KR101357589B1 - Touch-window - Google Patents

Abstract

The present invention relates to a touch window, wherein the touch window is patterned on a base substrate bonded to one surface of the transparent window via an adhesive material layer, one surface of the base substrate and the other surface opposite to the one surface. A first and second sensing electrode pattern, including a wiring portion connected to the first and second sensing electrode pattern, characterized in that it comprises a conductive tape for electrically connecting the connection pad which is the end of the wiring portion.
According to the present invention, by using a conductive tape in the structure of PET having an ITO electrode pattern on both sides, FPCB can be bonded on one side, thereby shortening the manufacturing process and improving mass productivity.

Description

Touch Window {Touch-window}

The present invention relates to a structure that can simplify the manufacturing process of the touch window.

FIGS. 1 and 2 show the main components of the capacitive touch panel. FIG. 1 shows a plan view of an adhesive structure of such a multilayer structure, and FIG. 2 is a conceptual view for explaining the cross-sectional structure of the laminated structure of FIG.

Referring to the drawings, the touch panel includes an upper OCA 50 under the transparent window W, and an upper electrode layer ITO 40 and a lower electrode layer on both sides of the PET substrate 30 thereunder. 20) is formed. In the structure in which the double-sided ITO electrode is formed, the lower OCA 10 is disposed, and the lower OCA 10 is bonded to the lower liquid crystal panel 60. The touch screen panel (TSP) formed by the bonding of these various layers may include the upper OCA 50, the upper electrode layer 40, the lower electrode layer 20, and the lower OCA 10 for bonding with the FPCB module. Cutting is provided to the bonding area (C) to expose the connection pad (P1, P2).

In particular, the structure illustrated in FIG. 2 is a structure in which ITO electrodes are formed on both surfaces of the PET substrate 30, and when the FPCB is bonded to the connection pads P1 and P2 described above, both surfaces of the touch screen panel TSP are formed. Bonding is performed on both bonding pads Q1 and Q2 of the FPCB through ACF bonding. Such a bonding method deteriorates the bonding using the ACF twice, resulting in a decrease in mass productivity and a problem in that the bonding leads to poor bonding.

The present invention has been made to solve the above-described problems, an object of the present invention is to enable the bonding of the FPCB on one side by using a conductive tape in the structure of PET having an ITO electrode pattern on both sides, manufacturing process To provide a touch window that can shorten and improve the mass production.

As a means for solving the above problems, the present invention is a base substrate bonded to one surface of the transparent window via an adhesive material layer, and the first and the patterned on one surface of the base substrate and the other surface opposite to one surface; A second sensing electrode pattern; And a wire part connected to the first and second sensing electrode patterns, and a conductive tape electrically connecting the connection pads, which are terminal ends of the wire part, to provide a touch window.

The touch window may include a connection pad including first and second pads formed on one surface and the other surface of the base substrate, and the conductive tape may be connected to any one of the first pad and the second pad. The flexible circuit board (FPCB) to be coupled to further comprise.

The conductive tape may include a conductive base film, a conductive adhesive layer having an adhesive component on one surface of the conductive substrate film, and a conductive powder filled in the conductive adhesive layer and having a conductive component.

In addition, the conductive powder may be configured to contain at least one of conductive carbon and nickel.

The first sensing electrode pattern or the second sensing electrode pattern may be partially overlapped with each other, and either one of the first sensing electrode pattern and the second sensing electrode pattern may have a curvature pattern having a periodicity. Do it.

In addition, the curvature pattern having the periodicity allows the linear sensing electrode pattern to be disposed between the nth curvature and the (n + 1) th curvature.

In addition, the first sensing electrode pattern layer or the second sensing electrode pattern layer, each unit sensing electrode is formed in a mesh structure, the mesh structure, the outer line pattern to form an outer portion of the unit pattern; and the outside And an internal line pattern connecting the inside of the line pattern in a cross structure.

In addition, the sensing electrode and the wiring part of the first and second sensing electrode pattern layers may be formed of the same material.

In addition, the sensing electrode and the wiring portion may be formed of a conductive material.

According to the present invention, by using a conductive tape in the structure of PET having an ITO electrode pattern on both sides, FPCB can be bonded on one side, thereby shortening the manufacturing process and improving mass productivity.

1 and 2 are a plan view showing a structure of a conventional touch window and a conceptual diagram showing a connection structure of a conventional connection pad and an FPCB.
3 is a conceptual diagram illustrating a connection structure between a connection pad and an FPCB according to the present invention.
Figure 4 is an embodiment showing the structure of the conductive tape.
5 and 6 illustrate various embodiments of the sensing electrode pattern according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

3 illustrates a cross-sectional conceptual view of a touch window according to the present invention.

Referring to the drawings, the touch window according to the present invention has the same configuration as most of the above-described configuration in FIG. 2, but there is a difference in that a conductive tape is used as a coupling structure for connecting pads connecting FPCBs.

Specifically, the touch window according to the present invention is a base substrate 30 which is bonded to one surface of the transparent window (w) via the adhesive material layer 50, and one surface and one surface of the base substrate 30 A first sensing electrode pattern 40 and a second sensing electrode pattern 20 that are patterned on opposite surfaces, and a wiring part (not shown) connected to the first and second sensing electrode patterns. It comprises a conductive tape 200 for electrically connecting the connection pad (P1 ', P2') which is the end.

That is, the sensing electrode patterns are formed on both sides of the base substrate 30, and the connection pads P1 ′ and P2 ′, which are terminal ends of the wiring part connected to the sensing electrode pattern, are connected with the conductive tape 200. One of (P1 ', P2') can be provided with a cross-sectional connection structure to which the bonding pads Q1 of the FPCB are connected. Therefore, in the conventional structure of FIG. 2, ACF bonding of two bonding pads of the FPCB to two places eliminates the problem of degradation in productivity and alignment, which occurred, and a reliable connection structure without defects of the array in a very simple and simple process. Can be implemented.

4 is a cross-sectional view showing a structure as an embodiment of the conductive tape described above in FIG.

The conductive tape used in the present invention may be applied to a conductive tape of various structures, as shown in Figure 4, for example, the conductive base film 210 and the adhesive component on one surface of the conductive base film 210 It may be implemented in a structure including a conductive adhesive layer (230, 240) having and a conductive powder (N) having a conductive component is filled in the conductive adhesive layer. The conductive powder may contain at least one of conductive carbon and nickel.

The conductive adhesive layer 220 may be made of a conductive polymer to impart conductivity. It may be configured to further include a pressure-sensitive adhesive to give it. Polyaniline, polypyrrole, polythiophene, or the like may be used as the conductive polymer for imparting conductivity to the conductive adhesive layer. In addition, all conductive polymers having derivatives such as polyaniline, polypyrrole, polythiophene, derivatives thereof, and the like can be used. Silicone-based, acrylic, epoxy-based, urethane-based or the like can be used as the pressure-sensitive adhesive.

Conductive tape applied to the touch window according to the present invention has a total thickness of 40㎛ ~ 60㎛ range, adhesive strength () (gf / 25mm) is 1000 (min), surface resistance (Surface Resistivity) is up to 0.5 (Ω / □) or below, contact resistance (Ω / 25mm²) can be used with 0.1 max.

5 may be implemented in a structure in which the shape of the sensing electrode pattern of the touch window itself is different from the structure implemented by cross-sectional ACF bonding of the touch window according to the present invention.

That is, the structure of the sensing electrode pattern, the base substrate 30 described in FIG. 3 is formed of a substrate such as PET, and the sensing electrode pattern is implemented on both sides of the base substrate, as shown in FIG. And when the second sensing electrode pattern is implemented to overlap, in particular any one of the sensing electrode pattern is formed with a curvature pattern, that is, a curvature having a certain periodicity. For example, as illustrated in FIG. 3, the first sensing electrode pattern Tx1 may have a curvature pattern having a certain periodicity, and the second sensing electrode patterns Rx1 formed to be spaced apart may be formed in a straight line. Accordingly, in the structure of FIG. 3, each of the first sensing electrode patterns 40 and the second sensing electrode patterns 20 are formed on both surfaces of the base substrate 30 and spaced apart from each other. The pattern 40 is a structure that forms a curvature pattern, and the second sensing electrode pattern 20 is formed in a straight line, and the overlapping regions (Q2 in FIG. 3) are not rectangular or square, and are formed in a rectangular shape. Make it wider.

In the present invention, the curvature pattern is defined as including all non-linear patterns having a predetermined periodicity and having a floor and a bony shape. Particularly preferably, as shown in Figure 5, the floor and the valley (S1, S2, S3) may be provided with a sine-type curvature or cosine-shaped curvature pattern is periodically repeated, in addition to this structure, the zigzag straight bending It may be formed in a structure that is repeated periodically. A and B segments of FIG. 5 are imaginary segments passing through the vertices and valleys of each curvature pattern.

In particular, it is preferable that the curvature pattern having the periodicity is formed such that a linear sensing electrode pattern is disposed between the n-th curvature portion and the (n + 1) -th curvature portion, where n is a natural number of 1 or more. That is, referring to the structure shown in FIG. 5, a straight second sensing electrode pattern Rx1 is disposed between the first curvature S1 and the second curvature S2 of the first sensing electrode pattern Tx1. This is preferred. Of course, in the present embodiment, the first sensing electrode pattern is a curvature pattern. Alternatively, the first sensing electrode pattern may be a linear pattern, and the second sensing electrode pattern may be a curvature pattern. In addition, the angles? ₁ and? _{2 at} which the first sensing electrode pattern Tx1 and the second sensing electrode pattern Rx1 overlap can be formed at an acute angle or an obtuse angle instead of the right angle.

Particularly preferably, when the curvature pattern according to the present invention has periodicity of a sine or cosine type, the second sensing electrode pattern crosses the first curvature portion and the second curvature portion, that is, the inflection point, . This arrangement maximizes the crossing area Q2 to improve the touch sensing efficiency, and also has the effect of improving the visibility by forming the optical characteristic more transparent than the arrangement of the conventional orthogonal structure. 7, the first and second adhesive insulating layers may be OCA films, and the first and second sensing electrode pattern layers may be formed of indium-tin oxide (ITO), IZO indium zinc oxide (ZnO), or zinc oxide (ZnO).

Alternatively, unlike the above-described structure, a wiring portion for connecting the second and first sensing electrode patterns, respectively, is formed on both sides of the base substrate, and the conductive material such as Ag, Al, Cu, etc. is not used. The process of simultaneously forming the wiring part and the sensing electrode pattern may be used. This is because the shape of the pattern can be seen when the pattern of the electrode is formed using the ITO material, the manufacturing cost is increased due to the expensive ITO material and the film hardness of the ITO material is lowered, Layer structure, it is possible to reduce manufacturing cost by lowering the manufacturing cost through the process of forming an effective portion and a wiring portion simultaneously by forming and patterning a conductive material on an optical substrate instead of an ITO material, There is also an effect of providing a process capable of realizing various degrees of freedom of design without receiving it.

As shown in FIG. 6, in the structure of the touch window according to the present invention, which is implemented by FPCB and cross-section ACF bonding, the sensing electrode pattern may be formed as a structure implementing a touch sensor module having a mesh structure.

That is, as shown in Figure 6, the sensing electrode pattern is characterized in that one pattern of the sensing electrode pattern, that is, the unit pattern is formed in a mesh structure. The 'mesh structure' in the present embodiment is defined as a structure including an outer line pattern M1 forming an outer portion of the unit pattern and an inner line pattern M2 connecting the inner portion of the outer line pattern in an intersecting structure. In particular, the outer line pattern M1 may be formed in various shapes such as a circular shape and an elliptic shape in addition to the polygonal structure, and may be formed of a conductive material in a line shape.

In addition, the inner line pattern M may be formed as a set of lines connecting the outer line pattern M2 internally in a cross structure, as shown in the figure. That is, a plurality of patterns of a linear structure may be formed so as to intersect with each other to form a network structure. Of course, not only a linear structure but also various curved structures can be applied. The sensing electrode of the mesh structure according to the present invention is formed into a polygonal mesh shape with a line extending from a conductive material having a thickness of 3 占 퐉 to 10 占 퐉 so that an electric signal can be transmitted.

 In this case, the efficiency of signal transmission can be greatly improved by controlling the crossing angle and controlling the line width in the crossing structure of the internal pattern line M2 forming the mesh structure.

In addition, since the process of simultaneously fabricating the wiring part and the sensing electrode pattern using the same material is performed, not only the efficiency of the process can be improved, but also the ITO material is not used, and the process cost can be greatly reduced. Therefore, the efficiency of the signal transmission from the reduction of the material cost and the process ratio is promoted to the mesh structure, thereby realizing the high efficiency product. The conductive material used for the sensing electrode and the wiring used in the present invention may be various materials such as Ag, Cu, and Al.

That is, in the present exemplary embodiment, the wiring part connecting the second and first sensing electrode patterns, respectively, is not formed using the transparent electrode material, and the wiring part is formed using a conductive material such as Ag, Al, Cu, or the like. It is also possible to use a process of simultaneously forming the sensing electrode pattern. The pattern shape of the electrode can be seen by using the ITO material, and the manufacturing cost increases because the ITO material is an expensive material, and the double-sided ITO material on one single base substrate due to the decrease in the film hardness of the ITO material. Solving the manufacturing problem that is difficult to realize the structure having a layer, instead of the ITO material, the conductive material is formed and patterned on the optical base to form the effective part and the wiring part at the same time, thereby reducing the manufacturing cost and reducing the film hardness. It also has the effect of providing a process that can realize various degrees of freedom of design.

The touch window according to the present invention can be attached to various display devices. That is, the display device may be not only a liquid crystal display but also an organic light emitting display device, a plasma display panel, or the like. At this time, in order to prevent a noise component generated by the driving of the display device or the like from being transmitted to the touch sensor module, that is, a touch screen panel (TSP), to cause malfunction of the touch sensor panel, A shield layer may be disposed between the devices.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

10: adhesive material layer (OCA)
20: second sensing electrode pattern
30: base substrate
40: first sensing electrode pattern
50: adhesive material layer (OCA)
200: conductive tape
210: conductive capacitor film
220, 230: conductive adhesive layer

Claims (10)

A base substrate;
A first wiring part connected to the first sensing electrode pattern formed on the base substrate and formed on one surface of the base substrate;
A second wiring part connected to the second sensing electrode pattern formed on the base substrate and formed on the other surface of the base substrate;
A conductive tape disposed on the one surface and the other surface of the base substrate to electrically connect the second wiring part to the one surface side;
A flexible printed circuit board (FPCB) connected to the conductive tape only on one side of the one side and the other side of the base substrate;
/ RTI >
The method according to claim 1,
The conductive tape,
A touch window extending from the one surface to the other surface along the side surface of the base substrate.
The method according to claim 1,
The conductive tape,
A touch window comprising a conductive adhesive layer having an adhesive component on one surface of the conductive substrate film and the conductive substrate film.
The method according to claim 3,
The conductive tape,
The touch window filled with the conductive adhesive layer further comprises a conductive powder having a conductive component.
The method of claim 4,
The conductive powder is a touch window containing at least one of conductive carbon and nickel.
The method according to claim 1 or 2,
The first sensing electrode pattern or the second sensing electrode pattern,
Some of them are placed so that they overlap each other.
Any one of the first sensing electrode pattern or the second sensing electrode pattern has a curvature pattern having a periodicity.
The method of claim 6,
The curvature pattern having the periodicity may include:
And a linear sensing electrode pattern is disposed between the n-th curvature portion and the (n + 1) -th curvature portion.
The method according to claim 1 or 2,
The first sensing electrode pattern or the second sensing electrode pattern,
Each unit sensing electrode is formed in a mesh structure,
The mesh structure may include:
An outer line pattern forming an outer portion of the unit sensing electrode;
And an inner line pattern connecting the inside of the outer line pattern in an intersecting structure.
The method according to claim 1 or 2,
The touch window of which the sensing electrodes of the first and second sensing electrode patterns and the first and second wiring parts are formed of the same material.
The method of claim 9,
And the first and second sensing electrode patterns and the first and second wiring portions are made of a conductive material.

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