KR20110008715U - Touch panel having improved light transmittance - Google Patents

Abstract

The present invention relates to a high-permeability touch panel, the object of the present invention is to improve the light transmittance, process yield and product design through the multi-layered window screen configuration with a decorative layer therein, It is to provide a high-permeability touch panel that can be saved.
High-permeability touch panel according to the present invention is a high-permeability touch panel according to the present invention for achieving the above object is a first substrate formed with a transparent electrode on one surface; A touch panel comprising a window screen stacked on one side of the first substrate, wherein the window screen is attached to the transparent electrode on the first substrate by a second adhesive layer and a second substrate made of a transparent resin material. ; And a third substrate having a decorative layer formed on an edge portion of one side thereof and having an anti-reflective (AR / LR) coating layer laminated on the other side thereof by a first adhesive layer.

Description

High Permeability Touch Panel {TOUCH PANEL HAVING IMPROVED LIGHT TRANSMITTANCE}

The present invention relates to a touch panel, and more specifically, through a window screen structure having a multilayer structure so that a decorative layer is interposed therein, light transmittance, process yield, and product design can be improved, and manufacturing cost can be reduced. It relates to a high-permeability touch panel.

With the development of mobile communication and electronic devices, electronic information terminals such as mobile phones, PDAs, and navigation systems have become more diverse and complex media providing means such as audio, video, wireless internet web browsers, etc. Is expanding. For this reason, it is required to implement a larger display screen within the limited size of the electronic information terminal. Accordingly, a display device (touch window) using a touch panel is in the spotlight.

In general, the touch window is stacked on a display panel such as a liquid crystal display, a PDP, and the like, when a user presses the display screen while looking at the image display device, a corresponding signal is output to display a desired screen.

The display device to which the touch window is applied has an advantage of saving space compared to the conventional key input method by integrating the display screen and the signal input means. The touch window type electronic information terminal has a screen size and Since the convenience can be further increased, its use is increasing.

Types of such touch windows include capacitive overlay, resistive overlay, and infrared beam. In the early stage, the resistive film was mainly adopted, but recently, the adoption of the capacitive touch panel with excellent product reliability while increasing the excellent multi-touch function and simple internal structure is increasing.

1 is a cross-sectional view showing a conventional capacitive touch panel structure. Referring to FIG. 1, the conventional capacitive touch panel basically has a structure in which the lower substrate 2 and the window screen 6 are bonded to each other, and the touch panel is stacked on the display panel 1. The touch display device is configured.

An indium tin oxide (ITO) film is patterned on the upper surface of the lower substrate 2 as a transparent electrode 3. The window screen 6 is a hard coating (Hard Coating) layer 7 is treated on the upper surface to reinforce the surface hardness, and the decorative layer 5 is printed on the back edge portion of the company logo, letters, etc. are formed It is made to be seen from the outside.

As such, the upper surface of the lower sheet 2 on which the transparent electrode is formed and the rear surface of the window screen 6 on which the decorative layer 5 is formed are bonded to each other through the adhesive layer 4 to form a touch panel.

However, the conventional touch panel having the laminated structure as described above has the following problems.

Due to the difference in refractive index between the inner surface and the outer surface of the window screen, a lot of surface reflection occurs, resulting in poor light transmittance and poor clarity.

In addition, at least two functional coating layers (that is, a decorative layer on the inner side, a hard coating layer on the outer side, and an AR coating layer) must be formed on both sides of one film sheet (that is, the window screen), and the process becomes complicated. Inefficiency in the process management caused a problem that eventually has a limit in improving product yield.

In addition, the window screen of the conventional touch window has to be composed of a film sheet having a relatively thick thickness to ensure the support for the user's touch operation, the inner circumferential surface (that is, the side thickness portion) caused by such a thick thickness is It is exposed to the outside through the transparent window screen. Accordingly, the user can see the thickness of the inner surface through the front of the window screen, which has a problem of reducing the aesthetics of the product.

In addition, the conventional touch window has to be configured as a relatively thick thickness of the window screen as described above, wet (AR) anti-reflection (Wet) coating is not easy to form the anti-reflection coating layer in a dry manner. Dry antireflective coating is generally formed by physical method such as sputtering. Such dry antireflective coating is expensive to manufacture and above all, harder and more abrasion resistant than wet antireflective coating layer. And there is a disadvantage that the light transmittance is not good.

In addition, it is common to improve the surface hardness by forming a hard coating layer to protect the window screen from external stimuli. This hard coating layer significantly increases the product cost and causes yellowing and outgassing in the hard coating layer coating process. It was a major cause of process defects.

In addition, the conventional touch window is coated with a uniform thickness on the transparent electrode of the lower sheet (2) and then put the window screen 6 on which the decorative layer 5 is printed on it and at a uniform pressure and speed The window screen 6 and the lower sheet 2 are bonded to each other by pressing, and typically, an optically clear adhesive (OCA) is used as the adhesive. However, when the adhesive 4 such as OCA is used in bonding the window screen 6 and the lower sheet 2 on which the decorative layer 5 is printed as described above, product defects may occur. That is, the decorative layer 5 is printed along one edge of the window screen 6 to form a step with the other surface (hereinafter, non-decorated surface) on which the decorative layer 5 is not formed. When the window screen forming the step is placed on the pressure-sensitive adhesive on a flat surface and pressed at a predetermined pressure, a space is formed between the non-decorative surface and the transparent adhesive to concentrate the load on the non-decorative surface, which is a decorative layer (5). There was a problem caused by product defects such as distortion of.

The present invention has been made to solve the above problems, the object of the present invention is to provide a high-permeability touch panel that can maximize the light transmittance of the panel through a window screen structure that can easily perform wet reflection coating. will be.

Another object of the present invention is to provide a high-permeability touch panel that can more efficiently perform the touch panel manufacturing and management process and also improve the product yield.

Still another object of the present invention is to provide a high-permeability touch panel that can achieve cost reduction and process defect reduction by presenting a touch panel structure that can replace the hard coating that has been performed on the outer surface of a conventional window screen.

Another object of the present invention is to provide a high-permeability touch panel that can improve the design of the product through a touch panel structure that can shield the inner peripheral surface of the window screen exposed to the front of the window screen.

Another object of the present invention is to provide a high-permeability touch panel that can prevent the decorative layer defects caused when the conventional window screen and the lower sheet is bonded.

High-permeability touch panel according to the present invention for achieving the above object is a first substrate formed with a transparent electrode on one surface; A touch panel comprising a window screen stacked on one side of the first substrate, wherein the window screen is attached to the transparent electrode on the first substrate by a second adhesive layer and a second substrate made of a transparent resin material. ; And a third substrate having a decorative layer formed on an edge portion of one side thereof and having an anti-reflective (AR / LR) coating layer laminated on the other side thereof by a first adhesive layer.

According to the high-permeability touch panel according to the present invention, through the multi-layered window screen configuration having a decorative layer therein, it is easy to form a wet anti-reflection (AR / LR) coating layer on the outer surface of the window screen to increase the light transmittance It is possible to complete the touch panel by forming a variety of functional coating layers on each substrate separately and then bonding them to facilitate the manufacturing process and process management, improve product yield, and relatively thick thickness Since the inner circumferential surface of the second substrate having is shielded by the decorative layer printed on the rear surface of the third substrate which can be configured to have a thin thickness, there is a remarkable effect that the design of the product can be improved since it is not exposed to the front portion.

In addition, the window screen of the present invention is formed by coating a third substrate stacked on the second substrate and the third substrate in a wet manner, so that the anti-reflective coating layer having excellent wear resistance replaces the function of the hard coating layer of the conventional window screen. Hard coating is unnecessary, and thus, yellowing and outgassing, which have occurred in a process of forming a hard coating layer on a window screen, can be reduced, thereby reducing process defects and reducing costs.

In addition, since the reflectance of the external light is reduced by the anti-reflective coating layers provided on the upper and rear surfaces of the touch panel, the visibility of the transparent electrode pattern may be lowered, thereby improving the beauty of the product.

In addition, by forming the first adhesive layer bonding the second substrate and the second substrate on which the decorative layer is formed with a heat curable or UV curable resin, imparting firm adhesion and preventing occurrence of product defects such as twisting or warping of the decorative layer. That has a remarkable effect.

1 is a cross-sectional view showing a conventional capacitive touch panel structure.
2 is a cross-sectional view schematically showing the structure of a high-permeability touch panel according to a first embodiment of the present invention.
3 is a plan view of an electronic terminal having a high-permeability touch panel according to the present invention;
Figure 4 is a perspective view showing the inner circumferential surface of the window screen that was conventionally observed from the front portion.
5 is a perspective view showing a window screen of a multilayer structure according to the present invention.
6 is a cross-sectional view schematically showing the structure of a high-permeability touch panel according to a second embodiment of the present invention.
7 is a cross-sectional view schematically showing the structure of a high-permeability touch panel according to a third embodiment of the present invention.

The high-permeability touch panel according to the present invention is located above the display panel 1 which is responsible for outputting visual information. In particular, the high-permeability touch panel is a window screen having a multilayer structure in which a touch panel capable of directly inputting data by a user's touch is configured. Through the configuration, the optical performance (light transmittance) of the touch display device can be improved, the thickness of the inner surface of the window screen is not exposed, and expensive hard coating does not require unnecessary technical features.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment, advantages and features of the present invention.

2 is a cross-sectional view schematically illustrating the structure of a high-permeability touch panel according to a first embodiment of the present invention, and FIG. 3 is a plan view of an electronic terminal having a high-permeability touch panel according to the present invention.

According to a preferred embodiment of the present invention, a touch panel includes a first substrate 10, a transparent electrode 20 formed on a pattern on the first substrate 10, and a second adhesive layer 30. (20) a window screen bonded to an upper portion, wherein the window screen includes a second substrate 40 and a third substrate 60 stacked on the second substrate 40, and the second substrate ( The decorative layer 50 and the first adhesive layer 35 are interposed between the 40 and the third substrate 60, and the anti-reflective coating layer 70 is formed on the upper surface of the third substrate 60. consist of.

Referring to FIG. 2, the first substrate 10 is stacked and coupled to an upper portion of the display panel. For example, if the display panel is a liquid crystal display device in which a liquid crystal is injected between the upper substrate and the lower substrate, it will be stacked on the upper surface of the upper substrate.

The first substrate 10 is composed of a transparent material having a thickness in the range of 0.05mm to 0.25mm, the transparent material may be applied to a resin film or glass substrate. In the case of the resin film, it is preferable to use a polymer resin film such as polyethylene resin (PET: PolyEthylene Terephtalate) or acrylic (Acryl), but is not necessarily limited thereto.

The transparent electrode 20 is patterned on one side of the first substrate 10 in a specific shape, and includes a transparent conductive material, preferably indium tin oxide (ITO) or antimony tin oxide (ATO). Antimon Tin Oxide).

The first substrate 10 has a touch screen region (FIG. 3: K1) in which the transparent electrode 20 is patterned and an inactive region (FIG. 3: K2) except for the touch screen region, and touches on the inactive region K2. Electrode wirings for input and output of signals are formed and electrically connected to the transparent electrode 20. The electrode wirings are connected to a FPC (Flexible Printed Circuit) (FPC) through conductor pins. Bonded to the first substrate 10.

The window screen including the second substrate 40 and the third substrate 60 is disposed above the first substrate 10. The second substrate 40 corresponds to a resin film in a flat form bonded to one side of the first substrate 10 on which the transparent electrode 20 is formed.

The resin film constituting the second substrate 40 is made of a transparent resin material, for example, using a transparent polymer resin film such as polycarbonate (PC), polymethyl methacrylate (PMMA) or polyethylene resin (PET). It is preferred to form to have a thickness in the range from mm to 5.0 mm.

In addition, the second substrate 40 is laminated on one side of the first substrate 10 through the second adhesive layer 30, the second adhesive layer 30 is applied to a thickness of about 25㎛ And an adhesive made of transparent material. As the transparent adhesive, it is preferable to use an optically clear adhesive (OCA). Optical transparent adhesive (OCA) has the advantage of ensuring a similar transmittance of glass, and improves the screen sharpness compared to the tape-type adhesive, and also excellent adhesiveness.

The third substrate 60 of the present invention is one of the main technical features of the present invention, and the third substrate 60 forms a window screen together with the second substrate 40, and the second substrate 40 and the second substrate 40. The decorative layer 50 and the first adhesive layer 35 are interposed between the three substrates 60.

The third substrate 60 is a film sheet using a transparent resin material, it is configured to have a thickness in the range of 0.05mm to 0.25mm, the resin material is preferably a polymer resin such as polyethylene resin (PET), but not necessarily It is not limited.

The third substrate 60 is laminated on the upper side of the second substrate 40 bonded to the upper portion of the first substrate 10 through the first adhesive layer 35, thereby completing the manufacture of the touch panel. The adhesive layer 35 uses an adhesive made of a transparent material.

As described above, the third substrate 60 is attached to the second substrate 40 through the first adhesive layer 35 to form a window screen (that is, the second substrate 60). When the 40 and the third substrate 60 are bonded to each other, a process of forming the decorative layer 50 on one side of the third substrate 60 facing the adhesive surface of the second substrate 40 is preceded.

The decorative layer 50 is composed of a multi oxide layer 51 and a printed layer 53. The print layer 53 is an icon (for example, a company logo, a letter, a pattern, etc.) printed on the inside of the window screen to realize a predetermined color and shape. The bar can be visually recognized by the user in front of the window screen. The decorative layer 50 is generally formed in the inactive region K2, and is specifically printed on the multi-oxide layer 51 deposited on the edge of the back surface of the third substrate 60 to be in the range of 7 μm to 15 μm. To form a thickness of.

The multi-oxide layer 51 is formed of a thin film layer composed of a plurality of thin layers by depositing an oxide layer on the back surface of the third substrate 60. The multi-oxide layer 51 allows the printed layer 53 to be efficiently printed on the third substrate 60 and prevents light reflection or distortion on the window screen surface, regardless of time and place. Instead, it plays a role in making a clear printed layer (ie, icon) visible from the outside.

As described above, the decorative layer 50 is printed on the rear surface of the third substrate 60 along the edge thereof to form a step with the other surface (hereinafter, non-decorated surface) where the decorative layer 50 is not formed. . Therefore, when an optically clear adhesive (OCA) used as a general touch panel adhesive layer is used as the first adhesive layer, a gel state in which a third substrate 60 forming a step is formed in a plane is formed. When placed on the optically clear adhesive of the space formed between the non-decorated surface and the transparent adhesive is formed. The floated space is then concentrated when the load is pressed at a predetermined pressure for bonding of the second substrate and the third substrate, causing product defects such as twisting of the decorative layer 50.

In the high-permeability touch panel according to the preferred embodiment of the present invention, in order to prevent the occurrence of such decorative layer defects, the third substrate 60 on which the decorative layer is formed is heat curable, ultraviolet (UV) curable, without using a transparent adhesive such as OCA, The first adhesive layer was formed using at least one selected from room temperature curable and heat-ultraviolet curable adhesives (hereinafter, referred to as a first adhesive).

Heat curable adhesive means that it hardens when the high temperature heat is applied to the liquid type adhesive, and imparts adhesion. UV curable adhesive means hardening and imparts adhesion when irradiated with ultraviolet rays to the liquid type adhesive. In order to cure the liquid-type adhesive by satisfying the specific conditions in, heat-ultraviolet ray curability means curing by irradiating ultraviolet rays simultaneously while applying a high temperature heat.

The thermosetting adhesive uses a resin system having transparency, and a mixed material such as an acrylic resin, an epoxy resin or an epoxy acrylate may also be used. The UV curable adhesive may use a resin having transparency, and for example, an adhesive including a UV polymerizable oligomer, a reactive diluent, an additive, a photopolymerization initiator, or the like may be used. In addition, when using an ultraviolet curable adhesive, a thermosetting adhesive can be mixed and used in the area | region where ultraviolet permeation | transmission is not smooth, such as the area | region (the non-transparent adherend area | region) in which the decorative layer 50 was formed.

Hereinafter, by applying a first adhesive including a thermosetting and UV curable adhesive, a process of bonding the third substrate and the second substrate without causing a decorative layer defect will be briefly described.

The first adhesive layer 35 of the present invention is formed between the second substrate 40 and the third substrate 60 to adhere the second substrate 40 and the third substrate 60. Specifically, when the first adhesive in a liquid state is uniformly coated on the upper surface of the second substrate 40 and then the third substrate 60 having the decorative layer is placed thereon, an optically clear adhesive (OCA) is applied. Unlike when applied, no floating space is generated between the first adhesive applied to the second substrate 40 and the non-decorative surface of the third substrate 60, which is a space generated by the non-decorative surface. This is because the first adhesive can compensate.

In other words, when the first adhesive is applied on the second substrate 40 and the third substrate 60 is placed thereon, a process of pressing at a uniform pressure (about 27 kgf) and a speed is performed. The first adhesive is in a liquid type. In the pressing process, the liquid first adhesive naturally fills the space generated by the non-decorated surface, and irradiates ultraviolet rays in the state where the space is filled by the first adhesive. When the first adhesive layer 35 is formed by applying heat, there is an advantage in that product defects such as torsion or warping of the decorative layer may be prevented while providing firm adhesion.

As described above, prior to bonding the third substrate 60 to the second substrate 40, a process of forming the decorative layer 50 on the rear surface of the third substrate 60 is preceded. The anti-reflection (AR: anti-reflection or LR: low-reflection) coating layer 70 formation process is further performed along with the formation.

The antireflective coating layer 70 is a film thin film for securing visibility from external reflection, and the wet type antireflective coating is cured after applying a polymer solution composition consisting of a solvent and an additive to the upper surface of the third substrate 60. This wet type anti-reflective coating method is a well-known technique and will not be described in detail.

When the process of forming the decorative layer 50 on the rear surface of the third substrate 60 of the present invention and the anti-reflective coating layer 70 on the upper surface is completed, the first adhesive on one side of the second substrate 40 Is applied and the back surface of the third substrate 60 on which the decorative layer 50 is formed is laminated and cured, thereby manufacturing the window screen of the touch panel.

As described above, the touch panel of the present invention can easily form the anti-reflective coating layer 70 on the front surface of the third substrate 60 in a wet manner, thereby reducing the reflection loss caused by the window screen to 99% or more. There is an excellent effect to implement a touch panel having a high transmittance.

In the case of the conventional touch panel, the window sheet having a single layer structure (FIG. 1: 6) is formed, and the film sheet constituting the window screen 6 has to secure a predetermined thickness. Anti-reflective (AR) coating was not easy. Accordingly, there is a disadvantage in that the AR coating layer 70 is formed by a dry method (PVD), which is relatively low in hardness and wear resistance, does not have high transmittance, and is expensive in manufacturing, compared to the wet antireflective coating layer.

However, the high-permeability touch panel of the present invention comprises a window screen having a multilayer structure, and each functional coating layer on each film sheet layer (that is, the second substrate 40 and the third substrate 60) constituting the multilayer structure. (That is, the anti-reflective coating layer, the decorative layer) has a structure that is bonded to the first adhesive layer 35 after separately forming, there is an advantage that can easily form the anti-reflective coating layer 70 of the wet method.

That is, the conventional window screen (FIG. 1: 6) had to form an anti-reflective coating layer on the film sheet having a thick thickness in the range of 0.2 mm to 5.0 mm, but the window screen of the present invention is separately manufactured with the second substrate 40 Since the third substrate 60 has a multilayer structure in which the third substrate 60 is bonded, the third substrate 60 constituting the front surface of the window screen may be formed of a thin and flexible film sheet having a thickness of 0.05 to 0.25 mm, and thus is reflected in a wet manner. It is advantageous in forming the anti-coat layer 70 to realize a touch panel having a high transmittance and excellent wear resistance of 99% or more.

In addition, as the window screen is configured as a multilayer structure, a decorative layer (FIG. 1: 5) is formed between the substrate (FIG. 1: 3) on which the transparent electrode (FIG. 1: 3) is formed and the rear surface of the window screen (FIG. 1: 6). It is possible to form the decorative layer 50 of the touch panel inside the window screen, away from the conventional touch panel structure that had to form.

Accordingly, as shown in FIG. 4, the inner circumferential surface of the window screen 6 (that is, the inner thickness portion D1) is exposed on the front surface, so that the user can recognize the inner circumferential surface D1 even from the front of the product. Unlike the window screen of FIG. 5, the inner circumferential surface of the second substrate 40 (that is, corresponding to the conventional single-layer window screen (FIG. 1) 6) of FIG. It is covered by the decorative layer 50 printed on the back surface is not exposed to the front portion provides an advantage that can improve the design of the product.

That is, the conventional window screen 6 and the second substrate 40 of the present invention are the same as forming a relatively thick inner thickness enough to be visually recognized by the user, but in the case of the present invention, the third substrate 60 The decorative layer provided on the back of the) has the effect of covering the side thickness portion of the second substrate 40, the third substrate 60 can be configured to a relatively thin thickness in the range of 0.05mm to 0.25mm third substrate (60) The side thickness portion of itself is hardly recognizable by the user, thereby improving the aesthetics of the product.

6 is a cross-sectional view schematically showing the structure of a high-permeability touch panel according to a second embodiment of the present invention.

The high-permeability touch panel according to the second embodiment of the present invention, in the touch panel manufactured through the first embodiment, is further provided with another anti-reflective coating layer 75 on the rear surface of the first substrate 10. It is done.

As shown in FIG. 6, after forming the anti-reflective coating layer 70 provided on the upper surface of the third substrate 60 of the first embodiment on the rear surface of the first substrate 10 in the same manner, the display panel 1 Anti-reflective coating layers 70 and 75 are provided on both the front and rear surfaces of the touch panel by stacking them on the substrate, thereby greatly improving the light transmittance of the touch panel, thereby realizing a clear screen, and reducing the reflectance of external light. It is possible to lower the visibility of the transparent electrode pattern pattern has the advantage of improving the beauty of the product.

7 is a cross-sectional view schematically showing the structure of a high-permeability touch panel according to a third embodiment of the present invention.

The high-permeability touch panel according to the third embodiment of the present invention further includes a fourth substrate 80 attached to the rear surface of the first substrate 10 through a predetermined third adhesive layer 37. The fourth substrate 80 is a film sheet of a transparent resin material, the resin material is preferably polyethylene resin (PET) and the film sheet is preferably configured to a thickness of 0.05mm to 0.25mm range. In addition, the third adhesive layer 37 may use an optical clear adhesive (OCA).

In the third embodiment, after the antireflective (AR / LR) coating layer 77 is formed on the back surface of another substrate (ie, the fourth substrate) in a wet manner, the wet antireflective coating layer 77 is formed. The fourth substrate 80 is attached to the first substrate 10 through the third adhesive layer 37 to complete the touch panel.

Accordingly, a more improved transmittance is ensured than in the first embodiment, and a functional coating (ie, a transparent electrode on one side and an anti-reflective coating on the other side) on both sides of one substrate (ie, the first substrate 10). The manufacturing process and the process management is easier than the second embodiment to be carried out there is an advantage to improve the product yield.

As described above, the high-permeability touch panel of the present invention can maximize the light transmittance through the multi-layered window screen configuration in which the decorative layer 50 is interposed therein, further improving the process yield, and the window screen. Since the inner side of the thick portion is not exposed, the excellent design is excellent effect.

In addition, the window screen of the present invention is a coating method formed on the third substrate 60 and the third substrate stacked on the second substrate 40 in a wet manner, so that the anti-reflective coating layer having excellent wear resistance functions as a hard coating layer of the conventional window screen. As a result, it is not necessary to use expensive hard coating, and thus, yellowing and outgassing, which have occurred in a process of forming a hard coating layer on a window screen, can be reduced, thereby reducing process defects and manufacturing costs. Provide advantages.

For reference, Table 1 is a comparison data for each characteristic of the conventional touch panel and the touch panel according to the present invention.

characteristic Conventional touch panel Invented touch panel Remarks Tempered Glass Type PMMA type Transmittance 91.5 91.5 93.1 Visible light Relative price 100 33 29.7 Based on 100 won tempered glass Thickness adjustable Ha medium Prize Easy fabric thickness adjustment Shape Machinability (Hand) Phase (NC available) Phase (NC available) weight 2.5 1.2 1.2 Same thickness standard Safety (Scattering) Low (scattered) High (no scattering) High (no scattering)

In Table 1, the term "tempered glass type" of the conventional touch panel refers to a conventional touch panel having the configuration and lamination structure of FIG. 1 described above, and made of a window screen made of tempered glass material, and the term "PMMA type" of FIG. It refers to a conventional touch panel having a configuration and a laminated structure, but consisting of a window screen made of PMMA material.

As can be seen from Table 1, the touch panel of the present invention has a high impact resistance and safety without scattering compared to the conventional touch panel that uses tempered glass material as a window screen, and has a relatively high light transmittance, light weight, and easy thickness control. There is one advantage. In addition, the NC workability is excellent, the new product has the advantage of free shape design.

While the preferred embodiments of the present invention have been described and illustrated using specific terms, such terms are only for clarity of the present invention, and the embodiments and the described terms of the present invention are intended to describe the spirit and scope of the following claims. It is obvious that various changes and changes can be made without departing from the scope.

For example, in the above description, the multilayered window screen of the present invention is described and illustrated by applying to a capacitive touch panel, but it is apparent to those skilled in the art that the multilayered window screen can be applied to a resistive touch panel as it is.

In addition, in the above preferred embodiment, the first adhesive layer is formed using a heat curable adhesive, an ultraviolet (UV) curable adhesive, or the like, but an optically clear adhesive (OCA) may be used like the second adhesive layer.

Such modified embodiments should not be understood individually from the spirit and scope of the present invention, but should fall within the claims of the present invention.

1 display panel 10 first substrate
20: transparent electrode 30: second adhesive layer
35: first adhesive layer 37: third adhesive layer
40: second substrate 50: decorative layer
51: multi oxide layer 53: printed layer
60: third substrate 70, 75, 77: antireflective coating layer 80: fourth substrate

Claims (10)

A first substrate having a transparent electrode formed on one surface thereof; In the touch panel comprising a window screen stacked on one side of the first substrate,
The window screen
A second substrate attached to the transparent electrode on the first substrate by a second adhesive layer and made of a transparent resin material; A high-permeability touch panel, wherein a third substrate having a decorative layer formed on an edge portion of one side forms a multilayer structure bonded by a first adhesive layer interposed between the second substrate and the third substrate.
The method according to claim 1,
High-permeability touch panel, characterized in that the anti-reflective (AR / LR) coating layer is laminated on the other side of the third substrate.
The method according to claim 1,
The first adhesive layer is
A high-permeability touch panel formed using at least one selected from a heat curable adhesive, an ultraviolet (UV) curable adhesive, a room temperature curable adhesive, and a heat-ultraviolet curable adhesive.
The method according to claim 1,
The resin material constituting the third substrate is polyethylene resin (PET),
The third substrate is a high penetration touch panel, characterized in that consisting of a thickness in the range of 0.05mm to 0.25mm.
The method according to claim 1,
The resin material constituting the second substrate is at least one selected from polycarbonate (PC), polymethyl methacrylate (PMMA), and polyethylene resin (PET),
The second substrate is a high transmissive touch panel, characterized in that consisting of a thickness in the range of 0.2mm to 5.0mm.
The method of claim 2,
The antireflective coating layer is a high penetration touch panel, characterized in that the wet (Wet) antireflective coating layer.
The method according to claim 1,
The decoration layer
A multi-oxide layer composed of a plurality of thin film layers by depositing an oxide layer on one side of the third substrate; And
A high-permeability touch panel comprising a printed layer printed on one side of the multi-oxide layer in a predetermined color and pattern.
The method according to claim 1,
The second adhesive layer is a high transparent touch panel, characterized in that the optical transparent adhesive (OCA).
The method according to claim 1,
The high-permeability touch panel further comprises an anti-reflection (AR / LR) coating layer laminated on the other side of the first substrate.
The method according to claim 1,
A fourth substrate attached to the other side of the first substrate by a third adhesive layer and made of a transparent resin material; And
The high-permeability touch panel further comprises an anti-reflection (AR / LR) coating layer laminated on the rear surface of the fourth substrate.

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