Patent Publication Number: US-2021175282-A1

Title: Display apparatus with detection device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of PCT international application Ser. No. PCT/2019/026108 filed on Jul. 1, 2019, which designates the United States, and which claims the benefit of priority from Japanese Patent Application No. 2018-141609 filed on Jul. 27, 2018, the entire contents of which are incorporated herein by reference. 
    
    
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a display apparatus with a detection device. 
     2. Description of the Related Art 
     Inorganic electroluminescent (EL) displays provided with inorganic light-emitting diodes (micro LEDs) serving as display elements have recently been attracting attention (for example, refer to Japanese Translation of PCT International Application Publication No. 2017-529557). In inorganic EL displays, a plurality of light-emitting elements that output light in different colors are arrayed on an array substrate. Inorganic EL displays do not require any light source because they are provided with self-emitting elements and have higher light use efficiency because light is output without passing through a color filter. Inorganic EL displays have higher environmental resistance than organic EL displays provided with organic light-emitting diodes (OLEDs) serving as display elements. 
     Inorganic EL displays are expected to have a touch detection function for detecting contact or proximity of a finger or the like with or to an input surface and a force detection function for detecting force applied to the input surface, for example. 
     SUMMARY 
     A display apparatus with a detection device according to one aspect of the present disclosure comprising: a substrate having a first principal surface and a second principal surface opposite to the first principal surface; a plurality of inorganic light-emitting elements provided on the first principal surface in a display region of the substrate; a first electrode facing the first principal surface of the substrate with the inorganic light-emitting elements interposed between the first electrode and the first principal surface; a first planarizing layer provided between the substrate and the first electrode and covering at least a side surface of the inorganic light-emitting elements; and a second electrode facing the second principal surface of the substrate and configured to output a signal corresponding to a change in distance between the second electrode and the first electrode. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram of a configuration of a display apparatus with a detection device according to a first embodiment; 
         FIG. 2  is a block diagram of a configuration of a display device, the detection device, and a controller of the display apparatus with the detection device according to the first embodiment; 
         FIG. 3  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to the first embodiment; 
         FIG. 4  is a plan view schematically illustrating the display device according to the first embodiment; 
         FIG. 5  is a plan view of a plurality of pixels; 
         FIG. 6  is a sectional view along line Pa-Pb-Pc of  FIG. 4 ; 
         FIG. 7  is a plan view schematically illustrating the detection device according to the first embodiment; 
         FIG. 8  is a plan view of a relation between a first electrode and light-emitting elements; 
         FIG. 9  is a sectional view of the light-emitting element according to the first embodiment; 
         FIG. 10  is a timing waveform chart of exemplary operations of the display apparatus with the detection device according to the first embodiment; 
         FIG. 11  is a plan view schematically illustrating the detection device according to a first modification of the first embodiment; 
         FIG. 12  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to the first modification of the first embodiment; 
         FIG. 13  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a second modification of the first embodiment; 
         FIG. 14  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a third modification of the first embodiment; 
         FIG. 15  is a plan view schematically illustrating the detection device according to a fourth modification of the first embodiment; 
         FIG. 16  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a second embodiment; 
         FIG. 17  is a sectional view of the light-emitting element according to the second embodiment; and 
         FIG. 18  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a third embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Exemplary aspects (embodiments) to embody the present disclosure are described below in greater detail with reference to the accompanying drawings. The contents described in the embodiments are not intended to limit the present disclosure. Components described below include components easily conceivable by those skilled in the art and components substantially identical therewith. Furthermore, the components described below may be appropriately combined. What is disclosed herein is given by way of example only, and appropriate changes made without departing from the spirit of the present disclosure and easily conceivable by those skilled in the art naturally fall within the scope of the disclosure. To simplify the explanation, the drawings may possibly illustrate the width, the thickness, the shape, and other elements of each unit more schematically than the actual aspect. These elements, however, are given by way of example only and are not intended to limit interpretation of the present disclosure. In the present specification and the figures, components similar to those previously described with reference to previous figures are denoted by like reference numerals, and detailed explanation thereof may be appropriately omitted. 
     First Embodiment 
       FIG. 1  is a block diagram of a configuration of a display apparatus with a detection device according to a first embodiment. As illustrated in  FIG. 1 , a display apparatus  1  with a detection device includes a display device  2 , a detection device  5 , and a controller CTRL. 
     The detection device  5  includes a touch detector  51  and a force detector  52 . The force detector  52  is a device that shares at least part of a substrate or electrodes constituting the touch detector  51  and a substrate or electrodes constituting the display device  2 . 
     The touch detector  51  detects contact or proximity of an object to be detected OBJ with or to an input surface IS of the display apparatus  1  with the detection device. The touch detector  51  outputs signals due to contact or proximity of the object to be detected OBJ with or to a region overlapping the input surface IS in the perpendicular direction to the controller CTRL. The input surface IS is a plane parallel to a sensor substrate  53  included in the detection device  5  and is the surface of a cover member  100 , for example. 
     The object to be detected OBJ may be an object of a first type to be deformed in contact with the input surface IS or an object of a second type not to be deformed in contact with the input surface IS or less likely to be deformed than the object of the first type. While the object of the first type is a finger, for example, it is not limited thereto. While the object of the second type is a resin or metal stylus, for example, it is not limited thereto. 
     While the touch detector  51  is a capacitive or resistive sensor, for example, it is not limited thereto. Examples of the capacitive system include, but are not limited to, a mutual capacitive system, a self-capacitive system, etc. 
     The display device  2  displays images to the input surface IS. The display device  2  is a micro LED display device or a mini-LED display device including inorganic light-emitting diodes (LEDs) as display elements. The display element is a micro LED chip having a size of approximately 3 μm to 300 μm in planar view. The term “micro” of the micro LED is not intended to limit the size of the display element. 
     The force detector  52  detects force applied to the input surface IS by the object to be detected OBJ. Specifically, the force detector  52  outputs signals due to force applied to the input surface IS by the object to be detected OBJ to the controller CTRL. The force detector  52  is a capacitive sensor, for example. 
     The controller CTRL calculates a force signal value indicating force based on the signals output from the force detector  52 . The controller CTRL includes a display controller  11 , a detection controller  4 , and a host HST. The detection controller  4  includes a touch detection controller  40  and a force detection controller  48 . 
     The display controller  11  is an IC chip (e.g., a drive IC  200 ) mounted on a substrate of the display device  2 , for example. The detection controller  4  is an IC chip mounted on a printed circuit board (e.g., a flexible printed circuit board) coupled to the sensor substrate  53 , for example. The host HST is a central processing circuit (CPU), for example. The display controller  11 , the detection controller  4 , and the host HST cooperate to control the touch detector  51 , the display device  2 , and the force detector  52 . The IC chip constituting the display controller  11  may be mounted on a printed circuit board coupled to the substrate of the display device  2 , and the display controller  11  and the detection controller  4  may be incorporated in one IC chip. 
     The processing for calculating the force signal value may be performed by the display controller  11 , the detection controller  4 , or the host HST in the controller CTRL. Alternatively, two or more of the display controller  11 , the detection controller  4 , and the host HST may cooperate to perform the processing. 
       FIG. 2  is a block diagram of a configuration of the display device, the detection device, and the controller of the display apparatus with the detection device according to the first embodiment. As illustrated in  FIG. 2 , the controller CTRL includes the display controller  11 , a gate driver  12 , a source driver  13 , a source selector  13 S, and the detection controller  4 . The display apparatus  1  with the detection device is a device in which the touch detector  51  is mounted on the display device  2 . Part of the members, such as a substrate and electrodes, used as the display device  2  may also be used as part of the members, such as a substrate and electrodes, used as the touch detector  51 . At least any one of the gate driver  12 , the source driver  13 , and the source selector  13 S may be incorporated in the IC chip of the display controller  11  or provided on the substrate constituting the display device  2 . 
     The display device  2  sequentially scans horizontal lines one by one to perform display based on scanning signals Vscan supplied from the gate driver  12 . The display controller  11  is a circuit (control device) that controls the gate driver  12 , the source driver  13 , and the detection controller  4 . The display controller  11  supplies control signals to the gate driver  12 , the source driver  13 , and the detection controller  4  based on video signals Vdisp supplied from the host HST. The display controller  11  generates image signals SIG to which pixel signals Vpix are time-division multiplexed from the video signals Vdisp of one horizontal line and supplies the image signals SIG to the source driver  13 . 
     The gate driver  12  is a circuit that sequentially selects one horizontal line to be an object for display drive in the display device  2  based on the control signals supplied from the display controller  11 . In other words, the gate driver  12  is a circuit that supplies the scanning signals Vscan to a gate line selected to be an object for display drive out of the gate lines included in the display device  2 . 
     The source driver  13  is a circuit that supplies the pixel signals Vpix to respective pixels Pix of the display device  2  based on the control signals supplied from the display controller  11 . The source driver  13  is supplied with  6 -bit red (R), green (G), and blue (B) image signals SIG, for example. 
     The source driver  13  receives the image signals SIG from the display controller  11  and supplies them to the source selector  13 S. The source driver  13  generates switch control signals SEL necessary to separate the pixel signals Vpix multiplexed to the image signals SIG and supplies the switch control signals SEL and the image signals SIG to the source selector  13 S. The source selector  13 S includes a plurality of switching elements. The source selector  13 S receives the switch control signals SEL and the image signals SIG from the source driver  13 , generates the pixel signals Vpix, and supplies them to the display device  2 . With the source selector  13 S, the number of wires between the source driver  13  and the display controller  11  can be reduced. The source selector  13 S is not necessarily provided. In other words, the pixel signals Vpix may be directly supplied from the display controller  11  to the source driver  13 . The display controller  11  may perform part of control on the source driver  13 , and only the source selector  13 S may be disposed. 
     The detection controller  4  includes a first drive electrode driver  14 . The first drive electrode driver  14  is a circuit that supplies touch drive signals Vtxd to drive electrodes Tx of the detection device  5  based on control signals supplied from a detection timing controller  46 . The touch drive signal Vtxd is an AC rectangular wave at a predetermined frequency (e.g., a frequency of the order of several kilohertz to several hundred kilohertz), for example. The AC waveform of the touch drive signal Vtxd may be a sine wave or a triangular wave. When the touch detection controller  40  performs a touch detection operation by the self-capacitive system, the first drive electrode driver  14  supplies the touch drive signals Vtxd to one of the drive electrodes Tx and detection electrodes Rx 1 . 
     The detection controller  4  includes a second drive electrode driver  15 . The second drive electrode driver  15  is a circuit that supplies second drive signals Vd to at least one of the drive electrodes Tx and the detection electrodes Rx 1  of the detection device  5  based on control signals supplied from the detection timing controller  46 . When the force detection controller  48  performs a force detection operation by the self-capacitive system, the second drive electrode driver  15  may supply the second drive signals Vd to a second electrode Rx 2 . 
     The touch detector  51  sequentially scans detection blocks one by one to perform touch detection based on the touch drive signals Vtxd supplied from the first drive electrode driver  14 . The touch detector  51  is a capacitive touch panel, for example. The touch detector  51  includes a first electrode  54  (the drive electrodes Tx and the detection electrodes Rx 1  (refer to  FIG. 7 )). The touch detector  51  supplies touch detection signals Vdet 1  corresponding to a change in capacitance between the drive electrodes Tx and the detection electrodes Rx 1  caused by proximity or contact of an external object, such as a finger. The touch detector  51  performs both mutual capacitive touch detection and self-capacitive touch detection. Alternatively, the touch detector  51  may perform one of mutual capacitive touch detection and self-capacitive touch detection. 
     The force detector  52  performs mutual capacitive or self-capacitive force detection based on the second drive signals Vd supplied from the second drive electrode driver  15 . The second electrode Rx 2  (refer to  FIG. 6 ) outputs force detection signals Vdet 2 . 
     The detection controller  4  detects whether a touch is made on the input surface IS based on the control signals supplied from the display controller  11  and the touch detection signals Vdet 1  supplied from the touch detector  51 . In the present specification, touch indicates a state where the object to be detected OBJ is in contact with or in proximity to the input surface IS. The detection controller  4  detects force applied to the input surface IS based on the force detection signals Vdet 2  supplied from the force detector  52 . The detection controller  4  is a circuit that calculates, when a touch is detected, the coordinates and the contact area of the touch in a touch detection region. 
     The detection controller  4  includes a first detection signal amplifier  41 , a second detection signal amplifier  42 , a first A/D converter  43 - 1 , a second A/D converter  43 - 2 , a signal processor  44 , a coordinate extractor  45 , and a detection timing controller  46 . The signal processor  44  includes a touch detection processor  441  and a force detection processor  442 . The first detection signal amplifier  41 , the first A/D converter  43 - 1 , the coordinate extractor  45 , and the touch detection processor  441  constitute the touch detection controller  40 . The first detection signal amplifier  41 , the second detection signal amplifier  42 , the first A/D converter  43 - 1 , the second A/D converter  43 - 2 , and the force detection processor  442  constitute the force detection controller  48 . 
     The first detection signal amplifier  41  is an integrating circuit, for example, and amplifies the touch detection signals Vdet 1  supplied from the touch detector  51 . The first A/D converter  43 - 1  samples analog signals output from the first detection signal amplifier  41  to convert them into digital signals at a timing synchronized with the touch drive signals Vtxd. 
     The second detection signal amplifier  42  is an integrating circuit, for example, and amplifies the force detection signals Vdet 2  supplied from the force detector  52 . The second A/D converter  43 - 2  samples analog signals output from the second detection signal amplifier  42  to convert them into digital signals at a timing synchronized with the second drive signals Vd. 
     The signal processor  44  is a logic circuit that performs touch detection for detecting whether a touch is made on the input surface IS based on the output signals from the first A/D converter  43 - 1  and performs force detection for detecting force applied to the input surface IS based on the output signals from the second A/D converter  43 - 2 . The signal processor  44  performs processing of extracting a signal (absolute value |ΔV|) of the difference between the detection signals caused by a finger. The signal processor  44  compares the absolute value |ΔV| with a predetermined threshold voltage. If the absolute value |ΔV| is lower than the threshold voltage, the signal processor  44  determines that an object to be detected is in a non-contact state. By contrast, if the absolute value |ΔV| is equal to or higher than the threshold voltage, the signal processor  44  determines that an object to be detected is in a contact state or a proximity state. The signal processor  44  calculates force applied to the input surface IS based on the absolute value |ΔV|. The signal processor  44  outputs the force applied to the input surface IS as a force detection value Fcor. 
     The coordinate extractor  45  is a logic circuit that calculates, when the signal processor  44  detects at least one of a touch and force applied to the input surface IS, the coordinates of the touch detection position on the input surface IS. The coordinate extractor  45  outputs the coordinates of the touch detection position as output signals Vout. The touch detection controller  40  does not necessarily include the coordinate extractor  45  and may output the touch detection signals Vdet 1  as the output signals Vout without calculating the coordinates of the touch detection position. The touch detection controller  40  may output the output signals Vout to the display controller  11 . The display controller  11  can perform a predetermined display or detection operation based on the output signals Vout. 
     The force detection controller  48  receives the output signals Vout output from the coordinate extractor  45 . The force detection controller  48  may correct the force detection value Fcor using the output signals Vout output from the coordinate extractor  45 . 
     The following describes an exemplary configuration of the display apparatus  1  with the detection device according to the present embodiment in greater detail.  FIG. 3  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to the first embodiment.  FIG. 4  is a plan view schematically illustrating the display device according to the first embodiment.  FIG. 5  is a plan view of a plurality of pixels.  FIG. 6  is a sectional view along line Pa-Pb-Pc of  FIG. 4 .  FIG. 7  is a plan view schematically illustrating the detection device according to the first embodiment.  FIG. 8  is a plan view of a relation between the first electrode and light-emitting elements. 
     As illustrated in  FIG. 3 , the display device  2 , the detection device  5 , and the cover member  100  are layered in the display apparatus  1  with the detection device. The cover member  100  is provided on the outermost surface of the display apparatus  1  with the detection device covering the first electrode  54  and the sensor substrate  53  included in the detection device  5  and the display device  2 . The upper surface of the cover member  100  serves as the input surface IS. The cover member  100  is a translucent glass or resin substrate, for example. 
     In the present specification, a direction from a substrate  21  of the display device  2  to the input surface IS in a direction perpendicular to the surface of the substrate  21  is referred to as an “upper side”. A direction from the input surface IS to the substrate  21  is referred to as a “lower side”. The “planar view” indicates a view seen from the direction perpendicular to the surface of the substrate  21 . 
     A first direction Dx and a second direction Dy are parallel to the surface of the substrate  21 . The first direction Dx is orthogonal to the second direction Dy. The first direction Dx may intersect the second direction Dy without being orthogonal thereto. A third direction Dz is orthogonal to the first direction Dx and the second direction Dy. In other words, the third direction Dz is the direction perpendicular to the surface of the substrate  21 . 
     The display device  2  includes an array substrate  20 , a plurality of light-emitting elements  3 , and a first planarizing layer  27 . The light-emitting elements  3  are provided on the array substrate  20 . As illustrated in  FIG. 4 , the display device  2  includes the pixels Pix provided on the array substrate  20 , and the pixels Pix are disposed in a matrix (row-column configuration) in a display region AA. The gate driver  12 , a drive integrated circuit (IC)  200 , and cathode wiring  26  are disposed on the array substrate  20 . The array substrate  20  is a drive circuit board for driving the pixels Pix and is also called a backplane or an active matrix substrate. The array substrate  20  is provided with the substrate  21 , first transistors Tr 1 , second transistors Tr 2 , gate line transistors TrG, and various kinds of wiring, for example. The first transistors Tr 1 , the second transistors Tr 2 , and other transistors are switching elements provided to the respective pixels Pix. The gate line transistors TrG are switching elements included in the gate driver  12 . 
     As illustrated in  FIG. 4 , the display device  2  has a display region AA and a peripheral region GA. The display region AA is provided overlapping the pixels Pix and displays an image. The peripheral region GA does not overlap the pixels Pix and is disposed outside the display region AA. 
     The pixels Pix are arrayed in a first direction Dx and a second direction Dy in the display region AA of the substrate  21 . The pixels Pix each include a light-emitting element  3 . The display apparatus  1  displays an image by outputting light in different colors from the respective light-emitting elements  3 . 
     The gate driver  12  drives a plurality of gate lines based on various control signals received from the drive IC  200 . The gate driver  12  sequentially or simultaneously selects a plurality of gate lines and supply gate drive signals to the selected gate lines. As a result, the gate driver  12  selects a plurality of pixels Pix coupled to the gate lines. 
     The drive IC  200  is a circuit that controls display on the display device  2 . In other words, the drive IC  200  functions as the display controller  11 . The drive IC  200  may be mounted on the peripheral region GA of the substrate  21  by chip-on-glass (COG) bonding. The mounting form of the drive IC  200  is not limited thereto, and the drive IC  200  may be mounted on a flexible printed circuit board or a rigid substrate coupled to the peripheral region GA of the substrate  21  by chip-on-film (COF) bonding. 
     The cathode wiring  26  is provided in the peripheral region GA of the substrate  21 . The cathode wiring  26  is provided surrounding the pixels Pix in the display region AA and the gate driver  12  in the peripheral region GA. In other words, the cathode wiring  26  is disposed between the outermost periphery of the substrate  21  and the gate driver  12 . Cathodes of the light-emitting elements  3  are coupled to the common cathode wiring  26  and are supplied with a reference potential (e.g., a ground potential) from the cathode wiring  26 . The cathode wiring  26  may have a slit at a part and be composed of two different wires on the substrate  21 . While the cathode wiring  26  according to the present embodiment is coupled to the drive IC  200 , the present embodiment is not limited thereto. The cathode wiring  26  may be supplied with the reference potential directly from a power-supply circuit disposed on a controller substrate coupled to the substrate  21  not via the drive IC  200 . 
     As illustrated in  FIG. 5 , the pixels Pix each include the light-emitting element  3 , a second coupling electrode  23 , and a pixel circuit  28 . The light-emitting elements  3  are provided corresponding to the respective pixels Pix and include first light-emitting elements  3 R, second light-emitting elements  3 G, and third light-emitting elements  3 B that output light in different colors. The first light-emitting element  3 R outputs red light. The second light-emitting element  3 G outputs green light. The third light-emitting element  3 B outputs blue light. In the following description, the first light-emitting element  3 R, the second light-emitting element  3 G, and the third light-emitting element  3 B are simply referred to as the light-emitting elements  3  when they need not be distinguished from one another. The light-emitting elements  3  may output light in four or more different colors. 
     The pixel Pix including the first light-emitting element  3 R, the pixel Pix including the second light-emitting element  3 G, and the pixel Pix including the third light-emitting element  3 B are repeatedly arrayed in this order in the first direction Dx. In other words, the first light-emitting element  3 R, the second light-emitting element  3 G, and the third light-emitting element  3 B are repeatedly arrayed in this order in the first direction Dx. The first light-emitting elements  3 R, the second light-emitting elements  3 G, and the third light-emitting elements  3 B are each arrayed in the second direction Dy. In other words, in the example illustrated in  FIG. 5 , the light-emitting elements  3  are each disposed side by side with other light-emitting elements  3  that output light in different colors in the first direction Dx. The light-emitting elements  3  are each disposed side by side with other light-emitting elements  3  that output light in the same color in the second direction Dy. 
     The positions of the pixels Pix are not limited to those in the example illustrated in  FIG. 5 . The pixel Pix including the second light-emitting element  3 G and the pixel Pix including the third light-emitting element  3 B, for example, may be disposed side by side in the second direction Dy. The two pixels Pix disposed side by side in the second direction Dy may be disposed side by side with one pixel Pix including the first light-emitting element  3 R in the first direction Dx. In this case, the first light-emitting element  3 R and the second light-emitting element  3 G are disposed side by side in the first direction Dx, and the second light-emitting element  3 G and the third light-emitting element  3 B are disposed side by side in the second direction Dy. The first light-emitting element  3 R may be disposed side by side with the third light-emitting element  3 B in the first direction Dx. 
     As illustrated in  FIG. 5 , the second coupling electrode  23  has a larger area than the light-emitting element  3  when viewed from the direction perpendicular to the substrate  21  (hereinafter, referred to as the third direction Dz). In  FIG. 5 , the outer shape of the light-emitting element  3  corresponds to the outer shape of the lower surface. In other words, the second coupling electrode  23  has a larger area than the lower surface of the light-emitting element  3  when viewed from the third direction Dz. The second coupling electrode  23  is made of metal material that reflects light. The second coupling electrode  23  reflects, toward the input surface IS, light output from the light-emitting element  3 , reflected by the surface of the first planarizing layer  27 , or the cover member  100 , for example, and traveling toward the array substrate  20 . With this configuration, the display apparatus  1  with the detection device can increase the use efficiency of the light output from the light-emitting element  3 . Examples of the material of the second coupling electrode  23  include, but are not limited to, aluminum (Al) or aluminum alloy material, copper (Cu) or copper alloy material, silver (Ag) or silver alloy material, etc. 
     The pixel circuit  28  illustrated in  FIG. 5  is a drive circuit that drives the light-emitting element  3 . The pixel circuit  28  includes the first transistor Tr 1  and the second transistor Tr 2  (refer to  FIG. 6 ), for example, provided corresponding to the light-emitting element  3 . 
     As illustrated in  FIG. 6 , the light-emitting element  3  is provided on the array substrate  20 . The substrate  21  of the array substrate  20  has a first principal surface  21   a  and a second principal surface  21   b  opposite to the first principal surface  21   a.  The light-emitting element  3  is provided on the first principal surface  21   a  of the substrate  21 . The substrate  21  is an insulating substrate and is a glass or resin substrate or a resin film, for example. 
     The first transistors Tr 1  and the second transistors Tr 2  are provided to the respective pixels Pix. The first transistor Tr 1  and the second transistor Tr 2  are thin-film transistors (TFTs) and are n-channel metal oxide semiconductor (MOS) TFTs in this example. The first transistor Tr 1  includes a semiconductor  61 , a source electrode  62 , a drain electrode  63 , a first gate electrode  64 A, and a second gate electrode  64 B. The first gate electrode  64 A is provided on the substrate  21  with a first insulating layer  91  interposed therebetween. The first insulating layer  91  to a fourth insulating layer  94 , a sixth insulating layer  96 , and a seventh insulating layer  97  are made of inorganic insulating material, such as a silicon oxide film (SiO), a silicon nitride film (SiN), and a silicon oxynitride film (SiON). The inorganic insulating layers are not limited to single layers and may be multilayered films. 
     A second insulating layer  92  is provided on the first insulating layer  91  to cover the first gate electrode  64 A. The semiconductor  61  is provided on the second insulating layer  92 . A third insulating layer  93  is provided on the second insulating layer  92  to cover the semiconductor  61 . The second gate electrode  64 B is provided on the third insulating layer  93 . The semiconductor  61  is provided between the first gate electrode  64 A and the second gate electrode  64 B in the direction perpendicular to the substrate  21 . A channel region is formed at a part of the semiconductor  61  overlapping the first gate electrode  64 A and the second gate electrode  64 B. 
     In the example illustrated in  FIG. 6 , the first transistor Tr 1  has what is called a dual-gate structure. The first transistor Tr 1  may have a bottom-gate structure including the first gate electrode  64 A and not including the second gate electrode  64 B. Alternatively, the first transistor Tr 1  may have a top-gate structure including the second gate electrode  64 B alone and not including the first gate electrode  64 A. 
     The semiconductor  61  is made of amorphous silicon, microcrystalline oxide semiconductor, amorphous oxide semiconductor, polycrystalline silicon, low-temperature polycrystalline silicon (hereinafter, referred to as LTPS), or gallium nitride (GaN), for example. Examples of the oxide semiconductor include, but are not limited to, IGZO, ZnO, ITZO, etc. 
     The fourth insulating layer  94  is provided on the third insulating layer  93  to cover the second gate electrode  64 B. The source electrode  62  and the drain electrode  63  are provided on the fourth insulating layer  94 . The source electrode  62  according to the present embodiment is electrically coupled to the semiconductor  61  through a contact hole H 5 . The drain electrode  63  is electrically coupled to the semiconductor  61  through a contact hole H 3 . 
     A fifth insulating layer  95  is provided on the fourth insulating layer  94  to cover the source electrode  62  and the drain electrode  63 . The fifth insulating layer  95  is an organic insulating film and is a planarizing layer that planarizes unevenness formed by the first transistor Tr 1  and the various kinds of wiring. 
     The second transistor Tr 2  includes a semiconductor  65 , a source electrode  66 , a drain electrode  67 , a first gate electrode  68 A, and a second gate electrode  68 B. Detailed explanation of the second transistor Tr 2  is omitted because it has a layer structure similar to that of the first transistor Tr 1 . The drain electrode  67  of the second transistor Tr 2  is coupled to coupling wiring  69  through a contact hole H 8 . The coupling wiring  69  forms holding capacitance CS 1  using the third insulating layer  93  provided between the coupling wiring  69  and the semiconductor  61 . 
     While the semiconductor  65 , the source electrode  66 , the drain electrode  67 , the first gate electrode  68 A, and the second gate electrode  68 B are provided to the same layers as those of the semiconductor  61 , the source electrode  62 , the drain electrode  63 , the first gate electrode  64 A, and the second gate electrode  64 B, respectively, of the first transistor Tr 1 , they may be provided to different layers. 
     The gate line transistor TrG includes a semiconductor  71 , a source electrode  72 , a drain electrode  73 , a first gate electrode  74 A, and a second gate electrode  74 B. The gate line transistor TrG is a switching element included in the gate driver  12 . Detailed explanation of the gate line transistor TrG is omitted because it has a layer structure similar to that of the first transistor Tr 1 . The layers constituting the gate line transistor TrG may be provided to the same layers as those constituting the first transistor Tr 1  or to layers different therefrom. 
     The light-emitting element  3  is provided on the fifth insulating layer  95  with the sixth insulating layer  96  interposed therebetween. The seventh insulating layer  97  is provided on the sixth insulating layer  96 . The first planarizing layer  27  is provided on the seventh insulating layer  97  to cover at least side surfaces  3   a  of the light-emitting element  3 . The light-emitting element  3  has what is called a face-up structure in which an anode terminal  23   t  is provided at the lower part and a cathode terminal  22   t  is provided at the upper part. The second coupling electrode  23  is an anode electrode coupled to the anode terminal  23   t  of the light-emitting element  3 . The second coupling electrode  23  is provided on the sixth insulating layer  96  and is coupled to a third coupling electrode  24  through a contact hole H 7 . The third coupling electrode  24  is provided on the fifth insulating layer  95  and is coupled to the drain electrode  63  through a contact hole H 2 . As described above, the second coupling electrode  23  and the third coupling electrode  24  couple the anode terminal  23   t  of the light-emitting element  3  and the drain electrode  63  of the first transistor Tr 1 . A fourth coupling electrode  25  is provided to the same layer as that of the third coupling electrode  24  and is coupled to the source electrode  62  through a contact hole H 4 . 
     The fourth coupling electrode  25  extends on the fifth insulating layer  95  and faces the second coupling electrode  23  with the sixth insulating layer  96  interposed therebetween in the third direction Dz. As a result, capacitance is formed between the second coupling electrode  23  and the fourth coupling electrode  25 . The capacitance formed between the second coupling electrode  23  and the fourth coupling electrode  25  is used as holding capacitance of the pixel circuit  28 . As described above, the second coupling electrode  23  serves not only as a reflective plate that reflects light but also as an electrode of capacitance CS 2 . 
     The cathode terminal  22   t  of the light-emitting element  3  is exposed from the surface of the first planarizing layer  27 . A first coupling electrode  22  is provided on the first planarizing layer  27  and is coupled to the cathode terminals  22   t  of a plurality of light-emitting elements  3 . The first coupling electrode  22  is a cathode electrode coupled to the cathode terminals  22   t  of the light-emitting elements  3 . The first coupling electrode  22  extends from the display region AA to the peripheral region GA. The first coupling electrode  22  is electrically coupled to the cathode wiring  26  at the bottom of a contact hole H 1  formed in the first planarizing layer  27  and the fifth insulating layer  95 . As a result, the cathodes of the respective light-emitting elements  3  are electrically coupled to the cathode wiring  26  via the first coupling electrode  22 . 
     In the display device  2 , the array substrate  20  includes the layers from the substrate  21  to the second coupling electrode  23 . The array substrate  20  does not include the first planarizing layer  27 , the light-emitting element  3 , or the first coupling electrode  22 . 
     As illustrated in  FIGS. 3 and 6 , the detection device  5  is provided on the display device  2 . The detection device  5  includes the sensor substrate  53  and the first electrode  54  provided on the sensor substrate  53 . As illustrated in  FIG. 6 , the sensor substrate  53  and the first electrode  54  are provided facing the first principal surface  21   a  of the substrate  21  with the light-emitting elements  3  interposed therebetween. The sensor substrate  53  is bonded on the first coupling electrode  22  of the display device  2  with an adhesive layer  99  interposed therebetween. The adhesive layer  99  is an optical clear adhesive (OCA), for example. The sensor substrate  53  is a translucent film-like resin, for example. The sensor substrate  53  may be made of any material deformable by force applied to the input surface IS and may be a glass substrate, for example. 
     As illustrated in  FIG. 7 , the first electrode  54  includes a plurality of drive electrodes Tx and a plurality of detection electrodes Rx 1 . Capacitance is formed between the drive electrodes Tx and the detection electrodes Rx 1 . The drive electrodes Tx and the detection electrodes Rx 1  are provided in a detection region GA of the detection device  5 . The detection region GA of the detection device  5  according to the present embodiment overlaps the display region AA of the display device  2 . In other words, the drive electrodes Tx and the detection electrodes Rx 1  are disposed overlapping the light-emitting elements  3  of the display device  2 . 
     The drive electrodes Tx each include a plurality of first electrode parts  55  and a plurality of first couplers  56 . The first electrode parts  55  are arrayed in the first direction Dx in a manner separated from each other. The first electrode parts  55  disposed side by side in the first direction Dx are coupled by the first coupler  56 . The drive electrodes Tx extend in the first direction Dx and are arrayed in the second direction Dy. 
     The detection electrodes Rx 1  each include a plurality of second electrode parts  57  and a plurality of second couplers  58 . The second electrode parts  57  are arrayed in the second direction Dy in a manner separated from each other. The second electrode parts  57  disposed side by side in the second direction Dy are coupled by the second coupler  58 . The detection electrodes Rx 1  extend in the second direction Dy and are arrayed in the first direction Dx. The second coupler  58  intersects the first coupler  56  in planar view. 
     The first electrode parts  55 , the second electrode parts  57 , the first couplers  56 , and the second couplers  58  are made of translucent conductive material, such as indium tin oxide (ITO). At least any one of the first electrode parts  55 , the second electrode parts  57 , the first couplers  56 , and the second couplers  58  may be a plurality of metal thin wires made of metal material or alloy material having the materials described above as a main component. If the first electrode parts  55  and the second electrode parts  57  are made of ITO, for example, they may each have a rectangular tile-like shape. If the first electrode parts  55  and the second electrode parts  57  are made of metal thin wires, they may each have a mesh shape having a plurality of openings. 
     The drive electrodes Tx and the detection electrodes Rx 1  are provided to the same sensor substrate  53 . The first electrode parts  55  and the second electrode parts  57  may be provided to different layers with an insulating layer interposed therebetween or to the same layer. If the first electrode parts  55  and the second electrode parts  57  are provided to the same layer, the electrode parts are each coupled by the second coupler  58  and the first coupler  56  formed like bridges with an insulating layer interposed therebetween at the intersection of the second coupler  58  and the first coupler  56 . 
     The drive electrode Tx is coupled to a terminal area  201  by wiring L 1 . The detection electrode Rx 1  is coupled to the terminal area  201  by wiring L 2 . The terminal area  201  includes a plurality of terminals electrically coupled to a first coupling member  110 . 
     As illustrated in  FIG. 8 , the first electrode part  55  of the drive electrode Tx is provided overlapping a plurality of pixels Pix. While  FIG. 8  illustrates the relation between the drive electrode Tx and the light-emitting elements  3 , the explanation with reference to  FIG. 8  is also applicable to the configuration of the second electrode part  57  of the detection electrode Rx 1 . The first electrode part  55  of the drive electrode Tx has a plurality of openings  55   a.  The openings  55   a  are each formed at a part overlapping the light-emitting element  3  in the pixel Px. The part not provided with the light-emitting element  3  in the pixel Pix overlaps the drive electrode Tx. With this configuration, light from the light-emitting element  3  passes through the opening  55   a  and is output from the input surface IS. Consequently, the display apparatus  1  with the detection device can increase the use efficiency of light. While one opening  55   a  faces the light-emitting elements  3  of a plurality of pixels Pix disposed side by side in  FIG. 8 , the present embodiment is not limited thereto. Alternatively, different openings may face the respective light-emitting elements  3 . 
     As illustrated in  FIG. 7 , the detection device  5  includes the second electrode Rx 2 . The second electrode Rx 2  is indicated by an alternate long and two short dashes line in  FIG. 7 . The second electrode Rx 2  is provided over the whole surface of the detection region DA overlapping the drive electrodes Tx and the detection electrodes Rx 1 . In other words, the second electrode Rx 2  is provided in a region overlapping all the light-emitting elements  3  of the display device  2 . 
     As illustrated in  FIGS. 3 and 6 , the second electrode Rx 2  faces the first electrode  54  with the array substrate  20  and the light-emitting elements  3  interposed therebetween. As illustrated in  FIG. 6 , the second electrode Rx 2  is provided on the second principal surface  21   b  of the substrate  21 . A protective layer  98  that protects the second electrode Rx 2  is provided on the lower surface of the second electrode Rx 2 . As a result, capacitance is formed between the second electrode Rx 2  and at least one of the drive electrodes Tx and the detection electrodes Rx 1 . The second electrode Rx 2  and at least one of the drive electrodes Tx and the detection electrodes Rx 1  serve as the force detector  52  illustrated in  FIGS. 1 and 2 . 
     The second electrode Rx 2  is provided opposite to the input surface IS across the light-emitting elements  3 . With this configuration, the second electrode Rx 2  may be made of translucent conductive material, such as ITO, metal material containing Al, Cu, or Ag, for example, or alloy material having these materials as a main component. 
     The second electrode Rx 2  may be a reflection suppression layer that suppresses reflection of light. This configuration can prevent light output from the light-emitting element  3  and reflected by the cover member  100  or the first electrode  54  from being reflected again by the second electrode Rx 2 . As a result, the display apparatus  1  with the detection device can prevent light output from the light-emitting element  3  from being reflected a plurality of times in the display apparatus  1  with the detection device. Consequently, the display apparatus  1  with the detection device can suppress color mixture of light between the pixels Pix that are disposed side by side and display different colors. 
     The material of the second electrode Rx 2  is metal having high optical density (OD). Examples of the metal having a high OD value include, but are not limited to, molybdenum (Mo), chromium (Cr), tungsten (W), etc. The second electrode Rx 2  may be made of alloy material having these metal materials as a main component. Alternatively, the second electrode Rx 2  may be made of conductive resin containing carbon particles, such as carbon black and graphite. Still alternatively, the second electrode Rx 2  may have a multilayered structure including metal material containing Al, Cu, or Ag, for example, and a blackened film. Examples of the blackened film include, but are not limited to, oxide of iron (magnetite triiron tetraoxide), complex oxide of Cu and Cr, complex oxide of Cu, Cr, and zinc (Zn), etc. 
     As illustrated in  FIG. 6 , the first coupling member  110  is coupled to the sensor substrate  53  and is electrically coupled to the first electrode  54  (the drive electrodes Tx and the detection electrodes Rx 1 ). The first coupling member  110  is a flexible printed circuit board, for example. The first coupling member  110  has a main part  111 A and a branch part  111 B. The main part  111 A is coupled to the first electrode  54  via the terminal area  201 . The branch part  111 B branches off from the main part  111 A and is electrically coupled to the second electrode Rx 2 . The first coupling member  110  is provided with a detection IC  300  (detection controller  4 ) by chip-on-film (COF) bonding. The detection IC  300  may be mounted on another control substrate coupled to the first coupling member  110 . The first coupling member  110  may be a rigid substrate or a rigid flexible substrate. A second coupling member  211  is coupled to the substrate  21  and is electrically coupled to the drive IC  200 . The first coupling member  110  and the second coupling member  211  are electrically coupled. 
     The touch detection signals Vdet 1  detected by the detection device  5  are output from the detection electrodes Rx 1  to the detection IC  300  via the first coupling member  110 . The force detection signals Vdet 2  detected by the detection device  5  are output from the second electrode Rx 2  to the detection IC  300  via the first coupling member  110 . 
     The substrate  21  according to the present embodiment is a glass substrate. As illustrated in  FIG. 3 , the display apparatus  1  with the detection device is incorporated in a housing  210 . The housing  210  supports the second principal surface  21   b  of the substrate  21 . This configuration prevents deformation of the substrate  21  when force is applied to the input surface IS. 
     By contrast, the cover member  100  is a glass substrate or a resin film thinner than the substrate  21 . The cover member  100  is more likely to be deformed by force applied to the input surface IS than the substrate  21 . The sensor substrate  53  is a film material made of rein, such as acrylic resin, epoxy resin, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and cycloolefin polymer (COP). These materials are more likely to be deformed than the material (glass) of the substrate  21  when the same force is applied thereto. As a result, the sensor substrate  53  is more likely to be deformed by force applied to the input surface IS than the substrate  21 . 
     The first planarizing layer  27  has lower hardness than the substrate  21 . Examples of the material of the first planarizing layer  27  include, but are not limited to, acrylic resin, polysiloxane, polysilazane, epoxy resin, silicone resin, etc. These materials are more likely to be deformed than the material (glass) of the substrate  21  when the same force is applied thereto. 
     With this configuration, the cover member  100  and the sensor substrate  53  are deformed and curved toward the substrate  21 , and the first planarizing layer  27  is elastically deformed at a part to which force is applied on the input surface IS. The amount of deformation of the substrate  21  is smaller than that of the cover member  100 , the sensor substrate  53 , and the first planarizing layer  27 . The distance between the second electrode Rx 2  and both the drive electrodes Tx and the detection electrodes Rx 1  changes depending on the force applied to the input surface IS. As a result, the capacitance between the second electrode Rx 2  and both the drive electrodes Tx and the detection electrodes Rx 1  changes. The second electrode Rx 2  outputs signals corresponding to the distance between the second electrode Rx 2  and both the drive electrodes Tx and the detection electrodes Rx 1  as the force detection signals Vdet 2 . The force detection controller  48  can detect force applied to the input surface IS based on the force detection signals Vdet 2 . The force detection controller  48  may perform force detection by the mutual capacitive system or the self-capacitive system. 
     The resistance of the first electrode  54  (the drive electrodes Tx and the detection electrodes Rx 1 ) is  300  S 2 , for example, and is sufficiently lower than the resistance of the light-emitting element  3  (e.g., approximately 10 13  Ω) when it is turned off (not emitting light). When static electricity enters the input surface IS, it travels in the first electrode  54  because the first electrode  54  is provided closer to the input surface IS with respect to the light-emitting elements  3 . The static electricity flows to the power source and the fixed potential, such as GND, via the first coupling member  110  and is discharged. Consequently, the display apparatus  1  with the detection device can prevent static electricity from entering the light-emitting elements  3 . 
     The second electrode Rx 2  may be made of metal material having higher conductivity than the substrate  21 . When static electricity enters through the second principal surface  21   b,  it travels in the second electrode Rx 2 . The static electricity flows to the power source and the fixed potential, such as GND, via the first coupling member  110  and is discharged. With the first electrode  54  and the second electrode Rx 2 , the display apparatus  1  with the detection device can prevent the light-emitting elements  3  from being damaged by static electricity. 
       FIG. 9  is a sectional view of the light-emitting element according to the first embodiment. As illustrated in  FIG. 9 , the light-emitting element  3  includes a plurality of partial light-emitting elements  3 s, a protective layer  39 , a p-type electrode  37 , and an n-type electrode  38 . The protective layer  39  covers the partial light-emitting elements  3 s. The partial light-emitting elements  3 s have a columnar shape and are provided between the p-type electrode  37  and the n-type electrode  38 . The partial light-emitting elements  3 s each include an n-type cladding layer  33 , an active layer  34 , and a p-type cladding layer  35 . The n-type electrode  38  is electrically coupled to the n-type cladding layer  33 . The p-type electrode  37  is electrically coupled to the p-type cladding layer  35 . The p-type cladding layer  35 , the active layer  34 , and the n-type cladding layer  33  are layered in order on the p-type electrode  37 . 
     The n-type cladding layer  33 , the active layer  34 , and the p-type cladding layer  35  are light-emitting layers and are made of a compound semiconductor, such as gallium nitride (GaN) and aluminum indium phosphorus (AlInP). 
     The n-type electrode  38  is made of translucent conductive material, such as ITO. The n-type electrode  38  includes the cathode terminal  22   t  of the light-emitting element  3  and is coupled to the first coupling electrode  22 . The p-type electrode  37  includes the anode terminal  23   t  of the light-emitting element  3  and includes a Pt layer and a thick Au layer produced by plating. The anode terminal  23   t  (thick Au layer) is coupled to the second coupling electrode  23  on a placement surface  23   a.    
     The protective layer  39  is a spin on glass (SOG), for example. The side surfaces of the protective layer  39  correspond to the side surfaces  3   a  of the light-emitting element  3 . The first planarizing layer  27  is provided in contact with the side surfaces of the protective layer  39  between the first coupling electrode  22  and the seventh insulating layer  97 . The configuration of the light-emitting element  3  illustrated in  FIG. 9  is given by way of example only, and the light-emitting element  3  may have what is called a face-down structure, for example. 
       FIG. 10  is a timing waveform chart of exemplary operations of the display apparatus with the detection device according to the first embodiment.  FIG. 10  illustrates a case where display by the display device  2  and touch detection and force detection by the detection device  5  are synchronously performed as exemplary operations of the display apparatus  1  with the detection device. As illustrated in  FIG. 10 , the display apparatus  1  with the detection device performs display, touch detection, and force detection by dividing these operations into a plurality of sections in one frame period IF of the display device  2 , that is, a time required to display video information of one screen. The display apparatus  1  with the detection device performs display periods, touch detection periods, and force detection periods in a time-division manner. The display apparatus  1  with the detection device may perform display, touch detection, and force detection in any division manner. 
     When a control signal TS-VD is turned on (high level voltage), one frame period  1 F is started. A control signal TS-HD is repeatedly turned on (high level voltage) and off (low level voltage) in one frame period ( 1 F). In a period when the control signal TS-HD is turned on, touch detection or force detection is performed. In a period when the control signal TS-HD is turned off, display is performed. 
     One frame period  1 F includes a plurality of display periods Pd N  (N=1, 2, . . . , n), a plurality of touch detection periods Pt M  (M=1, 2, . . . , m), and a plurality of force detection periods Pf 1 , Pf 2 , and Pf 3 . These periods are alternately arranged on a time axis like the force detection period Pf 1 , the display period Pd 1 , the touch detection period Pt 1 , the display period Pd 2 , the touch detection period Pt 2 , the display period Pd 3 , . . . . 
     The display controller  11  supplies the pixels signals Vpix to the pixels Pix (refer to  FIG. 4 ) selected in each display period Pd N  via the gate driver  12  and the source driver  13 .  FIG. 10  illustrates selection signals SELR/G/B for selecting the three colors of RGB and image signals SIGn for the respective colors. The corresponding pixels Pix are selected based on the selection signals SELR/G/B, and the image signals SIGn for the respective colors are supplied to the selected pixels Pix. An image obtained by dividing the video signals Vdisp of one screen into n pieces is displayed in each display period Pd N , and video information of one screen is displayed through the display periods Pd 1 , Pd 2 , . . . , Pd n . In the display period PdN, the drive electrodes Tx and the detection electrodes Rx 1  of the detection device  5  are not supplied with signals, such as the touch drive signals Vtxd, and are coupled to the ground potential, for example. Alternatively, the drive electrodes Tx and the detection electrodes Rx 1  may be in a floating state where no voltage signal is supplied thereto and their electric potential is not fixed. 
     In the touch detection period Pt M , the touch detection controller  40  outputs the control signals to the first drive electrode driver  14 . The first drive electrode driver  14  supplies the touch drive signals Vtxd to the drive electrodes Tx. Capacitance between the drive electrodes Tx and the detection electrodes Rx 1  changes due to contact or proximity of the object to be detected OBJ with or to the input surface IS. The detection electrodes Rx 1  output the touch detection signals Vdet 1  corresponding to the change in capacitance between the drive electrodes Tx and the detection electrodes Rx 1 . 
     The following describes a case where the detection device  5  performs force detection by the self-capacitive system. In the force detection periods Pf 1 , Pf 2 , and Pf 3 , the force detection controller  48  outputs the control signals to the second drive electrode driver  15 . The second drive electrode driver  15  supplies the second drive signals Vd to the second electrode Rx 2 . The second electrode Rx 2  outputs the force detection signals Vdet 2  corresponding to the change in capacitance between the drive electrodes Tx and the second electrode Rx 2 . The force detection controller  48  performs arithmetic processing for calculating force input to the input surface IS based on the force detection signals Vdet 2  supplied from the second electrode Rx 2 . In the force detection periods Pf 1 , Pf 2 , and Pf 3 , the second drive electrode driver  15  supplies guard signals Vsg 1  to the detection electrodes Rx 1 . While the guard signal Vsg 1  preferably has a waveform having the same amplitude and the same frequency as those of the second drive signal Vd, it may have different amplitude. 
     The detection device  5  may perform force detection by the mutual capacitive system. To perform force detection by the mutual capacitive system, the force detection controller  48  outputs the control signals to the second drive electrode driver  15  in the force detection periods Pf 1 , Pf 2 , and Pf 3 . The second drive electrode driver  15  supplies the second drive signals Vd to the drive electrodes Tx. The second electrode Rx 2  outputs the force detection signals Vdet 2  corresponding to the change in capacitance between the drive electrodes Tx and the second electrode Rx 2  based on the mutual capacitive system. In the force detection periods Pf 1 , Pf 2 , and Pf 3 , the second drive electrode driver  15  supplies the guard signals Vsg 1  to the detection electrodes Rx 1  not supplied with the second drive signals Vd out of the drive electrodes Tx and the detection electrodes Rx 1 . This mechanism can prevent capacitive coupling between the drive electrodes Tx and the detection electrodes Rx 1 . Alternatively, the second drive electrode driver  15  may supply the second drive signals Vd to the detection electrodes Rx 1  and supply the guard signals Vsg 1  to the drive electrodes Tx. 
     The display apparatus  1  with the detection device may asynchronously perform display by the display device  2  and touch detection and force detection by the detection device  5 . In the asynchronous operation, the detection device  5  can perform detection in the same period as the period when the display device  2  performs display. In this case, the detection device  5  may perform touch detection and force detection in a time-division manner. 
     First Modification 
       FIG. 11  is a plan view schematically illustrating the detection device according to a first modification of the first embodiment.  FIG. 12  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to the first modification of the first embodiment. In the description below, the components described in the embodiment above are denoted by like reference numerals, and explanation thereof is omitted. 
     As illustrated in  FIG. 11 , a coupling terminal  201 A is provided in the peripheral region GA of the sensor substrate  53 . The coupling terminal  201 A is electrically coupled to the terminal area  201 . As illustrated in  FIG. 12 , a display apparatus  1 A with the detection device has a through hole HA passing through the display device  2 . The through hole HA is formed in the peripheral region GA and passes through the substrate  21 , the insulating layers, the first planarizing layer  27 , the adhesive layer  99 , and the sensor substrate  53 . 
     The through hole HA can be formed by irradiation with laser light from below the second principal surface  21   b  of the substrate  21 . The laser light source is a device that can perform laser drilling on glass or organic material and is a carbon dioxide gas laser device or an excimer laser device, for example. The through hole HA may be formed not only by irradiation with laser light but also by appropriately performing other processes, such as etching. 
     A conductor  112  is provided in the through hole HA. The upper part of the conductor  112  is in contact with the coupling terminal  201 A, the lower part of the conductor  112  is in contact with the second electrode Rx 2 . The conductor  112  is made of highly conductive metal material, such as Cu and Ag, or alloy material having these metal materials as a main component. With this configuration, the second electrode Rx 2  is electrically coupled to the first coupling member  110  by the coupling terminal  201 A, the through hole HA, and the conductor  112 . The display apparatus  1 A with the detection device according to the present modification includes the first coupling member  110  having a simpler structure and can be manufactured without requiring the process for coupling the branch part  111 B of the first coupling member  110  and the second electrode Rx 2 . In other words, the display apparatus  1 A with the detection device does not require the branch part  111 B of the first coupling member  110  covering the side surface of the substrate  21  in the second direction Dy. As a result, the display apparatus  1 A with the detection device can be downsized in the second direction Dy. Compared with a case where the first electrode  54  and the second electrode Rx 2  are provided with the respective first coupling members  110 , the display apparatus  1 A with the detection device can prevent the first coupling members  110  from coming into contact with each other. Consequently, the display apparatus  1 A with the detection device requires a smaller space for housing the first coupling member  110  therein. 
     The through hole HA is not necessarily filled up with the conductor  112 . The conductor  112  may be provided at least along the inner circumferential surface of the through hole HA in the thickness direction in an electrically connectable manner. 
     Second Modification 
       FIG. 13  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a second modification of the first embodiment. Similarly to the configuration illustrated in  FIG. 11 , a display apparatus  1 B with the detection device includes the coupling terminal  201 A in the peripheral region GA of the sensor substrate  53 . As illustrated in  FIG. 13 , the display apparatus  1 B with the detection device includes a conductor  113  provided to the side surface of the display device  2 . The conductor  113  covers the end of the second principal surface  21   b  of the substrate  21  and is electrically coupled to the second electrode Rx 2 . The conductor  113  is provided to the side surfaces of the substrate  21 , the insulating layers, the first planarizing layer  27 , the adhesive layer  99 , and the sensor substrate  53  and is electrically coupled to the coupling terminal  201 A. 
     The conductor  113  can be made of a conductive paste containing metal material, such as Cu and Ag. The conductor  113  can be applied and formed using a dispenser, for example. The dispenser or the like discharges the conductive paste, thereby forming the conductor  113  along the side surface of the display device  2 . The display apparatus  1 B with the detection device can be manufactured at a lower cost without requiring the processing for boring the through hole HA in the substrate  21  compared with the first modification. 
     Third Modification 
       FIG. 14  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a third modification of the first embodiment. A display apparatus  1 C with the detection device includes a second planarizing layer  99 A. The second planarizing layer  99 A is provided on the first coupling electrode  22 . In other words, the second planarizing layer  99 A is provided between the first planarizing layer  27  and the sensor substrate  53  and covers the upper surface of the light-emitting element  3 . The second planarizing layer  99 A is made of resin material more likely to be deformed than the first planarizing layer  27  when force is applied to the input surface IS. If the elastic modulus of the first planarizing layer  27  is approximately 20 MPa, for example, the second planarizing layer  99 A has an elastic modulus of approximately 200 MPa. 
     Providing a plurality of resin layers between the first electrode  54 , the substrate  21 , and the second electrode Rx 2  makes the members, such as the cover member  100 , the first electrode  54 , and the sensor substrate  53 , more likely to be deformed by force applied to the input surface IS. Consequently, the display apparatus  1 C with the detection device can perform force detection with higher accuracy. 
     Fourth Modification 
       FIG. 15  is a plan view schematically illustrating the detection device according to a fourth modification of the first embodiment. In a detection device  5 A according to the present modification, a plurality of detection electrodes Rx 1 A are disposed in a matrix (row-column configuration) in the detection region DA. The detection electrodes Rx 1 A also serve as the drive electrodes Tx. The detection electrodes Rx 1 A are each electrically coupled to the terminal area  201  via wiring L 3 . 
     The detection device  5 A according to the present modification performs touch detection by the self-capacitive system. In other words, the first drive electrode driver  14  supplies the touch drive signals Vtxd to the detection electrodes Rx 1 A in the touch detection period Pt M . The detection electrodes Rx 1 A have a change in capacitance by the presence of the object to be detected OBJ in contact with or in proximity to the input surface IS. The detection electrodes Rx 1 A output the touch detection signals Vdet 1  corresponding to the change in capacitance. 
     To perform force detection by the mutual capacitive system, the second drive electrode driver  15  supplies the second drive signals Vd to the detection electrodes Rx 1 A similarly to the operations described with reference to  FIG. 10 . The second electrode Rx 2  outputs the force detection signals Vdet 2  corresponding to the change in capacitance between the detection electrodes Rx 1 A and the second electrode Rx 2  based on the mutual capacitive system. In the force detection periods Pf 1 , Pf 2 , and Pf 3 , the second drive electrode driver  15  may supply the guard signals Vsg 1  to the detection electrodes Rx 1 A not supplied with the second drive signals Vd out of the detection electrodes Rx 1 . 
     Second Embodiment 
       FIG. 16  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a second embodiment.  FIG. 17  is a sectional view of the light-emitting element according to the second embodiment. In a display apparatus  1 D with the detection device according to the present embodiment, a light-emitting element  3 A has what is called a face-down structure. In other words, the anode terminal  23   t  and the cathode terminal  22   t  of the light-emitting element  3 A are provided on the substrate  21 . As illustrated in  FIG. 16 , the first coupling electrode  22  and the second coupling electrode  23  are provided between the substrate  21  and the light-emitting element  3 A. The first coupling electrode  22  is coupled to the cathode terminal  22   t  of the light-emitting element  3 A. The first coupling electrode  22  is electrically coupled to the cathode wiring  26  via wiring provided on the sixth insulating layer  96 . The second coupling electrode  23  is coupled to the anode terminal  23   t  of the light-emitting element  3 A. The first planarizing layer  27  is provided on the seventh insulating layer  97  to cover the side surfaces  3   a  and the upper surface of the light-emitting element  3 A. 
     In the light-emitting element  3 A, as illustrated in  FIG. 17 , a buffer layer  32 , an n-type cladding layer  33 , an active layer  34 , a p-type cladding layer  35 , and a p-type electrode  36  are layered in order on a translucent substrate  31 . In the light-emitting element  3 A, the translucent substrate  31  is provided on the upper side, and the p-type electrode  36  is provided on the lower side. The surface of the n-type cladding layer  33  facing a first coupling electrode  22  has a region exposed from the active layer  34 . This region is provided with an n-type electrode  38 . 
     The p-type electrode  36  is made of material having metallic luster that reflects light from the light-emitting layer. The p-type electrode  36  includes the anode terminal  23   t  and is coupled to the second coupling electrode  23  serving as the anode electrode with a bump  39 A interposed therebetween. The n-type electrode  38  includes the cathode terminal  22   t  and is coupled to the first coupling electrode  22  serving as the cathode electrode with a bump  39 B interposed therebetween. In the light-emitting element  3 A, the p-type cladding layer  35  and the n-type cladding layer  33  are not directly bonded, and another layer (light-emitting layer (active layer  34 )) is provided therebetween. With this configuration, carriers, such as electrons and holes, can be concentrated in the light-emitting layer, thereby efficiently recombining the carriers (emitting light). The light-emitting layer may have a multi-quantum well structure (MQW structure) in which well layers and barrier layers composed of several atomic layers are cyclically layered for higher efficiency. The display apparatus  1 D with the detection device including the light-emitting element  3 A having the face-down structure can satisfactorily perform force detection similarly to the first embodiment. 
     Third Embodiment 
       FIG. 18  is a sectional view of a schematic sectional structure of the display apparatus with the detection device according to a third embodiment. In a display apparatus  1 E with the detection device according to the present embodiment, the detection device  5  includes the sensor substrate  53  and a detection electrode Rx 1 B provided to the sensor substrate  53  as illustrated in  FIG. 18 . The detection device  5  includes the detection electrode Rx 1 B alone as the first electrode  54  and does not include the drive electrodes Tx. The detection electrode Rx 1 B is continuously provided over the whole surface of the detection region DA. In this case, the detection device  5  does not perform touch detection, and the display apparatus  1 E with the detection device does not necessarily include the touch detection controller  40 . As illustrated in  FIG. 8 , the first electrode  54  may have the openings  55   a  in the regions facing the light-emitting elements  3 . 
     The detection electrode Rx 1 B is provided facing the second electrode Rx 2  with the array substrate  20 , the light-emitting elements  3 , and the first planarizing layer  27  interposed therebetween. With this configuration, a detection device  5 B can perform at least force detection similarly to the examples described above. The display apparatus  1 E with the detection device can be used for wearable devices and smartwatches, for example. 
     While exemplary embodiments according to the present disclosure have been described, the embodiments are not intended to limit the disclosure. The contents disclosed in the embodiments are given by way of example only, and various changes may be made without departing from the spirit of the present disclosure. Appropriate changes made without departing from the spirit of the present disclosure naturally fall within the technical scope of the disclosure. At least one of various omissions, substitutions, and changes of the components may be made without departing from the gist of the embodiments above and the modifications thereof.