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WO2015056690A1 - Écran tactile et écran tactile adapté à un dispositif d'affichage - Google Patents

Écran tactile et écran tactile adapté à un dispositif d'affichage Download PDF

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Publication number
WO2015056690A1
WO2015056690A1 PCT/JP2014/077384 JP2014077384W WO2015056690A1 WO 2015056690 A1 WO2015056690 A1 WO 2015056690A1 JP 2014077384 W JP2014077384 W JP 2014077384W WO 2015056690 A1 WO2015056690 A1 WO 2015056690A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch panel
glass
cover glass
electrode
glass substrate
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2014/077384
Other languages
English (en)
Japanese (ja)
Inventor
宏之 内田
田中　宏明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Electric Glass Co Ltd
Original Assignee
Nippon Electric Glass Co Ltd
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.)
Filing date
Publication date
Application filed by Nippon Electric Glass Co Ltd filed Critical Nippon Electric Glass Co Ltd
Priority to CN201480034093.8A priority Critical patent/CN105308546A/zh
Publication of WO2015056690A1 publication Critical patent/WO2015056690A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Definitions

  • the present invention relates to a touch panel used for a mobile phone, a smartphone, a tablet-type or notebook-type PC, a bank ATM, a ticket machine, and the like.
  • touch panels have been used in bank ATMs, game center game machines, and ticket machines such as trains and buses.
  • By attaching the touch panel to the display device it is possible to intuitively operate the device through information from the information displayed on the display device. Therefore, the device with the touch panel is easy to operate. Have.
  • touch panel makes it possible to mount an input device in the display device, it is not necessary to provide a separate input device, and the entire device can be downsized. Accordingly, in recent years, touch panels have been suitably used for mobile phones, smartphones, portable game devices, tablet PCs, and notebook PCs that require miniaturization.
  • a transparent conductive layer consisting of a vertical electrode array is provided on one side of a transparent dielectric, and a transparent conductive layer consisting of a horizontal electrode array is provided on the other side, and the operator uses a contact object such as a finger.
  • a contact object such as a finger.
  • the change in the capacitance of the electrode at the contact position can be known from the two vertical and horizontal electrode rows, and the contact position can be accurately determined. Therefore, in the capacitive touch panel, a transparent conductive film is formed on the entire surface of a transparent dielectric such as a glass substrate in a precise linear shape (lattice in the vertical and horizontal directions) (pattern) to accurately determine the contact position. Ning) is necessary.
  • Patent Document 1 proposes to provide a touch signal detection circuit that reduces signal noise input to the touch panel. Thereby, the sensitivity of the capacitive touch panel is improved to some extent.
  • Patent Document 1 when the method described in Patent Document 1 is adopted, there is a problem that the noise of the signal input to the touch panel has a large variation factor depending on the surrounding usage environment and the sensitivity of the touch panel tends to depend on the surrounding environment. It was happening.
  • the present invention has been made to solve the above-described problems of the prior art, and even if the input contact object to the touch panel is made small, a high input signal can be inherently obtained.
  • An object is to produce a touch panel with sensitivity.
  • the present invention created to solve the above problems is a touch panel that senses a contact object, and is disposed between a glass substrate, a cover glass that contacts the contact object, and the glass substrate and the cover glass. And a sensing pattern for sensing that the contact object is in contact with the cover glass, wherein the glass substrate is made of tempered glass, and the cover glass is made of a glass film.
  • the tempered glass is preferably composed of chemically tempered glass.
  • the glass film preferably has a thickness of 300 ⁇ m or less.
  • the sensing pattern includes an insulating layer, a first electrode extending in a first direction formed on one surface of the insulating layer, and the first electrode formed on the other surface of the insulating layer. And a second electrode extending in a second direction perpendicular to the first direction.
  • the sensing pattern may be formed on the glass substrate, and the cover glass may be adhered to the sensing pattern side via an adhesive layer.
  • the sensing pattern may be formed on the cover glass, and the glass substrate may be bonded to the sensing pattern side via an adhesive layer.
  • the first electrode is formed on the glass substrate
  • the second electrode is formed on the cover glass
  • an adhesive layer is used as the insulating layer, whereby the glass substrate and the cover Glass may be adhered.
  • a light shielding layer may be formed in a frame shape on the sensing pattern, and a decoration layer may be provided on the light shielding layer.
  • a display device may be mounted on the glass substrate side of a touch panel having the above-described configuration as appropriate, thereby forming a touch panel with a display device.
  • FIG. 1 is a schematic sectional view of a touch panel 1 with a display device.
  • the touch panel 10 according to the first exemplary embodiment of the present invention covers the contact object 30 between the glass substrate 11 attached to the display device 20 and the cover glass 12 in contact with the contact object 30.
  • a sensing pattern 13 for sensing that the glass 12 has been touched is formed.
  • the display device 20 is mounted on the glass substrate 11 side of the touch panel 10, the touch panel with display device 1 is obtained.
  • the glass substrate 11 requires a predetermined strength, physically tempered glass, chemically tempered glass or the like is used, and preferably chemically tempered glass is used.
  • the chemically strengthened glass used in the present invention has, as a glass composition, 50% by mass of SiO 2 50-80%, Al 2 O 3 5-25%, B 2 O 3 0-15%, Na 2 O 1-20%. It is preferable to use a tempered glass plate containing 0 to 10% of K 2 O. If the glass composition range is regulated as described above, it becomes easy to achieve both ion exchange performance and devitrification resistance at a high level.
  • the thickness of the glass substrate 11 is preferably 400 ⁇ m or more, more preferably 500 ⁇ m or more, and even more preferably 600 ⁇ m or more from the viewpoint of securing the strength of the touch panel 10 itself.
  • the plate thickness of the glass substrate 11 is preferably 1000 ⁇ m or less, more preferably 700 ⁇ m or less, and further preferably 600 ⁇ m or less.
  • the cover glass 12 silicate glass and silica glass are used, preferably borosilicate glass, soda lime glass, and aluminosilicate glass, and most preferably non-alkali glass. Glass generally has excellent weather resistance. However, when the cover glass 12 contains an alkali component, cations may drop off on the surface, so-called soda blowing may occur, and the structure may become rough. There exists a possibility that the translucency of the cover glass 12 may deteriorate.
  • the alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide), and specifically, a glass having an alkali component weight ratio of 3000 ppm or less. It is.
  • the weight ratio of the alkali component in the present invention is preferably 1000 ppm or less, more preferably 500 ppm or less, and most preferably 300 ppm or less.
  • the cover glass 12 is a glass film of 300 ⁇ m or less, preferably 200 ⁇ m or less, more preferably 100 ⁇ m or less, and still more preferably 50 ⁇ m or less. Thereby, the thickness of the cover glass 12 can be further reduced, the weight of the touch panel 10 can be reduced, and the sensitivity of the touch panel 10 can be improved. Conventionally, when 700 ⁇ m of tempered glass is used as the cover glass of the touch panel, the sensitivity of the touch panel 10 can be increased by four times or more by setting the thickness of the cover glass 12 to 200 ⁇ m, and the thickness of the cover glass 12 is 100 ⁇ m.
  • the sensitivity of the touch panel 10 can be increased to 7 times or more, and the sensitivity of the touch panel 10 can be increased to 10 times or more by setting the thickness of the cover glass 12 to 50 ⁇ m.
  • the thickness of the cover glass 12 is preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more, and further preferably 40 ⁇ m or more.
  • the distance between the contact object 30 and a sensing pattern 13 to be described later can be shortened, and the sensitivity of the touch panel 10 is improved even if the contact object 30 is downsized. Can be made.
  • tempered glass as the glass substrate 11, even if a glass film is used for the cover glass 12, the strength of the entire touch panel 10 can be secured, and the cover glass 12 can be easily damaged. Can be prevented.
  • the glass substrate 11 and the cover glass 12 can be manufactured by using a known float method, roll-out method, slot down draw method, redraw method, etc., but as shown in FIG. It is preferable that The glass substrate 11 and the cover glass 12 manufactured by the overflow down draw method do not need to be adjusted in thickness by polishing, grinding, chemical etching, or the like.
  • the overflow down draw method is a molding method in which both sides of the glass plate do not come into contact with the molded member at the time of molding, and both sides (translucent surface) of the obtained glass plate are fire-making surfaces and do not polish. Even high surface quality (surface smoothness) can be obtained. Thereby, the contact
  • a method for manufacturing the cover glass 12 will be described. Inside the forming furnace 41 of the manufacturing apparatus 40, a formed body 42 having an outer surface shape with a wedge-shaped cross section is disposed, and glass (molten glass) melted in a melting furnace (not shown) is supplied to the formed body 42. Thus, the molten glass overflows from the top of the molded body 42. And the molten glass which overflowed passes along the both sides
  • the glass ribbon G just after joining at the lower end of the formed body 42 is drawn downward while being contracted in the width direction by the cooling roller (edge roller) 43 and is thinned to a predetermined thickness.
  • the glass ribbon G having reached the predetermined thickness is sent out by a roller 44 to be gradually cooled in a slow cooling furnace (annealer), the thermal distortion of the glass ribbon G is removed, and the slowly cooled glass ribbon G is heated to about room temperature. It is designed to cool sufficiently to the temperature.
  • unnecessary portions (cooling roller 43, roller 44, etc.) present at both ends in the width direction of the glass ribbon G are used.
  • the contacted part) is cut by the longitudinal cutting device 46.
  • the cover glass 12 used by this invention can be obtained by cut
  • the cover glass 12 may be produced by cutting and removing unnecessary portions of the glass ribbon G with the longitudinal direction cutting device 46 after cutting in the width direction with the width direction cutting device 47. Further, in the manufacturing apparatus 40 described above, the method for producing the cover glass 12 by the single-wafer method has been described. However, the present invention is not limited thereto, and the longitudinal cutting device 46 cuts unnecessary portions and then cuts in the width direction. Alternatively, a glass roll may be produced by winding the glass ribbon G into a roll shape through a slip sheet, and the sensing pattern 13 described later may be produced by a so-called roll-to-roll method.
  • the method of manufacturing the cover glass 12 that is a flexible glass film has been described.
  • the bending auxiliary roller 45 is not provided.
  • the glass substrate 11 can also be manufactured in a single-wafer type by cutting it by a predetermined width with the width direction cutting device 47 while maintaining the vertical posture.
  • An antireflection film for reducing the reflectance may be provided on the cover glass 12.
  • the antireflection film is formed on the side of the cover glass 12 that contacts the contact object 30.
  • As the antireflection film for example, a low refractive index film having a refractive index lower than that of the cover glass 12, a low refractive index layer having a relatively low refractive index, and a high refractive index layer having a relatively high refractive index are alternately laminated.
  • a dielectric multilayer film is used.
  • the antireflection film can be formed by, for example, a sputtering method or a CVD method.
  • an anti-glare film for improving the writing quality with a stylus pen or the like may be provided on the cover glass 12.
  • the antiglare film is formed on the side of the cover glass 12 that contacts the contact object 30.
  • the antiglare film has an uneven structure.
  • the uneven structure may be an island structure that covers a part of the cover glass 12.
  • the concavo-convex structure preferably has no regularity. In this case, the antiglare function of the antiglare film is likely to be improved.
  • the antiglare film can be formed, for example, by applying a light-transmitting material such as SiO 2 by a spray method and drying it.
  • An antifouling film may be provided on the cover glass 12 to prevent adhesion of fingerprints and to impart water repellency and oil repellency.
  • the antifouling film is formed on the side of the cover glass 12 that contacts the contact object 30.
  • the antifouling film preferably contains a fluoropolymer containing silicon in the main chain.
  • the fluorine-containing polymer include a polymer having —O—Si—O— units in the main chain and having a water-repellent functional group containing fluorine in the side chain.
  • the fluorine-containing polymer can be synthesized, for example, by dehydrating condensation of silanol.
  • the antifouling film is formed on the antireflection film.
  • an antiglare film is used, an antiglare film is formed on the surface of the cover glass 12, and an antireflection film and / or an antifouling film is formed thereon.
  • the sensing pattern 13 is disposed between the glass substrate 11 and the cover glass 12 as shown in FIG.
  • the sensing pattern 13 includes an insulating layer 13a, a first electrode 13b formed on one surface of the insulating layer 13a so as to extend in the first direction, and a second surface orthogonal to the first direction on the other surface of the insulating layer 13a. And a second electrode 13c formed so as to extend in the second direction.
  • the first electrode 13b and the second electrode 13c mean that electrodes are formed so as to be orthogonal to each other, and can be read as appropriate.
  • the touch panel 10 is a parallelogram or a rhombus
  • the first direction and the second direction do not have to be orthogonal to each other. That is, the first direction and the second direction described above may be directions that are not parallel to each other but cross each other.
  • the first electrode 13b and the second electrode 13c may be jumper pins that cross each other.
  • the first electrode 13b is formed on the glass substrate 11, the insulating layer 13a is formed after the first electrode 13b is formed, and the second electrode is formed after the insulating layer 13a is formed.
  • An electrode 13c is formed.
  • the first electrode 13b functions as an electrode for a touch sensor and is formed on the surface of the glass substrate 11 on the cover glass 12 side.
  • tin-doped indium oxide (ITO), fluorine-doped tin oxide (FTO), antimony-doped tin oxide (ATO), or the like is used as the first electrode 13b.
  • ITO is preferable because of its low electric resistance.
  • ITO can be formed by, for example, a sputtering method.
  • FTO and ATO can be formed by a CVD (Chemical Vapor Deposition) method.
  • a transparent conductive layer made of the above-described ITO, FTO, or ATO is formed on the glass substrate 11.
  • a resist layer (not shown) is formed.
  • an etching process for patterning the transparent conductive layer is performed on the patterned resist film using an etching solution such as hydrochloric acid.
  • a stripping process for stripping the resist layer from the transparent conductive layer is performed using a stripping solution such as KOH to form the first electrode 13b patterned so as to extend in the first direction.
  • the insulating layer 13a is formed by applying a thermosetting resin, a photocurable resin, an ultraviolet curable resin, or the like on the first electrode 13b (the first electrode 13b is formed by photolithography, coating, screen printing, spin coating, or the like). The part not formed is formed on the glass substrate 11). Further, as the insulating layer 13a, a thermoplastic resin film such as a PET film or a glass film can be used. Thereby, since an electrode is not formed on a cover glass, even if the cover glass 12 is damaged, operation as a touch panel becomes possible.
  • the insulating layer 13a In the case of using a glass film as the insulating layer 13a, it is preferable to use an alkali-free glass having a thickness of 300 ⁇ m or less, and further a thickness of 200 ⁇ m.
  • alkali-free glass By employing alkali-free glass as the glass film of the insulating layer 13a, elution of alkali components from the insulating layer 13a can be prevented, and the first electrode 13b and the second electrode 13c described later are deteriorated. Can be prevented.
  • the first electrode 13b and a second electrode 13c described later may be formed on the insulating layer 13a first.
  • photoacryl is preferably used as the insulating layer 13a.
  • the film thickness of the insulating layer 13a is appropriately selected depending on the insulating properties of the material, but is preferably 0.5 to 300 ⁇ m and more preferably 1 to 5 ⁇ m from the viewpoint of insulation and workability.
  • the insulating layer 13a May be provided only at the intersection of the first electrode 13b and the second electrode 13c.
  • the second electrode 13c is formed by the same material and the same method as those of the first electrode 13b, except that the direction in which the second electrode 13c is formed is different from that of the first electrode 13b.
  • the cover glass 12 is bonded via the adhesive layer 14 after the second electrode 13c is formed.
  • the material of the adhesive layer 14 is not particularly limited, and a double-sided pressure-sensitive adhesive sheet, a thermoplastic adhesive sheet, a heat-crosslinkable adhesive sheet, an energy curable liquid adhesive, and the like can be used. , EVA, TPU, PVB, ionoplast resin, acrylic thermoplastic adhesive sheet, ultraviolet curable adhesive, thermosetting adhesive, room temperature curable adhesive, and the like may be used.
  • an adhesive it is preferable to use an adhesive that exhibits a transparent state after bonding.
  • the touch panel 10 As shown in FIG. 1, the touch panel 10 according to the first embodiment is provided with a fixing layer 21 on the glass substrate 11 side, and the display device 20 is fixed and attached to the display device 20. It becomes.
  • the fixing layer 21 can be made of the same material as the adhesive layer 14 described above.
  • FIG. 3 is a diagram of the touch panel 1 with a display device to which the touch panel 10 according to the second embodiment of the present invention is attached.
  • a sensing pattern 13 is formed on a cover glass 12, and then an adhesive layer 14 is laminated and a glass substrate 11 is bonded thereto.
  • Specific configurations of the glass substrate 11, the cover glass 12, the sensing pattern 13, and the adhesive layer 14 are the same as those in the first embodiment.
  • the sensing pattern 13 can be formed in a roll-to-roll manner, and the manufacturing efficiency of the touch panel 10 is improved. Will improve.
  • the sensing pattern 13 by forming the sensing pattern 13 on the cover glass 12 side, the distance from the contact object 30 to the sensing pattern 13 can be shortened, and the sensitivity of the touch panel 10 can be improved.
  • FIG. 4 is a diagram of the touch panel 1 with a display device to which the touch panel 10 according to the third embodiment of the present invention is attached.
  • the first electrode 13 b is formed on the glass substrate 11
  • the second electrode is formed on the cover glass 12
  • the glass substrate 11 is interposed through the adhesive layer 14.
  • the cover glass 12 are adhered to each other, whereby the touch panel 10 is manufactured.
  • the adhesive layer 14 also serves as the insulating layer 13a. Thereby, the expense and time which form the insulating layer 13a can be shortened.
  • Specific configurations of the glass substrate 11, the cover glass 12, the first electrode 13b, the second electrode 13c, and the adhesive layer 14 are the same as those in the first embodiment described above.
  • FIG. 5 is a diagram of the touch panel 1 with a display device to which the touch panel 10 according to the fourth embodiment of the present invention is attached.
  • a light shielding layer 15 is formed in a frame shape on the sensing pattern 13, and a decoration layer 16 is formed on the light shielding layer 15.
  • an electrode not shown
  • the decoration layer 16 By providing the decoration layer 16 on the light shielding layer 15, the portion where the light shielding layer 15 is provided can have a color other than black.
  • the sensing pattern 13 can be easily formed.
  • the sensing pattern 13 is formed on the cover glass 12 side as in the second embodiment shown in FIG. 3, the light shielding layer 15 and the decoration layer 16 need to be provided on the cover glass 12 side than the sensing pattern 13.
  • the frame portion may become a step, making it difficult to form the sensing pattern 13.
  • the fourth embodiment is the same as the first embodiment except that the light shielding layer 15 and the decoration layer 16 are provided.
  • the light shielding layer 15 is preferably a black resin.
  • the thickness of the light shielding layer 15 is preferably 1 to 10 ⁇ m, and more preferably 1 to 5 ⁇ m.
  • the decorative layer 16 is provided by performing decorative printing or the like on various color layers such as a pearl tone in addition to the black matrix and the white matrix.
  • the layer thickness of the decorative layer 16 is preferably 10 to 200 ⁇ m, more preferably 70 to 150 ⁇ m.
  • the present invention can be suitably used for a touch panel used in a mobile phone, a smartphone, a tablet type, or a notebook type PC.

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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)
  • Laminated Bodies (AREA)

Abstract

　La présente invention concerne un écran tactile (10) conçu pour détecter un objet de contact (30). L'écran tactile est caractérisé en ce qu'il comprend : un substrat de verre (11) ; un verre de revêtement (12) qui vient en contact avec l'objet de contact (30) ; et un motif de détection (13) disposé entre le substrat de verre (11) et le verre de revêtement (12). Le motif de détection (13) détecte que l'objet de contact (30) a touché le verre de revêtement (12). Le substrat de verre (11) est constitué de verre trempé. Le verre de revêtement (12) est constitué d'un film de verre. Un écran tactile adapté à un dispositif d'affichage (1) est obtenu en fixant un dispositif d'affichage (20) du côté du substrat de verre (11) de l'écran tactile (10).
PCT/JP2014/077384 2013-10-18 2014-10-15 Écran tactile et écran tactile adapté à un dispositif d'affichage Ceased WO2015056690A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201480034093.8A CN105308546A (zh) 2013-10-18 2014-10-15 触摸面板及带有显示装置的触摸面板

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013217494 2013-10-18
JP2013-217494 2013-10-18

Publications (1)

Publication Number Publication Date
WO2015056690A1 true WO2015056690A1 (fr) 2015-04-23

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JP (1) JP2015099588A (fr)
CN (1) CN105308546A (fr)
TW (1) TWI619051B (fr)
WO (1) WO2015056690A1 (fr)

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WO2018034324A1 (fr) * 2016-08-19 2018-02-22 日本電気硝子株式会社 Élément à capteur tactile, capteur tactile et unité panneau d'affichage
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JP2021077033A (ja) * 2019-11-07 2021-05-20 日本電気硝子株式会社 入力装置用ガラスフィルム

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