Display device and electronic apparatus

Abstract

A display device capable of suppressing light leakage between adjacent pixels is provided. This display device is provided with: a plurality of light-emitting elements arranged two-dimensionally; a plurality of layers stacked on the plurality of light emitting elements; and a partition wall disposed between adjacent light emitting elements in a plan view and formed across two or more layers included in the plurality of layers. The cross-sectional shape of the partition wall includes a regular tapered shape.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a display device and an electronic device including the same. BACKGROUND

[0002] In recent years, display devices in which a plurality of light emitting elements are arranged two-dimensionally have been widely used. In this type of display device, light leakage can occur between adjacent pixels, and color mixing can occur between pixels. For this reason, techniques for preventing light leakage between adjacent pixels have been studied. For example, Patent Literature 1 proposes a technique for preventing light leakage between adjacent pixels by providing a separation portion in a protective layer in a display device including a substrate, a plurality of light emitting elements, a protective layer, and a color filter.

[0003] LIST OF CITATIONS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2018-92873 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, the technique described in Patent Literature 1 cannot sufficiently prevent light leakage, and there is room for improvement.

[0008] An object of the present disclosure is to provide a display device capable of preventing light leakage between adjacent pixels and an electronic device including the same.

[0009] SOLUTION TO PROBLEM

[0010] To solve the above problem, The display device according to the present disclosure includes: a plurality of light emitting elements arranged two-dimensionally; a plurality of layers stacked on the plurality of light emitting elements; and a separation wall arranged between adjacent light emitting elements when viewed in plan and formed on two or more layers included in the plurality of layers, wherein a cross-sectional shape of the separation wall includes a right pyramid shape. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a cross-sectional view of a display device in which a color filter is formed on a glass substrate.

[0012] Figure 2 is a cross-sectional view of a display device in which a color filter is formed on a driving substrate.

[0013] Figure 3 is a cross-sectional view of a display device in which a color filter and a lens array are formed on a driving substrate.

[0014] Figure 4 is a cross-sectional view of a display device in which a gap exists between adjacent lenses.

[0015] Figure 5 is a plan view of a display device according to an embodiment.

[0016] Figure 6 is an enlarged cross-sectional view of a display region of a display device according to an embodiment.

[0017] Figure 7 A of FIG. 1 is a cross-sectional view of an OLED layer including a single layer of light emitting cells. Figure 7 B of FIG. 1 is a cross-sectional view of an OLED layer including two layers of light emitting cells.

[0018] Figure 8 is a process diagram for describing a first example of a method for manufacturing a display device according to an embodiment.

[0019] Figure 9 is a process diagram for describing a first example of a method for manufacturing a display device according to an embodiment.

[0020] Figure 10 is a process diagram for describing a first example of a method for manufacturing a display device according to an embodiment.

[0021] Figure 11 is a process diagram for describing a second example of a method for manufacturing a display device according to an embodiment.

[0022] Figure 12 is a process diagram for describing a second example of a method for manufacturing a display device according to an embodiment.

[0023] Figure 13 is a process diagram for describing a second example of a method for manufacturing a display device according to an embodiment.

[0024] Figure 14 is an enlarged cross-sectional view of a display region of a display device according to a modification.

[0025] Figure 15 is a cross-sectional view of a first example of a leak prevention structure.

[0026] Figure 16 is a cross-sectional view of a second example of a leak prevention structure.

[0027] Figure 17 is a cross-sectional view of a third example of a leak prevention structure.

[0028] Figure 18 is a cross-sectional view of a fourth example of a leak prevention structure.

[0029] Figure 19 is a cross-sectional view of a fifth example of a leak-proof structure.

[0030] Figure 20 is a cross-sectional view of a sixth example of a leak-proof structure.

[0031] Figure 21 is a cross-sectional view of a seventh example of a leak-proof structure.

[0032] Figure 22 is Figure 21 is an enlarged cross-sectional view of the slot shown.

[0033] Figure 23 is a cross-sectional view of an eighth example of a leak-proof structure.

[0034] Figure 24 is a cross-sectional view of a ninth example of a leak-proof structure.

[0035] Figure 25 is a plan view used to describe an arrangement of a first electrode and a third electrode.

[0036] Figure 26 A of FIG. 1 is a schematic cross-sectional view used to describe a first example of a resonator structure. Figure 26 B of FIG. 1 is a schematic cross-sectional view used to describe a second example of a resonator structure.

[0037] Figure 27 A of FIG. 2 is a schematic cross-sectional view used to describe a third example of a resonator structure. Figure 27 B of FIG. 2 is a schematic cross-sectional view used to describe a fourth example of a resonator structure.

[0038] Figure 28 A of FIG. 3 is a schematic cross-sectional view used to describe a fifth example of a resonator structure. Figure 28 B of FIG. 3 is a schematic cross-sectional view used to describe a sixth example of a resonator structure.

[0039] Figure 29 is a schematic cross-sectional view used to describe a seventh example of a resonator structure.

[0040] Figure 30 A of FIG. 4 is a front view of a digital camera. Figure 30 B of FIG. 4 is a rear view of the digital camera.

[0041] Figure 31 is a perspective view of a head-mounted display.

[0042] Figure 32 is a perspective view of a television device.

[0043] Figure 33 is a perspective view of a perspective head-mounted display.

[0044] Figure 34 is a perspective view of a smartphone.

[0045] Figure 35 A of FIG. 1 is a view showing an internal state of a vehicle viewed from a rear side to a front side of the vehicle. Figure 35 B of FIG. 1 is a view showing an internal state of a vehicle viewed from an oblique rear side to an oblique front side of the vehicle. DETAILED DESCRIPTION

[0046] Embodiments of the present disclosure will be described in the following order.

[0047] 1. Outline of a display device according to the present disclosure

[0048] 2. Background leading to creation of embodiments of the present disclosure

[0049] 3. One embodiment (example of a display device)

[0050] 4. Modified examples

[0051] 5. Example of a leak prevention structure

[0052] 6. Example of a resonator structure

[0053] 7. Application example (example of an electronic device)

[0054] Embodiments described below are preferred specific examples of the present disclosure, and the content of the present disclosure is not limited to these embodiments. Note that in the following description, components having substantially the same function configuration will be denoted by the same reference numerals and characters, and redundant description thereof will be omitted as appropriate. Furthermore, in order to prevent the illustration from being complicated, only some of the components can be denoted by reference numerals and characters, or the illustration can be simplified or increased or decreased in size.

[0055] <1. Outline of a display device according to the present disclosure>

[0056] A display device according to the present disclosure includes a plurality of light emitting elements arranged two-dimensionally, a plurality of layers stacked on the plurality of light emitting elements, and a partition wall arranged between adjacent light emitting elements when viewed in plan and formed on two or more layers included in the plurality of layers, in which a cross-sectional shape of the partition wall includes a right pyramid shape.

[0057] As described above, since the cross-sectional shape of the partition wall includes a right conical shape, the angle of incidence of light incident on the side surface of the partition wall from each light emitting element increases, and the light can be totally reflected on the side surface of the partition wall. Further, because the partition wall is formed on two or more layers, the amount of light leaking from above and / or below the partition wall to the adjacent pixel can be reduced. Thus, the light leakage between the adjacent pixels can be prevented. In this specification, the term “and / or” means “at least one of”, and for example, in the case where the term is used for the phrase “X and / or Y”, the phrase means three cases of “only X”, “only Y”, and “X and Y”.

[0058] In the display device according to the present disclosure, the refractive index of the partition wall is preferably lower than the refractive index of two or more layers included in the plurality of layers. This allows light emitted from each light emitting element to the wide-angle side to be totally reflected at the interface between the partition wall and any of the two or more layers.

[0059] In the display device according to the present disclosure, the plurality of layers can include, in order on the plurality of light emitting elements, a protective layer, a color filter, and a sealing resin layer. In this case, the two or more layers included in the plurality of layers preferably include the protective layer and the color filter. This allows light emitted from each light emitting element to the wide-angle side to be totally reflected at the interface between the partition wall and each of the protective layer and the color filter.

[0060] In the display device according to the present disclosure, the plurality of layers can include, in order on the plurality of light emitting elements, a protective layer, a first resin layer, a color filter, and a sealing resin layer. In this case, the two or more layers included in the plurality of layers preferably include the protective layer, the first resin layer, and the color filter. This allows light emitted from each light emitting element to the wide-angle side to be totally reflected at the interface between the partition wall and each of the protective layer, the first resin layer, and the color filter. The first resin layer can be a first planarization layer.

[0061] In the display device according to the present disclosure, the plurality of layers can include, in order on the plurality of light emitting elements, a protective layer, a first resin layer, a color filter, a second resin layer, a lens array, and a sealing resin layer. In this case, the two or more layers included in the plurality of layers preferably include the protective layer, the first resin layer, the color filter, and the second resin layer. This allows total reflection at the interface between the partition wall and each of the protective layer, the first resin layer, the color filter, and the second resin layer. The first resin layer and the second resin layer can be a first planarization layer and a second planarization layer, respectively.

[0062] In the display device according to the present disclosure, the refractive index of the partition wall is preferably the same as the refractive index of the sealing resin layer. This makes it possible to form the partition wall and the sealing resin layer using the same material, and thus prevents an increase in the type of material required to manufacture the display device.

[0063] In the display device according to the present disclosure, the sealing resin layer is in contact with the top of the partition wall, and the refractive index of the partition wall is preferably lower than the refractive index of the sealing resin layer. This allows light emitted from each light emitting element to be refracted and bent in the front direction at the interface between the top of the partition wall and the sealing resin layer. Thus, the light extraction efficiency in the front direction can be improved.

[0064] In the display device according to the present disclosure, the top of the partition wall is preferably positioned at a position higher than the color filter with respect to each light emitting element from the viewpoint of preventing light from leaking from above the partition wall to an adjacent pixel.

[0065] In the display device according to the present disclosure, the plurality of light emitting elements can include an organic-containing layer containing an organic light emitting layer, and the organic-containing layer can be continuous between adjacent light emitting elements. In this case, the bottom of the partition wall is preferably embedded in the protective layer from the viewpoint of preventing light from leaking from below the partition wall to an adjacent pixel.

[0066] In the display device according to the present disclosure, in the case where the plurality of light emitting elements include an organic-containing layer containing an organic light emitting layer, and the organic-containing layer is continuous between adjacent light emitting elements, the protective layer preferably has a surface on the light emitting element side, and the bottom of the partition wall is separated from the surface. Thereby, it is possible to prevent a layer containing an organic substance from being exposed without being covered by the protective layer between adjacent light emitting elements. Thus, it is possible to prevent deterioration of the protective function of the protective layer for the organic-containing layer.

[0067] In the display device according to the present disclosure, the height of the top of the partition wall is preferably consistent with the height of the bottom surface of each lens included in the lens array. This makes it possible to prevent a layer covering the light condensing surface of the lens from changing from the partition wall to the sealing resin layer in the middle, thereby preventing deterioration of the lens function. Furthermore, it is possible to prevent light from leaking from above the partition wall to an adjacent pixel.

[0068] In the display device according to the present disclosure, the bottom of the partition wall is preferably provided at a position that does not overlap with the light emitting region of each light emitting element in plan view. Thus, it is possible to prevent light emitted from the light emitting element to the wide angle side from being reflected by the bottom of the partition wall and becoming stray light.

[0069] The display device according to the present disclosure can be provided in an electronic device. For example, the display device according to the present disclosure can be provided in a goggle device such as a virtual reality (VR) device, a mixed reality (MR) device, or an augmented reality (AR) device, or can be provided in an electronic viewfinder (EVF), a small projector, or the like.

[0070] In the present disclosure, a positive taper shape refers to a shape in which the width of the partition wall narrows from the lowermost layer (a layer on the light emitting element side) among the plurality of layers stacked on the plurality of light emitting elements toward the uppermost layer (a layer on the side opposite to the light emitting element side).

[0071] In the present disclosure, the cross-sectional shape of the partition wall only needs to include a positive taper shape, and the cross-sectional shape of a portion of the partition wall in the thickness direction of the display device can be a positive taper shape, or the cross-sectional shape of the entire partition wall can be a positive taper shape.

[0072] In the present disclosure, a positive taper includes a linear taper in which the width of the partition wall changes linearly with respect to the height of the partition wall and the inclination angle of the side surface of the partition wall is constant, and a nonlinear taper in which the width of the partition wall changes nonlinearly with respect to the height of the partition wall and the inclination angle of the side surface of the partition wall changes. The nonlinear taper is, for example, an exponential taper or a parabolic taper.

[0073] In the present disclosure, expressions such as "on a plurality of light emitting elements, a plurality of layers include, in order, a protective layer, a color filter, and a sealing resin layer", "on a plurality of light emitting elements, a plurality of layers include, in order, a protective layer, a first resin layer, a color filter, and a sealing resin layer", and "on a plurality of light emitting elements, a plurality of layers include, in order, a protective layer, a first resin layer, a color filter, a second resin layer, a lens array, and a sealing resin layer" each indicate the relative positional relationship of the layers. The expression includes not only a state in which each layer is in direct contact with another layer without inserting any layer therebetween, but also a state in which each layer is not in direct contact with another layer but another layer is inserted therebetween.

[0074] In the present disclosure, "on" in an expression such as "providing object B on object A" indicates the relative positional relationship between object A and object B. The term "on" includes not only a state in which object B is directly on object A without inserting other objects therebetween, but also a state in which object B is on object A with at least one other object inserted therebetween.

[0075] In the present disclosure, the refractive index of each of various members such as the partition wall, the filling resin layer, and the lens each indicates the refractive index with respect to light having a wavelength of 589.3 nm (D line of sodium).

[0076] <2 Background leading to creation of embodiments of the present disclosure>

[0077] An organic light emitting diode (OLED) display device is also deployed into an AR head-mounted device, a VR head-mounted device, and the like, and needs higher resolution and higher brightness.

[0078] (Increase in resolution of display device)

[0079] As Figure 1As shown, the conventional OLED display device 601 includes a drive substrate 611, a plurality of light emitting elements 612, an insulating layer 613, a protective layer 614, a filling resin layer 615, a color filter 616F, and a glass substrate 617. Each light emitting element 612 includes a first electrode 621, an OLED layer 622, and a second electrode 623. The color filter 616F includes a red colored layer 616R, a green colored layer 616G, and a blue colored layer 616B.

[0080] The sub-pixel 610R includes a light emitting element 612 and a colored layer 616R provided above the light emitting element 612. The sub-pixel 610G includes a light emitting element 612 and a colored layer 616G provided above the light emitting element 612. The sub-pixel 610B includes a light emitting element 612 and a colored layer 616B provided above the light emitting element 612. In the following description, the sub-pixels 610R, 610G, and 610B can be referred to as sub-pixels 610 and collectively referred to as sub-pixels 610 when they are not particularly distinguished. Further, the colored layer 616R, the colored layer 616G, and the colored layer 616B can be simply referred to as colored layers 616 when they are collectively referred to without being particularly distinguished.

[0081] In the above-described display device 601, since the glass substrate 617 on which the color filter 616F is formed is adhered to the drive substrate 611 by the filling resin layer 615, the distance D between the OLED layer 622 and the color filter 616F is long. For this reason, in the case where the resolution of the display device 601 of this type is increased and the pitch of the sub-pixels 610 is narrowed, there is a problem that the light L emitted from the OLED layer 122 of a predetermined sub-pixel (self-pixel) 610 can leak to an adjacent sub-pixel 610.

[0082] Therefore, in view of the above-described problem, as Figure 2 shown, a display device 602 in which the color filter 616F is provided on the drive substrate 611 side has been proposed. In the display device 602, since the distance D between the OLED layer 122 and the color filter 16 can be close to each other, it is possible to prevent the light from leaking to the adjacent sub-pixel 610. This makes it possible to prevent color mixing and to improve the viewing angle characteristics. Note that, in the display device 602, the color filter 616F is provided on the drive substrate 611 side. Figure 1 and Figure 2 In the display device 602, the color filter 616F is provided on the drive substrate 611 side. Therefore, the distance D between the OLED layer 122 and the color filter 616F can be close to each other. This makes it possible to prevent the light from leaking to the adjacent sub-pixel 610. This makes it possible to prevent color mixing and to improve the viewing angle characteristics.

[0083] (Techniques for increasing the luminance of a display device)

[0084] The increase in the luminance of a display device is an important requirement since it also contributes to the increase in the life of the display device and low power consumption. Therefore, as Figure 3As shown, a display device 603 is proposed in which the color filter 616F is provided on the side of the drive substrate 611 and a lens 618 is provided for each sub-pixel 610. In the display device 603, the light L emitted from the OLED layer 122 of each sub-pixel 610 is condensed by the lens 618, and the extraction efficiency of the light L in the front direction can be enhanced to achieve higher brightness.

[0085] (Problem of the display device 603)

[0086] However, even in the case where the color filter 616F is provided on the side of the drive substrate 611, as shown in FIG. 6B, there is no small amount of light LI leaking from the predetermined sub-pixel (own pixel) 610 to the adjacent sub-pixel 610. Such light LI not only can be extracted in the front direction, but also can cause color mixing. Figure 4

[0087] Further, in the display device 603, as shown in FIG. 6C, the gap GP is not depicted between the adjacent lenses 618, but when the lenses 618 are actually formed, the gap GP is usually formed between the adjacent lenses 618, as shown in FIG. 6D. Figure 3 Figure 4 Because the light L2 incident on each gap GP is not condensed in the front direction, it is difficult to sufficiently improve the extraction efficiency of the light L in the front direction in the display device 603 in which the gap GP is formed.

[0088] As described above, even in the display device 603, there is no small amount of light LI and light L2, which do not enter the colored layer 616 and the lens 618 of the own pixel (sub-pixel), and there is room for improvement in the light leakage and light condensing properties between the sub-pixels.

[0089] Therefore, the present inventors have extensively conducted research for improving the light leakage and light condensing properties between the sub-pixels. As a result, the display device 101 according to one embodiment described below has been found.

[0090] <3 One Embodiment>

[0091] [Configuration of the display device 101]

[0092] Figure 5 is a plan view of the display device 101 according to one embodiment. The display device 101 includes a display region RE1 and a peripheral region RE2 provided around the display region RE1.

[0093] ​​In this specification, a first direction and a second direction orthogonal to each other on a display surface of the display device 101 will be referred to as an X-axis direction and a Y-axis direction, respectively, and a third direction perpendicular to the display surface of the display device 101 will be referred to as a Z-axis direction. In one embodiment, an example in which the X-axis direction is a horizontal direction of the display surface and the Y-axis direction is a vertical direction of the display surface will be described.

[0094] In one embodiment, an example in which the display device 101 is a top emission type display device will be described, but the type of the display device 101 is not limited to this example. The display device 101 can be a micro display. From the viewpoint of high definition of the display device 101, the pixel pitch of each sub-pixel 10 is preferably 10 µm or less.

[0095] Figure 6 is an enlarged cross-sectional view of a display region RE1 of the display device 101. A plurality of sub-pixels 10R, 10G, and 10B are two-dimensionally arranged in a prescribed arrangement pattern in the display region RE1. The prescribed arrangement pattern can be a stripe arrangement, a mosaic arrangement, a square arrangement, a triangular arrangement, or an arrangement other than these. A pad portion 113, a video display driver (not shown), and the like are provided in a peripheral region RE2. A flexible printed circuit (FPC) (not shown) can be connected to the pad portion 113.

[0096] The sub-pixel 10R can emit red light (first light). The sub-pixel 10G can emit green light (second light). The sub-pixel 10B can emit blue light (third light). In the following description, in a case where the sub-pixels 10R, 10G, and 10B are not particularly distinguished and they are collectively referred to as sub-pixels 10, the sub-pixels 10R, 10G, and 10B can be simply referred to as sub-pixels 10. A pixel includes, for example, a plurality of adjacent sub-pixels 10R, 10G, and 10B. However, the configuration of one pixel is not limited to this example, and, for example, one pixel can include a plurality of adjacent sub-pixels 10R, 10G, 10B, and 10B.

[0097] [Layer Configuration of Display Device 101]

[0098] As shown in Figure 6 , the display device 101 includes a drive substrate 11, a plurality of light emitting elements 12, an insulating layer 13, a protective layer 14, a planarization layer 15, a color filter 16, a planarization layer 17, a lens array 18, a partition wall 19, and a sealing resin layer 20. The protective layer 14, the planarization layer 15, the color filter 16, the planarization layer 17, the lens array 18, and the sealing resin layer 20 are examples of a plurality of layers stacked on the plurality of light emitting elements 12.

[0099] In this specification, one of two faces of each layer constituting the display device 101 on the display surface side (upper side) of the display device 101 can be referred to as a first surface (upper surface), and a face on the side opposite to the display surface of the display device 101 (bottom side) can be referred to as a second surface (bottom surface). In this specification, a peripheral edge portion of the first surface means a region having a predetermined width from the peripheral edge of the first surface toward the inside. In this specification, plan view means a view when an object is observed from a direction perpendicular to the first surface or the second surface.

[0100] (Driver substrate 11)

[0101] The driver substrate 11 is a so-called back sheet and can drive a plurality of light emitting elements 12. For example, the driver substrate 11 includes a substrate 111 and an insulating layer 112 in this order.

[0102] A plurality of drive circuits (not shown) and the like are provided on the first surface side of the substrate 111. The substrate 111 can be, for example, a semiconductor substrate in which a transistor and the like can be easily formed, or can be a glass substrate or a resin substrate having low moisture permeability and oxygen permeability. The semiconductor substrate includes, for example, amorphous silicon, polycrystal silicon, single crystal silicon, and the like. The glass substrate includes, for example, high strain point glass, soda glass, borosilicate glass, forsterite, lead glass, quartz glass, and the like. For example, the resin substrate includes at least one selected from the group including polymethyl methacrylate, polyvinyl alcohol, polyvinyl phenol, polyether sulfone, polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, and the like.

[0103] The insulating layer 112 is provided on the first surface of the substrate 111 and covers a plurality of drive circuits and the like. The insulating layer 112 includes a plurality of contact plugs 112b and 112g and a plurality of wires 112a therein. The plurality of contact plugs 112b and 112g and the wires 112a electrically connect the light emitting elements 12 and the drive circuits. The contact plugs 112b and 112g include, for example, at least one metal selected from the group including copper (Cu), titanium (Ti), and the like.

[0104] The insulating layer 112 is, for example, an organic insulating layer, an inorganic insulating layer, or a multilayer body thereof. The organic insulating layer includes, for example, at least one selected from the group including polyimide resin, acrylic resin, novolak resin, and the like. For example, the inorganic insulating layer contains at least one selected from the group including silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and the like.

[0105] (Light emitting element 12)

[0106] The light emitting elements 12 can emit white light under the control of a driving circuit or the like. In one embodiment, each light emitting element 12 is an organic light emitting diode element (OLED element). The light emitting elements 12 are included in each of the subpixels 10R, 10G, and 10B of each color.

[0107] The plurality of light emitting elements 12 are two-dimensionally arranged on the first surface of the driving substrate 11 in a predetermined arrangement pattern. The prescribed arrangement pattern is as described for the prescribed arrangement pattern of the plurality of subpixels 10. The light emitting elements 12 each include a first electrode 121, an OLED layer 122, and a second electrode 123 in this order on the first surface of the driving substrate 11.

[0108] The first electrode 121

[0109] Each first electrode 121 is provided on the second surface side of the OLED layer 122. The first electrode 121 is a separate electrode provided separately in each of the plurality of light emitting elements 12. That is, the first electrode 121 is divided between the light emitting elements 12 adjacent in the in-plane direction of the first surface of the driving substrate 11. The first electrode 121 is an anode. When a voltage is applied between the first electrode 121 and the second electrode 123, holes are injected from the first electrode 121 into the OLED layer 122.

[0110] The first electrode 121 can be configured using, for example, a metal layer, or can be configured using a metal layer and a transparent conductive oxide layer. In the case where the first electrode 121 includes a metal layer and a transparent conductive oxide layer, the transparent conductive oxide layer is preferably provided on the OLED layer 122 side from the viewpoint of arranging a layer having a high work function adjacent to the OLED layer 122.

[0111] The metal layer can function as a reflective layer that reflects light L emitted from the OLED layer 122. For example, the metal layer includes at least one metal element selected from the group including 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 can contain the at least one metal element described above as a constituent element of an alloy. Specific examples of the alloy include aluminum alloys and silver alloys. Specific examples of the aluminum alloys include AlNd and AlCu.

[0112] A base layer (not shown) can be provided adjacent to the second surface side of the metal layer. The base layer can improve the crystal orientation of the metal layer when the metal layer is formed. The base layer includes, for example, at least one metal element selected from the group including titanium (Ti) and tantalum (Ta). The base layer can contain the at least one metal element described above as a constituent element of an alloy.

[0113] The transparent conductive oxide layer includes a transparent conductive oxide. For example, the transparent conductive oxide includes at least one selected from the group including an indium-containing transparent conductive oxide (hereinafter, referred to as "indium-based transparent conductive oxide"), a tin-containing transparent conductive oxide (hereinafter, referred to as "tin-based transparent conductive oxide"), and a zinc-containing transparent conductive oxide (hereinafter, referred to as "zinc-based transparent conductive oxide").

[0114] The indium-based transparent conductive oxide includes, for example, indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium gallium zinc oxide (IGZO), or fluorine-doped indium oxide (IFO). Among these transparent conductive oxides, indium tin oxide (ITO) is particularly preferable. Indium tin oxide (ITO) has particularly low barrier potential functionally to the hole-injection OLED layer 122, so that the driving voltage of the display device 101 can be particularly reduced. The tin-based transparent conductive oxide includes, for example, tin oxide, antimony-doped tin oxide (ATO), or fluorine-doped tin oxide (FTO). The zinc-based transparent conductive oxide includes, for example, zinc oxide, aluminum-doped zinc oxide (AZO), boron-doped zinc oxide, or gallium-doped zinc oxide (GZO).

[0115] (OLED layer 122)

[0116] The OLED layer 122 can emit white light. The OLED layer 122 is an example of an organic layer-containing layer including an organic light-emitting layer. The OLED layer 122 is provided between the plurality of first electrodes 121 and one second electrode 123. The OLED layer 122 is continuous between the adjacent light-emitting elements 12 in the in-plane direction of the first surface of the drive substrate 11, and is a layer shared by the plurality of light-emitting elements 12.

[0117] The OLED layer 122 can include a multilayer body including an organic light-emitting layer, and in this case, a part (for example, an electron injection layer) of the multilayer body can be an inorganic layer. As Figure 7 As shown in A of FIG. 1, the OLED layer 122 can be an OLED layer having a single-layer light-emitting unit U, as Figure 7The OLED layer 122 including the single light emitting unit U can have, for example, a configuration in which a hole injection layer 1221, a hole transport layer 1222, a red light emitting layer 1220R, a light emitting separation layer 1223, a blue light emitting layer 1220B, a green light emitting layer 1220G, an electron transport layer 1224, and an electron injection layer 1225 are stacked in this order from the first electrode 121 toward the second electrode 123. The OLED layer including the two light emitting units U1 and U2 can have, for example, a configuration in which a hole injection layer 1221, a hole transport layer 1222, a blue light emitting layer 1220B, an electron transport layer 1226, a charge generation layer 1227, a hole transport layer 1228, a yellow light emitting layer 1220Y, an electron transport layer 1224, and an electron injection layer 1225 are sequentially stacked from the first electrode 121 toward the second electrode 123.

[0118] The hole injection layer 1221 can improve efficiency of injecting holes into the light emitting layers 1220R, 1220G, 1220B, and prevent leakage. The hole transport layers 1222, 1228 can improve hole transport efficiency to the light emitting layers 1220R, 1220B, 1220Y. The electron injection layer 1225 can improve efficiency of injecting electrons into the light emitting layers 1220G, 1220Y. The electron transport layers 1224, 1226 can enhance efficiency of electron transport to the light emitting layers 1220G, 1220B, 1220Y. The light emitting separation layer 1223 is a layer for adjusting carrier injection into the light emitting layers 1220R, 1220G, 1220B, and adjusts a light emitting balance of each color by injecting electrons or holes into the light emitting layers 1220R, 1220G, 1220B through the light emitting separation layer 1223. The charge generation layer 1227 can supply electrons and holes to the blue light emitting layer 1220B and the yellow light emitting layer 1220Y, which are disposed to sandwich the charge generation layer 1227.

[0119] In response to an electric field applied to each of the red light emitting layer 1220R, the green light emitting layer 1220G, the blue light emitting layer 1220B, and the yellow light emitting layer 1220Y, the holes injected from the first electrode 121 or the charge generation layer 1227 and the electrons injected from the second electrode 123 or the charge generation layer 1227 recombine, and red light, green light, blue light, and yellow light can be emitted.

[0120] The second electrode 123

[0121] The second electrode 123 is provided on the first surface side of the OLED layer 122. The second electrode 123 is continuous between the light emitting elements 12 adjacent in the in-plane direction of the first surface of the drive substrate 11, and is an electrode shared by the plurality of light emitting elements 12.

[0122] The second electrode 123 is a cathode. When a voltage is applied between the first electrode 121 and the second electrode 123, electrons are injected from the second electrode 123 into the OLED layer 122. The second electrode 123 has semi-transparency with respect to white light emitted from the OLED layer 122. The second electrode 123 is preferably a transparent electrode having transparency with respect to visible light. In the present specification, visible light refers to light in a wavelength range of 360 nm or more and 780 nm or less.

[0123] In order to improve the light emitting efficiency, the second electrode 123 preferably includes a material having as high semi-transparency and a low work function as possible. The second electrode 123 is configured using, for example, at least one of a metal layer or a transparent conductive oxide layer. More specifically, the second electrode 123 includes a single layer film of a metal layer or a transparent conductive oxide layer, or a multi-layer film of a metal layer and a transparent conductive oxide layer. In the case where the second electrode 123 includes a multi-layer film, the metal layer can be provided on the OLED layer 122 side, or the transparent conductive oxide layer can be provided on the OLED layer 122 side, but from the viewpoint of providing a layer having a low work function adjacent to the OLED layer 122, the metal layer is preferably provided on the OLED layer 122 side.

[0124] For example, the metal layer includes at least one metal element selected from the group including magnesium (Mg), aluminum (Al), silver (Ag), calcium (Ca), and sodium (Na). The metal layer can contain the at least one metal element described above as a constituent element of an alloy. Specific examples of the alloy include MgAg alloy, MgAl alloy, AlLi alloy, and the like. The transparent conductive oxide layer includes a transparent conductive oxide. As the transparent conductive oxide, a material similar to the transparent conductive oxide of the first electrode 121 described above can be exemplified.

[0125] (insulating layer 13)

[0126] The insulating layer 13 is provided on the first surface of the drive substrate 11 in portions between the first electrodes 121 apart from each other. The insulating layer 13 is an insulating layer for isolating elements, and can insulate between the first electrodes 121 adjacent in the in-plane direction of the first surface of the drive substrate 11. The insulating layer 13 has a plurality of openings 13a. Each of the plurality of openings 13a is provided for a corresponding one of the light emitting elements 12. Each of the plurality of openings 13a can be provided on the first surface (the surface on the side of the OLED layer 122) of the corresponding one of the first electrodes 121. That is, the peripheral edge portion of the first surface of each of the first electrodes 121 can be covered with the insulating layer 13. The first electrodes 121 and the OLED layer 122 contact each other through the openings 13a. The planar shape of each of the openings 120 is not particularly limited, and is, for example, a substantially rectangular shape, a substantially circular shape, a substantially elliptical shape, or the like.

[0127] The insulating layer 13 is, for example, an organic insulating layer, an inorganic insulating layer, or a multilayer body thereof. The organic insulating layer includes, for example, at least one selected from the group including a polyimide resin, an acrylic resin, a novolak resin, and the like. The inorganic insulating layer contains, for example, at least one selected from the group including silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and the like.

[0128] (Protective layer 14)

[0129] The protective layer 14 is provided on the first surface of the second electrode 123 and covers the plurality of light emitting elements 12. The protective layer 14 has a semi-transparency with respect to white light emitted from the light emitting elements 12. The protective layer 14 can protect the plurality of light emitting elements 12 and the like. For example, the protective layer 14 can prevent moisture from the outside environment from entering the plurality of light emitting elements 12 and the like. Further, in the case where the second electrode 123 is configured using a metal layer, the protective layer 14 can have a function of preventing oxidation of the metal layer.

[0130] The protective layer 14 contains, for example, at least one of an inorganic material and an organic material having low moisture absorption. The protective layer 14 can have a single-layer structure or a multilayer structure. In the case where the thickness of the protective layer 14 is increased, the multilayer structure is preferable. This is to mitigate internal stress of the protective layer 14. The inorganic material contains, for example, at least one selected from the group including silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), titanium oxide (TiO x ), aluminum oxide (AlO xAt least one from the group consisting of, etc. For example, the organic material includes a cured product of at least one resin selected from the group consisting of thermosetting resin compositions and photosensitive resin compositions. The photosensitive resin composition includes, for example, an ultraviolet-curable resin composition. Specifically, the organic material includes, for example, at least one selected from the group consisting of acrylic resins, polyimide resins, phenolic varnish resins, epoxy resins, norbornene resins, parylene resins, etc.

[0131] The protective layer 14 preferably comprises a deposited layer on which atomic layers are deposited. The deposited layer may be an atomic layer deposition (ALD) layer. The inclusion of the deposited layer in the protective layer 14 improves its effectiveness in preventing moisture ingress. The protective layer 14 may comprise, for example, a metal oxide or a metal nitride. Metal oxides include, for example, aluminum oxide (Al₂O₃). x ) or titanium dioxide (TiO) x Metal nitrides include, for example, titanium nitride (TiN). x ).

[0132] (Planning layer 15)

[0133] A planarization layer 15 is disposed on a first surface of the protective layer 14. The planarization layer 15 is an example of a first resin layer. The planarization layer 15 can fill irregularities in the first surface of the protective layer 14 and forms a flat first surface over the protective layer 14. The planarization layer 15 is translucent to white light emitted from the light-emitting element 12. The planarization layer 15 comprises at least one of, for example, organic and inorganic materials.

[0134] Organic materials include, for example, cured products of photosensitive resin compositions. The photosensitive resin composition may comprise either a positive or negative photosensitive resin composition. Specifically, the photosensitive resin composition comprises, for example, at least one selected from the group consisting of polyimide, polyimide precursor, polybenzoxazole, polybenzoxazole precursor, acrylic resin, phenolic resin, siloxane resin, etc. As inorganic materials, materials similar to the inorganic material in protective layer 14 can be exemplified.

[0135] (Color Filter 16)

[0136] Color filter 16 is a so-called on-chip color filter (OCCF). Color filter 16 is disposed above a plurality of light-emitting elements 12. More specifically, color filter 16 is disposed on a first surface of planarization layer 15. Color filter 16 includes, for example, a plurality of colored layers 160R, a plurality of colored layers 160G, and a plurality of colored layers 160B. Note that in the following description, unless otherwise specifically distinguished, colored layers 160R, colored layers 160G, and colored layers 160B are collectively referred to as colored layers 160R, colored layers 160G, and colored layers 160B, and can simply be referred to as colored layer 160.

[0137] The plurality of colored layers 160 is arranged two-dimensionally on the first surface of the planarization layer 15 in a prescribed arrangement pattern. The prescribed arrangement pattern is as described for the prescribed arrangement pattern of the plurality of sub-pixels 10. Each colored layer 160 is provided above the light emitting element 12. Each sub-pixel 10R includes the light emitting element 12 and the colored layer 160R provided above the light emitting element 12. Each sub-pixel 10G includes the light emitting element 12 and the colored layer 160G provided above the light emitting element 12. Each sub-pixel 10B includes the light emitting element 12 and the colored layer 160B provided above the light emitting element 12.

[0138] Each colored layer 160R has a red color. The colored layer 160R can absorb visible light components other than red light, while transmitting a red light component in white light emitted from the light emitting element 12. Each colored layer 160G has a green color. The colored layer 160G can absorb visible light components other than green light, while transmitting a green light component in white light emitted from the light emitting element 12. Each colored layer 160B has a blue color. The colored layer 160B can absorb visible light components other than blue light, while transmitting a blue light component in white light emitted from the light emitting element 12.

[0139] Each colored layer 160R includes, for example, a red resist. Each colored layer 160G includes, for example, a green resist. Each colored layer 160B includes, for example, a blue resist.

[0140] (planar layer 17)

[0141] The planarization layer 15 is provided on the first surface of the color filter 16. The planarization layer 15 is an example of a second resin layer. The planarization layer 17 can fill irregularities of the first surface of the color filter 16 and form a planar first surface above the upper side of the color filter 16. The planarization layer 17 has translucency with respect to red light, green light, and blue light emitted from the color filter 16. As a material of the planarization layer 17, a material similar to the material of the planarization layer 15 can be exemplified.

[0142] (lens array 18)

[0143] The lens array 18 is provided on the first surface of the planarization layer 17. The lens array 18 includes a plurality of lenses 181. Each lens 181 can collect light L that is emitted upward from the light emitting element 12 and that is incident on the lens 181 through the colored layer 160 in the front direction. Further, the lens 181 can converge light L that is emitted in the oblique direction from the light emitting element 12, is reflected by the side surface of the partition wall 19, and then is incident on the lens 181 in the front direction. The lens 181 is a convex lens having a convex light collecting surface on the side opposite to the side of the light emitting element 12. The lens 181 is a so-called on-chip microlens (OCL). The plurality of lenses 181 are two-dimensionally arranged on the first surface of the planarization layer 17 in a prescribed arrangement pattern. The prescribed arrangement pattern is as described for the prescribed arrangement pattern of the plurality of sub-pixels 10. In plan view, the center of each lens 181 substantially coincides with the center of the light emitting region of the light emitting element 12. A gap is provided between adjacent lenses 181. In one embodiment, an example in which a gap is provided between adjacent lenses 181 will be described, but it is not necessary to provide a gap between adjacent lenses 181.

[0144] The light collecting surface of each lens 181 preferably has a convex curved surface shape. Examples of the convex curved surface shape include, but are not limited to, for example, a substantially parabolic shape and a substantially hemispherical shape. Here, the substantially parabolic shape or the substantially hemispherical shape is not limited to a parabolic shape or a hemispherical shape in a strict sense, and includes such a shape that is visually recognized as being close to a parabolic shape or a hemispherical shape. For example, a parabolic shape or a hemispherical shape that is twisted or deformed within a range of tolerance, error, or the like is included.

[0145] The refractive index n1 of each lens 181 is higher than the refractive index n2 of the sealing resin layer 20. Due to the refractive index n1 of the lens 181 being higher than the refractive index n2 of the sealing resin layer 20, light L can be refracted and converged at the interface between the lens 181 and the sealing resin layer 20. Thus, the light extraction function can be improved.

[0146] Each lens 181 includes, for example, an organic material or an inorganic material that is transparent with respect to visible light. The organic material includes, for example, a cured product of a photosensitive resin composition such as an ultraviolet-curable resin composition. The inorganic material includes, for example, at least one selected from the group including silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and the like. The lens 181 can include a filler. The refractive index n1 of the lens 181 can be adjusted by adjusting the content of the filler contained in the lens 181. The filler can be a hollow filler. The filler can be an inorganic filler. The inorganic filler includes, for example, at least one selected from the group including aluminum oxide (AlO x ), titanium oxide (TiO x ), zirconium oxide (ZrO xat least one of a group consisting of a phosphor such as YAG:Ce, a fluorescent material such as BaMg2Al16O27:Eu, and a fluorescent material such as (Ba,Sr)2Si5N8:Eu.

[0147] (separation wall 19)

[0148] Each separation wall 19 is configured to be capable of reflecting light emitted from the light emitting element 12 on the side surface. The separation wall 19 is substantially parallel to an axis (Z axis) extending in the thickness direction of the display device 101. The cross-sectional shape of the separation wall 19 is a right circular cone. In the case where the cross-sectional shape of the separation wall 19 is a right circular cone, the incident angle of the light L incident on each side surface of the separation wall 19 from the light emitting element 12 increases, and the light L can be totally reflected on the side surface of the separation wall 19. Therefore, the light L incident to the side surface of the separation wall 19 from the light emitting element 12 is difficult to leak to the adjacent sub-pixel 10, and color mixing can be prevented. Further, because the amount of light entering each lens 181 can be increased, the extraction efficiency of the light L in the front direction can be improved.

[0149] In a plan view, each separation wall 19 is arranged between the adjacent light emitting elements 12. More specifically, for example, in a plan view, the separation wall 19 is provided at least one of a position between the adjacent light emitting elements 12 in the X axis direction and a position between the adjacent light emitting elements 12 in the Y axis direction. The separation wall 19 can be provided to surround each light emitting element 12.

[0150] Each separation wall 19 is preferably formed above the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17. Because the separation wall 19 is formed in this way on the plurality of layers, the amount of light reflected on the side surface of the separation wall 19 can be increased.

[0151] The bottom of the separation wall 19 is preferably embedded in the protective layer 14, which is the lowermost layer of the multilayer film on the plurality of light emitting elements 12. Therefore, it is possible to configure the bottom of the separation wall 19 in the vicinity of the light emitting element 12, and the light L emitted from the light emitting element 12 to the wide angle side is difficult to leak from the lower side of the separation wall 19 to the adjacent sub-pixel 10.

[0152] The bottom of the separation wall 19 is preferably separated from the second surface (the surface on the light emitting element 12 side) of the protective layer 14. This makes it possible to prevent the OLED layer 122 from being exposed without being covered by the protective layer 14 between the adjacent light emitting elements 12. Therefore, it is possible to prevent the deterioration of the protective function of the protective layer 14 for the OLED layer 122. From the viewpoint of preventing the deterioration of the protective function of the protective layer 14 for the OLED layer 122, the distance from the second surface of the protective layer 14 to the bottom of the separation wall 19 (the thickness of the protective layer 14 at the bottom of the separation wall 19) is preferably 0.5 μm or more.

[0153] The bottom of the partition wall 19 is preferably provided at a position that does not overlap the light emitting region of the light emitting element 12 in plan view. This makes it possible to prevent light L emitted from each light emitting element 12 toward the wide-angle side from being reflected by the bottom portion of the partition wall 19 and becoming stray light.

[0154] The top of each partition wall 19 is preferably positioned at a position higher than the color filter 16 with respect to the light emitting element 12, and more preferably coincides in height with the bottom surface of the lens 181 included in the lens array 18.

[0155] Since the top of the partition wall 19 is positioned at a position higher than the color filter 16 with respect to the light emitting element 12, light L emitted from each light emitting element 12 toward the wide-angle side is less likely to leak from the top of the partition wall 19 toward the adjacent sub-pixel 10, and color mixing can be prevented. Furthermore, since the amount of light entering each lens 181 can be increased, the extraction efficiency of the light L in the front direction can be improved.

[0156] Since the top of the partition wall 19 coincides in height with the lower surface of the lens 181, light L emitted from each light emitting element 12 toward the wide-angle side is less likely to leak from the top of the partition wall 19 toward the adjacent sub-pixel 10, and the following effects can be obtained. That is, it is possible to prevent a layer covering the condensing surface of the lens 181 from changing from the partition wall 19 to the sealing resin layer 20 from the middle, and it is possible to prevent deterioration of the function of the lens 181.

[0157] The top of each partition wall 19 can be positioned between adjacent lenses 181 in plan view. In this case, the top of the partition wall 19 is preferably in contact with the sealing resin layer 20. Thereby, the top of the partition wall 19 is positioned at a relatively high position with respect to the light emitting element 12, light L emitted from each light emitting element 12 toward the wide-angle side is less likely to leak from the top of the partition wall 19 toward the adjacent sub-pixel 10, and color mixing can be prevented.

[0158] The refractive index n3 of each partition wall 19 is preferably lower than the refractive index of any of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 that is in contact with the side surface of the partition wall 19. In this case, light emitted from each light emitting element 12 can be totally reflected at the interface between the partition wall 19 and each of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17.

[0159] The refractive index n3 of the partition wall 19 is preferably the same as the refractive index n2 of the sealing resin layer 20. In the case where the refractive index n3 of the partition wall 19 is the same as the refractive index n2 of the sealing resin layer 20, the partition wall 19 and the sealing resin layer 20 can be formed of the same material, making it possible to prevent an increase in the types of materials required to manufacture the display device 101.

[0160] To prevent a decrease in luminance due to light absorption by each partition wall 19, the partition wall 19 preferably has translucency with respect to white light emitted from the light emitting element 12. However, the optical property of the partition wall 19 is not limited thereto, and can have non-translucency with respect to white light emitted from the light emitting element 12.

[0161] The partition wall 19 is composed of an organic material or an inorganic material. The organic material includes, for example, a cured product of a photosensitive resin composition such as an ultraviolet-curable resin composition. The inorganic material includes, for example, at least one selected from the group including silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), and the like. The partition wall 19 can include a filler. Adjusting the content of the filler contained in the partition wall 19 can adjust the refractive index n3 of the partition wall 19. The filler can be a hollow filler. The filler can be an inorganic filler. The inorganic filler includes, for example, at least one selected from the group including aluminum oxide (AlO x ), titanium oxide (TiO x ), zirconium oxide (ZrO x ), and the like.

[0162] (Sealing resin layer 20)

[0163] The sealing resin layer 20 covers the lens array 18. The sealing resin layer 20 can protect members such as the plurality of light emitting elements 12 from moisture, impact, and the like. The sealing resin layer 20 contains a cured product of a sealing resin composition. The sealing resin composition includes, for example, at least one selected from the group including a thermosetting resin composition, a photosensitive resin composition, and the like. The photosensitive resin composition includes, for example, an ultraviolet-curable resin composition. The sealing resin layer 20 can include a hard coat layer. In this case, properties such as scratch resistance and weather resistance of the display device 101 can be improved.

[0164] [Manufacturing method of display device 101]

[0165] (First example of method for manufacturing display device 101)

[0166] Hereinafter, a first example of a method for manufacturing the display device 101 according to one embodiment will be described with reference to Figure 8 to Figure 10

[0167] (Forming planarization layer 15)

[0168] First, a photosensitive resin composition is applied to the first surface of the color filter 16 by, for example, a spin coating method, and the resin composition is cured. As shown in Step (S1) of FIG. 8, this forms the planarization layer 17 on the first surface of the color filter 16. Figure 8

[0169] ​​(Step of forming the separation wall 19)

[0170] Next, as shown in step (S2) of FIG. 12, a silicon nitride (SiN Figure 8 x ) layer 31a is formed on the first surface of the planarization layer 17 by, for example, a chemical vapor deposition (CVD) method.

[0171] Next, as shown in step (S3) of FIG. 13, openings 31b are formed in portions of the silicon nitride layer 31a above the portions between the adjacent light emitting elements 12 by, for example, a dry etching process. This forms a hard mask 31. Figure 8

[0172] Next, as shown in step (S4) of FIG. 14, the planarization layer 17, the color filter 16, and the planarization layer 15 are sequentially processed by the hard mask 31 to form a groove 19a above the portions between the adjacent light emitting elements 12. As a method for processing the planarization layer 17, the color filter 16, and the planarization layer 15, for example, a dry etching process is used. The cross-sectional shape of the groove 19a is a right circular cone shape. Here, the right circular cone shape refers to a shape in which the width of the groove 19a decreases from the second surface (the surface on the light emitting element 12 side) of the planarization layer 15 toward the first surface (the surface on the opposite side of the light emitting element 12) of the planarization layer 17. Figure 9

[0173] Next, as shown in step (S5) of FIG. 15, the bottom of each groove 19a is dug down by, for example, etch-back to position the bottom of the groove 19a in the protective layer 14, and the hard mask 31 is removed. At this time, the processing of the groove 19a is preferably stopped before the second surface (the surface on the light emitting element 12 side) of the protective layer 14. This makes it possible to prevent degradation of the protective function of the protective layer 14 for the OLED layer 122. Figure 9

[0174] Next, a photosensitive resin composition is applied on the first surface of the planarization layer 17, the groove 19a is filled with the photosensitive resin composition, and then the photosensitive resin composition is cured by light irradiation. As shown in step (S6) of FIG. 16, a low-refractive-index resin layer 19b that fills the groove 19a is formed. The refractive index of the low-refractive-index resin layer 19b is preferably lower than the refractive index of any one of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 that constitute the side surface of each groove 19a. Figure 9 Figure 10 Next, as shown in step (S7) of FIG. 17, the entire first surface of the low-refractive-index resin layer 19b is processed by, for example, etch-back to expose the first surface of the planarization layer 17.

[0175] (Step of forming the lens array 18)

[0176] ​​​​​Next, a photosensitive resin composition as a lens material is applied to the first surface of the planarization layer 17 and cured by light irradiation to form a photosensitive resin layer as a lens material layer. Next, the photosensitive resin layer is patterned by, for example, a photolithography technique to form a plurality of columnar bodies on the first surface of the planarization layer 17. Next, the plurality of columnar bodies are processed into a convex curved surface shape by, for example, a reflow process (heating process) or etching back. As shown in step (S8) of Figure 10 , this forms a plurality of lenses 181 on the first surface of the planarization layer 17.

[0177] (Step of forming a sealing resin layer 20)

[0178] Next, as shown in step (S9) of Figure 10 , a sealing resin composition is applied to cover the plurality of lenses 181, and then cured to form a sealing resin layer 20. By the above steps, the display device 101 according to one embodiment is obtained.

[0179] (Second example of a method for manufacturing the display device 101)

[0180] Hereinafter, a second example of a method for manufacturing the display device 101 according to one embodiment will be described with reference to Figure 11 to Figure 13

[0181] (Step of forming a protective layer 14)

[0182] First, as shown in step (S1) of Figure 11 , a protective layer 14 is formed on the first surface of the second electrode 123 by, for example, a CVD method.

[0183] (Step of forming a partition wall 19)

[0184] Next, after forming a resist layer on the first surface of the protective layer 14, the resist layer is subjected to pattern exposure and then developed. As shown in step (S2) of Figure 11 , this forms a resist pattern 32 having an opening 32a on a portion between adjacent light emitting elements 12 on the first surface of the protective layer 14.

[0185] Next, the protective layer 14 is processed by the resist pattern 32 to form a groove 14a above a portion between adjacent light emitting elements 12, as shown in step (S3) of Figure 11 . As a method for processing the protective layer 14, for example, a dry etching process is used. The cross-sectional shape of the groove 19a is a right pyramid shape. Here, the right pyramid shape means a shape in which the width of the groove 19a decreases from the first surface (the surface on the light emitting element 12 side) of the protective layer 14 toward the second surface (the surface on the opposite side of the light emitting element 12). Next, the resist pattern 32 is removed from the first surface of the protective layer 14. ​

[0186] Next, as Figure 11 As shown in step (S4), a photosensitive resin composition is coated onto the first surface of the protective layer 14, the groove 14a is filled with the photosensitive resin composition, and then the photosensitive resin composition is cured by light irradiation to form a low refractive index resin layer 19c. Preferably, the refractive index of the low refractive index resin layer 19c is lower than the refractive index of the protective layer 14 constituting the sides of each groove 14a.

[0187] Next, after forming a resist layer on the first surface of the low-refractive-index resin layer 19c, the resist layer is patterned and then developed. Figure 12 As shown in step (S5), a resist pattern 33 with an opening 33a is formed on the portion between adjacent light-emitting elements 12 on the first surface of the low-refractive-index resin layer 19c.

[0188] Next, as Figure 12 In step (S6), the low-refractive-index resin layer 19c is treated with resist pattern 33 to expose the protective layer 14, thereby forming grooves 19d above each light-emitting element 12. At this time, the processing conditions are controlled such that the side surfaces of the grooves 14a and 19d are substantially aligned. This forms a partition wall 19 above the portion between adjacent light-emitting elements 12. The low-refractive-index resin layer 19c is processed, for example, using dry etching. Each groove 19d has an inverted conical shape. Here, the inverted conical shape refers to the shape in which the width of the groove 19d increases from the first surface (the surface on the side of the light-emitting element 12) of the low-refractive-index resin layer 19c toward the second surface (the surface on the opposite side of the light-emitting element 12). Next, the resist pattern 33 is removed from the upper part of the partition wall 19.

[0189] (Steps for forming planarization layer 15)

[0190] Next, for example, by an inkjet method, the photosensitive resin composition is coated onto the bottom of each groove 19d at the location forming sub-pixel 10R, the bottom of each groove 19d at the location forming sub-pixel 10G, and the bottom of each groove 19d at the location forming sub-pixel 10B. Then, the photosensitive resin composition is irradiated with ultraviolet light and cured to form a planarization layer 15.

[0191] (Steps for forming color filter 16)

[0192] Next, for example, using an inkjet printing method, red, green, and blue resists are applied to the bottom of each groove 19d at the location forming sub-pixel 10R, the bottom of each groove 19d at the location forming sub-pixel 10G, and the bottom of each groove 19d at the location forming sub-pixel 10B, respectively. Then, each color of resist is irradiated with ultraviolet light and cured. Figure 12As shown in step (S7), the red color layer 160R, the green color layer 160G, and the blue color layer 160B are formed in the grooves 19d all located at the positions where the sub-pixels 10R are formed, in the grooves 19d all located at the positions where the sub-pixels 10G are formed, and in the grooves 19d all located at the positions where the sub-pixels 10B are formed, respectively. That is, the color filter 16 is formed on the first surface of the planarization layer 15.

[0193] (Step of forming the planarization layer 17)

[0194] Next, a photosensitive resin composition is applied onto the first surface of the color filter 16 by, for example, a spin coating method, and each groove 19d is filled with the photosensitive resin composition. Next, as shown in step (S8), the photosensitive resin composition is irradiated with ultraviolet rays and cured to form the planarization layer 17. Figure 13 Figure 13 Next, as shown in step (S9), the entire first surface of the planarization layer 17 is processed by, for example, etching back to expose the top of the partition wall 19.

[0195] (Step of forming the lens array 18 and step of forming the sealing resin layer 20)

[0196] Since the step of forming the lens array 18 and the step of forming the sealing resin layer 20 are similar to those in the first example of the method for manufacturing the display device 101, the description thereof will be omitted. Through the above steps, the display device 101 according to one embodiment is obtained.

[0197] [Effects and advantages]

[0198] In the display device 101 according to one embodiment, each partition wall 19 is arranged between the adjacent light emitting elements 12 in plan view, and is formed above the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17. As shown in step (S7), this causes a wide-angle component of the light L emitted from each OLED layer 122 to be totally reflected at the interface between the partition wall 19 and each of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17. The wide-angle component light L of the total reflection is incident on the lens 181 of each sub-pixel 10 as a self-pixel, and is condensed in the front direction by the lens 181. Figure 6

[0199] Further, in the display device 101 according to one embodiment, the cross-sectional shape of each partition wall 19 is a right circular cone. Therefore, the incident angle of the light L incident on each side surface of the partition wall 19 from the light emitting element 12 increases, and the light L can be totally reflected by the side surface of the partition wall 19.

[0200] ​​Accordingly, light leakage and light condensing properties between the subpixels 10 can be improved. Thus, color mixing (color crosstalk) can be prevented, and extraction efficiency of the light L in the front direction can be improved. Furthermore, improving the extraction efficiency of the light L in the front direction makes it possible to improve the light emission efficiency.

[0201] In the display device according to Patent Document 1, the partition portion is formed only in the protective layer, and the cross-sectional shape of the partition portion is rectangular. Accordingly, it is difficult to sufficiently prevent light leakage between adjacent light emitting elements, and there is room for improvement. In contrast, in the display device according to one embodiment, each of the partition walls 19 is formed over the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17, and the cross-sectional shape of the partition wall 19 is a right pyramid. Thereby, light leakage between adjacent light emitting elements 12 can be reduced.

[0202] <4 Modification>

[0203] [First Modification]

[0204] In one embodiment, an example in which the refractive index n3 of the partition wall 19 is the same as the refractive index n2 of the sealing resin layer 20 is described. However, the relationship between the refractive index n3 of the partition wall 19 and the refractive index n2 of the sealing resin layer 20 is not limited to this example, and for example, the refractive index n3 of the partition wall 19 can be lower than the refractive index n2 of the sealing resin layer 20. In this case, as shown in FIG. 10, the light L emitted from the light emitting element 12 can be refracted at the interface between the top of the partition wall 19 and the sealing resin layer 20, and the light beam can be bent in the front direction. Accordingly, the front luminance of the display device 101 can be further increased. Note that in FIG. 10, the light L0 indicates light in the case where the refractive index n3 of the partition wall 19 is the same as the refractive index n2 of the sealing resin layer 20. Figure 14 Figure 14

[0205] [Second Modification]

[0206] In one embodiment, an example in which the display device 101 includes the lens array 18 has been described. However, the lens array 18 is not an essential component, and the display device 101 need not include the lens array 18. In this case, the display device 101 need not include the second planarization layer.

[0207] [Third Modification]

[0208] In one embodiment, an example in which the display device 101 includes the planarization layer 15 and the planarization layer 17 has been described. However, the planarization layer 15 and the planarization layer 17 are not essential components, and the display device 101 need not include at least one of the planarization layer 15 and the planarization layer 17.

[0209] [Fourth Modification]​​

[0210] The partition wall 19 can be arranged only between the adjacent light emitting elements 12 included in a predetermined region of the display region RE1. For example, while the partition wall 19 is arranged between the adjacent light emitting elements 12 included in a central region (first region) of the display region RE1, the partition wall 19 need not be arranged between the adjacent light emitting elements 12 included in a peripheral edge region (second region) of the display region RE1.

[0211] In the central region of the display region RE1, a center of each lens 181 can coincide with a center of a light emitting region of the light emitting element 12 when viewed in plan. In contrast, in the peripheral edge region of the display region RE1, a center of each lens 181 can be shifted to a peripheral side of the display region RE1 with respect to a center of a light emitting region of the light emitting element 12 when viewed in plan. In this case, when a chief ray angle (CRA) of the central region of the display region RE1 is set to 0°, the CRA of the peripheral edge region of the display region RE1 is set to a predetermined angle θ.

[0212] In the central region of the display region RE1, a center of each colored layer 160 can substantially coincide with a center of a light emitting region of the light emitting element 12 when viewed in plan. In contrast, in the peripheral edge region of the display region RE1, a center of each colored layer 160 can be shifted to a peripheral side of the display region RE1 with respect to a center of a light emitting region of the light emitting element 12 when viewed in plan. In this case, when a CRA of the central region of the display region RE1 is set to 0°, the CRA of the peripheral edge region of the display region RE1 is set to a predetermined angle θ.

[0213] [5th Modification Example]

[0214] In one embodiment, an example in which the refractive index n3 of each partition wall 19 is lower than the refractive index of any of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 that contacts a side surface of the partition wall 19 has been described. However, the relationship between the refractive index n3 of the partition wall 19 and the refractive indices of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 that contacts a side surface of the partition wall 19 is not limited to this example. For example, the refractive index n3 of the partition wall 19 can be lower than the refractive index of at least one of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 that contacts a side surface of the partition wall 19. In this case, light L emitted from the light emitting element 12 to the wide-angle side can be totally reflected at an interface between at least one of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 and the partition wall 19.

[0215] [6th Modification Example]

[0216] In one embodiment, an example in which each of the partition walls 19 is formed on the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17 has been described. However, the configuration of the partition walls 19 is not limited to this example, and for example, the partition walls 19 can be formed on at least two of the protective layer 14, the planarization layer 15, the color filter 16, and the planarization layer 17.

[0217] [Seventh Modification Example]

[0218] The display device 101 can further include a substrate. The substrate can be provided on the first surface of the sealing resin layer 20. In this case, the sealing resin layer 20 can have a function as an adhesive layer for bonding the lens array 18 and the substrate. The substrate seals the first surface of the drive substrate 11 on which the plurality of light emitting elements 12 and the like are provided. The substrate has translucency with respect to each color of light L emitted from the color filter 16. The substrate is, for example, a glass substrate.

[0219] [Eighth Modification Example]

[0220] From the viewpoint of improving light extraction efficiency and / or improving color purity, each of the light emitting elements 12 can have a resonator structure.

[0221] In a case where each of the first electrodes 121 is a reflective electrode having a function as a reflective layer, the resonator structure can be configured by the first electrode 121 and the second electrode 123. In this case, the optical distance between the first electrode 121 and the second electrode 123 can be set by the thickness of the OLED layer 122, can be set by selecting the material of the first electrode 121, or can be set by a combination thereof.

[0222] In a case where the first electrode 121 is a transparent electrode, a reflective layer can be provided below the transparent electrode, and the reflective layer and the second electrode 123 can constitute the resonator structure. In this case, the optical distance between the reflective layer and the second electrode 123 can be set by the thickness of the OLED layer 122, can be set by selecting the material of the reflective layer, can be set by the thickness of an insulating layer provided between the first electrode 121 (transparent electrode) and the reflective layer, or can be set by a combination of two or more thereof.

[0223] [Ninth Modification Example]

[0224] In one embodiment, an example in which the display device 101 includes a plurality of light emitting elements 12 capable of emitting white light and a color filter 16 has been described, and a color image can be displayed by a combination thereof. However, the method of coloring the display device 101 is not limited thereto. For example, instead of the plurality of light emitting elements 12 capable of emitting white light, the display device 101 can include a plurality of light emitting elements capable of emitting red light, a plurality of light emitting elements capable of emitting green light, and a plurality of light emitting elements capable of emitting blue light. In this case, the color filter is not a necessary component, and can or can not be provided.

[0225] Examples of the light emitting element capable of emitting light of a predetermined color (red light, green light, or blue light) include: (1) a light emitting element including a light emitting layer capable of emitting light of a predetermined color (red light, green light, or blue light); (2) a light emitting element including a light emitting layer capable of emitting white light, the light emitting element being capable of enhancing light of a predetermined wavelength (red light, green light, or blue light) included in the white light emitted by the light emitting layer by resonating with a resonator structure; and (3) a light emitting element including a light emitting layer capable of emitting light of a predetermined color (red light, green light, or blue light), the light emitting element being capable of enhancing light of a predetermined wavelength included in the light of the predetermined color emitted by the light emitting layer by resonating with a resonator structure.

[0226] [10th Modification Example]

[0227] In one embodiment, an example in which the color filter 16 is provided has been described, but a quantum dot layer can be provided instead of the color filter 16, or can be provided together with the color filter 16. The quantum dot layer is a color conversion layer including quantum dots (semiconductor particles), and is capable of converting the color of light L emitted from the plurality of light emitting elements. In this case, the plurality of light emitting elements 12 can be configured to be capable of emitting blue light.

[0228] [11th Modification Example]

[0229] In one embodiment, an example in which each of the light emitting elements 12 is an OLED element has been described. However, the light emitting element is not limited to this example, and can be, for example, a self-emitting light emitting element such as a light emitting diode (LED) element, an inorganic electroluminescence (IEL) element, a quantum dot light emitting diode (QLED) element, or a semiconductor laser element. The display device 101 can be provided with two or more types of light emitting elements.

[0230] [Other Modification Examples]

[0231] Although one embodiment of the present disclosure and modifications thereof (hereinafter referred to as "one embodiment or the like") have been specifically described above, the present disclosure is not limited to one embodiment or the like, and various modifications based on the technical idea of the present disclosure are possible.

[0232] For example, the configurations, methods, steps, shapes, materials, numerical values, and the like described in one embodiment or the like are merely examples, and different configurations, methods, steps, shapes, materials, numerical values, and the like can be employed as needed.

[0233] The configurations, methods, steps, shapes, materials, numerical values, and the like in one embodiment or the like can be combined with each other without departing from the spirit of the disclosure.

[0234] The materials exemplified in one embodiment or the like can each be used alone or in combination of two or more, unless otherwise specified.

[0235] Two or more structures in the first to tenth modified examples can be combined.

[0236] Further, the present disclosure can employ the following configurations. (1)

[0238] A display device including: a plurality of light emitting elements arranged two-dimensionally; a plurality of layers stacked on the plurality of light emitting elements; and a partition wall disposed between adjacent light emitting elements in plan view and formed on two or more layers included in the plurality of layers, wherein a cross-sectional shape of the partition wall includes a right pyramid shape. (2)

[0240] The display device according to (1), wherein a refractive index of the partition wall is lower than refractive indexes of the two or more layers. (3)

[0242] The display device according to (1) or (2), wherein the plurality of layers on the plurality of light emitting elements yici include a protective layer, a color filter, and a sealing resin layer. (4)

[0244] The display device according to (3), wherein the two or more layers include a protective layer and a color filter. (5)

[0246] The display device according to (1) or (2), wherein the plurality of layers on the plurality of light emitting elements yici include a protective layer, a first resin layer, a color filter, and a sealing resin layer. (6)

[0248] The display device according to (5), wherein the two or more layers include a protective layer, a first resin layer, and a color filter. (7)

[0250] The display device according to (1) or (2), wherein The plurality of layers include, in order on the plurality of light emitting elements, a protective layer, a first resin layer, a color filter, a second resin layer, a lens array, and a sealing resin layer. (8)

[0252] The display device according to (7), wherein The two or more layers include a protective layer, a first resin layer, a color filter, and a second resin layer. (9)

[0254] The display device according to any one of (3) to (8), wherein The refractive index of the partition wall is the same as the refractive index of the sealing resin layer. (10)

[0256] The display device according to any one of (3) to (8), wherein The sealing resin layer contacts a top portion of the partition wall, and The refractive index of the partition wall is lower than the refractive index of the sealing resin layer. (11)

[0258] The display device according to any one of (3) to (10), wherein The top portion of the partition wall is positioned at a position higher than the color filter with respect to the light emitting element. (12)

[0260] The display device according to any one of (3) to (11), wherein The plurality of light emitting elements include an organic layer containing an organic light emitting layer, The organic layer containing layer is continuous between adjacent light emitting elements, and A bottom portion of the partition wall is embedded in the protective layer. (13)

[0262] The display device according to (12), wherein The protective layer has a surface on a side of the light emitting element, and The bottom portion of the partition wall is separated from the surface. (14)

[0264] The display device according to (7) or (8), wherein A height of the top portion of the partition wall coincides with a height of a bottom surface of a lens included in the lens array. (15)

[0266] The display device according to any one of (1) to (14), wherein The bottom of the partition wall is disposed at a position that does not overlap the light emitting region of each light emitting element when viewed in plan. (16)

[0268] An electronic device including the display device according to any one of (1) to (15).

[0269] <5 Examples of Leak Prevention Structure>

[0270] The OLED layer 122 of the display device 101 according to one embodiment or the like is continuous between the light emitting elements 12 adjacent in the in-plane direction of the first surface of the drive substrate 11, and is a common layer of the plurality of light emitting elements 12. Therefore, in the display device 101 according to one embodiment or the like, current leakage can occur between the light emitting elements 12 adjacent. Hereinafter, an example of a leak prevention structure for preventing such current leakage between the light emitting elements 12 will be described. Note that in the following first to seventh examples, an example in which the OLED layer 122 includes two light emitting units U1 and U2 will be described.

[0271] (Leak Prevention Structure: First Embodiment)

[0272] Figure 15 is a cross-sectional view of the first example of the leak prevention structure. Note that in Figure 15 , the illustration of the layers above the second electrode 123 is omitted. Similarly, in the cross-sectional views for describing the leak prevention structures of the second to ninth examples, the illustration of the layers above the second electrode 123 is omitted.

[0273] The insulating layer 13 has an opening 13a over each first electrode 121, and covers the first electrode 121 from the peripheral edge portion of the first surface of the first electrode 121 to the side surface (end surface) of the first electrode 121. Specifically, the insulating layer 13 includes a side wall portion 13b and an extension portion 13c. The side wall portion 13b stands perpendicular to the first surface of the drive substrate 11 and covers the side surface of the first electrode 121. The extension portion 13c extends from the upper end of the inner peripheral surface of the side wall portion 13b toward the center of the first surface of the first electrode 121, and covers the peripheral edge portion of the first surface of the first electrode 121.

[0274] The inner peripheral portion of each opening 13a of the insulating layer 13 has a projection 132b having a gable shape that projects toward the center of the opening 13a. The projection 132b is separated from the first surface of the first electrode 121. The projection 132b is preferably provided on the entire circumference of the peripheral edge portion of the opening 13a, but can also be provided on a part of the entire circumference of the peripheral edge portion of the opening 13a.

[0275] The resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is reduced by each projection 132b (the projection 132b and the projection 132b) Figure 15The cutting or increase of the resistance of the light emitting unit U1 and the charge generation layer 1227 at the protruding portion 132b can be caused by the shielding effect of the protruding portion 132b when the OLED layer 122 is formed. The cutting or increase of the resistance of the light emitting unit U1 and the charge generation layer 1227 at the protruding portion 132b can be caused by the shielding effect of the protruding portion 132b when the OLED layer 122 is formed. The air gap 132c can be formed between the protruding portion 132b and the first electrode 121.

[0276] The insulating layer 13 has, in order, a first insulating layer 131 and a second insulating layer 132 on the first surface of the drive substrate 11 and the first surface of each first electrode 121. The first insulating layer 131 has a plurality of first openings 131a. The second insulating layer 132 has a plurality of second openings 132a. Each opening 13a includes the first opening 131a and the second opening 132a that overlap each other. The inner peripheral portion of the second opening 132a of the second insulating layer 132 protrudes more toward the inside of the opening 13a than the inner peripheral portion of the first opening 131a of the first insulating layer 131 to form a protruding portion 132b.

[0277] (Leakage prevention structure: second embodiment)

[0278] Figure 16 is a cross-sectional view of a second example of the leakage prevention structure. The second example is different from the first example in that the insulating layer 13 includes a third insulating layer 133 in addition to the first insulating layer 131 and the second insulating layer 132.

[0279] The third insulating layer 133 is provided between the drive substrate 11 and the first insulating layer 131 and between the first electrode 121 and the first insulating layer 131. The third insulating layer 133 has a third opening 133a on the first surface of each first electrode 121. In the second example, the opening 13a is composed of the first opening 131a, the second opening 132a, and the third opening 133a that overlap each other. The inner peripheral portion of the third opening 133a protrudes more toward the inside of the opening 13a than the inner peripheral portion of the first opening 131a. The air gap 132c can be formed between the protruding portion 132b and the third insulating layer 133.

[0280] (Leakage prevention structure: third and fourth examples)

[0281] In the first and second examples, an example in which the inner peripheral portion of each opening 13a of the insulating layer 13 has one protruding portion 132b has been described. However, the number of protruding portions included in the inner peripheral portion of the opening 13a of the insulating layer 13 is not limited to these examples, and the inner peripheral portion of the opening 13a of the insulating layer 13 can include two or more protruding portions. Hereinafter, an example in which the inner peripheral portion of the opening 13a of the insulating layer 13 has two protruding portions (third example) will be described, and an example in which the inner peripheral portion of the opening 13a of the insulating layer 13 has three protruding portions (fourth example) will be described.

[0282] Figure 17 is a cross-sectional view of a third example of a leak prevention structure. The third example differs from the second example in that the insulating layer 13 has, in order, a fourth insulating layer 134 and a fifth insulating layer 135 on the first surface of the second insulating layer 132, and the inner peripheral portion of each opening 13a of the insulating layer 13 has two protruding portions 132b and 135b each having a gable shape.

[0283] The resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is cut or increased by the protruding portion 132b and the protruding portion 135b. The protruding portion 135b is disposed at a higher position than the protruding portion 132b with respect to the first surface of the first electrode 121, and is separated from the first surface of the second insulating layer 132. The protruding portion 135b recedes in a direction away from the center of the opening 13a with respect to the protruding portion 132b.

[0284] The fourth insulating layer 134 has a fourth opening 134a. The fifth insulating layer 135 has a fifth opening 135a. In the third embodiment, each opening 13a is constituted by the first opening 131a, the second opening 132a, the third opening 133a, the fourth opening 134a, and the fifth opening 135a, which overlap each other. The inner peripheral portion of the fourth opening 134a recedes more in a direction away from the center of the opening 13a than the inner peripheral portion of the second opening 132a and the inner peripheral portion of the fifth opening 135a. The inner peripheral portion of the fifth opening 135a protrudes more to the inside of the opening 13a than the fourth opening 134a to form the protruding portion 135b.

[0285] Figure 18 is a cross-sectional view of a fourth example of a leak prevention structure. The fourth example differs from the third example in that the insulating layer 13 includes, in order, a sixth insulating layer 136 and a seventh insulating layer 137 on the first surface of the fifth insulating layer 135, and the inner peripheral portion of each opening 13a of the insulating layer 13 includes three protruding portions 132b, 135b, and 137b each having a gable shape.

[0286] The resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is cut or increased by the protrusion 132b, the protrusion 135b, and the protrusion 137b. The protrusion 137b is provided at a position higher than the protrusion 135b with respect to the first surface of the first electrode 121, and is separated from the first surface of the fifth insulating layer 135. The protrusion 137b is recessed with respect to the protrusion 135b toward a direction away from the center of the opening 13a.

[0287] The sixth insulating layer 136 has a sixth opening 136a. The seventh insulating layer 137 has a seventh opening 137a. In the fourth example, each opening 13a includes the first opening 131a, the second opening 132a, the third opening 133a, the fourth opening 134a, the fifth opening 135a, the sixth opening 136a, and the seventh opening 137a, which overlap with each other. The inner circumferential portion of the sixth opening 136a is recessed toward a direction away from the center of the opening 13a than the inner circumferential portion of the fifth opening 135a and the inner circumferential portion of the seventh opening 137a. The inner circumferential portion of the seventh opening 137a is protruded toward the inside of the opening 13a with respect to the sixth opening 136a to form the protrusion 137b.

[0288] (Fault prevention structure: fifth example)

[0289] Figure 19 is a cross-sectional view of the fifth example of the fault prevention structure. The fifth example is different from the second example in that the insulating layer 13 has an eighth insulating layer 138 in addition to the first insulating layer 131, the second insulating layer 132, and the third insulating layer 133, and the inner circumferential portion of each opening 13a of the insulating layer 13 has two protrusions 132b and 133b, each of which has a eave shape.

[0290] The resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is cut or increased by the protrusion 132b and the protrusion 133b. Each protrusion 133b is protruded toward the inside of the opening 13a than the protrusion 132b. The protrusion 133b is provided at a position lower than the protrusion 132b with respect to the first surface of the first electrode 121. The protrusion 133b is separated from the first surface of the first electrode 121.

[0291] The eighth insulating layer 138 is provided between the driving substrate 11 and the third insulating layer 133 and between the first electrode 121 and the third insulating layer 133. The eighth insulating layer 138 has an eighth opening 138a. In the fifth embodiment, the opening portion 13a is composed of the first opening portion 131a, the second opening portion 132a, the third opening portion 133a, and the eighth opening portion 138a which overlap each other. The inner peripheral portion of the third opening 133a of the third insulating layer 133 protrudes more to the inside of the opening 13a than the inner peripheral portion of the eighth opening 138a of the eighth insulating layer 138, and forms a protruding portion 133b.

[0292] (Leakage prevention structure: sixth example)

[0293] Figure 20 is a cross-sectional view of the sixth example of the leakage prevention structure. The sixth example differs from the first example in that the insulating layer 13 has a protruding portion 13b1 on the outer peripheral portion of each side wall portion 13b, instead of having a protruding portion 132b on the inner peripheral portion of each opening 13a. Figure 20 An example in which the insulating layer 13 has a single-layer structure but can have a laminated structure of two or more layers is shown.

[0294] The protruding portion 13b1 protrudes outward from the outer peripheral portion of the side wall portion 13b. The recessed portion 13b2 is provided at a position separated downward by a predetermined distance from the upper end of the outer peripheral portion of the side wall portion 13b. In this way, by providing the recessed portion 13b2 on the outer peripheral portion of the side wall portion 13b, the protruding portion 13b1 is formed at the upper end portion of the outer peripheral portion of the side wall portion 13b. The protruding portion 13b1 and the recessed portion 13b2 are preferably provided on the entire circumference of the outer peripheral portion of the side wall portion 13b, but can be provided on a part of the entire circumference of the outer peripheral portion of the side wall portion 13b.

[0295] The resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is cut or increased by each protruding portion 132b (region A shown in FIG. 12B). Figure 20 Thereby, current leakage between adjacent light emitting elements 12 can be prevented.

[0296] In the sixth example, an example in which the outer peripheral portion of each side wall portion 13b has one protruding portion 13b1 and one recessed portion 13b2 has been described. However, the number of protruding portions 13b1 and the number of recessed portions 13b2 included in the outer peripheral portion of the side wall portion 13b are not limited to this example, and the outer peripheral portion of the side wall portion 13b can include two or more protruding portions 13b1 and two or more recessed portions 13b2. In this case, two or more recessed portions 13b2 can be provided in order from the upper end to the lower end of the outer peripheral portion of the side wall portion 13b while being separated from each other by a predetermined distance.

[0297] (Leakage prevention structure: seventh example)

[0298] Figure 21 is a cross-sectional view of a seventh example of a leakage prevention structure. Grooves 13Gv are respectively provided between adjacent light emitting elements 12. Each groove 13Gv can be provided between adjacent light emitting elements 12 in a predetermined direction (e.g., the Y-axis direction), or can be provided so as to surround the light emitting elements 12. The grooves 13Gv are formed in the insulating layer 13 and the insulating layer 112.

[0299] The resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is cut or increased by each groove 13Gv. Thereby, current leakage between adjacent light emitting elements 12 can be prevented. Here, the increase in resistance means that, as shown in Figure 22 the light emitting unit U1 and the charge generation layer 1227 have a super-thin film thickness in the groove 13Gv, thereby increasing the resistance. Among the layers included in the OLED layer 122, the light emitting unit U2 located above the charge generation layer 1227 straddles the groove 13Gv.

[0300] (Leakage prevention structure: eighth example)

[0301] Figure 23 is a cross-sectional view of an eighth example of a leakage prevention structure. A plurality of lines 112a, a plurality of contact plugs 112b, and a plurality of contact electrodes 112c are provided in the insulating layer 112. Each contact plug 112b electrically connects the first electrode 121 and the line 112a. Grooves 13Gv are respectively provided between adjacent light emitting elements 12. The bottom surface of each groove 13Gv is constituted by the first surface of the contact electrode 112c. An auxiliary electrode 112d is provided on the side surface of each groove 13Gv. The auxiliary electrode 112d is in contact with the first surface of the contact electrode 112c.

[0302] The OLED layer 122 is cut by the groove 13Gv. Although Figure 23 an example in which the second electrode 123 is also cut by the groove 13Gv is shown, the second electrode 123 need not be cut by the groove 13Gv and can be continuous between adjacent light emitting elements 12. The second electrode 123 is in contact with the auxiliary electrode 112d on the side surface of each groove 13Gv. Further, the second electrode 123 is in contact with the contact electrode 112c on the bottom surface of each groove 13Gv. A protective layer 14 can be provided on the first surface of the second electrode 123 so as to follow the second electrode 123.

[0303] In the eighth embodiment, the leakage current can be drawn to the auxiliary electrode 112d and the contact electrode 112c between adjacent light emitting elements 12. Thereby, current leakage between adjacent light emitting elements 12 can be prevented.

[0304] (Leakage prevention structure: ninth example)

[0305] Figure 24is a cross-sectional view of a ninth example of a leakage prevention structure. In the ninth example, the display device 101 includes a plurality of third electrodes 124. Like the plurality of first electrodes 121, the plurality of third electrodes 124 is provided on the second surface side of the OLED layer 122. Each of the third electrodes 124 is provided between adjacent first electrodes 121.

[0306] Figure 25 is a plan view for describing the arrangement of the first electrodes 121 and the third electrodes 124. The plurality of third electrodes 124 is an island-shaped electrode group having an area smaller than that of the first electrode 121. The plurality of third electrodes 124 is regularly arranged at equal intervals from the adjacent first electrodes 121 to each other in plan view. From another viewpoint, in plan view, the plurality of third electrodes 124 is arranged to be spaced apart from each of the first electrodes 121 by a predetermined distance so as to surround the first electrode 121.

[0307] The plurality of wiring lines 112a, the plurality of wiring lines 112e, the plurality of contact plugs 112b, and the plurality of contact plugs 112f are provided in the insulating layer 112. Each of the contact plugs 112b electrically connects the first electrode 121 and the wiring line 112a. Each of the contact plugs 112f electrically connects the third electrode 124 and the wiring line 112e.

[0308] The plurality of third electrodes 124 is connected to the internal circuit of the display device 101 via the contact plugs 112f, the wiring lines 112e, and the like, and is set to a common constant potential. Specifically, when a voltage is applied to the OLED layer 122, the potential of each of the third electrodes 124 is set to a value smaller than that obtained by adding the threshold voltage of the OLED layer 122 to the potential of the second electrode 123. Thus, even in a case where a leakage current is generated from the first electrode 121 by applying a voltage to the OLED layer 122 through the first electrode 121 and the second electrode 123, the leakage current flows preferentially through the third electrode 124. Thus, the leakage current is prevented from flowing from the first electrode 121 to the adjacent first electrode 121.

[0309] (Leakage Prevention Structure: Other Examples)

[0310] In the first to seventh examples, the example in which the OLED layer 122 includes two layers of the light emitting units U1 and U2 has been described. However, the configuration of the OLED layer 122 is not limited to this example, and the OLED layer 122 can have a single layer of the light emitting unit U or can have three or more layers of the light emitting unit U.

[0311] In the first to seventh examples, examples in which the resistance of the light emitting unit U1 and the charge generation layer 1227 included in the OLED layer 122 is cut or increased by the protrusions 132b, 133b, 135b, 137b, and 13b1 and the groove 13Gv (hereinafter referred to as "the protrusions 132b, the groove 13Gv, and the like") have been described. However, the layer cutting or resistance increase by the protrusions 132b, the groove 13Gv, and the like is not limited to this example. For example, the hole injection layer 1221 or the hole transport layer 1222 included in the OLED layer 122 can be cut or increased in resistance by the protrusions 132b, the groove 13Gv, and the like, and the hole injection layer 1221 and the hole transport layer 1222 included in the OLED layer 122 can be cut or increased in resistance by the protrusions 132b, the groove 13Gv, and the like. In the case where the OLED layer 122 includes three or more light emitting units U, the resistance of two or more light emitting units U and two or more charge generation layers 1227 included in the OLED layer 122 can be cut or increased by the protrusions 132b, the groove 13Gv, and the like.

[0312] <6 Example of Resonator Structure>

[0313] Each of the subpixels 10 included in the display device 101 according to one embodiment and the like can include a resonator structure that resonates light generated by the light emitting element 12. The resonator structure will be described below with reference to the drawings. Further, in the following description, a first surface of each layer can be referred to as an upper surface.

[0314] (Resonator Structure: First Example)

[0315] Figure 26 FIG. A is a schematic cross-sectional view for describing a first example of a resonator structure. In the following description, in the case where the light emitting elements provided corresponding to the subpixels 10R, 10G, and 10B are not particularly distinguished, those light emitting elements can be referred to as the light emitting element 12. In the case where the light emitting elements provided corresponding to the subpixels 10R, 10G, and 10B are distinguished, those light emitting elements can be referred to as the light emitting elements 12R, 12G, and 12B, respectively. The portions of the OLED layer 122 corresponding to the subpixels 10R, 10G, and 10B can be referred to as the OLED layer 122R, the OLED layer 122G, and the OLED layer 122B, respectively. R G B R G B

[0316] In the first example, the first electrode 121 is formed across the light emitting element 12 to have a common film thickness. The same applies to the second electrode 123.

[0317] ​​​​​​A reflector 71 is disposed below the first electrode 121 of each light-emitting element 12, with an optical adjustment layer 72 interposed therebetween. A resonant structure that causes resonance of the light generated by the OLED layer 122 is formed between the reflector 71 and the second electrode 123. In the following description, the optical adjustment layer 72 disposed corresponding to sub-pixels 10R, 10G, and 10B may be referred to as the optical adjustment layer 72, respectively. R 72 G and 72 B .

[0318] The reflector 71 is formed across the light-emitting element 12 with a common film thickness. The film thickness of each optical adjustment layer 72 varies depending on the color to be displayed by the sub-pixel. Due to the optical adjustment layer 72... R 72 G and 72 B With different film thicknesses, an optical distance can be set that resonates optimally with the wavelength of light corresponding to the color to be displayed.

[0319] exist Figure 26 In the example shown in A, the light-emitting element 12 R 12 G and 12 B The upper surface of the reflector 71 is arranged for alignment. As described above, since the film thickness of each optical adjustment layer 72 changes according to the color displayed by the sub-pixel, the position of the upper surface of the second electrode 123 is determined according to the light-emitting element 12. R 12 G and 12 B It changes according to the type.

[0320] The reflector 71 can be formed using, for example, a metal (such as aluminum (Al), silver (Ag) or copper (Cu)) or an alloy containing one of these metals as a main component.

[0321] The optical conditioning layer 72 may include, for example, silicon nitride (SiN). x ), silicon dioxide (SiO) x ) or silicon oxynitride (SiO) x N y The materials used are inorganic insulating materials or organic resin materials such as acrylic resin or polyimide resin. Each optical adjustment layer 72 can be a single layer or a multilayer film comprising multiple such materials. Furthermore, the number of layers can vary depending on the type of light-emitting element 12.

[0322] The first electrode 121 can be formed using a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).

[0323] The second electrode 123 needs to be used as a semi-transparent reflective film. The second electrode 123 can be formed using magnesium (Mg), silver (Ag), a magnesium-silver alloy (MgAg) containing one of these as a main component, an alloy containing an alkali metal or an alkaline earth metal, etc.

[0324] (Resonator Structure: Second Example)

[0325] Figure 26 B is a schematic cross-sectional view used to describe a second example of a resonator structure.

[0326] Similarly, in the second example, the first electrode 121 and the second electrode 123 are formed with a common film thickness spanning the light-emitting element 12.

[0327] Furthermore, also in the second embodiment, the reflector 71 is arranged below the first electrode 121 of each light-emitting element 12, with the optical adjustment layer 72 interposed therebetween. A resonant structure that causes the light generated by the OLED layer 122 to resonate is formed between the reflector 71 and the second electrode 123. Similar to the first embodiment, the reflector 71 has a common film thickness across the light-emitting elements 12, and the film thickness of each optical adjustment layer 72 varies according to the color to be displayed by the sub-pixel.

[0328] exist Figure 26 In the first example shown in A, the light-emitting element 12 R 12 G and 12 B The upper surface of the reflector 71 is arranged to be aligned, and the position of the upper surface of the second electrode 123 is determined according to the light-emitting element 12. R 12 G and 12 B Different types.

[0329] On the contrary, Figure 26 In the second example shown in B, the upper surface of the second electrode 123 is arranged across the light-emitting element 12. R 12 G and 12 B Alignment. To align the upper surface of the second electrode 123, on the light-emitting element 12... R 12 G and 12 B In the middle, the reflector 71 is arranged such that the position of the upper surface is determined by the light-emitting element 12. R 12 G and 12 B The type varies. Therefore, the lower surface of the reflector 71 (in other words, the upper surface of the base layer (insulating layer) 73) is formed in a stepped shape according to the type of the light-emitting element 12.

[0330] The materials of the reflector 71, the optical adjustment layer 72, the first electrode 121, and the second electrode 123 are similar to those described in the first example, and their description is omitted.

[0331] (Resonator Structure: Third Example)

[0332] Figure 27 A is a schematic cross-sectional view used to describe a third example of the resonator structure. In the following description, the reflectors 71 corresponding to sub-pixels 10R, 10G, and 10B may be referred to as reflectors 71, respectively. R 71 G and 71 B .

[0333] In the third example, the first electrode 121 and the second electrode 123 are also formed with a common film thickness spanning the light-emitting element 12.

[0334] Then, also in the third example, the reflector 71 is arranged below the first electrode 121 of each light-emitting element 12, with the optical adjustment layer 72 interposed therebetween. A resonant structure causing resonance of the light generated by the OLED layer 122 is formed between the reflector 71 and the second electrode 123. Similar to the first and second examples, the film thickness of each optical adjustment layer 72 varies according to the color displayed by the sub-pixel. Then, similar to the second example, the upper surface of the second electrode 123 is positioned across the light-emitting element 12. R 12 G and 12 B alignment.

[0335] exist Figure 27 In the second example shown in B, in order to align the upper surface of the second electrode 123, the lower surface of the reflector 71 is formed in a stepped shape according to the type of the light-emitting element 12.

[0336] On the contrary, Figure 27 In the third example shown in A, the film thickness of reflector 71 is determined according to the light-emitting element 12. R 12 G and 12 B The type is set differently. More specifically, the film thickness is set to align with reflector 71. R 71 G and 71 B The lower surface.

[0337] The materials of the reflector 71, the optical adjustment layer 72, the first electrode 121, and the second electrode 123 are similar to those described in the first example, and their description is omitted.

[0338] (Resonator Structure: Fourth Example)

[0339] Figure 27 B is a schematic cross-sectional view used to describe a fourth example of the resonator structure. In the following description, the first electrode 121 provided corresponding to sub-pixels 10R, 10G, and 10B may be referred to as the first electrode 121, respectively. R 121 G and 121 B .

[0340] exist Figure 27 In the first example shown in A, the first electrode 121 and the second electrode 123 of each light-emitting element 12 are formed to have a common film thickness. Then, a reflector 71 is arranged below the first electrode 121 of each light-emitting element 12, with an optical adjustment layer 72 interposed therebetween.

[0341] On the contrary, Figure 27 In the fourth example shown in B, the optical adjustment layer 72 is omitted, and according to the light-emitting element 12 R 12 G and 12 B The type sets the film thickness of the first electrode 121 to be different.

[0342] The reflector 71 is formed across the light-emitting element 12 to have a common film thickness. The film thickness of each first electrode 121 varies depending on the color to be displayed by the sub-pixel. Because the first electrode 121 R 121 G and 121 B With different film thicknesses, the optimal resonant optical distance for producing the light wavelength can be set according to the desired color.

[0343] The materials of the reflector 71, the optical adjustment layer 72, the first electrode 121, and the second electrode 123 are similar to those described in the first example, and their description is omitted.

[0344] (Resonator Structure: Fifth Example)

[0345] Figure 28 A is a schematic cross-sectional view used to describe the fifth example of a resonator structure.

[0346] exist Figure 26 In the first example shown in A, the first electrode 121 and the second electrode 123 are formed across the light-emitting element 12 to have a common film thickness. Then, a reflector 71 is arranged below the first electrode 121 of each light-emitting element 12, with an optical adjustment layer 72 interposed therebetween.

[0347] In contrast, Figure 28 In example 5 shown in Figure A, the optical adjustment layer 72 is omitted, and an oxide film 74 is formed on the surface of the reflector 71. The thickness of the oxide film 74 is determined according to the light-emitting element 12. R, 12 G and 12 B The type of the light-emitting element 12 R , 12 G and 12 B is changed. In the following description, the oxide film 74 provided in correspondence with the sub-pixels 10R, 10G and 10B can be referred to as oxide films 74R, 74G and 74B, respectively.

[0348] The film thickness of each oxide film 74 is different depending on the color displayed by the sub-pixel. Because the film thicknesses of the oxide films 74R, 74G, 74B are different, each optical distance at which the wavelength of light corresponding to the color displayed resonates optimally can be set.

[0349] The oxide film 74 is a film obtained by oxidizing the surface of the reflector 71, and includes, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, or the like. Each oxide film 74 functions as an insulating film for adjusting the optical path length (optical distance) between the reflector 71 and the second electrode 123.

[0350] The oxide film 74 having a different film thickness can be formed, for example, as follows, depending on the type of the light-emitting element 12 R , 12 G and 12 B .

[0351] First, an electrolyte solution is filled in a container, and a substrate on which the reflector 71 is formed is immersed in the electrolyte solution. Further, an electrode is arranged to face the reflector 71.

[0352] Then, a positive voltage is applied to the reflector 71 with respect to the electrode to anodize the reflector 71. The film thickness of the oxide film caused by anodization is proportional to the voltage value of the counter electrode. Therefore, anodization is performed in a state where a voltage corresponding to the type of the light-emitting element 12 R , 71 G and 71 B is applied to each of the reflectors 71. By this, oxide films 74 having different film thicknesses can be formed in one process.

[0353] The materials of the reflector 71, the first electrode 121 and the second electrode 123 are similar to those described in the first example, and the description thereof is omitted.

[0354] (Resonator structure: sixth example)

[0355] Figure 28 B is a schematic cross-sectional view for describing the sixth example of the resonator structure.

[0356] In the sixth example, each light emitting element 12 includes a first electrode 121, an OLED layer 122, and a second electrode 123 stacked with each other. Note that in the sixth example, each first electrode 121 is formed so as to function as both an electrode and a reflector. The first electrode (also functioning as a reflector) 121 is formed using a material having an optical constant selected according to the type of light emitting element 12 R G B The phase shift caused by the first electrode (also functioning as a reflector) 121 changes, and thus the optical distance that causes the best resonance of the wavelength of light can be set according to the color to be displayed.

[0357] The first electrode (also functioning as a reflector) 121 can be formed using a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing one of these metals as a main component. For example, the first electrode (also functioning as a reflector) 121 of the light emitting element 12 R R may be formed using copper (Cu), and the first electrode (also functioning as a reflector) 121 of the light emitting element 12 G G and the first electrode (also functioning as a reflector) 121 of the light emitting element 12 B B may be formed using aluminum.

[0358] The material, etc., of the second electrode 123 is similar to those described in the first example, and the description thereof is omitted.

[0359] (Resonator structure: seventh example)

[0360] Figure 29 is a schematic cross-sectional view for describing the seventh example of the resonator structure.

[0361] In the seventh example, basically, the sixth example is applied to the light emitting elements 12 R and 12 G , and the first example is applied to the light emitting element 12 B . Further, in this configuration, the optical distance that causes the best resonance of the wavelength of light can be set according to the color to be displayed.

[0362] The first electrode (also functioning as a reflector) 121 R and 121 G for the light emitting elements 12 R and 12 G may be formed using a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing one of these as a main component.

[0363] The reflector 71​​​​​B Optical adjustment layer 72 B and for light-emitting element 12 B First electrode 121 B The materials, etc., are similar to those described in the first example, so their description is omitted.

[0364] <7 Application Examples>

[0365] (Electronic devices)

[0366] The display device 101 according to one embodiment can be installed in various electronic devices. The display device 101 according to one embodiment is particularly suitable for eyeglass devices, such as head-mounted displays, electronic viewfinders of cameras or single-lens reflex cameras, which require high resolution and are used near the eyes in a magnified manner.

[0367] (Specific example 1)

[0368] Figure 30 A and Figure 30 Figure B shows an example of the appearance of a digital still camera 310. The digital still camera 310 is a single-lens reflex type with interchangeable lenses and includes an interchangeable imaging lens unit (interchangeable lens) 312 located substantially at the center of the front part of the camera body (camera body) 311, and a grip part 313 on the left front side for the person to hold when capturing images.

[0369] The monitor 314 is positioned offset to the left from the center of the back of the camera body 311. An electronic viewfinder (eyepiece window) 315 is located above the monitor 314. By viewing the electronic viewfinder 315, the person capturing the image can visually identify the composition of the object guided by the imaging lens unit 312 through visual recognition of the optical image. The electronic viewfinder 315 includes any of the display devices 101 according to one embodiment, etc.

[0370] (Specific example 2)

[0371] Figure 31 An example of the appearance of a head-mounted display 320 is shown. The head-mounted display 320 is an example of an eyeglass device. For example, the head-mounted display 320 includes ear hook portions 322 on both sides of an eyeglass-shaped display unit 321 that are worn on the user's head. The display unit 321 includes any of a display device 101 according to one embodiment, etc.

[0372] (Specific example 3)

[0373] Figure 32An example of an appearance of a television device 330 is shown. 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 of the display devices 101 according to an embodiment or the like.

[0374] (Specific Example 4)

[0375] Figure 33 An example of an appearance of a see-through head-mounted display 340 is shown. The see-through head-mounted display 340 is an example of a goggle device. The see-through head-mounted display 340 includes a main body portion 341, an arm 342, and a lens barrel 343.

[0376] The main body portion 341 is connected to the arm 342 and the eyeglasses 350. Specifically, an end portion of the main body portion 341 in a longitudinal direction is coupled to the arm 342, and one side of a side surface of the main body portion 341 is coupled to the eyeglasses 350 via a connection member. Note that the main body portion 341 can be directly worn on a head of a human body.

[0377] The main body portion 341 includes a control board and a display unit for controlling an operation of the see-through head-mounted display 340. The arm 342 connects the main body portion 341 and the lens barrel 343 and supports the lens barrel 343. Specifically, the arm 342 is coupled to an end portion of the main body portion 341 and an end portion of the lens barrel 343 and fixes the lens barrel 343. Further, the arm 342 contains a signal line for communicating data related to an image provided from the main body portion 341 to the lens barrel 343.

[0378] The lens barrel 343 projects image light provided from the main body portion 341 via the arm 342 toward an eye of a user wearing the see-through head-mounted display 340 through an ocular lens 351. In the see-through head-mounted display 340, the display unit of the main body portion 341 includes any of the display devices 101 according to an embodiment or the like.

[0379] (Specific Example 5)

[0380] Figure 34 An example of an appearance of a smart phone 360 is shown. The smart phone 360 includes a display unit 361 that displays various information, an operation unit 362 that includes a button for receiving an operation input from a user, and the like. The display unit 361 includes any of the display devices 101 according to an embodiment or the like.

[0381] (Specific Example 6)

[0382] The display device 101 according to an embodiment or the like can be provided in various displays provided in a vehicle.

[0383] Figure 35 A andFigure 35 B is a view showing an example of an internal configuration of the vehicle 500 provided with various displays. Specifically, Figure 35 A is a view indicating an example of an internal state of the vehicle 500 from the rear to the front of the vehicle 500, Figure 35 B is a view indicating an example of an internal state of the vehicle 500 from the oblique rear to the oblique front of the vehicle 500.

[0384] The vehicle 500 includes a center display 501, a console display 502, a head-up display 503, a digital rear mirror 504, a steering wheel display 505, and a rear entertainment display 506. At least one of these displays includes any of the display devices 101 according to one embodiment or the like. For example, all of these displays can include any of the display devices 101 according to one embodiment or the like.

[0385] The center display 501 is arranged on a dashboard portion facing a driver seat 508 and a passenger seat 509. Figure 35 A and Figure 35 B shows an example of the center display 501 having a horizontally elongated shape extending from the driver seat 508 side to the passenger seat 509 side, but the screen size and arrangement position of the center display 501 are appropriately determined. The center display 501 is capable of displaying information sensed by various sensors. As specific examples, the center display 501 is capable of displaying an image captured by an image sensor, an image of a distance between an obstacle in front of or beside the vehicle 500 measured by a ToF sensor, a body temperature of an occupant detected by an infrared sensor, and the like. The center display 501 can be used to display at least one of, for example, safety-related information, operation-related information, a survival log, health-related information, authentication / recognition-related information, or entertainment-related information.

[0386] Safety-related information is information about drowsiness sensing, eye-off sensing, mischief sensing of children riding together, presence or absence of wearing of a seat belt, sensing of departure of a passenger, etc., and is information sensed by a sensor disposed on the rear surface side of the center display 501, for example, in an overlapping manner. Operation-related information senses a gesture related to an operation performed by an occupant using a sensor. The sensed gesture can include an operation of various devices in the vehicle 500. For example, sensing of an operation of an air conditioning device, a navigation device, an AV device, an illumination device, etc. Lifeguard includes a lifeguard of all occupants. For example, a lifelog includes a record of actions of each occupant in the vehicle. By obtaining and storing the lifelog, it is possible to check a state of each passenger at the time of an accident. Health-related information is information obtained by estimating a health condition of an occupant based on a body temperature of the occupant sensed by a sensor such as a temperature sensor. Alternatively, it is possible to image a face of the occupant by using an image sensor, and it is possible to estimate a health condition of the occupant from an imaged facial expression. Further, it is possible to have an automatic voice conversation with the occupant, and it is possible to estimate a health condition of the occupant based on a content of a response from the occupant. Authentication / recognition-related information includes information about a keyless entry function that performs face authentication by using a sensor, a function that automatically adjusts a seat height and a position by face recognition, etc. Entertainment-related information includes a function that detects operation information of an AV device performed by an occupant using a sensor, a function that recognizes a face of the occupant by a sensor and provides content suitable for the occupant by the AV device, etc.

[0387] For example, the console display 502 can be used to display lifelog information. The console display 502 is disposed near a shift lever 511 of a center console 510 between the driver seat 508 and the passenger seat 509. The console display 502 can also display information sensed by different sensors. Further, the console display 502 can display an image of a vehicle periphery captured by an image sensor, or can display an image of a distance to an obstacle of the vehicle periphery.

[0388] The head-up display 503 is virtually displayed in front of the windshield 512 in front of the driver seat 508. For example, the head-up display 503 can be used to display at least one of safety-related information, operation-related information, a lifelog, health-related information, authentication / recognition-related information, or entertainment-related information. Since the head-up display 503 is virtually disposed in front of the driver seat 508 in many cases, it is suitable for displaying information directly related to an operation of the vehicle 500, for example, a speed and a remaining amount of fuel (battery) of the vehicle 500.

[0389] The digital rearview mirror 504 is capable of displaying not only the rear of the vehicle 500 but also the state of the rear seat occupant, and thus, for example, by overlapping the sensor on the back side of the digital rearview mirror 504, it is possible to use it for displaying the lifesaver information.

[0390] 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, for example, at least one of safety-related information, operation-related information, lifesaving log, health-related information, authentication / identification-related information, or entertainment-related information. Specifically, because the steering wheel display 505 is close to the hand of the driver, it is suitable for displaying lifesaving log information such as the body temperature of the driver, or for displaying information on the operation of the AV device, air conditioning device, or the like.

[0391] The rear entertainment display 506 is attached to the rear surface side of the driver seat 508 or the passenger seat 509, and is used to be viewed by the passenger in the rear seat. The rear entertainment display 506 can be used to display, for example, at least one of safety-related information, operation-related information, lifesaving log, health-related information, authentication / identification-related information, or entertainment-related information. In particular, because the rear entertainment display 506 is in front of the passenger in the rear seat, information related to the passenger in the rear seat is displayed. For example, information on the operation of the AV device or the air conditioning device can be displayed, or the result of measuring the body temperature of the passenger in the rear seat or the like by the temperature sensor can be displayed.

[0392] The sensor can be arranged on the rear surface side of the display device 101 or the like in an overlapping manner so that the distance to an object present in the surrounding environment can be measured in this configuration. Optical distance measurement methods are roughly classified into passive and active types. With the passive type method, distance measurement is performed by receiving light from an object without projecting light from the sensor to the object. The passive type method includes a lens focusing method, a stereoscopic method, a monocular vision method, and the like. With the active type method, distance measurement is performed by projecting light to an object and measuring the reflected light from the object using a sensor. The active type method includes an optical radar method, an active stereoscopic method, an illumination difference stereoscopic method, a Moire topography method, an interference method, and the like. The display device 101 according to one embodiment or the like can be applied to any of these types of distance measurement. By using the sensor arranged on the rear surface side of the display device 101 in an overlapping manner, the above-described passive or active type distance measurement can be performed.

[0393] Reference Symbol List

[0394] 10R, 10G, 10B Sub-pixel

[0395] 11 Drive substrate

[0396] 111 Substrate

[0397] 112 insulating layer

[0398] 112b, 112g contact plug

[0399] 112a wire

[0400] 113 pad portion

[0401] 12 light emitting element

[0402] 121 first electrode

[0403] 122 OLED layer

[0404] 123 second electrode

[0405] 13 insulating layer

[0406] 13a opening

[0407] 14 protective layer

[0408] 15 planarization layer (first resin layer)

[0409] 16 color filter

[0410] 160R, 160G, 160B colored layer

[0411] 17 planarization layer (second resin layer)

[0412] 18 lens array

[0413] 181 lens

[0414] 19 partition wall

[0415] 20 sealing resin layer

[0416] 101 display device

[0417] 310 digital still camera

[0418] 320 head-mounted display

[0419] 330 television device

[0420] 340 see-through head-mounted display

[0421] 360 smartphone

[0422] 500 vehicle

[0423] U1, U2 light emitting unit

[0424] RE1 display region

[0425] RE2 peripheral region

Claims

1. A display device comprising: a plurality of light emitting elements arranged two-dimensionally; a plurality of layers stacked on the plurality of light emitting elements; and a partition wall arranged between adjacent light emitting elements in plan view and formed on two or more layers included in the plurality of layers, wherein a cross-sectional shape of the partition wall includes a right pyramid shape.

2. The display device according to claim 1, wherein a refractive index of the partition wall is lower than a refractive index of the two or more layers.

3. The display device according to claim 1, wherein the plurality of layers include, in order on the plurality of light emitting elements, a protective layer, a color filter, and a sealing resin layer.

4. The display device according to claim 3, wherein the two or more layers include the protective layer and the color filter.

5. The display device according to claim 1, wherein the plurality of layers include, in order on the plurality of light emitting elements, a protective layer, a first resin layer, a color filter, and a sealing resin layer.

6. The display device according to claim 5, wherein the two or more layers include the protective layer, the first resin layer, and the color filter.

7. The display device according to claim 1, wherein the plurality of layers include, in order on the plurality of light emitting elements, a protective layer, a first resin layer, a color filter, a second resin layer, a lens array, and a sealing resin layer.

8. The display device according to claim 7, wherein the two or more layers include the protective layer, the first resin layer, the color filter, and the second resin layer.

9. The display device according to claim 3, wherein a refractive index of the partition wall is the same as a refractive index of the sealing resin layer.

10. The display device according to claim 3, wherein the sealing resin layer is in contact with a top portion of the partition wall, and a refractive index of the partition wall is lower than a refractive index of the sealing resin layer.

11. The display device according to claim 3, wherein a top portion of the partition wall is positioned at a position higher than the color filter with respect to the light emitting element.

12. The display device according to claim 3, wherein the plurality of light emitting elements include an organic-containing layer including an organic light emitting layer, the organic-containing layer is continuous between adjacent light emitting elements, and a bottom portion of the partition wall is embedded in the protective layer.

13. The display device according to claim 12, wherein the protective layer has a surface on a side of the light emitting element, and the bottom portion of the partition wall is separated from the surface.

14. The display device according to claim 7, wherein a height of a top portion of the partition wall coincides with a height of a bottom surface of a lens included in the lens array.

15. The display device according to claim 1, wherein a bottom portion of the partition wall is provided at a position not overlapping with a light emitting region of each of the light emitting elements in plan view.

16. An electronic device comprising the display device according to claim 1. ​

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