KR20120056464A - Touch panel and method for manufacturing the same - Google Patents

Touch panel and method for manufacturing the same Download PDF

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Publication number
KR20120056464A
KR20120056464A KR1020100118018A KR20100118018A KR20120056464A KR 20120056464 A KR20120056464 A KR 20120056464A KR 1020100118018 A KR1020100118018 A KR 1020100118018A KR 20100118018 A KR20100118018 A KR 20100118018A KR 20120056464 A KR20120056464 A KR 20120056464A
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KR
South Korea
Prior art keywords
electrode pattern
transparent electrode
touch panel
color
color change
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KR1020100118018A
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Korean (ko)
Inventor
김운천
오용수
이종영
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삼성전기주식회사
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Priority to KR1020100118018A priority Critical patent/KR20120056464A/en
Publication of KR20120056464A publication Critical patent/KR20120056464A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making

Abstract

The present invention relates to a touch panel and a method of manufacturing the same, wherein the touch panel 100 has a transparent substrate 110, a color change layer 120 formed on the transparent substrate 110, and an opening 135 in the color change layer 120. The patterned transparent electrode pattern 130 is formed, and the color change layer 120 is transparent, but the color change layer 123 exposed from the opening 135 reacts with the basic material to correspond to the color of the transparent electrode pattern 130. And discolor the layer 123 exposed from the opening 135 of the transparent electrode pattern 130 to correspond to the color of the transparent electrode pattern 130 so that the user changes the transparent electrode pattern 130. By not recognizing, there is an effect of improving the visibility of the touch panel 100.

Description

Touch panel and method for manufacturing the same

The present invention relates to a touch panel and a method of manufacturing the same.

As computers using digital technology are developed, auxiliary devices of computers are being developed together. Personal computers, portable transmission devices, and other personal information processing devices use various input devices such as a keyboard and a mouse. To perform text and graphics processing.

However, as the use of computers is gradually increasing due to the rapid progress of the information society, there is a problem that it is difficult to efficiently operate a product by using only a keyboard and a mouse which are currently playing an input device. Therefore, there is an increasing need for a device that is simple and less error-prone, and that allows anyone to easily input information.

In addition, the technology related to the input device is shifting to high reliability, durability, innovation, design and processing related technology beyond the level that meets the general function, and in order to achieve this purpose, information input such as text, graphics, etc. Touch panel has been developed as a possible input device.

The touch panel is a display surface of an electronic organizer, a liquid crystal display device (LCD), a flat panel display device such as a plasma display panel (PDP), an electroluminescence (El), and an image display device such as a cathode ray tube (CRT). Is a tool used to allow a user to select desired information while viewing the image display apparatus.

The touch panel types include resistive type, capacitive type, electro-magnetic type, SAW type, surface acoustic wave type, and infrared type. Type). These various touch panels are adopted in electronic products in consideration of the problems of signal amplification, difference in resolution, difficulty of design and processing technology, optical characteristics, electrical characteristics, mechanical characteristics, environmental characteristics, input characteristics, durability, and economics. Currently, the most popular methods are capacitive touch panels capable of multi-touch and digital resistive touch panels.

However, in the capacitive touch panel and the digital resistive touch panel according to the prior art, the shape of the transparent electrode pattern is recognized by the user because the transparent electrode pattern has a unique color. For example, when the transparent electrode pattern is patterned into a bar, the user recognizes the bar shape, and when the transparent electrode pattern is patterned into a rhombus, the user recognizes the rhombus shape. Therefore, the touch panel according to the related art has a problem that not only the image output from the image display device is disturbed due to the transparent electrode pattern, but also the overall visibility is lowered.

The present invention has been made to solve the above problems, an object of the present invention by adopting a discoloration layer that changes color by reacting with a basic material or an acidic material, the user can not recognize the transparent electrode pattern touch panel and touch It is to provide a method for producing a panel.

A touch panel according to a first embodiment of the present invention includes a transparent substrate, a color change layer formed on the transparent substrate, and a transparent electrode pattern formed to have an opening in the color change layer, wherein the color change layer is transparent, but the opening The color fading layer exposed from the color change to react with the basic material to correspond to the color of the transparent electrode pattern.

The transparent electrode pattern is formed of a conductive polymer including poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene.

In addition, the color change layer is characterized in that it comprises thymolphthalein.

In addition, the color change layer is characterized in that it comprises an adhesive component.

In addition, the basic substance is characterized in that the ammonia gas or ammonia water.

A touch panel according to a second exemplary embodiment of the present invention includes a transparent substrate, a color change layer formed on the transparent substrate, and a transparent electrode pattern formed to have an opening in the color change layer, wherein the color change layer is formed of the transparent electrode pattern. Corresponding to the color, the portion corresponding to the transparent electrode pattern is characterized in that the discoloration is transparent by reacting with the acidic material.

The transparent electrode pattern is formed of a conductive polymer including poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene.

In addition, the color change layer is characterized in that it comprises an adhesive component.

In addition, the acidic material is characterized in that the chlorine gas or received from the transparent electrode pattern formed of poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS).

A method of manufacturing a touch panel according to a first preferred embodiment of the present invention includes the steps of (A) forming a color change layer on a transparent substrate, (B) forming a transparent electrode pattern patterned to have an opening in the color change layer; C) discoloring the color change layer corresponding to the color of the transparent electrode pattern by reacting the color change layer exposed from the opening of the transparent color change layer with a basic material.

Here, in the step (B), the transparent electrode pattern is a conductive polymer containing poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene Characterized in that formed.

In addition, in the step (A), the color change layer is characterized in that it comprises thymolphthalein.

In addition, the color change layer is characterized in that it comprises an adhesive component.

In addition, in the step (C), the basic material is characterized in that the ammonia gas or ammonia water.

A method of manufacturing a touch panel according to a second preferred embodiment of the present invention includes the steps of (A) forming a color change layer on a transparent substrate, (B) forming a transparent electrode pattern patterned to have an opening in the color change layer; And c) reacting a portion of the discoloration layer corresponding to the color of the transparent electrode pattern corresponding to the transparent electrode pattern with an acidic material to transparently discolor the color.

Here, in the step (B), the transparent electrode pattern is a conductive polymer containing poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene Characterized in that formed.

In addition, the color change layer is characterized in that it comprises an adhesive component.

Further, in the step (C), the acidic material is characterized in that the chlorine gas or received from the transparent electrode pattern formed of poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS).

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to this, the terms or words used in this specification and claims are not to be interpreted in a conventional and dictionary sense, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

According to the present invention, after the transparent electrode pattern is formed on the transparent discoloration layer, only the discoloration layer exposed from the opening of the transparent electrode pattern is discolored to correspond to the color of the transparent electrode pattern, thereby eliminating the color difference between the transparent electrode pattern and the opening, There is an effect that can improve the visibility of the touch panel.

In addition, according to the present invention, after forming the transparent electrode pattern on the color change layer corresponding to the color of the transparent electrode pattern, the color of the portion corresponding to the transparent electrode pattern of the color change layer by transparently discoloring between the transparent electrode pattern and the opening By eliminating the color difference, there is an advantage that can improve the visibility of the touch panel.

1 is a cross-sectional view of a touch panel according to a first preferred embodiment of the present invention;
FIG. 2 is a perspective view of the touch panel of FIG. 1;
3 to 5 are cross-sectional views of the touch panel fabricated using the first preferred embodiment of the present invention.
6 is a cross-sectional view of a touch panel according to a second preferred embodiment of the present invention;
FIG. 7 is a perspective view of the touch panel of FIG. 6;
8 to 10 are cross-sectional views of a touch panel fabricated using the second preferred embodiment of the present invention.
11 to 13 are cross-sectional views illustrating a method of manufacturing a touch panel according to a first preferred embodiment of the present invention in the order of a process; And
14 to 16 are cross-sectional views illustrating a method of manufacturing a touch panel according to a second exemplary embodiment of the present invention in the order of process.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Further, in describing the present invention, detailed descriptions of related well-known techniques that may unnecessarily obscure the subject matter of the present invention will be omitted.

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

1 is a cross-sectional view of a touch panel according to a first embodiment of the present invention, Figure 2 is a perspective view of the touch panel shown in FIG.

As shown in FIGS. 1 and 2, the touch panel 100 according to the present exemplary embodiment may have an opening 135 in the transparent substrate 110, the color change layer 120 formed on the transparent substrate 110, and the color change layer 120. It includes a transparent electrode pattern 130 formed by patterning to have a), the color change layer 120 is transparent, the color change layer 123 exposed from the opening 135 reacts with the basic material of the transparent electrode pattern 130 It is characterized in that the color change to correspond to the color.

The transparent substrate 110 serves to provide a region in which the color change layer 120 and the transparent electrode pattern 130 are to be formed. Here, the transparent substrate 110 should have a supporting force capable of supporting the color change layer 120, the transparent electrode pattern 130, and the like so that the user can recognize the image provided by the image display apparatus. In consideration of the above-described support and transparency, the material of the transparent substrate 110 is polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone ( PES), Cyclic Olefin Polymer (COC), Triacetylcellulose (TAC) Film, Polyvinyl Alcohol (PVA) Film, Polyimide (PI) Film, Polystyrene (PS), Biaxially Stretched Polystyrene (Kresin) Containing biaxially oriented PS (BOPS), glass or tempered glass, etc., but is not necessarily limited thereto. Meanwhile, in order to activate one surface of the transparent substrate 110, it is preferable to perform a high frequency treatment or a primer treatment. By activating one surface of the transparent substrate 110, the adhesive force between the transparent substrate 110 and the color change layer 120 may be improved.

The color change layer 120 serves to improve visibility of the touch panel 100 by preventing the user from visually recognizing the transparent electrode pattern 130, and is formed on one surface of the transparent substrate 110. Here, the color change layer 120 has a transparent color. However, if all parts of the color change layer 120 have a transparent color, the color difference between the opening 135 between the transparent electrode pattern 130 and the transparent electrode pattern 130 may not be eliminated. Therefore, only the color change layer 123 exposed from the opening 135 among the color change layers 120 is selectively changed to correspond to the color of the transparent electrode pattern 130. As a result, only the color change layer 123 exposed from the opening 135 of the color change layer 120 has a color, and the color is the same as the color of the transparent electrode pattern 130, so that the transparent electrode pattern 130 and the opening ( 135) can eliminate the color difference between. For example, when the transparent electrode pattern 130 is formed of PEDOT / PSS and becomes blue, the discoloration layer 120 is formed to be transparent but preferably includes thymolphtalein. Since the discoloration layer 120 includes thymolphthalein, when a basic material is added to the discoloration layer 123 exposed from the opening 135 of the transparent electrode pattern 130, the discoloration layer 120 is changed to blue color, thereby forming the transparent electrode pattern 130. ) And the color difference between the opening 135 can be eliminated. Here, the basic substance is preferably ammonia gas or ammonia water, which is a weak base, but is not necessarily limited thereto. On the other hand, the color change layer 120 further includes an adhesive component to further strengthen the adhesive strength between the transparent substrate 110 and the transparent electrode pattern 130, it is possible to ensure the structural stability of the touch panel 100.

The transparent electrode pattern 130 serves to recognize a touch coordinate by the controller by generating a signal when the input means is touched, and is formed on the color change layer 120. Here, the transparent electrode pattern 130 may be formed using a conductive polymer having excellent flexibility and a simple coating process as well as indium thin oxide (ITO) that is commonly used. The conductive polymer includes poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (hereinafter referred to as PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene, and the like. In addition, the transparent electrode pattern 130 is patterned to have an opening 135. In the drawing, the transparent electrode pattern 130 is patterned in a bar shape. However, the transparent electrode pattern 130 is limited to a bar shape. Of course, it can be patterned in any pattern known in the art, such as rhombus, circle, square.

On the other hand, since the transparent electrode pattern 130 has a unique color, a color difference occurs between the transparent electrode pattern 130 and the opening 135. In particular, when the transparent electrode pattern 130 is formed of PEDOT / PSS, the transparent electrode pattern 130 becomes blue, and a color difference between the transparent electrode pattern 130 and the opening 135 is extremely generated. It was difficult. However, as described above, the touch panel 100 according to the present embodiment employs the color change layer 120 to eliminate the color difference between the transparent electrode pattern 130 and the opening 135, thereby using PEDOT / PSS. Even if the transparent electrode pattern 130 is formed, the user cannot recognize the transparent electrode pattern 130.

In addition, an electrode wiring 140 (refer to FIG. 2) receiving electrical signals from the transparent electrode pattern 130 is printed on the edge of the transparent electrode pattern 130. Here, the material of the electrode wiring 140 is preferably a silver paste (Ag paste) or a material composed of organic silver having excellent electrical conductivity, but is not limited thereto, conductive polymer, carbon black (including CNT), ITO Low-resistance metals, such as metal oxides and metals, can be used.

Meanwhile, in the case of the touch panel 100 according to the present embodiment, a self-capacitive type touch panel or a mutual capacitive type touch is performed using the transparent electrode pattern 130 having a one-layer structure. Panels can be produced. In addition, as described below, various types of touch panels including the above configuration can be manufactured.

3 to 5 are cross-sectional views of the touch panel fabricated using the first preferred embodiment of the present invention.

As shown in FIG. 3, a mutual capacitive type touch panel 200 (see FIG. 3) is formed by forming a color change layer 120 and a transparent electrode pattern 130 on both surfaces of the transparent substrate 110. ) Can be produced. In addition, as shown in FIGS. 4 to 5, two transparent substrates 110 formed in the order of the color change layer 120 and the transparent electrode pattern 130 are provided on one surface thereof so that the transparent electrode patterns 130 face each other. By bonding the two transparent substrates 110 with the adhesive layer 150, the mutual capacitive type touch panel 300 (see FIG. 4) or the digital resistive type touch panel 400 (FIG. 5). Here, in the mutual capacitive type touch panel 300 (see FIG. 4), an adhesive layer 150 is attached to the front surface of the transparent substrate 110 so that two opposing transparent electrode patterns 130 are insulated from each other. . On the other hand, in the case of the digital resistive type touch panel 400 (see FIG. 5), the adhesive layer 150 is transparent so that two opposing transparent electrode patterns 130 may contact each other when the pressure of the input means is applied. Attached only to the edge of the substrate 110, the air gap 160 (air-gap) is provided, the transparent electrode pattern 130 is returned to its original position when the pressure of the input means is removed.

The touch panels 200, 300, and 400 fabricated using the preferred embodiment of the present invention also have a transparent discoloration layer 120 so that only the discoloration layer 123 corresponding to the opening 123 may be formed in the transparent electrode pattern 130. By discoloring to correspond to the color, the color difference between the transparent electrode pattern 130 and the opening 135 may be eliminated, and the visibility of the touch panels 200, 300, and 400 may be improved.

6 is a cross-sectional view of a touch panel according to a second exemplary embodiment of the present invention, and FIG. 7 is a perspective view of the touch panel shown in FIG. 6.

As shown in FIGS. 6 to 7, the touch panel 500 according to the present exemplary embodiment may include the transparent substrate 110, the color change layer 120 formed on the transparent substrate 110, and an opening 135 in the color change layer 120. The transparent electrode pattern 130 is formed to be patterned to have a), the color change layer 120 corresponds to the color of the transparent electrode pattern 130, the portion 125 corresponding to the transparent electrode pattern 130 is an acidic material It is characterized in that the transparent discoloration in response to.

The biggest difference between the touch panel 100 according to the first embodiment and the touch panel 500 according to the present embodiment is a color change position and a color change process of the color change layer 120. Specifically, in the touch panel 100 according to the first embodiment, the discoloration layer 123 exposed from the opening 135 of the transparent electrode pattern 130 is transparent and discolors to correspond to the transparent electrode pattern 130. do. On the other hand, in the touch panel 500 according to the present embodiment, the portion 125 corresponding to the transparent electrode pattern 130 is transparently discolored from the color of the transparent electrode pattern 130. Therefore, the above description will be focused on the differences, and redundant descriptions will be omitted.

The transparent substrate 110 serves to provide a region in which the color change layer 120 and the transparent electrode pattern 130 are to be formed, and on one surface of the transparent substrate 110, the color change layer 120 and the transparent electrode pattern ( 130) in order.

The color change layer 120 serves to improve visibility of the touch panel 500 by preventing the user from visually recognizing the transparent electrode pattern 130, and is formed on one surface of the transparent substrate 110. Here, the color change layer 120 has a color corresponding to the color of the transparent electrode pattern 130 to be described later. However, if all parts of the color change layer 120 have a color corresponding to the color of the transparent electrode pattern 130, the color difference between the opening 135 between the transparent electrode pattern 130 and the transparent electrode pattern 130 is eliminated. Can't. Therefore, only the portion 125 of the color change layer 120 corresponding to the transparent electrode pattern 130 is selectively changed color. As a result, the color change layer 120 has a color of only the color change layer 123 exposed from the opening 135, and the color is the same as the color of the transparent electrode pattern 130, so that the transparent electrode pattern 130 and the opening ( 135) can eliminate the color difference between. For example, when the transparent electrode pattern 130 is formed of PEDOT / PSS and becomes blue, the color change layer 120 is formed in blue but preferably includes congo red. Since the color change layer 120 includes congo red, when the acidic material is received from the transparent electrode pattern 130 formed of PEDOT / PSS, the portion 125 corresponding to the transparent electrode pattern 130 is transparently discolored. As a result, the color difference between the transparent electrode pattern 130 and the opening 135 may be eliminated. However, the acidic material that discolors the discoloration layer 120 does not necessarily need to be transmitted from the transparent electrode pattern 130. Of course, a separate acidic gas such as chlorine gas or an acidic solution may be used. On the other hand, the color change layer 120 further comprises an adhesive component to further strengthen the adhesive force between the transparent substrate 110 and the transparent electrode pattern 130, it is possible to ensure the structural stability of the touch panel 500.

The transparent electrode pattern 130 serves to recognize a touch coordinate by the controller by generating a signal when the input means is touched, and is formed on the color change layer 120. Here, the transparent electrode pattern 130 may be formed using a conductive polymer having excellent flexibility and a simple coating process as well as indium thin oxide (ITO) that is commonly used. The conductive polymer includes poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (hereinafter referred to as PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene, and the like.

In this case, the transparent electrode pattern 130 is patterned to have an opening 135. Since the transparent electrode pattern 130 has a unique color, a color difference occurs between the transparent electrode pattern 130 and the opening 135. In particular, when the transparent electrode pattern 130 is formed of PEDOT / PSS, the transparent electrode pattern 130 becomes blue, and a color difference between the transparent electrode pattern 130 and the opening 135 is extremely generated. It was difficult. However, as described above, the touch panel 500 according to the present embodiment employs the color change layer 120 to eliminate the color difference between the transparent electrode pattern 130 and the opening 135, thereby using PEDOT / PSS. Even if the transparent electrode pattern 130 is formed, the user cannot recognize the transparent electrode pattern 130.

In addition, an electrode wiring 140 (refer to FIG. 7) receiving electrical signals from the transparent electrode pattern 130 is printed on the edge of the transparent electrode pattern 130. Here, as the material of the electrode wiring 140, a material formed of a metal oxide or metals such as silver paste (Ag paste) and organic silver, as well as a conductive polymer, carbon black (including CNT), and ITO may be used.

Meanwhile, in the case of the touch panel 500 according to the present embodiment, a self-capacitive type touch panel or a mutual capacitive type touch is performed using the transparent electrode pattern 130 having a one-layer structure. Panels can be produced. In addition, as described below, various types of touch panels including the above configuration can be manufactured.

8 to 10 are cross-sectional views of a touch panel fabricated using the second preferred embodiment of the present invention.

As shown in FIG. 8, a mutual capacitive type touch panel 600 is formed by forming a color change layer 120 and a transparent electrode pattern 130 on both surfaces of the transparent substrate 110. ) Can be produced. 9 to 10, two transparent substrates 110 are formed on one surface of the discoloration layer 120 and the transparent electrode pattern 130 so that the transparent electrode patterns 130 face each other. By bonding the two transparent substrates 110 with the adhesive layer 150, a mutual capacitive type touch panel 700 (see FIG. 9) or a digital resistive type touch panel 800 (FIG. 10) can be produced. Here, in the mutual capacitive type touch panel 700 (see FIG. 9), an adhesive layer 150 is attached to the front surface of the transparent substrate 110 so that two opposing transparent electrode patterns 130 are insulated from each other. . On the other hand, in the case of the digital resistive type touch panel 800 (see FIG. 10), the adhesive layer 150 is transparent so that two opposing transparent electrode patterns 130 may contact when the pressure of the input means is applied. Attached only to the edge of the substrate 110, the air gap 160 (air-gap) is provided, the transparent electrode pattern 130 is returned to its original position when the pressure of the input means is removed.

The touch panels 600, 700, and 800 fabricated by using the preferred embodiment of the present invention also have a color change layer 120 corresponding to the color of the transparent electrode pattern 130 to correspond to the transparent electrode pattern 130. By transparently discoloring 125, the color difference between the transparent electrode pattern 130 and the opening 135 may be eliminated, and the visibility of the touch panels 600, 700, and 800 may be improved.

11 to 13 are cross-sectional views illustrating a method of manufacturing a touch panel according to a first embodiment of the present invention in the order of process.

11 to 13, in the method of manufacturing the touch panel 100 according to the present embodiment, (A) forming a discoloration layer 120 on the transparent substrate 110, (B) discoloring layer ( Forming a transparent electrode pattern 130 patterned to have the opening 135 in the 120 and (C) reacting the discoloration layer 123 exposed from the opening 135 of the transparent discoloration layer 120 with a basic material. It is a configuration including the step of discoloring to correspond to the color of the transparent electrode pattern 130.

First, as shown in FIG. 11, the color change layer 120 is formed on the transparent substrate 110. Here, the discoloration layer 120 is formed on one surface of the transparent substrate 110 to have a transparent color, and a high frequency on one surface of the transparent substrate 110 to improve the adhesion between the transparent substrate 110 and the discoloration layer 120. It is preferred to activate via treatment or primer treatment. In addition, the color change layer 120 may further include an adhesive component in order to enhance the adhesive force between the transparent electrode pattern 130 and the transparent substrate 110 to be formed in a later step.

Next, as shown in FIG. 12, the transparent electrode pattern 130 patterned to have the opening 135 in the color change layer 120 is formed. Here, the transparent electrode pattern 130 using a conductive polymer containing not only ITO but also poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene Can be formed. In addition, the transparent electrode pattern 130 is a dry process such as sputtering, evaporation, or dip coating, spin coating, roll coating, spray coating, or the like. After forming on the entire surface of the color change layer 120 using a wet process, such as may be patterned through a laser process or a wet etching process. Alternatively, the transparent electrode pattern 130 may be directly applied to the color change layer 120 by using a direct patterning process such as screen printing, gravure printing, inkjet printing, and the like. It can be formed by patterning. At this time, since the transparent electrode pattern 130 has a unique color, a color difference occurs between the transparent electrode pattern 130 and the opening 135. In particular, when the transparent electrode pattern 130 is formed of PEDOT / PSS, the transparent electrode pattern 130 is blue, and the color difference between the transparent electrode pattern 130 and the opening 135 is extreme. However, the color difference between the transparent electrode pattern 130 and the opening 135 may be eliminated by selectively discoloring the color change layer 120 in the next step.

Next, as shown in FIG. 13, the discoloration layer 123 exposed from the opening 135 of the transparent discoloration layer 120 is reacted with a basic material to discolor to correspond to the color of the transparent electrode pattern 130. . Since all parts of the discoloration layer 120 before color change are transparent, the color difference between the opening 135 between the transparent electrode pattern 130 and the transparent electrode pattern 130 may not be eliminated. Therefore, only the color change layer 123 exposed from the opening 135 of the color change layer 120 is selectively discolored to correspond to the color of the transparent electrode pattern 130. As a result, since only the color change layer 123 exposed from the opening 135 has the same color as the color of the transparent electrode pattern 130, and the remaining part 125 is transparent, a gap between the transparent electrode pattern 130 and the opening 135 is formed. The color difference can be eliminated. For example, when the transparent electrode pattern 130 is formed of PEDOT / PSS in the above-described step, since the transparent electrode pattern 130 has a blue color, the discoloration layer 120 may also be discolored in thymolphthal. It is preferable to include a lane. When the color change layer 120 includes thymolphthalein, when the basic material is added to the color change layer 123 exposed from the opening 135, the color change color is changed to blue. Therefore, the color difference between the transparent electrode pattern 130 and the opening 135 can be eliminated. On the other hand, it is preferable to use a weak base ammonia gas or ammonia water as the basic substance, but is not necessarily limited thereto.

14 to 16 are cross-sectional views illustrating a method of manufacturing a touch panel according to a second exemplary embodiment of the present invention in the order of process.

As shown in Figure 14 to 16, the manufacturing method of the touch panel 500 according to the present embodiment (A) forming a color change layer 120 on the transparent substrate 110, (B) the color change layer ( Forming a transparent electrode pattern 130 patterned to have an opening 135 in the 120 and (C) corresponding to the transparent electrode pattern 130 of the color change layer 120 corresponding to the color of the transparent electrode pattern 130 It is a configuration comprising the step of reacting the portion 125 with the acidic material to transparent discoloration.

The biggest difference between the manufacturing method of the touch panel 100 according to the first embodiment and the manufacturing method of the touch panel 500 according to the present embodiment is the discoloration position and the discoloration process of the color fading layer 120. Specifically, in the manufacturing method of the touch panel 100 according to the first embodiment described above, the discoloration layer 123 exposed from the opening 135 of the transparent electrode pattern 130 is transparent and is then applied to the transparent electrode pattern 130. It is discolored to correspond. On the other hand, in the method of manufacturing the touch panel 500 according to the present exemplary embodiment, the portion 125 corresponding to the transparent electrode pattern 130 corresponds to the color of the transparent electrode pattern 130 and is transparently discolored. Therefore, the above description will be focused on the differences, and redundant descriptions will be omitted.

First, as shown in FIG. 14, the color change layer 120 is formed on the transparent substrate 110. Here, the color change layer 120 has a color corresponding to the color of the transparent electrode pattern 130 to be formed in a later step. In addition, the color change layer 120 may further include an adhesive component in order to enhance the adhesive force between the transparent electrode pattern 130 and the transparent substrate 110 to be formed in a later step.

Next, as shown in FIG. 15, the transparent electrode pattern 130 patterned to have the opening 135 in the color change layer 120 is formed. Here, the transparent electrode pattern 130 using a conductive polymer containing not only ITO but also poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene Can be formed.

Next, as shown in FIG. 16, the portion 125 corresponding to the transparent electrode pattern 130 of the color change layer 120 corresponding to the color of the transparent electrode pattern 130 is reacted with an acidic material to discolor the color transparently. Step. Since the discoloration layer 120 before all discoloration has a color corresponding to the transparent electrode pattern 130, the color difference between the opening 135 between the transparent electrode pattern 130 and the transparent electrode pattern 130 may not be eliminated. Therefore, only the portion 125 of the color change layer 120 corresponding to the transparent electrode pattern 130 is selectively transparently discolored. As a result, since only the color change layer 123 exposed from the opening 135 has the same color as the color of the transparent electrode pattern 130, and the remaining part 125 is transparent, a gap between the transparent electrode pattern 130 and the opening 135 is formed. The color difference can be eliminated. For example, when the transparent electrode pattern 130 is formed of PEDOT / PSS in the above-described step, since the transparent electrode pattern 130 becomes blue, the color change layer 120 is also formed in blue, but Congo red (congo red) It is preferable to include). Since the color change layer 120 includes congo red, when an acidic substance is received from the transparent electrode pattern 130 formed of PEDOT / PSS, the portion 125 corresponding to the transparent electrode pattern 130 becomes transparent. Discoloration. Therefore, the color difference between the transparent electrode pattern 130 and the opening 135 can be eliminated. However, the acidic material that discolors the discoloration layer 120 does not necessarily need to be transmitted from the transparent electrode pattern 130. Of course, a separate acidic gas such as chlorine gas or an acidic solution may be used.

Although the present invention has been described in detail through specific embodiments, this is for explaining the present invention in detail, and the touch panel and its manufacturing method according to the present invention are not limited thereto, and the technical features of the present invention It will be apparent that modifications and improvements are possible by those skilled in the art. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100, 200, 300, 400, 500, 600, 700, 800: touch panel
110: transparent substrate 120: color change layer
123: discoloration layer exposed from the opening
125: color change layer corresponding to the transparent electrode pattern
130: transparent electrode pattern 135: opening
140: electrode wiring 150: adhesive layer
160: air gap

Claims (18)

Transparent substrate;
A color change layer formed on the transparent substrate; And
A transparent electrode pattern formed by patterning the openings in the color change layer;
Including,
The discoloration layer is transparent, but the discoloration layer exposed from the opening reacts with a basic material to discolor to correspond to the color of the transparent electrode pattern.
The method according to claim 1,
The transparent electrode pattern is a touch panel, characterized in that formed of a conductive polymer containing poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene.
The method according to claim 1,
The discoloration layer is a touch panel, characterized in that it comprises thymolphthalein.
The method according to claim 1,
The discoloration layer is a touch panel, characterized in that it comprises an adhesive component.
The method according to claim 1,
The basic material is a touch panel, characterized in that ammonia gas or ammonia water.
Transparent substrate;
A color change layer formed on the transparent substrate; And
A transparent electrode pattern formed by patterning the openings in the color change layer;
Including,
The discoloration layer corresponds to a color of the transparent electrode pattern, and the portion corresponding to the transparent electrode pattern is transparent to the color change in response to the acidic material.
The method of claim 6,
The transparent electrode pattern is a touch panel, characterized in that formed of a conductive polymer containing poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene.
The method of claim 6,
The discoloration layer is a touch panel, characterized in that it comprises an adhesive component.
The method of claim 6,
The acidic material is a touch panel, characterized in that received from the transparent electrode pattern formed of poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS) or chlorine gas.
(A) forming a discoloration layer on the transparent substrate;
(B) forming a transparent electrode pattern patterned to have openings in the color change layer; And
(C) reacting the discoloration layer exposed from the opening of the transparent discoloration layer with a basic material to discolor to correspond to the color of the transparent electrode pattern;
Method of manufacturing a touch panel comprising a.
The method according to claim 10,
In the step (B)
The transparent electrode pattern is a touch panel, characterized in that formed of a conductive polymer containing poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene Way.
The method according to claim 10,
In the step (A),
The discoloration layer is a manufacturing method of a touch panel, characterized in that it comprises thymolphthalein.
The method according to claim 10,
The discoloration layer is a manufacturing method of the touch panel, characterized in that it comprises an adhesive component.
The method according to claim 10,
In the step (C),
The basic material is a method for manufacturing a touch panel, characterized in that ammonia gas or ammonia water.
(A) forming a discoloration layer on the transparent substrate;
(B) forming a transparent electrode pattern patterned to have openings in the color change layer; And
(C) transparently discoloring by reacting a portion of the discoloration layer corresponding to the color of the transparent electrode pattern corresponding to the transparent electrode pattern with an acidic material;
Method of manufacturing a touch panel comprising a.
The method according to claim 15,
In the step (B)
The transparent electrode pattern is a touch panel, characterized in that formed of a conductive polymer containing poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS), polyaniline, polyacetylene or polyphenylenevinylene Way.
The method according to claim 15,
The discoloration layer is a manufacturing method of the touch panel, characterized in that it comprises an adhesive component.
The method according to claim 15,
In the step (C),
The acidic material is a method of manufacturing a touch panel, characterized in that received from the transparent electrode pattern formed of poly-3,4-ethylenedioxythiophene / polystyrenesulfonate (PEDOT / PSS) or chlorine gas.
KR1020100118018A 2010-11-25 2010-11-25 Touch panel and method for manufacturing the same KR20120056464A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103336638A (en) * 2013-06-17 2013-10-02 业成光电（深圳）有限公司 Touch-control electronic device with color changeable pattern
KR20140096832A (en) * 2013-01-29 2014-08-06 삼성전기주식회사 Touch Panel
CN104516611A (en) * 2014-12-23 2015-04-15 深圳市华星光电技术有限公司 Capacitive embedded touch screen and display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140096832A (en) * 2013-01-29 2014-08-06 삼성전기주식회사 Touch Panel
CN103336638A (en) * 2013-06-17 2013-10-02 业成光电（深圳）有限公司 Touch-control electronic device with color changeable pattern
CN103336638B (en) * 2013-06-17 2016-08-10 业成光电（深圳）有限公司 There is the screen touch electronic device of pattern colour change function
CN104516611A (en) * 2014-12-23 2015-04-15 深圳市华星光电技术有限公司 Capacitive embedded touch screen and display device
WO2016101354A1 (en) * 2014-12-23 2016-06-30 深圳市华星光电技术有限公司 Capacitive in cell touch screen and display device

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