TW201519022A - Touch panel - Google Patents

Abstract

A touch panel having a touch zone and a peripheral circuit zone outside the touch zone is provided. The touch panel includes a plurality of first conductive elements, a plurality of second conductive elements, a plurality of first signal transmission wires, a plurality of second signal transmission wires and a pair of first protection wires. The first conductive elements and the second conductive elements are disposed in the touch zone. At least a part of the first signal transmission wires and at least a part of the second signal transmission wires are disposed in the peripheral circuit zone. The first signal transmission wires are connected to the first conductive elements, and the second signal transmission wires are connected to the second conductive elements. The pair of first protection wires are disposed between the adjacent first signal transmission wire and the second signal transmission wire in the peripheral circuit zone.

Description

Touch panel

The present invention relates to a touch panel, and more particularly to a touch panel having better electrostatic discharge protection capability.

Substances in nature can acquire or lose electrons (such as friction or induced electrification) through a process, and such charges are called static electricity. When these positive or negative charges are gradually accumulated, a potential difference is generated from the surrounding environment. If the charge is transferred between different potentials via the discharge path, it is called an electrostatic discharge (ESD). Electrostatic discharge is a major cause of damage to most electronic components or electronic systems due to Electrical Overstress (EOS). Therefore, in general, electronic products have certain specifications for the protection of electrostatic discharge.

Taking a touch sensor as an example, at present, the touch sensor can enhance the ability to resist electrostatic discharge in various ways. For example, one uses a grounded metal ring to surround the touch element, and another, An ITO film similar in size to the touch sensor is grounded and overlapped with the touch sensor. However, the above methods are still limited to improve the electrostatic discharge problems encountered during the process, and The indium tin oxide film will increase the overall cost of the touch sensor and reduce the light transmittance.

The invention provides a touch panel which is designed through a layout to enhance the electrostatic protection capability and at the same time avoid interference of signal transmission lines transmitting different signals. Further, the shielding wire provided by the invention is more advantageous for the densely illuminating the signal transmission line in the peripheral line region, so as to achieve the application trend of the narrow frame.

A touch panel of the present invention has a touch area and a peripheral line area outside the touch area. The touch panel includes a plurality of first conductive elements, a plurality of second conductive elements, and a plurality of first signals. a transmission line, a plurality of second signal transmission lines, and a pair of first guard wires. The first conductive elements and the second conductive elements are disposed in the touch area. At least a portion of the first signal transmission lines and at least a portion of the second signal transmission lines are disposed in the peripheral line region. The first signal transmission line is electrically connected to the first conductive element, and the second signal transmission line is electrically connected to the second conductive element. The pair of first guard wires are disposed between two adjacent first signal transmission lines and second signal transmission lines in the peripheral line region.

In an embodiment of the invention, the first conductive elements respectively extend in a first direction in the touch area, and the second conductive elements respectively extend in a second direction in the touch area, wherein the first direction is The second direction intersects.

In an embodiment of the invention, at least a portion of the first signal transmission lines, at least a portion of the second signal transmission lines, and at least a portion of the pair of first protection wires are disposed on a same layer of the touch panel.

In an embodiment of the invention, the wire diameter of each of the first shielding wires is substantially equal to the wire diameter of the adjacent first signal transmission line and the second signal transmission line.

In an embodiment of the invention, the shortest distance between each of the first guard wires and the adjacent first signal transmission line or the second signal transmission line is not less than 15 micrometers.

In an embodiment of the invention, the pitch of the pair of first guard wires is not less than 15 micrometers.

In an embodiment of the invention, a plurality of pads are further connected to a circuit board, and the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires are respectively connected to two of the pads. And the pair of first guard wires are connected to a ground potential via the circuit board.

In an embodiment of the invention, the first conductive elements are non-intersecting with the second conductive elements, and the first conductive elements are disposed adjacent to the second conductive elements.

In an embodiment of the invention, a plurality of pads are further included for connecting to a circuit board, and the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires are integrated and connected to each other near the pads. One of these pads.

In an embodiment of the invention, the second protection wire is disposed between the pair of first protection wires, and the wire diameter of the second protection wire is not less than the wire diameter of each of the first protection wires.

In an embodiment of the invention, the distance between the second guard wire and each of the first guard wires is not less than 15 micrometers.

In an embodiment of the invention, a plurality of pads are further included for connecting to one a circuit board, the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires and the second protection wires are respectively connected to three of the pads, and the pair of first protection wires and the second protection wires are connected to the circuit board Connect to a ground potential.

In an embodiment of the invention, a plurality of pads are further included for connecting to a circuit board, and the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires and the second protection wires are gathered near the pads. It is integrated and connected to one of these pads.

In an embodiment of the invention, the second guard wire has a wire diameter greater than 0.4 mm.

In an embodiment of the invention, the second guard wire has a plurality of slits arranged in a staggered manner, the slits being parallel to the extending direction of the second guard wire. Wherein, the length of the slit may be no more than 1 mm.

In an embodiment of the invention, the method further includes a grounding wire and a plurality of pads, the grounding wire surrounding the peripheral circuit region, the pads are disposed in the peripheral circuit region and are connected to a circuit board, and the grounding wire has two ends. Each end has at least one branch, and both ends of the ground line and the branches are respectively connected to the pads.

In an embodiment of the invention, the pair of first guard wires respectively have an extension portion disposed between the adjacent first conductive element and the second signal transmission line or the adjacent second conductive element and Between the first signal transmission lines.

In an embodiment of the invention, the extension portion is a bent structure.

In an embodiment of the invention, a pair of third protection lines are further included, wherein the number of the touch areas is plural, and the touch areas are separated by a third protection line.

In an embodiment of the invention, the pitch of the pair of third guard lines is not less than 15 micrometers.

In an embodiment of the invention, each of the third guard wires has a wire diameter substantially equal to a wire diameter of the adjacent first signal transmission line or the second signal transmission line.

In an embodiment of the invention, the second protection wire is disposed between the pair of third protection wires, and the wire diameter of the second protection wire is not less than the wire diameter of each of the third protection wires.

In an embodiment of the invention, a decorative layer is further disposed on the peripheral circuit area, and the first signal transmission lines, the second signal transmission lines and the pair of first protection wires are disposed on the decorative layer.

Based on the above, the touch panel of the present invention prevents a first signal transmission line and the second signal transmission lines by arranging a pair of first guard wires between the first signal transmission lines in the peripheral line region and the second signal transmission lines. The signals between each other interfere with each other and at the same time provide the ability to protect against electrostatic discharge.

The above described features and advantages of the invention will be apparent from the following description.

Z1‧‧‧ touch area

Z2‧‧‧ peripheral line area

D1‧‧‧ first direction

D2‧‧‧ second direction

H1‧‧‧ wire diameter of the first protective conductor

H2‧‧‧ wire diameter of the second protective conductor

10‧‧‧Soft circuit board

100, 200, 600‧‧‧ touch panels

105, 605‧‧‧ substrate

110, 610‧‧‧ first conductive element

112, 612‧‧‧ first conductive unit

114, 614‧‧‧ First Interleaved Division

120, 620‧‧‧ second conductive element

122, 622‧‧‧ second conductive unit

124, 624‧‧‧Second Interleaved Division

130, 230, 330, 430, 530, 630‧‧‧ first protective conductor

140, 240, 340, 440, 640‧‧‧ pads

150, 650‧‧‧ insulation pattern

160‧‧‧Auxiliary pattern

170, 270, 370, 570, 670‧‧‧ first signal transmission line

180, 280, 380, 580, 680‧‧‧ second signal transmission line

185, 685‧‧‧ grounding wire

185a, 685a‧‧ branch

390, 490, 590‧‧‧ second protective conductor

592‧‧‧Slit

626‧‧‧Sensor unit

628‧‧‧Third signal transmission line

632‧‧‧Extension

635‧‧‧ Third protective conductor

642‧‧‧Auxiliary pads

690‧‧‧Decorative layer

1A is a partial schematic view of a touch panel in accordance with a first embodiment of the present invention.

FIG. 1B is a partially enlarged schematic view of the touch panel of FIG. 1A.

Fig. 1C is a partially enlarged schematic view of Fig. 1B.

2 is a partially enlarged schematic view showing a touch panel in a peripheral line region according to a second embodiment of the present invention.

3 is a partially enlarged schematic view showing a touch panel in a peripheral line region according to a third embodiment of the present invention.

4 is a partially enlarged schematic view showing a touch panel in a peripheral line region according to a fourth embodiment of the present invention.

FIG. 5 is a partial schematic view of a touch panel in a peripheral line region according to a fifth embodiment of the present invention.

FIG. 6 is a schematic diagram of a touch panel in accordance with a sixth embodiment of the present invention.

1A is a partial schematic view of a touch panel in accordance with a first embodiment of the present invention. In FIG. 1A, only a part of the touch panel 100 is illustrated in order to more clearly show the features of the embodiment. Referring to FIG. 1A, the touch panel 100 of the present embodiment has a touch area Z1 and a peripheral line area Z2 outside the touch area Z1. The touch panel 100 includes a substrate 105 , a plurality of first conductive elements 110 , a plurality of second conductive elements 120 , a pair of first guard wires 130 , a plurality of pads 140 , a plurality of insulating patterns 150 , and a plurality of auxiliary patterns 160 . a plurality of first signal transmission lines 170 and a plurality of second signal transmission lines 180. The first conductive element 110 is insulated from the second conductive element 120. By the first conductive element 110 and the second conductive element 120, if a conductive object (such as a finger) approaches or contacts the surface of the touch panel 100, the object will be phased. A coupling capacitance is formed between the adjacent conductive elements 110, 120, so that a change in the capacitance effect occurs in an approaching or contact area of the object to detect the position or movement of the object. Wherein, the object can be touch-operated on the outer surface of the touch insulation via an insulator, such as a cover lens. Alternatively, the object can be accessed without touching the touch panel for a hovering touch operation. In addition, regarding the contact coordinate related measuring method of the capacitive touch panel, reference may be made to the currently known contact coordinate measuring method, such as a mutual capacitance measuring method, but the present invention is not limited by a specific measuring method.

In the embodiment, in the touch area Z1, the first conductive elements 110 respectively extend along a first direction D1, and the second conductive elements 120 respectively extend along a second direction D2. The first direction D1 intersects the second direction D2. For example, in the embodiment, the first direction D1 is perpendicular to the second direction D2. Each of the first conductive elements 110 may include a plurality of first conductive units 112 and a plurality of first interleaved portions 114, the area of the first conductive units 112 being larger than the area of the first staggered portions 114. Each of the second conductive elements 120 may include a plurality of second conductive units 122 and a plurality of second interleaved portions 124, the area of the second conductive units 122 being larger than the area of the second interlaced portions 124. The first conductive unit 112 and the second conductive unit 122 do not overlap each other. Although in FIG. 1A, the first interlaced portion 114 overlaps with the second interlaced portion 124 due to the viewing angle relationship, an insulating pattern 150 is actually disposed between the first interleaved portion 114 and the second interleaved portion 124 to make the first interlace The portion 114 is insulated from the second interlaced portion 124 without being in contact. In this embodiment, the first conductive elements 110 and the second conductive elements 120 are disposed on the same side of a substrate 105, and the plurality of insulating patterns 150 are discretely disposed on the first interlaced portion 114 and the second interleaved portion, respectively. Between 124. However, in a variant embodiment not shown, The first conductive element and the second conductive element disposed on the same side of the substrate may also be insulated by a patterned insulating layer, wherein the patterned insulating layer is disposed between the conductive element and the substrate and has a plurality of through holes. The through hole is configured to electrically connect the first staggered portion to the first conductive unit. Moreover, in a variant embodiment not shown, the first conductive element and the second conductive element disposed on the same side of the substrate may also be insulated by a whole insulating layer.

The plurality of auxiliary patterns 160 are disposed in the interval of the non-overlapping region between the first conductive element 110 and the second conductive element 120, and the refractive index of the auxiliary pattern 160 is similar to or the same as the first conductive unit 110 and the second conductive unit 120. By avoiding the pattern profile of the first conductive element 110 and the second conductive element 120 being seen by the user. For example, the auxiliary pattern 160 may be the same material as the first conductive unit 110 and the second conductive unit 120, but insulated from the first conductive unit 110 and the second conductive unit 120.

In this embodiment, the first signal transmission lines 170 and the second signal transmission lines 180 are disposed on the same layer of the touch panel 100. However, in a variant embodiment, a portion of the first signal transmission lines 170 and a portion of the second signal transmission lines 180 may be disposed on different layers of the touch panel 100, but in the pads 140 of the peripheral line region Z2. In the vicinity, the other portions of the first signal transmission lines 170, the other portions of the second signal transmission lines 180 and the pair of first shielding wires 130 may be disposed on the same layer of the touch panel 100. One end of the first signal transmission line 170 is electrically connected to the first conductive element 110, and one end of the second signal transmission line 180 is electrically connected to the second conductive element 120, respectively. The number transmission line 170 and the second signal transmission line 180 are used to connect the first conductive element 110 and the second conductive element 120 to a capacitance sensing circuit. The first signal transmission line 170 and the second signal transmission line 180 transmit different signals. For example, the capacitance sensing circuit can transmit the driving signal to the first signal transmission line 170 and receive the signal from the second signal transmission line 180. However, the present invention does not. This is limited to this. The first signal transmission line 170 is insulated from the second signal transmission line 180 and spatially separated to avoid a capacitive coupling effect between the first signal transmission line 170 and the second signal transmission line 180 to interfere with each other, and the first signal transmission line 170 and the second signal A pair of first guard wires 130 are disposed between the transmission lines 180.

FIG. 1B is a partially enlarged schematic view of the touch panel of FIG. 1A. Fig. 1C is a partially enlarged schematic view of Fig. 1B. Referring to FIG. 1A , FIG. 1B and FIG. 1C , each pair of first protection wires 130 are respectively disposed adjacent to the first signal transmission line 170 and the second signal transmission line 180 . The shortest distance between each of the first guard wires 130 and the adjacent first signal transmission line 170 and the second signal transmission line 180 may be not less than 15 micrometers, and each pair of first guard wires 130 is provided. The pitch can be no less than 15 microns. The first signal transmission line 170 is separated from the second signal transmission lines 180 by the pair of first protection wires 130, that is, the first signal transmission line 170 or the second signal does not exist between each pair of the first protection wires 130. Transmission line 180. The pads 140 are disposed in the peripheral line region Z2 and are electrically connected to the other ends of the first signal transmission lines 170, the pair of first guard wires 130, and the other ends of the second signal transmission lines 180, respectively. The pads 140 can be connected to corresponding pins of a flexible circuit board 10 to connect the first conductive component 110 with the second conductive component 120. The capacitor sensing circuit is connected to the flexible circuit board 10, and the pair of first shielding wires 130 are connected to a ground potential.

In this embodiment, the wire diameter of each of the first shielding wires 130 is equal to the wire diameter of the adjacent first signal transmission line 170 and the second signal transmission line 180. However, the error may occur when the first protection wires 130 are formed. Therefore, the wire diameters of the first protection wires 130 may not be completely equal to the wire diameters of the first signal transmission lines 170 and the second signal transmission lines 180. There is, for example, a difference of 5 microns. In this embodiment, the wire diameters of the first signal transmission line 170, the second signal transmission line 180, and the first shielding wire 130 are both about 30 micrometers, but are not limited thereto.

In addition, in this embodiment, the shortest distance between the adjacent first signal transmission line 170 and the second signal transmission line 180 is about 9 times (ie, 270 micrometers) of the diameter of the first signal transmission line 170 or the second signal transmission line 180. The shortest distance between the first guard wire 130 and the adjacent first signal transmission line 170 or the second signal transmission line 180 is about twice (ie, 60 micrometers) of the diameter of the first signal transmission line 170 or the second signal transmission line 180. Only a preferred embodiment is presented herein, but the invention is not limited thereto.

In this embodiment, the grounding line 185 is selectively disposed on the periphery of the touch panel 100 to surround the peripheral line region Z2 to prevent external static electricity from causing electrostatic discharge to cause damage to the touch panel 100. The two ends of the grounding wire 185 may respectively have at least one branch 185a, so that both ends of the grounding wire 185 and the branches 185a can be respectively connected to the pads 140. In this embodiment, the two ends of the grounding wire 185 respectively have a branch 185a for connecting the grounding wire 185 to the four pads 140. Thereby providing a lower contact impedance and facilitating the catharsis of static electricity to improve the electrostatic discharge protection effect. The grounding wire 185 is connected to the pins on the flexible circuit board 10 by these pads 140 and connected to the same ground potential. It should be noted that the present invention does not limit the number of pads 140 to which the ground line 185 is connected.

In this embodiment, the first conductive element 110, the second conductive element 120, the first guard wire 130, the pad 140, the insulation pattern 150, the auxiliary pattern 160, the first signal transmission line 170, and the second signal transmission line 180 may be disposed on The same side of the same substrate 105. In this embodiment, the substrate 105 can be a cover plate, which can be made of tempered glass or other hard light transmissive material. Thereby, the touch panel 100 is made thinner and lighter. However, the substrate 105 may be a color filter substrate, a flexible film substrate, an upper cover of the display panel, or a lower substrate of the display panel. When the substrate 105 is a cover plate, in the peripheral line region Z2, a decorative layer (not shown) may be selectively disposed on the substrate 105 to shield the visible signal transmission line and the like. In addition, a pair of bit relationships can be formed by the ground line 185 and the alignment mark on the flexible circuit board 10, for example, the ground line 185 is aligned with the alignment mark on the flexible circuit board 10, so that the pins of the flexible circuit board 10 can be made. It is more accurate with the alignment of the pads 140 and improves the alignment efficiency. The alignment mark on the flexible circuit board 10 can be formed on the joint surface or the non-joining surface opposite to the joint surface, and the flexible circuit board 10 can be a light transmissive material.

The touch panel 100 of the present embodiment can effectively reduce the capacitive coupling effect between the adjacent first signal transmission line 170 and the second signal transmission line 180 by arranging a pair of first guard wires 130. For example, in the embodiment, the result of the simulation is between the adjacent first signal transmission line 170 and the second signal transmission line 180. The sensed capacitance is only about 0.0387 picofarads (pF) to 0.0402 picofarads (pF). That is to say, by configuring a pair of first guard wires 130, interference between the first signal transmission line 170 and the second signal transmission line 180 can be effectively reduced to avoid contact detection being affected. In addition, when the touch panel 100 is not connected to the flexible circuit board 10, for example, during the manufacturing process of the touch panel 100, since the impedance of the first guard wire 130 is small, it can be used as a charge venting path, that is, Compared with the first signal transmission line 170 and the second signal transmission line 180, the static electricity is more likely to stay on the first protection wire 130, thereby preventing the touch panel 100 from being damaged by electrostatic discharge and affecting the sensing. In addition, since the wire diameter of the first protection wire 130 is close to the wire diameter of each of the first signal transmission lines 170 and the second signal transmission lines 180, the static electricity remaining on the first protection wire 130 does not easily cause the adjacent first signal transmission line 170 and The second signal transmission line 180 is damaged.

Although the above embodiment takes the first conductive element 110 and the second conductive element 120 as an example, in other embodiments not shown, the first conductive element does not intersect the second conductive element, for example, the first conductive The elements and the second conductive elements extend in the same direction. The first conductive element is disposed adjacent to the second conductive element to form a capacitive coupling effect therebetween.

2 is a partially enlarged schematic view showing a touch panel in a peripheral line region according to a second embodiment of the present invention. Referring to FIG. 2, the main difference between this embodiment and the previous embodiment is that in FIG. 1C, the pair of first guard wires 130 are respectively connected to different pads 140. In this embodiment, the pair of first guard wires 230 of the touch panel 200 are integrated and connected to the same pad 240 near the pads 240 to save the number of the pads 240, thereby reducing the cost. This embodiment is also used in the first message. A pair of first guard wires 230 are disposed between the signal transmission line 270 and the second signal transmission line 280 to avoid interference between the first signal transmission line 270 and the second signal transmission line 280 and improve the antistatic discharge capability of the touch panel 200. In particular, the electrostatic discharge damage of the touch panel 200 during the manufacturing process is avoided.

3 is a partially enlarged schematic view showing a touch panel in a peripheral line region according to a third embodiment of the present invention. Referring to FIG. 3, in this embodiment, a second guard wire 390 is further disposed between the pair of first guard wires 330, and the second guard wire 390 and the pair of first guard wires 330 are respectively connected to different ones. Pad 340. The wire diameter H2 of the second guard wire 390 is not less than the wire diameter H1 of each of the first shield wires 330. For example, in the present embodiment, the wire diameter H2 is larger than the wire diameter H1, that is, the second shielding wire 390 has a larger area to improve the charge venting efficiency. In addition, although when the wire diameter H2 is larger than the wire diameter H1, the impact of such a second shielding wire 390 by a large current may cause an arc jump, but the pair of first shielding wires 330 located on both sides of the second shielding wire 390 may still be The charge from the second guard wire 390 is vented to avoid affecting the first signal transmission line 370 and the second signal transmission line 380. The pad 340 can connect the second guard wire 390 to a ground potential by being pressed into conduction with the flexible circuit board.

In addition, the distance between the second guard wire 390 and each of the first guard wires 330 is not less than 15 micrometers. In this embodiment, the distance between the second guard wire 390 and each of the first guard wires 330 is about one wire diameter of the first guard wire 330, that is, about 30 micrometers, but the second guard wire 390 and each The spacing between the first guard wires 330 is not limited thereto. In addition, the present invention also does not limit the second protective conductor 390 is disposed between each pair of first guard wires 330. In other embodiments, a plurality of wire diameters H2 may be disposed between each pair of first guard wires 330 not less than each of the first guard wires 330. The second guard wire 390 of the wire diameter H1.

In this embodiment, a pair of first guard wires 330 and a thicker second guard wire 390 are disposed between the first signal transmission line 370 and the second signal transmission line 380, and the first signal transmission line 370 and the second are simulated. The sensed capacitance between the signal transmission lines 380 is further reduced to 0.01359 picofarads (pF) to 0.0208 picofarads (pF), that is, by adding a second guard wire 390 to the pair of first guard wires 330. The interference between the first signal transmission line 370 and the second signal transmission line 380 is more effectively reduced.

4 is a partially enlarged schematic view showing a touch panel in a peripheral line region according to a fourth embodiment of the present invention. Referring to FIG. 4, the main difference between this embodiment and the previous embodiment is that, in FIG. 3, a pair of first guard wires 330 and a second guard wire 390 are respectively connected to different pads 340. In this embodiment, the pair of first guard wires 430 and the second guard wires 490 are integrated and connected to the same pad 440 near the pads 440 to save the number of pads 440, thereby reducing the cost.

FIG. 5 is a partial schematic view of a touch panel in a peripheral line region according to a fifth embodiment of the present invention. When the wire diameter of the second guard wire 590 is large, for example, when the wire diameter of the second guard wire 590 is greater than 0.4 mm, a plurality of slits 592 may be alternately arranged in the second guard wire 590. Since the heat accumulation effect of the process is severe when the wire diameter of the second shield wire 590 is too large, if the second shield wire 590 is further covered with the insulating layer, gas is easily generated to damage the wire. therefore, The condition of thermal accumulation can be improved by forming these slits 592 in the second guard wire 590. These slits 592 may be parallel to the direction in which the second guard wires 590 extend to provide better electrical properties of the second guard wires 590. The length of the slit 592 may be no more than 1 mm to avoid affecting the electrostatic protection effect provided by the second guard wire 590. In the present embodiment, the length of the slit 592 is, for example, 0.4 mm, but is not limited to the above. In the present embodiment, the slit 592 may be formed by removing a portion of the conductive material of the second guard wire 590, but the manner of formation thereof is not limited thereto.

In this embodiment, a pair of first guard wires 530 and a thicker second guard wire 590 are disposed between the first signal transmission line 570 and the second signal transmission line 580, and the second guard wire 590 has a plurality of slits 592. As a result of the simulation, the sensed capacitance between the first signal transmission line 570 and the second signal transmission line 580 is approximately 0.0192 FF (pF) to 0.02 PF (pF). Therefore, the slits 592 not only enable the second guard wires 590 to have better electrical properties, but the configuration still maintains low interference between the first signal transmission line 570 and the second signal transmission line 580.

FIG. 6 is a schematic diagram of a touch panel in accordance with a sixth embodiment of the present invention. Referring to FIG. 6, the touch panel 100 of the present embodiment has two touch areas Z1 and a peripheral line area Z2 outside the touch area Z1. The touch panel 600 includes a plurality of first conductive elements 610, a plurality of second conductive elements 620, a plurality of sensing units 626, a plurality of pairs of first guard wires 630, a pair of third guard wires 635, a plurality of pads 640, and more The insulating pattern 650, the plurality of first signal transmission lines 670, the plurality of second signal transmission lines 680, the plurality of pairs of third signal transmission lines 628, a grounding line 685, and a decorative layer 690.

In this embodiment, the first conductive elements 610 and the second conductive The elements 620 are staggered in a larger touch area Z1. When a conductive object (such as a finger) approaches or contacts the surface of the touch panel 600, the object will form a coupling capacitance with the adjacent first conductive element 610 and the second conductive element 620, thereby occurring in an approaching or contact area of the object. A change in the capacitance effect to detect the position or movement of an object.

In this embodiment, the first signal transmission lines 670 and the second signal transmission lines 680 are disposed on the same layer of the touch panel 600. One end of the first signal transmission line 670 is electrically connected to the first conductive element 610, and one end of the second signal transmission line 680 is electrically connected to the second conductive element 620, and the first signal transmission line 670 and the second signal transmission line 680 are used. The first conductive element 610 and the second conductive element 620 are connected to a capacitive sensing circuit. In order to avoid a capacitive coupling effect between the first signal transmission line 670 and the second signal transmission line 680, and to improve the electrostatic discharge protection capability of the touch panel 600, a first pair is disposed between the first signal transmission line 670 and the second signal transmission line 680. Protective wire 630. Wherein, in the corners of the four corners of the touch area Z1, the non-interconnected conductive elements 610, 620 and the signal transmission lines 670, 680 may interfere with each other due to the close distance, in order to overcome this problem, the first protection The wire 630 may have an extension 632 disposed between the adjacent first conductive element 610 and the second signal transmission line 680 or between the adjacent second conductive element 620 and the first signal transmission line 670, and is not limited to configuration only. Between the adjacent first signal transmission line 670 and the second signal transmission line 680. The extension portion 632 can be a bent structure.

Each of the first conductive elements 610 can include a plurality of first conductive units 612 and The plurality of first interleaving portions 614 have an area larger than the area of the first interlaced portion 614. Each of the second conductive elements 620 may include a plurality of second conductive units 622 and a plurality of second interleaved portions 624 having an area larger than an area of the second interlaced portions 624. The insulation pattern 650 is disposed between the first interlaced portion 614 and the second interleaved portion 624 such that the first interleaved portion 614 and the second interleaved portion 624 are not in contact, and the first conductive element 610 is insulated from the second conductive element 620. .

In addition, the sensing unit 626 is disposed in another smaller touch area Z1 and is connected to the pad 640 through a third signal transmission line 628 located in the peripheral line area Z2. In this embodiment, the sensing unit 626 can provide a function key function. When a conductive object (such as a finger) approaches or contacts the position of the sensing unit 626 on the surface of the touch panel 600, the sensing unit 626 will have a capacitive coupling effect with the finger. The capacitive sensing circuit receives the signal from the third signal transmission line 628 and detects the position or behavior of the finger by the self capacitance touch detection principle and outputs a corresponding command. Instructions can be used to perform functions such as turning on a particular page. However, the present invention does not limit the structure of the sensing unit in the smaller touch area Z1 and the principle of touch detection.

In this embodiment, since the first signal transmission line 670 and the third signal transmission line 628 transmit different signals and are close to each other, in order to avoid signal interference between the first signal transmission line 670 and the third signal transmission line 628, A pair of third guard wires 635 may be disposed between the one signal transmission line 670 and the third signal transmission line 628. Wherein, the related structure of the third protection wire 635 is the same as that of the first protection wire, and the electrostatic discharge protection effect can also be provided. That is, the wire diameter of each of the third guard wires 635 is equal to the adjacent first signal transmission line 670 and the third signal transmission line 628. The wire diameter, the short distance between each of the third guard wires 635 and the adjacent first signal transmission line 670 and the third signal transmission line 628 may be not less than 15 micrometers, and the distance between each pair of third guard wires 635 may be not less than 15 micrometers. In this embodiment, the pair of third guard wires 635 are respectively connected to different pads 640. However, in a variant embodiment, a pair of third guard wires 628 can also be connected to the same pad 640. In addition, the second guard wire can be disposed between the pair of third guard wires 635 to improve the charge venting efficiency. For other descriptions of the third guard wire 635, reference may be made to the previous description of the first guard wire, and thus the present embodiment will not be described again.

In addition, by arranging the grounding wire 685 on the periphery of the touch panel 600 to surround the entire wiring, it is possible to prevent the external static electricity from causing electrostatic discharge and causing damage to the touch panel 600. The two ends of the grounding wire 685 can respectively have a branch 685a, so that the grounding wire 685 can be respectively connected to the four pads 640, thereby providing a lower contact impedance and facilitating the discharge of static electricity to improve the electrostatic discharge protection effect.

It is worth mentioning that, in FIG. 6, in order to clearly show the relationship between the guard wire and the signal transmission line, the first guard wire 630 and the third guard wire 635 are intentionally indicated by thick lines, and the first signal transmission line 670, The second signal transmission line 680 and the third signal transmission line 628 are represented by thin lines. Moreover, the distance between the two adjacent guard wires and the signal transmission line is widened. In fact, the wire diameter of the first guard wire 630 and the third guard wire 635 may be equal to the wire diameter of the first signal transmission line 670, the second signal transmission line 680 or the third signal transmission line 628, and the two adjacent protection wires are respectively connected with the signal. The spacing of the transmission lines can be close to the wire diameter.

In addition, in this embodiment, the first signal transmission line 670 and the second signal Only a pair of first guard wires 630 are disposed between the transmission lines 680. However, in other embodiments, a design similar to that of the third embodiment may be adopted between the first signal transmission line 670 and the second signal transmission line 680, that is, at least one second is disposed between the pair of first protection wires 630. Protective wires to increase charge venting efficiency.

In addition, in a variant of the embodiment, the two ends of each of the first conductive elements 610 or the second conductive elements 620 can be electrically connected to the first signal transmission line 670 or the second signal transmission line 680, that is, The so-called double routing design is used to reduce the signal transmission impedance. However, in this case, the peripheral line region Z2 will be provided with more signal transmission lines, and the non-interconnected conductive elements and the signal transmission lines are closer together and are prone to mutual interference. Similarly, in order to overcome this problem, the first guard wire 630 or the second guard wire may have the extension portion 632 disposed between the conductive elements 610, 620 adjacent to but transmitting different signals and the signal transmission lines 670, 680, not limited to the configuration. The first signal transmission line 670 and the second signal transmission line 680 are adjacent to each other. For the same reason, the third guard wire 635 may have an extension portion disposed between the sensing unit 626 and the signal transmission line 670, 680 adjacent to each other but transmitting different signals, and is not limited to being disposed adjacent to the first signal transmission line 670 and Between the third signal transmission lines 628 or between the second signal transmission line 680 and the third signal transmission line 628. Wherein, the extension portion 632 can be a bent structure.

In addition, in the embodiment, the decorative layer 690 covers the first signal transmission line 670, the second signal transmission line 680, the first protection wire 630, the pad 640, and the ground line 685 except the touch area Z1. To lower the human eye for the above The visibility of the line and the decorative features are provided. In this embodiment, the decorative layer 690 can further cover a portion of the first conductive unit 612 near the edge of the touch area Z1 and a portion of the second conductive unit 622. Since the decorative layer 690 shields the peripheral portion of the touch area Z1, the light transmission range of the touch panel 600 (that is, the area surrounded by the inner contour of the decorative layer 690 in FIG. 6) is smaller than the actual touch area Z1. . In this way, even if the finger position of the user is in the edge of the light transmission range, the finger position is actually located in the touch area Z1, and the sensitivity uniformity felt by the user when operating the touch panel 600 can be improved. .

Although the layout shape of the decorative layer 690 is a frame shape in the present embodiment, the layout shape of the decorative layer 690 is not limited thereto. In other embodiments, the decorative layer 690 may also be formed only in a partial region of the peripheral line region Z2 to form an elongated pattern, an L-shaped pattern, a ㄇ-shaped pattern, or a pattern of other shapes. In addition, the material of the decorative layer 690 is made of a light-resistant material, which is defined as a material through which light is lost through the interface, for shielding components or light in the electronic device that are not to be seen. The material of the decorative layer 690 may include ceramics, diamond-like carbon, ceramics, organic materials, mixtures of organic and inorganic materials, organic-inorganic hybrid compounds, or composite laminates thereof. The decorative layer 690 can be a single layer structure of a single material, a multilayer stack structure, or a multilayer stack structure of a plurality of materials. For example, the material of the decorative layer 120 may be a high temperature resistant (for example, greater than 200 ° C) photosensitive resin (such as photoresist) or a high temperature resistant non-photosensitive resin (such as ink).

In this embodiment, the first conductive element 610, the second conductive element 620, the sensing unit 626, the first guard wire 630, the third guard wire 635, the pad 640, and the The edge pattern 650, the first signal transmission line 670, the second signal transmission line 680, the third signal transmission line 628, the ground line 685, and the decorative layer 690 may all be disposed on the same side of the same substrate 605. In detail, the sensing unit 626, the first guard wire 630, the third guard wire 635, the pad 640, the first signal transmission line 670, the second signal transmission line 680, the third signal transmission line 628, and the ground line 685 are all disposed on the decorative layer. The 690 was covered. The light transmission range of the touch panel 600 may correspond to a display element such as a liquid crystal display element or an organic light emitting diode display element. The substrate 605 can be a hard transparent substrate or a flexible transparent substrate, and the material thereof is, for example, glass or plastic, but is not limited thereto. In this embodiment, the substrate 605 may have a function of covering the lower element, and the side of the substrate on which the conductive element is not disposed may serve as a user interface. That is, in the embodiment, the substrate 605 may be a cover plate, which may be a composite laminate of tempered glass, poly(methyl methacrylate), PMMA, and polycarbonate (PC). UV curable resin (such as ORGA resin) or other hard light transmissive materials have protective properties such as scratch resistance and high mechanical strength. Thereby, the touch panel 600 is made thinner and lighter. Further, a side of the substrate 605 on which the conductive member is not disposed may be provided with a film layer such as an anti-glare film or an anti-reflection film.

In addition, in this embodiment, the first signal transmission line 670, the second signal transmission line 680, the third signal transmission line 628, the first guard wire 630, the third guard wire 635, the ground wire 685, and the branch 685a are respectively connected to different connections. Pad 640, and auxiliary pads 642 are also provided in a portion between the pads 640 connected to the above-mentioned lines, so that adjacent pads 640 or adjacent pads 640 and auxiliary pads 642 There is a substantially equal distance between them. That is, by the auxiliary pad 642 The arrangement can homogenize the arrangement density of the pads 640. In this way, the pressing force required for the flexible circuit board to be bonded to the pad 640 can be preferably controlled.

In summary, the touch panel of the present invention prevents a signal between the first signal transmission line and the second signal transmission line from interfering with each other by arranging a pair of first guard wires between the first signal transmission line and the second signal transmission line. And protecting the first signal transmission line and the second signal transmission line from electrostatic discharge damage. In particular, the electrostatic discharge damage of the touch panel during the manufacturing process is avoided. In addition, the touch panel of the present invention can also configure a second guard wire having a line width not less than the first guard wire between the pair of first guard wires to improve charge venting and anti-interference efficiency. Moreover, in order to avoid excessive manufacturing of the second guard wire, the second guard wire may have a plurality of slits to overcome the problem of heat accumulation effect. According to the present invention, the production yield of the touch panel can be improved.

Z2‧‧‧ peripheral line area

130‧‧‧First protective conductor

140‧‧‧ pads

170‧‧‧First signal transmission line

180‧‧‧second signal transmission line

Claims (24)

A touch panel includes a touch area and a peripheral line area outside the touch area, the touch panel includes: a plurality of first conductive elements disposed in the touch area; and a plurality of first signal transmission lines The first signal transmission line is electrically connected to the first conductive elements, and the plurality of second conductive elements are disposed in the touch area and electrically connected to the first conductive elements. The second signal transmission line is disposed at least in the peripheral circuit area, the second signal transmission lines are electrically connected to the second conductive elements, and a pair of first protection wires are disposed in the peripheral circuit area. Between two adjacent first signal transmission lines and the second signal transmission line. The touch panel of claim 1, wherein the first conductive elements respectively extend in a first direction in the touch area, and the second conductive elements respectively follow a second in the touch area The direction extends, wherein the first direction intersects the second direction. The touch panel of claim 1, wherein at least a portion of the first signal transmission lines, at least a portion of the second signal transmission lines, and at least a portion of the pair of first protection wires are disposed on the touch panel The same layer. The touch panel of claim 1, wherein a wire diameter of each of the first shielding wires is substantially equal to a wire diameter of the adjacent first signal transmission line and the second signal transmission line. The touch panel of claim 1, wherein a shortest distance between each of the first guard wires and the adjacent first signal transmission line or the second signal transmission line is not less than 15 micrometers. The touch panel of claim 1, wherein the pair of first guard wires have a pitch of not less than 15 micrometers. The touch panel of claim 1, further comprising a plurality of pads for connecting to a circuit board, wherein the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires are respectively connected to the Two of the pads, and the pair of first shielding wires are connected to a ground potential via the circuit board. The touch panel of claim 1, wherein the first conductive elements and the second conductive elements do not intersect, and the first conductive elements are disposed adjacent to the second conductive elements. The touch panel of claim 1, further comprising a plurality of pads for connecting to a circuit board, wherein the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires are adjacent to the connection The pads are gathered into one and connected to one of the pads. The touch panel of claim 1, further comprising a second protection wire disposed between the pair of first protection wires, and the wire diameter of the second protection wire is not less than each of the first protection wires The diameter of the line. The touch panel of claim 10, wherein a distance between the second guard wire and each of the first guard wires is not less than 15 micrometers. The touch panel of claim 10, which further includes multiple connections The pad is connected to a circuit board, and the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires and the second protection wire are respectively connected to three of the pads, and the pair is first The protective conductor and the second protective conductor are connected to a ground potential via the circuit board. The touch panel of claim 10, further comprising a plurality of pads for connecting to a circuit board, wherein the pads are disposed in the peripheral circuit area, wherein the pair of first protection wires and the second The protective wires are gathered together adjacent to the pads and connected to one of the pads. The touch panel of claim 10, wherein the second guard wire has a wire diameter greater than 0.4 mm. The touch panel of claim 10, wherein the second guard wire has a plurality of slits arranged in a staggered manner, the slits being parallel to an extending direction of the second guard wire. The touch panel of claim 15, wherein the slit has a length of no more than 1 mm. The touch panel of claim 1, further comprising a grounding wire and a plurality of pads, the grounding wire surrounding the peripheral circuit area, the pads being disposed in the peripheral circuit area and connected to the The circuit board has two ends, each end having at least one branch, and two ends of the ground line and the branches are respectively connected to the pads. The touch panel of claim 1, wherein the pair of first guard wires respectively have an extension portion, and the extension portions are disposed adjacent to the first Between the conductive element and the second signal transmission line or adjacent to the second conductive element and the first signal transmission line. The touch panel of claim 18, wherein the extension is a bent structure. The touch panel of claim 1, further comprising a pair of third protection lines, wherein the number of the touch areas is plural, and the touch areas are separated by the pair of third protection lines open. The touch panel of claim 20, wherein the pair of third guard lines have a pitch of not less than 15 micrometers. The touch panel of claim 20, wherein the wire diameter of each of the third guard wires is substantially equal to the wire diameter of the adjacent first signal transmission line or the second signal transmission line. The touch panel of claim 20, further comprising a second guard wire disposed between the pair of third guard wires, and the wire diameter of the second guard wire is not less than each of the third guard wires The diameter of the line. The touch panel of claim 1, further comprising a decorative layer disposed in the peripheral circuit area, wherein the first signal transmission lines, the second signal transmission lines, and the pair of first protection wires are disposed on the On the decorative layer.