TWI507940B - Touch panel and touch display panel - Google Patents

Description

Touch panel and touch display panel

The invention relates to a touch panel and a touch display panel.

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

In general, in the manufacturing process of the touch panel, when an electrostatic discharge phenomenon occurs, components in the touch panel may be destroyed, resulting in a decrease in process yield. Since the electrostatic discharge phenomenon cannot be completely avoided during the process and during use, how to make a touch panel with electrostatic protection function and quick discharge of static electricity is one of the important topics that designers are currently facing.

In order to solve the above problems, the present invention provides a touch panel comprising a patterned electrostatic protection layer having a floating potential or a ground potential to reduce the voltage caused by static electricity or to quickly discharge static electricity, so that components in the touch panel are not easily caused. Static electricity is destroyed.

One aspect of the present invention provides a touch panel including a substrate, a first conductive layer, a second conductive layer, and an insulating layer. The first conductive layer is disposed on the substrate, the first conductive layer includes at least one bridge wire and a patterned electrostatic protection layer, and the bridge wire and the patterned electrostatic protection layer are separated from each other, wherein the patterned static electricity protection layer has a floating potential or a ground potential. The second conductive layer is disposed on the first conductive layer, and the second conductive layer includes at least one first sensing series and at least two sensing pads on opposite sides of the first sensing series. The insulating layer is sandwiched between the first conductive layer and the second conductive layer. The insulating layer has at least two contact holes, and the bridge wires respectively connect the adjacent two sensing pads through the two contact holes to form a second sensing series.

According to an embodiment of the invention, the touch panel further includes a grounding wire disposed on the substrate, and the patterned electrostatic shielding layer is electrically connected to the grounding wire.

According to an embodiment of the invention, the patterned electrostatic protection layer partially overlaps at least one of the two sensing pads.

According to an embodiment of the invention, the number of the bridge wires is plural, and the patterned electrostatic protection layer comprises a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, wherein the bridge wires are located in the openings Among them.

According to an embodiment of the invention, each of the first conductive strips comprises at least two first sub-conductive strips arranged in parallel, and the two first sub-conductive strips respectively comprise a plurality of electrostatic discharge tips disposed opposite each other.

According to an embodiment of the invention, the number of bridge wires is plural, and the patterned electrostatic protection layer comprises a plurality of conductive rings, each of which surrounds one of the bridge wires.

According to an embodiment of the invention, the patterned electrostatic protection layer further comprises a third conductive strip connecting the two adjacent conductive rings.

According to an embodiment of the invention, the patterned ESD layer further includes a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, each of the conductive rings being located in one of the openings.

According to an embodiment of the invention, the patterned electrostatic protection layer further comprises one of a fourth conductive strip connecting the conductive ring, and one of the first conductive strips or the second conductive strip.

Another aspect of the present invention provides a touch display panel comprising the above touch panel and a display module. The display module is disposed above the second conductive layer of the touch panel, and the display module comprises a conductive adhesive electrically connected to the patterned electrostatic protection layer of the touch panel.

Another aspect of the present invention provides a touch panel including a substrate, a first conductive layer, a second conductive layer, and an insulating layer. The first conductive layer is disposed on the substrate, and the first conductive layer includes at least one first sensing series and at least two sensing pads are located on opposite sides of the first sensing series. The second conductive layer is disposed on the first conductive layer, the second conductive layer includes at least one bridge wire and a patterned electrostatic protection layer, and the bridge wire and the patterned electrostatic protection layer are separated from each other, wherein the patterned static protection layer may have a floating potential or ground Potential. The insulating layer is sandwiched between the first conductive layer and the second conductive layer. The insulating layer has at least two contact holes, and the bridge wires respectively connect the adjacent two sensing pads through the two contact holes to form a second sensing series.

According to an embodiment of the invention, the touch panel further includes a grounding wire disposed on the substrate, and the patterned electrostatic shielding layer is electrically connected to the grounding wire.

According to an embodiment of the invention, the patterned electrostatic protection layer partially overlaps at least one of the two sensing pads.

According to an embodiment of the invention, the number of the bridge wires is plural, and the patterned electrostatic protection layer comprises a plurality of first conductive strips and a plurality of second The conductive strips are interleaved to form a plurality of openings, each of the bridge wires being located in one of the openings.

According to an embodiment of the invention, each of the first conductive strips comprises at least two first sub-conductive strips arranged in parallel, and the two first sub-conductive strips respectively comprise a plurality of electrostatic discharge tips disposed opposite each other.

According to an embodiment of the invention, the number of bridge wires is plural, and the patterned electrostatic protection layer comprises a plurality of conductive rings, each of which surrounds one of the bridge wires.

According to an embodiment of the invention, the patterned electrostatic protection layer further comprises a third conductive strip connecting the two adjacent conductive rings.

According to an embodiment of the invention, the patterned ESD layer further includes a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, each of the conductive rings being located in one of the openings.

According to an embodiment of the invention, the patterned electrostatic protection layer further comprises one of a fourth conductive strip connecting the conductive ring, and one of the first conductive strips or the second conductive strip.

Another aspect of the present invention provides a touch display panel comprising the above touch panel and a display module. The display module is disposed above the second conductive layer of the touch panel, and the display module comprises a conductive adhesive electrically connected to the patterned electrostatic protection layer of the touch panel.

Lines 1B-1B', 2B-2B', 3B-3B', 4B-4B', 5B-5B'‧‧

9B-9B', 10B-10B', 11B-11B', 12B-12B', 13B-13B'‧‧‧ segments

10, 20‧‧‧ touch display panel

100,200‧‧‧ touch panel

110, 210‧‧‧ substrate

120, 220‧‧‧ first conductive layer

122, 242‧‧‧ Bridge wiring

124, 244‧‧‧ patterned electrostatic protection layer

124a, 240a‧‧‧ openings

1241, 2441‧‧‧ first conductive strip

1241a‧‧‧first sub-conductive strip

1242, 2442‧‧‧ second conductive strip

1242a‧‧‧Second sub-conductive strip

1243‧‧‧ Conductive ring

1244‧‧‧3rd conductive strip

1245‧‧‧4th conductive strip

130, 230‧‧‧ insulation

130a, 230a‧‧‧ contact holes

140, 240‧‧‧Second conductive layer

142, 222‧‧‧ first sensing series

1422, 2222‧‧‧ First sense series bridge wiring

1424, 2224‧‧‧First sensing tandem sensing pads

144, 224‧‧‧ Sense pads

146, 226‧‧‧Second sensing series

150, 250‧‧‧ grounding wire

160, 260‧ ‧ protective layer

160a, 230a, 260a‧‧

300‧‧‧ display module

310‧‧‧ Conductive tape

D1‧‧‧ first direction

D2‧‧‧ second direction

T‧‧‧ Electrostatic discharge tip

1A is a top plan view showing a first conductive layer in accordance with a first embodiment of the present invention.

Fig. 1B is a schematic cross-sectional view taken along line 1B-1B' of Fig. 1A.

2A is a top plan view showing an insulating layer in accordance with a first embodiment of the present invention.

Fig. 2B is a schematic cross-sectional view taken along line 2B-2B' of Fig. 2A.

3A is a top plan view showing a second conductive layer in accordance with a first embodiment of the present invention.

Fig. 3B is a schematic cross-sectional view taken along line 3B-3B' of Fig. 3A.

FIG. 4A is a top view showing a grounding manner of a patterned electrostatic protection layer according to an embodiment of the invention.

Fig. 4B is a schematic cross-sectional view taken along line 4B-4B' of Fig. 4A.

FIG. 5A is a top view showing a grounding manner of a patterned electrostatic protection layer according to another embodiment of the present invention.

Fig. 5B is a schematic cross-sectional view taken along line 5B-5B' of Fig. 5A.

Figure 6 is a top plan view showing a patterned electrostatic protection layer in accordance with another embodiment of the present invention.

Figure 7 is a top plan view showing a patterned electrostatic protection layer in accordance with another embodiment of the present invention.

Figure 8 is a top plan view showing a patterned electrostatic protection layer in accordance with another embodiment of the present invention.

Figure 9A is a top plan view showing a first conductive layer in accordance with a second embodiment of the present invention.

Fig. 9B is a schematic cross-sectional view taken along line 9B-9B' of Fig. 9A.

Figure 10A is a top plan view showing an insulating layer in accordance with a second embodiment of the present invention.

Fig. 10B is a schematic cross-sectional view showing the line segment 10B-10B' taken along line 10A.

11A is a second conductive diagram showing a second embodiment of the present invention. A top view of the layer.

Fig. 11B is a schematic cross-sectional view showing the line segment 11B-11B' taken along line 11A.

FIG. 12A is a top view showing a grounding manner of a patterned electrostatic protection layer according to an embodiment of the invention.

Fig. 12B is a schematic cross-sectional view showing the line segment 12B-12B' taken along line 12A.

FIG. 13A is a top view showing a grounding manner of a patterned electrostatic protection layer according to another embodiment of the present invention.

Fig. 13B is a schematic cross-sectional view showing the line segment 13B-13B' along the 13A.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

First embodiment

A first embodiment of the present invention provides a touch panel including a substrate, a first conductive layer, an insulating layer, and a second conductive layer.

FIG. 1A is a schematic top view showing the first conductive layer 120 of the present embodiment. Fig. 1B is a schematic cross-sectional view taken along line 1B-1B' of Fig. 1A. The first conductive layer 120 is disposed on the substrate 110. The substrate 110 can be a glass substrate, a quartz substrate, or a plastic substrate. The first conductive layer 120 can be transparent Made of conductive material or metal. The transparent conductive material is, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnOx), indium gallium zinc oxide (IGZO), gallium zinc oxide (GZO), or a combination thereof. The metal is, for example, molybdenum (Mo), chromium (Cr), niobium (Nd), titanium (Ti), copper (Cu), silver (Ag), gold (Au), zinc (Zn), indium (In), gallium ( Ga), a combination or alloy as described above.

The first conductive layer 120 includes a bridge wire 122 and a patterned electrostatic protection layer 124. The bridge wire 122 and the patterned static electricity protection layer 124 are separated from each other without contact. In general, the first conductive layer 120 can include a plurality of bridge lines 122 and a patterned electrostatic protection layer 124. The patterned electrostatic protection layer 124 may be, for example, a mesh pattern, but is not limited thereto. In detail, the patterned electrostatic protection layer 124 includes a plurality of first conductive strips 1241 and a plurality of second conductive strips 1242 interleaved to form a plurality of openings 124a, and each of the bridge wires 122 is located in one of the plurality of openings 124a. in.

It should be noted that in the subsequent step, the insulating layer and the second conductive layer are sequentially formed on the first conductive layer 120, so that the patterned electrostatic protection layer 124, the insulating layer and the second conductive layer can form a capacitor structure. The capacitor structure helps to reduce the voltage caused by the electrostatic discharge, making it difficult to reach the breakdown voltage value, so that the electrostatic discharge can be prevented from damaging the components in the touch panel. This principle will be described in detail below. In a practical application, the arrangement of the bridge wire 122 and the patterned electrostatic protection layer 124 can be appropriately changed, so that the patterned electrostatic protection layer 124, the insulating layer and the second conductive layer form a capacitor structure, so the configuration manner is It is not limited to the example shown in Fig. 1.

FIG. 2A is a schematic top view showing the insulating layer 130 of the present embodiment. Fig. 2B is a schematic cross-sectional view taken along line 2B-2B' of Fig. 2A. The material of the insulating layer 130 may be an inorganic insulating material such as cerium oxide, cerium nitride, cerium oxynitride or other suitable materials. The insulating layer 130 has at least two Contact holes 130a, each of which exposes a portion of the bridge wires 122. In general, the insulating layer 130 may have a plurality of contact holes 130a, and four contact holes 130a may be disposed on each of the bridge wires 122. However, the insulating layer 130 is used to expose a portion of the bridge wires 122 and electrically insulate between the patterned electrostatic protection layer 124 and the subsequently formed second conductive layer. Therefore, in practical applications, the arrangement of the insulating layer 130 can be performed. Appropriate changes are not limited to the example of Figure 2A.

FIG. 3A is a schematic top view showing the second conductive layer 140 of the present embodiment. Fig. 3B is a schematic cross-sectional view taken along line 3B-3B' of Fig. 3A. The second conductive layer 140 is disposed on the first conductive layer 120 , and the insulating layer 130 is disposed between the first conductive layer 120 and the second conductive layer 140 ; that is, the second conductive layer 140 is disposed on the insulating layer 130 . The second conductive layer 140 may be made of a transparent conductive material, which may refer to the materials exemplified in the embodiment of the first conductive layer 120. The second conductive layer 140 includes a first sensing series 142 and at least two sensing pads 144. The first sensing series 142 includes at least one bridge wire 1422 and a plurality of sensing pads 1424. The bridge wire 1422 is connected in series with two adjacent sensing pads 1424 to form a first sensing series 142. Two sensing pads 144 are respectively located on opposite sides of the first sensing series 142. As shown in FIG. 3B, the bridge wires 122 are respectively connected to the adjacent two sensing pads 144 through the two contact holes 130a to form the second sensing series 146 shown in FIG. 3A.

In general, the second conductive layer 140 may include a plurality of first sensing series 142 and a plurality of sensing pads 144 that are separated from each other. The sensing pads 1424 and the sensing pads 144 of the first sensing series 142 are offset from each other without overlapping. The shape of the sensing pad 1424 and the sensing pad 144 may be a diamond shape, a square shape, or other shapes that can be regularly arranged. Each of the bridge wires 122 is connected in series with two adjacent sensing pads 144 to form a plurality of second sensing series 146. Therefore, as shown in FIG. 3A, the plurality of first sensing series 142 and the plurality of second sensing series 146 are respectively facing first The direction D1 and the second direction D2 extend and are interlaced to form an array of touch patterns.

It is noted that the patterned electrostatic protection layer 124 overlaps at least a portion of one of the two sensing pads 144, as shown in Figures 3A-3B. In other words, the patterned electrostatic protection layer 124, the insulating layer 130, and the sensing pad 144 are stacked in the thickness direction to form a capacitor structure. The capacitor structure helps to reduce the voltage caused by the electrostatic discharge, making it difficult to reach the breakdown voltage value, and avoiding electrostatic damage to components in the touch panel 100. This principle is described in detail below. In general, when the touch panel includes only the first sensing series 142, the insulating layer 130, and the second sensing series 146, and does not include the patterned electrostatic protection layer 124, when an electrostatic discharge phenomenon occurs, The voltage to which the component is subjected can be calculated from the following equation (1): V1=Q/C1.............................. ..................................Formula 1)

Wherein, V1 is the voltage that the component is subjected to, Q is the external charge, and C1 is the capacitance value of the first sensing series 142, the insulating layer 130, and the second sensing series 146. In the present embodiment, the voltage that the component is subjected to can be calculated by the following formula (2): V2=Q/(C1+C2).................... ....................................(2)

Wherein, V2 is the voltage that the component is subjected to, Q is the external charge, C1 is the capacitance value between the first sensing series 142, the insulating layer 130 and the second sensing series 146, and C2 is the patterned electrostatic protection layer 124. The capacitance value formed by the insulating layer 130 and the sensing pad 144. Therefore, when the external charge value (ie, the Q value) is the same, the voltage V2 is lower than the voltage V1, and the breakdown voltage value is less likely to be reached, so that the components in the touch panel 100 can be effectively prevented from being damaged by static electricity.

In order to understand the effect of the patterned electrostatic protection layer 124, the inventors separately tested the touch panel and the touch surface that did not include the patterned electrostatic protection layer 124. The breakdown voltage value of the board 100. The touch panel not including the patterned electrostatic protection layer 124 includes only the first sensing series 142, the insulating layer 130, and the second sensing series 146. The breakdown voltage of the touch panel is 2.5 kV. The touch panel 100 includes a patterned electrostatic protection layer 124, an insulating layer 130, a first sensing series 142, and a second sensing series 146. The breakdown voltage of the touch panel 100 is 6.0 kV. Therefore, the present embodiment can effectively improve the electrostatic protection capability of the touch panel.

The patterned electrostatic protection layer 124 can have a floating potential or a grounded current Bit. When the patterned electrostatic protection layer 124 is not electrically connected to other components, it has a floating potential. In the embodiment in which the patterned electrostatic protection layer 124 has a ground potential, the patterned electrostatic protection layer 124 can quickly discharge static electricity to prevent static electricity from accumulating in any components of the touch panel 100, so that the static electricity can be prevented from damaging the touch panel. The components in 100. Therefore, several embodiments in which the patterned electrostatic protection layer 124 has a ground potential will be exemplified below. 4A is a top plan view showing the grounding manner of the patterned electrostatic protection layer 124 in accordance with an embodiment of the present invention. Fig. 4B is a schematic cross-sectional view taken along line 4B-4B' of Fig. 4A. The substrate 110 of the touch panel 100 has a sensing area R1 and a peripheral area R2. The ground line 150 may be formed on the peripheral region R2 of the substrate 110, which may be made of metal. The ground line 150 can directly contact the surface of the substrate 110. After the ground line 150 is formed, the first conductive layer 120, the insulating layer (not shown), the second conductive layer (not shown), and the protective layer 160 may be sequentially formed. The first conductive layer 120 includes a bridge wire 122 and a patterned electrostatic protection layer 124. The first conductive layer 120 is mainly formed in the sensing region R1 of the substrate 110. However, the first conductive layer 120 further includes a protrusion 126 extending from the sensing region R1 of the substrate 110 to the peripheral region R2 to be electrically connected to the ground line 150. As shown in FIG. 4B, the protruding portion 126 can directly contact the grounding wire 150 to make the patterned electrostatic protection layer 124 electrically. Connect the ground wire 150. Additionally, the protective layer 160 may cover the protrusions 126. The protective layer 160 is an insulating material and may be made of the same or different material as the insulating layer 130 described above.

FIG. 5A is a top view showing the grounding manner of the patterned electrostatic protection layer 124 according to another embodiment of the present invention. Fig. 5B is a schematic cross-sectional view taken along line 5B-5B' of Fig. 5A. The touch display panel 10 includes a touch panel 100 and a display module 300. The touch panel 100 shown in FIG. 5A can be similar to the touch panel 100 shown in FIG. 4A. After the ground line 150 is formed, the first conductive layer 120, the insulating layer (not shown), the second conductive layer 140, and the protective layer 160 may be sequentially formed. The first conductive layer 120 may further include a protrusion 126 extending from the sensing region R1 of the substrate 110 to the peripheral region R2. The protective layer 160 has a protrusion 126 whose opening 160a exposes a portion, as shown in FIG. 5B. The display module 300 is disposed above the second conductive layer 140 of the touch panel 100. The display module 300 includes a conductive adhesive tape 310 attached to the edge of the display module 300 and the peripheral region R2 of the display panel 100. In detail, the conductive adhesive tape 310 can be attached to the opening 160a of the protective layer 160 to electrically connect the patterned electrostatic protection layer 124 of the touch panel 100 to contact the protruding portion 126, so that the patterned electrostatic protection layer 124 has a ground potential. . Therefore, if static electricity is generated during or during the process, the static electricity can be quickly conducted to the conductive adhesive tape 310 through the patterned electrostatic protection layer 124 to prevent static electricity from accumulating in the components of the touch panel 100.

Variational embodiments of the patterned electrostatic protection layer are provided below. In a real In the embodiment, as shown in FIG. 6, the patterned electrostatic protection layer 124 has a plurality of first conductive strips 1241 and a plurality of second conductive strips 1242. Each of the first conductive strips 1241 includes at least two first sub-conductive strips 1241a arranged in parallel, and the two first sub-conductive strips 1241a further comprise a plurality of electrostatic discharge tips T respectively. Set. The shape of the electrostatic discharge tip T may be an isosceles triangle, or a right triangle or other geometric shape capable of causing an increase in local electric field strength. As a result, when static electricity is concentrated on the electrostatic discharge tip T of the first sub-conductive strip 1241a, it is easily conducted to the electrostatic discharge tip T of the adjacent first sub-conductive strip 1241a, thereby preventing electrostatic damage to the element. On the other hand, each of the second conductive strips 1242 may also include at least two second sub-conductive strips 1242a arranged in parallel. The two second sub-conductive strips 1242a may further comprise a plurality of electrostatic discharge tips T, respectively, to achieve the same The above electrostatic protection effect.

In another embodiment, as shown in FIG. 7, the electrostatic protection layer 124 is patterned with dots. The patterned electrostatic protection layer 124 includes a plurality of conductive rings 1243, each of which surrounds one of the bridge wires 122. The patterned electrostatic protection layer 124 further includes a third conductive strip 1244 connecting the two adjacent conductive rings 1243. The conductive ring 1243 and the third conductive strip 1244 can quickly direct static electricity to other locations, and can avoid electrostatic damage to the components.

In still another embodiment, as shown in FIG. 8, the pattern is marked with dots Electrostatic protection layer 124. The patterned electrostatic protection layer 124 includes a plurality of first conductive strips 1241, a plurality of second conductive strips 1242 and at least one fourth conductive strip 1245 in addition to the plurality of conductive rings 1243. The plurality of first conductive strips 1241 and the plurality of second conductive strips 1242 are interdigitated to form a plurality of openings 124a, and each of the conductive rings 1243 is located in one of the openings 124a. The fourth conductive strip 1245 is connected to one of the conductive rings 1243 and one of the first conductive strips 1241 or the second conductive strip 1242. Since the conductive ring 1243, the first conductive strip 1241, the second conductive strip 1242, and the fourth conductive strip 1245 can quickly conduct static electricity to other locations, electrostatic damage can be avoided. In addition, since the patterned electrostatic protection layer 124 is fabricated with the bridge wire 122, the manufacturing cost can be reduced without requiring an additional process.

Second embodiment

A second embodiment of the present invention provides a touch panel including a substrate, a first conductive layer, an insulating layer, and a second conductive layer.

FIG. 9A is a top view showing the first conductive layer 220 of the embodiment. Fig. 9B is a schematic cross-sectional view taken along line 9B-9B' of Fig. 9A. The first conductive layer 220 is disposed on the substrate 210. The first conductive layer 220 includes a first sensing series 222 and at least two sensing pads 224. The first sensing series 222 includes at least one bridge wire 2222 and a plurality of sensing pads 2224. The bridge wire 2222 is connected in series with two adjacent sensing pads 2224 to form a first sensing series 222. Two sensing pads 224 are respectively located on opposite sides of the first sensing series 222. In general, the first conductive layer 220 can include a plurality of first sensing series 222 and a plurality of sensing pads 224 that are separated from each other. The sensing pads 2224 and the sensing pads 224 of the first sensing series 222 are staggered from each other without overlapping.

FIG. 10A is a schematic top view showing the insulating layer 230 of the present embodiment. Fig. 10B is a schematic cross-sectional view showing the line segment 10B-10B' taken along line 10A. The insulating layer 230 has at least two contact holes 230a, each of which exposes a portion of the sensing pad 224. In general, the insulating layer 230 may have a plurality of contact holes 230a. At least two contact holes 230a are provided on each of the sensing pads 224. The insulating layer 230 is used to expose a portion of each of the sensing pads 224 and electrically insulate the first conductive layer 220 shown in FIG. 9A from the subsequently formed patterned electrostatic protection layer. Therefore, in practical applications, The arrangement of the insulating layer 230 can be appropriately changed without being limited to the example of FIG. 10A.

FIG. 11A is a schematic top view showing the second conductive layer 240 of the present embodiment. Figure 11B shows the line segment 11B-11B' along the 11A Schematic diagram of the section. The second conductive layer 240 is disposed on the first conductive layer 220 , and the insulating layer 230 is disposed between the first conductive layer 220 and the second conductive layer 240 ; that is, the second conductive layer 240 is disposed on the insulating layer 230 . The second conductive layer 240 includes the bridge wires 242 and the patterned electrostatic protection layer 244 separated from each other without contact. In general, the second conductive layer 240 can include a plurality of bridge wires 242 and a mesh patterned electrostatic protection layer 244. Each of the bridge wires 242 is connected in series with two adjacent sensing pads 224 to form a plurality of second sensing series 226. Therefore, as shown in FIG. 11A, the plurality of first sensing series 222 and the plurality of second sensing series 226 respectively extend in the first direction D1 and the second direction D2 to be interlaced to form a touch pattern. Array. The patterned electrostatic protection layer 244 includes a plurality of first conductive strips 2441 and a plurality of second conductive strips 2442 interdigitated to form a plurality of openings 244a. Each bridge wire 242 is located in one of the plurality of openings 244a.

It should be noted that, as shown in FIGS. 11A-11B, the patterned electrostatic protection layer 244 overlaps at least a portion of one of the two sensing pads 224, so the sensing pad 224, the insulating layer 230, and the patterned electrostatic protection Layer 244 can form a capacitive structure. The capacitor structure helps to reduce the voltage caused by the electrostatic discharge, making it difficult to reach the breakdown voltage value, and avoiding electrostatic damage to components in the touch panel 200. Since the principle is the same as that described in the first embodiment, it will not be described here.

The patterned electrostatic protection layer 244 can have a floating potential or a ground potential. When the patterned electrostatic protection layer 244 is not electrically connected to other components, it has a floating potential. In the embodiment in which the patterned electrostatic protection layer 244 has a ground potential, the patterned electrostatic protection layer 244 can quickly discharge static electricity to prevent static electricity from accumulating in any component of the touch panel 200, so that the static electricity can be prevented from damaging the touch panel. The components in 200. Several embodiments in which the patterned electrostatic protection layer 244 has a ground potential will be exemplified below. Figure 12A is shown in accordance with this A top view of the grounding pattern of the patterned electrostatic protection layer 244 in one embodiment of the invention. Fig. 12B is a schematic cross-sectional view showing the line segment 12B-12B' taken along line 12A. The substrate 210 of the touch panel 200 has a sensing area R1 and a peripheral area R2. The ground line 250 may be formed on the peripheral region R2 of the substrate 210, which may be made of metal. The ground line 250 can directly contact the surface of the substrate 210. After the ground line 250 is formed, a first conductive layer (not shown), an insulating layer 230, a second conductive layer 240, and a protective layer 260 may be sequentially formed. The second conductive layer 240 includes a bridge wire 242 and a patterned electrostatic protection layer 244. The second conductive layer 240 is mainly formed in the sensing region R1 of the substrate 210. However, the second conductive layer 240 may further include a protrusion 246 extending from the sensing region R1 of the substrate 210 to the peripheral region R2 to be electrically connected to the ground line 250. As shown in FIG. 12B, the insulating layer 230 has an opening 230a. The protruding portion 246 is connected to the grounding wire 250 through the opening 230a, so that the patterned electrostatic protection layer 244 is electrically connected to the grounding wire 250. Additionally, the protective layer 260 can cover the protrusions 246. The protective layer 260 is an insulating material and may be made of the same or different material as the insulating layer 230 described above. In addition, since the patterned electrostatic protection layer 224 is fabricated with the bridge wire 2222, the manufacturing cost can be reduced, and no additional process is required.

Figure 13A is a diagram showing patterning in accordance with another embodiment of the present invention. A top view of the grounding of the ESD layer 244. Fig. 13B is a schematic cross-sectional view showing the line segment 13B-13B' along the 13A. The touch display panel 20 includes a touch panel 200 and a display module 300. The touch panel 200 shown in FIG. 13A is similar to the touch panel 200 shown in FIG. 12A. After the ground line 250 is formed, the first conductive layer 220, the insulating layer (not shown), the second conductive layer 240, and the protective layer 260 may be sequentially formed. The second conductive layer 240 may further include a protrusion 246 extending from the sensing region R1 of the substrate 210 to the peripheral region R2. The protective layer 260 has an opening 260a exposing a portion of the protrusion 246, such as Figure 13B shows. The display module 300 is disposed above the second conductive layer 240 of the touch panel 200. The display module 300 includes a conductive adhesive tape 310 attached to the edge of the display module 300 and the peripheral region R2 of the display panel 200. In detail, the conductive adhesive tape 310 can be attached to the opening 260a of the protective layer 260 to electrically connect the patterned electrostatic protection layer 244 of the touch panel 200 to contact the protruding portion 246, so that the patterned electrostatic protection layer 244 has a ground potential. . Therefore, if static electricity is generated during or during the process, static electricity can be quickly conducted to the conductive blanket 310 through the patterned electrostatic protection layer 244 to prevent static electricity from accumulating in the components of the touch panel 200.

In summary, the touch panel of several embodiments of the present invention includes The patterned electrostatic protection layer can form a capacitor structure with the insulating layer and another layer of the sensing pad conductive layer to reduce the voltage caused by static electricity, making it difficult to reach the breakdown voltage value. In addition, the patterned electrostatic protection layer can have a ground potential to quickly discharge the static electricity to prevent static electricity from accumulating in the components of the touch panel, thereby preventing static electricity from damaging components in the touch panel.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

3B-3B’‧‧‧ Segment

100‧‧‧ touch panel

120‧‧‧First conductive layer

122‧‧‧Bridge wiring

124‧‧‧ patterned electrostatic protection layer

140‧‧‧Second conductive layer

142‧‧‧First sensing series

1422‧‧‧First sensing tandem sensing pad

1424‧‧‧The first sensed bridge wiring

144‧‧‧Sense pad

146‧‧‧Second sensing series

D1‧‧‧ first direction

D2‧‧‧ second direction

Claims (20)

A touch panel includes: a substrate; a first conductive layer disposed on the substrate, the first conductive layer comprising at least one bridge wire and a patterned electrostatic protection layer, the bridge wire and the patterned electrostatic protection layer are mutually Separating, wherein the patterned electrostatic protection layer has a floating potential or a ground potential: a second conductive layer is disposed on the first conductive layer, the second conductive layer includes at least one first sensing series and at least two The sensing pads are located on opposite sides of the first sensing series; and an insulating layer is sandwiched between the first conductive layer and the second conductive layer; wherein the insulating layer has at least two contact holes The bridge wire connects the adjacent two sensing pads through the two contact holes to form a second sensing series. The touch panel of claim 1, wherein the touch panel further comprises a grounding wire disposed on the substrate, the patterned electrostatic protection layer electrically connecting the grounding wire. The touch panel of claim 1, wherein the patterned electrostatic protection layer partially overlaps at least one of the two sensing pads. The touch panel of claim 1, wherein the number of the bridge wires is plural, the patterned electrostatic protection layer comprises a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, each of which The bridge wire is located in one of the openings. The touch panel of claim 4, wherein each of the first conductive strips comprises at least two first sub-conductive strips arranged in parallel, and the two first sub-conductive strips respectively comprise a plurality of electrostatic discharge tips disposed opposite each other. The touch panel of claim 1, wherein the number of the bridge wires is plural, and the patterned electrostatic protection layer comprises a plurality of conductive rings, each of the conductive rings surrounding one of the bridge wires. The touch panel of claim 6, wherein the patterned electrostatic protection layer further comprises a third conductive strip connecting the two adjacent conductive rings. The touch panel of claim 6, wherein the patterned electrostatic protection layer further comprises a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, each of the conductive rings being located at the openings Among them. The touch panel of claim 8, wherein the patterned electrostatic protection layer further comprises a fourth conductive strip connecting one of the conductive rings, and connecting one of the first conductive strips or the One of the second conductive strips. A touch display panel, comprising: the touch panel according to any one of claims 1-9; A display module is disposed above the second conductive layer of the touch panel, and the display module includes a conductive adhesive tape electrically connecting the patterned electrostatic protection layer of the touch panel. A touch panel includes: a substrate; a first conductive layer disposed on the substrate, the first conductive layer includes at least one first sensing series and at least two sensing pads are located on the first sensing string The opposite sides of the column: a second conductive layer disposed on the first conductive layer, the second conductive layer comprising at least one bridge wire and a patterned electrostatic protection layer, the bridge wire and the patterned electrostatic protection layer are separated from each other Wherein the patterned electrostatic protection layer has a floating potential or a ground potential; and an insulating layer interposed between the first conductive layer and the second conductive layer; wherein the insulating layer has at least two contact holes The bridge wire connects the adjacent two sensing pads through the two contact holes to form a second sensing series. The touch panel of claim 11, wherein the touch panel further comprises a grounding wire disposed on the substrate, the patterned electrostatic protection layer electrically connecting the grounding wire. The touch panel of claim 11, wherein the patterned electrostatic protection layer partially overlaps at least one of the two sensing pads. The touch panel of claim 11, wherein the number of the bridge wires is plural, the patterned electrostatic protection layer comprises a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, each of which The bridge wire is located in one of the openings. The touch panel of claim 14, wherein each of the first conductive strips comprises at least two first sub-conductive strips arranged in parallel, and the two first sub-conductive strips respectively comprise a plurality of electrostatic discharge tips disposed opposite each other. The touch panel of claim 11, wherein the number of the bridge wires is plural, and the patterned electrostatic protection layer comprises a plurality of conductive rings, each of the conductive rings surrounding one of the bridge wires. The touch panel of claim 16, wherein the patterned electrostatic protection layer further comprises a third conductive strip connecting the two adjacent conductive rings. The touch panel of claim 16, wherein the patterned electrostatic protection layer further comprises a plurality of first conductive strips and a plurality of second conductive strips interdigitated to form a plurality of openings, each of the conductive rings being located at the openings Among them. The touch panel of claim 18, wherein the patterned electrostatic protection layer further comprises a fourth conductive strip connecting one of the conductive rings, and connecting one of the first conductive strips or the ones One of the second conductive strips. A touch display panel, comprising: the touch panel of any one of claims 11-19; and a display module disposed above the second conductive layer of the touch panel, the display module includes A conductive adhesive tape electrically connects the patterned electrostatic protection layer of the touch panel.