(19)
(11)EP 2 541 381 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.09.2017 Bulletin 2017/36

(21)Application number: 11747166.4

(22)Date of filing:  07.02.2011
(51)Int. Cl.: 
G06F 3/044  (2006.01)
G06F 3/041  (2006.01)
(86)International application number:
PCT/JP2011/052502
(87)International publication number:
WO 2011/105202 (01.09.2011 Gazette  2011/35)

(54)

INPUT DEVICE, DISPLAY DEVICE, AND PORTABLE TERMINAL

EINGABEVORRICHTUNG, ANZEIGEVORRICHTUNG UND TRAGBARES ENDGERÄT

DISPOSITIF D'ENTRÉE, DISPOSITIF D'AFFICHAGE ET TERMINAL PORTABLE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 24.02.2010 JP 2010038543

(43)Date of publication of application:
02.01.2013 Bulletin 2013/01

(73)Proprietor: Kyocera Corporation
Kyoto-shi Kyoto 612-8501 (JP)

(72)Inventors:
  • NAGATA, Yasunari
    Kirishima-shi Kagoshima 899-5195 (JP)
  • YAMAGATA, Natsuko
    Kirishima-shi Kagoshima 899-5195 (JP)
  • MINAMI, Takashi
    Kirishima-shi Kagoshima 899-5195 (JP)

(74)Representative: Viering, Jentschura & Partner mbB Patent- und Rechtsanwälte 
Am Brauhaus 8
01099 Dresden
01099 Dresden (DE)


(56)References cited: : 
EP-A1- 2 112 574
CN-A- 101 441 545
JP-A- 2002 366 291
JP-U- 3 152 611
US-A1- 2006 134 431
US-A1- 2009 002 337
EP-A1- 2 521 012
CN-A- 101 587 408
JP-A- 2010 277 354
JP-U- 3 154 829
US-A1- 2008 142 249
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present invention relates to an input device, display device and portable terminal, which detect a location at where an input operation is made by a user as an input location, for example.

    BACKGROUND ART



    [0002] As an input device, for example, there is known a capacitive-sensing-type touch panel, which captures changes in electrostatic capacity between a finger and a detection electrode to detect the input location (for example, see Patent Literatures 1 and 2).

    [0003] Such an input device includes a substrate, first detection electrodes arranged in a first direction, and second detection electrodes arranged in a second direction. The input device further includes: a first connection electrode connecting adjacent first detection electrodes; an insulator covering the first connection electrode; and a second connection electrode provided on or above the insulator, straddling over the insulator and connecting adjacent second detection electrodes.

    [0004] When the user repeatedly pushes the above input device for input operations, a stress is given on the insulator in response to the input operation. When the stress is given on the insulator, there is a possibility that the insulator is peeled off of the substrate. If the insulator is peeled off of the substrate, there is a possibility that the second connection electrode is
    disconnected, which reduces the reliability of the input device.

    Patent Literature 1: Japanese Patent Application Laid-open No. 2008-97283

    Patent Literature 2: Japanese Patent Application Laid-open No. 2008-310551



    [0005] The following prior art documents disclose further technological background for the present invention: CN 101 441 545 A, EP 2 112 574 A1, CN 101 587 408 A, US 2008/142249 A1, US 2009/002337 A1 and US 2006/134431 A1.

    [0006] CN 101 441 545 A and EP 2 112 574 A1 disclose conventional capacitive-type input devices (touch panels) which comprise first and second electrodes and an insulator, according to features a) to f) of claim 1. In CN 101 441 545 A and EP 2 112 574 A1 the insulator has only straight side portions. US 2009/002337 A1 discloses a touch panel of a capacitive-type with first and second electrodes. The insulator used in US 2009/002337 A1 has a slightly curved section on a side surface directed to its first electrodes.

    [0007] JP3152611U discloses a capacitor sensing structure of a touch panel.

    SUMMARY OF THE INVENTION



    [0008] The present invention was made in view of the above problems, and its object relates to an input device, display device and portable terminal, which improve the reliability.

    [0009] An input device according to the present invention comprises the features of claim 1. Further embodiments are described in the dependent claims.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0010] 

    FIG. 1 is a plan view illustrating a schematic configuration of an input device according to an example.

    FIG. 2 is a sectional view taken along line I-I illustrated in FIG 1.

    FIG. 3 is a sectional view taken along line II-II illustrated in FIG. 1.

    FIG. 4 is an enlarged perspective view of a portion Kl of FIG. 1.

    FIG. 5 is a sectional view illustrating a schematic configuration of a display device according to one example.

    FIG. 6 is an external view illustrating a schematic configuration of a portable terminal according to one example.

    FIG. 7 is a plan view illustrating a schematic configuration of an input device according to a first modification.

    FIG. 8 is a sectional view illustrating a schematic configuration of an input device according to a second modification.

    FIG. 9 is a sectional view illustrating the schematic configuration of the input device according to the second modification.

    FIG. 10 is a plan view illustrating the schematic configuration of the input device according to the second modification.

    FIG. 11 is a sectional view illustrating a schematic configuration of an input device according to a third modification.

    FIG. 12 is a sectional view illustrating the schematic configuration of the input device according to the third modification.

    FIG. 13 is a sectional view illustrating a schematic configuration of an input device according to an embodiment of the invention.

    FIG. 14 is a sectional view illustrating the schematic configuration of the input device according to an embodiment of the invention.



    [0011] An example will be described below with reference to the drawings.

    [0012] However, for the sake of convenience in the description, the drawings referenced below illustrate simplifications of, among the constituent members of one embodiments of the present invention, only main members necessary for describing the present invention. Accordingly, an input device, a display device and a portable terminal according to the present invention may include arbitrary constituent members that are not illustrated in the drawings referenced to in this description.

    [0013] As illustrated in FIG. 1, an input device X1 according to one example is a capacitive-sensing-type touch panel, and has an input region EI where input operations are made by a user and an outer region EO located outside of the input region EI.

    [0014] As illustrated in FIGS. 1 to 3, the input device Xl has a substrate 2.

    [0015] The substrate 2 plays a role in supporting first detection electrodes 3a, first connection electrodes 3b, second detection electrodes 4a, and second connection electrodes 4b (which will be described later) in the input region EI, and also plays a role in supporting wiring conductors 6 (which will be described later) in the outer region EO. The substrate 2 has a first main surface 2a, and a second main surface 2b opposite the first main surface 2a. The substrate 2 is configured to be appropriately transmissive to light in a direction intersecting these main surfaces 2a and 2b (arrow E-F direction), and also to have insulation properties. The materials of the substrate 2 include, for example, those having light transparency such as a transparent glass and a transparent plastic, in particular, preferably a transparent glass from the visibility point of view. In this specification, "transparency" means having transparent properties with respect to visible light. Although the substrate 2 according to this example has a substantially rectangular shape in the plan view, it is not limited thereto. For example, it may have a circular shape or polygonal shape.

    [0016] As illustrated in FIGS. 2 to 4, the first detection electrodes 3a, the first connection electrodes 3b, the second detection electrodes 4a, the second connection electrodes 4b, and insulators 5 are provided on or above the first main surface 2a of the substrate 2, which corresponds to the input region EI.

    [0017] The first detection electrodes 3a play a role in detecting, in a first direction (arrow A-B direction), the input location of a finger F1 of the user that has come closer to the input region EI, and have the function of producing electrostatic capacity between the input region EI and the finger F1. That is, the first detection electrodes 3a are spaced apart from each other at a predetermined spacing, and provided along a second direction (arrow C-D direction) on or above the first main surface 2a of the substrate 2. From the point of view of improving the detection sensitivity, the first detection electrodes 3a have a substantially rhombus shape in the plan view, but it is not limited thereto.

    [0018] The first connection electrodes 3b are members that each play a role in electrically connecting adjacent first detection electrodes 3a. The first connection electrodes 3b are provided on or above the first main surface 2a of the substrate 2.

    [0019] The second detection electrodes 4a play a role in detecting, in a second direction (arrow C-D direction), the input location of the finger F1 of the user that has come closer to the input region EI, and have the function of producing electrostatic capacity between the input region EI and the finger F1. The second direction in this example is a direction perpendicular to the first direction. That is, the second detection electrodes 4a are spaced apart from each other at a predetermined spacing, and provided along the first direction (arrow A-B direction) on or above the first main surface 2a of the substrate 2. From the point of view of improving the detection sensitivity, the second detection electrodes 4a have a substantially rhombus shape in the plan view, but it is not limited thereto.

    [0020] Each of the second connection electrodes 4b plays a role in electrically connecting adjacent second detection electrodes 4a. The second connection electrode 4b is provided on or above the insulator 5 so as to be insulated from the first connection electrode 3b and to straddle over the insulator 5. Here, the insulator 5 is provided on or above the first main surface 2a of the substrate 2 so as to cover the first connection electrode 3b. The materials of the insulators 5 may include, for example, transparent resin such as acrylic resin, epoxy resin and silicone resin.

    [0021] The materials of the above first detection electrodes 3a, the first connection electrodes 3b, the second detection electrodes 4a and the second connection electrodes 4b may include, for example, conductive members having transparent properties. The conductive members having transparent properties may include, for example, ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), ATO (Antimony Tin Oxide), AZO (Al-Doped Zinc Oxide), stannic oxide, zinc oxide and electroconductive polymer (for example, PEDOT, PSS and the like).

    [0022] Here, portions of the first detection electrodes 3a, respectively, cover a portion of the insulator 5. Therefore, even when a stress is given on the insulator 5 in response to input operations, in which the user pushes repeatedly, the input device X1 may reduce the possibility of the insulator 5 to be peeled off from the substrate 2. Thus, the input device X1 may improve the reliability as compared with the above conventional input device.

    [0023] In addiction, as illustrated in FIG. 4, in the plan view, it is preferred that ends 31a of the adjacent first detection electrodes 3a, respectively, are provided to interpose the second connection electrode 4b therebetween, and to cover both ends 51 of the insulator 5, respectively. In this manner, the insulator 5 is covered by not only the second connection electrode 4b, but also two ends 31a of first detection electrodes 3a. Therefore, the input device X1 may reduce the possibility of the insulator 5 to be peeled off from the substrate 2.

    [0024] As in this example it is preferred that the insulator 5 has a rectangular shape, and preferred that the ends 31a of the adjacent first detection electrodes 3a, respectively, are provided to interpose the second connection electrode 4b therebetween, and to cover corners 51 of the insulator 5, respectively. In this example, since the corners 52 of the insulator 5 have a substantially right angle in the plan view, the insulator 5 is easy to be peeled off from the substrate 2 from the corners 52. Therefore, as in this example the possibility of the insulator 5 to be peeled off from the substrate 2 may be reduced by providing the ends 31a of the adjacent first detection electrodes 3a in a manner so as to cover the corners 52 of the insulator 5.

    [0025] Furthermore, since the insulator 5 is covered with not only the second connection electrode 4b but also with the two ends 31a of the first detection electrodes 3a, respectively, in the plan view, the possibility that the insulator 5 adsorbs moisture may be reduced. As the possibility that the insulator 5 absorbs moisture may be reduced, the input device X1 may improve the reliability as compared with the above conventional input device. This is because the second connection electrode 4b and the portion of the first detection electrodes 3a positioned on or above the insulator 5 may be eroded when the insulator 5 absorbs moisture. This is also because the adhesion between the insulator 5 and the substrate 2 and between the insulator 5 and the second connection electrode 4b may be lowered when the insulator 5 absorbs moisture.

    [0026] In addition, in the input device X1, the portion of the first detection electrode 3a is provided so as to cover a portion of the insulator 5. Therefore, as illustrated in FIG. 2, distance L1 between one end 31a of the first detection electrode 3a and a corresponding second connection electrode 4b is decreased. Therefore, the input device X1 improves the detection sensitivity because the amount of change in electrostatic capacity between the first detection electrodes 3a and the second connection electrodes 4b increases as compared with the above input device.

    [0027] In addition, the wiring conductors 6 are provided on or above the first main surface 2a of the substrate 2, which corresponds to the outer region EO.

    [0028] The wiring conductors 6 are members that play a role in applying voltage to the first detection electrodes 3a and the second detection electrodes 4a. The wiring conductors 6 are electrically connected to the first detection electrodes 3a and the second detection electrodes 4a at one end, and positioned in the outer conductor region G1 at the other end. The wiring conductor 6 is made of a metallic thin film in order to obtain high rigidity and high shape stability, for example. This metallic thin film may include, for example: an aluminum film; an aluminum alloy film; a laminated film made of a chromium film and an aluminum film; a laminated film made of a chromium film and an aluminum alloy film; a silver film; a silver alloy film; and a gold alloy film. The method of forming the above metallic thin film may include, for example, a sputtering method, evaporation method, and CVD (chemical vapor deposition) method.

    [0029] A protective member 7 plays a role in protecting the first detection electrodes 3a, the second detection electrodes 4a and the wiring conductors 6 against user's input operations. Therefore, the protective member 7 is provided so as to cover the first detection electrodes 3a, the second detection electrodes 4a, and the wiring conductors 6. That is, the protective member 7 is a member where the user's finger F1 directly touches, and is bonded to the first main surface 2a of the substrate 2 through a bonding member 8. The protective member 7 may include, for example, a polyethylene terephthalate (PET) film, an acryl film, a polycarbonate film, and a resin film. In addition, the bonding member 8 may include, for example, an acrylic pressure sensitive adhesive, a silicone pressure sensitive adhesive, a rubber pressure sensitive adhesive, and a urethane pressure sensitive adhesive.

    [0030] Now, the detection principle of the input device X1 will be described.

    [0031] When the finger F1, which is an electric conductor, comes close to, touches, or pushes the protective member 7, which corresponds to the input region EI, the electrostatic capacity changes between the finger F1 and the detection electrodes 3a, 4a. Here, a position sensing driver (not illustrated) provided in the input device X1 continuously detects the changes of the electrostatic capacity between the finger F1 and the detection electrodes 3a, 4a. Upon detecting a change in the electrostatic capacity larger than a predetermined value, the position sensing driver detects the location where the change of the electrostatic capacity has been detected, as an input location. In this manner, the input device X1 detects the input locations. The type of the input device X1 detecting input locations may be either mutual capacitance type or self-capacitance type. The mutual capacitance type may detect multiple input locations simultaneously, and is thus preferable as compared with the self-capacitance type.

    [0032] As discussed above, the input device X1 improves the reliability.

    [0033] Although the above description has been made with respect to the example of the input device X1, in which input operations are made through the protective member 7, which corresponds to the input region EI, it is not limited thereto. That is, the input device may be one, in which input operations are made through the second main surface 2b, which corresponds to the input region EI. That is, the second main surface 2b of the substrate 2 may be a surface where the finger F1 of the user directly touches. Alternatively, the second main surface 2b of the substrate 2 may be a surface where the finger F1 of the user directly touches through a member such as a protective film. However, the input device X1, in which input operations are made through the protective member 7 corresponding to the input region EI, is preferable because it allows the distance between the finger F1 and the detection electrodes 3a, 4a to be short, and allows the detection sensitivity to be improved. That is, this is because the thickness of the protective member 7 is less than the thickness of the substrate 2.

    [0034] FIG. 5 is a sectional view illustrating the schematic configuration of display device Y1 according to this example. As illustrated in FIG. 5, the display device Y1 includes the above input device X1, and a liquid crystal display device Z1 arranged facing the input device X1.

    [0035] The liquid crystal display device Z1 includes liquid crystal display panel 70, a backlight 71, and a housing 72.

    [0036] The backlight 71 includes a light source 71a and a light guide plate 71b. The light source 71a is a member that plays a role in emitting light toward the light guide plate 71b, and is composed of a light emitting diode (LED), for example. Instead of a LED, a cathode fluorescent lamp (CCFL), a halogen lamp, a xenon lamp, an electro-luminescence (EL) may be employed. The light guide plate 71b is a member that plays a role in substantially evenly guiding light from the light source 71a across the undersurface of the liquid crystal display panel 70.

    [0037] The housing 72 plays a role in housing the liquid crystal display panel 70 and the backlight 71, and includes an upper housing 72a and a lower housing 72b. The materials of the housing 72 may include, for example, resins such as polycarbonate, or mentals such as stainless (SUS) and aluminum.

    [0038] Here, the input device X1 and the liquid crystal display Z1 are bended with a double-sided adhesive tape T1. That is, the input device X1 and the liquid crystal display device Z1 are bonded with the double-sided adhesive tape T1 such that the second main surface 2b of the substrate 2 of the input device X1 is arranged opposing the main surface of the liquid crystal display panel 70. The fixing member used in fixing the input device X1 and the liquid crystal display device Z1 is not limited to the double-sided adhesive tape T1, but may be an adhesive member such as thermosetting resin and ultraviolet curable resin, or a fixing structure for physically fixing the input device X1 and the liquid crystal display device Z1.

    [0039] In this manner, one may input various pieces of information through the input device X1 by making input operations on the input region EI of the input device X1, while the user sees the liquid crystal display panel 70 of the liquid display device Z1 through the input device X1. The input device X1 may be granted a function of giving various tactile impressions such as pushing feeling, tracing feeling, and texture feeling. In this case, it is achieved by furnishing the substrate of the input device X1 with one or more vibrators, and vibrating these vibrators with a predetermined frequency when a certain input operation or a certain pushing load is detected.

    [0040] The above display device Y1 is installed in a portable terminal such as a mobile phone, a smart phone and a personal digital assistant (PDA), an electronic organizer, a personal computer, a copying machine, a game terminal, and the like.

    [0041] FIG. 6 is a schematic view illustrating the schematic configuration of a portable terminal P1 according to this example. As illustrated in FIG. 6, the portable terminal P1 includes the above display device Y1, a housing 100, and operation keys 101. The housing 100 is a member that plays a role in housing the display device Y1. The operation keys 101 are keys, on which input operations are made by the user. The operation keys 101 may be operation keys displayed on a display screen, or operation keys that physically exist.

    [0042] The portable terminal P1 is provided with the above location detection driver in order to detect the input location of the input device X1. Upon detecting a change in the electrostatic capacity larger than a predetermined value, this location detection driver detects the location where the change of the electrostatic capacity has been detected, as an input location. The portable terminal P1 is provided with a control driver for controlling the operation of each part of the portable terminal P1, such as displaying an object on the display screen of the display device Y1 or controlling the transmission and reception of audio data. The control driver makes controls, for example, switching an object displayed on the display screen to another object, based on the input detection signals from the location detection driver. The control driver and the location detection driver may be physically the same driver, or they may be physically different drivers.

    [0043] The above example can be modified variously. Hereinafter, some main modifications will be described.

    [FIRST MODIFICATION]



    [0044] FIG. 7 is a plan view illustrating the schematic configuration of input device X2 according to a first modification. FIG. 7 is a plan view depicting the same part of FIG. 4. In FIG. 7, structures having the same functions of FIG. 4 are denoted with the same reference sings, and their detailed description will be omitted.

    [0045] As illustrated in FIG. 7, in the input device X2, the corners 52 of the insulator 5 have a rounded shape in the plan view. Since the corners 52 of the insulator 5 are rounded, even when a stress applies to the insulator 5, this stress is alleviated due to the rounded shape of the corners 52 of the insulator 5. In addition, in the input device X2, ends 31a of adjacent first detection electrodes 3a, respectively, are provided so as to interpose the second connection electrode 4b therebetween, and to cover the corners 52 of the insulator 5, respectively. Therefore, the input device X2 further reduces the possibility of the insulators 5 peeling off the substrate 2- Therefore, the input device X2 may further improve the reliability as compared with the input device X1.

    [SECOND MODIFICATION]



    [0046] FIGS. 8 and 9 are sectional views illustrating the schematic configuration of input device X3 according to a second modification. FIG. 10 is a plan view illustrating the schematic configuration of the input device X3 according to the second modification. FIG. 8 is a sectional view depicting the same part of FIG. 2, FIG. 9 is a sectional view depicting the same part of FIG. 3, and FIG. 10 is a sectional view depicting the same part of FIG. 4. In FIGS. 8 to 10, the structures having the same functions of FIGS. 2 to 4 are denoted with the same reference sings, and their detailed description will be omitted.

    [0047] As illustrated in FIGS. 8 to 10, the input device X3 is provided with protective films 10 on or above the first main surface 2a of the substrate 2 such that the protective film 10 covers the insulator 5. The protective film 10 may include, for example, an inorganic film and the like made of silicon dioxide. That is, in the input device X3, each second connection electrode 4b is provided on or above the upper surface of the protective film 10 provided on or above the insulator 5. In addition, in the input device X3, the ends 31a of the adjacent first detection electrodes 3a, respectively, are provided on or above the upper surface of the first main surface 2a and the protective film 10 so as to interpose the second connection electrode 4b therebetween and cover both ends 51 of the insulator 5, respectively.

    [0048] That is, the insulator 5 is covered by not only the second connection electrode 4a and the two ends 31a of first detection electrodes 3a but also by the protective film 10 in the plan view as compared with the insulators 5 of the input device X1. Therefore, even when a stress is given on the insulator 5 in response to input operations, in which, the user pushes repeatedly, the input device X3 may reduce the possibility of the insulator 5 to be peeled off from the substrate 2. Therefore, the input device X3 may improve the reliability as compared with the input device X1.

    [0049] In addition, since the insulator 5 is covered with the protective film 10, the input device X3 may inhibit the adsorption of moisture on the insulator 5 as compared with the input device X1.

    [THIRD MODIFICATION]



    [0050] FIGS. 11 and 12 are sectional views illustrating the schematic configuration of input device X4 according to a third modification. FIG. 11 is a sectional view depicting the same part of FIG. 2, and FIG. 12 is a sectional view depicting the same part of FIG. 3. In FIGS. 11 to 12, the structures having the same functions of FIGS. 2 to 3 are denoted with the same reference sings, and their detailed description will be omitted.

    [0051] As illustrated in FIGS. 11 to 12, in the input device X4, the surface roughness of a contact surface 11a of the insulator 5, which is in contact with the first detection electrodes 3a, is greater than the surface roughness of a contact surface 11b of the insulator 5, which is in contact with the second connection electrode 4b. In the third modification, the contact surface 11a of the insulator 5 has a plurality of pores 12 in order to increase the surface roughness of the contact surface 11a of the insulator 5 more than the surface roughness of the contact surface 11b of the insulator 5. The pores 12 are formed by a sandblasting method, for example. The shape, depth, numbers and the like of the pores 12 are not specifically limited. Since the surface roughness of the contact surface 11a of the insulator 5 is greater than the surface roughness of the contact surface 11b of the insulator 5, the area of the contact surface 11a of the insulator 5 increases. As the area of the contact surface 11a of the insulator 5 increases, the contact strength between the first detection electrodes 3a and the insulator 5 improves in the input device X4 as compared with the input device X1. Thus, the input device X4 further reduces the possibility of the insulators 5 to be peeled off from the substrate 2 as compared with the input device X1. Therefore, the input device X4 may improve the reliability as compared with the input device X1.

    [0052] The detection electrodes 3a and 4a and the connection electrodes 3b and 4b are formed by a sputtering method, an evaporation method or a chemical vapor deposition (CVD) method, for example. Thus, contrary to the above, if the surface roughness of the contact surface 11b of the insulator 5 is greater than the surface roughness of the contact surface 11a of the insulator 5, projections and depressions are formed around the periphery of the second connection electrode 4b located on or above the contact surface 11a of the insulator 5. If projections and depressions are formed around the periphery of the second connection electrode 4b, there is a possibility that the second connection electrode 4b and the first detection electrode 3a are inadvertently conducted to each other, and that malfunctions may occur. From this point as well, it is preferable that the surface roughness of the contact surface 11a of the insulators 5 is higher than the surface roughness of the contact surface 11b of the insulators 5.

    [0053] FIGS. 13 and 14 are sectional views illustrating the schematic configuration of input device X5 according to an embodiment of the invention. FIG. 13 is a sectional view depicting the same part of FIG. 2, and FIG. 14 is a sectional view depicting the same part of FIG. 3. In FIGS. 13 and 14, the structures having the same functions of FIGS. 2 and 3 are denoted with the same reference sings, and their detailed description will be omitted.

    [0054] As illustrated in FIGS. 13 and 14, in the input device X5, the insulator 5 has a convex curved surface 5a within a region from an end 51 to a top 53. That is, in the input device X5, each of ends 31a of adjacent first detection electrodes 3a, respectively, is positioned on or above the convex surface 5a of the insulator 5. Since the insulator 5 has the convex curved surface 5a, a stress applied to the insulator 5 is alleviated at the convex curved surface 5a. Thus, the input device X5 further reduces the possibility of the insulators 5 to be peeled off from the substrate 2 as compared with the input device X1. Therefore, the input device X5 may improve the reliability as compared with the input device A1.

    [0055] The convex surface 5a of the insulators 5 may be provided with a concave portion. In this way, a stress applied to the insulator 5 is still alleviated at the concave portion provided on or above the convex curved surface 5a of the insulator 5. Alternatively, the convex curved surface 5a of the insulator 5 may be provided with a plurality of protrusions and depressions.

    [0056] [FURTHER MODIFICATION] Although in the above examples, the description has been made of an example where the display panel bonded with an input device X1 is a liquid crystal display, it is not limited thereto. That is, the display panel equipped with the input device X1 may include a CRT, a plasma display, an organic EL display, an inorganic EL display, a LED display, a fluorescent display tube, a field emission display, a surface-conduction electron-emitter display, an electronic paper, and the like.

    [0057] In addition, although in the above examples, the description was made of an example of the display device Y1 provided with the input device X1, the input device X1 may be replaced with the input device X2, the input device X3, the input device X4, or the input device X5. Additionally, although in the above examples, the description was made of an example of the portable terminal P1 provided with the display device Y1, the display device Y1 may be replaced with a display device provided with the input device X2, the input device X3, the input device X4, or the input device X5.

    [0058] Furthermore, the above examples may be suitably combined.

    EXPLANATIONS OF LETTERS OR NUMERALS



    [0059] 
    X1-X5
    INPUT DEVICE
    Y1
    DISPLAY DEVICE
    P1
    PORTABLE TERMINAL
    2
    SUBSTRATE
    2a
    FIRST MAIN SURFACE
    2b
    SECOND MAIN SURFACE
    3a
    FIRST DETECTION ELECTRODE
    3b
    FIRST CONNECTION ELECTRODE
    4a
    SECOND DETECTION ELECTRODE
    4b
    SECOND CONNECTION ELECTRODE
    5
    INSULATOR
    5a
    CONVEX CURVED SURFACE
    51
    END OF INSULATOR
    52
    CORNER OF INSULATOR
    53
    TOP OF INSULATOR
    10
    PROTECTIVE FILM
    70
    LIQUID CRYSTAL DISPLAY PANEL (DISPLAY PANEL)
    100
    HOUSING



    Claims

    1. An input device comprising:

    a) a substrate (2);

    b) first detection electrodes (3a) provided on the substrate (2) and arrayed along a first direction;

    c) second detection electrodes (4a) provided on the substrate (2) and arrayed along a second direction;

    d) a first connection electrode (3b) provided on the substrate (2) and connecting adjacent first detection electrodes (3a);

    e) an insulator (5) provided on the substrate (2) so as to cover the first connection electrode (3b); and

    f) a second connection electrode (4b) provided on the insulator (5) so as to straddle over the insulator (5), and connecting adjacent second detection electrodes (4a),

    wherein

    el) in the first and second directions, the insulator (5) has a convex curved surface (5a) in a region from an end (51) to a top (53) thereof, and

    bl) in the first direction, an end (31a) of each of the first detection electrodes (3a) is positioned on the convex curved surface (5a) of the insulator (5) and covers a portion of the insulator (5).


     
    2. The input device according to claim 1, wherein ends (31a) of adjacent first detection electrodes (3a), respectively, interpose the second connection electrode (4b) therebetween, and provided so as to cover both ends (51) of the insulator (5), respectively.
     
    3. The input device according to claim 1, wherein
    the insulator (5) has a rectangular shape in a plan view, and
    ends (31a) of adjacent first detection electrodes (3a), respectively, interpose the second connection electrode (4b) therebetween, and provided so as to cover corners (52) of the insulator (5), respectively.
     
    4. The input device according to claim 1, wherein corners (52) of the insulator (5) has a rounded shape in a plan view, and
    ends (31a) of adjacent first detection electrodes (3a), respectively, interpose the second connection, electrode (4b) therebetween, and provided so as to cover corners (52) of the insulator (5), respectively.
     
    5. The input device according to claim 1, further comprising a protective film (10) provided on the substrate (2) so as to cover the insulator (5).
     
    6. The input device according to claim 1, wherein surface roughness of a contact surface (11a) of the insulator (5) in contact with the first detection electrodes (3a) is greater than surface roughness of a contact surface (11b) of the insulator (5) in contact with the second connection electrode (4b) .
     
    7. A display device (Y1) comprising:

    i) the input device according to claim 1; and

    ii) a display panel (70) arranged opposing the input device.


     
    8. The display device (Y1) according to claim 7, wherein the display panel (70) is a liquid crystal display panel.
     
    9. A portable terminal (Pl) comprising the display device (Yl) according to claim 7 in a housing (100).
     
    10. The input device according to claim 1, wherein

    al) the substrate (2) has a first main surface (2a) and a second main surface (2b) positioned opposite the first main surface (2a),

    g) the first detection electrodes (3a), the first connection electrodes (3b), the second detection electrodes (4a), and the insulator (5) are provided on the first main surface (2a) of the substrate (2), and

    a2) the second main surface (2b) is positioned closer to an input operation side than the first main surface (2a).


     
    11. The input device according to claim 1, wherein
    the convex curved surface (5a) of the insulator (5) is provided with a concave portion.
     
    12. The input device according to claim 1, wherein
    the concave surface (5a) of the insulator (5) is provided with a plurality of protrusions and depressions.
     


    Ansprüche

    1. Eine Eingabevorrichtung, aufweisend:

    a) ein Substrat (2),

    b) erste Detektionselektroden (3a), die auf dem Substrat (2) vorgesehen sind und entlang einer ersten Richtung angeordnet sind,

    c) zweite Detektionselektroden (4a), die auf dem Substrat (2) vorgesehen sind und entlang einer zweiten Richtung angeordnet sind,

    d) eine erste Verbindungselektrode (3b), die auf dem Substrat (2) vorgesehen ist und benachbarte erste Detektionselektroden (3a) verbindet,

    e) einen Isolator (5), der auf dem Substrat (2) vorgesehen ist, um die erste Verbindungselektrode (3b) zu bedecken, und

    f) eine zweite Verbindungselektrode (4b), die auf dem Isolator (5) vorgesehen ist, um den Isolator (5) zu überspannen, und die benachbarte zweite Detektionselektroden (4a) verbindet, wobei

    e1) der Isolator (5) in der ersten und der zweiten Richtung in einem Bereich von einem Ende (51) zu einem oberen Teil (53) davon eine konvex gekrümmte Oberfläche (5a) hat, und

    b1) in der ersten Richtung ein Ende (31a) von jeder der ersten Detektionselektroden (3a) auf der konvex gekrümmten Oberfläche (5a) des Isolators (5) positioniert ist und einen Abschnitt des Isolators (5) bedeckt.


     
    2. Die Eingabevorrichtung gemäß Anspruch 1, wobei Enden (31a) von benachbarten ersten Detektionselektroden (3a) die zweite Verbindungselektrode (4b) dazwischen anordnen und vorgesehen sind, um beide Enden (51) des Isolators (5) zu bedecken.
     
    3. Die Eingabevorrichtung gemäß Anspruch 1, wobei

    der Isolator (5) in einer Draufsicht eine rechteckige Form hat und

    Enden (31a) von benachbarten ersten Detektionselektroden (3a) die zweite Verbindungselektrode (4b) dazwischen anordnen und vorgesehen sind, um Ecken (52) des Isolators (5) zu bedecken.


     
    4. Die Eingabevorrichtung gemäß Anspruch 1, wobei Ecken (52) des Isolators (5) in einer Draufsicht eine abgerundete Form haben, und

    Enden (31a) von benachbarten ersten Detektionselektroden (3a) die zweite Verbindungselektrode (4b) dazwischen anordnen und vorgesehen sind, um Ecken (52) des Isolators (5) zu bedecken.


     
    5. Die Eingabevorrichtung gemäß Anspruch 1, ferner einen Schutzfilm (10) aufweisend, der auf dem Substrat (2) vorgesehen ist, um den Isolator (5) zu bedecken.
     
    6. Die Eingabevorrichtung gemäß Anspruch 1, wobei die Oberflächenrauigkeit einer Kontaktfläche (11a) des Isolators (5) in Kontakt mit den ersten Detektionselektroden (3a) größer als die Oberflächenrauigkeit einer Kontaktfläche (11 b) des Isolators (5) in Kontakt mit der zweiten Verbindungselektrode (4b) ist.
     
    7. Eine Anzeigevorrichtung (Y1), aufweisend:

    i) die Eingabevorrichtung gemäß Anspruch 1 und

    ii) ein Anzeige-Panel (70), das der Eingabevorrichtung gegenüber angeordnet ist.


     
    8. Die Anzeigevorrichtung (Y1) gemäß Anspruch 7, wobei das Anzeige-Panel (70) ein Flüssigkristall-Anzeige-Panel ist.
     
    9. Ein tragbares Endgerät (P1), aufweisend die Anzeigevorrichtung (Y1) gemäß Anspruch 7 in einem Gehäuse (100).
     
    10. Die Eingabevorrichtung gemäß Anspruch 1, wobei

    a1) das Substrat (2) eine erste Hauptfläche (2a) und eine zweite Hauptfläche (2b) hat, die zu der ersten Hauptfläche (2a) entgegengesetzt positioniert ist,

    g) die ersten Detektionselektroden (3a), die ersten Verbindungselektroden (3b), die zweiten Detektionselektroden (4a) und der Isolator (5) auf der ersten Hauptfläche (2a) des Substrats (2) vorgesehen sind, und

    a2) die zweite Hauptfläche (2b) näher bei einer Eingabe-Betätigungsseite als die erste Hauptfläche (2a) angeordnet ist.


     
    11. Die Eingabevorrichtung gemäß Anspruch 1, wobei die konvex gekrümmte Fläche (5a) des Isolators (5) mit einem konkaven Abschnitt versehen ist.
     
    12. Die Eingabevorrichtung gemäß Anspruch 1, wobei die konkave Oberfläche (5a) des Isolators (5) mit einer Mehrzahl von Vorsprüngen und Vertiefungen versehen ist.
     


    Revendications

    1. Un dispositif d'entrée, comportant :

    a) un substrat (2) ;

    b) des premières électrodes de détection (3a) prévues sur le substrat (2) et disposées suivant une première direction ;

    c) des deuxièmes électrodes de détection (4a) prévues sur le substrat (2) et disposées suivant une deuxième direction ;

    d) une première électrode de connexion (3b) prévue sur le substrat (2) et connectant des premières électrodes de détection (3a) adjacentes ;

    e) un isolant (5) prévu sur le substrat (2) de manière à couvrir la première électrode de connexion (3b) ; et

    f) une deuxième électrode de connexion (4b) prévue sur l'isolant (5) de manière à enjamber l'isolant (5) et connectant des deuxièmes électrodes de détection (4a) adjacentes, où :

    e1) dans les première et deuxième directions, l'isolant (5) a une surface à courbure convexe (5a) dans une région à partir d'une extrémité (51) jusqu'à une partie supérieure (53) de celui-ci, et

    b1) dans la première direction, une extrémité (31a) de chacune des premières électrodes de détection (3a) est positionnée sur la surface à courbure convexe (5a) de l'isolant (5) et couvre une partie de l'isolant (5).


     
    2. Le dispositif d'entrée selon la revendication 1, dans lequel des extrémités (31a) de premières électrodes de détection (3a) adjacentes respectivement interposent la deuxième électrode de connexion (4b) entre celles-ci, et sont prévues de façon à respectivement couvrir les deux extrémités (51) de l'isolant (5).
     
    3. Le dispositif d'entrée selon la revendication 1, dans lequel

    l'isolant (5) a une forme rectangulaire en une vue de dessus, et

    des extrémités (31a) de premières électrodes de détection (3a) adjacentes respectivement interposent la deuxième électrode de connexion (4b) entre celles-ci et sont prévues de façon à respectivement couvrir des coins (52) de l'isolant (5).


     
    4. Le dispositif d'entrée selon la revendication 1, dans lequel des coins (52) de l'isolant (5) ont une forme arrondie en une vue de dessus, et

    des extrémités (31a) de premières électrodes de détection (3a) adjacentes respectivement interposent la deuxième électrode de connexion (4b) entre celles-ci, et sont prévues de façon à respectivement couvrir des coins (52) de l'isolant (5).


     
    5. Le dispositif d'entrée selon la revendication 1, comportant en outre un film protecteur (10) prévu sur le substrat (2) de façon à couvrir l'isolant (5).
     
    6. Le dispositif d'entrée selon la revendication 1, dans lequel la rugosité de surface d'une surface de contact (11a) de l'isolant (5) en contact avec les premières électrodes de détection (3a) est supérieure à la rugosité de surface d'une surface de contact (11b) de l'isolant (5) en contact avec la deuxième électrode de connexion (4b).
     
    7. Un dispositif d'affichage (Y1), comprenant :

    i) le dispositif d'entrée selon la revendication 1 ; et

    ii) un panneau d'affichage (70) agencé opposé au dispositif d'entrée.


     
    8. Le dispositif d'affichage (Y1) selon la revendication 7, dans lequel le panneau d'affichage (70) est un panneau d'affichage à cristal liquide.
     
    9. Un terminal portable (P1) comprenant le dispositif d'affichage (Y1) selon la revendication 7 dans un boîtier (100).
     
    10. Le dispositif d'entrée selon la revendication 1, dans lequel

    a1) le substrat (2) a une première surface principale (2a) et une deuxième surface principale (2b) située opposée à la première surface principale (2a),

    g) les premières électrodes de détection (3a), les premières électrodes de connexion (3b), les deuxièmes électrodes de détection (4a) et l'isolant (5) sont prévus sur la première surface principale (2a) du substrat (2), et

    a2) la deuxième surface principale (2b) est positionnée plus proche d'un côté d'opération d'entrée que la première surface principale (2a).


     
    11. Le dispositif d'entrée selon la revendication 1, dans lequel la surface à courbure convexe (5a) de l'isolant (5) est dotée d'une partie concave.
     
    12. Le dispositif d'entrée selon la revendication 1, dans lequel la surface concave (5a) de l'isolant (5) est dotée d'une pluralité de saillies et de dépressions.
     




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    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description