Light-emitting device and electronic apparatus

Abstract

Provided is a light-emitting device with which it is possible to secure a carrier path in a direction away from a light-emitting region while increasing a contact area between a first electrode and a contact electrode. The light-emitting device includes a plurality of light-emitting elements in a light-emitting region, the light-emitting device including: a contact electrode disposed in a peripheral region around the light-emitting region; and a first electrode extending from the light emitting region to the surrounding region and connected to the contact electrode. The contact electrode has a plurality of first structures extending in a direction away from the light emitting region at a portion connecting the first electrode.

Description

Technical Field

[0001] The present disclosure relates to a light emitting device and an electronic device including the light emitting device. Background Art

[0002] A light-emitting device having a plurality of light-emitting elements in a light-emitting region is widely used. As one type of such a light-emitting device, a light-emitting device is known in which a contact electrode is provided in a peripheral region located around the light-emitting region, and a common electrode (e.g., a common cathode) shared by a plurality of light-emitting elements extends from the light-emitting region to the peripheral region to be connected to the contact electrode. For a light-emitting device having such a configuration, a technology for increasing the contact area between the common electrode and the contact electrode by providing a protrusion or a recess in the contact electrode has been proposed (e.g., see Patent Document 1).

[0003] Reference List

[0004] Patent Literature

[0005] Patent document 1: WO 2019 / 142582 A Summary of the invention

[0006] Problems to be solved by the present invention

[0007] However, when a protrusion or a recess is provided in the contact electrode as described above, there is a possibility that the common electrode is cut off by the step of the protrusion or the recess or the common electrode becomes thinner due to the step of the protrusion or the recess. When the common electrode enters such a state due to the step, there is a possibility that it becomes difficult to ensure a carrier path in a direction away from the light emitting area.

[0008] Therefore, an object of the present disclosure is to provide a light emitting device capable of increasing a contact area between a first electrode and a contact electrode while ensuring a carrier path in a direction away from a light emitting region, and an electronic device including the same.

[0009] Solution to the problem

[0010] In order to solve the above problems, a first light emitting device according to the present disclosure is a light emitting device, comprising:

[0011] a plurality of light emitting elements in the light emitting area;

[0012] a contact electrode disposed in a peripheral region surrounding the light emitting region; and

[0013] a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode, wherein

[0014] The contact electrode includes a plurality of first structures at a portion connected to the first electrode, and

[0015] The plurality of first structures extend in a direction away from the light emitting area.

[0016] A second light emitting device according to the present disclosure is a light emitting device comprising:

[0017] a plurality of light emitting elements in the light emitting area;

[0018] a contact electrode disposed in a peripheral region surrounding the light emitting region; and

[0019] a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode, wherein

[0020] The contact electrode includes a plurality of structure groups at a portion connected to the first electrode,

[0021] The plurality of structure groups are arranged at least in a circumferential direction of the outer periphery of the light emitting area, each of the structure groups includes a plurality of structures, and

[0022] Structural groups adjacent to each other in the circumferential direction are separated from each other.

[0023] An electronic device according to the present disclosure includes a first light emitting device or a second light emitting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a plan view of a display device for describing an overview.

[0025] Figure 2 is a plan view of the display device according to the first embodiment.

[0026] Figure 3 is along Figure 2 A cross-sectional view taken along line III-III in FIG.

[0027] Figure 4 It is an enlarged plan view of a portion of the surrounding area.

[0028] Figure 5 is a plan view of a display device according to a second embodiment.

[0029] Figure 6 is along Figure 5 A cross-sectional view taken along line VI-VI in FIG.

[0030] Figure 7 is a plan view of a display device according to a third embodiment.

[0031] Figure 8 It is an enlarged plan view of a portion of the surrounding area.

[0032] Fig. 9 is along Figure 7A cross-sectional view taken along line IX-IX in FIG.

[0033] Fig.10 is a cross-sectional view of a display device according to a fourth embodiment.

[0034] Fig.11 is a cross-sectional view of a display device according to a fifth embodiment.

[0035] Fig.12 3 is a plan view of a display device according to Modification Example 1.

[0036] Fig.13 is a cross-sectional view of a display device according to Modification Example 2.

[0037] Fig.14 It is a plan view of a display device according to variation 3.

[0038] Fig.15 is a cross-sectional view of a display device according to modification example 4.

[0039] Fig.16 This is a cross-sectional view of a display device according to variation 5.

[0040] Fig.17 This is a cross-sectional view of a display device according to variation 6.

[0041] Fig.18 A. Fig.18 B and Fig.18 , and C are each a conceptual diagram for describing the relationship between a normal line LN passing through the center of the light emitting unit, a normal line LN′ passing through the center of the lens member, and a normal line LN″ passing through the center of the wavelength selecting unit.

[0042] Fig.19 : is a conceptual diagram for describing the relationship between a normal line LN passing through the center of the light emitting unit, a normal line LN′ passing through the center of the lens member, and a normal line LN″ passing through the center of the wavelength selecting unit.

[0043] Fig. 20 A and Fig. 20 , and B are conceptual diagrams for describing the relationship between a normal line LN passing through the center of the light emitting unit, a normal line LN′ passing through the center of the lens member, and a normal line LN″ passing through the center of the wavelength selecting unit.

[0044] Fig.21 : is a conceptual diagram for describing the relationship between a normal line LN passing through the center of the light emitting unit, a normal line LN′ passing through the center of the lens member, and a normal line LN″ passing through the center of the wavelength selecting unit.

[0045] Fig. 22A is a schematic cross-sectional view for describing a first example of a resonator structure. Fig. 22 B is a schematic cross-sectional view for describing a second example of the resonator structure.

[0046] Fig.23 A is a schematic cross-sectional view for describing a third example of the resonator structure. Fig.23 B is a schematic cross-sectional view for describing a fourth example of the resonator structure.

[0047] Fig.24 A is a schematic cross-sectional view for describing a fifth example of the resonator structure. Fig.24 B is a schematic cross-sectional view for describing a sixth example of the resonator structure.

[0048] Fig.25 is a schematic cross-sectional view for describing a seventh example of the resonator structure.

[0049] Fig.26 A is a front view of a digital camera. Fig.26 B is a rear view of the digital camera.

[0050] Fig. 27 is a perspective view of a head mounted display.

[0051] Fig.28 It is a three-dimensional diagram of a television set.

[0052] Fig.29 is a perspective view of a see-through head mounted display.

[0053] Fig.30 is a perspective view of a smartphone.

[0054] Fig.31 A is a diagram showing a cabin of a vehicle viewed from the rear side to the front side of the vehicle.

[0055] Fig.31 B is a diagram showing the cab of the vehicle viewed from the inclined rear side to the inclined front side of the vehicle. DETAILED DESCRIPTION

[0056] The embodiments of the present disclosure will be described in the following order with reference to the drawings. In addition, in all the drawings of the following embodiments, the same reference numerals are given to the same or corresponding parts.

[0057] 1. General description of the light emitting device according to the present disclosure

[0058] 2. Overview

[0059] 3. First Embodiment (Example of Display Device)

[0060] 4. Second Embodiment (Example of Display Device)

[0061] 5. Third Embodiment (Example of Display Device)

[0062] 6. Fourth Embodiment (Example of Display Device)

[0063] 7. Fifth Embodiment (Example of Display Device)

[0064] 8. Modifications

[0065] 9. Relationship between normal lines passing through respective centers of the light emitting unit, lens member, and wavelength selection unit

[0066] 10. Examples of resonator structures

[0067] 11. Application examples (examples of electronic devices)

[0068] <1. General Description of the Light Emitting Device According to the Present Disclosure>

[0069] The light emitting device according to the present disclosure may be a display device, a lighting device, or another type of device. The display device may be an organic light emitting diode (OLED) display device.

[0070] In the light emitting device according to the present disclosure, the first electrode may be an anode or cathode of the light emitting element, or may be a common electrode connected to an anode or cathode of each of a plurality of light emitting elements. The light emitting element may be an OLED element.

[0071] In the light-emitting device according to the present disclosure, when the first electrode is used as an anode and the second electrode is used as a cathode, the plurality of light-emitting elements may include a plurality of anodes arranged in a light-emitting region, a cathode extending from the light-emitting region to a surrounding region to be connected to a contact electrode, and an organic light-emitting layer arranged between the plurality of anodes and the cathode.

[0072] In the light-emitting device according to the present disclosure, when the first electrode is used as a cathode and the second electrode is used as an anode, the plurality of light-emitting elements may include a plurality of anodes arranged in a light-emitting region, a cathode extending from the light-emitting region to a surrounding region to be connected to a contact electrode, and an organic light-emitting layer arranged between the plurality of cathodes and the anode.

[0073] In the light-emitting device according to the present disclosure, in the case where the first electrode is used as a common electrode connected to the anode or cathode of each of the plurality of light-emitting elements, the plurality of light-emitting elements may include a plurality of types of light-emitting elements, and each of the plurality of types of light-emitting elements may emit light of a different color. For example, the plurality of types of light-emitting elements may include a first light-emitting element capable of emitting red light, a second light-emitting element capable of emitting green light, and a third light-emitting element capable of emitting blue light.

[0074] The multiple types of light-emitting elements may include an anode, a cathode, and an organic light-emitting layer, and the organic light-emitting layer may be arranged between the anode and the cathode. An anode, a cathode, and an organic light-emitting layer are respectively arranged for each light-emitting element. For example, a first light-emitting element may include an anode, a cathode, and a first organic light-emitting layer, and the first organic light-emitting layer may be capable of emitting red light. A second light-emitting element may include an anode, a cathode, and a second organic light-emitting layer, and the second organic light-emitting layer may be capable of emitting green light. A third light-emitting element may include an anode, a cathode, and a third organic light-emitting layer, and the third organic light-emitting layer may be capable of emitting blue light.

[0075] <2. Overview>

[0076] exist Figure 1 In the display device 601 shown, the cathode 623 extends from the effective pixel region RE3 to the peripheral region RE4 to be connected to the contact electrode (not shown). The contact electrode is connected to the wiring 615 through a plurality of contacts (not shown). The contact electrode includes a plurality of protrusions 691 at the portion to which the cathode 623 is connected, so as to increase the contact area between the cathode 623 and the contact electrode at the peripheral edge portion. The plurality of protrusions 691 extend in the circumferential direction of the periphery of the effective pixel region RE3, and constitute a plurality of examples arranged in a direction away from the effective pixel region RE3.

[0077] In the display device 601 constructed as described above, the peripheral edge portion of the cathode 623 may be cut off by the step of the protrusion 691, or the peripheral edge portion of the cathode 623 may be thinned due to the step of the protrusion 691. In the case where the peripheral edge portion of the cathode 623 enters this state, the resistance value of the cathode 623 in the direction away from the effective pixel region RE3 increases. Therefore, it is difficult to ensure a current path in the direction away from the effective pixel region RE3. Figure 1 , arrow 31 indicates an image of a current path that is not suppressed by the protrusion 691, and arrow 32 indicates an image of a current path that is suppressed by the protrusion 691. Note that in the following description, arrows 31 and 32 each indicate an image of a current path.

[0078] Based on the above point, the present inventors have thoroughly conducted research to ensure that the current path (carrier path) is in a direction away from the effective pixel region RE3 while increasing the contact area between the peripheral edge portion of the cathode 623 and the contact electrode. As a result, the present inventors have found a configuration in which a plurality of protrusions extending in a direction away from the effective pixel region RE3 are provided in the contact electrode.

[0079] <3. First Embodiment>

[0080] [Structure of Display Device 101]

[0081] Figure 2 is a plan view of the display device 101 according to the first embodiment. Figure 3 is along Figure 2 The display device 101 includes an effective pixel region RE1 and a peripheral region RE2 located around the effective pixel region RE1. The effective pixel region RE1 is an example of a light emitting region in the claims.

[0082] A plurality of sub-pixels 10R, 10G, and 10B are two-dimensionally arranged in a prescribed arrangement pattern in the effective pixel region RE1. The prescribed arrangement pattern may be, for example, a stripe arrangement, a triangle arrangement, a square arrangement, a mosaic arrangement, or another type of arrangement. A pad (not shown), a video display driver, etc. may be provided in the surrounding region RE2. A flexible printed circuit (FPC) (not shown) may be connected to the pad.

[0083] Sub-pixel 10R can emit red light (first light). Sub-pixel 10G can emit green light (second light). Sub-pixel 10B can emit blue light (third light). In the following description, unless otherwise specified, sub-pixels 10R, 10G, and 10B may be collectively referred to as sub-pixels 10. Each pixel includes, for example, a plurality of sub-pixels 10R, 10G, and 10B adjacent to each other, or a plurality of sub-pixels 10R, 10G, 10B, and 10B adjacent to each other.

[0084] The display device 101 is an example of a light emitting device. The display device 101 may be a top emission type OLED display device. The display device 101 may be a micro display. The display device 101 may 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 may be provided in an electronic viewfinder (EVF), a small projector, and the like.

[0085] like Figure 3 As shown, the display device 101 includes a drive substrate 11 , a plurality of light emitting elements 12W, an insulating layer 13 , a protective layer 14 , a color filter 15 , a filling resin layer 16 , a sealing portion 17 , a cover glass 18 , and a contact electrode 19 .

[0086] Here, of both sides of each layer constituting the display device 101, the top side (display surface side) of the display device 101 may be referred to as a first surface, and the bottom side (a side opposite to the display surface) of the display device 101 may be referred to as a second surface. Here, the peripheral edge portion of the first surface refers to an area having a predetermined width extending inwardly from the peripheral edge of the first surface, and the peripheral edge portion of the second surface refers to an area having a predetermined width extending inwardly from the peripheral edge of the second surface.

[0087] (Drive Substrate 11)

[0088] The drive substrate 11 is a so-called backplane, and drives the plurality of light emitting elements 12W. For example, the drive substrate 11 includes a substrate 111 and an insulating layer 112 in this order.

[0089] A plurality of driving circuits (not shown), a plurality of wirings 113 and 115, etc. may be provided on the first surface of the substrate 111. The substrate 111 may include, for example, a semiconductor substrate that is easy to form a transistor, etc., or a glass substrate or a resin substrate having low moisture permeability and oxygen permeability. The semiconductor substrate includes, for example, amorphous silicon, polycrystalline silicon, single crystal silicon, etc. The glass substrate includes, for example, high strain point glass, soda lime glass, borosilicate glass, forsterite, lead glass, quartz glass, etc. The resin substrate includes, for example, at least one selected from the group consisting of polymethyl methacrylate, polyvinyl alcohol, polyvinyl phenol, polyether sulfone, polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, etc.

[0090] The insulating layer 112 may be provided on the first surface of the substrate 111 to cover a plurality of driving circuits for planarization, a plurality of wirings 113 and 115, and the like. The insulating layer 112 may insulate the plurality of driving circuits, the plurality of wirings 113 and 115, and the like provided on the first surface of the substrate 111 from the plurality of light emitting elements 12W. The wirings 115 may be connected to pads (not shown).

[0091] The insulating layer 112 may include an organic insulating layer, an inorganic insulating layer, or a stack of an organic insulating layer and an inorganic insulating layer. The organic insulating layer may include, for example, at least one selected from the group consisting of polyimide resin, acrylic resin, novolac resin, etc. The inorganic insulating layer may include, for example, silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiO x N y ) etc.

[0092] The insulating layer 112 includes a plurality of contacts 114 and 116 therein. Each contact 114 electrically connects a corresponding light emitting element 12W and a wiring 113. Each contact 116 electrically connects a corresponding contact electrode 19 and a wiring 115. The contacts 114 and 116 include, for example, at least one selected from the group consisting of copper (Cu), titanium (Ti), and the like.

[0093] (Light emitting element 12W)

[0094] The light emitting element 12W can emit white light under the control of a corresponding driving circuit or the like. The light emitting element 12W is an OLED element. The OLED element can be a Micro-OLED (M-OLED) element. The light emitting element 12W is included in each of the sub-pixels 10R, 10G, and 10B representing the corresponding color.

[0095] A plurality of light emitting elements 12W are two-dimensionally arranged on the first surface of the drive substrate 11 in a predetermined arrangement pattern. The prescribed arrangement pattern is as described for the prescribed arrangement pattern of the plurality of sub-pixels 10. Each light emitting element 12W includes an anode 121, an OLED layer 122, and a cathode 123. The anode 121, the OLED layer 122, and the cathode 123 are stacked on the first surface of the drive substrate 11. In the first embodiment, the anode 121 is an example of a second electrode in the claims, and the cathode 123 is an example of a first electrode in the claims.

[0096] (Anode 121)

[0097] The anode 121 is provided on the second surface of the OLED layer 122. The anode 121 is a separate electrode provided separately for each of the plurality of light emitting elements 12W in the effective pixel region RE1. That is, the anode 121 is divided between the light emitting elements 12W adjacent to each other in the in-plane direction of the first surface of the drive substrate 11 in the effective pixel region RE1. When a voltage is applied between the anode 121 and the cathode 123, holes are injected from the anode 121 into the OLED layer 122.

[0098] Anode 121 may include, for example, a metal layer, or may include a metal layer and a transparent conductive oxide layer. In the case where anode 121 includes a metal layer and a transparent conductive oxide layer, the transparent conductive oxide layer is preferably disposed adjacent to OLED layer 122 from the viewpoint of placing a layer having a high work function adjacent to OLED layer 122.

[0099] The metal layer also serves as a reflective layer that reflects light generated in the OLED layer 122. The metal layer includes, for example, at least one metal element selected from the group consisting of chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), molybdenum (Mo), titanium (Ti), tantalum (Ta), aluminum (Al), magnesium (Mg), iron (Fe), tungsten (W), and silver (Ag). The metal layer may include the above-mentioned at least one metal element as a constituent element of an alloy. Specific examples of the alloy include aluminum alloys and silver alloys. Specific examples of the aluminum alloy include, for example, AlNd and AlCu.

[0100] The bottom layer (not shown) may be disposed adjacent to the second surface of the metal layer. The bottom layer may have the ability to enhance the crystal orientation of the metal layer when the metal layer is formed. The bottom layer includes, for example, at least one metal element selected from the group consisting of titanium (Ti) and tantalum (Ta). The bottom layer may include the above-mentioned at least one metal element as a constituent element of the alloy.

[0101] The transparent conductive oxide layer includes a transparent conductive oxide. The transparent conductive oxide includes, for example, at least one selected from the group consisting of a transparent conductive oxide including indium (hereinafter, referred to as "indium-based transparent conductive oxide"), a transparent conductive oxide including tin (hereinafter, referred to as "tin-based transparent conductive oxide"), and a transparent conductive oxide including zinc (hereinafter, referred to as "zinc-based transparent conductive oxide").

[0102] Indium-based transparent conductive oxides include, for example, indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium oxide (IGO), indium gallium zinc oxide (IGZO), and fluorine-doped indium oxide (IFO). Among these transparent conductive oxides, indium tin oxide (ITO) is particularly preferred. This is because indium tin oxide (ITO) has a particularly low barrier for hole injection into the OLED layer 122 in terms of work function, and accordingly, the driving voltage for the display device 101 can be particularly reduced. Tin-based transparent conductive oxides include, for example, tin oxide, antimony-doped tin oxide (ATO), or fluorine-doped tin oxide (FTO). Zinc-based transparent conductive oxides include, for example, zinc oxide, aluminum-doped zinc oxide (AZO), boron-doped zinc oxide, or gallium-doped zinc oxide (GZO).

[0103] (OLED layer 122)

[0104] The OLED layer 122 may emit white light and is disposed between a plurality of anodes 121 and a single cathode 123. The OLED layer 122 is a layer extending across the light emitting elements 12W adjacent to each other in the effective pixel region RE1 and is shared by the plurality of light emitting elements 12W in the effective pixel region RE1.

[0105] The OLED layer 122 may include a laminate including an organic light-emitting layer, and in this case, the layer of the laminate (e.g., the electron injection layer) may be an inorganic layer. The OLED layer 122 may be an OLED layer including a single-layer light-emitting unit, may be an OLED layer including two layers of light-emitting units (laminated structure), or may be an OLED layer having other types of structures. The OLED layer including a single-layer light-emitting unit has a configuration in which, for example, a hole injection layer, a hole transport layer, a red light-emitting layer, a light-emitting separation layer, a blue light-emitting layer, a green light-emitting layer, an electron transport layer, and an electron injection layer are stacked one on top of another in this order from the anode 121 toward the cathode 123. The OLED layer including two layers of light-emitting units has a configuration in which, for example, a hole injection layer, a hole transport layer, a blue light-emitting layer, an electron transport layer, a charge generation layer, a hole transport layer, a yellow light-emitting layer, an electron transport layer, and an electron injection layer are stacked one on top of another in this order from the anode 121 toward the cathode 123.

[0106] The hole injection layer can improve the efficiency of hole injection into each light-emitting layer and suppress leakage. The hole transport layer can improve the hole transport efficiency to each light-emitting layer. The electron injection layer can improve the efficiency of electron injection into each light-emitting layer. The electron transport layer can improve the electron transport efficiency to each light-emitting layer. The luminescence separation layer is a layer for adjusting the carrier injection into each light-emitting layer, and the luminescence balance of each color is adjusted by injecting electrons or holes into each light-emitting layer through the luminescence separation layer. The charge generation layer can provide electrons and holes separately to the two light-emitting layers sandwiched between the charge generation layers.

[0107] When an electric field is applied to the red, green, blue and yellow light-emitting layers, holes injected from the anode 121 or the charge generation layer and electrons injected from the cathode 123 or the charge generation layer are recombined to generate red, green, blue and yellow light, respectively.

[0108] (Cathode 123)

[0109] The cathode 123 is disposed on the first surface of the OLED layer 122. The cathode 123 is a common electrode extending across the light emitting elements 12W adjacent to each other in the effective pixel region RE1, and is shared by a plurality of light emitting elements 12W in the effective pixel region RE1. The cathode 123 extends from the effective pixel region RE1 to the surrounding region RE2. The second surface of the cathode 123 has a peripheral edge portion connected to the first surface of the contact electrode 19.

[0110] When a voltage is applied between the anode 121 and the cathode 123, electrons are injected from the cathode 123 into the OLED layer 122. The cathode 123 is transparent to the white light emitted from the OLED layer 122. The cathode 123 is preferably a transparent electrode transparent to visible light. In this article, visible light refers to light in the wavelength range of 360nm to 830nm.

[0111] The cathode 123 preferably includes a material having as high a transparency as possible and a low work function in order to improve the light emission efficiency. The cathode 123 includes, for example, at least one of a metal layer or a transparent conductive oxide layer. More specifically, the cathode 123 includes a single-layer film of a metal layer or a transparent conductive oxide layer or a multilayer film of a metal layer and a transparent conductive oxide layer. In the case where the cathode 123 includes such a multilayer film, the metal layer may be disposed adjacent to the OLED layer 122 or the transparent conductive oxide layer may be disposed adjacent to the OLED layer 122, but from the viewpoint of placing a layer having a low work function adjacent to the OLED layer 122, the metal layer is preferably disposed adjacent to the OLED layer 122.

[0112] For example, the metal layer includes at least one metal element selected from the group consisting of magnesium (Mg), aluminum (Al), silver (Ag), calcium (Ca) and sodium (Na). The metal layer may include the at least one metal element as a constituent element of an alloy. Specific examples of the alloy include MgAg alloy, MgAl alloy, AlLi alloy, etc. 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 above-mentioned anode 121 can be exemplified.

[0113] (Contact electrode 19)

[0114] The contact electrode 19 is provided on the first surface of the drive substrate 11 in the peripheral region RE2. The contact electrode 19 may have a layer shape. The contact electrode 19 is an auxiliary electrode connecting the cathode 123 and the wiring 115. The contact electrode 19 has a first surface electrically connected to the peripheral portion of the second surface of the cathode 123. On the other hand, the contact electrode 19 has a second surface connected to the wiring 115 through a plurality of contacts 116 and the like.

[0115] The contact electrode 19 may have a closed loop shape surrounding the entire circumference of the effective pixel region RE1 in a plan view, or may have a partially segmented loop shape partially surrounding the circumference of the effective pixel region RE1. Here, the plan view refers to a plan view when the object is viewed from a direction perpendicular to the first surface.

[0116] The contact electrode 19 includes a plurality of protrusions 191 on the first surface connected to the peripheral edge portion of the cathode 123. Each protrusion 191 is an example of a structure. The peripheral edge portion of the cathode 123 may be disposed on the first surface of the contact electrode 19 to follow the plurality of protrusions 191. Here, the peripheral edge portion of the cathode 123 refers to an area having a predetermined width extending inwardly from the peripheral edge of the cathode 123. In a plan view, the plurality of protrusions 191 extend in a direction away from the effective pixel region RE1. The plurality of protrusions 191 may be radially disposed around the effective pixel region RE1.

[0117] Herein, in a plan view, a direction away from the effective pixel region RE1 includes a direction perpendicular to the peripheral side of the effective pixel region RE1 (see FIG. Figure 2 ) and the direction inclined to the peripheral edge of the effective pixel region RE1 (see Figure 4 ). The plurality of protrusions 191 may include a plurality of protrusions 191 extending in a direction perpendicular to the periphery of the effective pixel region RE1 and a plurality of protrusions 191 extending in a direction inclined to the periphery of the effective pixel region RE1. In the case where the plurality of protrusions 191 include a plurality of protrusions 191 extending in a direction inclined to the peripheral edge of the effective pixel region RE1, the extension directions of the plurality of protrusions 191 may be the same, or may be two or more different directions.

[0118] An angle θ (see FIG. 1 ) formed by a vertical line L1 perpendicular to the peripheral edge of the effective pixel region RE1 and a central axis L2 of each protrusion 191 extending in a direction inclined to the peripheral edge of the effective pixel region RE1. Figure 4 ) is preferably ±10° or less, more preferably ±8° or less or ±6° or less, and more preferably ±5° or less, ±4° or less, ±3° or less, ±2° or less, ±1° or less, ±0.5° or less or ±0.1° or less. Here, the “+” angle represents the angle in the clockwise direction relative to the vertical line L1 perpendicular to the periphery of the effective pixel region RE1, and the “-” angle represents the angle in the counterclockwise direction relative to the vertical line L1 perpendicular to the periphery of the effective pixel region RE1. The central axis L2 of each protrusion 191 represents a straight line extending in the extending direction of the protrusion 191.

[0119] For example, the plurality of protrusions 191 have an elongated shape in a plan view. Specifically, the elongated shape may be, for example, a straight line shape, a rectangular shape, an elliptical shape, etc., or may be another type of shape. An oval shape includes an ellipse, an ellipse, an egg shape, etc. The plurality of protrusions 191 are arranged at intervals in the circumferential direction of the peripheral edge of the effective pixel region RE1 (i.e., in the circumferential direction of the contact electrode 19). The distance between the protrusions 191 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 may be constant or variable.

[0120] The contact electrode 19 includes, for example, at least one of a metal layer or a metal oxide layer. More specifically, for example, the contact electrode 19 includes a single-layer film of a metal layer or a metal oxide layer, or a multilayer film of a metal layer and a metal oxide layer. The contact electrode 19 preferably has a configuration similar to that of the anode 121. In this case, since the contact electrode 19 can be formed simultaneously with the anode 121, the process of manufacturing the display device 101 can be simplified.

[0121] As a material included in the contact electrode 19, a material similar to that of the anode 121 can be exemplified. Specifically, as a material included in the metal layer of the contact electrode 19, a material similar to that of the metal layer of the anode 121 can be exemplified, and as a material included in the metal oxide layer of the contact electrode 19, a material similar to that of the metal oxide layer of the anode 121 can be exemplified.

[0122] A bottom layer (not shown) may be disposed adjacent to the second surface of the metal layer. As a material included in the bottom layer, a material similar to that of the bottom layer of the anode 121 may be exemplified.

[0123] (Insulation layer 13)

[0124] The insulating layer 13 is disposed on the first surface of the drive substrate 11 between the separated anodes 121. The insulating layer 13 insulates between the anodes 121 adjacent to each other. The insulating layer 13 includes a plurality of first openings. Each of the plurality of first openings is provided for a corresponding light emitting element 12W. Each of the plurality of first openings may be disposed on the first surface (adjacent to the surface of the OLED layer 122) of the corresponding anode 121. The anode 121 and the OLED layer 122 are in contact with each other through the first openings.

[0125] The insulating layer 13 is further disposed between the anode 121 and the contact electrode 19 on the first surface of the drive substrate 11. The insulating layer 13 insulates between the anode 121 and the contact electrode 19. The insulating layer 13 includes a second opening. The second opening is disposed corresponding to the contact electrode 19. The second opening may be disposed on the first surface of the contact electrode 19 (the surface connected to the peripheral edge portion of the cathode 123). The peripheral edge portions of the contact electrode 19 and the cathode 123 are electrically connected through the second opening. The second opening may have a closed enlarged shape in a manner similar to the contact electrode 19.

[0126] The insulating layer 13 may be an organic insulating layer, an inorganic insulating layer, or a stack of an organic insulating layer and an inorganic insulating layer. The organic insulating layer may include at least one selected from the group consisting of polyimide resin, acrylic resin, phenolic varnish resin, etc. The inorganic insulating layer may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiO x N y ) etc.

[0127] (Protective layer 14)

[0128] The protective layer 14 is disposed on the first surface of the cathode 123. The protective layer 14 is transparent to the white light emitted from the light emitting element 12W. The protective layer 14 is preferably transparent to visible light. The protective layer 14 can protect the plurality of light emitting elements 12W and the like. For example, the protective layer 14 can block the plurality of light emitting elements 12W from the external air to inhibit moisture from entering the plurality of light emitting elements 12W from the external environment. In addition, in the case where the cathode 123 includes a metal layer, the protective layer 14 may have a function of inhibiting oxidation of the metal layer.

[0129] The protective layer 14 includes, for example, an inorganic material or a polymer resin having low hygroscopicity. The protective layer 14 may have a single-layer structure or a multi-layer structure. In the case where the thickness of the protective layer 14 is increased, the protective layer 14 preferably has a multi-layer structure. This is to relieve the internal stress in the protective layer 14. The inorganic material includes, for example, a silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiOx N y ), titanium oxide (TiO x ), aluminum oxide (Al0 x ) and the like. For example, the polymer resin includes at least one selected from the group consisting of thermosetting resins, ultraviolet curing resins, and the like. Specifically, for example, the polymer resin includes at least one selected from the group consisting of acrylic resins, polyimide resins, novolac resins, epoxy resins, norbornene resins, polyparaxylene resins, and the like.

[0130] The protective layer 14 may include an atomic layer deposition (ALD) layer. The protective layer 14 may further enhance the effect of inhibiting moisture ingress by including the ALD layer. The ALD layer includes, for example, aluminum oxide (AlO x ) or titanium oxide (TiO x ).

[0131] (Color filter 15)

[0132] The color filter 15 is disposed above the plurality of light emitting elements 12W. More specifically, the color filter 15 is disposed on the first surface of the protective layer 14 in the effective pixel region RE1. The color filter 15 is, for example, an on-chip color filter (OCCF). The color filter 15 includes, for example, a plurality of red filter sections 15FR, a plurality of green filter sections 15FG, and a plurality of blue filter sections 15FB. Note that in the following description, unless otherwise specified, the red filter section 15FR, the green filter section 15FG, and the blue filter section 15FB may be collectively referred to as a filter section 15F.

[0133] A plurality of filter portions 15F are two-dimensionally arranged on the first surface of the protective layer 14 in a predetermined arrangement pattern. The prescribed arrangement pattern is as described in the prescribed arrangement pattern of the plurality of sub-pixels 10. Each filter portion 15F is arranged above the corresponding light-emitting element 12W. Each sub-pixel 10R includes a corresponding light-emitting element 12W and a corresponding red filter portion 15FR arranged above the light-emitting element 12W. Each sub-pixel 10G includes a corresponding light-emitting element 12W and a corresponding green filter portion 15FG arranged above the light-emitting element 12W. Each sub-pixel 10B includes a corresponding light-emitting element 12W and a corresponding blue filter portion 15FB arranged above the light-emitting element 12W.

[0134] The red filter 15FR transmits the red light in the white light emitted by the light emitting element 12W, but absorbs light other than the red light. The green filter 15FG transmits the green light in the white light emitted by the light emitting element 12W, but absorbs light other than the green light. The blue filter 15FB transmits the blue light in the white light emitted by the light emitting element 12W, but absorbs light other than the blue light.

[0135] The red filter portion 15FR includes, for example, a red resist, the green filter portion 15FG includes, for example, a green color resist, and the blue filter portion 15FB includes, for example, a blue resist.

[0136] (Filling resin layer 16)

[0137] The filling resin layer 16 is filled between the color filter 15 and the cover glass 18. The filling resin layer 16 is disposed inside the sealing portion 17. The filling resin layer 16 has transparency to light of each color emitted through the color filter 15. The filling resin layer 16 preferably has transparency to visible light. The filling resin layer 16 may be used as an adhesive layer for bonding the color filter 15 and the cover glass 18 together.

[0138] The filling resin layer 16 includes, for example, a curable resin. The curable resin includes at least one selected from the group consisting of a thermosetting resin, an ultraviolet curable resin, etc. It should be noted that the filling resin layer 16 is not limited to a thermosetting resin or an ultraviolet curable resin, and may include a curable resin of a type other than the thermosetting resin and the ultraviolet curable resin.

[0139] (Sealing portion 17)

[0140] The sealing portion 17 is disposed between the peripheral edge portion of the first surface of the protective layer 14 and the peripheral edge portion of the second surface of the cover glass 18. The sealing portion 17 combines the peripheral edge portion of the first surface of the protective layer 14 and the peripheral edge portion of the second surface of the cover glass 18 together to seal the space between the peripheral edge portion of the protective layer 14 and the peripheral edge portion of the cover glass 18.

[0141] The sealing portion 17 is composed of, for example, a curable resin. For example, the curable resin includes at least one selected from the group consisting of a thermosetting resin, an ultraviolet curable resin, and the like. More specifically, the curable resin includes, for example, at least one selected from the group consisting of an epoxy resin, an acrylic resin, and the like. Note that the curable resin is not limited to a thermosetting resin or an ultraviolet curable resin, and may include a curable resin of a type other than the thermosetting resin and the ultraviolet curable resin.

[0142] (Cover glass 18)

[0143] The cover glass 18 is disposed on the first surface of the filling resin layer 16 and the first surface of the sealing portion 17. The cover glass 18 seals the first surface of the drive substrate 11 on which each component such as a plurality of light emitting elements 12W is disposed. The cover glass 18 has transparency to light of each color emitted by the color filter 15. The cover glass 18 preferably has transparency to visible light. The cover glass 18 is, for example, a glass substrate.

[0144] [Method of Manufacturing Display Device 101]

[0145] An example of a method for manufacturing the display device 101 according to the first embodiment will be described below.

[0146] (Process of Forming Anode 121 and Contact Electrode 19)

[0147] First, a metal layer and a metal oxide layer are sequentially formed on the first surface of the drive substrate 11 by, for example, a sputtering method, and then, the metal layer and the metal oxide layer are patterned using, for example, a photolithography technique. Thus, a plurality of anodes 121 and a contact electrode 19 are formed on the first surface of the drive substrate 11. Next, a plurality of protrusions 191 are formed on the first surface of the contact electrode 19 using, for example, a photolithography technique.

[0148] (Process of Forming Insulating Layer 13)

[0149] Next, an insulating layer 13 is formed on the first surface of the drive substrate 11 by, for example, a chemical vapor deposition (CVD) method to cover the plurality of anodes 121 and the contact electrode 19. Next, a plurality of first openings and a single second opening are formed in the insulating layer 13 by, for example, a photolithography technique. Thus, the first surface of each anode 121 is exposed through the corresponding first opening, and the first surface of the contact electrode 19 is exposed through the second opening.

[0150] (Process of Forming OLED Layer 122)

[0151] Next, a hole transport layer, a red light-emitting layer, a light-emitting separation layer, a blue light-emitting layer, a green light-emitting layer, an electron transport layer and an electron injection layer are stacked in sequence on the first surface of the drive substrate 11 by, for example, vapor deposition to cover multiple anodes 121, thereby forming an OLED layer 122.

[0152] (Process of Forming Cathode 123)

[0153] Next, a cathode 123 is formed on the first surface of the OLED layer 122 and the first surface of the contact electrode 19 by, for example, a vapor deposition method or a sputtering method. As a result, a plurality of light emitting elements 12W are formed on the first surface of the drive substrate 11, and the peripheral edge portion of the second surface of the cathode 123 is connected to the first surface of the contact electrode 19.

[0154] (Processing of Forming Protective Layer 14)

[0155] Next, the protective layer 14 is formed on the first surface of the cathode 123 by, for example, a CVD method or a vapor deposition method.

[0156] (Process of Forming Color Filter 15)

[0157] Next, a coloring composition for forming a green filter is applied to the first surface of the protective layer 14, and after pattern exposure by ultraviolet irradiation through a photomask, development is performed to form a plurality of green filter portions 15FG. Next, a coloring composition for forming a red filter is applied to the first surface of the protective layer 14, and after pattern exposure by ultraviolet irradiation through a photomask, development is performed to form a plurality of red filter portions 15FR. Next, a coloring composition for forming a blue filter is applied to the first surface of the protective layer 14, and after pattern exposure by ultraviolet irradiation through a photomask, development is performed to form a plurality of blue filter portions 15FB. Thus, the color filter 15 is formed on the first surface of the protective layer 14.

[0158] (Sealing treatment)

[0159] Next, a sealant is applied to the peripheral edge portion of the first surface of the protective layer 14 in a closed loop shape surrounding the display area R1 to form a frame, and then a filling resin is applied to the inside of the frame. Next, a cover glass 18 is placed on the filling resin and the sealant. Next, the sealant and the filling resin are cured by at least one of, for example, heat treatment or ultraviolet irradiation treatment. Therefore, the peripheral edge portion of the first surface of the protective layer 14 and the peripheral edge portion of the second surface of the cover glass 18 are bonded by the sealing portion 17, and a filling resin layer 16 is formed inside the sealing portion 17. Note that the method for curing the filling resin and the sealant is not limited to heat treatment or ultraviolet irradiation treatment, but may be a curing method that is neither heat treatment nor ultraviolet irradiation treatment. From the above, it can be obtained Figure 3 The display device 101 shown in FIG.

[0160] [Function and Effect]

[0161] In the display device 101 according to the first embodiment, the contact electrode 19 includes a plurality of protrusions 191 on the first surface connected to the peripheral edge portion of the cathode 123. The plurality of protrusions 191 extend in a direction away from the effective pixel region RE1 in a plan view and are arranged at intervals in the circumferential direction of the peripheral edge of the effective pixel region RE1. With this configuration, as shown in FIG. Figure 2 As shown by arrow 31 in FIG. 1 , a current path (carrier path) can be formed between the protrusions 191 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1. Therefore, a current path in a direction away from the effective pixel region RE1 can be ensured while increasing the contact area between the peripheral edge portion of the cathode 123 and the contact electrode 19. Therefore, the influence of a voltage drop at a connection portion between the peripheral edge portion of the cathode 123 and the contact electrode 19 can be suppressed, and a reduction in the brightness of the display device 101 can be suppressed. In addition, the frame of the display device 101 can be narrowed to reduce the size of the display device 101.

[0162] Even in the case where the size or brightness of the display device 101 is increased, the influence of the voltage drop at the connection portion between the peripheral edge portion of the cathode 123 and the contact electrode 19 can be suppressed.

[0163] <4. Second Embodiment>

[0164] [Configuration of Display Device 102]

[0165] Figure 5 is a plan view of a display device 102 according to the second embodiment. Figure 6 is along Figure 5 The display device 102 is different from the display device 101 according to the first embodiment in that the contact electrode 19 includes a plurality of protrusion groups 192 instead of the plurality of protrusions 191. Each protrusion group 192 is an example of a structure group in the claims.

[0166] (Protrusion group 192)

[0167] A plurality of protrusion groups 192 are arranged at intervals in the circumferential direction of the peripheral edge of the effective pixel region RE1 (i.e., in the circumferential direction of the contact electrode 19 in a plan view). The distance between the protrusion groups 192 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 may be constant or variable.

[0168] Each protrusion group 192 includes a plurality of first protrusions 192a and a plurality of second protrusions 192b. In the second embodiment, an example in which each protrusion group 192 includes a plurality of first protrusions 192a and a plurality of second protrusions 192b will be described, but each protrusion group 192 may include a plurality of first protrusions 192a and one second protrusion 192b.

[0169] (First protrusion 192a)

[0170] The plurality of first protrusions 192a are disposed closer to the effective pixel region RE1 than the plurality of second protrusions 192b. Each first protrusion 192a is an example of the first structure in the claims. The first protrusion 192a is the same as the protrusion 191 of the first embodiment. In addition, in the first embodiment, the first protrusion 192a may also be shorter than the protrusion 191.

[0171] (Second protrusion 192b)

[0172] The plurality of second protrusions 192b are arranged closer to the peripheral edge of the display device 101 than the plurality of first protrusions 192a. Each second protrusion 192b is an example of the second structure in the claims. The second protrusion 192b extends in a direction substantially perpendicular to the extending direction of the first protrusion 192a (i.e., substantially the same direction as the circumferential direction of the effective pixel region RE1) when viewed from above.

[0173] In this article, the direction substantially perpendicular to the extension direction refers to a direction that forms an angle between 80° and 100° with the extension direction, including 80° and 100°. For example, the angle formed between the extension direction and the direction substantially perpendicular to the extension direction may be between 82° and 98°, between 84° and 96°, between 85° and 95°, between 86° and 94°, between 87° and 93°, between 88° and 92°, between 89° and 91°, between 89.5° and 90.5°, or between 89.9° and 90.1°, including endpoints.

[0174] The plurality of second protrusions 192b have, for example, an elongated shape in a plan view. As a specific example of the elongated shape, a shape similar to the shape of the protrusion 191 in the first embodiment can be exemplified. The plurality of second protrusions 192b are arranged at intervals in a direction away from the effective pixel region RE1. In the case where the protrusion group 192 includes three or more second protrusions 192b, the distance between the second protrusions 192b adjacent to each other in a direction away from the effective pixel region RE1 may be constant or variable.

[0175] Among the plurality of second protrusions 192 b , the second protrusion 192 b closest to the effective pixel region RE1 may be separated from one end of each of the plurality of first protrusions 192 a or may be connected to one end of each of the plurality of first protrusions 192 a . Figure 5 An example is shown in which the second protrusion 192 b closest to the effective pixel region RE1 among the plurality of second protrusions 192 b is separated from the plurality of first protrusions.

[0176] [Function and Effect]

[0177] In the display device 102 according to the second embodiment, the plurality of protrusion groups 192 are arranged at intervals in the circumferential direction of the peripheral edge of the effective pixel region RE1. In addition, the plurality of first protrusions 192a included in the plurality of protrusion groups 192 extend in a direction away from the effective pixel region RE1 in a plan view, and are arranged at intervals in the circumferential direction around the effective pixel region RE1. With this configuration, as Figure 5As shown by arrows 31 in FIG. 1 , a current path (carrier path) can be formed between the protrusion groups 192 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 and between the first protrusions 192a adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1. Therefore, a current path in a direction away from the effective pixel region RE1 can be ensured while increasing the contact area between the cathode 123 and the contact electrode 19.

[0178] In the display device 102 according to the second embodiment, the plurality of second protrusions 192b included in the plurality of protrusion groups 192 extend in a direction substantially perpendicular to the extending direction of the first protrusions 192a in a plan view (i.e., in a direction substantially the same as the circumferential direction of the effective pixel region RE1) and are arranged at intervals in a direction away from the effective pixel region RE1. Figure 5 As shown by arrow 33, a current path (carrier path) can be formed between the second protrusions 192b adjacent to each other in a direction substantially perpendicular to the extending direction of the first protrusions 192a. Therefore, a current path in the circumferential direction of the effective pixel region RE1 can be ensured.

[0179] <5. Third Embodiment>

[0180] [Configuration of Display Device 103]

[0181] Figure 7 is a plan view of a display device 103 according to the third embodiment. Figure 8 yes Figure 7 An enlarged plan view of a portion of the surrounding area RE2. Fig. 9 is along Figure 7 The display device 103 is a cross-sectional view taken along the line IX-IX in FIG. 1 . The display device 103 is different from the display device 101 according to the first embodiment (see Figure 2 ) is different from that of FIG. 1 in that contact electrode 19 includes a plurality of protrusion groups 193 instead of a plurality of protrusions 191. Each protrusion group 193 is an example of a structural group in the claims.

[0182] (Protrusion group 193)

[0183] A plurality of protrusion groups 193 are arranged at intervals along the circumferential direction of the periphery of the effective pixel region RE1 (i.e., the circumferential direction of the contact electrode 19 in a plan view). The distance D between the protrusion groups 193 adjacent to each other in the circumferential direction of the periphery of the effective pixel region RE1 may be constant or variable. Each protrusion group 193 includes a plurality of protrusions 193a.

[0184] (Protrusion 193a)

[0185] The plurality of protrusions 193a may be two-dimensionally arranged in a predetermined arrangement pattern on the first surface of the contact electrode 19. The prescribed arrangement pattern may be a matrix pattern, a checkered pattern, etc., or may be another type of arrangement pattern.

[0186] In a plan view, the plurality of protrusions 193a may be arranged at intervals of D in a circumferential direction of the peripheral edge of the effective pixel region RE1. 21 The distance D between the protrusions 193a adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 is 21 Can be constant or variable.

[0187] In a plan view, the plurality of protrusions 193a may be spaced apart at intervals D in a direction away from the effective pixel region RE1. 22 The distance D between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1 is 22 The height of the plurality of protrusions 193a may be substantially the same or different.

[0188] For example, in a plan view, each protrusion 193a may have a dot shape. The dot shape may include, for example, a circle, an ellipse, and a polygon in a plan view, or may include other types of shapes. The protrusion 193a may have, for example, an approximately cylindrical shape, an approximately truncated cone shape, an approximately conical shape, or an approximately dome shape, or may have another type of shape. The plurality of protrusions 193a may include two or more types of protrusions 193a.

[0189] (Distance 11 , distance D 21 , distance D 22 relationship)

[0190] The distance D between the protrusion groups 193 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 is 11 It is preferable that the distance D between the protrusions 193a adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 is greater than the distance D between the protrusions 193a adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1. 21 With this configuration, the current flowing between the protrusion groups 193 adjacent to each other in the circumferential direction of the peripheral side of the effective pixel region RE1 increases compared to the current flowing between the protrusions 193 a adjacent to each other in the circumferential direction of the peripheral side of the effective pixel region RE1 .

[0191] From the viewpoint of ensuring a current path in a direction away from the effective pixel region RE1, the distance D between the protrusion groups 193 adjacent to each other in the circumferential direction around the effective pixel region RE1 is 11 and the distance D between the protrusions 193a adjacent to each other in the circumferential direction around the effective pixel region RE1.21 Preferably, 1.5×D 21 ≤D 11 , more preferably 2×D 21 ≤D 11 , and more preferably 3×D 21 ≤D 11 , 4×D 21 ≤D 11 , 5×D 21 ≤D 11 or 6×D 21 ≤D 11 From the viewpoint of suppressing a reduction in the contact area between the peripheral edge portion of the cathode 123 and the contact electrode 19, the distance D between the protrusion groups 193 adjacent to each other in the circumferential direction of the outer periphery of the effective pixel region RE1 is 11 and the distance D between the protrusions 193a adjacent to each other in the circumferential direction of the outer periphery of the effective pixel region RE1. 21 Preferably satisfy D 11 ≤10×D 21 .

[0192] The interval D between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1 is 22 The distance D between the protrusions 193a adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 may be 21 The interval D between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1 is the same as or different from that between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1. 22 It is preferably smaller than the distance D between the protrusion groups 193 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1. 11 With this configuration, a reduction in the number of the plurality of protrusion groups 193 included in each protrusion group 193 can be suppressed, and a reduction in the contact area between the peripheral edge portion of the cathode 123 and the contact electrode 19 can be suppressed.

[0193] [Function and Effect]

[0194] In the display device 103 according to the third embodiment, the contact electrode 19 includes a protrusion group 193 on the first surface. With this configuration, the contact area between the cathode 123 and the contact electrode 19 can be increased. A plurality of protrusion groups 193 are arranged at intervals in the circumferential direction around the effective pixel region RE1. With this configuration, a current path can be ensured between the protrusion groups 193 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1. Therefore, the display device 103 according to the third embodiment can ensure a current path in a direction away from the effective pixel region RE1 while increasing the contact area between the cathode 123 and the contact electrode 19.

[0195] <6. Fourth embodiment>

[0196] [Configuration of Display Device 104]

[0197] Fig.10 1 is a cross-sectional view of a display device 104 according to a fourth embodiment. The display device 104 includes a drive substrate 11, a plurality of light-emitting elements (first light-emitting elements) 12R, a plurality of light-emitting elements (second light-emitting elements) 12G, a plurality of light-emitting elements (third light-emitting elements) 12B, a common electrode 124, a first protective layer 21, a second protective layer 22, and a contact electrode 19. In addition, in the fourth embodiment, the same reference numerals are given to the same parts as in the first embodiment, and their description is omitted. It should be noted that in the following description, unless otherwise specified, the light-emitting elements 12R, 12G, and 12B are collectively referred to as the light-emitting element 12. In the fourth embodiment, the common electrode 124 is an example of the first electrode in the claims.

[0198] (Light Emitting Elements 12R, 12G, and 12B)

[0199] The emission colors of the light emitting element 12R, the light emitting element 12G, and the light emitting element 12B are different. The light emitting element 12R can emit red light under the control of a corresponding driving circuit, etc. The light emitting element 12G can emit green light under the control of a corresponding driving circuit, etc. The light emitting element 12B can emit blue light under the control of a corresponding driving circuit, etc. The light emitting element 12 is an organic light emitting diode (OLED) element. The light emitting element 12R includes a sub-pixel 10R. The light emitting element 12G includes a sub-pixel 10G. The light emitting element 12B includes a sub-pixel 10B.

[0200] The plurality of light emitting elements 12 are two-dimensionally arranged in a predetermined arrangement pattern on the first surface of the drive substrate 11. The predetermined arrangement pattern is the same as the predetermined arrangement pattern of the plurality of sub-pixels 10 in the first embodiment.

[0201] The light emitting element 12R includes an anode 121, an OLED layer 122R, and a cathode 126 in sequence on the first surface of the drive substrate 11. The light emitting element 12G includes an anode 121, an OLED layer 122G, and a cathode 126 in sequence on the first surface of the drive substrate 11. The light emitting element 12B includes an anode 121, an OLED layer 122B, and a cathode 126 in sequence on the first surface of the drive substrate 11. In the fourth embodiment, one of the anode 121 or the cathode 126 is an example of the third electrode in the claims, and the other is an example of the fourth electrode in the claims.

[0202] (OLED layers 122R, 122G, 122B)

[0203] OLED layer 122R may emit red light. OLED layer 122G may emit green light. OLED layer 122B may emit blue light.

[0204] The OLED layers 122R, 122G, and 122B are each disposed between the anode 121 and the cathode 126. The OLED layer 122R includes an organic light-emitting layer capable of emitting red light (hereinafter, referred to as a "red organic light-emitting layer"). The OLED layer 122R includes an organic light-emitting layer capable of emitting green light (hereinafter, referred to as a "green organic light-emitting layer"). The OLED layer 122B includes an organic light-emitting layer capable of emitting blue light (hereinafter, referred to as a "blue organic light-emitting layer"). In the following description, unless otherwise specified, in the case where the red organic light-emitting layer, the green organic light-emitting layer, and the blue organic light-emitting layer are collectively referred to as organic light-emitting layers.

[0205] OLED layers 122R, 122G, and 112B may each include a laminate including an organic light-emitting layer, and in this case, the layer of the laminate (e.g., an electron injection layer) may be an inorganic layer. OLED layer 122R includes, for example, a hole injection layer, a hole transport layer, a red organic light-emitting layer, an electron transport layer, and an electron injection layer from anode 121 to cathode 126. OLED layer 122G includes, for example, a hole injection layer, a hole transport layer, a green organic light-emitting layer, an electron transport layer, and an electron injection layer from anode 121 to cathode 126. OLED layer 122G includes, for example, a hole injection layer, a hole transport layer, a blue organic light-emitting layer, an electron transport layer, and an electron injection layer from anode 121 to cathode 126.

[0206] The red organic light emitting layer may emit red light by recombination of holes injected from the anode 121 and electrons injected from the cathode 126. The green organic light emitting layer may emit green light based on a principle similar to that of the red organic light emitting layer. The blue organic light emitting layer may emit blue light based on a principle similar to that of the red organic light emitting layer.

[0207] (Cathode 123)

[0208] The cathode 126 is an individual electrode provided for each of the plurality of light emitting elements 12W in the effective pixel region RE1. That is, in the effective pixel region RE1, the anode 121 is between the light emitting elements 12 separated from each other in the in-plane direction of the first surface of the drive substrate 11. The cathode 126 is similar to the cathode 123 in the first embodiment in other respects.

[0209] (First protective layer 21, second protective layer 22)

[0210] The first protective layer 21 and the second protective layer 22 have transparency to each color of light emitted from the light emitting elements 12R, 12G, and 12B. The first protective layer 21 and the second protective layer 22 preferably have transparency to visible light. The first protective layer 21 and the second protective layer 22 may protect the plurality of light emitting elements 12, etc. For example, the first protective layer 21 and the second protective layer 22 may block the plurality of light emitting elements 12 from the outside air to inhibit moisture from entering the plurality of light emitting elements 12 from the outside environment.

[0211] The first protective layer 21 is disposed on the first surface of the drive substrate 11 to cover the plurality of light emitting elements 12. The first protective layer 21 includes a plurality of contact holes 21H that pass through the first protective layer 21 in the thickness direction. The contact holes 21H may be disposed in the light emitting region of the light emitting element 12 when viewed from above, or may be disposed outside the light emitting region of the light emitting element 12 when viewed from above. Fig.10 An example is shown in which each contact hole 21H is disposed outside the light emitting region of the corresponding light emitting element 12 in a plan view. The second protective layer 22 is disposed on the first surface of the common electrode 124.

[0212] As materials included in the first protective layer 21 and the second protective layer 22, materials similar to those of the protective layer 14 in the first embodiment can be exemplified. The materials included in the first protective layer 21 and the second protective layer 22 may be the same or different.

[0213] (Common electrode 124)

[0214] The common electrode 124 is disposed on the first surface of the first protective layer 21. The common electrode 124 is an electrode that extends across the light emitting elements 12 adjacent to each other in the effective pixel region RE1 and is shared by a plurality of light emitting elements 12 disposed in the display region 110A. The common electrode 124 has transparency to each light emitted from the light emitting elements 12R, 12G, and 12B. Preferably, the common electrode 124 has transparency to visible light. The common electrode 124 extends from the effective pixel region RE1 to the surrounding region RE2. A peripheral edge portion of the second surface of the common electrode 124 is connected to the first surface of the contact electrode 19. The peripheral edge portion of the common electrode 124 may be disposed on the first surface of the contact electrode 19 to follow the plurality of protrusions 191.

[0215] The common electrode 124 is connected to each cathode 126 separated for each sub-pixel 10. Specifically, the common electrode 124 includes a plurality of contacts 125, each of which is disposed in a corresponding contact hole 21H of the first protective layer 1. With this configuration, each of the plurality of contacts 125 has its tip connected to the first surface of the corresponding cathode 126 separated for each sub-pixel 10.

[0216] [Function and Effect]

[0217] In the fourth embodiment, the peripheral edge portion of the common electrode 124 is connected to the contact electrode 19. The contact electrode 19 includes the plurality of protrusions 191 described in the first embodiment on the first surface. Therefore, a current path in a direction away from the effective pixel region RE1 can be ensured while increasing the contact area between the peripheral edge portion of the common electrode 124 and the contact electrode 19.

[0218] <7. Fifth embodiment>

[0219] [Configuration of Display Device 105]

[0220] Fig.11 1 is a cross-sectional view of a display device 105 according to a fifth embodiment. The display device 105 is similar to the display device 101 according to the first embodiment (see Figure 3 ) is different in that it further includes a planarization layer 23 and a lens array 24.

[0221] (Planarization layer 23)

[0222] The planarization layer 23 is disposed on the first surface of the color filter 15. The planarization layer 23 has a flat first surface. The planarization layer 23 can fill irregularities on the first surface of the color filter 15 to form a flat first surface over the color filter 15. The planarization layer 23 includes, for example, an inorganic material or a polymer resin. As the inorganic material, a material similar to the inorganic material of the protective layer 14 can be exemplified. As the polymer resin, a material similar to the polymer resin of the protective layer 14 can be exemplified.

[0223] (Lens array 24)

[0224] The lens array 24 is disposed on the first surface of the planarization layer 23. The lens array 24 includes a plurality of lenses 241. Each lens 241 can collect light emitted upward from the corresponding light emitting element 12W in the front direction. The plurality of lenses 241 are so-called on-chip microlenses (OCL) and are two-dimensionally arranged on the first surface of the planarization layer 23 in a prescribed arrangement pattern.

[0225] A single lens 241 may be provided over each light emitting element 12W, or two or more lenses 241 may be provided over each light emitting element 12W. Fig.11 An example of providing a single lens 241 above each light emitting element 12W is shown. The lens 241 may have a curved emitting surface from which light incident from the light emitting element 12W is emitted. The curved surface may be a convex surface curved in a direction away from the light emitting element 12W or a concave surface curved in a direction approaching the light emitting element 12W. Examples of the curved surface include, but are not limited to, an approximately parabolic shape, an approximately hemispherical shape, an approximately semi-elliptical shape, and the like.

[0226] The lens array 24 includes, for example, an inorganic material or a polymer resin that is transparent to visible light. The inorganic material includes, for example, silicon oxide (SiO x ). Examples of the polymer resin include ultraviolet curing resins.

[0227] (Filling resin layer 16)

[0228] In the fifth embodiment, the filling resin layer 16 covers the lens array 24. The refractive index of the filling resin layer 16 is different from that of the lens array 24. The refractive index of the filling resin layer 16 may be higher or lower than that of the lens array 24. In the case where the lens 241 has a convex emitting surface, the refractive index of the filling resin layer 16 is preferably lower than that of the lens array 24 from the viewpoint of improving the front brightness. In the case where the lens 241 has a concave emitting surface, the refractive index of the filling resin layer 16 is preferably higher than that of the lens array 24 from the viewpoint of improving the front brightness.

[0229] [Function and Effect]

[0230] In the fifth embodiment, the lens array 24 is provided above the plurality of light emitting elements 12. With this configuration, light emitted upward from the light emitting elements 12W can be collected in the front direction by the lens array 24. Therefore, the front brightness of the display device 105 can be improved.

[0231] <8. Modifications>

[0232] (Variant 1)

[0233] The display device 101 according to the first embodiment may include a plurality of protrusions 191 having the following configuration. Fig.12 As shown, the distance D between the protrusions 191 adjacent to each other on the inner circumference side of the peripheral region RE2 may be greater than the distance D between the protrusions 191 adjacent to each other on the outer circumference side of the peripheral region RE2. The distance D between the protrusions 191 adjacent to each other may gradually increase from the peripheral edge of the peripheral region RE2 toward the inner circumference of the peripheral region RE2.

[0234] In a plan view, each protrusion 191 may have a side surface inclined relative to the peripheral edge of the effective pixel region RE1. In a plan view, the width of the protrusion 191 may gradually decrease from the peripheral edge of the peripheral region RE2 toward the inner periphery of the peripheral region RE2. Here, the width of the protrusion 191 represents the size of the protrusion 191 in a direction perpendicular to the extension direction of the protrusion 191. The protrusion 191 may have, for example, a triangular shape or a trapezoidal shape in a plan view, or may have another type of shape. For example, the triangular shape may be an isosceles triangle. In the case where the protrusion 191 has a triangular shape in a plan view, one vertex of the triangular shape may be located on the inner peripheral side of the peripheral region RE2, and the remaining two vertices may be located on the outer peripheral side of the peripheral region RE2. In the case where the protrusion 191 has a trapezoidal shape in a plan view, the upper base of the trapezoidal shape may be located on the inner peripheral side of the peripheral region RE2, and the lower base may be located on the outer peripheral side of the peripheral region RE2.

[0235] In the display device 101 according to Modification 1, the distance D between the protrusions 191 adjacent to each other on the inner circumference side of the peripheral region RE2 is greater than the distance D between the protrusions 191 adjacent to each other on the outer circumference side of the peripheral region RE2. With this configuration, the current flowing from the effective pixel region RE1 to the peripheral region RE2 becomes easy to flow between the protrusions 191 adjacent to each other in the circumferential direction of the peripheral side of the effective pixel region RE1. Therefore, a good current path (carrier path) can be formed between the protrusions 191 adjacent to each other in the circumferential direction of the peripheral side of the effective pixel region RE1.

[0236] The display device 102 according to the second embodiment may include a plurality of protrusions 192a having the same configuration as the plurality of protrusions 191 described in Modification 1. The display devices 104 and 105 according to the fourth and fifth embodiments may include the plurality of protrusions 191 described in Modification 1.

[0237] (Variant 2)

[0238] In the first embodiment, the fourth embodiment, and the fifth embodiment, the example in which the contact electrode 19 includes the plurality of protrusions 191 as the plurality of structures on the first surface has been described, however, Fig.13 As shown, the contact electrode 19 may include a plurality of recesses 194 as a plurality of structures on the first surface, or may include a plurality of protrusions 191 and a plurality of recesses 194 as a plurality of structures. The recesses 194 are structures obtained by inverting the protrusions 191.

[0239] In the second embodiment, the example in which the contact electrode 19 includes the plurality of protrusion groups 192 as the plurality of structure groups on the first surface has been described, but the contact electrode 19 may include the plurality of recess groups as the plurality of structure groups on the first surface, or may include the plurality of protrusion groups 192 and the plurality of recess groups as the plurality of structure groups on the first surface. The recess groups are structure groups obtained by inverting the protrusion groups 192.

[0240] In the second embodiment, an example has been described in which the structure group includes a plurality of first protrusions 192a and a plurality of second protrusions 192b, but the structure group may include a plurality of first recesses instead of the plurality of first protrusions 192a, or a plurality of second recesses instead of the plurality of second protrusions 192b. The first recess is a structure obtained by inverting the first protrusion 192a, and the second recess is a structure obtained by inverting the second protrusion 192b.

[0241] In the second embodiment, an example has been described in which the structure group includes a plurality of first protrusions 192a as a plurality of first structures, but the structure group may include a plurality of first protrusions 192a and a plurality of first recesses as a plurality of first structures. The first recess is a structure obtained by inverting the first protrusion 192a as described above.

[0242] In the second embodiment, the example in which the structure group includes the plurality of second protrusions 192b as the plurality of second structures has been described, but the structure group may include the plurality of second protrusions 192b and the plurality of second recesses as the plurality of second structures. The second recess is a structure obtained by flipping the second protrusion 192b as described above.

[0243] In the third embodiment, the example in which the contact electrode 19 includes the plurality of protrusion groups 193 as the plurality of structure groups on the first surface has been described, but the contact electrode 19 may include the plurality of recess groups as the plurality of structure groups on the first surface, or may include the plurality of protrusion groups 193 and the plurality of recess groups as the plurality of structure groups on the first surface. The recess group is a structure group obtained by inverting the protrusion group 193. The depths of the plurality of recesses included in the recess group may be substantially the same or different.

[0244] In the third embodiment, an example has been described in which the structure group includes the plurality of protrusions 193a, but the structure group may include the plurality of protrusions 193a and the plurality of recesses. The recess is a structure obtained by inverting the protrusion 193a.

[0245] (Variant 3)

[0246] In the third embodiment, the example in which the plurality of protrusion groups 193 are arranged at intervals in the circumferential direction of the peripheral edge of the effective pixel region RE1 has been described. However, Fig.14As shown, the plurality of protrusion groups 193 may be arranged in two dimensions. Specifically, the plurality of protrusion groups 193 may be arranged at intervals in the circumferential direction of the peripheral edge of the effective pixel region RE1, and may be arranged at intervals in the direction away from the effective pixel region RE1. The distance D between the protrusion groups 193 adjacent to each other in the circumferential direction of the peripheral edge of the effective pixel region RE1 is 11 The distance D between the protrusion groups 193 adjacent to each other in the direction away from the effective pixel region RE1 may be constant or variable. 12 Can be constant or variable.

[0247] The distance D between the protrusion groups 193 adjacent to each other in the direction away from the effective pixel region RE1 is 12 It is preferably greater than the distance D between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1. 22 With this configuration, the current flowing through the protrusion groups 193 adjacent to each other in the direction away from the effective pixel region RE1 is improved compared to the current flowing through the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1. Fig.14 , an arrow 34 represents an image of a current path formed between the protrusion groups 193 adjacent to each other in a direction away from the effective pixel region RE1.

[0248] From the viewpoint of ensuring a current path in a direction away from the effective pixel region RE1, the distance D between the protrusion groups 193 adjacent to each other in the direction away from the effective pixel region RE1 is 12 and the distance D between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1. 22 Preferably, 1.5×D 22 ≤D 12 , more preferably 2×D 22 ≤D 12 , and more preferably 3×D 22 ≤D 12 , 4×D 22 ≤D 12 , 5×D 22 ≤D 12 or 6×D 22 ≤D 12 From the viewpoint of suppressing a reduction in the contact area between the peripheral edge portion of the cathode 123 and the contact electrode 19, the distance D between the protrusion groups 193 adjacent to each other in the direction away from the effective pixel region RE1 is 12 and the distance D between the protrusions 193a adjacent to each other in the direction away from the effective pixel region RE1. 22 Preferably satisfy D 12 ≤10×D 22 .

[0249] (Variant 4)

[0250] In a third embodiment, if Fig.15 As shown, the height of the plurality of protrusions 193a provided on the inner circumference side of the peripheral region RE2 may be less than the height of the plurality of protrusions 193a provided on the outer circumference side of the peripheral region RE2. More specifically, for example, the height of the plurality of protrusions 193a may be gradually reduced from the periphery of the peripheral region RE2 to the inner circumference of the peripheral region RE2. In this case, it is possible to prevent the peripheral edge portion of the cathode 123 from being cut off by the steps of the plurality of protrusions 193a or to prevent the peripheral edge portion of the cathode 123 from being thinned by the steps of the plurality of protrusions 193a. Therefore, it becomes easier to ensure a current path (carrier path) in a direction away from the effective pixel region RE1.

[0251] In the second embodiment, the heights of the plurality of first protrusions 192 a and the plurality of second protrusions 192 b may be varied in a manner similar to the plurality of protrusions 193 a described in Modification 4.

[0252] As described in Modification 2, in the case where the contact electrode 19 includes a plurality of recess groups as a plurality of structural groups on the first surface, the depth of the plurality of recesses provided on the inner peripheral side of the peripheral region RE2 may be less than the depth of the plurality of recesses provided on the outer peripheral side of the peripheral region RE2. More specifically, for example, the depth of the plurality of recesses may gradually decrease from the periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2. In this case, it is possible to prevent the peripheral edge portion of the cathode 123 from being cut off by the steps of the plurality of recesses or to prevent the electrode at the peripheral edge portion of the cathode 123 from being thinned by the steps of the plurality of recesses. Therefore, it becomes easier to ensure a current path (carrier path) in a direction away from the effective pixel region RE1.

[0253] (Variant 5)

[0254] In a third embodiment, if Fig.16 As shown, the plurality of protrusions 193a may each have at least one step. The heights of the plurality of protrusions 193a may be the same or different. The number of steps of the plurality of protrusions 193a disposed on the inner peripheral side of the peripheral region RE2 may be greater than the number of steps of the plurality of protrusions 193a disposed on the outer peripheral side of the peripheral region RE2. With this configuration, the steps of the plurality of protrusions 193a disposed on the inner peripheral side of the peripheral region RE2 can be made smaller than the steps of the plurality of protrusions 193a disposed on the outer peripheral side of the peripheral region RE2. Therefore, it is possible to prevent the peripheral edge portion of the cathode 123 from being cut off by the steps of the plurality of protrusions 193a or to prevent the peripheral edge portion of the cathode 123 from being thinned by the steps of the plurality of protrusions 193a. Therefore, it becomes easier to ensure a current path (carrier path) in a direction away from the effective pixel region RE1.

[0255] The number of steps of the plurality of protrusions 193a may gradually increase from the periphery of the peripheral region RE2 to the inner periphery of the peripheral region RE2. With this configuration, the height of the steps of the plurality of protrusions 193a may gradually decrease from the periphery of the peripheral region RE2 to the inner periphery of the peripheral region RE2.

[0256] (Variant 6)

[0257] In the third embodiment, the inclination angles θ of the side surfaces of the plurality of protrusions 193a may be different, such as Fig.17 As shown. The inclination angle θ of the side surface of the plurality of protrusions 193a disposed on the inner peripheral side of the peripheral region RE2 may be smaller than the inclination angle θ of the side surface of the plurality of protrusions 193a disposed on the outer peripheral side of the peripheral region RE2. More specifically, for example, the inclination angle θ of the plurality of protrusions 193a may gradually decrease from the periphery of the peripheral region RE2 to the inner periphery of the peripheral region RE2. In this case, it is possible to prevent the peripheral edge portion of the cathode 123 from being cut off by the side surface of the plurality of protrusions 193a or to prevent the peripheral edge portion of the cathode 123 from being thinned by the side surface of the plurality of protrusions 193a. Therefore, it becomes easier to ensure a current path (carrier path) in a direction away from the effective pixel region RE1.

[0258] As described in Modification 2, in the case where the contact electrode 19 includes a plurality of recess groups as a plurality of structure groups on the first surface, the inclination angles θ of the side surfaces of the plurality of recesses may be different. The inclination angles θ of the side surfaces of the plurality of recesses disposed on the inner circumference side of the peripheral region RE2 may be smaller than the inclination angles θ of the side surfaces of the plurality of recesses disposed on the outer circumference side of the peripheral region RE2. More specifically, for example, the inclination angles θ of the plurality of recesses may gradually decrease from the periphery of the peripheral region RE2 toward the inner circumference of the peripheral region RE2.

[0259] (Variant 7)

[0260] In the first to fifth embodiments, an example in which the light emitting element is an OLED element has been described, but the light emitting element is not limited to this example and may be, for example, a self-luminous light emitting element such as a light emitting diode (LED), an inorganic electroluminescent (IEL) element, or a semiconductor laser element. The display device may include two or more types of light emitting elements.

[0261] (Variant 8)

[0262] In the first to fifth embodiments, examples have been described in which the light emitting device is a display device, but the light emitting device is not limited to a display device and may be a lighting device or the like.

[0263] (Variant 9)

[0264] In the fourth embodiment, an example has been described in which the display device 101 according to the first embodiment includes a plurality of light emitting elements 12R, 12G, and 12B instead of the plurality of light emitting elements 12W and the color filter 15. However, the present disclosure is not limited to this example, and for example, the display devices 102, 103, and 104 according to the second, third, and fourth embodiments may each include a plurality of light emitting elements 12R, 12G, and 12B instead of the plurality of light emitting elements 12W and the color filter 15.

[0265] (Variant 10)

[0266] In the first, second, third and fifth embodiments, examples have been described in which the anode 121 and the cathode 123 are an independent electrode (second electrode) and a common electrode (first electrode), respectively, and the peripheral edge portion of the cathode 123 is connected to the contact electrode 19, but the anode 121 and the cathode 123 may be a common electrode (first electrode) and an independent electrode (second electrode), respectively, and the peripheral edge portion of the anode 121 may be connected to the contact electrode 19. In this case, the positions of the anode 121 and the cathode 123 may be interchanged.

[0267] In the fourth embodiment, an example has been described in which the anode 121 and the cathode 126 are an independent electrode (third electrode) and an independent electrode (fourth electrode), respectively, and a plurality of cathodes 126 are connected to the common electrode 124, but the anode 121 and the cathode 126 are an independent electrode (third electrode) and an independent electrode (fourth electrode), respectively, and a plurality of anodes 121 may be connected to the common electrode 124. In this case, the positions of the anode 121 and the cathode 123 may be interchanged.

[0268] (Variant 11)

[0269] In addition, in the second embodiment, an example in which the first protrusion 192a is the same as the protrusion 191 of the first embodiment is described, but the first protrusion 192a may not be the same as the protrusion 191 of the first embodiment. For example, the first protrusion 192a may have a dot shape in a plan view. In this case, a plurality of first protrusions 192a may be arranged one-dimensionally or two-dimensionally. In the case of a one-dimensional arrangement, a plurality of first protrusions 192a may be arranged at intervals in the circumferential direction around the effective pixel region RE1. In the case of a two-dimensional arrangement, a plurality of first protrusions 192a may be arranged two-dimensionally in a manner similar to the plurality of protrusions 193a in the third embodiment.

[0270] (Variant 12)

[0271] In the fourth embodiment, the display device 104 may further include a filling resin layer 16, a sealing portion 17, and a cover glass 18. In this case, the filling resin layer 16 and the sealing portion 17 may be provided on the first surface of the second protective layer 22.

[0272] (Variant 13)

[0273] In the first embodiment, the second embodiment, the third embodiment and the fifth embodiment, the example of setting the color filter 15 has been described, but a quantum dot layer may be provided instead of the color filter 15, or a quantum dot layer may be provided together with the color filter 15. The quantum dot layer includes quantum dots (semiconductor particles) and can convert the color of light emitted by a plurality of light-emitting elements. As a plurality of light-emitting elements, a plurality of light-emitting elements 20B may be provided instead of a plurality of light-emitting elements 20W.

[0274] (Other Modifications)

[0275] Although the first to fifth embodiments and modifications thereof of the present disclosure are specifically described above, the present disclosure is not limited to the above-described first to fifth embodiments and modifications thereof, and various modifications based on the technical idea of ​​the present disclosure are possible.

[0276] For example, the configurations, methods, processes, shapes, materials, numerical values, etc. mentioned in the above-mentioned first to fifth embodiments and their modified examples are merely examples, and different configurations, methods, processes, shapes, materials, numerical values, etc. may be used as needed.

[0277] For example, the configurations, methods, processes, shapes, materials, numerical values, and the like of the above-described first to fifth embodiments and their modified examples may be combined with one another without departing from the gist of the present disclosure.

[0278] For example, the materials exemplified in the above-mentioned first to fifth embodiments and their modified examples may be used alone or in combination of two or more, unless otherwise specified.

[0279] Furthermore, the present disclosure may also adopt the following configurations. (1)

[0281] A light emitting device, comprising:

[0282] a plurality of light emitting elements in the light emitting area;

[0283] a contact electrode disposed in a peripheral region surrounding the light emitting region; and

[0284] a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode, wherein

[0285] The contact electrode includes a plurality of first structures at a portion connected to the first electrode, and

[0286] The plurality of first structures extend in a direction away from the light emitting area. (2)

[0288] The light emitting device according to (1) or (2), wherein:

[0289] The plurality of first structures include at least one of a plurality of first recesses or a plurality of first protrusions. (3)

[0291] The light emitting device according to (1) or (2), wherein:

[0292] The contact electrode has a ring shape surrounding the light emitting area. (4)

[0294] The light emitting device according to any one of (1) to (3), wherein:

[0295] The direction away from the light emitting area includes a direction perpendicular to the periphery of the light emitting area or a direction inclined to the periphery of the light emitting area. (5)

[0297] The light emitting device according to any one of (1) to (4), wherein:

[0298] A plurality of the first structures are arranged in a circumferential direction of the periphery of the light emitting area, and

[0299] A distance between the first structures adjacent to each other on the inner peripheral side of the peripheral zone is greater than a distance between the first structures adjacent to each other on the outer peripheral side of the peripheral zone. (6)

[0301] The light emitting device according to any one of (1) to (5), wherein:

[0302] The contact electrode further includes a plurality of second structures at a portion where the first electrode is connected,

[0303] The plurality of second structures extend in a direction substantially perpendicular to the extending direction of the first structures, and

[0304] The plurality of first structures are disposed closer to the light emitting region than the plurality of second structures. (7)

[0306] The light emitting device according to any one of (1) to (6), wherein:

[0307] The light emitting area includes an effective pixel area, and

[0308] The first electrode includes a cathode. (8)

[0310] The light emitting device according to any one of (1) to (7), further comprising:

[0311] A plurality of second electrodes disposed in the light emitting region; and

[0312] The organic light-emitting layer is arranged between the plurality of the second electrodes and the first electrode. (9)

[0314] The light emitting device according to any one of (1) to (7), further comprising:

[0315] providing a plurality of third electrodes in the light emitting region;

[0316] A plurality of fourth electrodes disposed in the light emitting region; and

[0317] A plurality of organic light-emitting layers are arranged in the light-emitting region, wherein:

[0318] Each of the organic light emitting layers is disposed between a corresponding one of the third electrodes and a corresponding one of the fourth electrodes, and

[0319] The first electrode is connected to the plurality of fourth electrodes. (10)

[0321] A light emitting device, comprising:

[0322] a plurality of light emitting elements in the light emitting area;

[0323] a contact electrode disposed in a peripheral region surrounding the light emitting region; and

[0324] a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode, wherein

[0325] The contact electrode includes a plurality of structure groups at a portion connected to the first electrode,

[0326] A plurality of the structure groups are arranged at least in the circumferential direction of the outer periphery of the light emitting area,

[0327] Each of the structure groups includes a plurality of structures, and

[0328] Structural groups adjacent to each other in the circumferential direction are separated from each other. (11)

[0330] The light emitting device according to (10), wherein:

[0331] The plurality of structures include at least one of a plurality of recesses or a plurality of protrusions. (12)

[0333] The light emitting device according to (10) or (11), wherein:

[0334] The distance between the structure groups adjacent to each other in the circumferential direction is greater than the distance between the structures adjacent to each other. (13)

[0336] The light emitting device according to (10) or (11), wherein:

[0337] A plurality of the structures are arranged two-dimensionally in the circumferential direction and in a direction substantially perpendicular to the circumferential direction, and

[0338] The distance between the structure groups adjacent to each other in the circumferential direction is greater than the distance between the structures adjacent to each other in the circumferential direction. (14)

[0340] The light emitting device according to (10) or (11), wherein:

[0341] A plurality of the structure groups are arranged two-dimensionally in the circumferential direction and in a direction substantially perpendicular to the circumferential direction, and

[0342] Structural groups adjacent to each other in a direction substantially perpendicular to the circumferential direction are separated from each other. (15)

[0344] The light-emitting device according to (14), wherein:

[0345] The plurality of structures are arranged two-dimensionally in the circumferential direction and in a direction substantially perpendicular to the circumferential direction.

[0346] The distance between the groups of structures adjacent to each other in the circumferential direction is greater than the distance between the structures adjacent to each other in the circumferential direction, and

[0347] A distance between the groups of structures adjacent to each other in a direction substantially perpendicular to the circumferential direction is greater than a distance between the structures adjacent to each other in a direction substantially perpendicular to the circumferential direction. (16)

[0349] The light emitting device according to (11), wherein:

[0350] arranging a plurality of said structures two-dimensionally;

[0351] The plurality of recesses become shallower from the outer periphery to the inner periphery of the peripheral zone, and

[0352] The plurality of protrusions become lower from the outer periphery toward the inner periphery of the peripheral region. (17)

[0354] The light emitting device according to any one of (10) to (15), wherein:

[0355] arranging a plurality of said structures two-dimensionally;

[0356] A plurality of said structures have at least one step, and

[0357] The number of steps of the plurality of structures increases from the outer circumference to the inner circumference of the peripheral area. (18)

[0359] The light emitting device according to any one of (10) to (15), wherein:

[0360] arranging a plurality of said structures two-dimensionally; and

[0361] The inclination angles of the side surfaces of the plurality of structures decrease from the outer periphery to the inner periphery of the peripheral area. (19)

[0363] The light emitting device according to any one of (10) to (18), wherein:

[0364] A plurality of the structures have a dot shape in a plan view. (20)

[0366] An electronic device comprises the light emitting device according to any one of (1) to (19).

[0367] <9. Relationship between Normal Lines Passing Through Centers of Light Emitting Unit, Lens Member, and Wavelength Selecting Unit>

[0368] Hereinafter, the relationship between the normal line LN passing through the center of the light emitting unit, the normal line LN′ passing through the center of the lens member, and the normal line LN″ passing through the center of the wavelength selection unit will be described. Here, the light emitting unit is, for example, the light emitting element 12W, the light emitting element 12R, the light emitting element 12G, or the light emitting element 12B. The lens member is, for example, the lens 241 of the lens array 24. The wavelength selection unit is, for example, the filter portion 15F.

[0369] It should be noted that the size of the wavelength selection unit can be appropriately changed according to the light emitted from the light emitting unit, or in the case where the light absorbing unit (e.g., black matrix unit) is provided between the wavelength selection units of adjacent light emitting units, the size of the light absorbing unit can be appropriately changed according to the light emitted from the light emitting unit. In addition, the size of the wavelength selection unit can be appropriately changed according to the distance (offset) d0 between the normal line passing through the center of the light emitting unit and the normal line passing through the center of the wavelength selection unit. The planar shape of the wavelength selection unit can be the same as, similar to, or different from the planar shape of the lens member.

[0370] In the following, reference Fig.18 A. Fig.18 B. Fig.18 C, and Fig.19 , the relationship between the normal line passing through the center of each unit in the case where the light emitting unit 51, the wavelength selecting unit 52, and the lens member 53 are arranged in this order will be described.

[0371] like Fig.18 As shown in A, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 can be consistent with each other. That is, D0=0 and d0=0 can be satisfied. Here, D0 represents the distance (offset) between the normal line LN passing through the center of the light emitting unit 51 and the normal line LN' passing through the center of the lens member 53, and d0 represents the distance (offset) between the normal line LN passing through the center of the light emitting unit 51 and the normal line LN" passing through the center of the wavelength selection unit 52.

[0372] like Fig.18 As shown in B, the normal line LN passing through the center of the light emitting unit 51 and the normal line LN" passing through the center of the wavelength selection unit 52 are consistent with each other, but the normal line LN passing through the center of the light emitting unit 51 and the normal line LN" passing through the center of the wavelength selection unit 52 do not need to be consistent with the normal line LN' passing through the center of the lens member 53. That is, D0>0 and d0=0 can be satisfied.

[0373] like Fig.18 As shown in C, the normal line LN passing through the center of the light emitting unit 51 does not have to coincide with the normal line LN" passing through the center of the wavelength selection unit 52 or the normal line LN' passing through the center of the lens member 53, and the normal line LN" passing through the center of the wavelength selection unit 52 may coincide with the normal line LN' passing through the center of the lens member 53. That is, D0>0, d0>0 and D0=d0 may be satisfied.

[0374] like Fig.19 As shown in FIG. 5 , the normal line LN passing through the center of the light emitting unit 51, the normal line LN″ passing through the center of the wavelength selection unit 52, and the normal line LN′ passing through the center of the lens member 53 do not need to coincide with each other. That is, D0>0, d0>0, and D0≠d0 may be satisfied. Here, the center of the wavelength selection unit 52 (given by Fig.19 The position indicated by the black square in FIG. 1 is preferably located at a position connecting the center of the light emitting unit 51 and the center of the lens member 53 (indicated by Fig.19 Specifically, the distance between the center of the light emitting unit 51 and the center of the wavelength selection unit 52 in the thickness direction ( Fig.19The distance in the vertical direction in the wavelength selection unit 52 is represented as LL1, and the distance between the center of the wavelength selection unit 52 and the center of the lens member 53 in the thickness direction is represented as LL2. It is preferred that:

[0375] D0>d0>0

[0376] Satisfy and consider manufacturing changes,

[0377] d0:D0=LL1:(LL1+LL2)

[0378] satisfy.

[0379] Here, the thickness direction indicates the thickness direction of the light emitting unit 51 , the wavelength selecting unit 52 , and the lens member 53 .

[0380] In the following, reference is made to Fig. 20 A. Fig. 20 B and Fig.21 , the relationship between the normal lines passing through the center of each unit in the case where the light emitting unit 51, the lens member 53, and the wavelength selection unit 52 are arranged in this order will be described.

[0381] like Fig. 20 As shown in A, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 may coincide with each other. That is, D0>0 and d0=0 may be satisfied.

[0382] like Fig. 20 As shown in B, the normal line LN passing through the center of the light emitting unit 51 does not have to coincide with the normal line LN" passing through the center of the wavelength selection unit 52 or the normal line LN' passing through the center of the lens member 53, and the normal line LN" passing through the center of the wavelength selection unit 52 may coincide with the normal line LN' passing through the center of the lens member 53. That is, D0>0, d0>0 and D0=d0 may be satisfied.

[0383] like Fig.21 As shown, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 do not need to coincide with each other. Here, the center of the lens member 53 ( Fig.21 The position indicated by the black circle in FIG. 5 is preferably located at the center of the connecting light emitting unit 51 and the center of the wavelength selection unit 52 ( Fig.21 Specifically, the distance between the center of the light emitting unit 51 and the center of the lens member 53 in the thickness direction ( Fig.21The distance in the vertical direction in the wavelength selection unit 52 is represented as LL2, and the distance between the center of the lens unit 53 and the center of the wavelength selection unit 52 in the thickness direction is represented as LL1. It is preferred that:

[0384] d0>D0>0

[0385] meets, and taking into account manufacturing variations,

[0386] D0:d0=LL2:(LL1+LL2)

[0387] satisfy.

[0388] Here, the thickness direction indicates the thickness direction of the light emitting unit 51 , the wavelength selecting unit 52 , and the lens member 53 .

[0389] <10. Example of resonator structure>

[0390] The pixel used in the display device according to the present disclosure may have a resonator structure that resonates the light generated by the light emitting element. Hereinafter, the resonator structure will be described with reference to the accompanying drawings. In addition, in the following description, the first surface of each layer may be referred to as an upper surface.

[0391] (Resonator Structure: First Example)

[0392] Fig. 22 A is a schematic cross-sectional view for describing a first example of a resonator structure. In the following description, unless otherwise distinguished, the light-emitting elements provided corresponding to the sub-pixels 10R, 10G, and 10B may be collectively referred to as the light-emitting elements 12. In the case where the light-emitting elements provided corresponding to the sub-pixels 10R, 10G, and 10B are distinguished, they may be referred to as the light-emitting elements 12. R , 12 G and 12 B The portions of the OLED layer 122 corresponding to the sub-pixels 10R, 10G, and 10B may be referred to as the OLED layer 122, respectively. R , OLED layer 122 G and OLED layer 122 B The anode 121 and the cathode 123 may be referred to as a first electrode 121 and a second electrode 123, respectively. The light emitting element may be the light emitting element 12W in the first, second, third, and fifth embodiments, or may be the light emitting elements 12R, 12G, and 12B in the fourth embodiment.

[0393] In the first example, the first electrode 121 is formed with a common film thickness in each light emitting element 12. The same applies to the second electrode 123.

[0394] The reflector 71 is arranged below the first electrode 121 of the light emitting element 12, with the optical adjustment layer 72 interposed therebetween. A resonance structure that causes resonance of 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 layers 72 provided corresponding to the sub-pixels 10R, 10G, and 10B are respectively referred to as the optical adjustment layers 72 R , 72 G and 72 B .

[0395] The reflector 71 is formed with a common film thickness in each light emitting element 12. The film thickness of the optical adjustment layer 72 is different in a manner depending on the color to be displayed by the pixel. R , 72 G and 72 B With different film thicknesses, it is thus possible to set the optical distance that results in the optimum resonance at the wavelength of light corresponding to the color to be displayed.

[0396] exist Fig. 22 In the example shown in A, the light emitting element 12 R , 12 G and 12 B As described above, since the film thickness of the optical adjustment layer 72 is different depending on the color to be displayed by the pixel, the position of the upper surface of the second electrode 123 is different depending on the light emitting element 12. R , 12 G and 12 B The types of methods are different.

[0397] The reflector 71 may be formed of, for example, a metal such as aluminum (Al), silver (Ag), or copper (Cu) or an alloy mainly containing these metals.

[0398] The optical adjustment layer 72 may include silicon nitride (SiN x ), silicon oxide (SiO x ) or silicon oxynitride (SiO x N y ) or an organic resin material such as an acrylic resin or a polyimide resin. The optical adjustment layer 72 may be a single layer, or may be a multilayer film of the above-mentioned plurality of materials. In addition, the number of layers may vary depending on the type of the light emitting element 12.

[0399] The first electrode 121 may be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).

[0400] The second electrode 123 is required to function as a semi-transmissive reflective film and can be formed of magnesium (Mg) or silver (Ag), a magnesium-silver alloy (MgAg) mainly containing these metals, or an alloy containing an alkali metal or an alkaline earth metal.

[0401] (Resonator Structure: Second Example)

[0402] Fig. 22 B is a schematic cross-sectional view for describing a second example of the resonator structure.

[0403] In the second example, the first electrode 121 and the second electrode 123 are formed with a common film thickness in each light emitting element 12 .

[0404] Then, also in the second example, the reflector 71 is arranged below the first electrode 121 of the light emitting element 12, with the optical adjustment layer 72 interposed therebetween. A resonance structure that causes resonance of light generated by the OLED layer 122 is formed between the reflector 71 and the second electrode 123. Similar to the first example, the reflector 71 is formed with a common film thickness in each light emitting element 12, and the film thickness of the optical adjustment layer 72 is different in a manner depending on the color to be displayed by the pixel.

[0405] exist Fig. 22 In the first example shown in A, the light emitting element 12 R , 12 G and 12 B The upper surfaces of the reflectors 71 are flush with each other, and the position of the upper surface of the second electrode 123 depends on the position of the light emitting element 12 R , 12 G and 12 B The types of methods are different.

[0406] On the other hand, Fig. 22 In the second example shown in FIG. 1B , the upper surface of the second electrode 123 extends across the light emitting element 12 R , 12 G and 12 B In order to make the upper surfaces of the second electrodes 123 flush with each other, R , 12 G and 12 B The position of the upper surface of the reflector 71 depends on the light emitting element 12. R , 12 G and 12 B Therefore, the lower surface of the reflector 71 (in other words, the upper surface of the base layer (insulating layer) 73) has a step shape depending on the type of the light emitting element 12.

[0407] Materials constituting the reflector 71 , the optical adjustment layer 72 , the first electrode 121 , and the second electrode 123 and the like are similar to those described in the first example, and thus description thereof will be omitted.

[0408] (Resonator Structure: Third Example)

[0409] Fig.23 A is a schematic cross-sectional view for describing a third example of a resonator structure. In the following description, the reflectors 71 provided corresponding to the sub-pixels 10R, 10G, and 10B may be referred to as reflectors 71, respectively. R , 71 G and 71 B .

[0410] In the third example, the first electrode 121 and the second electrode 123 are formed with a common film thickness in each light emitting element 12 .

[0411] Then, also in the third example, the reflector 71 is arranged below the first electrode 121 of the light emitting element 12, with the optical adjustment layer 72 interposed therebetween. A resonance structure that causes resonance of 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 the optical adjustment layer 72 differs in a manner depending on the color to be displayed by the pixel. Then, similar to the second example, the upper surface of the second electrode 123 crosses the light emitting element 12 R , 12 G and 12 B flush with each other.

[0412] exist Fig. 22 In the second example shown in FIG. 1B , in order to make the upper surfaces of the second electrodes 123 flush with each other, the lower surface of the reflector 71 has a stepped shape according to the type of the light emitting element 12 .

[0413] On the other hand, Fig.23 In the third example shown in A, the film thickness of the reflector 71 is set to be determined according to the light emitting element 12. R , 12 G and 12 B More specifically, the film thickness is set so that the reflector 71 R , 71 G and 71 B The lower surfaces are flush with each other.

[0414] Materials constituting the reflector 71 , the optical adjustment layer 72 , the first electrode 121 , and the second electrode 123 and the like are similar to those described in the first example, and thus description thereof will be omitted.

[0415] (Resonator Structure: Fourth Example)

[0416] Fig.23 B is a schematic cross-sectional view for describing a fourth example of a resonator structure. In the following description, the first electrodes 121 provided corresponding to the sub-pixels 10R, 10G, and 10B may be referred to as first electrodes 121, respectively. R ,121 G and 121 B .

[0417] exist Fig. 22 In the first example shown in FIG. 1A , the first electrode 121 and the second electrode 123 of each light emitting element 12 are formed to have a common film thickness. Then, the reflector 71 is arranged below the first electrode 121 of the light emitting element 12 with the optical adjustment layer 72 interposed therebetween.

[0418] On the other hand, Fig.23 In the fourth example shown in FIG. 1B , the optical adjustment layer 72 is omitted, and the film thickness of the first electrode 121 is determined by the light emitting element 12 R , 12 G and 12 B The types are set differently.

[0419] The reflector 71 is formed with a common film thickness in each light emitting element 12. The film thickness of the first electrode 121 is different depending on the color to be displayed by the pixel. R ,121 G ,121 B The film thickness is different, so the optical distance that best resonates with the wavelength of light corresponding to the displayed color can be set.

[0420] Materials constituting the reflector 71 , the optical adjustment layer 72 , the first electrode 121 , and the second electrode 123 and the like are similar to those described in the first example, and thus description thereof will be omitted.

[0421] (Resonator Structure: Fifth Example)

[0422] Fig.24 A is a schematic cross-sectional view for describing a fifth example of the resonator structure.

[0423] exist Fig. 22 In the first example shown in A of FIG. 1 , the first electrode 121 and the second electrode 123 are formed with a common film thickness in each light emitting element 12. Then, the reflector 71 is arranged below the first electrode 121 of the light emitting element 12 with the optical adjustment layer 72 interposed therebetween.

[0424] On the other hand, Fig.24In the fifth example shown in FIG. 1A , the optical adjustment layer 72 is omitted, and an oxide film 74 is formed on the surface of the reflector 71 instead. The film thickness of the oxide film 74 varies depending on the light emitting element 12. R , 12 G , 12 B In the following description, the oxide films 74 provided corresponding to the sub-pixels 10R, 10G, and 10B may be referred to as oxide films 74, respectively. R , 74 G and 74 B .

[0425] The thickness of the oxide film 74 varies depending on the color displayed by the pixel. R , 74 G , 74 B Since the film thickness is different, the optical distance that produces the best resonance with the wavelength of light corresponding to the displayed color can be set.

[0426] Oxide film 74 is a film obtained by oxidizing the surface of reflector 71 and includes, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. Oxide film 74 serves as an insulating film to adjust the optical path length (optical distance) between reflector 71 and second electrode 123 .

[0427] The film thickness depends on the light emitting element 12 R , 12 G and 12 B The oxide film 74 may be formed in a different manner according to the type, for example, as follows.

[0428] First, a container is filled with an electrolyte, and the substrate formed with the reflector 71 is immersed in the electrolyte. In addition, an electrode is arranged to face the reflector 71.

[0429] 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 generated by anodization is proportional to the voltage value with respect to the electrode. Therefore, when a voltage according to the type of the light emitting element 12 is applied to the reflector 71, R , 71 G and 71 B Thus, oxide films 74 with different film thicknesses can be formed simultaneously.

[0430] Materials and the like constituting the reflector 71 , the first electrode 121 , and the second electrode 123 are similar to those described in the first embodiment, and thus description thereof will be omitted.

[0431] (Resonator Structure: Sixth Example)

[0432] Fig.24B is a schematic cross-sectional view for describing a sixth example of the resonator structure.

[0433] In the sixth example, the light emitting element 12 includes a stack of a first electrode 121, an OLED layer 122, and a second electrode 123. Note that in the sixth example, the first electrode 121 is formed to function as both an electrode and a reflector. The first electrode (also used as a reflector) 121 includes a first electrode 121 having a first electrode 122, an OLED layer 122, and a second electrode 123. R , 12 G and 12 B The type of material with the optical constant is selected. Since the phase shift of the first electrode (also used as a reflector) 121 is changed, an optical distance can be set that causes optimal resonance at the wavelength of light corresponding to the color to be displayed.

[0434] The first electrode (also used as a reflector) 121 may include an elemental metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy mainly containing these metals. R The first electrode (also used as a reflector) 121 R The light emitting element 12 may include copper (Cu). G The first electrode (also used as a reflector) 121 G and light emitting element 12 B The first electrode (also used as a reflector) 121 B May include aluminum.

[0435] Materials and the like constituting the second electrode 123 are similar to those described in the first example, and thus description thereof will be omitted.

[0436] (Resonator Structure: Seventh Example)

[0437] Fig.25 is a schematic cross-sectional view for describing a seventh example of the resonator structure.

[0438] The seventh example basically has a configuration in which the sixth example is applied to light emitting elements 12R and 12G, and the first example is applied to light emitting element 12 B. With this configuration as well, an optical distance that causes optimal resonance at a wavelength corresponding to light of a color to be displayed can be set.

[0439] For light emitting element 12 R and 12 G The first electrode 121 R and 121 G (also used as a reflector) may include an elemental metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy mainly containing these metals.

[0440] Composition for light emitting element 12 BReflector 71 B , optical adjustment layer 72 B and the first electrode 121 B The materials and the like are similar to those described in the first example, so a description thereof will be omitted.

[0441] <11. Application Examples

[0442] (Electronic equipment)

[0443] The display devices 101, 102, 103, 104, and 105 (hereinafter, referred to as "display device 101, etc.") according to the first to fifth embodiments and their modified examples can be provided in various types of electronic devices. The display device 101, etc. is particularly suitable for goggle devices that require high resolution and are used near the eyes in an enlarged manner, such as head-mounted displays, electronic viewfinders of cameras or single-lens reflex cameras, etc.

[0444] (Specific example 1)

[0445] Fig.26 A and Fig.26 B shows an example of the appearance of a digital camera 310. The digital camera 310 is a single-lens reflex type with interchangeable lenses, and includes an interchangeable imaging lens unit (interchangeable lens) 312 located approximately at the center of the front surface of a camera body (camera body) 311 and a grip portion 313 to be held by a photographer on the front left side.

[0446] The monitor 314 is provided at a position offset to the left from the center of the back side of the camera body 311. An electronic viewfinder (eyepiece window) 315 is provided above the monitor 314. By looking through the electronic viewfinder 315, the photographer can visually recognize the optical image of the subject guided from the imaging lens unit 312 and determine the picture composition. The electronic viewfinder 315 includes any one of the above-mentioned display device 101 and the like.

[0447] (Specific Example 2)

[0448] Fig. 27 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 a display unit 321 having an eyeglass shape, and a user wears the head-mounted display 320 on the head. The display unit 321 includes any one of the above-mentioned display device 101 and the like.

[0449] (Specific example 3)

[0450] Fig.28An example of the 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 glass 333, and the video display screen unit 331 includes any of the above-described display devices 101 and the like.

[0451] (Specific example 4)

[0452] Fig.29 An example of the 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 341 , an arm 342 , and a lens barrel 343 .

[0453] The body 341 is connected to the arm 342 and the glasses 350. Specifically, the end of the body 341 in the long side direction is connected to the arm 342, and one of the side surfaces of the body 341 is connected to the glasses 350 via a connecting member. Note that the body 341 may be directly mounted on the head of a human body.

[0454] The main body 341 includes a control panel and a display unit for controlling the operation of the see-through head mounted display 340. The arm 342 connects the main body 341 and the lens barrel 343 and supports the lens barrel 343. Specifically, the arm 342 is coupled to both the end of the main body 341 and the end of the lens barrel 343 to hold the lens barrel 343. In addition, the arm 342 includes a signal line for communicating data related to an image to be provided from the main body 341 to the lens barrel 343.

[0455] The lens barrel 343 projects image light supplied from the main body 341 through the lens 351 toward the eyes of the user wearing the see-through head-mounted display 340 through the arm 342. In this see-through head-mounted display 340, the display unit of the main body 341 includes any of the above-described display devices 101 and the like.

[0456] (Specific Example 5)

[0457] Fig.30 An example of the appearance of a smartphone 360 ​​is shown. The smartphone 360 ​​includes a display unit 361 that displays various types of information, an operation unit 362 including buttons for receiving operation input from a user, etc. The display unit 361 includes any of the above-described display devices 101 and the like.

[0458] (Specific Example 6)

[0459] The above-described display device 101 and the like may be provided in various displays provided in a vehicle.

[0460] Fig.31 A and Fig.31B is a diagram showing an example of the internal structure of a vehicle 500 equipped with various displays. Specifically, Fig.31 A is a diagram showing an example of the internal state of the vehicle 500 as viewed from the rear to the front of the vehicle 500. Fig.31 B is a diagram showing an example of the internal state of the vehicle 500 as viewed from the oblique rear to the oblique front of the vehicle 500.

[0461] The vehicle 500 includes a central display 501, a console display 502, a head-up display 503, a digital rearview mirror 504, a steering wheel display 505, and a rear entertainment display 506. At least one of these displays includes any one of the above-mentioned display devices 101, etc. For example, all of these displays may include any one of the above-mentioned display devices 101, etc.

[0462] The central display 501 is arranged on the instrument panel to face the driver seat 508 and the passenger seat 509 . Fig.31 A and Fig.31 B illustrates an example of a central display 501 having a horizontally elongated shape extending across a driver's seat 508 and a passenger seat 509, but the screen size and position of the central display 501 are appropriately determined. The central display 501 is capable of displaying information sensed by various sensors. As a specific example, the central display 501 may display an image captured by an image sensor, a distance image showing the distance to an obstacle in front of or to the side of the vehicle 500 (the distance is measured by a time-of-flight (ToF) sensor), a passenger's body temperature detected by an infrared sensor, and the like. The central display 501 may be used to display, for example, at least one of safety-related information, operation-related information, a life-saving log, health-related information, authentication / identification-related information, or entertainment-related information.

[0463] Safety related information is information such as drowsiness sensing, averted eyes sensing, sensing of mischief of children riding together, and the presence or absence of wearing of seat belts, sensing of the departure of passengers, and is information sensed by a sensor arranged to overlap, for example, the rear surface side of the central display 501. Operation related information indicates gestures related to operations performed by occupants sensed using sensors. The gestures to be sensed may include operations of various types of equipment in the vehicle 500. For example, sensing operations of air conditioning equipment, navigation devices, audio-visual (AV) devices, lighting devices, etc. The life log includes life logs of all occupants. For example, the life log includes a record of actions of each occupant in the vehicle. By acquiring and storing the life log, the state of each passenger at the time of the accident can be checked. Health related information indicates the body temperature of the occupant sensed by a sensor such as a temperature sensor, and the health status of the occupant is estimated based on the sensed body temperature. Alternatively, the face of the occupant can be imaged by using an image sensor, and the health status of the occupant can be estimated based on the imaged facial expression. In addition, an automatic voice conversation can be conducted with the occupant, and the occupant's health condition can be estimated based on the content of the response from the occupant. The authentication / recognition related information contains information about a keyless entry function using facial authentication with a sensor and an automatic seat height and position adjustment function through facial recognition. The entertainment related information includes information about a function of detecting operation information about an AV device used by the occupant through a sensor and a function of recognizing the occupant's face through a sensor and providing content suitable for the occupant through the AV device.

[0464] The console display 502 may be used, for example, to display life log information. The console display 502 is arranged near a shift lever 511 of a center console 510 between a driver's seat 508 and a passenger seat 509. The console display 502 may also display information sensed by various sensors. In addition, the console display 502 may display an image of the vehicle's surroundings captured with an image sensor, or may display a distance image showing the distance to obstacles present in the vehicle's surroundings.

[0465] The head-up display 503 is virtually displayed behind the windshield 512 in front of the driver's seat 508. For example, the head-up display 503 can be used to display at least one of safety-related information, operation-related information, a life-saving log, health-related information, authentication / identification-related information, or entertainment-related information. Since the head-up display 503 is virtually arranged in front of the driver's seat 508 in many cases, the head-up display 503 is suitable for displaying information directly related to the operation of the vehicle 500, such as the speed of the vehicle 500 and the remaining fuel (battery) level.

[0466] The digital rearview mirror 504 can display not only the rear of the vehicle 500 but also the status of the occupants in the rear seats, so that through the sensor arranged on the rear surface side of the digital rearview mirror 504, the digital rearview mirror 504 can be used to display, for example, life log information.

[0467] 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, life-saving log, health-related information, authentication / identification-related information, or entertainment-related information. Specifically, since the steering wheel display 505 is located near the driver's hand, the steering wheel display 505 is suitable for displaying life-log information such as the driver's body temperature, or is suitable for displaying information about the operation of an AV device, an air conditioning device, etc.

[0468] The rear entertainment display 506 is installed on the back side of the driver's seat 508 or the co-driver's seat 509 for the rear seat passengers to enjoy audio and video. The rear entertainment display 506 can be used to display, for example, at least one of safety-related information, operation-related information, life-saving log, health-related information, authentication / identification-related information, or entertainment-related information. In particular, when the rear entertainment display 506 is located in front of the passengers in the rear seats, information related to the passengers in the rear seats is displayed. For example, information about the operation of an AV device or an air-conditioning device can be displayed, or the measurement result of the body temperature of a passenger in the rear seat with a temperature sensor can be displayed on the display.

[0469] The sensor can be arranged on the rear surface side of the display device 101, etc., so that the distance to the object present in the surrounding environment can be measured. Optical distance measurement methods are roughly divided into passive and active types. By the passive method, distance measurement is performed by receiving light from the object without projecting light from the sensor to the object. Examples of passive methods include lens focusing methods, stereo methods, monocular vision methods, etc. By the active method, distance measurement is performed by projecting light onto the object and receiving reflected light from the object with a sensor to measure the distance. Examples of active methods include optical radar methods, active stereo methods, illumination difference stereo methods, moiré morphology methods, interference methods, etc. The above-mentioned display device 101, etc. can be used in distance measurement by any of these methods. The above-mentioned passive or active distance measurement can be performed by using a sensor arranged on the rear surface side of the display device 101, etc.

[0470] Reference Symbols List

[0471] 10R, 10G, 10B sub-pixels

[0472] 11. Driving substrate

[0473] 111 Substrate

[0474] 112 Insulation layer

[0475] 113,115 Wiring

[0476] 114,116 Contact

[0477] 12W, 12R, 12G, 12B light emitting element

[0478] 121 Anode

[0479] 122OLED layer

[0480] 123,126 cathode

[0481] 124 common electrode

[0482] 125 Contact

[0483] 13 Insulation layer

[0484] 14 Protective layer

[0485] 15 Color Filters

[0486] 15FR red filter part

[0487] 15FG Green filter section

[0488] 15FB blue filter part

[0489] 16 Filling resin layer

[0490] 17 Sealing part

[0491] 18 Cover glass

[0492] 19 Contact electrode

[0493] 191 Protrusion

[0494] 192 Protrusion Group

[0495] 192a First protrusion

[0496] 192b Second protrusion

[0497] 193 Protrusion Group

[0498] 193a Protrusion

[0499] 21 First protective layer

[0500] 22 Second protective layer

[0501] 23 Planarization layer

[0502] 24 Lens Array

[0503] 241 Lens

[0504] 101,102,103,104,105,601 Display device

[0505] 310 Digital Camera

[0506] 320 Head-mounted display

[0507] 330 TV sets

[0508] 340 See-through Head-Mounted Display

[0509] 360 Smartphone

[0510] 500 vehicles

[0511] RE1 Effective pixel area

[0512] RE2 surrounding area.

Claims

1. A light emitting device, comprising: a plurality of light emitting elements in the light emitting area; A contact electrode is disposed in a peripheral area around the light emitting area; as well as A first electrode extends from the light emitting region to the peripheral region and is connected to the contact electrode, wherein: The contact electrode includes a plurality of first structures at a portion connected to the first electrode, and The plurality of first structures extend in a direction away from the light emitting area.

2. The light emitting device according to claim 1, wherein: The plurality of first structures include at least one of a plurality of first recesses and a plurality of first protrusions.

3. The light emitting device according to claim 1, wherein: The contact electrode has a ring shape surrounding the light emitting area.

4. The light emitting device according to claim 1, wherein: The direction away from the light emitting area includes a direction perpendicular to the periphery of the light emitting area or a direction inclined relative to the periphery of the light emitting area.

5. The light emitting device according to claim 1, wherein: The plurality of first structures are arranged in a circumferential direction of the periphery of the light emitting region, and a distance between the first structures adjacent to each other on an inner periphery side of the peripheral region is greater than a distance between the first structures adjacent to each other on an outer periphery side of the peripheral region.

6. The light emitting device according to claim 1, wherein: The contact electrode further includes a plurality of second structures at a portion where the first electrode is connected, The plurality of second structures extend in a direction substantially perpendicular to the extending direction of the first structures, and The plurality of first structures are disposed closer to the light emitting region than the plurality of second structures.

7. The light emitting device according to claim 1, wherein: The light emitting area includes an effective pixel area, and The first electrode includes a cathode.

8. The light emitting device according to claim 1, further comprising: a plurality of second electrodes disposed in the light emitting region; as well as The organic light-emitting layer is disposed between the plurality of second electrodes and the first electrode.

9. The light emitting device according to claim 1, further comprising: a plurality of third electrodes disposed in the light emitting region; a plurality of fourth electrodes disposed in the light emitting region; as well as A plurality of organic light-emitting layers are arranged in the light-emitting region, wherein: Each of the organic light-emitting layers is disposed between a corresponding one of the third electrodes and a corresponding one of the fourth electrodes, and The first electrode is connected to the plurality of fourth electrodes.

10. A light emitting device, comprising: a plurality of light emitting elements in the light emitting area; A contact electrode is disposed in a peripheral area around the light emitting area; as well as A first electrode extends from the light emitting region to the peripheral region and is connected to the contact electrode, wherein: The contact electrode includes a plurality of structure groups at a portion connected to the first electrode, The plurality of structure groups are arranged at least in a circumferential direction of the periphery of the light emitting area, Each structure group includes multiple structures, and Structural groups adjacent to each other in the circumferential direction are separated from each other.

11. The light emitting device according to claim 10, wherein: The plurality of structures includes at least one of a plurality of recesses and a plurality of protrusions.

12. The light emitting device according to claim 10, wherein: The distance between the structure groups adjacent to each other in the circumferential direction is greater than the distance between the structures adjacent to each other.

13. The light emitting device according to claim 10, wherein: The plurality of structures are arranged two-dimensionally in the circumferential direction and in a direction substantially perpendicular to the circumferential direction, and The distance between the structure groups adjacent to each other in the circumferential direction is greater than the distance between the structures adjacent to each other in the circumferential direction.

14. The light emitting device according to claim 10, wherein: The plurality of structure groups are arranged two-dimensionally in the circumferential direction and in a direction substantially perpendicular to the circumferential direction, and Structural groups adjacent to each other in a direction substantially perpendicular to the circumferential direction are separated from each other.

15. The light emitting device according to claim 14, wherein: The plurality of structures are arranged two-dimensionally in the circumferential direction and in a direction substantially perpendicular to the circumferential direction. The distance between the groups of structures adjacent to each other in the circumferential direction is greater than the distance between the structures adjacent to each other in the circumferential direction, and A distance between the groups of structures adjacent to each other in a direction substantially perpendicular to the circumferential direction is greater than a distance between the structures adjacent to each other in a direction substantially perpendicular to the circumferential direction.

16. The light emitting device according to claim 11, wherein: The plurality of structures are arranged two-dimensionally; The plurality of recesses become shallower from the outer periphery to the inner periphery of the peripheral region, and The plurality of protrusions become lower from the outer periphery to the inner periphery of the peripheral region.

17. The light emitting device according to claim 10, wherein: The plurality of structures are arranged two-dimensionally; The plurality of structures have at least one step, and The number of steps of the plurality of structures increases from the outer circumference to the inner circumference of the peripheral area.

18. The light emitting device according to claim 10, wherein: The plurality of structures are arranged two-dimensionally; and The inclination angles of the side surfaces of the plurality of structures decrease from the outer circumference to the inner circumference of the peripheral area.

19. The light emitting device according to claim 10, wherein: The plurality of structures have a dot shape in a plan view.

20. An electronic device comprising the light emitting device according to claim 1.

Images