KR20190094990A - Touch sensor module and touch panel having the same - Google Patents

Abstract

The present invention relates to a touch sensor module to increase the touch sensitivity of a touch panel. The touch sensor module comprises: a first conductive film; a coil layer positioned on the first conductive film and having a coil; a second conductive film positioned on the coil layer; and a spacer member positioned between the coil layer and the second conductive film. The first conductive film includes a plurality of conductive film parts spaced apart from each other.

Description

TOUCH SENSOR MODULE AND TOUCH PANEL HAVING THE SAME}

The present invention relates to a touch sensor module and a touch panel having the same.

In general, a portable electronic device such as a smart phone, an MP3, or a home appliance such as a refrigerator outputs various operation states, and a touch panel for input operation such as a command by a touch operation is provided. Attached.

Accordingly, the touch panel is combined with a display device module for visually outputting information and a touch sensor module for recognizing a user's touch operation.

The display module used in such a touch panel is typically used by an organic light emitting diode (OLED) display device, particularly an active matrix organic light emitting diode (AMOLED) or liquid crystal display (liquid crystal display). do.

In addition, the touch sensor module is not only a two-dimensional touch sensing method for detecting the touch point using the coordinates of the X axis and the Y axis, but also a three-dimensional touch sensing method for additionally detecting the touch intensity applied in the Z-axis direction.

For such a three-dimensional touch sensing method, there is a problem in that the touch intensity is detected using a pressure sensor or an image sensor, but the touch intensity change is not accurately detected.

Republic of Korea Patent No. 10-1777733 (Registration date: September 06, 2017, the title of the invention: 3D touch device using an image sensor and an opaque member)

The problem to be solved by the present invention is to improve the touch sensitivity of the touch panel.

According to an aspect of the present invention, a touch sensor module includes a first conductive film, a coil layer disposed on the first conductive film, and including a coil, a second conductive film positioned on the coil layer, and the coil. A spacer disposed between the layer and the second conductive film, wherein the first conductive film includes a plurality of conductive film portions spaced apart from each other.

According to another aspect of the present invention, there is provided a touch sensor module including a first conductive layer, a coil layer disposed on the first conductive layer, and having a coil, a second conductive layer positioned on the coil layer, and the first conductive layer and the coil. And a spacer positioned between the layers, wherein the second conductive film includes a plurality of conductive film parts spaced apart from each other.

The first conductive layer may include a plurality of openings, and adjacent conductive layer portions may be spaced apart by the openings.

The plurality of conductive film portions may be arranged in a predetermined direction by a predetermined spacing interval.

The second conductive layer may include a plurality of openings, and adjacent conductive layer portions may be spaced apart from the openings.

The plurality of conductive film portions may be arranged in a predetermined direction by a predetermined spacing interval.

The coil layer may include an insulating substrate, and the coil may be spirally arranged on at least one of an upper surface and a lower surface of the insulating substrate.

According to another aspect of the present invention, a touch panel includes a first conductive film, a coil layer disposed on the first conductive film, and including a coil, a second conductive film positioned on the coil layer, the coil layer, and the second conductive film. A spacer disposed therebetween, and a display module positioned on the second conductive layer, wherein the first conductive layer includes a plurality of conductive layer portions spaced apart from each other.

According to another aspect of the present invention, a touch panel includes a first conductive film, a coil layer disposed on the first conductive film, and including a coil, a second conductive film positioned on the coil layer, the first conductive film, and the coil layer. A spacer disposed therebetween, and a display device module positioned on the second conductive layer, wherein the second conductive layer includes a plurality of conductive layer portions spaced apart from each other.

The first conductive layer may include a plurality of openings, and adjacent conductive layer portions may be spaced apart by the openings.

The plurality of conductive film portions may be arranged in a predetermined direction by a predetermined spacing interval.

The first conductive layer may include a plurality of openings, and adjacent conductive layer portions may be spaced apart by the openings.

The plurality of conductive film portions may be arranged in a predetermined direction by a predetermined spacing interval.

According to this feature, in the first conductive film and the second conductive film which are positioned at different intervals on the lower and upper portions of the coil layer where the coil is located, the conductive film having a narrow gap with the coil layer is divided into a plurality of conductive film portions. Thus, the strength of the eddy current formed in the conductive film is reduced.

As a result, the inductance of the coil is prevented from being reduced by the influence of the eddy current formed in the conductive film positioned closer to the coil layer, thereby improving the sensitivity sensitivity of the touch panel.

In addition, as the conductive layer is further positioned below the touch sensor module for the electromagnetic shielding function, reliability of the operation of the touch sensor module is improved.

1 is a conceptual cross-sectional view of a touch sensor module for explaining the operating principle of the touch sensor module according to an embodiment of the present invention.
FIG. 2 is a plan view of a coil positioned in the coil layer of FIG. 1.
3A is a diagram conceptually illustrating an eddy current formed in a touch object according to a magnetic field generated in a coil when an alternating current is applied to a coil in the touch sensor module of FIG. 1.
3B is a diagram conceptually illustrating a change in magnetic field of a coil and a change in intensity of eddy currents of a touch object when a touch object is touched according to a change in the distance between the touch object and the coil.
4 is a cross-sectional view of a touch panel according to a first embodiment of the present invention.
FIG. 5 is a diagram illustrating various examples of a plan view of the first conductive film illustrated in FIG. 4.
FIG. 6 is a plan view of the second conductive film shown in FIG. 4.
FIG. 7 is a view conceptually showing the shapes of eddy currents formed in the first and second conductive films when an alternating current is applied to the coil according to the first embodiment of the present invention, and (a) is a second conductive film. And (b) is the shape of the eddy current formed in the first conductive film.
8 is a cross-sectional view of a touch panel with a touch sensor module according to a second embodiment of the present invention.
9 is a cross-sectional view of a touch panel according to a comparative example of the present invention.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention; In describing the present invention, if it is determined that adding specific descriptions of techniques or configurations already known in the art may make the gist of the present invention unclear, some of them will be omitted from the detailed description. In addition, terms used in the present specification are terms used to properly express the embodiments of the present invention, which may vary according to related persons or customs in the art. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the phrases clearly indicate the opposite. As used herein, the meaning of “comprising” specifies a particular characteristic, region, integer, step, operation, element, and / or component, and other specific characteristics, region, integer, step, operation, element, component, and / or group. It does not exclude the presence or addition of.

Hereinafter, a touch sensor module and a touch panel having the same according to an embodiment of the present invention will be described with reference to the accompanying drawings.

First, referring to FIGS. 1 to 3B, an operation concept of an inductive force sensor, which is a touch sensor used in the touch sensor module of the present invention, is used.

An inductance force sensor is a tactile sensor that senses a pressure on a touch panel by using an inductance that changes according to a change in a gap between a spiral coil wound in a spiral and a metal film.

That is, when an alternating current is applied to the helical coil, a magnetic field is formed around the helical coil. At this time, when a conductor (eg, a metal film) is positioned away from the helical coil, the induced current is symmetric to the current direction applied to the helical coil. Is generated.

In this case, the induced current is varied according to the change in the intensity of the magnetic field, and the strength of the force applied to the touch panel is detected according to the oscillation of the resonance frequency.

Therefore, the touch sensor module using the concept of inductance force sensor is conceptually spaced apart from the coil layer 10 on the coil layer 10 and the coil layer 10 on which the coil L1 is conceptually arranged, as shown in FIG. 1. The touch object 20 is provided.

In this case, a spacer 30 is positioned between the coil layer 10 and the touch object 20, and the coil layer 10 and the touch object 20 are spaced apart by the thickness of the spacer 30. .

The coil layer 10 is a plate in which the coil L1 is disposed on a substrate made of an insulating material such as a flexible printed circuit board (FPCB), and the like, as shown in FIG. 2. The coil L1 is arrange | positioned at the upper part and the lower part.

In FIG. 1, the coil L1 is located at both the top and the bottom, but is not limited thereto, but is not limited thereto. The coil layer may be positioned adjacent to one side of the top and bottom, for example, the touch object 20. It may be located only at the top of 10).

The touch object 20 has a thin plate shape covering the coil layer 10 on the touch sensor module, and is adjacent to a display device module (not shown) positioned above the touch object module.

In this case, the display device module may be a liquid crystal display module using liquid crystal or an organic light emitting display module using an organic light emitting diode.

The touch object 20 is a conductive film made of a transparent conductive material such as indium tin oxide (ITO) or a conductive material such as metal, and the degree of warpage varies according to the degree of physical force applied from the outside. In addition, when the physical force is removed, the bending state of the touch object 20 is restored to the initial state by elasticity.

Therefore, when the user presses the display device module positioned above the touch object 20, the physical force according to the pressing operation of the user is transmitted to the touch object 20, and the touch object 20 is applied to the touch point according to the pressing intensity. It is bent in proportion to the strength of the applied force.

As such, since the touch object 20, which is a conductor, is positioned on the coil layer 10 to be spaced apart from the coil layer 10, when an alternating current is applied to the coil L1 positioned on the coil layer 10, a magnetic field is formed. An induction current, which is an eddy current, is generated in the chain touch object 20, and the magnetic field of the coil L1 changes according to the induction current, so that the inductance size of the coil L1 also changes.

That is, as shown in FIG. 3A, when an alternating current is applied to the coil L1 and an alternating current flows, when the magnetic field M1 is generated in the coil L1, the touch object 20 is affected by the influence of the magnetic field M1. Induced current I1, which is an eddy current, is generated.

However, as shown in FIG. 3B, when the touch operation is performed on the touch object 20 and the corresponding point of the touch object 20 is bent, the distance between the corresponding point and the touch sensor module is reduced to reduce the touch object 20 at the corresponding point. ) And the coil L1 located below the point decreases.

Therefore, as the distance between the touch object 20 and the coil L1 decreases, the magnitude of the induced current I1 at the corresponding point of the touch object 20 increases, and is affected by the increasing induction current I1. The magnetic field M1 occurring in the coil L1 at the point decreases.

This reduction in the magnetic field M1 will reduce the effective inductance of the coil L1.

As such, since the inductance of the coil L1 is changed by the change in the distance between the touch object 20 and the coil L1 according to the touch degree of the touch object 20, when the magnitude of the inductance is detected, the touch point of the touch panel is detected. The degree of force applied to the pressure, that is, the degree of pressing in the Z-axis direction is sensed.

Next, a touch panel according to an exemplary embodiment of the present invention will be described with reference to FIGS. 4 to 8. The touch panel of this example includes a touch sensor module using the concept of inductance force sensor described above.

First, as shown in FIG. 4, the touch panel 100 according to the first embodiment of the present invention includes a touch sensor module 110 and a display device module 120 positioned on the touch sensor module 110. .

The touch sensor module 110 is positioned on the first conductive layer 111 and the first conductive layer 111 positioned at the bottom thereof, and the coil layer 112 and the coil layer 112 on which the coil 1122 is positioned. A second conductive film 113 and a spacer 114 positioned between the coil layer 112 and the second conductive film 113 are provided.

The first and second conductive films 111 and 113 are formed in a plate shape made of a metal such as aluminum (Al) or copper (Cu), respectively, and are positioned to correspond to each other on opposite sides with the coil layer 112 interposed therebetween. .

Induction currents, which are eddy currents, are generated in the first and second conductive layers 111 and 113 according to a magnetic field generated by applying an alternating current to the coil 1122 positioned in the coil layer 112. The intensity of V depends on the distance between the adjacent coil 1122 and the corresponding conductive films 111 and 113. Therefore, as the distance from the coil 1122 decreases, the strength of the eddy currents formed in the conductive films 111 and 113 increases.

In the present example, the first conductive film 111 is positioned below the coil layer 112 in contact with the coil layer 112 through an adhesive or the like under the coil layer 112 or under the coil layer 112 through an adhesive layer formed in applying the adhesive. The second conductive film 113 is spaced apart from the corresponding coil 1122 of the coil layer 112 positioned below the thickness of the spacer 114 by the spacer 114.

The spacer 114 may also be stably positioned at corresponding portions of the coil layer 112 and the second conductive layer 113 which contact each other through adhesives applied to the lower and upper surfaces thereof.

Accordingly, the distance L11 between the first conductive film 111 and the coil 1122 positioned adjacent to each other by the adhesive is spaced apart from the second conductive film 113 and the coil 1122 by the spacer 114. It is much narrower than the interval L12.

In this example, the first conductive film 111 in close contact with the lower portion of the coil layer 112 has a plurality of conductive film portions P11-P1n (where n is a positive integer) spaced by a predetermined interval. do.

That is, as shown in FIG. 5A, as an example, the first conductive film 111 includes a plurality of openings H11 that completely pass through the portion.

Therefore, the first conductive film 111 is formed by the plurality of conductive film portions P11-P1n and the plurality of conductive film portions P11-P1n spaced apart by the width W11 of the opening H11 by the opening H11 formed. ) Is provided with an edge portion P21 connected thereto.

At this time, since the formation position of the opening H11 corresponds to the coil formation position of the coil layer 112 located above, the opening 11 is formed in the portion of the first conductive film 111 corresponding to the coil 1122. The conductive film portions P11-P1n spaced apart from each other.

An opening H11 is not located at a portion of the first conductive layer 111 that does not correspond to the coil 1122, for example, an edge portion P21 of the first conductive layer 111. The film part P11-P1n is enclosed in all directions.

However, as another example, as shown in FIG. 5B, the first conductive film 111 includes a plurality of sub-conductive films S11-S1n that are completely separated, and these sub-conductive films S11- S1n) is arranged to be spaced apart by a predetermined interval W11 in the corresponding direction. Each of the plurality of sub conductive films S11-S1n constitutes a conductive film portion of the first conductive film 111, and the width W12 of each of the sub conductive films S11-S1n is illustrated in FIG. 5A. The width W12 of each conductive film portion P11-P1n may be the same.

Accordingly, the conductive film portions P11-P1n of FIG. 5A are connected to each other at the edge portion, while the sub conductive films S11-S1n of FIG. 5B are adjacent to the sub conductive film S11-. Completely separated from S1n).

The first conductive layer 111 performs an electromagnetic shielding function with an electric circuit such as a battery disposed under the touch sensor module 110.

Accordingly, by the first conductive layer 111, the touch sensor module 110 accurately detects the amount of change in inductance according to the touch degree of the display device module 120 without the influence of electromagnetic waves emitted from an electric circuit disposed below. .

The second conductive layer 113 positioned above the coil layer 112 may be formed of a conductive material such as ITO as well as a metal material, and may be formed in a plate shape covering the entire coil layer 112 located below. Unlike the first conductive film 111, as shown in FIG. 6, no openings or sub-conductive films spaced apart from each other are provided.

The second conductive layer 113 distinguishes the display device module 120 and the touch sensor module 110 disposed above, and is curved in proportion to the physical force applied according to the touch operation of the display device module 120. All. Therefore, the distance between the second conductive film 113 and the coil layer 112 decreases at the touch point, thereby changing the inductance of the coil 1122.

As such, the touch panel 100 of the present example senses the magnitude of the inductance that changes in proportion to the physical force applied to the display device module 120 to determine the degree of touch in the Z-axis direction.

The coil layer 112 positioned between the first conductive layer 111 and the second conductive layer 113 may include a substrate 1121 and a substrate 1121 including a single-sided printed circuit board, a double-sided printed circuit board, or a multilayer printed circuit board. Coil 1122 located on the upper and lower surfaces of the < RTI ID = 0.0 >

In this case, the substrate 1121 may be a rigid printed circuit board or a flexible printed circuit board.

In FIG. 4, molding is performed on the upper and lower surfaces of the substrate 1121 on which the coil 1122 is located by using epoxy or the like.

As described above, an alternating current having a corresponding magnitude is applied to the coil 1122 such that eddy currents are generated in the first and second conductive layers 111 and 113 corresponding to the lower and upper portions.

In this example, the coil 1122 is located on the top and bottom surfaces of the substrate 1121, but is not limited thereto and may be located on only one side (eg, the top surface) of the substrate 1121.

The spacer 114 is positioned between the coil layer 112 and the second conductive layer 113 to space the upper portion of the coil layer 112 from the second conductive layer 113.

The spacer 114 supports the second conductive layer 113 positioned at an edge of the coil layer 112 where the coil 1122 is not located.

The display device module 120 includes a display panel 121 and a passivation layer 122 on the display panel 121.

The display panel 121 may be a display panel of a liquid crystal display device implementing a display device using liquid crystal or a display panel of an organic light emitting display device implementing a display device using an organic light emitting diode.

The passivation layer 122 is a layer exposed to the outside and protects the display panel 121 and may be made of glass, transparent plastic, or the like.

In the touch panel 100 having such a structure, when an alternating current is applied to the coil 1122 of the coil layer 112, as described above, the first and the second may be affected by the magnetic field generated by the coil 1122. Eddy currents are generated in the conductive films 111 and 113.

At this time, when the first and second conductive films 111 and 113 have the same structure, the first conductive film 111 is further spaced apart from the coil 1122 by the second conductive film 113. Since it is small, the magnitude of the eddy current formed in the first conductive film 111 is much larger than the magnitude of the eddy current formed in the second conductive film 113.

However, in the present example, the first conductive film 111 includes a plurality of conductive film portions P11-P1n or S11-S1n spaced apart from each other by the opening H11 or the spaced interval W11.

Therefore, as shown in FIG. 7A, one eddy current is generated on the entire surface corresponding to the coil 1122, and the first conductive film 111 is compared with the second conductive film 113 having one eddy current portion generation region. ), As shown in Fig. 7B, one eddy current is formed in each conductive film portion P11-P1n or S11-S1n, and a plurality of conductive film portions P11-P1n or S11-S1n are provided. Eddy current generating regions.

Therefore, in the case of the second conductive film 113, the eddy current range of the eddy current is the entire plane, but in the case of the first conductive film 111, the eddy current range of the eddy current is each conductive film portion P11-P1n or S11-S1n. It is limited to).

As such, the eddy current formed by dividing the first conductive film 111 into the plurality of conductive film portions P11-P1n or S11-S1n is also divided into a plurality of first conductive films, so that the first conductive film 111 is compared with the second conductive film 113. The intensity of the eddy current formed in the 111 is greatly reduced.

For this reason, in the case of the first conductive film 111, the first conductive film (although the distance L11, which is a distance from the coil 1122, is much shorter than the gap L12 of the second conductive film 113). The intensity of the eddy current formed in the 111 is smaller than that of the eddy current formed in the second conductive film 113.

As such, the intensity of the eddy current generated in the first conductive film 111 is reduced by dividing the eddy currents formed in the first conductive film 111 into a plurality, thereby reducing the eddy current generated in the first conductive film 111. The amount of inductance of the coil 1122 is also greatly reduced.

Accordingly, the inductance of the coil 1122 is dependent on the distance L12 between the second conductive film 112 and the coil 1122 of the coil layer 112, which changes according to the touch intensity when the display module 120 is touched. Change.

As such, even if the first conductive film 111 is positioned adjacent to the coil layer 112 for electromagnetic shielding, the inductance according to the touch strength in the Z-axis direction can be easily changed without being affected by the first conductive film 111. By sensing, the phenomenon that the touch sensitivity of the touch panel is lowered is prevented.

Next, the touch panel 100a according to the second embodiment of the present invention will be described with reference to FIG. 8.

In FIG. 8, components having the same structure and performing the same function as compared with the examples described with reference to FIGS. 4 to 7 are given the same reference numerals as those given in FIG. 4, and detailed description thereof is also given. Omit.

In the touch panel 100a of the present example illustrated in FIG. 8, the spacer is positioned between the first conductive film and the coil layer, and the distance between the first conductive film and the corresponding coil is longer than the distance between the second conductive film and the corresponding coil. .

Therefore, the touch panel 100a of the present example also includes the touch sensor module 110a and the display device module 120 disposed on the touch sensor module 110a and including the display panel 121 and the passivation layer 122.

The touch sensor module 110a may include a coil layer 112 including a first conductive layer 111a disposed at the bottom thereof and a coil 1122 disposed on both surfaces of the substrate 1121 on the first conductive layer 111a. And a second conductive film 113a positioned on the coil layer 112, and a spacer 114 positioned between the first conductive film 111a and the coil layer 112.

At this time, the first conductive layer 111a is positioned below the coil layer 112 to perform an electromagnetic shielding function, and as shown in FIG. 6, one flat surface having no open portion and a whole flat surface is blocked. It consists of a membrane.

On the other hand, the second conductive film 113a has a structure as shown in FIGS. 5A and 5B, and the plurality of conductive films spaced apart from the adjacent ones by the opening H11 or the separation distance W11. Part P11-P1n or S11-S1n.

The second conductive layer 113a is in contact with the upper portion of the display panel 121 and the coil layer 113 of the display device module 120 through the adhesive layer 115 coated with the adhesive.

As such, the spacer 114 is positioned on the first conductive film 111a and the coil layer 112, and the gap L21 between the first conductive film 111a and the coil 1122 is the second conductive film 113a. ) And a distance L22 between the corresponding coil 1122.

However, as shown in FIG. 4, a plurality of second conductive films 113a, which are short conductive films L21 and L22 between the coils 122, are formed among the first and second conductive films 111a and 113a. By dividing the conductive film portions P11-P1n or S11-S1n, the intensity of the eddy current formed in the second conductive film 113a is made smaller than that of the eddy current formed in the first conductive film 111a, so that the physical distance is The phenomenon in which the inductance of the coil 122 decreases due to the eddy current formed in the adjacent second conductive film 113a is greatly reduced.

Therefore, since the inductance change of the coil 1222 is changed to correspond to the touch degree of the display device module 120, the change amount in the Z-axis direction of the touch panel 100a is easily sensed using the size of the inductance.

As such, the device for determining the touch degree of the touch panels 100 and 100a by using the amount of change in inductance according to the touch degree of the display device module 120 may be detected by the detector and the detector that detect the inductance of the coil 1222. A voltage divider for a reference voltage for comparison with a signal, a comparator connected to a sensing unit and a voltage divider, and a control unit connected to an output terminal of the comparator and performing a corresponding control operation according to a state of an output signal of the comparator can do.

Next, the comparative example of this invention is demonstrated with reference to FIG.

The touch panel 100c according to the comparative example illustrated in FIG. 9 differs only from the structure of the first conductive layer 111c of the touch sensor module 110c as compared to the touch panel 100 of the present example illustrated in FIG. 4. The structure for the other components is the same.

Therefore, the touch panel 100c according to the comparative example includes the touch sensor module 110c and the display device module 120.

The touch sensor module 110c may include the first conductive layer 111c, the coil layer 112 on which the coil 1122 is located, the second conductive layer 113, and the coil layer 112 and the second conductive layer 113. It is provided with a spacer 114 located in.

 At this time, unlike the first conductive film 111 of the present example, the first conductive film 111c of the comparative example is made of one flat plate that is not divided into a plurality of conductive film portions, similarly to the second conductive film 113. .

As described above, since the shape of the first conductive film 111c is the same as that of the second conductive film 113, the eddy current formation ranges of the eddy currents formed in the first and second conductive films 111c and 113 are the same.

However, the distance L31 between the first conductive film 111c and the coil 1122 is larger than the distance L32 between the second conductive film 113 and the coil 1122 spaced apart by the spacer 114. Since the strength of the eddy current formed in the first conductive film 111c is much closer than that of the eddy current formed in the second conductive film 113, the eddy current formed in the first conductive film 111c is much closer. As a result, the inductance of the coil 1122 is reduced than when the first conductive film 111c does not exist.

In this situation, the distance L32 between the second conductive film 113 and the coil 1122, which is narrowed to the maximum by the touch operation of the display device module 120, is a distance between the first conductive film 111c and the coil 1122. Since it is larger than (L21), the amount of change in inductance of the coil 1122 due to the change in the eddy current intensity of the second conductive film 113 according to the change in the distance between the second conductive film 113 and the coil 1122 is insufficient.

Therefore, the touch sensitivity of the touch panel 100c is not precise, and thus the touch in the Z-axis direction cannot be accurately sensed due to the change in the inductance caused by the change in the distance between the second conductive layer 113 and the coil 1122 according to the touch operation. Malfunction occurs in the sensing operation to detect the degree.

Most preferably, the first conductive film 111 in the first embodiment is removed, the first conductive film 111a in the second embodiment is removed, or the first conductive film 111c in the comparative example is removed. It may be good to do it. However, as described above, the first conductive layers 111, 111a, and 111c perform a function of blocking the propagation of electromagnetic waves emitted from an electric circuit located below. In addition, the first conductive layers 111, 111a, and 111c perform a function of blocking the propagation of electromagnetic waves emitted from the electric circuit and the device disposed above. Therefore, it is impossible to remove the first conductive films 111, 111a, and 111c, and the first and second embodiments are derived to solve the problem of the comparative example.

Referring to Table 1 below, the state in which the first conductive film 111 is removed in the first embodiment, the comparative example, and the inductance variation in the first embodiment will be described.

In the above three examples, the distance between the second conductive film 113 positioned above and the adjacent coils L12, L21, L32 is 250 µm, and when an alternating current is applied to the coil 1122, the resonance frequency is approximately It is output at 3MHz. In the first embodiment and the comparative example, the intervals L11, L22, and L31 between the first conductive layers 111 and 111c disposed below and the adjacent coil 1122 are respectively within 20 μm.

Frequency (MHz) Inductance (uH) Remove first conductive film 3 MHz 2.97 Comparative example 0.62 First embodiment 2.13

As shown in Table 1, if the first conductive layer is removed, an inductance change amount of 2.97 uH may be generated to detect a touch degree. In the case of the comparative example, the change in inductance decreases to 0.62 uH, the impedance decreases and the sensing voltage decreases when a constant alternating current is applied, causing an oscillation error phenomenon and malfunctioning in the sensing operation of detecting the touch degree in the Z-axis direction. This may occur.

However, according to the present invention, the size of the eddy current formed in the first conductive film 111 by dividing the first conductive film 111 into a plurality of conductive film portions decreases the size of the inductance from 0.62 uH to 2.13 uH. It was found to increase. Accordingly, the accuracy of the sensing operation for detecting the degree of touch in the Z-axis direction can be greatly improved.

In this example, the spacer 114 is positioned between the layers, that is, between the second conductive film 113 and the coil layer 112 or between the coil layer 112 and the first conductive film 111a. There is no portion where the spacer 114 is not located.

However, in an alternative example, the spacer, in the case of FIGS. 4 and 9, is formed in the form of a flat plate which is entirely positioned between the second conductive film 113 and the coil layer 112, thereby forming the second conductive film 113. It is located between the entire lower surface of the () and the entire upper surface of the coil layer (112).

8, the spacer is formed in a flat plate shape, and the spacer is entirely located between the coil layer 112 and the first conductive film 111a, so that the entire lower surface of the coil layer 112 and the first conductive film are disposed. It is located between the whole upper surface of 111a.

At this time, in order to bond between the corresponding layer and the spacer positioned on the upper and lower portions of the spacer, respectively, in FIGS. 4 and 9, between the entire upper surface of the spacer and the entire lower surface of the second conductive film 113 and An adhesive layer is positioned between the entire lower surface and the entire upper surface of the coil layer 112, and in FIG. 8, even between the entire upper surface of the spacer and the entire lower surface of the coil layer 112 and the entire lower surface of the spacer. Adhesive layers are also located between the entire upper surface of the first conductive film 111a.

In this case, the spacer material is a foam foam type used for waterproofing and dustproofing such as polyethylene, polyurethane, polyolefin, etc., which has elasticity with excellent restoring force and compression ratio. There is no gap in which water is introduced, and a tape of a substrate that withstands high water pressure without passing through the water may be used.

As such, when the spacer is made of an elastic material and positioned in the entirety between the two layers, the coil layer 113 and the second conductive film 112 positioned on the spacer are supported by the spacer, respectively. When the touch operation is not performed by the touch panel, since the initial state is stably maintained without bending, the reliability of the operation of the touch panel is improved and the life is extended.

In addition, the restoring force of the second conductive films 113 and 113a is improved by the spacer, so that the response speed of the operation with respect to the touch panel 100 is improved, thereby increasing the user's satisfaction.

Furthermore, since the spacer is located on the entire surface of the coil layer 112, the difficulty due to the alignment operation of the spacer is reduced, and thus the touch sensor module 110 is easily manufactured.

In the above, embodiments of the touch sensor module and a touch panel having the same have been described. The present invention is not limited to the above-described embodiment and the accompanying drawings, and various modifications and variations will be possible in view of those skilled in the art to which the present invention pertains. Therefore, the scope of the present invention should be defined not only by the claims of the present specification but also by the equivalents of the claims.

100, 100a: touch panel 110, 110a: touch sensor module
111, 111a: first conductive film 112: coil layer
1122: coil 113, 113a: second conductive film
114: spacer 120: display module
P11-P1n, S11-S1n: conductive film portion
L11 and L21: gap between the first conductive film and the coil
L12, L22: gap between the second conductive film and the coil

Claims (13)

A first conductive film;
A coil layer disposed on the first conductive film and having a coil;
A second conductive layer on the coil layer; And
A spacer positioned between the coil layer and the second conductive film
Including,
The first conductive film includes a plurality of conductive film parts spaced apart from each other.
Touch sensor module. A first conductive film;
A coil layer disposed on the first conductive film and having a coil;
A second conductive layer on the coil layer; And
Spacer positioned between the first conductive film and the coil layer
Including,
The second conductive film includes a plurality of conductive film parts spaced apart from each other.
Touch sensor module. In claim 1,
The first conductive film includes a plurality of openings, and adjacent conductive film portions are spaced apart by the openings. In claim 1,
The plurality of conductive film portions are arranged in a predetermined direction by a predetermined spacing interval. In claim 2,
And the second conductive film includes a plurality of openings, and adjacent conductive film portions are spaced apart by the openings. In claim 2,
The plurality of conductive film portions are arranged in a predetermined direction by a predetermined spacing interval. The method of claim 1 or 2,
The coil layer includes an insulation substrate, and the coil is spirally arranged on at least one of an upper surface and a lower surface of the insulation substrate. A first conductive film;
A coil layer disposed on the first conductive film and having a coil;
A second conductive layer on the coil layer;
A spacer positioned between the coil layer and the second conductive film; And
Display device module disposed on the second conductive layer
Including,
The first conductive film includes a plurality of conductive film parts spaced apart from each other.
Touch panel. A first conductive film;
A coil layer disposed on the first conductive film and having a coil;
A second conductive layer on the coil layer;
A spacer positioned between the first conductive film and the coil layer; And
Display device module positioned on the second conductive layer
Including,
The second conductive film includes a plurality of conductive film parts spaced apart from each other.
Touch panel. In claim 8,
The first conductive film includes a plurality of openings, and adjacent conductive film portions are spaced apart by the openings. In claim 8,
The plurality of conductive film portions are arranged in a predetermined direction by a predetermined spacing interval. In claim 9,
The first conductive film includes a plurality of openings, and adjacent conductive film portions are spaced apart by the openings. In claim 9,
The plurality of conductive film portions are arranged in a predetermined direction by a predetermined spacing interval.

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