧‧ upper surface

214‧‧‧ lower surface

22‧‧‧Sensing pattern

221‧‧‧Sensing series

23‧‧‧Upper metal wire

24‧‧‧ under sensing pattern

241‧‧‧ Sense series

25‧‧‧Metal wire

26‧‧‧Shield structure

261‧‧‧ Conductive layer

262‧‧‧Grounding conductor

263‧‧‧Insulation

27‧‧‧Second transparent substrate

28‧‧‧Optical adhesive

29‧‧‧Protective layer

291‧‧‧Shielding layer

The first figures (A) and (B) are plan perspective views of a conventional touch circuit.

The second figures (A) and (B) are schematic structural views of the touch panel of the present invention.

The third figure is a cross-sectional view showing the structure of the first embodiment of the touch panel of the present invention.

The fourth figure is a cross-sectional view showing the structure of the second embodiment of the touch panel of the present invention.

Figure 5 is a cross-sectional view showing the structure of a third embodiment of the touch panel of the present invention.

Figure 6 is a cross-sectional view showing the structure of the fourth embodiment of the touch panel of the present invention. Figure.

Figure 7 is a cross-sectional view showing the structure of a fifth embodiment of the touch panel of the present invention.

2‧‧‧ touch panel

21‧‧‧First transparent substrate

213‧‧‧ upper surface

214‧‧‧ lower surface

22‧‧‧Sensing pattern

23‧‧‧Upper metal wire

24‧‧‧ under sensing pattern

25‧‧‧Metal wire

26‧‧‧Shield structure

261‧‧‧ Conductive layer

262‧‧‧Grounding conductor

263‧‧‧Insulation

Claims (10)

A touch panel includes at least a first transparent substrate formed with a visible area and a wiring area, the wiring area being located outside the visible area, and an upper sensing pattern located on the first transparent substrate The upper metal wire is located in the wiring area of the first transparent substrate and is connected to the upper sensing pattern; the lower sensing pattern is located in the visible area of the first transparent substrate, and the upper sensing pattern Interlaced with each other; a lower metal wire is disposed in the wiring area of the first transparent substrate and connected to the lower sensing pattern; and a shielding structure is disposed on the wiring area of the first transparent substrate and located thereon Between the metal wire and the lower metal wire, the shielding structure is provided with a conductive layer, a grounding wire and an insulating layer. The conductive layer is connected to the grounding wire, and the insulating layer is located on the surface of the conductive layer. The touch panel of claim 1, wherein the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and the lower sensing pattern is The shielding structure is disposed on the upper surface of the first transparent substrate, and the shielding structure is disposed on the upper surface of the first transparent substrate, and the upper metal wire is disposed on the insulating layer. The touch panel of claim 1, wherein the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and the lower sensing pattern is The shielding structure is disposed on the lower surface of the first transparent substrate, and the shielding structure is disposed on the lower surface of the first transparent substrate, and the lower metal wire is disposed under the insulating layer. The touch panel of claim 1, wherein the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and the second transparent substrate is further transparent. The substrate is disposed on the lower surface of the first transparent substrate, and the lower sensing pattern is disposed on the second transparent substrate, and the shielding structure is disposed on the upper surface of the first transparent substrate, and the upper metal wire is disposed Above the insulating layer. The touch panel of claim 1, wherein the first transparent substrate is provided with an upper surface and a lower surface, and the upper sensing pattern is disposed on the upper surface of the first transparent substrate, and the second transparent substrate is further transparent. The substrate is disposed on the lower surface of the first transparent substrate, and the shielding structure is disposed on the lower surface of the first transparent substrate, and the lower metal wire is disposed under the insulating layer. The touch panel of claim 4 or 5, wherein the first transparent substrate and the second transparent substrate are adhered to each other by using an optical adhesive. The touch panel of any one of claims 1 to 5, wherein a protective layer is further disposed on the first transparent substrate. The touch panel of claim 7, wherein a shielding layer is formed under the protective layer with respect to the wiring region. The touch panel of claim 7, wherein the first transparent substrate protective layer is adhered to each other by using an optical adhesive. The touch panel of any one of claims 1 to 5, wherein the conductive layer is a transparent conductive material.