WO2015111871A1 - Capteur tactile - Google Patents

Capteur tactile Download PDF

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Publication number
WO2015111871A1
WO2015111871A1 PCT/KR2015/000409 KR2015000409W WO2015111871A1 WO 2015111871 A1 WO2015111871 A1 WO 2015111871A1 KR 2015000409 W KR2015000409 W KR 2015000409W WO 2015111871 A1 WO2015111871 A1 WO 2015111871A1
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WO
WIPO (PCT)
Prior art keywords
pattern
electrode
conductive pattern
conductive
electrode pattern
Prior art date
Application number
PCT/KR2015/000409
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English (en)
Korean (ko)
Inventor
이철훈
이재현
윤호동
Original Assignee
동우 화인켐 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 동우 화인켐 주식회사 filed Critical 동우 화인켐 주식회사
Publication of WO2015111871A1 publication Critical patent/WO2015111871A1/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
    • G06F3/0446—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

Definitions

  • the present invention relates to a large-area high-speed touch sensor, and in particular, a conductive pattern constituting the sensing cell and a bridge connecting the conductive pattern are formed in an alternate form in the Tx / Rx channel region to improve signal delay due to channel resistance. It relates to one touch sensor.
  • touch sensors have been widely applied in various electronic products such as mobile phones, personal digital assistants (PDAs), and handheld personal computers, where the technology of manufacturing capacitive touch sensors is most widely used.
  • the structure of a single glass type capacitive touch sensor is the main structure used for touch sensors.
  • the material for forming the touch sensing electrode layer is usually indium tin oxide (ITO).
  • ITO indium tin oxide
  • the ITO layer is formed directly on the glass substrate by sputtering and then patterned to form the pattern of the touch sensing electrode layer.
  • the pattern of the touch sensing electrode layer includes an X-axis sensing electrode pattern and a Y-axis sensing electrode pattern, in which one axis of the sensing electrode pattern crosses another axis of the sensing electrode pattern.
  • a conductive layer is used to form
  • the insulating layer is formed at the position of the X-axis sensing electrode pattern and the Y-axis sensing electrode pattern crisscross each other to electrically insulate the X-axis sensing electrode pattern from the Y-axis sensing electrode pattern.
  • the material of the conductive layer for forming the bridge structure is generally metal, and the insulating layer for electrically separating the X-axis sensing electrode pattern from the Y-axis sensing electrode pattern
  • the material is usually silicon dioxide.
  • the ITO has a problem of low recognition speed due to its RC delay when applied to a large area touch panel.
  • the structure of the touch sensor of the prior art is to form the X, Y-axis sensing pattern on the same surface as shown in Figure 1 and to connect the sensing patterns 11 of the X-axis using the transparent conductive bridge (13).
  • the sensing patterns 12 of the Y-axis are not connected by a transparent conductive bridge, but are patterned in a form that the sensing patterns are connected when the sensing pattern is formed, and the sensing patterns 11 of the X-axis are patterned to be separated from each other. It is connected by the transparent conductive bridge 13 in the process (see Republic of Korea Patent Publication No. 10-2012-0092004 and Republic of Korea Patent Publication No. 10-2013-0116583).
  • the touch sensor having such a structure does not have a sufficiently low resistance of the sensing pattern and the transparent conductive bridge, the sensitivity is lowered, and the large area is difficult.
  • the Y-axis sensing patterns are not connected by a transparent conductive bridge, but are patterned to be connected to each other when forming the sensing pattern, and the X-axis sensing patterns are patterned so as to be separated from each other and connected by the transparent conductive bridge. A difference in the resistance of the shaft occurs.
  • the present invention is to solve the problem of the touch sensor of the prior art, by forming a bridge connecting the conductive pattern and the conductive pattern constituting the sensing cell in the form of alternating in the Tx / Rx channel region signal due to the channel resistance
  • the purpose is to provide a touch sensor that can improve the delay.
  • one electrode pattern belonging to a cell constituting one sensing region and another electrode pattern belonging to a cell constituting another sensing region neighboring are inserted to alternately insert an electrode pattern and a bridge connecting the electrode pattern. It is an object of the present invention to provide a touch sensor disposed to cross conductive patterns having a structure connected to each other.
  • the present invention is a touch sensor having an auxiliary electrode line formed on one electrode pattern belonging to any one unit sensing cell constituting the conductive pattern and another electrode pattern belonging to another neighboring unit sensing cell and extending to each edge portion.
  • the purpose is to provide.
  • Touch sensor for achieving the above object is a base; A first conductive pattern having a first electrode pattern constituting one sensing cell and a second electrode pattern connected to the first electrode pattern to constitute another sensing cell adjacent thereto; And a second conductive pattern having a third electrode pattern constituting any one sensing cell and a fourth electrode pattern connected to the third electrode pattern to constitute another sensing cell adjacent to the third electrode pattern.
  • the first conductive pattern and the second conductive pattern may be repeatedly arranged such that their central axes cross each other perpendicularly.
  • a first conductive pattern bridge for electrically connecting one first conductive pattern and another first conductive pattern that is not electrically connected thereto, and an electrical connection between any one second conductive pattern and an adjacent one
  • a second conductive pattern bridge for electrically connecting other second conductive patterns.
  • the first conductive pattern bridge and the second conductive pattern bridge may be alternately formed in a region where the central axes of the first and second conductive patterns in the longitudinal direction cross each other.
  • Touch sensor for achieving another object is a substrate; A first auxiliary electrode line electrically connecting any one first conductive pattern formed on the substrate and another first conductive pattern adjacent thereto; And a second auxiliary electrode line electrically connecting one second conductive pattern formed on the substrate to another second conductive pattern adjacent thereto, wherein the first auxiliary electrode line and the second auxiliary electrode line include: The central axes of the first and second conductive patterns in the longitudinal direction alternately cross each other perpendicularly to each other.
  • Such a touch sensor according to the present invention has the following effects.
  • a bridge connecting the conductive pattern and the conductive pattern may be alternately formed in the Tx / Rx channel region, thereby improving signal delay due to channel resistance.
  • one electrode pattern and another electrode pattern belonging to a cell forming another neighboring sensing region may be arranged to cross conductive patterns having a structure in which the electrode patterns are connected to each other to secure design and process ease.
  • auxiliary electrode line By forming an auxiliary electrode line on the electrode pattern can reduce the resistance in the entire area, it is possible to large area.
  • FIG. 1 is a block diagram of a touch sensor of the prior art
  • 2a and 2b is a basic configuration of the conductive pattern of the touch sensor according to the present invention
  • FIG. 3 is a configuration diagram arranged to cross the conductive patterns according to the present invention
  • FIGS. 4A and 4B are diagrams illustrating a structure in which bridges are alternately arranged in a touch sensor according to an embodiment of the present invention.
  • 5A and 5B are diagrams illustrating a touch sensor having an auxiliary electrode line according to another exemplary embodiment of the present invention.
  • FIGS. 2A and 2B are basic configuration diagrams of the conductive pattern of the touch sensor according to the present invention.
  • the present invention is to solve the response speed degradation caused by the RC delay of the touch sensor, the RC delay (RC Delay) is the charge / discharge time of the capacitor is determined by the resistance and capacitor capacitance value in the RC circuit.
  • V (t) V 0 (1-e -t / RC )
  • Discharge: V (t) V 0 e -t / RC
  • the present invention is to minimize the RC Delay by lowering the circuit resistance (R) constituting the touch sensor, it is to insert the bridge connecting the electrode pattern and the electrode pattern in an alternate form.
  • the present invention in order to insert an electrode pattern and a bridge connecting the electrode patterns in an alternating form, one electrode pattern belonging to a cell constituting one sensing region and another electrode belonging to a cell constituting another sensing region neighboring one another
  • the patterns are arranged to cross conductive patterns having a structure in which they are connected to each other.
  • FIG. 2A illustrates a basic structure of a conductive pattern in which a central axis in a longitudinal direction is continuous on the X axis, and any one of the conductive patterns 200 is positioned in one of the first sensing cell regions and has a predetermined area.
  • the first electrode pattern 20 and the second electrode pattern 21 having a predetermined area located in another neighboring second sensing cell region have a first electrode pattern 20 and the second electrode pattern 21 ( A) It is a structure connected by the connection pattern of the area.
  • FIG. 2B illustrates a basic structure of a conductive pattern in which the central axis in the longitudinal direction is continuous on the Y axis, and any one of the conductive patterns 200 is located in one of the first sensing cell regions and has a predetermined area.
  • the third electrode pattern 22 and the fourth electrode pattern 23 positioned in another neighboring second sensing cell region and having a predetermined area have a third electrode pattern 22 and the fourth electrode pattern 23 ( B) It is a structure connected by the connection pattern of the area.
  • the basic structure of the conductive pattern according to the present invention is described in a rhombus shape, it is not necessarily necessary to have a rhombus shape, and constitutes one sensing pattern adjacent to one electrode pattern belonging to a cell constituting any one sensing area. Naturally, as long as different electrode patterns belonging to the cell are connected to each other, it is natural.
  • the basic structure of the first conductive pattern according to the present invention is that the connection pattern connecting the first electrode pattern, the second electrode pattern, and the first and second electrode patterns is formed on the same surface by the same patterning process.
  • the basic structure of the second conductive pattern is that the connection pattern connecting the third electrode pattern, the fourth electrode pattern, and the third and fourth electrode patterns is formed on the same surface by the same patterning process.
  • FIG. 3 is a configuration diagram arranged by crossing conductive patterns according to the present invention.
  • FIG. 3 is disposed such that the conductive pattern of the structure as shown in FIG. 2A is continuous with the central axis in the longitudinal direction along the X axis, and the conductive pattern of the structure as shown in FIG. The structure is shown.
  • the second conductive pattern 31 is disposed so that the central axes of the are continuous and the third electrode pattern belonging to a cell constituting one sensing region and the fourth electrode pattern belonging to a cell constituting another sensing region neighboring are connected to each other.
  • connection between the first conductive pattern 30 and another first conductive pattern 30 that is not electrically connected adjacent thereto is connected by a bridge, and the second conductive pattern 31 is not electrically connected adjacent thereto.
  • the other second conductive pattern 31 is connected by a bridge, which is described in detail as follows.
  • FIGS. 4A and 4B are diagrams illustrating a structure in which bridges are alternately arranged in a touch sensor according to an embodiment of the present invention.
  • a touch sensor may include an agent that electrically connects one of the first conductive patterns 41 disposed on the X-axis and another first conductive pattern 42 that is not electrically connected thereto.
  • first conductive pattern bridge 45 and the second conductive pattern bridge 46 may include a central axis in the longitudinal direction of the first conductive patterns 41 and 42 and the second conductive patterns 43 and 44.
  • the central axes in the longitudinal direction are alternately formed in the region perpendicular to each other.
  • the first conductive pattern bridge 45 formed on the substrate 40 belongs to a cell constituting any one sensing region constituting the second conductive patterns 43 and 44.
  • One electrode pattern Y1 and another electrode pattern Y2 belonging to a cell constituting another sensing region adjacent to each other are formed with an insulating layer 47 interposed therebetween.
  • the second conductive pattern bridge 46 may define another sensing region adjacent to one electrode pattern X1 belonging to a cell constituting any one sensing region constituting the first conductive patterns 41 and 42.
  • Other electrode patterns X2 belonging to the constituting cells are formed with the insulating film 47 interposed on the upper portion of the portion 49 connected to each other.
  • the touch sensor according to the present invention having such a structure is to minimize the signal delay due to the high channel resistance of the electrodes constituting the touch sensor, and alternate the conductive pattern bridge to reduce the resistance difference between Tx / Rx channels. It was formed as an enemy.
  • the material of the substrate for manufacturing the touch sensor according to the present invention may be appropriately selected according to the field to which the conductive pattern and the conductive pattern bridge according to the present invention are to be applied, and specific examples are glass or inorganic materials. Substrates, plastic substrates, films, or other flexible substrates, but are not limited thereto.
  • the conductive pattern may be formed using a conductive material having transparency such as ITO / Ag NW / PEDOT, and is used as a main electrode for forming capacitance of the touch sensor.
  • Tx / Rx conductive pattern in an in-plane pattern formed on the same plane, and is manufactured by pattern formation through an exposure process after PR coating.
  • the insulating layer is formed to electrically separate the conductive pattern and the conductive pattern bridge, and is formed through an exposure process after coating the organic insulating layer.
  • thermosetting resin having transparency for forming such an insulating film, and an island pattern pattern formed on only a predetermined portion of the conductive pattern bridge is preferable.
  • the conductive pattern bridge electrically connects the conductive pattern with another conductive pattern that is not electrically connected thereto, and has a low resistivity metal for improving conductivity, such as molybdenum, silver, aluminum, copper, palladium, gold, Preference is given to using metals such as platinum, zinc, tin, titanium or alloys thereof.
  • the conductive pattern constituting the electrode is affected by the external environment (moisture, air, etc.), it is preferable that a passivation film is further formed to suppress this.
  • a polymer material such as optical clear resin (OCR) may be applied and then adhered through photocuring and thermosetting.
  • OCR optical clear resin
  • a polymeric material such as OCA (Optically Clear Adhesive) may be used to bond the cover window or display panel.
  • OCA Optically Clear Adhesive
  • OCA is a film type that is applied by applying a physical force, and can be used by only bonding the front surface or the edge.
  • the structure of inserting the electrode pattern and the bridge connecting the electrode pattern according to the present invention in an alternating form can be applied to both a structure in which a transparent electrode / organic insulating film / bridge is laminated and a structure in which a bridge / organic insulating film / transparent electrode is laminated.
  • Another embodiment of the present invention is to reduce the overall resistance of Tx / Rx by applying a metal auxiliary electrode cross as follows.
  • 5A and 5B are diagrams illustrating a touch sensor having an auxiliary electrode line according to another exemplary embodiment of the present invention.
  • an auxiliary pattern is formed on one electrode pattern belonging to one unit sensing cell constituting the conductive pattern and another electrode pattern belonging to another neighboring unit sensing cell and extends to each edge portion thereof. It is formed to have an electrode line to reduce the resistance in the entire area.
  • first auxiliary electrode line formed on the X-axis conductive pattern and the second auxiliary electrode line formed on the Y-axis conductive pattern cross each other in an area where the central axes in the longitudinal direction of the first and second conductive patterns cross each other perpendicularly. Form alternately.
  • a touch sensor may include an agent that electrically connects one of the first conductive patterns 51 disposed on the X axis and another first conductive pattern 52 that is not electrically connected thereto.
  • a second auxiliary electrode for electrically connecting the first auxiliary electrode line 55 and any one second conductive pattern 53 arranged in the Y-axis and another second conductive pattern 54 adjacent thereto that is not electrically connected thereto. Line 56.
  • the first auxiliary electrode line 55 formed on the substrate 50 belongs to a cell constituting any one sensing region constituting the second conductive patterns 53 and 54.
  • One electrode pattern Y1 and another electrode pattern Y2 belonging to a cell constituting another sensing region adjacent to each other are formed with an insulating layer 57 interposed therebetween.
  • the second auxiliary electrode line 56 may include another sensing region adjacent to one electrode pattern X1 belonging to a cell constituting any one sensing region constituting the first conductive patterns 51 and 52.
  • the other electrode patterns X2 belonging to the constituting cells are formed with the insulating film 57 interposed over the portions 59 connected to each other.
  • the touch sensor according to another exemplary embodiment having the auxiliary electrode line has the basic structure of the conductive pattern as shown in FIGS. 2A and 2B.
  • the basic structure of the conductive pattern is arranged such that the central axis in the longitudinal direction is continuous with the X axis, and the first electrode pattern 20 having a certain area is located in any one first sensing cell region and And a second electrode pattern 21 having a predetermined area located in another neighboring second sensing cell area, and the first electrode pattern 20 and the second electrode pattern 21 are connected to the connection pattern of the (a) area. It is connected by the structure.
  • the basic structure of the conductive pattern is arranged such that the central axis in the longitudinal direction is continuous with the Y axis, and the second electrode pattern 22 having a certain area is located in any one of the first sensing cell areas. And a fourth electrode pattern 23 positioned in another neighboring second sensing cell region having a predetermined area, and the third electrode pattern 22 and the fourth electrode pattern 23 are connected to the connection pattern of the region (b). It is connected by the structure.
  • the first and second conductive patterns are repeatedly arranged such that the central axes of the longitudinal directions perpendicularly cross each other, and the first and second auxiliary electrode lines include one electrode pattern belonging to any one unit sensing cell constituting the conductive pattern. It is desirable to have a line shape formed on another electrode pattern belonging to another neighboring unit sensing cell and extending to each edge portion.
  • 'ITO electrode pitch' refers to an interval in which the same type of ITO pattern constituting the electrode pattern is periodically repeated as in FIG. 1, and 'ITO width' constitutes a conductive pattern as in FIG. 2B. It means the width of the portion connecting the electrode pattern and another electrode pattern.
  • an X / Y main electrode is formed on one surface, and a metal bridge is applied to the transparent electrode (ITO) to manufacture a 2 x 2 unit touch sensor.
  • the ITO sheet resistance of the manufactured touch sensor was 150 [ ⁇ / ⁇ ], the ITO electrode pitch was 4 mm in the X / Y axis direction, Cu thickness as the bridge forming material was 2000 kPa, and the metal bridge width was 8 ⁇ m.
  • the electrode patterns constituting the conductive pattern and the ITO widths of the portions connecting the other electrode patterns in both Comparative Examples (Ref.) And Examples 1 and 2 were used in two different cases. do.
  • case 1) has an ITO width of 50 ⁇ m
  • case 2) has a Y electrode.
  • ITO width is set to 25 ⁇ m.
  • the line resistance simulation result shows 1552 ⁇ on the X electrode and 2022 ⁇ on the Y electrode, and 1638 ⁇ on the X electrode and 2375 ⁇ on the Y electrode in case 2). Can be.
  • case 1) has an ITO width of 50 ⁇ m
  • case 2) has a Y electrode. ITO width was 25 micrometers.
  • Example 1 the wire resistance simulation result was 1788 ⁇ at the X electrode, 1787 ⁇ at the Y electrode, and in case 2), the result was 2006 ⁇ at the X electrode and 2005 ⁇ at the Y electrode.
  • case 1) had an ITO width of 50 ⁇ m, and case 2) had a Y electrode.
  • ITO width is set to 25 ⁇ m.
  • Example 2 the wire resistance simulation result is 303 ⁇ on the X electrode and 304 ⁇ on the Y electrode, and the case of the case 2) shows 446 ⁇ on the X electrode and 446 ⁇ on the Y electrode.
  • the resistance difference of the X / Y electrode increases as the width of the ITO constituting the Y electrode of the X / Y cross section decreases, and this alternates the bridge connecting the electrode pattern and the electrode pattern. It can be seen that the resistance of the X / Y electrode can be set to the same level by inserting the N.
  • the touch sensor according to the present invention is to improve the signal delay due to the channel resistance by forming a bridge connecting the conductive pattern and the conductive pattern constituting the sensing cell to the Tx / Rx channel region.

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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

La présente invention concerne un capteur tactile permettant d'améliorer un retard de signal provenant d'une résistance de canal, par formation: de motifs conducteurs constituant une cellule de détection; et d'un pont reliant les motifs conducteurs sur un canal Tx/Rx de façon alternée.
PCT/KR2015/000409 2014-01-21 2015-01-15 Capteur tactile WO2015111871A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2014-0007196 2014-01-21
KR1020140007196A KR102120184B1 (ko) 2014-01-21 2014-01-21 터치 센서

Publications (1)

Publication Number Publication Date
WO2015111871A1 true WO2015111871A1 (fr) 2015-07-30

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PCT/KR2015/000409 WO2015111871A1 (fr) 2014-01-21 2015-01-15 Capteur tactile

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KR (1) KR102120184B1 (fr)
TW (1) TWI676927B (fr)
WO (1) WO2015111871A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200488420Y1 (ko) 2016-02-12 2019-01-28 동우 화인켐 주식회사 터치 센서
KR102009382B1 (ko) * 2017-03-03 2019-08-09 동우 화인켐 주식회사 안테나가 구비된 터치 센서

Citations (5)

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Publication number Priority date Publication date Assignee Title
KR20110117932A (ko) * 2010-04-22 2011-10-28 전자부품연구원 정전용량 방식 터치패널 및 그 제조방법
US8410795B1 (en) * 2012-03-16 2013-04-02 Cypress Semiconductor Corporation Serpentine touch sensor pattern
US20130264095A1 (en) * 2012-04-09 2013-10-10 Novatek Microelectronics Corp. Electrode structure of capacitive touch panel
US20130277091A1 (en) * 2012-04-24 2013-10-24 Novatek Microelectronics Corp. Electrode structure of capacitive touch panel
US20130314625A1 (en) * 2012-05-22 2013-11-28 Au Optronics Corp. Touch sensing display panel and touch sensing liquid crystal display panel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101367569B1 (ko) 2010-12-29 2014-02-28 주식회사 엘지화학 터치 스크린 및 이의 제조방법
KR101926529B1 (ko) 2012-04-16 2018-12-10 엘지이노텍 주식회사 터치 패널 및 그 제조 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110117932A (ko) * 2010-04-22 2011-10-28 전자부품연구원 정전용량 방식 터치패널 및 그 제조방법
US8410795B1 (en) * 2012-03-16 2013-04-02 Cypress Semiconductor Corporation Serpentine touch sensor pattern
US20130264095A1 (en) * 2012-04-09 2013-10-10 Novatek Microelectronics Corp. Electrode structure of capacitive touch panel
US20130277091A1 (en) * 2012-04-24 2013-10-24 Novatek Microelectronics Corp. Electrode structure of capacitive touch panel
US20130314625A1 (en) * 2012-05-22 2013-11-28 Au Optronics Corp. Touch sensing display panel and touch sensing liquid crystal display panel

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KR102120184B1 (ko) 2020-06-08
TWI676927B (zh) 2019-11-11
KR20150086947A (ko) 2015-07-29
TW201530410A (zh) 2015-08-01

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