Display device, electronic apparatus, and method for manufacturing display device

Abstract

Provided are a display device, an electronic apparatus, and a method of manufacturing the display device capable of suppressing an increase in the number of manufacturing steps and improving the luminous efficiency of sub-pixels. The display device includes a first sub-pixel, a second sub-pixel, and a third sub-pixel as sub-pixels, and a light emitting element having an organic layer is formed in each of the sub-pixels. The first sub-pixel has a first light-emitting element as the light-emitting element. The first light-emitting element has a first organic layer as an organic layer, and includes a protective layer covering at least the first light-emitting element. In the protective layer, first and second openings are formed as openings at portions corresponding to the second and third sub-pixels, respectively, and opening shapes of the first and second openings are different from each other.

Description

Technical Field

[0001] The present disclosure relates to a display device, an electronic device, and a method for manufacturing a display device. Background Art

[0002] In a display device using an organic electroluminescence (EL) element having a light-emitting layer, a display device having a plurality of sub-pixels corresponding to a plurality of color types is also required to miniaturize the pitch of the sub-pixels. In order to achieve a fine pitch of sub-pixels in a display device, Patent Document 1 discloses a technique in which a structure in which a plurality of light-emitting layers corresponding to a plurality of color types are laminated is formed on a plurality of sub-pixels. In addition, Patent Document 2 discloses a technique in which an organic EL element of each color type is formed by performing a vapor deposition process and a process of a light-emitting layer or the like on the sub-pixels of each color type.

[0003] Citation List

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2013-258022

[0006] Patent Document 2: WO 2020 / 004086 A Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] The technique disclosed in Patent Document 1 has room for improvement in improving the light-emitting efficiency of sub-pixels. The technique disclosed in Patent Document 2 has room for improvement in suppressing an increase in the number of manufacturing processes.

[0009] In view of the above points, the present disclosure is made, and an object of the present disclosure is to provide a display device, an electronic device, and a method for manufacturing a display device that can suppress an increase in the number of manufacturing processes and improve the light-emitting efficiency of sub-pixels.

[0010] Solution to the Problem

[0011] The present disclosure is, for example, (1) a display device including:

[0012] a first sub-pixel, a second sub-pixel, and a third sub-pixel as sub-pixels, wherein

[0013] a light-emitting element including an organic layer is formed in each sub-pixel,

[0014] the first sub-pixel includes a first light-emitting element as the light-emitting element, and the first light-emitting element includes a first organic layer as the organic layer,

[0015] the display device further includes: a protective layer that covers at least the first light-emitting element,

[0016] In the protective layer, a first opening and a second opening are formed as openings in portions corresponding to the second sub-pixel and the third sub-pixel, respectively, and

[0017] the first opening and the second opening have different opening shapes.

[0018] The present disclosure may be (2) an electronic device including the display device according to the above (1).

[0019] Furthermore, the present disclosure is (3) a method of manufacturing a display device, the method including:

[0020] forming a first light-emitting element having a first organic layer at a position corresponding to a first sub-pixel;

[0021] forming a protective layer covering the first light-emitting element;

[0022] forming a first opening and a second opening at positions corresponding to the second sub-pixel and the third sub-pixel in the protective layer to have different opening shapes from each other; and

[0023] forming a second organic layer in portions corresponding to the first opening and the second opening, the second organic layer forming a second light-emitting element and a third light-emitting element corresponding to the second sub-pixel and the third sub-pixel, respectively, and having a common material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A of is a plan view for explaining an example of a display device according to a first embodiment. Figure 1 B of schematically shows an enlarged Figure 1 state of a portion XS1 of the region surrounded by a dashed line in A of.

[0025] Figure 2 is a cross-sectional view for explaining an example of a display device according to a first embodiment.

[0026] Figure 3 A of schematically shows a state of a longitudinal cross-section taken along line A-A in B of. Figure 1 is a cross-sectional view showing a state of a longitudinal cross-section taken along line A-A in B of. Figure 3 B of schematically shows a state of a vertical cross-section taken along line B-B in B of. Figure 1 is a cross-sectional view showing a state of a vertical cross-section taken along line B-B in B of.

[0027] Figure 4 A of and Figure 4 B of are plan views for explaining an example of a display device according to a first embodiment. Figure 4 C of is a cross-sectional view for explaining an example of an auxiliary electrode provided in an outer region of a display area.

[0028] Figure 5 A to Figure 5 C of [device name] is a cross-sectional view of an organic layer in an example illustrating a display device according to the first embodiment.

[0029] Figure 6 A to Figure 6 D of [device name] is a diagram for explaining an example of a manufacturing method of a display device according to the first embodiment.

[0030] Figure 7 A to Figure 7 C of [device name] is a diagram for explaining an example of a method of manufacturing a display device according to the first embodiment.

[0031] Figure 8 A of [device name] is a diagram for explaining an example of a manufacturing line used in the manufacturing method of a display device according to the first embodiment. Figure 8 B of [device name] schematically shows Figure 8 a state in which a region XS2 portion in A of [device name] is enlarged.

[0032] Figure 9 A to Figure 9 F of [device name] is a diagram for illustrating an example of a sub-pixel of a display device according to a first modification of the first embodiment.

[0033] Figure 10 A to Figure 10 C of [device name] is a cross-sectional view for illustrating an example of a display device according to a second modification of the first embodiment.

[0034] Figure 11 A to Figure 11 D of [device name] is a cross-sectional view for illustrating an example of a display device according to a third modification of the first embodiment.

[0035] Figure 12 A and Figure 12 B of [device name] is a cross-sectional view for illustrating an example of a display device according to a fourth modification of the first embodiment. Figure 12 C of [device name] is a cross-sectional view for explaining an example of a display device according to a fifth modification of the first embodiment.

[0036] Figure 13 A to Figure 13 C of [device name] is a cross-sectional view for illustrating an example of a display device according to a sixth modification of the first embodiment.

[0037] Figure 14 A and Figure 14 B of [device name] is a cross-sectional view for illustrating an example of a display device according to a seventh modification of the first embodiment.

[0038] Figure 15 A and Figure 15 B of [description] is a cross-sectional view showing an example of a display device according to an eighth modification of the first embodiment.

[0039] Figure 16 A of [description] is a cross-sectional view showing an example of a display device according to a seventh modification of the first embodiment. Figure 16 B of [description] is a cross-sectional view showing an example of a display device according to a ninth modification of the first embodiment.

[0040] Figure 17 A and Figure 17 B of [description] is a cross-sectional view of an organic layer in an example of a display device according to a tenth modification of the first embodiment.

[0041] Figure 18 A and Figure 18 B of [description] is a cross-sectional view of an organic layer in an embodiment of a display device according to an eleventh modification of the first embodiment.

[0042] Figure 19 is a cross-sectional view showing an example of a display device according to a twelfth modification of the first embodiment.

[0043] Figure 20A is a cross-sectional view showing an example of a display device according to a thirteenth modification of the first embodiment.

[0044] Figure 20B is a cross-sectional view showing an example of a display device according to a thirteenth modification of the first embodiment.

[0045] Figure 20C is a cross-sectional view explaining an example of a display device according to a thirteenth modification of the first embodiment.

[0046] Figure 20D is a cross-sectional view explaining an example of a display device according to a thirteenth modification of the first embodiment.

[0047] Figure 21A is a cross-sectional view showing an example of a display device according to a fourteenth modification of the first embodiment.

[0048] Figure 21B is a cross-sectional view showing an example of a display device according to a fourteenth modification of the first embodiment.

[0049] Figure 21C is a cross-sectional view explaining an example of a display device according to a fourteenth modification of the first embodiment.

[0050] Figure 21D is a cross-sectional view showing an example of a display device according to the fourteenth modification of the first embodiment.

[0051] Figure 21E is a cross-sectional view showing an example of a display device according to the fourteenth modification of the first embodiment.

[0052] Figure 22A is a cross-sectional view showing an example of a display device according to the fifteenth modification of the first embodiment.

[0053] Figure 22B is a cross-sectional view showing an example of a display device according to the fifteenth modification of the first embodiment.

[0054] Figure 22C is a cross-sectional view showing an example of a display device according to the fifteenth modification of the first embodiment.

[0055] Figure 23 from A to Figure 23 F of is a diagram showing the layout of sub-pixels in an example of the display device according to the first embodiment.

[0056] Figure 24 from A to Figure 24 F of is a cross-sectional view showing an example of the display device according to the first modification of the first embodiment.

[0057] Figure 25 from A to Figure 25 C of is a plan view for explaining an example of a display device according to the twelfth modification of the first embodiment.

[0058] Figure 26 is a cross-sectional view showing an example of the display device according to the twelfth modification of the first embodiment.

[0059] Figure 27 is a cross-sectional view showing an example of the display device according to the second embodiment.

[0060] Figure 28 A and Figure 28 B of is a plan view for explaining an example of the display device according to the second embodiment.

[0061] Figure 29 A and Figure 29 B of is a cross-sectional view for explaining an example of the manufacturing method of the display device according to the second embodiment.

[0062] Figure 30 A and Figure 30 B of is a cross-sectional view for explaining an example of the manufacturing method of the display device according to the second embodiment.

[0063] Figure 31 is a cross-sectional view for explaining an example of a display device according to the second embodiment.

[0064] Figure 32 A in is a cross-sectional view for explaining an example of a display device according to the third embodiment. Figure 32 B in schematically shows Figure 32 a plan view of a state in which a region XS3 portion surrounded by a dotted line in A of is magnified.

[0065] Figure 33 is a diagram of sub-pixels in an example of a display device according to a first modification of the third embodiment.

[0066] Figure 34 A in is a cross-sectional view for explaining an example of a display device according to a modification of the third embodiment. Figure 34 B in is a plan view for explaining an example of an annular lens.

[0067] Figure 35 A in and Figure 35 B in are cross-sectional views for explaining a second organic layer used in an example of a display device according to the fourth embodiment.

[0068] Figure 36 A in and Figure 36 B in are cross-sectional views for explaining a second organic layer used in an example of a display device according to the fourth embodiment.

[0069] Figure 37 A in and Figure 37 B in are diagrams for explaining an example of a display device having a resonator structure.

[0070] Figure 38 A in and Figure 38 B in are diagrams for explaining an example of a display device having a resonator structure.

[0071] Figure 39 A in and Figure 39 B in are diagrams for explaining an example of a display device having a resonator structure.

[0072] Figure 40 is a diagram for explaining an example of a display device having a resonator structure.

[0073] Figure 41 A in, Figure 41 B in and Figure 41 C in are diagrams for explaining an example of a case where a display device includes a wavelength selection unit.

[0074] Figure 42This is a diagram showing an example of a display device including a wavelength selection unit.

[0075] Figure 43 A of Figure 43 B of is a diagram for explaining an example of a display device including a wavelength selection unit.

[0076] Figure 44 This is a diagram showing an example of a display device including a wavelength selection unit.

[0077] Figure 45 A of Figure 45 B of is a diagram showing an application example of a display device.

[0078] Figure 46 This is a diagram for explaining an application example of a display device.

[0079] Figure 47 This is a diagram for explaining an application example of a display device.

[0080] Figure 48 This is a diagram for explaining an application example of a display device.

[0081] Figure 49 This is a diagram showing an application example of a display device.

[0082] Figure 50 A of Figure 50 B of is a diagram showing an application example of a display device. Detailed implementation

[0083] Hereinafter, examples according to the present disclosure will be described with reference to the drawings. Note that the description will be given in the following order. In this specification and the drawings, configurations having substantially the same functional configuration are denoted by the same reference numerals, and redundant descriptions are omitted.

[0084] Note that the description will be given in the following order.

[0085] 1. First embodiment

[0086] 2. Second embodiment

[0087] 3. Third embodiment

[0088] 4. Fourth embodiment

[0089] 5. Example of a case where the display device has a resonator structure

[0090] 6. Example of the positional relationship in the case where the display device includes a wavelength selection unit

[0091] 7. Application example

[0092] The following description is a preferred specific embodiment of the present disclosure, and the content of the present disclosure is not limited to these embodiments, etc. In addition, in the following description, the front-back direction, left-right direction, up-down direction, etc. are indicated for the convenience of description, but the content of the present disclosure is not limited to these directions. In Figure 1 and Figure 2 's examples, it is assumed that the Z-axis direction is the up-down direction (the upper side is in the +Z direction, and the lower side is in the -Z direction), the X-axis direction is the left-right direction (the right side is in the +X direction, and the left side is in the -X direction), the Y-axis direction is the front-back direction (the rear side is in the +Y direction, and the front side is in the -Y direction), and the description will be based on this. Similarity applies to the description of any one or more of the X-axis, Y-axis, and Z-axis in Figures 3 to 36 . For convenience, the relative dimensional ratios of the dimensions and thicknesses of each layer shown in each figure of Figure 1 are shown, and no actual dimensional ratio is limited. Regarding the definitions of these directions and dimensional ratios, similarity applies to each figure of Figures 2 to 36 .

[0093] [1 First Embodiment]

[0094] [1-1 Configuration of the Device]

[0095] The display device 10 according to the first embodiment of the present disclosure includes a plurality of pixels arranged two-dimensionally. In the display device 10, one pixel may be formed by a combination of a plurality of sub-pixels 101. Hereinafter, the case where one pixel is formed by a combination of a plurality of sub-pixels corresponding to multiple color types in the display device 10 will be described as an example. It should be noted that in this case, the plurality of sub-pixels 101 are arranged two-dimensionally in the display device 10.

[0096] An example of the display device according to the first embodiment of the present disclosure includes an organic electroluminescence (EL) display device. In the display device according to the first embodiment, as shown in Figure 1 's A, Figure 1 's B, Figure 2 etc., the case where the display device is an organic EL display device (hereinafter, simply referred to as "display device 10") will be described as an example. Figure 1 's A is a plan view showing an example of the display device 10. Figure 1 's B schematically shows Figure 1 's A in a state where the XS1 region part is enlarged. Figure 2 is a cross-sectional view showing an example of the display device 10.

[0097] In the following description, a case where the display device 10 performs display by a top emission method is described as an example. It is assumed that the top emission method means a method in which the light-emitting element 104 is arranged on one side of the display surface DP instead of on the die of the substrate 11A. Therefore, in the display device 10, the substrate 11A is located on the rear surface side of the display device 10, and the direction from the substrate 11A toward the light-emitting element 104 (the +Z direction), which will be described later, is the direction toward the front surface side (the upper surface side) of the display device 10. In the display device 10, the light generated from the light-emitting element 104 is directed in the +Z direction and emitted to the outside. In the following description, in each layer constituting the display device 10, the surface on the display surface DP side in the display area (display area 10A) formed by the display area forming unit 110 of the display device 10 is referred to as the first surface (the upper surface), and the surface on the rear surface side of the display device 10 is referred to as the second surface (the lower surface). It should be noted that this does not prohibit the case where the display device 10 according to the present disclosure is a bottom emission type. The display device 10 is also applicable to the bottom emission type. In the bottom emission type, the light generated from the light-emitting element 104 is directed in the -Z direction and emitted to the outside. Further, the area outside the display area 10A on the surface on the display surface DP side may be referred to as the external area 10B.

[0098] Details such as the type of sub-pixels, the configuration of sub-pixels, and the configuration of each layer formed in each sub-pixel will be further described.

[0099] (Type of sub-pixels)

[0100] The display device 10 includes at least a first sub-pixel, a second sub-pixel, and a third sub-pixel as sub-pixels. In Figure 1 , Figure 2 and other examples, the first sub-pixel, the second sub-pixel, and the third sub-pixel are defined as sub-pixels having different color types as emission colors. In Figure 1 A of Figure 1 B of Figure 2 and other examples, three colors of green, red, and blue are defined as multiple color types corresponding to the emission colors of the display device 10. In Figure 1 and Figure 2 and other examples, three types of sub-pixels 101G, sub-pixel 101R, and sub-pixel 101B are respectively set as the first sub-pixel, the second sub-pixel, and the third sub-pixel. The sub-pixel 101R, the sub-pixel 101G, and the sub-pixel 101B are a red sub-pixel, a green sub-pixel, and a blue sub-pixel, respectively, and display red, green, and blue, respectively. However, Figure 1 and Figure 2The example is only an example, and the display device 10 is not limited to the case where a plurality of sub-pixels corresponding to three color types are included. In addition, the wavelengths of light corresponding to each color type of red, green and blue can be defined as wavelengths in the range of 610nm to 650nm (red wavelength band), the range of 510nm to 590nm (green wavelength band) and the range of 440nm to 480nm (blue wavelength band), respectively. Note that the number of color types of sub-pixels is not limited to the three colors shown here, and may be four colors, etc. In addition, the color types of sub-pixels are not limited to red, green and blue, and may be yellow, white, etc. Even in the case where the color types of sub-pixels are three types of red, green and blue, the first sub-pixel, the second sub-pixel and the third sub-pixel are not limited to the case of sub-pixel 101G, sub-pixel 101R and sub-pixel 101B. For example, the first sub-pixel, the second sub-pixel and the third sub-pixel may be sub-pixel 101G, sub-pixel 101B and sub-pixel 101R, respectively, or may be sub-pixel 101B, sub-pixel 101G and sub-pixel 101R, respectively.

[0101] In addition, the layout of the sub-pixels 101B, 101R, and 101G in the display device 10 is not particularly limited, but Figure 1 A. Figure 1 B. Figure 2 In the example of FIG. 1 , sub-pixels 101B, 101R, and 101G constituting one pixel are arranged in a predetermined area constituting the display surface DP, and each pixel is arranged two-dimensionally. Figure 1 In the display device 10 shown in the example of B, a plurality of sub-pixels 101B, 101R, and 101G corresponding to a plurality of color types are arranged in a two-dimensional and triangular layout. Figure 23 E. Figure 23 As shown in F, except Figure 1 In addition to B, the △-shaped layout represents a layout in which a triangle is formed by line segments connecting the centers of the plurality of sub-pixels 101 constituting a pixel. Note that Figure 1 B. Figure 23 E and Figure 23 F is an example, and as will be described later, the layout of the sub-pixels 101B, 101R, and 101G is not limited in the present disclosure. Figure 1 A and Figure 1 FIG. 1B is a diagram for explaining an example of a display area 10A and a sub-pixel 101 of the display device 10. Figure 1 In FIG. 1A , the display area 10A is shown as a shaded area. Figure 23 E and Figure 23 F is a diagram showing an example of the layout of the sub-pixel 101. Figure 23 In E, the sub-pixel 101 is formed in a hexagonal shape, andFigure 23 In F, the sub-pixel 101 is formed in a circular shape, but these shapes are examples of the shape of the sub-pixel 101.

[0102] In the description of this specification, without particularly distinguishing the types of the sub-pixels 101R, 101G, and 101B, the sub-pixels 101R, 101G, and 101B are collectively referred to as the sub-pixel 101.

[0103] (Drive of sub-pixel)

[0104] As Figure 1 shown in A of, the display device 10 generally includes a control circuit 107, an H driver 105, and a V driver 106, and the control circuit 107 controls the driving of the H driver 105 and the V driver 106. In the case where a two-dimensional matrix is assigned to each sub-pixel 101, the H driver 105 and the V driver 106 control the driving of the sub-pixel 101 in units of columns and rows, respectively.

[0105] (Configuration of sub-pixel)

[0106] In Figure 2 the example of, in the display device 10, the sub-pixel 101 includes a light-emitting element 104 having an organic layer 14. In Figure 2 the example of, the display device 10 includes a light-emitting element 104 on the upper side of the driving substrate 11. Here, as will be described later, the light-emitting element 104 has a structure in which a first electrode 13, an organic layer 14, and a second electrode 15 are sequentially stacked on the upper side of the driving substrate 11 from the side closer to the driving substrate 11.

[0107] Next, each configuration of the driving substrate and the like will be described.

[0108] (Driving substrate)

[0109] As Figure 2 shown, in the driving substrate 11, an insulating layer 11B is provided on the substrate 11A, and various circuits for driving a plurality of light-emitting elements 104 are provided in the insulating layer 11B. Examples of the various circuits include a driving circuit for controlling the light-emitting element 104 and a power supply circuit for supplying power to the plurality of light-emitting elements 104 (both are not shown in the drawings). The various circuits are restricted from being exposed to the outside by the insulating layer 11B. In addition, the driving substrate 11 is provided with wirings for connecting the light-emitting element 104, the circuits provided on the substrate 11A, and the like to the first electrode 13 and the like. Examples of the wirings include a plurality of contact plugs.

[0110] The substrate 11A may include, for example, glass or resin having low moisture permeability and oxygen permeability, or may include a semiconductor in which it is easy to form transistors and the like. Specifically, the substrate 11A may be a glass substrate, a semiconductor substrate, a resin substrate, or the like.

[0111] (Insulating layer)

[0112] The insulating layer 11B is formed of, for example, an organic material or an inorganic material. The organic material includes, for example, at least one material of polyimide or acrylic resin. The inorganic material includes at least one material of, for example, silicon oxide, silicon nitride, silicon oxynitride, or aluminum oxide.

[0113] (Light-emitting element)

[0114] A plurality of light-emitting elements 104 are provided on the first surface side of the driving substrate 11. In Figure 1 example A, Figure 1 example B, Figure 2 etc., the light-emitting element 104 is an organic electroluminescent element (organic EL element). As the plurality of light-emitting elements 104, light-emitting elements are provided that set the color corresponding to the color type of the sub-pixel 101 as the light emitted from the light-emitting surface (as the emission color). The first sub-pixel includes a first light-emitting element as the light-emitting element. In Figure 1 example A, Figure 1 example B, Figure 2 etc., the second sub-pixel and the third sub-pixel include a second light-emitting element and a third light-emitting element as the light-emitting elements, respectively. For example, the light-emitting elements 104R, 104G, and 104B are formed in the sub-pixels 101R, 101G, and 101B, respectively. In Figure 2 example, the first light-emitting element corresponds to the light-emitting element 104G, and the second light-emitting element and the third light-emitting element correspond to the light-emitting element 104R and the light-emitting element 104B, respectively. The plurality of light-emitting elements 104 are arranged in a layout corresponding to the arrangement of the sub-pixels 101 of the respective color types. The plurality of light-emitting elements 104 are arranged in a two-dimensional layout. Note that in this specification, the term light-emitting element 104 is used without particularly distinguishing the types such as the light-emitting elements 104R, 104G, and 104B.

[0115] The light-emitting element 104 has a laminated structure in which the first electrode 13, the organic layer 14, and the second electrode 15 are laminated in this order. The first electrode 13, the organic layer 14, and the second electrode 15 are laminated in this order from one side of the driving substrate 11 in the direction from the second surface toward the first surface.

[0116] (First electrode)

[0117] A plurality of first electrodes 13 are provided on the first surface side of the driving substrate 11. In Figure 2 example, the first electrode 13 is an anode electrode.

[0118] Each of the first electrodes 13 includes at least one of a metal layer or a metal oxide layer. Each of the first electrodes 13 may include a single-layer film of a metal layer or a metal oxide layer, or a laminated film (multi-layer film) of a metal layer and a metal oxide layer. The thickness of the first electrode 13 is preferably in the range of 100 nm to 300 nm. The first electrode 13 is preferably formed of a light-reflective material.

[0119] The metal layer includes, for example, at least one metal element selected from the group consisting of chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), molybdenum (Mo), titanium (Ti), tantalum (Ta), aluminum (Al), magnesium (Mg), iron (Fe), tungsten (W), and silver (Ag). The metal layer may include at least one of the above metal elements as a constituent element of an alloy. Specific examples of the alloy include aluminum alloy and silver alloy. Specific examples of the aluminum alloy include, for example, AlNd and AlCu.

[0120] The metal oxide layer includes, for example, at least one of a mixture of indium oxide and indium tin oxide (ITO), a mixture of indium oxide and zinc oxide (IZO), or titanium oxide (TiO).

[0121] In addition, the first electrode 13 may have a configuration in which a hole injection material layer of a laminated inorganic material and a reflective layer including a light-reflective material are provided. For example, in the case where the first electrode 13 has a structure in which a first material layer and a second material layer are laminated, the first material layer may include an aluminum alloy, and the second material layer may include an inorganic material such as Ti, TiO, Mo, or MoO3.

[0122] In Figure 2 , for each sub-pixel 101, the first electrode 13 is electrically separated. That is, a plurality of first electrodes 13 are provided on the first surface side of the driving substrate 11 and are provided for each sub-pixel 101.

[0123] (Inter-pixel insulating layer)

[0124] In addition, between adjacent first electrodes 13, a layer having insulating properties (inter-pixel insulating layer 12) is preferably provided. The inter-pixel insulating layer 12 is formed between adjacent first electrodes 13. However, the inter-pixel insulating layer 12 may be a layer formed of the same material as the insulating layer 11B, or may be a layer formed of a material different from the insulating layer 11B. In Figure 2 and the like, the inter-pixel insulating layer 12 electrically insulates each first electrode 13 used for each light-emitting element 104 (that is, for each sub-pixel 101). Moreover, in Figure 2In the inter-pixel insulating layer 12 shown in the example, an opening 12A is formed on the first surface side, the first surface (the surface facing the second electrode 15) of the first electrode 13 is exposed from the opening 12A, and the portion of the first electrode 13 exposed through the opening 12A directly faces the organic layer 14 described later without inserting the insulating layer 11B. It should be noted that in Figure 2 the example, the end edge 26 of the opening 12A is shown in contact with the end edge of the first electrode 13, but this is just an example.

[0125] In the case where the direction along the thickness direction (Z-axis direction) of the light-emitting element 104 is the line-of-sight direction, the portion (the portion where the organic layer 14 and the first electrode 13 directly face each other) of each light-emitting element 104 that designates the first electrode 13 and the organic layer 14 facing each other while avoiding the portion where the insulating layer 11B is inserted (the portion where the first electrode 13 and the organic layer 14 directly face each other) is defined as the light-emitting unit K.

[0126] It should be noted that as Figure 3 in A of Figure 3 and B of Figure 3 in A of Figure 3 and B of Figure 3 shown, the inter-pixel insulating layer 12 can be formed not only between adjacent first electrodes 13 but also formed to straddle the edge portion of the first electrode 13. In Figure 1 the edge portion of the first electrode 13 is defined by the portion from the outer peripheral edge of the first electrode 13 to a predetermined position closer to the center side of the first electrode 13. Also in this case, the inter-pixel insulating layer 12 has an opening 12A, and the first surface of the first electrode 13 is exposed from the opening 12A. Figure 3 Figure A of Figure 1 is a cross-sectional view schematically showing an example of the state of the longitudinal cross-section taken along line A-A in Figure B of Figure 3 Figure B of

[0127] For example, in the case where the thickness direction of the display device 10 is the line-of-sight direction (the Z-axis direction in the example of Figure 2 ), the region where the inter-pixel insulating layer 12 is formed is at least formed in the region corresponding to the subsequent continuous portion 103, and can be formed only locally in the region corresponding to the continuous portion 103.

[0128] (organic layer)

[0129] The organic layer 14 is provided on the first electrode 13. The organic layer 14 is provided at least between the first electrode 13 and the second electrode 15. In Figure 2 In the display device 10 shown in the example of Figure 5 from A to Figure 5 as shown in C of Figure 5 from A to Figure 5 as shown in C of Figure 5 from A to Figure 5 as shown in C of

[0130] In Figure 2 the example of Figure 2 the first organic layer 14A1 is a layer included in the configuration of the light-emitting element 104G and is configured to be able to emit green light. The second organic layer 14A2 is a layer having a common material for the light-emitting elements 104R and 104B (in

[0131] In Figure 2 the example of Figure 5 from A to Figure 5 as shown in C of

[0132] In Figure 2 the example of the first embodiment shown in Figure 1 the first organic layer 14A1 is formed in a layout corresponding to the shape formed by the sub-pixel 101G and the continuous portion 103 as shown in B of Figure 2In the example of , the second organic layer 14A2 extends in the planar direction of the display region 10A and is formed to substantially cover the entire sub-pixel 101.

[0133] (First organic layer)

[0134] As Figure 5 shown in C of , for example, the first organic layer 14A1 has a configuration in which a hole injection layer 140, a hole transport layer 141, a light-emitting layer 142, and an electron transport layer 143 are sequentially laminated from the first electrode 13 toward the second electrode 15A1. An electron injection layer 144 may be provided between the electron transport layer 143 and the second electrode 15. The electron injection layer 144 is used to improve the electron injection efficiency. The electron injection layer 144 includes an element of an alkali metal or an alkaline earth metal or a compound containing the same, for example, lithium (Li), lithium fluoride (LiF), etc. Note that the configuration of the first organic layer 14A1 is not limited to this, and layers other than the light-emitting layer 142 are provided as needed.

[0135] The hole injection layer 140 is a buffer layer for improving the efficiency of hole injection into the light-emitting layer 142 and suppressing leakage. The hole injection layer 140 may include, for example, hexaazatriphenylene (HAT), etc.

[0136] The hole transport layer 141 is used to improve the hole transport efficiency to the light-emitting layer 142. For example, the hole transport layer 141 includes α-NPD [N,N'-bis(1-naphthyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine].

[0137] The electron transport layer 143 is used to enhance the efficiency of electron transport to the light-emitting layer 142. As the electron transport layer 143, for example, BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), Alq3 (aluminum quinolate), Bphen (bathophenanthroline), etc. are used. The electron transport layer includes at least one layer and may include a layer doped with an alkali metal or an alkaline earth metal.

[0138] In the case where the electron transport layer 143 includes a layer doped with an alkali metal or an alkaline earth metal, for example, a host material such as BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), Alq3 (aluminum quinolate), Bphen (bathophenanthroline), etc. is doped by co-evaporation with a dopant material of, for example, 0.5 to 15 wt% of an alkali metal (such as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), or cesium (Cs)) or an alkaline earth metal (such as magnesium (Mg), calcium (Ca), strontium (Sr), or barium (Ba)).

[0139] As Figure 5As shown in C of , the light-emitting layer 142 generates light by recombining electrons (E) and holes (H) by applying an electric field. The light-emitting layer 142 is an organic compound layer containing an organic light-emitting material. In Figure 5 In C of , for ease of description, holes (H) and electrons (E) are schematically shown, and their movement is indicated by arrows. The same applies to Figure 5 A of and Figure 5 B of .

[0140] In Figure 2 In the example of , the light-emitting layer 142 in the first organic layer 14A1 is a green light-emitting layer 142G. In the green light-emitting layer 142G, when an electric field is applied, some holes (H) injected from the first electrode 13 through the hole injection layer 140 and the hole transport layer 141 and some electrons (E) injected from the second electrode 15 through the electron transport layer 143 recombine to generate green light.

[0141] The green light-emitting layer 142G includes, for example, at least one of a green light-emitting material, a hole transport material, an electron transport material, or two charge transport materials. The green light-emitting material can be fluorescent or phosphorescent. Specifically, the green light-emitting layer 142G includes, for example, a mixture of DPVBi and 5 wt% of coumarin 6. Examples of the hole transport material include materials that can be used as the material constituting the hole transport layer 141. Examples of the electron transport material include materials that can be used as the material constituting the electron transport layer 143. Examples of the dual charge transport material include materials having hole transport properties and electron transport properties.

[0142] The optical thickness of the organic layer 14 and the optical thickness of each layer constituting the organic layer 14 are set such that the value at which electrons and holes corresponding to the wavelength associated with the color type of the sub-pixel 101 can move recombines. The thickness of each layer constituting the organic layer 14 is preferably a thickness considering the optical thickness of each layer constituting the organic layer 14. Specifically, the thickness of each layer constituting the organic layer 14 is preferably set in the range of 1 to 20 nm for the hole injection layer 140, 10 to 200 nm for the hole transport layer 141, 5 to 50 nm for the light-emitting layer 142, and 10 to 200 nm for the electron transport layer 143.

[0143] (Second organic layer)

[0144] The second organic layer 14A2 has, for example, a hole injection layer 140, a hole transport layer 141, a light-emitting layer 142 (first light-emitting layer), a light-emission separation layer 145, a light-emitting layer 142 (second light-emitting layer), and an electron transport layer 143 from the first electrode 13 toward the second electrode 15 (in Figure 1In the second electrode 15A2), a laminated configuration is provided in sequence. The electron injection layer 144 may be disposed between the electron transport layer 143 and the second electrode 15A2). The electron injection layer 144 is used to improve the electron injection efficiency, as described in the first organic layer 14A1. Note that the configuration of the second organic layer 14A2 is not limited thereto, and layers other than the plurality of light-emitting layers 142 (the first light-emitting layer and the second light-emitting layer) and the light-emitting separation layer 145 are provided as needed.

[0145] As an example of the layer structure of the second organic layer 14A2, each of the hole injection layer 140, the hole transport layer 141, and the electron transport layer 143 can use layers similar to those of the hole injection layer 140, the hole transport layer 141, and the electron transport layer 143 described in the first organic layer 14A1.

[0146] In Figure 2 In the example, the first light-emitting layer and the second light-emitting layer in the second organic layer 14A2 are layers having different light-emission peak wavelengths, and are a red light-emitting layer 142R and a blue light-emitting layer 142B, respectively, as shown in Figure 5 A of Figure 5 and Figure 5 B of Figure 5 Note that the color types of the first light-emitting layer and the second light-emitting layer are not limited to the examples of

[0147] A of

[0148] and

[0149] B of

[0150] and may be changed according to the color type of the light-emitting element 104. In the red light-emitting layer 142R, when an electric field is applied, some holes (holes) (H) injected from the first electrode 13 through the hole injection layer 140 and the hole transport layer 141 and some electrons (E) injected from the second electrode 15A2 through the electron transport layer 143 recombine to generate red light.

[0148] The red light-emitting layer 142R includes, for example, at least one of a red light-emitting material, a hole transport material, an electron transport material, or two charge transport materials. The red light-emitting material may be fluorescent or phosphorescent. Specifically, the red light-emitting layer 142R includes, for example, a mixture of 4,4-bis(2,2-distyryl)biphenyl (DPVBi) and 30 wt% of 2,6-bis[(4'-methoxy-diphenylamino)-styryl]-1,5-dicyanonaphthalene (BSN).

[0149] In the blue light-emitting layer 142B, when an electric field is applied, some holes (H) injected from the first electrode 13 through the hole injection layer 140, the hole transport layer 141, and the light-emitting separation layer 145 and some electrons (E) injected from the second electrode 15A2 through the electron transport layer 143 recombine to generate blue light.

[0150] The blue light-emitting layer 142B includes, for example, at least one of a blue light-emitting material, a hole transport material, an electron transport material, or two charge transport materials. The blue light-emitting material may be fluorescent or phosphorescent. Specifically, for example, the blue light-emitting layer 142B includes a mixture of DPVBi and 2.5 wt% of 4,4'-bis[2-{4-(N,N-diphenylamino)phenyl}vinyl]biphenyl (DPAVBi).

[0151] The light-emission separation layer 145 is disposed between the first light-emitting layer and the second light-emitting layer and is a layer for adjusting the injection of carriers into the light-emitting layer 142, and adjusts the light-emission balance of each color by injecting electrons or holes into the light-emitting layer 142 via the light-emission separation layer 145. For example, the light-emission separation layer 145 includes 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl derivatives and the like.

[0152] In the light-emission separation layer 145, between the portion corresponding to the second sub-pixel and the portion corresponding to the third sub-pixel, the thickness of the light-emission separation layer 145 is different, and the thickness of the light-emission separation layer 145 formed in the second sub-pixel is formed to be smaller than the thickness of the light-emission separation layer 145 formed in the third sub-pixel. In Figure 2 the example of Figure 5 A of Figure 5 and B of

[0153] The thickness of the light-emission separation layer 145 of the second sub-pixel and the thickness of the light-emission separation layer 145 of the third sub-pixel are preferably set in the range of 0 nm to 20 nm.

[0154] Since the thickness of the light-emission separation layer 145 of the second sub-pixel (sub-pixel 101R) is different from the thickness of the light-emission separation layer 145 of the third sub-pixel (sub-pixel 101B), regarding the light-emission balance between the light emission of the red light-emitting layer 142R (red light emission) and the light emission of the blue light-emitting layer 142B (blue light emission), the light-emission balance of the second sub-pixel can be made different from the light-emission balance of the third sub-pixel. In Figure 2 the example of

[0155] (Second electrode)

[0156] The second electrode 15 is disposed on the upper side of the organic layer 14. The portion of the second electrode 15 corresponding to the sub-pixel 101 (the portion corresponding to the light-emitting element 104) faces the first electrode 13. As the second electrode 15, an electrode (second electrode 15A1) disposed on the upper side of the first organic layer 14A1 and an electrode (second electrode 15A2) disposed on the upper side of the second organic layer 14A2 are provided. The second electrode 15A2 is provided as the electrode for the sub-pixel 101G. The second electrode 15A2 is provided as the electrode shared by the sub-pixels 101R and 101B. Note that, in the description of this specification, without particularly distinguishing the types of the second electrode 15A1 and the second electrode 15A2, the second electrode 15A1 and the second electrode 15A2 are collectively referred to as the second electrode 15.

[0157] As Figure 4 shown in A of, the second electrode 15A1 is connected between adjacent sub-pixels 101G and extends along the arrangement direction of the sub-pixels 101G. In addition, as Figure 4 shown in B of, the second electrode 15A2 extends in the plane direction of the display region 10A and is formed to substantially cover the entire sub-pixel 101. Figure 4 A and 4B of are diagrams for explaining the formation regions of the second electrodes 15A1 and 15A2. In Figure 4 A of and Figure 4 B of, the hatched regions represent the formation regions of the second electrodes 15A1 and 15A2. It should be noted that, in Figure 4 A of and Figure 4 B of, for ease of description, each of the sub-pixels 101B, 101R, and 101G is formed in a rectangular shape, and the layout of the sub-pixels 101 is in a lattice shape.

[0158] The second electrode 15 is a cathode electrode. The second electrode 15 is preferably a transparent electrode that is transparent to the light generated in the organic layer 14. The transparent electrode referred to herein includes a transparent electrode including a transparent conductive layer and a transparent electrode having a structure including a transparent conductive layer and a semi-transmissive reflective layer.

[0159] The thickness of the second electrode 15 is not particularly limited, but is preferably set in the range of 3 nm to 500 nm. It should be noted that, in the case where the second electrode 15 is a transparent conductive layer, for example, in the case where the second electrode 15 includes indium zinc oxide (IZO), the thickness of the second electrode 15 can be set in the range of, for example, 10 nm to 500 nm.

[0160] As the second electrode 15, a material having excellent optical transparency and a small work function is preferably used. In addition, the second electrode 15 may include a metal layer, for example. For example, the second electrode 15 includes a metal layer such as IZO, magnesium (Mg), silver (Ag), their alloys, etc. In addition, the second electrode 15 may be a multilayer film. For example, in the case where the second electrode 15 is a film in which a second layer is laminated on a first layer, a metal layer such as calcium (Ca), barium (Ba), lithium (Li), lithium fluoride (LiF), cesium (Cs), indium (In), magnesium (Mg), silver (Ag), their alloys, etc. may be used as the first layer, and a metal layer such as magnesium (Mg), silver (Ag), their alloys, etc. may be used as the second layer. In addition, the multilayer film of the second electrode 15 may include the same kind of material. For example, the first layer and the second layer may be alloy metal layers of magnesium (Mg) and silver (Ag) laminated at different concentrations. For example, the Ag concentration of the first layer (lower layer) may be set to be low, while the Ag concentration of the second layer (upper layer) may be set to be high. Since the second electrode 15 is a multilayer film as in the above examples, the light extraction efficiency can be improved while improving the electron injection performance.

[0161] (Protective layer)

[0162] The protective layer 16 is formed to cover the first surface of the light-emitting element 104. The protective layer 16 makes it difficult for the first surface of the light-emitting element 104 to come into contact with external air, and suppresses moisture from penetrating into the light-emitting element 104 from the external environment.

[0163] In Figure 2 the example of, a first protective layer 16A1 and a second protective layer 16A2 are provided as the protective layer 16.

[0164] (First protective layer)

[0165] The first protective layer 16A1 covers the first light-emitting element ( Figure 2 the sub-pixel 101G in the example of). The first protective layer 16A1 includes an upper surface protective layer 17 covering the upper surface of the second electrode 15A1 and an end surface protective layer 18. The end surface protective layer 18 covers the first surface of the upper surface protective layer 17 and the end surface 20G (side wall) of the first light-emitting element ( Figure 1 the light-emitting element 104G in the example of). The end surface protective layer 18 covers the corresponding end surfaces 20R and 20B of the second light-emitting element ( Figure 2 the light-emitting element 104R in the example of) and the third light-emitting element ( Figure 2 the light-emitting element 104B in the example of).

[0166] As the material of the first protective layer 16A1, a material having low permeability and low water permeability is preferably used for both the upper surface protective layer 17 and the end surface protective layer 18. The thickness of the first protective layer 16A1 is preferably 1 μm to 5 μm.

[0167] In addition, regarding the material of the first protective layer 16A1, the upper surface protective layer 17 and the end surface protective layer 18 both include an insulating material. Examples of the insulating material include silicon nitride (SiNx), silicon oxide (SiOx), aluminum oxide (AlOx), titanium oxide (TiOx), or a combination thereof. In addition, a thermosetting resin or the like can be used as the insulating material. Examples of the upper surface protective layer 17 and the end surface protective layer 18 include a CVD film containing SiO, SiON, etc., an ALD film containing AlO, TiO, SiO, etc. Note that the CVD film refers to a film formed by chemical vapor deposition. The ALD film refers to a film formed by atomic layer deposition. The upper surface protective layer 17 and the end surface protective layer 18 can be formed as a single layer or can have a structure in which a plurality of layers are laminated. For example, the upper surface protective layer 17 and the end surface protective layer 18 can have a structure in which a CVD film and an ALD film are laminated.

[0168] (Opening)

[0169] The first protective layer 16A1 has openings, and in Figure 2 the example, a first opening 19A and a second opening 19B are formed as the openings. The first opening 19A and the second opening 19B are respectively formed in portions corresponding to the sub-pixel 101R and the sub-pixel 101B. In this specification, when the first opening 19A and the second opening 19B are not particularly distinguished, they are simply collectively referred to as openings.

[0170] In the display device 10, the first protective layer 16A1 has different opening shapes of the first opening 19A and the second opening 19B. In Figure 2 the example, in the end surface protective layer 18 of the light-emitting element 104G formed in the sub-pixel 101G, the first opening 19A and the second opening 19B are respectively formed at positions corresponding to the sub-pixel 101R and the sub-pixel 101B. The description that the opening shapes of the first opening 19A and the second opening 19B are different from each other means that the contour shapes of the first opening 19A and the second opening 19B do not match each other, and includes the case where the contour shapes of the first opening 19A and the second opening 19B are similar to each other.

[0171] In Figure 2 the example, the opening width WA of the first opening 19A and the opening width WB of the second opening 19B formed in the end surface protective layer 18 of the first light-emitting element are different from each other, and the opening width WA of the first opening 19A is smaller than the opening width WB of the second opening 19B (narrower than the opening width WB of the second opening 19B).

[0172] The sizes of the opening width WA of the first opening 19A and the opening width WB of the second opening 19B only need to be determined according to the color type of the sub-pixel 101 or the layer configuration of the light-emitting element 104, and are not particularly limited, but are preferably set in the range of about 1 μm to 10 μm. Without particularly distinguishing between the first opening 19A and the second opening 19B, they are collectively referred to as openings. In addition, without particularly distinguishing between the opening width WA of the first opening 19A and the opening width WB of the second opening 19B, they are collectively referred to as the opening width of the opening.

[0173] Note that the opening width of the opening represents the interval distance between the end edges on the first surface side of the opening in the cross-section of the protective layer 16. In Figure 1 the example of, in the sub-pixel 101R, the opening width WA of the first opening 19A is set to a value greater than the width of the light-emitting unit K, which is the region where the first electrode 13 and the organic layer 14 face each other (the region of the opening 12A forming the pixel isolation layer 12). In the sub-pixel 101B, similar to the sub-pixel 101R, the opening width WB of the second opening 19B is set to a value greater than the width of the light-emitting unit K.

[0174] (Second protective layer)

[0175] The second protective layer 16A2 preferably covers the entire area of the display region 10A. The thickness of the second protective layer 16A2 is formed to be about 0.5 μm to 8 μm.

[0176] Examples of the material of the second protective layer 16A2 include materials having low permeability and low water permeability, and examples thereof include materials similar to the material of the first protective layer 16A1.

[0177] (Continuous part)

[0178] Adjacent first sub-pixels ( Figure 2 the sub-pixel 101G in Figure 1 of B, Figure 3is connected to the continuous portion 103 shown in B etc. The continuous portion 103 has a structure in which the first organic layer 14A1 and the second electrode 15A1 are laminated. In the display device 10, the second electrode 15A1 provided in the sub-pixel 101G is connected to the second electrode 15A1 of the continuous portion 103 so that the second electrodes 15A1 of adjacent sub-pixels 101G are electrically connected to each other. In addition, the first organic layer 14A1 provided in the sub-pixel 101G is also connected to the first organic layer 14A1 of the continuous portion 103 so that the first organic layers 14A1 of adjacent sub-pixels 101G are electrically connected to each other. Since the continuous portion 103 is formed in this way, a state can be formed in which the laminated structures of the second electrodes and the first organic layers formed in the plurality of first light-emitting elements are connected to each other. Then, when the auxiliary electrode 21 described later is provided outside the display area 10A, by connecting the second electrode 15A1 to the auxiliary electrode 21, the energization of the sub-pixels 101 in the display area 10A can be easily controlled.

[0179] (Auxiliary electrode)

[0180] Outside the display area 10A, as Figure 4 shown in C of, the auxiliary electrode 21 is preferably provided on the driving substrate 11, and the second electrode 15A1 and the second electrode 15A2 are preferably connected to the auxiliary electrode 21. The second electrode 15 connected to the auxiliary electrode 21 can be electrically connected to the potential supply wiring 22 formed on the driving substrate 11 side via the auxiliary electrode 21 or the like. The auxiliary electrode 21 is preferably configured to be electrically connectable to the outside via the potential supply line 22 or the like or directly. The auxiliary electrode 21 may include a material similar to that of the first electrode 13 or the like. Figure 4 Figure C of shows an example of a connection structure between the auxiliary electrode 21 outside the display area 10A and the second electrode 15. Note that, for ease of description, the second electrode 15, the auxiliary electrode 21, and the potential supply wiring 22 are represented by the same hatching.

[0181] (Sealing resin layer)

[0182] In Figure 2 the example of, the sealing resin layer 23 is formed on the first surface side of the second protective layer 16A2. The sealing resin layer 23 has a function as an adhesive layer for adhering the opposing substrate 24 described later. Examples of the sealing resin layer 23 may include an ultraviolet curable resin, a thermosetting resin, and the like.

[0183] (Opposing substrate)

[0184] A counter substrate 24 may be provided on the first surface side of the sealing resin layer 23. As the material of the counter substrate 24, the material of the substrate 11A of the driving substrate 11 or the like may be used. For example, a glass substrate may be used as the counter substrate 24. The material of the glass substrate is not particularly limited as long as the glass substrate is formed of a material that transmits light emitted from the organic layer 14. Examples of the material of the glass substrate include various glass substrates (such as high strain point glass, soda glass, borosilicate glass, and lead glass), quartz substrates, and the like.

[0185] [1-2 Manufacturing method]

[0186] The manufacturing method of the display device 10 according to the first embodiment includes a process of forming a first light-emitting element having a first organic layer at a position corresponding to the first sub-pixel, and a process of forming a protective layer covering the first light-emitting element. Moreover, the method further includes a process of forming a first opening and a second opening in the protective layer at positions corresponding to the second sub-pixel and the third sub-pixel to have different opening shapes from each other. The method further includes a process of forming a second organic layer in portions corresponding to the first opening and the second opening, and the second organic layer forms second and third light-emitting elements corresponding to the second sub-pixel and the third sub-pixel respectively and having a common material.

[0187] Next, an example of the manufacturing method of the display device 10 according to the first embodiment will be described. The manufacturing method can be carried out as follows, for example. First, for example, transistors, wiring layers required for driving the sub-pixels 101, and the insulating layer 11B are formed on a substrate 11A including a semiconductor material such as silicon. The wiring layer is provided with wirings, vias, etc. For example, the wirings can be formed by a lithography technique using a material such as aluminum (Al), and the vias can be formed using a material such as tungsten (W).

[0188] The first electrode 13 is formed on the driving substrate 11, and the wiring layer, the insulating layer 11B, etc. are formed on the driving substrate 11. The first electrode 13 is formed by patterning using a sputtering method or the like.

[0189] An insulating material layer is completely formed over the entire region of the first surface including the first electrode 13 on the first surface side of the driving substrate 11. The material of the insulating material layer is an insulating material that constitutes the inter-pixel insulating portion. The insulating material layer is, for example, a SiNx film or the like.

[0190] The insulating material layer is patterned using a patterning technique such as lithography or etching to form an opening 12A corresponding to the sub-pixel 101, and the upper surface of the first electrode is exposed from the opening 12A. Thus, as Figure 6 shown in A, the inter-pixel insulating layer 12 and the first electrode 13 can be formed on the driving substrate 11.

[0191] A first organic layer 14A1 is formed over the entire area on the first surface side to cover the inter-pixel insulating layer 12 and the first electrode 13. The first organic layer 14A1 is formed by a hole injection layer 140, a hole transport layer 141, a light-emitting layer 142, an electron transport layer 143, and an electron injection layer 144 in this order. As a method for forming each of the hole injection layer 140, the hole transport layer 141, the light-emitting layer 142, the electron transport layer 143, and the electron injection layer 144, for example, a vapor deposition method can be used.

[0192] A second electrode 15A1 is formed over the entire exposed surface side (first surface side) of the first organic layer 14A1 by a sputtering method or the like to cover the first organic layer 14A1. Examples of the second electrode 15A1 include an IZO film formed by a sputtering method. As Figure 6 shown in B of, an upper surface protective layer 17 is formed over the entire exposed surface (the surface on the +Z direction side) of the second electrode 15A1. Examples of the upper surface protective layer 17 include a SiN film formed by a CVD method.

[0193] The laminated structure of the first organic layer 14A1, the second electrode 15A1, and the upper surface protective layer 17 is processed by a dry etching method according to the layout of the first sub-pixel, and a part of the first organic layer 14A1, the second electrode 15A1, and the upper surface protective layer 17 is removed so that the part corresponding to the first sub-pixel (sub-pixel 101G) and the part corresponding to the continuous part 103 are retained. At this time, as Figure 6 shown in C of, a first light-emitting element (light-emitting element 104G) is formed.

[0194] Next, as Figure 6 shown in D of, an end face protective layer 18 is formed to cover the end face 20G of the light-emitting element 104G (the end face of the laminated structure of the first organic layer 14A1, the second electrode 15A1, and the upper surface protective layer 17) and the upper surface protective layer 17 over its entire surface. Examples of the end face protective layer 18 include a SiN film formed by a CVD method. The end face protective layer 18 and the upper surface protective layer 17 form a first protective layer 16A1.

[0195] In the end face protective layer 18, as Figure 7 shown in A of, a first opening 19A and a second opening 19B are formed as openings in the part corresponding to the second sub-pixel and the third sub-pixel (sub-pixel 101R and sub-pixel 101B). For example, the first opening 19A and the second opening 19B can be formed by applying a dry etching method to the end face protective layer 18 to have the opening widths of the first opening 19A and the second opening 19B.

[0196] In addition, a second organic layer 14A2 of the light-emitting element 104 corresponding to the second sub-pixel and the third sub-pixel is formed as follows in a portion corresponding to the first opening 19A and the second opening 19B.

[0197] The first electrode 13 is exposed at the positions of the first opening 19A and the second opening 19B. As Figure 7 shown in B of, the second organic layer 14A2 is formed so as to cover the first electrode 13 and the first protective layer 16A1 on one of its surfaces. The second organic layer 14A2 is sequentially formed of a hole injection layer 140, a hole transport layer 141, a first light-emitting layer (red light-emitting layer 142R), a light-emission separation layer 145, a second light-emitting layer (blue light-emitting layer 142B), an electron transport layer 143, and an electron injection layer 144. The second organic layer 14A2 is formed on the entire surface on the first surface side of the first protective layer 16A1 and on the entire surface of the first electrode 13 exposed from the first opening 19A and the second opening 19B.

[0198] Examples of the formation method of each layer for forming the second organic layer 14A2 include a vapor deposition method. For example, the method of forming the second organic layer 14A2 by a vapor deposition method can be performed in the production line 120 shown in A of Figure 8 . In the production line 120, a vapor deposition source 121 and a mask 122 corresponding to each layer constituting the second organic layer 14A2 are arranged. Figure 8 The thick arrow F in A of indicates the transfer method of the substrate BAM to be deposited. As Figure 8 shown in A and 8B of, in a state where the substrate BAM is arranged such that the first electrode 13 and the first protective layer face the vapor deposition source 121 side, the deposition materials X1 to X6 are sequentially scattered from the vapor deposition source 121 to the substrate BAM, whereby each layer for forming the second organic layer 14A2 can be sequentially formed on the first electrode 13 and the first protective layer by a vapor deposition method. Figure 8 B of is a cross-sectional view schematically showing a magnified state of a region XS2 surrounded by a dashed line in A of Figure 8 . Note that, in the example of A of Figure 8 , the vapor deposition material X1 is a material for forming the hole injection layer 140, the vapor deposition material X2 is a material for forming the hole transport layer 141, the vapor deposition material X3 is a material for forming the red light-emitting layer 142R, the vapor deposition material X4 is a material for forming the light-emission separation layer 145, the vapor deposition material X5 is a material for forming the blue light-emitting layer 142B, and the vapor deposition material X6 is a material for forming the electron transport layer 143. Note that, in A of Figure 8 , for ease of description, the vapor deposition source 121 and the mask 122 for forming the electron injection layer 144 are not shown.

[0199] When forming the light-emitting separation layer 145 by vapor deposition, vapor deposition is performed while changing the film formation width. The film formation width when forming the light-emitting separation layer 145 by vapor deposition is greater than the film formation width when forming each layer (such as the hole injection layer 140) other than the light-emitting separation layer 145 that constitutes the second organic layer 14A2 by vapor deposition. In Figure 8 In the manufacturing line 120 shown in A of, regarding the opening width of the restriction plate 122 provided in the vapor deposition source 121 for forming each layer, the opening width of the restriction plate 122 corresponding to the vapor deposition source 121 when forming the light-emitting separation layer 145 by vapor deposition is greater than the opening width of the restriction plate 122 corresponding to the vapor deposition source 121 when forming each layer (such as the hole injection layer 140) other than the light-emitting separation layer 145 that constitutes the second organic layer 14A2 by vapor deposition. Therefore, when forming each layer (such as the hole injection layer 140) other than the light-emitting separation layer 145 that constitutes the second organic layer 14A2 by vapor deposition, vapor deposition with high directivity is performed, and thus, even if the first opening 19A and the second opening 19B are different from each other, the hole injection layers 140 of the light-emitting element 104R and the hole injection layer 140 of the light-emitting element 104B are not likely to have different thicknesses.

[0200] When forming the light-emitting separation layer 145 that constitutes the second organic layer 14A2 by vapor deposition, vapor deposition with reduced directivity is performed, and thus the difference between the first opening 19A and the second opening 19B allows the thickness of the light-emitting separation layer 145 to effectively vary according to the sub-pixel 101. Specifically, as Figure 7 shown in B of, in the case where the opening width of the second opening 19B is greater than the opening width of the first opening 19A, the thickness of the light-emitting separation layer 145 of the light-emitting element 104B corresponding to the sub-pixel 101B can be made greater than the thickness of the light-emitting separation layer 145 of the light-emitting element 104R corresponding to the sub-pixel 101R.

[0201] As Figure 7 shown in C of, the second electrode 15A2 is formed on the first surface side of the second organic layer 14A2. As the second electrode 15A2, an IZO film or the like is used. The second electrode 15A2 can be formed by a sputtering method or the like. The second electrode 15A2 can be used as a common cathode electrode for the sub-pixel 101R and the sub-pixel 101B.

[0202] A second protective layer 16A2 is formed on the first surface side of the second electrode 15A2. Examples of the second protective layer 16A2 include a SiN film or the like. The second protective layer 16A2 can be formed using a CVD method or the like.

[0203] The opposing substrate 24 is disposed on the first surface side of the second protective layer 16A2 with the sealing resin layer 23 therebetween. The sealing resin layer 23 can bond the second protective layer 16A2 to the opposing substrate 24. Thus, the display device 10 can be obtained.

[0204] Note that the manufacturing method described herein is an example, and the manufacturing method of the display device 10 is not limited thereto.

[0205] [1-3 Functions and Effects]

[0206] In a conventional display device, a technique is known in which a structure in which a plurality of light-emitting layers corresponding to sub-pixels of each color type are laminated over a plurality of sub-pixels is formed such that the combination of light-emitting layers forming the organic layer is shared by the plurality of sub-pixels. In this case, each sub-pixel needs to extract light corresponding to the color type of the sub-pixel from the light generated by the light-emitting element having the organic layer, and remove light other than the light corresponding to the color type of the sub-pixel. Therefore, in the existing display device, there is room for improvement in improving the light-emitting efficiency.

[0207] In the display device 10 according to the first embodiment, the opening widths of the first opening 19A and the second opening 19B are different from each other, and thus the states of the light-emission separation layers 145 of the plurality of sub-pixels (second sub-pixels and third sub-pixels) having a common combination of the light-emitting layers 142 can be made different. For example, in the example of the first embodiment shown in Figure 2 , the thicknesses of the light-emission separation layers 145 are different, and the thickness of the light-emission separation layer 145 in the sub-pixel 101R (second sub-pixel) is smaller than the thickness of the light-emission separation layer 145 in the sub-pixel 101B (third sub-pixel). Therefore, regarding the light-emission balance between the red light emission (light emission in the red light-emitting layer 142R) and the blue light emission (light emission in the blue light-emitting layer 142B) in the second organic layer 14A2, the light-emission balance in the second sub-pixel is different from the light-emission balance in the third sub-pixel. As shown in A of Figure 5 , in the sub-pixel 101B, the collision between holes (H) and electrons (E) may occur in the second light-emitting layer (blue light-emitting layer) located on the second electrode 15A2 side, and the light generated in the light-emitting element 104B has strong blue. As shown in B of Figure 5 , in the sub-pixel 101R, the collision between holes (H) and electrons (E) may occur in the first light-emitting layer (red light-emitting layer) located on the first electrode 13 side, and the light generated in the light-emitting element 104R has strong red.

[0208] In addition, in the display device 10 according to the first embodiment, as also described in the above manufacturing method, the combination of the light-emitting layers 142 is common in the light-emitting elements 104 in the sub-pixels 101 corresponding to at least two color types, different from the method of forming the light-emitting elements 104 separately for each color type of the sub-pixels 101, and thus the number of manufacturing processes can also be suppressed.

[0209] As described above, in the display device 10 according to the first embodiment, an increase in the number of manufacturing processes can be suppressed and the light-emitting efficiency of the sub-pixels can be improved.

[0210] [1-4 Modification Examples]

[0211] (First Modification Example)

[0212] In the display device 10 according to the first embodiment, the layout and shape of the sub-pixels 101B, 101R, and 101G are not limited to Figure 1 A of Figure 1 B of Figure 2 and the example shown in Figure 23 A to Figure 23 D of Figure 9 As shown in A to Figure 9 F of Figure 23 the layout of the sub-pixels 101B, 101R, and 101G can be different from the triangular layout, and as shown in A to Figure 23 F of Figure 9 the sub-pixels 101B, 101R, and 101G can have a shape different from the hexagonal shape. This form is called the first modification example of the first embodiment. Figure 9 A to F of

[0213] Figure 23 is a diagram showing an example of the layout of the sub-pixels 101. Figure 23 A to Figure 23 F of Figure 23 is a diagram showing an example of the shape of the sub-pixels 101. Figure 23 E of Figure 23 and F of

[0214] In addition, in the display device 10 according to the first embodiment, in Figure 2In the example, regarding the size of the sub-pixel 101, the size of the region where the first electrode 13 and the organic layer 14 face each other directly (the region of the light-emitting unit K) is smaller than the size of the opening of the first protective layer. This is one example, and the dimensional relationship between the size of the sub-pixel 101 and the sizes of the first opening and the second opening is not limited. The size of the region where the first electrode 13 and the organic layer 14 face each other directly (the region of the light-emitting unit K) (the size of the sub-pixel 101) may match the sizes of the first opening 19A and the second opening 19B. In addition, as Figure 24 from A to Figure 24 shown in F of Figure 24 from A to Figure 24 shown in F of Figure 24 from A to Figure 24 shown in F of Figure 24 from A to Figure 24 In the example shown in C of Figure 24 shown in D of Figure 24 from E to Figure 24 shown in F of

[0215] In the display device 10 according to the first modification of the first embodiment, the shapes of the sub-pixels 101B, 101R, and 101G are not limited to hexagons. In addition to the rectangular chamfered shape, circular shape, and annular shape shown in Figure 9 from A to Figure 9 shown in C of Figure 9 from D to Figure 9The shapes of the S-shaped, U-shaped, and L-shaped bent portions shown in F. It should be noted that the shapes of the sub-pixels 101B, 101R, and 101G correspond to the regions where the first electrode 13 and the organic layer 14 face each other directly (the regions of the light-emitting units K). Note that, in the case where the sub-pixel 101B has a shape with a bent portion such as an S shape, a U shape, or an L shape, the opening width WK of the region of the light-emitting unit K represents the width in the direction orthogonal to the direction in which the S shape, U shape, or L shape extends.

[0216] (Second modification example)

[0217] In the display device 10 according to the first embodiment, in Figure 2 the example, the shape of the first electrode 13 is a shape in which the cross-section of the first electrode 13 is a non-tapered rectangular shape, but this shape is not limited thereto, and the shape of the first electrode 13 can be as Figure 10 A in Figure 10 B in Figure 10 C in Figure 10 A in Figure 10 B in Figure 10 C in Figure 10 A in Figure 10 B in Figure 10 C in Figure 11 A to Figure 11 D in Figure 12 A to Figure 12 C in

[0218] In the display device 10 according to the second modification example of the first embodiment, the first electrode 13 can be formed into a shape in which its end portion 13A has an inclined surface ( Figure 10 A in Figure 10 B in Figure 10 A in Figure 10 B in

[0219] As Figure 10As shown in C of FIG. 0, a recessed portion 25 can be formed in the first electrode 13. In the display device 10 according to the second modification of the first embodiment, the dug-out portion 25 is formed in the first electrode 13 so that a reduction in luminous efficiency and abnormal light emission due to current leakage in a portion of the organic layer 14 near the end edge of the opening 12A of the pixel inter-insulation layer 12 can be suppressed.

[0220] (Modification 3)

[0221] In the display device 10 according to the first embodiment, in Figure 1[[END In the example of FIG., the contour portion (end edge 26) of the opening 12A formed in the pixel inter-insulation layer 12 is formed to be non-tapered, but the present invention is not limited thereto, and as ​ from A to ​ shown in D of FIG., the contour portion (end edge 26) of the opening 12A formed in the pixel inter-insulation layer 12 can be configured. This form is called the third modification of the first embodiment. ​ from A to ​ FIGS. A to D of FIG. are diagrams for explaining an example of a portion where the opening 12A is formed in the pixel inter-insulation layer 12.

[0222] In the display device 10 according to the third modification of the first embodiment, as ​ shown in A of FIG., an inclined surface 27 can be formed in the contour portion (end edge 26) of the opening 12A formed in the pixel inter-insulation layer 12. In ​ the example of A of FIG., the inclined surface 27 slopes downward toward the inside of the opening 12A. In the display device 10 according to the third modification of the first embodiment, the inclined surface 27 is formed at the end edge 26 so that local thinning of the organic layer 14 at the opening end of the opening 12A can be suppressed, thereby suppressing a reduction in luminous efficiency and abnormal light emission due to current leakage between the anode and the cathode (current leakage between the first electrode 13 and the second electrode 15).

[0223] In the display device 10 according to the third modification of the first embodiment, as ​ shown in B of FIG., an eaves-like portion 28 having an inverted conical shape can be formed at the end edge 26 of the opening 12A in the pixel inter-insulation layer 12. Further, as ​ shown in D of FIG., the eaves-like portion 28 can be formed in multiple steps at the end edge 26 of the opening 12A in the pixel inter-insulation layer 12. Such a structure can be formed by laminating multiple films in which the eaves-like portion 28 is formed. Further, as ​As shown in C, the inclined surface 27 may be formed on the upper side (first surface side) of the eaves portion 28 in the end edge 26 of the opening 12A in the inter-pixel insulating layer 12. According to the display device 10 of the third variant of the first embodiment, the eaves portion 28 is formed at the end edge 26 of the opening 12A in the inter-pixel insulating layer 12, so that the organic layer 14 is thinned or stepped at the position of the eaves portion 28, thereby suppressing the current leakage between the sub-pixels 101 and suppressing the reduction of the luminous efficiency and the abnormal light emission. The current leakage between the sub-pixels 101 may be the current leakage through the hole injection layer 140 and the hole transport layer 141. In this regard, in particular, by reducing the thickness of the hole injection layer 140 and the hole transport layer 141 constituting the organic layer 14 at the eaves portion 28, the current leakage between the sub-pixels 101 can be more effectively suppressed. From the viewpoint of suppressing current leakage between the sub-pixels 101 and current leakage between the first electrode 13 and the second electrode 15 , it is preferable to combine the third modification of the first embodiment, the above-described second modification, the fourth modification described later, and the like.

[0224] (Variant 4)

[0225] In the display device 10 according to the first embodiment, as ​ A and ​ As shown in FIG. 1B , the groove 29 may be formed at a position between adjacent sub-pixels 101. This form is referred to as a fourth modification of the first embodiment. ​ A and ​ B is a diagram for explaining an example of the fourth modification of the first embodiment. ​ A and ​ B corresponds to a ​ The cross section at the location of the cross section of B.

[0226] exist ​ In the example of A, the groove 29 is formed between adjacent sub-pixels 101G in the inter-pixel insulating layer 12, but may be formed between adjacent sub-pixels 101R and 101B, or may be formed between adjacent sub-pixels 101 of different color types.

[0227] It should be noted that in the display device 10 according to the third modification example of the first embodiment, as ​ As shown in FIG. 2B , an eave-shaped extension portion 40 may be formed at the upper end of the groove 29. ​ In the example of B, in a plan view of the display device 10 , the extension portion 40 extends from the upper end of the groove 29 in the inward direction of the groove 29 .

[0228] In the display device 10 according to the fourth modification of the first embodiment, the groove 29 is formed at a position between adjacent sub-pixels 101, so that the organic layer 14 is locally thinned (or stepped), thereby effectively suppressing current leakage between the sub-pixels 101.

[0229] (Modification 5)

[0230] In the display device 10 according to the first embodiment, as ​ shown in C of, the pixel electrode 41 can be formed on the upper surface (first surface) side of the inter-pixel insulating layer 12 at a position between adjacent sub-pixels 101. This form is referred to as the fifth modification of the first embodiment. ​ C of is a diagram for explaining an example of the fifth modification of the first embodiment. A material similar to that of the first electrode can be used as the material of the pixel electrode 41.

[0231] In ​ the example of C of, the pixel electrode 41 is formed between adjacent sub-pixels 101G on the upper surface of the inter-pixel insulating layer 12, but the pixel electrode 41 can be formed between adjacent sub-pixels 101R and 101B, or the pixel electrode 41 can be formed between adjacent sub-pixels 101 of different color types.

[0232] According to the fifth modification of the first embodiment, the pixel electrode 41 is formed at a position between adjacent sub-pixels 101, so that the leakage current is drawn into the pixel electrode 41, thereby effectively suppressing a decrease in luminous efficiency and abnormal light emission.

[0233] (Modification 6)

[0234] In the display device 10 according to the first embodiment, in ​ the example of, the first organic layer 14A1 can be configured as shown in ​ A to ​ C of. This form is referred to as the sixth modification of the first embodiment. ​ A to ​ C of is a cross-sectional view schematically showing an example of the first organic layer 14A1 in the display device 10 according to the sixth modification of the first embodiment.

[0235] In the display device 10 according to the sixth modification of the first embodiment, the first organic layer 14A1 can be formed to have a plurality of light-emitting layers, as shown in ​ A of. In ​In the example of A, the first organic layer 14A1 has a structure in which a hole injection layer 140, a hole transport layer 141, a light-emitting layer 142, a light-emitting layer 142, an electron transport layer 143, and an electron injection layer 144 are laminated in this order from the side closer to the first electrode 13. In this case, the two light-emitting layers 142 may be layers including different organic light-emitting materials.

[0236] As ​ shown in B of, the first organic layer 14A1 may have a structure in which a hole injection layer 140, a hole transport layer 141, a light-emitting layer 142, an intermediate layer 150, a light-emitting layer 142, an electron transport layer 143, and an electron injection layer 144 are laminated in this order from the side closer to the first electrode 13. A material that can be used for the above-described light-emitting separation layer 145 can be employed as the material of the intermediate layer 150.

[0237] In addition, as ​ shown in C of, the first organic layer 14A1 may have the following structure (2STACK structure, tandem structure): a hole injection layer 140, a hole transport layer 141, a light-emitting layer 142, an electron transport layer 143, a charge generation layer 151, a hole injection layer 140, a light-emitting layer 142, an electron transport layer 143, and an electron injection layer 144 are laminated in this order from the side closer to the first electrode 13. Examples of the charge generation layer 151 include a layer containing an N layer provided on the anode side ( ​ the first electrode 13 in the example of C of) and a P layer provided on the cathode side ( ​ the second electrode 15A1 in the example of C of). Examples of the N layer include a layer formed by including, for example, an alkali metal, an alkaline earth metal, or a rare earth metal as an electron-donating metal, a metal compound, or an organometallic complex of these metals. Examples of the P layer include a layer formed by, for example, an organic compound having acceptor properties (such as an azabenzophenanthrene derivative, such as hexacyanoazabenzophenanthrene (HAT)), an oxide semiconductor (such as molybdenum oxide (MoO3)), and the like.

[0238] (Seventh modification example)

[0239] In the display device 10 according to the first embodiment, as ​ shown in A of and ​ shown in B of, a low refractive index portion 42 can be provided in the first protective layer 16A1. This form is referred to as the seventh modification example of the first embodiment. ​ shown in A of and ​ shown in B of are cross-sectional views for explaining an example of the seventh modification example of the first embodiment. In ​ shown in A of and ​In B, for ease of description, configurations other than the driving substrate 11, the inter-pixel insulating layer 12, the light-emitting element 104G, the first protective layer 16A1, and the low-refractive-index portion 42 are not shown.

[0240] In ​ A of ​ In the display device 10 according to the seventh modification of the first embodiment shown in the example of A and ​ B of ​ the low-refractive-index portion 42 is provided in the end-face protective layer 18 of the first protective layer 16A1. The low-refractive-index portion 42 is provided at a position between adjacent sub-pixels 101. The low-refractive-index portion 42 is defined as a portion having a refractive index lower than that of the end-face protective layer 18.

[0241] The low-refractive-index portion 42 may include a low-refractive-index film 42A as shown in ​ A of ​ or may include a void portion 42B as shown in

[0242] The low-refractive-index film 42A may be a film including various organic materials forming the organic layer 14 or a film including various organic materials forming the organic layer 14 and other organic compounds different from those organic materials, or may be a film including a resin having a low refractive index. Examples of the material of the low-refractive-index film 42A include transparent materials such as SiNx, SiO2, LiF, MgF, and SiON. A porous film (a film having a low film density) may be used as the low-refractive-index film 42A. For example, in the case where SiOx is used as the porous film of the low-refractive-index film 42A, the low-refractive-index film 42A may be a film having a lower refractive index of 1.4 or less.

[0243] Examples of the void portion 42B include an air-gap structure (air layer), etc., and can be formed in a state buried inside the first protective layer 16A1.

[0244] (Eighth modification)

[0245] In the display device 10 according to the first embodiment, in ​ the example, the shape of the opening (the first opening 19A, the second opening 19B) is formed such that the peripheral wall surface 43 as the wall surface portion forming the opening is a non-tapered vertical wall, but the shape of the opening is not limited thereto, and may be as shown in ​ A of ​ B of ​The shape shown in A. This form is referred to as the eighth modification of the first embodiment. ​ of A, ​ of B and ​ of A is a cross-sectional view for explaining an example of the protective layer (first protective layer 16A1) in the display device 10 according to the eighth modification of the first embodiment. It should be noted that in ​ of A, ​ of B and ​ of A, for ease of description, other configurations (such as light-emitting elements 104R and 104B, etc.) other than the structure in which the inter-pixel insulating layer 12, the first light-emitting element (light-emitting element 104G), and the first protective layer 16A1 are arranged on the driving substrate 11 are not shown.

[0246] In the display device 10 according to the eighth modification of the first embodiment, by forming the peripheral wall surface 43 of the first opening 19A as an inclined surface, the first protective layer 16A1 can be formed such that the first opening 19A has a tapered shape (a shape tapered from the first surface toward the second surface) ( ​ of A), and by forming the peripheral wall surface 43 of the first opening 19A as a curved shape, the first protective layer 16A1 can be formed such that the first opening 19A has a curved shape ( ​ of B). The first protective layer 16A1 can be formed such that the outer peripheral wall surface 43 of the first opening 19A has a multi-step shape ( ​ of A). In the example of ​ of A, the first opening 19A has a shape that gradually tapers from the first surface toward the second surface.

[0247] Regarding the shape of the second opening 19B of the first protective layer 16A1, similar to the above-mentioned first opening 19A, the second opening 19B can have a shape selected from a tapered shape ( ​ of A), a curved shape ( ​ of B), and a multi-step shape ( ​ of A). It should be noted that in the examples shown in ​ of A, ​ of B and ​ of A, the shape of the first opening 19A and the shape of the second opening 19B are substantially similar shapes, but they can be different from each other.

[0248] (Ninth modification)

[0249] In the display device 10 according to the first embodiment, as ​As shown in B of FIG. 0, the eaves portion 44 may be formed at the end edge of the outer peripheral wall surface 43, which is the wall surface portion forming the openings (the first opening 19A and the second opening 19B) of the first protective layer 16A1. This configuration is referred to as the ninth modification of the first embodiment. ​ FIG. B is a cross-sectional view for explaining an example of the protective layer (the first protective layer) in the display device 10 according to the ninth modification of the first embodiment. It should be noted that, in ​ FIG. B, for ease of description, other configurations (e.g., the light-emitting elements 104R and 104B, etc.) other than the inter-pixel insulating layer 12, the first light-emitting element (the light-emitting element 104G), and the structure in which the first protective layer 16A1 is disposed on the driving substrate 11 are not shown.

[0250] In the display device 10 according to the ninth modification of the first embodiment, the end face protective layer 18 of the first protective layer 16A1 includes a first layer 18A and a second layer 18B. In ​ the example of FIG. B, the second layer 18B is formed on the upper side (the first surface side) of the first layer 18A and forms the upper end edge of the outer peripheral wall surface 43 of the opening.

[0251] In the outer peripheral wall surface 43 of the opening, in the plan view of the display device 10, the end edge 45 of the second layer 18B extends inward from the upper end edge 46 of the first layer 18A with respect to the opening. This extended portion serves as the eaves portion 44. It should be noted that the opening widths of the openings (the opening width WA of the first opening 19A and the opening width WB of the second opening 19B) are determined at the position of the end edge of the eaves portion 44.

[0252] The eaves portion 44 can be formed, for example, as follows. In the process of forming the end face protective layer 18, the first layer 18A is formed on one surface using a material that can be used to form the end face protective layer 18. The second layer 18B is formed on one surface with a material that is less likely to be etched than the first layer 18A. Then, etching is performed at positions corresponding to the sub-pixels 101R and 101B, thereby forming the first opening 19A and the second opening 19B. At this time, the second layer 18B is less likely to be etched than the first layer 18A, so that the eaves portion 44 is formed as a part of the second layer 18B that extends inward from the upper end edge 46 of the first layer 18A with respect to the opening.

[0253] (Tenth modification)

[0254] In the display device 10 according to the first embodiment, as ​ shown in FIG. A and ​ FIG. B, the concentration ratio (the first concentration ratio) (i.e., the concentration ratio of the components in the second light-emitting element corresponding to the second sub-pixel ( ​The concentration composition of the light-emitting separation layer 145 (composition components) formed in the sub-pixel 101R in B may be different from the concentration ratio (second concentration ratio) (i.e., the composition of the components constituting the light-emitting separation layer 145 formed in the sub-pixel 101B in A corresponding to the third sub-pixel) of the light-emitting separation layer 145 formed in the sub-pixel 101B in A corresponding to the third sub-pixel). This form is referred to as the tenth modification of the first embodiment. ​ The concentration composition of the light-emitting separation layer 145 (composition components) formed in the sub-pixel 101B in A. ​ FIG. A is a cross-sectional view illustrating an example of the third light-emitting element in the display device 10 according to the tenth modification of the first embodiment. ​ FIG. B is a cross-sectional view illustrating an example of the second light-emitting element in the display device 10 according to the tenth modification of the first embodiment.

[0255] In the display device 10 according to the tenth modification of the first embodiment, it is preferable that both the light-emitting separation layer 145 (light-emitting separation layer 145A) formed in the light-emitting element 104R corresponding to the sub-pixel 101R and the light-emitting separation layer 145 (light-emitting separation layer 145B) formed in the light-emitting element 104B corresponding to the sub-pixel 101B are formed using a co-deposited film. Examples of the co-deposited film include a co-deposited film in which a hole transport material is doped with an electron transport material. In the display device 10 according to the tenth modification of the first embodiment, regarding the concentration ratio between the hole transport material and the electron transport material, which are components of the light-emitting separation layer 145, the first concentration ratio determined for the light-emitting separation layer 145A formed in the light-emitting element 104R is different from the second concentration ratio determined for the light-emitting separation layer 145B formed in the light-emitting element 104B.

[0256] In the light-emitting separation layer 145A formed in the light-emitting element 104R, the concentration ratio (first concentration ratio) between the hole transport material and the electron transport material is determined to be such a ratio that the collision frequency of holes (H) and electrons (E) in the red light-emitting layer 142R increases.

[0257] In the light-emitting separation layer 145B formed in the light-emitting element 104B, the concentration ratio (second concentration ratio) between the hole transport material and the electron transport material is determined to be such a ratio that the collision frequency of holes (H) and electrons (E) in the blue light-emitting layer 142B increases.

[0258] It should be noted that the concentration ratio represents the ratio of the amounts of the material components contained in the light separation layer 145. For example, the concentration ratio between the hole transport material and the electron transport material is the molar ratio between the hole transport material and the electron transport material.

[0259] (Eleventh modification)

[0260] In the display device 10 according to the first embodiment, as ​A of ​ as shown in B, the light-emitting separation layer 145 formed in the second sub-pixel ( ​ sub-pixel 101R in B of ​ sub-pixel 101B in A of ​ A of ​ is a cross-sectional view for explaining an example of the third light-emitting element in the display device 10 according to the eleventh modification of the first embodiment.

[0261] In the display device 10 according to the eleventh modification of the first embodiment, in ​ in the example of B, the light-emitting separation layer 145 formed in the second organic layer 14A2 formed in the light-emitting element 104R of the sub-pixel 101R has a structure in which a laminated composition layer (first composition layer 146) and a composition layer (second composition layer 147) are laminated. In ​ in the example of A, the light-emitting separation layer 145 formed in the second organic layer 14A2 formed in the light-emitting element 104B formed in the sub-pixel 101B also has a structure in which the first composition layer 146 and the second composition layer 147 are laminated. As the first composition layer 146 and the second composition layer 147, a layer formed using an electron transport material and a layer formed using a hole transport material can be used respectively. Note that in ​ in A and 18B, when the thickness direction of the light-emitting element 104 is defined as the vertical direction and the side closer to the second electrode 15A2 is defined as the upper side, it is assumed that the first composition layer 146 is higher than the second composition layer 147.

[0262] In the display device 10 according to the eleventh modification of the first embodiment, the thickness ratio (first thickness ratio (R1)) between the first composition layer 146 and the second composition layer 147 in the light-emitting separation layer 145 formed in the second organic layer 14A2 formed in the light-emitting element 104R is different from the thickness ratio (second thickness ratio (R2)) between the first composition layer 146 and the second composition layer 147 in the light-emitting separation layer 145 formed in the second organic layer 14A2 formed in the light-emitting element 104B. R1 and R2 represent (thickness of the first composition layer 146) / (thickness of the second composition layer 147).

[0263] In ​ A of ​ in the example of B, the first thickness ratio R1 determined for the light-emitting element 104R is smaller than the second thickness ratio R2 for the light-emitting element 104B.

[0264] In addition, in the example of A of ​ and B of ​ the thickness of the first composition layer 146 in the light-emission separation layer 145 provided in the second organic layer 14A2 formed in the light-emitting element 104R is smaller than the thickness of the first composition layer 146 in the light-emission separation layer 145 provided in the second organic layer 14A2 formed in the light-emitting element 104B. Since the opening width WB of the second opening 19B is larger than the opening width WA of the first opening 19A, this can be achieved by adjusting the film-forming width when forming the first composition layer 146 by a vapor deposition method.

[0265] In addition, in the example of A of ​ and B of ​ the thickness of the second composition layer 147 in the light-emission separation layer 145 provided in the second organic layer 14A2 formed in the light-emitting element 104R may be substantially equal to the thickness of the second composition layer 147 in the light-emission separation layer 145 provided in the second organic layer 14A2 formed in the light-emitting element 104B. Similar to the first composition layer 146, this can also be achieved by adjusting the film-forming width when forming the second composition layer 147 by a vapor deposition method.

[0266] (Twelfth modification example)

[0267] In the display device 10 according to the first embodiment, as shown in ​ and ​ an auxiliary electrode 21 may be provided in the display area 10A. This form is referred to as the twelfth modification example of the first embodiment. Figure 19 and Figure 26 are cross-sectional views for explaining an example of the auxiliary electrode 21 in the display device 10 according to the twelfth modification example of the first embodiment. Figure 19 is a cross-sectional view showing an example in which the auxiliary electrode 21 is connected to the second electrode 15A1 of the light-emitting element 104G. Figure 26 is a cross-sectional view showing an example in which the auxiliary electrode 21 is connected to the second electrode 15A1 and the second electrode 15A2. It should be noted that, for ease of description, the layer structures constituting the sub-pixels 101R and 101B are not shown in Figure 19 and the sub-pixel 101B is not shown in Figure 26 .

[0268] In the display device 10 according to the twelfth modification example of the first embodiment shown in the example of Figure 19 as shown in A of Figure 25 the auxiliary electrode 21 is formed inside the display area 10A and outside the sub-pixel 101. In Figure 19In the example, the second electrode 15A1 and the auxiliary electrode 21 are connected by the wiring 65, and the auxiliary electrode 21 is connected to the potential supply wiring 22. The layout of the auxiliary electrode 21 may be formed such that one auxiliary electrode 21 can correspond to one sub-pixel 101 as shown in Figure 25 A, or may be formed such that one auxiliary electrode 21 can correspond to a plurality of sub-pixels 101 as shown in Figure 25 B and Figure 25 C. It should be noted that the auxiliary electrode 21 shown in Figure 25 B is different from the auxiliary electrode 21 shown in Figure 25 C in the number of sub-pixels 101 corresponding to one auxiliary electrode 21. In addition, for ease of description, the shape of the sub-pixel 101 is rectangular in Figure 25 A, and hexagonal in Figure 25 B and Figure 25 C.

[0269] In addition, in the display device 10 according to the twelfth modification of the first embodiment, as shown in Figure 25 A, the auxiliary electrode 21 is formed inside the display area 10A and outside the sub-pixel 101. In the example of Figure 25 A, the second electrode 15A1 and the auxiliary electrode 21 are connected by the wiring 65, and the auxiliary electrode 21 is connected to the potential supply wiring 22.

[0270] In the display device 10 according to the twelfth modification of the first embodiment, the auxiliary electrode 21 is provided in the display area 10A such that the distance from the sub-pixel 101 to the second electrode 15 and the auxiliary electrode 21 is shortened. Therefore, the voltage drop caused by the resistance of the second electrode 15 (such as the cathode resistance in the example of Figure 1 ) can be suppressed.

[0271] (Thirteenth Modification)

[0272] In the display device 10 according to the first embodiment, as shown in Figure 20A and Figure 20B , the second protective layer 16A2 may have a laminated structure in which a plurality of layers are laminated. This form is called the thirteenth modification of the first embodiment. Figure 20A and Figure 20B are cross-sectional views for explaining an example of the display device 10 according to the thirteenth modification of the first embodiment.

[0273] In the display device 10 according to the twelfth modification of the first embodiment shown in the example of Figure 20A , the second protective layer 16A2 has a laminated structure in which three layers are laminated. In addition, as shown in Figure 20AAs shown in the example of , the second protective layer 16A2 may have a laminated structure of three layers in which an inorganic protective layer 47 (first inorganic protective layer 47A), an organic protective layer 48, and an inorganic protective layer 47 (second inorganic protective layer 47B) are laminated in order from the side closer to the driving substrate 11.

[0274] The first inorganic protective layer 47A and the second inorganic protective layer 47B may be formed of the same material or may be formed of different materials. Examples of the materials of the first inorganic protective layer 47A and the second inorganic protective layer 47B include SiON and the like.

[0275] Examples of the material of the organic protective layer 48 include acrylic resin and the like.

[0276] In the case where the second protective layer 16A2 has a laminated structure of three layers in which the first inorganic protective layer 47A, the organic protective layer 48, and the second inorganic protective layer 47B are laminated, it is preferable to connect the first inorganic protective layer 47A and the second inorganic protective layer 47B in the outer region 10B of the display region 10A. In this case, as Figure 20B shown, the outer peripheral end 49 of the organic protective layer 48 is preferably covered with the first inorganic protective layer 47A and the second inorganic protective layer 47B. Since the first inorganic protective layer 47A and the second inorganic protective layer 47B are connected in the outer region of the display region 10A, even if an uneven structure associated with openings (first opening 19A and second opening 19B) is formed in the first protective layer 16A1, the second organic layer 14A2 and the second electrode 15A2 can suppress the possibility of moisture entering the organic protective layer 48 from the outer peripheral end of the second protective layer 16A2, and the reliability of the display device 10 can be improved. It should be noted that, in Figure 20B for convenience of description, the layer structure on the second surface side (-Z direction side) of the second protective layer 16A2 (the structure in which the light-emitting element 104 and the first protective layer 16A1 are formed on the driving substrate 11) is referred to as the structure Z.

[0277] In the case where the second protective layer 16A2 has a laminated structure of three layers in which the first inorganic protective layer 47A, the organic protective layer 48, and the second inorganic protective layer 47B are laminated, the outer peripheral edge of the second protective layer 16A2 may have a multi-step structure.

[0278] In the case where the second protective layer 16A2 has a laminated structure in which a plurality of layers are laminated, as Figure 20C shown, a color filter 60 and a lens 62 described later in the fourteenth modification example of the first embodiment and the fifteenth modification example of the first embodiment may be embedded in the second protective layer 16A2. Figure 20CIt is a cross-sectional view schematically showing an example in which a color filter 60 and a lens 62 in a display device 10 according to a thirteenth modification of the first embodiment are embedded in a second protective layer 16A2.

[0279] In Figure 20C In the shown display device 10, the second protective layer 16A2 includes a five-layer first inorganic protective layer 47A, a first organic protective layer 48A, a second inorganic protective layer 47B, a second organic protective layer 48B, and a third inorganic protective layer 47C. In this case, the first inorganic protective layer 47A, the second inorganic protective layer 47B, and the third inorganic protective layer 47C can be arranged similarly to the above-described inorganic protective layer 47. The first organic protective layer 48A and the second organic protective layer 48B can be structured similarly to the above-described organic protective layer 48.

[0280] Furthermore, in the display device 10 shown in this example, the color filter 60 is formed between the first inorganic protective layer 47A and the first organic protective layer 48A. Note that as the color filter 60, a red color filter 60R, a green color filter 60G, and a blue color filter 60B, which will be described later, are provided. In addition, the second inorganic protective layer 47B is formed on the first organic protective layer 48A (on the first surface side), and the lens 62 is formed between the second inorganic protective layer 47B and the second organic protective layer 48B. Then, the third inorganic protective layer 47C is formed on the first surface side of the second organic protective layer 48B.

[0281] It should be noted that as Figure 20C shown, when the second protective layer 16A2 has an organic protective layer 48 and an inorganic protective layer 47, as described above, it is preferable that the inorganic protective layer 47 is formed outside the outer peripheral end 49 of the organic protective layer 48 (on the outer region 10B side). When the second protective layer 16A2 is formed to have a structure of a five-layer first inorganic protective layer 47A, a first organic protective layer 48A, a second inorganic protective layer 47B, a second organic protective layer 48B, and a third inorganic protective layer 47C, as Figure 20D shown, it is preferable to connect the first inorganic protective layer 47A, the second inorganic protective layer 47B, and the third inorganic protective layer 47C in the outer region 10B of the display region 10A. In Figure 20D the shown example, the outer peripheral end 49 of the first organic protective layer 48A is covered with the first inorganic protective layer 47A and the second inorganic protective layer 47B, and the outer peripheral end 49 of the second organic protective layer 48B is covered with the second inorganic protective layer 47B and the third inorganic protective layer 47C. With this configuration, in the display device 10, the possibility of moisture entering the organic protective layer 48 from the outer peripheral end of the second protective layer 16A2 can be suppressed.

[0282] (Fourteenth modification)

[0283] In the display device 10 according to the first embodiment, as Figure 21A shown, a color filter 60 can be provided. This form is referred to as a fourteenth modification of the first embodiment. Figure 21A FIG. is a cross-sectional view showing an example of a display device 10 according to a fourteenth modification of the first embodiment. Note that, in Figure 21A , for ease of description, the sealing resin layer 23 and the counter substrate 24 are not shown.

[0284] (Color filter)

[0285] In Figure 21A the display device 10 shown, the color filter 60 is provided on the first surface side (upper side, +Z direction side) of the second protective layer 16A2. Examples of the color filter 60 include an on-chip color filter (OCCF). The color filter 60 is provided according to the color type of the sub-pixel 101. Examples of the color filter 60 include Figure 21A in the example, a red color filter (red color filter 60R), a green color filter (green color filter 60G), and a blue color filter (blue color filter 60B). The red color filter 60R, the green color filter 60G, and the blue color filter 60B are respectively provided in the sub-pixels 101R, 101G, and 101B. Since the color filter 60 is provided in the display device 10, light corresponding to the color types of the sub-pixels 101R, 101G, and 101B can be effectively extracted to the outside. Note that the color filter 60 can be provided for all color types of the sub-pixels 101, or can be provided for the sub-pixels 101 corresponding to some color types.

[0286] The size (width) of the color filter 60 can be determined according to the sizes of the first opening 19A and the second opening 19B. For example, when the opening width WB of the second opening 19B is larger than the opening width WA of the first opening 19A, the blue color filter 60B is larger than the red color filter 60R.

[0287] (Partition wall)

[0288] In the display device 10 according to the fourteenth modification of the first embodiment, as Figure 21B shown, a partition wall 61 can be provided between adjacent color filters 60. The partition wall 61 is not particularly limited, but may include a light-transmissive material. It should be noted that the partition wall 61 can be a black matrix. In Figure 21B , for ease of description, other structures except for a part of the second protective layer 16A2, the color filter 60, and the partition wall 61 are not shown. Similarity applies to Figure 21C .

[0289] (Thickness of the color filter)

[0290] Regarding the thickness of the color filter, in Figure 21BIn the example shown, the thickness of the red filter 60R is less than the thicknesses of the green filter 60G and the blue filter 60B, but this is an example. The thickness of the color filter 60 may be greater than the thickness of the partition wall 61 or may be less than the thickness of the partition wall 61. In addition, as Figure 21C shown, only a part of the color filter 60 may be thinner than the partition wall 61. In Figure 21C the example, the thickness of the green filter 60G is less than the thickness of the partition wall 61.

[0291] (Light-shielding layer)

[0292] In the display device 10 according to the fourteenth modification of the first embodiment, color filters 60 corresponding to a plurality of different color types may be stacked outside the display area 10A. For example, a structure in which the red filter 60R and the blue filter 60B are stacked in the vertical direction may be formed outside the display area 10A (not shown). Since a structure serving as a light-shielding layer is formed by stacking the color filters 60, a light-shielding portion can be formed simultaneously with the color filter forming process, and the light-shielding portion can be formed without separately adding a process for forming the light-shielding portion. In addition, as Figure 21E shown, a structure in which the red filter 60R, the blue filter 60B, and the green filter 60G are stacked in the vertical direction may be formed outside the display area 10A. In Figure 21E this, a structural portion of the color filter 60 stacked outside the display area 10A can be used as the light-shielding portion 70. Figure 21E is a cross-sectional view schematically showing an example of a portion that is a structural portion where the color filter 60 is stacked outside the display area 10A and can be used as the light-shielding portion 70 in the display device 10 according to the fourteenth modification of the first embodiment.

[0293] (Another example of the light-shielding portion)

[0294] In the above description, in the display device 10 according to the fourteenth modification of the first embodiment, a case where a structural portion that is a portion where the color filter 60 is stacked outside the display area 10A and can be used as the light-shielding portion 70 has been described, but the light-shielding portion 70 may be formed inside the display area 10A. Specifically, as Figure 21D shown, the light-shielding portion 70 may be formed between adjacent sub-pixels 101 inside the display area 10A. In Figure 21D the example, the light-shielding portion 70 is formed as a structural portion where the color filter 60 is stacked between adjacent sub-pixels 101. Figure 21DIt is a cross-sectional view schematically showing an example of a structural part in which the color filter 60 is stacked inside the display area 10A and can be used as a light-shielding part 70 in the display device 10 according to the fourteenth modification of the first embodiment. In this case, even if light propagates in an unintended direction deviating from the sub-pixel 101, since the structural part where the color filter 60 is stacked is formed as the light-shielding part 70 between adjacent sub-pixels 101, light leakage from between adjacent sub-pixels 101 to the outside can be suppressed.

[0295] It should be noted that in the above description of the display device 10 according to the fourteenth modification of the first embodiment, the case where the color filter 60 is an OCCF has been exemplified. However, a first laminated substrate in which the sealing resin layer 23 and the color filter 60 are formed on the counter substrate 24 and a second laminated substrate in which the light-emitting element 104 and the protective layer 16 are formed on the driving substrate 11 are prepared, and the first laminated substrate and the second laminated substrate can be bonded to each other using a flattening layer interposed therebetween.

[0296] (Fifteenth Modification)

[0297] In the display device 10 according to the first embodiment, a lens 62 can be provided as Figure 22A shown. This form is referred to as the fifteenth modification of the first embodiment. Figure 22A It is a cross-sectional view for explaining an example of the display device 10 according to the fifteenth modification of the first embodiment.

[0298] (Lens)

[0299] In Figure 22A the shown display device 10, the lens 62 is provided on the first surface side (upper side, +Z direction side) of the second protective layer 16A2. The lens 62 is preferably an on-chip alloy (OCL). The material of the lens 62 is not particularly limited, and examples of the material include various materials such as resin materials that can be used to form the sealing resin layer 23 described in the first embodiment. The lens 62 is provided according to the position corresponding to each sub-pixel 101.

[0300] (Shape of the Lens)

[0301] In Figure 22A the example, the lens 62 is preferably formed in a convex shape having a curved surface that bulges and bends in the direction away from the driving substrate 11 (+Z direction), and is preferably a so-called convex lens.

[0302] In the display device 10 according to the fifteenth modification of the first embodiment, the shape and size of the lens 62 can be the same for all sub-pixels 101, or as Figure 22B and Figure 22CAs shown, the shape and size of the lens 62 can vary according to the type of sub-pixel. In Figure 22B the example of Figure 22C , the shape of the lens 62 provided at the position corresponding to the sub-pixel 101R is narrower than the shape of the lens 62 provided at the position corresponding to the sub-pixel 101B. In

[0303] [2 Second Embodiment]

[0304] [2-1 Configuration of the Device]

[0305] As Figure 27 shown, the display device 10 according to the second embodiment separates the light-emitting elements 104 for each sub-pixel 101 and includes a third electrode 63, and the second electrodes 15A1 and 15A2 are connected through the third electrode 63. Except for the configuration in which the light-emitting elements 104 are separated and the structure of the second electrode 15 and the third electrode 63, the display device 10 has a structure similar to that of the display device 10 according to the first embodiment. Therefore, in the second embodiment, the configuration of the sub-pixel 101, the driving substrate 11, the layers constituting the light-emitting element 104, and the counter substrate 24 is similar to that of the first embodiment, and thus the description thereof will be omitted. Figure 27 is a cross-sectional view showing an example of the display device 10 according to the second embodiment.

[0306] (Second Protective Layer)

[0307] A second protective layer 16A2 is formed to cover the third electrode 63. The material of the second protective layer 16A2 can be a material similar to the material of the second protective layer described in the first embodiment.

[0308] (Third Protective Layer)

[0309] In the display device 10 according to the second embodiment, a third protective layer 16A3 is formed between the third electrode 63 and the first protective layer 16A1. The material of the third protective layer 16A3 can be a material similar to the material of the second protective layer 16A2 described above.

[0310] (Second Electrode and Organic Layer)

[0311] Except that the second electrode 15A1 and the first organic layer 14A1 are preferably divided in units of a single sub-pixel 101, the second electrode 15A1 and the first organic layer 14A1 are formed similarly to the first embodiment.

[0312] As Figure 27 and Figure 28As shown in A of FIG. , except for dividing the second electrode 15A2 for each sub-pixel 101 as described above, the second electrode 15A2 is formed in a similar manner to the first embodiment. Figure 28 FIG. A is a diagram schematically showing an example of the positional relationship between the layout of the second electrode 15A1 and the second electrode 15A2 and the layout of the light-emitting unit K in the display device 10 according to the second embodiment. Note that in Figure 28 FIG. A, the formation regions of the second electrode 15A1 and the second electrode 15A2 are hatched. In addition, in Figure 28 FIG. A, for ease of description, the case where the shape of the sub-pixel 101 is a rectangular shape and the layout of the sub-pixels 101 is a lattice shape is taken as an example. Similarity applies to Figure 28 FIG. B.

[0313] Except for dividing the second organic layer 14A2 for each sub-pixel 101, the second organic layer 14A2 is also formed in a similar manner to the first embodiment.

[0314] (Third Electrode)

[0315] In the display device 10 according to the second embodiment, a third electrode 63 is provided to connect the second electrodes 15 formed in different sub-pixels 101. The material of the third electrode 63 may be similar to the material of the second electrode 15. As Figure 28 shown in FIG. B, the third electrode 63 is formed on one surface. Figure 28 FIG. B is a diagram schematically showing an example of the layout of the third electrode 63 in the display device 10 according to the second embodiment. In Figure 28 FIG. B, the formation region of the third electrode 63 is shown hatched.

[0316] (Auxiliary Electrode)

[0317] In the display device 10 according to the second embodiment, similar to the first embodiment, the auxiliary electrode 21 is preferably provided on the driving substrate 11 outside the display region 10A. However, in the display device 10 according to the second embodiment, the third electrode 63 is preferably connected to the auxiliary electrode 21.

[0318] However, in the display device 10 according to the second embodiment, similar to the first embodiment, as Figure 31 shown, the auxiliary electrode 21 may be provided inside the display region 10A. Also in this case, as Figure 31 shown, the third electrode 63 is connected to the auxiliary electrode 21.

[0319] [2-2 Manufacturing Method]

[0320] For example, the manufacturing method of the display device 10 according to the second embodiment can be implemented as follows. A driving substrate 11 is formed, a first organic layer 14A1, a second electrode 15A1, and a first protective layer 16A1 are formed on the driving substrate 11 (i.e., a light-emitting element 104G is formed), and a second organic layer 14A2 and a second electrode 15A2 are formed (i.e., light-emitting elements 104R and 104B are formed). As a method for forming each layer structure so far, a method similar to the method described in the manufacturing method of the display device according to the first embodiment can be used. However, when forming the light-emitting element 104G, the light-emitting element 104 (excluding the continuous portion 103) is divided for each sub-pixel 101.

[0321] As Figure 29 shown in A of, a layer 148 including a material similar to that of the third protective layer 16A3 is formed on one surface of the first surface of the second electrode 15A2. As a method for forming the layer 148, a method similar to the case of forming the second protective layer 16A2 in the manufacturing method of the display device according to the first embodiment can be used.

[0322] Next, the layer 148, the second electrode 15A2, and the second organic layer 14A2 are processed using an etching method or the like to have a layout corresponding to the sub-pixels 101R and 101B ( Figure 29 shown in B of). At this time, the light-emitting elements 104R and 104B are formed in a separated state according to the sub-pixels 101R and 101B.

[0323] Then, as Figure 30 shown in A of, a third protective layer 16A3 is formed to cover the end faces 20R and 20B of the light-emitting elements 104R and 104B. Note that, in the example of A of, the layer 148 is integrated with the third protective layer 16A3. In addition, in the example of A of, the third protective layer 16A3 is formed such that the surface on the first surface side is a flat surface, but this is an example. Figure 30 Figure 30 A contact hole 149 is formed from the first surface side of the third protective layer 16A3 toward the first surface of the second electrode 15 (the second electrode 15A1 and the second electrode 15A2). At this time, the first surface of the second electrode 15 is exposed at the position of the bottom surface of the contact hole 149. A third electrode 63 is formed on the first surface of the third protective layer 16A3, the inner peripheral surface of the contact hole 149, and the second electrode 15 exposed at the bottom surface of the contact hole 149 (

[0324] shown in B of). At this time, the second electrodes 15 formed in the plurality of sub-pixels 101 are electrically connected to each other via the third electrode 63. Figure 30

[0325] ​A second protective layer 16A2 is formed on the first surface side of the third electrode 63. As a method for forming the second protective layer 16A2, a method similar to the case of forming the second protective layer 16A2 in the manufacturing method of the display device according to the first embodiment can be used.

[0326] For the process after forming the second protective layer 16A2, a method similar to the method described in the manufacturing method of the display device according to the first embodiment can be used.

[0327] [2-3 Functions and effects]

[0328] The display device 10 according to the second embodiment can obtain functions and effects similar to those of the first embodiment.

[0329] In the display device 10 according to the second embodiment, the second electrode 15A2 has a structure in which the second electrode 15A2 is divided for each sub-pixel, and thus current leakage between the sub-pixels 101 is less likely to occur. In addition, in the sub-pixels 101R and 101B, the end faces 20R and 20B are more clearly formed in the light-emitting elements 104R and 104B. Therefore, the light generated from the second organic layer 14A2 is reflected at the positions of the end faces 20R and 20B and easily propagates outward from the first surface side, thereby improving the light extraction efficiency.

[0330] It should be noted that any one or a combination of the first to fifteenth modification examples of the display device 10 according to the first embodiment can be applied to the display device 10 according to the second embodiment. Similarity applies to the third embodiment described later.

[0331] [3 Third embodiment]

[0332] [3-1 Configuration of the device]

[0333] In the display device 10 according to the third embodiment, as Figure 32 shown in A, in a plan view of the light-emitting element 104 (when the Z-axis direction is the line-of-sight direction), in at least one of the second sub-pixel ( Figure 32 the sub-pixel 101R in the example of A) or the third sub-pixel ( Figure 32 the sub-pixel 101B in the example of A), a first region (AR1) and a second region (AR2) are formed, which have a thickness of the light-emitting separation layer smaller than that of the first region (AR1), as having different such as Figure 32The region of the thickness of the light-emitting separation layer 145 shown in B. Except that the light-emitting element 104 has multiple regions (the first region AR1 and the second region AR2) with different thicknesses of the light-emitting separation layer, other configurations may have a structure similar to that of the display device 10 according to the first embodiment. Therefore, in the third embodiment, the configurations of the sub-pixel 101, the driving substrate 11, the first electrode 13, the second electrode 15, the protective layer 16, the opposing substrate 24, etc. are similar to those of the first embodiment, and thus will not be described. Figure 32 FIG. A is a cross-sectional view showing an example of the display device 10 according to the third embodiment. In Figure 32 FIG. A, for ease of description, the sealing resin layer 23 and the opposing substrate 24 are not shown. Figure 32 FIG. B schematically shows an enlarged Figure 32 state of the partial enlarged cross-sectional view of the region XS3 in Figure 32 FIG. B shows a partial enlarged cross-sectional view of the light-emitting element 104R as the second light-emitting element. However, in Figure 32 the example of FIG. A, similar to the light-emitting element 104R, the light-emitting element 104B is also divided into parts corresponding to the first region AR1 and the second region AR2.

[0334] (Sub-pixel)

[0335] In Figure 33 the example, the shape of the sub-pixel is formed as a circle. Moreover, the layout of the sub-pixels is a delta layout. However, these are examples, and the shape and layout of the sub-pixels may be the shape and layout shown in the first modification of the first embodiment. Figure 33 FIG. is a plan view showing an example of the division of the first region AR1 and the second region AR2 in the sub-pixel 101. In Figure 33 it, for ease of description, the sizes of the sub-pixel 101R and the sub-pixel 101B are made uniform.

[0336] When the thickness direction of the light-emitting element 104 corresponding to the sub-pixel 101 is the line-of-sight direction, the sub-pixel 101 corresponding to at least one color type is divided into a first region and a second region as two regions with different thicknesses of the light-emitting separation layer 145 of the light-emitting element 104. In Figure 33 the example, the first region AR1 is a predetermined region extending outward from the center of the sub-pixel 101, and the second region AR2 is a predetermined region extending from the outer peripheral edge of the sub-pixel 101 toward the center. It should be noted that, as Figure 33 shown in the example of Figure 30 the sub-pixel 101G in

[0337] (Light-emitting element)

[0338] In the sub-pixel 101 divided into a first region AR1 and a second region AR2, the light-emitting element 104 is configured such that the thickness of the portion of the light-emitting separation layer 145 corresponding to the first region AR1 is different from the thickness of the portion of the light-emitting separation layer 145 corresponding to the second region AR2. Thus, in Figure 32 the example shown in A and 32B of Figure 32 the thickness of the portion of the second organic layer 14A2 corresponding to the first region AR1 (reference numeral TP1 in B of Figure 32 is different from the thickness of the portion of the second organic layer 14A2 corresponding to the second region AR2 (reference numeral TP2 in B of Figure 32 In the example shown in B of Figure 32 In the example of A of Figure 32 for ease of description, the first surface (the surface on the +Z direction side) of the second electrode 15 is flat. However, as shown in B of

[0339] In Figure 32 the example of A of Figure 33 as described above, both the sub-pixels 101R and 101B are divided into a first region AR1 and a second region AR2, and as shown in

[0340] the second region AR2 is formed in an annular shape, and the first region AR1 is formed inside the second region AR2. Further, in the sub-pixel 101R, the light-emitting element 104R is configured such that the thickness of the portion of the light-emitting separation layer 145 corresponding to the first region AR1 is greater than the thickness of the portion of the light-emitting separation layer 145 corresponding to the second region AR2. Thus, in the portion of the light-emitting element 104R corresponding to the first region AR1, collisions between holes and electrons may occur in the blue light-emitting layer 142B on the side of the second electrode 15A2. Further, in the portion of the light-emitting element 104R corresponding to the second region AR2, collisions between holes and electrons may occur in the red light-emitting layer 142R on the side of the first electrode 13.Moreover, in sub-pixel 101B, similar to sub-pixel 101R, a light-emitting element 104B is configured such that the thickness of the portion of the light-emitting separation layer corresponding to the first region is greater than the thickness of the portion of the light-emitting separation layer corresponding to the second region. To this end, in the portion of the light-emitting element 104B corresponding to the first region, similar to the light-emitting element 104R, collisions between holes and electrons may occur in the blue light-emitting layer 142B on the second electrode 15A2 side. In addition, in the portion of the light-emitting element 104R corresponding to the second region, collisions between holes and electrons may occur in the red light-emitting layer 142R on the first electrode 13 side.

[0341] (Area ratio of the first region and the second region)

[0342] In the display device 10 of the third embodiment, the area ratio of the first region AR1 and the second region AR2 for the second sub-pixel is different from the area ratio of the first region AR1 and the second region AR2 for the third sub-pixel. In Figure 32 the A of Figure 33 the example, the area ratio of the first region AR1 and the second region AR2 for sub-pixel 101R is different from the area ratio of the first region AR1 and the second region AR2 for sub-pixel 101B, and the area of the first region AR1 of sub-pixel 101B is larger than the area of the second region AR2 compared to sub-pixel 101R.

[0343] In the light-emitting element 104R for sub-pixel 101R, the area of the first region AR1 is smaller than the area of the second region AR2, so that the light generated in the red light-emitting layer 142R becomes stronger, and strong red light can be extracted from the light-emitting element 104R.

[0344] In the light-emitting element 104B of sub-pixel 101B, the area of the first region AR1 is larger than the area of the second region AR2, so that the light generated in the blue light-emitting layer 142B becomes stronger, and strong blue light can be extracted from the light-emitting element 104B.

[0345] [3-2 Manufacturing method]

[0346] In the manufacturing method of the display device 10 according to the third embodiment, in addition to adjusting conditions (film formation width, opening width of the limited version, etc.), the light-emitting separation layer 145 is formed by a vapor deposition method so as to create a difference between the thickness of the portion of the light-emitting separation layer 145 corresponding to the first region AR1 and the thickness of the portion of the light-emitting separation layer 145 corresponding to the second region AR2.

[0347] [3-3 Function and effect]

[0348] In the display device 10 according to the third embodiment, the first region AR1 and the second region AR2 are formed in at least one of the second sub-pixel or the third sub-pixel, such that in the plan view of the light-emitting element 104, two types of regions (i.e., the first region AR1 and the second region AR2) of the two types of light-emitting layers 142 having different light-emitting intensity balances are formed in one region of the sub-pixel 101. Therefore, by using both the thickness of the light-emitting separation layer 145 and the area ratio of the first region AR1 and the second region AR2, the balance of the light-emitting intensity can be adjusted. Accordingly, the display device 10 according to the third embodiment can achieve a more precise balance of the light-emitting intensity corresponding to the color type of the sub-pixel 101.

[0349] [3-4 Variation Example]

[0350] In the display device 10 according to the third embodiment, as Figure 34 shown in A of, the lens 64 can be provided. This configuration is referred to as a variation example of the first embodiment. Figure 34 A of is a cross-sectional view for explaining an example of the display device 10 according to the variation example of the third embodiment.

[0351] (Lens)

[0352] In Figure 34 the display device 10 shown in A of, the lens 64 is provided on the first surface side (upper side or +Z direction side) of the second protective layer 16A2. The lens 64 is preferably an on-chip alloy (OCL). The material of the lens 64 is not particularly limited, and examples of the material include various materials that can be used as the material of the lens 62 described in the fifteenth variation example of the first embodiment. The lens 64 is provided according to the position corresponding to each sub-pixel 101.

[0353] (Shape of the Lens)

[0354] In Figure 10 the example of, the lens 64 is preferably formed in a convex shape having a curved surface that bulges and bends in the direction away from the driving substrate 11 (+Z direction), and is preferably a so-called convex lens 64A.

[0355] (Annular Lens)

[0356] The lens 64 is not limited to a convex lens, and preferably employs a lens that can mainly collect the light corresponding to the color type of the sub-pixel according to the color type of the light obtained in the first region and the color type of the light obtained in the second region. For example, in the sub-pixel 101R, strong red light is generated in the second region and strong blue light is generated in the first region. Therefore, it is preferable to provide a lens that can mainly collect the light generated in the second region. Specifically, in the sub-pixel 101R, as Figure 34 shown in A of andFigure 34 The annular lens 64B shown in B of Figure 34 In the example of A of , the convex lens 64A is formed as the lens 64 at positions corresponding to the sub-pixels 101G and 101B, and the annular lens 64B is formed as the lens 64 at the position corresponding to the sub-pixel 101R.

[0357] Note that although the display device 10 according to the third embodiment may be provided with a color filter, similar to the case of the lens 64, a color filter that can mainly select light corresponding to the color type of the sub-pixel 101 can be used as the color filter.

[0358] [4 Fourth Embodiment]

[0359] As Figure 35 shown in A of Figure 35 and B of , except for the configuration that defines the thickness relationship of the second organic layer 14A2 constituting the second sub-pixel ( Figure 35 the sub-pixel 101R in the example of B of ) and the third sub-pixel ( Figure 35 the sub-pixel 101B in the example of A of ) and the configuration that defines the size relationship between the size of the first opening and the second opening, the display device 10 according to the fourth embodiment can be configured similarly to the display device 10 according to the first embodiment. In the description of the fourth embodiment, the points different from the first embodiment will be described. Figure 35 shown in A of Figure 35 and B of are cross-sectional views schematically showing an example of the second organic layer 14A2 used in the display device 10 according to the fourth embodiment.

[0360] (Second Organic Layer)

[0361] In Figure 35 the examples shown in A of Figure 35 and B of , in the second organic layer 14A2, the thickness (TE2) of the electron transport layer 143 of the light-emitting element 104B corresponding to the sub-pixel 101B is formed to be thicker than the thickness (TE1) of the electron transport layer 143 of the light-emitting element 104R corresponding to the sub-pixel 101R. The method of realizing the thickness difference of the electron transport layer 143 can be achieved by applying a method similar to the method of performing the process of forming the light-emitting separation layer 145 by the vapor deposition method described in the manufacturing method of the display device 10 according to the first embodiment.

[0362] (First Opening and Second Opening)

[0363] Regarding the formation of Figure 35 the second sub-pixel of the second organic layer 14A2 in A of Figure 35 and B of Figure 35In the example of B, the sub-pixel 101R) and the third sub-pixel ( Figure 35 In the example of A, the dimensions of the opening width WA of the first opening 19A and the opening width WB of the second opening 19B corresponding to the sub-pixel 101B are, similar to the first embodiment, preferably such that the opening width WB of the second opening 19B is greater than the opening width WA of the first opening 19A.

[0364] (Function and effect)

[0365] For the display device 10 according to the fourth embodiment, in Figure 35 of A and Figure 35 In the sub-pixel 101B shown in the example of B, in the second light-emitting layer (blue light-emitting layer) located on the side of the second electrode 15A2, a collision between holes (H) and electrons (E) may occur, and the light generated in the light-emitting element 104B becomes strong blue. In the sub-pixel 101R, a collision between holes (H) and electrons (E) may occur in the first light-emitting layer (red light-emitting layer) located on the side of the first electrode 13, and the light generated in the light-emitting element 104R becomes strong (red).

[0366] (Another example of the fourth embodiment)

[0367] In the display device 10 according to the fourth embodiment, the second organic layer 14A2 is not limited to the above Figure 35 of A and Figure 35 shown in the example of B. In the second organic layer 14A2, as Figure 36 of A and Figure 36 shown in B, the thickness (TL2) of the hole transport layer 141 of the light-emitting element 104B corresponding to the sub-pixel 101B can be formed to be smaller than the thickness (TL1) of the hole transport layer 141 of the light-emitting element 104R corresponding to the sub-pixel 101R. Figure 36 of A and Figure 36 of B is a cross-sectional view schematically showing another example of the second organic layer 14A2 used in the display device 10 according to the fourth embodiment.

[0368] (The first opening and the second opening)

[0369] Corresponding to the formation of Figure 36 of A and Figure 36 In the second organic layer 14A2 in B, the second sub-pixel ( Figure 36 In the example of B, the sub-pixel 101R) and the third sub-pixel ( Figure 36 In the example of A, the sub-pixel 101B) of the first opening 19A and the opening width WB of the second opening 19B preferably have dimensions corresponding to the formation of Figure 35 of A and Figure 35The second sub-pixel of the second organic layer 14A2 in B ( Figure 36 Sub-pixel 101R in the example of B) and the third sub-pixel ( Figure 36 Sub-pixel 101B in the example of A of A) have different dimensional relationships between the opening width WA of the first opening 19A and the opening width WB of the second opening 19B, and the opening width WA of the first opening 19A is preferably greater than the opening width WB of the second opening 19B. In this case, as a method for realizing the thickness difference of the hole transport layer 141, a method similar to the method for realizing the thickness difference of the electron transport layer 143 described above can be applied. That is, the method for realizing the thickness difference of the hole transport layer 141 can be realized by applying a method similar to the method of performing the process of forming the light-emitting separation layer 145 by a vapor deposition method described in the method of manufacturing the display device 10 according to the first embodiment.

[0370] (Functions and effects of another example of the fourth embodiment)

[0371] In Figure 36 In sub-pixel 101B shown in the example of A, similar to Figure 35 the case of sub-pixel 101B shown in the example of A, collisions between holes (H) and electrons (E) may occur in the second light-emitting layer (blue light-emitting layer) located on the side of the second electrode 15A2, and the light generated in the light-emitting element 104B becomes stronger in blue. In Figure 36 In sub-pixel 101R shown in the example of B, similar to Figure 35 the case of sub-pixel 101R shown in the example of A, collisions between holes (H) and electrons (E) may occur in the first light-emitting layer (red light-emitting layer) located on the side of the first electrode 13, and the light generated in the light-emitting element 104R becomes stronger (red).

[0372] In the description of the above first embodiment, it was described that the second organic layer 14A2 has a plurality of layers (such as a hole transport layer 141, a light-emitting layer 142, an electron transport layer 143, etc.), and the thickness of the light-emitting separation layer 145 in the plurality of layers is different between the second light-emitting element corresponding to the second sub-pixel and the third light-emitting element corresponding to the third sub-pixel. In addition, in the fourth embodiment, different from the first embodiment, it has been described that in the plurality of layers forming the second organic layer 14A2, the thicknesses of another layer different from the light-emitting separation layer 145 in the second light-emitting element corresponding to the second sub-pixel and the third light-emitting element corresponding to the third sub-pixel are different. Regarding the layer whose thickness is to be changed among the plurality of layers forming the second organic layer 14A2, from the perspective of being more easily and precisely controlling the emission colors of the second sub-pixel and the third sub-pixel, it is preferable to change the thickness of the light-emitting separation layer 145 according to the sub-pixels of the first embodiment. In addition, the first embodiment and the fourth embodiment can also be combined. For example, the thickness of the electron transport layer 143 and the thickness of the light-emitting separation layer 145 can be different between the second light-emitting element corresponding to the second sub-pixel and the third light-emitting element corresponding to the third sub-pixel.

[0373] Based on the descriptions of the first embodiment and the fourth embodiment, this specification discloses that the thickness of at least one layer among the plurality of layers forming the second organic layer is different between at least one layer in the second light-emitting element and at least one layer in the third light-emitting element.

[0374] Note that in the description of the fourth embodiment, in addition to defining the configuration (the first configuration) of the thickness relationship of the layers constituting the second organic layer 14A2 in the sub-pixel 101R in the example of B of the second sub-pixel ( Figure 35 and the sub-pixel 101B in the example of A of the third sub-pixel ( Figure 35 and the configuration (the second configuration) defining the dimensional relationship between the first opening and the second opening, the situation similar to the first embodiment has been described. However, in addition to the first configuration and the second configuration, the fourth embodiment can be configured to be similar to the second embodiment or the third embodiment. For example, in the case where the fourth embodiment is constructed similarly to the third embodiment except for the first structure and the second structure, the second organic layer 14A2 can be configured such that the difference between the thickness of a part of the first region AR1 and the thickness of a part of the second region AR2 is caused by the thickness difference of another layer (such as the electron transport layer 143, etc.) different from the light-emitting separation layer 145.

[0375] [Example of the case where the display device has a resonator structure]

[0376] The description of the case where the resonator structure is formed in the display device 10 continues to use the display device 10 according to the first embodiment as an example. In the display device 10 according to the first embodiment, the resonator structure may be further formed in at least some of the plurality of sub-pixels 101. Note that the resonator structure described using the first embodiment can be applied to the second to fourth embodiments.

[0377] (Resonator structure)

[0378] The resonator structure is formed in the display device 10. The resonator structure is a cavity structure and is a structure that causes resonance of light generated in the organic layer 14. In the display device 10, the resonator structure is formed in the light-emitting element 104 (light-emitting elements 104R, 104B, and 104G), and the resonator structure includes a first electrode 13, an organic layer 14, and a second electrode 15. Causing resonance of the light emitted from the organic layer 14 means causing resonance of light of a specific wavelength included in the emitted light.

[0379] In the resonator structure, among the light emitted from the organic layer 14, the component that is reflected and resonates between predetermined layers such as between the first electrode 13 and the second electrode 15 is enhanced, and the enhanced light is emitted toward the outside from the display surface DP side (the first surface side).

[0380] The organic layer 14 generally uses light corresponding to the color type of the sub-pixel 101 as the emitted light, and the resonator structure causes resonance of light of a specific wavelength included in the emitted light from the organic layer 14. In this case, the light of a predetermined wavelength in the emitted light from the organic layer 14 is strengthened. Then, in a state where the light of the predetermined wavelength is emphasized, the light is emitted toward the outside from the second electrode 15 side (i.e., the light-emitting surface side) of the light-emitting element 104. Note that the light of the predetermined wavelength is light corresponding to a predetermined color type and represents light corresponding to the color type determined according to the sub-pixel 101. The display device 10 includes light-emitting elements 104R, 104G, and 104B corresponding to the sub-pixels 101R, 101G, and 101B. In addition, resonator structures are respectively formed corresponding to the light-emitting elements 104R, 104G, and 104B. In the resonator structure in the sub-pixel 101R, the red light of the light emitted from the organic layer 14 resonates. In a state where the red light is further emphasized, the light is emitted toward the outside from the second electrode 15 of the light-emitting element 104R. Therefore, red light with excellent color purity can be emitted from the sub-pixel 101R. In the resonator structures in the sub-pixels 101G and 101B, the green light and the blue light of the light emitted from the organic layer 14 resonate respectively. In the sub-pixels 101G and 101B, in a state where the green light and the blue light are further emphasized, the light is emitted outward from the second electrodes 15 of the light-emitting elements 104G and 104B. Therefore, green light and blue light with excellent color purity can be respectively emitted from the sub-pixels 101G and 101B.

[0381] Since the resonator structure is formed in the display device 10 in this way, the color purity of the sub-pixel 101 can be improved.

[0382] Hereinafter, the first to seventh examples will be sequentially described as example cases where the display device 10 includes a resonator structure, and the description will continue.

[0383] (Resonator structure: First example)

[0384] Figure 37 A of FIG. is a schematic cross-sectional view for explaining a first example in the case where the display device 10 has a resonator structure.

[0385] In the first example, the thickness of the first electrode 13 and the thickness of the second electrode 15 are uniform among the sub-pixels 101R, 101G, and 101B.

[0386] In each of the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B), the optical adjustment layer 31 is provided on the lower side (second surface side) of the first electrode 13, the reflector 30 is provided on the second surface side of the optical adjustment layer 31, and the optical adjustment layer 31 is formed between the reflector 30 and the first electrode 13. A resonator structure that causes resonance of the light generated by the organic layer 14 is formed between the reflector 30 and the second electrode 15.

[0387] The thickness of the reflector 30 is uniform among the sub-pixels 101R, 101G, and 101B. The thickness of the optical adjustment layer 31 varies according to the sub-pixels 101R, 101G, and 101B. Since the thickness of the optical adjustment layer 31 varies according to the sub-pixels 101R, 101G, and 101B, an optical distance suitable for causing resonance suitable for the sub-pixels 101R, 101G, and 101B can be set.

[0388] In Figure 37 In the example of A of FIG., the positions of the first surfaces of the reflectors 30 provided in the sub-pixels 101R, 101G, and 101B are set to be aligned in the vertical direction. In the sub-pixels 101R, 101G, and 101B, the position of the first surface of the second electrode 15 varies with the thickness difference between the optical adjustment layers 31.

[0389] The reflector 30 can be formed of a metal such as aluminum (Al), silver (Ag), or copper (Cu), or an alloy containing these metals as a main component.

[0390] The optical adjustment layer 31 can be formed of an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon oxynitride (SiOxNy), or an organic resin material such as an acrylic resin or a polyimide resin. Each optical adjustment layer 31 can be a single layer or a multilayer film formed of multiple materials.

[0391] Each second electrode 15 is preferably a layer serving as a semi-transmissive reflective film. The second electrode 15 can be formed of magnesium (Mg), silver (Ag), a magnesium-silver alloy (MgAg) containing these materials as main components, an alloy containing an alkali metal or an alkaline earth metal, or the like. The configurations of the first electrode 13 and the organic layer 14 are similar to those described above, and thus their descriptions will be omitted.

[0392] (Resonator structure: Second example)

[0393] Figure 37 FIG. B is a schematic cross-sectional view for explaining a second example in the case where the display device 10 has a resonator structure. The second embodiment has a layer structure similar to that of the first embodiment, except that the positions of the second electrode 15 and the reflector 30 are different from those of the first embodiment.

[0394] In the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B), the upper surfaces of the second electrodes 15 are arranged such that their positions in the vertical direction are aligned. According to the thickness difference between the optical adjustment layers 31, the reflectors 30 provided in the sub-pixels 101R, 101G, and 101B are located at different positions in the vertical direction.

[0395] (Resonator structure: Third example)

[0396] Figure 38 FIG. A is a schematic cross-sectional view for explaining a third example in the case where the display device 10 has a resonator structure. The third example has a layer structure similar to that of the first example, except that the thickness of the reflector 30 varies among the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B).

[0397] In the sub-pixels 101R, 101G, and 101B, the upper surfaces of the second electrodes 15 are arranged such that their positions in the vertical direction are aligned. According to the thickness difference between the optical adjustment layers 31, the positions of the first surfaces of the reflectors 30 provided in the sub-pixels 101R, 101G, and 101B vary in the vertical direction. However, the positions of the second surfaces of the reflectors 30 are aligned among the sub-pixels 101R, 101G, and 101B.

[0398] (Resonator structure: Fourth example)

[0399] Figure 38 B is a schematic cross-sectional view for explaining a fourth example in the case where the display device 10 has a resonator structure. The fourth example is similar to the first example, but does not include the optical adjustment layer 31, and the thickness of the first electrode 13 varies among the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B).

[0400] Regarding the thickness of the first electrode 13, the respective thicknesses of the first electrode 13 are designed to set an optical distance suitable for causing optical resonance in the sub-pixels 101R, 101G, and 101B.

[0401] (Resonator structure: Fifth example)

[0402] Figure 39 A is a schematic cross-sectional view for explaining a fifth example in the case where the display device 10 has a resonator structure. The fifth example is similar to the first example except that it does not include the optical adjustment layer 31 and an oxide film 32 is formed on the first surface side (the side facing the surface of the first electrode 13) of the reflector 30.

[0403] The thickness of the oxide film 32 varies among the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B).

[0404] Regarding the thickness of the oxide film 32, the respective thicknesses of the oxide film 32 are designed to set an optical distance suitable for causing optical resonance in the sub-pixels 101R, 101G, and 101B.

[0405] The oxide film 32 is a film obtained by oxidizing the surface of the reflector 30 and is formed of, for example, alumina, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. The oxide film 32 functions as an insulating film for adjusting the optical path length (optical distance) between the reflector 30 and the second electrode 15.

[0406] For example, the oxide film 32 having a thickness suitable for the sub-pixels 101R, 101G, and 101B can be formed in the following manner.

[0407] First, the substrate on which the reflector 30 is formed is immersed in a container filled with an electrolytic solution, and an electrode is provided facing the reflector 30.

[0408] Then, with this electrode as a reference, a positive voltage is applied to the reflector 30 to anodize the reflector 30. A voltage corresponding to the thickness of the oxide film 32 to be obtained is applied to the reflectors 30 of the sub-pixels 101R, 101G, and 101B. Thus, oxide films 32 with different thicknesses (oxide films 32 having thicknesses suitable for the sub-pixels 101R, 101G, and 101B) can be formed together on the reflectors 30 of the sub-pixels 101R, 101G, and 101B.

[0409] (Resonator Structure: Sixth Example)

[0410] Figure 39 FIG. B is a schematic cross-sectional view for explaining a sixth example in the case where the display device 10 has a resonator structure.

[0411] In the sixth example, each resonator structure of the display device 10 is formed with a structure in which a first electrode 13, an organic layer 14, and a second electrode 15 are layered. In the sixth example, each first electrode 13 is a first electrode (also serving as a reflector) 33 designed to serve as an electrode and a reflector. The first electrode (also serving as a reflector) 33 is formed of a material having an optical constant selected according to the types of the light-emitting elements 104R, 104G, and 104B. Due to the change in the phase shift of the first electrode (also serving as a reflector) 33, an optical distance for generating an optimal resonance of the wavelength of light corresponding to the color to be displayed can be set.

[0412] The first electrode (also serving as a reflector) 33 can be formed of a single-component metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing these metals as main components. For example, the first electrode (also serving as a reflector) 33R of the sub-pixel 101R can be formed of copper (Cu), and the first electrodes (also serving as a reflectors) 33G of the sub-pixel 101G and 33B of the sub-pixel 101B can be formed of aluminum.

[0413] The second electrode 15 and the organic layer 14 are similar to those in the first example, and thus their descriptions will be omitted.

[0414] (Resonator Structure: Seventh Example)

[0415] Figure 40 FIG. is a schematic cross-sectional view for explaining a seventh example in the case where the display device 10 has a resonator structure.

[0416] In the seventh example, the resonator structure shown in the sixth example is provided to the sub-pixels 101R and 101G (light-emitting elements 104R and 104G), and the resonator structure shown in the first example is provided to the sub-pixel 101B (light-emitting element 104B).

[0417] [Example of positional relationship in the case where the display device includes a wavelength selection unit]

[0418] Regarding the positional relationship in the case where the wavelength selection unit is formed in the display device 10, the mutual positional relationship among the light-emitting unit, the lens member, and the wavelength selection unit will now be described, taking the display device 10 obtained by combining the fifteenth modification example and the fourteenth modification example of the first embodiment as an example. The display device 10 obtained by combining the fifteenth modification example and the fourteenth modification example of the first embodiment includes a color filter as the wavelength selection unit. Note that [Example of the case where the display device includes a wavelength selection unit] can be applied to each embodiment (second to fourth embodiments) including a color filter and a lens.

[0419] (Color filter and lens)

[0420] In the display device 10 obtained by combining the fifteenth modification example and the fourteenth modification example of the first embodiment, as Figure 10 shown, the wavelength selection unit and the lens member are provided in each sub-pixel 101. In the example shown by the combination of the fifteenth modification example and the fourteenth modification example of the first embodiment, the wavelength selection unit is a color filter 60. For example, as the color filter 60, a red color filter 60R, a green color filter 60G, and a blue color filter 60B are respectively provided for the sub-pixels 101R, 101G, and 101B. At this time, a light absorption layer is preferably provided between the adjacent color filters 60. Examples of the light absorption layer include a black matrix portion. Further, in the example shown by the combination of the fifteenth modification example and the fourteenth modification example of the first embodiment, a lens 62 is provided as the lens member.

[0421] (Relationship between the normal lines passing through the centers of the light-emitting unit, the lens member, and the wavelength selection unit)

[0422] Hereinafter, the relationship among the normal line LN passing through the center of the light-emitting unit, the normal line LN' passing through the center of the lens member, and the normal line LN'' passing through the center of the wavelength selection unit will be described. Here, the light-emitting portion is, for example, the light-emitting portion K. The lens member is, for example, the lens 62. The wavelength selection unit is, for example, the red color filter 60R, the green color filter 60G, and the blue color filter 60B.

[0423] It should be noted that the size of the wavelength selection unit can be appropriately changed according to the light emitted from the light-emitting unit, or in the case where the light absorption unit (e.g., the black matrix portion) is provided between the wavelength selection units of adjacent light-emitting units, the size of the light absorption unit can be appropriately changed according to the light emitted from the light-emitting unit. In addition, the size of the wavelength selection unit can be appropriately changed according to the distance (offset) d0 between the normal line passing through the center of the light-emitting unit and the normal line passing through the center of the wavelength selection unit. The planar shape of the wavelength selection unit can be the same as, similar to, or different from the planar shape of the lens member.

[0424] Hereinafter, with reference to Figure 41 A of Figure 41 B of Figure 41 C of Figure 42 and Figure 2 , the relationship between the normal lines passing through the centers of each unit will be described in the case where the light-emitting unit 51 (corresponding to the light-emitting unit K in the example of

[0425] As shown in A of Figure 41 , the normal line LN passing through the center of the light-emitting unit 51, the normal line LN'' passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 can be coincident with each other. That is, D0 = 0 and d0 = 0 can be satisfied. Here, D0 represents the distance (offset) between the normal line LN passing through the center of the light-emitting unit 51 and the normal line LN' passing through the center of the lens member 53, and d0 represents the distance (offset) between the normal line LN passing through the center of the light-emitting unit 51 and the normal line LN'' passing through the center of the wavelength selection unit 52.

[0426] As shown in B of Figure 41 , it can be configured such that the normal line LN passing through the center of the light-emitting unit 51 and the normal line LN'' passing through the center of the wavelength selection unit 52 are coincident with each other, but the normal line LN passing through the center of the light-emitting unit 51 and the normal line LN'' passing through the center of the wavelength selection unit 52 are not coincident with the normal line LN' passing through the center of the lens member 53. That is, D0 > 0 and d0 = 0 can be satisfied.

[0427] As shown in C of Figure 41 , it can be configured such that the normal line LN passing through the center of the light-emitting unit 51 is not coincident with the normal line LN'' passing through the center of the wavelength selection unit 52 and the normal line LN' passing through the center of the lens member 53, but the normal line LN'' passing through the center of the wavelength selection unit 52 and the normal line LN' passing through the center of the lens member 53 are coincident with each other. That is, D0 > 0, d0 > 0, and D0 = d0 can be satisfied.

[0428] As shown in Figure 42As shown, the normal line LN that can be configured to pass through the center of the light-emitting unit 51, the normal line LN" that passes through the center of the wavelength selection unit 52, and the normal line LN' that passes through the center of the lens member 53 do not coincide with each other. That is, D0>0, d0>0, and D0≠d0 can be satisfied. Here, the center of the wavelength selection unit 52 (the position indicated by the black square in Figure 42 is preferably located on the straight line LL connecting the center of the light-emitting unit 51 and the center of the lens member 53 (the position indicated by the black circle in Figure 42 ). Specifically, assuming that the distance in the thickness direction ( Figure 42 the vertical direction in

[0429] between the center of the light-emitting unit 51 and the center of the wavelength selection unit 52 is LL1, and the distance in the thickness direction between the center of the wavelength selection unit 52 and the center of the lens member 53 is LL2, preferably

[0430] D0>d0>0

[0431] is satisfied, and considering manufacturing variations,

[0432] d0:D0 = LL1:(LL1 + LL2)

[0433] is satisfied.

[0434] Here, the thickness direction refers to the thickness direction of the light-emitting unit 51, the wavelength selection unit 52, and the lens member 53. Figure 43 In the following, with reference to A in Figure 43 B in Figure 44 , the relationship between the normal lines that all pass through the centers of each unit in the case where the light-emitting unit 51, the lens member 53, and the wavelength selection unit 52 are arranged in this order will be described.

[0435] As shown in A of Figure 43 , the normal line LN that can be configured to pass through the center of the light-emitting unit 51, the normal line LN" that passes through the center of the wavelength selection unit 52, and the normal line LN' that passes through the center of the lens member 53 coincide with each other. That is, D0>0 and d0 = 0 can be satisfied.

[0436] As shown in B of Figure 43 , the normal line LN that can be configured to pass through the center of the light-emitting unit 51 does not coincide with the normal line LN" that passes through the center of the wavelength selection unit 52 and the normal line LN' that passes through the center of the lens member 53, but the normal line LN" that passes through the center of the wavelength selection unit 52 and the normal line LN' that passes through the center of the lens member 53 coincide with each other. That is, D0>0, d0>0, and D0 = d0 can be satisfied.

[0437] As shown in Figure 44As shown, the normal line LN that can be configured to pass through the center of the light-emitting unit 51, the normal line LN" that passes through the center of the wavelength selection unit 52, and the normal line LN' that passes through the center of the lens member 53 do not coincide with each other. Here, the center of the lens member 53 (the position indicated by the black circle in Figure 44 is preferably located on the straight line LL connecting the center of the light-emitting unit 51 and the center of the wavelength selection unit 52 (the position indicated by the black square in Figure 44 ). Specifically, assuming that the distance in the thickness direction ( Figure 44 the vertical direction in

[0438] d0>D0>0

[0439] is satisfied between the center of the light-emitting unit 51 and the center of the lens member 53, and considering manufacturing variations,

[0440] D0:d0 = LL2:(LL1 + LL2)

[0441] is satisfied.

[0442] Here, the thickness direction refers to the thickness direction of the light-emitting unit 51, the wavelength selection unit 52, and the lens member 53.

[0443] [7 Application Example]

[0444] (Electronic Device)

[0445] The display device 10 according to one of the above embodiments can be provided in various electronic devices. In particular, the display device is preferably provided in a device that requires high image resolution and is used near the eyes for viewing in a magnified state, and the device includes an electronic viewfinder of a camera or a single-lens reflex camera, a head-mounted display, etc.

[0446] (Specific Example 1)

[0447] Figure 45 A in Figure 45 is a front view showing an example of the appearance of the digital camera 310.

[0448] The monitor 314 is provided at a position offset to the left from the center of the rear surface of the camera body 311. An electronic viewfinder (eyepiece window) 315 is provided above the monitor 314. By observing through the electronic viewfinder 315, the photographer can visually recognize the optical image of the object guided from the imaging lens unit 312 and determine the picture composition. As the electronic viewfinder 315, any one of the display devices 10 according to the above-described embodiments and modifications can be used.

[0449] (Specific Example 2)

[0450] Figure 46 is a perspective view showing an example of the appearance of the head-mounted display 320. For example, the head-mounted display 320 includes earhook portions 322 on both sides of a display unit 321 having a glasses shape for the user to wear the head-mounted display 320 on the head. As the display unit 321, any one of the display devices 10 according to the above-described embodiments and variations can be used.

[0451] (Specific Example 3)

[0452] Figure 47 is a perspective view showing an example of the appearance of the television device 330. The television device 330 includes, for example, a video display screen unit 331 including a front panel 332 and a filter 333, and the video display screen unit 331 includes any one of the display devices 10 according to the above-described embodiments and variations.

[0453] (Specific Example 4)

[0454] Figure 48 shows an example of the appearance of the see-through head-mounted display 340. The see-through head-mounted display 340 includes a main body 341, an arm 342, and a lens barrel 343.

[0455] The main body 341 is connected to the arm 342 and the glasses 350. Specifically, an end portion of the main body 341 in the long side direction is coupled to the arm 342, and one side of the side surface of the main body 341 is coupled to the glasses 350 via a connecting member. Note that the main body 341 can be directly mounted on the human head.

[0456] The main body 341 includes a control substrate and a display unit for controlling the operation of the see-through head-mounted display 340. The arm 342 connects the main body 341 and the lens barrel 343 and supports the lens barrel 343. Specifically, the arm 342 is coupled to the end portions of the main body 341 and the lens barrel 343 and fixes the lens barrel 343. In addition, the arm 342 includes a signal line for communicating data related to the image to be provided from the main body 341 to the lens barrel 343.

[0457] The lens barrel 343 projects the image light provided from the main body 341 toward the eyes of the user wearing the see-through head-mounted display 340 through the lens 351 via the arm 342. In this see-through head-mounted display 340, the display unit of the main body 341 includes one of the above-described display devices 10 and the like.

[0458] (Specific Example 5)

[0459] Figure 49 is a perspective view showing an appearance example of the smartphone 360. As Figure 49 shown, the smartphone 360 includes a display unit 361 that displays information such as pixels and an operation unit 362 that includes buttons and the like for receiving operation inputs from the user. The display device 10 according to the above-described embodiments and modifications can be applied to the display unit 361.

[0460] (Specific Example 6)

[0461] Any of the above-described display devices 10 and the like can be included in a vehicle or various displays.

[0462] Figure 50 A of Figure 50 B of Figure 50 is a view showing an example of the internal configuration of the vehicle 500 provided with various displays. Specifically, Figure 50 A of

[0463] is a view showing an example of the internal state of the vehicle 500 when viewed from the rear to the front of the vehicle 500, and

[0464] B of Figure 50 is a view showing an example of the internal state of the vehicle 500 when viewed from the inclined rear to the inclined front of the vehicle 500. Figure 50B of FIG. shows an example of the center display 501 having a horizontally elongated shape extending from the driver's seat 508 side to the passenger's seat 509 side, but the screen size and position of the center display 501 are appropriately determined. The center display 501 can display information sensed by various sensors. As a specific example, the center display 501 can display an image captured by an image sensor, an image of the distance to an obstacle in front of or to the side of the vehicle 500, a distance measured by a ToF sensor, the body temperature of a passenger detected by an infrared sensor, etc. The center display 501 can be used to display at least one piece of information, including, for example, safety-related information, operation-related information, rescue logs, health-related information, authentication / identification-related information, and entertainment-related information.

[0465] Safety-related information is information such as drowsiness sensing, eye-off-the-road sensing, sensing of pranks by children riding together, and the presence or absence of seat belt wearing, sensing of passenger departure, and is information sensed by sensors arranged to overlap, for example, with the rear surface side of the center display 501. Operation-related information is information obtained by detecting gestures related to the operations of the occupants using sensors. The gestures to be sensed can include the operations of various types of devices in the vehicle 500. For example, the operations of an air conditioning device, a navigation device, an audio-visual (AV) device, a lighting device, etc. are detected. Life logs include the life logs of all occupants. For example, rescue logs include the action records of each occupant in the vehicle. By acquiring and storing rescue logs, the state of each passenger at the time of an accident can be checked. Health-related information uses sensors such as temperature sensors to sense the body temperature of the occupants and estimates the health status of the occupants based on the sensed body temperature. Alternatively, the face of the occupant can be imaged using an image sensor, and the health status of the occupant can be estimated based on the imaged facial expression. In addition, a conversation can be automatically carried out with the occupant by voice, and the health status of the occupant can be estimated based on the content of the response from the occupant. Authentication / identification-related information includes information on a keyless entry function that performs face authentication using sensors and a function that automatically adjusts the seat height and position by face recognition. Entertainment-related information includes information on a function that detects operation information on an audio / video (AV) device used by the occupant using sensors and a function that identifies the face of the occupant using sensors and provides content suitable for the occupant through the AV device.

[0466] The console display 502 can be used to display, for example, life log information. The console display 502 is provided near the shift lever 511 of the center console 510 between the driver's seat 508 and the passenger seat 509. The console display 502 can also display information detected by different sensors. In addition, the console display 502 can display an image of the vehicle surroundings captured by an image sensor, or can display a distance image of an obstacle existing in the vehicle surroundings.

[0467] The head-up display 503 is virtually displayed behind the windshield 512 in front of the driver's seat 508. For example, the head-up display 503 can be used to display at least one piece of information including safety-related information, operation-related information, rescue logs, health-related information, authentication / identification-related information, and entertainment-related information. Since the head-up display 503 is virtually provided in front of the driver's seat 508 in many cases, the head-up display 503 is suitable for displaying information directly related to the operation of the vehicle 500, such as the speed of the vehicle 500, the remaining amount of fuel (battery), etc.

[0468] The digital rearview mirror 504 can not only display the rear of the vehicle 500 but also display the state of the rear seat occupants. Therefore, by overlappingly disposing sensors on the back side of the digital rearview mirror 504, it can be used to display, for example, life log information.

[0469] The steering wheel display 505 is arranged near the center of the steering wheel 513 of the vehicle 500. The steering wheel display 505 can be used to display at least one piece of information, including, for example, safety-related information, operation-related information, rescue logs, health-related information, authentication / identification-related information, and entertainment-related information. Specifically, since the steering wheel display 505 is located near the driver's hand, the steering wheel display 505 is suitable for displaying life log information such as the driver's body temperature, or for displaying information about the operation of an AV device, an air conditioning device, etc.

[0470] The rear entertainment display 506 is attached to the rear surface side of the driver's seat 508 or the passenger seat 509 and is used to enable the passengers in the rear seats to enjoy watching / listening. The rear entertainment display 506 can be used to display at least one piece of information, including, for example, safety-related information, operation-related information, rescue logs, health-related information, authentication / identification-related information, and entertainment-related information. In particular, when the rear entertainment display 506 is in front of the passengers in the rear seat, information related to the passengers in the rear seat is displayed. For example, information about the operation of an AV device or an air conditioning device can be displayed, or the measurement result of the body temperature of the passengers in the rear seat using a temperature sensor can be displayed on the display.

[0471] Sensors can be arranged in an overlapping manner on the rear surface side of the display device 10 or the like so that the distance to an object existing in the surrounding environment can be measured. Optical ranging methods are roughly classified into a passive type and an active type. By the passive type method, distance measurement is performed by receiving light from an object without projecting light from the sensor onto the object. The passive type methods include a lens focusing method, a stereo method, and a monocular vision method. The active type methods include distance measurement performed by projecting light onto an object and using a sensor to receive the reflected light from the object to measure the distance. The active type methods include a lidar method, an active stereo method, an illuminance difference stereo method, a moiré topography method, and an interference method. Any of the above display devices 10 or the like can be used for distance measurement by any of these methods. By sensors arranged in an overlapping manner on the rear surface side of the above display device 10 or the like, the above passive type or active type distance measurement can be performed.

[0472] Although the display devices according to the first to fourth embodiments, the display devices according to each example, the method of manufacturing the display device, and the application examples have been specifically described as examples of the light-emitting devices of the present disclosure, the present disclosure is not limited to the display devices according to the above first to fourth embodiments, the display devices according to each example, the method of manufacturing the display device, and the application examples, and various modifications can be made based on the technical concept of the present disclosure.

[0473] For example, the configurations, methods, processes, shapes, materials, numerical values, etc. exemplified in the display devices according to the first to fourth embodiments, the display devices according to each example, the method of manufacturing the display device, and the above application examples are merely examples, and different configurations, methods, processes, shapes, materials, numerical values, etc. can be used as needed.

[0474] Without departing from the gist of the present disclosure, the configurations, methods, processes, shapes, materials, numerical values, etc. of the display devices according to the above first to fourth embodiments, the display devices according to each example, the method of manufacturing the display device, and the application examples can be combined with each other.

[0475] Unless otherwise specified, the materials exemplified in the display devices according to the first to fourth embodiments, the display devices according to each example, the method of manufacturing the display device, and the above application examples can be used alone or in combination of two or more.

[0476] In addition, the present disclosure can also adopt the following configurations. (1)

[0478] A display device, comprising:

[0479] A first sub-pixel, a second sub-pixel, and a third sub-pixel as sub-pixels, wherein

[0480] A light-emitting element including an organic layer is formed in each sub-pixel.

[0481] The first sub-pixel includes a first light-emitting element as the light-emitting element, and the first light-emitting element includes a first organic layer as the organic layer.

[0482] The display device further includes: a protective layer that at least covers the first light-emitting element.

[0483] In the protective layer, a first opening and a second opening are formed as openings in portions corresponding to the second sub-pixel and the third sub-pixel, respectively, and

[0484] The opening shapes of the first opening and the second opening are different. (2)

[0486] The display device according to (1), wherein

[0487] The second sub-pixel and the third sub-pixel respectively include a second light-emitting element and a third light-emitting element as the light-emitting elements.

[0488] The second light-emitting element and the third light-emitting element include a second organic layer as the organic layer having a common material, and

[0489] The second organic layer includes a plurality of light-emitting layers having different light-emitting peak wavelengths and a light-emitting separation layer provided between the plurality of light-emitting layers. (3)

[0491] The display device according to (2), wherein

[0492] In the second organic layer, the portion formed in the second light-emitting element and the portion formed in the third light-emitting element are continuous. (4)

[0494] The display device according to (2) or (3), wherein

[0495] The second organic layer has a structure in which a plurality of layers are laminated, and

[0496] In the thickness of at least one layer among the plurality of layers forming the second organic layer, the thickness of at least one layer in the second light-emitting element is different from the thickness of at least one layer in the third light-emitting element. (5)

[0498] The display device according to (4), wherein

[0499] The thickness of at least one layer is the thickness of the light-emitting separation layer. (6)

[0501] The display device according to any one of (2) to (5), wherein

[0502] The light-emitting separation layer includes various types of constituent components, and

[0503] A first concentration ratio, which is the concentration ratio of the constituent components of the light-emitting separation layer formed in the second organic layer of the second light-emitting element, is different from a second concentration ratio, which is the concentration ratio of the constituent components of the light-emitting separation layer formed in the second organic layer of the third light-emitting element. (7)

[0505] The display device according to any one of (2) to (6), wherein

[0506] The light-emitting separation layer has a structure in which a plurality of constituent layers are laminated, and

[0507] A first thickness ratio is different from a second thickness ratio. The first thickness ratio is the ratio of the thickness of the constituent layer of the light-emitting separation layer formed in the second organic layer of the second light-emitting element, and the second thickness ratio is the ratio of the thickness of the constituent layer of the light-emitting separation layer formed in the second organic layer of the third light-emitting element. (8)

[0509] The display device according to any one of (2) to (7), wherein

[0510] In the plan view of the light-emitting element, each of the second light-emitting element and the third light-emitting element has a first region and a second region of the light-emitting separation layer having a thickness smaller than that of the first region as regions where the thickness of the light-emitting separation layer is different, and

[0511] The second light-emitting element and the third light-emitting element have different area ratios of the first region and the second region. (9)

[0513] The display device according to any one of (1) to (8), wherein

[0514] The opening width of the first opening is smaller than the opening width of the second opening. (10)

[0516] The display device according to any one of (1) to (9), wherein

[0517] The opening includes a wall surface portion, and

[0518] The wall surface portion has a shape selected from non-tapered, tapered, curved, and multi-step shapes. (11)

[0520] The display device according to any one of (1) to (10), wherein

[0521] The opening includes a wall surface portion, and

[0522] In the wall surface portion, an eaves portion extending toward the inside of the opening is formed at the end edge of the wall surface portion. (12)

[0524] The display device according to any one of (1) to (11) includes:

[0525] A substrate, wherein,

[0526] The light-emitting element includes a first electrode and a second electrode sandwiching an organic layer, and the first electrode, the organic layer, and the second electrode are laminated in this order from the side closer to the substrate, and

[0527] In at least a part of the second sub-pixel and the third sub-pixel, the size of the opening is different from the size of the region where the first electrode and the organic layer are in contact with each other. (13)

[0529] The display device according to any one of (1) to (12) includes:

[0530] A substrate, wherein,

[0531] The light-emitting element includes a first electrode and a second electrode sandwiching an organic layer, and the first electrode, the organic layer, and the second electrode are laminated in this order from the side closer to the substrate,

[0532] The second electrode is divided in units of each sub-pixel, and

[0533] A third electrode is provided to connect the second electrodes formed in different sub-pixels. (14)

[0535] The display device according to any one of (1) to (13) includes:

[0536] A substrate, wherein,

[0537] The light-emitting element includes a first electrode and a second electrode sandwiching an organic layer, and the first electrode, the organic layer, and the second electrode are laminated in this order from the side closer to the substrate,

[0538] The display device further includes: an auxiliary electrode configured to be electrically connectable to the outside, and

[0539] The second electrode is connected to the auxiliary electrode. (15)

[0541] The display device according to any one of (1) to (14) includes:

[0542] A substrate, wherein,

[0543] The light-emitting element includes a first electrode and a second electrode sandwiching an organic layer, and the first electrode, the organic layer, and the second electrode are sequentially laminated from the side closer to the substrate, and

[0544] The laminated structures of the second electrode and the first organic layer formed in the plurality of first light-emitting elements are connected to each other. (16)

[0546] The display device according to any one of (1) to (15), wherein

[0547] The opening width of the opening is 1 μm or more and 10 μm or less. (17)

[0549] The display device according to any one of (1) to (16), wherein

[0550] The thickness of the protective layer is 1 μm or more. (18)

[0552] An electronic device includes the display device according to any one of (1) to (17). (19)

[0554] A method of manufacturing a display device, the method including:

[0555] Forming a first light-emitting element having a first organic layer at a position corresponding to a first sub-pixel;

[0556] Forming a protective layer covering the first light-emitting element;

[0557] Forming a first opening and a second opening at positions corresponding to a second sub-pixel and a third sub-pixel in the protective layer to have different opening shapes; and

[0558] Forming a second organic layer in portions corresponding to the first opening and the second opening, the second organic layer forming second and third light-emitting elements corresponding to the second and third sub-pixels respectively and having a common material.

[0559] List of reference signs

[0560] 10 Display device

[0561] 10A Display area

[0562] 11 Driving substrate

[0563] 13 First electrode

[0564] 14 Organic layer

[0565] 14A1 First organic layer

[0566] 14A2 Second organic layer

[0567] 15 Second electrode

[0568] 15A1 Second electrode

[0569] 15A2 Second electrode

[0570] 16A1 First protective layer

[0571] 16A2 Second protective layer

[0572] 17 Upper surface protective layer

[0573] 18 End face protective layer

[0574] 19A First opening

[0575] 19B Second opening

[0576] 23 Sealing resin layer

[0577] 24 Opposing substrate

[0578] 51 Light-emitting unit

[0579] 52 Wavelength selection unit

[0580] 53 Lens member

[0581] 60 Color filter

[0582] 62 Lens

[0583] 63 Third electrode

[0584] 64 Lens

[0585] 101 Sub-pixel

[0586] 101B Sub-pixel

[0587] 101G Sub-pixel

[0588] 101R Sub-pixel

[0589] 103 Continuous part

[0590] 104 Light-emitting element

[0591] 104B Light-emitting element

[0592] 104G Light-emitting element

[0593] 104R Light-emitting element

[0594] 120 Production line

[0595] 121 Vapor deposition source

[0596] 122 Restricting plate

[0597] 140 Hole injection layer

[0598] 141 Hole transport layer

[0599] 142 Light-emitting layer

[0600] 143 Electron transport layer

[0601] 144 Electron injection layer

[0602] 145 Light-emitting separation layer

[0603] AR1 First region

[0604] AR2 Second region

[0605] WA Opening width

[0606] WB Opening width

[0607] WK Opening width.

Claims

1. A display device, comprising: A first sub-pixel, a second sub-pixel, and a third sub-pixel as sub-pixels, wherein, A light-emitting element including an organic layer is formed in each sub-pixel, The first sub-pixel includes a first light-emitting element as the light-emitting element, and the first light-emitting element includes a first organic layer as the organic layer, The display device further includes: a protective layer that at least covers the first light-emitting element, In the protective layer, a first opening is formed as an opening in a portion corresponding to the second sub-pixel, and a second opening is formed as an opening in a portion corresponding to the third sub-pixel, and The opening shapes of the first opening and the second opening are different.

2. The display device according to claim 1, wherein, The second sub-pixel includes a second light-emitting element as the light-emitting element, and the third sub-pixel includes a third light-emitting element as the light-emitting element, The second light-emitting element and the third light-emitting element include a second organic layer as an organic layer having a common material, and The second organic layer includes a plurality of light-emitting layers having different light-emitting peak wavelengths and a light-emitting separation layer provided between the plurality of light-emitting layers.

3. The display device according to claim 2, wherein, In the second organic layer, a portion formed in the second light-emitting element and a portion formed in the third light-emitting element are continuous.

4. The display device according to claim 2, wherein, The second organic layer has a structure in which a plurality of layers are laminated, and In the thickness of at least one layer among the plurality of layers forming the second organic layer, the thickness of at least one layer in the second light-emitting element is different from the thickness of at least one layer in the third light-emitting element.

5. The display device according to claim 4, wherein, The thickness of at least one layer is the thickness of the light-emitting separation layer.

6. The display device according to claim 2, wherein, The light-emitting separation layer includes various types of components, and A first concentration ratio, which is the concentration ratio of the components of the light-emitting separation layer formed in the second organic layer in the second light-emitting element, is different from a second concentration ratio, which is the concentration ratio of the components of the light-emitting separation layer formed in the second organic layer in the third light-emitting element.

7. The display device according to claim 2, wherein, The light-emitting separation layer has a structure in which a plurality of component layers are laminated, and A first thickness ratio is different from a second thickness ratio. The first thickness ratio is the ratio of the thickness of the component layers of the light-emitting separation layer formed in the second organic layer in the second light-emitting element, and the second thickness ratio is the ratio of the thickness of the component layers of the light-emitting separation layer formed in the second organic layer in the third light-emitting element.

8. The display device according to claim 2, wherein, In the plan view of the light-emitting element, the second light-emitting element and the third light-emitting element each have a first region and a second region as regions of the light-emitting separation layer having different thicknesses, the second region having a light-emitting separation layer with a smaller thickness than the first region, and the second light-emitting element and the third light-emitting element have different area ratios of the first region to the second region.

9. The display device according to claim 1, wherein, the opening width of the first opening is smaller than the opening width of the second opening.

10. The display device according to claim 1, wherein, the opening includes a wall surface portion, and the wall surface portion has a shape selected from non-tapered, tapered, curved, and multi-step shapes.

11. The display device according to claim 1, wherein, the opening includes a wall surface portion, and in the wall surface portion, an eaves portion extending toward the inside of the opening is formed at an end edge of the wall surface portion.

12. The display device according to claim 1, comprising: a substrate, wherein, the light-emitting element includes a first electrode and a second electrode, the first electrode and the second electrode sandwich the organic layer, and the first electrode, the organic layer, and the second electrode are laminated in sequence from the side close to the substrate, and in at least a part of the second sub-pixel and the third sub-pixel, the size of the opening is different from the size of the region where the first electrode and the organic layer are in contact with each other.

13. The display device according to claim 1, comprising: a substrate, wherein, the light-emitting element includes a first electrode and a second electrode, the first electrode and the second electrode sandwich the organic layer, and the first electrode, the organic layer, and the second electrode are laminated in sequence from the side close to the substrate, the second electrode is divided in units of each sub-pixel, and a third electrode is provided to connect the second electrodes formed in different sub-pixels.

14. The display device according to claim 1, comprising: a substrate, wherein, the light-emitting element includes a first electrode and a second electrode, the first electrode and the second electrode sandwich the organic layer, the first electrode, the organic layer, and the second electrode are laminated in sequence from the side close to the substrate, the display device further includes an auxiliary electrode configured to be electrically connectable to the outside, and the second electrode is connected to the auxiliary electrode.

15. The display device according to claim 1, comprising: a substrate, wherein, the light-emitting element includes a first electrode and a second electrode, the first electrode and the second electrode sandwich the organic layer, and the first electrode, the organic layer, and the second electrode are laminated in sequence from the side close to the substrate, and the laminated structures of the second electrode and the first organic layer formed in a plurality of the first light-emitting elements are connected to each other.

16. The display device according to claim 1, wherein, the opening width of the opening is 1 μm or more and 10 μm or less.

17. The display device according to claim 1, wherein, The thickness of the protective layer is 1 μm or more.

18. An electronic device, comprising: The display device according to claim 1.

19. A method of manufacturing a display device, the method comprising: forming a first light-emitting element having a first organic layer at a position corresponding to a first sub-pixel; forming a protective layer covering the first light-emitting element; forming a first opening and a second opening at positions corresponding to a second sub-pixel and a third sub-pixel in the protective layer, such that the opening shapes thereof are different from each other; and forming a second organic layer in portions corresponding to the first opening and the second opening, the second organic layer forming a second light-emitting element and a third light-emitting element corresponding to the second sub-pixel and the third sub-pixel respectively and having a common material.

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