Patent Publication Number: US-2022221956-A1

Title: Display device

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 16/918,404, filed on Jul. 1, 2020, which application is a continuation of U.S. patent application Ser. No. 15/858,380, filed on Dec. 29, 2017, and issued as U.S. Pat. No. 10,739,903 on Aug. 11, 2020, which application is a continuation of U.S. patent application Ser. No. 15/265,383, filed on Sep. 14, 2016, and issued as U.S. Pat. No. 9,933,892 on Apr. 3, 2018, which application is a continuation of U.S. patent application Ser. No. 13/954,452, filed on Jul. 30, 2013, and issued as U.S. Pat. No. 9,507,196 on Nov. 29, 2016, which application claims priority to Japanese Priority Patent Application JP 2012-170807 filed in the Japan Patent Office on Aug. 1, 2012, the entire content of which is hereby incorporated by reference. 
    
    
     BACKGROUND 
     The present invention relates to a display device with an input device and a method of manufacturing the same. More particularly, the present invention relates to a display device with an input device of an electrostatic capacitive type and a method of manufacturing the same. 
     In recent years, a technique has been proposed in which an input device referred to as a touch panel (touch sensor) is attached to a display surface side of a display device so as to detect and output contact position data thereon when a finger or others is in contact with the touch panel. Moreover, another technique has also been proposed in which a part of an electrode for detecting the contact position on the touch panel and a part of a display electrode of the display device are shared to be used in order to make a display device with a touch panel thinner (for example, Japanese Patent Application Laid-Open Publication No. 2009-244958 (Patent Document 1)). 
     SUMMARY 
     However, according to the study by the inventors of the present application, it is found that the display device with the input device has the following problems. 
     For example, in the case that a part of the electrode for detecting the contact position on the touch panel and a part of the display electrode for the display device are shared to be used, a configuration in which the electrode for the input device is formed on a substrate on a display surface side of the display device is considered. However, in this case, when the electrode for the input device is formed, the substrate and a display functional layer (for example, liquid crystal layer) in the display device are integrally formed, and therefore, a heating process at a high temperature cannot be applied thereto in a process for forming the electrode for the input device. Since a high visible light transparency is required for an electrode to be formed on the display surface side of the display device, an electrode material referred to as a so-called transparent electrode is used. When this transparent electrode is formed in a low-temperature process, increase in a resistance value and reduction in a visible light transmittance are caused. 
     Moreover, for example, in a case that an electrode for detecting an input position of an electrostatic capacitive type is formed on a substrate of the display device, the electrostatic capacity is varied depending on a thickness of the display device. Therefore, by making the display device thinner, a distance between the electrodes for detecting the input positions is shorter. In this case, the electrostatic capacity between the electrodes is higher, and therefore, reduction in detection sensitivity of the input position is caused. 
     Further, in the display device with the input device, a circuit for controlling the input device and a circuit for controlling the display device are required, and therefore, a wiring substrate on which the circuit for the input device is formed and a wiring substrate on which the circuit for the display device is formed are embedded therein, and a configuration of the device as a whole is complicated. 
     The present invention has been made in consideration of the above-described problems, and a preferred aim thereof is to provide a technique for improving reliability of a display device with an input device. 
     Also, another preferred aim thereof is to provide a technique for simplifying a structure of a wiring substrate to be connected to the display device with the input device. 
     In a display device with an input device according to the present invention, a plurality of input position detection electrodes which form an electrostatic capacity in a space with a common electrode of the display device so as to detect an input position are formed on a surface of a different substrate from a substrate forming the display device, the surface facing the display device. Moreover, the plurality of input position detection electrodes are fixed so as to be separated apart from the display device. 
     Moreover, in another display device with an input device according to the present invention, an input position detection circuit to be electrically connected to a plurality of input position detection electrodes formed on a different substrate from a substrate forming the display device is electrically connected to a connection terminal formed on the substrate forming the display device via a conductive member. 
     According to the above-described display device with the input device according to the present invention, the plurality of input position detection electrodes can be manufactured separately from the display device, and therefore, reduction in the reliability due to the increase in the resistance value or the reduction in the visible light transmittance can be suppressed. Moreover, since the plurality of input position detection electrodes are fixed so as to be separated apart from the display device, the distance between the electrodes for detecting the input position can be set separately from the thickness of the display device, and the reduction in detection sensitivity (detection reliability) of the input position due to the increase in electrostatic capacity can be suppressed. Moreover, since the plurality of input position detection electrodes are formed on a surface of the different substrate which faces the display device, the plurality of input position detection electrodes can be protected. 
     Further, according to the above-described another display device with the input device according to the present invention, since the circuit for the input device and the circuit for the display device can be formed on a common wiring substrate, the structure of the wiring substrate connected to the display device with the input device can be simplified. 
     Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the figures. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is an explanatory diagram illustrating an outline configuration of a touch panel (input device) of an electrostatic capacitive type; 
         FIG. 2  is an explanatory diagram illustrating an example of a relation between a driving waveform applied to the touch panel illustrated in  FIG. 1  and a signal waveform outputted from the touch panel; 
         FIG. 3  is an explanatory diagram schematically illustrating an example of an arrangement of driving electrodes and detection electrodes illustrated in  FIG. 1 ; 
         FIG. 4  is an explanatory diagram illustrating a modification example of  FIG. 3 ; 
         FIG. 5  is a cross-sectional diagram of a principal part illustrating a basic configuration of an example of a liquid crystal display device; 
         FIG. 6  is a cross-sectional diagram of a principal part illustrating a basic configuration of an example of a display device with an input device; 
         FIG. 7  is a cross-sectional diagram of a principal part illustrating an example of another display device with an input device of  FIG. 6 ; 
         FIG. 8  is a plan diagram schematically illustrating an example of a layout of a conductor pattern formed on a touch detection base member  20  illustrated in  FIG. 6 ; 
         FIG. 9  is a cross-sectional diagram of a principal part illustrating a modification example of  FIG. 6 ; 
         FIG. 10  is a cross-sectional diagram of a principal part illustrating a modification example of  FIG. 9 ; 
         FIG. 11  is a cross-sectional diagram of a principal part illustrating another modification example of  FIG. 9 ; 
         FIGS. 12A and 12B  are explanatory diagrams illustrating results evaluated by the inventors of the present application on a thickness of an adhesive layer for adhesively fixing the touch detection base member and the display device to each other in the display device with the input device illustrated in  FIG. 6 ; 
         FIG. 13  is an enlarged cross-sectional diagram illustrating an enlarged adhesion interface between the touch detection base member and the display device illustrated in  FIG. 6 ; 
         FIG. 14  is an explanatory diagram illustrating results of evaluation on a relation between visibility and refractive index of a spacer member illustrated in  FIG. 13 ; 
         FIG. 15  is an assembly flow diagram illustrating an outline of manufacturing processes of the display device with the input device illustrated in  FIG. 6 ; 
         FIG. 16  is an enlarged cross-sectional diagram illustrating a modification example of  FIG. 6 ; 
         FIG. 17  is an explanatory diagram schematically illustrating an example of a wiring layout in a plan view of a wiring substrate illustrated in  FIG. 16 ; 
         FIG. 18  is an enlarged cross-sectional diagram of a principal part of a first modification example of a connecting portion illustrated in  FIG. 16 ; 
         FIG. 19  is an enlarged cross-sectional diagram of a principal part of a second modification example of the connecting portion illustrated in  FIG. 16 ; 
         FIG. 20  is an enlarged cross-sectional diagram of a principal part of a third modification example of the connecting portion illustrated in  FIG. 16 ; 
         FIG. 21  is a cross-sectional diagram of a principal part illustrating a modification example of  FIG. 6 ; and 
         FIG. 22  is a cross-sectional diagram of a principal part illustrating another modification example of  FIG. 16 . 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings. The components having the same or similar function are denoted by the same or similar reference symbols throughout all drawings for describing the following embodiments, and the repetitive description thereof will be omitted in principle. Also, in the following embodiments, explanations of an example of the display device will be made by exemplifying a liquid crystal display device using a liquid crystal layer as a display functional layer forming a display image by applying a display voltage between display electrodes. 
     Note that  FIGS. 5, 6, 7, 9, 10, 11, 16, 21 and 22  explained in the following embodiments are cross-sectional diagrams. However, in order to easily see, hatching is omitted therein in principle. Moreover, in each cross-sectional diagram, liquid crystals LC forming a liquid crystal layer  16  are schematically illustrated by elliptical shapes. Further, in the above-described each cross-sectional diagram, a plurality of the same members are provided in some cases. However, in order to easily see, one of the plurality of members is denoted by a reference symbol, and the common hatching is added to the same members to be identified. 
     First Embodiment 
     &lt;Operating Principle of Input Device of Electrostatic Capacitive Type&gt; 
     First, a basic operating principle of an input device referred to as a touch panel (or a touch sensor) of an electrostatic capacitive type.  FIG. 1  is an explanatory diagram illustrating an outline configuration of the touch panel (or input device) of the electrostatic capacitive type. Moreover,  FIG. 2  is an explanatory diagram illustrating an example of a relation between a driving waveform applied to the touch panel illustrated in  FIG. 1  and a signal waveform outputted from the touch panel. Further,  FIG. 3  is an explanatory diagram schematically illustrating an example of an arrangement of a driving electrode and a detection electrode illustrated in  FIG. 1 , and  FIG. 4  is an explanatory diagram illustrating a modification example of  FIG. 3 . 
     A touch panel, or an input device, TP of an electrostatic capacitive type is provided with a dielectric layer DL and a plurality of capacitive elements C 1  formed of paired electrodes that are arranged to face each other through the dielectric layer DL. To a driving electrode Tx forming one of the paired electrodes, a driving waveform DW which is, for example, a rectangular wave illustrated in  FIG. 2  is applied from a driving circuit DR 1  for the input device. On the other hand, from a detection electrode, or an input position detection electrode, Rx forming the other of the paired electrodes, an electric current in accordance with, for example, the driving waveform DW illustrated in  FIG. 2  and a capacitance of the capacitive elements C 1  illustrated in  FIG. 1  is carried so as to output a signal waveform SW. The signal waveform SW outputted from the detection electrodes Rx is outputted to a detection circuit DT 1  (see  FIG. 1 ) for detecting an input position. 
     Here, as illustrated in  FIG. 1 , when an input tool CMD such as a finger or a touch pen serving as a capacitive element whose one end is connected to a ground potential is approached to the detection electrode Rx of the touch panel TP or is in contact therewith, a capacitance of the input tool CMD is added to the capacitive element Cl at a position close to the input tool CMD. Accordingly, a signal waveform SW 1  outputted from the detection electrode Rx arranged at a position close to the input tool CMD is smaller than a signal waveform SW 2  outputted from another detection electrode Rx arranged at a different position (for example, see  FIG. 2 ). Therefore, the detection circuit DT 1  can monitor each signal waveform SW transmitted from the plurality of detection electrodes Rx, and specify the position of the input tool CMD based on an amount of change in the signal waveform SW. For example, a threshold value is previously set to the amount of change of the signal waveform SW, so that the position of the input tool CMD can be outputted in reference to positional data of the detection electrode Rx having a value exceeding the threshold value. Moreover, for example, the value of the signal waveform SW can be also directly compared with the threshold value. 
     Note that the phenomenon in which the capacitance of the input tool CMD is added to the capacitive element Cl is seen not only when the input tool CMD and the detection electrode Rx are in contact with each other but also when the input tool CMD and the detection electrode Rx are approached to each other. Therefore, it is not required to expose the detection electrode Rx to a surface on which the input tool CMD is arranged. For example, a cover member can be arranged between the detection electrode Rx and the input tool CMD so that the detection electrode Rx is protected. 
     Also, as a method of monitoring the amount of change in the signal waveform SW, there are various modification examples. For example, a method of measuring a voltage value generated in the detection electrode Rx or a method of measuring an accumulated amount of a current value per unit time flowing through the detection circuit DT 1  can be used. 
     Moreover, various modes can be also applied to a planar layout of each of the driving electrodes Tx and the detection electrodes Rx. For example, as illustrated in  FIG. 3 , the driving electrode Tx can be arranged as a solid pattern, and the detection electrode Rx can be arranged as a column/row pattern (or a matrix pattern). Alternatively, as illustrated in  FIG. 4 , the driving electrode Tx and the detection electrode Rx can be arranged as strips so as to intersect with each other (preferably, so as to be orthogonal to each other). In this case, a driving waveform DW (see  FIG. 2 ) is sequentially applied to the plurality of driving electrodes Tx, and an amount of change in the signal waveform SW (see  FIG. 2 ) is determined for each of the intersections between the driving electrodes Tx and the detection electrodes Rx in a plan view. Moreover, although illustration is omitted, the mode illustrated in  FIG. 3  and the mode illustrated in  FIG. 4  can be combined with each other to be applied. 
     &lt;Basic Configuration of Display Device&gt; 
     Next, a basic configuration of the display device will be explained.  FIG. 5  is a cross-sectional diagram of a principal part illustrating a basic configuration of one example of a liquid crystal display device. 
     The liquid crystal display device is roughly categorized into the following two depending on an applying direction of electric field for changing orientations of liquid crystal molecules of a liquid crystal layer serving as a display functional layer. That is, the first category is exemplified as a so-called vertical electric field mode in which the electric field is applied in a thickness direction (or in an out-of-plane direction) of the liquid crystal display device. The vertical electric field mode is exemplified as, for example, a TN (Twisted Nematic) mode, a VA (Vertical Alignment) mode, and others. Also, the second category is exemplified as a so-called horizontal electric field mode in which the electric field is applied in a planar direction (or in an in-plane direction) of the liquid crystal display device. The horizontal electric field mode is exemplified as, for example, an IPS (In-Plane Switching) mode, an FFS (Fringe Field Switching) mode, and others. A technique to be explained below can be applied to both of the vertical electric field mode and the horizontal electric field mode. However, as one example,  FIG. 5  illustrates a display device of the horizontal electric field mode (more specifically, the FFS mode). 
     A display device LCD 1  illustrated in  FIG. 5  is provided with: a substrate  11  having a front surface (or a surface)  1  la arranged on a display surface side (or a viewer VW side); and a substrate  12  arranged on an opposite side to the front surface  11   a  of the substrate  11  so as to be separated apart from the substrate  11 . Moreover, the display device LCD 1  is provided with: a plurality of pixel electrodes  13  arranged between the substrate  11  and the substrate  12 ; and a common electrode  14  arranged between the substrate  11  and the substrate  12 . Further, the display device LCD 1  is further provided with a liquid crystal layer  16  which is arranged between the substrate  11  and the substrate  12  and which is a display functional layer forming a display image by applying a displaying voltage between the plurality of pixel electrodes  13  and the common electrode  14 . 
     The substrate  11  is a color filter substrate on which a color filter (whose illustration is omitted) for forming a color displayed image is formed, and is provided with: a front surface  11   a  to be the display surface side; and a back surface (or a surface, rear surface, or inner surface)  11   b  positioned on an opposite side to the front surface  11   a.  The substrate  11  is formed by pasting a color filter onto one surface of a base member such as a glass substrate, the color filter being formed by periodically arranging color filter layers with three colors of red (R), green (G), and blue (B). In the color display device, one pixel (or one picture element) is formed by, for example, grouping sub-pixels of the three colors of red (R), green (G), and blue (B) as one set. 
     Moreover, the substrate (or array substrate)  12  is a circuit substrate on which an image displaying circuit is mainly formed, and is provided with: a front surface (or a surface or inner surface)  12   a  positioned on the substrate  11  side; and a back surface (or a surface or rear surface)  12   b  positioned on an opposite side thereto. On the front surface  12   a  side of the substrate  12 , an active element such as a TFT (Thin-Film Transistor) and a plurality of pixel electrodes  13  are formed in a matrix pattern (or an array pattern). Moreover, in the example illustrated in  FIG. 5 , the display device LCD 1  in the horizontal electric field mode (more specifically, the FFS mode) as described above is illustrated, and therefore, the common electrode  14  is also formed on the front surface  12   a  side of the substrate  12 . The common electrode  14  is formed on the front surface  12   a  of the substrate  12 , and an insulating layer  15  is stacked on the common electrode  14 . Moreover, the plurality of pixel electrodes  13  are formed on the insulating layer  15  so as to face the common electrode  14  via the insulating layer  15 . In the display device LCD 1 , during a display period, a pixel voltage is applied to the pixel electrode  13 , and a common driving signal is applied to the common electrode  14 , so that a display voltage of each pixel is defined. 
     Also, on the substrate  12 , a display driver for driving the pixel electrodes  13  and wires such as a source line for supplying the pixel signal to the pixel electrode  13  and a gate line for driving the TFT are formed in addition to the above-described members although illustrations are omitted. 
     Moreover, between the substrate  11  and the substrate  12 , a liquid crystal layer  16  which is the display functional layer for forming the display image by applying the displaying voltage between the pixel electrode  13  and the common electrode  1  is provided. The liquid crystal layer  16  converts light passing therethrough in accordance with a state of the applied electric field, and, for example, liquid crystals LC corresponding to various types of modes such as TN, VA, and FFS are used. Note that an orientation film is formed between the liquid crystal layer  16  and each of the substrates  11  and  12  although illustrations are omitted. 
     Moreover, on the back surface  12   b  side of the substrate  12  of the display device LCD 1 , a light source LS and a polarizing plate PL 1  for filtering light generated from the light source LC are provided. On the other hand, on the front surface  11   a  side of the substrate  11 , a polarizing plate PL 2  for filtering light passing through the substrate  11  is provided. 
     Moreover, in the example illustrated in  FIG. 5 , onto the front surface  12   a  of the substrate  12 , a semiconductor chip (or a driver chip)  17  on which a driving circuit for supplying a driving potential to the pixel electrode  13  and a wiring substrate  18  electrically connected a driving circuit DR 2  for the image display are electrically connected. The wiring substrate  18  is, for example, a so-called flexible wiring board in which a plurality of wires are formed inside a resin film and which can be freely deformed in accordance with a shape of a layout position. Wires formed in the wiring substrate  18  include a wire  18   a  electrically connected to the pixel electrode  13  and a wire  18 b electrically connected to the common electrode  14 . Note that, as the example illustrated in  FIG. 5 , an aspect of a so-called COG (Chip on glass) mode in which a semiconductor chip is mounted on the substrate  12  is exemplified. However, a place on which the semiconductor chip is mounted is not limited to a place on the substrate  12 , and, for example, another mode in which it is mounted on the wiring substrate  18  can be applied. 
     A method of displaying color images by the use of the display device LCD 1  illustrated in  FIG. 5  is, for example, as follows. That is, light emitted from the light source LS is filtered by the polarizing plate PL 1 , and light (or polarized light) having an amplitude that is allowed to pass through the polarizing plate PL 1  enters the liquid crystal layer  16 . The incident light into the liquid crystal layer  16  is propagated in a thickness direction of the liquid crystal layer  16  (or a direction from the substrate  12  toward the substrate  11 ) with its polarized state being changed in accordance with a refractive index anisotropy (or birefringence) of the liquid crystal LC, and is emitted from the substrate  11 . At this time, the liquid crystal orientation is controlled by the electric field formed by applying a voltage to the pixel electrode  13  and the common electrode  14  so that the liquid crystal layer  16  is functioned as an optical shutter. That is, in the liquid crystal layer  16 , optical transmittance can be controlled for each of the sub-pixels. The light having reached the substrate  11  is subjected to a color filtering process (or a process for absorbing light having wavelengths except for a predetermined wavelength) in the color filter formed in the substrate  11 , and is emitted from the front surface  11   a.  Moreover, the light released from the front surface  11   a  is filtered by the polarizing plate PL 2 , and reaches the viewer VW. 
     &lt;Configuration of Display Device with Input Device&gt; 
     Next, a configuration of a display device with an input device obtained by combining a function of the above-described input device with a function of a display device will be explained.  FIG. 6  is a cross-sectional diagram of a principal part illustrating a basic configuration of an example of a display device with an input device. Also,  FIG. 7  is a cross-sectional diagram of a principal part illustrating an example of another display device with an input device of  FIG. 6 . Further,  FIG. 8  is a plan diagram schematically illustrating an example of a layout of a conductor pattern formed on a touch detection base member  20  illustrated in  FIG. 6 . 
     To a display device LCD 2  with an input device illustrated in  FIG. 6  on the substrate  11  side of the display device LCD 1  explained with reference to  FIG. 5 , a touch detection base member  20  formed of a substrate  21  onto which a detection electrode (or an input position detection electrode) Rx is attached is attached. 
     The substrate  21  is provided with: a front surface (or a surface)  21   a  arranged on a display surface side (or a viewer VW side); and a back surface (or a surface or rear surface)  21   b  positioned on an opposite side to the front surface  21 a, and the plurality of detection electrodes Rx explained with reference to  FIG. 1  are formed in the back surface  21 b. A wiring substrate  23  is connected to the detection electrodes Rx, and is electrically connected via the wiring substrate  23  to the detection circuit DT 1  for detecting the input position. The wiring substrate  23  is, for example, a so-called flexible wiring board in which a plurality of wires are formed inside a resin film and which can be freely deformed in accordance with a shape of a layout position. Wires formed in the wiring substrate  23  include a wire  23 a which is electrically connected to the plurality of detection electrodes Rx and which transmits a detection signal to the detection circuit DT 1 . 
     Moreover, in the touch detection base member  20 , the driving electrode Tx as explained with reference to  FIG. 1  is not formed. In the display device LCD 2  with the input device, as illustrated in  FIG. 6 , the driving waveform DW for detecting the input position explained with reference to  FIG. 2  is applied to the common electrode  14  of the display device LCD 1 . To the common electrode  14 , the driving waveform DW (see  FIG. 2 ) can be applied via, for example, the wiring substrate  18  illustrated in  FIG. 6 . The common electrode  14  is electrically connected to the driving circuit DR 1  via the wiring substrate  18 . 
     In a different expression of such a configuration as applying the driving waveform DW for detecting the input position to the common electrode  14  as described above, the common electrode  14  in the display device LCD 2  with the input device is designed as an electrode in combination of a function serving as the common electrode  14  for the display device LCD 1  and a function serving as the driving electrode Tx for the input device. As method of combining the common electrode  14  and the driving electrode Tx for use, the method can be achieved by, for example, dividing a certain period (or one period) into a touch detection period (or an input period) and a display writing period. In this manner, by combining the common electrode  14  for the display device LCD 1  and the driving electrode Tx for the input device, a total thickness of the display device LCD 2  with the input device can be reduced. 
     Here, when the common electrode  14  and the driving electrode Tx are combined with each other for use, such as aspect that the detection electrode Rx is directly formed on the front surface  11   a  of the substrate  11  as a display device LCD 3  with an input device illustrated in  FIG. 7  is considered. In other words, in the display device LCD 3  with the input device illustrated in  FIG. 7 , the detection electrode Rx is formed between the polarizing plate PL 2  on the display surface side and the substrate  11  with the color filter formed thereon. Further, in other words, in the display device LCD 3  with the input device, the detection electrode Rx and the driving electrode Tx serving as the input device are formed between the polarizing plates PL 1  and PL 2  that are arranged so as to face each other, that is, inside the display device LCD 1 . By forming the detection electrodes Rx and the driving electrode Tx serving as the input device inside the display device as described above, the thickness of the display device with the input device can be the thinnest. 
     However, according to the study by the inventors of the present application, the following problems have found when the detection electrode Rx is formed on the substrate  11  forming the display device LCD 1  such as the display device LCD 3  with the input device illustrated in  FIG. 7 . That is, when the detection electrode Rx is formed on the substrate  11 , the detection electrode Rx is formed thereon in a state that the liquid crystal layer  16  is formed between the substrate  11  and the substrate  12 . Therefore, in a process for forming the detection electrode Rx, application of such a high temperature as exceeding 100° C. causes deterioration of the liquid crystals LC. On the other hand, since the detection electrode Rx is an electrode formed closer to the display surface side than the liquid crystal layer  16  serving as the display functional layer, this is made of an electrode material referred to as a transparent electrode material. As the transparent electrode material, for example, ITO (Indium-tin-oxide), zinc oxide, and others can be exemplified. In these transparent electrode materials, by applying a temperature of, for example, 200° C. or higher upon forming an electrode, a resistance value can be reduced, or the visible light transmittance can be improved. That is, if the applied temperature is low (for example, about 25° C. to 100° C.) upon forming the detection electrode Rx, there are problems that the resistance value of the detection electrodes Rx is increased or the visible light transmittance is lowered. 
     Moreover, in the case of the input device of the electrostatic capacitive type in which the driving electrode Tx and the detection electrode Rx are arranged so as to face each other via the dielectric layer DL as illustrated in the above-described  FIG. 1 , when the electrostatic capacity between the electrodes increases, a shape sharpness of the signal waveform SW illustrated in  FIG. 2  is moderated (or changing quantity thereof is reduced). That is, when the thickness of the dielectric layer DL arranged between the driving electrode Tx and the detection electrodes Rx that are arranged so as to face each other is thinner, the electrostatic capacity of the capacitive element C 1  increases, and the detection sensitivity of the input position is reduced. When this fact is applied to the display device LCD 3  with the input device illustrated in  FIG. 7 , the electrostatic capacity between the detection electrode Rx and the driving electrode Tx is defined mainly by the thickness of the substrate  11  and the distance between the electrodes facing each other in the display device LCD 3  with the input device. Therefore, the electrostatic capacity between the driving electrode Tx and the detection electrode Rx that are arranged so as to face each other is increased due to the thinning of the substrate  11 , and this causes the reduction in the detection sensitivity of the input position. 
     Moreover, when the distance between the polarizing plate PL 2  and the detection electrodes Rx is shorter, there is a concern of corrosion of the detection electrode Rx due to influence of acid or others generated from the polarizing plate PL 2 . Therefore, from a viewpoint of suppressing the reduction in the detection reliability of the input position due to the corrosion of the detection electrode Rx, it is preferred to provide a barrier layer for preventing or suppressing transportation of the acid generated from the polarizing plate PL 2  between the polarizing plate PL 2  and the detection electrode Rx. 
     Moreover, when electrodes are formed on the substrate  11  serving as the color filter substrate of the display device LCD 1 , a risk of damaging the substrate  11  is increased in the electrode forming process. The partial damage of the color filter causes a display defect, and therefore, it is preferred that the electrodes are not directly formed on the substrate  11  from a viewpoint of improving the display reliability. 
     Further, when the detection electrode Rx is formed between the polarizing plate PL 2  and the substrate  11 , a manufacturing process for the input device is added in a manufacturing process for the display device LCD 1 , the number of the manufacturing processes for the display device LCD 1  increases. Therefore, from a viewpoint of improving a manufacturing efficiency of the display device LCD 1 , it is preferred to form the detection electrode Rx separately from the display device LCD 1 . 
     Accordingly, in the display device LCD 2  with the input device illustrated in  FIG. 6 , the detection electrode Rx for detecting the input position is formed on a substrate  21  different from that of the display device LCD 1 , and is fixed thereto so as to be separated apart from the front surface  11   a  of the substrate  11 . In the example illustrated in  FIG. 6 , a covering member for covering the display device LCD 1  is utilized as the substrate  21  on which the detection electrode Rx is formed. By forming the detection electrodes Rx on the substrate  21  serving as the covering member for covering the display device LCD 1 , increase in the number of the component members for the display device LCD 2  with the input device can be suppressed. Moreover, by forming the detection electrode Rx on the substrate  21  serving as the covering member for covering the display device LCD 1 , the total thickness of the display device LCD 2  with the input device can be thinned. 
     As illustrated in the display device LCD 2  with the input device, by forming the detection electrode Rx on the substrate  21  different from that of the display device LCD 1  to provide the touch detection base member  20  separately from the display device LCD 1 , the display device LCD 1  and the touch detection base member  20  are independently manufactured from each other, and then, can be built up later. As a result, when the detection electrode Rx is formed, such a high temperature as 200° C. or higher can be applied. That is, the resistance value of the detection electrode Rx can be reduced, and the detection reliability of the input position can be improved. Moreover, the visible light transmittance of the detection electrode Rx can be improved, and the display reliability can be improved. 
     Moreover, in the display device LCD 2  with the input device, by providing the touch detection base member  20  separately from the display device LCD 1 , the risk of causing the damage to the substrate  11  serving as the color filter substrate of the display device LCD 1  can be reduced. Further, in the display device LCD 2  with the input device, by providing the touch detection base member  20  separately from the display device LCD 1 , the manufacturing efficiency of the display device LCD 1  can be improved. 
     Moreover, in the display device LCD 2  with the input device, the touch detection base member  20  is provided separately from the display device LCD 1 , and the detection electrode Rx of the touch detection base member  20  is fixed so as to be separated apart from the front surface Ila of the substrate  11 . Therefore, a value of the electrostatic capacity between the detection electrode Rx and the driving electrode Tx can be adjusted by the distance (or separated distance) between the detection electrode Rx and the substrate  11 . Therefore, for example, even when the substrate  11  is thinned, the increase in the electrostatic capacity can be suppressed by increasing the distance Dl. 
     Moreover, an adhesive layer  22  illustrated in  FIG. 6  is thicker than an adhesive layer  19  for adhesively fixing the polarizing plate PL 2 , so that the distance D 1  is adjusted by the thickness of the adhesive layer  22 . When the adhesive layer  19  is thickened in order to adjust the value of the electrostatic capacity, the distance between the polarizing plate PL 2  and the substrate  11  serving as the color filter substrate is farther, and therefore, influence on the displayed image is large. In the example illustrated in  FIG. 6 , the distance D 1  is adjusted by the thickness of the adhesive layer  22 , and therefore, the thickness of the adhesive layer  19  can be maintained as small as possible. 
     As an aspect for securing the distance D 1  between the detection electrode Rx and the substrate  11 , various modification examples are cited in addition to the example illustrated in  FIG. 6 . For example, there is a method in which the substrate  21  is adhesively fixed to a frame-shaped spacer member arranged on a peripheral edge portion of the substrate  11  although not illustrated. In this case, the distance D 1  between the detection electrode Rx and the substrate  11  is defined by a height of the spacer member, so that a hollow space (such as an air layer) is arranged between the detection electrode Rx and the substrate  11 . 
     However, in this case, the substrate  11  is coupled via the spacer member to the substrate  21  serving as the covering member, and therefore, it is easy to transmit external force applied to the substrate  21  such as impact to the substrate  11  via the spacer member. Therefore, from a viewpoint of making the impact applied to the substrate  21  difficult to transmit to the substrate  11 , it is preferred to arrange the adhesive layer  22  between the substrate  11  (or the polarizing plate PL 2 ) and the substrate  21  (or the detection electrode Rx) and adhesively fix the substrate  21  thereto via the adhesive layer  22  as illustrated in  FIG. 6 . The adhesive layer  22  is made of, for example, a resin material having a lower elasticity than those of the substrate  21  and the substrate  11 . Moreover, the substrate  21  is fixed to the polarizing plate PL 2  (or the substrate  11 ) by adhesive force of the adhesive layer  22 , and therefore, no additional member such as a spacer member for fixing the substrate  11  and the substrate  21  is provided on the periphery of the adhesive layer. Therefore, for example, even when the external force is applied to the substrate  21 , the external force can be relaxed by the adhesive layer  22  so as to be difficult to transmit to the substrate  11 . 
     Moreover, as illustrated in  FIG. 6 , by arranging the adhesive layer  22  between the polarizing plate PL 2  and the detection electrode Rx and increasing the thickness of the adhesive layer  22 , the possibility of the corrosion of the detection electrode Rx due to the influence of the acid or others generated from the polarizing plate PL 2  can be reduced. The adhesive layer  22  illustrated in  FIG. 6  is thicker than the adhesive layer  19  for adhesively fixing the polarizing plate PL 2 , and has a thickness of, for example, 100 μm or thicker. By setting the distance between the polarizing plate PL 2  and the detection electrode Rx to 100 μm or thicker, the phenomenon of the corrosion of the detection electrode Rx can be effectively prevented. Note that an explanation will be made in detail later for a preferable range of the thickness of the adhesive layer  22  to be set from a viewpoint of improving the detection accuracy of the display device LCD 3  with the input device. 
     Moreover, in the display device LCD 2  with the input device, by providing the touch detection base member  20  separately from the display device LCD 1 , a metal wire can be formed on the substrate  21 . When a planar dimension of a display region of the display device with the input device is large, a size of the wiring substrate  23  can be reduced by, for example, forming a leader wire  24  on the substrate  21  on which the detection electrode Rx is formed and electrically connecting the wiring substrate  23  and the detection electrode Rx with each other via the leader wire  24  as illustrated in  FIG. 8 . Here, from a viewpoint of reducing influence of the leader wire  24  onto a signal to be transmitted to the wiring substrate  23 , it is preferred to form the leader wire  24  by using a metal material so as to reduce its impedance component. The touch detection base member  20  illustrated in  FIG. 8  is manufactured separately from the display device LCD 1  illustrated in  FIG. 6 , and therefore, for example, a metal-film forming technique such as a sputtering method can be applied when the leader wire  24  is formed. Therefore, the leader wire  24  can be made of the metal material so as to reduce its impedance component. Moreover, by forming the leader wire  24  by using the metal material, a wire width can be thinned, and therefore, a layout space for the leader wire  24  cane be reduced. Therefore, the total planar size of the display device LCD 2  with the input device (see  FIG. 6 ) can be reduced. 
     Moreover, from a viewpoint of improving processability of the detection electrode Rx, the substrate  21  is preferred to be a glass plate. Further, as the substrate  21 , it is particularly preferred to use a so-called reinforced glass which is subjected to a process for compressing a surface of a glass plate so as to improve fracture resistance. However, when the substrate  21  is the glass plate, a weight of the substrate  21  is increased, and therefore, the weight of the substrate  21  can be decreased by forming it by using a resin material. In this case, on the front surface  21   a  side to be externally exposed, it is preferred to provide a protective layer (or a hard coat layer that is subjected to a treatment for hardening it more than the back surface  21 b side) for protecting the substrate  21  from damages. 
     Moreover, in the display device LCD 2  with the input device illustrated in  FIG. 6 , only the adhesive layer  19 , the polarizing plate PL 2 , the adhesive layer  22  and the detection electrodes Rx are illustrated between the substrate  21  and the substrate  11  in order to easily illustrate the configuration in which the touch detection base member  20  separately from the display device LCD 1  is provided so as to be separated apart therefrom and also so as to face each other and show the resulting effect. However, it is not excluded that an additional member is arranged between the substrate  21  and the substrate  11 . For example, as illustrated in  FIG. 9 , a conductor layer (or charge relaxation layer)  25  can be provided between the substrate  21  and the substrate  11  as a charge relaxation layer for suppressing malfunction due to electro static discharge (ESD).  FIG. 9  is a cross-sectional diagram of a principal part illustrating a modification example of  FIG. 6 . 
     A display device LCD 4  with an input device illustrated in  FIG. 9  is different from the display device LCD 2  with the input device illustrated in  FIG. 6  in that the conductor layer  25  is provided between the substrate  21  and the substrate  11 . This is the same as the display device LCD 2  with the input device in other points, and therefore, overlapped explanations will be omitted. The conductor layer  25  provided in the display device LCD 4  with the input device functions as the charge relaxation layer provided for preventing or suppressing the malfunction of the display device LCD 1  due to the influence of the ESD. The static electricity is applied in some cases such as the manufacturing process for the display device LCD 1  and the usage of a completed product (for example, the display device LCD 4  with the input device) by a user. The application of the static electricity to the display device LCD 1  causes malfunction such as display disturbance. Therefore, when the static electricity is applied to the component member of the display device LCD 1 , it is preferred to take out the charge caused by the static electricity. 
     Accordingly, in the LCD 4  with the input device illustrated in  FIG. 9 , the conductor layer  25  is formed above the polarizing plate PL 2  so that the electrical charge charged in the display device LCD 1  is taken outside through the conductor layer  25 . The conductor layer  25  forms a passage through which the charge caused by the static electricity is taken outside, and therefore, is required to have the conductive property. However, even when a sheet resistance value of the conductor layer  25  is larger than a sheet resistance value of the detection electrode Rx, a sufficient effect as the charge relaxation layer is obtained. Also, when the resistance value of the conductor layer  25  is too low, this causes a reduction in the detection sensitivity of an input position by the detection electrodes Rx. This is because, in the case of the input device of the electrostatic capacitive type, it is difficult to detect the change in the electrostatic capacity when a conductive member having a low resistivity is arranged between capacitive elements because the conductive member functions as a shield. Therefore, it is preferred that the conductor layer  25  is made of a material having a sheet resistance value larger than that of the detection electrode Rx, such as a conductive resin layer obtained by mixing conductive particles with a resin material. Moreover, for example, a transparent conductive material such as ITO can be also used. In this case, it is preferred that the material has a sheet resistance value larger than that of the detection electrode Rx. The preferable sheet resistance value of the conductor layer  25  is, for example, about 10 7  Ω to 10 11  Ω. 
     Moreover, when the conductor layer  25  is adhesively fixed to the polarizing plate PL 2  via the adhesive layer  19  as the display device LCD 4  with the input device, the adhesive layer  22  is interposed between the conductor layer  25  and the detection electrode Rx. Therefore, if the adhesive layer  22  is made of an insulating material, the short-circuit of each of the plurality of detection electrodes Rx (see  FIG. 8 ) can be reliably prevented via the conductor layer  25 . In this case, the conductor layer  25  is formed on the polarizing plate PL 2 , and therefore, it is difficult to apply the high-temperature process to the process for forming the conductor layer  25 . However, as described above, since it is preferred that the sheet resistance value of the conductor layer  25  is larger than the sheet resistance value of the detection electrode Rx, it can be formed by using a low-temperature process. 
     Moreover, as described above, the conductor layer  25  functions as the charge relaxation layer even when it has the large sheet resistance value. Therefore, as a modification example of  FIG. 9 , for example, it may be not required that the conductor layer  25  and the detection electrode Rx are insulated from each other as illustrated in  FIGS. 10 and 11 .  FIG. 10  is a cross-sectional diagram of a principal part illustrating the modification example of  FIG. 9 , and  FIG. 11  is a cross-sectional diagram of a principal part illustrating another modification example of  FIG. 9 . 
     A display device LCDS with an input device illustrated in  FIG. 10  is different from the display device LCD 4  with the input device illustrated in  FIG. 9  in that the detection electrode Rx formed on the substrate  21  are in contact with the conductor layer  25 . Moreover, a display device LCD 6  with an input device illustrated in  FIG. 11  is different from the display device LCD 4  with the input device illustrated in  FIG. 9  in that, although the conductor layer  25  is not formed, conductive particles are mixed into an adhesive layer  22   a  for adhesively fixing the substrate  21  and the polarizing plate PL 2  to each other instead of the formation. In other words, in the display device LCD 6  with the input device illustrated in  FIG. 11 , the conductor layer is included in the adhesive layer  22 a. Therefore, the adhesive layer  22   a  has both of an adhesive function for adhesively fixing the touch detection base member  20  and the display device LCD 1  to each other and the function of the above-described charge relaxation layer. The other portions are the same as those of the display device LCD 4  with the input device, and therefore, overlapped explanations will be omitted. 
     When the detection electrode Rx and the conductor layer  25  are in contact with each other as the display device LCDS with the input device illustrated in  FIG. 10 , the efficiency for taking out the electrical charge charged in the conductor layer  25  from the detection electrode Rx is improved, and therefore, the ESD resistance can be further improved than that of the display device LCD 4  with the input device illustrated in  FIG. 9 . However, when the detection electrode Rx and the conductor layer  25  are in contact with each other, it is preferred that the detection electrode Rx and the conductor layer  25  are in contact with each other within a range, for example, in which the short circuit of each of the plurality of detection electrodes Rx illustrated in FIG. 8  is not caused via the conductor layer  25 . The erroneous detection due to the contact of the conductor layer  25  with the detection electrode Rx can be suppressed by setting the sheet resistance value of the conductor layer  25  sufficiently larger than the sheet resistance value of the detection electrodes Rx. However, from a viewpoint of more reliably preventing the erroneous detection, it is preferred that the conductor layer  25  is the conductive resin layer obtained by mixing the conductive particles with the resin material. Moreover, it is preferred that particle sizes of the conductive particles are smaller than the separated distance between the detection electrodes Rx adjacent to each other. 
     Moreover, when the detection electrode Rx and the conductor layer  25  are in contact with each other as the display device LCDS with the input device illustrated in  FIG. 10 , the conductor layer  25  can be formed in the manufacturing process for the touch detection base member  20 . Therefore, the degree of freedom of selecting the material of the conductor layer  25  is improved. For example, when a conductive resin paste obtained by mixing the conductive particles with a paste-like resin material is used for forming the conductor layer  25 , the paste can be applied onto the plurality of detection electrodes Rx formed on the back surface  21   b  of the substrate  21  illustrated in  FIG. 8 . In this case, the conductive resin paste is buried between the detection electrodes Rx adjacent to each other, and therefore, the electrostatic capacity of the capacitive element C 1  illustrated in  FIG. 1  can be stabilized. As a result, the detection accuracy of the input position is improved, and therefore, the detection reliability can be improved. Moreover, by reducing a space between the detection electrodes Rx adjacent to each other, display light can be stably transmitted. 
     Moreover, as the display device LCD 4  with the input device illustrated in  FIG. 9  and the display device LCDS with the input device illustrated in  FIG. 10 , when the conductor layer  25  is arranged between the polarizing plate PL 2  and the detection electrode Rx, it is preferred that the refractive index of the conductor layer  25  is set to a value between the refractive index of the detection electrode Rx and the refractive index of the adhesive layer  22  or the polarizing plate PL 2  for index matching. 
     Moreover, as the display device LCD 6  with the input device illustrated in  FIG. 11 , when the conductive particles are mixed into the adhesive layer  22   a  for adhesively fixing the substrate  21  and the polarizing plate PL 2  to each other, the process for forming the conductor layer  25  as illustrated in  FIGS. 9 and 10  can be removed. Therefore, its manufacturing process can be more simplified than those of the display device LCD 4  with the input device illustrated in  FIG. 9  and the display device LCD 5  with the input device illustrated in  FIG. 10 . However, from a viewpoint of stably arranging the charge relaxation layer in vicinity of the detection electrode Rx, it is preferred that the conductor layer  25  is formed separately from the adhesive layer  22  as illustrated in  FIGS. 9 and 10 . 
     &lt;Preferable Thickness of Adhesive Layer&gt; 
     Next, regarding a preferable value of the thickness of the adhesive layer  22  (adhesive layer  22   a  in the case of  FIG. 11 ) for adhesively fixing the touch detection base member  20  and the display device LCD 1 , results studied by the inventors of the present application will be explained.  FIGS. 12A and 12B  are explanatory diagrams illustrating the results studied by the inventors of the present application regarding the thickness of the adhesive layer for adhesively fixing the touch detection base member of the display device with the input device illustrated in  FIG. 6  and the display device. The evaluation results illustrated in  FIGS. 12A and 12B  show results studied on a correlation between the thickness of the adhesive layer  22  and the detection accuracy with changing the thickness of the adhesive layer  22  illustrated in  FIG. 6 . Note that the evaluations illustrated in  FIGS. 12A and 12B  have been made by preparing two types of the display device LCD 1  having the different thicknesses of the substrate  11  and the polarizing plate PL 2  illustrated in  FIG. 6  from each other, and changing the thickness of the adhesive layer  22  for each of them. In the evaluation result illustrated in an upper column of  FIG. 12A , it has been set that the thickness of the substrate  11  is 300 μm (“relative dielectric constant/thickness” thereof is 0.020) and the thickness of the polarizing plate PL 2  is 100 μm (“relative dielectric constant/thickness” thereof is 0.030). Moreover, in the evaluation result illustrated in a lower column of  FIG. 12B , it has been set that the thickness of the substrate  11  is 600 μm (“relative dielectric constant /thickness” thereof is 0.010) and the thickness of the polarizing plate PL 2  is 150 μm (“relative dielectric constant/thickness” thereof is 0.020). The detection accuracy (Accuracy) of the input position has been used as an evaluation index. The detection accuracy of the input position is an index indicating a degree of an error in coordinate detection, and the detection accuracy of small- to middle-sized touch panels is generally preferably ±2.0 mm or less. 
     Moreover, in the evaluations illustrated in  FIGS. 12A and 12B , it is set that “relative dielectric constant/thickness” of the single adhesive layer  22  is indicated by “A 1 ” and set that “relative dielectric constant/thickness” of a stacking body obtained by combining the layers of the substrate  11 , the adhesive layer  19 , the polarizing plate PL 2 , and the adhesive layer  22  with each other (hereinafter, simply referred to as a stacking body in the explanation of  FIGS. 12A and 12B ) is indicated by “A 2 ”, a correlation between “A 2 /A 1 ” and the detection accuracy has been also evaluated. More specifically, when the thickness of the adhesive layer  22  in the upper column of  FIG. 12A  is 100 μm, with taking 500 μm of the thickness of the adhesive layer  22  in the lower column of  FIG. 12B  as a reference value, it is evaluated within what range the difference from this reference value is so that the detection accuracy is within ±2.0 mm. 
     As illustrated in  FIG. 12A , when a relatively-thin substrate  11  having a thickness of 300 μm is applied, it has been found that the detection accuracy can be within ±2.0 mm when the thickness of the adhesive layer  22  is within a range of 60 μm or thicker but 160 μm or thinner. More particularly, in a range of the thickness of the adhesive layer  22  which is within 80 μm or thicker but 120 μm or thinner, the detection accuracy is within ±0.4 mm, and therefore, a touch panel with high accuracy can be obtained. On the other hand, as illustrated in  FIG. 12B , when a substrate  11  having a thickness of 600 μm is applied, it has been found that the detection accuracy can be within ±2.0 mm when the thickness of the adhesive layer  22  is within a range of 400 μm or thicker but 700 μm or thinner. Based on the above-described facts, in the case of the substrate  11  having the thickness of 300 μm or thicker, it is preferred that the thickness of the adhesive layer  22  is at least 60 μm or thicker. 
     Moreover, when sections showing the difference from each reference value in  FIGS. 12A and 12B  are viewed, it has been found that the detection accuracy can be within ±2.0 mm in both of the cases of  FIGS. 12A and 12B  when the difference from each reference value is within ±10%. As the difference from each reference value illustrated in  FIGS. 12A and 12B , when a value (% value) of “A 2 /A 1 ” in the minimum detection accuracy (detection error) is taken as the reference value, a degree of shift from the reference value is expressed in terms of “%”. That is, when variation in the thickness of the adhesive layer  22  illustrated in  FIG. 6  occurs, a degree of the variation is set to be within a predetermined range, so that the distribution of the detection accuracy on an input surface of the input device can be uniformed. As this predetermined range, a value of the difference from each reference value illustrated in  FIGS. 12A and 12B  may be within ±10%. 
     However, as described above, in order to make the external force applied to the substrate  21  serving as the covering member difficult to transmit to the substrate  11 , the adhesive layer  22  is made of a resin material having elasticity lower than that of the substrate  11 . Therefore, as different from a plate material formed so as to previously have a certain thickness, when the substrate  21  and the display device LCD 1  are adhesively fixed to each other, a thickness thereof is adjusted, and therefore, a technique for reducing the variation in the thickness of the adhesive layer  22  is required. Accordingly, the inventors of the present application have studied on the technique for reducing the variation in the thickness of the adhesive layer  22 . 
     &lt;Technique for Controlling Thickness of Adhesive Layer&gt; 
       FIG. 13  is an enlarged cross-sectional diagram illustrating an enlarged adhesion interface between the touch detection base member and the display device illustrated in  FIG. 6 . Note that how to control the thickness of the adhesive layer  22  will be explained below by exemplifying the application of the display device LCD 2  with the input device illustrated in  FIG. 6  for easily understanding. However, the technique can be applied to other modification examples described above and later. 
     As illustrated in  FIG. 13 , into the adhesive layer  22 , a plurality of spacer members  26  for defining a thickness D 2  of the adhesive layer  22  are mixed. Each of the spacer members  26  has a spherical shape in an example illustrated in  FIG. 13 , and diameters SR 1  of the plurality of spacer members  26  are uniformed. Note that the expression that the diameters SR 1  of the plurality of spacer members  26  are uniformed means that the diameters SR 1  of the plurality of spacer members  26  have almost the same value as each other. Even when those having a different diameter value are contained due to, for example, influences of the processing precision or the others, this state is allowed. Moreover, the elasticity of the spacer members  26  is higher than the elasticity of the adhesive layer  22 . 
     As described above, by mixing the plurality of spacer members  26  whose diameters SR 1  are uniformed into the adhesive layer  22 , the plurality of spacer members  26  are sandwiched between the polarizing plate PL 2  and the detection electrodes Rx (or the back surface  21   b  of the substrate  21 ) so as to be in contact with both of them. In this manner, the thickness D 2  of the adhesive layer  22  is defined by the diameters SR 1  of the spacer members  26 . That is, the diameters SR 1  of the plurality of spacer members  26  are uniformed, so that the variation in the thickness D 2  of the adhesive layer  22  can be reduced. 
     Here, in consideration of the influence on the visible light passing through the adhesive layer  22 , it is preferred to use a transparent material with respect to the visible light for each of the spacer members  26 . Moreover, when the refractive indexes of the resin material forming the adhesive layer  22  and the spacer members  26  are equal to each other, the spacer members  26  are not visually recognized. However, since the thickness D 2  of the adhesive layer  22  is set to at least 60 μm or thicker, preferably 100 μm or thicker as described above, the diameters SR 1  of the spacer members  26  are also correspondingly set to at least 60 μm or thicker. According to the study by the inventors of the present application, it has been found that the spacer members  26  are easily visually recognized when the diameters SR 1  of the spacer members  26  are large. 
       FIG. 14  is an explanatory diagram illustrating an evaluation result regarding a relation between the visibility and the refractive index of the spacer members illustrated in  FIG. 13 . The evaluation illustrated in  FIG. 14  shows a correlation among the refractive index of the adhesive layer  22  and the refractive index of the spacer members  26  illustrated in  FIG. 13  and the visibility of the spacer members  26 . More specifically, when it is assumed that the refractive index of the adhesive layer  22  is “R 1 ” and that the refractive index of the spacer members is “R 2 ”, a relation between a ratio of “(R 1 −R 2 )/(R 1 +R 2 )” and an evaluation result obtained by a visual inspection is shown. Moreover, in the evaluation illustrated in  FIG. 14 , the visibility has been verified by preparing three types of the adhesive layer  22  having different refractive indexes (R 1 ) from each other and changing the refractive index (R 2 ) of the spacer members  26 . Moreover, in a section of the evaluation of the visibility illustrated in  FIG. 14 , the evaluation results in cases that the diameters SR 1  of the spacer members  26  illustrated in  FIG. 13  are 200 μm and 500 μm are shown. As a method of the evaluation, when the display device LCD 2  with the input device is visually viewed from the viewer VW side illustrated in  FIG. 6 , a cross mark (x) is added if the spacer members  26  can be visually recognized, and a circle mark (o) is added if it cannot be visually recognized. 
     As illustrated in  FIG. 14 , the correlation between “(R 1 −R 2 )/(R 1 +R 2 )” and the visibility of the spacer members  26  has been verified. That is, in the case that the diameters SRI of the spacer members  26  illustrated in  FIG. 13  are 200 μm or smaller, by setting the value of (R 1 −R 2 )/(R 1 +R 2 ) to be within ±0.3%, the spacer members  26  are almost not visually recognized. Moreover, in the case that the diameters SRI of the spacer members  26  are 500 μm or smaller, by setting the value of (R 1 −R 2 )/(R 1 +R 2 ) to be within ± 2 . 0 %, the spacer members  26  are almost not visually recognized. 
     According to the present embodiment, even in a case that such large spacer members  26  as having the diameter SRI exceeding 60 μm or larger are mixed into the adhesive layer  22 , the reduction in the display reliability due to the spacer members  26  can be suppressed by uniforming the refractive index of the adhesive layer  22  and the refractive index of the spacer members  26  within the above-described range. 
     &lt;Method of Manufacturing Display Device with Input Device&gt; 
     Next, a method of manufacturing the display device with the input device explained in the present embodiment will be explained. Note that, while the following explanation will be made by exemplifying a method of manufacturing the display device LCD 2  with the input device illustrated in  FIG. 6  as a typical example, only different points therefrom will be briefly explained for other modification examples.  FIG. 15  is an assembling flow diagram illustrating the outline of the manufacturing process for the display device with the input device illustrated in  FIG. 6 . Note that specific members described in the following explanation will be explained appropriately with reference to the above-described  FIGS. 5 to 11 . 
     As illustrated in  FIG. 15 , the method of manufacturing the display device with the input device of the present embodiment includes an assembly process of the display device, an assembly process of the touch detection base member, and a mounting process of the touch detection base member. 
     First, in the assembly process of the display device, each member of the LCD 1  illustrated in  FIG. 6  except for the light source LS is assembled. As illustrated in  FIG. 15 , the present process includes: an assembly process of the array substrate; a preparation process of the filter substrate; and an overlap process. 
     In the assembly process of the array substrate, on the front surface  12   a  of the substrate  12  illustrated in  FIG. 6  in which a TFT has been previously formed, each member is sequentially formed. That is, the common electrode  14 , the insulating layer  15 , and the pixel electrode  13  are sequentially formed on the front surface  12   a  of the substrate  12 . Here, while the common electrode  14  and the pixel electrode  13  are formed by using a transparent electrode material such as ITO or others, they can be heated as long as prior to the formation of the liquid crystal layer  16 . Therefore, the common electrode  14  and the pixel electrode  13  are heated prior to the formation of the liquid crystal layer  16  at a temperature of, for example, about 200° C. or higher, so that the resistance values of the common electrode  14  and the pixel electrodes  13  can be reduced, or the visible light transmittance can be improved. Note that, in the present process, for example, an orientation film and others are formed in addition to the common electrode  14 , the insulating layer  15 , and the pixel electrode  13  illustrated in  FIG. 6 . Moreover, the liquid crystal layer  16  can be formed after the formation of the pixel electrode  13  in the assembly process of the array substrate. Moreover, as a modification example, this also can be formed by injecting liquid crystals LC between the substrate  11  and the substrate  12  after the overlap process illustrated in  FIG. 15 . 
     Further, the substrate  11  illustrated in  FIG. 6  corresponds to the filter substrate illustrated in  FIG. 15 . In the assembly process of the filter substrate, the substrate  11  illustrated in  FIG. 6  is prepared, and, for example, the orientation film not illustrated or others is formed on the back surface  1  lb side. In the assembly process of the filter substrates, not the orientation film but, for example, a color filter or others can be formed. However, since the substrate  11  is thinned in a substrate etching process illustrated in  FIG. 15 , the members to be arranged on the back surface  1  lb side of the substrate  11  are formed in the present process. 
     Moreover, in the overlap process illustrated in  FIG. 15 , relative positions of the substrate  11  and the substrate  12  in a plan view are aligned with each other so that the back surface  1  lb of the substrate  11  and the front surface  12   a  of the substrate  12  are overlapped so as to face each other. If the liquid crystal layer  16  has been already formed, the liquid crystal layer  16  is filled between the substrate  11  and the substrate  12  by the present process. 
     Next, in the substrate etching process illustrated in  FIG. 15 , a part of each of the front surface  11   a  side of the substrate  11  and the back surface  12   b  side of the substrate  12  is removed, and they are thinned. In this manner, by overlapping the substrate  11  and the substrate  12  with each other, and then, thinning each of the substrate  11  and the substrate  12 , damages on the substrates  11  and  12  can be suppressed in the respective processes from the assembly process of the array substrate to the overlap process. 
     Moreover, in a mounting process of an IC chip and a mounting process of a wiring substrate shown in parentheses in  FIG. 15 , the semiconductor chip  17  and the wiring substrate  18  illustrated in  FIG. 6  are mounted. At this time, a leader wire (whose illustration is omitted) electrically connected to each of the common electrode  14  and the pixel electrode  13  is formed on the front surface  12   a  side of the substrate  12 . In the present process, the leader wire and a plurality of terminals (whose illustration is omitted) formed on the wiring substrate  18  are electrically connected to each other. As described above, the wiring substrate  18  is, for example, a flexible wiring plate. While a method of the electrical connection is not particularly limited, the electrical connection can be achieved without using a joining material such as solder by, for example, performing the connection (or a press-bonding connection) via a so-called anisotropic conductive film (ACF) in which a conductive member (such as conductive particles) for forming a conductive passage is buried inside a resin film. The semiconductor chip  17  can be also similarly electrically connected to the TFT via the anisotropic conductive film. Note that a location where the semiconductor chip  17  is mounted as described above is not limited on the substrate  12 , and a mounting mode on, for example, the wiring substrate  18  can be also applied. The timing for mounting the wiring substrate  18  also has various modification examples, and the mounting can be performed, for example, prior to the substrate etching process or subsequent to a mounting process of a polarizing plate. However, from a viewpoint of preventing the damages on the wiring substrate  18  due to the substrate etching process, the mounting is preferably performed subsequent to the substrate etching process as illustrated in  FIG. 15 . Moreover, from a viewpoint of preventing the damages on the polarizing plates PL 1  and PL 2  in the connection of the wiring substrate  18 , the mounting is preferably performed prior to the mounting process of the polarizing plate. 
     Moreover, in the mounting process of the polarizing plate illustrated in  FIG. 15 , the polarizing plates PL 1  and PL 2  illustrated in  FIG. 6  are mounted. In this process, via, for example, a film-shaped adhesive film  19 , the polarizing plate PL 1  is adhesively fixed onto the base surface  12   b  of the substrate  12  and the polarizing plate PL 2  is adhesively fixed onto the front surface Ila of the substrate  11 , respectively. 
     Note that, when the polarizing plate PL 2  is adhesively fixed onto the front surface  11  a of the substrate  11  via the adhesive layer  19  as the display device LCD 4  with the input device illustrated in  FIG. 9 , a formation process of a conductor layer is performed after the mounting process of the polarizing plate as shown in parentheses in  FIG. 15 . On the other hand, in the cases of the display devices LCD 2 , LCD 5 , and LCD 6  with the input device illustrated in  FIGS. 6, 10, and 11 , the formation process of the conductor layer after the mounting process of the polarizing plate is not performed. 
     Moreover, in the present embodiment, the touch detection base member  20  is formed separately from the display device LCD 1  as described above, and therefore, an assembly process of the touch detection base member is included as illustrated in  FIG. 15 . This process can be performed independently from the assembly process of the display device, and therefore, an order of this process is not limited to prior or subsequent to the assembly process of the display device. 
     This assembly process of the touch detection base member includes a preparation process of a substrate for preparing the substrate  21  illustrated in  FIG. 6 . Moreover, the assembly process of the touch detection base member also includes a formation process of a detection electrode for forming the plurality of detection electrodes Rx in such a pattern as illustrated in  FIG. 8 . In this formation process of the detection electrode, a transparent electrode material such as ITO is uniformly formed on the back surface  21   b  side of the substrate  21 , and then, unnecessary parts are removed so that such a pattern as illustrated in  FIG. 8  is formed. Moreover, in the formation process of the detection electrode, the heating process is performed at a temperature of, for example, about 200° C. or higher, so that the resistance values of the detection electrodes Rx can be reduced. Further, the visible light transmittance of the detection electrodes Rx can be improved. Still further, when a metallic leader wire  24  as illustrated in  FIG. 8  is formed, this can be formed subsequent to the detection of the detection electrodes Rx or prior to the formation of the detection electrodes Rx by using a metal film forming technique such as a sputtering method. 
     Here, when the detection electrodes Rx are formed on the front surface  11   a  of the substrate  11  as the display device LCD 3  with the input device illustrated in  FIG. 7 , they are formed subsequent to the substrate etching process but prior to the mounting process of the polarizing plate illustrated in  FIG. 15 . Since the liquid crystal layer  16  has already been formed at this moment, it is preferred to suppress the temperature to be applied upon the formation of the detection electrodes Rx at about 70° C. at the highest or lower in order to suppress the degradation in the liquid crystals LC. That is, in the display device LCD 2  with the input device illustrated in  FIG. 6 , the detection electrodes Rx are formed on the substrate  21  not configuring the display device LCD 1 , so that such a high temperature as about 200° C. can be applied upon the formation of the detection electrodes Rx. 
     Next, in the cases of the display device LCD 2  with the input device illustrated in  FIG. 6  and the display device LCD 6  with the input device illustrated in  FIG. 11 , the sequence proceeds to the detection process of the touch detection base member after the mounting process of the wiring substrate illustrated in  FIG. 15 . However, in the case of the display device LCD 5  with the input device illustrated in  FIG. 10 , the sequence proceeds to a formation process of a conductor layer. The conductor layer forming process is performed subsequent to the formation process of the detection electrode but prior to the mounting process of the touch detection base member. In this process, by applying the conductive resin material prepared by mixing the conductive particles into the paste-like resin material, the plurality of detection electrodes Rx illustrated in  FIG. 8  are coated therewith. Then, by hardening the resin component of the conductive resin material, the conductor layer  25  covering the plurality of detection electrodes Rx is obtained. The preferable aspects of the conductor layer  25  such as the sheet resistance value have already been explained, and therefore, overlap explanations will be omitted. 
     As described above, by applying the production method of applying the paste-like material, the conductive resin material can be buried between the detection electrodes Rx adjacent to each other. Therefore, the electrostatic capacity of the capacitive element C 1  illustrated in  FIG. 1  can be stabilized. As a result, the detection accuracy of the input position can be improved, and therefore, the detection reliability can also be improved. Moreover, by reducing the space between the detection electrodes Rx adjacent to each other, the display light can be stably transmitted. 
     Next, as illustrated in  FIG. 15 , the assembly process of the touch detection base member includes a mounting process of a wiring substrate. In this mounting process of the wiring substrate, a wiring substrate  23  such as a flexible wiring plate is electrically connected to a plurality of terminals formed on the back surface  21   b  of the substrate  21 . While a method for the electrical connection is not particularly limited, the electrical connection can be achieved without using a joining material such as solder by performing the connection (or press-bonding connection) via an anisotropic conductive film as similar to the above-described wiring substrate  18 . 
     Note that the present process can be removed in a case of an aspect of no jointing of the wiring substrate  23  although a detailed description will be made later, and therefore, the corresponding process is shown in parentheses in  FIG. 15 . 
     Next, a formation process of an adhesive layer is performed as a preparation for a mounting process of a touch detection base member illustrated in  FIG. 15 . In this process, for example, the adhesive layer  22  is arranged on the polarizing plate PL 2  illustrated in  FIG. 6 . The adhesive layer  22  is made of, for example, an ultraviolet curable resin, and a state thereof before the curing is in a paste state or a liquid state. Therefore, in the present process, by applying the adhesive layer  22  onto the polarizing plate PL 2 , the paste-state adhesive layer  22  is arranged thereon. By using this paste-state or liquid-state adhesive layer  22  as described above, generation of a space in an adhesion interface of the adhesive layer  22  can be suppressed. For example, even when the detection electrodes Rx and the adhesive layer  22  are tightly adhered to each other as illustrated in  FIG. 6 , the adhesive layer  22  can be buried inside the space between the detection electrodes Rx adjacent to each other. Note that the adhesive layer  22   a  illustrated in  FIG. 11  to which the conductive particles are mixed can be formed in the same process by previously mixing the conductive particles into a paste-state resin material. Moreover, the same goes for the case of mixing the spacer members  26  as explained with reference to  FIG. 13 . 
     Next, as the mounting process of the touch detection base member illustrated in  FIG. 15 , the touch detection base member  20  is adhesively fixed to the display device LCD 1 . In the present process, the positions of the display device LCD 1  and the touch detection base member  20  are aligned first so that the front surface lla of the substrate  11  of the display device LCD 1  and the back surface  21   b  of the substrate  21  face each other. At this time, the adhesive layer  22  is applied onto the front surface  11   a  in the paste state obtained before the curing. Therefore, no large pressing force is required for tightly adhering the touch detection base member  20  and the adhesive layer  22  to each other, and therefore, they can be tightly adhered to each other by simply applying a slight load thereon in addition to a weight of the substrate  21  itself. Moreover, at this time, the adhesive layer  22  is buried between the detection electrodes Rx adjacent to each other so as to fill the space therebetween. 
     However, when the load required for tightly adhering the touch detection base member  20  and the adhesive layer  22  to each other is small, it is difficult to control the thickness D 2 of the adhesive layer (see  FIG. 13 ). Accordingly, as explained with reference to  FIG. 13 , it is preferred to control the thickness D 2  of the adhesive layer  22  by mixing the spacer members  26  into the adhesive layer  22 . 
     After the touch detection base member  20  and the adhesive layer  22  are tightly adhered to each other, the resin component of the adhesive layer  22  is hardened so that the touch detection base member  20  is adhesively fixed. For example, if an ultraviolet curable resin material is used for the adhesive layer  22 , the adhesive layer can be hardened by irradiating the layer with an ultraviolet ray, and therefore, the degradation in the liquid crystals LC upon the hardening of the adhesive layer  22  can be prevented or suppressed. By the hardening of the adhesive layer  22 , the substrate  21  is fixed to the display device LCD 1  in a state that the detection electrodes Rx and the front surface Ila of the substrate  11  are separated apart from each other. 
     Through the above-described processes, the display device LCD 2  with the input device (except for the light source LS) illustrated in  FIG. 6  is obtained. Then, the obtained display device LCD 2  with the input device is embedded in a housing not illustrated, so that an electronic apparatus in which a touch panel is embedded can be obtained. The light source LS illustrated in  FIG. 6  can be previously embedded in the housing. 
     Note that the different points of the manufacturing methods for the display devices LCD 4 , LCDS, and LCD 6  with the input device illustrated in  FIGS. 9, 10, and 11  from the manufacturing method for the display device LCD 2  with the input device have been explained, and therefore, overlap explanations will be omitted. 
     Second Embodiment 
     In the above-described first embodiment, the aspect in which the wiring substrates  18  and  23  are connected to the display device LCD 1  and the touch detection base member  20  have been explained. However, from a viewpoint of reducing the number of wiring substrates to be connected to the display device with the input device so as to downsize the mounting space, it is preferred to integrate the wiring substrate  18  and the wiring substrate  23 . According to the study by the inventors of the present application, as explained in the above-described embodiment, it has been found that the wiring substrates  18  and  23  are easily integrated particularly when the surface (for example, the back surface  21 b) on which the detection electrodes Rx of the touch detection base member  20  are formed and the surface (for example, the front surface  12 a) on which the wiring substrate  18  of the display device LCD 1  is formed face each other. In the present embodiment, the aspect of the integration of the wiring substrate  23  for the touch detection base member  20  and the wiring substrate  18  for the display device LCD 1  explained in the above-described embodiment will be explained.  FIG. 16  is an enlarged cross-sectional diagram illustrating a modification example of  FIG. 6 . Moreover,  FIG. 17  is an explanatory diagram schematically illustrating an example of a wiring layout of the wiring substrate illustrated in  FIG. 16  in a plan view. 
     A display device LCD 7  with an input device illustrated in  FIG. 16  is different from the display device LCD 2  with the input device in that the wiring substrate  23  illustrated in  FIG. 6  is not provided. On the front surface  12   a  of the substrate  12  of the display device LCD 7  with the input device, a connection terminal  31  is provided. Moreover, on the back surface  21   b  of the substrate  21  of the display device LCD 7  with the input device, a connection terminal  32  is provided. And, the connection terminal  31  and the connection terminal  32  are electrically connected with each other via a conductive member (or an inter-facing-substrate conductive material or conductive member)  30  arranged between the connection terminals  31  and  32 . 
     The connection terminal  31  is electrically connected to the wiring substrate  33  connected to the substrate  12 . Moreover, the connection terminal  32  is electrically connected to the detection electrodes Rx.  FIG. 16  illustrates the connection terminals  31  and  32  so as to be independent members from each other for easily understanding. However, the connection terminals  31  and  32  are not limited as the independent members. For example, a part of the detection electrodes Rx formed on the substrate  21  can be used also as the connection terminal  32 . Moreover, a part of the leader wire formed on the substrate  12  and electrically connected to the pixel electrode  13  or the common electrode  14  but not illustrated can be used as the connection terminal  31 . Further, as a conductor member  30  which is a conductive member for electrically connecting the connection terminal  31  and the connection terminal  32  to each other, the following materials can be exemplified. For example, a so-called anisotropic conductive resin can be used as the conductive member  30 , the anisotropic conductive resin being obtained by mixing a conductive material (or conductive particles) into a resin base member (or an insulating base member) and electrically connecting between the connection terminal  31  and the connection terminal  32  via this conductive material. Alternatively, a conductive member called a zebra rubber (or an anisotropic conductive rubber) can be used, the zebra rubber for securing a plurality of conductive passages by alternately arranging an insulating material such as rubber and a conductive material connecting between the connection terminals  31  and  32 . 
     Moreover, for example, as similar to the wiring substrate  18  and the wiring substrate  23  illustrated in  FIG. 6 , the wiring substrate  33  is a so-called flexible wiring plate on which a plurality of wires are formed in a resin film and which can be freely deformed in accordance with a shape of an arrangement location. However, the wires to be formed in the wiring substrate  33  as illustrated in  FIG. 17  include a wire  23 a to be electrically connected to the plurality of detection electrodes Rx in addition to the wire  18   a  electrically connected to the pixel electrode  13  and the wire  18 b electrically connected to the common electrode  14 . Moreover, as illustrated in  FIG. 16 , the wiring substrate  33  is electrically connected to the driving circuit DR 1  for the input device, the driving circuit DR 2  for the image display, and the detection circuit DT 1  for detecting the input position. 
     That is, in the display device LCD 7  with the input device, the plurality of conductive passages connected to the pixel electrode  13 , the common electrode  14  (also used as the driving electrode Tx in  FIG. 16 ), and the detection electrodes Rx are collectively formed on the substrate  12  side within a region where the back surface  21   b  of the substrate  21  and the front surface  12   a  of the substrate  12  face each other. In this manner, the wiring substrate  23  for the touch detection base member  20  and the wiring substrate  18  for the display device LCD 1  as illustrated in  FIG. 6  can be integrated as the wiring substrate  33  illustrated in  FIG. 16 . Note that the substrate on which the plurality of conductive passages connected to the respective electrodes are collectively formed may be either one of the substrates facing each other. That is, as a modification example although not illustrated, the wiring substrate  33  can be connected onto the substrate  21  side so as to be collectively formed on the substrate  21  side. 
     Moreover, in the display device LCD 7  with the input device, the connection terminal  31  is provided on a peripheral edge of the substrate  12 , and the connection terminal  32  is arranged at a position on a peripheral edge of the substrate  21  so as to face the connection terminal  32 . In this manner, the conductive member  30  is arranged between the connection terminals  31  and  32  arranged on the peripheral edges of the substrates  12  and  21  so as to face each other, so that the conductive member  30  supports the substrates  12  and  21  on the peripheral edges thereof. That is, the conductive member  30  functions as a reinforcing member for reinforcing the supporting strength of the peripheral edges of the substrates  12  and  21 . Moreover, by arranging the connection terminals  31  and  32  so as to face each other on the peripheral edges of the substrates  12  and  21 , the space required for electrically connecting the substrates  12  and  21  can be minimized. 
     The display device LCD 7  with the input device is structurally the same as the display device LCD 2  with the input device illustrated in  FIG. 6  in a point except for the above-described point, and therefore, overlap explanations will be omitted. Moreover, the method of manufacturing the display device LCD 7  with the input device illustrated in  FIG. 16  is the same as the method of manufacturing the display device with the input device explained with reference to  FIG. 15  except for the following point. That is, in the method of manufacturing the display device LCD 7  with the input device, the mounting process of the wiring substrate described in the assembly process of the touch detection base member illustrated in  FIG. 15  can be removed. Moreover, subsequent to the assembly process of the display device and the assembly process of the touch detection base member, an inter-substrate connection process of electrically connecting the connection terminals  31  and  32  illustrated in  FIG. 16  to each other via the conductive member  30  is added. The timing for this inter-substrate connection process varies depending on what conductive material is used as the conductive member  30 . For example, when the paste-state anisotropic conductive resin is used, the electrical connection between the substrates can be achieved at one batch in the mounting process of the touch detection base member. Moreover, when the previously-molded anisotropic conductive resin or anisotropic conductive rubber is used, one of end portions of the conductive member  30  is previously press-bonded onto the connection terminal  31  or the connection terminal  32 . Then, in the mounting process of the touch detection base member, the other end portion thereof is press-bonded thereon. 
     Next, a modification example of the display device LCD 7  with the input device illustrated in  FIG. 16  will be explained.  FIG. 18  is an enlarged cross-sectional diagram of a principal part of a first modification example of the connection portion illustrated in  FIG. 16 .  FIG. 19  is an enlarged cross-sectional diagram of a principal part of a second modification example of the connection portion illustrated in  FIG. 16 . Also,  FIG. 20  is an enlarged cross-sectional diagram of a principal part of a third modification example of the connection portion illustrated in  FIG. 16 . 
     A display device LCD 8  with an input device illustrated in  FIG. 18  is different from the display device LCD 7  with the input device illustrated in  FIG. 16  in that the connection terminal  31  is formed on the wiring substrate  33  and in that the conductive member  30  is electrically connected to the wiring substrate  33  without interposing the substrate  12  therebetween. Moreover, a display device LCD 9  with an input device illustrated in  FIG. 19  is different from the display device LCD 7  with the input device illustrated in  FIG. 16  in that the connection terminal  32  is formed on the wiring substrate  33  and in that the conductive member  30  is electrically connected to the wiring substrate  33  without interposing the substrate  21  therebetween. That is, either one of the connection terminals  31  and  32  is formed on the wiring substrate  33 . 
     In this manner, by forming either one of the connection terminals  31  and  32  on the wiring substrate  33 , the conductive member  30  can be electrically connected to the wiring substrate  33  without interposing either one of the substrate  12  and substrate  21  therebetween. In this case, the connection resistance between the wiring substrate  33  and the conductive member  30  can be reduced further than the display device LCD 7  with the input device illustrated in  FIG. 16 . For example, an anisotropic conductive film not illustrated is interposed in each connection portion between the conductive member  30  and the connection terminals  31  and  32 , so that they can be connected by using a press-bonding method. 
     Moreover, a display device LCD 10  with an input device illustrated in  FIG. 20  is different from the display device LCD 7  with the input device illustrated in  FIG. 16  in that the connection terminals  31  and  32  are electrically connected to each other via the wiring substrate  33  instead of the conductive member  30  illustrated in  FIG. 16 . That is, the wiring substrate  33  is used also as the function of the conductive member  30  illustrated in  FIG. 16  (or the function for electrically connecting between the substrate  21  side and the substrate  12  side). Since the wiring substrate  33  is, for example, the flexible wiring plate as described above, this can be easily connected to both of the connection terminals  31  and  32  by deforming the wiring substrate  33 . For example, the anisotropic conductive film not illustrated is interposed in the connection portion between the connection terminals  31  and  32 , so that they can be connected to each other by using a press-bonding method. 
     In the case of the display device LCD 10  with the input device illustrated in  FIG. 20 , the number of parts can be smaller than that of the display device LCD 7  with the input device illustrated in  FIG. 16  because of the fact that the conductive member  30  is not provided. Moreover, by connecting the connection terminals  31  and  32  by using a member having low strength for supporting the substrates  12  and  21  such as the flexible wiring plate, it is difficult to transmit the external force applied from the substrate  21  to the substrate  12  side. Thus, the damages on the substrate  12  can be suppressed. 
     &lt;Other Modification Example&gt; 
     In the foregoing, the invention made by the inventors of the present application has been concretely described based on the embodiments. However, the present invention is not limited to the foregoing embodiments and various modifications and alterations can be made within the scope of the present invention. 
     For example, in the above-described first and second embodiments, the examples of the display device have been explained by exemplifying the display device LCD 1  of the horizontal electric field mode (more specifically, the FFS mode). However, a display device LCD 11  of a vertical electric field mode as illustrated in  FIG. 21  can be applied.  FIG. 21  is a cross-sectional diagram of a principal part illustrating a modification example of  FIG. 6 . The display device LCD 11  illustrated in  FIG. 21  is different from the display device LCD 1  illustrated in  FIG. 6  in that the common electrode  14  is formed on the back surface  1  lb side of the substrate  11 . That is, a mode of the display device LCD 11  is so-called vertical electric field mode in which an electric field is applied in a thickness direction (or an out-of-plane direction) of the liquid crystal display device. A display device LCD 12  with an input device illustrated in  FIG. 21  is the same as the display device LCD 2  with the input device illustrated in  FIG. 6  also in that the common electrode  14  and the driving electrode Tx are commonly used, except in the above-described different points. As described above, even in the display device LCD 11  of such the vertical electric field mode, the display device LCD 12  with the input device can be obtained by applying the techniques explained in the above-described embodiments thereto. 
     Moreover, for example, the techniques explained in the above-described first and second embodiments can be applied to not only the liquid crystal display device but also a display device such as an organic EL (Electro-Luminescence) display. 
     Further, for example, in the above-described first and second embodiments, the modification example of the display device LCD 2  with the input device illustrated in  FIG. 6  has been explained first as the typical example upon the explanation of the modification example. However, combination of the modification examples already explained can be also applied. 
     Further, in the above-described second embodiment, for example, the aspect of the integration of the wiring substrate  18  and the wiring substrate  23  has been explained as the modification example of the display device LCD 2  with the input device illustrated in  FIG. 6 . However, if the circuit for the input device and the circuit for the display device are collectively formed on a facing surface of the substrates which face each other, the wiring substrates can be commonly used by applying the technique explained in the above-described second embodiment. For example, the invention can be also applied to a case that the driving electrode Tx for the input device is provided on the substrate  11  as a display device LCD 14  with an input device illustrated in  FIG. 22 .  FIG. 22  is a cross-sectional diagram of a principal part illustrating another modification example of  FIG. 16 . 
     The display device LCD 14  with the input device illustrated in  FIG. 22  is different from the display device LCD 7  with the input device illustrated in  FIG. 16  in that the driving electrode Tx for the input device is installed on the front surface  11   a  side of the substrate  11  of the display device LCD 13 . That is, in the display device LCD 14  with the input device, the driving electrode Tx for the input device is not used also as the common electrode  14  for the display device but is provided independently therefrom. Note that, although illustration is omitted, the driving electrode Tx provided on the front surface  11   a  side of the substrate  11  is drawn once onto the substrate  21  side via a conductive member (or a conductive material) not illustrated. That is, the detection circuit DT 1  for the input device and the driving circuit DR 1  are collectively formed on the substrate  21  side. Therefore, the circuit configuration can be simplified. 
     However, as illustrated in  FIG. 22 , the substrate  11  is not interposed between the driving electrode Tx and the detection electrodes Rx, and therefore, it is required to increase the distance D 1  larger than that of the display device LCD 7  with the input device illustrated in  FIG. 16 . Therefore, from a viewpoint of the thinning, the display device LCD 7  with the input device is more preferable. Moreover, as explained in the above-described first embodiment, also from a viewpoint of solving the problems caused by forming the transparent electrode on the front surface  11  a of the substrate  11 , the display device LCD 7  with the input device is more preferable. 
     The present invention can be widely applied to a display device with an input device and an electronic apparatus in which the display device with the input device is embedded. 
     It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.