Display device and method for manufacturing display device

Abstract

This display device comprises: a plurality of pixel elements that are configured from a plurality of light emitting elements; and a control unit that controls the passage of a current through each of the plurality of light emitting elements. Each of the plurality of pixel elements includes a green light emitting element and a red light emitting element. The green light emitting element outputs green light having a peak wavelength in the range of 500-560 nm. The red light emitting element outputs red light having a peak wavelength in the range of 600-780 nm. When passing a first green main current through the green light emitting element included in a first pixel element that is one of the plurality of pixel elements, the control unit passes a first green auxiliary current smaller than the first green main current through the red light emitting element included in the first pixel element in order to output green light having desired chromaticity from the first pixel element.

Description

Display device and method for manufacturing the same

[0001] The embodiments relate to a display device and a method for manufacturing a display device.

[0002] Vehicles such as automobiles are equipped with display devices that display information such as speed to the driver. In recent years, such display devices have been gradually replacing physical meters with digital meters. Typically, digital meters use liquid crystal panels. However, liquid crystal panels have the problem of consuming a lot of power.

[0003] Japanese Patent Application Laid-Open No. 2003-248461

[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 display device according to an embodiment includes a plurality of pixel elements each composed of a plurality of light-emitting elements, and a control unit that controls energization of each of the plurality of light-emitting elements. Each of the plurality of pixel elements includes a green light-emitting element and a red light-emitting element. The green light-emitting element outputs green light having a peak wavelength in the range of 500 nm to 560 nm. The red light-emitting element outputs red light having a peak wavelength in the range of 600 nm to 780 nm. When the control unit passes a first green main current through the green light-emitting element included in a first pixel element, which is one of the plurality of pixel elements, the control unit passes a first green secondary current, which is smaller than the first green main current, through the red light-emitting element included in the first pixel element, in order to output green light of a desired chromaticity from the first pixel element.

[0006] According to the embodiment, a display device capable of reducing power consumption can be realized.

[0007] FIG. 1 is a plan view showing a display device according to a first embodiment. FIG. 2 is a plan view showing one panel in the display device according to the first embodiment. FIG. 3 is a cross-sectional view showing the display device according to the first embodiment. FIG. 4 is a cross-sectional view showing one blue light-emitting element in the display device according to the first embodiment. FIG. 5 is a plan view showing one pixel element and its periphery in the display device according to the first embodiment. FIG. 6 is a circuit diagram showing the display device according to the first embodiment. FIG. 7 is a plan view showing a first light adjustment member in the display device according to the first embodiment. FIG. 8 is a block diagram showing a first control unit in the display device according to the first embodiment. FIG. 9 is a diagram showing coordinates of pixel elements in each panel. FIG. 10 is a diagram showing a green correction database stored in a storage unit. FIG. 11 is a diagram showing a red correction database stored in a storage unit. FIG. 12 is a diagram showing correction of green light and red light output from pixel elements on a chromaticity diagram. FIG. 13 is a flow chart showing an example of a method for manufacturing a display device. FIG. 14 is a flow chart showing an example of a method for manufacturing a display device according to a first modified example. FIG. 15 is a diagram showing changes in chromaticity in the first modified example. FIG. 16 is a diagram showing chromaticity correction for each pixel in the first modified example. FIG. 17 is a diagram showing a green correction database 51d3 in the second modified example. FIG. 18 is a diagram showing a red correction database 51d4 in the second modified example. FIG. 19 is a flowchart showing the first half of a method for manufacturing the display device 1 in the second modified example. FIG. 20 is a flowchart showing the second half of a method for manufacturing the display device 1 in the second modified example. FIG. 21 is a flowchart showing an example of a method for manufacturing the display device 1 in the third modified example. FIG. 22 is a cross-sectional view showing a display device according to a third modified example of the first embodiment. FIG. 23 is a partially enlarged plan view showing a display device according to a fourth modified example of the first embodiment. FIG. 24 is a cross-sectional view taken along line XXIV-XXIV shown in FIG. 23. FIG. 25 is a cross-sectional view showing a display device according to the second embodiment. FIG. 26 is a plan view showing a display device according to the third embodiment. FIG. 27 is a diagram showing the operation of the display device according to the third embodiment. FIG. 28 is a plan view showing a display device according to the fourth embodiment. FIG. 29 is a diagram showing the interior of a transportation vehicle according to the fifth embodiment.Fig. 30 is a diagram showing an image displayed by a display device according to the fifth embodiment. Fig. 31 is a diagram showing the rear surface of a traffic vehicle according to a first modified example of the fifth embodiment. Fig. 32 is a diagram showing the front surface of a traffic vehicle according to a second modified example of the fifth embodiment. Fig. 33 is a cross-sectional view showing the windshield of a traffic vehicle according to the second modified example of the fifth embodiment.

[0008] <First Embodiment> Fig. 1 is a plan view showing a display device according to this embodiment. Fig. 2 is a plan view showing one panel in the display device according to this embodiment. Fig. 3 is a cross-sectional view showing the display device according to this embodiment. Fig. 4 is a cross-sectional view showing one blue light-emitting element in the display device according to this embodiment. Fig. 5 is a plan view showing one pixel element and its periphery in the display device according to this embodiment. Fig. 6 is a circuit diagram showing the display device according to this embodiment. Fig. 7 is a plan view showing a first light adjustment member in the display device according to this embodiment. Fig. 8 is a block diagram showing a first control unit in the display device according to this embodiment.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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 "first direction X," the direction parallel to the surface of the mounting substrate 100 and perpendicular to the first direction X will be referred to as the "second direction Y," and the direction perpendicular to the first direction X and the second direction Y will be referred to as the "third direction Z."

[0013] Regarding the first direction X, a distinction is made between a "+X direction" and a "-X direction" as necessary. The same applies to the second direction Y and the third direction Z. Of the third direction Z, 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.

[0014] 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.

[0015] 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.

[0016] 2 and 3 , the panel 200a includes a first support member 10, a plurality of blue light-emitting elements 21, a plurality of green light-emitting elements 22, a plurality of red light-emitting elements 23, a plurality of first conductive portions 31, a plurality of second conductive portions 32, a plurality of third conductive portions 33, a plurality of fourth conductive portions 34, a plurality of fifth conductive portions 35, a control unit 51, one first 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.

[0017] The shape of the first support member 10 is, for example, a rectangular plate with the second direction Y as the longitudinal direction, the first direction X as the lateral direction, and the third direction Z as the thickness direction. Note that the term "rectangle" here refers not only to a quadrangle with right-angled corners, but also to a shape with chamfered corners. A shape with chamfered corners includes a shape in which two orthogonal sides are connected via a curve, or a shape in which two orthogonal sides are connected via an oblique straight line. The first support member 10 is translucent. The first support member 10 is made of, for example, glass. The first support member 10 may be a flexible substrate that is both translucent and flexible.

[0018] An image forming area 11 is set on the upper surface of the first support member 10, i.e., on the area on the +Y direction side of the surface on the +Z direction side. A wiring connection area 12 is set on the end of the upper surface of the first support member 10 on the -Y direction side. The control unit 51 is disposed between the image forming area 11 and the wiring connection area 12 on the first support member 10, and is spaced apart from the image forming area 11 and the wiring connection area 12 in the second direction Y.

[0019] In the image forming region 11, a plurality of element regions 13 and a plurality of wiring regions 14 are alternately arranged along the first direction X. 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 first direction X. 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.

[0020] In each element region 13, blue light-emitting elements 21, green light-emitting elements 22, and red light-emitting elements 23 are repeatedly arranged in a row along the second direction Y. The blue light-emitting elements 21 are, for example, LEDs (light-emitting diodes) whose peak wavelength of emitted light is in the range of 430 nm to 480 nm. The green light-emitting elements 22 are, for example, LEDs whose peak wavelength of emitted light is in the range of 500 nm to 560 nm. The red light-emitting elements 23 are, for example, LEDs whose peak wavelength of emitted light is in the range of 600 nm to 780 nm.

[0021] In the entire image forming region 11, across the plurality of element regions 13, a plurality of blue light-emitting elements 21 are arranged on the first support member 10 along the first direction X, a plurality of green light-emitting elements 22 are arranged on the first support member 10 along the first direction X, and a plurality of red light-emitting elements 23 are arranged on the first support member 10 along the first direction X. Furthermore, the plurality of green light-emitting elements 22 are arranged spaced apart from the plurality of blue light-emitting elements 21 in the second direction Y, and the plurality of red light-emitting elements 23 are arranged spaced apart from the plurality of green light-emitting elements 22 in the second direction Y.

[0022] As shown in FIG. 4 , each of the multiple blue light-emitting elements 21 has one light-extraction surface 21a, one electrode-forming surface 21b, and multiple side surfaces 21c. The "light-extraction surface" refers to the main surface from which light emitted from the light-emitting element is emitted, but not all light needs to be emitted from the light-extraction surface. For example, a small amount of light may also be emitted from the side surfaces 21c. The light-extraction surface 21a faces the first support member 10. The electrode-forming 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-forming surface 21b. In one example, the light-extraction surface 21a is square, and the electrode-forming surface 21b is square and smaller than the light-extraction surface 21a. There are four side surfaces 21c, and each side surface 21c is trapezoidal. Note that the shapes of the light-extraction surface 21a, the electrode-forming surface 21b, and the side surfaces 21c may be rectangular.

[0023] Each blue 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 semiconductor layer, an active layer, and an n-type semiconductor 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 connected to the p-type semiconductor layer of the semiconductor portion 21d, and the second electrode 21f is connected to the n-type semiconductor layer of the semiconductor portion 21d. The blue 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 green light-emitting element 22 and the red light-emitting element 23 have similar configurations.

[0024] The structure of the semiconductor portion 21d may be a structure having a single active layer such as a double heterostructure or a single quantum well structure (SQW), or a structure having a group of active layers such as a multiple quantum well structure (MQW). The semiconductor portion 21d can emit visible light or ultraviolet light. The semiconductor portion 21d can emit visible light ranging from blue to red. Examples of semiconductor laminates including such a light emitting layer include In ｘ Al ｙ Ga １－ｘ－ｙN (0≦x, 0≦y, x+y≦1). The semiconductor portion 21d can include at least one light-emitting layer (active layer) capable of emitting light. For example, the semiconductor portion 21d may have a structure including one or more light-emitting layers between an n-type semiconductor layer and a p-type semiconductor layer, or may have a structure in which a structure including an n-type semiconductor layer, a light-emitting layer, and a p-type semiconductor layer in that order is repeated multiple times. When the semiconductor stack includes multiple light-emitting layers, the light-emitting layers may have different peak wavelengths or may have light-emitting layers with the same peak wavelength. Note that the same peak wavelength may have a variation of, for example, several nanometers. The combination of such light-emitting layers can be appropriately selected. For example, when the semiconductor stack includes two light-emitting layers, the light-emitting layers can be selected from combinations such as blue light and blue light, green light and green light, red light and red light, ultraviolet light and ultraviolet light, blue light and green light, blue light and red light, or green light and red light. Furthermore, the light-emitting layer may include multiple active layers with different peak wavelengths or multiple active layers with the same peak wavelength.

[0025] As shown in FIGS. 2 and 5 , one first conductive portion 31 is disposed in each element region 13. The first conductive portion 31 is a wiring extending in the second direction Y and includes, for example, copper (Cu). The first conductive portion 31 may be formed of a conductive and translucent material such as ITO (Indium-Tin-Oxide). The first conductive portion 31 is positioned on the +Z direction side of the blue light-emitting element 21, the green light-emitting element 22, and the red 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 first conductive portion 31 is electrically connected to the first electrode 21 e of the blue light-emitting element 21 that overlaps it in a planar view via the third conductive portion 33. Similarly, the first conductive portion 31 is electrically connected to the first electrode of the green light-emitting element 22 that overlaps it in a planar view, and the first electrode of the red light-emitting element 23 that overlaps it in a planar view. For example, one first 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 panel 200a, the plurality of third conductive portions 33 extend in the first direction X and connect the plurality of first electrodes 21e to the plurality of first conductive portions 31. In other words, in a plan view, one of the plurality of blue light emitting elements 21 is disposed on top of one of the plurality of first conductive portions 31, and this one blue light emitting element 21 is electrically connected to this one first conductive portion 31.

[0028] A plurality of second conductive portions 32 are arranged in each wiring region 14. The plurality of second conductive portions 32 extend in the second direction Y on the first support member 10 and are electrically connected to the second electrodes 21f of the plurality of light-emitting elements 20 via fourth conductive portions 34. In the panel 200a, the plurality of fourth conductive portions 34 extend in the first direction X and connect the plurality of second electrodes 21f to the plurality of second conductive portions 32, respectively. The second conductive portions 32 include, for example, copper. The second conductive portions 32 may be formed of a material having conductivity and translucency, such as ITO. The third conductive portion 33 and the fourth conductive portion 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 a single first conductive portion 31, and the second electrodes are individually connected to mutually different second conductive portions 32. Furthermore, the second electrodes of the light-emitting elements 20 arranged in mutually different element regions 13 and at the same position in the second direction Y are connected to the common second conductive portion 32 via a common fourth conductive portion 34. The first conductive portion 31 and the second conductive portion 32 are electrically connected to the 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 third conductive portion 33 and the fourth 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 third conductive portion 33 and the fourth conductive portion 34, thereby improving the light extraction efficiency.

[0031] As shown in FIGS. 3 and 7 , the first light adjustment members 61 are positioned on the upper surface of the first support member 10 around each of the plurality of blue light-emitting elements 21. The first light adjustment members 61 are made of a light-absorbing resin material or metal material. For example, the first light adjustment members 61 can be made of an insulating resin material such as acrylic, polyimide, or siloxane. These resins can be made light-absorbing by including black pigments such as carbon black or graphite. Having light absorption means that the reflectance of the first light adjustment members 61 is 0% or more and 50% or less, more preferably 0% or more and 40% or less, at the emission peak wavelength of the light-emitting elements.

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

[0033] The covering member 71 is disposed on the first support member 10 and covers the light-emitting element 20, the third conductive portion 33, and the fourth conductive portion 34. 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 first 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. The covering member 71 has a first surface 71a disposed opposite the first support member 10 and a second surface 71b located on the opposite side of the first surface 71a.

[0034] The third conductive portion 33 and the fourth conductive portion 34 are disposed on the first surface 71a side (lower side) of the covering member 71 and extend in the first direction X. The first conductive portion 31 and the second conductive portion 32 are disposed on the second surface 71b side (upper side) of the covering member 71 and extend in the second direction Y. As shown in Fig. 5 , in a plan view, in a portion where the fourth conductive portion 34 and the second conductive portion 32 overlap, the minimum length 34L of the fourth conductive portion 34 in the second direction Y is shorter than the minimum length 32L of the second conductive portion 32 in the first direction X. In other words, 34L < 32L.

[0035] 3 , in the panel 200, a first support member 10, a covering member 71, and a protective member 74 are layered in this order from the −Z direction side to the +Z direction side. The light emitting element 20, the third conductive portion 33, the fourth conductive portion 34, and the first light adjustment member 61 are disposed between the first support member 10 and the covering member 71. The first conductive portion 31, the second conductive portion 32, the anisotropic connection member 72, and the control unit 51 are disposed between the covering member 71 and the protective member 74.

[0036] The control unit 51 is electrically connected to at least one blue light-emitting element 21 among the plurality of blue light-emitting elements 21 via at least one first conductive element 31 among the plurality of first conductive elements 31 and at least one second conductive element 32 among the plurality of second conductive elements 32. For example, the control unit 51 is electrically connected to all the blue light-emitting elements 21, all the green light-emitting elements 22, and all the red light-emitting elements 23. The control unit 51 is, for example, an IC (integrated circuit) chip. Note that the control unit 51 may be composed of multiple chips.

[0037] The control unit 51 is electrically connected to the plurality of first conductive portions 31 and the plurality of second conductive portions 32 via an anisotropic connecting member 72. The anisotropic connecting member 72 contains a conductive material. For example, the control unit 51 and the first conductive portion 31 are electrically connected via the conductive material by sandwiching the conductive material between them and making contact with both. The anisotropic connecting member 72 may include, for example, an anisotropic conductive paste or an anisotropic conductive film. Use of the anisotropic connecting member 72 makes it easier to reduce the thickness compared to when an isotropic connecting member such as solder is used for joining, and reduces the risk of short-circuiting even when the first conductive portion 31 and the second conductive portion 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 control unit 51 and the fifth conductive portion 35.

[0038] The 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 first direction X.

[0039] The protective member 74 is disposed on the covering member 71, and covers the first conductive portion 31, the second conductive portion 32, the third conductive portion 33, the fourth conductive portion 34, the anisotropic connecting member 72, and the control unit 51. The protective member 74 does not cover the connecting member 73 or the flexible wiring 300.

[0040] In the panel 200a, pixel elements 29 are mounted so as to be periodically arranged along the first direction X and the second direction Y. As described above, each pixel element 29 is composed of one blue light-emitting element 21, one green light-emitting element 22, and one red light-emitting element 23 arranged adjacent to each other in the second direction Y. Note that each pixel element 29 may be composed of one or two of the blue light-emitting element 21, the green light-emitting element 22, and the red light-emitting element 23, or may be composed of four or more light-emitting elements 20. The pixel element 29 may include two or more of any of the blue light-emitting element 21, the green light-emitting element 22, and the red light-emitting element 23.

[0041] In panel 200b, pixel elements 29 are arranged at a lower density than in panel 200a. For example, the arrangement density of pixel elements 29 in panel 200b is ½ times the arrangement density of pixel elements 29 in panel 200a. In panel 200c, pixel elements 29 are arranged at a lower density than in panel 200b. For example, the arrangement density of pixel elements 29 in panel 200c is ½ times the arrangement density of pixel elements 29 in panel 200b. In other words, the arrangement density of pixel elements 29 in panel 200c is ¼ times the arrangement density of pixel elements 29 in panel 200a.

[0042] 1 , the panel 200b has a second support member 15, a pixel element 29 including a plurality of fourth light-emitting elements 24, and a control unit 51. That is, the display device 1 further includes a light-transmitting second support member 15 arranged adjacent to the first support member 10 in the first direction X, a pixel element 29 including a plurality of fourth light-emitting elements 24 arranged on the second support member 15 in the first direction X, and a control unit 51 arranged away from the plurality of fourth light-emitting elements 24 in the second direction Y and electrically connected to at least a portion of the plurality of fourth light-emitting elements 24.

[0043] The second support member 15 and the fourth light-emitting element 24 have the same configurations as the first support member 10 and the blue light-emitting element 21, respectively. Note that "same configuration" means manufactured based on the same design, and unavoidable manufacturing process errors and variations in material composition are included within the scope of "same." Components with the same configuration have the same target performance; for example, the peak wavelength of emitted light from light-emitting elements with the same configuration is in the same range. Specifically, for example, each control unit 51 possessed by a different panel 200 may have the same physical structure, such as the shape, arrangement, and connection relationship of the elements and wiring included in the control unit 51, as other control units 51, but the stored data may be different. Like panel 200a, panel 200c has a first support member 10, multiple light-emitting elements 20, a control unit 51, and the like.

[0044] 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 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.

[0045] 8 shows the control unit 51 of the primary panel and the control unit 51 of one secondary panel arranged next to the primary panel. As shown in FIG. 8, the 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 of the primary panel from outside the display device 1 via 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 stores the image data D2 of all panels 200 and outputs the portion of the image data D2 to be displayed on the secondary panel to the flexible wiring 300.

[0046] 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 first conductive unit 31. The current output unit 51e also controls the magnitude of the current input from the second 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 control unit 51 controls the light emission of the multiple light-emitting elements 20 of one panel 200 to which the control unit 51 belongs.

[0047] In the secondary panel, the conversion unit 51c of the 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 control unit 51 is provided, and stores it in the storage 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 storage unit 51d.

[0048] In this way, image data D1 in the first format input from outside the display device 1 is supplied only to the control unit 51 of the primary panel, and image data D2 in the second format output from the control unit 51 of the primary panel is supplied to the control unit 51 of the secondary panel. The control unit 51 of each secondary panel stores only the portion of image data D2 flowing through the flexible wiring 300 that corresponds to that panel.

[0049] Alternatively, the conversion unit 51c of the primary panel 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 that, the image data D2 corresponding to each panel 200 may be sequentially read from the external memory 400 to the storage unit 51d, and sequentially output from the storage unit 51d to the flexible wiring 300. This allows the capacity of the storage unit 51d to be reduced.

[0050] Next, control of output light from the light-emitting element 20 will be described. Fig. 9 is a diagram showing the coordinates of pixel elements in each panel. Fig. 10 is a diagram showing a green color correction database stored in the storage unit. Fig. 11 is a diagram showing a red color correction database stored in the storage unit.

[0051] As an example, the control unit 51 stores a green color correction database 51d1. The green color correction database 51d1 holds information related to energization parameters for correcting the green light output from each of the plurality of pixel elements 29. The energization parameters are parameters for controlling the energization of each of the plurality of light-emitting elements 20. The energization parameters will be described in detail later.

[0052] As shown in FIG. 10, the green correction database 51d1 includes the items "pixel coordinates", "green main current", "first chromaticity", "green secondary current", and "corrected chromaticity".

[0053] The "pixel coordinates" item is information relating to the coordinates of the pixel elements 29 on the panel 200. As an example, as shown in FIG. 9 , coordinates (Xm, Yn) are given for each panel 200. Here, n is a natural number from 1 to N, and m is a natural number from 1 to M. N and M can be set appropriately depending on the size of the panel 200 and the arrangement of the pixel elements 29.

[0054] The item "green main current" is information about the magnitude of the green main current flowing through the green light emitting element 22 included in the pixel element 29. The green main current refers to a current that is passed through the green light emitting element 22 included in the pixel element 29 in order to cause the pixel element 29 to output green light. Note that, as shown in Fig. 10, when the magnitude of the green main current in a plurality of pixel elements 29 is the same, the control unit 51 does not need to hold data on the green main current.

[0055] The item "first chromaticity" is the chromaticity of green light output from a pixel element 29 specified by the item "pixel coordinates" when a current based on the data in the item "green main current" flows through the green light-emitting element 22 included in the pixel element 29. Note that the control unit 51 does not need to store the first chromaticity data. For example, the first chromaticity data may be stored in an external memory provided outside the display device 1.

[0056] The item "green secondary current" is information about the magnitude of the green secondary current flowing through the red light-emitting element 23 included in the pixel element 29. The green secondary current refers to a current passed through the red light-emitting element 23 included in the pixel element 29 in order to cause the pixel element 29 to output green light of a desired chromaticity. In this way, when passing a green main current through the green light-emitting element 22 included in the pixel element 29, the current output unit 51e of the control unit 51 passes a green secondary current smaller than the green main current through the red light-emitting element 23 included in the pixel element 29 in order to cause the pixel element 29 to output green light of the desired chromaticity. This corrects the green light output from the pixel element 29. Note that the green light of the desired chromaticity may, for example, be green light having a chromaticity within the range of (0.300±0.05, 0.600±0.05) on the CIE chromaticity diagram.

[0057] 10, in the green correction database 51d1, when a green main current corresponding to the value Cg of the "green main current" item is passed through the green light emitting element 22 among the plurality of pixel elements 29 from pixel coordinates (X1, Y1) to pixel coordinates (Xm, Yn), more than half of the values ​​of the "green secondary current" item when passed through the red light emitting element 23 of the plurality of pixel elements 29 are the same value α. In this way, it is possible to correct the chromaticity of the green light output from the pixel elements 29 while simplifying the current control by the current output unit 51e.

[0058] Preferably, the value of the "green secondary current" item may be the same for 70 percent or more of the pixel elements 29, and more preferably, 80 percent or more of the pixel elements 29. The magnitude of the green primary current is preferably 10 times or more the magnitude of the green secondary current. This can reduce excessive reddishness in the green light emitted from the pixel elements 29.

[0059] The items "green main current" and "green secondary current" are included in the energization parameters. The energization parameters are parameters for controlling the amount of current flowing through the light-emitting element 20 included in the pixel element 29, and specific examples include a current value, a voltage value, and an integrated current value. However, the energization parameters are not limited to these examples, and may be any physical quantity that can control the amount of current flowing through the light-emitting element 20. The data in the item "green secondary current" is also referred to as a first energization parameter.

[0060] The item "corrected chromaticity" is the chromaticity of green light output from a pixel element 29 when a green main current of a magnitude corresponding to the data under the item "green main current" flows through the green light-emitting element 22 included in the pixel element 29, and a green secondary current of a magnitude corresponding to the data under the item "green secondary current" flows through the red light-emitting element 23 included in the pixel element 29. Note that the control unit 51 does not need to store the data of the corrected chromaticity.

[0061] The control unit 51 further stores a red correction database 51d2, which holds information relating to energization parameters for correcting the red light output from each of the plurality of pixel elements 29.

[0062] As shown in FIG. 11, the red correction database 51d2 includes the items "pixel coordinates", "red main current", "second chromaticity", "red secondary current", and "corrected chromaticity".

[0063] The item “pixel coordinates” is information relating to the coordinates of the pixel element 29 on the panel 200 .

[0064] The item "red main current" is the magnitude of the red main current flowing through the red light emitting element 23 included in the pixel element 29. The red main current refers to a current that is passed through the red light emitting element 23 in order to cause the pixel element 29 to output red light. Note that, as shown in Fig. 10, when the magnitude of the red main current in a plurality of pixel elements 29 is the same, the control unit 51 does not need to hold data on the red main current.

[0065] The item "second chromaticity" is the chromaticity of red light output from the pixel element 29 specified by the item "pixel coordinates" when a current based on the data in the item "red main current" flows through the red light-emitting element 23 included in the pixel element 29. Note that the control unit 51 does not need to store the second chromaticity data. For example, the second chromaticity data may be stored in an external memory provided outside the display device 1.

[0066] The item "red secondary current" is information regarding the magnitude of the red secondary current flowing through the green light-emitting element 22 included in the pixel element 29. The red secondary current refers to a current passed through the green light-emitting element 22 included in the pixel element 29 in order to cause the pixel element 29 to output red light of a desired chromaticity. In this way, when passing a red main current through the red light-emitting element 23 included in the pixel element 29, the current output unit 51e of the control unit 51 passes a red secondary current smaller than the red main current through the green light-emitting element 22 included in the pixel element 29 in order to cause the pixel element 29 to output red light of a desired chromaticity. This corrects the red light output from the pixel element 29. Note that the red light of a desired chromaticity may, for example, be red light having a chromaticity within the range of (0.640±0.05, 0.330±0.05) on the CIE chromaticity diagram.

[0067] 11 , in the red correction database 51d2, when a value Cr is passed as a red main current to the red light emitting element 23 in a plurality of pixel elements 29 from pixel coordinates (X1, Y1) to pixel coordinates (Xm, Yn), more than half of the values ​​of the red secondary currents passed to the green light emitting elements 22 of the plurality of pixel elements 29 are the same value β. In this way, it is possible to correct the chromaticity of the red light output from the pixel elements 29 while simplifying the current control by the current output unit 51e.

[0068] Preferably, the value of the "red secondary current" item may be the same for 70 percent or more of the pixel elements 29, and more preferably, 80 percent or more of the pixel elements 29. The magnitude of the red main current is preferably 10 times or more the magnitude of the red secondary current. This can reduce excessive greenishness in the red light emitted from the pixel elements 29.

[0069] The items "red main current" and "red secondary current" are included in the energization parameters. Examples of the energization parameters include, but are not limited to, a current value, a voltage value, and an integrated current value, and any physical quantity that can control the amount of current flowing through the light-emitting element 20 included in the pixel element 29 may be used. The data for the item "red secondary current" is also referred to as a second energization parameter.

[0070] The item "corrected chromaticity" is the chromaticity of red light output from a pixel element 29 when a red main current of a magnitude corresponding to the data under the item "red main current" flows through the red light emitting element 23 included in the pixel element 29, and a red secondary current of a magnitude corresponding to the data under the item "red secondary current" flows through the green light emitting element 22 included in the pixel element 29. Note that the control unit 51 does not need to store the data of the corrected chromaticity.

[0071] Next, the operation of the display device 1 according to this embodiment will be described. As shown in Fig. 1, in this embodiment, image data input from outside the display device 1 is distributed to each panel 200 via flexible wiring 300 by bus address connection.

[0072] 8, image data D1 in the first format is input from outside the display device 1 to the control unit 51 of the primary panel via flexible wiring 300. The image data D1 corresponds to one image to be displayed by the display device 1.

[0073] The conversion unit 51c of the primary panel converts the image data D1 in the first format into image data D2 in the second format. At this time, the conversion unit 51c adds address data corresponding to each panel 200 to the image data D2. The conversion unit 51c then outputs the image data D2 to the storage unit 51d.

[0074] The storage unit 51d of the primary panel references the address data and outputs the portion of the image data D2 to be displayed by the primary panel to the current output unit 51e, and outputs the remaining portion to the flexible wiring 300. Note that the storage unit 51d of the primary panel may output all of the image data D2 to the flexible wiring 300.

[0075] The current output unit 51e of the primary panel controls the light emission of the light-emitting elements 20 provided on the primary panel based on image data D2. The current output unit 51e applies a first potential V1 to the first electrode of each light-emitting element 20 via the first conductive unit 31, and controls the amount of current flowing from the second electrode of each light-emitting element 20 to the current output unit 51e via the second conductive unit 32 based on image data D2.

[0076] Furthermore, the current output unit 51e refers to the green correction database 51d1 and passes a first green secondary current smaller than the first green main current to the red light emitting element 23 included in the first pixel element, in order to output green light of the desired chromaticity from the first pixel element when passing a first green main current through the green light emitting element 22 included in a first pixel element that is one of the plurality of pixel elements 29. The green main current passed through the green light emitting element 22 included in the first pixel element is also referred to as the first green main current, and the green secondary current passed through the red light emitting element 23 included in the first pixel element is also referred to as the first green secondary current.

[0077] Furthermore, the current output unit 51e, by referring to the red correction database 51d2, passes a first red secondary current smaller than the first red main current to the green light emitting element 22 included in the first pixel element when passing a first red main current through the red light emitting element 23 included in the first pixel element, in order to output red light of a desired chromaticity from the first pixel element. The red main current passed through the red light emitting element 23 included in the first pixel element is also referred to as the first red main current, and the red secondary current passed through the green light emitting element 22 included in the first pixel element is also referred to as the first red secondary current.

[0078] Fig. 12 is a chromaticity diagram illustrating the correction of green light and red light output from a pixel element. In Fig. 12, chromaticity Pg included in region R1 of the CIE chromaticity diagram M is an example of the chromaticity of green light output from a pixel element 29 when a green main current is passed through the green light-emitting element 22 included in the pixel element 29. Chromaticity Qg included in region R2 of the chromaticity diagram M is an example of the chromaticity of green light output from the pixel element 29 when a green main current is passed through the green light-emitting element 22 included in the pixel element 29 and a green secondary current is passed through the red light-emitting element 23 included in the pixel element 29. That is, as shown in Fig. 12, by controlling the green secondary current by the current output unit 51e, the chromaticity of the green light output from the pixel element 29 is corrected from the chromaticity Pg included in region R1 to the chromaticity Qg included in region R2, which has smaller chromaticity variation than the chromaticity Pg.

[0079] 12 , by controlling the red secondary current by the current output unit 51 e, the chromaticity of the red light output from the pixel element 29 is corrected from the chromaticity Pr in region R3 of the chromaticity diagram M to the chromaticity Qr in region R4 of the chromaticity diagram M, where the red secondary current is applied to the green light emitting element 22 included in the pixel element 29 while the red main current is applied to the red light emitting element 23 included in the pixel element 29. As shown in FIG. 12 , by controlling the red secondary current by the current output unit 51 e, the chromaticity of the red light output from the pixel element 29 is corrected from the chromaticity Pr in region R3 to the chromaticity Qr in region R4, where the chromaticity variation is smaller than that of the chromaticity Pr.

[0080] In this way, by controlling the green secondary current to the red light-emitting element 23 by the current output unit 51e, variations in the chromaticity of the green light output from the pixel elements 29 can be reduced. Furthermore, by controlling the red secondary current to the green light-emitting element 22 by the current output unit 51e, variations in the chromaticity of the red light output from the pixel elements 29 can be reduced. The multiple pixel elements 29 included in the panel 200 output light of a chromaticity encompassed by 85 percent or more of the sRGB color gamut in the CIE chromaticity diagram M. For simplicity, the above description has been given with reference to the green main current, green secondary current, red main current, and red secondary current as current values. However, because the light emission amount of each light-emitting element is the product of the current value and the light-emitting time, the same effect can be achieved by controlling both the current value and the light-emitting time, or by controlling only the light-emitting time. This also applies to the various embodiments and modifications described below.

[0081] In this way, each light-emitting element 20 emits light with a predetermined chromaticity and luminance. The light emitted from each light-emitting element 20 passes through the first support member 10 and the mounting substrate 100 and is emitted in the −Z direction from the display device 1. This causes a part of an image to be displayed on the primary panel.

[0082] At least a portion of the image data D2 is input from the control unit 51 of the primary panel to the control unit 51 of the secondary panel other than the primary panel via the flexible wiring 300. The conversion unit 51c of each secondary panel retrieves the portion of the image data D2 to be displayed by that panel 200 based on the address data included in the image data D2 and stores it in the memory unit 51d. The current output unit 51e then causes each light-emitting element 20 to emit light based on the image data D2 stored in the memory unit 51d. Light emitted from each light-emitting element 20 of each secondary panel passes through the first support member 10 and the mounting board 100 and is emitted from the display device 1 in the -Z direction. In this way, each secondary panel displays a portion of an image. Each panel 200 displays a portion of the image, and the display device 1 as a whole displays a single image.

[0083] It is also possible to connect an external memory 400 to the conversion unit 51c of the primary panel, temporarily store the image data D2 converted by the conversion unit 51c in the external memory 400, and then sequentially output the image data D2 corresponding to each panel 200 to the storage unit 51d. Furthermore, in the present embodiment, an example has been shown in which the control unit 51 passively controls each light-emitting element 20 via the first conductive unit 31 and the second conductive unit 32, but the method of controlling the light-emitting elements 20 is not limited to this, and for example, a transistor may be provided for each light-emitting element 20, and the control unit 51 may actively control each light-emitting element 20.

[0084] Next, a description will be given of a method for manufacturing the display device 1. Fig. 13 is a flow chart showing an example of a method for manufacturing the display device.

[0085] In step S100, a preparation step is performed. In the preparation step, a display device 1 is prepared, which includes a plurality of pixel elements 29 configured by a plurality of light-emitting elements 20, including a green light-emitting element 22 that outputs green light and a red light-emitting element 23 that outputs red light, a control unit 51 that controls the supply of current to each of the plurality of light-emitting elements 20, and a storage unit 51d that stores current-supply parameters for controlling the supply of current to the plurality of light-emitting elements 20. In this specification, preparation includes manufacturing or acquisition, including purchase.

[0086] In step S200, a first chromaticity measurement step is performed. In the first chromaticity measurement step, a measurement green main current is passed through the green light-emitting element 22 included in a first pixel element, which is one of the pixel elements 29. Then, a first chromaticity, which is the chromaticity of green light output from the green light-emitting element 22 included in the first pixel element, is measured. The chromaticity of the green light can be measured using, for example, a commercially available LED light measuring instrument or a high-resolution camera. Note that the measurement green main current refers to a green main current passed through the green light-emitting element 22 in order to measure the chromaticity (or / and luminance) of green light output from the pixel element 29 during the manufacturing process of the display device 1.

[0087] In step S300, a first energization parameter calculation step is performed. In the first energization parameter calculation step, a first energization parameter for passing a first green secondary current through the red light-emitting element 23 included in the first pixel element is calculated based on the measured first chromaticity so as to output green light of a desired chromaticity from the first pixel element. Specifically, for example, the magnitude of the green secondary current passed through the red light-emitting element 23 included in the first pixel element is gradually increased while measuring the corrected chromaticity of the green light output from the first pixel element. The energization parameter for passing the green secondary current through the red light-emitting element 23 when the corrected chromaticity reaches the desired chromaticity may be set as the first energization parameter. Alternatively, a first energization parameter for passing a first green secondary current through the red light-emitting element 23 included in the first pixel element so as to output green light of a desired chromaticity from the first pixel element may be calculated based on the measured first chromaticity and data measuring the chromaticity of another red light-emitting element having performance equivalent to that of the red light-emitting element 23 included in the first pixel element.

[0088] In step S400, a second chromaticity measurement step is performed. In the second chromaticity measurement step, a first red main current is passed through the red light-emitting element 23 included in the first pixel element. Then, a second chromaticity, which is the chromaticity of red light output from the red light-emitting element 23 included in the first pixel element at this time, is measured. The chromaticity of the red light can be measured using, for example, a commercially available LED light measuring instrument or a high-resolution camera. Note that the measurement red main current refers to a red main current passed through the red light-emitting element 23 in order to measure the chromaticity (or / and luminance) of red light output from the pixel element 29 during the manufacturing process of the display device 1.

[0089] In step S500, a second energization parameter calculation step is performed. In the second energization parameter calculation step, a second energization parameter is calculated based on the measured second chromaticity to pass a first red secondary current through the green light-emitting element 22 included in the first pixel element so that red light of a desired chromaticity is output from the first pixel element. Specifically, for example, the magnitude of the red secondary current passed through the green light-emitting element 22 included in the first pixel element is gradually increased while measuring the corrected chromaticity of the red light output from the first pixel element. The energization parameter for passing the red secondary current through the green light-emitting element 22 when the corrected chromaticity becomes the desired chromaticity may be set as the second energization parameter. Alternatively, a second energization parameter for passing the first red secondary current through the green light-emitting element 22 included in the first pixel element so that red light of a desired chromaticity is output from the first pixel element may be calculated based on the measured second chromaticity and data measuring the chromaticity of another green light-emitting element having performance equivalent to that of the green light-emitting element 22 included in the first pixel element.

[0090] In step S1000, a parameter storage process is performed. In the parameter storage process, the calculated first and second energization parameters are stored in the storage unit 51d. As an example, the calculated first energization parameters are stored in a green correction database 51d1 of the storage unit 51d. Also, the calculated second energization parameters are stored in a red correction database 51d2 of the storage unit 51d.

[0091] The calculation process of the first energization parameter and the second energization parameter for the first pixel element, which is one of the pixel elements 29, has been described above, but the calculation process may also be performed for multiple pixel elements. As an example, the first energization parameter and the second energization parameter may be calculated for all pixel elements 29 in the panel 200, i.e., all pixel elements 29 from pixel coordinates (X1, Y1) to pixel coordinates (XM, YN). Alternatively, the first energization parameter and the second energization parameter may be calculated for only some of the pixel elements 29 in the panel 200. Furthermore, only one of the first energization parameter and the second energization parameter may be calculated for at least some of the pixel elements 29.

[0092] Next, the effects of this embodiment will be described. The display device 1 according to this embodiment displays an image by controlling and lighting each of the light-emitting elements 20. This allows for reduced power consumption compared to when an image is displayed using a liquid crystal panel.

[0093] 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.

[0094] 3 and 7 , in this embodiment, a first light adjustment member 61 having light absorption properties is disposed around each of the light emitting elements 20. This makes it possible to reduce the amount of external light that has passed through the mounting substrate 100 and the first support member 10 reaching the first conductive portion 31 and the second conductive portion 32. As a result, it is possible to reduce the influence of external light reflected by the first conductive portion 31 and the second conductive portion 32 on the image.

[0095] Furthermore, in this embodiment, the blue light-emitting elements 21, green light-emitting elements 22, and red light-emitting elements 23 are arranged in each pixel element 29 along the second direction Y. This allows the element region 13 to be miniaturized in the first direction X, leaving more space in the wiring region 14. Furthermore, it is easier to connect the multiple light-emitting elements 20 belonging to each pixel element 29 to a common first conductive portion 31. In this specification, "the blue light-emitting elements 21, green light-emitting elements 22, and red light-emitting elements 23 are arranged in the second direction Y" means that at least a portion of each of the blue light-emitting elements 21, green light-emitting elements 22, and red light-emitting elements 23 is located on a straight line along the second direction Y. Note that the arrangement of the light-emitting elements 20 in each pixel element 29 is not limited to this, and three light-emitting elements may be arranged in a triangle, four light-emitting elements may be arranged in two rows and two columns, or multiple light-emitting elements may be stacked in the third direction Z.

[0096] Furthermore, in this embodiment, the control unit 51 is located between the image forming area 11 and the wiring connection area 12 in the second direction Y. This makes it easier to shorten the distance between the control unit 51 and the image forming area 11 in the second direction Y than when the wiring connection area 12 is located between the image forming area 11 and the control unit 51. As a result, it becomes easier to shorten the length of the first conductive portion 31 and / or the second conductive portion 32, making it easier to reduce the wiring resistance of the first conductive portion 31 and / or the second conductive portion 32. Note that the wiring connection area 12 may be located between the image forming area 11 and the control unit 51 in the second direction Y.

[0097] Furthermore, in this embodiment, the control unit 51 refers to the green correction database 51d1, and when a first green main current is passed through the green light-emitting element 22 included in a first pixel element, which is one of the multiple pixel elements 29, a first green secondary current smaller than the first green main current is passed through the red light-emitting element 23 included in the first pixel element in order to output green light of the desired chromaticity from the first pixel element.

[0098] By doing this, the green light output from the plurality of pixel elements 29 can be corrected to a reddish hue, and in a display device 1 having a plurality of pixel elements 29, the variation in chromaticity of the green light output from the pixel elements 29 can be reduced.

[0099] In addition, the control unit 51 refers to the red correction database 51d2, and when a first red main current is passed through the red light-emitting element 23 included in the first pixel element, a first red secondary current smaller than the first red main current is passed through the green light-emitting element 22 included in the first pixel element in order to output red light of the desired chromaticity from the first pixel element.

[0100] By doing so, the red light output from the plurality of pixel elements 29 can be corrected to a greenish hue, and in a display device 1 including the plurality of pixel elements 29, variations in chromaticity of the red light output from the pixel elements 29 can be reduced. In particular, variations in chromaticity caused by variations in the peak wavelength of the green light-emitting element that outputs green light and the peak wavelength of the red light-emitting element that outputs red light are easily noticeable. However, by appropriately adding the green light output from the green light-emitting element and the red light output from the red light-emitting element, variations in chromaticity of the green light and / or red light output from the plurality of pixel elements 29 can be reduced. This can also improve the yield of the display device 1.

[0101] The magnitudes of the green main current and the red main current may be adjusted as appropriate according to the pixel coordinates of the pixel elements 29. As an example, the control unit 51 may cause the magnitudes of the green main current and the red main current to differ for the pixel elements 29 arranged at positions closest to the edge of the panel 200 compared to the other pixel elements 29.

[0102] Specifically, when the control unit 51 causes each of the plurality of pixel elements 29 on the first support member 10 to output green light of a desired chromaticity, the control unit 51 may make the second green main current flowing through the green light-emitting element 22 included in the second pixel element, which is one of the pixel elements positioned closest to the second support member in the first direction X, larger than the third green main current flowing through the green light-emitting element 22 included in the third pixel element, which is one of the plurality of pixel elements different from the second pixel element. For example, the third pixel element is located on the −X direction side of the second pixel element, extending from the second support member toward the first support member. The second pixel element located near the outer edge of the first support member 10 tends to have fewer adjacent pixel elements than the pixel elements located near the center of the first support member 10, and therefore may have lower luminance. Therefore, by making the second green main current flowing through the green light-emitting element 22 included in the second pixel element larger than the third green main current flowing through the green light-emitting element 22 included in the third pixel element, uneven luminance of the display device 1 can be reduced. The same applies to the red main current.

[0103] Conversely, the control unit 51 may make the second green main current flowing through the green light-emitting element 22 included in the second pixel element placed at a position closest to the second support member in the first direction X smaller than the third green main current flowing through the green light-emitting element 22 included in the third pixel element. The same applies to the red main current.

[0104] In these cases, the green correction database 51d1 (or the red correction database 51d2) may store data for the item "green main current" (or "red main current") so that the magnitude of the green main current (or red main current) varies depending on the pixel coordinates. This makes it possible to reduce variations in the luminance of green light (or red light) due to differences in pixel coordinates.

[0105] <First Modification of First Embodiment> Fig. 14 is a flow diagram showing an example of a manufacturing method of a display device according to the first modification. Fig. 15 is a diagram showing changes in chromaticity according to the first modification. Fig. 16 is a diagram showing correction of chromaticity for each pixel according to the first modification.

[0106] In the first variant, in the manufacturing method of the display device 1, the current flow parameters related to chromaticity correction are uniformly calculated for multiple pixel elements 29 included in the panel 200, and then the current flow parameters are calculated individually for pixel elements 29 outside a predetermined chromaticity range.

[0107] As shown in FIG. 14, in the first modified example, the first current parameter calculation process (S300) includes a third chromaticity measurement process (S310), a third current parameter calculation process (S320), a fourth chromaticity measurement process (S330), and a first green current parameter calculation process (S340).

[0108] In step S310, a third chromaticity measurement step is performed. In the third chromaticity measurement step, a measurement green main current is passed through the green light emitting elements 22 included in each of the plurality of pixel elements 29 of the panel 200, and a plurality of third chromaticities of the green light output from each of the plurality of green light emitting elements 22 are measured. Variations may occur in the plurality of third chromaticities output from each of the plurality of green light emitting elements 22 in the panel 200. In the third chromaticity measurement step, each of the plurality of third chromaticities is measured.

[0109] In step S320, a third energization parameter calculation step is performed. In the third energization parameter calculation step, a third energization parameter is calculated based on the measured third chromaticities to supply a provisional green secondary current to the red light-emitting element 23 included in each of the pixel elements 29 so that a desired green light is output from at least some of the pixel elements 29. The provisional green secondary current refers to a green secondary current having a provisionally assigned current amount during the manufacturing process of the display device 1. Specifically, for example, a third chromaticity with the smallest variation (i.e., the most average position on the chromaticity diagram) is selected from the multiple third chromaticities, and a pixel element 29 including a green light-emitting element 22 that emits green light of that third chromaticity is selected. Then, the magnitude of the green secondary current supplied to the red light-emitting element 23 included in the selected pixel element 29 is gradually increased while measuring the corrected chromaticity of the green light output from that pixel element 29. At the timing when the post-correction chromaticity becomes the desired chromaticity, the energization parameter for passing a green secondary current through the red light emitting element 23 may be set as the third energization parameter. Furthermore, one third energization parameter for passing a provisional green secondary current through the red light emitting element 23 included in each of the plurality of pixel elements 29 may be calculated based on data measuring the third chromaticity with the smallest variation and the chromaticities of other red light emitting elements having performance equivalent to that of the red light emitting element 23 included in the selected pixel element 29.

[0110] In step S330, a fourth chromaticity measurement step is performed in which a measurement green main current is passed through the green light-emitting element 22 included in a first pixel element that is one of the plurality of pixel elements 29, and a tentative green secondary current based on the calculated third energization parameter is passed through the red light-emitting element 23 included in the first pixel element, and the fourth chromaticity is measured.

[0111] In step S340, a first green energization parameter calculation process is performed. In the first green energization parameter calculation process, if the fourth chromaticity is within the predetermined color gamut range, the third energization parameter is set as the first energization parameter. On the other hand, if the fourth chromaticity is outside the predetermined color gamut range, the first energization parameter is calculated based on the fourth chromaticity. Specifically, the corrected chromaticity of the green light output from the first pixel element is measured while gradually changing the magnitude of the temporary green secondary current flowing through the red light-emitting element 23 included in the first pixel element. When the corrected chromaticity reaches a desired chromaticity, the energization parameter for flowing the temporary green secondary current through the red light-emitting element 23 may be set as the first energization parameter. Alternatively, the first energization parameter may be calculated based on data measured for the fourth chromaticity and the chromaticity of another red light-emitting element having performance equivalent to that of the red light-emitting element 23 included in the first pixel element.

[0112] 15 , the chromaticity included in region R1 indicates the third chromaticity of the green light output from each of the plurality of pixel elements 29 when, in step S310, a measurement green main current is passed through the green light emitting element 22 of each of the plurality of pixel elements 29. In contrast, the chromaticity included in region R2 indicates the fourth chromaticity output from each of the plurality of pixel elements 29 when, in step S330, a measurement green main current is passed through the green light emitting element 22 of each of the plurality of pixel elements 29 while a temporary green secondary current based on the third energization parameter is passed through the red light emitting element 23 of each of the pixel elements 29. As described above, in the first modified example, the third energization parameter for passing a temporary green secondary current through the red light emitting element 23 is first calculated uniformly for each of the plurality of pixel elements 29.

[0113] Then, for each pixel element 29, it is determined whether the chromaticity of the green light corrected by flowing the provisional green secondary current based on the third energization parameter to the red light emitting element 23 (i.e., the fourth chromaticity) is within a predetermined color gamut range. If the fourth chromaticity is within the predetermined color gamut range, the third energization parameter is set as the first energization parameter.

[0114] 16, for the chromaticities Qg1 and Qg2 whose fourth chromaticities are outside the predetermined color gamut TH, energization parameters are calculated to bring them within the predetermined color gamut, thereby calculating first energization parameters to bring the chromaticities Q'g1 and Q'g2 into the predetermined color gamut.

[0115] In this way, it is only necessary to uniformly calculate the third energization parameter for the plurality of pixel elements 29 included in the panel 200, and then calculate the first energization parameter individually only for the pixel elements whose fourth chromaticity falls outside the predetermined color gamut range, thereby simplifying the calculation of the energization parameters necessary for chromaticity correction of the plurality of pixel elements 29. As described above, it is preferable to calculate one third energization parameter for each panel 200, but it is also possible to calculate multiple third energization parameters for the panel 200.

[0116] As shown in FIG. 15 , in the CIE chromaticity diagram, the difference D1 (more precisely, the absolute value of the difference; the same applies below) between X1, the X value of the first chromaticity Pg1, and X2, the X value of the fourth chromaticity Qg1, is preferably greater than the difference D2 between X2, the X value of the fourth chromaticity Qg1, and X3, the X value of the chromaticity Q′g1 when a first green secondary current based on the first energization parameters calculated based on the fourth chromaticity is applied. This makes it easier for the fourth chromaticity to fall within the predetermined color gamut range for the plurality of pixel elements 29. As a result, the number of times the first energization parameter calculation step, which is performed individually when the fourth chromaticity falls outside the predetermined color gamut range, can be reduced, thereby simplifying the calculation of the first energization parameters. By making it easier for the fourth chromaticity to fall within the predetermined color gamut range for the plurality of pixel elements 29, the first green secondary currents applied to the red light-emitting elements 23 of the plurality of pixel elements 29 are more likely to be the same value. For example, it is preferable that at least half of the first green secondary currents flowing through the red light emitting elements 23 of the plurality of pixel elements 29 have the same value. Also, for example, D1 is preferably at least twice as large as D2, and more preferably at least five times as large.

[0117] Furthermore, in the CIE chromaticity diagram, the difference D3 between Y1, the Y value of the first chromaticity Pg1, and Y2, the Y value of the fourth chromaticity Qg1, is preferably greater than the difference D4 between Y2, the Y value of the fourth chromaticity Qg1, and Y3, the Y value of the chromaticity Q'g1 when a first green secondary current based on the first current parameters calculated based on the fourth chromaticity Qg1 is passed. This simplifies the calculation of the first current parameters. For example, D3 is preferably at least twice as large as D4, and more preferably at least five times as large.

[0118] In the above description, as the first modified example, the first energization parameter, which is the energization parameter for the first green secondary current to be passed through the red light-emitting element 23 of the first pixel element included in the plurality of pixel elements 29, has been described, but the same processing can be performed for the second energization parameter, which is the energization parameter for the first red secondary current to be passed through the green light-emitting element 22 of the first pixel element. That is, in calculating the second energization parameter for the first red secondary current to be passed through the green light-emitting element 22 of the first pixel element included in the plurality of pixel elements 29, a uniform energization parameter may be calculated for the plurality of pixel elements 29, and then the energization parameter may be calculated individually for each pixel element 29 that falls outside the predetermined chromaticity range.

[0119] <Second Modification of First Embodiment> Fig. 17 is a diagram showing a green correction database 51d3 in the second modification. Fig. 18 is a diagram showing a red correction database 51d4 in the second modification. The second modification differs from the above embodiment in that luminance correction is performed in addition to chromaticity correction.

[0120] As shown in FIG. 17, the green correction database 51d3 in the second modified example includes, in addition to the items described in the above embodiment, an item "first luminance", an item "corrected green main current", and an item "corrected luminance".

[0121] The item "first brightness" is the brightness of the green light output from the green light-emitting element 22 included in the pixel element 29 of the panel 200 when a current based on the item "green main current" flows through the green light-emitting element 22.

[0122] The item "corrected green main current" is an energization parameter for correcting the green main current flowing through the green light emitting element 22 included in the pixel element 29. The data in the item "green main current correction value" is also referred to as a fourth energization parameter.

[0123] The item "corrected brightness" is the brightness of the green light output from a pixel element 29 when a green main current based on the fourth current parameter of the item "corrected green main current" flows through the green light-emitting element 22 included in the pixel element 29, and a green secondary current based on the first current parameter of the item "green secondary current" flows through the red light-emitting element 23 included in the pixel element 29.

[0124] In the second modified example, when the first pixel element, which is one of the plurality of pixel elements 29, emits green light of desired chromaticity and luminance, the current output unit 51e refers to the green correction database 51d3 and passes a green main current to the green light-emitting element 22 included in the first pixel element based on the fourth current-carrying parameter of the item "corrected green main current." Furthermore, the current output unit 51e passes a green secondary current to the red light-emitting element 23 included in the first pixel element based on the first current-carrying parameter of the item "green secondary current." In this way, when the plurality of pixel elements 29 emit green light, it is possible to reduce variations in chromaticity as in the above embodiment, while also reducing variations in luminance.

[0125] As shown in FIG. 18, the red correction database 51d4 in the second modified example includes, in addition to the items described in the above embodiment, an item "second luminance", an item "corrected red main current", and an item "corrected luminance".

[0126] The item "second brightness" is the brightness of the red light output from the red light-emitting element 23 included in the pixel element 29 of the panel 200 when a current based on the item "red main current" flows through the red light-emitting element 23.

[0127] The item “corrected red main current” is a current-carrying parameter for correcting the red main current flowing through the red light-emitting element 23 included in the pixel element 29 .

[0128] The item "corrected brightness" is the brightness of red light output from a pixel element 29 when a red main current based on the current flow parameters of the item "corrected red main current" flows through the red light-emitting element 23 included in the pixel element 29, and a red secondary current based on the second current flow parameters of the item "red secondary current" flows through the green light-emitting element 22 included in the pixel element 29.

[0129] In the second modified example, when the first pixel element, which is one of the plurality of pixel elements 29, emits red light of desired chromaticity and luminance, the current output unit 51e references the red correction database 51d4 and passes a red main current to the red light emitting element 23 included in the first pixel element based on the current flow parameters in the item "corrected red main current." Furthermore, the current output unit 51e passes a red secondary current to the green light emitting element 22 included in the first pixel element based on the second current flow parameters in the item "red secondary current." In this way, when the plurality of pixel elements 29 emit red light, it is possible to reduce variations in chromaticity as in the above embodiment, while also reducing variations in luminance.

[0130] Fig. 19 is a flow chart showing the first half of the method for manufacturing the display device 1 in the second modified example. Fig. 20 is a flow chart showing the second half of the method for manufacturing the display device 1 in the second modified example. Next, the manufacturing method in the second modified example will be described.

[0131] In the manufacturing method of the second variant, in addition to each step in the above-mentioned implementation process, a first brightness measurement step (S600), a second brightness measurement step (S700), a fourth current parameter calculation step (S800), and a red current parameter calculation step (S900) are provided.

[0132] In step S600, a first luminance measurement step is performed. In the first luminance measurement step, a measurement green main current is passed through a green light emitting element 22 included in a first pixel element among the plurality of pixel elements 29 included in panel 200, and a first luminance of green light output from the green light emitting element 22 is measured. The first luminance of green light can be measured using, for example, a commercially available LED light meter or a high-resolution camera.

[0133] In step S700, a second luminance measurement step is performed. In the second luminance measurement step, a second luminance of red light output from the red light emitting element 23 included in the first pixel element is measured when a measurement red main current is passed through the red light emitting element 23 included in the first pixel element. The second luminance of red light can be measured using, for example, a commercially available LED light meter or a high-resolution camera.

[0134] In step S800, a fourth energization parameter calculation step is performed. In the fourth energization parameter calculation step, a fourth energization parameter relating to the magnitude of the green main current to be passed through the green light-emitting element 22 and a first energization parameter relating to the magnitude of the green secondary current to be passed through the red light-emitting element 23 are calculated based on the measured first luminance, second luminance, and first chromaticity in order to output green light of desired luminance and chromaticity. Specifically, without changing the ratio between the green main current and the green secondary current used in calculating the first energization parameter in the preceding first energization parameter calculation step (S300), the values ​​of the green main current and the green secondary current are corrected so that the green light output from the pixel element 29 has the desired luminance, and a fourth energization parameter and a first energization parameter for this correction are calculated.

[0135] Specifically, "without changing the ratio of the green main current to the green secondary current" means that, assuming that the ratio of the green secondary current to the green main current based on the first energizing parameters calculated in the first energizing parameter calculation step (S300) is P1 and the ratio of the green secondary current to the green main current based on the corrected fourth energizing parameters is P2, P1 and P2 are approximately equal. For example, it is preferable that the relationship 0.8≦P1 / P2≦1.2 is satisfied.

[0136] In step S900, a red energization parameter calculation step is performed. In the red energization parameter calculation step, a red energization parameter relating to the magnitude of the red main current to be passed through the red light emitting element 23 and a second energization parameter relating to the magnitude of the red secondary current to be passed through the green light emitting element 22 are calculated based on the measured first luminance, second luminance, and second chromaticity in order to output red light of desired luminance and chromaticity. Specifically, without changing the ratio between the red main current and the red secondary current when the second energization parameter was calculated in the preceding second energization parameter calculation step (S500), the values ​​of the red main current and the red secondary current are corrected so that the red light output from the pixel element 29 has the desired luminance, and a red energization parameter and a second energization parameter for this correction are calculated.

[0137] Specifically, "without changing the ratio of the red main current to the red secondary current" means that, assuming that the ratio of the red secondary current to the red main current based on the second energization parameters calculated in the second energization parameter calculation step (S500) is P3 and the ratio of the red secondary current to the red main current based on the corrected red energization parameters is P4, P3 and P4 should be approximately equal. For example, it is preferable that the relationship 0.8≦P3 / P4≦1.2 be satisfied.

[0138] In step S1000, a parameter storage step is performed in which the first energization parameter for controlling the green main current, the second energization parameter for controlling the green secondary current, the red energization parameter for controlling the red main current, and the fourth energization parameter for controlling the red secondary current calculated in the above steps are stored in the storage unit 51d.

[0139] 21 is a flow chart showing an example of a manufacturing method of the display device 1 according to the third modification. In the third modification, with respect to the luminance correction in the second modification, energization parameters related to the luminance correction are uniformly calculated for a plurality of pixel elements 29 included in the panel 200, and then energization parameters are individually calculated for pixel elements 29 outside a predetermined luminance range.

[0140] As shown in FIG. 21 , in the third modified example, the fourth energization parameter calculation process (S800) includes a third chromaticity measurement process (S810), a third luminance measurement process (S820), a fourth chromaticity measurement process (S830), a fourth luminance measurement process (S840), a fifth energization parameter calculation process (S850), a sixth energization parameter calculation process (S860), a fifth luminance measurement process (S870), and a second green energization parameter calculation process (S880).

[0141] In step S810, a third chromaticity measurement step is performed. In the third chromaticity measurement step, a measurement green main current is passed through the green light emitting element 22 included in each of the plurality of pixel elements 29 of the panel 200, and a plurality of third chromaticities of the green light output from each of the plurality of green light emitting elements 22 are measured.

[0142] In step S820, a third brightness measurement step is performed. In the third brightness measurement step, a measurement green main current is passed through the green light emitting element 22 included in each of the plurality of pixel elements 29 of the panel 200, and a plurality of third brightnesses of the green light output from each of the plurality of green light emitting elements 22 are measured. Note that steps S810 and S820 may be performed simultaneously.

[0143] In step S830, a fourth chromaticity measurement step is performed in which a measurement red main current is passed through the red light emitting element 23 included in each of the plurality of pixel elements 29 of the panel 200, and a plurality of fourth chromaticities of the red light output from each of the plurality of red light emitting elements 23 are measured.

[0144] In step S840, a fourth brightness measurement step is performed. In the fourth brightness measurement step, a measurement red main current is passed through the red light emitting element 23 included in each of the plurality of pixel elements 29 of the panel 200, and a plurality of fourth brightnesses of the red light output from each of the plurality of red light emitting elements 23 are measured. Note that steps S830 and S840 may be performed simultaneously.

[0145] In step S850, a fifth energization parameter calculation step is performed. In the fifth energization parameter calculation step, a fifth energization parameter is calculated based on the measured third chromaticities, third luminances, fourth chromaticities, and fourth luminances. The fifth energization parameter is used to pass a provisional green main current through the green light-emitting elements 22 so as to output a desired green light from at least some of the pixel elements 29. The provisional green main current refers to a green main current having a provisionally given current amount during the manufacturing process of the display device 1.

[0146] Specifically, for example, the third luminance having the least variation (i.e., closest to the average value) is selected from the plurality of third luminances, and the pixel element 29 including the green light-emitting element 22 that emits green light of that third luminance is selected. Then, based on the plurality of measured third chromaticities, the fifth current parameter is calculated so that the green light output from the pixel element 29 has a desired luminance without changing the ratio between the green main current and the green secondary current when calculated.

[0147] In step S860, a sixth energization parameter calculation step is performed. In the sixth energization parameter calculation step, one sixth energization parameter is calculated for passing a provisional green secondary current through the plurality of red light-emitting elements 23 so as to output a desired green light from at least some of the plurality of pixel elements 29. Specifically, for example, for the pixel element 29 selected in the preceding fifth energization parameter calculation step (S850), based on the plurality of measured third chromaticities, a sixth energization parameter is calculated for passing a green secondary current corresponding to the green main current based on the fifth energization parameter of the pixel element 29, without changing the ratio between the green main current and the green secondary current when calculated.

[0148] In step S870, a fifth luminance measurement step is performed, in which a temporary green main current based on the fifth energization parameters is passed through the green light-emitting element 22 included in the first pixel element, and a temporary green secondary current based on the sixth energization parameters is passed through the red light-emitting element 23 included in the first pixel element, and a fifth luminance is measured.

[0149] In step S880, a second green energization parameter calculation step is performed. In the second green energization parameter calculation step, if the fifth luminance is within a predetermined luminance range, the fifth energization parameter is set as the fourth energization parameter. On the other hand, if the fifth luminance is outside the predetermined luminance range, the fourth energization parameter is calculated based on the fifth luminance. Specifically, the luminance of the green light output from the first pixel element is measured while gradually changing the magnitude of the provisional green main current flowing through the green light emitting element 22 included in the first pixel element and the magnitude of the provisional green secondary current flowing through the red light emitting element 23 without changing the ratio between the provisional green main current and the provisional green secondary current. When the green light output from the first pixel element reaches a desired luminance, the energization parameter for flowing the first green main current through the green light emitting element 22 may be set as the fourth energization parameter. Alternatively, the fourth energization parameter for flowing the first green main current through the green light emitting element 22 included in the first pixel element may be calculated based on the measured fifth luminance and data measuring the luminance of another green light emitting element having performance equivalent to that of the green light emitting element 22 included in the first pixel element.

[0150] In this way, it is only necessary to uniformly calculate the fifth energization parameter for a plurality of pixel elements 29 included in a plurality of panels 200, and then individually calculate the fourth energization parameter only for pixel elements whose fifth luminance falls outside the predetermined luminance range, thereby simplifying the calculation of energization parameters necessary for luminance correction of a plurality of pixel elements 29. Note that it is preferable to calculate one fifth energization parameter for each panel 200, but it is also possible to calculate a plurality of fifth energization parameters for each panel 200.

[0151] In the above description, the calculation of the fourth energization parameter, which is the energization parameter of the first green main current to be passed through the green light-emitting element 22 included in the first pixel element, has been described as the third modified example, but a similar process can be performed to calculate the energization parameter of the first red main current to be passed through the red light-emitting element 23 of the first pixel element. That is, in the red energization parameter calculation step (S900), a uniform energization parameter may be calculated based on the measured third chromaticities, third luminances, fourth chromaticities, and fourth luminances, and then the energization parameter of the first red main current to be passed through the red light-emitting element 23 may be calculated individually for pixel elements 29 outside the predetermined luminance range.

[0152] <Fourth Modification of First Embodiment> Fig. 22 is a cross-sectional view showing a display device according to this modification. As shown in Fig. 22, a display device 1d according to this modification does not include a first light adjustment member 61. Instead, a covering member 71 has light absorption properties and realizes the function of the first light adjustment member 61. In this modification, if there is excess space in the wiring region 14, dummy wiring having a shape similar to that of the second conductive portion 32 can be provided in this excess space to reduce brightness unevenness. Other configurations, operations, and effects of this modification are the same as those of the first embodiment.

[0153] In the display device 1d, the covering member 71 may be formed from a light-transmitting material, and the first conductive portion 31, the second conductive portion 32, etc. may be formed from a light-transmitting conductive material such as ITO. This makes it possible to impart light transmissivity to the entire display device 1d. As a result, a user of the display device 1d can view the image displayed by the display device 1d and also view what is on the other side of the display device 1d.

[0154] <Fifth Modification of First Embodiment> Fig. 23 is a partially enlarged plan view showing a display device according to this modification, and Fig. 24 is a cross-sectional view taken along line XXIV-XXIV shown in Fig. 23.

[0155] 23 and 24 , a display device 1e according to this modification is provided with reflective members 75 that cover each of the light-emitting elements 20. In the display device 1e, a plurality of openings 61e are provided in the first light adjustment member 61, and one light-emitting element 20 and one reflective member 75 are arranged in each opening 61e. The reflective members 75 are arranged between the light-emitting element 20 and the first light adjustment member 61, and between the light-emitting element 20 and the covering member 71. Note that the reflective members 75 may be arranged to cover the plurality of light-emitting elements 20.

[0156] The reflective member 75 is formed of a material having light reflectivity and insulating properties, such as a white resin material. In plan view, the reflective member 75 may or may not overlap the via 31 a of the first conductive portion 31.

[0157] According to this modification, the provision of the reflective member 75 improves the light extraction efficiency. Furthermore, since the incidence of light emitted from the light emitting element 20 on the covering member 71 can be reduced, for example, it is no longer necessary to impart light-reflecting properties to the material of the covering member 71 in order to improve the light extraction efficiency. This increases the options for the covering member 71. For example, the covering member 71 may be formed from a transparent resin. Other configurations, operations, and effects of this modification are the same as those of the first embodiment.

[0158] In addition, when pixel elements consisting of blue light-emitting elements, green light-emitting elements, and red light-emitting elements are arranged within the opening of the first light adjustment member 61, multiple reflective members 75 may be arranged to cover each of the blue light-emitting elements, green light-emitting elements, and red light-emitting elements located within the opening, or one reflective member 75 may be arranged to cover the blue light-emitting elements, green light-emitting elements, and red light-emitting elements together.

[0159] Second Embodiment Fig. 25 is a cross-sectional view showing a display device according to this embodiment. As shown in Fig. 25, a display device 2 according to this embodiment includes, in addition to the configuration of the display device 1 according to the first embodiment, a wavelength conversion member 76, a color filter substrate 77, and color filters 78R, 78G, and 78B. In addition, in the display device 2, all of the light-emitting elements 20 are blue light-emitting elements 21 that emit blue light.

[0160] The wavelength conversion member 76 contains a phosphor and converts the blue light emitted from the blue light-emitting element 21 into green light and red light. The color filter substrate 77 is a light-transmitting substrate. The color filter 78R is a filter that transmits red light, the color filter 78G is a filter that transmits green light, and the color filter 78B is a filter that transmits blue light. In the display device 2, the first light adjustment member 61 is disposed in a position surrounding the color filters 78R, 78G, and 78B. The first light adjustment member 61 and the color filters 78R, 78G, and 78B form a color filter layer 79.

[0161] In the display device 2, a color filter substrate 77, a color filter layer 79, a wavelength conversion member 76, a first support member 10, a plurality of blue light-emitting elements 21, a covering member 71, and a protective member 74 are laminated in this order from the −Z direction side to the +Z direction side. Note that the first conductive portion 31, the second conductive portion 32, the third conductive portion 33, and the fourth conductive portion 34 are not shown in FIG.

[0162] In this embodiment, a portion of the blue light emitted from the blue light-emitting element 21 located on the +Z direction side of the color filter 78G is converted to green light by the wavelength conversion member 76, which then passes through the color filter 78G and the color filter substrate 77 to be emitted from the display device 2. Also, a portion of the blue light emitted from the blue light-emitting element 21 located on the +Z direction side of the color filter 78R is converted to red light by the wavelength conversion member 76, which then passes through the color filter 78R and the color filter substrate 77 to be emitted from the display device 2. Also, a portion of the blue light emitted from the blue light-emitting element 21 located on the +Z direction side of the color filter 78B remains blue and exits the wavelength conversion member 76, passes through the color filter 78B and the color filter substrate 77, and is emitted from the display device 2. According to this embodiment, a color image can be displayed using a single type of light-emitting element. Other configurations, operations, and effects of this embodiment are similar to those of the first embodiment.

[0163] Third Embodiment Fig. 26 is a plan view showing a display device according to this embodiment. Fig. 27 is a diagram showing the operation of the display device according to this embodiment. In Fig. 27, the same reference numerals are assigned to image data that are input at the same timing. Specifically, the reference numerals "A", "B", "C", ... "P" are assigned in order of earliest input timing.

[0164] 26 and 27 , in the display device 4 according to this embodiment, a plurality of panels 200 are connected in a daisy chain. That is, image data D1 is input only to the control unit 51 of the first-stage panel 200. The conversion unit 51c of the control unit 51 of the first-stage panel 200 converts the image data D1 into image data D2 and inputs it to 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 that was previously stored to the memory cell one stage later, and outputs the image data D2 that was stored in the memory cell of the final stage to the control unit 51 of the second-stage panel 200.

[0165] In the control unit 51 of the second or subsequent panel 200, when image data D2 is input from the previous panel 200, the control unit 51 inputs the image data D2 to the first-stage 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-stage memory cell to the control unit 51 of the next-stage panel 200. In this way, the image data input to the first-stage panel 200 is sent to the subsequent panels 200 in sequence.

[0166] 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 4 displays an image.

[0167] 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 4 can be reduced. Other configurations, operations, and effects of this embodiment are the same as those of the first embodiment.

[0168] <Fourth Embodiment> Fig. 28 is a plan view showing a display device according to this embodiment. In a display device 5 according to this embodiment, all of the panels 200 are configured as high-resolution panels 200a. However, the control unit 51 of each panel 200 displays images at a resolution required for the respective 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 pixel elements 29 in that panel 200 may not be used.

[0169] 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.

[0170] 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 instead of the display device 1 according to the first embodiment, a display device according to any of the modifications of the first embodiment or any of the second to fourth embodiments may be used. Fig. 29 is a diagram showing the inside of a transportation vehicle according to this embodiment. Fig. 30 is a diagram showing an image displayed by the display device according to this embodiment.

[0171] As shown in Fig. 29 , a transportation vehicle 500 according to this embodiment is, for example, an automobile. The transportation vehicle 500 may be an automobile capable of automatic driving. A steering wheel 501 is provided in the driver's seat of the transportation vehicle 500. A main display 502 is provided on the passenger 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.

[0172] 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, a light-transmitting display device as described in the third modified example of the first embodiment is embedded in the lower part of the windshield 505 as the display device.

[0173] 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.

[0174] As shown in Fig. 30, 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.

[0175] The high-resolution area Ra displays, for example, text information or a portion of a map. In the example shown in FIG. 30, information about the next intersection is displayed. The medium-resolution area Rb displays, for example, numbers. In the example shown in FIG. 30, 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. 30, the remaining battery level, whether or not there are incoming emails, and whether or not there are incoming phone calls are displayed.

[0176] 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.

[0177] 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.

[0178] 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.

[0179] <First Modification of the Fifth Embodiment> Figure 31 is a diagram showing the rear of a traffic vehicle according to this modification. As shown in Figure 31, a traffic vehicle 500a according to this modification uses a display device 1 in the lower part of a rear shield 507 and in a brake lamp 508. The rear shield 507 may be provided with a light-transmitting display device as described in the third modification of the first embodiment. An image IM2 containing 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 lamp 508 displays a gauge indicating the amount of brake depression.

[0180] 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. This makes 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.

[0181] 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 pressure applied. 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 fifth embodiment.

[0182] <Second Modification of Fifth Embodiment> Fig. 32 is a diagram showing the front of a traffic vehicle according to this modification, and Fig. 33 is a cross-sectional view showing the windshield of the traffic vehicle according to this modification.

[0183] As shown in Fig. 32, 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 around the traffic vehicle 500b.

[0184] As shown in FIG. 33 , a base material 510 is provided in the front shield 505 of a traffic vehicle 500b. An exterior display device 1g is provided on the exterior side of the traffic vehicle 500b, as viewed from the base material 510, and a cover layer 511 is provided on the exterior side of the display device 1g. An interior display device 1h is provided on the interior side of the traffic vehicle 500b, as viewed from the base material 510, and a cover layer 512 is provided on the interior side of the display device 1h. The base material 510 is a plate material that can be switched between a transparent state and an opaque state, and is formed, for example, from an electrochromic material. It is preferable to use a light-transmitting display device as described in the third modification of the first embodiment for the display devices 1g and 1h. The cover layers 511 and 512 are made of a light-transmitting material, for example, a glass plate.

[0185] 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. 30 may be displayed at the bottom of the in-vehicle display device 1h.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] The present invention includes the following aspects: (Supplementary Note 1) A display device comprising: a plurality of pixel elements each composed of a plurality of light-emitting elements; and a control unit that controls current supply to each of the plurality of light-emitting elements, wherein each of the plurality of pixel elements includes a green light-emitting element and a red light-emitting element, the green light-emitting element outputs green light having a peak wavelength within a range of 500 nm to 560 nm, and the red light-emitting element outputs red light having a peak wavelength within a range of 600 nm to 780 nm, and the control unit, when passing a first green main current through the green light-emitting element included in a first pixel element that is one of the plurality of pixel elements, passes a first green secondary current smaller than the first green main current through the red light-emitting element included in the first pixel element, in order to output green light of desired chromaticity from the first pixel element. (Supplementary Note 2) The display device according to Supplementary Note 1, wherein the control unit, when passing a first red main current through the red light emitting element included in the first pixel element, passes a first red secondary current smaller than the first red main current through the green light emitting element included in the first pixel element, in order to output red light of a desired chromaticity from the first pixel element. (Supplementary Note 3) The display device according to Supplementary Note 1 or 2, wherein a magnitude of the first green main current is 10 times or more a magnitude of the first green secondary current. (Supplementary Note 4) The display device according to any one of Supplementary Notes 1 to 3, wherein each of the plurality of pixel elements further includes a blue light emitting element, the blue light emitting element outputs blue light having a peak wavelength falling within a range of 430 nm to 480 nm, and the plurality of pixel elements output light of a chromaticity that is included in 85 percent or more of an sRGB color gamut area on a CIE chromaticity diagram. (Supplementary Note 5) The display device according to any one of Supplementary Notes 1 to 4, wherein the control unit flows a green secondary current through the red light emitting element included in each of the plurality of pixel elements in order to output green light of a desired chromaticity from the plurality of pixel elements, and at least half of the plurality of green secondary currents have the same value.(Supplementary Note 6) The display device according to Supplementary Note 2, further comprising: a storage unit that stores current flow parameters for controlling current flow to each of the plurality of light-emitting elements, the storage unit storing: a first current flow parameter for causing the first green secondary current to flow through the red light-emitting element included in the first pixel element; and a second current flow parameter for causing the first red secondary current to flow through the green light-emitting element included in the first pixel element. (Supplementary Note 7) The display device according to any one of Supplementary Notes 1 to 6, further comprising: a first support member on which some of the plurality of pixel elements are placed; and a second support member on which other parts of the plurality of pixel elements are placed. (Supplementary Note 8) The display device according to Supplementary Note 7, wherein the first support member and the second support member are arranged along a first direction, and the control unit flows a second green main current through the green light-emitting element included in a second pixel element, which is one of the pixel elements placed at a position closest to the second support member in the first direction, in order to output a desired chromaticity from the second pixel element, and flows a third green main current through the green light-emitting element included in the third pixel element, which is one of the plurality of pixel elements different from the second pixel element, in order to output a desired chromaticity from the third pixel element, and the second green main current is larger than the third green main current.(Supplementary Note 9) A method for manufacturing a display device, comprising: preparing a display device having a plurality of light-emitting elements, the plurality of pixel elements including a green light-emitting element that outputs green light having a peak wavelength within a range of 500 nm to 560 nm, and a red light-emitting element that outputs red light having a peak wavelength within a range of 600 nm to 780 nm, the pixel elements being constituted by the plurality of light-emitting elements; a control unit that controls energization of the plurality of light-emitting elements; and a storage unit that stores energization parameters for controlling the energization; measuring a first chromaticity of green light output from the green light-emitting element included in a first pixel element, which is one of the pixel elements, when a measurement green main current is passed through the green light-emitting element included in the first pixel element; calculating a first energization parameter for passing a first green secondary current through the red light-emitting element included in the first pixel element, based on the measured first chromaticity, in order to output green light of a desired chromaticity from the first pixel element; and storing the calculated first energization parameter in the storage unit. (Supplementary Note 10) The manufacturing method according to Supplementary Note 9 further includes: measuring a second chromaticity of red light output from the red light emitting element included in the first pixel element when a measurement red main current is passed through the red light emitting element included in the first pixel element; calculating, based on the measured second chromaticity, a second current flow parameter for passing a first red secondary current through the green light emitting element included in the first pixel element in order to output red light of a desired chromaticity from the first pixel element; and storing the calculated second current parameter in the memory unit.(Supplementary Note 11) The manufacturing method according to Supplementary Note 9 or 10, wherein calculating the first energization parameter includes: measuring a plurality of third chromaticities of green light output from a plurality of the green light-emitting elements when the measurement green main current is passed through the green light-emitting elements included in each of the plurality of pixel elements; calculating, based on the measured third chromaticities, one third energization parameter for passing a temporary green secondary current through a plurality of the red light-emitting elements so as to output desired green light from at least some of the plurality of pixel elements; passing the measurement green main current through the green light-emitting elements included in the first pixel elements, and measuring a fourth chromaticity obtained by passing the temporary green secondary current based on the third energization parameter through the red light-emitting elements included in the first pixel elements; and setting the third energization parameter as the first energization parameter if the fourth chromaticity is within a predetermined color gamut range, and calculating the first energization parameter based on the fourth chromaticity if the fourth chromaticity is outside the predetermined color gamut range. (Supplementary Note 12) The manufacturing method according to Supplementary Note 11, wherein, in a CIE chromaticity diagram, a difference between X1, which is the X value of the first chromaticity, and X2, which is the X value of the fourth chromaticity, is greater than a difference between X2 and X3, which is the X value of the chromaticity when the first green secondary current based on the first energizing parameters calculated on the basis of the fourth chromaticity is caused to flow. (Supplementary Note 13) The manufacturing method according to Supplementary Note 11 or 12, wherein, in a CIE chromaticity diagram, a difference between Y1, which is the Y value of the first chromaticity, and Y2, which is the Y value of the fourth chromaticity, is greater than a difference between Y2 and Y3, which is the Y value of the chromaticity when the first green secondary current based on the first energizing parameters calculated on the basis of the fourth chromaticity is caused to flow.(Supplementary Note 14) The manufacturing method according to any one of Supplementary Notes 10 to 13, further comprising: measuring a first luminance of light output from the green light emitting element included in the first pixel element when the measurement green main current is passed through the green light emitting element included in the first pixel element; measuring a second luminance of light output from the red light emitting element included in the first pixel element when the measurement red main current is passed through the red light emitting element included in the first pixel element; calculating a fourth current flow parameter regarding a magnitude of a current to be passed through the green light emitting element to output green light of desired luminance and chromaticity, based on the first luminance, the second luminance, and the first chromaticity; and storing the calculated fourth current flow parameter in the storage unit. (Supplementary Note 15) Calculating the fourth energization parameter includes: measuring a third chromaticity and a third luminance of green light output from each of the plurality of green light-emitting elements when the measurement green main current is passed through the green light-emitting element included in each of the plurality of pixel elements; and measuring a fourth chromaticity and a fourth luminance of red light output from each of the plurality of red light-emitting elements when the measurement red main current is passed through the red light-emitting element included in each of the plurality of pixel elements; and calculating, based on the measured third chromaticities, the measured third luminances, the measured fourth chromaticities, and the measured fourth luminances, one fifth energization parameter for passing a provisional green main current through the plurality of green light-emitting elements to output desired green light from at least some of the plurality of pixel elements, and one sixth energization parameter for passing a provisional green secondary current through the plurality of red light-emitting elements to output desired red light from at least some of the plurality of pixel elements, measuring a fifth luminance when the provisional green main current is passed through the green light-emitting element included in the first pixel element and the provisional green secondary current is passed through the red light-emitting element included in the first pixel element; and if the fifth luminance is within a predetermined threshold range, setting the fifth energization parameter to the fourth energization parameter, and if the fifth luminance is outside the predetermined threshold range, calculating the fourth energization parameter based on the fifth luminance.

[0190] The present invention can be used, for example, in a display device for a transportation vehicle.

[0191] 1: Display device 2: Display device 4: Display device 5: Display device 10: First support member 11: Image forming area 12: Wiring connection area 13: Element area 14: Wiring area 15: Second support member 20: Light emitting element 21: Blue light emitting element 22: Green light emitting element 23: Red light emitting element 24: Fourth light emitting element 29: Pixel element 31: First conductive portion 31a: Via 32: Second conductive portion 33: Third conductive portion 34: Fourth conductive portion 35: Fifth conductive portion 51: Control unit 51c: Conversion unit 51d: Memory unit 51d1: Green correction database 51d2: Red correction database 51e: Current output unit 61: First light adjustment member 71: Covering member 72: Anisotropic connection member 73 : Connecting member 74 : Protective member 75 : Reflective member 76 : Wavelength conversion member 77 : Color filter substrate 79 : Color filter layer 100 : Mounting substrate 200 : Panel 300 : Flexible wiring 301 : Insulating base 302 : Wiring 400 : External memory 500 : Transportation vehicle 501 : Steering wheel 502 : Main display 503 : Control button 504 : Sub-display 505 : Front shield 507 : Rear shield 508 : Brake lamp 510 : Base material 511 : Cover layer 512 : Cover layer

Claims

1. A display device comprising: a plurality of pixel elements each composed of a plurality of light-emitting elements; and a control unit that controls the supply of current to each of the plurality of light-emitting elements, wherein each of the plurality of pixel elements includes a green light-emitting element and a red light-emitting element, the green light-emitting element outputs green light having a peak wavelength within the range of 500 nm to 560 nm, and the red light-emitting element outputs red light having a peak wavelength within the range of 600 nm to 780 nm, and when the control unit passes a first green main current through the green light-emitting element included in a first pixel element that is one of the plurality of pixel elements, the control unit passes a first green secondary current that is smaller than the first green main current through the red light-emitting element included in the first pixel element, in order to output green light of a desired chromaticity from the first pixel element.

2. The display device according to claim 1, wherein when the control unit passes a first red main current through the red light emitting element included in the first pixel element, the control unit passes a first red sub-current, which is smaller than the first red main current, through the green light emitting element included in the first pixel element, in order to output red light of a desired chromaticity from the first pixel element.

3. The display device according to claim 1 or 2, wherein the magnitude of said first green main current is 10 times or more the magnitude of said first green secondary current.

4. A display device according to any one of claims 1 to 3, wherein each of the plurality of pixel elements further includes a blue light-emitting element, the blue light-emitting element outputs blue light having a peak wavelength within the range of 430 nm to 480 nm, and the plurality of pixel elements output light of a chromaticity that is encompassed within an area of 85 percent or more of the sRGB color gamut on the CIE chromaticity diagram.

5. The display device according to any one of claims 1 to 4, wherein the control unit causes a green secondary current to flow through the red light emitting element included in each of the plurality of pixel elements in order to output green light of a desired chromaticity from the plurality of pixel elements, and more than half of the plurality of green secondary currents have the same value.

6. The display device according to claim 2, further comprising a memory unit that stores current flow parameters for controlling current flow to each of the plurality of light-emitting elements, and the memory unit stores: a first current flow parameter for flowing the first green secondary current through the red light-emitting element included in the first pixel element; and a second current flow parameter for flowing the first red secondary current through the green light-emitting element included in the first pixel element.

7. A display device according to any one of claims 1 to 6, further comprising: a first support member on which some of the plurality of pixel elements are placed; and a second support member on which other parts of the plurality of pixel elements are placed.

8. The display device of claim 7, wherein the first support member and the second support member are arranged along a first direction, and the control unit flows a second green main current through the green light-emitting element included in a second pixel element, which is one of the pixel elements placed at a position closest to the second support member in the first direction, in order to output a desired chromaticity from the second pixel element, and flows a third green main current through the green light-emitting element included in the third pixel element, which is one of the plurality of pixel elements different from the second pixel element, in order to output a desired chromaticity from the third pixel element, and the second green main current is larger than the third green main current.

9. A method for manufacturing a display device, comprising: preparing a display device having a plurality of light-emitting elements, including a green light-emitting element that outputs green light having a peak wavelength within the range of 500 nm to 560 nm, and a red light-emitting element that outputs red light having a peak wavelength within the range of 600 nm to 780 nm, the display device including a plurality of pixel elements constituted by the plurality of light-emitting elements; a control unit that controls the supply of current to each of the plurality of light-emitting elements; and a memory unit that stores a current-supply parameter for controlling the supply of current; measuring a first chromaticity of green light output from the green light-emitting element included in a first pixel element, which is one of the pixel elements, when a measurement green main current is passed through the green light-emitting element included in the first pixel element; calculating a first current-supply parameter for passing a first green secondary current through the red light-emitting element included in the first pixel element based on the measured first chromaticity, in order to output green light of a desired chromaticity from the first pixel element; and storing the calculated first current-supply parameter in the memory unit.

10. The manufacturing method according to claim 9, further comprising: measuring a second chromaticity of red light output from the red light-emitting element included in the first pixel element when a measurement red main current is passed through the red light-emitting element included in the first pixel element; calculating, based on the measured second chromaticity, a second current-carrying parameter for passing a first red secondary current through the green light-emitting element included in the first pixel element in order to output red light of a desired chromaticity from the first pixel element; and storing the calculated second current-carrying parameter in the memory unit.

11. The manufacturing method according to claim 9 or 10, wherein calculating the first energization parameter comprises: measuring a plurality of third chromaticities of green light output from a plurality of the green light-emitting elements when the measurement green main current is passed through the green light-emitting elements included in each of the plurality of pixel elements; calculating, based on the measured third chromaticities, one third energization parameter for passing a provisional green secondary current through a plurality of the red light-emitting elements so as to output desired green light from at least some of the plurality of pixel elements; passing the measurement green main current through the green light-emitting elements included in the first pixel elements and measuring a fourth chromaticity obtained by passing the provisional green secondary current based on the third energization parameter through the red light-emitting elements included in the first pixel elements; and if the fourth chromaticity is within a predetermined color gamut range, setting the third energization parameter to the first energization parameter, and if the fourth chromaticity is outside the predetermined color gamut range, calculating the first energization parameter based on the fourth chromaticity.

12. The manufacturing method according to claim 11, wherein, in the CIE chromaticity diagram, a difference between X1, which is the X value of the first chromaticity, and X2, which is the X value of the fourth chromaticity, is greater than a difference between X2 and X3, which is the X value of the chromaticity when the first green secondary current based on the first current-flow parameter calculated on the basis of the fourth chromaticity is passed.

13. A manufacturing method according to claim 11 or 12, wherein, in the CIE chromaticity diagram, the difference between Y1, which is the Y value of the first chromaticity, and Y2, which is the Y value of the fourth chromaticity, is greater than the difference between Y2 and Y3, which is the Y value of the chromaticity when the first green secondary current based on the first current flow parameter calculated on the basis of the fourth chromaticity is passed.

14. The manufacturing method according to any one of claims 10 to 13, further comprising: measuring a first luminance of light output from the green light-emitting element included in the first pixel element when the measurement green main current is passed through the green light-emitting element included in the first pixel element; measuring a second luminance of light output from the red light-emitting element included in the first pixel element when the measurement red main current is passed through the red light-emitting element included in the first pixel element; calculating a fourth current-carrying parameter regarding the magnitude of a current to be passed through the green light-emitting element to output green light of desired luminance and chromaticity, based on the first luminance, the second luminance, and the first chromaticity; and storing the calculated fourth current-carrying parameter in the memory unit.

15. Calculating the fourth energization parameter includes: measuring a third chromaticity and a third luminance of green light output from each of the plurality of green light-emitting elements when the measurement green main current is passed through the green light-emitting element included in each of the plurality of pixel elements; measuring a fourth chromaticity and a fourth luminance of red light output from each of the plurality of red light-emitting elements when the measurement red main current is passed through the red light-emitting element included in each of the plurality of pixel elements; and calculating, based on the measured third chromaticities, third luminances, fourth chromaticities, and fourth luminances, one fifth energization parameter for passing a provisional green main current through the plurality of green light-emitting elements to output desired green light from at least some of the plurality of pixel elements, and one sixth energization parameter for passing a provisional green secondary current through the plurality of red light-emitting elements to output desired red light from at least some of the plurality of pixel elements.

15. The manufacturing method according to claim 14, further comprising: measuring a fifth luminance when the provisional green main current is passed through the green light-emitting element included in the first pixel element and the provisional green secondary current is passed through the red light-emitting element included in the first pixel element; and when the fifth luminance is within a predetermined threshold range, setting the fifth energization parameter to the fourth energization parameter; and when the fifth luminance is outside the predetermined threshold range, calculating the fourth energization parameter based on the fifth luminance.

Images