CN104156127A - Touch panel - Google Patents

Abstract

The present invention provides a touch panel, which includes a substrate, a plurality of first sensing series and a plurality of second sensing series. The first sensing series are arranged on the substrate. Each first sensing series extends along a first direction and includes a plurality of first sensing pads and a plurality of bridge structures. Each bridge structure connects two adjacent first sensing pads in series along the first direction, wherein each bridge structure includes a conductive pattern and an optical matching pattern, and the optical matching pattern is arranged on the surface of the conductive pattern facing the user to reduce the reflectivity of light in the viewing direction in the area where the bridge structure is located.

Description

touch panel

technical field

The present invention relates to a touch panel, and in particular to a touch panel capable of reducing the reflectivity of a bridging structure.

Background technique

With the rapid development and application of information technology, wireless mobile communication and information home appliances, many information products have changed from traditional keyboard or mouse input devices to touch control panel as an input device.

Generally speaking, touch panels can be mainly classified into resistive touch panels and capacitive touch panels. Taking the capacitive touch panel as an example, the existing capacitive touch panel includes a substrate and a plurality of first sensing series, a plurality of second sensing series and a plurality of insulating patterns arranged on the substrate, wherein these The first sensing series and the second sensing series respectively extend along different directions and intersect with each other, and are electrically insulated from each other by an insulating pattern disposed at the intersection of the two.

Usually, the first sensing series and the second sensing series are composed of a plurality of sensing pads and connecting parts. The material used is usually a transparent conductive material with good light transmittance. In addition, since the connecting parts of the first sensing series and the connecting parts of the second sensing series are interlaced, the connecting part of the first sensing series and one of the second sensing series needs to be Made of a different material than the sensing pad. At this time, such a connection portion is formed by a metal bridge with good electrical conductivity, and the metal bridge spans the insulating pattern and electrically connects the sensing pads at opposite ends of the metal bridge. However, since the reflectivity of the metal bridge is much higher than the reflectivity of the sensing pads made of transparent conductive material in the first sensing series and the second sensing series (the reflectivity of the metal bridge usually exceeds 50%), The visual effect of the touch panel is affected.

Contents of the invention

The invention provides a touch panel with good visual effect.

A touch panel of the present invention includes a substrate, a plurality of first sensing series and a plurality of second sensing series. The first sensing series are configured on the substrate. Each first sensing series extends along a first direction. Each first sensing series includes a plurality of first sensing pads and a plurality of bridge structures. Each bridging structure connects two adjacent first sensing pads in series along the first direction, wherein each bridging structure includes a conductive pattern and an optical matching pattern, and the optical matching pattern is located on the surface of the conductive pattern facing the user to reduce the viewing direction. The reflectivity of the upper light in the area where the bridge structure is located. These second sensing series are electrically insulated from these first sensing series, and these second sensing series are arranged on the substrate, and each second sensing series extends along a second direction, wherein the first direction is the same as that of the first sensing series. The second direction intersects. Each second sensing series includes a plurality of second sensing pads and a plurality of connecting parts, and each connecting part connects two adjacent second sensing pads in series along the second direction.

In an embodiment of the present invention, the above-mentioned touch panel further includes an insulating layer, and the insulating layer is disposed between the first sensing series and the second sensing series.

In an embodiment of the present invention, the above-mentioned optical matching pattern is located between the conductive pattern and the substrate.

In an embodiment of the present invention, the refractive index of the optical matching pattern falls within a range of 1.5 to 2.5, and the extinction coefficient of the optical matching pattern falls within a range of 0.5 to 2.5.

In an embodiment of the present invention, the film thickness of the optical matching pattern of each bridge structure mentioned above is greater than and less than

In an embodiment of the present invention, the above-mentioned touch panel further includes an insulating layer between the first sensing series and the second sensing series. The bridging structures, the first sensing pads, and the second sensing pads are coplanarly arranged on the substrate, and the bridging structures are located between the insulating layer and the substrate, so that each connecting portion straddles the corresponding bridging structures for electrical connection. Connecting two adjacent second sensing pads.

In an embodiment of the present invention, the above-mentioned touch panel further includes a matting layer, and the first sensing series and the second sensing series are located between the matting layer and the substrate.

In an embodiment of the present invention, the above-mentioned touch panel further includes an insulating layer between the first sensing series and the second sensing series. The connecting parts, the first sensing pads, and the second sensing pads are coplanarly arranged on the substrate, and the connecting parts are between the insulating layer and the substrate, so that each bridging structure straddles the corresponding connecting parts for electrical connection. Two adjacent first sensing pads.

In an embodiment of the present invention, the above-mentioned touch panel further includes a matting layer covering the substrate, and the matting layer is located between the substrate and the first sensing series and between the substrate and the second sensing series between.

In an embodiment of the present invention, the sidewalls of the conductive patterns and the sidewalls of the optical matching patterns of the above-mentioned bridge structures are aligned.

In an embodiment of the present invention, the sidewalls of the optical matching patterns of the above bridge structures are covered by conductive patterns.

In an embodiment of the present invention, each of the above bridge structures further includes a protection pattern disposed on the conductive pattern, and the conductive pattern is located between the protection pattern and the optical matching pattern.

In an embodiment of the present invention, the reflectance of the above-mentioned light in the region where the bridge structure is located is less than 20%.

In an embodiment of the present invention, the reflectance of the above-mentioned light in the region where the bridge structure is located is less than 10%.

In an embodiment of the present invention, the material of the conductive patterns of the above-mentioned bridge structures includes gold, silver, copper, aluminum, chromium, platinum, rhodium, molybdenum, titanium, nickel, indium, tin or alloys thereof, or the above metals At least one of nitride, oxide, and oxynitride, or a stacked layer of at least two of the above conductive patterns.

In an embodiment of the present invention, the material of the optical matching pattern of each bridge structure mentioned above includes the same material as that of the conductive pattern.

In an embodiment of the present invention, the material of the optical matching pattern of each bridge structure mentioned above is oxide, nitride or oxynitride of the material of the conductive pattern.

In an embodiment of the present invention, the film thickness of the optical matching pattern of each bridge structure mentioned above is less than

In an embodiment of the present invention, each of the above-mentioned first sensing pads is located between the optical matching patterns of each bridge structure and the substrate.

In an embodiment of the present invention, the sidewalls of the above bridge structures are covered and contacted by the corresponding first sensing pads.

In an embodiment of the present invention, the film thickness of the conductive patterns of the above-mentioned bridge structures is greater than

In an embodiment of the present invention, the light transmittance of the optical matching patterns of the above-mentioned bridge structures is greater than the light transmittance of the conductive patterns.

In an embodiment of the present invention, the materials of the above-mentioned first sensing pad and the second sensing series include indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide object, grid-shaped metal, or a stacked layer of at least two of the above.

In an embodiment of the present invention, the above-mentioned first sensing pads and the second sensing series respectively include a grid-shaped metal layer and an optical matching layer, and the optical matching layer is located on the grid-shaped metal layer facing the user. on the surface.

In an embodiment of the present invention, the above-mentioned substrate has a touch area and a surrounding area located on at least one side of the touch area, and the touch panel further includes a decoration layer, wherein the decoration layer is located in the surrounding area.

In an embodiment of the present invention, the above-mentioned decoration layer is located on the same side of the substrate as the first sensing series and the second sensing series.

In an embodiment of the present invention, the above-mentioned decoration layer is located on a side of the substrate opposite to the first sensing series and the second sensing series.

Based on the above, the touch panel of the present invention uses the conductive pattern and the optical matching pattern to realize the bridge structure of the sensing series, and by setting the optical matching pattern on the surface of the conductive pattern facing the user, the light in the viewing direction is reduced. The reflectivity of the area where the structure is located. In this way, the touch panel can have a good visual effect, that is, the user is not easy to perceive the outline of the bridging structure.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a schematic partial top view of a touch panel according to the first embodiment of the present invention;

Fig. 2A and Fig. 2B are respectively the cross-sectional schematic diagrams of section line A-A' and section line B-B' in Fig. 1;

3A and 3B are schematic cross-sectional views of a touch panel according to a second embodiment of the present invention;

FIG. 4 is a schematic partial top view of a touch panel according to a third embodiment of the present invention;

Fig. 5A and Fig. 5B are respectively the cross-sectional schematic diagrams of section line C-C' and section line D-D' in Fig. 4;

6A and 6B are schematic cross-sectional views of a touch panel according to a fourth embodiment of the present invention;

7A and 7B are schematic cross-sectional views of a touch panel according to a fifth embodiment of the present invention;

FIG. 8 is a schematic partial top view of a touch panel according to a sixth embodiment of the present invention.

Explanation of reference signs:

100, 400, 800: touch panel;

110, 810: substrate;

120, 420, 820: the first sensing series;

122, 422: the first sensing pad;

124, 424: bridge structure;

124a, 424a: conductive patterns;

124b, 424b: optical matching pattern;

124c, 424c: protection patterns;

130, 430, 830: the second sensing series;

132, 432: the second sensing pad;

134, 434: connection part;

140, 440, 840: insulating layer;

150, 450: matting layer;

850: decoration layer;

D1: first direction;

D2: second direction;

G: Gap;

Ha, Hb, Hc: film thickness;

L: light;

A1: touch area;

A2: Surrounding area;

A-A', B-B', C-C', D-D': broken lines.

Detailed ways

FIG. 1 is a schematic partial top view of a touch panel according to a first embodiment of the present invention. 2A and FIG. 2B are schematic cross-sectional views of the line A-A' and the line B-B' in FIG. 1, respectively. Referring to FIG. 1 , the touch panel 100 of this embodiment includes a substrate 110 , a plurality of first sensing series 120 and a plurality of second sensing series 130 .

In this embodiment, the first sensing series 120 and the second sensing series 130 are disposed on the same surface of the substrate 110, wherein the material of the substrate 110 can be glass, sapphire glass, polyethylene terephthalate Diester (polyethylene terephthalate, hereinafter referred to as PET), polymethylmethacrylate (polymethylmethacrylate, hereinafter referred to as PMMA), propylene carbonate (hereinafter referred to as PC), triacetyl cellulose (cellulose triacetate, hereinafter referred to as TAC) or by The substrate formed by stacking the above two.

In addition, each first sensing series 120 extends along the first direction D1 and is electrically insulated from each other. Each second sensing series 130 extends along the second direction D2 and is electrically insulated from each other, wherein the first direction D1 intersects the second direction D2, and the first direction D1 in this embodiment is, for example, perpendicular to the second direction D2, But the present invention is not limited thereto.

Specifically, each first sensing series 120 includes a plurality of first sensing pads 122 and a plurality of bridge structures 124, wherein each bridge structure 124 connects two adjacent first sensing pads 122 in series along the first direction D1. catch. Each second sensing series 130 includes a plurality of second sensing pads 132 and a plurality of connecting portions 134 , and each connecting portion 134 connects two adjacent second sensing pads 132 in series along the second direction D2.

In this embodiment, the touch panel 100 may further include an insulating layer 140 . The insulating layer 140 is disposed between the first sensing series 120 and the second sensing series 130 to electrically insulate the first sensing series 120 and the second sensing series 130 from each other. Specifically, the insulating layer 140 of this embodiment includes, for example, a plurality of island-shaped insulating structures, and these insulating structures are arranged between the interlaced bridge structures 124 and the corresponding connecting portions 134, but the present invention is not limited to insulating The shape of layer 140 . In other embodiments, the insulating layer 140 can also be a strip-shaped insulating structure or completely cover the touch area (that is, the area where the first sensing series 120 and the second sensing series 130 are located). middle. In addition, the material of the insulating layer 140 in this embodiment is, for example, organic material or transparent photoresist, its refractive index falls in the range of 1.5 to 1.9, and its thickness falls in the range of 1um (micrometer) to 2um.

Please refer to FIG. 1, FIG. 2A and FIG. 2B. In this embodiment, the order of forming the first sensing series 120, the second sensing series 130 and the insulating layer 140 on the substrate 110 is, for example, to form the first sensing series 140 first. The bridging structures 124 of a sensing series 120 are then formed to form an insulating layer 140 , and finally the first sensing pads 122 and the second sensing series 130 of these first sensing series 120 are formed.

In other words, the first sensing pads 122 of the first sensing series 120 of this embodiment, the second sensing pads 132 and the connecting portion 134 of the second sensing series 130 may be formed at the same time and may have the same material, Moreover, the second sensing pads 132 and the connecting portion 134 of the second sensing series 130 are integrally formed, for example. For example, the material of the first sensing pad 122 and the second sensing series 130 can be conductive material such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, etc. And the metal oxide with good light transmittance is either grid-shaped metal, or a stacked layer of at least two of the above. In this embodiment, the material of the first sensing pad 122 and the second sensing series 130 is exemplified by metal oxide which is conductive and has good light transmittance.

On the other hand, the bridge structures 124 of the first sensing series 120 of this embodiment are not formed at the same time as the first sensing pads 122 and the second sensing series 130, and the material of each bridge structure 124 is different from that of the first sensing series 124. A material of the sensing pad 122 . For example, the material of each bridging structure 124 can be a metal material with good electrical conductivity.

Further, in this embodiment, the bridging structures 124, the first sensing pads 122 and the second sensing pads 132 are coplanarly arranged on the substrate 110, and the bridging structures 124 are located between the insulating layers 140 and the substrate. 110 , each connecting portion 134 spans over the corresponding bridging structure 124 to electrically connect two adjacent second sensing pads 132 . In addition, the sidewalls of each bridging structure 124 are covered and contacted by the corresponding first sensing pads 122 (as shown in FIG. 2A ), and the sidewalls of each island-shaped insulating structure (insulating layer 140) are covered by the corresponding The connecting portion 134 covers and contacts (as shown in FIG. 2B ).

In this embodiment, each bridging structure 124 includes a conductive pattern 124a and an optical matching pattern 124b, wherein the optical matching pattern 124b is arranged on the surface of the conductive pattern 124a facing the user, so as to reduce the intensity of the light L in the area where the bridging structure 124 is located in the viewing direction. Reflectivity. In this embodiment, the user touches, for example, from the outer surface of the substrate 110 , that is, the outer surface of the substrate 110 (the surface opposite to the component arrangement surface) is the touch surface. Therefore, the optical matching pattern 124 b of this embodiment is, for example, located between the conductive pattern 124 a and the substrate 110 . In other embodiments, when the user touches from one side of the component configuration surface, the conductive pattern 124a is arranged between the optical matching pattern 124b and the substrate 110 (so that the optical matching pattern 124b is located on the conductive pattern 124a The surface facing the user) to reduce the reflectivity of the light L in the viewing direction in the region where the bridging structure 124 is located.

In addition, the optical matching pattern 124b of this embodiment has substantially the same profile as the conductive pattern 124a. Specifically, the sidewalls of the conductive patterns 124a of each bridging structure 124 are, for example, aligned with the sidewalls of the optical matching patterns 124b.

In the prior art, metal materials are used to make bridge structures connecting two adjacent sensing pads, and the metal bridge structures are also called metal bridges. The reflectivity of the metal bridge is high, causing most of the light to be reflected at the metal bridge, resulting in poor visual effects of the touch panel (for example, bright spots can be seen in the area where the metal bridge is located). In contrast, in this embodiment, by disposing the optical matching pattern 124b between the conductive pattern 124a and the substrate 110, the matching of the refractive index between the conductive pattern 124a and the optical matching pattern 124b can be used to reduce the reflection of the area where the conductive pattern 124a is located. Rate.

Specifically, the conductive pattern 124a is made of metal and has low light transmittance. The light transmittance of the optical matching pattern 124b of each bridge structure 124 is relatively greater than the light transmittance of the conductive pattern 124a. Therefore, when the light L is irradiated from the substrate 110 toward the first sensing series 120 , the light L will pass through the optical matching pattern 124 b and irradiate to the conductive pattern 124 a. That is to say, the optical matching pattern 124b is not a component intended to block the light L, but a component that allows the light L to pass through. In addition, since the conductive pattern 124a made of metal material can be regarded as a reflective surface, the light L does not easily pass through the conductive pattern 124a, but is blocked by the conductive pattern 124a. In this way, this embodiment does not need to consider the reflection of the light L caused by the film layer above the conductive pattern 124a, but only considers the reflectivity of the optical matching pattern 124b between the substrate 110 and the conductive pattern 124a to determine the Visual effects at the location of the bridging structure 124 .

In detail, through the following reflectance formulas (including formula 1, formula 2 and formula 3), this embodiment can deduce the range of the refractive index and the range of the extinction coefficient of the optical matching pattern 124b, so that the light L is directed from the substrate 110 to When the first sensing series 120 is irradiated, the reflectivity of the light L in the region where the bridge structure 124 is located is substantially the same as the reflectivity of the light L in the region outside the bridge structure 124 .

$R={\left|\frac{r_{01}+r_{12}\×e^{-2\mathrm{i\β}}}{1+r_{01}{r}_{12}\×e^{-2\mathrm{i\β}}}\right|}^2$ (Formula 1)

$\mathrm{\β}=\frac{2\mathrm{\π}}{\mathrm{\λ}}{N}_1{d}_1$ (Formula 2)

N ₁ =n ₁ +ik ₁ (Formula 3)

Wherein, R is reflectivity, _r01 is the reflection coefficient of light L at the junction of substrate 110 and optical matching pattern 124b, _r12 is the reflection coefficient of light L at the junction of optical matching pattern 124b and conductive pattern 124a, and λ is light L wavelength, d ₁ is the thickness of the optical matching pattern 124b, n ₁ is the refractive index of the optical matching pattern 124b, and k ₁ is the extinction coefficient of the optical matching pattern 124b.

According to the simulation results, under the conditions that the refractive index of the optical matching pattern 124b falls within the range of 1.5 to 2.5, and the extinction coefficient of the optical matching pattern 124b falls within the range of 0.5 to 2.5, the light L in the region where the bridge structure 124 is located The reflectivity can be less than 20%. Furthermore, under the above conditions, if the film thickness Hb of the optical matching pattern 124b of each bridge structure 124 is greater than and less than Then the reflectivity of the light L in the region where the bridging structure 124 is located can be further reduced to below 10%. That is to say, in this embodiment, the reflectivity of the region where the conductive pattern 124a (bridge structure 124) is located can be reduced by matching the refractive index, extinction coefficient, and thickness of the conductive pattern 124a and the optical matching pattern 124b, and the light L is transmitted from the substrate When the light 110 irradiates toward the first sensing series 120 , the reflectivity of the light L in the region where the bridge structure 124 is located is approximately the same as the reflectivity of the light L in the region outside the bridge structure 124 . In this way, the touch panel 100 of this embodiment can have a good visual effect.

In this embodiment, the conductive pattern 124a may be a single-layer structure. The material of the single-layer structure can be selected from gold, silver, copper, aluminum, chromium, platinum, rhodium, molybdenum, titanium, nickel, indium, tin or alloys thereof, or nitrides, oxides, and oxynitrides of the above metals. thing. Alternatively, the conductive pattern 124a can be a multi-layer stacked layer, and these stacked layers have different materials, and these materials can be selected from the materials of the above-mentioned single-layer structure. On the other hand, the material of the optical matching pattern 124b of each bridging structure 124 can be selected from the same material as the above-mentioned single-layer structure. However, the material of the optical matching pattern 124b and the material of the conductive pattern 124a need to have different mixing ratios so as to have different refractive indices, so as to lower the conductive pattern 124a (bridging structure 124 ) when the refractive indices of the two are matched. The reflectivity of the area.

For example, when the bridge structure is generally molybdenum-aluminum-molybdenum or aluminum-molybdenum, the reflectivity of light L in the bridge structure is as high as 50-90%. In contrast, if the molybdenum in the molybdenum-aluminum-molybdenum or aluminum-molybdenum structure is changed to an optical matching pattern (such as molybdenum oxide, nitride or oxynitride) to configure the molybdenum aluminum molybdenum or aluminum molybdenum structure , then the reflectivity of light L on the bridge structure 124 will be reduced to below 20%, or under the structure of molybdenum-aluminum-molybdenum or aluminum-molybdenum structure, an optical matching pattern (for example, molybdenum) is arranged on the molybdenum closest to the user. Oxide, nitride or oxynitride), the reflectivity will be further reduced to below 10%. In addition, considering the conductivity of the conductive pattern 124a, in order to maintain a certain sensing sensitivity of the touch panel 100, the film thickness Ha of the conductive pattern 124a is, for example, greater than The film thickness Hb of the optical matching pattern 124b is, for example, less than

In addition, each bridging structure 124 of this embodiment may further include a protection pattern 124c disposed on the conductive pattern 124a. That is, the conductive pattern 124a is located between the protection pattern 124c and the optical matching pattern 124b. The protection pattern 124c may be used to protect the conductive pattern 124a, increase the structural strength of the bridging structure 124, prevent the conductive pattern 124a from being oxidized, and the like. In addition, the protection pattern 124c can also be used to increase the adhesion between the conductive pattern 124a and the insulating layer 140 . Therefore, the protection pattern 124c can be made of a material with better adhesion effect, such as the material of the aforementioned optical matching pattern 124b. In addition, the film thickness Hc of the protection pattern 124c is, for example, less than

It should be noted that the design concept of the conductive pattern 124 a and the optical matching pattern 124 b in the bridge structure 124 is also applicable to the first sensing pad 122 and the second sensing series 130 . Specifically, in other embodiments, when the material of the first sensing pads 122 and the second sensing series 130 is grid metal with relatively high reflectivity, these first sensing pads 122 and these The second sensing series 130 may further include an optical matching layer. That is, the first sensing pads 122 and the second sensing series 130 respectively include a grid-shaped metal layer and an optical matching layer, and the optical matching layer is located on the surface of the grid-shaped metal layer facing the user. In this way, through the matching of the refractive index, extinction coefficient and thickness of the grid-shaped metal layer and the optical matching layer, the reflectivity of light in the area where the grid-shaped metal layer is located in the viewing direction can be reduced, so that the touch panel has good performance. visual effects.

On the other hand, in addition to the impact of the metal bridges on the visual effect of the touch panel, the contours of the first sensing series 120 and the second sensing series 130 may also affect the visual effect of the touch panel. Therefore, in another embodiment, as shown in FIGS. 3A and 3B , the aforementioned touch panel 100 may further include a matting layer 150 . 3A and 3B are schematic cross-sectional views of a touch panel according to a second embodiment of the present invention. Referring to FIG. 3A and FIG. 3B, the matting layer 150, for example, completely covers the touch area of the touch panel 100 (that is, the area where the first sensing series 120 and the second sensing series 130 are located), and this The first sensing series 120 and the second sensing series 130 of the embodiment are, for example, located between the light-extinction layer 150 and the substrate 110 , but the present invention is not limited thereto. In other embodiments, the extinction layer 150 may also cover the substrate 110 and be located between the substrate 110 and the first sensing series 120 and between the substrate 110 and the second sensing series 130 . In addition, the material of the matting layer 150 can be a common insulating material, such as silicon oxide, silicon nitride, silicon oxynitride, silicon aluminum oxide, or a stacked layer of at least two of the above materials.

Through the setting of the light-extinction layer 150, the gap G (please refer to FIG. The difference in reflectivity between the sensing series 120 and the second sensing series 130) can be compensated. In this way, the visibility of the contours of the sensing series 120 and 130 to human eyes can be reduced, and the visual effect of the touch panel 100 can be further improved. In addition, when the first sensing pad 122 and the second sensing series 130 are grid metal, for example, when the conductive pattern is made of the same material, the first sensing pad 122 and the second sensing series can also be 130 corresponds to the viewing direction (that is, between the user and the first sensing pad 122 and the second sensing series 130 ) to configure the above-mentioned optical matching pattern to reduce the reflectivity of the touch panel.

FIG. 4 is a schematic partial top view of a touch panel according to a third embodiment of the present invention. 5A and 5B are schematic cross-sectional views of the line C-C' and the line D-D' in FIG. 4, respectively. Please refer to FIG. 4 , FIG. 5A and FIG. 5B , the touch panel 400 of this embodiment has similar film layers, similar materials and similar functions to the aforementioned touch panel 100 . The difference between the two mainly lies in that the formation sequence of the first sensing series 420 , the second sensing series 430 and the insulating layer 440 of the touch panel 400 is: the first sensing series 420 of the first sensing series 420 is formed first. A sensing pad 422 and these second sensing series 430 are connected to form an insulating layer 440, and finally each bridge structure 424 of the first sensing series 420 is formed, wherein the first sensing series 420, the second sensing series The materials and structures of the sensing series 430 and the insulating layer 440 can refer to the materials and structures of the first sensing series 120 , the second sensing series 130 , and the insulating layer 140 of the touch panel 100 described above, and will not be repeated here. .

Further, the connection portions 434, the first sensing pads 422 and the second sensing pads 432 of this embodiment are coplanar, and the connection portions 434 are located between the insulating layer 440 and the substrate 110, so that each bridge The structure 424 straddles the corresponding connecting portion 434 to electrically connect two adjacent first sensing pads 422 . That is to say, a partial area of each connecting portion 434 in this embodiment is covered by the corresponding bridging structure 424 . (as shown in Figure 5B). In addition, a partial area of each first sensing pad 422 is located between the optical matching pattern 424b of each bridge structure 424 and the substrate 110 (as shown in FIG. 5A ).

In addition, the optical matching pattern 424b and the conductive pattern 424a of each bridge structure 424 in this embodiment have substantially the same outline. Specifically, the sidewalls of the conductive patterns 424a of each bridge structure 424 are, for example, aligned with the sidewalls of the optical matching patterns 424b, but the invention is not limited thereto. In another embodiment, as shown in FIGS. 6A and 6B , the sidewalls of the optical matching patterns 424 b of each bridge structure 424 may also be covered by conductive patterns. 6A and 6B are schematic cross-sectional views of a touch panel according to the fourth embodiment of the present invention. The difference between FIG. 5A and FIG. 5B and FIG. 6A and FIG. Whether it is patterned at the same time or not, the present invention is not intended to limit the manufacturing method of each bridging structure 424 (for example, the number of processes).

In the embodiment of Fig. 5A, Fig. 5B and Fig. 6A, Fig. 6B, through the setting of the optical matching pattern 424b, and the design of the above parameters (referring to the film thickness Hb of each optical matching pattern 424b is greater than and less than And the refractive index falls in the range of 1.5 to 2.5, and the extinction coefficient falls in the range of 0.5 to 2.5), the reflectivity of the light L in the area where the bridge structure 424 is located may also be less than 20%. That is to say, in this embodiment, the reflectivity of the region where the conductive pattern 424a (bridge structure 124) is located can also be reduced by matching the refractive index, extinction coefficient, and thickness of the conductive pattern 424a and the optical matching pattern 424b, and the light L is transmitted by When the substrate 110 is irradiated toward the first sensing series 420 , the reflectivity of the light L in the region where the bridge structure 424 is located is greatly reduced. In this way, the touch panel 400 of this embodiment can have a good visual effect.

In addition, the bridge structure 424 of the touch panel 400 may further include a protection pattern 424c disposed on the conductive pattern 424a, which is used to protect the conductive pattern 424a, increase the structural strength of the bridge structure 424, and prevent the oxidation of the conductive pattern 424a (here the protection pattern 424c will not be in direct contact with the insulating layer 440). The material and film thickness Hc of the protection pattern 424c may be the same as those of the protection pattern 124c in FIG. 2A and FIG. 2B , and details will not be repeated here.

In addition, as shown in FIGS. 7A and 7B , in another embodiment, the touch panel 400 may further include a matting layer 450 covering the substrate 110 . 7A and 7B are schematic cross-sectional views of a touch panel according to a fifth embodiment of the present invention. Referring to FIG. 7A and FIG. 7B , the extinction layer 450 of this embodiment is located between the substrate 110 and the first sensing series 420 and between the substrate 110 and the second sensing series 430 . However, in other embodiments, the extinction layer 450 can also cover the first sensing series 420 and the second sensing series 430, so that the first sensing series 420 and the second sensing series The series 430 is located between the matting layer 450 and the substrate 110 .

Through the setting of the extinction layer 450, the gap G (please refer to FIG. The reflectance difference between the sensing series 420 and the second sensing series 430) can be compensated. In this way, the visibility of each sensing series to human eyes can be reduced, and the visual effect of the touch panel 400 can be further improved.

FIG. 8 is a schematic partial top view of a touch panel according to a sixth embodiment of the present invention. Referring to FIG. 8 , the touch panel 800 of this embodiment includes a substrate 810 , a plurality of first sensing series 820 and a plurality of second sensing series 830 , wherein the substrate 810 can be used as a cover lens. That is to say, in actual operation, the first sensing series 820 , the second sensing series 830 and the insulating layer 840 are located on the inner surface of the substrate 810 , while the user touches the outer surface of the substrate 810 . Specifically, the substrate 810 has a touch area A1 and a surrounding area A2 located on at least one side of the touch area A1, and the first sensing series 820 and the second sensing series 830 are located in the touch area A1 . In this embodiment, the first sensing series 820 and the second sensing series 830 can adopt the configuration relationship of similar components in any one of the aforementioned first to fifth embodiments, and the present embodiment The touch panel 800 may further include an insulating layer 840 to electrically insulate the first sensing series 820 from the second sensing series 830 . Furthermore, the touch panel 800 of this embodiment may also optionally include the aforementioned matting layer to improve the visual effect of the touch panel 800 .

The difference from the foregoing first to fifth embodiments is that the touch panel 800 of this embodiment further includes a decoration layer 850 , wherein the decoration layer 850 is located in the surrounding area A2 . Specifically, the decoration layer 850 is intended to shield the light-shielding elements (not shown) located in the surrounding area A2. In other embodiments, touch elements can also be selectively arranged in the surrounding area A2 as required.

In this embodiment, for example, the decoration layer 850 is located on the same side of the substrate 810 as the first sensing series 820 and the second sensing series 830 . That is to say, the decoration layer 810 of this embodiment, the first sensing series 820 and the second sensing series 830 are located on the same surface (inner surface) of the substrate 810 . However, in other embodiments, the decoration layer 850 can also be disposed on the side of the substrate 810 opposite to the first sensing series 820 and the second sensing series 830, that is, the decoration layer 850 can also be located on the substrate. 810 on the outer surface (touch surface). In addition, in other embodiments, the touch panel 800 may further include a support plate (not marked) disposed on the side of the substrate 810 opposite to the first sensing series 820 and the second sensing series 830 , That is to say, the carrier board is disposed on the outer surface (touch surface) of the substrate 810, and the decoration layer 850 is, for example, disposed on the carrier board and located between the substrate 810 and the carrier board, wherein the orthographic projection of the decoration layer 850 on the substrate 810 Located in the surrounding area A2 of the substrate 810 .

To sum up, the touch panel of the present invention uses the conductive pattern and the optical matching pattern to realize the bridge structure of the sensing series, and by setting the optical matching pattern on the surface of the conductive pattern facing the user, the light in the viewing direction is reduced. The reflectivity of the region where the bridging structure is located makes it difficult for the user to perceive the outline of the bridging structure, so that the touch panel has a good visual effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (28)

1. a contact panel, is characterized in that, comprising:

One substrate;

A plurality of the first sensing serials, be disposed on this substrate, respectively this first sensing serials is extended along a first direction, respectively this first sensing serials comprises a plurality of the first sensor pads and a plurality of bridging structure, respectively this bridging structure is connected in series adjacent two the first sensor pads along this first direction, wherein respectively this bridging structure comprises a conductive pattern and an optical match pattern, and this optical match pattern arrangement is between user and conductive pattern, to reduce view direction glazed thread at the reflectivity of this bridging structure region; And

A plurality of the second sensing serials, be electrically insulated from those the first sensing serials, and those second sensing serials are disposed on this substrate, respectively this second sensing serials is extended along a second direction, this first direction and this second direction intersect, respectively this second sensing serials comprises a plurality of the second sensor pads and a plurality of connecting portion, and respectively this connecting portion is connected in series adjacent two the second sensor pads along this second direction.

2. contact panel according to claim 1, is characterized in that, also comprises an insulation course, and this insulation course is disposed between those first sensing serials and those the second sensing serials.

3. contact panel according to claim 1, is characterized in that, this optical match pattern is between this conductive pattern and this substrate.

4. contact panel according to claim 1, is characterized in that, the refractive index of this optical match pattern drops in 1.5 to 2.5 scope, and respectively the extinction coefficient of this optical match pattern drops in 0.5 to 2.5 scope.

5. contact panel according to claim 4, is characterized in that, the thickness of this optical match pattern of each bridging structure is greater than and be less than

6. contact panel according to claim 1, it is characterized in that, also comprise an insulation course, be disposed between those first sensing serials and those the second sensing serials, be configured on this substrate to those bridging structures, those first sensor pads and those the second sensor pad coplines, and those bridging structure positions, between this insulation course and this substrate, make respectively this connecting portion cross over this corresponding bridging structure to be electrically connected adjacent two the second sensor pads.

7. contact panel according to claim 1, is characterized in that, also comprises a delustring layer, and those first sensing serials and those the second sensing serials are between this delustring layer and this substrate.

8. contact panel according to claim 1, it is characterized in that, also comprise an insulation course, this insulation course is disposed between those first sensing serials and those the second sensing serials, be configured on this substrate to those connecting portions, those first sensor pads and those the second sensor pad coplines, and those connecting portions, between this insulation course and this substrate, make respectively this bridging structure cross over this corresponding connecting portion to be electrically connected adjacent two the first sensor pads.

9. contact panel according to claim 1, is characterized in that, also comprises a delustring layer, be covered on this substrate, and between this substrate and those the first sensing serials and between this substrate and those the second sensing serials.

10. contact panel according to claim 1, is characterized in that, respectively the sidewall of the sidewall of this conductive pattern of this bridging structure and this optical match pattern trims.

11. contact panels according to claim 1, is characterized in that, respectively the sidewall of this optical match pattern of this bridging structure is coated by this conductive pattern.

12. contact panels according to claim 1, is characterized in that, respectively this bridging structure also comprises a protection pattern, be disposed on this conductive pattern, and this conductive pattern are between this protection pattern and this optical match pattern.

13. contact panels according to claim 1, is characterized in that, this light is less than 20% at the reflectivity of this bridging structure region.

14. contact panels according to claim 1, is characterized in that, this light is less than 10% at the reflectivity of this bridging structure region.

15. contact panels according to claim 1, it is characterized in that, respectively the material of this conductive pattern of this bridging structure comprises nitride, the oxide of gold, silver, copper, aluminium, chromium, platinum, rhodium, molybdenum, titanium, nickel, indium, tin or its alloy or above-mentioned metal, one of them person or the above-mentioned at least stack layer of the two of oxides of nitrogen.

16. contact panels according to claim 1, is characterized in that, respectively the material of this optical match pattern of this bridging structure comprises the material identical with this conductive pattern.

17. contact panels according to claim 1, is characterized in that, respectively the material of this optical match pattern of this bridging structure is oxide, nitride or the oxides of nitrogen of this conductive pattern material.

18. contact panels according to claim 1, is characterized in that, respectively the thickness of this optical match pattern of this bridging structure is less than

19. contact panels according to claim 1, is characterized in that, respectively this first sensor pad is between this optical match pattern and this substrate of this bridging structure respectively.

20. contact panels according to claim 1, is characterized in that, respectively the sidewall of this bridging structure is covered and contacts by those first sensor pads of correspondence.

21. contact panels according to claim 1, is characterized in that, respectively the thickness of this conductive pattern of this bridging structure is greater than

22. contact panels according to claim 1, is characterized in that, respectively the light transmittance of this optical match pattern of this bridging structure is greater than the light transmittance of this conductive pattern.

23. contact panels according to claim 1, it is characterized in that, the material of this first sensor pad and the second sensing serials comprises indium tin oxide, indium-zinc oxide, aluminium tin-oxide, aluminium zinc oxide, indium germanium zinc oxide, grid-shaped metal or the above-mentioned at least stack layer of the two.

24. contact panels according to claim 1, it is characterized in that, those first sensor pads and those the second sensing serials comprise respectively a grid-shaped metal layer and an optical match layer, and this optical match layer is positioned at this grid-shaped metal aspect on user's surface.

25. contact panels according to claim 1, is characterized in that, this substrate has the peripheral region that a Touch Zone and is positioned at least one side of this Touch Zone, and this contact panel also comprises a decorative layer, and this decorative layer is positioned at this peripheral region.

26. contact panels according to claim 25, is characterized in that, this decorative layer is positioned at a side identical with those first sensing serials and those the second sensing serials on this substrate.

27. contact panels according to claim 25, is characterized in that, this decorative layer is positioned at a side relative with those first sensing serials and those the second sensing serials on this substrate.

28. contact panels according to claim 25, it is characterized in that, also comprise a board, this board is positioned at a side relative with those first sensing serials and those the second sensing serials on this substrate, and this decorative layer is disposed on this board, and between this substrate and this board, wherein the orthogonal projection of this decorative layer on this substrate is positioned at this peripheral region.