WO2024053611A1

WO2024053611A1 - Light-emitting device and electronic equipment

Info

Publication number: WO2024053611A1
Application number: PCT/JP2023/032254
Authority: WO
Inventors: 究三浦; 尚司豊田
Original assignee: ソニーセミコンダクタソリューションズ株式会社
Priority date: 2022-09-08
Filing date: 2023-09-04
Publication date: 2024-03-14

Abstract

Provided is a light-emitting device with which it is possible to ensure a carrier path in a direction away from a light-emitting region while increasing the contact area between a first electrode and a contact electrode.　This light-emitting device includes a plurality of light-emitting elements in a light-emitting region, the light-emitting device comprising a contact electrode that is provided to a peripheral region positioned at the periphery of the light-emitting region, and a first electrode that is extended from the light-emitting region to the peripheral region and is connected to the contact electrode. The contact electrode has a plurality of first structures in a section where the first electrode is connected, the plurality of first structures being extended in a direction away from the light-emitting region.

Description

Light emitting devices and electronic equipment

The present disclosure relates to a light emitting device and an electronic device including the same.

Light-emitting devices including a plurality of light-emitting elements in a light-emitting region are widely used. As one type of light-emitting device, a contact electrode is provided in a peripheral region located around a light-emitting region, and a common electrode (for example, a common cathode) common to a plurality of light-emitting elements is provided extending from the light-emitting region to the peripheral region. A light emitting device connected to a contact electrode is known. In a light emitting device having such a configuration, a technique has been proposed in which a concave portion or a convex portion is provided in the contact electrode in order to increase the contact area between the common electrode and the contact electrode (see, for example, Patent Document 1).

International Publication No. 2019/142582 pamphlet

However, as described above, when a concave or convex portion is provided on a contact electrode, the common electrode may be cut due to the step of the concave or convex portion, or the thickness of the common electrode may be reduced due to the step of the concave or convex portion. be. When the common electrode is in such a state due to a step difference, it may become difficult to secure a carrier path in the direction away from the light emitting region.

An object of the present disclosure is to provide a light emitting device that can secure a carrier path in a direction away from a light emitting region while increasing the contact area between a first electrode and a contact electrode, and an electronic device equipped with the same.

In order to solve the above problems, a first light emitting device according to the present disclosure includes:
A light emitting device including a plurality of light emitting elements in a light emitting region,
a contact electrode provided in a peripheral region located around the light emitting region;
a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode;
The contact electrode has a plurality of first structures in a portion connected to the first electrode,
The plurality of first structures extend in a direction away from the light emitting region.

The second light emitting device according to the present disclosure includes:
A light emitting device including a plurality of light emitting elements in a light emitting region,
a contact electrode provided in a peripheral region located around the light emitting region;
a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode;
The contact electrode has a plurality of structure groups in a portion connected to the first electrode,
The plurality of structure groups are arranged at least in the circumferential direction of the outer periphery of the light emitting region,
Each structure group includes multiple structures,
Structure groups adjacent in the circumferential direction are separated from each other.

An electronic device according to the present disclosure includes the first light emitting device or the second light emitting device.

FIG. 1 is a plan view of a display device for explaining the outline. FIG. 2 is a plan view of the display device according to the first embodiment. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is an enlarged plan view of a part of the surrounding area. FIG. 5 is a plan view of a display device according to the second embodiment. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a plan view of a display device according to a third embodiment. FIG. 8 is an enlarged plan view of a part of the surrounding area. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 7. FIG. 10 is a cross-sectional view of a display device according to a fourth embodiment. FIG. 11 is a cross-sectional view of a display device according to the fifth embodiment. FIG. 12 is a plan view of a display device according to Modification 1. FIG. 13 is a cross-sectional view of a display device according to modification example 2. FIG. 14 is a plan view of a display device according to modification example 3. FIG. 15 is a cross-sectional view of a display device according to modification example 4. FIG. 16 is a cross-sectional view of a display device according to modification example 5. FIG. 17 is a cross-sectional view of a display device according to modification 6. 18A, 18B, and 18C respectively explain the relationship between the normal line LN passing through the center of the light emitting section, 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 section. This is a conceptual diagram for FIG. 19 is a conceptual diagram for explaining the relationship between a normal line LN passing through the center of the light emitting section, a normal line LN' passing through the center of the lens member, and a normal line LN'' passing through the center of the wavelength selection section. . 20A and 20B are diagrams for explaining the relationships between the normal line LN passing through the center of the light emitting section, 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 section, respectively. It is a conceptual diagram. FIG. 21 is a conceptual diagram for explaining the relationship between a normal line LN passing through the center of the light emitting section, a normal line LN' passing through the center of the lens member, and a normal line LN'' passing through the center of the wavelength selection section. . FIG. 22A is a schematic cross-sectional view for explaining a first example of the resonator structure. FIG. 22B is a schematic cross-sectional view for explaining a second example of the resonator structure. FIG. 23A is a schematic cross-sectional view for explaining a third example of the resonator structure. FIG. 23B is a schematic cross-sectional view for explaining a fourth example of the resonator structure. FIG. 24A is a schematic cross-sectional view for explaining a fifth example of the resonator structure. FIG. 24B is a schematic cross-sectional view for explaining a sixth example of the resonator structure. FIG. 25 is a schematic cross-sectional view for explaining the seventh example of the resonator structure. FIG. 26A is a front view of the digital still camera. FIG. 26B is a rear view of the digital still camera. FIG. 27 is a perspective view of the head mounted display. FIG. 28 is a perspective view of the television device. FIG. 29 is a perspective view of a see-through head mounted display. FIG. 30 is a perspective view of the smartphone. FIG. 31A is a diagram showing the inside of the vehicle from the rear to the front of the vehicle. FIG. 31B is a diagram showing the inside of the vehicle from diagonally rearward to diagonally forwardly.

Embodiments of the present disclosure will be described in the following order with reference to the drawings. In addition, in all the figures of the following embodiment, the same code|symbol is attached to the same or corresponding part.
1 General description of the light emitting device according to the present disclosure 2 Overview 3 First embodiment (example of display device)
4 Second embodiment (example of display device)
5 Third embodiment (example of display device)
6 Fourth embodiment (example of display device)
7 Fifth embodiment (example of display device)
8 Modifications 9 Relationship between normal lines passing through the centers of the light emitting section, lens member, and wavelength selection section 10 Example of resonator structure 11 Application example (example of electronic equipment)

<1 General description of the light emitting device according to the present disclosure>
The light emitting device according to the present disclosure may be a display device, a lighting device, or a device other than these. The display device may be an OLED (Organic Light Emitting Diode) display device.

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

In the light emitting device according to the present disclosure, when the first electrode is an anode and the second electrode is a cathode, the plurality of light emitting elements include the plurality of anodes provided in the light emitting region and the plurality of anodes extending from the light emitting region to the peripheral region. The organic light-emitting layer may include one cathode connected to a contact electrode, and an organic light-emitting layer provided between the plurality of anodes and one cathode.

In the light emitting device according to the present disclosure, when the first electrode is a cathode and the second electrode is an anode, the plurality of light emitting elements include a plurality of cathodes provided in the light emitting region and a plurality of cathodes extending from the light emitting region to the peripheral region. The organic light emitting layer may include one anode connected to a contact electrode, and an organic light emitting layer provided between the plurality of cathodes and the one anode.

In the light-emitting device according to the present disclosure, when the first electrode is a common electrode connected to the anode or cathode of each of the plurality of light-emitting elements, the plurality of light-emitting elements include a plurality of types of light-emitting elements, and the plurality of light-emitting elements include a plurality of types of light-emitting elements. Each light emitting element may be capable of emitting light of a different color. For example, the plurality of types of light emitting elements include a first light emitting element that can emit red light, a second light emitting element that can emit green light, and a third light emitting element that can emit blue light. May include.

The plurality of types of light emitting elements include an anode, a cathode, and an organic light emitting layer, and the organic light emitting layer may be provided between the anode and the cathode. The anode, cathode, and organic light emitting layer in the plurality of types of light emitting elements are individually provided for each light emitting element. For example, the first light emitting device 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. The second light emitting device may include an anode, a cathode, and a second organic light emitting layer, and the second organic light emitting layer may emit green light. The third light emitting device 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.

<2 Overview>
In the display device 601 shown in FIG. 1, the cathode 623 extends from the effective pixel region RE3 to the peripheral region RE4, and is connected to a contact electrode (not shown). The contact electrode is connected to the wiring 615 through a plurality of contact parts (not shown). The contact electrode has a plurality of protrusions 691 at the portion where the cathode 623 is connected to increase the contact area between the peripheral edge of the cathode 623 and the contact electrode. The plurality of convex portions 691 extend along the circumferential direction of the outer periphery of the effective pixel region RE3, and form a plurality of examples that are lined up in the direction away from the effective pixel region RE3.

In the display device 601 having the above configuration, the peripheral edge of the cathode 623 may be cut due to the step of the convex portion 691, or the peripheral edge of the cathode 623 may become thin due to the step of the convex portion 691. When the peripheral edge of the cathode 623 is in such a state, the resistance value of the cathode 623 in the direction away from the effective pixel area RE3 increases. Therefore, it becomes difficult to secure a current path in the direction away from the effective pixel area RE3. In FIG. 1, an arrow 31 represents an image of a current path that is not obstructed by the convex portion 691, and an arrow 32 represents an image of a current path that is obstructed by the convex portion 691. Note that in the following description,

arrows

31 and 32 each represent an image of a current path.

In view of the above points, the present inventors have conducted extensive studies to increase the contact area between the peripheral edge of the cathode 623 and the contact electrode while ensuring a current path (carrier path) in the direction away from the effective pixel area RE3. went. As a result, a configuration was found in which the contact electrode is provided with a plurality of convex portions extending in a direction away from the effective pixel region RE3.

<3 First embodiment>
[Configuration of display device 101]
FIG. 2 is a plan view of the display device 101 according to the first embodiment. FIG. 3 is a sectional view taken along line III-III in FIG. 2. The display device 101 has an effective pixel region RE1 and a peripheral region RE2 located around the effective pixel region RE1. The effective pixel area RE1 is an example of a light emitting area in the claims.

A plurality of sub-pixels 10R, 10G, and 10B are two-dimensionally arranged in a prescribed arrangement pattern within the effective pixel region RE1. The prescribed arrangement pattern may be, for example, a stripe arrangement, a delta arrangement, a square arrangement, a mosaic arrangement, or an arrangement other than these. A pad section, a video display driver, etc. (not shown) may be provided in the peripheral region RE2. A flexible printed circuit (FPC) (not shown) may be connected to the pad portion.

The subpixel 10R can emit red light (first light). The subpixel 10G can emit green light (second light). The subpixel 10B can emit blue light (third light). In the following description, the sub-pixels 10R, 10G, and 10B may be referred to collectively as the sub-pixel 10 without any particular distinction. One pixel (one pixel) is composed of, for example, a plurality of adjacent sub-pixels 10R, 10G, 10B, or a plurality of adjacent sub-pixels 10R, 10G, 10B, 10B.

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. Display device 101 may be a microdisplay. The display device 101 may be included in an eyewear device such as a VR (Virtual Reality) device, an MR (Mixed Reality) device, an AR (Augmented Reality) device, or an electronic view finder (EVF) or a small device. It may be provided in a projector or the like.

As shown in FIG. 3, the display device 101 includes a driving substrate 11, a plurality of light emitting elements 12W, an insulating layer 13, a protective layer 14, a color filter 15, a filled resin layer 16, and a sealing part 17. , a cover glass 18 and a contact electrode 19.

In this specification, of both surfaces of each layer constituting the display device 101, the surface that is the top side (display surface side) of the display device 101 is referred to as the first surface, and the bottom side (opposite to the display surface) of the display device 101 is referred to as the first surface. The side) is sometimes referred to as the second side. In this specification, the periphery of the first surface refers to an area having a predetermined width from the periphery of the first surface inward, and the periphery of the second surface refers to an area inward from the periphery of the second surface. A region having a predetermined width towards the end.

(Drive board 11)
The drive board 11 is a so-called backplane and can drive a plurality of light emitting elements 12W. The drive substrate 11 includes, for example, a substrate 111 and an insulating layer 112 in this order.

A plurality of drive circuits (not shown) and a plurality of

wirings

113, 115, etc. may be provided on the first surface of the substrate 111. The substrate 111 may be, for example, a semiconductor substrate on which a transistor or the like can be easily formed, or may be a glass substrate or a resin substrate with low moisture and oxygen permeability. The semiconductor substrate includes, for example, amorphous silicon, polycrystalline silicon, single crystal silicon, or the like. The glass substrate includes, for example, high strain point glass, soda glass, borosilicate glass, forsterite, lead glass, or quartz glass. The resin substrate includes, for example, at least one selected from the group consisting of polymethyl methacrylate, polyvinyl alcohol, polyvinylphenol, polyether sulfone, polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, and the like.

The insulating layer 112 may be provided on the first surface of the substrate 111 to cover and planarize the plurality of drive circuits, the plurality of

wirings

113, 115, and the like. The insulating layer 112 may insulate between the plurality of drive circuits, the plurality of

wirings

113, 115, etc. provided on the first surface of the substrate 111, and the plurality of light emitting elements 12W. The wiring 115 may be connected to a pad portion (not shown).

The insulating layer 112 may be an organic insulating layer, an inorganic insulating layer, or a laminate of these. The organic insulating layer contains, for example, at least one selected from the group consisting of polyimide resin, acrylic resin, novolak resin, and the like. The inorganic insulating layer includes, for example, at least one selected from the group consisting of silicon oxide (SiO _x ), silicon nitride (SiN _x ), silicon oxynitride (SiO _x N _y ), and the like.

The insulating layer 112 includes a plurality of

contact portions

114 and 116 therein. The contact portion 114 electrically connects the light emitting element 12W and the wiring 113. The contact portion 116 electrically connects the contact electrode 19 and the wiring 115. The

contact portions

114 and 116 include, for example, at least one metal selected from the group consisting of copper (Cu), titanium (Ti), and the like.

(Light emitting element 12W)
The light emitting element 12W can emit white light under the control of a drive circuit or the like. The light emitting element 12W is an OLED element. The OLED element may be a Micro-OLED (M-OLED) element. The light emitting element 12W is included in each

color subpixel

10R, 10G, and 10B.

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

(Anode 121)
The anode 121 is provided on the second surface side of the OLED layer 122. The anode 121 is an individual electrode provided individually for the plurality of light emitting elements 12W within 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 within 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.

The anode 121 may be composed of, for example, a metal layer, or a metal layer and a transparent conductive oxide layer. When the anode 121 is composed of a metal layer and a transparent conductive oxide layer, from the viewpoint of placing a layer having a high work function adjacent to the OLED layer 122, the transparent conductive oxide layer is placed on the OLED layer 122 side. Preferably.

The metal layer also has a function as a reflective layer that reflects the light emitted by the OLED layer 122. Examples of the metal layer include chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), molybdenum (Mo), titanium (Ti), tantalum (Ta), and aluminum (Al). , magnesium (Mg), iron (Fe), tungsten (W), and silver (Ag). The metal layer may contain the at least one metal element described above as a constituent element of an alloy. Specific examples of alloys include aluminum alloys and silver alloys. Specific examples of aluminum alloys include AlNd and AlCu.

A base layer (not shown) may be provided adjacent to the second surface side of the metal layer. The base layer may be capable of improving the crystal orientation of the metal layer during film formation of the metal layer. The base layer contains, for example, at least one metal element selected from the group consisting of titanium (Ti) and tantalum (Ta). The base layer may contain the above-mentioned at least one metal element as a constituent element of the alloy.

The transparent conductive oxide layer contains a transparent conductive oxide. Transparent conductive oxides include, for example, transparent conductive oxides containing indium (hereinafter referred to as "indium-based transparent conductive oxides") and transparent conductive oxides containing tin (hereinafter referred to as "tin-based transparent conductive oxides"). ) and transparent conductive oxides containing zinc (hereinafter referred to as "zinc-based transparent conductive oxides").

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), or 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, so the driving voltage of the display device 101 can be particularly low. The tin-based transparent conductive oxide includes, 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).

(OLED layer 122)
OLED layer 122 can emit white light. OLED layer 122 is provided between a plurality of anodes 121 and one cathode 123. The OLED layer 122 is connected between adjacent light emitting elements 12W within the effective pixel region RE1, and is a layer common to the plurality of light emitting elements 12W within the effective pixel region RE1.

The OLED layer 122 may be composed of a laminate including an organic light-emitting layer, and in that case, some layers (for example, an electron injection layer) in the laminate may be inorganic layers. The OLED layer 122 may be an OLED layer including a single layer of light emitting units, an OLED layer including two layers of light emitting units (tandem structure), or an OLED layer with a structure other than these. It's okay. For example, an OLED layer including a single-layer light emitting unit includes 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, and an electron transporting layer from the anode 121 to the cathode 123. The electron injection layer has a structure in which the electron injection layer and the electron injection layer are stacked in this order. For example, an OLED layer including a two-layer light emitting unit includes 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, and a yellow layer from the anode 121 to the cathode 123. It has a structure in which a light emitting layer, an electron transport layer, and an electron injection layer are stacked in this order.

The hole injection layer can increase the efficiency of hole injection into each light emitting layer and can suppress leakage. The hole transport layer can increase hole transport efficiency to each light emitting layer. The electron injection layer can increase the efficiency of electron injection into each light emitting layer. The electron transport layer can increase electron transport efficiency to each light emitting layer. The light emitting separation layer is a layer for adjusting the injection of carriers into each light emitting layer, and the light emission balance of each color is adjusted by injecting electrons and holes into each light emitting layer through the light emitting separation layer. The charge generation layer can supply electrons and holes to two light emitting layers provided to sandwich the charge generation layer, respectively.

By applying an electric field to each of the red light emitting layer, green light emitting layer, blue light emitting layer, and yellow light emitting layer, holes injected from the anode 121 or the charge generation layer and electrons injected from the cathode 123 or the charge generation layer are combined. Recombination occurs and emits red, green, blue, and yellow light.

(Cathode 123)
The cathode 123 is provided on the first surface side of the OLED layer 122. The cathode 123 is connected between adjacent light emitting elements 12W within the effective pixel region RE1, and is a common electrode for the plurality of light emitting elements 12W within the effective pixel region RE1. The cathode 123 extends from the effective pixel region RE1 to the peripheral region RE2. A peripheral portion of the second surface of the cathode 123 is connected to the first surface of the contact electrode 19 .

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 white light emitted from the OLED layer 122. The cathode 123 is preferably a transparent electrode that is transparent to visible light. In this specification, visible light refers to light in a wavelength range of 360 nm or more and 830 nm.

It is preferable for the cathode 123 to be made of a material that has as high a light transmittance as possible and has a small work function in order to increase luminous efficiency. The cathode 123 is composed of, for example, at least one of a metal layer and a transparent conductive oxide layer. More specifically, the cathode 123 is composed of a single layer film of a metal layer or a transparent conductive oxide layer, or a laminated film of a metal layer and a transparent conductive oxide layer. When the cathode 123 is composed of a laminated film, a metal layer may be provided on the OLED layer 122 side, or a transparent conductive oxide layer may be provided on the OLED layer 122 side. From the viewpoint of making the layer adjacent to the OLED layer 122, it is preferable that the metal layer is provided on the OLED layer 122 side.

The metal layer contains, for example, 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 contain the at least one metal element described above as a constituent element of an alloy. Specific examples of the alloy include MgAg alloy, MgAl alloy, and AlLi alloy. The transparent conductive oxide layer includes a transparent conductive oxide. Examples of the transparent conductive oxide include the same materials as the transparent conductive oxide of the anode 121 described above.

(Contact electrode 19)
Contact electrode 19 is provided on the first surface of drive substrate 11 in peripheral region RE2. Contact electrode 19 may have a layered structure. Contact electrode 19 is an auxiliary electrode that connects cathode 123 and wiring 115. The first surface of the contact electrode 19 is electrically connected to the peripheral edge of the second surface of the cathode 123. On the other hand, the second surface of the contact electrode 19 is connected to the wiring 115 via a plurality of contact parts 116 and the like.

The contact electrode 19 may have a closed loop shape that surrounds the entire outer periphery of the effective pixel region RE1 in plan view, or may have a partially divided loop shape that partially surrounds the outer periphery of the effective pixel region RE1. may have. In this specification, a planar view means a planar view when the object is viewed from a direction perpendicular to the first surface.

The contact electrode 19 has a plurality of protrusions 191 on the first surface connected to the peripheral edge of the cathode 123. The convex portion 191 is an example of a structure. The peripheral portion of the cathode 123 may be provided on the first surface of the contact electrode 19 so as to follow the plurality of convex portions 191 . In this specification, the peripheral edge of the cathode 123 refers to a region having a predetermined width from the peripheral edge of the cathode 123 toward the inside. The plurality of convex portions 191 extend in a direction away from the effective pixel region RE1 in plan view. The plurality of convex portions 191 may be provided radially around the effective pixel region RE1.

In this specification, the direction away from the effective pixel area RE1 refers to a direction perpendicular to the outer periphery of the effective pixel area RE1 (see FIG. 2) and a direction oblique to the outer periphery of the effective pixel area RE1 in plan view. (See FIG. 4). A plurality of convex portions 191 extend in a direction perpendicular to the outer circumference of the effective pixel region RE1, and a plurality of convex portions 191 extend in a diagonal direction with respect to the outer circumference of the effective pixel region RE1. The convex portion 191 may also be included. When the plurality of convex portions 191 include a plurality of convex portions 191 extending in a diagonal direction with respect to the outer periphery of the effective pixel region RE1, even if the direction of extension of the plurality of convex portions 191 is the same, Alternatively, the direction may be two or more different directions.

The angle θ (see FIG. 4) formed by the perpendicular line _L1 perpendicular to the outer periphery of the effective pixel region RE1 and the central axis _L2 of the convex portion 191 extending in a direction oblique to the outer periphery of the effective pixel region RE1 is preferably is ±10° or less, more preferably ±8° or less, or ±6° or less, more preferably ±5° or less, ±4° or less, ±3° or less, ±2° or less, ±1° or less, ±0. It is 5° or less or ±0.1° or less. Here, the "+" angle represents an angle in the clockwise direction with respect to the perpendicular line _L1 perpendicular to the outer periphery of the effective pixel area RE1, and the "-" angle represents an angle perpendicular to the outer periphery of the effective pixel area RE1. It represents the angle in the counterclockwise direction with respect to the perpendicular _L1 . The central axis _L2 of the convex portion 191 represents a straight line extending in the direction in which the convex portion 191 extends.

The plurality of convex portions 191 have, for example, an elongated shape in plan view. Specifically, the elongated shape may be, for example, a linear shape, a rectangular shape, an oval shape, or the like, or a shape other than these. The oval shape includes shapes such as an elliptical shape, an elliptical shape, and an egg shape. The plurality of convex portions 191 are arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1, that is, in the circumferential direction of the contact electrode 19. The distance between adjacent protrusions 191 in the circumferential direction of the outer periphery of the effective pixel region RE1 may be constant or may vary.

The contact electrode 19 is composed of, for example, at least one of a metal layer and a metal oxide layer. More specifically, for example, the contact electrode 19 is composed of a single layer film of a metal layer or a metal oxide layer, or a laminated film of a metal layer and a metal oxide layer. It is preferable that the contact electrode 19 has the same configuration as the anode 121 described above. In this case, since the contact electrode 19 can be formed at the same time as the anode 121, the manufacturing process of the display device 101 can be simplified.

As the material included in the contact electrode 19, the same material as the anode 121 described above can be exemplified. Specifically, the materials contained in the metal layer of the contact electrode 19 include the same materials as the metal layer of the anode 121 described above, and the materials contained in the metal oxide layer of the contact electrode 19 include: , the same material as the metal oxide layer of the anode 121 described above can be used.

A base layer (not shown) may be provided adjacent to the second surface side of the metal layer. As the material included in the base layer, the same material as the base layer of the anode 121 described above can be exemplified.

(Insulating layer 13)
The insulating layer 13 is provided in a portion of the first surface of the drive substrate 11 between the spaced apart anodes 121 . Insulating layer 13 provides insulation between adjacent anodes 121 . The insulating layer 13 has a plurality of first openings. Each of the plurality of first openings is provided corresponding to each light emitting element 12W. A plurality of first openings may be provided on the first surface (the surface on the OLED layer 122 side) of each anode 121, respectively. The anode 121 and the OLED layer 122 are in contact with each other through the first opening.

The insulating layer 13 is also provided between the anode 121 and the contact electrode 19 on the first surface of the drive substrate 11 . Insulating layer 13 insulates between anode 121 and contact electrode 19 . Insulating layer 13 has a second opening. The second opening is provided corresponding to the contact electrode 19. The second opening may be provided on the first surface of the contact electrode 19 (the surface connected to the peripheral edge of the cathode 123). The contact electrode 19 and the peripheral edge of the cathode 123 are electrically connected through the second opening. The second opening may have a closed loop shape similar to the contact electrode 19.

The insulating layer 13 may be an organic insulating layer, an inorganic insulating layer, or a laminate of these. The organic insulating layer contains, for example, at least one selected from the group consisting of polyimide resin, acrylic resin, novolak resin, and the like. The inorganic insulating layer includes, for example, at least one selected from the group consisting of silicon oxide (SiO _x ), silicon nitride (SiN _x ), silicon oxynitride (SiO _x N _y ), and the like.

(Protective layer 14)
The protective layer 14 is provided on the first surface of the cathode 123. The protective layer 14 is transparent to white light emitted from the light emitting element 12W. It is preferable that the protective layer 14 has transparency 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 isolate the plurality of light emitting elements 12W from the outside air, and can suppress moisture intrusion into the plurality of light emitting elements 12W from the external environment. Further, when the cathode 123 is formed of a metal layer, the protective layer 14 may have a function of suppressing oxidation of this metal layer.

The protective layer 14 includes, for example, an inorganic material or a polymer resin with low hygroscopicity. The protective layer 14 may have a single layer structure or a multilayer structure. When increasing the thickness of the protective layer 14, it is preferable to have a multilayer structure. This is to relieve internal stress in the protective layer 14. The inorganic material is selected from the group consisting of silicon oxide (SiO _x ), silicon nitride (SiN _x ), silicon oxynitride (SiO _x N _y ), titanium oxide (TiO _x ), aluminum oxide (AlO _x ), etc. Contains at least one species. The polymer resin includes, for example, at least one selected from the group consisting of thermosetting resins, ultraviolet curable resins, and the like. Specifically, the polymer resin includes at least one selected from the group consisting of acrylic resin, polyimide resin, novolak resin, epoxy resin, norbornene resin, parylene resin, and the like.

The protective layer 14 may include an ALD (Atomic Layer Deposition) layer. By including the ALD layer in the protective layer 14, the effect of the protective layer 14 on suppressing moisture infiltration can be further improved. The ALD layer includes, for example, aluminum oxide (AlO _x ) or titanium oxide (TiO _x ).

(Color filter 15)
The color filter 15 is provided above the plurality of light emitting elements 12W. More specifically, the color filter 15 is provided 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. In the following description, when the red filter section 15FR, the green filter section 15FG, and the blue filter section 15FB are collectively referred to without particular distinction, they may be referred to as a filter section 15F.

The plurality of filter parts 15F are two-dimensionally arranged on the first surface of the protective layer 14 in a prescribed arrangement pattern. The prescribed arrangement pattern is as described as the prescribed arrangement pattern of the plurality of sub-pixels 10. Each filter section 15F is provided above the light emitting element 12W. The subpixel 10R includes a light emitting element 12W and a red filter section 15FR provided above the light emitting element 12W. The subpixel 10G includes a light emitting element 12W and a green filter section 15FG provided above the light emitting element 12W. The subpixel 10B is composed of a light emitting element 12W and a blue filter section 15FB provided above the light emitting element 12W.

The red filter section 15FR transmits red light among the white light emitted from the light emitting element 12W, but can absorb light other than red light. The green filter section 15FG transmits green light among the white light emitted from the light emitting element 12W, but can absorb light other than green light. The blue filter section 15FB transmits blue light among the white light emitted from the light emitting element 12W, but can absorb light other than blue light.

The red filter section 15FR includes, for example, a red color resist. The green filter section 15FG includes, for example, a green color resist. The blue filter section 15FB includes, for example, a blue color resist.

(Filled resin layer 16)
The filled resin layer 16 is filled between the color filter 15 and the cover glass 18. Filled resin layer 16 is provided inside seal portion 17 . The filled resin layer 16 is transparent to each color of light emitted from the color filter 15 . It is preferable that the filled resin layer 16 has transparency to visible light. The filled resin layer 16 may function as an adhesive layer for bonding the color filter 15 and the cover glass 18 together.

The filled resin layer 16 contains, for example, a curable resin. The curable resin includes at least one selected from the group consisting of thermosetting resins, ultraviolet curable resins, and the like. Note that the filled resin layer 16 is not limited to thermosetting resins and ultraviolet curable resins, and may include other types of curable resins than thermosetting resins and ultraviolet curable resins.

(Seal part 17)
The seal portion 17 is provided between the peripheral edge of the first surface of the protective layer 14 and the peripheral edge of the second surface of the cover glass 18 . The seal portion 17 adheres the peripheral edge of the first surface of the protective layer 14 and the peripheral edge of the second surface of the cover glass 18 and seals between the peripheral edge of the protective layer 14 and the peripheral edge of the cover glass 18 .

The seal portion 17 includes, for example, a curable resin. The curable resin includes, for example, at least one selected from the group consisting of thermosetting resins, ultraviolet curable resins, and the like. More specifically, for example, the curable resin includes at least one selected from the group consisting of epoxy resins, acrylic resins, and the like. Note that the curable resin is not limited to thermosetting resins and ultraviolet curable resins, and may include types of curable resins other than thermosetting resins and ultraviolet curable resins.

(Cover glass 18)
The cover glass 18 is provided on the first surface of the filled resin layer 16 and the first surface of the seal portion 17 . The cover glass 18 seals the first surface of the drive substrate 11 on which members such as the plurality of light emitting elements 12W are provided. The cover glass 18 is transparent to each color of light emitted from the color filter 15. It is preferable that the cover glass 18 has transparency to visible light. The cover glass 18 is, for example, a glass substrate.

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

(Formation process of anode 121 and contact electrode 19)
First, a metal layer and a metal oxide layer are sequentially formed on the first surface of the drive substrate 11 by, for example, sputtering, and then the metal layer and metal oxide layer are patterned by, for example, photolithography. As a result, a plurality of anodes 121 and contact electrodes 19 are formed on the first surface of the drive substrate 11. Next, a plurality of convex portions 191 are formed on the first surface of the contact electrode 19 using, for example, photolithography technology.

(Formation process of insulating layer 13)
Next, the insulating layer 13 is formed on the first surface of the drive substrate 11 so as to cover the plurality of anodes 121 and the contact electrodes 19 by, for example, a CVD (Chemical Vapor Deposition) method. Next, a plurality of first openings and one second opening are formed in the insulating layer 13 by, for example, photolithography. As a result, the first surface of each anode 121 is exposed through the first opening, and the first surface of the contact electrode 19 is exposed through the second opening.

(Formation process of OLED layer 122)
Next, for example, by vapor deposition, 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 formed on the drive substrate 11 so as to cover the plurality of anodes 121. The OLED layer 122 is formed by sequentially stacking layers on one surface.

(Formation process of cathode 123)
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 portion of the second surface of the cathode 123 is connected to the first surface of the contact electrode 19.

(Process of forming protective layer 14)
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.

(Formation process of color filter 15)
Next, a colored composition for forming green filter portions is applied on the first surface of the protective layer 14, and after pattern exposure is performed by irradiating ultraviolet rays through a photomask and developed, a plurality of green filter portions 15FG are formed. form. Next, a colored composition for forming a red filter portion is applied onto the first surface of the protective layer 14, and after pattern exposure is performed by irradiating ultraviolet rays through a photomask and then developed, a plurality of red filter portions 15FR are formed. form. Next, a colored composition for forming a blue filter portion is applied on the first surface of the protective layer 14, and after pattern exposure is performed by irradiating ultraviolet rays through a photomask and developing, a plurality of blue filter portions 15FB are formed. form. As a result, the color filter 15 is formed on the first surface of the protective layer 14.

(Sealing process)
Next, a sealant is applied on the peripheral edge of the first surface of the protective layer 14 in a closed loop surrounding the display area R1 to form a frame, and then a filling resin is applied inside the frame. Next, the cover glass 18 is placed on top of the filled resin and sealant. Next, the sealant and the filled resin are cured, for example, by at least one of heat treatment and ultraviolet irradiation treatment. As a result, the peripheral edge of the first surface of the protective layer 14 and the peripheral edge of the second surface of the cover glass 18 are bonded together by the sealing part 17, and the filled resin layer 16 is formed inside the sealing part 17. Note that the method of curing the filled resin and sealant is not limited to heat treatment and ultraviolet irradiation treatment, and may be a curing method other than heat treatment and ultraviolet irradiation treatment. Through the above steps, the display device 101 shown in FIG. 3 is obtained.

[Effect]
In the display device 101 according to the first embodiment, the contact electrode 19 has a plurality of convex portions 191 on the first surface connected to the peripheral edge of the cathode 123. These plurality of convex portions 191 extend in a direction away from the effective pixel region RE1 in a plan view, and are spaced apart from each other in the circumferential direction of the outer periphery of the effective pixel region RE1. Thereby, as shown by the arrow 31 in FIG. 2, a current path (carrier path) can be formed in a portion between the protrusions 191 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1. Therefore, it is possible to increase the contact area between the peripheral edge of the cathode 123 and the contact electrode 19 while ensuring a current path in the direction away from the effective pixel region RE1. Therefore, it is possible to suppress the influence of voltage drop at the connection portion between the peripheral edge of the cathode 123 and the contact electrode 19, and to suppress a decrease in brightness of the display device 101. Further, the frame of the display device 101 can be made narrower, and the display device 101 can be made smaller.

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

<4 Second embodiment>
[Configuration of display device 102]
FIG. 5 is a plan view of the display device 102 according to the second embodiment. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. The display device 102 differs from the display device 101 according to the first embodiment in that the contact electrode 19 has a plurality of protrusion groups 192 instead of the plurality of protrusions 191. The convex portion group 192 is an example of a structure group in the claims.

(Protrusion group 192)
The plurality of convex portion groups 192 are arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1, that is, in the circumferential direction of the contact electrode 19, in plan view. The distance between the convex portion groups 192 adjacent in the circumferential direction of the outer periphery of the effective pixel region RE1 may be constant or may vary.

Each protrusion group 192 includes a plurality of first protrusions 192a and a plurality of second protrusions 192b. In the second embodiment, an example will be described in which each convex group 192 includes a plurality of first convex portions 192a and a plurality of second convex portions 192b. and one second convex portion 192b.

(First convex portion 192a)
The plurality of first convex portions 192a are provided closer to the effective pixel region RE1 than the plurality of second convex portions 192b. The first convex portion 192a is an example of a first structure in the claims. The first convex portion 192a is similar to the convex portion 191 in the first embodiment. However, the length of the first convex portion 192a may be shorter than the length of the convex portion 191 in the first embodiment.

(Second protrusion 192b)
The plurality of second convex portions 192b are provided closer to the peripheral edge of the display device 101 than the plurality of first convex portions 192a. The second convex portion 192b is an example of a second structure in the claims. The second convex portion 192b extends in a direction substantially perpendicular to the extending direction of the first convex portion 192a (that is, substantially the same direction as the circumferential direction of the effective pixel region RE1) in plan view.

In this specification, a direction substantially perpendicular to the extension direction refers to a direction in which the angle with the extension direction is 80° or more and 100° or less. The angle between the extension direction and a direction substantially perpendicular to the extension direction is, for example, 82° or more and 98° or less, 84° or more and 96° or less, 85° or more and 95° or less, 86° or more and 94° or less, and 87°. The angle may be greater than or equal to 93 degrees, less than or equal to 92 degrees, greater than or equal to 89 degrees and less than or equal to 91 degrees, greater than or equal to 89.5 degrees and less than or equal to 90.5 degrees, or greater than or equal to 89.9 degrees and less than or equal to 90.1 degrees.

The plurality of second convex portions 192b have, for example, an elongated shape in plan view. As a specific example of the elongated shape, a shape similar to the convex portion 191 in the first embodiment can be cited. The plurality of second convex portions 192b are spaced apart from each other in a direction moving away from the effective pixel region RE1. When the convex part group 192 includes three or more second convex parts 192b, the distance between the second convex parts 192b adjacent to each other in the direction away from the effective pixel area RE1 may be constant or may vary. Good too.

The second protrusion 192b closest to the effective pixel area RE1 among the plurality of second protrusions 192b may be separated from one end of the plurality of first protrusions 192a, or may be separated from one end of the plurality of first protrusions 192a. It may be connected to FIG. 5 shows an example in which the second protrusion 192b closest to the effective pixel area RE1 among the plurality of second protrusions 192b is separated from the plurality of first protrusions.

[Effect]
In the display device 102 according to the second embodiment, the plurality of convex portion groups 192 are arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1. In addition, the plurality of first convex portions 192a included in the plurality of convex portion groups 192 extend in a direction away from the effective pixel region RE1 in plan view, and are spaced apart in the circumferential direction of the outer periphery of the effective pixel region RE1. are placed apart. As a result, as shown by the arrow 31 in FIG. A current path (carrier path) can be formed in a portion between the first convex portions 192a. Therefore, it is possible to increase the contact area between the cathode 123 and the contact electrode 19 while ensuring a current path in the direction away from the effective pixel region RE1.

In the display device 102 according to the second embodiment, the plurality of second convex portions 192b included in the plurality of convex portion groups 192 are arranged in a direction substantially perpendicular to the extending direction of the first convex portions 192a (i.e., They extend in a direction substantially the same as the circumferential direction of the effective pixel region RE1, and are spaced apart from each other in a direction moving away from the effective pixel region RE1. As a result, as shown by the arrow 33 in FIG. 5, a current path (carrier path) is formed between the second protrusions 192b adjacent to each other in a direction substantially perpendicular to the extending direction of the first protrusion 192a. can do. Therefore, a current path in the circumferential direction of the effective pixel region RE1 can be secured.

<5 Third embodiment>
[Configuration of display device 103]
FIG. 7 is a plan view of the display device 103 according to the third embodiment. FIG. 8 is a plan view showing a part of the peripheral region RE2 in FIG. 7 in an enlarged manner. FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. The display device 103 differs from the display device 101 according to the first embodiment (see FIG. 2) in that the contact electrode 19 has a plurality of protrusion groups 193 instead of the plurality of protrusions 191. The convex portion group 193 is an example of a structure group in the claims.

(Protrusion group 193)
The plurality of convex portion groups 193 are arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1, that is, in the circumferential direction of the contact electrode 19, in plan view. The distance D between the convex portion groups 193 adjacent in the circumferential direction of the outer periphery of the effective pixel region RE1 may be constant or may vary. Each convex group 193 includes a plurality of convex portions 193a.

(Convex portion 193a)
The plurality of convex portions 193a may be two-dimensionally arranged on the first surface of the contact electrode 19 in a prescribed arrangement pattern. The prescribed arrangement pattern may be a matrix shape, a checkerboard pattern, or the like, or may be an arrangement pattern other than these.

The plurality of convex portions 193a may be arranged at intervals _D21 in the circumferential direction of the outer periphery of the effective pixel region RE1 in plan view. The distance _D21 between adjacent convex portions 193a in the circumferential direction of the outer periphery of the effective pixel region RE1 may be constant or may vary.

The plurality of convex portions 193a may be arranged at intervals _D22 in a direction moving away from the effective pixel region RE1 in plan view. The distance _D22 between adjacent convex portions 193a in the direction away from the effective pixel area RE1 may be constant or may vary. The heights of the plurality of protrusions 193a may be substantially the same or may be different.

The convex portion 193a may have a dot shape in plan view, for example. The dot shape may have, for example, a circular shape, an elliptical shape, or a polygonal shape in plan view, or may have a shape other than these. The convex portion 193a may have, for example, a substantially columnar shape, a substantially truncated pyramid shape, a substantially conical shape, or a substantially dome shape, or may have a shape other than these. The plurality of protrusions 193a may include two or more types of protrusions 193a.

(Relationship between distance D ₁₁ , distance D ₂₁ and distance D ₂₂ )
The distance D ₁₁ between the protrusions 193 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1 is larger than the distance D ₂₁ between the protrusions 193a adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1. is preferred. As a result, the current flow in the portion between the convex portion groups 193 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1 is changed from the current flow in the portion between the convex portions 193a adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1. The flow is better than that of

The distance D ₁₁ between the convex portion groups 193 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1 and the distance D ₂₁ between the convex portions 193a adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1 are the effective pixel region. From the viewpoint of ensuring a current path in the direction away from RE1, preferably 1.5×D ₂₁ ≦D ₁₁ , more preferably 2×D ₂₁ ≦D ₁₁ , even more preferably 3×D ₂₁ ≦D ₁₁ , 4× D ₂₁ ≦D ₁₁ , 5×D ₂₁ ≦D ₁₁ or 6×D ₂₁ ≦D ₁₁ . The distance D ₁₁ between the protrusions 193 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1 and the distance D ₂₁ between the protrusions 193a adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1 are From the viewpoint of suppressing a decrease in the contact area between the peripheral edge portion and the contact electrode 19, D ₁₁ ≦10×D ₂₁ is preferably satisfied.

The distance D ₂₂ between the protrusions 193a adjacent in the direction away from the effective pixel area RE1 may be the same as or different from the distance D ₂₁ between the protrusions 193a adjacent in the circumferential direction of the outer periphery of the effective pixel area RE1. You can leave it there. It is preferable that the distance D ₂₂ between the convex portions 193a adjacent to each other in the direction away from the effective pixel region RE1 is smaller than the distance D ₁₁ between the convex portion groups 193 adjacent in the circumferential direction of the outer periphery of the effective pixel region RE1. Thereby, it is possible to suppress a decrease in the number of the plurality of protrusion groups 193 included in each protrusion group 193, and to suppress a decrease in the contact area between the peripheral edge of the cathode 123 and the contact electrode 19.

[Effect]
In the display device 103 according to the third embodiment, the contact electrode 19 has a group of convex portions 193 on the first surface. Thereby, the contact area between the cathode 123 and the contact electrode 19 can be increased. The plurality of convex portion groups 193 are arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1. Thereby, a current path can be secured in the portion between the convex portion groups 193 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1. Therefore, in the display device 103 according to the third embodiment, it is possible to increase the contact area between the cathode 123 and the contact electrode 19 while ensuring a current path in the direction away from the effective pixel region RE1.

<6 Fourth embodiment>
[Configuration of display device 104]
FIG. 10 is a cross-sectional view of a display device 104 according to the fourth embodiment. The display device 104 includes a drive substrate 11, a plurality of light emitting elements (first light emitting element) 12R, a plurality of light emitting elements (second light emitting element) 12G, and a plurality of light emitting elements (third light emitting element) 12B. It includes an electrode 124, a first protective layer 21, a second protective layer 22, and a contact electrode 19. Note that in the fourth embodiment, the same parts as in the first embodiment are given the same reference numerals, and the description thereof will be omitted. In the following description, when the

light emitting elements

12R, 12G, and 12B are collectively referred to without particular distinction, they may be 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.

(

Light emitting elements

12R, 12G, 12B)
The colors of the emitted light 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 control of a drive circuit or the like. The light emitting element 12G can emit green light under control of a drive circuit or the like. The light emitting element 12B can emit blue light under control of a drive circuit or the like. The light emitting element 12 is an OLED (Organic Light Emitting Diode) element. The light emitting element 12R is composed of a subpixel 10R. The light emitting element 12G is composed of a subpixel 10G. The light emitting element 12B is composed of a subpixel 10B.

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

The light emitting element 12R includes an anode 121, an OLED layer 122R, and a cathode 126 on the first surface of the drive substrate 11 in this order. The light emitting element 12G includes an anode 121, an OLED layer 122G, and a cathode 126 on the first surface of the drive substrate 11 in this order. The light emitting element 12B includes an anode 121, an OLED layer 122B, and a cathode 126 on the first surface of the drive substrate 11 in this order. In the fourth embodiment, one of the anode 121 and 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.

(OLED layers 122R, 122G, 122B)
The OLED layer 122R can emit red light. The OLED layer 122G can emit green light. OLED layer 122B can emit blue light.

OLED layers 122R, 122G, and 122B are provided between anode 121 and cathode 126, respectively. The OLED layer 122R includes an organic light emitting layer (hereinafter referred to as "red organic light emitting layer") capable of emitting red light. The OLED layer 122R includes an organic light emitting layer (hereinafter referred to as "green organic light emitting layer") capable of emitting green light. The OLED layer 122B includes an organic light-emitting layer (hereinafter referred to as "blue organic light-emitting layer") that can emit blue light. In the following description, when a red organic light-emitting layer, a green organic light-emitting layer, and a blue organic light-emitting layer are collectively referred to without particular distinction, they may be simply referred to as an organic light-emitting layer.

The OLED layers 122R, 122G, and 112B may be composed of a laminate including an organic light-emitting layer, and in that case, some layers (for example, an electron injection layer) of the laminate may be an inorganic layer. The 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 in this order from the anode 121 to the cathode 126. The 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 in this order from the anode 121 to the cathode 126. The 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 in this order from the anode 121 to the cathode 126.

The red organic light-emitting layer can emit red light by recombining holes injected from the anode 121 and electrons injected from the cathode 126. The green organic light emitting layer can emit green light due to the same phenomenon as the red organic light emitting layer described above. The blue organic light emitting layer can emit blue light due to the same phenomenon as the red organic light emitting layer described above.

(Cathode 126)
The cathode 126 is an individual electrode provided individually for the plurality of light emitting elements 12W within the effective pixel region RE1. That is, the anode 121 is divided between the light emitting elements 12 adjacent to each other in the in-plane direction of the first surface of the drive substrate 11 within the effective pixel region RE1. Cathode 126 is otherwise similar to cathode 123 in the first embodiment.

(First protective layer 21, second protective layer 22)
The first protective layer 21 and the second protective layer 22 are transparent to each color of light emitted from the

light emitting elements

12R, 12G, and 12B. It is preferable that the first protective layer 21 and the second protective layer 22 have transparency to visible light. The first protective layer 21 and the second protective layer 22 can protect the plurality of light emitting elements 12 and the like. For example, the first protective layer 21 and the second protective layer 22 can isolate the plurality of light emitting elements 12 from the outside air, and can suppress moisture intrusion into the plurality of light emitting elements 12 from the external environment.

The first protective layer 21 is provided on the first surface of the drive substrate 11 so as to cover the plurality of light emitting elements 12. The first protective layer 21 has a plurality of contact holes 21H passing through the first protective layer 21 in the thickness direction. The contact hole 21H may be provided within the light emitting region of the light emitting element 12 in plan view, or may be provided outside the light emitting region of the light emitting element 12 in plan view. FIG. 10 shows an example in which the contact hole 21H is provided outside the light emitting region of the light emitting element 12 in plan view. The second protective layer 22 is provided on the first surface of the common electrode 124.

Examples of the materials included in the first protective layer 21 and the second protective layer 22 include the same materials as the protective layer 14 in the first embodiment. The materials contained in the first protective layer 21 and the second protective layer 22 may be the same or different.

(Common electrode 124)
The common electrode 124 is provided on the first surface of the first protective layer 21 . The common electrode 124 is connected between adjacent light emitting elements 12 in the effective pixel area RE1, and is a common electrode for the plurality of light emitting elements 12 provided in the display area 110A. The common electrode 124 is transparent to each light emitted from the

light emitting elements

12R, 12G, and 12B. The common electrode 124 is preferably transparent to visible light. The common electrode 124 extends from the effective pixel region RE1 to the peripheral region RE2. A peripheral 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 provided on the first surface of the contact electrode 19 so as to follow the plurality of convex portions 191 .

The common electrode 124 is connected to each cathode 126 separated for each subpixel 10. Specifically, the common electrode 124 has a plurality of contact parts 125, and each of the plurality of contact parts 125 is provided in the contact hole 21H of the first protective layer 1. As a result, the tips of the plurality of contact portions 125 are respectively connected to the first surface of the cathode 126 separated for each sub-pixel 10.

[Effect]
In the fourth embodiment, the peripheral portion of the common electrode 124 is connected to the contact electrode 19. The contact electrode 19 has the plurality of convex portions 191 described in the first embodiment on the first surface. Therefore, it is possible to increase the contact area between the peripheral portion of the common electrode 124 and the contact electrode 19, and to ensure a current path in the direction away from the effective pixel region RE1.

<7 Fifth embodiment>
[Configuration of display device 105]
FIG. 11 is a cross-sectional view of a display device 105 according to the fifth embodiment. The display device 105 differs from the display device 101 according to the first embodiment (see FIG. 3) in that it further includes a flattening layer 23 and a lens array 24.

(Planarization layer 23)
The planarization layer 23 is provided on the first surface of the color filter 15. The planarization layer 23 has a flat first surface. The flattening layer 23 can fill in the unevenness of the first surface of the color filter 15 and form a flat first surface above the color filter 15 . The planarization layer 23 includes, for example, an inorganic material or a polymer resin. Examples of the inorganic material include the same materials as the inorganic material of the protective layer 14. As the polymer resin, the same material as the polymer resin of the protective layer 14 can be exemplified.

(Lens array 24)
Lens array 24 is provided on the first surface of planarization layer 23 . Lens array 24 includes a plurality of lenses 241. The lens 241 can condense the light emitted upward from the 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.

One lens 241 may be provided above one light emitting element 12W, or two or more lenses 241 may be provided above one light emitting element 12W. FIG. 11 shows an example in which one lens 241 is provided above one light emitting element 12W. The lens 241 may have a curved surface on the exit surface side that outputs the light incident from the light emitting element 12W. The curved surface may be a convex curved surface protruding in a direction away from the light emitting element 12W, or a concave curved surface concave in a direction approaching the light emitting element 12W. Examples of the curved surface include a substantially paraboloidal shape, a substantially hemispherical shape, a substantially semiellipsoidal shape, and the like, but the shape is not limited to these shapes.

The lens array 24 includes, for example, an inorganic material or a polymer resin that is transparent to visible light. Inorganic materials include, for example, silicon oxide (SiO _x ). The polymer resin includes, for example, an ultraviolet curing resin.

(Filled resin layer 16)
In the fifth embodiment, the filled resin layer 16 covers the lens array 24. The refractive index of the filled resin layer 16 is different from the refractive index of the lens array 24. The refractive index of the filled resin layer 16 may be higher or lower than the refractive index of the lens array 24. When the lens 241 has a convex curved surface on the exit surface side, the refractive index of the filled resin layer 16 is preferably lower than the refractive index of the lens array 24 from the viewpoint of improving front brightness. When the lens 241 has a concave curved surface on the exit surface side, the refractive index of the filled resin layer 16 is preferably higher than the refractive index of the lens array 24 from the viewpoint of improving front brightness.

[Effect]
In the fifth embodiment, a lens array 24 is provided above the plurality of light emitting elements 12. Thereby, the light emitted upward from the light emitting element 12W can be focused in the front direction by the lens array 24. Therefore, the front brightness of the display device 105 can be improved.

<8 Modification>
(Modification 1)
The display device 101 according to the first embodiment may include a plurality of convex portions 191 having the following configuration. That is, as shown in FIG. 12, the distance D between adjacent convex portions 191 on the inner circumferential side of the peripheral region RE2 is smaller than the distance D between adjacent convex portions 191 on the outer circumferential side of the peripheral region RE2. It may be wider. The distance D between adjacent convex portions 191 may gradually widen from the outer periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2.

The convex portion 191 may have a side surface that is inclined with respect to the outer periphery of the effective pixel region RE1 in plan view. The width of the convex portion 191 may be gradually narrowed from the outer periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2 in plan view. Here, the width of the protrusion 191 refers to the dimension of the protrusion 191 in the direction perpendicular to the direction in which the protrusion 191 extends. For example, the convex portion 191 may have a triangular shape or a trapezoidal shape in a plan view, or may have a shape other than these. The triangular shape may be, for example, an isosceles triangle. When the convex portion 191 has a triangular shape in a plan view, even if one vertex of the triangular shape is located on the inner circumferential side of the peripheral region RE2 and the remaining two vertices are located on the outer peripheral side of the peripheral region RE2. good. When the convex portion 191 has a trapezoidal shape in plan view, the upper base of the trapezoid 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.

In the display device 101 according to the first modification, the distance D between adjacent convex portions 191 on the inner circumferential side of the peripheral region RE2 is smaller than the distance D between adjacent convex portions 191 on the outer circumferential side of the peripheral region RE2. It's getting wider. This makes it easier for the current flowing from the effective pixel region RE1 toward the peripheral region RE2 to flow into the portion between the protrusions 191 adjacent in the circumferential direction on the outer periphery of the effective pixel region RE1. Therefore, a good current path (carrier path) can be formed in the portion between the circumferentially adjacent convex portions 191 on the outer periphery of the effective pixel region RE1.

The display device 102 according to the second embodiment may have a plurality of convex portions 192a having the same configuration as the plurality of convex portions 191 described in the first modification above. The

display devices

104 and 105 according to the fourth and fifth embodiments may have the plurality of convex portions 191 described in the first modification example above.

(Modification 2)
In the first, fourth, and fifth embodiments described above, an example has been described in which the contact electrode 19 has a plurality of convex portions 191 as a plurality of structures on the first surface, but as shown in FIG. In addition, the contact electrode 19 may have a plurality of concave portions 194 as a plurality of structures on the first surface, or may have a plurality of convex portions 191 and a plurality of concave portions 194 as a plurality of structures. . The concave portion 194 is a structural portion in which the convex portion 191 is inverted.

In the second embodiment described above, an example has been described in which the contact electrode 19 has a plurality of convex portion groups 192 as a plurality of structure groups on the first surface. A group may be provided on the first surface, or a plurality of convex portion groups 192 and a plurality of concave portion groups may be provided on the first surface as a plurality of structure groups. The concave group is a structure group in which the convex group 192 is inverted.

In the second embodiment described above, an example has been described in which the structure group includes a plurality of first convex portions 192a and a plurality of second convex portions 192b. Alternatively, the structure group may include a plurality of second recesses instead of the plurality of second protrusions 192b. The first concave portion is a structural portion in which the first convex portion 192a is inverted, and the second concave portion is a structural portion in which the second convex portion 192b is inverted.

In the second embodiment described above, an example has been described in which the structure group includes a plurality of first protrusions 192a as a plurality of first structures. It may include one convex portion 192a and a plurality of first concave portions. As described above, the first concave portion is a structural portion in which the first convex portion 192a is inverted.

In the second embodiment described above, an example has been described in which the structure group includes a plurality of second convex portions 192b as a plurality of second structures. The convex portion 192b and a plurality of second concave portions may be included. As described above, the second concave portion is a structure obtained by inverting the second convex portion 192b.

In the third embodiment described above, an example was described in which the contact electrode 19 has a plurality of convex groups 193 as a plurality of structure groups on the first surface, but the contact electrode 19 has a plurality of concave groups as a plurality of structure groups. It may be provided on the first surface, or a plurality of convex portion groups 193 and a plurality of recessed portion groups may be provided on the first surface as a plurality of structure groups. The concave portion group is a structure group in which the convex portion group 193 is inverted. The depths of the plurality of recesses included in the recess group may be substantially the same or may be different.

In the third embodiment described above, an example in which the structure group includes a plurality of convex portions 193a has been described, but the structure group may also include a plurality of convex portions 193a and a plurality of concave portions. The concave portion is a structural portion in which the convex portion 193a is inverted.

(Modification 3)
In the third embodiment described above, an example has been described in which the plurality of convex portion groups 193 are arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1, but as shown in FIG. The convex portion group 193 may be arranged two-dimensionally. Specifically, the plurality of convex portion groups 193 may be arranged at intervals in the circumferential direction of the outer periphery of the effective pixel region RE1, and may be arranged at intervals in the direction moving away from the effective pixel region RE1. The distance _D11 between the convex portion groups 193 adjacent in the circumferential direction of the outer periphery of the effective pixel region RE1 may be constant or may vary. The distance _D12 between the protrusion group 193 adjacent in the direction away from the effective pixel area RE1 may be constant or may vary.

It is preferable that the distance D ₁₂ between the protrusions 193 adjacent in the direction away from the effective pixel area RE1 is larger than the distance D ₂₂ between the protrusions 193a adjacent in the direction away from the effective pixel area RE1. As a result, the current flow in the portion between the convex portion groups 193 adjacent in the direction away from the effective pixel region RE1 is compared to the current flow in the portion between the convex portions 193a adjacent in the direction away from the effective pixel region RE1. It gets better. In FIG. 14, an arrow 34 represents an image of a current path formed in a portion between adjacent convex portion groups 193 in a direction moving away from the effective pixel region RE1.

The distance D ₁₂ between the protrusion groups 193 adjacent in the direction away from the effective pixel area RE1 and the distance D ₂₂ between the protrusions 193a adjacent in the direction away from the effective pixel area RE1 are based on the outer circumference of the effective pixel area RE1. From the viewpoint of ensuring a current path in the circumferential direction, preferably 1.5×D ₂₂ ≦D ₁₂ , more preferably 2×D ₂₂ ≦D ₁₂ , even more preferably 3×D ₂₂ ≦D ₁₂ , 4×D ₂₂ ≦D ₁₂ , 5×D ₂₂ ≦D ₁₂ or 6×D ₂₂ ≦D ₁₂ . The distance D ₁₂ between the protrusions 193 adjacent in the direction away from the effective pixel area RE1 and the distance D ₂₂ between the protrusions 193a adjacent in the direction away from the effective pixel area RE1 are in contact with the peripheral edge of the cathode 123. From the viewpoint of suppressing a decrease in the contact area of the electrode 19, D ₁₂ ≦10×D ₂₂ is preferably satisfied.

(Modification 4)
In the third embodiment described above, the height of the plurality of convex portions 193a provided on the inner circumferential side of the peripheral region RE2 is the same as that of the plurality of convex portions 193a provided on the outer circumferential side of the peripheral region RE2, as shown in FIG. The height may be lower than the height of the convex portion 193a. More specifically, for example, the height of the plurality of convex portions 193a may gradually decrease from the outer periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2. In this case, it is possible to prevent the circumferential edge of the cathode 123 from being cut due to the step difference between the plurality of convex portions 193a or from becoming thinner at the circumferential edge portion of the cathode 123 due to the step difference between the plurality of convex portions 193a. Therefore, it becomes easier to ensure a current path (carrier path) in the direction away from the effective pixel area RE1.

In the second embodiment, even if the heights of the plurality of first convex portions 192a and the plurality of second convex portions 192b change in the same way as the plurality of convex portions 193a described in the above modification 4, good.

As explained in Modification 2, when the contact electrode 19 has a plurality of recess groups as a plurality of structure groups on the first surface, the recesses provided on the inner circumferential side of the peripheral region RE2. The depth may be shallower than the depth of the plurality of recesses provided on the outer circumferential side of the peripheral region RE2. More specifically, for example, the depth of the plurality of recesses may gradually become shallower from the outer 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 of the cathode 123 from being cut due to the step difference between the plurality of recesses, or to prevent the electrode thickness at the peripheral edge of the cathode 123 from becoming thinner due to the step difference between the plurality of recesses. Therefore, it becomes easier to ensure a current path (carrier path) in the direction away from the effective pixel area RE1.

(Modification 5)
In the third embodiment described above, the plurality of convex portions 193a may have at least one step, as shown in FIG. 16. The heights of the plurality of protrusions 193a may be the same or different. The number of stages of the plurality of protrusions 193a provided on the inner circumferential side of the peripheral region RE2 may be greater than the number of stages of the plurality of protrusions 193a provided on the outer circumferential side of the peripheral region RE2. Thereby, the step difference between the plurality of convex portions 193a provided on the inner circumferential side of the peripheral region RE2 can be made smaller than the step difference between the plurality of convex portions 193a provided on the outer circumferential side of the peripheral region RE2. Therefore, it is possible to prevent the peripheral edge of the cathode 123 from being cut due to the step difference between the plurality of convex portions 193a or from becoming thinner at the peripheral edge portion of the cathode 123 due to the step difference between the plurality of convex portions 193a. Therefore, it becomes easier to ensure a current path (carrier path) in the direction away from the effective pixel area RE1.

The number of stages of the plurality of convex portions 193a may gradually increase from the outer periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2. Thereby, the step difference between the plurality of convex portions 193a can be gradually reduced from the outer periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2.

(Modification 6)
In the third embodiment described above, the inclination angles θ of the side surfaces of the plurality of convex portions 193a may be different, as shown in FIG. 17. The inclination angle θ of the side surface of the plurality of convex portions 193a provided on the inner circumferential side of the peripheral region RE2 is smaller than the inclination angle θ of the plurality of convex portions 193a provided on the outer circumferential side of the peripheral region RE2. Good too. More specifically, for example, the inclination angle θ of the plurality of convex portions 193a may gradually become smaller from the outer circumference of the peripheral region RE2 toward the inner circumference of the peripheral region RE2. In this case, it is possible to prevent the peripheral edge of the cathode 123 from being cut by the side surfaces of the plurality of protrusions 193a or to reduce the thickness of the peripheral edge of the cathode 123 due to the side surfaces of the plurality of protrusions 193a. Therefore, it becomes easier to ensure a current path (carrier path) in the direction away from the effective pixel area RE1.

As explained in Modification 2, when the contact electrode 19 has a plurality of recess groups as a plurality of structure groups on the first surface, even if the inclination angles θ of the side surfaces of the plurality of recesses are different. good. The inclination angle θ of the side surfaces of the plurality of recesses provided on the inner circumferential side of the peripheral region RE2 may be smaller than the inclination angle θ of the plurality of recesses provided on the outer circumferential side of the peripheral region RE2. More specifically, for example, the inclination angle θ of the plurality of recesses may gradually become smaller from the outer periphery of the peripheral region RE2 toward the inner periphery of the peripheral region RE2.

(Modification 7)
In the first to fifth embodiments described above, 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 an LED (Light Emitting Diode), an inorganic A self-luminous light emitting element such as an electroluminescence (IEL) element or a semiconductor laser element may be used. A display device may be equipped with two or more types of light emitting elements.

(Modification 8)
In the first to fifth embodiments described above, an example in which the light emitting device is a display device has been described, but the light emitting device is not limited to a display device, and may be a lighting device or the like.

(Modification 9)
In the fourth embodiment described above, an example was 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, in the

display devices

102, 103, and 104 according to the second, third, and fourth embodiments, the plurality of light emitting elements 12W and the color filter 15 may be replaced with Therefore, a plurality of

light emitting elements

12R, 12G, and 12B may be provided.

(Modification 10)
In the first, second, third, and fifth embodiments described above, the anode 121 and the cathode 123 are an individual electrode (second electrode) and a common electrode (first electrode), respectively, and the peripheral portion of the cathode 123 is a contact. Although an example in which the anode 121 and the cathode 123 are connected to the electrode 19 has been described, the anode 121 and the cathode 123 are a common electrode (first electrode) and an individual electrode (second electrode), respectively, and the peripheral part of the anode 121 is connected to the contact electrode 19. Good too. In this case, the positions of the anode 121 and cathode 123 may be interchanged.

In the fourth embodiment described above, an example will be described in which the anode 121 and the cathode 126 are individual electrodes (third electrode) and individual electrodes (fourth electrode), respectively, and a plurality of cathodes 126 are connected to the common electrode 124. However, the anode 121 and the cathode 126 may be an individual electrode (third electrode) and an individual 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 cathode 126 may be interchanged.

(Modification 11)
In the second embodiment described above, an example in which the first convex portion 192a is the same as the convex portion 191 in the first embodiment has been described, but the first convex portion 192a is the same as the convex portion 191 in the first embodiment. It doesn't have to be the same. For example, the first convex portion 192a may have a dot shape in plan view. In this case, the plurality of first convex portions 192a may be arranged one-dimensionally or two-dimensionally. In the case of one-dimensional arrangement, the plurality of first convex portions 192a may be spaced apart from each other and lined up in the circumferential direction of the outer periphery of the effective pixel region RE1. In the case of a two-dimensional arrangement, the plurality of first protrusions 192a may be arranged in a two-dimensional manner similar to the plurality of protrusions 193a in the third embodiment.

(Modification 12)
In the fourth embodiment, the display device 104 may further include a filled resin layer 16, a seal portion 17, and a cover glass 18. In this case, the filled resin layer 16 and the seal portion 17 may be provided on the first surface of the second protective layer 22.

(Modification 13)
In the first, second, third, and fifth embodiments, examples in which the color filter 15 is provided have been described; however, a quantum dot layer may be provided in place of the color filter 15, or a quantum dot layer may be provided together with the color filter 15. A dot layer may also be provided. The quantum dot layer includes quantum dots (semiconductor particles) and can convert the color of light emitted from the plurality of light emitting elements. As the plurality of light emitting elements, a plurality of light emitting elements 20B may be provided instead of the plurality of light emitting elements 20W.

(Other variations)
Although the first to fifth embodiments of the present disclosure and their modifications have been specifically described above, the present disclosure is limited to the first to fifth embodiments and their modifications. Rather, various modifications are possible based on the technical idea of the present disclosure.

For example, the configurations, methods, processes, shapes, materials, numerical values, etc. mentioned in the first to fifth embodiments and their modifications are merely examples, and different configurations, methods, Processes, shapes, materials, numerical values, etc. may also be used.

The configurations, methods, processes, shapes, materials, numerical values, etc. of the first to fifth embodiments and their modifications can be combined with each other without departing from the gist of the present disclosure.

Unless otherwise specified, the materials exemplified in the first to fifth embodiments and their modifications can be used alone or in combination of two or more.

Further, the present disclosure can also adopt the following configuration.
(1)
A light emitting device including a plurality of light emitting elements in a light emitting region,
a contact electrode provided in a peripheral region located around the light emitting region;
a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode;
The contact electrode has a plurality of first structures in a portion connected to the first electrode,
The plurality of first structures extend in a direction away from the light emitting region,
Light emitting device.
(2)
The plurality of first structures include at least one of a plurality of first recesses and a plurality of first protrusions.
The light emitting device according to (1) or (2).
(3)
The contact electrode has a loop shape surrounding the light emitting region,
The light emitting device according to (1) or (2).
(4)
The direction away from the light emitting region is a direction perpendicular to the outer periphery of the light emitting region or a direction oblique to the outer periphery of the light emitting region.
The light emitting device according to any one of (1) to (3).
(5)
The plurality of first structures are arranged in a circumferential direction around the outer periphery of the light emitting region,
The distance between the adjacent first structures on the inner circumferential side of the peripheral area is wider than the distance between the adjacent first structures on the outer circumferential side of the peripheral area.
The light emitting device according to any one of (1) to (4).
(6)
The contact electrode further includes a plurality of second structures in a portion connected to the first electrode,
The plurality of second structures extend in a direction substantially perpendicular to the direction in which the first structures extend,
The plurality of first structures are provided closer to the light emitting region than the plurality of second structures,
The light emitting device according to any one of (1) to (5).
(7)
The light emitting area is an effective pixel area,
the first electrode is a cathode,
The light emitting device according to any one of (1) to (6).
(8)
a plurality of second electrodes provided in the light emitting region;
further comprising: an organic light emitting layer provided between the plurality of second electrodes and the first electrode;
The light emitting device according to any one of (1) to (7).
(9)
a plurality of third electrodes provided in the light emitting region;
a plurality of fourth electrodes provided in the light emitting region;
a plurality of organic light emitting layers provided in the light emitting region;
The organic light emitting layer is provided between the third electrode and the fourth electrode,
The first electrode is connected to the plurality of fourth electrodes,
The light emitting device according to any one of (1) to (7).
(10)
A light emitting device including a plurality of light emitting elements in a light emitting region,
a contact electrode provided in a peripheral region located around the light emitting region;
a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode;
The contact electrode has a plurality of structure groups in a portion connected to the first electrode,
The plurality of structure groups are arranged at least in the circumferential direction of the outer periphery of the light emitting region,
Each of the structure groups includes a plurality of structures,
The structures adjacent to each other in the circumferential direction are separated from each other,
Light emitting device.
(11)
The plurality of structures include at least one of a plurality of recesses and a plurality of protrusions.
The light emitting device according to (10).
(12)
The distance between the structure groups adjacent in the circumferential direction is greater than the distance between the adjacent structures,
The light emitting device according to (10) or (11).
(13)
The plurality of structures are two-dimensionally arranged in the circumferential direction and in a direction substantially perpendicular to the circumferential direction,
The distance between the structures adjacent in the circumferential direction is greater than the distance between the structures adjacent in the circumferential direction,
The light emitting device according to (10) or (11).
(14)
The plurality of structure groups are two-dimensionally arranged in the circumferential direction and in a direction substantially perpendicular to the circumferential direction,
The structure groups adjacent to each other in a direction substantially perpendicular to the circumferential direction are separated from each other,
The light emitting device according to (10) or (11).
(15)
The plurality of structures are two-dimensionally arranged in the circumferential direction and in a direction substantially perpendicular to the circumferential direction,
The distance between the structures adjacent in the circumferential direction is greater than the distance between the structures adjacent in the circumferential direction,
A distance between the structures adjacent in a direction substantially perpendicular to the circumferential direction is greater than a distance between the structures adjacent in a direction substantially perpendicular to the circumferential direction.
The light emitting device according to (14).
(16)
The plurality of structures are two-dimensionally arranged,
The plurality of recesses become shallower from the outer periphery toward the inner periphery of the peripheral region,
The plurality of convex portions become lower from the outer periphery toward the inner periphery of the peripheral region,
The light emitting device according to (11).
(17)
The plurality of structures are two-dimensionally arranged,
The plurality of structures have at least one step,
The number of stages of the plurality of structures increases from the outer periphery to the inner periphery of the peripheral area,
The light emitting device according to any one of (10) to (15).
(18)
The plurality of structures are two-dimensionally arranged,
The angle of inclination of the side surfaces of the plurality of structures decreases from the outer periphery toward the inner periphery of the peripheral region,
The light emitting device according to any one of (10) to (15).
(19)
The plurality of structures have a dot shape in plan view,
The light emitting device according to any one of (10) to (18).
(20)
An electronic device comprising the light emitting device according to any one of (1) to (19).

<9 Relationship between normal lines passing through the centers of the light emitting section, lens member, and wavelength selection section>
The following describes the relationship between the normal LN passing through the center of the light emitting section, the normal LN' passing through the center of the lens member, and the normal LN'' passing through the center of the wavelength selection section. Here, the light emitting section is For example, they are 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 section is, for example, the filter section 15F.

Note that the size of the wavelength selection section may be changed as appropriate depending on the light emitted by the light emitting section, or a light absorption section (for example, a black matrix section) may be provided between the wavelength selection sections of adjacent light emitting sections. is provided, the size of the light absorbing section may be changed as appropriate depending on the light emitted by the light emitting section. Further, the size of the wavelength selection section may be changed as appropriate depending on the distance (offset amount) d ₀ between the normal line passing through the center of the light emitting section and the normal line passing through the center of the wavelength selection section. The planar shape of the wavelength selection section may be the same as, similar to, or different from the planar shape of the lens member.

Hereinafter, with reference to FIGS. 18A, 18B, 18C, and 19, the normal line passing through the center of each part when the light emitting part 51, the wavelength selection part 52, and the lens member 53 are arranged in this order will be described. Explain the relationship.

As shown in FIG. 18A, the normal line LN passing through the center of the light emitting section 51, the normal line LN'' passing through the center of the wavelength selection section 52, and the normal line LN' passing through the center of the lens member 53 coincide. In other words, D ₀ =0, d ₀ =0. However, D ₀ is the normal line LN passing through the center of the light emitting part 51 and the normal line LN' passing through the center of the lens member 53. _d0 represents the distance (offset amount) between the normal line LN passing through the center of the light emitting section 51 and the normal line LN'' passing through the center of the wavelength selection section 52. .

As shown in FIG. 18B, the normal line LN passing through the center of the light emitting section 51 and the normal line LN'' passing through the center of the wavelength selection section 52 are the same, but the normal line passing through the center of the light emitting section 51 The normal line LN'' passing through the center of LN and the wavelength selection section 52 and the normal line LN' passing through the center of the lens member 53 may not match. That is, D ₀ >0, d ₀ =0 may be satisfied.

As shown in FIG. 18C, the normal LN passing through the center of the light emitting section 51, the normal LN'' passing through the center of the wavelength selection section 52, and the normal LN' passing through the center of the lens member 53 coincide. Instead, the normal line LN'' passing through the center of the wavelength selection section 52 and the normal line LN' passing through the center of the lens member 53 may be configured to match. That is, D ₀ >0, d ₀ >0, and D ₀ =d ₀ may be satisfied.

As shown in FIG. 19, the normal LN passing through the center of the light emitting section 51, the normal LN'' passing through the center of the wavelength selection section 52, and the normal LN' passing through the center of the lens member 53 are all In other words, D ₀ >0, d ₀ >0, and D ₀ ≠d ₀ may be configured. Here, the center of the light emitting section 51 and the center of the lens member 53 (in FIG. 19 It is preferable that the center of the wavelength selection section 52 (the position indicated by a black square in FIG. 19) be located on the straight line LL connecting the center of the light emitting section 51 and the wavelength The distance in the thickness direction (vertical direction in FIG. 19) between the center of the selection part 52 is LL ₁ , and the distance in the thickness direction between the center of the wavelength selection part 52 and the center of the lens member 53 is When set to LL ₂ ,
D ₀ >d ₀ >0
After taking into account manufacturing variations,
d ₀ :D ₀ =LL ₁ :(LL ₁ +LL ₂ )
It is preferable to satisfy the following.
Here, the thickness direction refers to the thickness direction of the light emitting section 51, the wavelength selection section 52, and the lens member 53.

Hereinafter, with reference to FIGS. 20A, 20B, and 21, the relationship between the normal lines passing through the center of each part when the light emitting part 51, the lens member 53, and the wavelength selection part 52 are arranged in this order will be explained. do.

As shown in FIG. 20A, the normal LN passing through the center of the light emitting section 51, the normal LN'' passing through the center of the wavelength selection section 52, and the normal LN' passing through the center of the lens member 53 coincide. In other words, D ₀ >0 and d ₀ =0 may be used.

As shown in FIG. 20B, the normal LN passing through the center of the light emitting section 51, the normal LN'' passing through the center of the wavelength selection section 52, and the normal LN' passing through the center of the lens member 53 are coincident with each other. Instead, the normal line LN'' passing through the center of the wavelength selection section 52 and the normal line LN' passing through the center of the lens member 53 may be configured to match. That is, D ₀ >0, d ₀ >0, and D ₀ =d ₀ may be satisfied.

As shown in FIG. 21, the normal LN passing through the center of the light emitting section 51, the normal LN'' passing through the center of the wavelength selection section 52, and the normal LN' passing through the center of the lens member 53 are all The center of the lens member 53 (the position indicated by the black square in FIG. 21) is preferably located.Specifically, the distance between the center of the light emitting part 51 and the center of the lens member 53 in the thickness direction (in the vertical direction in FIG. 21) is preferably located. _LL2 , when the distance in the thickness direction between the center of the lens member 53 and the center of the wavelength selection section 52 is _LL1 ,
d ₀ >D ₀ >0
After taking into account manufacturing variations,
D ₀ :d ₀ =LL ₂ :(LL ₁ +LL ₂ )
It is preferable to satisfy the following.
Here, the thickness direction refers to the thickness direction of the light emitting section 51, the wavelength selection section 52, and the lens member 53.

<10 Example of resonator structure>
A pixel used in the display device according to the present disclosure described above can be configured to include a resonator structure that resonates light generated by a light emitting element. Hereinafter, the resonator structure will be explained with reference to the drawings. Furthermore, in the following description, the first surface of each layer may be referred to as an upper surface.

(Resonator structure: 1st example)
FIG. 22A is a schematic cross-sectional view for explaining a first example of the resonator structure. In the following description, when the light emitting elements provided corresponding to the

subpixels

10R, 10G, and 10B are collectively referred to without particular distinction, they may be referred to as the light emitting elements 12. When distinguishing the light emitting elements provided corresponding to the

subpixels

10R, 10G, and 10B, they may be referred to as light emitting elements _12R , _12G , and _12B . Portions of the OLED layer 122 corresponding to the

subpixels

10R, 10G, and 10B are sometimes referred to as an OLED layer _122R , an OLED layer _122G , and an OLED layer _122B . The anode 121 and 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, or fifth embodiment, or may be the

light emitting element

12R, 12G, or 12B in the fourth embodiment.

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

A reflective plate 71 is disposed below the first electrode 121 of the light emitting element 12 with an optical adjustment layer 72 sandwiched therebetween. A resonator structure is formed between the reflection plate 71 and the second electrode 123 to resonate the light generated by the OLED layer 122. In the following description, the optical adjustment layers 72 provided corresponding to the sub-pixels 10R, 10G, and 10B may be referred to as optical adjustment layers _72R , _72G , and _72B .

The reflecting plate 71 is formed to have a common thickness in each light emitting element 12. The thickness of the optical adjustment layer 72 varies depending on the color that the pixel should display. By having the optical adjustment layers _72R , _72G , and _72B having different thicknesses, it is possible to set an optical distance that produces optimal resonance for the wavelength of light corresponding to the color to be displayed.

In the example shown in FIG. 22A, the upper surfaces of the reflecting plates 71 in the light emitting elements 12 _R , 12 _G , and 12 _B are arranged so as to be aligned. As described above, the thickness of the optical adjustment layer 72 differs depending on the color to be displayed by the pixel, so the position of the upper surface of the second electrode 123 depends on the type of light emitting elements 12 _R , 12 _G , 12 _B. It differs depending on the

The reflective plate 71 can be formed using, for example, metals such as aluminum (Al), silver (Ag), copper (Cu), or alloys containing these as main components.

The optical adjustment layer 72 is made of an inorganic insulating material such as silicon nitride (SiN _x ), silicon oxide (SiO _x ), silicon oxynitride (SiO _x N _y ), or an organic resin such as acrylic resin or polyimide resin. It can be constructed using materials. The optical adjustment layer 72 may be a single layer or may be a laminated film of a plurality of these materials. Further, the number of laminated layers may differ depending on the type of light emitting element 12.

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

The second electrode 123 needs to function as a semi-transparent reflective film. The second electrode 123 is formed using magnesium (Mg), silver (Ag), a magnesium silver alloy (MgAg) containing these as main components, or an alloy containing an alkali metal or alkaline earth metal. be able to.

(Resonator structure: second example)
FIG. 22B is a schematic cross-sectional view for explaining a second example of the resonator structure.

In the second example as well, the first electrode 121 and the second electrode 123 are formed with a common thickness in each light emitting element 12.

In the second example as well, the reflective plate 71 is arranged under the first electrode 121 of the light emitting element 12 with the optical adjustment layer 72 sandwiched therebetween. A resonator structure is formed between the reflective plate 71 and the second electrode 123 to resonate the light generated by the OLED layer 122. Similar to the first example, the reflective plate 71 is formed to have a common thickness in each light emitting element 12, and the thickness of the optical adjustment layer 72 differs depending on the color to be displayed by the pixel.

In the first example shown in FIG. 22A, the upper surfaces of the reflective plates 71 in the light emitting elements 12 _R , 12 _G , and 12 _B are arranged so as to be aligned, and the upper surfaces of the second electrodes 123 are located in the same position as in the light emitting elements 12 _R , 12 _{G .} , 12 differed depending on the type of _B.

On the other hand, in the second example shown in FIG. 22B, the upper surfaces of the second electrode 123 are arranged so that the upper surfaces of the light emitting elements 12 _R , 12 _G , and 12 _B are aligned. In order to align the upper surfaces of the second electrodes 123, the upper surfaces of the reflectors 71 in the light emitting elements 12 _R , 12 _G , and 12 _B are arranged differently depending on the type of the light emitting elements 12 _R , 12 _G , and 12 _B. There is. Therefore, the lower surface of the reflecting plate 71 (in other words, the upper surface of the base layer (insulating layer) 73) has a stepped shape depending on the type of the light emitting element 12.

The materials constituting the reflecting plate 71, the optical adjustment layer 72, the first electrode 121, and the second electrode 123 are the same as those described in the first example, so their explanation will be omitted.

(Resonator structure: 3rd example)
FIG. 23A is a schematic cross-sectional view for explaining a third example of the resonator structure. In the following description, the reflection plates 71 provided corresponding to the sub-pixels 10R, 10G, and 10B may be referred to as reflection plates _71R , _71G , and _71B .

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

Also in the third example, the reflective plate 71 is disposed below the first electrode 121 of the light emitting element 12 with the optical adjustment layer 72 sandwiched therebetween. A resonator structure that resonates light generated by the OLED layer 122 is formed between the reflection plate 71 and the second electrode 123. Similar to the first and second examples, the thickness of the optical adjustment layer 72 differs depending on the color that the pixel should display. As in the second example, the positions of the upper surfaces of the second electrodes 123 are arranged to be aligned with the light emitting elements 12 _R , 12 _G , and 12 _B.

In the second example shown in FIG. 22B, in order to align the upper surfaces of the second electrodes 123, the lower surface of the reflection plate 71 had a stepped shape depending on the type of light emitting element 12.

On the other hand, in the third example shown in FIG. 23A, the film thickness of the reflection plate 71 is set to be different depending on the type of the light emitting elements 12 _R , 12 _G , and 12 _B. More specifically, the film thickness is set so that the lower surfaces of the reflecting

plates

71 _R , 71 _G , and 71 _B are aligned.

(Resonator structure: 4th example)
FIG. 23B is a schematic cross-sectional view for explaining a fourth example of the resonator structure. In the following description, the first electrodes 121 provided corresponding to the

subpixels

10R, 10G, and 10B may be referred to as first electrodes _121R , _121G , and _121B .

In the first example shown in FIG. 22A, the first electrode 121 and second electrode 123 of each light emitting element 12 are formed with a common thickness. A reflective plate 71 is disposed below the first electrode 121 of the light emitting element 12 with the optical adjustment layer 72 sandwiched therebetween.

On the other hand, in the fourth example shown in FIG. 23B, the optical adjustment layer 72 is omitted, and the film thickness of the first electrode 121 is set to be different depending on the types of the light emitting elements 12 _R , 12 _G , and 12 _B. .

The reflecting plate 71 is formed to have a common thickness in each light emitting element 12. The thickness of the first electrode 121 varies depending on the color that the pixel should display. By having the

first electrodes

121 _R , 121 _G , and 121 _B having different thicknesses, it is possible to set an optical distance that produces optimum resonance for the wavelength of light corresponding to the color to be displayed.

(Resonator structure: 5th example)
FIG. 24A is a schematic cross-sectional view for explaining a fifth example of the resonator structure.

In the first example shown in FIG. 22A, the first electrode 121 and the second electrode 123 are formed with a common thickness in each light emitting element 12. A reflective plate 71 is disposed below the first electrode 121 of the light emitting element 12 with the optical adjustment layer 72 sandwiched therebetween.

On the other hand, in the fifth example shown in FIG. 24A, the optical adjustment layer 72 is omitted, and an oxide film 74 is formed on the surface of the reflection plate 71 instead. The thickness of the oxide film 74 was set to be different depending on the type of the light emitting elements 12 _R , 12 _G , and 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 _74R , _74G , and _74B .

The thickness of the oxide film 74 varies depending on the color that the pixel should display. By having the

oxide films

74 _R , 74 _G , and 74 _B having different thicknesses, it is possible to set an optical distance that produces optimum resonance for the wavelength of light corresponding to the color to be displayed.

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

The oxide film 74, which has a different thickness depending on the type of the light emitting elements _12R , _12G , and _12B , can be formed, for example, as follows.

First, a container is filled with an electrolytic solution, and the substrate on which the reflective plate 71 is formed is immersed in the electrolytic solution. Further, electrodes are arranged so as to face the reflection plate 71.

Then, a positive voltage is applied to the reflective plate 71 using the electrode as a reference, and the reflective plate 71 is anodized. The thickness of the oxide film formed by anodic oxidation is proportional to the voltage value applied to the electrode. Therefore, anodic oxidation is performed while applying a voltage depending on the type of light emitting element 12 to each of the reflecting

plates

71 _R , 71 _G , and 71 _B. Thereby, oxide films 74 having different thicknesses can be formed all at once.

The materials constituting the reflecting plate 71, the first electrode 121, and the second electrode 123 are the same as those described in the first example, so the description thereof will be omitted.

(Resonator structure: 6th example)
FIG. 24B is a schematic cross-sectional view for explaining a sixth example of the resonator structure.

In the sixth example, the light emitting element 12 is configured by laminating a first electrode 121, an OLED layer 122, and a second electrode 123. However, in the sixth example, the first electrode 121 is formed to serve both as an electrode and a reflector. The first electrode (also serving as a reflection plate) 121 is made of a material having optical constants selected depending on the types of the light emitting elements 12 _R , 12 _G , and 12 _B. By varying the phase shift caused by the first electrode (also serving as a reflecting plate) 121, it is possible to set an optical distance that produces optimum resonance for the wavelength of light corresponding to the color to be displayed.

The first electrode (also serving as a reflection plate) 121 can be made of a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing these as main components. For example, the first electrode (cum-reflector) _121R of the light-emitting element 12R is formed of copper (Cu), and the first electrode (cum-reflector) _121G of the light _- emitting element _12G and the first electrode of the light-emitting element _12B are formed of copper (Cu). (also serving as a reflection plate) _121B may be formed of aluminum.

The materials constituting the second electrode 123 are the same as those described in the first example, so their description will be omitted.

(Resonator structure: 7th example)
FIG. 25 is a schematic cross-sectional view for explaining a seventh example of the resonator structure.

The seventh example basically has a configuration in which the sixth example is applied to the light emitting elements 12 _R and 12 _G , and the first example is applied to the light emitting element 12 _B. Also in this configuration, it is possible to set an optical distance that produces optimum resonance for the wavelength of light corresponding to the color to be displayed.

The first electrodes (cum-reflection plates) 121 _R and 121 _G used in the light emitting elements 12 _R and 12 _G are made of a simple metal such as aluminum (Al), silver (Ag), gold (Au), copper (Cu), It can be constructed from an alloy containing these as main components.

The materials and the like constituting the reflecting plate 71 _B , the optical adjustment layer 72 _B , and the first electrode 121 _B used in the light emitting element 12 _B are the same as those described in the first example, so the description thereof will be omitted.

<11 Application examples>
(Electronics)
The

display devices

101, 102, 103, 104, and 105 (hereinafter referred to as "display devices 101, etc.") according to the first to fifth embodiments and their modifications may be included in various electronic devices. good. The display device 101 and the like are particularly suitable for eyewear devices such as head-mounted displays, or electronic viewfinders of video cameras or single-lens reflex cameras, which require high resolution and are used close to the eyes with magnification.

(Specific example 1)
26A and 26B show an example of the appearance of the digital still camera 310. This digital still camera 310 is a single-lens reflex type with interchangeable lenses, and has an interchangeable photographic lens unit (interchangeable lens) 312 approximately in the center of the front of a camera body 311, and on the left side of the front. It has a grip part 313 for the photographer to hold.

A monitor 314 is provided at a position shifted to the left from the center of the back surface of the camera body 311. An electronic viewfinder (eyepiece window) 315 is provided at the top of the monitor 314 . By looking through the electronic viewfinder 315, the photographer can visually recognize the light image of the subject guided from the photographic lens unit 312 and determine the composition. The electronic viewfinder 315 includes any one of the display devices 101 and the like described above.

(Specific example 2)
FIG. 27 shows an example of the appearance of the head mounted display 320. Head mounted display 320 is an example of an eyewear device. The head-mounted display 320 has, for example, ear hooks 322 on both sides of a glasses-shaped display section 321 to be worn on the user's head. The display unit 321 includes any one of the display devices 101 and the like described above.

(Specific example 3)
FIG. 28 shows an example of the appearance of the television device 330. This television device 330 has, for example, a video display screen section 331 that includes a front panel 332 and a filter glass 333, and this video display screen section 331 includes any one of the above-described display devices 101 and the like.

(Specific example 4)
FIG. 29 shows an example of the appearance of the see-through head-mounted display 340. See-through head mounted display 340 is an example of an eyewear device. The see-through head-mounted display 340 includes a main body 341, an arm 342, and a lens barrel 343.

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

The main body section 341 incorporates a control board for controlling the operation of the see-through head-mounted display 340 and a display section. The arm 342 connects the main body portion 341 and the lens barrel 343 and supports the lens barrel 343. Specifically, the arm 342 is coupled to an end of the main body portion 341 and an end of the lens barrel 343, respectively, and fixes the lens barrel 343. Further, the arm 342 has a built-in signal line for communicating data related to an image provided from the main body 341 to the lens barrel 343.

The lens barrel 343 projects image light provided from the main body 341 via the arm 342 through the eyepiece 351 toward the eyes of the user wearing the see-through head-mounted display 340. In this see-through head-mounted display 340, the display section of the main body section 341 includes one of the display devices 101 and the like described above.

(Specific example 5)
FIG. 30 shows an example of the appearance of a smartphone 360. The smartphone 360 includes a display section 361 that displays various information, and an operation section 362 that includes buttons and the like that accept operation inputs from the user. The display unit 361 includes any one of the display devices 101 and the like described above.

(Specific example 6)
The display device 101 and the like described above may be included in various displays provided in a vehicle.

FIGS. 31A and 31B are diagrams showing an example of the internal configuration of a vehicle 500 equipped with various displays. Specifically, FIG. 31A is a diagram showing an example of the interior of the vehicle 500 from the rear to the front of the vehicle 500, and FIG. 31B is a diagram showing an example of the interior of the vehicle 500 from the diagonal rear to the diagonal front. It is a figure showing an example.

The vehicle 500 includes a center display 501, a console display 502, a head-up display 503, a digital rear mirror 504, a steering wheel display 505, and a rear entertainment display 506. At least one of these displays includes one of the display devices 101 and the like described above. For example, all of these displays may include one of the display devices 101 and the like described above.

The center display 501 is arranged on a part of the dashboard facing the driver's seat 508 and the passenger seat 509. Although FIGS. 31A and 31B show an example of a horizontally long center display 501 extending from the driver's seat 508 side to the passenger seat 509 side, the screen size and placement location of the center display 501 are arbitrary. Center display 501 can display information detected by various sensors. As a specific example, the center display 501 displays images taken by an image sensor, distance images to obstacles in front and sides of the vehicle 500 measured by a ToF sensor, and passenger body temperature detected by an infrared sensor. etc. can be displayed. Center display 501 can be used, for example, to display at least one of safety-related information, operation-related information, life log, health-related information, authentication/identification-related information, and entertainment-related information.

Safety-related information includes information such as detection of falling asleep, detection of looking away, detection of mischief by children in the same vehicle, presence or absence of seatbelts, and detection of leaving passengers behind. This information is detected by The operation-related information uses sensors to detect gestures related to operations by the occupant. The sensed gestures may include manipulation of various equipment within vehicle 500. For example, the operation of air conditioning equipment, navigation equipment, AV equipment, lighting equipment, etc. is detected. The life log includes life logs of all crew members. For example, a life log includes a record of the actions of each occupant during the ride. By acquiring and saving life logs, it is possible to check the condition of the occupants at the time of the accident. For health-related information, the body temperature of the occupant is detected using a sensor such as a temperature sensor, and the health condition of the occupant is estimated based on the detected body temperature. Alternatively, an image sensor may be used to capture an image of the occupant's face, and the occupant's health condition may be estimated from the captured facial expression. Furthermore, it is also possible to have an automatic voice conversation with the occupant and estimate the occupant's health condition based on the occupant's responses. Authentication/identification related information includes a keyless entry function that performs facial recognition using a sensor, and a function that automatically adjusts seat height and position using facial recognition. The entertainment-related information includes a function that uses a sensor to detect operation information of an AV device by a passenger, a function that recognizes the passenger's face using a sensor, and provides the AV device with content suitable for the passenger.

The console display 502 can be used, for example, to display life log information. Console display 502 is arranged near shift lever 511 on center console 510 between driver's seat 508 and passenger seat 509. The console display 502 can also display information detected by various sensors. Further, the console display 502 may display an image around the vehicle captured by an image sensor, or may display a distance image to an obstacle around the vehicle.

The head-up display 503 is virtually displayed behind the windshield 512 in front of the driver's seat 508. Head-up display 503 can be used, for example, to display at least one of safety-related information, operation-related information, life log, health-related information, authentication/identification-related information, and entertainment-related information. Since the head-up display 503 is often placed virtually in front of the driver's seat 508, it is difficult to display information directly related to the operation of the vehicle 500, such as the speed of the vehicle 500 and the remaining amount of fuel (battery). Are suitable.

The digital rear mirror 504 can display not only the rear of the vehicle 500 but also the state of the occupants in the rear seats. Therefore, by arranging a sensor on the back side of the digital rear mirror 504, it can be used for displaying life log information, for example. be able to.

The steering wheel display 505 is placed near the center of the steering wheel 513 of the vehicle 500. Steering wheel display 505 can be used, for example, to display at least one of safety-related information, operation-related information, lifelog, health-related information, authentication/identification-related information, and entertainment-related information. In particular, since the steering wheel display 505 is located near the driver's hands, it is suitable for displaying life log information such as the driver's body temperature, information regarding the operation of AV equipment, air conditioning equipment, etc. There is.

The rear entertainment display 506 is attached to the back side of the driver's seat 508 and passenger seat 509, and is for viewing by passengers in the rear seats. Rear entertainment display 506 can be used, for example, to display at least one of safety-related information, operation-related information, lifelog, health-related information, authentication/identification-related information, and entertainment-related information. In particular, since the rear entertainment display 506 is located in front of the rear seat occupant, information relevant to the rear seat occupant is displayed. For example, information regarding the operation of the AV device or air conditioning equipment may be displayed, or the results of measuring the body temperature of the passenger in the rear seat using a temperature sensor may be displayed.

A configuration may also be adopted in which a sensor is placed on the back side of the display device 101 etc. so that the distance to objects existing in the surroundings can be measured. There are two main types of optical distance measurement methods: passive and active. A passive type sensor measures distance by receiving light from an object without emitting light from the sensor to the object. Passive methods include the lens focusing method, stereo method, and monocular viewing method. The active type measures distance by projecting light onto an object and receiving the reflected light from the object with a sensor. Active types include an optical radar method, an active stereo method, a photometric stereo method, a moiré topography method, an interferometry method, and the like. The display device 101 and the like described above can be applied to any of these methods of distance measurement. By using a sensor placed overlappingly on the back side of the display device 101 or the like, the above-mentioned passive or active distance measurement can be performed.

10R, 10G, 10B Subpixel 11 Drive board 111 Substrate 112

Insulating layer

113, 115

Wiring

114, 116

Contact portion

12W, 12R, 12G, 12B Light emitting element 121 Anode 122

OLED layer

123, 126 Cathode 124 Common electrode 125 Contact portion 13 Insulation Layer 14 Protective layer 15 Color filter 15FR Red filter section 15FG Green filter section 15FB Blue filter section 16 Filled resin layer 17 Seal section 18 Cover glass 19 Contact electrode 191 Convex section 192 Convex group 192a First convex section 192b Second convex section 193 Convex part group 193a Convex part 21 First protective layer 22 Second protective layer 23 Flattening layer 24 Lens array 241

Lens

101, 102, 103, 104, 105, 601 Display device 310 Digital still camera 320 Head mounted display 330 Television device 340 See-through head-mounted display 360 Smartphone 500 Vehicle RE1 Effective pixel area RE2 Peripheral area

Claims

A light emitting device including a plurality of light emitting elements in a light emitting region,
a contact electrode provided in a peripheral region located around the light emitting region;
a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode;
The contact electrode has a plurality of first structures in a portion connected to the first electrode,
The plurality of first structures extend in a direction away from the light emitting region,
Light emitting device.
The plurality of first structures include at least one of a plurality of first recesses and a plurality of first protrusions.
The light emitting device according to claim 1.
The contact electrode has a loop shape surrounding the light emitting region,
The light emitting device according to claim 1.
The direction away from the light emitting region is a direction perpendicular to the outer periphery of the light emitting region or a direction oblique to the outer periphery of the light emitting region.
The light emitting device according to claim 1.
The plurality of first structures are arranged in a circumferential direction around the outer periphery of the light emitting region,
The distance between the adjacent first structures on the inner circumferential side of the peripheral area is wider than the distance between the adjacent first structures on the outer circumferential side of the peripheral area.
The light emitting device according to claim 1.
The contact electrode further includes a plurality of second structures in a portion connected to the first electrode,
The plurality of second structures extend in a direction substantially perpendicular to the direction in which the first structures extend,
The plurality of first structures are provided closer to the light emitting region than the plurality of second structures,
The light emitting device according to claim 1.
The light emitting area is an effective pixel area,
the first electrode is a cathode;
The light emitting device according to claim 1.
a plurality of second electrodes provided in the light emitting region;
further comprising: an organic light emitting layer provided between the plurality of second electrodes and the first electrode;
The light emitting device according to claim 1.
a plurality of third electrodes provided in the light emitting region;
a plurality of fourth electrodes provided in the light emitting region;
a plurality of organic light emitting layers provided in the light emitting region;
The organic light emitting layer is provided between the third electrode and the fourth electrode,
The first electrode is connected to the plurality of fourth electrodes,
The light emitting device according to claim 1.
A light emitting device including a plurality of light emitting elements in a light emitting region,
a contact electrode provided in a peripheral region located around the light emitting region;
a first electrode extending from the light emitting region to the peripheral region and connected to the contact electrode;
The contact electrode has a plurality of structure groups in a portion connected to the first electrode,
The plurality of structure groups are arranged at least in the circumferential direction of the outer periphery of the light emitting region,
Each of the structure groups includes a plurality of structures,
The structures adjacent to each other in the circumferential direction are separated from each other,
Light emitting device.
The plurality of structures include at least one of a plurality of recesses and a plurality of protrusions.
The light emitting device according to claim 10.
The distance between the structure groups adjacent in the circumferential direction is greater than the distance between the adjacent structures,
The light emitting device according to claim 10.
The plurality of structures are two-dimensionally arranged in the circumferential direction and in a direction substantially perpendicular to the circumferential direction,
The distance between the structures adjacent in the circumferential direction is greater than the distance between the structures adjacent in the circumferential direction,
The light emitting device according to claim 10.
The plurality of structure groups are two-dimensionally arranged in the circumferential direction and in a direction substantially perpendicular to the circumferential direction,
The structure groups adjacent to each other in a direction substantially perpendicular to the circumferential direction are separated from each other,
The light emitting device according to claim 10.
The plurality of structures are two-dimensionally arranged in the circumferential direction and in a direction substantially perpendicular to the circumferential direction,
The distance between the structures adjacent in the circumferential direction is greater than the distance between the structures adjacent in the circumferential direction,
A distance between the structures adjacent in a direction substantially perpendicular to the circumferential direction is greater than a distance between the structures adjacent in a direction substantially perpendicular to the circumferential direction.
The light emitting device according to claim 14.
The plurality of structures are two-dimensionally arranged,
The plurality of recesses become shallower from the outer periphery to the inner periphery of the peripheral area,
The plurality of convex portions become lower from the outer periphery toward the inner periphery of the peripheral region,
The light emitting device according to claim 11.
The plurality of structures are two-dimensionally arranged,
The plurality of structures have at least one step,
The number of stages of the plurality of structures increases from the outer periphery to the inner periphery of the peripheral area,
The light emitting device according to claim 10.
The plurality of structures are two-dimensionally arranged,
The angle of inclination of the side surfaces of the plurality of structures decreases from the outer periphery to the inner periphery of the peripheral region,
The light emitting device according to claim 10.
The plurality of structures have a dot shape in plan view,
The light emitting device according to claim 10.
An electronic device comprising the light emitting device according to claim 1.