KR102153009B1 - Touch panel - Google Patents

Abstract

The touch panel is disclosed. According to an embodiment of the present invention, a substrate; A first intaglio portion recessed from one surface of the substrate to the other surface than the one surface to extend in a first direction; A first sensing electrode formed on the first intaglio; And a second sensing electrode formed on the substrate.

Description

Touch panel {TOUCH PANEL}

The present invention relates to a touch panel, and more particularly, by disposing a sensing electrode for sensing a touch stimulus from the outside and a wiring connected to the sensing electrode in an intaglio formed directly on the surface of a substrate, durability is improved and the thickness is reduced. It relates to a touch panel.

In response to the development of digital technology, information on text and graphics is processed through input devices. However, there is a limit to satisfying various functions required in the information society with only simple input devices such as a keyboard and a mouse, and a touch panel has been developed.

The touch panel is a device capable of sensing information input by a touch method. In electronic devices such as personal digital assistants (PDAs), notebook computers, OA devices, medical devices, or car navigation systems, a touch panel is widely used to detect a touch input using a human hand or an object in an image display area. Has become. That is, the touch panel is mounted on a display surface of a flat panel display device such as a liquid crystal display device and is used to receive a touch stimulus from a user and interlock with desired information.

As typical methods for sensing touch stimuli from the outside by a touch panel, a capacitive method, a resistive film method, an electromagnetic induction method, and an optical method are known, and in recent years, a capacitive method is widely used.

Since such a touch panel needs to be able to detect information input by a touch method in the form of an electrical signal, it has a form including a sensing electrode for sensing a touch stimulus and a circuit unit for receiving a change in a signal generated by the sensing electrode. It is typical to be composed.

Meanwhile, the sensing electrodes generally have a structure in which each of the sensing electrodes is arranged in two directions (eg, a vertical direction and a transverse direction) in order to sense a coordinate to which a touch stimulus is applied.

However, when the sensing electrode is formed in an embossed shape on the touch panel substrate, the following problems may exist. First, it protrudes by the thickness of the sensing electrode, increasing the overall thickness of the product. Second, there is a problem in that cracks may frequently occur during processes such as cleaning.

In addition, in order to form the sensing electrode, after applying a conductive material such as ITO to the entire surface of the substrate, the conductive material existing in the region other than the region where the sensing electrode will be formed must be removed. As a result, material cost increases as well as a separate process. There is a problem that productivity decreases according to the addition of and the defect rate may increase.

In addition, when sensing electrodes extending in different directions are simultaneously formed on one surface of a single substrate, a cross region is inevitably generated, and since the sensing electrodes must be electrically insulated from each other in the cross region, there is a difficulty in complicating the process.

Korean Patent Laid-Open Publication No. 10-2013-0036936: Touch panel (2013.04.15)

The present invention was conceived to solve the problems of the prior art described above. According to an embodiment of the present invention, according to an embodiment of the present invention, a user forms an intaglio portion on one surface of a substrate on which a touch contact acts, and the intaglio portion By arranging the sensing electrode and the wiring inside, the thickness of the touch panel is reduced and durability of the sensing electrode is improved.

In addition, after applying the conductive material for forming the sensing electrode on the entire surface of the substrate, the conductive material is filled only inside the intaglio without removing the portion except for the sensing electrode area, thereby preventing waste of conductive material and reducing material cost. We want to simplify the process.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. will be.

According to an aspect of the present invention, a substrate; A first intaglio portion recessed from one surface of the substrate to the other surface than the one surface to extend in a first direction; A first sensing electrode formed on the first intaglio; And a second sensing electrode formed on the substrate. Including, a touch panel is provided.

In addition, a third intaglio portion is recessed from one surface of the substrate to the other surface than the one surface and extends in a second direction crossing the first direction; Further comprising, the second sensing electrode may be formed in the third intaglio.

Further, a first wiring connected to the first sensing electrode and formed on the substrate; And a second wiring connected to the second sensing electrode and formed on the substrate.

In addition, a second intaglio portion recessed from one surface of the substrate to the other surface than that of the one surface may be further included, and the first wiring may be formed in the second intaglio portion.

In addition, a fourth intaglio portion recessed from one surface of the substrate to the other surface than that of the one surface may be further included, and the second wiring may be formed in the fourth intaglio portion.

In addition, it may further include a printed layer formed on the surface of the substrate or the intaglio portion within the substrate.

In addition, the first wiring and the second wiring may be formed on the printed layer.

In addition, the substrate may be a rigid substrate.

In addition, the substrate may be a cover window.

In addition, the sensing electrode and the wiring may include Indium Tin Oxide (ITO), Carbon Nano Tube (CNT), Indium Zinc Oxide (IZO), Zinc Oxide (ZnO), graphene, conductive polymer, silver nanowire ( Ag nano wire), copper oxide (copper oxide) may be formed of at least one material.

In addition, the depth of the first intaglio portion compared to the thickness of the substrate may satisfy a relationship of 250:1 to 2.

According to another aspect of the present invention, a first substrate; A second substrate facing the first substrate; A first intaglio portion recessed from one surface of the first substrate to the other surface than the one surface to extend in a first direction; A first sensing electrode formed on the first intaglio; And a second sensing electrode formed on the second substrate.

In addition, a third intaglio portion is recessed from one surface of the second substrate to the other surface than the one surface and extends in a second direction crossing the first direction, wherein the second sensing electrode includes the third intaglio portion. Can be formed in

In addition, a first wiring connected to the first sensing electrode and formed on the first substrate; And a second wiring connected to the second sensing electrode and formed on the second substrate.

Further, a second intaglio portion recessed from one surface of the first substrate to the other surface than the one surface thereof, and the first wiring may be formed in the second intaglio portion.

In addition, a fourth intaglio portion that is recessed from one surface of the second substrate to the other surface than that of the one surface may be further included, and the second wiring may be formed in the fourth intaglio portion.

In addition, the first substrate may be a cover window.

In addition, the first substrate or the second substrate may be a rigid substrate.

In addition, the sensing electrode and the wiring may include Indium Tin Oxide (ITO), Carbon Nano Tube (CNT), Indium Zinc Oxide (IZO), Zinc Oxide (ZnO), graphene, conductive polymer, silver nanowire ( Ag nano wire), copper oxide (copper oxide) may be formed of at least one material.

In addition, the depth of the first intaglio portion compared to the thickness of the first substrate may satisfy a relationship of 250:1-2.

According to an embodiment of the present invention, according to an embodiment of the present invention, by forming an intaglio portion on one surface of a substrate on which a user touches a touch and disposing the sensing electrode in the intaglio portion, the thickness of the touch panel is reduced and durability of the sensing electrode Can improve.

In addition, after applying the conductive material for forming the sensing electrode on the entire surface of the substrate, the conductive material is filled only inside the intaglio without removing the portion except for the sensing electrode area, thereby preventing waste of conductive material and reducing material cost. The process can be simplified.

Meanwhile, the effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within a range that will be apparent to a person skilled in the art from the contents to be described below.

1 is a plan view of a touch panel according to a first exemplary embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along lines AA' and BB' of FIG. 1.
3 is a plan view of a touch panel according to a second exemplary embodiment of the present invention.
4 is a cross-sectional view taken along lines CC' and DD' of FIG. 3.
5 is a plan view of a touch panel according to a third exemplary embodiment of the present invention.
6 is a cross-sectional view taken along lines EE' and FF' of FIG. 5.
7 is a plan view of a touch panel according to a fourth exemplary embodiment of the present invention.
8 is a cross-sectional view taken along line GG' and H-H' of FIG. 7.
9 is an exemplary diagram illustrating image display devices to which a touch panel according to the present invention may be installed.
10 is a block diagram showing an exemplary configuration of an image display device according to the present invention.

The embodiments disclosed herein should not be construed or used as limiting the scope of the present invention. It is natural to those skilled in the art that the description including the embodiments of the present specification has various applications.

Therefore, unless limited by the claims, certain embodiments are illustrative for better describing the present invention, and it is not intended that the scope of the present invention be limited to the embodiments. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

On the other hand, the expression'including' certain elements simply refers to the existence of the elements as an expression of'open type', and should not be understood as excluding additional elements.

In addition, expressions such as'first, second', etc. are used only for distinguishing a plurality of components, and do not limit the order or other features between the components.

The term'engraved portion' described throughout the specification of the present invention refers to a space that is depressed from one side of the substrate toward the other side, and is not limited to terms such as indentations, holes, and grooves. In a substrate having an intaglio portion, the thickness of a region in which the intaglio portion is formed is thinner than that of a region in which the intaglio portion is not formed. A material forming the sensing electrode 100 and the wiring 20 is filled in the intaglio portion.

Briefly describing the touch window according to the present invention, the first embodiment relates to a touch panel having a structure in which all the sensing electrodes 110 and 120 are disposed on the intaglio portions 31 and 33 formed on a single substrate 10, The second embodiment relates to a touch panel having a structure in which some of the sensing electrodes 100 are disposed in a region in which the intaglio portion 31 of a single substrate 10 is formed, and the third embodiment relates to a touch panel of the sensing electrodes 100. A part of the touch panel is disposed on the surface of the second substrate 12 separate from the first substrate 11, and in the fourth embodiment, a part of the sensing electrode 100 is a first substrate 11 In addition, it relates to a touch panel having a structure disposed on an intaglio portion 33 formed on a separate second substrate 12.

Next, the common configuration of the touch panel according to the first to fourth embodiments of the present invention will be schematically described. First, the substrates 10, 11, and 12 shown in FIGS. 1 to 8 receive touch stimulation from the user. It is a configuration that accepts. Such substrates are, for example, polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (PES), cyclic olefin polymer (COC), It can be formed using various materials such as TAC (Triacetylcellulose) film, polyvinyl alcohol (PVA) film, polyimide (PI) film, polystyrene (PS), glass, tempered glass or rigid substrate. It is not particularly limited as long as it is a material having a predetermined strength or more.

The depth of the indentation from one side of the substrate 10,11,12 to the other side by the intaglio portions 31,32,33,34 may be 3.5μm or more and 4.5μm or less, and the depth of the intaglio portion compared to the thickness of the substrate is 250:1 Although it is desirable to satisfy the relationship of ~2, it is not limited thereto, and it is obvious that the touch panel may be designed to have various depths, and the depths of each intaglio may be the same or different from each other. The intaglio part is coated with DFR (Dry Film Photoresist) on one surface of the substrate, and after aligning the mask with an open area corresponding to the shape of the intaglio part to one surface of the substrate 10, laser is irradiated through the open area of the mask. It can be formed through various methods such as.

The sensing electrode 100 is formed in the screen area V/A to sense a touch stimulus caused by a person or an object. The sensing electrode 100 may be formed of a conductive polymer, and specifically, may be formed of polyaniline, polyacetylene, polyphenylenevinylene, or the like. In addition, materials such as ITO (indium-tin oxide), organic transparent electrode materials such as carbon nanotubes, graphene, ZnO (zinc oxide), and SnO ₂ (tin oxide) can be used. It is obvious that selection and change by those skilled in the art are possible. Further, the sensing electrode may be formed using various methods such as etching, photolithography, sputtering, or screen printing.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a plan view of a touch panel according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along lines A-A' and B-B' of FIG. 1.

1 and 2A, the touch panel according to the first embodiment of the present invention includes a substrate 10, a first intaglio portion 31, a second intaglio portion 32, a third intaglio portion 33, A fourth intaglio portion 34, a first sensing electrode 110, a second sensing electrode 120, a first wiring 21 and a second wiring 22 are included. In this case, the substrate 10 may be a rigid substrate or a cover window.

The first intaglio portion 31 is recessed from one side of the substrate 10 to the other side (ie, in the thickness direction) by a predetermined depth and extends in the first direction, and the third intaglio portion 33 is a substrate ( It is a configuration that extends in the second direction by recessing a predetermined depth in the thickness direction from the one surface of 10). Here, the first direction and the second direction may be, for example, a longitudinal direction and a transverse direction, respectively, and are preferably orthogonal to each other, but are not limited thereto.

The first sensing electrode 110 is formed on the first intaglio portion 31. Specifically, the first sensing electrode 110 is disposed on the first intaglio portion 31 extending in the first direction and extends in the first direction through the first intaglio portion 31.

The second sensing electrode 120 is formed on the third intaglio portion 33. Specifically, the second sensing electrode 120 is disposed on the third intaglio portion 33 extending in the second direction and extends in the second direction through the third intaglio portion 33.

In addition, the wiring 20 connected to the sensing electrode 100 may be formed on the substrate 10. Specifically, the wiring 20 may be formed in an embossed shape on the surface of the substrate 10 or formed in an intaglio portion. have. Hereinafter, a description will be made based on an embodiment in which the wiring 20 is formed on the intaglio portion.

The second intaglio portion 32 is recessed from one side of the substrate 10 to the other side by a predetermined depth to be connected to the first intaglio portion 31, and the fourth intaglio portion 34 is It is a configuration that is recessed from one surface to a predetermined depth in the thickness direction and connected to the third intaglio portion 33.

The first wiring 21 may be formed on the second intaglio portion 32. Specifically, the first wiring 21 is disposed on the second intaglio portion 32 connected to the first intaglio portion 31 and is electrically connected to the first sensing electrode 110. In addition, the second wiring 22 may be formed on the fourth concave portion 34. The second wiring 22 is disposed on the fourth intaglio portion 34 connected to the third intaglio portion 33 and is electrically connected to the second sensing electrode 120. In FIG. 2, both the first wiring 21 and the second wiring 22 are shown to be disposed on the intaglio portion, but the embodiment is not limited thereto, and only one of the first wiring lines 21 and the second wiring 22 may be disposed in the intaglio portion.

Referring to FIG. 2B, the touch panel according to an embodiment of the present invention may further include a cover window CW facing the substrate 10. In this case, the adhesive layer 50 may be formed between the substrate 10 and the cover window by using an optical clear adhesive (OCA) or the like for bonding the substrate 10 and the cover window.

1 and 2 show that the first sensing electrode 110 and the second sensing electrode 120 are formed in a first direction and a second direction, respectively. ) It is not limited to the shape, and may have various shapes such as bar, square, circle, and oval. The first sensing electrode 110 and the second sensing electrode 120 may serve as a driving electrode Tx and a sensing electrode Rx. As an example, the first sensing electrode 110 is a driving electrode ( Tx), the second sensing electrode 120 serves as a sensing electrode Rx, and when the first sensing electrode 110 serves as a sensing electrode Rx, the second sensing electrode 120 is a driving electrode ( Tx) can play a role.

At this time, when the first sensing electrode 110 and the second sensing electrode 120 are formed on the same surface of the substrate 10, unlike a structure formed on different surfaces, the first sensing electrode 110 and the second sensing electrode 110 Since the electrodes 120 extend in different directions, regions crossing each other inevitably occur. The insulating part 40 includes a first sensing electrode 110 and a second sensing electrode 200 in a region where the first sensing electrode 110 and the second sensing electrode 120 cross each other in a first direction and a second direction. It can be formed between. Specifically, referring to FIG. 2, in the first embodiment, since both the first sensing electrode 100 and the second sensing electrode 200 are formed on the same surface among both surfaces of a single substrate 10, the regions intersecting each other In order to insulate from, as shown in FIG. 2, an insulating portion 40 may be disposed between the first sensing electrode 110 and the second sensing electrode 120. In this case, bridge electrodes 121 for connecting the second sensing electrodes 120 spaced apart from each other in regions intersecting each other in the first direction and the second direction may be formed on each insulating portion 40.

The touch panel according to the first embodiment of the present invention improves durability by forming both the first sensing electrode 110 and the second sensing electrode 120 on the first and third concave portions 31 and 33, The thickness of the touch panel can be reduced by the thickness of the sensing electrode.

In addition, in the touch panel according to the first embodiment of the present invention, since the first wiring 21 and the second wiring 22 may be disposed on the second and fourth concave portions 32 and 34, according to the prior art Compared with a structure in which the wiring is disposed in a relief shape on the surface of the substrate, the thickness of the touch panel can be reduced by the thickness of the wiring, and reliability is improved by being indented into the inside of the substrate together with the sensing electrode.

Meanwhile, the touch panel according to the present invention may include a cover window CW, or the substrate 10 itself may be a cover window. The cover window may include a screen area V/A in which an image is displayed and a non-screen area D/A disposed at an edge of the screen area to surround the screen area. As shown in FIG. 2, a printed layer 60 may be formed in the non-screen area D/A of the cover window so that the wiring 20 connected to the sensing electrode 100 is not visible to the naked eye. The printing layer may have a color such as black, white, and blue, for example. The color of the printing layer is not limited thereto, and various colors are possible as long as the wiring 20 is not visible. The printed layer 60 may be formed on a separate concave portion in the substrate as shown in FIG. 2A or may be formed on the surface of the substrate as shown in FIG. 2B. In addition, since the wiring is formed on the above-described printing layer 60, it may not be recognized from the outside.

3 is a plan view of a touch panel according to a second exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along lines C-C' and D-D' of FIG. 3. The same reference numerals are used for the same components as those of the first embodiment described above with reference to FIGS. 1 and 2, and detailed descriptions thereof will be omitted.

3 and 4A, the touch panel according to the first embodiment of the present invention includes a substrate 10, a first intaglio portion 31, a second intaglio portion 32, a first sensing electrode 110, It includes a second sensing electrode 120, a first wiring 21 and a second wiring 22. In this case, the substrate 10 may be a rigid substrate or a cover window.

The first intaglio portion 31 according to the second embodiment is configured to be recessed from one side of the substrate 10 to the other side by a predetermined depth and extend in the first direction.

The first sensing electrode 110 is formed on the first intaglio portion 31. Specifically, the first sensing electrode 110 is disposed on the first intaglio portion 31 extending in the first direction and extends in the first direction through the first intaglio portion 31.

In addition, the wiring 20 connected to the sensing electrode 100 may be formed on the substrate 10. Specifically, the wiring 20 may be formed in an embossed shape on the surface of the substrate 10 or formed in an intaglio portion. have. Hereinafter, a description will be made based on an embodiment in which the wiring 20 is formed on the intaglio portion.

The first wiring 21 is formed on the second concave portion 32. Specifically, the second intaglio portion 32 is concave to a predetermined depth from the one side of the substrate 10 to the other side to be connected to the first intaglio portion 31, and the first wiring 21 is a first It is disposed on the second intaglio portion 32 connected to the intaglio portion 31 and is electrically connected to the first sensing electrode 110.

Compared with the first embodiment, the second sensing electrode 120 is common in that it is formed on the substrate 10, but differs in that it is formed in a second direction on a surface other than an intaglio portion. In addition, compared to the first embodiment, the second wiring 22 is common in that it is formed on the substrate 10, but is connected to the second sensing electrode 120 and disposed on the surface of the substrate 10. There is a difference.

Referring to FIG. 4B, the touch panel according to an exemplary embodiment of the present invention may further include a cover window CW facing the substrate 10. In this case, the adhesive layer 50 may be formed between the substrate 10 and the cover window CW by using an optical clear adhesive (OCA) or the like to bond the substrate 10 and the cover window CW.

Meanwhile, the printing layer 60 may be formed on a separate concave portion within the substrate as shown in FIG. 4A, or may be formed on the surface of the substrate as shown in FIG. 4B. In addition, since the wiring is formed on the above-described printing layer 60, it may not be visually recognized from the outside.

3 and 4 show that the first sensing electrode 110 and the second sensing electrode 120 are formed in a first direction and a second direction, respectively, in which unit cells having a diamond shape (a rhombus) are formed. ) It is not limited to the shape, and may have various shapes such as bar, square, circle, and oval.

As shown in FIG. 4, since the first sensing electrode 110 is disposed on the first intaglio portion 31 and the second sensing electrode 120 is disposed on the surface of the substrate 10, one surface of the substrate 10 The first sensing electrode 110 and the second sensing electrode 120 are formed on opposite sides of each other.

An insulating portion 40 is formed between the first sensing electrode 110 and the second sensing electrode 120 intersecting in the first and second directions, and each of the insulating portions 40 is formed on opposite sides with the insulating portion 40 as a boundary. The first sensing electrode 110 and the second sensing electrode 120 are disposed. Unlike the touch panel according to the first embodiment, since the first sensing electrode 110 and the second sensing electrode 120 are formed at different heights in the thickness direction of the substrate 10, only the insulating part 40 is used. The first sensing electrode 110 and the second sensing electrode 120 may be insulated from each other. Therefore, when compared to the structure in which both the first sensing electrode 110 and the second sensing electrode 120 are disposed on the first and third intaglios 31 and 33 formed on the same surface of the substrate, A separate bridge electrode 121 for connecting the second sensing electrodes 120 spaced apart from each other in regions crossing each other in the first direction and the second direction is unnecessary.

That is, the touch panel according to the second embodiment of the present invention can solve the problem of the prior art, in which the first sensing electrode 110 and the second sensing electrode 120 must be formed and then the bridge electrode 121 must be additionally formed. Accordingly, the touch panel manufacturing process can be simplified, and the thickness of the touch panel can be reduced and productivity can be improved.

5 is a plan view of a touch panel according to a third embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along lines E-E' and F-F' of FIG. 5.

5 and 6, the touch panel according to the third embodiment of the present invention includes a first substrate 11, a second substrate 12, a first engraved portion 31, and a second engraved portion 32. , A first sensing electrode 110, a second sensing electrode 120, a first wiring 21 and a second wiring 22. In this case, one of the first substrate 11 or the second substrate 12 may be a cover window.

The first intaglio portion 31 according to the third embodiment is configured to be recessed from one surface of the first substrate 11 to the other surface by a predetermined depth and extend in the first direction. The first sensing electrode 110 is formed on the first intaglio portion 31. Specifically, the first sensing electrode 110 is disposed on the first intaglio portion 31 extending in the first direction and extends in the first direction through the first intaglio portion 31.

The second substrate 12 is positioned to face the first substrate 11. The second substrate 12 may be formed of a material to which a material forming the second sensing electrode 120 may be applied, and may be formed of the same material as the first substrate 11 described above.

The second intaglio part 32 is concave to a predetermined depth from one side of the first substrate 11 on which the first intaglio part 31 is formed to the other surface to be connected to the first intaglio part 31 to be. The first wiring 21 may be disposed on the second intaglio portion 32. Meanwhile, since the first wiring 21 may be formed in an embossed shape on the surface of the first substrate 11, in this case, the second engraved portion 32 may be omitted.

The second sensing electrode 120 differs from the first and second embodiments in that it is formed in the second direction on the surface of the second substrate 12 rather than the first substrate 11 as shown in FIG. 6. have. Meanwhile, in FIG. 6, it is shown that the second sensing electrode 120 is formed on one surface of the second substrate 12 that faces one surface of the first substrate 10 on which the first intaglio portion 31 is formed. However, it is not limited thereto and it will be readily understood by those skilled in the art that it may be formed on the opposite surface.

In addition, the second wiring 22 is formed on the surface of the second substrate 12 on which the second sensing electrode 120 is formed and is connected to the second sensing electrode 120.

Referring to FIG. 6, an adhesive layer 50 may be formed between the first substrate 11 and the second substrate 12 using an optical clear adhesive (OCA) or the like. When the first substrate 11 and the second substrate 12 are laminated through the adhesive layer 50, the first sensing electrode 110 and the first wiring 21 are connected to the second sensing electrode 120 and the second wiring. (22) and can be mutually insulated.

Meanwhile, in FIGS. 5 and 6, the first sensing electrode 110 and the second sensing electrode 120 are shown to have a bar shape and are formed in a first direction and a second direction, respectively. ) It is not limited to the shape, and may have various shapes such as diamond (rhombus), square, circle, and oval.

7 is a plan view of a touch panel according to a fourth exemplary embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along lines G-G' and H-H' of FIG. 7. The same reference numerals are used for the same components as those of the third embodiment described above with reference to FIGS. 5 and 6, and detailed descriptions will be omitted.

7 and 8, the touch panel according to the fourth embodiment of the present invention includes a substrate 10, a second substrate 12, a first intaglio portion 31, a second intaglio portion 32, and It includes a 3 intaglio part 33, a fourth intaglio part 34, a first sensing electrode 110, a second sensing electrode 120, a first wiring 21 and a second wiring 22. In this case, one of the first substrate 11 or the second substrate 12 may be a cover window.

The touch panel according to the fourth exemplary embodiment has a structure further including a third intaglio portion 33 formed on one surface of the second substrate 12 in a second direction. Specifically, the third intaglio portion 33 is formed in the second direction by being recessed from one surface of the second substrate 12 to the other surface by a predetermined depth. Meanwhile, the second wiring 22 may be formed on the surface of the second substrate 12 in an embossed shape or formed in an intaglio portion. Hereinafter, a description will be made based on an embodiment in which the second wiring 22 is formed on the intaglio portion. The fourth intaglio portion 34 is concave to a predetermined depth from the same one surface of the second substrate 12 as the third intaglio portion 33 is formed to the other surface to be connected to the third intaglio portion 33 .

Although the first sensing electrode 110 and the second sensing electrode 120 are formed separately on the first and second substrates 11 and 12, respectively, they are common to the touch panel according to the third embodiment, but The difference is that the sensing electrode is disposed on the third intaglio portion 33 of the second substrate 12 and is not exposed to the outside. In addition, in FIG. 8, the second wiring 22 is shown to be disposed on the fourth intaglio portion 34 of the second substrate 12, but is not limited thereto, and the second wiring 22 is embossed on the surface of the second substrate 12. It can be formed as described above. In this case, the fourth intaglio portion 34 may be omitted.

In addition, referring to FIG. 8, an adhesive layer may be formed between the substrate and the transparent substrate 20 using an optical clear adhesive (OCA) in order to bond the first substrate 11 and the second substrate 12 together. .

7 and 8 show that the first sensing electrode 110 and the second sensing electrode 120 have a bar shape and are formed in a first direction and a second direction, respectively, but in a bar shape It is not limited to, and may have various shapes such as diamond (diamond), square, circle, and oval.

On the other hand, in FIGS. 2, 4, 6, and 8, the first to fourth concave portions 31, 32, 33, and 34 have a rectangular cross-section, but this is for convenience of explanation and In addition, it can be formed to have various shapes such as triangles, semicircles, and Vs. The touch panel according to the first to fourth embodiments described above has a structure in which all or a part of the sensing electrodes are disposed in an intaglio shape formed on the substrate itself, thereby improving the reliability of the sensing electrodes to improve the defect rate and at the same time excellent. Touch sensing performance can be secured. In addition, since the intaglio portion is formed directly on the surface of the substrate itself rather than a separate resin layer, there is an advantage of reducing material cost and simplifying the process.

9 is an exemplary diagram showing an image display device to which a touch panel according to the present invention may be installed, and FIG. 10 is a configuration diagram showing an exemplary configuration of an image display device according to the present invention.

The touch panel according to the embodiment of the present invention described above can be applied to various image display devices as shown in FIG. 9. For example, the touch panel according to the present invention can be applied to mobile image display devices such as smart phones, tablets, PDAs, notebooks, and digital cameras, and in addition to these mobile image display devices, smart TVs, PCs, digital picture frames, navigation, etc. It can be applied to various image display devices. That is, the touch panel according to an embodiment of the present invention may be applied to various image display devices that process touch input information and display image information.

Referring to FIG. 10, exemplary components that can be included in image display devices equipped with a touch panel according to the present invention can be described.

Specifically, the image display devices equipped with a touch panel according to the present invention include a communication unit 2 for transmitting and receiving data, an input information management unit 3 for managing information input through the touch panel, and the touch panel. An image information management unit 4 for managing image information, a storage unit 5 for storing various information related to the operation of the image display device, the communication unit, the input information management unit, and a control unit for controlling the operation of the image information management unit ( 6) may be included. In addition, the image display devices may include various components in addition to these components.

In addition, each component may be implemented with purely hardware or software, but may be implemented with a combination of various hardware and software components that perform the same function. In addition, two or more components may be implemented together by one piece of hardware or software, or one component may be implemented by two or more pieces of hardware or software.

Terms such as "include" described above, unless specifically stated to the contrary, means that the corresponding component can be embedded, so that other components may be further included rather than excluding other components. Should be interpreted as.

The embodiments of the present invention described above are disclosed for purposes of illustration, and the present invention is not limited thereto. In addition, those of ordinary skill in the technical field of the present invention will be able to make various modifications and changes within the spirit and scope of the present invention, and these modifications and changes should be viewed as belonging to the scope of the present invention.

10: substrate
11: first substrate
12: second substrate
20: wiring
21: first wiring
22: second wiring
31: first intaglio
32: second intaglio
33: third engraving
34: fourth engraving
40: insulation
50: adhesive layer
60: printed layer
100: sensing electrode
110: first sensing electrode
120: second sensing electrode
121: bridge electrode
2: Communication unit 3: Input information management unit
4: image information management unit 5: storage unit
6: control unit

Claims (20)

Board;
A first intaglio portion recessed from one surface of the substrate to the other surface than the one surface to extend in a first direction;
A first sensing electrode formed on the first intaglio;
A second sensing electrode formed on the substrate;
A first wiring connected to the first sensing electrode and formed on the substrate;
A second wiring connected to the second sensing electrode and formed on the substrate;
A second intaglio portion recessed from one surface of the substrate to the other surface than the one surface;
A third intaglio portion recessed from one surface of the substrate to the other surface than the one surface and extending in a second direction crossing the first direction;
A fourth intaglio portion recessed from one surface of the substrate to the other surface than the one surface; And
A printing layer formed on an intaglio portion recessed from one side of the substrate to the other side;
Including,
The first wiring is formed in the second concave portion,
The second wiring is formed on the fourth concave portion,
The second sensing electrode is formed on the third intaglio,
The intaglio portion on which the printing layer is formed overlaps with the second intaglio portion and the fourth intaglio portion,
Touch panel. The method of claim 1,
The first wiring and the second wiring,
Formed on the printing layer,
Touch panel. The method of claim 1,
The substrate,
Which is a rigid substrate,
Touch panel. The method of claim 1,
The substrate,
Cover window,
Touch panel. The method of claim 1,
The first sensing electrode, the second sensing electrode, the first wiring and the second wiring,
ITO(Indium Tin Oxide), CNT(Carbon Nano Tube), IZO(Indium Zinc Oxide), ZnO(Zinc Oxide), Graphene, Conductive Polymer, Ag nano wire, Copper Oxide ) Consisting of at least one of the substances,
Touch panel. The method of claim 1,
The depth of the first intaglio portion compared to the thickness of the substrate,
250: satisfying the relationship of 1-2,
Touch panel. A first substrate;
A second substrate facing the first substrate;
A first intaglio portion recessed from one surface of the first substrate to the other surface than the one surface to extend in a first direction;
A first sensing electrode formed on the first intaglio;
A second sensing electrode formed on the second substrate;
A second intaglio portion recessed from one surface of the first substrate to the other surface than the one surface;
A fourth intaglio portion recessed from one surface of the second substrate to the other surface than the one surface;
A first wiring connected to the first sensing electrode and formed on the first substrate;
A second wiring connected to the second sensing electrode and formed on the second substrate;
A printing layer formed on an intaglio portion recessed from one side of the first substrate to the other side;
Including,
The first wiring is formed in the second concave portion,
The intaglio portion on which the printing layer is formed overlaps with the second intaglio portion and the fourth intaglio portion,
The first wiring and the second wiring are formed on the printed layer,
The second wiring is formed in the fourth concave portion,
Touch panel. The method of claim 7,
A third intaglio portion recessed from one surface of the second substrate to the other surface than the one surface and extending in a second direction crossing the first direction;
Including more,
The second sensing electrode,
Formed on the third intaglio portion,
Touch panel. The method of claim 7,
The first substrate,
Cover window,
Touch panel. The method of claim 7,
The first substrate or the second substrate,
Which is a rigid substrate,
Touch panel. The method of claim 7,
The first sensing electrode, the second sensing electrode, the first wiring and the second wiring,
ITO(Indium Tin Oxide), CNT(Carbon Nano Tube), IZO(Indium Zinc Oxide), ZnO(Zinc Oxide), Graphene, Conductive Polymer, Ag nano wire, Copper Oxide ) Consisting of at least one of the substances,
Touch panel. The method of claim 7,
The depth of the first intaglio portion compared to the thickness of the first substrate,
250: satisfying the relationship of 1-2,
Touch panel. delete delete delete delete delete delete delete delete

Images