Display device and electronic apparatus

Abstract

Provided are a display device and an electronic apparatus, the display device being capable of suppressing moisture permeation into a display area and improving coating properties and adhesion of a functional layer when the functional layer or a sealing substrate is disposed on a protective layer. The display device has, in order on a substrate: a light-emitting element substrate on which an inorganic insulating layer and a light-emitting element are formed; and a protective layer for covering the upper surface side of the light emitting element substrate, and including a planarization layer and a functional layer different from the planarization layer over the protective layer. The inorganic insulating layer has at least one of a groove and a stepped portion, and the protective layer has a covering portion covering at least a portion of the groove or the stepped portion.

Description

Technical Field

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

[0002] A display device using a light-emitting element such as an organic EL element needs to suppress moisture from entering the light-emitting element provided in the display area. For example, the moisture entry path indicates a path through a protective layer provided on a substrate. Patent document 1 discloses a technology that extends the moisture entry path of a passivation film used as a protective layer provided on a substrate by directly providing a concave portion or a convex portion on the substrate to surround a display panel.

[0003] Reference List

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2006-120635 Summary of the invention

[0006] Problems to be solved by the present invention

[0007] In the technology of Patent Document 1, since projections and depressions are easily formed on the surface of the protective layer, when the functional layer or the sealing substrate is disposed on the upper side of the protective layer, there is room for improvement in improving the coating characteristics and adhesion of the functional layer (such as a color filter or a sealing substrate).

[0008] The present disclosure is made in view of the above points, and an object of the present disclosure is to provide a display device and electronic device that can suppress moisture from entering a display area and improve coating characteristics and adhesion of a functional layer or a sealing substrate when the functional layer or the sealing substrate is disposed on a protective layer.

[0009] Solution to the problem

[0010] The present disclosure is, for example: (1) a display device, comprising:

[0011] A light emitting element substrate, wherein an inorganic insulating layer and a light emitting element are sequentially formed on the substrate; and

[0012] A protective layer covers the upper surface side of the light emitting element substrate, wherein

[0013] The protective layer is provided with a planarization layer and a functional layer different from the planarization layer on an upper side of the protective layer, the inorganic insulating layer has at least one of a groove and a step, and

[0014] The protection layer includes a covering portion covering at least a portion of the groove or the step.

[0015] The present disclosure may be: (2) an electronic device including the display device according to the above (1). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A is a plan view for explaining an example of a display device. Figure 1 B is magnified Figure 1 A is a partially enlarged plan view of a portion of a region XS surrounded by a dotted line in FIG. Figure 1 C is a schematic diagram showing the Figure 1 A cross-sectional view of a state of a longitudinal cross section taken along line AA of A.

[0017] Figure 2 is a cross-sectional view for explaining an example of the display device according to the first embodiment.

[0018] Figure 3 A. Figure 3 B. Figure 3 C and Figure 3 D is a cross-sectional view illustrating an example of a method of manufacturing a display device.

[0019] Figure 4 A and Figure 4 B is a cross-sectional view illustrating an example of a method of manufacturing a display device.

[0020] Figure 5 is a cross-sectional view for explaining an example of a display device according to a modification example of the first embodiment.

[0021] Figure 6 is a plan view for explaining an example of the display device according to the first embodiment.

[0022] Figure 7 is a cross-sectional view for explaining an example of a display device according to the second embodiment.

[0023] Figure 8 is a cross-sectional view for explaining an example of a display device according to a third embodiment.

[0024] Fig. 9 is a cross-sectional view for explaining an example of a display device according to a fourth embodiment.

[0025] Fig.10 is a cross-sectional view for explaining an example of a display device according to a fifth embodiment.

[0026] Fig.11 is a plan view of a display device according to a sixth embodiment.

[0027] Fig.12 is a cross-sectional view for explaining an example of a display device according to a sixth embodiment.

[0028] Fig.13 is a cross-sectional view for explaining an example of a display device according to a seventh embodiment.

[0029] Fig.14 is a cross-sectional view for explaining an example of a display device according to an eighth embodiment.

[0030] Fig.15 is a cross-sectional view for explaining an example of a display device according to a ninth embodiment.

[0031] Fig.16 is a cross-sectional view for explaining an example of a display device according to a tenth embodiment.

[0032] Fig.17 is a cross-sectional view for explaining an example of a display device according to an eleventh embodiment.

[0033] Fig.18 A and Fig.18 B is a diagram for explaining an example of a display device having a resonator structure.

[0034] Fig.19 A and Fig.19 B is a diagram for explaining an example of a display device having a resonator structure.

[0035] Fig. 20 A and Fig. 20 B is a diagram for explaining an example of a display device having a resonator structure.

[0036] Fig.21 is a diagram for explaining an example of a display device having a resonator structure.

[0037] Fig. 22 A. Fig. 22 B and Fig. 22 C is a diagram for explaining an example in the case where the display device includes a wavelength selection unit.

[0038] Fig.23 : is a diagram for explaining an example in the case where the display device includes a wavelength selection unit.

[0039] Fig.24 A and Fig.24 B is a diagram for explaining an example in the case where the display device includes a wavelength selection unit.

[0040] Fig.25 is a diagram for explaining an example in the case where the display device includes a wavelength selection unit.

[0041] Fig.26 A and Fig.26 B is a diagram for explaining an application example of the display device.

[0042] Fig. 27is a diagram for explaining an application example of the display device.

[0043] Fig.28 is a diagram for explaining an application example of the display device.

[0044] Fig.29 is a diagram for explaining an application example of the display device.

[0045] Fig.30 is a diagram for explaining an application example of the display device.

[0046] Fig.31 A and Fig.31 B is a diagram for explaining an application example of the display device. DETAILED DESCRIPTION

[0047] Hereinafter, examples and the like according to the present disclosure will be described with reference to the drawings. Note that the description will be given in the following order. In this specification and the drawings, configurations having substantially the same functional configuration are denoted by the same reference symbols, and redundant descriptions are omitted.

[0048] Note that the description will be given in the following order.

[0049] 1. First Implementation

[0050] 2. Second Implementation

[0051] 3. Third Implementation

[0052] 4. Fourth Implementation

[0053] 5. Fifth Implementation

[0054] 6. Sixth Implementation

[0055] 7. Seventh Implementation Method

[0056] 8. Eighth Implementation

[0057] 9. Ninth Implementation Method

[0058] 10. Tenth Implementation Method

[0059] 11. Eleventh Implementation Method

[0060] 12. Example of a display device having a resonator structure

[0061] 13. Example of Positional Relationship in a Case Where a Display Device Includes a Wavelength Selection Unit

[0062] 14. Application Examples

[0063] The following description is a preferred specific embodiment of the present disclosure, and the content of the present disclosure is not limited to these embodiments, etc. In addition, in the following description, for the convenience of explanation, directions such as forward and backward, right and left, and upward and downward directions are used, but the content of the present disclosure is not limited to these directions. Figure 1 A. Figure 1 B. Figure 1 C and Figure 2 In the example of , the Z-axis direction is defined as the up-down direction (the upper side is in the +Z direction, and the lower side is in the -Z direction), the X-axis direction is defined as the front-back direction (the front side is in the +X direction, and the back side is in the -X direction), and the Y-axis direction is defined as the left-right direction (the right side is in the +Y direction, and the left side is in the -Y direction), and description will be made based on this. Similarity applies to Figures 3 to 21 For convenience, the Figure 1 The relative size ratios of the size and thickness of each layer shown in each of the A and other figures are not limited to any actual size ratio. Regarding the definitions and size ratios of these directions, this similarity applies to Figure 1 B and Figure 1 C and Figures 2 to 17 Attached pictures.

[0064] [1 First Embodiment]

[0065] [1-1 Configuration]

[0066] Examples of display devices according to embodiments of the present disclosure include organic electroluminescent (EL) display devices. Figure 1 A. Figure 1 B and Figure 1 As shown in FIG. 3C, a case where the display device is an organic EL display device (hereinafter, simply referred to as “display device 10”) will be described as an example. Figure 1 A is a plan view showing an example of the display device 10 . Figure 1 B is used to illustrate Figure 1 A is a diagram of the layout of sub-pixels in a portion of the region XS. Figure 1 C is a schematic diagram showing the Figure 1 A cross-sectional view of a state of a longitudinal section taken along line AA of A.

[0067] (display area and external area)

[0068] In the display device 10, a display area 10A and an outer area 10B are defined on the display surface D side. The display area 10A is an area determined to emit light generated by the plurality of light emitting elements 104. The outer area 10B is determined as an area outside the outer edge of the display area 10A. Figure 1In the example of A, the display area 10A is formed as a rectangular area. The area defined as a rectangular ring area outside the display area 10A is the outer area 10B. The position of the outer edge of the display area 10A is the position of the inner edge of the outer area 10B, and the display area 10A and the outer area 10B are in contact with each other at the boundary. Note that Figure 1 The display surface D shown in A represents a surface where light generated from the light emitting element 104 is extracted to the outside in the display device 10 .

[0069] In the following description, the case where the display device 10 performs display by the top emission method is explained as an example. The top emission method refers to a method in which the light emitting element 104 is arranged on the light emitting surface side rather than the substrate 11 side. Therefore, in the display device 10, the substrate 11 is located on the rear surface side of the display device 10, and the direction (+Z direction) from the substrate 11 toward the light emitting element 104 described later is the direction toward the front surface side (upper surface side) of the display device 10. In the display device 10, the light generated from the light emitting element 104 is directed to the +Z direction and emitted to the outside. In the following description, in each layer constituting the display device 10, the surface on the display surface side in the display area (display area 10A) of the display device 10 will be referred to as the first surface (upper surface), and the surface on the rear surface side of the display device 10 will be referred to as the second surface (lower surface). Note that this does not exclude the case where the display device 10 according to the present disclosure is a bottom emission method. The display device 10 can also be applied to the bottom emission method. By the bottom emission method, the light generated from the light emitting element 104 is directed to the -Z direction and emitted to the outside.

[0070] (Sub-pixel type)

[0071] exist Figure 1 A. Figure 1 B. Figure 1 C, etc., three colors of red, green, and blue are determined as a plurality of color types corresponding to a plurality of emission colors of the display device 10, and three types of sub-pixels 101R, 101G, and 101B are set as sub-pixels. Sub-pixel 101R, sub-pixel 101G, and sub-pixel 101B are red sub-pixels, green sub-pixels, and blue sub-pixels, respectively, and display red, green, and blue, respectively. However, Figure 1The example of is taken as an example, and the display device 10 is not limited to the case where a plurality of sub-pixels corresponding to three color types are included. In addition, the wavelengths of light corresponding to the respective color types of red, green, and blue can be determined as, for example, wavelengths in the range of 610nm to 650nm (red wavelength band), the range of 510nm to 590nm (green wavelength band), and the range of 440nm to 480nm (blue wavelength band), respectively. Note that the number of color types of sub-pixels is not limited to the three colors shown here, but may be two colors, four colors, etc. In addition, the color types of sub-pixels are not limited to red, green, and blue, but may be yellow, white, etc.

[0072] In addition, the layout of the sub-pixels 101B, 101R, and 101G in the display device 10 is not particularly limited, but Figure 1 In the example of FIG. 1 , in a predetermined area constituting a display surface, sub-pixels 101B, 101R, and 101G constituting one pixel are arranged in a stripe shape, and each pixel is set two-dimensionally. Figure 1 In the display device 10 shown in the example of , a plurality of sub-pixels 101B, 101R, and 101G corresponding to a plurality of color types are arranged in a two-dimensional and stripe layout. Note that Figure 1 B is an example, and as will be described later, the layout of the sub-pixels 101B, 101R, and 101G is not limited in the present disclosure. Figure 1 Example A is a diagram for explaining a display area 10A of the display device 10 .

[0073] In the description of this specification, the sub-pixels 101R, 101G, and 101B are collectively referred to as sub-pixels 101 without particularly distinguishing the types of the sub-pixels 101R, 101G, and 101B.

[0074] (Sub-pixel driving)

[0075] The display device 10 generally includes a control circuit (not shown), an H driver and a V driver (not shown), and the control circuit controls the driving of the H driver and the V driver. In the case where a two-dimensional matrix is ​​allocated to each sub-pixel 101, the H driver and the V driver control the driving of the sub-pixel 101 in units of columns and rows, respectively.

[0076] (Light-emitting element substrate)

[0077] exist Figure 1 In example C, the display device 10 includes a light emitting element substrate 103. In the light emitting element substrate 103, an inorganic insulating layer 12 and a light emitting element 104 are formed on a substrate 11. Here, as described later, the light emitting element 104 has a structure in which a first electrode 13, an organic layer 14, and a second electrode 15 are sequentially stacked.

[0078] (Substrate)

[0079] The substrate 11 may include glass or resin having low moisture and oxygen permeability, or may contain a semiconductor in which a transistor or the like is easily formed. Specifically, the substrate 11 may be a glass substrate, a semiconductor substrate, a resin substrate, or the like.

[0080] like Figure 1 C and Figure 2 As shown, the inorganic insulating layer 12 is provided on the substrate 11, and various circuits for driving the plurality of light-emitting elements 104 are provided in the inorganic insulating layer 12. Examples of the various circuits include a driving circuit for controlling the driving of the light-emitting element 104, and a power supply circuit for supplying power to the plurality of light-emitting elements 104 (both not shown in the drawings). The various circuits are restricted from being exposed to the outside by the inorganic insulating layer 12. In addition, the substrate 11 is provided with wiring 110 for connecting the light-emitting element 104, the circuit provided on the substrate 11, etc. to the first electrode 13, etc. Examples of the wiring 110 include a plurality of contact plugs.

[0081] (Inorganic insulating layer)

[0082] The inorganic insulating layer 12 includes, for example, an organic material or an inorganic material. The organic material includes, for example, at least one of polyimide and acrylic resin. The inorganic material includes, for example, at least one of silicon oxide, silicon nitride, silicon oxynitride, or aluminum oxide.

[0083] (groove or step)

[0084] The inorganic insulating layer 12 has a groove or a step. The groove or the step forms a height difference portion (a portion forming a position difference in the height direction) (in Figure 2 In the embodiment, the first height difference portion 133). Figure 1 A and Figure 2 As shown, in the case where the thickness direction (Z-axis direction) of the light emitting element substrate 103 is the line of sight direction, the inorganic insulating layer 12 has a groove or a step at a position corresponding to the outer region 10B. Figure 2 In the example of , the inorganic insulating layer has a groove 27A. The layout of the groove 27A is not particularly limited, but the groove 27A is preferably formed in a ring shape surrounding the display area 10A. Figure 1 A and Figure 2 In the example shown in FIG. 2 , the groove 27A is formed in a rectangular ring shape.

[0085] (Groove)

[0086] As described above, in the case where the thickness direction (Z-axis direction) of the light emitting element substrate 103 is the line of sight direction (in the plan view of the display device 10), the groove 27A is formed at a position outside the display region 10A. In addition, the groove 27A has a wall portion 127 and a bottom surface 128, and is preferably formed at a lower position of the end portion 41 of the sealing substrate 22 or closer to the display region 10A side than its lower position ( Figure 2 In the case where the Z-axis direction is the line of sight direction, at least a portion of the bottom surface 128 of the groove 27A is preferably formed in a region corresponding to a portion between an end surface 41A (a distal end 40B of the inclined portion 40) of the end portion 41 of the sealing substrate 22 in a plan view of the display device 10 and a proximal end 40A of the inclined portion 40 described later. In this case, when manufacturing the display device 10, as shown in FIG. Figure 2 As shown, it is easy to form the covering portion 160 so as to contact with the wall portion 127 of the groove 27A and cover the first wall portion 127A, and fill the portion 129A of the groove inner space 129 other than the covering portion 160 with the end surface coating portion 42 etc. In addition, the groove inner space 129 refers to the space portion surrounded by the wall portion 127 (the first wall portion 127A and the second wall portion 127B) and the bottom surface 128 of the groove 27A.

[0087] exist Figure 1 In the example of A, the groove 27A is formed in a rectangular annular shape, but this is an example, and the groove is not limited to the rectangular annular shape, and may be an annular shape, an elliptical annular shape, or the like.

[0088] (Cross-sectional shape of groove)

[0089] The cross-sectional shape of the groove 27A is not particularly limited and may be as follows: Figure 2 The examples include a non-tapered shape, a tapered shape, or an inverted tapered shape.

[0090] (Groove Width)

[0091] As long as the width of the groove 27A is at least large enough to allow the protective layer 16 described later to be formed on the inorganic insulating layer 12, a height difference structure ( Figure 2 The width of the groove 27A is not particularly limited if the size of the second height difference portion 134 is greater than that of the second height difference portion 134. The height difference structure of the second height difference portion 134 may be exemplified as a concave structure or a step structure. In addition, when the height difference structure of the second height difference portion 134 is formed, the moisture entry path may be extended along the inside of the protective layer 16. From the viewpoint of forming the height difference structure, the width of the groove 27A is preferably greater than the thickness of the protective layer 16. In particular, in Figure 2In the example, since a portion of the wall portion 127 and the bottom surface 128 of the groove 27A contacts and covers the first protective layer 16A, the width Wd1 of the groove 27A is preferably greater than the thickness Wm of the first protective layer 16A.

[0092] (Depth of groove)

[0093] The depth of the groove 27A is set so that when the protective layer 16 described later is formed on the inorganic insulating layer 12, a height difference structure corresponding to the groove 27A can be formed on the upper surface side of the cover portion 160 of the protective layer 16. From this point of view, the depth of the groove 27A is preferably greater than the thickness of the protective layer 16. Specifically, Figure 2 In the example of FIG. 1 , because a portion of the bottom surface 128 of the groove 27A contacts the first protective layer 16A and covers the bottom surface 128 , the depth Wd2 of the groove 27A is preferably greater than the thickness Wm of the first protective layer 16A.

[0094] (Number of grooves or steps)

[0095] exist Figure 2 In the examples of FIG. 1 , one groove 27A is formed as a groove or a step, but two or more grooves or steps may be provided. Figure 6 As shown, a plurality of grooves 27A may be annularly formed in the outer region 10B to surround the display region 10A. Figure 6 1 is a plan view for explaining an example in which a plurality of grooves or steps are formed. Figure 6 As shown, in the case where two or more grooves 27A are formed in the inward and outward directions, the position of the groove 27A is not particularly limited as long as it is the outer region 10B. For example, the groove 27A is formed so that the proximal end 40A of the inclined portion 40 is positioned on the bottom surface 128 of the outermost groove 27A, and the groove 27A on the inner side of the outermost groove 27A is formed at a predetermined position closer to the display region 10A side than the proximal end 40A of the inclined portion 40 in the outer region 10B. In addition, the combination of the groove or the step may be a combination of the groove 27A and the step 27B, as described in the modified example of the first embodiment described later, so as to surround the display region 10A.

[0096] (Light-emitting element)

[0097] A plurality of light emitting elements 104 are disposed on the first surface of the inorganic insulating layer 12. Figure 1 , Figure 2In the examples of , the light-emitting element 104 is an organic electroluminescent element (organic EL element). As a plurality of light-emitting elements 104, a light-emitting element is provided that sets the color corresponding to the color type of the sub-pixel 101 as the light emitted from the light-emitting surface (such as the light-emitting color). For example, the light-emitting elements 104R, 104G, and 104B are formed in the sub-pixels 101R, 101G, and 101B, respectively. In addition, the plurality of light-emitting elements 104 are arranged in a layout corresponding to the arrangement of the sub-pixels 101 of the corresponding color types. Note that in this specification, the term light-emitting element 104 is used without particularly distinguishing the types such as the light-emitting elements 104R, 104G, and 104B.

[0098] Each light emitting element 104 has a multilayer structure in which a first electrode 13, an organic layer 14 and a second electrode 15 are sequentially stacked. The first electrode 13, the organic layer 14 and the second electrode 15 are sequentially stacked from one side of the substrate 11 in a direction (+Z direction) from the second surface toward the first surface.

[0099] (First Electrode)

[0100] A plurality of first electrodes 13 are provided on the first surface side of the substrate 11. Figure 2 In the example, the first electrode 13 is an anode electrode.

[0101] Each of the first electrodes 13 includes at least one of a metal layer or a metal oxide layer. Each of the first electrodes 13 may include a single-layer film of a metal layer or a metal oxide layer, or a multi-layer film of a metal layer and a metal oxide layer.

[0102] The metal layer contains at least one metal element selected from the group consisting of, 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) and silver (Ag). The metal layer may contain at least one of the above metal elements as a constituent element of an alloy. Specific examples of alloys include aluminum alloys and silver alloys. Specific examples of aluminum alloys include, for example, AlNd and AlCu.

[0103] The metal oxide layer includes, for example, at least one of a mixture of indium oxide and tin oxide (ITO), a mixture of indium oxide and zinc oxide (IZO), or titanium oxide (TiO).

[0104] exist Figure 1 C and Figure 2 In the embodiment, the first electrodes 13 are electrically isolated for each sub-pixel 101 . That is, a plurality of first electrodes 13 are provided on the first surface side of the substrate 11 , and are provided for each sub-pixel 101 .

[0105] In addition, it is preferable to form an insulating layer between adjacent first electrodes 13. Figure 1 C and Figure 2 In the example of , the inorganic insulating layer 12 is formed between adjacent first electrodes 13. Figure 1 C. Figure 2 In other examples, the inorganic insulating layer 12 electrically isolates each first electrode 13 for each light emitting element 104 (ie, for each sub-pixel 101). Figure 1 As shown in FIG. 3 , an opening 12A is formed on the first surface side of the inorganic insulating layer 12, and the first surface of the first electrode 13 (the surface facing the second electrode 15) is exposed through the opening 12A of the inorganic insulating layer 12, and the portion of the first electrode 13 exposed through the opening 12A faces the organic layer 14 described later, while avoiding the insertion of the inorganic insulating layer 12. Note that the inorganic insulating layer 12 can be formed not only between adjacent first electrodes 13, but also on the edge portion of the first electrode 13. The edge portion of each first electrode 13 is defined by a portion from the outer periphery of the first electrode 13 to a predetermined position close to the center side of the first electrode 13. In this case, the inorganic insulating layer 12 also has an opening 12A, and the first surface of the first electrode 13 is exposed through the opening 12A.

[0106] (Light-emitting element)

[0107] In the display device 10, a plurality of light emitting elements 104 are provided on the upper side of the first surface of the substrate 11. Figure 1 In the example of C, as a plurality of light emitting elements 104, respective light emitting elements 104R, 104G, and 104B are formed to correspond to respective sub-pixels 101R, 101G, and 101B. In this specification, the term light emitting element 104 is used without particularly distinguishing the types such as the light emitting elements 104R, 104G, and 104B. The plurality of light emitting elements 104 are two-dimensionally arranged in a stripe-like arrangement pattern.

[0108] (Organic layer)

[0109] The organic layer 14 is an organic light emitting layer provided between the first electrode 13 and the second electrode 15. The organic layer 14 is provided as a layer common to the sub-pixels 101. Figure 1 In the example of FIG. 1C, the organic layer 14 is shared by the sub-pixels 101R, 101G, and 101B, and is configured to be able to emit white light. However, this does not limit the emission color of the organic layer 14 to not being white, and colors including red, blue, green, etc. may be used. That is, the emission color of the organic layer 14 may be, for example, any one of white, red, blue, or green.

[0110] The organic layer 14 has a configuration in which, for example, a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer are stacked in this order from the first electrode 13 toward the second electrode 15. The electron injection layer may be provided between the electron transport layer and the second electrode 15. The electron injection layer is used to improve the electron injection efficiency. Note that the configuration of the organic layer 14 is not limited thereto, and layers other than the light emitting layer are provided as needed.

[0111] The hole injection layer is a buffer layer used to improve the efficiency of hole injection into the light-emitting layer and reduce leakage. The hole transport layer is used to improve the efficiency of hole transport to the light-emitting layer. The electron transport layer is used to enhance the efficiency of electron transport to the light-emitting layer.

[0112] The light emitting layer generates light when electrons and holes are recombined due to an electric field. The light emitting layer is an organic compound layer containing an organic light emitting material.

[0113] (Second Electrode)

[0114] The second electrode 15 is disposed on the upper side of the organic layer 14. The portion of the second electrode 15 corresponding to the sub-pixel 101 (the portion corresponding to the light-emitting element 104) is disposed to face the first electrode 13. The second electrode 15 is disposed as an electrode common to a plurality of sub-pixels 101. The second electrode is formed in common in a plurality of sub-pixels. The second electrode 15 is a cathode electrode. The second electrode 15 is preferably a transparent electrode having transparency to light generated in the organic layer 14. The transparent electrode herein may be a transparent electrode including a transparent conductive layer, or a transparent electrode having a multilayer structure including a transparent conductive layer and a semi-transmitting reflective layer.

[0115] For example, as the transparent conductive layer, a transparent conductive material having good optical transparency and a small work function is preferably used. The transparent conductive layer may include, for example, a metal oxide. Specifically, examples of the material of the transparent conductive layer may include a material including at least one of a mixture of indium oxide and tin oxide (ITO), a mixture of indium oxide and zinc oxide (IZO), or zinc oxide (ZnO).

[0116] For example, the semi-transmissive reflective layer may include a metal layer. Specifically, examples of the material of the semi-transmissive reflective layer may include a material containing at least one metal element selected from the group consisting of magnesium (Mg), aluminum (Al), silver (Ag), gold (Au), and copper (Cu). The metal layer may contain the above at least one metal element as a constituent element of an alloy. Specific examples of the alloy include MgAg alloy, AgPdCu alloy, etc.

[0117] (Auxiliary Electrode)

[0118] In the display device 10 , the auxiliary electrode 31 is provided in the outer region 10B. The auxiliary electrode 26 relays electrical connection between various circuits formed on the substrate 11 side and the second electrode 15 .

[0119] The material of the auxiliary electrode 26 is not particularly limited as long as it is a conductive material, and for example, metal or the like can be used. Figure 2 As shown, the second electrode 15 extends from the display region 10A to the outside (the outer region 10B) and is connected to the auxiliary electrode 26 , so that electrical connection between the second electrode 15 and the auxiliary electrode 26 can be achieved.

[0120] exist Figure 2 In the example of FIG. 1 , the auxiliary electrode 26 is formed in a ring shape so as to surround the periphery of the display region 10A in a plan view of the display region 10A. However, Figure 2 is an example, and the layout of the auxiliary electrode 26 is not limited to the ring shape.

[0121] (Protective layer)

[0122] In the display device 10, preferably, the protective layer 16 is formed on the light emitting element substrate 103 to cover the formation surface side (first surface) of the light emitting element 104. The protective layer 16 makes it difficult for the first surface of the light emitting element 104 to contact with the outside air and suppresses moisture from entering the light emitting element 104 from the outside environment.

[0123] The protective layer 16 includes an insulating material. As the insulating material, for example, a thermosetting resin or the like can be used. In addition, the insulating material may be SiO, SiON, AlO, TiO, or the like. In this case, examples of the protective layer 16 include a CVD film including SiO, SiON, or the like and an ALD film including AlO, TiO, SiO, or the like. Note that a CVD film refers to a film formed by chemical vapor deposition. An ALD film refers to a film formed by atomic layer deposition. The protective layer 16 may be formed as a single layer or may have a multi-layer stacked structure. Figure 2 In the example of FIG. 1 , the protective layer 16 has a multilayer structure of a first protective layer 16A and a second protective layer 16B. The first protective layer 16A and the second protective layer may be layers each containing a predetermined insulating material, or the first protective layer 16A and the second protective layer 16B may include a CVD film and an ALD film, respectively.

[0124] In the case where the protective layer 16 has a multilayer structure in which the first protective layer 16A and the second protective layer 16B are sequentially stacked from the first surface side closer to the light-emitting element substrate 103, the second protective layer 16B generally has a weaker adhesion to the sealing layer 29 described later, etc. Therefore, it is preferable that the protective layer 16 is formed so that the contact area between the second protective layer 16B and the sealing layer 29 is narrower than the contact area between the first protective layer 16A. Specifically, in Figure 2In the example of FIG. 1 , the first protective layer 16A is formed over a wide range in the display region 10A and the external region 10B, and contacts and covers the wall portion 127 of the groove 27A. The outer end surface 162 of the first protective layer 16A is covered by the end surface coating portion 42 described later. The second protective layer 16B is formed so that the position of its outer end surface 163 is located on the display region 10A side relative to the groove 27A ( Figure 2 At a predetermined position on the -X direction side of the Figure 2 In the example of FIG. 1 , the outer end surface 163 of the second protective layer 16B is covered by the first planarizing layer 24 described later.

[0125] (covering part)

[0126] In the outer region 10B, when the thickness direction of the light emitting element substrate 103 is the line of sight direction, the protective layer 16 has a covering portion 160. The covering portion 160 is a portion that covers at least a portion of the surface (wall portion or bottom surface) of the groove or step of the protective layer 16. Covering at least a portion of the surface of the groove or step includes not only the case of directly covering the groove or step, but also the case of indirectly covering the groove or step via another layer.

[0127] exist Figure 2 In the example of FIG. 1 , the covering portion 160 includes the first protective layer 16A of the protective layer 16. In addition, the covering portion 160 contacts the wall portion 127 of the groove 27A, covers the first wall portion 127A, and covers a portion of the bottom surface 128 of the groove 27A. The covering portion 160 of the protective layer 16 has a concave structure or a step structure on its upper surface side (first surface side), and Figure 2 In the example, the step structure is formed on the upper surface side of the covering portion 160. In addition, the protective layer 16 forms an upper space 161 as a predetermined space on the upper surface side of the covering portion 160. The upper space 161 is a portion corresponding to the space on the upper surface side of the recessed structure or the step structure. In the case where the step structure is formed on the upper surface side of the covering portion 160, the upper space 161 represents a space defined as being above a portion of the outside of a side wall portion and a portion of the bottom of the step structure. In the case where the recessed structure is formed on the upper surface side of the covering portion 160, the upper space 161 represents a space defined as being surrounded by the inner surface of the recessed structure. In the groove or step (in Figure 2 An upper space 161 is formed just above the groove 27A in the example of FIG. 160 . In addition, the space (upper space 161 ) on the upper side of the cover portion 160 is filled with the sealing layer 29 , and the end surface 164 of the sealing layer 29 is covered by the end surface coating portion 42 .

[0128] (Planarization layer and functional layer)

[0129] The planarization layer 23 and the functional layer 105 are formed to cover the top (first surface) of the protective layer 16 .

[0130] (Planarization layer)

[0131] exist Figure 2 In the example of FIG. 1 , the first planarization layer 24 and the second planarization layer 25 are formed as the planarization layer 23. Figure 2 As shown, the first planarization layer 24 is formed on the protective layer 16. The first planarization layer 24 may be a layer containing an inorganic material or a layer containing an organic material. As an inorganic material, a material similar to the protective layer 16 may be exemplified. For example, the organic material may be a resin material or the like. The first planarization layer 24 may improve the flatness of the surface for forming the color filter 18 described later. In addition, the first planarization layer 24 together with the protective layer 16 makes it less likely that the first surface of the light emitting element 104 will come into contact with the outside air, and moisture may be inhibited from entering the light emitting element 104 from the outside environment.

[0132] exist Figure 2 In the example of FIG. 1 , the first planarizing layer 24 covers the second protective layer 16B and is formed so that the position ( Figure 2 The position on the +X direction side in the figure) and the predetermined position on the display area 10A side relative to the groove 27A ( Figure 2 The position on the -X direction side in the first planarization layer 24 is set to the position of the end face 165. The end face 165 of the first planarization layer 24 is covered with the second planarization layer 25 described later.

[0133] The second planarization layer 25 is formed on the first surface of the color filter 18 described later. The second planarization layer 25 may be a layer containing an inorganic material or a layer containing an organic material similar to the first planarization layer 24. The second planarization layer 25 may contain the same material as the first planarization layer 24, or may contain a different material.

[0134] (Functional layer)

[0135] Functional layer 105 is formed on first planarization layer 24. Functional layer 105 is a layer structure other than planarization layer 23, and indicates a layer structure formed on the upper side of protective layer 16. Examples of functional layer 105 include color filter 18, sealing layer 29, filling layer 28, and lens 21.

[0136] (Color Filter)

[0137] In the display device 10, the color filter 18 is provided on the first surface side (upper side, +Z direction side) of the first planarization layer 24. For example, the color filter 18 can be exemplified as an on-chip color filter (OCCF). For example, the color filter 18 is provided with a first color filter 19 and a second color filter 20. For example, the material of the color filter 18 can be exemplified as an organic material.

[0138] (First color filter)

[0139] The first color filter 19 is preferably formed substantially in the display region 10A. In addition, the first color filter 19 is provided according to the color type of the sub-pixel 101. Examples of the first color filter 19 include Figure 1 C. The red filter 19R, the green filter 19G, and the blue filter 19B are respectively provided in the sub-pixels 101R, 101G, and 101B. Since the first color filter 19 is provided in the display device 10, light of the color type corresponding to the sub-pixels 101R, 101G, and 101B can be effectively extracted to the outside.

[0140] (Second color filter)

[0141] The second color filter 20 is formed outside the first color filter 19 disposed on the outermost side. Figure 2 In the embodiment of the present invention, the second color filter 20 is basically formed in the outer region 10B. The second color filter 20 is formed to cover the upper side (+Z direction side) of the auxiliary electrode 26. The second color filter 20 is used as a layer with light shielding properties. The second color filter 20 has a structure of stacking a red color filter (red color filter 20R) and a blue color filter (blue color filter 20B). By using similar materials, the red color filter 20R can be formed simultaneously with the red color filter 19R. By using similar materials, the blue color filter 20B can be formed integrally with the blue color filter 19B at the same time.

[0142] For example, the red filter 20R can be exemplified as a filter that easily allows light of the red wavelength band in visible light to pass through and easily absorbs light of other color wavelength bands. The blue filter 20B can be exemplified as a filter that easily allows light of the blue wavelength band in visible light to pass through and easily absorbs light of other color wavelength bands. According to this structure of stacking the red filter 20R and the blue filter 20B, light shielding in a wide range of wavelength bands can be achieved. Therefore, among the light generated by the light-emitting element 104 in the display area 10A, the light that obliquely propagates outward from the external area 10B is substantially suppressed from passing through the second filter 20. Therefore, the effect of suppressing light leakage of the second filter 20 is exhibited. The light propagating from the outside of the display device 10 to the substrate 11 side is blocked by the second filter 20, and the entry of external light is suppressed.

[0143] As described above, the second color filter 20 has a light shielding property in a state where the red filter 20R and the blue filter 20B are stacked, and the multilayer structure of the red filter 20R and the blue filter 20B functions as a light shielding filter. Figure 2 In the example shown in A, the innermost end of the second color filter 20 is in contact with the outermost end of the first color filter 19 .

[0144] The end surface 167 at the outer end of the second color filter 20 is located at a predetermined position closer to the display region 10A side than the groove 27A and is covered with the second planarizing layer 25 .

[0145] (Sealing layer)

[0146] The sealing layer 29 is formed on the color filter 18. The sealing layer 29 is preferably formed in a region covering at least a portion of the second color filter 20 with the thickness direction of the light emitting element substrate 103 as a line of sight (in a plan view of the light emitting element substrate 103), and is preferably formed in a region substantially covering the outer region 10B. Figure 2 In the example of , the sealing layer 29 is formed to cover the second planarization layer 25. In addition, the sealing layer 29 is formed to fill at least a portion of the upper space 161 formed on the upper side of the cover portion 160, thereby covering the space in the groove 27A (the groove inner space 129). Figure 2 In the example of , the upper space 161 is filled with a sealing layer 29, and the end surface coating portion 42 covers the end surface 164 of the sealing layer 29. The sealing layer 29 is formed of a sealing material. The sealing material 29A is preferably a transparent adhesive layer. As the material of the sealing layer 29 (the material of the sealing material 29A), a resin material or the like can be used. The material of the sealing layer 29 is not particularly limited, but a material having a higher moisture resistance than the color filter 18 is appropriately used. A hygroscopic material can be added to the sealing layer 29.

[0147] (lens)

[0148] The functional layer 105 may have a lens 21. The lens 21 is preferably formed on the first color filter 19 (on the first surface). Figure 1 In the example of FIG. 1 , the lens 21 is provided to correspond to the layout of each sub-pixel 101. The lens 21 is preferably an on-chip lens (OCL).

[0149] The shape of the lens 21 is not particularly limited. For example, the lens 21 may be formed into a convex shape (so-called convex lens) having a curved surface that is convexly curved on the first surface side. Figure 2 In the description, for convenience, the shape of the lens 21 is not particularly limited. This also applies to Figure 3 , Figure 5 ,as well as Figures 7 to 17 Because the lens 21 is provided, it is easier to adjust the light generated from the light emitting element 104 to be emitted from the display region 10A, and the utilization efficiency of the light can be improved.

[0150] (Filling layer)

[0151] In the display area 10A, as shown in FIG. Figure 2 As shown, the filling layer 28 is preferably provided to cover the first surface side of the lens 21. By providing the filling layer 28, the first surface side of the display area 10A can be smoothed, and the lens 21 and the light emitting element 104 can be protected from the influence of external air and moisture. Similar to the above-mentioned sealing layer 29, the filling layer 28 is preferably a layer having the function of a transparent adhesive layer. As the material of the filling layer 28, a resin material can be used similarly to the above-mentioned sealing layer 29.

[0152] Note that Figure 2 In the example of FIG. 2 , the filling layer 28 is different from the sealing layer 29 described above, but this is an example and the present disclosure is not limited thereto. The filling layer 28 may be formed integrally with the sealing layer 29. Figure 2 As shown in the example of FIG. 1 , this can be done by forming a fill layer 28 on a surface to cover the surface including the Figure 2 In this case, the filling layer 28 also serves as the sealing layer 29. Note that in this case, the sealing material 29A includes the material forming the filling layer 28, and the upper space 161 is also filled with the material forming the filling layer 28.

[0153] (Sealing substrate)

[0154] The sealing substrate 22 may be provided to cover the filling layer 28 (not shown). As the material of the sealing substrate 22, the material of the substrate 11 or the like may be used. For example, a glass substrate may be used as the sealing substrate 22. The material of the glass substrate is not limited to any specific material as long as the glass substrate contains a material that transmits the light emitted from the light emitting element 104. Examples of the material of the glass substrate include various glass substrates such as high strain point glass, soda glass, borosilicate glass, and lead glass, as well as a quartz substrate.

[0155] (Shape of End of Sealing Substrate)

[0156] At the end 41 of the sealing substrate 22, the inclined portion 40 is preferably formed on the side of the surface (second surface) facing the light-emitting element substrate 103. The inclined portion 40 forms an inclined surface that is inclined downward toward the inside from the position of the end surface 41A of the sealing substrate 22 on the second surface of the sealing substrate 22. The position of the proximal end 40A (inner end) of the inclined portion 40 is not particularly limited, but is preferably a position directly above the bottom surface 128 of the groove 27A. Figure 2In the example of , the inclined portion 40 forms a curved inclined surface, and the end face 164 of the sealing layer 29 is formed directly below the proximal end 40A of the inclined portion 40. In this case, the position of the interface between the end face coating portion 42 and the sealing layer 29 described later can be located inside the bottom surface 128 of the groove 27A, and by making the position of the end face 164 of the sealing layer 29 roughly consistent with the position of the outer end face 162 of the first protective layer 16A in the inner and outer directions, it is easy to form a state in which a part of the space 129 in the groove (portion 129A) is filled with the end face coating portion 42.

[0157] (End surface coating)

[0158] It is preferable to provide an end surface coating portion 42 between the light emitting element substrate 103 and the sealing substrate 22 so as to cover the outside of the sealing layer 29. Figure 2 In the example of , the end face coating portion 42 contacts the second wall portion 127B and a portion of the bottom surface 128, fills a portion 129A of the space 129 in the groove, and covers the end face 164 of the sealing layer 29 and the outer end face 162 of the first protective layer 16A. The material of the end face coating portion 42 is not particularly limited, but for example, a material similar to the coating layer, such as a resin material, can be exemplified. The end face coating portion 42 covers the end face of the sealing layer 29, etc. In addition, depending on the layer structure, the end face coating portion 42 can cover not only the end faces of the sealing layer 29 and the protective layer 16, but also the end faces of the inorganic insulating layer 12, the substrate 11, etc.

[0159] [1-2 Manufacturing method]

[0160] The description will continue with an example of a method for manufacturing the display device 10. Figure 3 As shown in FIG. 1A, a circuit and the like are mounted on a substrate 11 to form an inorganic insulating layer 12, and wiring 110, an auxiliary electrode 26, etc. are formed. In the inorganic insulating layer 12, a groove or a step ( Figure 3 The groove 27A in the example of A is formed in the outer region 10B. Figure 3 As shown in FIG. 1B, the light emitting element 104 is further formed to form the light emitting element substrate 103, and the protective layer 16 is formed on the first surface side of the light emitting element substrate 103. Figure 3 C, a first planarization layer 24, a color filter 18, a second planarization layer 25, and a lens 21 are formed. At this time, the first color filter 19 and the second color filter 20 are formed as the color filter 18. The color filter 18 is an OCCF. At this point, a general manufacturing process of a display device can be performed. Next, a filling layer 28 is formed to cover the lens 21. Then, the periphery of the filling layer 28 is covered with a sealing layer 29 ( Figure 3 D) In ​​addition, if Figure 4As shown in A, the sealing substrate 22 is set. When the sealing substrate 22 is arranged, force is applied from the sealing substrate 22 to the filling layer 28 and the sealing layer 29, the gap between the filling layer 28 and the sealing layer 29, and the end surface 164 of the sealing layer 29 advances to the upper space 161 ( Figure 4 B) The position of the end surface 164 of the sealing layer 29 is substantially at the position of the proximal end 40A of the inclined portion 40 in the sealing substrate 22 (at Figure 4 A and Figure 4 B, for the sake of convenience, the description of the inclined portion 40 is omitted). In addition, the portion of the protective layer 16 located outside the end surface 164 of the sealing layer 29 is removed by etching ( Figure 4 B). At this time, a portion of the protective layer 16 formed in the groove 27A is removed to expose a portion (portion 129A) of the space 129 in the groove. Then, the end surface coating portion 42 is formed to cover the outer end surface 162 of the first protective layer 16A and the end surface 164 of the sealing layer 29. At this time, the portion 129A of the space 129 in the groove is filled with the end surface coating portion 42. In addition, the end surface 169 of the inorganic insulating layer 12 can also be covered by the end surface coating portion 42. Therefore, it is possible to manufacture Figure 2 The manufacturing method shown here is an example, and the manufacturing method of the display device 10 is not limited thereto.

[0161] [1-3 Functions and effects]

[0162] In a display device, when moisture enters from the outside and reaches the display area from the outside area, there is a possibility that the light-emitting element or the like is damaged and a non-light-emitting area is generated in the display area. Therefore, the display device needs to suppress the entry of moisture. It is conceivable that the entry path of moisture is along a path along the interface of different layer structures and a path through the inside of a layer where moisture may enter.

[0163] In the display device 10 according to the first embodiment, as Figure 2 As shown in , a groove 27A is formed, and a covering portion 160 of the protective layer 16 is formed along the wall portion 127 and the bottom surface 128 to cover a portion of the wall portion 127 and the bottom surface 128 of the groove 27A. Therefore, the path length (the length of the moisture entry path N1) from the external area through the interface between the inorganic insulating layer 12 and the protective layer 16 to the display area can be extended. In addition, even if moisture enters the protective layer 16, a step structure or a recessed structure is formed on the upper surface side of the covering portion 160 (forming an upper space 161), so that the length of the entry path (the length of the moisture entry path N2) that the moisture travels through the inside of the protective layer 16 and reaches the display area can be extended.

[0164] In addition, the upper space 161 is formed on the upper surface side (+Z direction side) of the formation portion of the cover portion 160 of the protective layer 16, and the sealing layer 29 is embedded in the upper space 161. Even if a concave structure or a step structure is formed on the first surface side of the cover portion 160 of the protective layer 16, the concave structure or the step structure can be filled with the sealing layer, and the smoothness of the first surface side in the display device 10 (at the +Z direction side) can be maintained. Figure 2 , smoothness of the first surface side of the sealing layer 29).

[0165] [1-4 Modification Example]

[0166] In the display device 10 of the first embodiment, Figure 2 In the example of FIG. 1 , the inorganic insulating layer 12 has the groove 27A, but the present invention is not limited thereto. For example, in the inorganic insulating layer 12, a groove 27A may be formed as follows: Figure 5 The step 27B shown in FIG. 2 is substituted for the groove 27A. This form is referred to as a modified example of the first embodiment. Figure 5 is a cross-sectional view showing an example of a display device 10 according to a modification of the first embodiment. The display device is similar to the above-described display device 10 except for the step 27B and the structure covering the step 27B. Figure 2 The display device 10 of the first embodiment is shown in FIG.

[0167] (Stairs)

[0168] The step 27B is formed near the outer end of the outer region 10B. Figure 5 In the example of FIG. 1 , the step 27B forms a step structure on the end surface 169 of the outer end of the inorganic insulating layer 12 (the step structure becomes the first height difference portion 133 due to the step 27B). The step structure is a structural portion that forms a position difference (height difference) (position in the Z-axis direction) relative to the first surface of the inorganic insulating layer 12 in the height direction. It should be noted that in the case where the Z-axis direction is the line of sight direction, the wall portion 130 of the step 27B is preferably formed at a position closer to the display area 10A than the proximal end 40A of the inclined portion 40 ( Figure 5 -X direction side in the image).

[0169] (covering part)

[0170] exist Figure 5 In the example of , the covering portion 160 of the protective layer 16 includes the first protective layer 16A. The covering portion 160 is formed so as to contact at least a portion of the bottom surface 131 connected to the wall portion 130 forming the step 27B at the lower end of the wall portion 130 of the step 27B, and cover a portion of the wall portion 130 and the bottom surface 131. The covering portion 160 forms the second height difference portion 134, an upper space 161 is formed above the covering portion 160, and the sealing layer 29 fills the upper space 161.

[0171] (End surface coating)

[0172] The end surface coating portion 42 is formed to be in contact with the end surface of the protective layer 16 (at Figure 5 In the example of the first protective layer 16A, the end surface 162 contacts and covers the end surface 164 of the sealing layer 29. In addition, the end surface coating portion 42 covers a portion of the end surface 169 of the surface of the inorganic insulating layer 12 and a portion of the bottom surface (portion 132) exposed to the outside from the covering portion 160.

[0173] Furthermore, in the display device 10 according to the first modification example of the first embodiment, effects similar to those of [1-3 Functions and Effects] shown above can be obtained.

[0174] [2 Second Embodiment]

[0175] like Figure 7 As shown, the display device 10 according to the second embodiment forms a groove or a step at a lower position of the color filter 18. Except for the position where the groove or the step is formed, the display device 10 according to the second embodiment is similar to the display device of the first embodiment. Hereinafter, the description of the configuration similar to the configuration of the first embodiment is redundant and will be omitted. The same applies to each embodiment described below in the third embodiment. Figure 7 is a cross-sectional view schematically showing an example of a display device according to a second embodiment.

[0176] (groove or step)

[0177] In the display device 10 according to the second embodiment, the groove or the step is formed in the inorganic insulating layer 12. Figure 7 In the example of , the groove 27A is formed in the inorganic insulating layer 12. When the thickness direction (Z-axis direction) of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed at the lower position (directly below) of the second color filter 20. The groove 27A may also be formed in a ring shape as in the first embodiment.

[0178] (Protective layer)

[0179] exist Figure 7In the example of the embodiment, the protective layer 16 has a multilayer structure of the first protective layer 16A and the second protective layer 16B similar to the first embodiment. In this example, the covering portion 160 of the protective layer 16 also has a multilayer structure of the first protective layer 16A and the second protective layer 16B. In addition, the covering portion 160 contacts the wall portion 127 (the first wall portion 127A and the second wall portion 127B) and the bottom surface 128 of the groove 27A, and fills at least a portion of the space 129 in the groove. The covering portion 160 forms a recessed structure as the second height difference portion 134 on the upper surface side (the first surface side), and forms an upper space 161 inside the recessed structure.

[0180] (Planarization layer)

[0181] As the planarization layer 23, a first planarization layer 24 covering at least a portion of the protective layer 16 and a second planarization layer 25 covering the color filter 18 are formed. The second planarization layer 25 is formed in a manner similar to the first embodiment. The first planarization layer 24 is formed in a region covering the groove 27A in a plan view of the light emitting element substrate 103. The first planarization layer 24 covers the upper side of the second height difference portion 134 of the protective layer 16, that is, covers the upper space 161 formed at the position of the covering portion 160. The first planarization layer 24 is preferably formed to fill the upper space 161 (formed to avoid forming the cavity 170), but is not limited thereto. Figure 7 In the example of , the cavity 170 is formed to close the upper opening of the upper space 161, and is surrounded by the cover 160 and the first planarization layer 24. The first planarization layer 24 preferably contains a material having excellent hygroscopicity. In addition, the first planarization layer 24 is preferably a layer having a hygroscopic member. Because the first planarization layer 24 has a hygroscopic member and closes the upper opening of the upper space 161 formed on the upper side of the groove 27A, moisture is easily removed from the outside through the hygroscopic member of the first planarization layer 24. Therefore, moisture is less likely to enter the display area 10A through the inside of the first planarization layer 24, and moisture is less likely to enter along the interface between the first planarization layer 24 and the second protective layer 16B.

[0182] (Color Filter)

[0183] The first color filter 19 and the second color filter 20 are formed similarly to the first embodiment as the color filter 18. In the display device 10 according to the second embodiment, when the thickness direction of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed on the lower side of the formation region of the second color filter 20.

[0184] According to the display device 10 of the second embodiment, effects similar to those of the first embodiment can be obtained.

[0185] In the display device 10 according to the second embodiment, since the upper space 161 is formed on the upper surface of the cover 160 formed on the groove 27A covered by the first planarization layer 24, the flatness of the first surface side can be improved. Therefore, the second color filter 20 can be closely formed as the functional layer 105 on the first planarization layer 24 (the upper side of the upper space 161).

[0186] [3. Third Embodiment]

[0187] In the display device 10 according to the third embodiment, as Figure 8 As shown, the first planarization layer 24 has a structure of stacking an upper planarization layer 24A and a lower planarization layer 24B. The display device 10 according to the third embodiment is similar to the display device according to the second embodiment except for the structure of the first planarization layer 24. Hereinafter, the description of the configuration similar to the first and second embodiments is redundant and will be omitted. Figure 8 is a cross-sectional view schematically showing an example of a display device 10 according to the third embodiment.

[0188] (groove or step)

[0189] In the display device 10 according to the third embodiment, the groove or the step is formed in the inorganic insulating layer 12. Figure 8 In the example of , the groove 27A is formed in the inorganic insulating layer 12. When the thickness direction (Z-axis direction) of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed at the lower position (directly below) of the second color filter 20 and is formed on the lower side of the lower planarization layer 24B. The groove 27A may also be formed in a ring shape as in the first embodiment.

[0190] (Planarization layer)

[0191] Like the planarization layer 23, the first planarization layer 24 is formed to cover at least a portion of the protective layer 16, and the second planarization layer 25 covers the color filter 18. The second planarization layer 25 is formed in a manner similar to the first embodiment. As described above, the first planarization layer 24 has a structure of stacking an upper planarization layer 24A and a lower planarization layer 24B. Taking the thickness direction of the light-emitting element substrate 103 as the line of sight direction, the upper planarization layer 24A is formed in the display area 10A and the external area 10B. Taking the thickness direction of the light-emitting element substrate 103 as the line of sight direction, the lower planarization layer 24B is formed in the external area 10B, and is formed in the area covering the groove 27A, with the covering portion 160 interposed therebetween. The lower planarization layer 24B covers the upper space 161 formed on the upper surface side of the covering portion 160 of the protective layer 16. Preferably, the lower planarization layer 24B is formed to fill the upper space 161, but is not limited thereto. In Figure 8In the example of , the lower planarizing layer 24B is formed to close the upper opening of the upper space 161, and a cavity 170 surrounded by the cover 160 and the lower planarizing layer 24B is formed. The lower planarizing layer 24B preferably contains a material having excellent hygroscopicity. In addition, the lower planarizing layer 24B is preferably a layer having a hygroscopic member. In the first planarizing layer 24, the hygroscopic member may be mixed only in the lower planarizing layer 24B and the lower planarizing layer 24B of the upper planarizing layer 24A. In this case, because the first planarizing layer 24 provided in the display area 10A is the upper planarizing layer 24A, the hygroscopic member is avoided from being mixed in the portion of the first planarizing layer 24 on the display area 10A. Therefore, the need to consider the possibility that the propagation of light generated from the light emitting element 104 is affected by the hygroscopic member when passing through the first planarizing layer 24 can be eliminated. In addition, since the lower planarizing layer 24B has a hygroscopic component and seals the upper space 161 formed on the upper side of the groove 27A, when moisture enters along the interface between the first planarizing layer 24 and the second protective layer 16B, the boundary between the lower planarizing layer 24B and the second protective layer 16B exists in a part of the moisture entry path, and when the moisture entering from the outside reaches the boundary between the lower planarizing layer 24B and the second protective layer 16B, the moisture can be easily removed by the hygroscopic component of the lower planarizing layer 24B.

[0192] According to the display device 10 of the third embodiment, effects similar to those of the first embodiment can be obtained.

[0193] [4 Fourth Embodiment]

[0194] In the display device 10 according to the fourth embodiment, as Fig. 9 As shown, a groove or a step is formed in the formation area of ​​the auxiliary electrode 26. Except for the position where the groove or the step is formed, the display device 10 according to the fourth embodiment is similar to the display device of the first embodiment. Hereinafter, the description of the configuration similar to the configuration of the first embodiment is redundant and will be omitted. Fig. 9 is a cross-sectional view schematically showing an example of a display device 10 according to a fourth embodiment.

[0195] (groove or step)

[0196] In the display device 10 according to the fourth embodiment, a groove or a step is formed in the inorganic insulating layer 12. Fig. 9 In the example of , the groove 27A is formed in the inorganic insulating layer 12. In the case where the thickness direction of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed below the auxiliary electrode 26. In particular, as Fig. 9As shown in the example of FIG. 1 , the groove 27A is preferably formed directly below the connection portion 171 between the auxiliary electrode 26 and the second electrode 15 . The auxiliary electrode 26 is generally formed in a ring shape in the outer region 10B, and the groove 27A may be formed in a ring shape similar to the auxiliary electrode 26 .

[0197] (Auxiliary Electrode)

[0198] exist Fig. 9 In the example of FIG. 1 , the auxiliary electrode 26 is formed to contact and cover the wall portion 127 (first wall portion 127A and second wall portion 127B) and the bottom surface 128 of the groove 27A. The auxiliary electrode 26 is electrically connected to the second electrode 15 in a predetermined region on the first surface side.

[0199] (Connection portion between auxiliary electrode and second electrode)

[0200] The second electrode 15 constituting the light emitting element 104 is connected to the auxiliary electrode 26. The connection portion 171, which is a portion where the second electrode 15 and the auxiliary electrode 26 are connected to each other, is preferably formed in a region covering a portion including at least a portion of a portion corresponding to the groove 27A. Since the connection portion 171 exists in a region covering at least a portion of a portion corresponding to the groove 27A, the connection area between the second electrode 15 and the auxiliary electrode 26 can be increased, and the contact resistance between the second electrode 15 and the auxiliary electrode 26 can be reduced.

[0201] (Protective layer)

[0202] exist Fig. 9 In the example of , the protective layer 16 has a multilayer structure of the first protective layer 16A and the second protective layer 16B similar to the first embodiment. The covering portion 160 of the protective layer 16 also has a multilayer structure of the first protective layer 16A and the second protective layer 16B. In addition, the covering portion 160 covers the groove 27A with the connecting portion 171 interposed therebetween. Fig. 9 In the example of FIG. 1 , the cover portion 160 forms a recessed structure on the upper side (first surface side) of the groove 27A, and an upper space 161 is formed inside the recessed structure.

[0203] (First planarization layer)

[0204] The first planarization layer 24 is formed to cover the protective layer 16 and fill the upper space 161. The first planarization layer 24 has good hygroscopicity. The first planarization layer 24 may be a layer including a hygroscopic member.

[0205] According to the display device 10 of the fourth embodiment, similar effects to those of the first embodiment can be obtained.

[0206] [5 Fifth Embodiment]

[0207] In the display device 10 according to the fifth embodiment, as Fig.10 As shown, the groove or step is provided on the display region 10A side relative to the formation region of the auxiliary electrode 26 ( Fig.10 However, the groove or step is provided outside the display area 10A (the outer area 10B ( Fig.10 The display device 10 according to the fifth embodiment is similar to the display device of the first embodiment except for the position where the groove or step is formed. Hereinafter, the description of the configuration similar to that of the first embodiment is redundant and thus will be omitted. Fig.10 is a cross-sectional view schematically showing an example of a display device 10 according to a fifth embodiment.

[0208] (groove or step)

[0209] In the display device 10 according to the fifth embodiment, the groove or the step is formed in the inorganic insulating layer 12. Fig.10 In the example of , the groove 27A is formed in the inorganic insulating layer 12. In the case where the thickness direction of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed at a position closer to the display region 10A side than the formation region of the auxiliary electrode 26, and is formed at a position outside the display region 10A (position of the outer region 10B). More specifically, the groove 27A is formed between the outermost first electrode 13 and the auxiliary electrode 26 among the first electrodes 13 forming the light emitting element 104. The groove 27A may be formed in a ring shape in the outer region 10B.

[0210] (Organic layer and second electrode)

[0211] exist Fig.10 In the example of , the organic layer 14 and the second electrode 15 constituting the light-emitting element 104 are formed in the display area 10A, and are continuously formed from the display area 10A to a predetermined area of ​​the external area 10B. The organic layer 14 and the second electrode 15 are connected to the auxiliary electrode 26. In the case where the thickness direction of the light-emitting element substrate 103 is the line of sight direction, the organic layer 14 is preferably formed to cover a portion including at least a portion of the groove 27A. The second electrode 15 is preferably formed to cover a portion including at least a portion of the groove 27A in which the organic layer 14 is interposed. Fig.10 In the example of FIG. 1 , the organic layer 14 covers the wall portion 127 and the bottom surface 128 of the groove 27A. The second electrode 15 covers the wall portion 127 and the bottom surface 128 of the groove 27A with the organic layer 14 interposed therebetween.

[0212] (Protective layer)

[0213] exist Fig.10In the example of FIG. 1 , the protective layer 16 has a multilayer structure of the first protective layer 16A and the second protective layer 16B similar to the first embodiment. The covering portion 160 of the protective layer 16 also has a multilayer structure of the first protective layer 16A and the second protective layer 16B. The covering portion 160 covers the groove 27A between which the organic layer 14 and the second electrode 15 are interposed. Fig.10 In the example, the cover 160 contacts the first surface of the second electrode 15 on the second surface side, forms a recessed structure on the upper surface side (first surface side) of the groove 27A, and forms an upper space 161 inside the recessed structure.

[0214] (First planarization layer)

[0215] The first planarization layer 24 is formed to cover the protective layer 16 and the upper space 161. Fig.10 In the example of , the cavity 170 is formed between the first planarization layer 24 and the cover 160. However, this does not limit the first planarization layer 24 to be formed to fill the upper space 161. The first planarization layer 24 has good hygroscopicity. The first planarization layer 24 may be a layer including a hygroscopic member.

[0216] According to the display device 10 of the fifth embodiment, it is possible to obtain an effect similar to that of the first embodiment. In addition, in the display device 10 according to the fifth embodiment, since the organic layer 14 is formed to cover the wall portion 127 and the bottom surface 128 of the groove 27A, even in the case where moisture enters along the interface between the organic layer 14 and the layer contacting the organic layer 14, or in the case where moisture enters through the inside of the organic layer 14, the moisture transmission path can be extended.

[0217] [6 Sixth Embodiment]

[0218] like Fig.11 and Fig.12 As shown, the display device 10 according to the sixth embodiment is provided with a connection terminal 43. However, the connection terminal 43 is provided outside the groove or the step. Fig.11 and Fig.12 1 is a plan view and a cross-sectional view schematically showing an example of a display device 10 according to a sixth embodiment. Fig.11 and Fig.12In an example of the display device 10 according to the sixth embodiment shown in , the position of the end face 165 of the first planarization layer 24 is formed at a position closer to the display area 10A than the end face 167 of the second color filter 20, and the second color filter 20 is covered by the second planarization layer 25. Except for the configuration of the first planarization layer 24, the second planarization layer 25 and the connection terminal 43, the example of the display device 10 according to the sixth embodiment is similar to the second embodiment. In the following, the description of the configuration similar to the configuration of the second embodiment is redundant and will be omitted. In addition, the following description of the seventh to eleventh embodiments is described by taking the case where a new structure is provided in the structure of the sixth embodiment as an example.

[0219] (Connection terminal)

[0220] In the display device 10, the connection terminal 43 is formed in the outer region 10B and outside the groove or step (in Fig.11 and Fig.12 The connection terminal 43 is formed on the outer side of the end surface coating portion 42. The connection terminal 43 is used as a terminal for electrically connecting various circuits provided on the substrate 11 to an external device such as another control circuit substrate. The connection terminal 43 is formed on the substrate 11. The connection terminal 43 is preferably a pad composed of a conductive member such as metal. The inorganic insulating layer 12 is formed around the connection terminal 43. The end surface of the connection terminal 43 may be covered by the inorganic insulating layer 12. The layout of the connection terminal 43 is not particularly limited, but Fig.11 In the example in one direction ( Fig.11 Extends in the Y-axis direction).

[0221] (First planarization layer and second planarization layer)

[0222] Similar to the second embodiment, the first planarizing layer 24 is formed to cover the upper space 161. The end surface 165 of the first planarizing layer 24 is closer to the outer region 10B (at the bottom) than the outer end surface 163 of the second protective layer 16B and the end surface 167 of the second color filter. Fig.12 The end face 165 of the first planarizing layer 24 is covered by the second color filter 20. Note that the second planarizing layer 25 covers the end face 167 at the outer end of the second color filter 20.

[0223] (Sealing substrate)

[0224] In the display device 10 according to the sixth embodiment, the sealing substrate 22 is provided to cover the filling layer 28 and the sealing layer 29. In the case where the Z-axis direction is the line of sight direction, the position of the end surface 41A of the sealing substrate 22 is a position closer to the display region 10A than the connection terminal 43. The inclined portion 40 is formed in a predetermined portion inward from the position of the end surface 41A of the sealing substrate 22. Fig.12 In the example of FIG. 4 , the inclined portion 40 forms an inclined surface.

[0225] Note that in the display device 10 according to the sixth embodiment, the outer end surface (at the Fig.12 In the example of FIG. 1 , the position of the outer end surface 162 of the first protective layer 16A and the position of the end surface 164 of the sealing layer 29 are preferably positioned closer to the display area 10A than the position of the proximal end 40A of the inclined portion 40. In this case, the end surface coating portion 42 is formed just below the proximal end 40A of the inclined portion 40, and the end surface coating portion 42 covers the outer end surface 162 of the first protective layer 16A and the end surface 164 of the sealing layer 29. Then, in Fig.12 In the example, the lower end (end on the second surface side) of the end coating portion 42 is in contact with the inorganic insulating layer 12. Since the end coating portion 42 is formed in this way, it is easier and more effective to block moisture from entering the protective layer 16, the color filter 18, etc. from the outside.

[0226] In the display device 10 according to the sixth embodiment, the position of the outer end surface 162 of the first protective layer 16A exists outside the groove 27A (at Fig.12 In the sixth embodiment, the first protective layer 16A is formed to contact the wall portion 127 and the bottom surface 128 of the groove 27A and cover the wall portion 127 and the bottom surface 128, so that the moisture entry path can be extended along the interface between the first protective layer 16A and the layer in contact with the first protective layer 16A. According to the display device 10 of the sixth embodiment, when the outer end of the first protective layer 16A is removed before the end surface coating portion 42 is set when manufacturing the display device 10, even if moisture enters from the first protective layer 16A, the moisture hardly reaches the display area along the interface between the first protective layer 16A and the layer in contact with the first protective layer 16A. In addition, according to the display device 10 of the sixth embodiment, moisture hardly reaches the display area 10A along the inside of the first protective layer 16A.

[0227] In the display device 10 according to the sixth embodiment, similar to the second embodiment, since the upper space 161 is formed on the upper surface of the cover 160 formed on the groove 27A covered with the first planarization layer 24, even if a recessed structure formed by the upper space 161 is formed on the first surface side, the flatness of the first surface side can be improved. Therefore, the second color filter 20 can be closely formed as the functional layer 105 on the first planarization layer 24 (the upper side of the upper space 161).

[0228] [7 Seventh Embodiment]

[0229] In the display device 10 according to the seventh embodiment, as Fig.13 As shown, the outer end surface 162 of the first protection layer 16A is covered with the sealing layer 29 . Fig.13 1 is a cross-sectional view schematically showing an example of the display device 10 according to the seventh embodiment. Fig.13 The example of the display device 10 of the seventh embodiment shown in FIG. 1 is similar to the display device according to the sixth embodiment. Hereinafter, the description of the configuration similar to that of the sixth embodiment is redundant in the description of the seventh embodiment and will be omitted.

[0230] (First protective layer)

[0231] Similar to the sixth embodiment, the first protective layer 16A is formed to cover the groove 27A. In the case where the Z-axis direction is the line of sight, the outer end surface 162 of the first protective layer 16A is located outside the outer end surface 163 of the second protective layer. The outer end surface 162 of the first protective layer 16A is located inside (-X direction side) of the position of the end surface 164 of the sealing layer 29. Note that the end surface 164 is covered by the sealing layer 29.

[0232] (covering part)

[0233] Note that, similar to the sixth embodiment, the cover portion 160 of the protective layer 16 has a multilayer structure of the first protective layer 16A and the second protective layer 16B, and contacts and covers the wall portion 127 and the bottom surface 128 of the groove 27A.

[0234] According to the display device of the seventh embodiment, effects similar to those of the sixth embodiment can be obtained.

[0235] [8 Eighth Embodiment]

[0236] In the display device according to the eighth embodiment, as Fig.14 As shown, the protection layer 16 has a three-layer multilayer structure, and the outermost end surface of the protection layer 16 is covered by the sealing layer 29 . Fig.14 1 is a cross-sectional view schematically showing an example of a display device 10 according to an eighth embodiment. Fig.14 The example of the display device 10 of the eighth embodiment shown in FIG. 1 is similar to the display device 10 according to the sixth embodiment. Hereinafter, the description of the configuration similar to that of the sixth embodiment is redundant and thus will be omitted.

[0237] (Protective layer)

[0238] exist Fig.14 In the example of , the protective layer 16 has a multilayer structure in which the first protective layer 16A, the second protective layer 16B, and the third protective layer 16C are stacked in this order from the side closer to the light-emitting element substrate 103. Each of the first protective layer 16A, the second protective layer 16B, and the third protective layer 16C may be an inorganic layer or an organic layer. For example, the first protective layer 16A and the third protective layer 16C may be an inorganic layer, and the second protective layer 16B may be an organic layer. As described above, the protective layer 16 may have a structure in which an inorganic layer and an organic layer are stacked.

[0239] (covering part)

[0240] exist Fig.14 In the example of , the covering portion 160 of the protective layer 16 has a multilayer structure of the first protective layer 16A, the second protective layer 16B, and the third protective layer 16C. And, the covering portion 160 contacts the wall portion 127 (the first wall portion 127A and the second wall portion 127B) and the bottom surface 128 of the groove portion 27A, and covers the wall portion 127 and the bottom surface 128. The covering portion 160 forms a recessed structure on the upper surface side (the first surface side), and forms an upper space 161 inside the recessed structure.

[0241] The third protective layer 16C is formed to cover the outer end surface 162 of the first protective layer 16A and the outer end surface 163 of the second protective layer 16B, and the outer end surface of the protective layer 16 includes the third protective layer 16C. The outer end of the third protective layer 16C is in the outer direction ( Fig.14 The outer surface of the inorganic insulating layer 12 extends in the +X direction) to contact the inorganic insulating layer 12.

[0242] (Sealing layer)

[0243] The sealing layer 29 covers the third protective layer 16C, and covers the outer end surface 162 of the first protective layer 16A and the outer end surface 163 of the second protective layer 16B with the third protective layer 16C interposed therebetween.

[0244] In the display device 10 according to the eighth embodiment, the protective layer 16 has a three-layer multilayer structure, the outer end surface 162 of the first protective layer 16A is covered with the third protective layer 16C, and the outer side of the third protective layer 16C is covered with the sealing layer 29. Therefore, the possibility of moisture entering the first protective layer 16A from the outside can be suppressed.

[0245] [9 Ninth Embodiment]

[0246] In the display device 10 according to the ninth embodiment, as Fig.15 As shown, the covering portion 160 of the protective layer 16 partially includes the second protective layer 16B. Fig.15 is a cross-sectional view schematically showing an example of a display device according to a ninth embodiment. Fig.15 The example of the display device of the ninth embodiment shown in FIG. 1 may be similar to the display device according to the sixth embodiment. Hereinafter, the description of the configuration similar to that of the sixth embodiment is redundant and thus omitted.

[0247] (groove or step)

[0248] In the display device 10 according to the ninth embodiment, the groove or the step is formed in the inorganic insulating layer 12. Fig.15 In the example of FIG. 1 , the groove 27A is formed in the inorganic insulating layer 12. When the thickness direction of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed below the second color filter 20. The groove 27A may also be formed in a ring shape similar to the first embodiment and the like.

[0249] (Protective layer and covering part)

[0250] exist Fig.15 In the example of FIG. 1 , the protective layer 16 has a multilayer structure in which a first protective layer 16A and a second protective layer 16B are stacked. The covering portion 160 of the protective layer 16 includes a portion having a multilayer structure of the first protective layer 16A and the second protective layer 16B and a portion including the second protective layer 16B (in the Fig.15 The covering portion 160 covers the wall portion 127 (the first wall portion 127A and the second wall portion 127B) and the bottom surface 128 of the groove 27A. Fig.15In the example of , the portion 132 of the cover 160 including the second protective layer 16B is formed to contact the first wall portion 127A along the first wall portion 127A of the groove 27A. However, this is an example, and the portion 132 may be formed in a portion of the cover 160 that covers the second wall portion 127B and the bottom surface 128. In the display device 10, a recessed structure is formed on the upper surface side (first surface side) of the cover 160, and an upper space 161 is formed inside the recessed structure. Note that the opening of the upper space 161 is covered by the first planarization layer 24.

[0251] (Auxiliary Electrode)

[0252] In the display device 10 according to the ninth embodiment, the auxiliary electrode 26 is formed in a region (region on the −X direction side) closer to the display region 10A than the groove 27A. Fig.15 As shown, the auxiliary electrode 26 may extend to the upper end edge of the groove 27A. This is not limited to the ninth embodiment, and is similarly applied to other embodiments. In this case, the auxiliary electrode 26 preferably has a light shielding property. Because the auxiliary electrode 26 has a light shielding property and extends to the groove 27A, the auxiliary electrode 26 can be used as an eaves portion that inhibits light from entering the inorganic insulating layer 12.

[0253] [10. Tenth embodiment]

[0254] like Fig.16 As shown, in the display device 10 according to the tenth embodiment, the groove 27A is formed outside the second color filter 20 . Fig.16 10 is a cross-sectional view schematically showing an example of the display device 10 according to the tenth embodiment. Fig.16 The example of the display device 10 of the tenth embodiment shown in FIG. 1 is similar to the sixth embodiment. Hereinafter, the description of the configuration similar to that of the sixth embodiment is redundant and thus will be omitted.

[0255] (groove or step)

[0256] In the display device 10 according to the tenth embodiment, the groove or the step is formed in the inorganic insulating layer 12. Fig.16 In the example of , the groove 27A is formed in the inorganic insulating layer 12. In the case where the thickness direction of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed outside the second color filter 20 (at a predetermined position in the outer region 10B). However, the groove 27A is formed at a position closer to the display region 10A than the proximal end 40A of the inclined portion 40 formed in the sealing substrate 22. The groove 27A may also be formed in a ring shape similar to the first embodiment and the like.

[0257] (Protective layer)

[0258] exist Fig.16 In the example of FIG. 1 , the protective layer 16 has a multilayer structure in which a first protective layer 16A and a second protective layer 16B are stacked. The first protective layer 16A is formed in the display region 10A and the external region 10B, and the position of the outer end surface 162 of the first protective layer 16A is the position outside the groove 27A ( Fig.16 The position of the outer end surface 163 of the second protective layer 16B is a predetermined position closer to the display area 10A than the groove 27A ( Fig.16 The outer end surface 163 of the second protective layer 16B is covered with a sealing layer 29 described later.

[0259] (Overlay)

[0260] The covering portion 160 of the protective layer 16 includes the first protective layer 16A. The covering portion 160 contacts the wall portion 127 and the bottom surface 128 of the groove portion 27A, and covers the wall portion 127 and the bottom surface 128. In the display device 10, a recessed structure as the second height difference portion 134 is formed on the upper surface side (first surface side) of the covering portion 160, and an upper space 161 is formed inside the recessed structure.

[0261] (Sealing layer)

[0262] On the color filter 18, a sealing layer 29 is formed between the light emitting element substrate 103 and the sealing substrate 22. The sealing layer 29 is preferably formed to substantially cover the outer region 10B in a plan view of the light emitting element substrate 103. Fig.16 In the example of , the sealing layer 29 is formed to cover the second planarization layer 25. In addition, the sealing layer 29 is formed to cover the first protective layer 16A in the outer region 10B, is formed to cover the upper surface side of the second height difference portion 134 (formed in the covering portion 160 covering the groove 27A), and is formed to fill the upper space 161.

[0263] (End surface coating)

[0264] The end surface coating portion 42 covers the end surface 164 of the sealing layer 29 and the outer end surface 162 of the first protective layer 16A.

[0265] In the display device 10 according to the tenth embodiment, the protective layer 16 is formed along the wall portion 127 and the bottom surface 128 of the groove 27A, and the area of ​​the contact interface between the protective layer 16 and the inorganic insulating layer 12 is increased. Therefore, it is difficult for moisture to enter the display region 10A through the inside of the protective layer 16.

[0266] In addition, according to the display device 10 of the tenth embodiment, the upper space 161 is filled with the sealing layer 29. Since the sealing layer 29 often contains a material having excellent adhesion, the adhesion between the first protective layer 16A and the sealing layer 29 is further enhanced. In addition, since the upper space 161 is filled with the sealing layer 29, the area of ​​the interface between the protective layer 16 and the sealing layer 29 at the position of the cover 160 increases (extending the moisture entry path). Therefore, it is possible to make it less likely that moisture enters the display region 10A along the interface between the protective layer 16 and the sealing layer 29, and even if moisture enters from the interface between the protective layer and the sealing layer, it is possible to make it less likely that moisture reaches the display region along the interface.

[0267] [11 Eleventh Embodiment]

[0268] In the display device according to the eleventh embodiment, as Fig.17 As shown, the groove 27A is formed at a predetermined position outside the second color filter 20 , and a portion (portion 129A) of the groove 27A is filled with the end face coating portion 42 . Fig.17 10 is a cross-sectional view schematically showing an example of the display device 10 according to the eleventh embodiment. Fig.17 The example of the display device 10 of the eleventh embodiment shown in FIG. 1 is similar to the sixth embodiment. Hereinafter, the description of the configuration similar to that of the sixth embodiment is redundant and thus will be omitted.

[0269] (groove or step)

[0270] In the display device 10 according to the eleventh embodiment, a groove or a step is formed in the inorganic insulating layer 12. Fig.17 In the example of , the groove 27A is formed in the inorganic insulating layer 12. In the case where the thickness direction of the light emitting element substrate 103 is the line of sight direction, the groove 27A is formed outside the second color filter 20. In addition, in the case where the Z-axis direction is the line of sight direction, the proximal end 40A of the inclined portion 40 formed on the sealing substrate 22 is located on the bottom surface 128 of the groove 27A. The groove 27A may also be formed in a ring shape similar to the first embodiment and the like.

[0271] (Protective layer)

[0272] exist Fig.17In the example of , the protective layer 16 has a multilayer structure in which a first protective layer 16A and a second protective layer 16B are stacked. The first protective layer 16A is formed in the display area 10A and the external area 10B. When the Z-axis direction is the line of sight direction, the position of the outer end surface 162 of the first protective layer 16A is the position in the bottom surface 128 of the groove 27A. The second protective layer is formed so that the position of its outer end surface 163 is located at a predetermined position on the display area 10A side relative to the groove 27A. The outer end surface 163 of the second protective layer 16B is covered by a sealing layer 29 described later.

[0273] (covering part)

[0274] The covering portion 160 of the protective layer 16 includes the first protective layer 16A. The covering portion 160 covers the wall portion 127 (first wall portion 127A) of the groove 27A and a portion of the bottom surface 128. In the display device 10, a step structure is formed on the upper surface side (first surface side) of the covering portion 160, and an upper space 161 is formed at the position of the step structure.

[0275] (Sealing layer)

[0276] The sealing layer 29 is formed on the color filter 18. The sealing layer 29 is preferably formed in a region covering the second planarizing layer 25 in a plan view of the light emitting element substrate 103. Figure 2 In the example of , the sealing layer 29 is formed to cover the second planarizing layer 25. In addition, the sealing layer 29 is formed to fill the upper space 161 on the upper surface side of the cover portion 160 formed above the groove 27A.

[0277] (End surface coating)

[0278] The end surface coating portion 42 covers the end surface 164 of the sealing layer 29 and the outer end surface 162 of the first protective layer 16A. In addition, the end surface coating portion 42 fills the groove 27A together with the first protective layer 16A (fills a part of the groove inner space 129 (part 129A)). The end surface coating portion 42 covers a part of the bottom surface 128 of the groove 27A and the second wall portion 127B and fills the part 129A.

[0279] According to the display device 10 of the eleventh embodiment, the first wall portion 127A and a portion of the bottom surface 128 of the groove 27A are covered by the first protective layer 16A, and the moisture entry path is extended when moisture enters the interior along the first protective layer 16A. In addition, in the display device 10 according to the eleventh embodiment, the outer end surface 162 of the first protective layer 16A is covered by the end surface coating portion 42. Since the end surface coating portion 42 often contains a material having excellent adhesion, the end surface coating portion 42 can effectively block moisture from entering from the first protective layer 16A toward the display area 10A.

[0280] [12 Example case where the display device has a resonator structure]

[0281] Now, a case where a resonator structure is formed in the display device 10 is described, taking the display device 10 according to the first embodiment as an example. In the display device 10 according to the first embodiment, the resonator structure may also be formed in at least some of the plurality of sub-pixels 101. Note that the resonator structure described in conjunction with the first embodiment may be applied to the second to eleventh embodiments.

[0282] (Resonator Structure)

[0283] A resonator structure is formed in the display device 10. The resonator structure is a cavity structure, and is a structure that causes resonance of light generated in the organic layer 14. In the display device 10, the resonator structure is formed in the light emitting elements 104 (light emitting elements 104R, 104B, and 104G), and each resonator structure includes a first electrode 13, an organic layer 14, and a second electrode 15. Causing resonance of light emitted from the organic layer 14 means causing resonance of light of a specific wavelength included in the emitted light.

[0284] In the resonator structure, in the emission light from the organic layer 14, a component reflected and resonated between predetermined layers such as between the first electrode 13 and the second electrode 15 is enhanced, and the enhanced light is emitted toward the outside from the display surface D side (first surface side).

[0285] The organic layer 14 generally uses light of a color type corresponding to the sub-pixel 101 as the emitted light, and the resonator structure causes the resonance of light of a specific wavelength included in the emitted light from the organic layer 14. At this time, the light of a predetermined wavelength in the emitted light from the organic layer 14 is strengthened. Then, the light of the predetermined wavelength that is strengthened is then emitted outward from the second electrode 15 side (i.e., the light emitting surface side) of the light emitting element 104. Note that the light of the predetermined wavelength is light corresponding to a predetermined color type, and represents light corresponding to a color type determined according to the sub-pixel 101. The display device 10 includes light emitting elements 104R, 104G, and 104B corresponding to the sub-pixels 101R, 101G, and 101B. In addition, a resonator structure is formed for each light emitting element 104R, 104G, and 104B. In the resonator structure in the sub-pixel 101R, the red light of the light emitted from the organic layer 14 resonates. The light is emitted toward the outside from the second electrode 15 of the light emitting element 104R, wherein the red light is strengthened. Therefore, red light with excellent color purity can be emitted from the sub-pixel 101R. In the resonator structure in the sub-pixels 101G and 101B, the green light and the blue light of the emitted light from the organic layer 14 resonate respectively. In the sub-pixels 101G and 101B, light is emitted outward from the second electrode 15 of the light-emitting elements 104G and 104B, in which the green light and the blue light are strengthened. Therefore, green light and blue light with excellent color purity can be emitted from the sub-pixels 101G and 101B, respectively.

[0286] Since the resonator structure is formed in the display device 10 in this manner, the color purity of the sub-pixel 101 can be improved.

[0287] First to seventh examples will be sequentially described below as example cases where the display device 10 has a resonator structure, and the description will be continued.

[0288] (Resonator Structure: First Example)

[0289] Fig.18 A is a schematic cross-sectional view for explaining a first example in the case where the display device 10 has a resonator structure.

[0290] In the first example, the thickness of the first electrode 13 and the thickness of the second electrode 15 are uniform among the sub-pixels 101R, 101G, and 101B.

[0291] In each of the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B), the optical adjustment layer 31 is provided on the lower side (second surface side) of the first electrode 13, the reflector 30 is also provided on the second surface side of the optical adjustment layer 31, and the optical adjustment layer 31 is formed between the reflector 30 and the first electrode 13. A resonator structure that causes resonance of light generated by the organic layer 14 is formed between the reflector 30 and the second electrode 15.

[0292] The thickness of the reflector 30 is the same among the sub-pixels 101R, 101G, and 101B. The thickness of the optical adjustment layer 31 varies among the sub-pixels 101R, 101G, and 101B. Since the optical adjustment layer 31 has a thickness that varies among the sub-pixels 101R, 101G, and 101B, an optical distance for causing resonance suitable for the sub-pixels 101R, 101G, and 101B can be set.

[0293] exist Fig.18 In the example of FIG. 1A, the positions of the first surfaces of the reflectors 30 provided in the sub-pixels 101R, 101G, and 101B are arranged to be aligned in the up-down direction. In the sub-pixels 101R, 101G, and 101B, the positions of the first surfaces of the second electrodes 15 vary with the thickness difference between the optical adjustment layers 31.

[0294] The reflector 30 may include a metal such as aluminum (Al), silver (Ag), or copper (Cu), or an alloy including these metals as a main component.

[0295] The optical adjustment layer 31 may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx) or silicon oxynitride (SiOxNy), or an organic resin material such as acrylic resin or polyimide resin. Each optical adjustment layer 31 may be a single layer, or may be a film stack including a plurality of materials.

[0296] Each second electrode 15 is preferably a layer used as a semi-transmissive reflective film. The second electrode 15 may contain magnesium (Mg), silver (Ag), a magnesium-silver alloy (MgAg) containing these materials as a main component, an alloy containing an alkali metal or an alkaline earth metal, etc. The configuration of the first electrode 13 and the organic layer 14 is similar to that described above, and therefore, it will not be explained here.

[0297] (Resonator Structure: Second Example)

[0298] Fig.18 B is a schematic cross-sectional view for explaining a second example in the case where the display device 10 has a resonator structure. The second embodiment has a layer structure similar to that of the first embodiment, except that the positions of the second electrode 15 and the reflector 30 are different from those of the first embodiment.

[0299] In the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B), the upper surfaces of the second electrodes 15 are arranged so that their positions in the vertical direction are aligned. According to the thickness difference between the optical adjustment layer 31, the reflectors 30 provided in the sub-pixels 101R, 101G, and 101B are located at different positions in the vertical direction.

[0300] (Resonator Structure: Third Example)

[0301] Fig.19 A is a schematic cross-sectional view for explaining a third example in the case where the display device 10 has a resonator structure. The third example has a layer structure similar to the first example except that the thickness of the reflector 30 varies between the sub-pixels 101R, 101G, and 101B (light emitting elements 104R, 104G, and 104B).

[0302] In the sub-pixels 101R, 101G, and 101B, the upper surfaces of the second electrodes 15 are arranged so that their positions in the vertical direction are aligned. The positions of the first surfaces of the reflectors 30 provided in the sub-pixels 101R, 101G, and 101B vary in the vertical direction according to the thickness difference between the optical adjustment layers 31. However, the positions of the second surfaces of the reflectors 30 are aligned between the sub-pixels 101R, 101G, and 101B.

[0303] (Resonator Structure: Fourth Example)

[0304] Fig.19 B is a schematic cross-sectional view for explaining a fourth example in the case where the display device 10 has a resonator structure. The fourth example is similar to the first example except that the optical adjustment layer 31 is not included and the thickness of the first electrode 13 varies between the sub-pixels 101R, 101G, and 101B (light-emitting elements 104R, 104G, and 104B).

[0305] Regarding the thickness of the first electrode 13 , the respective thicknesses of the first electrode 13 are designed to set an optical distance for causing optical resonance suitable for the sub-pixels 101R, 101G, and 101B.

[0306] (Resonator Structure: Fifth Example)

[0307] Fig. 20 A is a schematic cross-sectional view for explaining a fifth example in the case where the display device 10 has a resonator structure. The fifth example is similar to the first example except that the optical adjustment layer 31 is not included and an oxide film 32 is formed on the first surface side of the reflector 30 (the side facing the surface of the first electrode 13).

[0308] The thickness of the oxide film 32 varies among the sub-pixels 101R, 101G, and 101B (the light emitting elements 104R, 104G, and 104B).

[0309] Regarding the thickness of the oxide film 32 , the respective thicknesses of the oxide film 32 are designed to set an optical distance for causing optical resonance suitable for the sub-pixels 101R, 101G, and 101B.

[0310] The oxide film 32 is a film obtained by oxidizing the surface of the reflector 30 and contains, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. The oxide film 32 functions as an insulating film for adjusting the optical path length (optical distance) between the reflector 30 and the second electrode 15 .

[0311] For example, the oxide film 32 having a thickness suitable for the sub-pixels 101R, 101G, and 101B may be formed in the following manner.

[0312] First, the substrate on which the reflector 30 is formed is immersed in a container filled with an electrolyte, and an electrode is disposed to face the reflector 30 .

[0313] Then, using this electrode as a reference, a positive voltage is applied to the reflector 30 to anodize the reflector 30. A voltage corresponding to the thickness of the oxide film 32 to be obtained is applied to the reflectors 30 of the sub-pixels 101R, 101G, and 101B. Therefore, oxide films 32 having different thicknesses (oxide films 32 having thicknesses suitable for the sub-pixels 101R, 101G, and 101B) can be formed together on the reflectors 30 of the sub-pixels 101R, 101G, and 101B.

[0314] (Resonator Structure: Sixth Example)

[0315] Fig. 20 B is a schematic cross-sectional view for explaining a sixth example in the case where the display device 10 has a resonator structure.

[0316] In the sixth example, each resonator structure of the display device 10 includes a structure in which a first electrode 13, an organic layer 14, and a second electrode 15 are stacked. In the sixth example, each first electrode 13 is a first electrode (also used as a reflector) 33 designed to function as an electrode and a reflector. The first electrode (also used as a reflector) 33 includes a material having an optical constant selected according to the type of the light emitting elements 104R, 104G, and 104B. Since the phase shift of the first electrode (also used as a reflector) 33 varies, an optical distance for generating an optimal resonance corresponding to the wavelength of light of a color to be displayed can be set.

[0317] The first electrode (also used as a reflector) 33 may include a single component metal such as aluminum (Al), silver (Ag), gold (Au) or copper (Cu), or an alloy including these metals as a main component. For example, the first electrode (also used as a reflector) 33R of the sub-pixel 101R may include copper (Cu), and the first electrode (also used as a reflector) 33G of the sub-pixel 101G and the first electrode (also used as a reflector) 33B of the sub-pixel 101B may include aluminum.

[0318] The second electrode 15 and the organic layer 14 are similar to those of the first example, and therefore, they are not explained here.

[0319] (Resonator Structure: Seventh Example)

[0320] Fig.21 is a schematic cross-sectional view for explaining a seventh example in the case where the display device 10 has a resonator structure.

[0321] In the seventh example, the resonator structure shown in the sixth example is provided to the sub-pixels 101R and 101G (light emitting elements 104R and 104G), and the resonator structure shown in the first example is provided to the sub-pixel 101B (light emitting element 104B).

[0322] [13 Example of positional relationship in a case where the display device includes a wavelength selection unit]

[0323] As the positional relationship in the case where the wavelength selection unit is formed in the display device 10, the mutual positional relationship between the light emitting unit, the lens member, and the wavelength selection unit is described, wherein the display device 10 according to the first embodiment is used as an example. The display device 10 according to the first embodiment includes a color filter as the wavelength selection unit. Note that [the example of the positional relationship in the case where the display device includes the wavelength selection unit] can be applied to each embodiment (the second to the eleventh embodiment) including a color filter and a lens layer.

[0324] (Color filter and lens layer)

[0325] In the display device 10 shown in the first embodiment, as Figure 1 C, in each sub-pixel 101, a wavelength selection unit and a lens member are arranged on the first surface side of the planarization layer 23. In the example shown in the first embodiment, the wavelength selection unit is a color filter 18 (first color filter 19). For example, in the first embodiment, as the first color filter 19, a red color filter 19R, a green color filter 19G and a blue color filter 19B are arranged for sub-pixels 101R, 101G and 101B respectively. At this time, the light absorption layer is preferably arranged between adjacent first color filters 19. Examples of the light absorption layer include a black matrix portion. In addition, in the third embodiment, a second planarization layer 25 is formed on the color filter 18. The lens 21 arranged on the second planarization layer 25 is arranged as a lens member.

[0326] (Relationship between normal lines extending through centers of light emitting unit, lens member, and wavelength selection unit)

[0327] In the following description, the relationship between the normal line LN extending through the center of the light emitting unit, the normal line LN′ extending through the center of the lens member, and the normal line LN″ extending through the center of the wavelength selection unit is described. Here, the light emitting unit is, for example, a light emitting portion of the light emitting element 104. For example, the lens member is the lens 21. The wavelength selection unit is, for example, a red filter 19R, a green filter 19G, and a blue filter 19B.

[0328] It should be noted that the size of the wavelength selection unit can be appropriately changed according to the light emitted from the light emitting unit, or in the case where the light absorbing unit (e.g., black matrix portion) is provided between the wavelength selection units adjacent to the light emitting unit, the size of the light absorbing unit can be appropriately changed according to the light emitted from the light emitting unit. In addition, the size of each wavelength selection unit can be appropriately changed according to the distance (offset) d0 between the normal line extending through the center of the light emitting unit and the normal line extending through the center of the wavelength selection unit. The planar shape of each wavelength selection unit can be the same as, similar to, or different from the planar shape of each lens member.

[0329] In the following description, reference is made to Fig. 22 A. Fig. 22 B. Fig. 22 C and Fig.23 , will be described in the light emitting unit 51 (corresponding to Figure 2 The relationship between normal lines extending through the centers of the respective members when the light emitting portion of the light emitting element 104 in the example of ), the wavelength selection unit 52, and the lens member 53 are arranged in this order.

[0330] like Fig. 22 As shown in A, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 may be consistent with each other. That is, D0=0 and d0=0 may be satisfied. Here, D0 represents the distance (offset) between the normal line LN extending through the center of the light emitting unit 51 and the normal line LN' extending through the center of the lens member 53, and d0 represents the distance (offset) between the normal line LN extending through the center of the light emitting unit 51 and the normal line LN" extending through the center of the wavelength selection unit 52.

[0331] like Fig. 22 B, the normal line LN extending through the center of the light emitting unit 51 and the normal line LN" extending through the center of the wavelength selection unit 52 may be consistent with each other, but the normal line LN extending through the center of the light emitting unit 51 and the normal line LN" extending through the center of the wavelength selection unit 52 may not be consistent with the normal line LN' extending through the center of the lens member 53. That is, D0>0 and d0=0 may be satisfied.

[0332] like Fig. 22 C, the normal line LN extending through the center of the light emitting unit 51 may not coincide with the normal line LN" extending through the center of the wavelength selection unit 52 and the normal line LN' extending through the center of the lens member 53, and the normal line LN" extending through the center of the wavelength selection unit 52 may coincide with the normal line LN' extending through the center of the lens member 53. That is, D0>0, d0>0 and D0=d0 may be satisfied.

[0333] like Fig.23 As shown, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 may not coincide with each other. That is, D0>0, d0>0, and D0≠d0 may be satisfied. Here, the center of the wavelength selection unit 52 ( Fig.23 The position indicated by the black square in FIG. 5 is preferably located on the straight line LL connecting the center of the light emitting unit 51 and the center of the lens member 53 (indicated by Fig.23 Specifically, between the center of the light emitting unit 51 and the center of the wavelength selection unit 52 in the thickness direction ( Fig.23 In the case where the distance in the vertical direction in the wavelength selection unit 52 is represented by LL1, and the distance between the center of the wavelength selection unit 52 and the center of the lens member 53 in the thickness direction is represented by LL2,

[0334] Preferably the following expression is satisfied,

[0335] D0>d0>0

[0336] And, in consideration of manufacturing variations, the following expression is preferably satisfied,

[0337] d0:D0=LL1:(LL1+LL2)

[0338] Here, the thickness direction indicates the thickness direction of the light emitting unit 51 , the wavelength selecting unit 52 , and the lens member 53 .

[0339] In the following, reference is made to Fig.24 A. Fig.24 B and Fig.25 , the relationship of the normal line passing through the center of each portion in a case where the light emitting unit 51, the lens member 53, and the wavelength selecting unit 52 are arranged in this order will be described.

[0340] like Fig.24 As shown in FIG. 4A , a normal line LN passing through the center of the light emitting unit 51, a normal line LN″ passing through the center of the wavelength selection unit 52, and a normal line LN′ passing through the center of the lens member 53 may coincide with each other. That is, D0>0 and d0=0 may be satisfied.

[0341] like Fig.24 B, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 do not coincide with each other, and the normal line LN" passing through the center of the wavelength selection unit 52 and the normal line LN' passing through the center of the lens member 53 may coincide with each other. That is, D0>0, d0>0 and D0=d0 may be satisfied.

[0342] like Fig.25 As shown, the normal line LN passing through the center of the light emitting unit 51, the normal line LN" passing through the center of the wavelength selection unit 52, and the normal line LN' passing through the center of the lens member 53 may not coincide with each other. Here, the center of the lens member 53 (at Fig.25 The position indicated by the black circle in FIG. 5 is preferably located at the center of the connecting light emitting unit 51 and the center of the wavelength selection unit 52 (at Fig.25 Specifically, between the center of the light emitting unit 51 and the center of the lens member 53 in the thickness direction ( Fig.25 In the case where the distance in the vertical direction (in the vertical direction) is represented by LL2, and the distance in the thickness direction between the center of the lens member 53 and the center of the wavelength selection unit 52 is represented by LL1,

[0343] Preferably the following expression is satisfied,

[0344] d0>D0>0

[0345] And, in consideration of manufacturing variations, the following expression is preferably satisfied,

[0346] D0:d0=LL2:(LL1+LL2)

[0347] Here, the thickness direction indicates the thickness direction of the light emitting unit 51 , the wavelength selecting unit 52 , and the lens member 53 .

[0348] [14 Application Examples]

[0349] (Electronic equipment)

[0350] The display device 10 according to the above-mentioned embodiment can be provided in various electronic devices. In particular, the display device is preferably provided in a device requiring high image resolution and used near the eye for viewing in a magnified state, and the device includes an electronic viewfinder of a camera or a single-lens reflex camera, a head-mounted display, etc. The display device 10 according to the above-mentioned embodiment includes all the display devices described in the first embodiment to the eleventh embodiment and the modified example, the display device in the case of having a resonator structure, and the display device described in the example of the positional relationship in the case of having a wavelength selection unit.

[0351] (Specific example 1)

[0352] Fig.26 A is a front view showing an example of the appearance of the digital camera 310 . Fig.26 B is a rear view showing an example of the appearance of a digital camera 310. The digital camera 310 is a single-lens reflex type of an interchangeable lens, and includes an interchangeable imaging lens unit (interchangeable lens) 312 located approximately at the center of the front surface of a camera body (camera body) 311 and a grip 313 to be held by a photographer on the front left side.

[0353] The monitor 314 is provided at a position offset to the left from the center of the rear surface of the camera body 311. An electronic viewfinder (eyepiece window) 315 is provided above the monitor 314. By observing through the electronic viewfinder 315, the photographer can visually recognize the optical image of the subject guided from the imaging lens unit 312 and determine the picture composition. As the electronic viewfinder 315, the display device 10 according to any one of the above-described embodiments can be used.

[0354] (Specific Example 2)

[0355] Fig. 27 3 is a perspective view showing an example of the appearance of the head mounted display 320. For example, the head mounted display 320 includes ear hook portions 322 worn on the user's head on both sides of a display unit 321 in the shape of glasses. As the display unit 321, the display device 10 according to any one of the above-described embodiments and their modified examples can be used.

[0356] (Specific example 3)

[0357] Fig.28 3 is a perspective view showing an example of the appearance of a television device 330. For example, the television device 330 includes a video display screen unit 331 including a front panel 332 and a filter 333, and the video display screen unit 331 includes the display device 10 according to any one of the above-described embodiments and their modified examples.

[0358] (Specific example 4)

[0359] Fig.29 An example of the appearance of a see-through head-mounted display 340 is shown. The see-through head-mounted display 340 includes a main body 341 , an arm 342 , and a lens barrel 343 .

[0360] The body 341 is connected to the arm 342 and the glasses 350. Specifically, the end of the body 341 in the longitudinal direction is coupled to the arm 342, and one side of the side surface of the body 341 is coupled to the glasses 350 via a connecting member. Note that the body 341 may be directly mounted on the head of a human body.

[0361] The main body 341 includes a control panel and a display unit for controlling the operation of the see-through head mounted display 340. The arm 342 connects the main body 341 and the lens barrel 343, and supports the lens barrel 343. Specifically, the arm 342 is coupled to the end of the main body 341 and the end of the lens barrel 343, and fixes the lens barrel 343. In addition, the arm 342 includes a signal line for transmitting data related to an image to be provided from the main body 341 to the lens barrel 343.

[0362] The lens barrel 343 projects image light supplied from the main body 341 via the arm 342 to the eyes of the user wearing the see-through head-mounted display 340 through the eyepiece 351. In this see-through head-mounted display 340, the display unit of the main body 341 includes any of the above-described display device 10 and the like.

[0363] (Specific Example 5)

[0364] Fig.30 33 is a perspective view showing an example of the appearance of a smartphone 360. As shown in FIG33 , the smartphone 360 ​​includes a display unit 361 that displays information about pixels and the like, and an operation unit 362 that includes buttons and the like for receiving operation inputs from a user. The display device 10 according to the above-described embodiment and modified example can be adopted as the display unit 361.

[0365] (Specific Example 6)

[0366] Any of the display devices 10 and the like described above may be included in a vehicle or in various displays.

[0367] Fig.31 31A and 31B are diagrams showing examples of the interior configuration of a vehicle 500 provided with various displays. Specifically, Fig.31 A is a diagram showing an example of the interior state of the vehicle 500 viewed from the rear side to the front side of the vehicle 500 . Fig.31 B is a diagram showing an example of the interior state of the vehicle 500 viewed obliquely from the rear side to the front side of the vehicle 500.

[0368] The vehicle 500 includes a central display 501, a console display 502, a head-up display 503, a digital rearview mirror 504, a steering wheel display 505, and a rear entertainment display 506. At least one of these displays includes any one of the above-mentioned display devices 10, etc. For example, all of these displays may include one of the above-mentioned display devices 10, etc.

[0369] The central display 501 is arranged on the instrument panel at a position facing the driver's seat 508 and the passenger seat 509 . Fig.31 A and Fig.31B shows an example of a central display 501 having a horizontally long shape extending from the side of the driver's seat 508 to the side of the passenger seat 509, but any screen size and installation position for the central display 501 may be adopted. The central display 501 is capable of displaying information sensed by various sensors. As a specific example, the central display 501 may display an image captured by an image sensor, an image of the distance to obstacles in front of or to the side of the vehicle 500, a distance measured by a ToF sensor, a body temperature of a pedestrian detected by an infrared sensor, and the like. The central display 501 may be used to display, for example, at least one of safety-related information, operation-related information, a life-saving log, health-related information, authentication / identification-related information, or entertainment-related information.

[0370] Safety-related information is information about drowsiness sensing, averted gaze sensing, sensing of mischief of children riding together, presence or absence of wearing of seat belts, sensing of departure of passengers, etc., and is information sensed by, for example, a sensor set to overlap with the rear surface side of the central display 501. Operation-related information uses a sensor to sense gestures related to operations performed by passengers. The gestures to be sensed may include operations of various facilities in the vehicle 500. For example, operations of air conditioning facilities, navigation devices, audio-visual (AV) devices, lighting devices, etc. are detected. The life-saving log includes life-saving logs of all passengers. For example, the life-saving log includes a record of actions of each passenger in the vehicle. By acquiring and storing the life-saving log, the state of each passenger at the time of the accident can be checked. Health-related information uses a sensor such as a temperature sensor to sense the body temperature of the passenger, and estimates the health status of the passenger based on the sensed body temperature. Alternatively, the face of the passenger can be imaged with an image sensor, and the health status of the passenger can be estimated based on the imaged facial expression. In addition, a conversation can be conducted with the passenger with an automatic voice, and the health status of the passenger can be estimated based on the content of the response from the passenger. Authentication / recognition related information includes a keyless entry function that uses sensors to perform facial authentication, and a function that automatically adjusts seat height and position through facial recognition. Entertainment related information includes a function that uses sensors to detect operating information about an AV device used by an occupant, and a function that uses sensors to recognize an occupant's face and provides content suitable for the occupant through the AV device.

[0371] For example, the console display 502 may be used to display lifelog information. The console display 502 is disposed near a shift lever 511 of a center console 510 between a driver's seat 508 and a passenger seat 509. The console display 502 may also display information detected by various sensors. In addition, the console display 502 may display an image of the vehicle's surroundings captured by an image sensor, or may display an image of the distance to obstacles present in the vehicle's surroundings.

[0372] The head-up display 503 is virtually displayed behind the windshield 512 in front of the driver's seat 508. For example, the head-up display 503 can be used to display at least one of safety-related information, operation-related information, a life-saving log, health-related information, authentication / identification-related information, or entertainment-related information. In many cases, the head-up display 503 is virtually set in front of the driver's seat 508 and is suitable for displaying information directly related to the operation of the vehicle 500, such as the speed of the vehicle 500, the remaining amount of fuel (battery), etc.

[0373] The digital rearview mirror 504 can display not only the rear of the vehicle 500 but also the status of rear seat occupants, and therefore, for example, can be used to display life-saving log information by arranging sensors on the back side of the digital rearview mirror 504 in an overlapping manner.

[0374] The steering wheel display 505 is arranged near the center of the steering wheel 513 of the vehicle 500. The steering wheel display 505 can be used to display, for example, at least one of safety-related information, operation-related information, life-saving log, health-related information, authentication / identification-related information, or entertainment-related information. In particular, the steering wheel display 505 is located close to the driver's hand and is suitable for displaying life-saving log information such as the driver's body temperature, or is suitable for displaying information about the operation of AV devices, air conditioning facilities, etc.

[0375] The rear entertainment display 506 is attached to the rear side of the driver's seat 508 or the passenger seat 509 and is used to allow the occupants in the rear seats to enjoy watching / listening. The rear entertainment display 506 can be used to display, for example, at least one of safety-related information, operation-related information, a life-saving log, health-related information, authentication / identification-related information, or entertainment-related information. In particular, when the rear entertainment display 506 is located in front of the occupants in the rear seats, information related to the occupants in the rear seats is displayed. For example, information about the operation of an AV device or an air conditioning facility can be displayed, or the measurement results of the body temperature of the occupants in the rear seats with a temperature sensor can be displayed, etc.

[0376] The sensor can be arranged on the rear surface side of the display device 10, etc. in an overlapping manner, so that the distance to the object present in the surrounding environment can be measured in this configuration. Optical distance measurement methods are roughly divided into passive and active types. By the passive method, distance measurement is performed by receiving light from the object without projecting light from the sensor to the object. Passive methods include lens focusing methods, stereo methods, and monocular vision methods. Active methods include distance measurement performed by projecting light onto an object, and using a sensor to receive reflected light from an object to measure the distance. Active methods include optical radar methods, active stereo methods, illumination difference stereo methods, moiré morphology methods, and interference methods. Any of the above-mentioned display devices 10, etc. can be used for distance measurement by any of these methods. By arranging the sensor on the rear surface side of the above-mentioned display device 10, etc. in an overlapping manner, the above-mentioned passive or active distance measurement can be performed.

[0377] Although the display devices and application examples according to the first to eleventh embodiments and various modified examples of the present disclosure have been described in detail above, the present disclosure is not limited to the display devices and application examples according to the above-mentioned first to seventh embodiments and various modified examples, and various modifications can be made based on the technical concepts of the present disclosure.

[0378] For example, the configurations, methods, steps, shapes, materials, numerical values, etc. given in the display devices and application examples according to the above-mentioned first to eleventh embodiments and the above-mentioned variations are merely examples, and different configurations, methods, steps, shapes, materials, numerical values, etc. can be used as needed.

[0379] The configurations, methods, steps, shapes, materials, numerical values, and the like of the display devices and application examples according to the above-described first to eleventh embodiments and each modification example may be combined with one another without departing from the gist of the present disclosure.

[0380] The materials exemplified in the display devices and application examples according to the above-described first to eleventh embodiments and respective modifications may be used alone or in combination of two or more, unless otherwise specified.

[0381] Furthermore, the present disclosure may also adopt the following configurations.

[0382] (1) A display device comprising:

[0383] A light emitting element substrate, wherein an inorganic insulating layer and a light emitting element are sequentially formed on the substrate; and

[0384] A protective layer covers the upper surface side of the light emitting element substrate, wherein

[0385] The protective layer is provided with a planarization layer and a functional layer different from the planarization layer on an upper side of the protective layer, the inorganic insulating layer has at least one of a groove and a step, and

[0386] The protection layer includes a covering portion covering at least a portion of the groove or the step.

[0387] (2) The display device according to (1), comprising: a display area defined as an area where light generated by the light emitting element is emitted; and an outer area defined as an area outside an outer edge of the display area, wherein

[0388] The inorganic insulating layer has a groove or a step at a position corresponding to the outer region.

[0389] (3) The display device according to (1) or (2), wherein:

[0390] At least a portion of the groove or the step is formed below the planarization layer or the functional layer.

[0391] (4) The display device according to any one of (1) to (3), further comprising:

[0392] A sealing substrate, wherein

[0393] A planarization layer and a functional layer are formed between the protective layer and the sealing substrate, and

[0394] The groove or the step is formed at a lower position of the end portion of the sealing substrate or at a position closer to the display region side than the lower position.

[0395] (5) The display device according to any one of (1) to (4), wherein:

[0396] Functional layers include color filters,

[0397] The color filter includes a first color filter and a second color filter, the light generated in the light emitting element is incident on the first color filter, the second color filter is formed outside the first color filter, and

[0398] The groove or the step is provided at a lower position of the second color filter.

[0399] (6) The display device according to (5), wherein:

[0400] The second color filter has a light shielding property.

[0401] (7) The display device according to any one of (1) to (6), wherein:

[0402] The light emitting element has a structure in which a first electrode, an organic compound layer, and a second electrode are stacked in this order.

[0403] The display device further includes an auxiliary electrode disposed in the outer region and electrically connected to the second electrode, and

[0404] The groove or the step is provided in a formation region of the auxiliary electrode.

[0405] (8) The display device according to any one of (1) to (7), wherein:

[0406] The light emitting element has a structure in which a first electrode, an organic compound layer, and a second electrode are stacked in this order.

[0407] The display device further includes an auxiliary electrode disposed in the outer region and electrically connected to the second electrode, and

[0408] The groove or the step is provided at a position closer to the display region side than the formation region of the auxiliary electrode.

[0409] (9) The display device according to any one of (1) to (8), wherein:

[0410] Connecting terminals electrically connected to external equipment are provided outside and in an outer region of the groove or step.

[0411] (10) The display device according to any one of (1) to (9), wherein:

[0412] The upper portion of the groove or step is covered with a planarization layer.

[0413] (11) The display device according to any one of (1) to (10), wherein:

[0414] A recessed structure is formed on the upper surface side of the cover portion, and

[0415] The upper portion of the recessed structure is covered with a planarization layer.

[0416] (12) The display device according to any one of (1) to (11), wherein:

[0417] The planarizing layer includes a hygroscopic member.

[0418] (13) The display device according to any one of (1) to (12), wherein:

[0419] The planarization layer includes a lower planarization layer and an upper planarization layer,

[0420] A lower planarization layer is provided in the outer region,

[0421] An upper planarization layer is disposed at least in the display region and covers the lower planarization layer, and

[0422] The groove or step is disposed below the lower planarization layer.

[0423] (14) The display device according to (13), wherein:

[0424] The lower planarizing layer includes a moisture absorbing member.

[0425] (15) The display device according to any one of (1) to (14), wherein the protective layer has a stacked structure of an inorganic layer and an organic layer.

[0426] (16) The display device according to any one of (1) to (15), further comprising: a sealing substrate, wherein

[0427] The functional layer includes a sealing layer, the sealing layer is formed between the light emitting element substrate and the sealing substrate, and in the outer region, a recessed structure is formed on the upper surface side of the cover portion, and the upper portion of the recessed structure is covered with the sealing layer

[0428] (17) An electronic device comprising:

[0429] A display device according to any one of (1) to (16).

[0430] Reference Symbols List

[0431] 1 Display panel

[0432] 10 Display device

[0433] 10A display area

[0434] 10B External Area

[0435] 11 base plate

[0436] 12 Inorganic insulation layer

[0437] 12A Opening

[0438] 13. First electrode

[0439] 14 Organic layer

[0440] 15. Second electrode

[0441] 16 Protective layer

[0442] 16A first protection layer

[0443] 16B Second protection layer

[0444] 18 Color Filters

[0445] 19 First Color Filter

[0446] 20 Second color filter

[0447] 21 Lens

[0448] 22 Sealing base plate

[0449] 23 Planarization layer

[0450] 26 auxiliary electrode

[0451] 27A groove

[0452] 27B Steps

[0453] 28 Filling layer

[0454] 29 Sealing layer

[0455] 40 inclined portion

[0456] 40A Near End

[0457] 40B Far End

[0458] 42 End surface coating

[0459] 43 Connection terminals

[0460] 101 sub-pixels

[0461] 103 Light-emitting element substrate

[0462] 104 Light-emitting elements

[0463] 105 Functional Layer

[0464] 110 Wiring

[0465] 127 Wall

[0466] 127A first wall portion

[0467] 127B Second wall

[0468] 128 Bottom

[0469] 129 Groove space

[0470] 130 Wall

[0471] 131 Bottom

[0472] 160 Covering

[0473] 161 Upper Space

[0474] 170 Cavity

[0475] 171Connection.

Claims

1. A display device, comprising: A light emitting element substrate, wherein an inorganic insulating layer and a light emitting element are sequentially formed on the substrate; and A protective layer covers the upper surface side of the light emitting element substrate, wherein: The protective layer is provided with a planarization layer and a functional layer different from the planarization layer on the upper side of the protective layer, The inorganic insulating layer has at least one of a groove and a step, and The protection layer includes a covering portion that covers at least a portion of the groove or the step.

2. The display device according to claim 1, further comprising: a display area, defined as an area where light generated by the light emitting element is emitted; and an outer area, defined as an area outside the outer edge of the display area, wherein The inorganic insulating layer has the groove or the step at a position corresponding to the outer region.

3. The display device according to claim 2, wherein: At least a portion of the groove or the step is formed below the planarization layer or the functional layer.

4. The display device according to claim 2, further comprising: A sealing substrate, wherein The planarization layer and the functional layer are formed between the protective layer and the sealing substrate, and The groove or the step is formed at a lower position of an end portion of the sealing substrate or at a position closer to the display region side than the lower position.

5. The display device according to claim 2, wherein: The functional layer includes a color filter, The color filter includes a first color filter and a second color filter, the light generated in the light emitting element is incident on the first color filter, the second color filter is formed outside the first color filter, and The groove or the step is provided at a lower position of the second color filter.

6. The display device according to claim 5, wherein: The second color filter has a light shielding property.

7. The display device according to claim 2, wherein: The light emitting element has a structure in which a first electrode, an organic compound layer, and a second electrode are sequentially stacked. The display device further includes an auxiliary electrode disposed in the outer region and electrically connected to the second electrode, and The groove or the step is provided in a formation region of the auxiliary electrode.

8. The display device according to claim 2, wherein: The light emitting element has a structure in which a first electrode, an organic compound layer, and a second electrode are sequentially stacked. The display device further includes an auxiliary electrode disposed in the outer region and electrically connected to the second electrode, and The groove or the step is provided at a position closer to the display region side than a formation region of the auxiliary electrode.

9. The display device according to claim 2, wherein: A connection terminal electrically connected to an external device is disposed outside the groove or the step and in the outer region.

10. The display device according to claim 2, wherein: An upper portion of the groove or the step is covered with the planarization layer.

11. The display device according to claim 2, wherein: A recessed structure is formed on the upper surface side of the cover portion, and The upper portion of the recessed structure is covered with the planarization layer.

12. The display device according to claim 2, wherein: The planarizing layer includes a hygroscopic member.

13. The display device according to claim 2, wherein: The planarization layer includes a lower planarization layer and an upper planarization layer, The lower planarization layer is disposed in the outer region, The upper planarization layer is disposed at least in the display area and covers the lower planarization layer, and The groove or the step is disposed below the lower planarization layer.

14. The display device according to claim 13, wherein: The lower planarizing layer includes a moisture absorbing member.

15. The display device according to claim 2, wherein: The protective layer has a structure in which an inorganic layer and an organic layer are stacked.

16. The display device according to claim 2, further comprising: A sealing substrate, wherein The functional layer comprises a sealing layer, The sealing layer is formed between the light emitting element substrate and the sealing substrate and in the outer region, A recessed structure is formed on the upper surface side of the cover portion, and The upper portion of the recessed structure is covered with the sealing layer.

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

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