WO2015093643A1 - Capteur d'écran tactile - Google Patents

Capteur d'écran tactile Download PDF

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Publication number
WO2015093643A1
WO2015093643A1 PCT/KR2013/011791 KR2013011791W WO2015093643A1 WO 2015093643 A1 WO2015093643 A1 WO 2015093643A1 KR 2013011791 W KR2013011791 W KR 2013011791W WO 2015093643 A1 WO2015093643 A1 WO 2015093643A1
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WO
WIPO (PCT)
Prior art keywords
electrode pattern
transparent electrode
metal
insulating substrate
touch panel
Prior art date
Application number
PCT/KR2013/011791
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English (en)
Korean (ko)
Inventor
박철
신용철
Original Assignee
(주)삼원에스티
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Publication date
Application filed by (주)삼원에스티 filed Critical (주)삼원에스티
Priority to PCT/KR2013/011791 priority Critical patent/WO2015093643A1/fr
Publication of WO2015093643A1 publication Critical patent/WO2015093643A1/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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • 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
    • 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
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present invention relates to a touch panel sensor for sensing a contact position of an object.
  • FIG. 1 is a perspective view illustrating a conventional mutual touch panel sensor.
  • the lower insulating sheet 10 and the upper insulating sheet 20 are bonded at predetermined intervals, or in some cases, a transparent optical adhesive film is interposed between the sheets.
  • the lower ITO electrode 30 and the upper ITO electrode 40 are vertically arranged on the opposite surfaces of the lower insulating sheet 10 and the upper insulating sheet 20, and specifically, the lower ITO electrode 30 is The upper surface of the lower insulating sheet 10 is oriented from left to right, and the upper ITO electrode 40 is oriented from the upper side to the lower side on the bottom surface of the upper insulating sheet 20.
  • the touch panel sensor 1 has a predetermined capacitance, that is, a capacitance value, corresponding to the area of each intersection at each intersection of the lower ITO electrode 10 and the upper ITO electrode 20 arranged to cross each other.
  • a capacitance value corresponding to the area of each intersection at each intersection of the lower ITO electrode 10 and the upper ITO electrode 20 arranged to cross each other.
  • the capacitance of the body part may be changed by adding the area of the body part to the area of the upper ITO electrode 20 disposed above.
  • the lower ITO electrode 30 may be used as a transmitter line that is intermittently provided with a current.
  • the upper ITO electrode 20 is provided with current to the lower ITO electrode 30, a part of the body approaches. It can be used as a receiver electrode for measuring the difference between the output signal, that is, the current value generated by the change in the capacitance value of the lower ITO electrode 30 and the upper ITO electrode 40 changed depending on the presence or absence.
  • the role of the lower and upper ITO electrodes is not determined, and in some cases, may play the opposite role.
  • a method of detecting a contact position of a part of a body by detecting a change in an output signal that is changed is a mutual method.
  • a mutual capacitance touch sensing method it is referred to as a mutual capacitance touch sensing method.
  • the upper ITO electrode 40 may be adjusted so that the input signal or the output signal that is intermittently transmitted has a resistance value that can be sufficiently transmitted to an external controller.
  • the controller inputs an input signal to either the lower ITO electrode 30 or the upper ITO electrode 40, and detects a contact position of a part of the body using the output signal output to the other side.
  • the width of the upper ITO electrode 40 is formed to be narrower than the lower ITO electrode 30 so that a change in capacitance value occurs at an intersection point, a rapid increase in resistance may occur as the length thereof becomes longer. As a result, it is difficult to lengthen the upper ITO electrode 40, thereby limiting the total area of the touch panel sensor 1.
  • the thickness of the ITO can be increased in order to lower the resistance of the ITO, but in this case, there is a problem in that the transmittance is lowered. Big problems can arise.
  • the width of the upper ITO electrode 40 is increased to reduce the resistance value, the width of the upper ITO electrode 40 is limited in consideration of the occurrence of the change in the capacitance value generated by interacting with the lower ITO electrode 30. There is a restriction that cannot be made wider than the width of the electrode 30. Furthermore, when the width is widened, a problem that is visible from the outside may occur.
  • the ITO and IZO used for manufacturing the transparent electrode of the touch panel sensor 1 are higher in resistance than the metal, the ITO and IZO are generated by the input signal provided to the touch panel sensor 1 and the changed capacitance value.
  • the sensitivity of the touch panel sensor 1 may be greatly reduced by the loss of the output signal.
  • the present invention provides a touch panel sensor that can overcome the limitation that the area of the touch panel sensor is limited by the increase in the resistance value according to the increase in the length of the electrode disposed in the touch panel sensor.
  • the present invention provides a touch panel sensor that can improve touch error, touch feeling, and touch efficiency limited by structural limitations of a conventional touch panel sensor having electrodes crossing each other up and down.
  • a touch panel sensor placed on a display and detecting a contact position of an object is disposed to be electrically separated from a transparent electrode pattern provided in a line and a transparent electrode pattern, and the transparent electrode It may include a metal electrode pattern of the mesh (mesh) provided to cross the pattern.
  • a transparent electrode pattern using a conductive ceramic, such as ITO is used as the lower electrode that is disposed to cross each other and induces a change in capacitance. Since the limit of is less than that of the conventional upper electrode using ITO, it is relatively free from the limitation of the total area of the touch panel sensor.
  • the metal electrode pattern may be provided with a width that is relatively free to increase the length even if it is thin, so that it is not visible from the outside (a width of about 100 ⁇ m or less). It is provided in a (mesh) shape, so it is hard to check with the naked eye from the outside.
  • the metal electrode pattern not having a mesh shape is at least 50 ⁇ m or less in width, and it is hard to see the naked eye.
  • the metal electrode pattern on the mesh is slightly wider than the metal electrode pattern without a mesh shape. Even if it grows, it is not visually confirmed. This is because fine metal wires of about 0.5 to 1 ⁇ m entangled with each other serve to scatter light.
  • the transparent electrode pattern and the metal electrode pattern described above may be disposed within a range intersecting each other, and the touch panel sensor includes a lower insulating substrate on the display and an upper insulating substrate disposed on the lower insulating substrate.
  • the transparent electrode pattern and the metal electrode pattern may be disposed on one surface of the lower insulating substrate and the upper insulating substrate, respectively, wherein the 'one surface' may include both an upper surface and a lower surface.
  • the transparent electrode pattern is disposed on the upper surface of the lower insulating substrate
  • the metal electrode pattern is preferably disposed on the bottom surface of the upper insulating substrate.
  • the transparent electrode pattern and the metal electrode pattern may be disposed on the bottom and top surfaces, respectively.
  • the transparent electrode pattern and the metal electrode pattern may be disposed on any one surface, and both the transparent electrode pattern and the metal electrode pattern may be disposed on the upper surface.
  • an insulating pattern may be disposed at a portion where the positive electrode patterns cross each other to electrically short the positive electrode patterns.
  • the touch panel sensor may be provided on an upper surface of the transparent electrode pattern, and may include a low resistance electrode pattern having a metal mesh having a lower specific resistance than the transparent electrode pattern.
  • Low-resistance electrode patterns include PEDOT (polyethylenedioxythiophene), silver nanowires, indium tin oxide (ITO), indium zinc oxide (IZO), al-doped tin oxide (ATO), al-doped zinc oxide (AZO), and carbon
  • PEDOT polyethylenedioxythiophene
  • ITO indium tin oxide
  • IZO indium zinc oxide
  • ATO al-doped tin oxide
  • AZO al-doped zinc oxide
  • the conductivity of the transparent electrode pattern which may include any one of the nanotubes (CNT) may be improved.
  • the dummy electrode pattern may include a dummy electrode pattern disposed between the transparent electrode pattern and the metal electrode pattern and having a mesh shape of a metal that is electrically separated from the transparent electrode pattern and the metal electrode pattern.
  • the dummy electrode pattern may be formed of the same material as the metal electrode pattern or another metal or alloy material, and may be formed in an area where the transparent electrode pattern or the metal electrode pattern is not formed on the upper surface of the lower insulating substrate.
  • the dummy electrode pattern can keep the signal sensitivity almost the same without variation.
  • the sensitivity of the signal can be greatly improved.
  • the dummy between the metal electrode pattern and the transparent electrode pattern When the electrode pattern is formed, 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 upper insulating substrate may be further disposed on the lower insulating substrate to protect both electrode patterns.
  • an optical adhesive layer for bonding two insulating substrates to each other may be used between the lower insulating substrate and the upper insulating substrate.
  • the optical adhesive layer may have a light diffusion function.
  • the contour of the metal electrode pattern may be prevented from being visible from the outside by light emitted from the display disposed under the touch panel sensor.
  • a low resistance electrode pattern having a mesh shape of a metal having a lower specific resistance than the transparent electrode pattern may be disposed on the upper surface of the transparent electrode pattern.
  • the dummy electrode pattern having a mesh shape of a metal electrically separated from the transparent electrode pattern and the metal electrode pattern may be disposed between the transparent electrode pattern and the metal electrode pattern.
  • the metal electrode pattern, the low resistance electrode pattern, and the dummy electrode pattern are provided on the transparent electrode pattern for the metal electrode pattern, the low resistance electrode pattern, and the dummy electrode pattern after providing the transparent electrode pattern on the upper surface of the lower insulating substrate.
  • the laminated metal layers can be patterned at one time.
  • the metal layer may be formed using at least one of copper / titanium (Cu / Ti), molybdenum (Mo), chromium (Cr), and black chromium (Black Chrome), and copper / titanium, molybdenum, and chromium.
  • the metal electrode pattern, the low resistance electrode pattern, and the dummy electrode pattern provided with a metal capable of preventing reflection of light or dark color, such as, and black chrome, may be prevented from shining externally.
  • the transparent electrode pattern may include a plurality of extension portions provided in a line and a plurality of bridge portions connecting the plurality of extension portions, and the metal electrode pattern may include crossing portions disposed across the extension portions.
  • opposite edges between the extensions adjacent to each other may be parallel to each other, and the intersection may have a constant width in the longitudinal direction of the intersection, and the edge along the longitudinal direction of the intersection and the edge of the extension may be parallel to each other.
  • the transmitter electrode pattern of the touch panel sensor and the outer edge of the receiver electrode pattern pass as close as possible, so that the change in the electric field may be larger than when using the conventional upper and lower ITO electrodes having a simple straight structure.
  • it induces a more active capacitance change, increases the sensitivity of the touch panel sensor, and reduces the touch error to near 0%.
  • the metal electrode pattern may be provided in the form of grouped parallel lines in which at least one of the upper and lower ends of two or more intersections adjacent to each other is electrically connected.
  • a method of manufacturing a touch panel sensor which is placed on a display and senses a contact position of an object, provides a transparent electrode pattern by patterning a transparent electrode layer provided on one surface of a lower insulating substrate. Step, patterning the insulating layer provided on the transparent electrode pattern to provide an insulating pattern, and patterning a metal layer provided on the transparent electrode pattern and electrically separated from the transparent electrode pattern by the insulating pattern, and the transparent electrode pattern and It may include providing a metal electrode pattern of the mesh shape provided to cross.
  • the metal layer provided on the upper surface of the transparent electrode pattern may be patterned into a low resistance electrode pattern having a mesh shape of a metal having a lower specific resistance than the transparent electrode pattern.
  • the metal layer disposed between the transparent electrode pattern and the metal electrode pattern may be patterned into a dummy electrode pattern having a mesh shape of metal electrically separated from the transparent electrode pattern and the metal electrode pattern.
  • a low resistance electrode pattern provided on an upper surface of the transparent electrode pattern and having a mesh shape of a metal having a lower specific resistance than the transparent electrode pattern, and disposed between the transparent electrode pattern and the metal electrode pattern to be electrically connected to the transparent electrode pattern and the metal electrode pattern.
  • the dummy electrode pattern may have a mesh shape of a metal separated by the metal, and the metal electrode pattern, the low resistance electrode pattern, and the dummy electrode pattern may be provided at a time by patterning a metal layer.
  • a transparent electrode pattern using a conductive ceramic, such as ITO is used as the lower electrode that is disposed to cross each other and induces a change in capacitance. Since the limit of is less than that of the conventional upper electrode using ITO, it is relatively free from the limitation of the total area of the touch panel sensor.
  • the metal electrode pattern is relatively free to increase the length even if it is thin can be provided in a width that is not visible from the outside, moreover, the metal electrode pattern according to the present invention is provided in a mesh (mesh) shape to the naked eye from the outside Not well checked
  • the transparent electrode pattern or the metal electrode pattern may be disposed on the upper surface of the lower insulating substrate, and the upper insulating substrate for protecting both electrode patterns may be bonded to the lower insulating substrate by using an optical adhesive layer.
  • the optical adhesive layer having a light diffusion function it is possible to prevent the contour of the metal electrode pattern from being visible from the outside by the light irradiated from the display.
  • the metal electrode pattern, the low resistance electrode pattern, and the dummy electrode pattern may be formed on the upper surface of the lower insulating substrate.
  • Metal layers for the electrode pattern, the low resistance electrode pattern, and the dummy electrode pattern may be patterned and provided at a time.
  • the touch panel sensor according to the present invention crosses the transparent electrode pattern and the metal electrode pattern.
  • the transparent electrode pattern is not a simple linear shape but has a different width and the extension portion connecting the bridge portion, and by placing the metal electrode pattern across the bridge portion, to reduce the touch error that is limited in the prior art, Alternatively, the touch efficiency can be greatly improved.
  • the touch panel sensor of the present invention allows the outer edges of the transparent electrode pattern and the metal electrode pattern to pass as close as possible, so that the change in the electric field may be greater than when using the conventional upper and lower ITO electrodes having a simple straight structure. By inducing a change in the capacitance which is more active, the sensitivity of the touch panel sensor is further increased, and the touch error can be reduced to near 0%.
  • the metal electrode pattern is provided in a grouped parallel line shape in which at least one side of the upper and lower ends of two or more intersections adjacent to each other is electrically connected, thereby reducing the electric field than the conventional upper ITO electrode. Induce a large change, thereby further increasing the sensitivity of the touch panel sensor.
  • a control unit having fewer leads than the total number of intersections may be used by tying several intersections together while greatly increasing the number of intersections to improve sensitivity.
  • FIG. 1 is a perspective view illustrating a conventional mutual 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 an exploded perspective view of a touch panel sensor according to another exemplary embodiment of the present invention.
  • FIG. 4 is a front view illustrating an arrangement structure of a transparent electrode pattern and a metal electrode pattern disposed on an upper surface of a lower insulating substrate.
  • FIG. 5 is a front view illustrating an arrangement structure of a transparent electrode pattern and a metal electrode pattern disposed on an upper surface of a lower insulating substrate in a touch panel sensor according to another exemplary embodiment of the present invention.
  • FIG. 6 is a front view of a lower insulating substrate of a touch panel sensor according to another exemplary embodiment of the present invention.
  • FIG. 7 is a front view of an upper insulating substrate of a touch panel sensor according to another embodiment of the present invention.
  • the touch panel sensor 100 includes a lower insulating substrate 110, a transparent electrode pattern 120, an upper insulating substrate 130, a metal electrode pattern 140, and an optical adhesive layer 150. .
  • the touch panel sensor 100 may detect this when the user touches the touch panel sensor 100, and since the touch panel sensor 100 is positioned on the upper portion of the display, the lower insulation substrate 110, the transparent electrode pattern 120, and the upper insulation are basically provided.
  • the substrate 130, the metal electrode pattern 140, and the optical adhesive layer 150 should not obstruct the backside display.
  • the lower insulating substrate 110 is disposed on the upper portion of the display, and the upper insulating substrate 130 is bonded through the lower insulating substrate 110 and the optical adhesive layer 150, and is transparent by the insulating optical adhesive layer 150.
  • the metal electrode patterns 120 and 140 are electrically shorted to each other.
  • the optical adhesive layer 150 may use an optical adhesive film or an optically clear adhesive (OCA) film, and may optically bond the lower insulating substrate 110 and the upper insulating substrate 130 to each other.
  • OCA optically clear adhesive
  • the plurality of transparent electrode patterns 120 are arranged side by side in one direction on the upper surface of the lower insulating substrate 110, and the metal electrode patterns 140 are disposed on the lower surface of the upper insulating substrate 130.
  • the plurality is arranged side by side to intersect.
  • the metal electrode pattern 140 is relatively smaller than the width of the transparent electrode pattern 120, when a part of the body approaches the metal electrode pattern 140 positioned on the transparent electrode pattern 120, the transparent electrode pattern 120 ) And a change in capacitance value formed at the intersection of the metal electrode pattern 140 and the touch panel sensor 100 may check the change and calculate the touch position.
  • a transparent electrode pattern 120 using a conductive ceramic such as ITO is used as a lower electrode intersecting each other to induce a capacitance change, but the metal electrode pattern ( By using 140, the length limit is less than that of the conventional upper electrode using ITO, which makes it relatively free from the limitation of the total area of the touch panel sensor.
  • the metal electrode pattern 140 may be provided with a width that is relatively free to increase the length even if it is thin, so that it is not visible from the outside (a width of about 100 ⁇ m or less), and furthermore, the metal electrode according to the present invention.
  • the pattern 140 is provided in a mesh shape and is hardly visually recognized from the outside.
  • the metal electrode pattern 140 that does not have a mesh shape may not be visually confirmed when the width of the metal electrode pattern 140 is at least 50 ⁇ m or less, but the metal electrode pattern 140 that has a mesh shape does not have a mesh shape. Compared with, even if the width is slightly larger, it is not visually confirmed. This is because the fine metal wires 142 having a thickness of about 0.5 to 1 ⁇ m entangled with each other serve to scatter light.
  • the transparent electrode pattern 120 and the metal electrode pattern 140 are electrically connected through a connecting line made of a metal material connecting the ends and the external control unit, and are covered by window decoration described in detail in the following embodiments. Can lose.
  • a method of forming the transparent electrode pattern 120 and the metal electrode pattern 140 will be described.
  • a transparent electrode layer for the transparent electrode pattern 120 may be applied to the entire lower insulating substrate 110, and may be formed by patterning the transparent electrode pattern 120. do.
  • the metal electrode pattern 140 may also be provided through the above-described patterning process, and in some cases, a method of mixing and printing a metal powder with a curing agent may be used.
  • FIG. 3 is an exploded perspective view of a touch panel sensor according to another exemplary embodiment of the present invention
  • FIG. 4 is a front view illustrating an arrangement structure of a transparent electrode pattern and a metal electrode pattern disposed on an upper surface of a lower insulating substrate.
  • the touch panel sensor 200 may include a lower insulating substrate 210, a transparent electrode pattern 220, an insulating pattern 270, a metal electrode pattern 240, an optical adhesive layer 250, and The upper insulating substrate 230 is included.
  • the upper insulating substrate 230 is placed on the uppermost layer of the sensor to directly touch the user, and it is preferable to use tempered glass as a material having high surface strength, and the lower insulating substrate 210 may be ordinary glass. Of course, it is also possible to use reinforced plastics for both insulating substrates.
  • the transparent electrode pattern 220 and the metal electrode pattern 240 may be disposed to cross each other on the upper surface of the lower insulating substrate 210.
  • the transparent electrode pattern 220 is disposed on the upper surface of the lower insulating substrate 210.
  • the insulating pattern 270 may be disposed at a portion where the transparent electrode pattern 220 and the metal electrode pattern 240 cross each other. Thereafter, the metal electrode pattern 240 may be disposed.
  • the transparent electrode pattern 220 may serve as a transmitter electrode, and the metal electrode pattern 240 may serve as a receiver electrode.
  • the transparent electrode pattern 220 may be manufactured using ITO or IZO, ATO, AZO, carbon nanotube, etc., which have both light transmittance and conductivity, and the metal electrode pattern 240 may be provided in a mesh shape using a metal material. have.
  • a separate cover needs to be provided on the lower insulating substrate 210 because both the transparent electrode pattern 220 and the metal electrode pattern 240 are disposed on the upper surface of the lower insulating substrate 210.
  • the upper insulating substrate 230 is disposed on the lower insulating substrate 210.
  • the upper insulating substrate 230 may be bonded to the lower insulating substrate 210 through the optical adhesive layer 250, and the optical adhesive layer 250 may be used to bond the lower insulating substrate 210 and the upper insulating substrate 230.
  • An optical adhesive film or an OCA film can be used.
  • the optical adhesive layer 250 is optically transmissive, but in this embodiment, by using the optical adhesive layer 250 having a light diffusing function, the contour of the metal electrode pattern 240 is externalized by the light emitted from the display. Can be prevented from
  • a window decoration 232 is provided on the bottom of the upper insulating substrate 230 along its edge, and the window decoration 232 corresponds to the periphery of the center touch area and is formed of a wire pattern 212 using silver paste. ) To block visually. 3, the transparent electrode pattern 220 and the metal electrode pattern 240 may be electrically connected to the flexible circuit board 260 by the wire pattern 212.
  • the configuration of the touch panel sensor 200 according to the present embodiment has been described above, and the detailed shapes and effects of the transparent electrode pattern 220 and the metal electrode pattern 240 will be described below.
  • the transparent electrode pattern 220 is disposed to be electrically separated from the metal electrode pattern 240 by the insulating pattern 270, and specifically, the transparent electrode pattern 220 is in one direction. It includes a plurality of expansion portion 222 and a plurality of bridge portion 224 connecting between the plurality of expansion portion 222 provided in a line, is provided on the upper surface of the lower insulating substrate (210).
  • the metal electrode pattern 240 includes a plurality of crossing portions 241 which are provided in a line perpendicular to one direction across the expansion portions 222 and are provided on an upper surface of the lower insulating substrate 210.
  • the transparent electrode pattern 220 and the metal electrode pattern 240 is a design choice which is disposed above the intersection point, in this embodiment the transparent electrode pattern 220 is below the insulating pattern 270 at the intersection point. It is described as an example.
  • the extension part 222 of the transparent electrode pattern 220 is formed to have a relatively or significantly wider width than the bridge part 224, and the bridge part 224 is the extension part 222.
  • the bridge part 224 is the extension part 222.
  • the touch error, the touch feeling, or the touch efficiency are greatly limited by the area where two electrodes arranged up and down cross each other.
  • the transparent electrode pattern 220 and the metal are up and down.
  • the electrode pattern 240 is disposed, but the transparent electrode pattern 220 is not a simple linear shape, but has extension portions 222 having different widths and bridge portions 224 connecting them, and the metal electrode pattern 240.
  • the cross between the bridge portion 224 it is possible to reduce the touch error, which is limited in the prior art, and greatly improve the sense of touch or touch efficiency.
  • the area in which the two electrodes arranged up and down intersect with each other does not vary significantly, but the electrode structure according to the present invention greatly changes the capacitance value even though the electrode structure according to the present invention has the same crossing area. It can be derived, and will be described in detail below.
  • the conventional touch panel sensor having a simple linear structure electrode or a touch panel sensor having a transparent electrode pattern and a metal electrode pattern of the present invention are common parts.
  • the change in the capacitance value does not occur only at the portion where the two electrodes disposed completely up and down overlap, but also occurs between the transparent electrode pattern 220 and the metal electrode pattern 240 adjacent to each other.
  • the bridge portion 224 of the transparent electrode pattern 220 and the metal electrode pattern 240 overlap the expansion portion 222 in addition to the intersecting areas that are completely overlapped with each other.
  • a change in electric field that is, a change in capacitance value, occurs between the crossing portions 241 passing adjacent to the bridge portion 224 adjacently.
  • the change in the electric field is greater than in the case of using the conventional upper and lower ITO electrodes having a simple straight structure. Can be.
  • the transparent electrode pattern 220 and the metal electrode pattern 240 are not provided in a simple straight structure, but the width is widened and narrowed to provide the transparent electrode pattern 220, and a bridge having a narrow width. It is further activated by providing a metal electrode pattern 240 so as to form an intersecting area over the portions 224, and simultaneously placing the metal electrode pattern 240 and the side of the extension 222 of the transparent electrode pattern 220 in close proximity. It can lead to a change in capacitance.
  • the sensitivity of the touch panel sensor 200 can be further increased by activating a change in capacitance, and in fact, the sensitivity of the touch panel sensor 200 can be confirmed to increase.
  • the touch panel sensor 200 having the electrode structure of the present invention can improve the sensitivity and reduce the touch error to near 0%.
  • the crossing portion 241 of the metal electrode pattern 240 may be provided with a constant width in the longitudinal direction, so that the opposite edges between the adjacent extension portions 222 are parallel to each other, the intersection An edge along the longitudinal direction of the portion 241 and an edge of the extension 222 may be provided in parallel with each other.
  • the touch efficiency is not simply controlled by the crossing area, but the intersecting electrodes are not overlapped, but the electrode structure is provided to be as close to each other as possible and to increase the length adjacent to each other, thereby making the touch error close to 0%.
  • FIG. 5 is a front view illustrating an arrangement structure of a transparent electrode pattern and a metal electrode pattern disposed on an upper surface of a lower insulating substrate in a touch panel sensor according to another exemplary embodiment of the present invention.
  • the basic configuration according to the present embodiment can refer to the description and the drawings of the previous embodiment, in the present embodiment will be described with respect to the metal electrode pattern which is different from the previous embodiment.
  • the metal electrode pattern 340 may be provided in a grouped parallel line shape in which at least one of upper and lower ends of two or more intersections 341 adjacent to each other is electrically connected. The upper and lower ends of the three intersections 341 are connected.
  • crossings 341 of the multiple strands are provided in an electrically connected state at the same unit interval, and the extension portion 322 and the bridge portion 324 where each intersection portion 341 is disposed thereunder are provided.
  • the finger end when the finger is positioned adjacent to the upper part of the touch panel sensor, the finger end also forms a capacitance, and the capacitance of the plurality of transparent intersections 341 and the transparent electrode pattern 320 is changed.
  • the change in electric field may be larger than in the case of use.
  • the metal electrode pattern having a grouped parallel line shape By using the metal electrode pattern having a grouped parallel line shape through this it is possible to induce a change in the more active capacitance, it is possible to further increase the sensitivity of the touch panel sensor by activating the change in capacitance.
  • the number of the intersections 341 increases to 18, which is larger than the six of the previous embodiment, so that the area of the intersection between the intersections 341 and the bridge 324 is increased.
  • the length of the side edge of the intersection 341 disposed adjacent to the side edge of the extension 322 also increases significantly. Therefore, the sensitivity of the touch panel sensor can be greatly increased.
  • a control unit having fewer leads than the total number of the intersections 341 may be used by tying three intersections 341 in a pair while greatly increasing the number of the intersections 341.
  • one wire is connected to each of the crossing portions 341 and the capacitive sensor chip from the end of each crossing portion 341 so as to electrically connect the capacitive sensor chips that can be used as the controller. It is connected through the connecting line.
  • the number of the intersections 341 of the present embodiment is larger than that of the previous embodiment.
  • the same capacitive sensor chip as in the previous embodiments can be used.
  • FIG. 6 is a front view of a lower insulating substrate of a touch panel sensor according to another exemplary embodiment of the present invention.
  • the basic configuration according to the present embodiment can refer to the description and the drawings of the previous embodiment, in this embodiment, the low resistance electrode pattern and dummy that is different from the touch panel sensor shown in the drawings of Figures 3 and 4 It demonstrates centering on an electrode pattern.
  • the transparent electrode pattern 420 including the extension part 422 and the bridge part 424, the insulating pattern 480, and the metal electrode pattern 440 are sequentially disposed on the upper surface of the lower insulating substrate of the touch panel sensor of the present embodiment. do.
  • a low resistance electrode pattern 470 having a mesh shape of a metal having a lower specific resistance than the transparent electrode pattern 420 is provided on the top surface of the transparent electrode pattern 420.
  • the low resistance electrode pattern 470 may improve conductivity of the transparent electrode pattern 420.
  • the low resistance electrode pattern 470 extends to the upper portion of the insulating pattern 480 via the upper portion of the transparent portion 422 and the bridge portion 424 of the transparent electrode pattern 420. Not all of the low resistance electrode patterns 470 are formed on the upper surface of the bridge portion 424, which prevents the transparent electrode pattern 420 and the dummy electrode pattern 490 from being electrically connected through the low resistance electrode patterns 470. For that.
  • a dummy electrode pattern 490 having a mesh shape of a metal electrically separated from the transparent electrode pattern 420 and the metal electrode pattern 440 is disposed between the transparent electrode pattern 420 and the metal electrode pattern 440. do.
  • the dummy electrode pattern 490 may be formed of the same material as the metal electrode pattern 440 or a different metal or alloy material, and the transparent electrode pattern 420 or the metal electrode pattern 440 may be formed on the upper surface of the lower insulating substrate 410. It is formed in the non-formed area, and a part of it is also formed on the insulating pattern 480 within a range capable of maintaining insulation with the transparent electrode pattern 420 or the metal electrode pattern 440.
  • a space in an area in which the optically transparent electrode pattern 420 or the metal electrode pattern 440 is not formed may be compensated for, and the light may be prevented from being distorted.
  • a transparent electrode layer for the transparent electrode pattern 420 may be formed on the entire surface of the lower insulating substrate. Thereafter, a transparent electrode pattern 420 having a desired pattern may be obtained through a photolithography process using a photosensitive film.
  • an insulating layer for the insulating pattern 480 is formed on the entire surface of the lower insulating substrate so that the transparent electrode pattern 420 and the metal electrode pattern 440 are not electrically connected to each other.
  • an insulating pattern 480 may be obtained by patterning the insulating layer.
  • a metal layer for the metal electrode pattern 440 is provided over the entire upper surface of the lower insulating substrate 410, and patterned to obtain a mesh metal electrode pattern 440.
  • the dummy electrode pattern 490 may be provided together.
  • FIG. 7 is a front view of an upper insulating substrate of a touch panel sensor according to another embodiment of the present invention.
  • the description of the basic components according to the present embodiment may refer to the description of the foregoing embodiment described with reference to FIG. 2, which is different from the touch panel sensor illustrated in FIG. 2.
  • the dummy electrode pattern is described.
  • the touch panel sensor 500 includes a lower insulating substrate 510, a transparent electrode pattern 520, an upper insulating substrate 530, a metal electrode pattern 540, and an optical adhesive layer 550.
  • the dummy electrode pattern 590 is disposed between the metal electrode patterns 540 having a width narrower than that of the transparent electrode patterns 520.
  • the dummy electrode pattern 590 may be formed of the same material as the metal electrode pattern 540 or a different metal or alloy material, and may be formed to be electrically separated from the metal electrode pattern 540.
  • the touch panel sensor according to the present invention can be widely applied to a display for the purpose of detecting a contact position of an object.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

Capteur d'écran tactile, disposé sur un écran, servant à détecter une position de contact d'un objet, pouvant comprendre : un motif d'électrode transparent situé dans une ligne; et un motif d'électrode métallique en forme de treillis, agencé de manière à être électriquement séparé du motif d'électrode transparent, et placé de manière à croiser le motif d'électrode transparent.
PCT/KR2013/011791 2013-12-18 2013-12-18 Capteur d'écran tactile WO2015093643A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/011791 WO2015093643A1 (fr) 2013-12-18 2013-12-18 Capteur d'écran tactile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/011791 WO2015093643A1 (fr) 2013-12-18 2013-12-18 Capteur d'écran tactile

Publications (1)

Publication Number Publication Date
WO2015093643A1 true WO2015093643A1 (fr) 2015-06-25

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Cited By (1)

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US20150199049A1 (en) * 2014-01-13 2015-07-16 Lg Innotek Co., Ltd. Touch window and touch device including the same

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KR20110045800A (ko) * 2009-10-27 2011-05-04 도재훈 메쉬형 전극패턴을 갖는 터치스크린 패널
WO2011149199A2 (fr) * 2010-05-25 2011-12-01 전자부품연구원 Panneau tactile utilisant un film mince métallique, et procédé pour sa fabrication
WO2012015177A2 (fr) * 2010-07-30 2012-02-02 일진디스플레이(주) Structure de lignes d'électrode et capteur tactile capacitif l'utilisant
WO2012169864A2 (fr) * 2011-06-10 2012-12-13 (주)삼원에스티 Capteur tactile
US20130162545A1 (en) * 2011-12-26 2013-06-27 Samsung Electro-Mechanics Co., Ltd. Sensing electrode pattern of touch panel

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KR20110045800A (ko) * 2009-10-27 2011-05-04 도재훈 메쉬형 전극패턴을 갖는 터치스크린 패널
WO2011149199A2 (fr) * 2010-05-25 2011-12-01 전자부품연구원 Panneau tactile utilisant un film mince métallique, et procédé pour sa fabrication
WO2012015177A2 (fr) * 2010-07-30 2012-02-02 일진디스플레이(주) Structure de lignes d'électrode et capteur tactile capacitif l'utilisant
WO2012169864A2 (fr) * 2011-06-10 2012-12-13 (주)삼원에스티 Capteur tactile
US20130162545A1 (en) * 2011-12-26 2013-06-27 Samsung Electro-Mechanics Co., Ltd. Sensing electrode pattern of touch panel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150199049A1 (en) * 2014-01-13 2015-07-16 Lg Innotek Co., Ltd. Touch window and touch device including the same
US20170045999A1 (en) * 2014-01-13 2017-02-16 Lg Innotek Co., Ltd. Touch window and touch device including the same
US9898125B2 (en) * 2014-01-13 2018-02-20 Lg Innotek Co., Ltd. Touch window and touch device including the same
US9927913B2 (en) 2014-01-13 2018-03-27 Lg Innotek Co., Ltd. Touch window and touch device including the same
US10082908B2 (en) 2014-01-13 2018-09-25 Lg Innotek Co., Ltd. Touch window and touch device including the same
US10303292B2 (en) 2014-01-13 2019-05-28 Lg Innotek Co., Ltd. Touch window and touch device including the same
US10521048B2 (en) 2014-01-13 2019-12-31 Lg Innotek Co., Ltd. Touch window and touch device including the same

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