KR102050448B1 - Touch sensing device and manufacturing method of the same - Google Patents

Abstract

An embodiment of the present disclosure relates to a touch sensing apparatus capable of improving touch sensing map, and includes a plurality of first planar electrodes formed on one surface of a first substrate and corresponding to a first direction, and the plurality of first planes. A first electrode pattern layer including a plurality of first loop electrodes surrounding an outer edge of each electrode; And a plurality of second planar electrodes insulated from the first electrode pattern layer and corresponding to a second direction crossing the first direction, and a plurality of second loops surrounding outer peripheries of the plurality of second planar electrodes, respectively. Provided is a touch sensing device including a second electrode pattern layer including an electrode.

Description

TOUCH SENSING DEVICE AND MANUFACTURING METHOD OF THE SAME}

The present invention relates to a touch sensing device and a method for manufacturing the same, which is advantageous for thinning and can improve touch sensitivity.

In general, personal computers, portable communication devices, and other personal information processing devices use various input devices such as a keyboard, a mouse, and a digitizer to configure an interface with a user. In recent years, as the development of mobile communication equipment has been expanded, input devices such as a keyboard and a mouse have difficulty in increasing the completeness of a product, and thus, development of an input device having high portability, which can be used in a simpler method, continues. Accordingly, a touch sensing device for inputting information by directly touching a screen with a hand or a pen has been proposed.

The touch sensing device has a number of malfunctions, has the advantage of being portable because it is possible to input characters without other input devices, and has been applied to various information processing apparatuses recently. In particular, the touch sensing device is generally implemented in a form added to the flat panel display device, rather than being implemented alone. As described above, when the flat panel display device to which the touch sensing device is added is used, an icon or a keyboard displayed on the screen is selected and the icon or keyboard is selected to provide an input / output interface for inputting information.

The touch sensing device may sense a touch as a resistive type, a capacitive type, an electromagnetic induction type, or the like.

Among them, the capacitive type forms an equipotential on the conductive film and detects a touch based on a change in capacitance due to contact.

The electromagnetic induction method senses a touch based on the LC value induced as the electronic pen contacts the conductive layer.

On the other hand, the recent touch sensing device includes a capacitive first touch panel and an electromagnetic induction type second touch panel, and a pressure-sensitive adhesive layer that combines the capacitive type and the electromagnetic induction method, thereby providing convenience to the user. Promote.

In this case, each of the first and second touch panels includes a separate substrate, and an adhesive layer for bonding them is disposed between the first and second touch panels. In addition, since the first touch panel of the capacitive type can sense a direct touch, the second touch panel of the electromagnetic induction type should be disposed under the first touch panel.

As a result, there is a problem in that the thickness of the touch sensing apparatus is limited, and the signal strength detected by the second touch panel of the electromagnetic induction method is reduced, thereby lowering the touch sensing.

The present invention is to provide a touch sensing device and a method of manufacturing the same that can be advantageous in thinning by implementing the capacitive method and the electromagnetic induction method integrally.

In order to solve such a problem, the present application is formed on one surface of a first substrate, and includes a plurality of first planar electrodes corresponding to a first direction, and a plurality of first plane electrodes surrounding outer peripheries of each of the plurality of first planar electrodes. A first electrode pattern layer including a loop electrode; And a plurality of second planar electrodes insulated from the first electrode pattern layer and corresponding to a second direction crossing the first direction, and a plurality of second loops surrounding outer peripheries of the plurality of second planar electrodes, respectively. Provided is a touch sensing device including a second electrode pattern layer including an electrode.

In addition, the present application includes a first electrode pattern layer including a plurality of first planar electrodes corresponding to a first direction and a plurality of first loop electrodes surrounding outer peripheries of each of the plurality of first planar electrodes on a first substrate. Forming a; And a plurality of second planar electrodes insulated from the first electrode pattern layer and corresponding to a second direction crossing the first direction, and a plurality of second loops surrounding outer peripheries of the plurality of second planar electrodes, respectively. It provides a method of manufacturing a touch sensing device comprising the step of forming a second electrode pattern layer including an electrode.

The touch sensing apparatus according to the exemplary embodiment of the present application includes a plurality of first and second planar electrodes, and a plurality of first and second loop electrodes formed on the same layer as each of them.

Thus, without including the capacitive touch panel and the electro-inductive touch panel attached to the lower portion thereof, it is possible to provide capacitive touch sensing and electro-inductive touch sensing.

And, as the plurality of first and second loop electrodes are formed on the same layer as each of the plurality of first and second planar electrodes, the intensity of the signal received by the plurality of first and second loop electrodes is increased accordingly. Touch sensing map for the electro-inductive touch can be improved.

In addition, a substrate or one insulating layer is provided between a first electrode pattern layer including a plurality of first planar electrodes and a plurality of first loop electrodes, and a second pattern layer including a plurality of second planar electrodes and a plurality of second loop electrodes. Since only the layer is interposed, it can be advantageous for thinning.

1 is a perspective plan view of a touch sensing apparatus according to a first embodiment of the present application.
2 is a cross-sectional view taken along line II ′ of FIG. 1 according to a first embodiment of the present disclosure.
3 is a cross-sectional view illustrating II-II ′ of FIG. 1 according to the first embodiment of the present disclosure.
4 is a flowchart illustrating a method of manufacturing a touch sensing apparatus according to an embodiment of the present application.
5 is a cross-sectional view taken along line II ′ of FIG. 1 according to a second embodiment of the present disclosure.
6 is a cross-sectional view illustrating II-II ′ of FIG. 1 according to a second embodiment of the present disclosure.
7 is a flowchart illustrating a method of manufacturing a touch sensing apparatus according to a second embodiment of the present application.

Hereinafter, a touch sensing apparatus and a manufacturing method thereof according to an embodiment of the present application will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 1 to 4, a touch sensing apparatus and a manufacturing method thereof according to the first embodiment of the present disclosure will be described.

As shown in FIG. 1, the touch sensing apparatus 100 according to the first exemplary embodiment of the present disclosure is formed on one surface of the first substrate 101 and the first substrate 101, and the first direction (the horizontal direction in FIG. 1). First electrode pattern layer 110 including a plurality of first planar electrodes 111 and a plurality of first loop electrodes 112 surrounding the periphery of each of the plurality of first planar electrodes 111. And a plurality of second planar electrodes 121 insulated from the first electrode pattern layer 110 and corresponding to a second direction (vertical direction in FIG. 1) crossing the first direction, and a plurality of second planes. The second electrode pattern layer 120 including a plurality of second loop electrodes 122 surrounding the outer edge of each of the electrodes 121 is included.

The touch sensing apparatus 100 further includes a first input terminal 112a and a first output terminal 112b connected to both ends of each of the plurality of first loop electrodes 112.

Here, the first input terminal 112a and the first output terminal 112b of each of the plurality of first loop electrodes 112 may be formed as part of the first electrode pattern layer 110. That is, it may be formed on the same layer as the plurality of first loop electrodes 112.

In addition, the first input terminal 112a and the first output terminal 112b of each of the plurality of first loop electrodes 112 may be parallel to one side edge (the right edge in FIG. 1) of the first substrate 101. It can be arranged side by side. In this way, two or more different first loop electrodes 112 may be adjacent to each other or intersect with each other, thereby reducing the possibility of occurrence of signal interference or short.

In addition, the touch sensing apparatus 100 further includes a second input terminal 122a and a second output terminal 122b connected to both ends of each of the plurality of second loop electrodes 122.

Here, the second input terminal 122a and the second output terminal 122b of each of the second loop electrodes 122 may be formed as part of the second electrode pattern layer 120. That is, it may be formed on the same layer as the plurality of second loop electrodes 122.

In addition, the second input terminal 122a and the second output terminal 122b of each of the plurality of second loop electrodes 122 may be parallel to one side edge (the right edge in FIG. 1) of the second substrate 101. It can be arranged side by side. In this way, two or more different second loop electrodes 122 may be adjacent to each other or cross each other, thereby reducing the possibility of occurrence of signal interference or short.

2 and 3, the touch sensing apparatus 100 according to the first embodiment includes a plurality of first planar electrodes 111 formed on one surface of the first substrate 101 and the first substrate 101. ) And a first insulating layer 130 formed on the entire surface of the first electrode pattern layer 110 including the plurality of first loop electrodes 112 and on the first substrate 101 and covering the first electrode pattern layer 110. ), A second substrate 102 formed on the first insulating layer 130, a plurality of second planar electrodes 121 and a plurality of second loop electrodes 122 formed on one surface of the second substrate 102. And a second insulating layer 140 formed on the entire surface of the second substrate 102 and covering the second electrode pattern layer 120.

The touch sensing apparatus 100 may further include a cover substrate 103 formed on the second insulating layer 140 and protecting the first and second electrode pattern layers 110 and 120.

The first and second substrates 101 and 102 may be in the form of a film having flexibility. In addition, the first and second substrates 101 and 102 may be transparent materials so that the touch sensing apparatus 100 may be provided on the display surface of the display device.

The first and second insulating layers 130 may be adhesive materials so as to be combined with the second substrate 102 and the cover substrate 103 without a separate adhesive layer, respectively.

The plurality of first planar electrodes 111 and the plurality of second planar electrodes 121 are for sensing a touch in a capacitive manner.

That is, when a touch occurs, the capacitance changes in a region where the first and second planar electrodes 111 and 121 cross each other while being insulated from each other. Therefore, the touch position may be sensed based on the intersection of the first planar electrode 111 and the second planar electrode 111 and 121 whose potential is changed.

In addition, the plurality of first loop electrodes 112 and the plurality of second loop electrodes 122 are for sensing a touch by an electron induction method.

That is, the first and second loop electrodes 112 and 122 adjacent to the electronic pen (not shown) emitting a predetermined magnetic field signal within a critical distance are induced by electromagnetic based on the magnetic field signal received from the electronic pen (not shown). do. Therefore, the touch position may be sensed based on the intersection of the first and second loop electrodes 112 and 122 where the current is sensed and the sensed current intensity.

The first and second electrode pattern layers 110 and 120 may be formed of a transparent conductive material. This is to minimize image quality reduction when the touch sensing apparatus 100 is mounted on the display surface of the display apparatus.

As described above, according to the first embodiment of the present application, the plurality of first planar electrodes 111 and the plurality of first loop electrodes 112 are the same layer, that is, the first electrode pattern layer on the first substrate 101. It is formed of (110). The plurality of second planar electrodes 121 and the plurality of second loop electrodes 122 are formed on the same layer, that is, the second electrode pattern layer 120 on the second substrate 102.

In other words, the touch sensing apparatus 100 according to the first embodiment of the present disclosure may have a plurality of first and lower portions in addition to two substrates having a plurality of first and second planar electrodes 111 and 121 interposed therebetween. The two substrates having the second loop electrodes 112 and 122 are not separately included. As a result, since the two substrates provided separately on the lower side and the adhesive layer for bonding the two substrates on the upper side thereof can be removed, it can be advantageous for thinning.

In addition, the substrate and the adhesive layer separately provided below may be a factor of reducing the intensity of the magnetic field signal transmitted from the electronic pen, and the plurality of first and second loop electrodes 112 and 122 may be removed. Are formed on the same layer as the first and second planar electrodes 111 and 121. As a result, since the plurality of first and second loop electrodes 112 and 122 may receive a magnetic field signal having a greater intensity than the conventional one, the touch sensitivity of the electromagnetic induction method may be improved.

As shown in FIG. 4, in the method of manufacturing the touch sensing apparatus 100 according to the first embodiment, forming a first electrode pattern layer on a first substrate (S110) and forming a first insulating layer Step S111, forming a second electrode pattern layer on the second substrate (S120), forming a second insulating layer (S121), bonding the second substrate on the first insulating layer (S130) ), And forming a cover substrate (S140).

2 and 3, according to the first embodiment, the conductive layer on the first substrate 101 is patterned to include a plurality of first planar electrodes 111 and a plurality of first loop electrodes 112. The first electrode pattern layer 110 is formed. Next, an insulating material is coated on the entire surface of the first substrate 101 to form a first insulating layer 130 covering the first electrode pattern layer 110. (S111)

The conductive layer on the second substrate 102 is patterned to form a second electrode pattern layer 120 including a plurality of second planar electrodes 121 and a plurality of second loop electrodes 122. Next, an insulating material is coated on the entire surface of the second substrate 102 to form a second insulating layer 140 covering the second electrode pattern layer 120. (S121)

At this time, the steps of forming the second electrode pattern layer 120 and the second insulating layer 140 (S120, S121) using a separate manufacturing apparatus, the first electrode pattern layer 110 and the first insulating layer ( 130 may be performed at the same time as forming the step (S110, S111).

As such, the first substrate 101 including the first electrode pattern layer 110 and the first insulating layer 130, the second electrode pattern layer 120, and the second insulating layer 140 may be formed of the first substrate 101. After preparing the second substrate 102 (S110, S111, S120, S121), the second substrate 102 is bonded to the first insulating layer 130. In this case, the first insulating layer 130 and the second substrate 102 are bonded to each other using a pressure-sensitive adhesive layer provided therebetween, or are bonded to each other using the adhesiveness of the first insulating layer 130 (S130). Can be.

The cover substrate 103 is formed on the second insulating layer 140. In this case, the second insulating layer 140 and the cover substrate 103 may be bonded to each other using an adhesive layer provided separately therebetween, or may be bonded to each other using the adhesiveness of the second insulating layer 140 (S140). Can be.

Meanwhile, according to the first embodiment of the present application, the first and second electrode pattern layers 110 and 120 are formed on the first and second substrates 101 and 102 and on the first insulating layer 130. The second substrate 102 is bonded. That is, the first and second electrode pattern layers 110 and 120 are mutually insulated by the first insulating layer 130 and the second substrate 102 therebetween.

Alternatively, one substrate may be interposed between the first and second electrode pattern layers 110 and 120, and the first and second electrode pattern layers 110 and 120 may be insulated from each other by one substrate.

In addition, the plurality of first planar electrodes 111 and the plurality of first loop electrodes 112 are formed together on the same layer (S110), and the plurality of second planar electrodes 121 and the plurality of second loop electrodes 122 are formed together. ) Are formed on the same layer, the number of processes can be reduced, the process time can be shortened and the manufacturing cost can be reduced.

Hereinafter, a touch sensing apparatus and a manufacturing method thereof according to a second embodiment of the present disclosure will be described with reference to FIGS. 5 to 7.

As shown in FIGS. 5 and 6, the touch sensing apparatus 100 ′ according to the second embodiment of the present disclosure may include a first substrate 101 and one surface of the first substrate 101 (see FIGS. 5 and 6). First electrode pattern layer 110 including a plurality of first planar electrodes 111 and a plurality of first loop electrodes 112 and one surface of the first substrate 101 formed on the first substrate 101. The first insulating layer 130 formed on the entire surface and covering the first electrode pattern layer 110, and formed on the other surface of the first substrate 101 (the upper surface of the first substrate 101 in FIGS. 5 and 6). A second electrode pattern layer 120 including a plurality of second planar electrodes 121 and a plurality of second loop electrodes 122, and a second electrode pattern layer formed on the entire other surface of the first substrate 101. And a second insulating layer 140 covering the 120. The display substrate 103 may further include a cover substrate 103 formed on the second insulating layer 140 and protecting the first and second electrode pattern layers 110 and 120.

According to this second embodiment, only the first substrate 101 is interposed between the first and second electrode pattern layers 110 and 120. That is, unlike the first embodiment, since it does not include the second substrate 102, it can be advantageous in thinning accordingly.

As described above, the touch sensing apparatus 100 ′ according to the second embodiment of the present application removes the second substrate 102, and the second electrode pattern layer 120 and the second electrode pattern layer 120 are formed on the other surface of the first substrate 101. Except for forming the second insulating layer 140, since it is the same as the first embodiment of the present application, a redundant description will be omitted below.

As shown in FIG. 7, in the method of manufacturing the touch sensing apparatus 100 ′ according to the second embodiment, forming a first electrode pattern layer on one surface of a first substrate (S110) and forming a first insulating layer (S111), forming the second electrode pattern layer on the other surface of the first substrate (S120 '), forming the second insulating layer on the entire other surface of the first substrate (S121'), and the cover Forming a substrate (S140 ').

As such, in the method of manufacturing the touch sensing apparatus 100 ′ according to the second embodiment of the present application, the first electrode pattern layer 110 and the first insulating layer 130 are formed on one surface of the first substrate 101. Next, at S110 and S111, the second electrode pattern layer 120 and the second insulating layer 140 are formed on the other surface of the first substrate 101 (S120 ′ and S121 ′), and the first insulating layer. Since it does not include attaching a separate substrate (second substrate 102 of FIGS. 2 and 3) on the 130 (S130 of FIG. 4), and is the same as the first embodiment of the present application In the following, redundant description will be omitted.

1 illustrates that the first and second planar electrodes 111 and 121 have a rectangular shape, this is only an example, and the first and second planar electrodes 111 and 121 are not rectangular. It may also be in the form. In exemplary embodiments, each of the first and second planar electrodes 111 and 121 may have a shape in which rhombuses arranged side by side in one direction and both sides thereof are connected to each other. In this case, the first and second loop electrodes 112 and 122 may be formed on the outer side of each of the first and second planar electrodes 111 and 121 in a shape similar to these.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is conventional in the art that various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

100 and 100 ': touch sensing device 101: first substrate
110: first electrode pattern layer
111: first planar electrode 112: first loop electrode
112a, 112b: first input terminal and first output terminal
120; Second electrode pattern layer
121: second planar electrode 122: second loop electrode
122a, 122b: second input terminal and second output terminal
130: first insulating layer 140: second insulating layer
102: second substrate 103: cover substrate

Claims (11)

A first electrode pattern layer formed on one surface of the first substrate and including a plurality of first planar electrodes corresponding to a first direction, and a plurality of first loop electrodes surrounding outer peripheries of each of the plurality of first planar electrodes;
A plurality of second planar electrodes insulated from the first electrode pattern layer and corresponding to a second direction crossing the first direction, and a plurality of second loop electrodes surrounding outer peripheries of each of the plurality of second planar electrodes A second electrode pattern layer comprising a;
A first input terminal and a first output terminal connected to both ends of each of the plurality of first loop electrodes; And
A second input terminal and a second output terminal connected to both ends of each of the plurality of second loop electrodes;
The first input terminal and the first output terminal of each of the plurality of first loop electrodes are arranged side by side in a direction parallel to one edge of the first substrate,
And a second input terminal and a second output terminal of each of the plurality of second loop electrodes are arranged side by side in a direction parallel to the other edge of the first substrate. delete The method of claim 1,
A first insulating layer formed on one surface of the first substrate and covering the first electrode pattern layer; And
Further comprising a second substrate formed on the first insulating layer,
The second electrode pattern layer is formed on one surface of the second substrate. The method of claim 3, wherein
And a second insulating layer formed on one surface of the second substrate and covering the second electrode pattern layer. The method of claim 1,
The second electrode pattern layer is formed on the other surface of the first substrate. The method of claim 5,
A first insulating layer formed on one surface of the first substrate and covering the first electrode pattern layer; And
And a second insulating layer formed on the entire other surface of the first substrate and covering the second electrode pattern layer. Forming a first electrode pattern layer on the first substrate, the first electrode pattern layer including a plurality of first planar electrodes corresponding to a first direction and a plurality of first loop electrodes surrounding the periphery of each of the plurality of first planar electrodes ;
A plurality of second planar electrodes insulated from the first electrode pattern layer and corresponding to a second direction crossing the first direction, and a plurality of second loop electrodes surrounding outer peripheries of each of the plurality of second planar electrodes Forming a second electrode pattern layer comprising a;
In the forming of the first electrode pattern layer, further comprising a first input terminal and a first output terminal connected to both ends of each of the plurality of first loop electrodes,
In the forming of the second electrode pattern layer, further comprising a second input terminal and a second output terminal connected to both ends of each of the plurality of second loop electrodes,
The first input terminal and the first output terminal of each of the plurality of first loop electrodes are arranged side by side in a direction parallel to one edge of the first substrate,
And a second input terminal and a second output terminal of each of the plurality of second loop electrodes are arranged side by side in a direction parallel to the other edge of the first substrate. delete The method of claim 7, wherein
After the forming of the first electrode pattern layer,
And forming a first insulating layer covering the first electrode pattern layer on one surface of the first substrate. The method of claim 9,
In the forming of the second electrode pattern layer, the second electrode pattern layer is formed on one surface of the second substrate,
After the forming of the second electrode pattern layer, further comprising forming a second insulating layer covering the second electrode pattern layer on one surface of the second substrate,
After the forming of the first insulating layer and the forming of the second insulating layer, the second electrode pattern layer and the second substrate on which the second insulating layer is formed are bonded on the first insulating layer. Method of manufacturing a touch sensing device further comprising the step. The method of claim 9,
In the forming of the second electrode pattern layer, the second electrode pattern layer is formed on the other surface of the first substrate,
After the forming of the second electrode pattern layer, forming a second insulating layer covering the second electrode pattern layer on the entire other surface of the first substrate.

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