Patent Publication Number: US-2015062458-A1

Title: Input device, display device, and electronic device

Description:
TECHNICAL FIELD 
     The present invention relates to an input device, a display device, and an electronic device. 
     BACKGROUND ART 
     In recent years, a tactile feedback technology for providing various senses of touch to a user, such as senses of pressure, rubbing touch, and skin touch when the user operates an input device has been known (for example, see Patent Literature 1). In the input device using such a tactile feedback technology, for example, a detection electrode, a detection wire electrically connected to the detection electrode, and a vibration body are provided on a base. In addition, the vibration body is located on the end side of the base relative to the detection wire. 
     In the input device in the related art described above, since the vibration body is located on the end side of the base relative to the detection wire, a size of the input device may increase laterally. Meanwhile, in order to decrease the size of the input device, it is necessary to cover detection wiring on the base with an insulating layer and then dispose the vibration body on the insulating layer. However, when the vibration body is disposed on the insulating layer, electrical noise generated by the vibration body may be picked up by the detection wiring, and detection sensitivity of the input device may be degraded.
     Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2003-122507   

     SUMMARY OF INVENTION 
     The present invention has been made in view of such circumstances, and an object of the invention is to provide an input device, a display device, and an electronic device capable of reducing possibility of degradation of detection sensitivity while realizing reduction in size. 
     SOLUTION TO PROBLEM 
     According to an aspect of the present invention, there is provided an input device including: a base; a detection electrode provided on the base; a detection wire provided on the base and electrically connected to the detection electrode; an insulating layer provided on the base and covering the detection wire; a vibration body disposed on the insulating layer; and a first conductive layer provided between the vibration body and the detection wire. 
     According to an aspect of the present invention, there is provided a display device including: the input device according to the present invention; a display panel disposed to face the input device; and a housing that accommodates the display panel. 
     According to an aspect of the present invention, there is provided an electronic device including the display device according to the present invention. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a plan view illustrating a schematic configuration of an input device according to Embodiment 1. 
         FIG. 2  is a plan view illustrating a schematic configuration of the input device according to Embodiment 1 and is a view seen through a base. 
         FIG. 3  is a cross-sectional view taken along line I-I illustrated in  FIG. 2 . 
         FIG. 4  is a cross-sectional view taken along the line II-II illustrated in  FIG. 2 . 
         FIG. 5  is a plan view of an enlarged area A1 surrounded by a dash-dot line illustrated in  FIG. 2  and is a view seen through a second main surface of the base. 
         FIG. 6  is a cross-sectional view taken along the line III-III illustrated in  FIG. 5 . 
         FIG. 7  is a cross-sectional view taken along the line IV-IV illustrated in  FIG. 5 . 
         FIG. 8  is a flowchart diagram illustrating an operation example of the input device. 
         FIG. 9  is a cross-sectional view illustrating a schematic configuration of a display device according to Embodiment 1. 
         FIG. 10  is a perspective view illustrating a schematic configuration of a portable terminal according to Embodiment 1. 
         FIG. 11  is a plan view illustrating a schematic configuration of an input device according to Embodiment 2 and is a view seen through a base. 
         FIG. 12  is a plan view of an enlarged area B1 surrounded by a dash-dot line illustrated in  FIG. 11  and is a view seen through from a second main surface of the base. 
         FIG. 13  is cross-sectional view taken along the line V-V illustrated in  FIG. 12 . 
         FIG. 14  is a plan view illustrating a schematic configuration of an input device according to Embodiment 3 and is a view seen through a base. 
         FIG. 15  is a plan view of an enlarged area C1 surrounded by a dash-dot line illustrated in  FIG. 14  and is a view seen through from a second main surface of the base. 
         FIG. 16  is a plan view illustrating a schematic configuration of an input device according to Embodiment 4 and is a view seen through a base. 
         FIG. 17  is a plan view of an enlarged area D1 surrounded by a dash-dot line illustrated in  FIG. 16  and is a view seen through from a second main surface of the base. 
         FIG. 18  is a cross-sectional view taken along the line VI-VI illustrated in  FIG. 17 . 
         FIG. 19  is a plan view illustrating a schematic configuration of an input device according to Embodiment 5 and is a view seen through a base. 
         FIG. 20  is a plan view of an enlarged area E1 surrounded by a dash-dot line illustrated in  FIG. 19  and is a view seen through from a second main surface of the base. 
         FIG. 21  is a cross-sectional view taken along the line VII-VII illustrated in  FIG. 20 . 
         FIG. 22  is a plan view illustrating a schematic configuration of an input device according to Embodiment 6 and is a view seen through a base. 
         FIG. 23  is a cross-sectional view taken along the line VIII-VIII illustrated in  FIG. 22 . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, embodiments of the present invention will be described with reference to the drawings. 
     For convenience of description, however, primary constituent members necessary for explaining the present invention among constituent members of embodiments of the present invention are simplified and illustrated in respective drawings referred to hereinafter. Therefore, an input device, a display device, and an electronic device according to the present invention may include any constituent member that is not illustrated in each drawing referred to by this disclosure. 
     Embodiment 1 
     An input device X1 according to present embodiment is a projection type capacitive touch panel, as illustrated in  FIGS. 1 and 2 . The input device X1 includes an input area E1 and a non-input area E2. The input area E1 is an area in which a user can perform an input operation. The non-input area E2 is an area in which the user cannot perform an input operation. The non-input area E2 according to the present embodiment is located on the outer side of the input area E1 to surround the input area E1, but the invention is not limited thereto. For example, the non-input area E2 may be located within the input area E1. 
     In addition, the input device X1 is not limited to the projection type capacitive touch panel and may be, for example, a surface capacitive touch panel or a resistive film type touch panel. 
     The input device X1 includes a base  2 , as illustrated in  FIGS. 1 to 4 . In addition, for convenience of description, an insulator  5 , an adhesive member  14 , a conductive adhesive material  16 , a protective sheet  17 , and an adhesive layer  18  are not illustrated in  FIG. 2 . In addition, the same applies to  FIGS. 11 ,  14 ,  16  and  19 , which will be described below. 
     The base  2  serves to support a first detection electrode pattern  3 , a second detection electrode pattern  4 , and the insulator  5 . The base  2  includes a first main surface  2 A and a second main surface  2 B. The first main surface  2 A is located on the user side relative to the second main surface  2 B. The second main surface  2 B is located on the side opposite to the first main surface  2 A. The base  2  is configured to have an insulation characteristic, and to have translucency for light incident in a direction crossing the first main surface  2 A and the second main surface  2 B of the base  2 . A constituent material of the base  2  may include, for example, glass or plastic. In addition, in the present embodiment, the base  2  has a rectangular shape when viewed in plan, but the present invention is not limited thereto and may have, for example, a circular shape or a polygonal shape. 
     The first detection electrode pattern  3  generates capacitance between the first detection electrode pattern  3  and a finger F1 of the user approaching the first main surface  2 A of the base  2  corresponding to the input area E1. The first detection electrode pattern  3  serves to detect an input position in a long-side direction (in  FIG. 2 , a Y direction) of the base  2  when viewed in plan. The first detection electrode pattern  3  is provided on the second main surface  2 B of the base  2  corresponding to the input area E1. A plurality of first detection electrode patterns  3  are provided side by side in the Y direction. In addition, the first detection electrode pattern  3  includes first detection electrodes  3   a  and first inter-electrode wires  3   b.    
     The first detection electrodes  3   a  serve to generate capacitance between the first detection electrodes  3   a  and the finger F1 of the user. A plurality of first detection electrodes  3   a  are provided side by side in plan in a short-side direction (in  FIG. 2 , an X direction) of the base  2 . The first inter-electrode wires  3   b  serve to electrically connect the first detection electrodes  3   a . The first inter-electrode wires  3   b  are provided between the first detection electrodes  3   a  that are adjacent each other. 
     The second detection electrode pattern  4  generates capacitance between the second detection electrode pattern  4  and the finger F1 of the user approaching the first main surface  2 A of the base  2  corresponding to the input area E1. The second detection electrode pattern  4  serves to detect an input position in the X direction. The second detection electrode pattern  4  is provided on the second main surface  2 B of the base  2  corresponding to the input area E1. A plurality of second detection electrode patterns  4  are provided side by side in the X direction. In addition, the second detection electrode pattern  4  includes second detection electrodes  4   a  and second inter-electrode wires  4   b.    
     The second detection electrodes  4   a  serve to generate capacitance between the second detection electrodes  4   a  and the finger F1 of the user. A plurality of second detection electrodes  4   a  are provided side by side in the Y direction. The second inter-electrode wires  4   b  serve to electrically connect the second detection electrodes  4   a . The second inter-electrode wires  4   b  are provided on the insulator  5  over the insulator  5  to be electrically insulated from the first inter-electrode wires  3   b  between the second detection electrodes  4   a  that are adjacent each other. Here, the insulator  5  is provided on the second main surface  2 B of the base  2  to cover the first inter-electrode wires  3   b . In addition, in the present embodiment, a plurality of the insulators  5  are provided to cover the plurality of first inter-electrode wires  3   b , but the invention is not limited thereto and, for example, the insulator  5  may be provided over the second entire main surface  2 B of the base  2  corresponding to the input area E1 to cover the plurality of first detection electrode patterns  3 . In this case, the second detection electrodes  4   a  are also provided on the insulator  5 , in addition to the second detection electrodes  4   b . A constituent material of the insulator  5  may include, for example, a transparent resin such as an acrylic resin, an epoxy resin, a silicone resin, silicon dioxide, or silicon nitride. 
     Constituent materials of the first detection electrode pattern  3  and the second detection electrode pattern  4  described above may include conductive members having translucency. The conductive member having translucency may include, for example, indium tin oxide (ITO), indium zinc oxide (IZO), Al-doped zinc oxide (ATO), tin oxide, zinc oxide or a conductive polymer. 
     In a method of forming the first detection electrode pattern  3  and the second detection electrode pattern  4 , for example, a film of the above-described material is formed on the second main surface  2 B of the base  2  using a sputtering method, a deposition method, or a chemical vapor deposition (CVD) method. Also, a surface of this film is covered with a photosensitive resin, and a resultant film is patterned through exposure, developing, and etching processes to form the first detection electrode pattern  3  and the second detection electrode pattern  4 . 
     Next, a decorative layer  6 , a first protective layer  7 , detection wires  8 , an insulating layer  10 , a first conductive layer  11 , a second protective layer  12 , a vibration body  13 , a wiring board  15 , and a protective sheet  17  on the base  2  will be described with reference to  FIGS. 5 to 7 . 
     In addition,  FIG. 5  is a plan view of an enlarged area A1 surrounded by a dash-dot line illustrated in  FIG. 2  and is a view seen through from a second main surface side of the base.  FIG. 6  is a cross-sectional view taken along the line III-III illustrated in  FIG. 5 .  FIG. 7  is a cross-sectional view taken along the line IV-IV illustrated in  FIG. 5 . In addition, in  FIG. 5 , the decorative layer  6 , the conductive adhesive material  16 , the protective sheet  17 , and the adhesive layer  18  are not illustrated for convenience of description. In addition, the same applies to  FIGS. 12 ,  15 ,  17 , and  20  that will be described below. 
     The decorative layer  6  serves to decorate the non-input area E2 of the input device X1. The decorative layer  6  is provided on the second main surface  2 B of the base  2  corresponding to the non-input area E2. In addition, the decorative layer  6  may also be provided on the first main surface  2 A of the base  2  corresponding to the non-input area E2. If the decorative layer  6  is provided on the first main surface  2 A of the base  2  corresponding to the non-input area E2, when the vibration body  13  to be described below vibrates, a possibility of the vibration being attenuated by the decorative layer  6  can be reduced. A constituent material of the decorative layer  6  may include a material obtained by causing a coloring material to be contained in a resin material. The resin material may include, for example, an acrylic-based resin, an epoxy-based resin, or a silicone-based resin. The coloring material may include, for example, carbon, titanium, or chrome. In addition, the color of the decorative layer  6  is not limited to black and the decorative layer  6  may be colored with a color other than the black. A method of forming the decorative layer  6  may include, for example, a screen-printing method, a sputtering method, a CVD method, or a deposition method. 
     The first protective layer  7  serves to protect the decorative layer  6 . Here, serving to protect the decorative layer  6  may include, for example, serving to protect the decorative layer  6  from corrosion due to moisture absorption or serving to reduce a possibility of a material of the decorative layer  6  being changed in quality. The first protective layer  7  is provided on the second main surface  2 B of the base  2  so that the decorative layer  6  is covered with the first protective layer  7 . A constituent material of the first protective layer  7  may include, for example, an acrylic-based resin, a silicone-based resin, a rubber-based resin, a urethane-based resin, or an inorganic compound containing silicon. A method for forming the first protective layer  7  may include, for example, a transfer printing method, a spin coating method or a slit coating method. 
     The detection wires  8  serve to apply a voltage to the first detection electrode pattern  3  and the second detection electrode pattern  4 , and also serve to detect a change in capacitance generated between the first detection electrode pattern  3  and the finger F1 and between the second detection electrode pattern  4  and the finger F1. A plurality of detection wires  8  are located on the first protective layer  7 . In addition, the detection wires  8  may be located on the decorative layer  6 . Some of the plurality of detection wires  8  have one end connected to the first detection electrode pattern  3  via connection wires  9 , and the other end located in an external conduction area G1. These some detection wires  8  extend in the Y direction. In addition, the other detection wires  8  among the plurality of detection wires  8  have one end connected to the second detection electrode pattern  4  via the connection wires  9  and the other end located in the external conduction area G1. Here, the connection wires  9  are located on the second main surface  2 B of the base  2  and provided from the input area E1 to the non-input area E2. A constituent material of the connection wires  9  and a method of forming the connection wires  9  may include the same constituent material and method as those of the first detection electrode pattern  3  and the second detection electrode pattern  4 . 
     The detection wires  8  are hard and are formed of a metal thin film in order to obtain high shape stability. A constituent material of the metal thin film may include, for example, an aluminum film, an aluminum alloy film, a film obtained by laminating a chrome film and an aluminum film, a film obtained by laminating a chrome film and an aluminum alloy film, a silver film, a silver alloy film, or a gold alloy film. A method of forming the metal thin film may include, for example, a sputtering method, a CVD method or a deposition method. 
     The insulating layer  10  serves to reduce a possibility of short-circuit of the detection wires  8 . The insulating layer  10  is provided on the first protective layer  7  corresponding to the non-input area E2. The detection wires  8  are covered with the insulating layer  10 . In addition, the insulating layer  10  is not present in the external conduction area G1. Therefore, the detection wires  8  are exposed from the insulating layer  10  in the external conduction area G1. A constituent material of the insulating layer  10  and a method of forming the insulating layer  10  are the same as those of the insulator  5  or the first protective layer  7 . In addition, the insulating layer  10  may be formed at the same time as the insulator  5 . 
     The first conductive layer  11  serves to reduce a possibility of electrical noise generated by the vibration body  13  being picked up by the detection wires  8 . The first conductive layer  11  is provided between the vibration body  13  and the detection wires  8 . Specifically, the first conductive layer  11  is located on the insulating layer  10  and overlaps the detection wires  8  when viewed in plan. Therefore, it is possible to reduce a possibility of short-circuit between the detection wires  8  and the first conductive layer  11 . A constituent material of the first conductive layer  11  and a method of forming the first conductive layer  11  are the same as those of the first detection electrode pattern  3 , the second detection electrode pattern  4 , or the detection wires  8 . In addition, the first conductive layer  11  may be formed at the same time as the first detection electrode pattern  3  or the second detection electrode pattern  4 . 
     The second protective layer  12  serves to protect the first conductive layer  11 . Here, serving to protect the first conductive layer  11  may include, for example, serving to protect the first conductive layer  11  from corrosion due to moisture absorption. The second protective layer  12  is provided between the vibration body  13  and the insulating layer  10 . Specifically, the second protective layer  12  is provided on the insulating layer  10  corresponding to the non-input area E2. The first conductive layer  11  is covered with the second protective layer  12 . In addition, the second protective layer  12  is not present in the external conduction area G1. In addition, the first detection electrode pattern  3  and the second detection electrode pattern  4  may be covered with the second protective layer  12 , and may be provided on the second main surface  2 B of the base  2  corresponding to the input area E1. If the first detection electrode pattern  3  and the second detection electrode pattern  4  are covered with the second protective layer  12 , the first detection electrode pattern  3  and the second detection electrode pattern  4  can be protected so as not to be damaged due to an external shock. A constituent material of the second protective layer  12  and a method of forming the second protective layer  12  are the same as those of the first protective layer  7 . 
     The vibration body  13  serves to vibrate the base  2  when a predetermined input operation by the user is detected. The vibration body  13  is disposed on the insulating layer  10 . Specifically, the vibration body  13  is disposed on the second protective layer  12  corresponding to the non-input area E2 via the adhesive member  14 . In addition, the vibration body  13  overlaps the detection wires  8  when viewed in plan. A constituent material of the adhesive member  14  may include, for example, an ultraviolet curing resin or a thermosetting resin. In addition, two vibration bodies  13  are arranged in the X direction near short opposite sides of the base  2  when viewed in plan as illustrated in  FIG. 2 . In addition, the number or the arrangement position of the vibration bodies  13  are not particularly limited. 
     The vibration body  13  is a piezoelectric element in which a plurality of first electrode layers  13   a  and a plurality of second electrode layers  13   b  are laminated alternately via a plurality of piezoelectric layers  13   c . The vibration body  13  includes first surface electrode  13   d  electrically connected to the first electrode layers  13   a . The vibration body  13  includes second surface electrodes  13   e  electrically connected to the second electrode layers  13   b . In addition, the number of first electrode layers  13   a  and second electrode layers  13   b  is not particularly limited. In addition, in the present embodiment, the vibration body  13  is a piezoelectric element, but the present invention is not limited thereto. The vibration body  13  may be, for example, an electromagnetic vibration body, a spring, or a motor. 
     In the input device X1, the vibration body  13  is disposed on the insulating layer  10  via the first protective layer  7  and the adhesive member  14 . Therefore, in the input device X1, it is possible to realize reduction in size of the input device X1 in comparison with the case in which the vibration body is disposed on the end side of the base relative to the detection wires. However, when the vibration body is disposed on the insulating layer, a spacing distance between the vibration body and the detection wires becomes relatively small. Therefore, there is a possibility of electrical noise from the vibration body being picked up by the detection wires. Therefore, in the input device X1, the first conductive layer  11  is provided between the vibration body  13  and the detection wires  8 . Therefore, for example, even when an alternate current voltage is applied to the vibration body  13 , electrical noise generated by the vibration body  13  can be shielded by the first conductive layer  11 . Therefore, it is possible to reduce a possibility of the electrical noise being picked up by the detection wires  8  and detection sensitivity of the input device X1 being decreased. In addition, in this disclosure, “electrical noise is shielded by the first conductive layer  11 ” refers to the first conductive layer  11  shielding a part or all of the electrical noise. Thus, in the input device X1, it is possible to reduce a possibility of degradation of detection sensitivity while realizing reduction in size. 
     In addition, it is preferable for the first conductive layer  11  to overlap the entire vibration body  13  when viewed in plan, as in the present embodiment. If the first conductive layer  11  overlaps the entire vibration body  13  when viewed in plan, it is possible to further reduce a possibility of the electrical noise generated by the vibration body  13  being picked up by the detection wires  8 . 
     In addition, it is preferable for the first conductive layer  11  to be set to a ground potential. When the first conductive layer  11  is set to the ground potential, for example, the potential of the first conductive layer  11  does not substantially change even when the alternate current voltage is applied to the vibration body  13 . Therefore, it is possible to further reduce a possibility of electrical noise from the vibration body  13  being picked up by the detection wires  8  when the first conductive layer  11  is set to the ground potential. A method of setting the first conductive layer  11  to the ground potential may include, for example, a method of electrically connecting the first conductive layer  11  and a first housing  100  when the input device X1 is incorporated into a display device Y1. 
     The wiring board  15  serves to electrically connect the vibration body  13  and a tactile feedback driver (not illustrated). The wiring board  15  has control wires  15   a  and a covering layer  15   b . The control wires  15   a  are covered with the covering layer  15   b . In addition, a part of the control wires  15   a  is exposed from the covering layer  15   b . For example, a flexible printed circuit board may be used as the wiring board  15 . In addition, the control wires  15   a  exposed from the covering layer  15   b  are electrically connected to the first surface electrode  13   d  and the second surface electrode  13   e  via the conductive adhesive material  16 . The conductive adhesive material  16  may include an anisotropic conductive material containing conductive particles in an insulating resin material, a solder, or the like. 
     The protective sheet  17  serves to protect the first main surface  2 A of the base  2  so as not to be damaged due to contact of the finger F1 of the user. The protective sheet  17  is provided over the entire surface of the first main surface  2 A of the base  2  corresponding to the input area E1 and the non-input area E2 via the adhesive layer  18 . In addition, the protective sheet  17  may be provided on only the first main surface  2 A of the base  2  corresponding to the input area E1. A constituent material of the protective sheet  17  may include, for example, glass or plastic. In addition, a constituent material of the adhesive layer  18  may include, for example, an acrylic-based adhesive material, a silicone-based adhesive material, a rubber-based adhesive material, or a urethane-based adhesive material. 
     Next, an operation of the input device X1 will be described with reference to  FIG. 8 . 
     In addition, while an operation example of the input device X1 when a sense of pressure is provided to a user will be described hereinafter, the input device X1 is applicable to a case in which various senses of touch, such as a sense of rubbing touch and a sense of skin touch are provided, in addition to the sense of pressure. 
     As illustrated in  FIG. 8 , when the user presses the first main surface  2 A of the base  2  corresponding to the input area E1 via the protective sheet  17 , the vibration body  13  detects a pressing load against the base  2  (Op1). A load detection function of the vibration body  13  will be described herein. In other words, when the user presses the first main surface  2 A of the base  2  corresponding to the input area E1 via the protective sheet  17 , the base  2  is bent in a downward direction. In addition, the “down direction” in this disclosure refers to a direction from the first main surface  2 A of the base  2  to the second main surface  2 B. When the base  2  is bent in the down direction, the vibration body  13  is also bent in the down direction. In other words, a curvature amount of the vibration body  13  changes according to the pressing load against the base  2 . In the present embodiment, since the vibration body  13  is a piezoelectric element, the vibration body  13  can convert the curvature amount to a voltage according to the curvature amount. As a result, the pressing load of the base  2  can be detected by the vibration body  13 . In addition, while the example in which the load detection function is realized by the vibration body  13  has been described above, the invention is not limited thereto and, for example, the load detection function may be realized by a load sensor such as a strain sensor. 
     Also, the tactile feedback driver (not illustrated) determines whether the pressing load detected in Op1 is equal to or greater than a threshold when the operation of pressing the first main surface  2 A by the user is an operation of pressing a predetermined input object (Op2). In addition, the tactile feedback driver is electrically connected to the vibration body  13  via the control wires  15   a  of the wiring board  15 . In addition, the tactile feedback driver, for example, is mounted on the covering layer  15   b  of the wiring board  15  or on a circuit board  500  when the input device X1 is incorporated in the display device Y1. 
     Also, if it is determined that the pressing load detected in Op1 is equal to or more than the threshold (YES in Op2), the tactile feedback driver causes the vibration body  13  to expand and contract in the X direction illustrated in  FIG. 2  (Op3). Also, the base  2  vibrates to be bent in a thickness direction (a Z direction in  FIGS. 3 and 4 ) due to the vibration body  13  expanding and contracting in Op3 (Op4). Accordingly, the sense of pressure is provided to the user, who has pressed the first main surface  2 A. In contrast, if it is determined that the pressing load detected in Op1 is less than the threshold (NO in Op2), the tactile feedback driver ends the process of  FIG. 8 . 
     As described above, in the input device X1, it is possible to reduce a possibility of degradation of detection sensitivity while realizing reduction in size. 
     Next, the display device Y1 including the input device X1 will be described with reference to  FIG. 9 . 
     The display device Y1 according to the present embodiment includes the input device X1, the first housing  100 , support members  200 , a display panel  300 , a backlight  400 , and the circuit board  500 , as illustrated in  FIG. 9 . 
     The input device X1 is accommodated in the first housing  100  so that the input area E1 is exposed. A constituent material of the first housing  100  may include, for example, a resin such as polycarbonate or a metal such as stainless steel or aluminum. In addition, the input device X1 is provided on a support portion  101  of the first housing  100  via the support members  200 . Therefore, when the user presses the input device X1, the support members  200  become fulcrums and it is easy for the input device X1 to be bent in the down direction. Therefore, it is easy for the vibration body  13  to be bent in the down direction, and it is possible to increase detection sensitivity of the pressing load by the user. In addition, an arrangement position or the number of support members  200  is not particularly limited. A constituent material of the support members  200  may include, for example, a synthetic resin such as polyethylene terephthalate. 
     The display panel  300  serves to display an image or a video. The display panel  300  is provided to face the input device X1 and is accommodated in the first housing  100 . In addition, the first housing  100  may be removed, and the input device X1 may be directly provided on the display panel  300  via the support members  200 . In addition, the display panel  300  according to the present embodiment is a liquid crystal panel using a liquid crystal structure, but is not limited thereto and may be a plasma display, an organic EL display, a field emission display (FED), a surface-conduction electron-emitter display (SED), or an electronic paper. 
     The backlight  400  serves to cause light to be incident on an entire lower surface of the display panel  300 . The backlight  400  is provided behind the display panel  300 . The backlight  400  includes a light source  401  and a light guide plate  402 . The light source  401  is a member serving to emit light toward the light guide plate  402 , and includes light emitting diodes (LEDs). In addition, the light source  401  may not include LEDs and, for example, may include a cold cathode fluorescent lamp, a halogen lamp, a xenon lamp or an electro-luminescence (EL). The light guide plate  402  is a member serving to guide the light from the light source  401  to the entire lower surface of the display panel  300  substantially uniformly. In addition, the backlight  400  is unnecessary when a display panel using a self-light emitting element is used in place of the display panel  300 . 
     The circuit board  500 , for example, serves to support electronic parts such as the tactile feedback driver, a control circuit of the display panel  300 , a control circuit of the backlight  400 , resistors or capacitors. The circuit board  500  is located behind the backlight  400 . A constituent material of the circuit board  500  may include, for example, a resin material. 
     Thus, the display device Y1 can input various pieces of information while providing senses of touch to the user when the user performs an input operation on the input area E1 while viewing the display panel  300  through the input device X1. 
     As described above, it is possible to reduce a possibility of degradation of detection sensitivity while realizing reduction in size since the display device Y1 includes the input device X1. 
     Next, a portable terminal Z1 including the display device Y1 will be described with reference to  FIG. 10 . 
     The portable terminal Z1 according to the present embodiment is a smartphone terminal, as illustrated in  FIG. 10 . In addition, the portable terminal Z1 is not limited to the smartphone terminal and may be, for example, a portable phone, a tablet terminal or a personal digital assistant (PDA). 
     The portable terminal Z1 includes the display device Y1, a sound input unit  601 , a sound output unit  602 , a key input unit  603 , and a second housing  604 . 
     The sound input unit  601  serves to input the voice of the user and includes, for example, a microphone. The sound output unit  602  serves to output a voice or the like from another party and includes, for example, an electromagnetic speaker or a piezoelectric speaker. In addition, the sound output unit  602  may be configured to vibrate the base  2  of the input device X1 using the vibration body  13  of the input device X1 to output the voice. The key input unit  603  includes mechanical keys. The key input unit  603  may be operation keys displayed on a display screen. The second housing  604  serves to accommodate the display device Y1, the sound input unit  601 , the sound output unit  602 , and the key input unit  603 . In addition, the second housing  604  may be removed, and the sound input unit  601 , the sound output unit  602 , and the key input unit  603  may be accommodated in the first housing  100  of the display device Y1. A constituent material of the second housing  604  may include the same constituent material as that of the first housing  100 . 
     In addition, the portable terminal Z1 may include a digital camera functional unit, a one-segment broadcasting tuner, a short-range wireless communication unit such as an infrared communication functional unit, a wireless LAN module, and various interfaces according to necessary functions, but illustration and description of details thereof will be omitted. 
     As described above, it is possible to reduce a possibility of degradation of detection sensitivity while realizing reduction in size since the portable terminal Z1 includes the display device Y1. 
     Here, the display device Y1 may be included in various electronic devices such as an electronic diary, a personal computer, a copier, a terminal device for games, a television, a digital camera, or a programmable indicator used for an industrial use, in place of the portable terminal Z1 described above. 
     In addition, one specific example of the present embodiment of the invention has been shown in the embodiment described above, and various modifications can be made. Hereinafter, some primary modification examples will be shown. 
     Embodiment 2 
       FIG. 11  is a plan view illustrating a schematic configuration of an input device X2 according to Embodiment 2 and is a view seen through a base  2 .  FIG. 12  is a plan view of an enlarged area B1 surrounded by a dash-dot line illustrated in  FIG. 11  and is a view seen through from a second main surface  2 B side of the base  2 .  FIG. 13  is a cross-sectional view taken along the line V-V illustrated in  FIG. 12 . In addition, in  FIGS. 11 to 13 , configurations having the same functions as those in  FIGS. 2 ,  5 , and  6  are denoted with the same reference signs and a detailed description thereof will be omitted. 
     The input device X2 further includes a second conductive layer  21 , as illustrated in  FIGS. 11 to 13 . The second conductive layer  21  is provided on a covering layer  15   b  of a wiring board  15 . In addition, a portion of the second conductive layer  21  is located between detection wires  8  and control wires  15   a . Therefore, it is possible to reduce a possibility of electrical noise from the control wires  15   a  being picked up by the detection wires  8 , for example, even when an alternate current voltage is applied to a vibration body  13  via the control wires  15   a.    
     In addition, in the input device X2, the second conductive layer  21  is provided on the entire surface of the covering layer  15   b  facing the detection wires  8 . Therefore, it is possible to further reduce a possibility of electrical noise from the control wires  15   a  being picked up by the detection wires  8 . In addition, in the input device X2, it is preferable for the second conductive layer  21  to be set to a ground potential. When the second conductive layer  21  is set to the ground potential, the potential of the second conductive layer  21  does not substantially change even when an alternate current voltage is applied to the vibration body  13  via the control wires  15   a . Therefore, it is possible to further reduce a possibility of electrical noise from the control wires  15   a  being picked up by the detection wires  8 . 
     In addition, a constituent material of the second conductive layer  21  may include, for example, silver paste. 
     Embodiment 3 
       FIG. 14  is a plan view illustrating a schematic configuration of an input device X3 according to Embodiment 3 and is a view seen through a base  2 .  FIG. 15  is a plan view of an enlarged area C1 surrounded by a dash-dot line illustrated in  FIG. 14  and is a view seen through from a second main surface  2 B side of the base  2 . In addition, in  FIGS. 14 and 15 , configurations having the same functions as those in  FIGS. 2 and 5  are denoted with the same reference signs and a detailed description thereof will be omitted. 
     The input device X3 includes detection wires  31  in place of the detection wires  8  included in the input device X1, as illustrated in  FIGS. 14 and 15 . The detection wires  31  are located on a first protective layer  7 . In addition, ends of the detection wires  8  are electrically connected to connection wires  9 , and the other ends of the detection wires  8  are located in an external conduction area G1. Here, the detection wires  8  do not overlap control wires  15   a  when viewed in plan. Therefore, a spacing distance between the detection wires  31  and the control wires  15   a  can relatively increase. Therefore, it is possible to reduce a possibility of electrical noise from the control wires  15   a  being picked up by the detection wires  8 , for example, even when an alternate current voltage is applied to the vibration body  13  via the control wires  15   a.    
     Embodiment 4 
       FIG. 16  is a plan view illustrating a schematic configuration of an input device X4 according to Embodiment 4 and is a view seen through a base  2 .  FIG. 17  is a plan view of an enlarged area D1 surrounded by a dash-dot line illustrated in  FIG. 16  and is a view seen through from a second main surface  2 B side of the base  2 .  FIG. 18  is a cross-sectional view taken along the line VI-VI illustrated in  FIG. 17 . In addition, in  FIGS. 16 to 18 , configurations having the same functions as those in  FIGS. 2 ,  5 , and  6  are denoted with the same reference signs and a detailed description thereof will be omitted. 
     The input device X4 further includes ground wires  41 , as illustrated in  FIGS. 16 to 18 . The ground wires  41  are provided on the second main surface  2 B of the base  2  corresponding to the non-input area E2 and are located on the end surface  2 C side of the base  2  relative to the detection wires  8 . Specifically, the ground wires  41  are provided on a first protective layer  7  corresponding to a non-input area E2 and located to surround detection wires  8  along the periphery of the base  2 . Therefore, for example, when the input device X4 is incorporated into a display device, it is possible to remove electrical noise generated from the display device or from electronic parts or the like located around the input device X4, using the ground wires  41 . Therefore, it is possible to further reduce a possibility of detection sensitivity of the input device X4 being degraded due to electrical noise being picked up by the detection wires  8 . Here, in this disclosure, “to surround the detection wires  8 ” has a meaning including the fact that the detection wires  8  need not be completely surrounded by the ground wires  41  and, for example, the detection wires  8  may be surrounded by the ground wires  41  and an external conduction area G1. A constituent material of the ground wires  41  and a method of forming the ground wires  41  are the same as those of the detection wires  8 . 
     In addition, the input device X4 includes an insulating layer  42  in place of the insulating layer  10  included in the input device X1. The insulating layer  42  is provided on the first protective layer  7  corresponding to the non-input area E2, and the detection wires  8  are covered with the insulating layer  42 . The insulating layer  42  includes openings  42   a  between the detection wires  8  and a first conductive layer  11 . Conductive members  43  are buried in the openings  42   a . In addition, the first conductive layer  11  is electrically connected to the ground wires  41  through the conductive members  43 . Therefore, it is possible to reduce a resistance value of the first conductive layer  11  while setting the first conductive layer  11  to a ground potential. Therefore, it is possible to further reduce a possibility of electrical noise from the vibration body  13  being picked up by the detection wires  8 . In addition, in the input device X4, the conductive members  43  is provided in two places, but the invention is not limited thereto and the conductive members  43  may be provided in several places. In addition, the conductive members  43  may be formed integrally with the detection wires  8 . A constituent material of the conductive members  43  may include, for example, solder, silver paste, or the same constituent material as that of the detection wires  8 . 
     Embodiment 5 
       FIG. 19  is a plan view illustrating a schematic configuration of an input device X5 according to Embodiment 5 and is a view seen through a base  2 .  FIG. 20  is a plan view of an enlarged area E1 surrounded by a dash-dot line illustrated in  FIG. 19  and is a view seen through from a second main surface  2 B side of the base  2 .  FIG. 21  is a cross-sectional view taken along the line VII-VII illustrated in  FIG. 20 . In addition, in  FIGS. 19 to 21 , configurations having the same function as those in  FIGS. 2 ,  5 , and  6  are denoted with the same reference signs and a detailed description thereof will be omitted. 
     The input device X5 includes a vibration body  51  in place of the vibration body  13  included in the input device X1, as illustrated in  FIGS. 19 to 21 . In the vibration body  51 , a plurality of first electrode layers  51   a  and a plurality of second electrode layers  51   b  are laminated alternately via a plurality of piezoelectric layers  51   c . In addition, the first electrode layers  51   a  are electrically connected to a first surface electrode  51   d , and the second electrode layers  51   b  are electrically connected to a second surface electrode  51   e . The plurality of first electrode layers  51   a  are set to a ground potential via the first surface electrode  51   d  and control wires  15   a  of a wiring board  15 . 
     Here, the electrode layer located on the side nearest to detection wires  8  among the plurality of first electrode layers  51   a  and the plurality of second electrode layers  51   b  is the first electrode layer  51   a . Therefore, for example, even when an alternate current voltage is applied to the vibration body  51 , it is possible to further reduce a possibility of electrical noise from the vibration body  51  being picked up by the detection wires  8 . In addition, the surface electrode located on the side nearest to a first detection electrode pattern  3  and a second detection electrode pattern  4  among the first surface electrode  51   d  and the second surface electrode  51   e  is the first surface electrode  51   d . Therefore, for example, even when an alternate current voltage is applied to the vibration body  51 , it is possible to reduce a possibility of electrical noise from the vibration body  51  being picked up by the first detection electrode pattern  3  and the second detection electrode pattern  4 . 
     Embodiment 6 
       FIG. 22  is a plan view illustrating a schematic configuration of an input device X6 according to Embodiment 6 and is a view seen through a base  2 .  FIG. 23  is a cross-sectional view taken along the line VIII-VIII illustrated in  FIG. 22 . In addition, in  FIGS. 22 and 23 , configurations having the same functions as those in  FIGS. 2 and 18  are denoted with the same reference signs and a detailed description thereof will be omitted. 
     The input device X6 further includes auxiliary wires  61 , as illustrated in  FIGS. 22 and 23 . A plurality of auxiliary wires  61  are located on a first protective layer  7 . The auxiliary wires  61  are electrically connected to a second detection electrode pattern  4 . Specifically, ends of the auxiliary wires  61  are located on the side opposite to detection wires  8  with the second detection electrode pattern  4  sandwiched therebetween, and are electrically connected to the second detection electrode pattern  4 . In addition, the other ends of the auxiliary wires  61  are located in an external conduction area G1. Here, since the second detection electrode pattern  4  is longer than the first detection electrode pattern  3 , there is a possibility of increase in wiring resistance. In Embodiment 6, since the second detection electrode pattern  4  is electrically connected to the detection electrodes  8  and the auxiliary wires  61 , it is possible to reduce a possibility of increase in wiring resistance. The auxiliary wires  61  overlaps a vibration body  15  located along a short side on the upper side of the base  2 , when viewed in plan. 
     Here, the input device X6 includes a first conductive layer  61  in place of the first conductive layer  11  included in the input device X1. The first conductive layer  61  is provided on the insulating layer  10 . The first conductive layer  61  is located over the entire non-input area E2 other than the external conduction area G1. Therefore, the first conductive layer is located between the auxiliary wires  61  and the vibration body  15  located along the short side on the upper side of the base  2 . Therefore, in the input device X6, it is possible to reduce a possibility of electrical noise generated by the vibration body  15  being picked up by the auxiliary wires  61 . 
     In addition, the first conductive layer  61  overlaps the detection wires  8  in an area other than the area in which the vibration body  15  is located, when viewed in plan. Therefore, it is possible to reduce a possibility of electrical noise generated from the display panel  300  being picked up by the detection wires  8 , for example, when the input device X6 is incorporated in the display device Y1 in place of the input device X1. 
     Embodiment 7 
     In addition, while Embodiments 1 to 6 described above have been individually described in detail in this disclosure, the invention is not limited thereto and the example in which matters described individually in Embodiments 1 to 6 described above are combined appropriately has been also described. In other words, the input device according to the present invention is not limited to the input devices X1 to X6 and includes an input device in which the matters individually described in Embodiments 1 to 6 described above are appropriately combined. 
     In addition, while the display device Y1 including the input device X1 has been described in the present embodiment, the invention is not limited thereto and the input devices X2 to X6 may be adopted in place of the input device X1. 
     Embodiment 8 
     Further, while the example in which the input device is applied to the tactile feedback technology has been described in Embodiments 1 to 7 described above, the present invention is not limited thereto. For example, the present invention is also applicable to a speaker technology for outputting a voice by vibrating the base so as to be bent or a bone conduction technology capable of recognizing a voice through bone conduction, in addition to the tactile feedback technology. In addition, in this disclosure, the “bone conduction technology” has a meaning also including a cartilage conduction technology. Here, the “cartilage conduction” means transmission of vibration at a frequency corresponding to a voice signal to the cartilage of the outer ear and stimulation of the inner ear via its inner bone to transmit the signal to the auditory nerve. 
     REFERENCE SIGNS LIST 
     
         
         
           
             X1-X6 INPUT DEVICE 
             Y1 DISPLAY DEVICE 
             Z1 PORTABLE TERMINAL (ELECTRONIC DEVICE) 
               2  BASE 
               2 C END SURFACE OF BASE 
               3   a  FIRST DETECTION ELECTRODES 
               4   a  SECOND DETECTION ELECTRODES 
               8 ,  31  DETECTION WIRES 
               10 ,  42  INSULATING LAYER 
               11 ,  62  FIRST CONDUCTIVE LAYER 
               12  SECOND PROTECTIVE LAYER 
               13 ,  51  VIBRATION BODY 
               13   a ,  51   a  FIRST ELECTRODE LAYER 
               13   b ,  51   b  SECOND ELECTRODE LAYER 
               13   c ,  51   c  PIEZOELECTRIC LAYER 
               15  WIRING BOARD 
               15   a  CONTROL WIRES 
               15   b  COVERING LAYER 
               21  SECOND CONDUCTIVE LAYER 
               41  GROUND WIRES 
               61  AUXILIARY WIRES 
               100  FIRST HOUSING (HOUSING) 
               300  DISPLAY PANEL