KR101174710B1 - Touch panel sensor - Google Patents

Abstract

PURPOSE: A touch panel sensor which forms a window decoration and an electrode pattern on the same surface is provided to form a window decoration and an electrode pattern on the same surface and to simplify electric connection between the electrode pattern and the window decoration. CONSTITUTION: Electrode patterns(112a-112c) are formed on the bottom of an insulating substrate. A window decoration(120) covers the electrode pattern on the bottom of the insulating substrate. A wire member(170) is formed on the top of the window decoration and electrically connects the electrode pattern and an external device. The wire member receives a signal through window decoration.

Description

Touch Panel Sensor {TOUCH PANEL SENSOR}

The present invention relates to a touch panel sensor, and more particularly, to a touch panel sensor for detecting a contact position of an object.

1 is a perspective view illustrating a conventional capacitive touch panel sensor.

Referring to FIG. 1, the conventional touch panel sensor 1 is bonded to the lower insulating sheet 10 and the upper insulating sheet 20 at predetermined intervals. On the opposite surfaces of the lower insulating sheet 10 and the upper insulating sheet 20, the lower ITO electrode 30 and the upper ITO electrode 40 are arranged perpendicular to each other.

In order to electrically connect the upper ITO electrode 40 and the terminal 52 of the flexible circuit board 50, a metal wire 48 extends from the end of the upper ITO electrode 40 to the lower portion of the upper insulating sheet 20. The lower ITO electrode 20 is also electrically connected to the circuit board 50 by a separate metal wire 38.

However, the metal wires 38 and 48 are shiny with metallic luster and may not be visually seen from the upper part of the transparent upper insulating sheet 20 because light does not pass through. Accordingly, in order to prevent the metal wires 38 and 48 and the circuit board 50 from being visible, a non-transmissive window decoration 65 is formed on the bottom of the reinforcing substrate 60 using transparent glass or reinforced plastic, and the reinforcing substrate is formed. 60 is disposed on the upper insulating sheet 20.

However, the thickness of the touch panel sensor 1 is increased by the reinforcing substrate 60, which may reduce the transparency and clarity of the touch panel sensor 1, and reduce the sensitivity of the touch panel sensor.

In addition, since the optical clearness adhesive layer is interposed between the reinforcing substrate 60, the upper insulating sheet 20, and the lower insulating sheet 10, the thickness of the touch panel sensor 1 itself may be increased. In addition, the defect occurrence rate may increase during the adhesion process, and may reduce the light transmittance or clarity as a whole.

In order to solve this problem, a technique of forming an upper ITO electrode and a window decoration on the same surface, forming a through hole in the window decoration, and forming a colored conductive layer therein is disclosed in Korean Patent No. 10-1013037. However, since the colored conductive layer and the window decoration are separately formed, it is difficult to form the colors of both elements in the same manner, and if the color control is a little failed, the position of the colored conductive layer may be apparent.

The present invention provides a touch panel sensor that can facilitate the electrical connection structure between a transparent electrode pattern or an opaque electrode pattern and an external device.

The present invention provides an electrode pattern and a window decoration on the same surface, but provides a touch panel sensor that can be connected to each other without forming a through hole in the window decoration.

The present invention provides a touch panel sensor that can be expected to reduce the number of laminated layers of the touch panel sensor, such as the improvement of optical characteristics, reduced defect rate, weight reduction, cost reduction.

The present invention provides a touch panel sensor having an electrode pattern structure and a decoration structure having excellent electrical characteristics.

According to an exemplary embodiment of the present invention, the touch panel sensor for detecting the contact position of the object to be delivered to the external device, the electrode pattern formed on the bottom surface of the insulating substrate, the bottom surface of the insulating substrate of the electrode pattern A window decoration formed to partially cover an end portion and provided with a conductive material, and a wire member formed on an upper portion of the window decoration to electrically connect each electrode pattern and an external device. The wire member may exclusively transmit and receive signals to the end of the corresponding electrode pattern up and down by using the electrode pattern end corresponding to the up and down and the resistance to be formed is considerably less than the resistance formed to the other electrode pattern end around the edge. have.

In general, a transparent or opaque electrode pattern applied to an insulating substrate is used to detect a contact position of an object, which may be formed in a capacitive method or a resistive film method.

In general, since the ITO transparent electrode pattern is formed to a thickness of about 0.1㎛, while the window decoration is formed to a thickness of about 2 ~ 3㎛, it was difficult to form the ITO electrode pattern together on the substrate on which the window decoration is formed. An ITO transparent electrode pattern and window decoration are formed on a separate substrate or on a separate surface. For reference, when the ITO electrode pattern is formed on the same surface of the substrate on which the window decoration is formed, the ITO electrode pattern may be frequently broken or cut off at the boundary of the window decoration.

However, according to the present invention, a window decoration having a relatively high resistance but using conductivity is used, and the window decoration does not electrically connect all the electrode patterns but has a relatively high resistance, so that the wires corresponding or matching up and down The terminal of the member and the end of the electrode pattern can be connected exclusively. Exclusive in this specification means that the corresponding terminals or electrodes exchange signals with each other, and even if there is some noise, it will also include transmitting and receiving signals (communicate) so that the overall signal transmission is not unreasonable.

However, since the window decoration is conductive, a decor insulation layer may be further formed thereon for electrical separation from the wire member. The decor insulating layer may be formed of an insulating material made of non-conductive ink according to the color implemented in the window decoration, or may be provided by laminating a separate insulating or reflective film or applying an insulating paint.

Here, the wire member may be a metal line pattern formed on the window decoration, and they may be manufactured by silk screen, gravure printing, or the like using an existing silver paste. Alternatively, the process may be performed through metal deposition and etching. It can be formed by various methods, such as printing and inkjet printing.

In addition, the wire member may not be directly formed on the window decoration, but may indirectly connect the necessary electrical terminals by using the flexible circuit board.

The touch panel sensor of the present invention can improve the conductive structure of the touch panel sensor through the use of the window decoration area, and it is possible to form an electrode pattern directly on the bottom surface of the tempered glass substrate or the transparent resin substrate.

In addition, although the window decoration and the electrode pattern are formed on the same surface, the electrical connection between the electrode pattern and the window decoration is simple, and even if the through hole is not formed in the window decoration, the connection structure can be made invisible externally.

The transparent electrode pattern may be formed using materials such as ITO, AZO, IZO, and CNT in the central area where the display is located, but the electrode pattern may be formed using a fine metal pattern having a width of 0 to 30 μm.

The touch panel sensor of the present invention can be expected to reduce the number of laminated layers of the touch panel sensor, such as optical characteristics, reduced defect rate, weight reduction, cost reduction.

The touch panel sensor of the present invention can provide an electrode pattern structure and a decoration structure having excellent electrical characteristics.

1 is an exploded perspective view illustrating a conventional capacitive touch panel sensor.
2 is an exploded perspective view of a touch panel sensor according to an exemplary embodiment of the present invention.
3 is an enlarged cross-sectional view illustrating a connection relationship between an electrode pattern and a wire member in the touch panel sensor of FIG. 2.
4 is an exploded cross-sectional view illustrating the formation of the connection relationship of FIG. 3.
5 is a bottom view illustrating a touch panel sensor according to an exemplary embodiment of the present invention.
6 is a partially enlarged perspective view illustrating the transparent connection pattern of FIG. 5.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. For reference, the same numbers in this description refer to substantially the same elements and can be described with reference to the contents described in the other drawings under these rules, and the contents which are judged to be obvious to the person skilled in the art or repeated can be omitted.

2 is an exploded perspective view of a touch panel sensor according to an embodiment of the present invention, FIG. 3 is an exploded perspective view for explaining the upper sheet structure of FIG. 2, and FIG. 4 is a connection relationship between the electrode pattern and the wire member of FIG. 3. It is sectional drawing for demonstrating formation.

2 to 4, the touch panel sensor 100 includes an upper sheet 110, a lower sheet 130, and an optical adhesive layer 150.

The upper sheet 110 includes an upper insulating substrate 111 and an upper electrode pattern 112, and the lower sheet 130 includes a lower insulating substrate 131 and a lower transparent electrode pattern 132.

The upper insulating substrate 111 is a material having a high surface strength and may be manufactured using a glass material or other plastic material that transmits light such as glass material and has excellent surface strength, and likewise, the upper electrode in the lower sheet 130 The lower insulating substrate 131 on which the lower transparent electrode pattern 132 interacting with the pattern 112 is disposed may also be made of the same material as the upper insulating substrate 111.

Of course, when forming the upper sheet according to the resistive film method, the upper insulating substrate may be formed using a plastic film. In any case, when the plastic film is used as the insulating substrate, the insulating substrate may be provided as a plate-like film or a roll-type film, and may be formed by a method such as gravure printing or film laminating on the insulating substrate. For example, the upper insulating substrate 111 may be made of plastic such as polyethylene, polypropylene, acryl, and polyethylene terephthalate (PET) through which light passes, such as glass or glass. It can be manufactured, and is not limited to the material of the insulating substrate.

The upper electrode pattern 112 is indium tin oxide (ITO) or indium zinc oxide (IZO), al-doped tin oxide (ATO), al-doped zinc oxide (AZO), and carbon nanotube (CNT) having both transparency and conductivity. ) And the like. Since the upper electrode pattern 112 is formed of a transparent conductive material from the outside, it is not visible from the outside, and the organic light emitting diode and liquid crystal display device disposed under the touch panel sensor. ) And an image of a display such as a plasma display panel can be exposed.

Of course, in some cases, the upper electrode pattern 112 may use an opaque conductive material. For example, various metals such as gold, silver, aluminum, alloys thereof, and the like having a resistance coefficient smaller than that of ITO and IZO can be used. However, when an opaque conductive material is used as the material of the electrode pattern, it should be provided thin enough to expose the image of the display. Specifically, when the width of the electrode pattern formed of a metal material is greater than 0 and 30 μm or less, it may not be visually confirmed. Recently, it is possible to thin the thickness of the pattern to several nm through nanoimprinting fixing or the like.

Referring to the drawings again, the upper sheet is provided with a central region in which the upper electrode pattern 112 and the transparent window are formed, and a window decoration region is formed in the peripheral region around the central region.

An upper electrode pattern 112 and a lower transparent electrode pattern 132 are formed on the bottom surface of the upper insulating substrate 111 and the upper surface of the lower insulating substrate 131 to interact with each other to detect an object. The upper electrode pattern 112 or the lower transparent electrode pattern 132 may use ITO or IZO having both light transmittance and conductivity. Therefore, the light emitted from the display such as the organic light emitting device, the liquid crystal display, and the plasma display panel, which is not visible from the outside and may be disposed at the bottom of the touch panel sensor 100, may be passed.

In this case, the lower insulating substrate 131 may also use materials such as plastic and glass such as polyethylene, polypropylene, acrylic, polyethylene terephthalate (PET), and the like.

An optical adhesive layer may be provided between the upper sheet 110 and the lower sheet 130 to form a transparent coating layer. The optical adhesive layer 150 may be provided in the form of an OCA film, and may be provided while being covered with the protective film 152. As will be described later, if the position of the object can be detected only by the electrode pattern of the bottom of the upper sheet 110, it is possible to provide only the protective film or the protective layer on the bottom of the top sheet without the photosynthesis adhesive layer or the bottom sheet.

The optical adhesive layer 150 may be made of a non-conductive material, and the upper electrode pattern 112 and the lower transparent electrode pattern 132 may be physically bonded and electrically separated by the optical adhesive layer 150. As described above, the optical adhesive layer 150 bonds the upper sheet 110 and the lower sheet 130 by using an optical adhesive film or an optically clear adhesive (OCA) film, and transmits light well to provide excellent optical properties. Do.

Referring to FIG. 2, an upper electrode pattern 112 is formed on the insulating substrate 111, and a window decoration 120 may be provided thereon. The window decoration 120 may be provided by the above-described various methods. For example, the window decoration 120 may be provided by mixing carbon powder and non-conductive black ink at about 20:80 to express black, and may include silk screen, gravure printing, and the like. It can be formed to a thickness of about 2 ~ 3㎛ in various ways. In addition, the decor insulation layer 125 formed of 100% non-conductive black ink may be formed on the window decoration 120. The deco insulating layer 125 includes a through hole 127 formed corresponding to the end position of the electrode pattern 112, and the through hole 127 is formed such that an end of the electrode pattern 112 and an end of the wire member are vertically aligned with each other. It can be formed in an adjusted position. The through hole 127 may be provided in the form of a hole or a groove at the position.

The window decoration 120 may mix carbon or the like to implement black, but in some cases, non-conductive inks of different colors may be mixed to implement other colors other than black. ATO. Various conductive materials such as ITO, PEDOT, metal powder, carbon fiber, nanosilver and the like may be used.

The window decoration 120 may be provided in various ways in addition to mixing the conductive material and the non-conductive ink. For example, it may be formed using a high resistance thin film formed of a material having a high resistance coefficient, and the material having a high resistance coefficient may be formed of an oxide such as black chromium oxide in a thin film form, and may be formed of a conductive polymer or conductive material such as polyaniline or phthalocyanine. Some organic substances may be formed in a thin film form.

As illustrated in FIGS. 3 and 4, the upper electrode pattern 112 may be connected to the flexible circuit board 160 through a wire pattern 170 formed on the bottom surface of the window decoration 120. The window decoration 120 corresponds to a peripheral area and functions to visually block the wire pattern 170 formed with silver paste or the like.

Here, by mixing the carbon powder to about 25%, preferably about 20% or less, the window decoration 120 has a relatively high resistance, and is exclusive between the electrode pattern 112b and the wire pattern 170 spaced from about 2 to 3 μm. Phosphorus communication can be performed, but normal communication cannot be performed with other electrode patterns 112a and 112c separated by 200 mu m or more in the vicinity thereof.

For example, when a small amount of carbon powder and a relatively large amount of nonconductive black ink are mixed, the resistivity of the conductive paint may be about 1 billion times higher than that of aluminum. If the high-resistance conductive ink is used in an area of about 1 mm x 1 mm and is about 4 μm thick, the resistance in the vertical direction is about 40 Ω, which is lower than that of the actual ITO transparent electrode.

However, if the same high-resistance conductive ink is arranged side by side rather than in an up-and-down structure, and it is assumed to be about 1 cm apart, it can be seen that the resistance is significantly increased. For example, if the window decoration is formed to a thickness of about 4㎛, and the area between the electrodes is about 1cm x 1cm apart, the resistance in the lateral direction is about 2.5MΩ, 60,000 times more than the vertical resistance of about 40Ω The resistance value comes out.

In fact, the upper and lower adjacent wire patterns in the structure between the window decoration 120 and the ITO material wire pattern 170 and the metal electrode pattern 112b in which the carbon and the non-conductive black ink are mixed at 20:80 as described above. The resistance between the 170 and the electrode pattern 112b is measured about 10 to 1000 ohms, while the resistance between the laterally adjacent wire pattern 170 and the surrounding electrode patterns 112a and 112c is measured between about 10 MΩ to 100 MΩ or 100 MΩ. The abnormality can be measured.

The wire pattern 170 and the electrode pattern 112 may be electrically connected to each other through the conductive window decoration 120. On the other hand, the insulating layer 125 is formed on the upper surface of the window decoration 120 to prevent the signals of the electrode pattern from being energized to each other outside the designated position by the wire pattern 170.

In this embodiment, the upper electrode pattern is formed in a single line shape, but in some cases, a plurality of straight lines, curved lines, and wave-shaped lines are formed in parallel to each other to form a group, and among the ends of the grouped parallel lines. One may be provided in electrical connection.

5 is a bottom view illustrating a touch panel sensor according to an exemplary embodiment of the present invention, and FIG. 6 is a partially enlarged perspective view illustrating the electrode connection structure of FIG. 5.

For reference, the optical adhesive layer is not shown in FIGS. 5 and 6, and as described above, the transparent coating layer may be formed using an optical adhesive layer, a UV transparent hardener, or the like.

5 and 6, the touch panel sensor according to the present embodiment includes an insulating substrate 210, a first transparent electrode pattern 220 and a second transparent electrode pattern 230 formed on the insulating substrate 210. The insulating pattern 240 is interposed between the first transparent electrode pattern 220 and the second transparent electrode pattern 230.

The insulating substrate 210 may be formed of a synthetic resin film such as transparent PET, PC, PE, or tempered glass substrate. The first transparent electrode pattern 220 and the second transparent electrode pattern 230 are formed on the bottom surface of the insulating substrate 210.

The first transparent electrode pattern 220 may be formed using a transparent conductive material, and is provided by a series of line patterns arranged side by side in the horizontal or vertical direction on the insulating substrate 210. In detail, the line pattern for the first transparent electrode pattern 220 includes an extension part 222 and a bridge part 224 provided in a line along one direction. The expansion part 222 and the bridge part 224 are alternately formed and arranged in a row, and may be formed of the same or different transparent conductive materials.

The extension portion 222 is formed to be relatively or significantly wider than the bridge portion 224, and the bridge portion 224 is formed between the extension portions 222 to electrically connect the series of extension portions 222. There is a number.

The shape of the extension portion 222 and the bridge portion 224, as shown in the figure may be formed of a continuous square motif, the shape may be a variety of motifs such as rhombus, circle or oval. In addition, the extension part 222 and the bridge part 224 may be formed on the same material and the same surface together with the transparent connection part 236 for the second transparent electrode pattern 230, and may be spaced apart from each other with a minimum width. It can be chosen to be in harmony.

The second transparent electrode pattern 230 is formed to form a stacked structure with the first transparent electrode pattern 220. The second transparent electrode pattern 230 may be formed above or below the first transparent electrode pattern 220 and is electrically separated from the first transparent electrode pattern 220. To this end, an insulating pattern 240 may be formed between the first transparent electrode pattern 220 and the second transparent electrode pattern 230. The insulating pattern 240 may be generally formed using a material such as SiO ₂ , Si ₃ N _4, or TiO ₂ forming an insulating thin film.

The second transparent electrode pattern 230 includes a transparent connector 236. As illustrated in FIG. 6, the transparent connector 236 may be formed at the same time as the first transparent electrode pattern 220. The transparent connection part 236 may also be formed of a transparent conductive material having a width of about 0.1 mm to 0.2 mm, and the expansion part 222 and the bridge part after etching the ITO layer formed on the insulating substrate 210 through a photolithography process. 224 can be formed together.

The second transparent electrode pattern 230 may further include a low resistance line 234 in addition to the transparent connection portion 236. The low resistance line 234 may be formed on the insulating pattern 240, and is formed to electrically connect the entire series of transparent connectors 236 while passing through the surfaces of the plurality of transparent connectors 236. The low resistance line 234 may be formed using a metal material such as gold, silver, aluminum, or chromium, and may be simultaneously formed with the wire pattern 270 to be described later. These metal patterns may be formed by forming a metal thin film layer in a single layer or a multi-layer on the insulating substrate 210 on which the electrode patterns 220 and 230 are formed, and etching them according to a predetermined low resistance line 234 and a wire pattern 270. There is a number. In this case, after deposition or sputtering, it may be formed through a patterning process such as nanoimprinting, or may be simply formed through a process such as inkjet printing.

The low resistance line 234 may not be transparent and may optically block the display, but may be formed to a width of about 30 μm or less, preferably 3 μm or less, and the fine pattern of the width may be invisible to the naked eye. .

As the metal, various materials such as aluminum, copper, gold, silver, nickel, and chromium may be used. For example, for aluminum, the resistivity (ρ) is considerably low, about 2.82 * 10 ^-6 Ωcm. If it is assumed that such aluminum low resistance line 234 is formed with a width of about 1 μm, a height of 0.1 μm, and a length of about 10 cm, then the resistance can be calculated as follows.

If the ITO electrode pattern is 100 µm and 10 cm in length under similar conditions, the resistance of the ITO electrode pattern can be calculated. Since the sheet resistance of ITO is basically 2 to 300 Ω / square and is currently technically 150 Ω / square, the resistance of the ITO electrode pattern can be calculated as follows.

That is, when formed with the same length of 10cm, and formed to be invisible, it can be seen that the line of aluminum has a significantly lower resistance than the ITO pattern of the same length. In a similar example, since the specific resistance of chromium (Cr) is about 1.27 * 10 ^-5 Ωcm, it can be seen that it is significantly lower than the ITO electrode pattern at about 12.7kΩ under the same conditions as aluminum.

On the other hand, both ends of the first transparent electrode pattern 220 may be formed to partially overlap the window decoration 250, the wire pattern 270 through the through hole 257 of the decor insulating layer 255 in the overlapped portion ) Is electrically connected. For reference, the low resistance line 234 formed on the second transparent electrode pattern 230 may be directly connected to the wire pattern 270 without distinction, and the connection between the low resistance line 234 and the wire pattern 270 may be smoothly performed. The transparent connection pattern 280 may be formed using a conductive or nonconductive transparent ink.

In the present embodiment, the wire pattern 270 constituting the wire member is formed on the window decoration 250, but in some cases is not formed directly on the window decoration 250, but indirectly formed through a flexible circuit board, etc. Can be.

An end portion of the wire pattern 270 may be provided with a connection portion 274 having a relatively large area, and through the connection portion 274, the wire pattern 270 may be connected to another flexible circuit board or other electrical circuit for connection with an external device. It can be connected to the connection terminal.

Two electrode patterns may be formed on the bottom of one tempered glass substrate using the first and second transparent electrode patterns 220 and 230, and there is no need to overlap separate electrode sheets. Of course, all of the electrode patterns may be formed on one surface, and a blocking layer coated with a grounded sheet or a conductive material may be further formed on the bottom surface.

According to the present invention, an insulating layer 255 having a through hole 257 is formed on the window decoration 250, and the electrode pattern 220 and the wire pattern 270 coincide with each other up and down at the position of the through hole 257. You can do it. Although the electrode pattern 220 and the wire pattern 270 are not directly in contact with each other, only the terminals that are vertically connected to each other through the conductive window decoration 250 may be connected exclusively. In addition, the through hole 257 may be provided in the form of a closed hole or a groove open at one side in the position.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

100: Touch panel sensor 110: Top sheet
111: upper insulating substrate 112: upper electrode pattern
113 ： metal connection pattern 120 ： window decoration
130: lower sheet 131: lower insulating substrate

Claims (15)

In the touch panel sensor for detecting the contact position of the object to be delivered to the external device,
Insulating substrate;
An electrode pattern formed on a bottom surface of the insulating substrate;
A window decoration formed on the bottom surface of the insulating substrate to partially cover an end portion of the electrode pattern, the window decoration being made of a conductive material; And
And a wire member formed on an upper portion of the window decoration to electrically connect each of the electrode patterns and an external device.
Through the window decoration having conductivity, the wire member has the electrode pattern corresponding to the upper and lower sides using less than the resistance formed with the end of the electrode pattern corresponding to the upper and lower sides and the resistance formed with the end of the other electrode pattern. Touch panel sensor, characterized in that for communicating exclusively with the end of the (communicate). The method of claim 1,
The window decoration is provided by mixing a conductive material and a non-conductive ink, the touch panel sensor, characterized in that to adjust the overall resistance by using a composition between the conductive material and the non-conductive ink. The method of claim 2,
The window decoration is provided by mixing a carbon and a non-conductive black ink, the carbon is a touch panel sensor, characterized in that less than 25% of the paint for window decoration. The method of claim 1,
The window decoration is a touch panel sensor, characterized in that formed using a thin film containing an oxide or a conductive polymer. delete The method of claim 1,
The wire member is a touch panel sensor, characterized in that it comprises a metal wire pattern formed on the window decoration. The method of claim 1,
And a low resistance line having a lower resistance than the electrode pattern is formed on an upper surface of the electrode pattern. The method of claim 1,
The wire member includes a metal wire pattern formed on the window decoration, and a low resistance line of a metal material having less resistance than the electrode pattern is formed on an upper surface of the electrode pattern, and the metal wire pattern and the low resistance line are Touch panel sensor, characterized in that formed with the same material. delete The method of claim 1,
The insulating substrate is a touch panel sensor, characterized in that formed using glass or transparent synthetic resin. The method of claim 1,
The electrode pattern is a touch panel sensor, characterized in that provided using a transparent or opaque conductive material. The method of claim 1,
The electrode pattern is a touch panel sensor, characterized in that provided in the form of a single line or grouped parallel lines. The method of claim 1,
The electrode pattern is
A first electrode pattern including a plurality of extension parts provided in a line along one direction and a plurality of bridge parts connecting the plurality of extension parts;
A plurality of electrodes formed on the insulating substrate to be parallel to the first electrode pattern on the same surface as the first electrode pattern, electrically separated from the first electrode pattern, and formed in an area other than the extension part and the bridge part; A second electrode pattern connecting the transparent connection part to the transparent connection part and the bridge part and including a low resistance line having a smaller resistance than the transparent connection part; And
And an insulating pattern interposed between the bridge portion of the first electrode pattern and the low resistance line. The method of claim 1,
And a decor insulating layer formed on a bottom surface of the window decoration and having a through hole for partially exposing the window decoration in correspondence with an end of the electrode pattern. The method of claim 14,
The wire member includes a flexible printed circuit board stacked on the window decoration, wherein the terminal of the flexible printed circuit board is electrically connected to a bottom surface of the window decoration exposed by the through hole.

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