KR20180080760A - Touch sensing electrode structure and touch sensor including the same - Google Patents

Abstract

A touch sensing electrode structure of the present invention comprises: a plurality of electrode lines extending in a zigzag line shape in a first direction, and arranged along a second direction crossing the first direction; and connection electrodes extending in the second direction, connecting the neighboring electrode lines, and forming a plurality of concave polygonal patterns with the electrode lines. Therefore, electrical and optical properties of a touch sensor can be improved by including the connection electrode.

Description

Technical Field [0001] The present invention relates to a touch sensing electrode structure and a touch sensor including the touch sensing electrode structure,

The present invention relates to a touch sensing electrode structure and a touch sensor including the same. More particularly, to a touch sensing electrode structure including a plurality of different patterns and a touch sensor including the same.

As the information society has developed in recent years, demands for the display field have been presented in various forms. For example, various flat panel display devices, such as a liquid crystal display device, a plasma display panel device, and a liquid crystal display device, which have features of thinning, light weight, and low power consumption, An electro luminescent display device, an organic light-emitting diode display device, and the like have been studied.

Meanwhile, a touch panel, which is an input device attached to the display device and capable of inputting a command of a user by selecting an instruction content displayed on the screen as a human hand or an object, And an information input function have been developed.

In addition, as the display device is becoming thinner, it is attempted to realize a flexible property that can be folded or bent, and accordingly, the touch panel also needs to be developed so that it can be employed in a flexible display device.

When the touch panel is inserted into the display device, display quality may be deteriorated due to visibility of the electrode patterns. Therefore, it is necessary to improve the optical characteristics while realizing softening and thinning of the touch panel.

For example, as disclosed in Korean Patent Laid-Open Publication No. 2014-0092366, recently, a touch screen panel in which a touch sensor is combined with various image display devices has been developed. However, as described above, Is continuing.

Korea Patent Publication No. 2014-0092366

An object of the present invention is to provide a touch sensing electrode structure having improved optical and electrical characteristics.

An object of the present invention is to provide a touch sensor including a touch sensing electrode structure having improved optical and electrical characteristics.

An object of the present invention is to provide an image display device including a touch sensor having improved optical and electrical characteristics.

1. A plasma display panel comprising: a plurality of electrode lines extending in a zigzag line in a first direction and arranged in a second direction intersecting the first direction; And

And connection electrodes extending in the second direction to connect the neighboring electrode lines and form a plurality of concave polygonal patterns with the electrode lines.

2. The touch sensing electrode structure of claim 1, wherein the electrode lines include a first electrode pattern and a second electrode pattern that alternate with each other and are alternately repeated.

3. The printed wiring board according to claim 2, wherein the concave polygonal pattern includes convex portions and concave portions defined in a crossing region of the first electrode pattern and the second electrode pattern, and the connecting electrodes are included in adjacent concave polygonal patterns And connecting between the convex portion and the concave portion.

4. The touch sensing electrode structure of claim 2, wherein the inclination angle of the first electrode pattern or the second electrode pattern with respect to the first direction is 10 to 70 degrees,

5. The touch sensing electrode structure of claim 4, wherein the inclination angle is 10 to 50 degrees.

6. The touch sensing electrode structure of claim 2, wherein the concave polygonal pattern is defined by two opposing first electrode patterns, second electrode patterns, and connection electrodes.

7. The touch sensing electrode structure of claim 2, wherein a mesh structure is defined by the electrode lines and the connection electrodes, and a plurality of unit cells formed by patterning the mesh structure are combined.

8. The touch sensing electrode structure of claim 7, wherein the unit cell has a convex polygonal structure, and the electrode cell has a concave polygonal structure.

9. The touch sensing electrode structure of claim 7, further comprising a trace electrically connected to the electrode cell

10. The touch sensing electrode structure of claim 9, wherein the trace comprises a portion of the electrode lines.

11. The touch sensing electrode structure of claim 10, wherein the first electrode pattern and the second electrode pattern included in the trace have the same length and inclination angle as the first electrode pattern and the second electrode pattern included in the electrode cell.

12. The touch sensing electrode structure of claim 1, wherein the electrode line and the connection electrode comprise the same metal wire.

13. A touch sensor comprising a touch sensing electrode structure of any one of claims 1 to 12.

14. The touch sensor of claim 13, wherein the touch sensor is a self-capacitance type.

15. An image display device comprising the touch sensing electrode structure of any one of claims 1 to 12.

According to embodiments of the present invention, the touch sensing electrode structure may be formed to include a plurality of concave polygonal patterns that are arranged in zigzags utilizing the connecting electrodes. Thus, the density of the electrode pattern can be improved, the resistance can be lowered, and the resolution of the touch sensing can be increased.

Further, it is possible to reduce the visibility of the touch sensing electrode by controlling the angle formed between the connection electrode and the concave polygonal pattern.

In addition, since the touch sensor structure includes the electrode cells in which the plurality of polygon unit cells are combined, the variation in capacitance or resistance value increases according to the touch point, and the touch sensing resolution can be improved.

The touch sensor includes, for example, a single-layer or single-level touch sensing electrode structure, and a flexible display device can be implemented by being included in the image display device.

1 and 2 are schematic plan views illustrating a touch sensing electrode structure according to embodiments of the present invention.
3 is a schematic plan view illustrating an electrode cell and a trace structure of a touch sensing electrode structure according to embodiments of the present invention.
4 is a schematic cross-sectional view illustrating a touch sensor according to an embodiment.
5 is a schematic cross-sectional view illustrating a touch sensor according to an embodiment.
6 is a schematic cross-sectional view showing an image display apparatus according to one embodiment.

According to embodiments of the present invention, there is provided a touch sensing electrode structure defined by a plurality of electrode lines and connection electrodes, including a concave polygonal pattern repeatedly arranged in a zigzag pattern, with reduced visibility and improved touch resolution do.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. And shall not be construed as limited to such matters.

<Touch Sensing  Electrode Structures>

1 and 2 are schematic plan views illustrating a touch sensing electrode structure according to embodiments of the present invention. 1 and 2 are views for explaining the arrangement of individual electrode patterns included in the touch sensing electrode structure.

For convenience of explanation, the electrode lines of the touch sensing electrode structure are shown separately in FIG. 1, and the electrode lines and the connection electrode are shown in FIG. For example, FIG. 2 is a plan view showing the electrode structure in the sensing region I of the touch sensing electrode structure.

In FIGS. 1 and 2, two directions intersecting with each other on the same plane are defined as a first direction and a second direction. For example, the first direction and the second direction may intersect perpendicularly to each other. The direction indicated by the arrow and the direction opposite thereto are described in the same direction.

Referring to FIG. 1, the touch sensing electrode structure may include a plurality of electrode lines 10. For example, each electrode line 10 extends in a first direction, and a plurality of electrode lines 10 may be arranged along a second direction.

The electrode line 10 may include a first electrode pattern 13 and a second electrode pattern 15. Each electrode line 10 may include first electrode patterns 13 and second electrode patterns 15 that are alternately and repeatedly arranged. The first electrode patterns 13 and the second electrode patterns 15 may be continuously connected to each other.

The first electrode patterns 13 and the second electrode patterns 15 may cross each other at a predetermined angle. Accordingly, the electrode line 10 may have a bent line shape or a zigzag line shape including a plurality of bent portions.

The electrode lines 10 may be distributed together in the sensing region I, the intermediate region II and the trace region III of the touch sensing electrode structure (see FIG. 3).

Referring to FIG. 2, a connecting electrode 20 may be disposed between adjacent electrode lines 10. According to the exemplary embodiments, the concave polygonal pattern can be defined by the adjacent first electrode patterns 13, second electrode patterns 15, and connecting electrodes 20. The concave polygonal patterns may be arranged in zigzags.

For example, two adjacent concave polygonal patterns share one side, and a plurality of concave polygonal patterns may be repeatedly arranged. Accordingly, the touch sensing electrode structure may be a mesh structure including the concave polygonal patterns.

In some embodiments, the concave polygonal pattern may be a concave hexagonal pattern. As shown in FIG. 2, a pair of connection electrodes 20 adjacent in the first direction, a pair of first patterns 13 adjacent in the second direction, The concave hexagonal pattern can be defined by a pair of second patterns 15. [

The concave polygonal pattern may include a convex portion 30 and a concave portion 35 facing each other in the second direction. In the exemplary embodiments, the connecting electrode 20 extends in the second direction and can connect the convex portion 30 and the concave portion 35 of the adjacent concave polygonal patterns to each other.

The connection electrodes 20 may be arranged along the first direction to form a connection electrode column, and a plurality of connection electrode columns may be formed along the second direction. The neighboring connection electrode columns may be arranged such that the connection electrodes 20 belonging to the respective columns are partially overlapped in the first direction.

As described above, as the concave polygonal patterns are arranged in a staggered manner by the connection electrodes 20, the density of the electrodes or patterns connected to each other per unit area can be increased while securing a desired aperture ratio. Therefore, the transmittance and the electrical characteristics (for example, the touch sensitivity) can be improved at the same time.

In some embodiments, the tilt angle of the first electrode pattern 13 or the second electrode pattern 15 may range from about 10 to 70 degrees ( ^o ), and preferably from about 10 to 50 degrees .

The inclination angle may be defined by an imaginary straight line (indicated by a dotted line) extending in the first direction shown in FIG. 2 and an angle formed by the first electrode pattern 13 or the second electrode pattern 15. A desired pattern density and an opening ratio can be ensured in the range of the inclination angle so that the optical and electrical characteristics of the touch sensor including the touch sensing electrode structure can be improved.

The electrode line 10 and the connection electrode 20 may be formed of the same conductive material. For example, the electrode line 10 and the connecting electrode 20 may comprise a metal wire or a transparent conductive oxide.

The metal wire may be at least one selected from the group consisting of Ag, Au, Cu, Al, Pt, Pd, Cr, Ti, (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc or alloys thereof. These may be used alone or in combination of two or more.

Examples of the transparent conductive oxide include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), and cadmium tin oxide (CTO).

In the exemplary embodiments, the electrode line 10 and the connecting electrode 20 may be formed from the same metal wire. Therefore, the resistance can be relatively decreased compared with the case where the transparent conductive oxide is included, and the signal transmission speed can be improved, and the flexible characteristic can be improved together.

Further, by having the electrode arrangement and the structure described above, when applied to, for example, an image display apparatus such as a flexible display, it is possible to secure a desirable electrical characteristic and an aperture ratio while improving the density of the pattern per unit area. Therefore, it is possible to realize an improved touch sensing resolution while minimizing the visibility of the electrode or the pattern.

3 is a schematic plan view illustrating an electrode cell and a trace structure of a touch sensing electrode structure according to embodiments of the present invention.

Referring to FIG. 3, the touch sensing electrode structure is formed on the substrate layer 100, and includes an electrode cell 120 and a trace (not shown) formed by patterning the mesh structure described with reference to FIGS. 1 and 2, (130).

The base layer 100 may be divided into a sensing region I, an intermediate region II, and a trace region III. According to exemplary embodiments, the electrode cell 120 is formed on the sensing region I of the substrate layer 100, and the plurality of unit cells 110 may have a merged shape. For example, a plurality of unit cells 110 may be connected to each other by the merging unit 115 to define the electrode cells 120. [

The unit cells 110 may include the electrode patterns and the connection electrodes described with reference to FIGS. 1 and 2. FIG. For example, the unit cell 110 may be formed by patterning the mesh structure including the electrode pattern and the connection electrode in a polygonal shape.

Each unit cell 110 may have concave polygonal patterns included in the mesh structure and may have a convex polygonal shape such as diamond or rhombus as a whole. As the plurality of unit cells 110 are arranged along the second direction, for example, and are connected by the merging portion 115, each electrode cell 120 may have a substantially concave polygonal shape.

Although only one electrode cell 120 is shown in FIG. 3, a plurality of electrode cells 120 may be physically and electrically separated from each other and arranged to mesh with each other.

A trace 130 including the electrode lines 10 shown in FIG. 1 may be formed on the trace region III of the base layer 100. In some embodiments, the trace 130 may be comprised of electrode lines 10 (see FIG. 1) and may have a zigzag line or a stripe shape extending in the first direction. The trace 130 functions as a wiring, for example, as a position detection line of a touch sensor, and a plurality of traces 130 may be focused on a pad portion (not shown) to be electrically connected to a driving circuit. The length and / or the inclination angle of the electrode patterns included in the trace 130 may be substantially the same as the electrode patterns included in the electrode cells 120 or the unit cells 110.

For example, each trace 130 may be electrically connected to one electrode of the electrode cells 120 formed on the sensing region I.

The intermediate region II may be disposed between the sensing region I and the trace region III and provided as a buffer region between the two regions.

In some embodiments, a connecting portion 117 of substantially the same or similar shape as the merging portion 115 is disposed on the intermediate region II, and a part of the electrode lines 10 (see FIG. 1) II). &Lt; / RTI &gt;

For example, a portion of the electrode lines arranged on the mediation region II may be provided as a dummy line, and the other portion may be provided as a trace connected to the electrode cell 120. [

The shape of the unit cell 110 or the electrode cell 120 shown in FIG. 3 is exemplary and the shape of the unit cell 110 and the number of the unit cells 110 included in the electrode cell 120 are different from each other, And the circuit design.

According to the above-described exemplary embodiments, the electrode cell 120 can be formed to include, for example, a plurality of unit cells 110 having a convex polygonal shape. Accordingly, the resistance or capacitance variation according to the touch position can be increased compared to a simple polygon (for example, a diamond mesh type) electrode cell, whereby the resolution of the touch sensing can be improved.

The substrate layer 100 is used to mean a film-type substrate used as a base layer for forming the touch sensing electrode structure. For example, the substrate layer 100 can be a film material conventionally used in a touch sensor, without any particular limitation, and can include, for example, glass, polymer, and / or inorganic insulating material. Examples of the polymer include a polymer such as a cyclic olefin polymer (COP), polyethylene terephthalate (PET), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyphenylene sulfide (PAS), cellulose triacetate (TAC), polycarbonate (PC), cyclic olefin copolymer (COC), poly (ethylene terephthalate), poly Methyl methacrylate (PMMA), and the like. Examples of the inorganic insulating material include silicon oxide, silicon nitride, silicon oxynitride, metal oxide, and the like.

4 and 5 are schematic sectional views showing a touch sensor according to embodiments of the present invention.

Referring to FIG. 4, the touch sensor may include a substrate layer 100, a touch sensing electrode structure 150, and an insulating layer 160.

The substrate layer 100 may be substantially the same as described with reference to Fig. The touch sensing electrode structure 150 described with reference to FIGS. 1 to 3 may be formed on the base layer 100.

The insulating layer 160 may be formed on the substrate layer 100 to at least partially cover the touch sensing electrode structure 150. The insulating layer 160 may be formed of a transparent insulating material. For example, the insulating layer 160 may be formed using an inorganic insulating material such as silicon oxide, or a transparent organic material such as acrylic resin.

In some embodiments, the insulating layer 160 may include an overcoat layer that covers the touch sensing electrode structure 150 as a whole.

In exemplary embodiments, the touch sensor may be a self-capacitance type. In this case, the touch sensing electrode structure 150 is formed in a substantially single layer or single level, and a trace 130 may be formed for each electrode cell 120 (see FIG. 3). Therefore, for example, bridge electrodes included in a mutual-capacitance method are omitted, so that the thickness and flexibility of the touch sensor can be easily realized.

Referring to FIG. 5, the touch sensor may be provided in a substantially film type or inorganic type.

For example, the touch sensor may include a separation layer 103, a protection layer 105, a touch sensing electrode structure 150, an insulation layer 160, an adhesive layer 170, and a protection film 180 .

The separation layer 103 may include a polymer organic film and may include, but not limited to, a polyimide-based polymer, a poly vinyl alcohol-based polymer, a polyamic acid-based polymer, a polyamide polyamide polymer, polyethylene polymer, polystylene polymer, polynorbornene polymer, phenylmaleimide copolymer polymer, polyazobenzene polymer, polyphenyl polymer, Based polymer, a polyphenylenephthalamide-based polymer, a polyester-based polymer, a polymethyl methacrylate-based polymer, a polyarylate-based polymer, a cinnamate-based polymer, a coumarin- Based polymer, a phthalimidine-based polymer, a chalcone-based polymer, and an aromatic acetylene-based polymer. The. These may be used alone or in combination of two or more.

In some embodiments, the isolation layer 103 is formed on a carrier substrate (not shown) such as a glass substrate and is formed to facilitate the stripping process of the carrier substrate after forming the touch electrode structure 150 .

The protection layer 105 is formed on the isolation layer 103 and may be included in consideration of protection of the touch sensing electrode structure 150 and matching of the refractive index of the touch sensor. The protective layer 105 may comprise, for example, an inorganic insulating material such as silicon oxide, silicon nitride, silicon oxynitride, or the like, or a polymeric organic insulating material. In some embodiments, the formation of the protective layer 105 may be omitted.

The touch sensing electrode structure 150 according to the above-described exemplary embodiments is formed on the lower film including the isolation layer 103 and / or the protection layer 105, and the insulation covering the touch sensing electrode structure 150 A layer 160 may be formed.

In some embodiments, an adhesive layer 170 is formed on the insulating layer 160, and a protective film 180 may be applied on the adhesive layer 170.

The protective film 180 may be formed of, for example, a cellulose ester (e.g., cellulose triacetate, cellulose propionate, cellulose butyrate, cellulose acetate propionate, and nitrocellulose), polyimide, polycarbonate, polyester, polyethylene terephthalate , Transparent resin films of polystyrene, polyolefin, polysulfone, polyether sulfone, polyarylate, polyether-imide, polymethyl methacrylate, polyether ketone, polyvinyl alcohol and polyvinyl chloride. The above materials may be used alone or in combination of two or more.

The protective film 180 may be peeled off in a subsequent process to produce a thin touch sensor film. In some embodiments, the touch sensor may further include an optical functional film such as a polarizing film, a retardation film, or the like.

6 is a schematic cross-sectional view showing an image display apparatus according to embodiments of the present invention.

6, the image display device includes a base substrate 200, a pixel defining layer 205, a display layer 210, electrodes 215, interlayer insulating layers 220 and 230, a touch sensing electrode structure 240, A protective layer 250, an optical layer 260, and a window substrate 270.

The base substrate 200 may be a support substrate of a display pattern. According to exemplary embodiments, the base substrate 200 may comprise a flexible resin material, such as polyimide. In this case, the image display apparatus can be provided as a flexible display.

A pixel defining layer 205 may be formed on the base substrate 200 to expose a pixel region in which a color or an image is realized. A thin film transistor (TFT) array may be formed between the base substrate 200 and the pixel defining layer 205, and an insulating structure covering the TFT array may be formed. The pixel defining layer 205 may be formed on the insulating structure and may expose a pixel electrode (for example, an anode) that penetrates through the insulating structure and is electrically connected to the TFT.

The display layer 210 may be formed for each of the pixel regions exposed by the pixel defining layer 205. The display layer 210 includes, for example, an organic luminescent material, in which case the image display device may be provided as an OLED device. The display layer 210 may include a liquid crystal material, and in this case, the image display device may be provided as an LCD device.

An electrode 215 may be disposed on the pixel defining layer 205 and the display layer 210. The electrode 215 may be provided as an opposing electrode facing the pixel electrode. The electrode 215 may be a cathode of an image display apparatus, and may be a common electrode continuously extending over a plurality of pixel regions.

Interlayer insulating films 220 and 230 may be formed on the electrode 215. The interlayer insulating layer may include a first interlayer insulating layer 220 and a second interlayer insulating layer 230. The first interlayer insulating film 220 may be provided as a planarizing film and the second interlayer insulating film 230 may be provided as an encapsulation film.

A touch sensing electrode structure 240 according to the above-described exemplary embodiments may be disposed on the interlayer insulating layer. The touch sensing electrode structure 240 may be formed, for example, by directly depositing a metal wire on the second interlayer insulating film 230 and patterning the same. In some embodiments, the touch sensing electrode structure 240 may be fabricated in the form of a touch sensor described with reference to FIG. 4 or 5 and included in an image display device.

In one embodiment, the touch sensing electrode structure 240 may be of a self-capacitance type and may be included in the image display device substantially as a single layer or single level member. Further, it is possible to reduce, for example, interference with the electrode 215 and noise generated when the mutual capacitance method is adopted.

As described with reference to FIGS. 1 to 3, the touch sensing electrode structure 240 has an improved visibility preventing effect, and can be distributed together on the pixel defining layer 205 and the pixel region. In some embodiments, the touch sensing electrode structure 240 overlaps the pixel defining layer 205 and may be arranged so as not to overlap with the pixel region.

In addition, since the touch sensing electrode structure 240 according to the embodiments of the present invention includes a concave polygonal pattern aggregate structure, compared with the electrode structure having a simple diamond mesh structure, the electrodes, which are optically distributed on the display panel, It is possible to suppress the moire phenomenon.

A protective layer 250 covering the touch sensing electrode structure 240 is formed on the second interlayer insulating film 230 and an optical layer 260 and a window substrate 270 are stacked on the protective layer 250.

The optical layer 260 may include a functional layer capable of improving optical characteristics, transmittance, and the like of an image display device such as a polarizer or a polarizing plate, a retardation film, or the like. The window substrate 270 may function as an encapsulant layer exposed to the user side.

The touch sensing electrode structure 240 according to the exemplary embodiments may be applied to, for example, an image display device which is employed in a flexible OLED device and has improved touch resolution, transmittance, and flexible characteristics by the electrode, pattern and / Can be implemented.

Hereinafter, exemplary embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the present invention is not limited to the accompanying claims, It will be apparent to those skilled in the art that various changes and modifications can be made in the embodiments within the scope of the claims, and such variations and modifications are within the scope of the appended claims.

Example  And Comparative Example

Example

A mesh structure having the structure shown in FIG. 2 was formed using an alloy (APC) of silver (Ag), palladium (Pd), and copper (Cu) on the COP substrate layer. The electrode line width was 3 탆, the electrode thickness was 90 nm, the length of each electrode pattern (first electrode pattern and second electrode pattern) and the connecting electrode was 54.549 (5 degrees) to 49.579 (75 degrees) according to the inclination angle.

The touch sensing electrode structure according to the embodiments is formed while changing the inclination angle? Shown in FIG.

Comparative Example

A mesh structure formed of APC on the same COP substrate layer as in the examples and comprising a repeating diamond pattern (or rhombic pattern) was formed. The electrode line width was 3 mu m, the electrode thickness was 90 nm, and the lengths of two diagonal lines of each diamond pattern were 59.55 mu m and 75 mu m, respectively.

Experimental Example

1. Transmittance measurement

The reflectance of the mesh structure manufactured by the examples and the comparative example was measured with a spectroscopic colorimeter (CM-3600A, Konica Minolta) under a wavelength of 550 nm.

2. Channel resistance measurement

The channel resistance of the mesh structure manufactured by the examples and the comparative example was measured using a resistance meter (87V, FLUKE).

3. Visibility  evaluation

The mesh structure prepared according to Examples and Comparative Examples was visually observed to evaluate whether or not the electrode patterns were visually observed. Specifically, visibility of the electrode structures was evaluated through a panel of panelists who assessed that the electrode patterns were clearly recognized by visually observing the mesh structure with 10 panelists.

The evaluation results are shown in Table 1 below.

division Inclination angle ^o Transmittance (%) Channel resistance
(KΩ) Visibility evaluation Example One 5 90.55 556.24 7/10 poet 2 10 90.47 557.40 3/10 poet 3 15 90.15 556.24 2/10 poet 4 20 90.14 557.40 0/10 poet 5 22.5 90.02 581.55 0/10 poet 6 25 89.92 592.83 0/10 poet 7 45 88.19 759.84 0/10 poet 8 50 87.21 835.88 0/10 poet 9 60 84.32 1074.57 0/10 poet 10 65 81.95 1271.22 0/10 poet 11 69 79.29 1498.68 0/10 poet 12 71 77.42 1649.83 0/10 poet 13 75 72.29 2075.79 0/10 poet Comparative Example - 84.19 956.66 9/10 poet

Referring to Table 1 above, the embodiment including the mesh structure according to the exemplary embodiments exhibited an overall reduced channel resistance and improved visibility compared to the comparative example of the general diamond mesh type. In the embodiments, as the electrode patterns are connected to each other in the shape of a concave polygon by the connecting electrodes in the mesh structure, the number of samples visible to the naked eye is remarkably reduced compared with a comparative example of a general diamond mesh type .

In Examples 12 and 13 in which the inclination angle exceeded 70 degrees, the transmittance decreased slightly as the density of the electrode patterns increased. In Examples 9 to 13 in which the inclination angle exceeded 50 degrees, the channel resistance slightly increased as the bending angle increased.

On the other hand, in the case of Embodiment 1 in which the inclination angle is reduced to less than 10 degrees, the degree of visibility is increased compared to other embodiments.

From the above evaluation results, it was confirmed that the visibility of the electrode pattern can be significantly improved without lowering the transmittance and channel resistance at an inclination angle of about 10 to 70 degrees, and preferably about 10 to 50 degrees.

10: electrode line 13: first electrode pattern
15: second electrode pattern 20: connecting electrode
30: convex portion 35: concave portion
100: Base layer 103: Separation layer
105: protective layer 110: unit cell
115: merging unit 120: electrode cell
130: Trace
150, 240: Touch sensing electrode structure
160: insulating layer 170: adhesive layer
180: protective film

Claims (15)

A plurality of electrode lines extending in a zigzag line shape in a first direction and arranged in a second direction intersecting with the first direction; And
And connection electrodes extending in the second direction to connect the neighboring electrode lines and form a plurality of concave polygonal patterns with the electrode lines.
The touch sensing electrode structure of claim 1, wherein the electrode lines include a first electrode pattern and a second electrode pattern that alternate with each other and are alternately repeated.
The method according to claim 2, wherein the concave polygonal pattern includes a convex portion and a concave portion defined in an intersecting region of the first electrode pattern and the second electrode pattern,
Wherein the connection electrode connects the convexities and the recesses included in the neighboring concave polygonal patterns.
The touch sensing electrode structure according to claim 2, wherein the inclination angle of the first electrode pattern or the second electrode pattern in the first direction is 10 to 70 degrees,
5. The touch sensing electrode structure of claim 4, wherein the tilt angle is between 10 and 50 degrees.
The touch sensing electrode structure of claim 2, wherein the concave polygonal pattern is defined by two opposing first electrode patterns, second electrode patterns, and connection electrodes.
3. The method of claim 2, wherein the mesh structure is defined by the electrode lines and the connection electrodes,
And a plurality of unit cells formed by patterning the mesh structure.
The touch sensing electrode structure according to claim 7, wherein the unit cell has a convex polygonal structure, and the electrode cell has a concave polygonal structure.
8. The touch sensing device of claim 7, further comprising a trace electrically connected to the electrode cell,
10. The touch sensing electrode structure of claim 9, wherein the trace comprises a portion of the electrode lines.
The touch sensing electrode structure according to claim 10, wherein the first electrode pattern and the second electrode pattern included in the trace have the same length and inclination angle as the first electrode pattern and the second electrode pattern included in the electrode cell.
The touch sensing electrode structure of claim 1, wherein the electrode line and the connection electrode comprise the same metal wire.
A touch sensor comprising the touch sensing electrode structure of any one of claims 1 to 12.
14. The touch sensor according to claim 13, wherein the touch sensor is a self-capacitance type.
An image display device comprising the touch sensing electrode structure of any one of claims 1 to 12.

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