Display device and traffic mobile object

Abstract

A display device according to an embodiment comprises: a support member having a light transmission property; a light adjustment member disposed on the support member and having a plurality of openings; a plurality of first light-emitting elements respectively disposed in the plurality of openings on the support member; a plurality of first conductive parts electrically connected to a plurality of first electrodes of the plurality of first light-emitting elements; a plurality of second conductive parts electrically connected to a plurality of second electrodes of the plurality of first light-emitting elements; a covering member covering the light adjustment member, the plurality of first light-emitting elements, the plurality of first conductive parts, and the plurality of second conductive parts; a third conductive part extending in a first direction on the covering member and electrically connected to the plurality of first conductive parts; and a plurality of fourth conductive parts extending in the first direction on the covering member and electrically connected to the plurality of second conductive parts.

Description

Display device and mobile vehicle

[0001] The embodiments relate to a display device and a transportation vehicle including the display device.

[0002] Vehicles, such as automobiles, are equipped with displays that display information such as speed. In recent years, such displays have been gradually replacing physical meters with digital meters. Liquid crystal panels are typically used in digital meters. However, liquid crystal panels have the drawback of consuming a large amount of power.

[0003] Japanese Patent Application Laid-Open No. 2003-309293

[0004] The embodiments have been made in consideration of the above-mentioned problems, and have an object to provide a display device that can reduce power consumption.

[0005] a plurality of first light-emitting elements each having a plurality of light extraction surfaces, a plurality of electrode formation surfaces each located on an opposite side of the plurality of light extraction surfaces, a plurality of first electrodes respectively arranged on the plurality of electrode formation surfaces, and a plurality of second electrodes respectively arranged on the plurality of electrode formation surfaces, the plurality of first electrodes being spaced apart from the plurality of first electrodes; a plurality of first conductive portions arranged on the light adjustment member and electrically connected to the plurality of first electrodes; a plurality of second conductive portions arranged on the light adjustment member and electrically connected to the plurality of second electrodes; a covering member covering the light adjustment member, the plurality of first light-emitting elements, the plurality of first conductive portions, and the second conductive portions; a third conductive portion extending on the covering member along the first direction and electrically connected to the plurality of first conductive portions; and the plurality of fourth conductive portions extending on the covering member along the first direction and electrically connected to the plurality of second conductive portions. The first light emitting elements are disposed in the openings, respectively.

[0006] According to one embodiment of the present invention, it is possible to provide a display device that can reduce power consumption.

[0007] 9A . FIG. 9B is a schematic plan view illustrating a display device according to the first embodiment. FIG. 9C is a schematic plan view illustrating one panel in the display device according to the first embodiment. FIG. 9D is a schematic cross-sectional view illustrating a display device according to the first embodiment. FIG. 9E is a schematic cross-sectional view illustrating one light-emitting element in the display device according to the first embodiment. FIG. 9F is a schematic equivalent circuit diagram illustrating a display device according to the first embodiment. FIG. 9G is a schematic plan view illustrating a light adjustment member in the display device according to the first embodiment. FIG. 9H is a schematic block diagram illustrating a first control unit in the display device according to the first embodiment. FIG. 9H is a schematic plan view illustrating a light-emitting element and its periphery in the display device according to the first embodiment. FIG. 9H is a schematic cross-sectional view illustrating a light-emitting element in the display device according to the first embodiment. FIG. 9H is a schematic enlarged view of part XB in FIG. 9A . 11A . FIG. 12A is a schematic plan view illustrating a light-emitting element and its periphery in a display device according to a third modified example of the first embodiment. FIG. 11B is a schematic cross-sectional view taken along line XIB-XIB in FIG. 11A. FIG. 12B is a schematic cross-sectional view taken along line XIIB-XIIB in FIG. 12A. FIG. 12C is a schematic plan view illustrating one panel in a display device according to a fifth modified example of the first embodiment. FIG. 12D is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment. FIG. 12E is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment. FIG. 12F is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment. FIG. 12G is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment.1 is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment; FIG. 2 is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment; FIG. 3 is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment; FIG. 4 is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment; FIG. 5 is a schematic cross-sectional view illustrating a part of a manufacturing process of the display device according to the first embodiment; FIG. 6 is a schematic plan view illustrating a display device according to a second embodiment; FIG. 7 is a schematic view illustrating the operation of the display device according to the second embodiment; FIG. 8 is a schematic view illustrating the operation of the display device according to the second embodiment; FIG. 9 is a schematic plan view illustrating a display device according to a third embodiment; FIG. 10 is a schematic plan view illustrating a display device according to a fourth embodiment; FIG. 11 is a schematic equivalent circuit diagram illustrating a display device according to the fourth embodiment; FIG. 12 is a schematic view illustrating the interior of a transportation moving object according to a fifth embodiment; FIG. 13 is a schematic view illustrating an image displayed by the display device according to the fifth embodiment; FIG. 14 is a schematic view illustrating the rear surface of a transportation moving object according to a first modified example of the fifth embodiment. 13A and 13B are schematic diagrams illustrating a front surface of a traffic moving object according to a second modification of the fifth embodiment, and a schematic cross-sectional view illustrating a windshield of the traffic moving object according to the second modification of the fifth embodiment.

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc., are not necessarily the same as those in reality. Furthermore, even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In this specification and each drawing, elements similar to those previously described with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions thereof will be omitted as appropriate.

[0009] First Embodiment FIG. 1 is a schematic plan view illustrating a display device according to this embodiment. FIG. 2 is a schematic plan view illustrating one panel in the display device according to this embodiment. FIG. 3 is a schematic cross-sectional view illustrating the display device according to this embodiment. FIG. 4 is a schematic cross-sectional view illustrating one light-emitting element in the display device according to this embodiment. FIG. 5 is a schematic plan view illustrating one unit and its periphery in the display device according to this embodiment. FIG. 6 is a schematic equivalent circuit diagram illustrating the display device according to this embodiment. FIG. 7A is a schematic plan view illustrating a light adjustment member in the display device according to this embodiment. FIG. 7B is a schematic plan view illustrating a light adjustment member in a display device according to a first modification of this embodiment. FIG. 8 is a schematic block diagram illustrating a first control unit in the display device according to this embodiment.

[0010] The drawings are schematic and conceptual, and have been appropriately emphasized and simplified. Furthermore, even if the same components are shown in the drawings, the dimensional ratios, positional relationships, numbers, etc. may not be strictly consistent. The same applies to the other drawings described below.

[0011] 1, the display device 1 according to this embodiment includes one mounting substrate 100, multiple panels 200, and one flexible wiring 300. The flexible wiring 300 may be divided into multiple pieces. The display device 1 displays one image by linking the multiple panels 200.

[0012] The mounting substrate 100 is translucent and is made of, for example, glass. The mounting substrate 100 may be a flexible substrate that is both translucent and flexible. The multiple panels 200 are arranged in a line along one direction. The flexible wiring 300 is arranged across the multiple panels 200, connecting the multiple panels 200 to each other and connecting at least one panel 200 to the outside of the display device 1. The flexible wiring 300 is flexible and is, for example, an FPC (Flexible Printed Circuits). In the flexible wiring 300, multiple wirings 302 are provided on a tape-shaped insulating base 301.

[0013] For ease of explanation, the present specification will hereinafter adopt an XYZ Cartesian coordinate system. The direction parallel to the surface of the mounting substrate 100 and in which the multiple panels 200 are arranged will be referred to as the "X direction," and the direction parallel to the surface of the mounting substrate 100 and perpendicular to the X direction will be referred to as the "Y direction." The direction perpendicular to the X and Y directions will be referred to as the "Z direction."

[0014] Regarding the X direction, a distinction is made between the "+X direction" and the "-X direction" as necessary. The same applies to the Y direction and the Z direction. Within the Z direction, the direction from the mounting substrate 100 toward the panel 200 is referred to as the "+Z direction," and the opposite direction is referred to as the "-Z direction." The +Z direction is also referred to as "up" and the -Z direction as "down," but these expressions are also for convenience and are unrelated to the direction of gravity. Furthermore, in this specification, "planar view" refers to the view from the third direction Z (+Z direction or -Z direction). In describing the planar view, even if something is actually hidden by other components and cannot be seen, the description may be given assuming that it is visible.

[0015] As shown in FIG. 1 , there are multiple types of panels 200. The display device 1 is provided with, for example, three types of panels 200a, 200b, and 200c. The panel 200a can display an image with the highest resolution, the panel 200b can display an image with a lower resolution than the panel 200a, and the panel 200c can display an image with a lower resolution than the panel 200b. The configurations of the panels 200a, 200b, and 200c will be described later. Note that the number of types of panels 200 is not limited to three, and may be two or four or more.

[0016] Any combination of panels 200 may be used in the display device 1. In the example shown in Fig. 1, seven panels 200 are arranged in order from the left side of the figure (the -X direction side): panel 200c, panel 200b, panel 200a, panel 200a, panel 200b, panel 200c, and panel 200c.

[0017] 2 and 3 , the panel 200a includes a support member 10, a plurality of first light-emitting elements 21, a plurality of second light-emitting elements 22, a plurality of third light-emitting elements 23, a plurality of first conductive portions 33, a plurality of second conductive portions 34, a plurality of third conductive portions 31, a plurality of fourth conductive portions 32, a plurality of fifth conductive portions 35, a first control unit 51, one light adjustment member 61, an insulating covering member 71, an anisotropic connecting member 72, a connecting member 73, and a protective member 74. Note that some of these components may not be provided.

[0018] The support member 10 has a rectangular plate shape with the Y direction as the longitudinal direction, the X direction as the lateral direction, and the Z direction as the thickness direction, for example. The support member 10 is translucent. The support member 10 is made of glass, for example. The support member 10 may be a flexible substrate that is both translucent and flexible.

[0019] An image forming area 11 is defined on the upper surface of the support member 10, i.e., on the +Y direction side of the first surface 10a, which is the surface on the +Z direction side. A wiring connection area 12 is defined on the end of the first surface 10a of the support member 10 on the -Y direction side. A control unit mounting area 15 is defined between the image forming area 11 and the wiring connection area 12 on the support member 10.

[0020] In the image forming region 11, a plurality of element regions 13 and a plurality of wiring regions 14 are alternately arranged along the X direction. Each element region 13 and each wiring region 14 is shaped like a strip with the second direction Y as its longitudinal direction. In the image forming region 11, element regions 13 are arranged at both ends in the X direction. Therefore, the number of wiring regions 14 is one less than the number of element regions 13. For example, 50 element regions 13 and 49 wiring regions 14 are provided.

[0021] In each element region 13, a first light-emitting element 21, a second light-emitting element 22, and a third light-emitting element 23 are repeatedly arranged in a row along the Y direction (first direction). The first light-emitting element 21 is a blue light-emitting element, for example, an LED (light-emitting diode) having a peak wavelength in the range of 430 nm to 480 nm. The second light-emitting element 22 is a green light-emitting element, for example, an LED having a peak wavelength in the range of 500 nm to 580 nm. The third light-emitting element 23 is a red light-emitting element, for example, an LED having a peak wavelength in the range of 600 nm to 780 nm.

[0022] In the entire image forming region 11, across a plurality of element regions 13, a plurality of first light-emitting elements (first light-emitting element, fourth light-emitting element) 21 are arranged on the support member 10 along the X direction (second direction), a plurality of second light-emitting elements (second light-emitting element, fifth light-emitting element) 22 are arranged on the support member 10 along the X direction, and a plurality of third light-emitting elements (third light-emitting element, sixth light-emitting element) 23 are arranged on the support member 10 along the X direction. Furthermore, the plurality of second light-emitting elements 22 are arranged spaced apart in the Y direction from the plurality of first light-emitting elements 21, and the plurality of third light-emitting elements 23 are arranged spaced apart in the Y direction from the plurality of second light-emitting elements 22.

[0023] As shown in Fig. 4, each of the multiple first light-emitting elements 21 has one light extraction surface 21a, one electrode formation surface 21b, and multiple side surfaces 21c. The light extraction surface 21a faces the support member 10. The electrode formation surface 21b is located on the opposite side of the light extraction surface 21a. The side surfaces 21c connect the light extraction surface 21a and the electrode formation surface 21b. In one example, the light extraction surface 21a is square, and the electrode formation surface 21b is also square and smaller than the light extraction surface 21a. There are four side surfaces 21c, and each side surface 21c is trapezoidal.

[0024] Each first light-emitting element 21 has a semiconductor portion 21d, a first electrode 21e, and a second electrode 21f. The semiconductor portion 21d includes a p-type layer, an active layer, and an n-type layer. The first electrode 21e and the second electrode 21f are arranged spaced apart from each other on the electrode formation surface 21b. The first electrode 21e is electrically connected to the p-type layer of the semiconductor portion 21d, and the second electrode 21f is electrically connected to the n-type layer of the semiconductor portion 21d. The first light-emitting element 21 may have an insulating layer covering the region of the electrode formation surface 21b excluding the first electrode 21e and the second electrode 21f, as well as the side surface 21c. The second light-emitting element 22 and the third light-emitting element 23 have the same configuration.

[0025] As shown in FIGS. 2 and 5 , one third conductive portion 31 is disposed in each element region 13. The third conductive portion 31 is a wiring extending in the Y direction and includes, for example, copper (Cu). The third conductive portion 31 may be formed of a conductive and translucent material such as ITO (Indium-Tin-Oxide). The third conductive portion 31 is located on the +Z direction side of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 (hereinafter collectively referred to as "light-emitting element 20") disposed in the same element region 13, and overlaps the light-emitting element 20 in a plan view. The covering member 71 and the protective member 74 are not shown in FIG. 5 .

[0026] The third conductive portion 31 is electrically connected to the first electrode 21 e of the first light-emitting element 21 that overlaps it in a planar view via the first conductive portion 33. Similarly, the first conductive portion 33 is electrically connected to the first electrode of the second light-emitting element 22 that overlaps it in a planar view, and to the first electrode of the third light-emitting element 23 that overlaps it in a planar view. For example, one third conductive portion 31 arranged in each element region 13 is electrically connected to the first electrodes of all the light-emitting elements 20 arranged in this element region 13.

[0027] In the entire display device 1, the multiple first conductive portions 33 extend in the X direction and connect the multiple first electrodes 21e to the multiple third conductive portions 31. In other words, in a plan view, one of the multiple first light-emitting elements 21 is disposed on top of one of the multiple third conductive portions 31, and this one first light-emitting element 21 is electrically connected to this one third conductive portion 31.

[0028] A plurality of fourth conductive portions 32 are arranged in each wiring region 14. The plurality of fourth conductive portions 32 extend in the Y direction on the support member 10 and are electrically connected to the second electrodes 21f of the plurality of light-emitting elements 20 via a plurality of second conductive portions 34. In the entire display device 1, the plurality of second conductive portions 34 extend in the X direction and connect the plurality of second electrodes 21f to the plurality of fourth conductive portions 32, respectively. The fourth conductive portions 32 include, for example, copper. Note that the fourth conductive portions 32 may be formed of a material having conductivity and translucency, such as ITO. The third conductive portions 33 and the fourth conductive portions 34 include, for example, aluminum (Al).

[0029] 6, the first electrodes of the plurality of light-emitting elements 20 arranged in each element region 13 are commonly connected to one third conductive portion 31, and the second electrodes are individually connected to different second conductive portions 34. The third conductive portion 31 and the fourth conductive portion 32 are electrically connected to the first control unit 51. For example, the first electrode is an anode electrode of the light-emitting element, and the second electrode is a cathode electrode of the light-emitting element.

[0030] The first conductive portion 33 and the second conductive portion 34 may be arranged to cover the side surfaces of the light emitting element 20. This allows the light emitted from the light emitting element 20 to be reflected by the first conductive portion 33 and the second conductive portion 34, thereby improving the light extraction efficiency.

[0031] 3 and 7A , the light adjustment members 61 are positioned around each of the plurality of first light-emitting elements 21 on the first surface 10a of the support member 10. The light adjustment members 61 have light-absorbing properties and are formed of, for example, a black material, such as black resin. The light adjustment members 61 may be formed of black metal instead of black resin. The light adjustment members 61 may contain a light-absorbing substance. Examples of the light-absorbing substance include black pigments such as carbon black, graphite, etc.

[0032] In this embodiment, the light adjustment member 61 has a plurality of openings 61a. A unit 29, which is made up of one first light-emitting element 21, one second light-emitting element 22, and one third light-emitting element 23 arranged adjacent to each other in the Y direction, is disposed in each opening 61a. Therefore, the light adjustment member 61 is not disposed between the support member 10 and the light-emitting elements 20. Furthermore, the first light adjustment member 61 is not disposed between the first light-emitting element 21 and the second light-emitting element 22 belonging to each unit 29, and between the second light-emitting element 22 and the third light-emitting element 23.

[0033] 7B , in the display device 1a according to this modification, a plurality of openings 61e are provided in the light adjustment member 61, and one light-emitting element 20 is disposed in each opening 61e. More specifically, the three openings 61e1, 61e2, and 61e3 are disposed in this order in the +Y direction. For example, the first light-emitting element 21 is disposed in the opening (first opening) 61e1, the second light-emitting element 22 is disposed in the opening (second opening) 61e2, and the third light-emitting element 23 is disposed in the opening (third opening) 61e3.

[0034] As shown in FIG. 3 , the covering member 71 is disposed on the support member 10 and covers the first light-emitting element 21, the second light-emitting element 22, the third light-emitting element 23, and the second conductive portion 34. Because the first conductive portion 33 is disposed on the first surface 10a, the covering member 71 also covers the first conductive portion 33, which is not shown in FIG. 3 . The covering member 71 is made of an insulating material, for example, an insulating inorganic material. The linear expansion coefficient of the covering member 71 is greater than the linear expansion coefficient of the support member 10. The covering member 71 is, for example, a white light-reflecting member. The covering member 71 is formed of, for example, a white resin. The covering member 71 may contain a light-reflecting material. Examples of light-reflecting materials include titanium oxide, zinc oxide, silicon oxide, zirconium oxide, aluminum oxide, and aluminum nitride.

[0035] 3 and 5 , the first conductive portion 33 and the second conductive portion 34 are disposed below the covering member 71, i.e., on the first surface 10a of the support member 10, and extend in the X direction. The third conductive portion 31 and the fourth conductive portion 32 are disposed above the covering member 71 and extend in the Y direction.

[0036] The third conductive portion 31 is electrically connected to the first conductive portion 33 through a via 31c that penetrates the covering member 71. Although not shown in Fig. 3, the multiple fourth conductive portions 32 are electrically connected to the multiple second conductive portions 34 through multiple vias that penetrate the covering member 71. In other words, the covering member 71 is an interlayer insulating film in a multilayer wiring structure.

[0037] 5 , in a portion where the second conductive portion 34 and the fourth conductive portion 32 overlap in a plan view, the minimum length 34L of the second conductive portion 34 in the Y direction is shorter than the minimum length 32L of the fourth conductive portion 32 in the X direction. That is, 34L<32L.

[0038] 5, in plan view, the minimum length 31L of the third conductive portion 31 in the X direction is longer than the minimum length 32L of the fourth conductive portion 32. That is, 31L>32L.

[0039] In the cross-sectional view shown in FIG. 3 , the minimum length in the Z direction of the third conductive portion 31, i.e., thickness 31T, is thicker than the thickness 34T of the second conductive portion 34. Furthermore, the thickness 35T of the fifth conductive portion 35 is also thicker than the thickness 34T of the second conductive portion 34. The thickness of the first conductive portion 33 (not shown in FIG. 3 ) is approximately the same as the thickness of the second conductive portion 34, and the thickness 31T of the third conductive portion 31 is thicker than the thickness of the first conductive portion 33. Furthermore, the thickness of the fourth conductive portion 32 (not shown in FIG. 3 ) is approximately the same as the thickness 31T of the third conductive portion 31, and is thicker than both the thickness of the first conductive portion 33 and the thickness 34T of the second conductive portion 34.

[0040] 3 , in the panel 200, a support member 10, a covering member 71, and a protective member 74 are stacked in this order from the −Z direction side to the +Z direction side. The light emitting elements 20, the first conductive portion 33, the second conductive portion 34, and the light adjustment member 61 are disposed between the support member 10 and the covering member 71. The third conductive portion 31, the fourth conductive portion 32, the anisotropic connection member 72, and the first control unit 51 are disposed between the covering member 71 and the protective member 74.

[0041] The first control unit 51 is disposed in the control unit mounting region 15. The first control unit 51 is electrically connected to at least one first light-emitting element 21 among the plurality of first light-emitting elements 21 via at least one third conductive portion 31 among the plurality of third conductive portions 31 and at least one fourth conductive portion 32 among the plurality of fourth conductive portions 32. For example, the first control unit 51 is electrically connected to all of the first light-emitting elements 21, all of the second light-emitting elements 22, and all of the third light-emitting elements 23. The first control unit 51 is, for example, an IC (integrated circuit) chip. Note that the first control unit 51 may be composed of multiple chips. The first control unit 51 is electrically connected to the plurality of third conductive portions 31 and the plurality of fourth conductive portions 32 via anisotropic connecting members 72.

[0042] The anisotropic connecting member 72 contains a conductive material. For example, the conductive material is sandwiched between the first control unit 51 and the first conductive unit 31 so as to contact both, thereby electrically connecting the first control unit 51 and the first conductive unit 31 via the conductive material. The anisotropic connecting member 72 includes, for example, an anisotropic conductive paste and an anisotropic conductive film. By using the anisotropic connecting member 72, it is easier to reduce the thickness compared to when an isotropic connecting member such as solder is used, and short-circuiting is less likely to occur even when the first conductive unit 31 and the second conductive unit 32 are spaced apart. Note that, instead of the anisotropic connecting member 72, an isotropic connecting member may be used as the member electrically connecting the first control unit 51 and the fifth conductive unit 35.

[0043] The first control unit 51 is also connected to the fifth conductive unit 35 via an anisotropic connecting member 72. In the wiring connection region 12, the fifth conductive unit 35 is connected to a wiring 302 of the flexible wiring 300 via a connecting member 73. The wiring 302 extends in the X direction.

[0044] The protective member 74 is disposed on the covering member 71, and covers the third conductive portion 31, the fourth conductive portion 32, the first conductive portion 33, the second conductive portion 34, the anisotropic connecting member 72, and the first control unit 51. The protective member 74 does not cover the connecting member 73 or the flexible wiring 300.

[0045] In the panel 200a, units 29 are periodically arranged in the X and Y directions. As described above, each unit 29 is composed of one first light-emitting element 21, one second light-emitting element 22, and one third light-emitting element 23 arranged adjacent to each other in the Y direction. Note that each unit 29 may be composed of one or two of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23, or may be composed of four or more light-emitting elements 20. Each unit 29 may include two or more of any of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23.

[0046] In panel 200b, the units 29 are arranged at a lower density than in panel 200a. For example, the arrangement density of the units 29 in panel 200b is ½ times the arrangement density of the units 29 in panel 200a. In panel 200c, the units 29 are arranged at a lower density than in panel 200b. For example, the arrangement density of the units 29 in panel 200c is ½ times the arrangement density of the units 29 in panel 200b. In other words, the arrangement density of the units 29 in panel 200c is ¼ times the arrangement density of the units 29 in panel 200a.

[0047] The panels 200b and 200c are configured similarly to the panel 200a except for the arrangement density of the units.

[0048] The panel 200 arranged at one end of the display device 1 is also referred to as the "primary panel," and the other panels 200 are also referred to as "secondary panels." The first control units 51 of all the panels 200 are bus-connected via flexible wiring 300. The primary panel may be any of panels 200a, 200b, and 200c. FIG. 1 shows an example in which the primary panel is one of the panels 200c.

[0049] 8, the first control unit 51 has a conversion unit 51c, a storage unit 51d, and a current output unit 51e. Image data D1 in a first format is input to the conversion unit 51c from outside the display device 1 via the flexible wiring 300. The conversion unit 51c converts the image data D1 in the first format into image data D2 in a second format and outputs the image data D2 to the storage unit 51d. The storage unit 51d temporarily holds the image data D2 for all panels 200 and outputs the portion of the image data D2 to be displayed on the secondary panel to the flexible wiring 300.

[0050] A first potential V1 and a second potential V2 are supplied to the current output unit 51e. The first potential V1 is higher than the second potential V2. The current output unit 51e applies the first potential V1 to the third conductive unit 31. The current output unit 51e also controls the magnitude of the current input from the fourth conductive unit 32 and / or the time for which the current flows, based on image data D2 stored in the memory unit 51d. In this way, the first control unit 51 controls the light emission of the multiple light-emitting elements 20 of the single panel 200 to which the first control unit 51 belongs.

[0051] In the secondary panel, the conversion unit 51c of the first control unit 51 takes in the portion of the second-format image data D2 input via the flexible wiring 300 that is to be displayed by the panel 200 on which the first control unit 51 is provided, and stores it in the memory unit 51d. The current output unit 51e controls the light emission of the plurality of light-emitting elements 20 of the panel 200 based on the image data D2 stored in the memory unit 51d.

[0052] In this way, image data D1 in the first format input from outside the display device 1 is supplied only to the first control unit 51 of the primary panel, and image data D2 in the second format output from the first control unit 51 of the primary panel is supplied to the first control unit 51 of the secondary panel. The first control unit 51 of each secondary panel stores only the portion of the image data D2 flowing through the flexible wiring 300 that corresponds to that panel.

[0053] Alternatively, the conversion unit 51c may be connected to an external memory 400 provided outside the display device 1, and the image data D2 converted by the conversion unit 51c may be temporarily stored in the external memory 400, after which the image data D2 corresponding to each panel 200 may be sequentially output to the storage unit 51d, and then sequentially output from the storage unit 51d to the flexible wiring 300. This allows the capacity of the storage unit 51d to be reduced.

[0054] An arrangement of light-emitting elements in a panel and a specific configuration example of the light-emitting elements will be described. FIG. 9A is a schematic plan view illustrating a light-emitting element and its periphery in a display device according to this embodiment. FIG. 9B is a schematic cross-sectional view taken along line IXB-IXB in FIG. 9A. FIG. 9C is a schematic plan view illustrating a light-emitting element and its periphery in a display device according to a second modification of this embodiment. As shown in FIGS. 9A and 9B, a first light-emitting element 21 is disposed on the first surface 10a of the support member 10 within the opening 61e. A bonding member 94 is disposed between the light extraction surface 21a of the first light-emitting element 21 and the first surface 10a. The bonding member 94 is made of a light-transmitting material, such as an organic material. The bonding member 94 is provided to stably dispose and fix the first light-emitting element 21 on the support member 10.

[0055] The first conductive portion 33 and the second conductive portion 34 are disposed on the light adjustment member 61 disposed on the first surface 10a. The first conductive portion 33 and the second conductive portion 34 are disposed on the first surface 10a in the opening 61e. The first conductive portion 33 is disposed on the side surface 21c and the electrode formation surface 21b of the first light-emitting element 21 and is connected to the first electrode 21e at the electrode formation surface 21b. The second conductive portion 34 is disposed on the side surface 21c and the electrode formation surface 21b of the first light-emitting element 21 and is connected to the second electrode 21f at the electrode formation surface 21b. The first conductive portion 33 and the second conductive portion 34 include, for example, Al or Cu. The first conductive portion 33 and the second conductive portion 34 may be made of a light-transmitting conductive material such as ITO.

[0056] As described with reference to Figures 3, 7A, and 7B, the light adjustment member 61 is made of a resin material or metal material having light absorption properties. For example, the light adjustment member 61 can be made of an insulating resin material such as acrylic, polyimide, or siloxane. These resins can be made light absorbing by adding black pigments such as carbon black, or graphite. Having light absorption properties means that the reflectance of the light adjustment member 61 is 0% or more and 50% or less, and more preferably 0% or more and 40% or less, with respect to the emission peak wavelength of the light-emitting element.

[0057] When the light adjustment member 61 is made of a metal material instead of a resin material, it may be made of, for example, chromium (Cr), etc. When the light adjustment member 61 is made of a metal material, an insulating material is applied to the surface of the light adjustment member 61 in order to electrically separate the first conductive portion 33 and the second conductive portion 34 on the light adjustment member 61.

[0058] The thickness 61T of the light adjusting member 61 can be, for example, 0.5 μm or more and 15 μm or less. The thickness 61T of the light adjusting member 61 is preferably 1 μm or more and 10 μm or less. When the light adjusting member 61 is made of a resin material, sufficient light absorption can be achieved by setting the thickness to 1 μm or more and 15 μm or less.

[0059] When the light adjustment member 61 is made of a metal material, the thickness can be thinner than when it is made of a resin material. For example, by using Cr or a metal material containing Cr for the light adjustment member 61, the thickness 61T of the light adjustment member 61 can be set to 0.5 μm or more and 10 μm or less, including the thickness of the insulating film formed on the surface.

[0060] The thickness 21T of the first light-emitting element 21, including the thickness of the bonding member 94, is approximately 3 μm to 10 μm, and it is desirable that the thickness 61T of the light adjustment member 61 be sufficiently thinner than the thickness 21T of the first light-emitting element 21.

[0061] The light reflecting member 92 is disposed on the first light emitting element 21. The light reflecting member 92 covers the side surface 21c, the electrode forming surface 21b, the first conductive portion 33, and the second conductive portion 34 of the first light emitting element 21. In the example of FIG. 9A , the light reflecting member 92 covers a portion of the light adjustment member 61 and the first surface 10a exposed from the light adjustment member 61. The light reflecting member 92 is made of a material having light reflectivity. The light reflecting member 92 is made of, for example, white resin. Similar to the first light emitting element 21, the light reflecting member 92 is disposed so as to cover the side surface and electrode forming surface of each of the second light emitting element 22 and the third light emitting element.

[0062] By placing the light reflecting member 92, the light emitted from the side surface 21c and the electrode forming surface 21b of the first light emitting element 21 is reflected toward the light extraction surface 21a, thereby improving the light extraction efficiency of the first light emitting element 21.

[0063] 9C , the display device 1b according to this modification further includes a wavelength conversion member 96 between the light adjustment member 61 and the first surface 10a. The wavelength conversion member 96 includes, for example, a phosphor, and converts blue light emitted from the first light-emitting element 21 into green light or red light. By disposing the wavelength conversion member 96 that converts blue light into green in the first light-emitting element 21 that emits blue light, the second light-emitting element 22 can be easily configured. By disposing the wavelength conversion member 96 that converts blue light into red in the first light-emitting element 21, the third light-emitting element 23 can be easily configured.

[0064] Fig. 10A is a schematic cross-sectional view illustrating a light-emitting element in the display device according to this embodiment. Fig. 10B is a schematic enlarged view of the XB portion of Fig. 10A. As shown in Figs. 10A and 10B, the first light-emitting element 21 has a first electrode 21e, a second electrode 21f, and a semiconductor portion 21d. One surface of the semiconductor portion 21d is a light extraction surface 21a. The surface opposite the light extraction surface 21a is an electrode formation surface 21b. The first electrode 21e and the second electrode 21f are arranged apart from each other on the electrode formation surface 21b.

[0065] The semiconductor portion 21d includes an n-type layer 21d1, a p-type layer 21d2, and an active layer 21d3. The active layer 21d3 is disposed between the n-type layer 21d1 and the p-type layer 21d2. The n-type layer 21d1, the active layer 21d3, and the p-type layer 21d2 are stacked in this order from the −Z direction to the +Z direction. For example, the active layer 21d3 may include multiple barrier layers and multiple well layers, and may have a multiple quantum well structure in which the barrier layers and well layers are stacked alternately.

[0066] The semiconductor portion 21d has a recess R in the electrode formation surface 21b. The n-type layer 21d1 is exposed in the recess R. The p-type layer 21d2 is exposed outside the recess R. At the boundary of the recess R, the electrode formation surface 21b has a step, and the n-type layer 21d1, the active layer 21d3, and the p-type layer 21d2 are exposed.

[0067] The second electrode 21f is disposed on the n-type layer 21d1 in the recess R and is connected to the n-type layer 21d1. The first electrode 21e is disposed on the p-type layer 21d2 outside the recess R and is connected to the p-type layer 21d2.

[0068] 10A, a current diffusion layer 21g is disposed between the first electrode 21e and the p-type layer 21d2. The current diffusion layer 21g is made of, for example, ITO (Indium Tin Oxide), AZO (Aluminum Zinc Oxide), IZO (Indium Zinc Oxide), or Ga ２ O ３ A conductive oxide film such as the above can be used.

[0069] The first light-emitting element 21 further includes a first reflective layer 21h and a second reflective layer 21j. The first reflective layer 21h covers the electrode-forming surface 21b. The first reflective layer 21h has insulating properties. The first reflective layer 21h covers the current-spreading layer 21g. The first reflective layer 21h covers at least a portion of the first electrode 21e and at least a portion of the second electrode 21f. The first reflective layer 21h reflects light emitted from the active layer 21d3 and traveling toward the electrode-forming surface 21b. The first reflective layer 21h reflects light emitted toward the electrode-forming surface 21b toward the light-extraction surface 21a, thereby improving the light extraction efficiency of the first light-emitting element 21.

[0070] The second reflective layer 21j is selectively disposed on the first reflective layer 21h. The second reflective layer 21j includes, for example, an Al layer, a Ti layer, or a laminated structure thereof. The second reflective layer 21j, together with the first reflective layer 21h, reflects light traveling toward the electrode formation surface 21b toward the light extraction surface 21a, thereby improving the light extraction efficiency of the first light-emitting element 21.

[0071] The insulating layer 21k covers a portion of the first electrode 21e, a portion of the second electrode 21f, the first reflective layer 21h, and the second reflective layer 21j. The insulating layer 21k covers the side surface 21c of the semiconductor portion 21d. The insulating layer 21k includes, for example, an oxide of Si. The first electrode 21e and the second electrode 21f are exposed from the insulating layer 21k, and therefore the exposed first electrode 21e and second electrode 21f are connected to the first conductive portion 33 and the second conductive portion 34, respectively.

[0072] As shown in Figures 10A and 10B, the light extraction surface 21a is a surface of the n-type layer 21d1. Preferably, as shown in Figure 10B, a plurality of convex portions U are arranged on the light extraction surface 21a. The light extraction surface 21a is an uneven surface including inclined surfaces U1 of the convex portions U, for example, a rough surface on which a plurality of convex portions having inclined surfaces of various shapes and different angles are randomly arranged. Figure 10B shows a virtual plane PV1 parallel to the first surface 10a. The interior angle θ between the inclined surface U1 and the plane PV1 is equal to or greater than 1° and equal to or less than 90°.

[0073] Since the light extraction surface 21a includes the convex portion U having the inclined surface U1, when the first light emitting element 21 is not emitting light or is emitting only weak light, if external light is irradiated from the support member 10 and the mounting substrate 100, the light reflected by the light extraction surface 21a is scattered, making it appear as if the first light emitting element 21 does not exist from the outside. This improves the contrast of the display device 1.

[0074] A first protective film 21m is disposed on the outer periphery of the light extraction surface 21a. A second protective film 21n covers the first protective film 21m and the light extraction surface 21a. The second protective film 21n covering the light extraction surface 21a has concaves and convexes corresponding to the convex portions of the light extraction surface 21a.

[0075] The second light emitting element 22 and the third light emitting element 23 have the same configuration.

[0076] Fig. 11A is a schematic plan view illustrating a light-emitting element and its periphery in a display device according to a third modified example of this embodiment. Fig. 11B is a schematic cross-sectional view taken along line XIB-XIB in Fig. 11A. As shown in Figs. 11A and 11B, the first conductive portion 33 includes a first conductive film 33d, and the second conductive portion 34 includes a second conductive film 34d. The first conductive film 33d is disposed on the first electrode 21e and connected to the first electrode 21e. The second conductive film 34d is disposed on the second electrode 21f and connected to the second electrode 21f.

[0077] 11A , the first conductive film 33d covers approximately half of the electrode formation surface 21b of the first light-emitting element 21, and the second conductive film 34d covers the remaining half of the electrode formation surface 21b. Covering the electrode formation surface 21b with the first conductive film 33d and the second conductive film 34d can serve as light-reflecting members. Therefore, light emitted toward the electrode formation surface 21b can be reflected toward the light extraction surface 21a, improving the light extraction efficiency of the first light-emitting element 21.

[0078] The first conductive film 33d and the second conductive film 34d may be disposed so as to cover the side surface 21c. By disposing a light-reflective conductive film on the side surface 21c, light emitted from the side surface 21c can be reflected toward the light extraction surface 21a. This improves the light extraction efficiency of the first light-emitting element 21.

[0079] The second light-emitting element 22 and the third light-emitting element 23 may also have a similar configuration.

[0080] FIG. 12A is a schematic plan view illustrating a light-emitting element and its periphery in a display device according to a fourth modified example of this embodiment. FIG. 12B is a schematic cross-sectional view taken along line XIIB-XIIB in FIG. 12A . As shown in FIGS. 12A and 12B , a display device 1d according to this modified example includes light adjustment members 61, 61-1, and 61-2. The light adjustment member 61 is disposed on the first surface 10a. The light adjustment member 61 includes an opening 61a. In this modified example, the first surface 10a is not exposed between the first light-emitting element 21 disposed in the opening 61a and the light adjustment member 61. The light adjustment member 61-1 is disposed on the side surface 21c of the first light-emitting element 21. The light adjustment member 61-2 is disposed on the electrode formation surface 21b of the first light-emitting element 21. A portion of the first electrode 21e is exposed from the light adjustment member 61-2. A part of the second electrode 21f is exposed from the light adjusting member 61-2. The light adjusting members 61, 61-1, and 61-2 are continuous.

[0081] The first conductive portion 33 is disposed on the light adjustment members 61, 61-1, and 61-2. The first conductive portion 33 is connected to the first electrode 21e exposed from the light adjustment member 61-2. The second conductive portion 34 is disposed on the light adjustment members 61, 61-1, and 61-2. The second conductive portion 34 is connected to the second electrode 21f exposed from the light adjustment member 61-2.

[0082] That is, the first light-emitting element 21 is covered by the light adjustment members 61, 61-1, 61-2, the first conductive portion 33, and the second conductive portion 34. When the first light-emitting element 21 does not emit light or emits weak light, and is irradiated with external light through the support member 10 and the mounting substrate 100, the light adjustment members 61-1, 61-2 absorb the irradiated external light, and therefore, the first light-emitting element 21 can be made invisible from the outside. This can improve the contrast of the display device 1.

[0083] 13 is a schematic plan view illustrating one panel of a display device according to a fifth modified example of the present embodiment. As shown in FIG. 13 , in the panel of the display device 1f according to this modified example, the third conductive portion 31f is arranged adjacent to the arrangement of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 in each element region 13. In the XY plane view, the third conductive portion 31f does not overlap with the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23.

[0084] 13, the minimum length 31fL in the X direction of the third conductive portion 31f is longer than the minimum length 32L in the X direction of the fourth conductive portion 32. The minimum length 31fL may be equal to the minimum length 32L.

[0085] As described in relation to FIG. 6 , the first electrodes of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 in the same element region 13 are connected to the third conductive portion 31f, and current can flow simultaneously through the third conductive portion 31f. The first control unit 51, which supplies current to the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23, is located in the control unit mounting region 15, which is spaced apart from the image forming region 11 in the −Y direction. Therefore, the longer the length of the panel 200 in the Y direction, the longer the distance from the first control unit 51 to the more distant light-emitting element, and the lower the voltage that can be applied to the more distant light-emitting element. As described above, the minimum lengths 31L and 31fL of the third conductive portion can be determined taking into account the voltage drop that occurs depending on the distance from the first control unit 51, allowing for a high degree of freedom in the design of the panel 200.

[0086] A method for manufacturing the display device 1 according to this embodiment will be described. Figures 14A to 14L are schematic cross-sectional views illustrating part of the manufacturing process for the display device according to this embodiment. In the description using Figures 14A to 14L, the same components as those described in relation to Figures 1 to 13 are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

[0087] As shown in FIG. 14A , an intermediate member 1000a is prepared. In this specification, preparation includes manufacturing or receiving, including purchasing. The intermediate member 1000a is a support member 1010 having a light adjustment member 61. The support member 10 shown in FIG. 2 and other figures is formed by cutting the support member 1010. The support member 1010 has a first surface 10a and a second surface 10b. As described in relation to FIG. 7A and other figures, the light adjustment member 61 has an opening 61a arranged according to the position of the light-emitting element. The first surface 10a is exposed from the opening 61a.

[0088] The intermediate member 1000a is formed, for example, by forming a mask by photolithography using photoresist placed on a light adjustment member formed on the entire first surface 10a, and then etching and removing the light adjustment member exposed from the mask.

[0089] 14B , an intermediate member 1000b is formed. When forming the intermediate member 1000a, a bonding layer 1094 is formed on the intermediate member 1000a. The bonding layer 1094 is formed on the first surface 10a in the opening 61a. The bonding layer 1094 is formed on the light adjustment member 61 in the region other than the opening 61a.

[0090] 14C , an intermediate member 1000c is formed. In forming the intermediate member 1000c, the first light-emitting element 21 is disposed at the position of the opening 61a. The first light-emitting element 21 is disposed at the position of the opening 61a such that the light extraction surface 21a faces the bonding layer 1094.

[0091] As shown in Fig. 14D, an intermediate member 1000d is formed. In forming the intermediate member 1000d, a portion of the bonding layer 1094 shown in Fig. 14C is left as the bonding member 94, and the portion other than the bonding member 94 is removed. The bonding member 94 is a layer between the light extraction surface 21a and the first surface 10a. The bonding layer 1094 is removed by, for example, wet etching or dry etching.

[0092] As shown in FIG. 14E , an intermediate member 1000e is formed. In forming the intermediate member 1000e, a first conductive portion 33 and a second conductive portion 34 are formed. The first conductive portion 33 and the second conductive portion 34 are formed on the light adjustment member 61. The first conductive portion 33 and the second conductive portion 34 are also formed on the first surface 10a exposed from the light adjustment member 61. The first conductive portion 33 is also formed on the side surface 21c of the first light-emitting element 21, and the second conductive portion 34 is also formed on the side surface 21c of the first light-emitting element 21. The first conductive portion 33 and the second conductive portion 34 are also formed on the electrode formation surface 21b of the first light-emitting element 21.

[0093] When the first conductive portion 33 is formed, the first conductive portion 33 is connected to the first electrode 21 e on the electrode formation surface 21 b. When the second conductive portion 34 is formed, the second conductive portion 34 is connected to the second electrode 21 f on the electrode formation surface 21 b.

[0094] The first conductive portion 33 and the second conductive portion 34 can be formed by sputtering Al, Cu, etc. Preferably, the first conductive portion 33 and the second conductive portion 34 are made of the same material and are formed simultaneously.

[0095] As shown in FIG. 14F, an intermediate member 1000f is formed. In FIGS. 14F to 14L, the image forming region 11, the control unit mounting region 15, and the wiring connection region 12 are collectively shown. Furthermore, the first light-emitting element 21 and the second light-emitting element 22 are shown separately to clearly show the interconnection relationship between the first conductive portion 33, the second conductive portion 34, and the third conductive portion 31. Although not shown in FIGS. 14F to 14L, the third light-emitting element 23 is connected to the first conductive portion 33, the second conductive portion 34, and the third conductive portion 31 in the same manner as the first light-emitting element 21 and the second light-emitting element 22. Although not shown in FIGS. 14F to 14L, the fourth conductive portion 32 is connected to the second conductive portion 34 in the same manner as the third conductive portion 31.

[0096] In forming the intermediate member 1000f, a covering member 71 is formed on the intermediate member 1000e shown in FIG. 14E. The covering member 71 is formed to cover the light adjustment member 61, the first light-emitting element 21, the second light-emitting element 22, the first conductive portion 33, and the second conductive portion 34. In the covering member 71, through-holes 71V are formed at positions where vias connecting the first conductive portion 33 and the third conductive portion 31 will be formed. The through-holes 71V are formed by forming a mask using photolithography on a photoresist placed on the covering member formed on the entire surface, and then removing the covering member by wet etching or dry etching. Alternatively, the covering member 71 may be made of a photosensitive material and processed using an exposure and development process.

[0097] 14G , an intermediate member 1000g is formed. In forming the intermediate member 1000g, a seed metal layer 1030 is formed on the covering member 71. In the through holes 71V, the seed metal layer 1030 covers the side walls of the through holes 71V. The seed metal layer 1030 covers the first conductive portions 33 exposed from the covering member 71 by the through holes 71V.

[0098] 14H, an intermediate member 1000h is formed. In forming the intermediate member 1000h, a mask 1001 is formed on the seed metal layer 1030. The mask 1001 is formed by patterning a photoresist formed on the entire surface of the seed metal layer 1030 by photolithography.

[0099] 14I, an intermediate member 1000i is formed. In forming the intermediate member 1000i, the third conductive portion 31a and the fifth conductive portion 35a are formed. For the third conductive portion 31a and the fifth conductive portion 35a, a wiring layer with sufficient thickness can be formed by growing a Cu layer by, for example, electrolytic plating.

[0100] As shown in FIG. 14J, an intermediate member 1000j is formed. When forming the intermediate member 1000j, the mask 1001 shown in FIG. 14I is removed. Simultaneously with or after removing the mask 1001, the seed metal layer 1030 between the mask 1001 and the covering member 71 is removed, thereby forming the third conductive portion 31 and the fifth conductive portion 35. The mask 1001 is removed by, for example, wet etching or dry etching. The third conductive portion 31 is integrally formed by the third conductive portion 31a and the seed metal layer 31b below the third conductive portion 31a. The third conductive portion 31a grows to fill the through hole 71V during the formation of the third conductive portion 31a, so that a via 31c is formed integrally with the third conductive portion 31a at the position of the through hole 71V. The fifth conductive portion 35 is integrally formed by the seed metal layer 35b below the fifth conductive portion 35a.

[0101] 14K, an intermediate member 1000k is formed. In forming the intermediate member 1000k, the anisotropic connecting member 72 is disposed in the control unit mounting region 15. Furthermore, the connecting member 73 is disposed in the wiring connection region 12.

[0102] Thereafter, the first control unit 51 is placed on the anisotropic connection member 72 .

[0103] The anisotropic connecting member 72 is, for example, ACF or ACP. The anisotropic connecting member 72 establishes conductivity in the direction of pressure. In the example of FIG. 14K , applying force to the anisotropic connecting member 72 in the control unit mounting region 15 in the directions of the arrows F1 and F2 establishes electrical connection between the terminal of the first control unit 51 and the third conductive part 31 that overlaps the terminal in the XY plane. Applying force in the directions of the arrows F1 and F2 also establishes electrical connection between the wiring on the flexible wiring 300 side of the first control unit 51 and the fifth conductive part 35 that overlaps the wiring in the XY plane.

[0104] 14L, an intermediate member 1000l is formed. In forming the intermediate member 1000l, a protective member 74 is formed to cover the image forming area 11 and the control unit mounting area 15. The protective member 74 covers at least the third conductive portion 31 and the fifth conductive portion 35, protecting them from the external environment.

[0105] The support member 1010 is then cut into the support members 10 shown in FIG. 2 and other figures, thereby forming the panel 200 shown in FIG. 2 . The formed panel 200 is then placed at a predetermined position on the mounting substrate 100. Furthermore, a flexible wiring 300 is placed on the connecting member 73. The connecting member 73 is also preferably an ACF or ACP. In the wiring connection region 12, electrical connection is established between the wiring of the flexible wiring 300 and the fifth conductive portion 35 that overlaps the wiring in the XY plane by applying force to the connecting member 73 in the direction of the arrow F3 shown in the figure. In this manner, the display device 1 can be formed. The cut panels 200 can be individually inspected before being placed at a predetermined position on the mounting substrate 100.

[0106] As described in relation to Figures 14H to 14J, it is preferable to increase the thickness of the third conductive portion 31 and the fourth conductive portion 32 by plating growth. On the other hand, when forming a small-sized panel in which the impact of voltage drop due to the third conductive portion 31 and the fourth conductive portion 32 is small, the plating growth process may be omitted. In this case, the third conductive portion 31 and the fourth conductive portion 32 can also be formed only by a sputtering process using Al or the like. By omitting the plating process, the manufacturing process can be shortened.

[0107] The effects of the display device 1 according to this embodiment will be described. The display device 1 according to this embodiment displays an image by controlling and lighting up each of the plurality of self-luminous light-emitting elements 20. This allows for reduced power consumption compared to when an image is displayed using a liquid crystal panel.

[0108] 1 , in the display device 1, any number of panels 200a, 200b, and 200c can be arranged in any order in the first direction X. This allows the panels 200a to be arranged in positions where high resolution display is required, and the panels 200c to be arranged in positions where low resolution is sufficient, in accordance with the image displayed by the display device 1. As a result, the resolution of each part of the display device 1 can be adjusted in accordance with the image, and the cost of the display device 1 can be reduced.

[0109] 3 , 7A, and 7B , a light-absorbing light adjustment member 61 is disposed around each of the light-emitting elements 20. The first conductive portion 33 and the second conductive portion 34 are disposed on the +Z direction side of the light adjustment member 61, and the third conductive portion 31 and the fourth conductive portion 32 are disposed further away from the light adjustment member 61 in the +Z direction via a covering member. This prevents external light that has passed through the mounting substrate 100 and the support member 10 from reaching the first conductive portion 33, the second conductive portion 34, the third conductive portion 31, and the fourth conductive portion 32. As a result, the external light reflected by the first conductive portion 33 and the second conductive portion 34 can be prevented from affecting the image, thereby improving the contrast of the image.

[0110] In addition, in this embodiment, the light-emitting element 20 has a light-extraction surface that is a rough surface including a plurality of protrusions having inclined surfaces at different angles, thereby scattering external light reflected at the light-extraction surface. By scattering the reflected light at the light-extraction surface, the light-emitting element can be made invisible from the outside, and the contrast of the image at low brightness can be improved.

[0111] The light adjustment member 61 can be made of a versatile insulating resin material, such as acrylic, polyimide, or siloxane mixed with a black pigment, and can be easily formed on the first surface 10a at low cost. As shown in Fig. 9B, by imparting appropriate light absorption properties, the thickness of the light adjustment member can be made thinner than the thickness of the first light-emitting element, thereby achieving a thin display device 1.

[0112] A metal material with high light absorption can be used for the light adjustment member 61. When Cr is used as the metal material, the thickness can be made thin with high precision to 0.5 μm or more and 10 μm or less, and sufficient light absorption can be achieved. This makes it easy to make the display device 1 thinner.

[0113] 12A and 12B, the light adjustment members can be disposed around the first light-emitting element 21, and also on the electrode formation surface 21b and side surface 21c of the first light-emitting element 21. By disposing the light adjustment members 61-1 and 61-2, it is possible to absorb external light that has passed through the first light-emitting element 21 and is reflected by the electrode formation surface 21b and side surface 21c. Therefore, it is possible to suppress the effect of external light on an image and improve the contrast of the image.

[0114] 9A and 9B , a light reflecting member 92 can be disposed to cover the electrode formation surface 21 b and the side surface 21 c of the first light emitting element 21. By disposing the light reflecting member 92, light emitted by the first light emitting element 21 toward the electrode formation surface 21 b and the side surface 21 c can be reflected toward the light extraction surface 21 a, thereby improving the light extraction efficiency of the first light emitting element 21.

[0115] The light reflecting member 92 can be disposed for each light emitting element 20, and the amount of material required to form the light reflecting member 92 can be reduced, thereby reducing manufacturing costs.

[0116] 11A and 11B , the first conductive film 33 d and the second conductive film 34 d may be disposed on the electrode formation surface 21 b so as to cover most of the electrode formation surface 21 b, thereby allowing the first conductive film 33 d and the second conductive film 34 d to reflect light emitted toward the electrode formation surface 21 b toward the light extraction surface 21 a, thereby improving the light extraction efficiency.

[0117] Furthermore, the first conductive film 33d and the second conductive film 34d may be disposed so as to cover the side surface 21c of the light emitting element 20. This allows the light emitted to the side surface 21c to be reflected toward the light extraction surface 21a by the first conductive film 33d and the second conductive film 34d, thereby improving the light extraction efficiency.

[0118] Furthermore, in this embodiment, in a plan view, one of the multiple first light-emitting elements 21 is arranged to overlap one of the multiple third conductive portions 31, and this one first light-emitting element 21 is electrically connected to this one third conductive portion 31. By arranging the first light-emitting element 21 and the third conductive portion 31 to overlap in this way, heat generated from the first light-emitting element 21 can be dissipated via the third conductive portion 31, thereby improving heat dissipation and enabling the panel 200 to be made smaller. Furthermore, by connecting the overlapping third conductive portion 31 and the first light-emitting element 21, the first conductive portion 33 can be shortened.

[0119] Second Embodiment Fig. 15 is a schematic plan view illustrating a display device according to this embodiment. Figs. 16A to 16D are schematic views showing the operation of the display device according to this embodiment. In Figs. 16A to 16D, the operation progresses from Fig. 16A to Fig. 16B to Fig. 16C and Fig. 16D as time progresses. In Figs. 16A to 16D, the same reference numerals are used to denote image data that are input at the same timing. Specifically, the reference numerals "A", "B", "C", ... "P" are used in order of earliest input timing.

[0120] 15 and 16A to 16D, in the display device 2 according to this embodiment, multiple panels 200 are connected in a daisy chain. That is, image data D1 is input only to the first control unit 51 of the first-stage panel 200. The conversion unit 51c of the first control unit 51 of the first-stage panel 200 converts the image data D1 into image data D2 and inputs the image data D2 into the first-stage memory cell of the storage unit 51d. When new image data D2 is input, the storage unit 51d moves the image data D2 previously stored in the memory cell one stage later, and outputs the image data D2 stored in the final-stage memory cell to the first control unit 51 of the second-stage panel 200.

[0121] In the first control unit 51 of the second or subsequent panel 200, when image data D2 is input from the previous panel 200, the first control unit 51 inputs the image data D2 to the first memory cell of the storage unit 51d, moves the image data D2 stored up to that point to the memory cell one stage later, and outputs the image data D2 stored in the final memory cell to the first control unit 51 of the next subsequent panel 200. In this way, the image data input to the first panel 200 is sent to the subsequent panels 200 in sequence.

[0122] Then, when the image data D2 is input to all memory cells of the storage units 51d of all panels 200, the current output units 51e of each panel 200 pass current to each light-emitting element 20 based on the image data D2 stored in the respective storage units 51d, causing each light-emitting element 20 to emit light. In this way, the display device 2 displays an image.

[0123] According to this embodiment, by daisy-chaining a plurality of panels 200, it is not necessary to store all of the image data D2 in the storage unit 51d of the first panel 200. This allows the capacity of the storage unit 51d of the first panel 200 to be the same as the storage units 51d of the other panels 200. Alternatively, it is not necessary to use an external memory 400. As a result, the cost of the display device 2 can be reduced. Other configurations, operations, and effects of this embodiment are the same as those of the first embodiment.

[0124] Third Embodiment FIG. 17 is a schematic plan view illustrating a display device according to this embodiment. In a display device 3 according to this embodiment, all of the panels 200 are configured as high-resolution panels 200a. However, the first control unit 51 of each panel 200 may display images at different resolutions required for each panel 200. For example, one panel 200 displays images at the high resolution inherent to panel 200a. Another panel 200 displays images at the same medium resolution as panel 200b. Yet another panel 200 displays images at the same low resolution as panel 200c. When a certain panel 200 displays images at a resolution lower than the inherent resolution of panel 200a, some of the units 29 in that panel 200 may not be used.

[0125] According to this embodiment, panels of the same specification can be used for all panels 200, making it easy to rearrange the panels 200. Other configurations, operations, and effects of this embodiment are the same as those of the first embodiment.

[0126] Fourth Embodiment FIG. 18 is a schematic plan view illustrating a display device according to this embodiment. FIG. 19 is a schematic equivalent circuit diagram illustrating a display device according to this embodiment. As shown in FIGS. 18 and 19 , a display device 4 according to this embodiment includes a panel 200d. The panel 200d further includes a plurality of transistors 98, a plurality of sixth conductive portions 36a, 36b, and a plurality of seventh conductive portions 37. The panel 200d includes first conductive portions 33e, 33f instead of the first conductive portion 33 of the panel 200a shown in FIG. 2. The panel 200d includes a plurality of fourth conductive portions 32a to 32c instead of the plurality of fourth conductive portions 32. The panel 200d includes a third control portion 53 instead of the first control portion 51. The other configurations are similar to those of the panel 200a.

[0127] More specifically, one electrode of the first light-emitting element 21 is electrically connected to the third conductive portion 31 via a transistor 98a. The transistor 98a is electrically connected between the first conductive portions 33e and 33f. The other electrode of the first light-emitting element 21 is electrically connected to the fourth conductive portion 32a via the second conductive portion 34. Note that one electrode is, for example, the first electrode 21e, and the other electrode is, for example, the second electrode 21f, and so on.

[0128] One electrode of the second light-emitting element 22 is electrically connected to the third conductive portion 31 via the transistor 98b. The transistor 98b is electrically connected between the first conductive portions 33e and 33f. The other electrode of the second light-emitting element 22 is electrically connected to the fourth conductive portion 32b via the second conductive portion 34.

[0129] One electrode of the third light-emitting element 23 is electrically connected to the third conductive portion 31 via the transistor 98c. The transistor 98c is electrically connected between the first conductive portions 33e and 33f. The other electrode of the third light-emitting element 23 is electrically connected to the fourth conductive portion 32c via the second conductive portion 34.

[0130] The gate electrodes of the transistors 98a to 98c are electrically connected to one another via the sixth conductive portion 36a. The sixth conductive portion 36b is arranged contiguously with the plurality of sixth conductive portions 36a extending in the X direction, and is electrically connected to the gate electrodes of the transistors 98a to 98c.

[0131] The first light emitting element 21, the second light emitting element 22, and the third light emitting element 23 constitute one unit 29, and in one element region 13, the above-described configuration is repeatedly arranged along the Y direction.

[0132] The fourth conductive portions 32a to 32c are arranged in wiring regions 14 adjacent to one element region 13 and extend in the Y direction. The fourth conductive portion 32a electrically connects the other electrodes of the multiple first light-emitting elements 21 arranged in one element region 13 to each other. The fourth conductive portion 32b electrically connects the other electrodes of the multiple second light-emitting elements 22 arranged in one element region 13 to each other. The fourth conductive portion 32c electrically connects the other electrodes of the multiple third light-emitting elements 23 arranged in one element region 13 to each other.

[0133] A seventh conductive portion 37 is arranged in the wiring region 14, and the seventh conductive portion 37 extends in the Y direction. The seventh conductive portion 37 arranged in a wiring region 14 adjacent to one element region 13 is electrically connected to the sixth conductive portion 36b arranged in that element region 13. The number of seventh conductive portions 37 arranged is equal to the number of units 29 aligned in the Y direction, and in the example of FIG. 18 , no seventh conductive portion 37 is arranged in the wiring region 14 at the end in the +X direction.

[0134] The above-described configurations of the element region 13 and the wiring region 14 are repeatedly arranged in the X direction.

[0135] The third conductive portion 31 , the fourth conductive portions 32 a to 32 c and the seventh conductive portion 37 are electrically connected to the third control portion 53 .

[0136] The sixth conductive portions 36a and 36b are disposed on the first surface 10a of the support member 10, similar to the first conductive portions 33e and 33f and the second conductive portion 34. The fourth conductive portions 32a to 32c and the seventh conductive portion 37 are disposed on the covering member shown in FIG. 3, similar to the third conductive portion 31.

[0137] 3 and the like, the third conductive portion 31 is electrically connected to the first conductive portion 33 through a via that penetrates the covering member. Similarly, the fourth conductive portions 32a to 32c are electrically connected to the second conductive portion 34 through a via that penetrates the covering member, and the seventh conductive portion 37 is electrically connected to the sixth conductive portion 36b through a via that penetrates the covering member.

[0138] The transistors 98a to 98c are, for example, thin film transistors (TFTs). The sixth conductive portions 36a and 36b are, for example, wirings made of polysilicon. The sixth conductive portions 36a and 36b can be formed simultaneously with the gate electrodes of the transistors 98a to 98c, which are TFTs, by using an existing low-temperature polysilicon formation process (LTPS).

[0139] 18 , a third conductive portion 31 is disposed for each element region 13, and a constant DC voltage, for example, is applied to all of the third conductive portions 31 by the third control unit 53. The third conductive portions 31 are power supply lines for all of the light-emitting elements 20 that constitute the panel.

[0140] In the same element region 13, the fourth conductive portion 32a electrically connects the other electrodes of the plurality of first light-emitting elements 21 to each other, the fourth conductive portion 32b electrically connects the other electrodes of the plurality of second light-emitting elements 22 to each other, and the fourth conductive portion 32c electrically connects the other electrodes of the plurality of third light-emitting elements 23 to each other. Different fourth conductive portions 32a to 32c are provided for each element region 13, and all are electrically connected to the third control unit 53. The fourth conductive portions 32a to 32c supply current values ​​set by the third control unit 53 to the first to third light-emitting elements 21 to 23, respectively. The fourth conductive portions 32a to 32c are current signal lines for the first to third light-emitting elements 21 to 23.

[0141] If we refer to an arrangement of units 29 arranged in the X direction as a row and an arrangement of units 29 arranged in the Y direction as a column, the sixth conductive portions 36a, 36b and the seventh conductive portion 37 are electrically connected to the gate electrodes of the transistors 98 of units 29 in different columns in the same row. The third control unit 53 selects the units 29 in one row from the multiple rows via the seventh conductive portion 37. The seventh conductive portion 37 is a selection line that selects one row from the multiple rows. The third control unit 53 selects all of the units 29 in one row from the multiple rows by sequentially selecting the seventh conductive portions 37 and outputting a scanning signal. For example, the third control unit 53 selects the seventh conductive portion 37 from the −Y direction to the +Y direction, thereby driving the light-emitting elements 20 of all of the units 29 in the selected row with the current values ​​set in the fourth conductive portions 32a to 32c, which are current signal lines. In other words, the seventh conductive portion 37 is a scanning line that scans the row of units 29 in the column direction.

[0142] The effects of the display device 4 according to this embodiment will now be described. The display device 4 according to this embodiment can select the units 29 in one row from among multiple rows using the transistors 98. Instead of selecting all units in the same column and passing current through the light-emitting elements 20, current is supplied only to the units 29 in the row selected by the scanning signal output by the third control unit 53. This makes it possible to reduce the current flowing through the third conductive unit 31, so that even if the unit 29 is located away from the third control unit 53 in the Y direction on the panel 200d, a sufficient voltage can be applied to the light-emitting elements 20 that make up that unit 29.

[0143] In the display device 4 according to this embodiment, as in the first embodiment, the width and thickness of the third conductive portion 31 can be set to sufficiently large values, so that a sufficient voltage can be secured to drive the light-emitting elements 20 constituting the units 29 located further away from the third control unit 53. This makes it possible to provide an image forming region 11 having a longer dimension in the Y direction on the panel 200d, thereby realizing a larger display device 4. Other configurations, operations, and effects of this embodiment are the same as those of the first embodiment.

[0144] Fifth Embodiment This embodiment and its modifications are examples in which the display device 1 according to the first embodiment is used in a transportation vehicle, for example, an automobile. Note that the display device 1 according to the first embodiment may be replaced with a display device according to any of the modifications of the first embodiment or any of the second to fourth embodiments. FIG. 20 is a schematic diagram illustrating the interior of a transportation vehicle according to this embodiment. FIG. 21 is a schematic diagram illustrating an image displayed by the display device according to this embodiment.

[0145] As shown in FIG. 20 , a transportation vehicle 500 according to this embodiment has a cabin 520 in which passengers can board. The transportation vehicle 500 is, for example, an automobile. The transportation vehicle 500 may be a partially autonomously driven automobile. A steering wheel 501 is provided at the driver's seat within the cabin 520 of the transportation vehicle 500. A main display 502 is provided on the passenger seat side of the steering wheel 501. Virtual control buttons 503 are displayed in the air to the sides of the steering wheel 501. A sub-display 504 is provided above the steering wheel 501. A head-up display (HUD) 506 may be displayed further above the sub-display 504, below a windshield 505.

[0146] The display device 1 is used as at least one of the sub-display 504 and the HUD 506. When the display device 1 is used as the sub-display 504, it is placed in a position where it can be directly seen by the user. The user is, for example, the driver of the traffic vehicle 500. When the display device 1 is used as the HUD 506, it is not placed in a position where it can be directly seen by the user, but is placed in a position where light emitted from the display device 1 reaches the user's eyes after being reflected by the lower part of the windshield 505. Alternatively, as the display device, a light-transmitting display device that omits the light adjustment member 61 from the display device 1 of the fourth modified example of the first embodiment is embedded in the lower part of the windshield 505.

[0147] The main display 502 is, for example, a touch panel using a liquid crystal display device. The main display 502 displays, for example, map information provided by a navigation system, location information of the transportation vehicle 500, information about the indoor environment such as air conditioning, and information about auxiliary devices such as audio. Furthermore, when the transportation vehicle 500 is being driven autonomously, the main display 502 may display images unrelated to the transportation vehicle 500, such as an internet browser, an arbitrary work screen, or entertainment content such as a video.

[0148] As shown in Fig. 21 , at least one of the sub-display 504 and the HUD 506 displays an image IM1 using the display device 1. The image IM1 is, for example, information that supports the driving of the traffic vehicle 500. The image IM1 has, for example, a high-definition area Ra, a medium-definition area Rb, and a low-definition area Rc set therein. The high-definition area Ra is displayed by the panel 200a of the display device 1. The medium-definition area Rb is displayed by the panel 200b. The low-definition area Rc is displayed by the panel 200c.

[0149] The high-resolution area Ra displays, for example, text information or a portion of a map. In the example shown in FIG. 25, information about the next intersection is displayed. The medium-resolution area Rb displays, for example, numbers. In the example shown in FIG. 25, the current speed and legal speed limit of the traffic vehicle 500 are displayed. The low-resolution area Rc displays, for example, icons and symbols. In the example shown in FIG. 25, the remaining battery level, whether or not there is an incoming email, and whether or not there is an incoming phone call are displayed.

[0150] The image IM1 may have a white background and letters, numbers, symbols, etc. displayed in black or color. However, to reduce power consumption, it is preferable to display the background in black and the letters, numbers, symbols, etc. in white or color. When displaying in color, a full-color display using all of red, green, and blue may be used, or only some of the colors may be used. For example, in the high-definition region Ra and the medium-definition region Rb, a full-color display using all of red, green, and blue may be used, and in the low-definition region Rc, only blue and green light-emitting elements may be provided, and an image may be displayed using only green and blue without the red light-emitting element. In this way, by configuring each panel 200 according to the image IM1, the cost of the display device 1 can be reduced.

[0151] According to this embodiment, power consumption can be reduced because the display device 1 is used as the sub-display 504 or the HUD 506. Furthermore, because the sub-display 504 or the HUD 506 is disposed above the steering wheel 501, the amount of change in the focal length of the eyes can be reduced when the user alternates between looking at the view ahead of the traffic vehicle 500 and the sub-display 504 or the HUD 506. This reduces the burden on the user.

[0152] If the sub-display 504 or the HUD 506 is disposed above the steering wheel 501, sunlight that has passed through the windshield 505 may be irradiated onto the display device 1, potentially causing the display device 1 to become hot. In this embodiment, LEDs are used as the light-emitting elements of the display device 1, which has higher heat resistance than display devices that use liquid crystal. Therefore, even if the sub-display 504 or the HUD 506 is disposed above the steering wheel 501, failure due to sunlight is unlikely to occur. Other configurations, operations, and effects of this embodiment are the same as those of the first embodiment.

[0153] <First Modification of the Fifth Embodiment> Fig. 22 is a diagram showing the rear of a traffic vehicle according to this modification. As shown in Fig. 22, a traffic vehicle 500a according to this modification uses a display device 1 for the lower part of a rear shield 507 and for brake lamps 508. An image IM2 including a message for following vehicles, such as a beginner's mark and the text "Kid's in Car," is displayed on the rear shield 507. The brake lamps 508 display a gauge indicating the amount of brake depression. These displays can be viewed by an outsider outside the vehicle compartment 520.

[0154] According to this modification, the beginner mark is displayed only when the driver is a beginner, and the "Kid's in Car" character string is displayed only when there is a child in the vehicle compartment 520. This makes the display easier than attaching and detaching a sticker. Note that the content of the image IM2 displayed on the rear shield 507 is not limited to the above example. For example, when the transportation vehicle 500a is being driven autonomously, an advertisement may be displayed on the entire surface of the rear shield 507.

[0155] Furthermore, according to this modification, by using a gauge display for the brake lamp 508, the driver of the following vehicle can be informed of the amount of brake application. This allows the driver of the following vehicle to determine the degree of deceleration of the traffic moving object 500a, thereby improving safety. The configuration, operation, and effects of this modification other than those described above are the same as those of the sixth embodiment.

[0156] <Second Modification of Sixth Embodiment> Fig. 23 is a diagram showing the front of a traffic vehicle according to this modification, and Fig. 24 is a cross-sectional view showing the windshield of the traffic vehicle according to this modification.

[0157] As shown in Fig. 23, when the traffic vehicle 500b according to this modification is operating autonomously, an image IM3 indicating that the traffic vehicle 500b is operating autonomously is displayed on the windshield 505. For example, the word "Auto" is displayed with turquoise blue as the text or background color. This alerts people in the vicinity outside the cabin 520 of the traffic vehicle 500b.

[0158] 24 , in the windshield 505 of the transportation vehicle 500b, an exterior display device 1g is provided on the outer side of a substrate 510, and an interior display device 1h is provided on the passenger compartment 520 side of the substrate 510. The substrate 510 is a plate material that can be switched between a transparent state and an opaque state, and is formed of, for example, an electrochromic material. It is preferable to use a light-transmitting display device as described in the fourth modification of the first embodiment for the display devices 1g and 1h.

[0159] As a result, when the transportation vehicle 500b is manually driven, the base material 510 is made transparent and the display devices 1g and 1h are turned off. Alternatively, the image IM1 shown in FIG. 21 may be displayed at the bottom of the in-vehicle display device 1h.

[0160] On the other hand, when the transportation vehicle 500b is operated automatically, the base material 510 is made opaque, and the exterior display device 1g displays the image IM3. When there are passengers inside the transportation vehicle 500b, the interior display device 1h may display an image desired by the passengers, such as an internet browser, a work screen, or entertainment content such as a video.

[0161] According to this modification, various images can be individually displayed to people around the traffic vehicle 500b and passengers inside the vehicle by providing display devices inside and outside the windshield 505. The configuration, operation, and effects of this modification other than those described above are the same as those of the fifth embodiment.

[0162] The above-described embodiments and their modifications are examples of realizing the present invention, and the present invention is not limited to these embodiments and modifications. For example, the present invention also includes the addition, deletion, or modification of some components or steps in the above-described embodiments and modifications. Furthermore, the above-described embodiments and modifications can be implemented in combination with each other.

[0163] The embodiments include the following aspects.

[0164] a light-absorbing light-adjusting member having a plurality of openings arranged on the first surface along a first direction; a plurality of first light-emitting elements each having a plurality of light extraction surfaces, a plurality of electrode-forming surfaces respectively located on opposite sides of the plurality of light extraction surfaces, a plurality of first electrodes respectively arranged on the plurality of electrode-forming surfaces, and a plurality of second electrodes respectively arranged on the plurality of electrode-forming surfaces apart from the plurality of first electrodes; a plurality of first conductive parts arranged on the light-adjusting member and electrically connected to the plurality of first electrodes; a plurality of second conductive parts arranged on the light-adjusting member and electrically connected to the plurality of second electrodes; a covering member covering the light-adjusting member, the plurality of first light-emitting elements, the plurality of first conductive parts, and the second conductive parts; a third conductive part extending on the covering member along the first direction and electrically connected to the plurality of first conductive parts; and the plurality of fourth conductive parts extending on the covering member along the first direction and electrically connected to the plurality of second conductive parts, The display device wherein the plurality of first light-emitting elements are disposed in the plurality of openings, respectively.

[0165] (Appendix 2) A display device as described in Appendix 1, further comprising a light-reflecting member covering one of the plurality of electrode forming surfaces and a side surface connecting the one electrode forming surface and a light extraction surface located on the opposite side of the one electrode forming surface.

[0166] (Supplementary Note 3) The display device according to Supplementary Note 1 or 2, wherein the third conductive portion overlaps with the plurality of first light-emitting elements in a plan view.

[0167] (Supplementary Note 4) The display device according to any one of Supplementary Notes 1 to 3, further comprising a bonding member disposed between each of the plurality of light extraction surfaces and the first surface.

[0168] (Supplementary Note 5) The display device according to Supplementary Note 4, further comprising a wavelength conversion member disposed between the bonding member and the first surface.

[0169] (Appendix 6) The display device according to any one of Appendices 1 to 5, wherein, in a cross-sectional view, the thickness of the third conductive portion and the thickness of the fourth conductive portion are thicker than the thickness of the first conductive portion and the thickness of the second conductive portion.

[0170] (Supplementary Note 7) The display device according to any one of Supplementary Notes 1 to 6, wherein the minimum length of the third conductive portion in a second direction perpendicular to the first direction is longer than the minimum length of each of the plurality of fourth conductive portions in the second direction.

[0171] (Appendix 8) The display device according to any one of Appendices 1 to 7, wherein the plurality of first conductive portions, the plurality of second conductive portions, the third conductive portion, the plurality of fourth conductive portions, and the covering member are translucent.

[0172] (Supplementary Note 9) The display device according to any one of Supplementary Notes 1 to 8, wherein, in a cross-sectional view, the thickness of the light adjustment member is thinner than the thickness of each of the plurality of first light-emitting elements.

[0173] (Supplementary Note 10) The display device according to any one of Supplementary Notes 1 to 9, wherein the thickness of the light adjustment member is 0.5 μm or more and 15 μm or less in a cross-sectional view.

[0174] (Supplementary Note 11) The display device according to Supplementary Note 10, wherein the light adjusting member includes a metal material, and a thickness of the light adjusting member in a cross-sectional view is 0.5 μm or more and 10 μm or less.

[0175] (Supplementary Note 12) The display device according to Supplementary Note 10, wherein the light adjusting member includes a resin material, and a thickness of the light adjusting member in a cross-sectional view is 1 μm or more and 15 μm or less.

[0176] (Supplementary Note 13) The display device according to any one of Supplementary Notes 1 to 12, wherein the plurality of first conductive portions respectively cover at least a portion of a plurality of side surfaces connecting the plurality of electrode formation surfaces and the plurality of light extraction surfaces.

[0177] (Supplementary Note 14) The display device according to any one of Supplementary Notes 1 to 13, wherein the support member is flexible.

[0178] (Supplementary Note 15) The display device according to any one of Supplementary Notes 1 to 14, wherein each of the plurality of light extraction surfaces includes a plurality of inclined surfaces, and the angles of the plurality of inclined surfaces are interior angles with respect to the first surface, and are not less than 1° and not more than 90°.

[0179] (Appendix 16) The display device described in any one of Appendices 1 to 15, further comprising: a plurality of second light-emitting elements arranged adjacent to each of the plurality of first light-emitting elements in the first direction on the first surface; and a plurality of third light-emitting elements arranged adjacent to each of the plurality of second light-emitting elements in the first direction on the first surface.

[0180] (Appendix 17) A display device as described in Appendix 16, in which one first light-emitting element among the plurality of first light-emitting elements, one second light-emitting element among the plurality of second light-emitting elements that is adjacent to the one first light-emitting element, and one third light-emitting element among the plurality of third light-emitting elements that is adjacent to the one second light-emitting element are arranged in one opening among the plurality of openings.

[0181] (Appendix 18) A display device as described in Appendix 16, wherein one first light-emitting element among the plurality of first light-emitting elements is arranged in a first opening among the plurality of openings; one second light-emitting element among the plurality of second light-emitting elements, which is adjacent to the one first light-emitting element, is arranged in a second opening among the plurality of openings; and one third light-emitting element among the plurality of third light-emitting elements, which is adjacent to the one second light-emitting element, is arranged in a third opening among the plurality of openings.

[0182] (Appendix 19) The display device described in any one of Appendices 16 to 18, further comprising: a plurality of fourth light-emitting elements arranged on the first surface adjacent to each of the plurality of first light-emitting elements in a second direction perpendicular to the first direction; a plurality of fifth light-emitting elements arranged on the first surface adjacent to each of the plurality of second light-emitting elements in the second direction; and a plurality of sixth light-emitting elements arranged on the first surface adjacent to each of the plurality of third light-emitting elements in the second direction, wherein the plurality of fourth light-emitting elements each have a peak wavelength that is the same as the peak wavelength of the plurality of first light-emitting elements, the plurality of fifth light-emitting elements each have a peak wavelength that is the same as the peak wavelength of the plurality of second light-emitting elements, and the plurality of sixth light-emitting elements have a peak wavelength that is the same as the peak wavelength of the plurality of third light-emitting elements.

[0183] (Supplementary Note 20) A vehicle comprising: a vehicle cabin in which a passenger sits; and a display device according to any one of Supplementary Notes 1 to 19, which is arranged in the vehicle cabin, wherein the display device is visually recognized by the passengers in the vehicle cabin.

[0184] (Supplementary Note 21) A vehicle comprising: a vehicle cabin in which a passenger sits; and a display device according to any one of Supplements 1 to 19 installed in the vehicle cabin, wherein the display device is visible to an outsider outside the vehicle cabin.

[0185] DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c, 1d, 1f, 1g, 1h, 2, 3, 4...display device, 10...support member, 10a...first surface, 10b...second surface, 11...image forming area, 12...wiring connection area, 13...element area, 14...wiring area, 15...controller mounting area, 20...light emitting element, 21...first light emitting element, 21a...light extraction surface, 21b...electrode forming surface, 21c...side surface, 21d...semiconductor portion, 21d1...n-type semiconductor layer, 21d2...p-type semiconductor layer, 21d3...active layer, 21e...first electrode, 21f...second electrode, 21g... Current spreading layer, 21h...first reflective layer, 21j...second reflective layer, 21k...insulating layer, 21m...first protective film, 21n...second protective film, 22...second light emitting element, 23...third light emitting element, 29...unit, 31, 31a, 31f...third conductive portion, 31b...seed metal layer, 31c...via, 32, 32a, 32b, 32c...fourth conductive portion, 33, 33e, 33f...first conductive portion, 34...second conductive portion, 35, 35a...fifth conductive portion, 35b...seed metal layer, 36a, 36b...sixth conductive portion, 37...seventh conductive portion, 51 ...first control unit, 51c...conversion unit, 51d...storage unit, 51e...current output unit, 61...light adjustment member, 61a, 61e...opening, 71...covering member, 71V...through hole, 72...anisotropic connecting member, 73...connecting member, 74...protective member, 92...light reflecting member, 94...bonding member, 96...wavelength conversion member, 100...mounting substrate, 200, 200a, 200b, 200c...panel, 300...flexible wiring, 301...insulating base, 302...wiring, 400...external memory, 500, 500a, 500b...traffic moving body, 501...Steering wheel, 502...Main display, 503...Control button, 504...Sub-display, 505...Front shield, 507...Rear shield, 508...Brake lamp, 510...Substrate, 520...Vehicle interior, 1000a to 1000l...Intermediate member, 1001...Mask, 1010...Support member, 1030...Seed metal layer, 1094...Joint layer, D1...Image data, D2...Image data, IM1, IM2, IM3...Image, Ra...High resolution region, Rb...Medium resolution region, Rc...Low resolution region

Claims

a light-absorbing light-adjusting member having a plurality of openings arranged on the first surface along a first direction; a plurality of first light-emitting elements each having a plurality of light extraction surfaces, a plurality of electrode-forming surfaces respectively located on the opposite sides of the plurality of light extraction surfaces, a plurality of first electrodes respectively arranged on the plurality of electrode-forming surfaces, and a plurality of second electrodes respectively arranged on the plurality of electrode-forming surfaces away from the plurality of first electrodes; a plurality of first conductive parts arranged on the light-adjusting member and electrically connected to the plurality of first electrodes; a plurality of second conductive parts arranged on the light-adjusting member and electrically connected to the plurality of second electrodes; a covering member covering the light-adjusting member, the plurality of first light-emitting elements, the plurality of first conductive parts, and the second conductive parts; a third conductive part extending on the covering member along the first direction and electrically connected to the plurality of first conductive parts; and a plurality of fourth conductive parts extending on the covering member along the first direction and electrically connected to the plurality of second conductive parts, The display device wherein the plurality of first light-emitting elements are disposed in the plurality of openings, respectively.

2. A display device according to claim 1, further comprising a light-reflecting member covering one of the plurality of electrode formation surfaces and a side surface connecting the one electrode formation surface and a light extraction surface located on the opposite side of the one electrode formation surface.

3. The display device according to claim 1 or 2, wherein the third conductive portion overlaps the plurality of first light-emitting elements in a plan view.

4. The display device according to any one of claims 1 to 3, further comprising a bonding member disposed between each of the plurality of light extraction surfaces and the first surface.

5. The display device according to claim 4, further comprising a wavelength conversion member disposed between the joining member and the first surface.

6. A display device according to any one of claims 1 to 5, wherein, in a cross-sectional view, the thickness of the third conductive portion and the thickness of the fourth conductive portion are greater than the thickness of the first conductive portion and the thickness of the second conductive portion.

7. A display device according to any one of claims 1 to 6, wherein the minimum length of the third conductive portion in a second direction perpendicular to the first direction is longer than the minimum length of each of the plurality of fourth conductive portions in the second direction.

8. A display device according to any one of claims 1 to 7, wherein the plurality of first conductive parts, the plurality of second conductive parts, the third conductive part, the plurality of fourth conductive parts and the covering member are translucent.

9. The display device according to any one of claims 1 to 8, wherein the thickness of said light adjusting member is thinner than the thickness of each of said plurality of first light emitting elements in a cross-sectional view.

10. The display device according to any one of claims 1 to 9, wherein the thickness of the light adjusting member in cross section is 0.5 μm or more and 15 μm or less.

11. The display device according to claim 10, wherein the light adjusting member includes a metal material, and the thickness of the light adjusting member in a cross-sectional view is 0.5 μm or more and 10 μm or less.

12. The display device according to claim 10, wherein the light adjusting member contains a resin material, and the thickness of the light adjusting member in a cross-sectional view is 1 μm or more and 15 μm or less.

13. The display device according to any one of claims 1 to 12, wherein the plurality of first conductive portions respectively cover at least a portion of a plurality of side surfaces connecting the plurality of electrode formation surfaces and the plurality of light extraction surfaces.

14. The display device according to any one of claims 1 to 13, wherein the support member is flexible.

15. A display device according to any one of claims 1 to 14, wherein each of the plurality of light extraction surfaces includes a plurality of inclined surfaces, and the angles of the plurality of inclined surfaces are interior angles with respect to the first surface, and are equal to or greater than 1° and equal to or less than 90°.

16. A display device according to any one of claims 1 to 15, further comprising: a plurality of second light-emitting elements arranged adjacent to each of the plurality of first light-emitting elements in the first direction on the first surface; and a plurality of third light-emitting elements arranged adjacent to each of the plurality of second light-emitting elements in the first direction on the first surface.

17. A display device as described in claim 16, wherein one first light-emitting element of the plurality of first light-emitting elements, one second light-emitting element of the plurality of second light-emitting elements that is adjacent to the one first light-emitting element, and one third light-emitting element of the plurality of third light-emitting elements that is adjacent to the one second light-emitting element are arranged in one opening of the plurality of openings.

18. A display device as described in claim 16, wherein one first light-emitting element of the plurality of first light-emitting elements is arranged in a first opening of the plurality of openings, one second light-emitting element of the plurality of second light-emitting elements adjacent to the one first light-emitting element is arranged in a second opening of the plurality of openings, and one third light-emitting element of the plurality of third light-emitting elements adjacent to the one second light-emitting element is arranged in a third opening of the plurality of openings.

19. A display device as described in any one of claims 16 to 18, further comprising: a plurality of fourth light-emitting elements arranged on the first surface adjacent to each of the plurality of first light-emitting elements in a second direction perpendicular to the first direction; a plurality of fifth light-emitting elements arranged on the first surface adjacent to each of the plurality of second light-emitting elements in the second direction; and a plurality of sixth light-emitting elements arranged on the first surface adjacent to each of the plurality of third light-emitting elements in the second direction, wherein the plurality of fourth light-emitting elements each have a peak wavelength within the range of the peak wavelengths of the plurality of first light-emitting elements, the plurality of fifth light-emitting elements each have a peak wavelength within the range of the peak wavelengths of the plurality of second light-emitting elements, and the plurality of sixth light-emitting elements have a peak wavelength within the range of the peak wavelengths of the plurality of third light-emitting elements.

20. A vehicle comprising: a vehicle cabin in which a passenger can ride; and a display device according to any one of claims 1 to 19, which is disposed in the vehicle cabin, wherein the display device is visible to the passengers in the vehicle cabin.

21. A vehicle comprising: a passenger compartment capable of carrying a passenger; and a display device according to any one of claims 1 to 19, wherein the display device is visible to an outsider outside the passenger compartment.

Images