WO2013105724A1 - Capteur pour écran tactile - Google Patents

Capteur pour écran tactile Download PDF

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Publication number
WO2013105724A1
WO2013105724A1 PCT/KR2012/009480 KR2012009480W WO2013105724A1 WO 2013105724 A1 WO2013105724 A1 WO 2013105724A1 KR 2012009480 W KR2012009480 W KR 2012009480W WO 2013105724 A1 WO2013105724 A1 WO 2013105724A1
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WO
WIPO (PCT)
Prior art keywords
electrode pattern
window decoration
transparent electrode
conductive
transparent
Prior art date
Application number
PCT/KR2012/009480
Other languages
English (en)
Korean (ko)
Inventor
박철
Original Assignee
(주)삼원에스티
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Filing date
Publication date
Application filed by (주)삼원에스티 filed Critical (주)삼원에스티
Publication of WO2013105724A1 publication Critical patent/WO2013105724A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208—Touch screens
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Definitions

  • the present invention relates to a touch panel sensor, and more particularly, to a touch panel sensor for detecting a contact position of an object.
  • FIG. 1 is a perspective view illustrating a conventional capacitive touch panel sensor.
  • the conventional touch panel sensor 1 is bonded to the lower insulating sheet 10 and the upper insulating sheet 20 at predetermined intervals.
  • the lower ITO electrode 30 and the upper ITO electrode 40 are arranged perpendicular to each other.
  • a metal wire 48 extends from the end of the upper ITO electrode 40 to the lower portion of the upper insulating sheet 20.
  • the lower ITO electrode 20 is also electrically connected to the circuit board 50 by a separate metal wire 38.
  • the metal wires 38 and 48 are shiny with metallic luster and may not be visually seen from the upper part of the transparent upper insulating sheet 20 because light does not pass through. Accordingly, in order to prevent the metal wires 38 and 48 and the circuit board 50 from being visible, a non-transmissive window decoration 65 is formed on the bottom of the reinforcing substrate 60 using transparent glass or reinforced plastic, and the reinforcing substrate is formed. 60 is disposed on the upper insulating sheet 20.
  • the thickness of the touch panel sensor 1 is increased by the reinforcing substrate 60, which may reduce the transparency and clarity of the touch panel sensor 1, and reduce the sensitivity of the touch panel sensor.
  • the thickness of the touch panel sensor 1 itself may be increased.
  • the defect occurrence rate may increase during the adhesion process, and may reduce the light transmittance or clarity as a whole.
  • the colored conductive layer and the window decoration are separately formed, it is difficult to form the colors of both elements in the same manner, and if the color control is a little failed, the position of the colored conductive layer may be apparent.
  • a transparent upper ITO electrode 40 disposed in the edge region of the touch panel sensor where the window decoration is formed may be blurred from the outside in contrast to the window decoration provided in a relatively dark color.
  • the present invention provides a touch panel sensor capable of preventing the boundary from being visible from the outside as compared with a window decoration in which a transparent electrode pattern disposed at an edge region of the touch panel sensor is provided in a relatively dark color.
  • the present invention provides a touch panel sensor that can facilitate the electrical connection structure between the transparent electrode pattern and the external device provided to sense the contact of the object.
  • the present invention provides a touch panel sensor for forming a transparent electrode pattern and a window decoration on the same surface.
  • the present invention provides a touch panel sensor that can be expected to reduce the number of laminated layers of the touch panel sensor, such as the improvement of optical characteristics, reduced defect rate, weight reduction, cost reduction.
  • the present invention provides a touch panel sensor having an electrode pattern structure and a window decoration structure having excellent electrical characteristics.
  • the touch panel sensor for detecting the contact position of the object to be delivered to the external device, the transparent insulating substrate; A transparent electrode pattern formed on the bottom surface of the insulating substrate; A window decoration formed to partially cover an end portion of the transparent electrode pattern on the bottom surface of the insulating substrate; A wire member formed on the window decoration to electrically connect the transparent electrode pattern to the external device; And a transparent correction layer provided between the window decoration and the insulating substrate to prevent the boundary of the transparent electrode pattern from being visible from the outside.
  • the transparent electrode pattern used to detect the contact position of the object may be formed in a capacitive method or a resistive film method.
  • a transparent electrode pattern which may be formed of ITO, which is a transparent material, is formed to a thickness of about 0.1 ⁇ m on an insulating substrate, while window decoration is formed to a thickness of about 2 to 3 ⁇ m. Therefore, when the ITO electrode pattern is formed on the same surface of the insulating substrate on which the window decoration is formed, the transparent electrode pattern is often broken at the boundary of the window decoration, causing a power failure.
  • the transparent electrode pattern is first formed on the bottom surface of the insulating substrate, and the window decoration is formed on the bottom surface of the same insulating substrate, thereby preventing the transparent electrode pattern from being broken.
  • the window decoration is provided along the edge of the insulating substrate in the form of a frame, and a wire member for placing the electrical change generated from the transparent electrode pattern to the external device is placed on the bottom of the window decoration. Since the wire member is not visible from the outside only by being covered by the window decoration, the non-conductive coloring material can be included in the window decoration.
  • window decoration is typically provided using colored materials having a relatively dark color to prevent the underlying wire members or other opaque configurations from being visible to the outside.
  • the transparent electrode pattern placed in the window decoration area is provided with transparent ITO, there is a difference between window decoration and contrast, and there is a difference between the refraction, scattering or absorption of light at both sides of the transparent electrode pattern and the window decoration. Different from each other, the boundary of the transparent electrode pattern may be faintly visible from the outside.
  • the present invention provides a transparent correction layer between the window decoration and the insulating substrate.
  • the transparent compensation layer which is transparent but is made of an insulating material, is disposed through the boundary between the window decoration and the transparent electrode pattern to alleviate the difference in contrast, light refraction, scattering and absorption occurring around the boundary between the window decoration and the transparent electrode pattern. In this case, it is possible to prevent the boundary of the transparent electrode pattern from being visible.
  • the transparent correction layer may be provided along only the bottom surface of the insulating substrate. In some cases, the transparent correction layer may be provided along the bottom surface of the insulating substrate, and may be provided along the bottom surface of the transparent electrode pattern at the portion where the transparent electrode pattern is disposed. In this case, the through hole may be formed in the transparent correction layer corresponding to an end portion of the transparent electrode pattern which may be electrically connected to the wire member. For reference, it is preferable to provide a through hole even when the transparent correction layer is provided with an insulating material or provided with high resistance.
  • the transparent electrode pattern and the wire member may be connected to mutually exclusively send and receive signals.
  • a window decoration having a relatively high resistance but having conductivity compared to the transparent electrode pattern
  • the decoration does not electrically connect all the transparent electrode patterns but has a relatively high resistance
  • the terminals of the wire members and the ends of the transparent electrode patterns corresponding to or matching up and down may be exclusively connected.
  • the term relative is used based on the resistance value generated by the window decoration. This will be described later in more detail.
  • another method for allowing the wire member and the transparent electrode pattern to exchange signals exclusively with each other first, provides a through area for partially exposing an end portion of the transparent electrode pattern to the window decoration, A colored conductive layer may be provided that is electrically connected to an end portion of the transparent electrode pattern exposed to the through area while blocking light.
  • the colored conductive layer may be formed using a conductive material having a relatively lower resistivity than window decoration.
  • the window decoration is made of a component similar to the colored conductive layer and has conductivity, but the window decoration has a higher resistance than the colored conductive layer, thereby affecting exclusive communication between the wire member and the transparent electrode pattern through the colored conductive layer. You can prevent it from falling.
  • the colored conductive layer is significantly different from the colored conductive layer disclosed in Patent No. 10-1013037. Specifically, since the colored conductive layer in the patent contains more conductive material than the non-conductive ink for matching the color, it is difficult to match the color, but in the present invention, the specific gravity of the conductive material of the colored conductive layer is lowered, and the non-conductive It is easier to match colors by increasing the specific gravity of the ink, and since the colored conductive layer has a large resistance difference from the window decoration, the electrical connection between the wire member and the transparent electrode pattern is relatively possible.
  • Exclusive in this specification means that the corresponding terminals or electrodes exchange signals between each other, and even if there is some noise, it will be said to include transmitting and receiving (communicate) the signal so that the overall signal transmission.
  • the window decoration may be provided non-conductively, and the wire member and the transparent electrode pattern may be connected through the colored conductive layer. Also in this case, it can be understood that the colored conductive layer and the wire member having relatively low resistance are mutually exclusively connected to each other by high-resistance window decoration.
  • the window decoration is conductive, it is electrically separated from the wire member.
  • a decoration layer is preferably formed between the window decoration and the wire member.
  • the decor insulating layer may be formed of an insulating material made of non-conductive ink according to the color implemented in the window decoration, or may be provided by laminating a separate insulating or reflective film or applying an insulating paint.
  • the wire member may be a metal wire pattern (in other words, a metal line pattern) formed on the window decoration, and they may be manufactured by silk screen, gravure printing, or the like using a conventional silver paste. May be formed by various methods such as metal deposition and etching, nano imprinting, and inkjet printing.
  • the wire member may not be directly formed on the window decoration, and may be used to indirectly connect necessary electrical terminals by using a flexible circuit board.
  • the wire member and the transparent electrode pattern disposed on both sides of the window decoration including a suitable conductive material are interposed.
  • the wire member and the transparent wire signal which mutually exchange electrical signals are transparent. Only window decoration exists between the electrode patterns, or in some cases, a colored conductive layer could be used.
  • the window decoration is basically insulated in the plane direction by an insulating coloring material, but by providing conductive particles so that the window is only conductive in the vertical direction,
  • the transparent electrode patterns and the wire members disposed vertically with the decoration therebetween may be electrically connected to each other.
  • the window decoration including the conductive particles may be understood as an anisotropic conductive adhesive (ACA) which may have conductivity only in the thickness direction thereof.
  • ACA anisotropic conductive adhesive
  • the anisotropic conductive adhesive generally used in the prior art includes a thermosetting resin and fine conductive particles, and has conductivity at a portion subjected to heat and pressure.
  • the window decoration can be conductive in the vertical direction without applying heat and pressure.
  • the transparent electrode pattern and the wire member disposed vertically with the window decoration interposed therebetween can be directly connected up and down by the individual conductive particles. .
  • the present invention does not exclude the use of a general anisotropic conductive adhesive that becomes conductive by applying heat and pressure.
  • a window decoration including a large number of conductive particles having a diameter smaller than the thickness of the window decoration can be used.
  • the transparent electrode pattern and the wire member disposed up and down through the energization region may be electrically connected to each other.
  • the conductive particles may be provided in a ball shape, but may also be provided in a shape such as a rugby ball or some crushed shape rather than an ideal ball.
  • the diameter of the conductive particles mentioned above will generally be a corresponding term when the conductive particles are spherical, but when the conductive particles are provided in a three-dimensional shape such as a pillar, an horn, or a cube, the diameter of the conductive particles is a conductive particle. It can be understood as the average value of the lengths measured in.
  • the process of partially pressing or heating the window decoration to be conductive may be preceded by the provision of the wire member or may be done later.
  • the wire member on the window decoration, and indirectly heating or pressing the window decoration on the wire member, a partial area of the window decoration corresponding to the area of the wire member and the transparent electrode pattern for electrically connecting with each other is removed.
  • the conductivity can be changed.
  • the wire member may be provided on the window decoration. In this case, it is possible to prevent the deformation of the wire member that may occur during the heating and pressing process of the window decoration that is pressed together with the heat of about 150 °C to become conductive.
  • an electrical characteristic (for example, capacitance value) changed by an object to be contacted in a touch region (inside region of window decoration) in which a transparent window on which a transparent electrode pattern is disposed is formed is transferred to an external device through a wire member.
  • the external device for example, the controller, may sense a touch position in the touch area based on the electrical characteristic.
  • the control unit may be used as a concept including a central processing unit or a control unit capable of detecting or calculating the contact position of the object based on the changed electrical characteristics by the contact of the object.
  • a plurality of transparent electrode patterns are provided side by side in an elongated shape on the bottom surface of the insulating substrate, a plurality of dummy transparent electrodes may be formed between each transparent electrode pattern.
  • the dummy transparent electrode may be formed on the same surface or the opposite surface of the insulating substrate, spaced apart from the transparent electrode pattern to be electrically separated, and formed using a conductive transparent material.
  • the dummy transparent electrode may be formed of the same material or a different material from that of the transparent electrode pattern, and may be formed in a region where the transparent electrode pattern is not formed in the insulating substrate.
  • the space between the transparent electrode patterns may be optically compensated by the dummy transparent electrode, and light may be prevented from being distorted due to the transparent electrode pattern.
  • the sensitivity of the signal can be kept almost the same without variation in contrast to the pattern without the dummy transparent electrode.
  • the sensitivity of the signal can be greatly improved.
  • a dummy transparent electrode is formed between the transparent electrode patterns. In this case, the improved signal sensitivity can be measured with almost the same sensitivity without deviation.
  • Measuring the signal sensitivity without deviation means that the program can quickly and accurately determine the contact with the body, which may mean that the program speed and touch sensitivity are improved.
  • the above-described dummy transparent electrode may be provided in a region where the window decoration is disposed, thereby preventing the boundary of the transparent electrode pattern mentioned above from being visible.
  • the transparent correction layer may be provided with a high resistance material, in this case, the wire member has a resistance that is formed with the upper and lower ends of the transparent electrode pattern end is significantly less than the resistance formed with the other end of the transparent electrode pattern
  • the signal may be exclusively sent and received with the end portions of the transparent electrode patterns corresponding to each other up and down.
  • the wire member and the transparent electrode pattern corresponding to each other can be electrically connected directly to the top and bottom of the transparent correction layer without having to form a hole in a portion corresponding to the top and bottom of the transparent electrode pattern.
  • High resistance between the wire member and the transparent electrode pattern which is not immediately located means that the signal is difficult to exchange.
  • the transparent correction layer is formed of a material with high resistance and does not make holes separately for simplifying the manufacturing process, but it is obvious that holes can be formed in some cases.
  • the transparent electrode pattern placed in the window decoration area is provided with transparent ITO, there is a difference in window decoration and contrast, and the light refraction, scattering or absorption rate is different from each other at the boundary between the transparent electrode pattern and the window decoration. As a result, the boundary of the transparent electrode pattern may be blurred from the outside.
  • the transparent correction layer provided between the window decoration and the insulating substrate is disposed through the boundary between the window decoration and the transparent electrode pattern, the transparent correction layer is generated around the boundary between the window decoration and the transparent electrode pattern. Contrast, light refraction, scattering, and absorbance difference can be alleviated to some extent, thereby preventing the boundary of the transparent electrode pattern from being visible.
  • the dummy transparent electrode in the touch area provided to maintain the sensitivity of the signal without variation is also provided in the area where the window decoration is disposed, so that the boundary of the transparent electrode pattern is more effectively visible. You can prevent it.
  • the touch panel sensor of the present invention can improve the conductive structure of the touch panel sensor through the use of the window decoration area, and it is possible to form a transparent electrode pattern directly on the bottom surface of the tempered glass substrate or the transparent resin substrate.
  • the window decoration and the electrode pattern may be formed on the same surface, and electrical connection between the electrode pattern and the window decoration may be realized.
  • the touch panel sensor of the present invention can be expected to reduce the number of laminated layers of the touch panel sensor, such as optical characteristics, reduced defect rate, weight reduction, cost reduction.
  • the touch panel sensor of the present invention can provide an electrode pattern structure and a window decoration structure having excellent electrical characteristics.
  • FIG. 1 is an exploded perspective view illustrating a conventional capacitive touch panel sensor.
  • FIG. 2 is an exploded perspective view of a touch panel sensor according to an exemplary embodiment of the present invention.
  • FIG. 3 is a partially exploded perspective view illustrating a connection relationship between a transparent electrode pattern and a wire member in the touch panel sensor of FIG. 2.
  • FIG. 4 is a cross-sectional view illustrating the formation of the connection relationship of FIG. 3.
  • FIG. 5 is a partially exploded perspective view illustrating a connection relationship between a transparent electrode pattern and a wire member in a touch panel sensor according to another exemplary embodiment of the present invention.
  • FIG. 6 is an exploded cross-sectional view illustrating the formation of the connection relationship of FIG. 5.
  • FIG. 7 is a bottom view illustrating a touch panel sensor according to another exemplary embodiment of the present invention.
  • FIG. 8 is a partially enlarged perspective view illustrating the transparent connection pattern of FIG. 7.
  • FIG. 9 is a cross-sectional view taken along the direction A-A of FIG. 7.
  • FIG. 10 is an exploded perspective view for explaining a top sheet structure of a touch panel sensor according to another embodiment of the present invention.
  • FIG. 11 is a bottom perspective view illustrating a connection relationship between the transparent electrode pattern and the wire member of FIG. 10.
  • FIG. 12 is a cross-sectional view illustrating a connection relationship between the transparent electrode pattern and the wire member of FIG. 10.
  • FIG. 13 is an exploded perspective view illustrating a touch panel sensor according to another embodiment of the present invention.
  • FIG. 14 is a front view for explaining the top sheet of FIG.
  • FIG. 15 is a cross-sectional view of the top sheet according to another embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of a touch panel sensor according to an embodiment of the present invention
  • Figure 3 is an exploded perspective view for explaining the upper sheet structure of Figure 2
  • Figure 4 is a connection between the transparent electrode pattern and the wire member of Figure 3 It is sectional drawing for demonstrating formation of a relationship.
  • the touch panel sensor 100 includes an upper sheet 110, a lower sheet 130, and an optical adhesive layer 150.
  • the upper sheet 110 includes an upper insulating substrate 111 and an upper electrode pattern 112, and the lower sheet 130 includes a lower insulating substrate 131 and a lower transparent electrode pattern 132.
  • the upper insulating substrate 111 is a material having a high surface strength and may be manufactured using a glass material or other plastic material that transmits light such as glass material and has excellent surface strength, and likewise, the upper electrode in the lower sheet 130
  • the lower insulating substrate 131 on which the lower transparent electrode pattern 132 interacting with the pattern 112 is disposed may also be made of the same material as the upper insulating substrate 111.
  • the insulating substrate When the plastic film is used as the insulating substrate, the insulating substrate may be provided as a plate-like film or a roll-type film, the electrode pattern may be formed on the insulating substrate by a method such as gravure printing or film laminating, the upper insulating substrate (111) ) May be manufactured using plastic such as polyethylene, polypropylene, acryl, and polyethylene terephthalate (PET) through which light is transmitted, such as glass or a glass material.
  • plastic such as polyethylene, polypropylene, acryl, and polyethylene terephthalate (PET) through which light is transmitted, such as glass or a glass material.
  • the upper electrode pattern 112 is indium tin oxide (ITO) or indium zinc oxide (IZO), al-doped tin oxide (ATO), al-doped zinc oxide (AZO), and carbon nanotube (CNT) having both transparency and conductivity. ) And the like. Since the upper electrode pattern 112 is formed of a transparent conductive material from the outside, it is not visible from the outside, and the organic light emitting diode and liquid crystal display device disposed under the touch panel sensor. ) And an image of a display such as a plasma display panel can be exposed.
  • ITO indium tin oxide
  • IZO indium zinc oxide
  • ATO al-doped tin oxide
  • AZO al-doped zinc oxide
  • CNT carbon nanotube
  • An upper electrode pattern 112 and a lower transparent electrode pattern 132 are formed on the bottom surface of the upper insulating substrate 111 and the upper surface of the lower insulating substrate 131 so as to interact with each other and sense the approach of the object. .
  • An optical adhesive layer 150 may be provided between the upper sheet 110 and the lower sheet 130 to bond the two sheets to each other.
  • the optical adhesive layer 150 may be provided in the form of an OCA film, and may be provided in a state covered with a protective film. As will be described later, if the position of the object can be detected only by the electrode pattern of the bottom of the top sheet 110, it is possible to provide only the protective film or the protective layer on the bottom of the top sheet without the optical adhesive layer or the bottom sheet.
  • the optical adhesive layer 150 may be made of a non-conductive material, and the upper electrode pattern 112 and the lower transparent electrode pattern 132 may be physically bonded and electrically separated by the optical adhesive layer 150.
  • the optical adhesive layer 150 is bonded to the upper sheet 110 and the lower sheet 130 by using an optical adhesive film or an optically clear adhesive (OCA) film, and the light is transmitted well, and is excellent optically.
  • OCA optically clear adhesive
  • a central region C in which the upper electrode pattern 112 and the transparent window are formed is provided, and a window decoration region D is formed around the central region.
  • the upper electrode pattern 112 formed of ITO which is a transparent material, is formed to a thickness of about 0.1 ⁇ m on the upper insulating substrate 111, while the window decoration 120 is formed to a thickness of about 2 to 3 ⁇ m. .
  • the upper electrode pattern 112 formed of ITO is formed on the same surface of the upper insulating substrate 111 on which the window decoration 120 is formed, the upper electrode pattern 112 is broken at the boundary of the window decoration 120 to cut off the power. This may occur.
  • the upper electrode pattern 112 is first formed on the bottom of the upper insulating substrate 111, and the window decoration 120 is formed on the bottom of the same upper insulating substrate 111, thereby forming the upper electrode pattern 112. This can be prevented from breaking.
  • the window decoration 120 is provided along the edge of the upper insulating substrate 111 in the form of a frame, and the lower surface of the window decoration 120 is configured to externally change the electrical change generated from the upper electrode pattern 112.
  • the wire pattern 170 to be transferred to is placed. Since the wire pattern 170 is not visible from the outside only by being covered by the window decoration 120, the non-conductive coloring material may be included in the window decoration 120.
  • the window decoration 120 may provide, for example, a mixture of carbon powder and non-conductive black ink at about 20:80 in order to express black, and has a thickness of about 2 to 3 ⁇ m by various methods such as silk screen and gravure printing. It can be formed as.
  • the above window decoration may be provided by mixing a conductive material such as carbon powder and a non-conductive ink such as black ink, and may adjust the overall resistance by using a composition between the conductive material and the non-conductive ink.
  • a decor insulating layer formed of 100% nonconductive black ink may be formed over the window decoration.
  • the decor insulating layer may include a through hole formed corresponding to the end position of the electrode pattern, and the through hole may be formed at a position adjusted so that the end of the electrode pattern and the wire member end coincide with each other.
  • the through hole may be provided in the form of a hole or a groove at this position.
  • such a decoration insulating layer is omitted, and even in this case, the wire member and the upper electrode pattern 112 disposed with the window decoration interposed therebetween end portions of the upper electrode pattern corresponding to the upper and lower sides through the conductive window decoration. You can send and receive signals exclusively with
  • the window decoration 120 may mix carbon or the like to implement black, but in some cases, non-conductive inks of different colors may be mixed to implement other colors other than black.
  • Various conductive materials such as ATO, ITO, PEDOT, metal powder, carbon fiber, nanosilver and the like may be used.
  • the window decoration 120 may be provided in various ways in addition to mixing the conductive material and the non-conductive ink. For example, it may be formed using a high resistance thin film formed of a material having a high resistance coefficient, and the material having a high resistance coefficient may be formed of an oxide such as black chromium oxide in a thin film form, and may be formed of a conductive polymer or conductive material such as polyaniline or phthalocyanine. Some organic substances may be formed in a thin film form.
  • the window decoration 120 is relatively colored in order to prevent the opaque configuration, such as the wire pattern 170 underneath, from being visible to the outside.
  • the boundary of the upper electrode pattern 112 may be faintly visible from the outside.
  • a transparent correction layer 180 is provided between the window decoration 120 and the upper insulating substrate 111.
  • the transparent correction layer 180 which is transparent but is made of an insulating material, is disposed through the boundary between the window decoration 120 and the upper electrode pattern 112, and is around the boundary between the window decoration 120 and the upper electrode pattern 112.
  • the contrast, light refraction, scattering, and absorbance difference generated may be alleviated slightly, and the boundary of the upper electrode pattern 112 may be prevented from appearing.
  • the transparent correction layer 180 may be provided along only the bottom surface of the upper insulating substrate 111. However, in the present embodiment, the transparent correction layer 180 is provided along the bottom surface of the upper insulating substrate 111, and the upper electrode pattern 112 is disposed. Is provided along the bottom of the upper electrode pattern 112. In this case, the through hole 182 is formed in the transparent correction layer 180 corresponding to the end of the upper electrode pattern 112, which may be electrically connected to the end of the wire pattern 170.
  • the transparent correction layer is provided with a through hole separately because it is insulating.
  • the transparent correction layer is made of a material having a high resistance, even if no special hole is drilled, the wire member has a resistance formed at the end of the transparent electrode pattern corresponding to the top and bottom and formed at the end of the transparent electrode pattern. By using less, it is possible to exclusively send and receive signals with the end of the corresponding transparent electrode pattern up and down.
  • the transparent correction layer is formed of a high resistance material and does not make holes separately for the purpose of simplifying the manufacturing process, and in some cases, it is obvious that holes can be formed.
  • the upper electrode pattern 112 may be connected to the flexible circuit board 160 through a wire pattern 170 formed on the bottom surface of the window decoration 120.
  • the window decoration 120 corresponds to a peripheral area and functions to visually block the wire pattern 170 formed of silver paste or the like.
  • the window decoration 120 has a relatively high resistance, and based on FIG. 4, the wire pattern 170 disposed at the center of the window decoration ( 120 is interposed therebetween and can be exclusively communicated between the electrode pattern 112b and the wire pattern 170 spaced apart by about 2 to 3 ⁇ m, but other electrode patterns (200 ⁇ m or more separated from the periphery) Normal communication with 112a, 112c is not possible.
  • the ratio of the carbon powder or ink mentioned in the present embodiment may mean weight%.
  • the specific resistance of the conductive paint may be about 1 billion times higher than that of aluminum. If the high-resistance conductive ink is used in an area of about 1 mm x 1 mm and a thickness of about 4 ⁇ m, the resistance in the vertical direction is about 40 ⁇ , which is lower than that of the actual ITO transparent electrode.
  • the resistance in the lateral direction is about 2.5M ⁇ , which is 60,000 times than the vertical resistance of about 40 ⁇ The above resistance value comes out.
  • the wire patterns 170 and the electrode patterns vertically adjacent to each other are formed. While the resistance between the 112b is measured about 10 to 1000 ⁇ , the resistance between the laterally adjacent wire pattern 170 and the peripheral electrode patterns 112a and 112c may be measured between about 10M ⁇ to 100M ⁇ or more than 100M ⁇ . .
  • the wire pattern 170 and the upper electrode pattern 112 may be electrically connected to each other through the conductive window decoration 120.
  • the wire pattern 170 and the upper electrode pattern 112 may be electrically connected to an end portion of the wire pattern 170.
  • a through hole 182 is provided corresponding to an end of the upper electrode pattern 112 to allow the wire pattern 170 and the upper electrode pattern 112 to transmit and receive signals through the window decoration 120.
  • the upper electrode pattern is formed in a single line shape, but in some cases, a plurality of straight lines, curved lines, and wave-shaped lines are formed in parallel to each other to form a group, and among the ends of the grouped parallel lines.
  • One may be provided in electrical connection.
  • FIG. 5 is a partially exploded perspective view illustrating a connection relationship between an electrode pattern and a wire member in a touch panel sensor according to another exemplary embodiment of the present disclosure
  • FIG. 6 is an exploded cross-sectional view illustrating the formation of the connection relationship of FIG. 5.
  • the upper sheet 210 of the touch panel sensor includes an upper insulating substrate 211, an upper electrode pattern 212, and a transparent correction layer 280.
  • a deco insulating layer 225 formed of 100% non-conductive black ink is further formed on the window decoration 220, so that an electrical signal transmitted to the wire pattern 270 to the window decoration 220 which is provided as conductive is formed. Deco insulating layer 225 can prevent the transfer.
  • the decor insulating layer 225 may include a through hole 227 formed corresponding to the end position of the upper electrode pattern 212, and the through hole 227 may be an end of the upper electrode pattern 212. And the end portion of the wire pattern 270 may be formed at a position adjusted to coincide with each other up and down.
  • the through hole 227 may be provided in the form of a hole or a groove at the position.
  • a separate through hole 227 is provided in the decor insulation layer 225 disposed between the window decoration 220 and the wire pattern 270 so that the wire pattern 270 and the upper portion corresponding to each other up and down are provided.
  • the upper electrode pattern 212 and the wire pattern 270 disposed substantially up and down may only sandwich the window decoration 220. In this state, the upper electrode pattern 212 and the wire pattern 270 corresponding to each other up and down in this state are able to exchange signals exclusively with each other as in the previous embodiment.
  • the through hole 282 is formed in the transparent correction layer 280 formed on the bottom of the window decoration 220 and the upper electrode pattern 212 so as not to interfere with the signal connection between the upper electrode pattern 212 and the wire pattern 270.
  • the through hole 282 is provided corresponding to an end of the upper electrode pattern 212 that may be electrically connected to an end of the wire pattern 270. That is, in the present exemplary embodiment, the through hole 227 of the decor insulating layer 225 and the through hole 282 of the transparent correction layer 280 may be disposed up and down correspondingly.
  • FIG. 7 is a bottom view illustrating a touch panel sensor according to another embodiment of the present invention
  • FIG. 8 is a partially enlarged perspective view illustrating the transparent connection pattern of FIG. 7
  • FIG. 9 is a direction AA of FIG. 7. It is an incision section.
  • the optical adhesive layer is not shown in FIGS. 7 to 9, and as described above, the transparent coating layer may be formed using an optical adhesive layer, a UV transparent hardener, or the like.
  • the touch panel sensor according to the present embodiment includes an insulating substrate 310, a first transparent electrode pattern 320 and a second transparent electrode pattern 330 formed on the insulating substrate 310.
  • the insulating pattern 340 is interposed between the first transparent electrode pattern 320 and the second transparent electrode pattern 330.
  • the insulating substrate 310 may be formed of a synthetic resin film such as transparent PET, PC, PE, or tempered glass substrate.
  • the first transparent electrode pattern 320 and the second transparent electrode pattern 330 are formed on the bottom surface of the insulating substrate 310.
  • the first transparent electrode pattern 320 may be formed using a transparent conductive material, and is provided by a series of line patterns arranged side by side in a horizontal or vertical direction on the insulating substrate 310.
  • the line pattern for the first transparent electrode pattern 320 includes an extension part 322 and a bridge part 324 provided in a line along one direction.
  • the expansion part 322 and the bridge part 324 are formed alternately and arranged in a line, it may be formed by the same or different transparent conductive material.
  • the extension 322 is formed relatively or significantly wider than the bridge 324, and the bridge 324 is formed between the extensions 322 to electrically connect the series of extensions 322. There is a number.
  • the shape of the extension part 322 and the bridge part 324 may be formed as a continuous rectangle as a motif, as shown, the shape may be a variety of shapes, such as rhombus, circle or oval.
  • the extension part 322 and the bridge part 324 may be formed on the same material and the same surface together with the transparent connection part 336 for the second transparent electrode pattern 330, and are spaced apart from each other with a minimum width. It can be chosen to be in harmony.
  • the second transparent electrode pattern 330 is formed to form a stacked structure with the first transparent electrode pattern 320.
  • the second transparent electrode pattern 330 may be formed above or below the first transparent electrode pattern 320, and is formed to be electrically separated from the first transparent electrode pattern 320.
  • an insulating pattern 340 may be formed between the first transparent electrode pattern 320 and the second transparent electrode pattern 330.
  • the insulating pattern 340 may be generally formed using a material such as SiO 2 , Si 3 N 4, or TiO 2 forming an insulating thin film.
  • the second transparent electrode pattern 330 includes a transparent connector 336. As illustrated in FIG. 8, the transparent connector 336 may be formed at the same time as the first transparent electrode pattern 320.
  • the transparent connection part 336 may also be formed of a transparent conductive material having a width of about 0.1 mm to 0.2 mm, and the expansion part 322 and the bridge part after etching the ITO layer formed on the insulating substrate 310 through a photolithography process. 324 can be formed together.
  • the second transparent electrode pattern 330 may further include a low resistance line 334 in addition to the transparent connection portion 336.
  • the low resistance line 334 may be formed on the insulating pattern 340, and is formed to electrically connect the entire series of transparent connectors 336 while passing through the surfaces of the plurality of transparent connectors 336.
  • the low resistance line 334 may be formed using a metal material such as gold, silver, aluminum, or chromium, and may be simultaneously formed with the wire pattern 370 to be described later.
  • These metal patterns may be formed by forming a metal thin film layer in a single layer or a multilayer on the insulating substrate 310 on which the electrode patterns 320 and 330 are formed, and by etching according to a predetermined low resistance line 334 and a wire pattern 370.
  • the low resistance line is provided as an upper surface of the second transparent electrode pattern, but in some cases, may be provided on at least one side of the upper surface or the bottom surface of the electrode pattern.
  • the low resistance line 334 is not transparent and may optically block the display, but may be formed to have a width of about 30 ⁇ m or less, preferably 3 ⁇ m or less, and the fine pattern of the width may not be visible to the naked eye. .
  • the metal various materials such as aluminum, copper, gold, silver, nickel, and chromium may be used.
  • the resistivity ( ⁇ ) is considerably low, about 2.82 * 10 -6 ⁇ cm. If it is assumed that such an aluminum low resistance line 334 is formed with a width of about 1 ⁇ m, a height of 0.1 ⁇ m, and a length of about 10 cm, then the resistance can be calculated as follows.
  • the resistance of the ITO electrode pattern can be calculated. Since the sheet resistance of ITO is basically 2 to 300 ⁇ / square and is currently technically 150 ⁇ / square, the resistance of the ITO electrode pattern can be calculated as follows.
  • the line of aluminum has a significantly lower resistance than the ITO pattern of the same length.
  • the specific resistance of chromium (Cr) is about 1.27 * 10 -5 ⁇ cm, it can be seen that it is significantly lower than the ITO electrode pattern at about 12.7k ⁇ under the same conditions as aluminum.
  • both ends of the first transparent electrode pattern 320 may be formed to partially overlap the window decoration 350, the wire pattern 370 through the through hole 357 of the decor insulating layer 355 in the overlapped portion ) Is electrically connected.
  • the low resistance line 334 formed on the second transparent electrode pattern 330 may be directly connected to the wire pattern 370 without distinction, and the connection between the low resistance line 334 and the wire pattern 370 may be smoothly performed.
  • the transparent connection pattern 380 may be formed using conductive or nonconductive transparent ink.
  • the wire pattern 370 constituting the wire member is formed on the decor insulation layer 355, but in some cases it is not directly formed on the decor insulation layer 355, but indirectly through a flexible circuit board. It can be formed as.
  • An end portion of the wire pattern 370 may be provided with a connection portion 374 having a relatively large area, and through the connection portion 374, the wire pattern 370 may be connected to another flexible circuit board or other electrical circuit for connection with an external device. It can be connected to the connection terminal.
  • Two electrode patterns may be formed on the bottom surface of one tempered glass substrate using the first and second transparent electrode patterns 320 and 330, and there is no need to overlap separate electrode sheets.
  • all of the electrode patterns may be formed on one surface, and a blocking layer coated with a grounded sheet or a conductive material may be further formed on the bottom surface.
  • an insulating layer 355 having a through hole 357 formed on the window decoration 350 is provided, and the electrode pattern 320 and the wire pattern 370 are vertically aligned at the position of the through hole 357. You can do it.
  • the electrode pattern 320 and the wire pattern 370 are not directly in contact with each other, only the terminals that are vertically connected to each other through the conductive window decoration 350 may be connected exclusively.
  • the through hole 357 may be provided in the form of a closed hole or a groove open at one side in the position.
  • the transparent correction layer 390 formed on the bottom of the window decoration 350 and the first transparent electrode pattern 320 penetrates so as not to interfere with the signal connection between the first transparent electrode pattern 320 and the wire pattern 370.
  • the hole 392 is provided, and the through hole 392 is provided corresponding to an end of the first transparent electrode pattern 320 which may be electrically connected to an end of the wire pattern 370. That is, in the present exemplary embodiment, the through hole 357 of the decor insulation layer 355 and the through hole 392 of the transparent correction layer 390 may be disposed up and down correspondingly.
  • FIG. 10 is an exploded perspective view illustrating a top sheet structure of a touch panel sensor according to another exemplary embodiment of the present invention
  • FIG. 11 is a bottom perspective view illustrating a connection relationship between an electrode pattern and a wire member of FIG. 10.
  • 12 is a cross-sectional view for describing the formation of a connection relationship between the electrode pattern and the wire member of FIG. 10.
  • the touch panel sensor of the present embodiment may include an upper sheet 410, a lower sheet, and an optical adhesive layer.
  • the upper sheet 410 is different from the previous embodiment. It will be described with reference to, the description of the other components can refer to the previous embodiment.
  • the upper sheet 410 includes an upper insulating substrate 411 and an upper electrode pattern 412.
  • an upper electrode pattern 412 is formed on the upper insulating substrate 411, and a window decoration 420 may be provided on the upper insulating pattern 412.
  • the window decoration 420 may be provided by various methods described above.
  • the window decoration 420 may be provided as a first conductive paint in which carbon powder and non-conductive black ink are mixed at about 8:92 to express black. It may be formed to a thickness of 2 ⁇ 3 ⁇ m.
  • the window decoration and the colored conductive layer may be mixed with carbon to realize black, but in some cases, non-conductive inks of different colors may be mixed for implementing other colors than black, and carbon may be used as the conductive material.
  • ATO Various conductive materials such as ITO, PEDOT, metal powder, carbon fiber, nanosilver and the like may be used.
  • the difference between the window decoration 420 and the contrast occurs in the upper electrode pattern 412 in the area of the window decoration 420 represented in black. Both sides of the upper electrode pattern 412 and the window decoration 420 have a boundary. In FIG. 2, the boundary of the upper electrode pattern 412 may be dimly visible from the outside due to differences in refraction, scattering, or absorption of light.
  • a transparent correction layer 480 is provided between the window decoration 420 and the upper insulating substrate 411.
  • the transparent correction layer 480 which is transparent but is made of an insulating material, is disposed through the boundary between the window decoration 420 and the upper electrode pattern 412, and is disposed around the boundary between the window decoration 420 and the upper electrode pattern 412.
  • the contrast, light refraction, scattering, and absorbance difference may be alleviated slightly, thereby preventing the boundary of the upper electrode pattern 412 from being visible.
  • the transparent correction layer 480 is provided along the bottom surface of the upper insulating substrate 411, and is provided along the bottom surface of the upper electrode pattern 412 at the portion where the upper electrode pattern 412 is disposed. Accordingly, the through hole 482 is disposed in the transparent correction layer 480 corresponding to the end of the upper electrode pattern 412 which may be electrically connected to the end of the wire pattern 470.
  • a through region 422 may be formed in the window decoration 420 corresponding to an end of the upper electrode pattern 412.
  • the through region 422 may be formed through an etching process after forming the window decoration 420, but may be formed at a time in a printing process such as gravure printing, silk screen, inkjet, or pad printing.
  • An end portion of the upper electrode pattern 412 and an end portion of the wire member may be formed to be adjusted up and down through the through region 422, and the colored conductive layer 440 may be formed to correspond to the position of the through region 422. Can be formed.
  • the colored conductive layer 440 may use a second conductive paint in which carbon powder such as window decoration and non-conductive black ink are mixed at about 20:80.
  • both the first and second conductive paints have a higher ratio of the nonconductive black ink than the carbon powder, they can be recognized as the same color in appearance. However, since the resistance coefficient of the second conductive paint is relatively small, only the terminals disposed above and below the wire pattern 470 and the upper electrode pattern 412 can normally communicate with each other.
  • the first conductive paint for the window decoration 420 and the second conductive paint for the colored conductive layer 440 are provided by mixing the conductive material and the non-conductive ink, but the composition ratio of the conductive material mixed with the first conductive paint When the ratio is smaller than the composition ratio of the conductive material mixed in the second conductive paint, exclusive signal transmission may be performed between the wire pattern 470 and the upper electrode pattern 412 corresponding to each other up and down.
  • the upper electrode pattern 412 may be connected to the flexible circuit board through the wire pattern 470 formed on the bottom surface of the window decoration 420.
  • the window decoration 420 corresponds to a peripheral area and functions to visually block the wire pattern 470 on which silver paste or the like is formed.
  • the conductive material composition ratio of the second conductive paint is preferably larger than the conductive material composition ratio of the first conductive paint, and is preferably maintained at about 25% or less while keeping the ratio of the conductive material smaller than that of the non-conductive ink.
  • the composition ratio of the conductive material in the first conductive paint is preferably mixed at about 10% or less while being smaller than the composition ratio of the conductive material of the second conductive paint.
  • the specific resistance of the conductive paint may be about 1 billion times higher than that of aluminum. If the high-resistance conductive ink is used in an area of about 1 mm x 1 mm and a thickness of about 4 ⁇ m, the resistance in the vertical direction is about 40 ⁇ , which is lower than that of the actual ITO transparent electrode.
  • the resistance in the lateral direction is about 2.5M ⁇ , which is 60,000 times than the vertical resistance of about 40 ⁇ The above resistance value comes out.
  • the resistance between the wire pattern and the electrode pattern is about 10 to 1000 ⁇
  • the resistance between the laterally adjacent electrodes can be measured between 10 M ⁇ and 100 M ⁇ or more than 100 M ⁇ .
  • the composition of the conductive material is about 10% or less in the window decoration around the colored conductive layer, the lateral resistance due to the window decoration is almost 100,000 to 1 million times compared to the vertical resistance of the colored conductive layer. The difference can be more than this.
  • the window decoration 420 is conductive, including a conductive material
  • the composition of the carbon powder is significantly smaller than that of the non-conductive black ink, which substantially affects the communication between the wire pattern 470 and the electrode pattern 412. can not do it.
  • the window decoration 420 is formed to a thickness of about 2 to 3 ⁇ m, and the colored conductive layer 440 is also formed to a thickness of several micrometers, exclusive communication through the colored conductive layer 440 is possible. At this time, it can be said that other electrode patterns are separated by 200 ⁇ m or more through the window decoration 420.
  • a separate decor insulation layer may be provided between the wire member 470 and the window decoration 420, and a through hole may be formed in the decor insulation layer.
  • FIG. 13 is an exploded perspective view illustrating a touch panel sensor according to another embodiment of the present invention
  • FIG. 14 is a front view illustrating the top sheet of FIG. 13.
  • the touch panel sensor 500 includes a lower sheet 530 including a lower insulating substrate 531 on which a lower electrode pattern 532 is formed, an upper electrode pattern 512, and a dummy transparent electrode (
  • the upper sheet 510 including the upper insulating substrate 511 is formed.
  • a plurality of lower electrode patterns 532 are formed at uniform intervals in the horizontal direction
  • the plurality of upper electrode patterns 512 are uniform or non-uniform in parallel to the vertical direction. It can be formed at intervals.
  • the dummy transparent electrode 514 may be formed of the same ITO material as the upper electrode pattern 512 and may be provided separated from the upper electrode pattern 512.
  • an optical adhesive layer 550 such as an optically clear adhesive (OCA) film may be provided between the lower sheet 530 and the upper sheet 510.
  • OCA optically clear adhesive
  • the lower electrode pattern 532 is formed on the upper surface of the lower sheet 530, and may be closely arranged, for example, about 5 mm wide. As the lower electrode pattern 532 is densely arranged, an electromagnetic shielding effect can be expected, and the occurrence of noise to the upper electrode pattern 512 of the upper sheet 510 can be reduced.
  • An upper electrode pattern 512 may be formed on the bottom of the upper sheet 510.
  • the upper electrode pattern 512 may also be formed of a transparent conductive material such as ITO, IZO, or CNT (carbon nanotube).
  • the dummy transparent electrode 514 is also provided in a region where the window decoration 520 is disposed. Specifically, the dummy transparent electrode 514 is provided to an end portion of the upper electrode pattern 512 that is covered by the window decoration 520. Thus, the effect of preventing the boundary of the upper electrode pattern 512 from being visible can be obtained.
  • a detailed drawing and a description of a method of connecting the upper electrode pattern 512 and the wire member having the window decoration 520 therebetween may be omitted since the present embodiment may be referred to.
  • a transparent correction layer may be provided between the window decoration 520 and the upper insulating substrate 511.
  • the transparent correction layer which is transparent but is made of an insulating material, is disposed through the boundary between the window decoration 520 and the upper electrode pattern 512, and the contrast is generated around the boundary between the window decoration 520 and the upper electrode pattern 512.
  • the light refraction, scattering, and absorbance difference may be alleviated to some extent, thereby preventing the boundary of the upper electrode pattern 512 from being visible.
  • the transparent correction layer is basically formed along the bottom surface of the upper insulating substrate 511, and is provided along the bottom surface of the upper electrode pattern and the dummy transparent electrode at a portion where the upper electrode pattern 512 or the dummy transparent electrode 514 is disposed. .
  • a through hole may be formed in the transparent correction layer corresponding to an end of the upper electrode pattern 512 that may be electrically connected to an end of the wire pattern 518.
  • the upper electrode pattern 512 and the lower electrode pattern 532 are connected to the lower part of the touch panel sensor 500 by wire patterns 518 and 538 provided as wire members using silver paste, metal deposition, and the like, respectively.
  • Each of the patterns 518 and 538 is electrically connected to a flexible printed circuit board (FPCB) 560 interposed between the two substrates.
  • the touch panel sensor 500 may be connected to an external main controller through the flexible circuit board 560, and may transmit a touch signal due to interaction between the transparent electrodes to the outside.
  • the dummy transparent electrode 514 may be provided according to a regular or irregular arrangement between the upper electrode patterns 512, and the dummy transparent electrodes 514 may be spaced apart from each other to electrically interact with other adjacent dummy transparent electrodes 514. Can be functionally separated so as not to.
  • the upper electrode pattern 512 and the surroundings thereof may be provided with the same and similar refractive index by the dummy transparent electrode 514, and may be prevented from being distorted.
  • the dummy transparent electrode 514 may be formed of a conductive material to block noise introduced from the outside of the upper sheet 510, and may provide a stable field between the upper electrode pattern 512 and the lower electrode pattern 532.
  • the signal sensitivity can be kept almost the same without variation.
  • the dummy transparent electrode 514 is formed to have the same or smaller size than the width of the upper electrode pattern 512, and the width and height of the dummy transparent electrode 514 are the width of the upper electrode pattern 512. It is formed in the same size as.
  • the dummy transparent electrode 514 may have a width less than or equal to the width of the upper electrode pattern 512, and may be formed long and vertically. As illustrated, the dummy transparent electrode 514 is formed in a pattern separated vertically and horizontally. In this case, stable signal sensitivity can be measured.
  • the dummy transparent electrode 514 is formed larger or wider than the upper electrode pattern 512, the other upper electrode pattern 512 may be affected by the body touching the dummy transparent electrode 514. Therefore, the size of the upper electrode pattern 512 is preferably provided as small and tight as possible.
  • the upper electrode pattern 512 and the dummy transparent electrode 514 are formed on the same material and the same surface, for example, the bottom surface of the substrate, but both electrodes may be formed of different conductive transparent materials, It may be formed on the opposite side.
  • FIG. 15 is a cross-sectional view of the top sheet according to another embodiment of the present invention.
  • the bottom sheet of the present embodiment may be omitted by referring to the description of the above-described embodiment, and the following will focus on the top sheet of the present embodiment.
  • the upper sheet 610 covers a portion of an end portion of the upper electrode pattern 612 and the upper electrode pattern 612 formed on the bottom surface of the upper insulating substrate 611, the upper insulating substrate 611. It may include window decoration 620.
  • the upper electrode pattern 612 may be connected to the flexible circuit board through the wire pattern 670 formed on the bottom surface of the window decoration 620.
  • the end of the wire pattern 670 provided as the wire member of the present embodiment is disposed up and down with the window decoration 620 and the transparent correction layer 680 between the corresponding to the end of the upper electrode pattern 612.
  • an insulating window decoration 620 and a transparent correction layer 680 are disposed between the end of the wire pattern 670 and the end of the upper electrode pattern 612, but may be electrically connected to each other.
  • the through hole 682 is formed in the transparent correction layer 680 corresponding to an end portion of the wire pattern 670 and an end portion of the upper electrode pattern 612 arranged up and down.
  • the window decoration 620 includes a conductive ball 622 provided in a mixed state with the coloring material in addition to the coloring material.
  • the window decoration 620 is conductive in the plane direction, the upper electrode pattern 612 of each of the window decoration 620 is difficult to generate electricity. Therefore, the window decoration 620 is formed of an insulating colored material.
  • the surface direction is basically insulating, but by providing a conductive ball 622 to be conductive only in the vertical direction. That is, the window decoration 620 including the conductive balls 622 may be understood as an anisotropic conductive adhesive that may have conductivity only in the thickness direction thereof.
  • the upper electrode pattern 612 and the wire pattern 670 disposed up and down with the window decoration 620 interposed therebetween may be electrically connected to each other by the conductive balls 622.
  • the anisotropic conductive adhesive generally used in the prior art contains a thermosetting resin and a fine conductive ball, and has a conductivity at a portion subjected to heat and pressure.
  • the window decoration 620 has conductivity in the vertical direction even without applying heat and pressure.
  • the conductive area 620 includes a conductive ball 622 having a diameter (approximately 3 to 5 ⁇ m) larger than the thickness of the window decoration 620 formed to a thickness of about 2 to 3 ⁇ m in the window decoration 620.
  • the upper electrode pattern 612 and the wire pattern 670 disposed up and down with the window decoration 620 interposed therebetween may be directly connected up and down by the respective conductive balls 622.
  • the window decoration may be pressurized or heated.
  • the window decoration 620 is not necessarily conductive through a separate pressurization or heating process, unlike the conventional general anisotropic conductive adhesive. It is possible to prevent the touch panel sensor component from being damaged by pressurization or heating.
  • the window decoration 620 of the present embodiment may not include only the coloring material or the conductive balls 622 mentioned above, and an epoxy resin, a phenoxy resin, a solvent in which methyl ethyl ketone and toluene are mixed, and amidazole. It may further include a curing agent.
  • the present invention does not exclude the use of a general anisotropic conductive adhesive that becomes conductive by applying heat and pressure.
  • a window decoration including a large number of conductive particles having a diameter smaller than the thickness of the window decoration can be used.
  • the electrode patterns and the wire members disposed up and down through the energization region may be electrically connected to each other.
  • the touch panel sensor according to the present invention may be widely applied to a display for the purpose of detecting a contact position of an object.

Abstract

La présente invention se rapporte à un capteur destiné à un écran tactile, qui détecte la position de contact d'un objet afin de transmettre les informations de position détectées à un dispositif externe. Le capteur pour écran tactile faisant l'objet de cette invention comprend : un substrat isolant transparent ; un motif d'électrode transparent se trouvant sur la surface inférieure dudit substrat isolant ; une décoration de fenêtre installée de manière à recouvrir en partie une extrémité dudit motif d'électrode transparent sur la surface inférieure du substrat isolant ; un élément filaire disposé sur la partie supérieure de la décoration de fenêtre pour connecter électriquement le motif d'électrode transparent au dispositif externe ; et une couche de correction transparente qui est constituée d'un matériau isolant transparent et qui est placée entre la décoration de fenêtre et le substrat isolant afin d'éviter que le bord du motif d'électrode transparent soit visible de l'extérieur.
PCT/KR2012/009480 2012-01-13 2012-11-09 Capteur pour écran tactile WO2013105724A1 (fr)

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KR101101336B1 (ko) * 2011-02-25 2012-01-02 (주)삼원에스티 터치패널센서
KR101092405B1 (ko) * 2011-04-13 2011-12-09 (주)삼원에스티 터치패널센서

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