Patent Publication Number: US-2022215784-A1

Title: Method for repairing display device and display device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of International Patent Application No. PCT/JP2020/030487 filed on Aug. 7, 2020 which designates the United States, incorporated herein by reference, and which claims the benefit of priority from Japanese Patent Application No. 2019-173057 filed on Sep. 24, 2019, incorporated herein by reference. 
    
    
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a method for repairing a display device and the display device. 
     2. Description of the Related Art 
     Display devices including micro-sized light-emitting diodes (micro LEDs) serving as display elements have recently been attracting attention (refer to Japanese Patent Application Laid-open Publication No. 2017-529557 (JP-A-2017-529557), for example). The light-emitting diodes are coupled to an array substrate (driver backplane in JP-A-2017-529557), and the array substrate includes a pixel circuit (electronic control circuit in JP-A-2017-529557) that drives the light-emitting diodes. 
     Display devices including light-emitting diodes, however, are difficult to manufacture in mounting the light-emitting diodes on a substrate, for example, because of the small size of the light-emitting diodes and tend to have defects in the light-emitting diodes. If display devices having defects are not used by being discarded, for example, the yield decreases. For this reason, there is a need to appropriately make display devices including light-emitting diodes usable if they have defects. 
     In view of the disadvantages described above, an object of the present invention is to provide a method for repairing a display device that can be appropriately made usable if it has defects and the display device. 
     SUMMARY 
     A method according to an embodiment for repairing a display device is disclosed. The display device includes a plurality of inorganic light emitters arrayed in a matrix (row-column configuration), and a counter electrode provided in a traveling direction of light emitted from the inorganic light emitters and coupled to the inorganic light emitters. The method includes steps of detecting a defective inorganic light emitter serving as one of the inorganic light emitters and having a defect, and removing a target portion of the counter electrode by irradiating the target portion with light while leaving the defective inorganic light emitter unremoved, the target portion including a portion between a portion coupled to the defective inorganic light emitter and a portion coupled to an inorganic light emitter adjacently disposed with the defective inorganic light emitter. 
     A display device according to an embodiment of the present disclosure includes a plurality of inorganic light emitters arrayed in a matrix (row-column configuration), and a counter electrode provided in a traveling direction of light emitted from the inorganic light emitters and coupled to the inorganic light emitters. The counter electrode has an opening at a portion provided with a first inorganic light emitter and a portion provided with a second inorganic light emitter adjacently disposed with the first inorganic light emitter when viewed from the traveling direction of light. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a plan view of an exemplary configuration of a display device according to the present embodiment; 
         FIG. 2  is a plan view of a plurality of pixels; 
         FIG. 3  is a circuit diagram of an exemplary configuration of a pixel circuit of the display device; 
         FIG. 4  is a sectional view along line IV-IV′ of  FIG. 1 ; 
         FIG. 5  is a sectional view of an exemplary configuration of an inorganic light emitter according to the present embodiment; 
         FIG. 6  is a schematic of an example of repairing the display device; 
         FIG. 7  is a schematic of the example of repairing the display device; 
         FIG. 8  is a schematic of the example of repairing the display device; 
         FIG. 9  is a schematic of another example of repairing the display device; 
         FIG. 10  is a schematic of the example of repairing the display device; 
         FIG. 11  is a flowchart for explaining a method for repairing the display device according to the present embodiment; 
         FIG. 12  is a view for explaining a specific example of repairing the display device; 
         FIG. 13  is a view for explaining a specific example of repairing the display device; 
         FIG. 14  is a view for explaining a specific example of repairing the display device; and 
         FIG. 15  is a view for explaining a specific example of repairing the display device. 
     
    
    
     DETAILED DESCRIPTION 
     Embodiment of the present invention is described below with reference to the accompanying drawings. What is disclosed herein is given by way of example only, and appropriate modifications made without departing from the spirit of the present invention and easily conceivable by those skilled in the art naturally fall within the scope of the present invention. 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 invention. In the present specification and the drawings, components similar to those previously described with reference to previous drawings are denoted by like reference numerals, and detailed explanation thereof may be appropriately omitted. 
     Configuration of the Display Device 
       FIG. 1  is a plan view of an exemplary configuration of a display device according to the present embodiment. As illustrated in  FIG. 1 , a display device  1  includes an array substrate  2 , pixels Pix, drive circuits  12 , a drive integrated circuit (IC)  210 , and cathode wiring  60 . The array substrate  2  is a drive circuit substrate that drives the pixels Pix and is also called a backplane or an active matrix substrate. The array substrate  2  includes a substrate  10 , a plurality of transistors, a plurality of capacitances, various kinds of wiring, and other components. 
     As illustrated in  FIG. 1 , the display device  1  has a display region AA and a peripheral region GA. The display region AA is a region provided with the pixels Pix and displays an image. The peripheral region GA does not overlap the pixels Pix and is positioned 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  10 . The first direction Dx and the second direction Dy are parallel to a first surface  10   a  (refer to  FIG. 4 ) of the substrate  10  of the array substrate  2 . 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. The third direction Dz corresponds to the normal direction of the substrate  10 , for example. In the following description, planar view indicates the positional relation viewed from the third direction Dz. 
     The drive circuits  12  are provided in the peripheral region GA of the substrate  10 . The drive circuits  12  are circuits that drive a plurality of gate lines (e.g., a light emission control scanning line BG, a reset control scanning line RG, an initialization control scanning line IG, and a writing control scanning line SG (refer to  FIG. 3 )) based on various control signals received from the drive IC  210 . The drive circuits  12  sequentially or simultaneously select a plurality of gate lines and supply gate drive signals to the selected gate lines. As a result, the drive circuits  12  select a plurality of pixels Pix coupled to the gate lines. 
     The drive IC  210  is a circuit that controls display on the display device  1 . The drive IC  210  may be mounted in the peripheral region GA of the substrate  10  as chip on glass (COG). The mounting form of the drive IC  210  is not limited thereto, and the drive IC  210  may be mounted on a wiring substrate coupled to the peripheral region GA of the substrate  10  as chip on film (COF). The wiring substrate coupled to the substrate  10  is flexible printed circuits or a rigid substrate, for example. 
     The cathode wiring  60  is provided in the peripheral region GA of the substrate  10 . The cathode wiring  60  is provided surrounding the pixels Pix in the display region AA and the drive circuits  12  in the peripheral region GA. Cathodes (cathode electrodes  114  (refer to  FIG. 4 )) of a plurality of inorganic light emitters  100  (refer to  FIG. 4 ) are coupled to the common cathode wiring  60  and are supplied with a fixed potential (e.g., a ground potential). More specifically, the cathode electrode  114  of the inorganic light emitter  100  is coupled to the cathode wiring  60  via a counter cathode electrode  90   e  on the array substrate  2 . A cathode wiring  14  may partially have a slit and be provided as two different wires on the substrate  10 . 
       FIG. 2  is a plan view of a plurality of pixels. As illustrated in  FIG. 2 , one pixel Pix includes a plurality of pixels  49 . The pixel Pix includes a first pixel  49 R, a second pixel  49 G, and a third pixel  49 B, for example. The first pixel  49 R displays the primary color of red as a first color. The second pixel  49 G displays the primary color of green as a second color. The third pixel  49 B displays the primary color of blue as a third color. As illustrated in  FIG. 2 , the first pixel  49 R and the third pixel  49 B are adjacently disposed in the first direction Dx in one pixel Pix. The second pixel  49 G and the third pixel  49 B are adjacently disposed in the second direction Dy. The first color, the second color, and the third color are not limited to red, green, and blue, respectively, and may be any desired colors, such as complementary colors. In the following description, the first pixel  49 R, the second pixel  49 G, and the third pixel  49 B are referred to as pixels  49  when they need not be distinguished from one another. The number of pixels  49  included in one pixel Pix is not limited to three, and four or more pixels  49  may be included in one pixel Pix. The pixel Pix may include a fourth pixel  49 W that displays white as a fourth color, for example. The arrangement of the pixels  49  is not limited to the configuration illustrated in  FIG. 2 . The first pixel  49 R, for example, may be adjacently disposed with the second pixel  49 G in the first direction Dx. The first pixel  49 R, the second pixel  49 G, and the third pixel  49 B may be repeatedly arrayed in this order in the first direction Dx. 
     Each pixel  49  includes one inorganic light emitter  100 . The display device  1  displays an image by outputting different light from the respective inorganic light emitters  100  in the first pixel  49 R, the second pixel  49 G, and the third pixel  49 B. The inorganic light emitter  100  is an inorganic light-emitting diode (LED) chip having a size of approximately several micrometers to 300 micrometers in planar view. Typically, a light-emitting diode having a chip size of 100 micrometers or larger is called a mini LED, and a light-emitting diode having a chip size of several micrometers to smaller than 100 micrometers is called a micro LED. The present invention can use LEDs having any size and may choose the LEDs depending on the screen size (size of one pixel) of the display device. A display device including micro LEDs in respective pixels is also called a micro LED display device. The term “micro” of the micro LED is not intended to limit the size of the inorganic light emitter  100 . 
       FIG. 3  is a circuit diagram of an exemplary configuration of a pixel circuit of the display device. A pixel circuit PICA illustrated in  FIG. 3  is provided to each of the first pixel  49 R, the second pixel  49 G, and the third pixel  49 B. The pixel circuit PICA is provided to the substrate  10  and supplies drive signals (electric current) to the inorganic light emitter  100 . The explanation of the pixel circuit PICA with reference to  FIG. 3  is applicable to the respective pixel circuits PICA included in the first pixel  49 R, the second pixel  49 G, and the third pixel  49 B. 
     As illustrated in  FIG. 3 , the pixel circuit PICA includes the inorganic light emitter  100 , five transistors, and two capacitances. Specifically, the pixel circuit PICA includes a light emission control transistor BCT, an initialization transistor IST, a writing transistor SST, a reset transistor RST, and a drive transistor DRT. Some of the transistors may be shared by the pixels  49  disposed adjacently. The light emission control transistor BCT, for example, may be shared by three pixels  49  via common wiring. The reset transistors RST may be provided in the peripheral region GA and be each provided to one row of the pixels  49 , for example. In this case, the reset transistor RST is coupled to the drains of a plurality of drive transistors DRT via common wiring. The reset transistor RST may be coupled to the sources of the drive transistors DRT. 
     The transistors included in the pixel circuit PICA are composed of n-type thin-film transistors (TFTs). The present embodiment is not limited thereto, and the transistors may be composed of p-type TFTs. To use p-type TFTs, the coupling form of a power supply potential, holding capacitance Cs 1 , and capacitance Cs 2  may be appropriately employed. 
     The light emission control scanning line BG is coupled to the gate of the light emission control transistor BCT. The initialization control scanning line IG is coupled to the gate of the initialization transistor IST. The writing control scanning line SG is coupled to the gate of the writing transistor SST. The reset control scanning line RG is coupled to the gate of the reset transistor RST. 
     The light emission control scanning line BG, the initialization control scanning line IG, the writing control scanning line SG, and the reset control scanning line RG are coupled to the drive circuits  12  (refer to  FIG. 1 ). The drive circuits  12  supply light emission control signals Vbg, initialization control signals Vig, writing control signals Vsg, and reset control signals Vrg to the light emission control scanning line BG, the initialization control scanning line IG, the writing control scanning line SG, and the reset control scanning line RG, respectively. 
     The drive IC  210  (refer to  FIG. 1 ) supplies video signals Vsig to the respective pixel circuits PICA of the first pixel  49 R, the second pixel  49 G, and the third pixel  49 B in a time-division manner. A switching circuit, such as a multiplexer, is provided between each row of the first pixels  49 R, the second pixels  49 G, and the third pixels  49 B and the drive IC  210 . The video signals Vsig are supplied to the writing transistor SST via a video signal line L 2 . The drive IC  210  supplies a reset power supply potential Vrst to the reset transistor RST via a reset signal line L 3 . The drive IC  210  supplies an initialization potential Vini to the initialization transistor IST via an initialization signal line L 4 . 
     The light emission control transistor BCT, the initialization transistor IST, the writing transistor SST, and the reset transistor RST each function as a switching element that selects electrical continuity and discontinuity between two nodes. The drive transistor DRT functions as an electric current control element that controls an electric current flowing through the inorganic light emitter  100  based on voltage between the gate and the drain. 
     The cathode (cathode electrode  114 ) of the inorganic light emitter  100  is coupled to a cathode power supply line L 10 . The anode (anode electrode  112 ) of the inorganic light emitter  100  is coupled to an anode power supply line L 1  (first power supply line) via the drive transistor DRT and the light emission control transistor BCT. The anode power supply line L 1  is supplied with an anode power supply potential PVDD (first potential). The cathode power supply line L 10  is supplied with a cathode power supply potential PVSS (second potential). The anode power supply potential PVDD is higher than the cathode power supply potential PVSS. The cathode power supply line L 10  includes the cathode wiring  60 . 
     The pixel circuit PICA includes the capacitance Cs 1  and the capacitance Cs 2 . The capacitance Cs 1  is capacitance formed between the gate and the source of the drive transistor DRT. The capacitance Cs 2  is an additional capacitance formed between the cathode power supply line L 10  and both the source of the drive transistor DRT and the anode of the inorganic light emitter  100 . 
     The pixel circuit PICA may include a transistor CCT between the light emission control transistor BCT and the drive transistor DRT. In this case, the source of the transistor CCT is coupled to the drain of the light emission control transistor BCT, and the drain of the transistor CCT is coupled to the source of the drive transistor DRT. The gate of the transistor CCT is coupled to wiring CG that supplies an electric potential to the gate of the transistor CCT. When an electric potential is supplied to the gate of the transistor CCT via the wiring CG, the drain of the light emission control transistor BCT and the source of the drive transistor DRT are brought into an electrically continuous state: and when no electric potential is supplied to the gate of the transistor CCT via the wiring CG, the drain of the light emission control transistor BCT and the source of the drive transistor DRT are brought into an electrically discontinuous state. 
     The display device  1  drives the pixels  49  in the first row to the pixels  49  in the last row, thereby displaying an image of one frame in one frame period. 
     In a reset period, the electric potential of the light emission control scanning line BG is switched to an L (low) level, and the electric potential of the reset control scanning line RG is switched to an H (high) level by the control signals supplied from the drive circuits  12 . As a result, the light emission control transistor BCT is turned off (electrically discontinuous state), and the reset transistor RST is turned on (electrically continuous state). 
     As a result, electric charges remaining in the pixel  49  flow to the outside via the reset transistor RST, and the source of the drive transistor DRT is fixed to the reset power supply potential Vrst. The reset power supply potential Vrst is set with a predetermined potential difference with respect to the cathode power supply potential PVSS. The potential difference between the reset power supply potential Vrst and the cathode power supply potential PVSS is smaller than the potential difference at which the inorganic light emitter  100  starts to emit light. 
     Subsequently, the electric potential of the initialization control scanning line IG is switched to the H level by the control signals supplied from the drive circuits  12 . The initialization transistor IST is turned on. The gate of the drive transistor DRT is fixed to the initialization potential Vini via the initialization transistor IST. 
     Subsequently, the electric potential of the initialization control scanning line IG is switched to the H level by the control signals supplied from the drive circuits  12 . The initialization transistor IST is turned on. The gate of the drive transistor DRT is fixed to the initialization potential Vini via the initialization transistor IST. 
     The drive circuits  12  turn on the light emission control transistor BCT and turn off the reset transistor RST. When the source potential is equal to (Vini−Vth), the drive transistor DRT is turned off. As a result, a threshold voltage Vth of the drive transistor DRT can be acquired for each of the pixels  49 , whereby variations in the threshold voltage Vth of the respective pixels  49  are offset. 
     In a subsequent video signal writing operation period, the light emission control transistor BCT is turned off, the initialization transistor IST is turned off, and the writing transistor SST is turned on by the control signals supplied from the drive circuits  12 . The video signals Vsig are input to the gate of the drive transistor DRT in each of the pixels  49  belonging to one row. The video signal line L 2  extends in the second direction Dy and is coupled to the pixels  49  in a plurality of rows belonging to the same column. As a result, the video signal writing operation period is performed row by row. 
     In a subsequent light emission operation period, the light emission control transistor BCT is turned on, and the writing transistor SST is turned off by the control signals supplied from the drive circuits  12 . The anode power supply potential PVDD is supplied to the drive transistor DRT from the anode power supply line L 1  via the light emission control transistor BCT. The drive transistor DRT supplies an electric current corresponding to the gate-source voltage to the inorganic light emitter  100 . The inorganic light emitter  100  emits light with the luminance corresponding to the electric current. 
     The drive circuits  12  may drive the pixels  49  row by row, simultaneously drive the pixels  49  in two rows, or simultaneously drive the pixels  49  in three or more rows. 
     The configuration of the pixel circuit PICA illustrated in  FIG. 3  is given by way of example only and can be appropriately changed. The number of wires and the number of transistors in one pixel  49 , for example, may be different from those illustrated in  FIG. 3 . The pixel circuit PICA may have a configuration of a current mirror circuit or the like. 
       FIG. 4  is a sectional view along line IV-IV′ of  FIG. 1 . As illustrated in  FIG. 4 , the array substrate  2  of the display device  1  includes the substrate  10  and a plurality of transistors. The substrate  10  has a first surface  10   a  and a second surface  10   b  opposite to the first surface  10   a.  The substrate  10  is an insulating substrate and is, for example, a glass substrate, a quartz substrate, or a flexible substrate made of acrylic resin, epoxy resin, polyimide resin, or polyethylene terephthalate (PET) resin. 
     In the present specification, a direction from the substrate  10  toward the inorganic light emitter  100  in a direction perpendicular to the surface of the substrate  10  is referred to as an “upper side” or simply as “on”. A direction from the inorganic light emitter  100  toward the substrate  10  is referred to as a “lower side” or simply as “under”. To describe an aspect where a first structure is disposed on a second structure, the term “on” includes both of the following cases unless otherwise noted: a case where the first structure is disposed directly on the second structure such that it contacts the second structure, and a case where the first structure is disposed on the second structure with another structure interposed therebetween. 
     An undercoat layer  20  is provided on the first surface  10   a  of the substrate  10 . A light-blocking layer may be provided on the first surface  10   a  of the substrate  10 . In this case, the undercoat layer  20  covers the light-blocking layer. The light-blocking layer may be made of any desired material as long as it blocks light. The light-blocking layer is a molybdenum-tungsten alloy film, for example. 
     A plurality of transistors are provided on the undercoat layer  20 . The drive transistor DRT and the writing transistor SST included in the pixel  49  are provided as the transistors in the display region AA of the substrate  10 , for example. A transistor TrC included in the drive circuits  12  is provided as the transistors in the peripheral region GA of the substrate  10 . While the drive transistor DRT, the writing transistor SST, and the transistor TrC out of the transistors are illustrated, the light emission control transistor BCT, the initialization transistor IST, and the reset transistor RST included in the pixel circuit PICA also have the same multilayered structure as that of the drive transistor DRT. In the following description, the transistors are simply referred to as transistors Tr when they need not be distinguished from one another. 
     The transistor Tr is a TFT having a dual-gate structure, for example. Each transistor Tr includes a first gate electrode  21 , a second gate electrode  31 , a semiconductor layer  25 , a source electrode  41   s,  and a drain electrode  41   d.  The first gate electrode  21  is provided on the undercoat layer  20 . An insulating film  24  is provided on the undercoat layer  20  and covers the first gate electrode  21 . The semiconductor layer  25  is provided on the insulating film  24 . The semiconductor layer  25  is made of polycrystalline silicon, for example. The material of the semiconductor layer  25  is not limited thereto and may be microcrystalline oxide semiconductor, amorphous oxide semiconductor, or low-temperature polycrystalline silicon, for example. An insulating film  29  is provided on the semiconductor layer  25 . The second gate electrode  31  is provided on the insulating film  29 . 
     The undercoat layer  20  and the insulating films  24 ,  29 , and  45  are inorganic insulating films and are made of silicon oxide (SiO 2 ) or silicon nitride (SiN), for example. The first gate electrode  21  and the second gate electrode  31  face each other with the insulating film  24 , the semiconductor layer  25 , and the insulating film  29  interposed therebetween in the third direction Dz. The part of the insulating films  24  and  29  sandwiched by the first gate electrode  21  and the second gate electrode  31  functions as a gate insulating film. The part of the semiconductor layer  25  sandwiched by the first gate electrode  21  and the second gate electrode  31  serves as a channel region  27  of the transistor Tr. The part of the semiconductor layer  25  coupled to the source electrode  41   s  serves as a source region of the transistor Tr. The part of the semiconductor layer  25  coupled to the drain electrode  41   d  serves as a drain region of the transistor Tr. The part between the channel region  27  and the source region and the part between the channel region  27  and the drain region are each provided with a low-concentration impurity region. While n-type TFTs alone are illustrated as the transistors Tr, p-type TFTs may be simultaneously formed. 
     A gate line  31   a  is coupled to the second gate electrode  31  of the transistor DRT. The insulating film  29  is provided between the substrate  10  and the gate line  31   a,  and capacitance CS is formed between the gate line  31   a  and the substrate  10 . The first gate electrode  21 , the second gate electrode  31 , and the gate line  31   a  are made of aluminum (Al), copper (Cu), silver (Ag), molybdenum (Mo), or an alloy film made of these metals, for example. 
     The structure of the transistor Tr according to the present embodiment is not limited to a dual-gate structure. The transistor Tr may have a bottom-gate structure in which the gate electrode is composed of only the first gate electrode  21 . Alternatively, the transistor Tr may have a top-gate structure in which the gate electrode is composed of only the second gate electrode  31 . The undercoat layer  20  is not necessarily provided. 
     The display device  1  includes an insulating film  35  provided on the first surface  10   a  of the substrate  10  to cover the transistors Tr. The source electrodes  41   s  are provided on the insulating film  35  and are each coupled to the source of the corresponding transistor Tr through a through hole formed in the insulating film  35 . The drain electrodes  41   d  are provided on the insulating film  35  and are each coupled to the drain of the corresponding transistor Tr through a through hole formed in the insulating film  35 . The cathode wiring  60  is provided on the insulating film  35  in the peripheral region GA. An insulating film  42  covers the source electrodes  41   s,  the drain electrodes  41   d,  and the cathode wiring  60 . The insulating film  35  is an inorganic insulating film, and the insulating film  42  is an organic insulating film. The source electrode  41   s  and the drain electrode  41   d  are multilayered films made of TiAlTi or TiAl, which is a multilayered structure of titanium and aluminum. The insulating film  42  is made of organic material, such as photosensitive acrylic. 
     Part of the source electrode  41   s  is formed in a region overlapping the gate line  31   a.  The capacitance Cs 1  is formed by the gate line  31   a  and the source electrode  41   s  facing each other with the insulating film  35  interposed therebetween. The gate line  31   a  is formed in a region overlapping part of the semiconductor layer  25 . The capacitance Cs 1  includes capacitance formed by the semiconductor layer  25  and the gate line  31   a  facing each other with the insulating film  24  interposed therebetween. 
     The display device  1  includes source coupling wiring  43   s,  drain coupling wiring  43   d,  an insulating film  45 , a counter anode electrode  50   e,  an insulating film  70 , a flattening film  80 , a counter cathode electrode  90   e,  and a cover part  92 . The source coupling wiring  43   s  is provided on the insulating film  42  and is coupled to the source electrode  41   s  through a through hole formed in the insulating film  42 . The drain coupling wiring  43   d  is provided on the insulating film  42  and is coupled to the drain electrode  41   d  through a through hole formed in the insulating film  42 . The insulating film  45  is provided on the insulating film  42  and covers the source coupling wiring  43   s  and the drain coupling wiring  43   d.  The counter anode electrode  50   e  is provided on the insulating film  45  and is coupled to the drain coupling wiring  43   d  of the drive transistor DRT through a through hole formed in the insulating film  45 . The inorganic light emitter  100  is provided on the counter anode electrode  50   e.  The counter anode electrode  50   e  is coupled to the anode electrode  112  of the inorganic light emitter  100 . The capacitance Cs 2  is formed between the counter anode electrode  50   e  and the source coupling wiring  43   s  facing each other with the insulating film  45  interposed therebetween. The source coupling wiring  43   s  and the drain coupling wiring  43   d  are made of a transparent electric conductor, such as indium tin oxide (ITO). 
     The insulating film  70  is provided on the insulating film  45  and covers the side surfaces of the counter anode electrode  50   e.  The insulating film  70  has an opening for mounting the inorganic light emitter  100  at a position overlapping the counter anode electrode  50   e.  The area of the opening of the insulating film  70  is larger than the contact area of the inorganic light emitter  100  with the counter anode electrode  50   e  in planar view. The area of the counter anode electrode  50   e  is larger than the contact area of the inorganic light emitter  100  with the counter anode electrode  50   e  in planar view. The flattening film  80  is provided on the insulating film  70  and covers the side surfaces of the inorganic light emitter  100 . The counter cathode electrode  90   e  is provided on the flattening film  80 . The insulating film  70  is an inorganic insulating film and is a silicon nitride film (SiN), for example. The flattening film  80  is an organic insulating film or an inorganic-organic hybrid insulating film (made of material in which an organic group (a methyl or phenyl group) is bonded to a main chain of Si—O, for example). The upper surface (cathode electrode  114 , refer to  FIG. 5 ) of the inorganic light emitter  100  is exposed from the flattening film  80 . 
     The counter cathode electrode  90   e  is coupled to the cathode electrode  114  of the inorganic light emitter  100 . The counter cathode electrode  90   e  is coupled to the cathode wiring  60  provided on the array substrate  2  through a contact hole H 1  formed outside the display region AA. Specifically, the contact hole H 1  is formed in the flattening film  80  and the insulating film  42 , and the cathode wiring  14  is provided at the bottom of the contact hole H 1 . The cathode wiring  60  is provided on the insulating film  35 . In other words, the cathode wiring  60  is provided in the same layer and is made of the same material as those of the source electrode  41   s  and the drain electrode  41   d.  The counter cathode electrode  90   e  is continuously provided from the display region AA to the peripheral region GA and is coupled to the cathode wiring  60  at the bottom of the contact hole H 1 . The cover part  92  is provided on the counter cathode electrode  90   e.  The cover part  92  is a cover made of a member that allows light to pass therethrough, such as glass. The cover part  92  is not necessarily provided. 
     While the counter anode electrode  50   e  according to the present embodiment is directly coupled to the anode electrode  112  of the inorganic light emitter  100 , the counter anode electrode  50   e  and the anode electrode  112  may be coupled with a coupling layer interposed therebetween. For example, an insulating film covering the counter anode electrode  50   e  is provided on an insulating film  66 , and a coupling layer provided on the insulating film is coupled to the counter anode electrode  50   e  through a through hole formed in the insulating film  66 . The anode electrode is provided on the coupling layer. The coupling layer is a conductive member. 
     The following describes the configuration of the inorganic light emitter  100 .  FIG. 5  is a sectional view of an exemplary configuration of the inorganic light emitter according to the present embodiment. As illustrated in  FIG. 5 , the inorganic light emitter  100  includes an inorganic light-emitting element  102 , the anode electrode  112 , and the cathode electrode  114 . 
     The inorganic light-emitting element  102  is a light emission layer that emits light. The inorganic light-emitting element  102  includes an n-type cladding layer  104 , a p-type cladding layer  106 , and a light emission layer  108  provided between the p-type cladding layer  106  and the n-type cladding layer  104 . In the inorganic light-emitting element  102  according to the present embodiment, the p-type cladding layer  106 , the light emission layer  108 , and the n-type cladding layer  104  are stacked in order toward the upper side. The inorganic light-emitting element  102  is made of compound semiconductor, such as gallium nitride (GaN), aluminum indium gallium phosphorous (AlInGaP), aluminum gallium arsenic (AlGaAs), and gallium arsenic phosphorus (GaAsP). More specifically, the p-type cladding layer  106  and the n-type cladding layer  104  according to the present embodiment are made of gallium nitride (GaN), for example. The light emission layer  108  is made of indium gallium nitride (InGaN), for example. The light emission layer  108  may have a multi-quantum well structure (MQW) in which InGaN and GaN are stacked. 
     In the inorganic light emitter  100 , the anode electrode  112 , the p-type cladding layer  106 , the light emission layer  108 , the n-type cladding layer  104 , and the cathode electrode  114  are stacked in order toward the upper side. The counter anode electrode  50   e  is provided under the inorganic light emitter  100 , and the counter cathode electrode  90   e  is provided on the inorganic light emitter  100 . 
     The counter anode electrode  50   e  includes a conductive member, and more specifically includes metal material in this example. The counter anode electrode  50   e  according to the present embodiment includes titanium (Ti) and aluminum (Al), and Ti layers and Al layers are stacked along the third direction Dz, for example. The counter anode electrode  50   e  is provided for each inorganic light emitter  100  (pixel  49 ) as a pixel electrode. 
     The anode electrode  110  is provided on the counter anode electrode  50   e.  The anode electrode  110  is a translucent conductive member, such as ITO. The anode electrode  110  is electrically coupled to the counter anode electrode  50   e.  The p-type cladding layer  106  is provided on the anode electrode  110 . The anode electrode  110  is coupled to the p-type cladding layer  106 . 
     The cathode electrode  114  is provided on the n-type cladding layer  104 . The cathode electrode  114  is a translucent conductive member, such as ITO. The cathode electrode  114  is coupled to the counter cathode electrode  90   e.    
     The counter cathode electrode  90   e  serving as a counter electrode is a translucent conductive member, such as ITO. The counter cathode electrode  90   e  is a common electrode shared by a plurality of (in this case, all) the inorganic light emitters  100  (pixels  49 ) and is coupled to the cathode electrodes  114  of a plurality of (in this case, all) the inorganic light emitters  100 . 
     Repairing the Display Device 
     The display device  1  having the configuration described above displays an image by emitting light from the inorganic light emitters  100 . The display device  1  including the inorganic light emitters  100  is difficult to manufacture and may possibly have defects because of difficulties in mounting the inorganic light emitters  100  due to their small size, for example. If the display device  1  determined to be defective is not used and is discarded, the yield decreases. To address this, the present embodiment repairs the display device  1  determined to be defective, thereby making the defective display device  1  usable and suppressing reduction in yield. Being defective herein refers to a state where at least some of the inorganic light emitters  100  mounted on the display device  1  do not appropriately emit light. The state where the inorganic light emitters  100  do not appropriately emit light includes a dark spot state or a bright spot state. The dark spot state refers to a state where the inorganic light emitter  100  does not emit light when an electric current for causing the inorganic light emitter  100  to emit light is applied thereto. Applying an electric current for causing the inorganic light emitter  100  according to the present embodiment to emit light refers to supplying an electric current corresponding to a display gradation to the inorganic light emitter  100  from the anode power supply line L 1  via the drive transistor DRT in a light emission operation period. In this case, an electric current corresponding to the display gradation is supplied from the drive transistor DRT to the anode electrode  112  of the inorganic light emitter  100  via the drain coupling wiring  43   d  and the counter anode electrode  50   e,  and the inorganic light emitter  100  normally emits light due to the electric current. In the dark spot state, however, the inorganic light emitter  100  does not emit light when an electric current is supplied to the inorganic light emitter  100  from the anode power supply line L 1  via the drive transistor DRT, that is, when an electric current for causing the inorganic light emitter  100  to emit light is applied thereto. By contrast, the bright spot state refers to a state where the inorganic light emitter  100  emits light when no electric current for causing the inorganic light emitter  100  to emit light is applied thereto. In other words, the bright spot state is a state where the inorganic light emitter  100  emits light when no electric current for causing the inorganic light emitter  100  to emit light is applied thereto, that is, when the drive transistor DRT coupled to the inorganic light emitter  100  should be turned off. 
     Examples of possible defective modes in the dark spot state include, but are not limited to, disconnection between the anode power supply line L 1  and the inorganic light emitter  100 , poor electrical continuity characteristics of the transistors, mounting failure due to failure in forming the counter cathode electrode  90   e,  poor characteristics of the inorganic light emitter  100  itself. The mounting failure due to failure in forming the counter cathode electrode  90   e  out of these defects can be restored to the normal state by the repairing described below. 
     Examples of possible defective modes in the bright spot state include, but are not limited to, a short-circuit of the power supply due to foreign matter and the like between the anode power supply line L 1  and the inorganic light emitter  100 , poor switching characteristics of the transistors. In other words, the bright spot state fails to be restored to the normal state by repairing because it is caused by a problem on the substrate. The bright spot, however, can be darkened by the repairing described below. While the dark spot is a defect, the defect of the dark spot is more allowable than the defect of the bright spot in terms of the device quality. Consequently, darkening the bright spot is effective. 
     The method for repairing the display device  1  according to the present embodiment starts with detecting a defective inorganic light emitter  100 A that is an inorganic light emitter  100  having defects out of the inorganic light emitters  100  mounted on the display device  1 . The defective inorganic light emitter  100 A is an inorganic light emitter  100  in the bright spot state or the dark spot state. The display device  1  according to the present embodiment is manufactured by stacking the counter anode electrode  50   e,  the inorganic light emitter  100 , and the counter cathode electrode  90   e  on the array substrate  2 , for example. In other words, the parts under the counter cathode electrode  90   e  and the counter cathode electrode  90   e  of the display device  1  are formed. Subsequently, a lighting inspection is carried out on the display device  1  to detect the defective inorganic light emitter  100 A. In the lighting inspection, an electric current for causing the inorganic light emitter  100  to emit light is applied to all the inorganic light emitters  100 , for example, and an inorganic light emitter  100  that does not emit light is detected as the defective inorganic light emitter  100 A in the dark spot state. In addition, out of the inorganic light emitters  100 , an inorganic light emitter  100  that emits light even though no electric current for causing the inorganic light emitter  100  to emit light is applied thereto is detected as the defective inorganic light emitter  100 A in the bright spot state. 
       FIGS. 6 and 7  are schematics of an example of repairing the display device. In the method for repairing the display device  1  according to the present embodiment, when the defective inorganic light emitter  100 A is detected, a target portion AR corresponding to a portion to be removed in the counter cathode electrode  90   e  is determined based on the position of the detected defective inorganic light emitter  100 A. In other words, the portion to be removed in the counter cathode electrode  90   e  is determined based on the position of the defective inorganic light emitter  100 A in the present repairing method.  FIG. 6  is a schematic of the counter cathode electrode  90   e  viewed from the top, and  FIG. 7  is a schematic sectional view of a part near the inorganic light emitters  100 . As illustrated in  FIG. 6 , a portion AR 1  and a portion AR 2  in the entire region of the counter cathode electrode  90   e  are determined as the target portion AR in the present repairing method. The portion AR 1  is coupled to the defective inorganic light emitter  100 A, and the portion AR 2  surrounds the outer periphery of the portion AR 1 . 
     The portion AR 1  is a portion of the counter cathode electrode  90   e  coupled to the cathode electrode  114  of the defective inorganic light emitter  100 A. In other words, the portion AR 1  is a portion overlapping the cathode electrode  114  of the defective inorganic light emitter  100 A in planar view. The portion AR 2  is a portion of the counter cathode electrode  90   e  surrounding the entire section of the outer periphery of the portion AR 1 , that is, a portion surrounding the entire periphery of the portion AR 1 . The portion AR 2  does not include the portion coupled to the inorganic light emitter  100 . More specifically, when the center point of the defective inorganic light emitter  100 A in planar view is defined as a center point Ax, a direction approaching the center point in planar view is referred to as an inner side in the radial direction, and a direction approaching the center point in planar view is referred to as an outer side in the radial direction. In this case, the portion AR 2  is positioned on the outer side in the radial direction than the portion AR 1  and on the inner side in the radial direction than portions AR 3  in planar view. The portions AR 3  are portions of the counter cathode electrode  90   e  coupled to the inorganic light emitters  100 A adjacently disposed with the defective inorganic light emitter  100 A. More specifically, when the entire section of the outer end (outer periphery) of the portion AR 2  is defined as an outer end AR 2   a,  the target portion AR according to the present embodiment is the entire region on the inner side in the radial direction of the outer end AR 2   a.  The outer end AR 2   a  is positioned on the outer side in the radial direction than the portion AR 1  and on the inner side in the radial direction than the portions AR 3  in planar view. If a plurality of defective inorganic light emitters  100 A are selected, the target portions AR are determined for the respective defective inorganic light emitters  100 A. 
     After the position of the target portion AR is determined, the present embodiment outputs light LI to the target portion AR of the counter cathode electrode  90   e  by a light irradiation device LU as illustrated in  FIG. 7 . The target portion AR of the counter cathode electrode  90   e  is removed by being irradiated with the light LI, and a space AR 0  is formed. The space AR 0  is a space formed by removing the target portion AR of the counter cathode electrode  90   e.    FIGS. 6 and 7  illustrate the state where the target portion AR is removed, and the space AR 0  is formed. In the present repairing method, not only the target portion AR of the counter cathode electrode  90   e  but also the inorganic light emitter  100  may be irradiated with the light LI. While the light LI decomposes and removes the counter cathode electrode  90   e  when it is incident on the counter cathode electrode  90   e,  the light LI does not decompose the inorganic light emitter  100  when it is incident on the inorganic light emitter  100 . In other words, if the light LI is incident on the inorganic light emitter  100 , the inorganic light emitter  100  is not damaged by the light LI and does not carbonize, for example. The light LI is light with a wavelength in the ultraviolet region, for example, preferably light with a wavelength of 216 nm to 316 nm, and more preferably light with a wavelength of 240 nm to 282 nm. The light LI according to the present embodiment is a laser beam, for example. The present embodiment irradiates one target portion AR with pulsed light LI in one shot and removes the target portion AR. The present embodiment is not limited thereto and may remove the target portion AR by performing scanning with the light LI and moving the trajectory of the light LI on the counter cathode electrode  90   e,  for example. 
     In the present repairing method, the target portion AR of the counter cathode electrode  90   e  is removed as described above. In the present repairing method, the defective inorganic light emitter  100 A is left unremoved from the display device  1 . In other words, the counter cathode electrode  90   e  is not provided (is removed) in the target portion AR, and the defective inorganic light emitter  100 A is left in the repaired display device  1 . In other words, the repaired display device  1  includes the counter cathode electrode  90   e,  an opening (space AR 0 ) formed in the counter cathode electrode  90   e,  and the defective inorganic light emitter  100 A. The opening (space AR 0 ) is formed at the position described above as the position of the target portion AR. The opening (space AR 0 ) is formed between the portion AR 1  provided with the inorganic light emitter  100  (defective inorganic light emitter  100 A) and the portions AR 3  provided with the inorganic light emitters  100  adjacently disposed with the inorganic light emitter  100  (defective inorganic light emitter  100 A) in the planar view, for example. 
     The target portion AR includes the portion of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A. Removing the target portion AR uncouples the defective inorganic light emitter  100 A from the counter cathode electrode  90   e.  If the defective inorganic light emitter  100 A is in the bright spot state, for example, no electric current flows from the defective inorganic light emitter  100 A to the cathode wiring  60  via the counter cathode electrode  90   e.  As a result, the defective inorganic light emitter  100 A is turned off, thereby resolving the bright spot state. While the defective inorganic light emitter  100 A is brought into the dark spot state, the defect of the dark spot state is less noticeable than that of the bright spot state of being turned on when unnecessary. Consequently, repairing in this manner can make the display device  1  usable. 
       FIG. 8  is a schematic of the example of repairing the display device. In the present repairing method, a conductive member  94  may be provided in the space AR 0  formed by removing the target portion AR of the counter cathode electrode  90   e  as illustrated in  FIG. 8 , for example. The conductive member  94  is a conductive member having translucency (that allows light from the inorganic light emitter  100  to pass therethrough). The conductive member  94  is preferably made of material different from that of the counter cathode electrode  90   e  and is made of translucent conductive polymer, for example. In the present repairing method, the conductive member  94  with which the space AR 0  is filled comes into contact with the defective inorganic light emitter  100 A and the counter cathode electrode  90   e.  As a result, the defective inorganic light emitter  100 A and the counter cathode electrode  90   e  are electrically coupled via the conductive member  94 . If the defective inorganic light emitter  100 A serves as the dark spot due to poor coupling between the counter cathode electrode  90   e  and the defective inorganic light emitter  100 A, for example, the conductive member  94  can couple the defective inorganic light emitter  100 A and the counter cathode electrode  90   e.  Consequently, the present repairing method can eliminate the dark spot and make the display device  1  usable. Providing the conductive member  94 , however, may possibly not resolve the defect. In the present repairing method, it is preferably determined whether the conductive member  94  may be provided, that is, whether the defective inorganic light emitter  100 A and the counter cathode electrode  90   e  can be recoupled. If it is determined that the conductive member  94  may be provided, the conductive member  94  is provided; and if it is determined that the conductive member  94  should not be provided, the conductive member  94  is not provided. The criteria for determining that the conductive member  94  may be provided can be optionally determined. Typically, it may be determined that the conductive member  94  may be provided if the defect is due to failure in forming the counter cathode electrode  90   e.  If the counter cathode electrode  90   e  and the counter anode electrode  50   e  are short-circuited as illustrated in  FIG. 13 , which will be described later, for example, it may be determined that the conductive member  94  may be provided after removing the short-circuited counter cathode electrode  90   e  and covering the exposed counter anode electrode  50   e.  If the conductive member  94  is provided as described above, the repaired display device  1  includes the counter cathode electrode  90   e,  the opening (space AR 0 ) formed in the counter cathode electrode  90   e,  the conductive member  94  provided in the opening, and the defective inorganic light emitter  100 A. The opening (space AR 0 ) is formed at the position described above as the position of the target portion AR. 
     In the description above, the target portion AR of the counter cathode electrode  90   e  includes the portion AR 1  coupled to the defective inorganic light emitter  100 A and the portion AR 2  positioned on the outer side in the radial direction of the portion AR 1 . The target portion AR does not necessarily include the portion AR 1  and the portion AR 2 . The target portion AR simply needs to include a portion between the portion AR 1  and the portions AR 3 .  FIGS. 9 and 10  are schematics of another example of repairing the display device. As illustrated in  FIG. 9 , for example, the target portion AR may not include the portion AR 1  but includes the portion AR 2 . The portion AR 2  illustrated in  FIG. 9  is a portion surrounding the entire periphery of the portion AR 1  and positioned on the outer side in the radial direction than the portion AR 1  and on the inner side in the radial direction than the portions AR 3  in planar view in the entire region of the counter cathode electrode  90   e.  When the inner end (inner periphery) of the portion AR 2  is defined as an inner end AR 2   b,  the inner end AR 2   b  may be positioned on the outer side in the radial direction than the outer periphery of the portion AR 1 . In other words, the portion AR 2  illustrated in  FIG. 9  is not coupled to the portion AR 1 , and the counter cathode electrode  90   e  is provided between the portion AR 2  and the portion AR 1 . The inner end Ar 2   b  may be provided at the same position as that of the outer periphery of the portion AR 1  or on the inner side in the radial direction than the outer periphery of the portion AR 1 , for example. 
     In this case, the light LI is output to the target portion AR (portion AR 2 ) of the counter cathode electrode  90   e,  thereby removing the target portion AR (portion AR 2 ) and forming the space AR 0  as illustrated in  FIG. 10 . If the target portion AR includes only the portion AR 2 , that is, if the target portion AR has a frame shape, the frame-shaped target portion AR is preferably removed by performing scanning with the light LI and moving the trajectory of the light LI on the counter cathode electrode  90   e.    
     By removing the portion AR 2  as the target portion AR, the portion AR 1  of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A is uncoupled from the portion of the counter cathode electrode  90   e  on the outer side in the radial direction than the target portion AR (space AR 0 ). As a result, the defective inorganic light emitter  100 A is uncoupled from the portion of the counter cathode electrode  90   e  on the outer side in the radial direction than the target portion AR (space AR 0 ). If the defective inorganic light emitter  100 A is in the bright spot state, for example, no electric current flows from the defective inorganic light emitter  100 A to the counter cathode electrode  90   e  on the outer side than the target portion AR. As a result, the defective inorganic light emitter  100 A is turned off, thereby resolving the bright spot state. In this case, the conductive member  94  is not necessarily formed in the space AR 0 , and the portion AR 1  and the portion of the counter cathode electrode  90   e  on the outer side in the radial direction than the target portion AR (space AR 0 ) may remain electrically uncoupled. 
     The following describes the method for repairing the display device  1  based on a flowchart.  FIG. 11  is a flowchart for explaining the method for repairing the display device according to the present embodiment. As illustrated in  FIG. 11 , after the counter cathode electrode  90   e  of the display device  1  is formed (Step S 10 ), that is, after the parts under the counter cathode electrode  90   e  and the counter cathode electrode  90   e  of the display device  1  are formed in the present repairing method, a lighting inspection is carried out (Step S 12 ), and it is detected whether the defective inorganic light emitter  100 A is present (Step S 14 ; detecting). If the defective inorganic light emitter  100 A is detected (Yes at Step S 14 ), the target portion AR of the counter cathode electrode  90   e  is determined based on the position of the defective inorganic light emitter  100 A (Step S 16 ) in the present repairing method. The present embodiment, for example, determines the portion AR 1  of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A and the portion AR 2  on the outer side in the radial direction of the portion AR 1  as the target portion AR. After the target portion AR is determined, the target portion AR of the counter cathode electrode  90   e  is irradiated with the light LI and is removed (Step S 18 ) to form the space AR 0 . As a result, the defective inorganic light emitter  100 A and the counter cathode electrode  90   e  are uncoupled. If a plurality of defective inorganic light emitters  100 A are present, the target portions AR are determined for the respective defective inorganic light emitters  100 A and are removed. After the target portion AR is removed, it is determined whether recoupling can be performed, that is, whether the conductive member  94  may be provided in the space AR 0  (Step S 20 ). If recoupling can be performed (Yes at Step S 20 ), the portion from which the counter cathode electrode  90   e  is removed, that is, the space AR 0  is filled with the conductive member  94  (Step S 22 ). As a result, the defective inorganic light emitter  100 A and the counter cathode electrode  90   e  are coupled via the conductive member  94 . If a plurality of defective inorganic light emitters  100 A are present, it is determined whether recoupling can be performed for the target portions AR corresponding to the respective defective inorganic light emitters  100 A at Step S 20 , and the spaces AR 0  are filled with the conductive member  94 . 
     If the space AR is filled with the conductive member  94  at Step S 22 , if recoupling cannot be performed (No at Step S 20 ), and if no defective inorganic light emitter  100  is detected (No at Step S 14 ), the present processing is terminated. In this case, a cover part  92  may be formed on the counter cathode electrode  90   e  to complete the display device  1 . 
     Specific Examples of Repairing 
     The following describes specific examples of repairing the display device  1 . The examples of repairing described below are given by way of example only, and the repairing method is not limited to the examples below. 
       FIGS. 12 to 15  are views for explaining specific examples of repairing the display device. To manufacture the display device  1 , the inorganic light emitter  100  is stacked on the array substrate  2 , and an insulating film  70  and a flattening film  80  are then stacked. If the insulating film  70  and the flattening film  80  are not appropriately stacked near the inorganic light emitter  100  as illustrated in Step S 30  in  FIG. 12 , for example, the counter anode electrode  50   e  under the inorganic light emitter  100  may not be covered with the insulating film  70  or the flattening film  80  and may possibly be exposed. If the counter cathode electrode  90   e  is formed in this structure, the counter cathode electrode  90   e  may be formed on the exposed counter anode electrode  50   e,  and the counter cathode electrode  90   e  and the counter anode electrode  50   e  may possibly be coupled. In this case, an electric current flowing through the counter anode electrode  50   e  does not flow into the inorganic light emitter  100  and is short-circuited to flow into the counter cathode electrode  90   e.  As a result, no electric current is supplied to the inorganic light emitter  100 , thereby bringing the inorganic light emitter  100  into the dark spot state. The inorganic light emitter  100  coupled to the counter anode electrode  50   e  short-circuited to the counter cathode electrode  90   e  serves as the defective inorganic light emitter  100 A. 
     If the counter cathode electrode  90   e  is in direct contact with the counter anode electrode  50   e,  the portion of the counter cathode electrode  90   e  coupled to the counter anode electrode  50   e  is included in the target portion AR as illustrated in Step S 32 . The target portion AR is removed by being irradiated with the light LI. By removing the target portion AR of the counter cathode electrode  90   e,  the counter anode electrode  50   e  is uncoupled from the target cathode electrode  90   e,  thereby eliminating the short circuit. In addition to the target portion AR of the counter cathode electrode  90   e,  the flattening film  80  and the insulating film  70  may be irradiated with the light LI to remove the flattening film  80  and the insulating film  70  around the inorganic light emitter  100 A. 
     Subsequently, the portion removed by the light LI, that is, the space AR 0  is filled with an insulating member  96  that is a member having insulating properties. More specifically, the part where the flattening film  80  or the insulating film  70  is not stacked around the inorganic light emitter  100  and the part where the flattening film  80  and the insulating film  70  have been removed by being irradiated with the light LI are also filled with the insulating member  96 . While the dark spot state of the inorganic light emitter  100 A is not resolved in  FIG. 12 , the short circuit between the counter anode electrode  50   e  and the counter cathode electrode  90   e  is eliminated. Consequently, the repairing method can suppress adverse effects of the short circuit and make the display device  1  usable. 
     As illustrated in  FIG. 13 , the space AR 0  may be filled with the conductive member  94 . As a result, the inorganic light emitter  100  and the counter cathode electrode  90   e  are coupled while eliminating the short circuit between the counter anode electrode  50   e  and the counter cathode electrode  90   e.  This repairing method can also resolve the dark spot state. Specifically, the space AR 0  is filled with the insulating member  96  such that the cathode electrode  114  of the defective inorganic light emitter  100 A remains exposed as illustrated in Step S 34  in  FIG. 13 . In other words, the space where the portion AR of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A has been present is not filled with the insulating member  96 . 
     Subsequently, as illustrated in Step S 36 , the conductive member  96  is provided in the space above the cathode electrode  114  exposed without being covered with the insulating member  96 , that is, the space where the portion AR of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A has been present, and the space therearound. As a result, the remaining counter cathode electrode  90   e  and the cathode electrode  114  of the defective inorganic light emitter  100 A are coupled by the conductive member  96 . Carrying out the process described above can not only eliminate the short circuit between the counter anode electrode  50   e  and the counter cathode electrode  90   e  but also couple the inorganic light emitter  100  to the counter cathode electrode  90   e,  thereby resolving the dark spot state. 
     Step S 40  in  FIG. 14  illustrates another specific example of the defect. If an extra load is applied to the inorganic light emitter  100  when stacking the inorganic light emitter  100 , for example, the counter anode electrode  50   e  under the inorganic light emitter  100  may possibly be pushed down by the inorganic light emitter  100  as illustrated in Step S 40  in  FIG. 14 . In this case, the insulating film  45  under the counter anode electrode  50   e  may possibly be broken. As a result, the counter anode electrode  50   e  comes into contact with an electrode under the insulating film  45 , resulting in a short circuit between the electrode and the counter anode electrode  50   e.  While the counter anode electrode  50   e  and the source coupling wiring  43   s  are in contact and short-circuited in the example illustrated in  FIG. 14 , the electrode in contact with the counter anode electrode  50   e  is not limited to the source coupling wiring  43   s. The  electrode simply needs to be an electrode that forms the capacitance Cs 2  with the counter anode electrode  50   e,  for example. If a high potential (e.g., the anode power supply potential PVDD) is applied to the electrode under the insulating film  45  when the counter anode electrode  50   e  and the electrode are short-circuited, the inorganic light emitter  100  (defective inorganic light emitter  100 A) coupled to the counter anode electrode  50   e  is brought into the bright spot state. If a low potential (e.g., the cathode power supply potential PVSS) is applied to the electrode, the inorganic light emitter  100  (defective inorganic light emitter  100 A) coupled to the counter anode electrode  50   e  is brought into the dark spot state. 
     If the counter anode electrode  50   e  is in direct contact with the electrode under the insulating film  45 , the portion AR 1  of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A and the portion AR 2  around the portion AR 1  are removed as the target portion AR by being irradiated with the light LI as illustrated in Step S 42 . While the flattening film  80  and the insulating film  70  around the defective inorganic light emitter  100 A are also removed at Step S 42 , they are not necessarily removed. 
     Subsequently, as illustrated in Step S 44 , the portion (space AR 0 ) removed by being irradiated with the light LI is filled with the insulating member  96 . This processing can uncouple the defective inorganic light emitter  100 A from the counter cathode electrode  90   e,  thereby resolving the bright spot state, for example. In this case, the counter anode electrode  50   e  and the electrode under the insulating film  45  remain short-circuited, and a through-current flows in the light emission operation period. The through-current, however, can be ignored because its value is small. 
       FIG. 15  illustrates another example of repairing when the counter anode electrode  50   e  is in direct contact with the electrode under the insulating film  45 . If the counter anode electrode  50   e  is in direct contact with the electrode under the insulating film  45 , at least part of the counter anode electrode  50   e  coupled to the defective inorganic light emitter  100 A is removed by being irradiated with the light LI as illustrated in Step S 46  in  FIG. 15 . More specifically, the coupling part of the counter anode electrode  50   e  coupled to the defective inorganic light emitter  100 A to the drain coupling wiring  43   d  is removed by being irradiated with the light LI. The portions facing the upper side of the counter anode electrode  50   e  in the flattening film  80 , the insulating film  70 , and the counter cathode electrode  90   e  provided on the counter anode electrode  50   e  are also irradiated with the light LI. As a result, these portions are also removed. In this case, the target portion AR corresponds to the portion of the counter cathode electrode  90   e  overlapping the coupling part of the counter anode electrode  50   e  to the drain coupling wiring  43   d  in planar view. The target portion AR (portion overlapping the coupling part of the counter anode electrode  50   e  to the drain coupling wiring  43   d ) does not surround the portion AR 1  coupled to the defective inorganic light emitter  100 A. The target portion AR is a portion between the portion AR 1  and the portion AR 3  coupled to the next inorganic light emitter  100 A. Also in this case, the target portion AR may include the portion AR 1  and the portion AR 2  around the portion AR 1 . In other words, the portion of the counter cathode electrode  90   e  coupled to the defective inorganic light emitter  100 A and the portion therearound may also be removed. 
     After the coupling part of the counter anode electrode  50   e  to the drain coupling wiring  43   d  is removed, the portion removed by being irradiated with the light LI is filled with the insulating member  96  as illustrated in Step S 48 . By removing the coupling part of the counter anode electrode  50   e  to the drain coupling wiring  43   d,  the drive transistor DRT and the counter anode electrode  50   e  are uncoupled. As a result, no electric current is supplied to the counter anode electrode  50   e,  thereby resolving the bright spot state and suppressing the through-current described above. 
     As described above, the method for repairing the display device  1  according to the present embodiment is a method for repairing the display device  1  including a plurality of inorganic light emitters  100  and a counter electrode (counter cathode electrode  90   e ). The inorganic light emitters  100  are arrayed in a matrix (row-column configuration). The counter electrode (counter cathode electrode  90   e ) is provided in a traveling direction of light emitted from the inorganic light emitters  100  and is coupled to the inorganic light emitters  100 . The present repairing method includes detecting the defective inorganic light emitter  100 A, and removing the target portion AR of the counter electrode (counter cathode electrode  90   e ) by irradiating the target portion AR with the light LI while leaving the defective inorganic light emitter  100 A unremoved. The target portion AR includes a portion of the counter electrode (counter cathode electrode  90   e ) between the portion AR 1  coupled to the defective inorganic light emitter  100 A and the portions AR 3  coupled to the inorganic light emitter  100  adjacently disposed with the defective inorganic light emitter  100 A. 
     In the repairing method according to the present embodiment, the portion of the counter cathode electrode  90   e  between the portions AR 1  and AR 3  is removed. Consequently, the repairing method can eliminate defects of the display device  1  and appropriately make the display device  1  usable if it has defects. Because the defective inorganic light emitter  100 A is left unremoved, the repairing method does not require the process of removing the defective inorganic light emitter  100 A, thereby facilitating the repairing. Providing the conductive member  94 , for example, can eliminate defects without replacing the defective inorganic light emitter  100 A and appropriately turn it on. 
     The target portion AR includes the portion AR 2  surrounding the outer periphery of the portion AR 1  of the counter electrode (counter cathode electrode  90   e ). In the repairing method according to the present embodiment, the defective inorganic light emitter  100 A is uncoupled from the portion outside the target portion AR of the counter electrode (counter cathode electrode  90   e ) by removing the target portion AR at the removing. In the repairing method according to the present embodiment, the defective inorganic light emitter  100 A is uncoupled from the counter cathode electrode  90   e  outside the target portion AR. As a result, an electric current is prevented from flowing from the defective inorganic light emitter  100 A to the counter cathode electrode  90   e  outside the target portion AR, thereby appropriately resolving the bright spot state, for example. 
     The target portion AR includes the portion AR 1  of the counter electrode (counter cathode electrode  90   e ) coupled to the defective inorganic light emitter  100 A. The defective inorganic light emitter  100 A and the counter electrode (counter cathode electrode  90   e ) are uncoupled by removing the target portion AR at the removing. In the repairing method according to the present embodiment, an electric current is prevented from flowing from the defective inorganic light emitter  100 A to the counter cathode electrode  90   e,  thereby appropriately resolving the bright spot state, for example. 
     At the removing, at least part of an electrode coupled to the inorganic light emitter  100  on the side opposite to the counter electrode (counter cathode electrode  90   e ) is also irradiated with light and is removed. As a result, a short circuit between the counter anode electrode  50   e  and the electrode under the insulating film  45  can be suppressed, for example. 
     The repairing method according to the present embodiment further includes recoupling of providing the conductive member  94  in the space AR 0  formed by removing the counter electrode (counter cathode electrode  90   e ) at the removing and electrically coupling the defective inorganic light emitter  100 A to the counter electrode (counter cathode electrode  90   e ) via the conductive member  94 . The recoupling can appropriately resolve the dark spot state, for example. 
     In the repairing method according to the present embodiment, at least one of the inorganic light emitter  100  that does not emit light when an electric current for causing the inorganic light emitter  100  to emit light is applied thereto and the inorganic light emitter  100  that emits light when no electric current for causing the inorganic light emitter  100  to emit light is applied thereto as the defective inorganic light emitter  100 A at the detecting. In other words, the dark spot state and the bright spot state are detected to repair the defective inorganic light emitter  100 A in those states. Consequently, the display device  1  can be appropriately made usable if it is in the bright spot state or the dark spot state. 
     The repaired display device  1  according to the present embodiment includes a plurality of inorganic light emitters  100  and a counter electrode (counter cathode electrode  90   e ). The inorganic light emitters  100  are arrayed in a matrix (row-column configuration). The counter electrode (counter cathode electrode  90   e ) is provided in a traveling direction of light emitted from the inorganic light emitters  100  and is coupled to the inorganic light emitters  100 . The counter electrode (counter cathode electrode  90   e ) has an opening (space AR 0 ) at a portion provided with a first inorganic light emitter  100  and a portion provided with a second inorganic light emitter  100  adjacently disposed with the first inorganic light emitter  100  when viewed from the traveling direction of light emitted from the inorganic light emitters  100 , that is, in planar view. The display device  1  is appropriately repaired and can be appropriately made usable if it has defects, for example. 
     Out of other advantageous effects provided by the aspects described in the present embodiment, advantageous effects clearly defined by the description in the present specification or appropriately conceivable by those skilled in the art are naturally provided by the present invention.