WO2021201026A1

WO2021201026A1 - Display device and electronic device

Info

Publication number: WO2021201026A1
Application number: PCT/JP2021/013679
Authority: WO
Inventors: 大智今林
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: 2020-03-31
Filing date: 2021-03-30
Publication date: 2021-10-07
Also published as: JP2021163577A

Abstract

A display device provided with: a plurality of anodes separated for each pixel; an insulation layer provided between adjacent anodes; an organic layer covering the plurality of anodes and the insulation layer, and provided in common for the pixels; and a cathode provided on the organic layer. The anodes have a top surface provided at a position higher than the surface of the insulation layer, and a side surface provided between the top surface and the surface of the insulation layer. The anodes have at least one portion wherein the width of the side surface gradually narrows from a top portion to a base portion of the anode.

Description

Display devices and electronic devices

This disclosure relates to a display device and an electronic device including the display device.

In recent years, the development of display devices using organic EL (Electro-Luminescence) elements has progressed. As shown in FIG. 1, the display device covers a plurality of anodes 411 separated for each pixel, an insulating layer 412 provided between adjacent anodes 411, and the plurality of anodes 411 and the insulating layer 412. There is a structure including an organic layer 413 provided in common with the pixels and a cathode 414 provided on the organic layer 413.

In the display device having the above structure, since the current flows between the pixels using the hole injection layer 413A provided directly above each anode 411 as a leak source, chromaticity abnormality occurs at the time of low-luminance light emission. Conventionally, in order to reduce this leakage current, the hole injection layer 413A is divided by any of the following techniques (1) to (3).
(1) By controlling the direction of the vapor deposition when the hole injection layer 413A is deposited by the vapor deposition method, the hole injection layer 413A is divided at the peripheral edge of each pixel as shown in the region 421.
(2) As shown in the region 422, the hole injection layer 413A is divided at the peripheral edge of each pixel by making the shape of the insulating layer 412 between adjacent pixels into an overhang shape.
(3) By providing the groove 423 in the insulating layer 412 between adjacent pixels, the hole injection layer 413A is divided between the adjacent pixels (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2012-216338

However, in any of the above-mentioned conventional structures, the insulating layer 412 between adjacent pixels needs to have a certain width, so that the aperture diameter of the pixels is greatly restricted. Therefore, the aperture ratio of the pixels may decrease.

An object of the present disclosure is to provide a display device capable of suppressing a leakage current while suppressing a decrease in the aperture ratio of pixels, and an electronic device including the display device.

In order to solve the above-mentioned problems, the first disclosure is
With multiple anodes separated for each pixel,
An insulating layer provided between adjacent anodes,
An organic layer commonly provided for multiple pixels, which covers multiple anodes and insulating layers,
With a cathode provided on the organic layer
The anode has a top surface provided at a position higher than the surface of the insulating layer and a side surface provided between the surfaces of the insulating layer.
The anode is a display device having at least one portion where the width of the side surface narrows from the top to the bottom of the anode.

In the first disclosure, the anode may have a second portion narrower than the first portion between the first portion having the widest width of the anode and the surface of the insulating layer. The first portion may be on the top of the anode or on the bottom side of the top of the anode. When the anode is viewed from a direction perpendicular to the display surface, the second portion may be located inside the first portion.

In the first disclosure, the anode may have a portion on the side surface that is narrower than the top surface.

In the first disclosure, the anode may have a tapered shape on at least a part of the side surface. The tapered shape may be inclined so that the width of the anode narrows from the top to the bottom of the anode.

In the first disclosure, the anode may have an overhang shape on the side surface.

In the first disclosure, the anode has a recess on the side surface, and at least a part of the recess may be provided at a position higher than the surface of the insulating layer.

In the first disclosure, the anode has a convex portion on the side surface, and this convex portion may be provided at a position higher than the surface of the insulating layer.

In the first disclosure, the organic layer may include a hole injection layer provided adjacent to the anode. In this case, the hole injection layer may be divided at the peripheral edge of each pixel.

In the first disclosure, the surface of the insulating layer may be flat.

In the first disclosure, the height h of the top surface of the anode with respect to the surface of the insulating layer and the thickness t of the organic layer may satisfy the relationship of h ≦ t.

In the first disclosure, the organic layer may be configured to emit white light. In this case, the display device may further include a color filter provided on the cathode.

The second disclosure is an electronic device including the display device of the first disclosure.

It is sectional drawing which shows the structure of the conventional display device. It is the schematic which shows an example of the whole structure of the display device which concerns on one Embodiment of this disclosure. It is sectional drawing which shows an example of the structure of the display device which concerns on one Embodiment of this disclosure. It is sectional drawing which shows the part of FIG. 3 enlarged. It is a top view which shows an example of the arrangement of a plurality of anodes. FIG. 3 is an enlarged cross-sectional view showing an example of the configuration of the organic layer shown in FIG. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is a process drawing for demonstrating an example of the manufacturing method of the display device which concerns on one Embodiment of this disclosure. It is sectional drawing which shows the modification of the display device. It is sectional drawing which shows the modification of the display device. It is sectional drawing which shows the modification of the display device. It is a top view which shows an example of the schematic structure of a module. It is a front view which shows an example of the appearance of a digital still camera. It is a rear view which shows an example of the appearance of a digital still camera. It is a perspective view of an example of the appearance of a head-mounted display. It is a perspective view which shows an example of the appearance of a television apparatus.

The embodiments of the present disclosure will be described in the following order. In all the drawings of the following embodiments, the same or corresponding parts are designated by the same reference numerals.
1 Display device configuration 2 Display device manufacturing method 3 Action effect 4 Modification example 5 Application example

[1 Display device configuration]
FIG. 2 is a schematic view showing an example of the overall configuration of the organic EL display device 10 (hereinafter, simply referred to as “display device 10”) according to the embodiment of the present disclosure. The display device 10 is suitable for use in various electronic devices, and has a display area 110A and a peripheral area 110B provided on the periphery of the display area 110A. A plurality of sub-pixels 100R, 100G, and 100B are arranged in a matrix in the display area 110A. The sub-pixel 100R displays red, the sub-pixel 100G displays green, and the sub-pixel 100B displays blue. In the following description, when the sub-pixels 100R, 100G, and 100B are not particularly distinguished, they are referred to as sub-pixel 100.

Columns of sub-pixels 100R, 100G, and 100B displaying the same color are arranged in the repeating row direction. Therefore, a combination of three sub-pixels 100R, 100G, and 100B arranged in the row direction constitutes one pixel. The peripheral region 110B is provided with a signal line drive circuit 111 and a scanning line drive circuit 112, which are drivers for displaying images.

The signal line drive circuit 111 supplies the signal voltage of the video signal corresponding to the luminance information supplied from the signal supply source (not shown) to the sub-pixel 100 selected via the signal line 111A. The scanning line drive circuit 112 is composed of a shift register or the like that sequentially shifts (transfers) the start pulse in synchronization with the input clock pulse. The scanning line drive circuit 112 scans the video signals in line units when writing the video signals to the sub-pixels 100, and sequentially supplies the scanning signals to the scanning lines 112A.

The display device 10 is, for example, a microdisplay in which self-luminous elements such as OLED or Micro-OLED are formed in an array. The display device 10 is suitable for use in a display device for VR (Virtual Reality), MR (Mixed Reality) or AR (Augmented Reality), an electronic viewfinder (EVF), a small projector, or the like. be.

FIG. 3 is a cross-sectional view showing an example of the configuration of the display device 10 according to the embodiment of the present disclosure. FIG. 4 is a cross-sectional view showing a part of FIG. 3 in an enlarged manner. The display device 10 is a top emission type display device, and includes a substrate (first substrate) 11 having one main surface, an insulating layer 12 provided on one main surface of the substrate 11, and a plurality of light emitting elements 13. , A protective layer 14 provided on a plurality of light emitting elements 13, a color filter 15 provided on the protective layer 14, a filling resin layer 16 provided on the color filter 15, and a filling resin layer 16 provided on the filling resin layer 16. The opposed substrate (second substrate) 17 is provided. The facing substrate 17 side is the top side, and the substrate 11 side is the bottom side.

(Light emitting element)
The plurality of light emitting elements 13 are arranged in a matrix on one main surface of the substrate 11. The light emitting element 13 is a white OLED or a white Micro-OLED (MOLED). As a colorization method in the display device 10, a method using a white OLED and a color filter 15 is used.

The light emitting element 13 has an anode 13A as a first electrode, an organic layer 13B, and a cathode 13C as a second electrode loaded in this order from the substrate 11 side.

(substrate)
The substrate 11 is a support that supports a plurality of light emitting elements 13 arranged on one main surface. Further, although not shown, the substrate 11 is provided with a drive circuit including a sampling transistor for controlling the drive of the plurality of light emitting elements 13 and a drive transistor, a power supply circuit for supplying electric power to the plurality of light emitting elements 13, and the like. You may be.

The substrate 11 may be made of, for example, glass or resin having low water and oxygen permeability, or may be made of a semiconductor such as a transistor which can be easily formed. Specifically, the substrate 11 is a glass substrate such as high-strain point glass, soda glass, borosilicate glass, forsterite, lead glass, or quartz glass, a semiconductor substrate such as amorphous silicon or polycrystalline silicon, or polymethyl. It may be a resin substrate such as methacrylate, polyvinyl alcohol, polyvinylphenol, polyether sulfone, polyimide, polycarbonate, polyethylene terephthalate, or polyethylene naphthalate.

(anode)
The anode 13A is electrically separated for each sub-pixel 100. The anode 13A is a top surface 13S1 provided at a position higher than the surface 12S of the insulating layer 12 (hereinafter, simply referred to as “the surface 12S of the insulating layer 12”) between the adjacent sub-pixels 100, that is, between the adjacent light emitting elements 13. And the side surface 13S2 provided between the surface 12S and the top surface 13S1 of the insulating layer 12. The top surface 13S1 is a film-forming surface on which the organic layer 13B is formed. The side surface 12S2 is a surface for dividing the hole injection layer 131 included in the organic layer 13B at the time of film formation.

The width of the side surface 13S2 of the anode 13A changes in the height direction of the anode 13A. The anode 13A has a portion on the side surface 13S2 that is narrower than the top surface 13S1. That is, the anode 13A has a portion (second portion) narrower than the widest apex of the anode 13A between the widest apex (first portion) of the anode 13A and the surface 12S of the insulating layer 12. Part). When the anode 13A is viewed from a direction perpendicular to the display surface, the portion narrower than the widest top of the anode 13A is located inside the widest top of the anode 13A. More specifically, the anode 13A has a tapered shape over the entire side surface 12S1. The tapered shape is inclined so that the width of the anode 13A narrows from the top to the bottom of the anode 13A. Since the side surface 13S2 of the anode 13A has the above-mentioned shape, the hole injection layer 131 can be divided at the peripheral edge of the sub-pixel 100 when the hole injection layer 131 is formed.

It is preferable that the height h of the top surface 13S1 of the anode 13A with respect to the surface 12S of the insulating layer 12 and the thickness t of the organic layer 13B satisfy the relationship of h ≦ t. This is because the recesses between the adjacent anodes 13A can be filled with the organic layer 13B, so that the cathode 13C can be suppressed from being divided at the peripheral edge of the sub-pixel 100.

The anode 13A also functions as a reflective layer, and it is preferable that the anode 13A is composed of a metal layer having a high reflectance and a large work function as much as possible in order to increase the luminous efficiency. The metal layer is, for example, chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), molybdenum (Mo), titanium (Ti), tantalum (Ta), aluminum (Al). , Magnesium (Mg), Iron (Fe), Tungsten (W), Silver (Ag) and other metal elements alone and alloys. Specific examples of the alloy include AlNi alloy and AlCu alloy. The anode 13A may be composed of a laminated film of a plurality of metal layers containing at least one of the above-mentioned simple substances of metal elements and alloys.

(Cathode)
The cathode 13C is provided as an electrode common to all sub-pixels 100 in the display area 110A. The cathode 13C is a transparent electrode having transparency to the light generated in the organic layer 13B. Here, it is assumed that the transparent electrode also includes a semitransparent reflective layer. The cathode 13C is composed of, for example, a metal or a metal oxide. The metal contains, for example, at least one of elemental substances and alloys of metal elements such as aluminum (Al), magnesium (Mg), calcium (Ca) and sodium (Na). Specific examples of the alloy include MgAg alloy, AlLi alloy and the like. The metal oxide contains, for example, at least one of a mixture of indium oxide and tin oxide (ITO), a mixture of indium oxide and zinc oxide (IZO) and zinc oxide (ZnO).

(Insulation layer)
FIG. 5 is a plan view showing an example of the arrangement of the plurality of anodes 13A. Note that FIG. 5 shows a state in which the insulating layer 12 and the plurality of anodes 13A are exposed. The insulating layer 12 is for electrically separating the anode 13A for each sub-pixel 100. The insulating layer 12 is provided between the adjacent anodes 13A. More specifically, the insulating layer 12 has a plurality of holes 12A, and each hole 12A is provided with an anode 13A. A part of the anode 13A on the bottom side of the anode 13A is provided in the hole portion 12A, and a part of the top side of the anode 13A protrudes from the surface 12S of the insulating layer 12. The surface 12S of the insulating layer 12 is preferably flat. Since the three-dimensional structure 424 (see FIG. 1) is not provided in the insulating layer 12 located between the adjacent anodes 13A, that is, between the adjacent sub-pixels 100, the opening diameter AD of the sub-pixels 100 is increased at the same pixel pitch P. can do.

The insulating layer 12 is made of, for example, an organic material or an inorganic material. The organic material includes, for example, at least one of polyimide and acrylic resin. Inorganic materials include, for example, at least one of silicon oxide, silicon nitride, silicon nitriding and aluminum oxide.

(Organic layer)
The organic layer 13B is provided as an organic layer common to all the sub-pixels 100 in the display area 110A. The organic layer 13B is configured to be capable of emitting white light. The organic layer 13B includes a hole injection layer 131 provided adjacent to the anode 13A. As described above, the hole injection layer 131 is divided by the side surface 13S2 at the peripheral edge of the sub-pixel 100. A non-deposited region R (see FIG. 4) of the hole injection layer 131 is formed around the sub-pixel 100.

FIG. 6 is an enlarged cross-sectional view of the organic layer 13B shown in FIG. The organic layer 13B has a structure in which the hole injection layer 131, the hole transport layer 132, the light emitting layer 133, and the electron transport layer 134 are laminated in this order from the anode 13A toward the cathode 13C. The configuration of the organic layer 13B is not limited to this, and layers other than the hole injection layer 131 and the light emitting layer 133 are provided as needed.

The hole injection layer 131 is a buffer layer for increasing the hole injection efficiency into the light emitting layer 133 and for suppressing leakage. The hole transport layer 132 is for increasing the hole transport efficiency to the light emitting layer 133. When an electric field is applied to the light emitting layer 133, recombination of electrons and holes occurs to generate light. The electron transport layer 134 is for increasing the electron transport efficiency to the light emitting layer 133. An electron injection layer (not shown) may be provided between the electron transport layer 134 and the cathode 13C. This electron injection layer is for increasing the electron injection efficiency.

(Protective layer)
The protective layer 14 is for blocking the light emitting element 13 from the outside air and suppressing the infiltration of moisture from the external environment into the light emitting element 13. Further, when the cathode 13C is composed of a metal layer, the protective layer 14 also has a function of suppressing oxidation of the metal layer.

The protective layer 14 is made of, for example, an inorganic material having low hygroscopicity. The inorganic material contains, for example, at least one of silicon oxide (SiO), silicon nitride (SiN), silicon nitride nitride (SiNO), titanium oxide (TIO) and aluminum oxide (AlO). The protective layer 14 may have a single-layer structure, but may have a multi-layer structure when the thickness is increased. This is to relieve the internal stress in the protective layer 14. The protective layer 14 may be made of a polymer resin. The polymer resin contains at least one of a thermosetting resin and an ultraviolet curable resin.

(Color filter)
The color filter 15 is, for example, an on-chip color filter (OCCF). The color filter 15 includes, for example, a red filter 15R, a green filter 15G, and a blue filter 15B. The red filter 15R, the green filter 15G, and the blue filter 15B are provided so as to face the light emitting element 13 of the sub pixel 100R, the light emitting element 13 of the sub pixel 100G, and the light emitting element 13 of the sub pixel 100B, respectively. As a result, the white light emitted from each of the light emitting elements 13 in the sub pixel 100R, the sub pixel 100G, and the sub pixel 100B passes through the red filter 15R, the green filter 15G, and the blue filter 15B, respectively, so that the red light is emitted. , Green light and blue light are emitted from the display surface, respectively. Further, a light-shielding layer (not shown) may be provided in the region between the

color filters

15R, 15G, and 15B of each color, that is, between the sub-pixels 100. The color filter 15 is not limited to the on-chip color filter, and may be provided on one main surface of the facing substrate 17.

(Filled resin layer)
The filled resin layer 16 has a function as an adhesive layer for adhering the color filter 15 and the facing substrate 17. The packed resin layer 16 contains, for example, at least one of a thermosetting resin and an ultraviolet curable resin.

(Opposite board)
The facing substrate 17 is provided so that one main surface of the facing substrate 17 and one main surface of the substrate 11 provided with a plurality of light emitting elements 13 face each other. The facing substrate 17 seals the light emitting element 13, the color filter 15, and the like together with the filled resin layer 16. The facing substrate 17 is made of a material such as glass that is transparent to each color light emitted from the color filter 15.

[2 Manufacturing method of display device]
Hereinafter, an example of a manufacturing method of the display device 10 according to the embodiment of the present disclosure will be described with reference to FIGS. 7A to 7H.

First, a drive circuit or the like is formed on one main surface of the substrate 11 by using, for example, a thin film forming technique, a photolithography technique, and an etching technique, and then an insulating layer 12 is formed on the drive circuit or the like. Next, as shown in FIG. 7A, a resist is applied onto the insulating layer 12 to form the resist layer 21. Next, as shown in FIG. 7B, the resist layer 21 is processed by, for example, photolithography to form a plurality of openings 21A.

Next, as shown in FIG. 7C, by etching the insulating layer 12 with the resist layer 21 as a mask, a plurality of holes 12A having a tapered shape on the side surface are formed on one main surface of the insulating layer 12. Here, the tapered shape is inclined so that the width of the hole portion 12A becomes narrower in the depth direction of the hole portion 12A. Next, after removing the resist layer 21, as shown in FIG. 7D, the first anode 13A1 and the second anode 13A2 are sequentially laminated by, for example, a sputtering method to form the anode 13A having a laminated structure. The first anode 13A1 is composed of, for example, Ti. The second anode 13A2 is made of, for example, an AlCu alloy.

Next, as shown in FIG. 7E, the anode 13A is flatly polished to the position of the opening of the hole 12A by, for example, CMP (Chemical Mechanical Polish), so that the anode 13A is separated into each light emitting element 13 (that is, every sub pixel 100). A plurality of anodes 13A are formed. Next, as shown in FIG. 7F, the insulating layer 12 is etched to make the top surface 13S1 of the anode 13A higher than the surface 12S of the insulating layer 12.

Next, as shown in FIG. 7G, the hole injection layer 131, the hole transport layer 132, the light emitting layer 133, and the electron transport layer 134 (see FIG. 6) are placed on the anode 13A and the insulating layer 12 by, for example, a vapor deposition method. The organic layer 13B is formed by laminating in this order. At this time, the organic layer 13B is divided at the peripheral edge of each sub-pixel 100 by the tapered shape of the side surface 13S2 of the anode 13A. Next, as shown in FIG. 7H, the cathode 13C is formed on the organic layer 13B by, for example, a sputtering method. As a result, a plurality of light emitting elements 13 are formed on one main surface of the substrate 11.

Next, the protective layer 14 is formed on the cathode 13C by, for example, a vapor deposition method or a CVD method, and then the color filter 15 is formed on the protective layer 14. In addition, in order to flatten the step of the protective layer 14 and the step due to the difference in film thickness of the color filter 15 itself, the flattening layer may be formed on both the upper, lower or upper and lower sides of the color filter 15. Next, for example, the color filter 15 is covered with the filling resin layer 16 by the ODF (One Drop Fill) method, and then the facing substrate 17 is placed on the filling resin layer 16. Next, for example, by applying heat to the filling resin layer 16 or irradiating the filling resin layer 16 with ultraviolet rays to cure the filling resin layer 16, the substrate 11 and the facing substrate 17 are separated from each other via the filling resin layer 16. Paste together. As a result, the display device 10 is sealed. When the filled resin layer 16 contains both a thermosetting resin and an ultraviolet curable resin, the filled resin layer 16 is irradiated with ultraviolet rays to be temporarily cured, and then heat is applied to the filled resin layer 16 to perform main curing. You may let it.

[3 Action effect]
As described above, in the display device 10 according to the embodiment, the anode 13A has a tapered shape on the side surface 13S2. This tapered shape is inclined so that the width of the anode 13A narrows from the top to the bottom of the anode 13A. As a result, in the film forming step of the hole injection layer 131, the hole injection layer 131 can be divided by the side surface 12S2 at the peripheral surface portion of each sub-pixel 100. Further, the insulating layer 12 between the adjacent sub-pixels 100 only needs to have a function of ensuring the insulating property between the adjacent anodes 13A, and the conventional three-dimensional structure 424 (see FIG. 1) or the like is not required. The aperture diameter AD of the sub-pixel 100 can be increased at the same pixel pitch P. Therefore, at the same pixel pitch P, it is possible to improve the brightness and extend the life. In addition, high definition can be realized with the same pixel shape.

Since the distance between the anodes 13A on the surface 12S of the insulating layer 12 can be made larger than the distance between the ends of the adjacent anodes 13A, the insulating layer 12 secures the insulating property between the adjacent sub-pixels 100. , The distance between the ends of the anode 13A can be reduced.

[4 Modification example]
(Modification example 1)
In one embodiment described above, an example in which the anode 13A has a tapered shape on the entire side surface 12S1 (see FIG. 4) has been described, but as shown in FIG. 8, a part of the side surface 12S1 has a tapered shape. You may. FIG. 8 shows an example in which the anode 13A has a tapered shape in the region from the upper end of the side surface 12S1 (one end on the top surface 13S1 side) to the specified position on the bottom side, but is on the bottom side of the upper end side of the side surface 12S1. The region from the first specified position to the second specified position on the bottom side may have a tapered shape. However, the first defined position is set higher than the surface 12S of the insulating layer 12.

(Modification 2)
In one embodiment described above, an example in which the anode 13A has a tapered shape on the side surface 12S1 (see FIG. 4) has been described, but as shown in FIG. 9, even if the side surface 12S1 has a recess 13A3 as a part of the side surface 12S1. good. That is, the anode 13A may have an overhang shape on the side surface 12S1. At least a part of the recess 13A3 is provided at a position higher than the surface 12S of the insulating layer 12. That is, the entire recess 13A3 may be provided at a position higher than the surface 12S of the insulating layer 12, or a part of the recess 13A3 may be provided at a position higher than the surface 12S of the insulating layer 12. The recess 12A1 extends in the circumferential direction of the side surface 13S2. The recess 12A1 may have a closed loop shape. Although FIG. 9 shows an example in which the cross-sectional shape of the recess 13A3 is substantially U-shaped, it may be substantially V-shaped, substantially arc-shaped, substantially elliptical arc-shaped, substantially parabolic-shaped, or the like. Here, the cross-sectional shape of the recess 13A3 means the cross-sectional shape when the recess 13A3 is cut in the direction perpendicular to the display surface.

(Modification example 3)
In one embodiment described above, an example in which the anode 13A has a tapered shape on the side surface 12S1 (see FIG. 4) has been described, but as shown in FIG. 10, a convex portion 13A4 may be provided on the side surface 13S2. That is, the anode 13A may have an overhang shape on the side surface 12S1. The convex portion 13A4 is provided at a position higher than the surface 12S of the insulating layer 12. The convex portion 13A4 extends in the circumferential direction of the side surface 13S2. The convex portion 13A4 may have a closed loop shape. Although FIG. 10 shows an example in which the cross-sectional shape of the convex portion 13A4 is substantially U-shaped, it may be substantially V-shaped, substantially arc-shaped, substantially elliptical arc-shaped, substantially parabolic-shaped, or the like. Here, the cross-sectional shape of the convex portion 13A4 means the cross-sectional shape when the convex portion 13A4 is cut in the direction perpendicular to the display surface. The width of the anode 13A on the bottom side of the convex portion 13A4 is preferably narrower than the width of the anode 13A on the upper side of the convex portion 13A4.

[5 Application example]
(Electronics)
The display device 10 according to any one of the above-described embodiment and its modification is incorporated into various electronic devices as, for example, a module as shown in FIG. In particular, it is suitable for those that require high resolution such as an electronic viewfinder or a head-mounted display of a video camera or a single-lens reflex camera, and are used by enlarging them near the eyes. This module has an exposed region 210 on one short side of the substrate 11 that is not covered by an opposing substrate or the like, and the wiring of the signal line drive circuit 111 and the scanning line drive circuit 112 is extended to this region 210. An external connection terminal (not shown) is formed. A flexible printed circuit board (FPC) 220 for signal input / output may be connected to the external connection terminal.

(Specific example 1)
12A and 12B 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 shooting lens unit (interchangeable lens) 312 in the center of the front of the camera body (camera body) 311 and on the left side of the front. It has a grip portion 313 for the photographer to grip.

A monitor 314 is provided at a position shifted to the left from the center of the back of the camera body 311. An electronic viewfinder (eyepiece window) 315 is provided above the monitor 314. By looking into the electronic viewfinder 315, the photographer can visually recognize the light image of the subject guided by the photographing lens unit 312 and determine the composition. As the electronic viewfinder 315, the display device 10 according to any one of the above-described embodiment and its modification can be used.

(Specific example 2)
FIG. 13 shows an example of the appearance of the head-mounted display 320. The head-mounted display 320 has, for example, ear hooks 322 for being worn on the user's head on both sides of the eyeglass-shaped display unit 321. As the display unit 321, the display device 10 according to any one of the above-described embodiment and its modification can be used.

(Specific example 3)
FIG. 14 shows an example of the appearance of the television device 330. The television device 330 has, for example, a video display screen unit 331 including a front panel 332 and a filter glass 333, and the video display screen unit 331 is a display according to any one of the above-described embodiments and modifications thereof. It is composed of a device 10.

Although one embodiment and modification of the present disclosure have been specifically described above, the present disclosure is not limited to the above-mentioned embodiment and modification, and various modifications based on the technical idea of the present disclosure. Is possible.

For example, the configurations, methods, processes, shapes, materials, numerical values, etc. given in the above-described embodiment and modification are merely examples, and different configurations, methods, processes, shapes, materials, and numerical values may be used as necessary. Etc. may be used.

The configurations, methods, processes, shapes, materials, numerical values, etc. of the above-described embodiment and modification can be combined with each other as long as they do not deviate from the gist of the present disclosure.

Unless otherwise specified, the materials exemplified in the above-described embodiment and modification can be used alone or in combination of two or more.

The present disclosure may also adopt the following configuration.
(1)
With multiple anodes separated for each pixel,
An insulating layer provided between the adjacent anodes and
An organic layer commonly provided for the plurality of pixels, which covers the plurality of anodes and the insulating layer,
It is provided with a cathode provided on the organic layer.
The anode has a top surface provided at a position higher than the surface of the insulating layer and a side surface provided between the surface of the insulating layer and the top surface.
The anode is a display device having at least one portion in which the width of the side surface is narrowed from the top to the bottom of the anode.
(2)
The display device according to (1), wherein the anode has a second portion narrower than the first portion between a first portion having the widest width of the anode and a surface of the insulating layer. ..
(3)
The display device according to (2), wherein the second portion is located inside the first portion.
(4)
The display device according to (1), wherein the anode has a portion on the side surface whose width is narrower than that of the top surface.
(5)
The anode has a tapered shape on at least a part of the side surface.
The display device according to any one of (1) to (4), wherein the tapered shape is inclined so that the width of the anode is narrowed from the top to the bottom of the anode.
(6)
The display device according to any one of (1) to (5), wherein the anode has an overhang shape on the side surface.
(7)
The anode has a recess on the side surface.
The display device according to any one of (1) to (6), wherein at least a part of the recess is provided at a position higher than the surface of the insulating layer.
(8)
The anode has a protrusion on the side surface and has a convex portion.
The display device according to any one of (1) to (7), wherein the convex portion is provided at a position higher than the surface of the insulating layer.
(9)
The display device according to any one of (1) to (8), wherein the organic layer includes a hole injection layer provided adjacent to the anode.
(10)
The display device according to (9), wherein the hole injection layer is divided at a peripheral portion of each of the pixels.
(11)
The display device according to any one of (1) to (10), wherein the surface of the insulating layer is flat.
(12)
The display according to any one of (1) to (11), wherein the height h of the top surface of the anode with respect to the surface of the insulating layer and the thickness t of the organic layer satisfy the relationship of h ≦ t. Device.
(13)
The organic layer is configured to be capable of emitting white light.
The display device according to any one of (1) to (12), further comprising a color filter provided on the cathode.
(14)
An electronic device including the display device according to any one of (1) to (13).

10 Display device 11 Substrate 12 Insulation layer 12A Hole 12S Surface 13 Light emitting element 13A Anode 13A1 First anode 13A2 Second anode 13A3 Concave 13A4 Convex 13B Organic layer 13C Cathode 13S1 Top surface 13S2 Side surface 14 Protective layer 15 Red filter

15G Green filter

15B Blue filter 16 Filled resin layer 17 Opposing substrate 21 Resist

layer 21A Opening

100R, 100G, 100B Subpixel 110A Display area 110B Peripheral area 111 Signal line drive circuit 111A Signal line 112 Scan line drive circuit 112A Scan line 131 Hole injection layer 132 Hole transport layer 133 Organic light emitting layer 134 Electron transport layer 310 Digital still camera (electronic equipment)
320 Head-mounted display (electronic device)
330 Television equipment (electronic equipment)
AD Aperture diameter P Pixel pitch h Height of top surface 13S1 t Thickness of organic layer 13B

Claims

With multiple anodes separated for each pixel,
An insulating layer provided between the adjacent anodes and
An organic layer commonly provided for the plurality of pixels, which covers the plurality of anodes and the insulating layer,
It is provided with a cathode provided on the organic layer.
The anode has a top surface provided at a position higher than the surface of the insulating layer and a side surface provided between the surface of the insulating layer and the top surface.
The anode is a display device having at least one portion in which the width of the side surface is narrowed from the top to the bottom of the anode.
The display device according to claim 1, wherein the anode has a second portion narrower than the first portion between a first portion having the widest width of the anode and a surface of the insulating layer. ..
The display device according to claim 2, wherein the second part is located inside the first part.
The display device according to claim 1, wherein the anode has a portion on the side surface whose width is narrower than that of the top surface.
The anode has a tapered shape on at least a part of the side surface.
The display device according to claim 1, wherein the tapered shape is inclined so that the width of the anode is narrowed from the top to the bottom of the anode.
The display device according to claim 1, wherein the anode has an overhang shape on the side surface.
The anode has a recess on the side surface.
The display device according to claim 1, wherein at least a part of the recess is provided at a position higher than the surface of the insulating layer.
The anode has a protrusion on the side surface and has a convex portion.
The display device according to claim 1, wherein the convex portion is provided at a position higher than the surface of the insulating layer.
The display device according to claim 1, wherein the organic layer includes a hole injection layer provided adjacent to the anode.
The display device according to claim 9, wherein the hole injection layer is divided at a peripheral portion of each of the pixels.
The display device according to claim 1, wherein the surface of the insulating layer is flat.
The display device according to claim 1, wherein the height h of the top surface of the anode with respect to the surface of the insulating layer and the thickness t of the organic layer satisfy the relationship of h ≦ t.
The organic layer is configured to be capable of emitting white light.
The display device according to claim 1, further comprising a color filter provided on the cathode.
An electronic device including the display device according to claim 1.