Light-emitting device, display device, photoelectric conversion device, electronic device, and mobile body

Abstract

To suppress reduction in a light-emitting region while suppressing a leakage current between sub-pixels.SOLUTION: A light-emitting device includes a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel. One of the first sub-pixel, the second sub-pixel, and the third sub-pixel is adjacent to the other two sub-pixels. The plurality of sub-pixels includes a lower electrode, a bank having an opening for exposing a central portion of the lower electrode, an organic compound layer including a light-emitting layer disposed so as to cover the lower electrode and the bank, and an upper electrode disposed on the organic optical material layer. The bank of the first sub-pixel includes a first isolation structure at least partially surrounding the opening disposed on the lower electrode of the first sub-pixel. The bank of the third sub-pixel includes no isolation structure disposed so as to surround the opening of the third sub-pixel.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a light-emitting device, a display device, a photoelectric conversion device, an electronic device, and a moving body.

Background Art

[0002] An organic light-emitting element has a first electrode, a second electrode, and an organic compound layer disposed therebetween, and emits light when carriers are injected from the first electrode and the second electrode into the organic compound layer. The organic light-emitting element is a lightweight and flexible device. For high definition of a display device including an organic light-emitting element, a method using a white light-emitting organic light-emitting element and a color filter (hereinafter referred to as a white + CF method) is known. In the white + CF method, since the organic layer is formed over the entire area of the substrate, it is relatively easy to achieve high definition such as pixel size and pitch between pixels compared to a method of forming the organic layer for each color using a metal mask.

[0003] In a display device having a configuration in which an organic compound layer is shared by a plurality of organic light-emitting elements, charges supplied from the first electrode of one organic light-emitting element may be supplied to an adjacent organic light-emitting element through the organic compound layer. Such a phenomenon can be observed as a leakage current between organic light-emitting elements. In order to reduce the leakage current, various studies have been actively developed.

[0004] Patent Document 1 describes a display device having a plurality of first electrodes respectively provided for a plurality of organic EL elements, an insulating film provided between the plurality of first electrodes, an organic layer provided over the plurality of first electrodes and the insulating film, and a second electrode provided over the organic film. The organic layer and the second electrode are provided so as to be common to the plurality of organic EL elements (the plurality of first electrodes). The insulating film has a groove at a position between the plurality of organic EL elements. The organic layer includes a hole injection layer or a hole transport layer, and a light-emitting layer. The thickness of the hole injection layer or the hole transport layer in the groove is thinner than the thickness outside the groove. According to Patent Document 1, such a configuration can suppress leakage of the drive current between adjacent organic EL elements.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the configuration described in Patent Document 1, in order to form grooves in all the spaces between adjacent organic EL elements (sub-pixels), the light-emitting area becomes small. When the light-emitting area becomes small, it is necessary to increase the current density to obtain the required luminance, which may shorten the light-emitting lifetime of the organic light-emitting element.

[0007] The present invention provides an advantageous technique for suppressing the leakage current between sub-pixels and suppressing a reduction in the light-emitting area.

Means for Solving the Problems

[0008] One aspect of the present invention relates to a light-emitting device including a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein one of the first sub-pixel, the second sub-pixel, and the third sub-pixel is adjacent to the other two sub-pixels. In the light-emitting device, the plurality of sub-pixels include a lower electrode, a bank having an opening exposing a central portion of the lower electrode, an organic compound layer disposed to cover the lower electrode and the bank and including a light-emitting layer, and an upper electrode disposed on the organic compound layer. The bank of the first sub-pixel includes a first separation structure at least partially surrounding the opening disposed on the lower electrode of the first sub-pixel, and the bank of the third sub-pixel includes a separation structure disposed to surround the opening of the third sub-pixel. No, the first separation structure is arranged at a position overlapping the lower electrode of the first sub-pixel above the lower electrode of the first sub-pixel. 。

Effects of the Invention

[0009] According to the present invention, there is provided an advantageous technique for suppressing the leakage current between sub-pixels while suppressing a reduction in the light-emitting region.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims. Although a plurality of features are described in the embodiments, not all of these plurality of features are essential to the invention, and the plurality of features may be arbitrarily combined. Further, in the accompanying drawings, the same or similar configurations are denoted by the same reference numerals, and redundant descriptions are omitted.

[0012] [First Embodiment] FIG. 1 is a cross-sectional view showing a configuration example of a first sub-pixel 100, a second sub-pixel 200, and a third sub-pixel 300 of the light-emitting device 1 according to the first embodiment. The light-emitting device 1 has a plurality of sub-pixels (organic light-emitting elements), and the plurality of sub-pixels include the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300. The first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 are arranged such that one of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 is adjacent to the other two sub-pixels. The light-emitting device 1 may include a plurality of lower electrodes 102, an insulating layer 106, a functional layer (organic compound layer) 103 including a light-emitting layer, an upper electrode 104, and a protective layer 105 on a substrate 101.

[0013] The insulating layer 106 may have an opening OP that exposes the central portion of the upper surface of the lower electrode 102. From another perspective, the insulating layer 106 may be arranged to cover the peripheral portion of the upper surface of the lower electrode 102 and not cover the central portion that is the inner portion of the peripheral portion. The insulating layer 106 is also called a pixel isolation film or a bank. The insulating layer 106 may be configured to have a plurality of banks. The plurality of banks may be arranged spaced apart from each other or may be coupled to each other. The insulating layer (bank) 106 may include a groove 107 as a separation structure. The groove 107 may be arranged, for example, on the lower electrode 102, or may be arranged on the region surrounding the lower electrode 102. The insulating layer 106 may be arranged to also contact the side surface of the lower electrode 102 in addition to the peripheral portion of the upper surface of the lower electrode 102. The functional layer 103 may contact the central portion of the upper surface of the lower electrode 102 that is not covered by the insulating layer 106. The region where the lower electrode 102 and the functional layer 103 are in contact is a light-emitting region 108 that emits light by applying an electric field between the lower electrode 102 and the upper electrode 104. The functional layer 103 may be arranged to be shared by a plurality of sub-pixels. The charges supplied from the lower electrode 102 may be supplied to adjacent sub-pixels through the functional layer 103.

[0014] FIG. 2 is a plan view showing an arrangement example of a first sub-pixel 100, a second sub-pixel 200, and a third sub-pixel 300 in the light-emitting device 1 of FIG. 1. The first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 are sub-pixels that generate light in different wavelength bands. One of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 is adjacent to the other two sub-pixels. From another perspective, in the example of FIG. 2, the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 can be arranged adjacent to each other.

[0015] The insulating layer (bank) 106 of the first sub-pixel 100 may include a groove 107a arranged so as to at least partially surround the light-emitting region 108 or the opening 108 of the first sub-pixel 100. In the example of FIG. 2, the groove 107a is arranged so as to surround the light-emitting region 108 or the opening 108 of the first sub-pixel 100 over the entire circumference. The insulating layer (bank) 106 of the second sub-pixel 200 may include a groove 107b arranged so as to at least partially surround the light-emitting region 108 or the opening 108 of the first sub-pixel 100. In the example of FIG. 2, the groove 107b is arranged so as to surround the light-emitting region 108 or the opening 108 of the second sub-pixel 200 over the entire circumference. Hereinafter, when the groove 107a and the groove 107b are not distinguished from each other and described, they will be described as the groove 107. The mode in which the groove 107 at least partially surrounds the opening 108 may include, for example, a configuration in which the inner angle formed by two line segments connecting the center of the opening 108 and the two end portions of the groove 107 is 180° or more. For example, when the groove 107 is circular, this mode may include a configuration in which the groove 107 is a semi-circle or more. When the groove 107 surrounding one sub-pixel is divided, this mode may include a configuration in which the inner angle formed by the line segment connecting the center of the opening 108 and the two end portions of the groove 107 is obtained for each groove 107, and the sum of the inner angles for each groove 107 is 180° or more.

[0016] The insulating layer (bank) 106 of the third sub-pixel 300 does not include a separation structure arranged to surround the opening OP of the third sub-pixel 300. Alternatively, the insulating layer 106 of the third sub-pixel 300 does not include a separation structure arranged to surround the third sub-pixel 300 between the other sub-pixels 100, 200 arranged adjacent to and surrounding the third sub-pixel 300 and the opening OP of the third sub-pixel 300.

[0017] FIG. 3 is a schematic cross-sectional view enlarging the vicinity of the groove 107 shown in FIG. 1. A lower electrode 102, an insulating layer 106, a functional layer 103, an upper electrode 104, and a protective layer 105 are arranged on the substrate 101. The groove 107 is arranged in the insulating layer 106. In another aspect, the groove 107 is arranged under the functional layer 103. The functional layer 103 is shared by a plurality of sub-pixels or organic light-emitting elements. The functional layer 103 may include, for example, a hole injection layer 103a, a hole transport layer 103b, a light-emitting layer 103c, and an electron transport layer 103d.

[0018] The thickness T2 of the functional layer 103 on the sidewall of the groove 107 of the insulating layer 106 is thinner than the thickness T1 of the functional layer 103 on the flat portion of the insulating layer 106 having a flat upper surface. The hole injection layer 103a and the hole transport layer 103b have relatively high conductivity, but by thinning the thickness T2 of the functional layer 103 on the sidewall of the groove 107, the resistance of the hole injection layer 103a and the hole transport layer 103b can be increased. As a result, by providing the groove 107, the leakage current between adjacent sub-pixels (organic light-emitting elements) is suppressed, and the color mixing between sub-pixels having different emission colors is suppressed. For example, the leakage current (color mixing) between the first sub-pixel 100 and the third sub-pixel 300 is suppressed by the groove 107a, and the leakage current (color mixing) between the second sub-pixel 200 and the third sub-pixel 300 is suppressed by the groove 107b. Also, the leakage current (color mixing) between the first sub-pixel 100 and the second sub-pixel 200 is suppressed by the groove 107a and the groove 107b. Since there are two grooves 107a, 107b between the first sub-pixel 100 and the second sub-pixel 200, the leakage current (color mixing) between the first sub-pixel 100 and the second sub-pixel 200 is effectively suppressed.

[0019] The light-emitting region 108 may have, for example, a circular shape, but may have other shapes such as a polygon. Similarly, the groove 107 may have, for example, a circular shape, but may have other shapes such as a polygon. The light-emitting region 108 and the groove 107 may have shapes similar to each other, but they do not have to. Further, instead of the groove 107, a convex structure or a separation structure may be realized by an electrode. A predetermined voltage may be applied to the electrode.

[0020] The groove 107 and the light-emitting region 108 are not connected. This is because if the groove 107 and the light-emitting region 108 are connected, light emission will occur above or inside the groove 107, resulting in non-uniform light emission as a whole.

[0021] Figures 4 to 6 show three modified examples of the first embodiment. In the modified examples respectively shown in Figures 4 to 6, the groove 107a partially surrounds the light-emitting region inside thereof, and the groove 107b partially surrounds the light-emitting region inside thereof. Also in such modified examples, the leakage current between sub-pixels is suppressed.

[0022] Figure 25 shows another modified example. In the other modified example shown in Figure 25, the groove 107a is arranged to surround the light-emitting region 108 (opening) of the first sub-pixel 100 over the entire circumference. The second sub-pixel 200 and the third sub-pixel 300 do not include a separation structure arranged to surround the light-emitting region 108 (opening). Figure 26 shows still another modified example. In the still another modified example shown in Figure 26, the groove 107b is arranged to surround the light-emitting region 108 (opening) of the second sub-pixel 200 over the entire circumference. The first sub-pixel 100 and the third sub-pixel 300 do not include a separation structure arranged to surround the light-emitting region 108 (opening). Also in such a form, the leakage current between sub-pixels is suppressed.

[0023] FIG. 7 shows another modification of the first embodiment. In the modification shown in FIG. 7, the opening OP or the light-emitting region 109 of the third sub-pixel 300 is larger than the opening OP or the light-emitting region 108 of the first sub-pixel 100 and the opening OP or the light-emitting region 108 of the second sub-pixel 200. Such a configuration can be brought about by the third sub-pixel 300 not having a separation structure or a groove 107. The enlargement of the light-emitting region 108 makes it possible to reduce the current density required to obtain a desired luminance, which can contribute to an extension of the lifespan. Utilizing the fact that the third sub-pixel 300 does not have a separation structure or a groove 107, the light-emitting region 109 of the third sub-pixel 300 may be enlarged, and the light-emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200 may also be enlarged. This means increasing the area ratio of the first sub-pixel 100 and the second sub-pixel 200 with respect to the area ratio of the third sub-pixel 300. Thereby, the lifespan of all of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 can be extended, and as a result, the lifespan of the light-emitting device 1 can be extended.

[0024] FIGS. 8 and 9 depict light-emitting devices of comparative examples. In the comparative examples, each of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 has a groove 107 or a separation structure so as to surround the light-emitting region 108. In such a configuration, since the light-emitting region of the third sub-pixel 300 is limited, the current density required to obtain a desired luminance is higher than that of the first embodiment, and thus it is disadvantageous in terms of lifespan compared to the first embodiment.

[0025] [Second Embodiment] Hereinafter, the light-emitting device 1 of the second embodiment will be described. Matters not mentioned as the second embodiment may follow the first embodiment. The second embodiment may be understood as a modification of the first embodiment. FIG. 1 is incorporated as a cross-sectional view showing a configuration example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light-emitting device 1 of the second embodiment.

[0026] FIG. 10 is a plan view showing an array example of a first sub-pixel 100, a second sub-pixel 200, and a third sub-pixel 300, and a groove 107 in the light-emitting device 1 of the second embodiment. In the second embodiment, a connection groove 107c as a connection separation structure is added to the first embodiment. The connection groove 107c extends so as to connect the first groove 107a and the second groove 107b. Instead of the groove 107c, a convex structure or an electrode may realize the connection separation structure. The connection groove 107c may be arranged so as not to be connected to any of the opening OP of the first sub-pixel 100, the opening OP of the second sub-pixel 200, and the opening OP of the third sub-pixel 300. The connection groove 107c may connect the first separation structure 107a and the second separation structure 107b so as to surround the opening OP of the third sub-pixel 300. One third sub-pixel 300 may be at least partially surrounded by an aggregate of a plurality of grooves 107a, a plurality of grooves 107b, and a plurality of grooves 107c.

[0027] By providing the grooves 107a, 107b, and 107c, the leakage current between adjacent sub-pixels (organic light-emitting elements) is suppressed, and the color mixing between sub-pixels having different emission colors is suppressed. For example, the leakage current (color mixing) between the first sub-pixel 100 and the third sub-pixel 300 is suppressed by the groove 107a, and the leakage current (color mixing) between the second sub-pixel 200 and the third sub-pixel 300 is suppressed by the groove 107b. Further, the leakage current (color mixing) between the first sub-pixel 100 and the second sub-pixel 200 is suppressed by the grooves 107a and 107b. Since there are three grooves 107a, 107b, and 107c between the first sub-pixel 100 and the second sub-pixel 200, the leakage current (color mixing) between the first sub-pixel 100 and the second sub-pixel 200 is effectively suppressed. Further, the leakage current between the third sub-pixel 200 and a sub-pixel arranged close to the outside of the grooves 107a, 107b, and 107c surrounding it is suppressed by the grooves 107a, 107b, and 107c.

[0028] Figures 11 to 13 show three modification examples of the second embodiment. In the modification examples shown in FIGS. 11 and 12, the groove 107a partially surrounds the inner light-emitting region, and the groove 107b partially surrounds the inner light-emitting region. In the modification example shown in FIG. 13, the grooves 107a, 107b, and 107c partially surround the light-emitting region of the third sub-pixel 300 arranged inside them. Even in the modification examples as described above, the leakage current between the sub-pixels is suppressed.

[0029] FIG. 14 shows another modification example of the second embodiment. In the modification example shown in FIG. 14, the opening OP or the light-emitting region 109 of the third sub-pixel 300 is larger than the opening OP or the light-emitting region 108 of the first sub-pixel 100 and the opening OP or the light-emitting region 108 of the second sub-pixel 200. Such a configuration can be brought about by the third sub-pixel 300 not having a separation structure or the groove 107. The enlargement of the light-emitting region 108 makes it possible to reduce the current density required to obtain a desired luminance, which can contribute to the extension of the lifespan. Utilizing the fact that the third sub-pixel 300 does not have a separation structure or the groove 107, the light-emitting region 109 of the third sub-pixel 300 can be enlarged, and the light-emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200 can also be enlarged. This means increasing the area ratio of the first sub-pixel 100 and the second sub-pixel 200 with respect to the area ratio of the third sub-pixel 300. Thereby, the lifespan of all of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 can be extended, and as a result, the lifespan of the light-emitting device 1 can be extended.

[0030] [Third Embodiment] Hereinafter, the light-emitting device 1 of the third embodiment will be described. Matters not referred to as the third embodiment may follow the first or second embodiment. The third embodiment may be understood as a modification example of the first or second embodiment. FIG. 15 is a cross-sectional view showing a configuration example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light-emitting device 1 of the third embodiment.

[0031] In the third embodiment, a reflective layer 109 is added to the first or second embodiment, and the functional layer 103 is replaced with a functional layer 110 including a first light-emitting layer, a charge generation layer 111, and a functional layer 112 including a second light-emitting layer. The light-emitting device 1 of the third embodiment is a tandem type including a functional layer 110 including a first light-emitting layer, a charge generation layer 111, and a functional layer 112 including a second light-emitting layer.

[0032] The charge generation layer 111 is a layer that generates holes and electrons when a voltage is applied between the lower electrode 102 and the upper electrode 104. The charge generation layer 111 contains a compound that easily accepts electrons from other organic compounds. The charge generation layer 111 may be, for example, a combination of an alkali metal and a compound having a lowest unoccupied molecular orbital energy level of -5.0 eV or less, and can function as a charge generation layer. The alkali metal may be, for example, Li, and Li may be a simple metal, a part of a compound, or a part of an organometallic complex. The compound having a lowest unoccupied molecular orbital energy level of -5.0 eV or less may be, for example, a hexaazatriphenylene compound, a radialene compound, hexafluorobenzidine, etc., but is not limited thereto. Since the lowest unoccupied molecular orbital energy level is low enough to extract electrons from the highest occupied molecular orbital of the alkali metal, charge generation can be performed. As a result, positive and negative charges are generated in the charge generation layer 111, and positive or negative charges can be supplied to the layers above and below the charge generation layer. That is, when an electric field is applied between the lower electrode 102 and the upper electrode 104, carriers are generated in the charge generation layer 111, and the carriers are supplied to the functional layer 110 including the first light-emitting layer and the functional layer 112 including the second light-emitting layer, and both can emit light efficiently.

[0033] In the third embodiment, further, in order to optimize the optical distance between the upper surface of the reflective layer 109 and the light-emitting position of the light-emitting layer for each color, the first sub-pixel 100 includes an insulating layer 113, the second sub-pixel 200 includes an insulating layer 114, and the third sub-pixel 300 includes an insulating layer 115. Assuming that the optical path length from the upper surface of the reflective layer 109 to the light-emitting position of the functional layer 110 including the first light-emitting layer is Lr and the phase shift at the reflective layer 109 is Φr, Lr = (2m - (Φr / π)) × (λ / 4) ···(1) m is an integer of 0 or more. The optical distances of the insulating films 113, 114, and 1115 can be adjusted so as to approximately satisfy Equation (1).

[0034] When the optical distance Ls from the light emission position to the reflection surface of the upper electrode 104 is such that the phase shift when the light of wavelength λ is reflected by the reflection surface is Φs, it approximately satisfies the following Equation (2). In this configuration, m' = 0.

[0035] Ls = (2m' - (Φs / π)) × (λ / 4) = -(Φs / π) × (λ / 4) ···(2) Therefore, the total layer interference L approximately satisfies the condition of Equation (3). L = Lr + L = (2m - Φ / π) × (λ / 4) ···(3) Here, Φ is the sum of the phase shifts when the light of wavelength λ is reflected by the reflection layer 109 and the upper electrode 104, that is, Φr + Φs.

[0036] The charge generation layer 111 can be shared by a plurality of sub-pixels. However, since the charge generation layer 111 generates charges when an electric field is applied, charges are also generated if an electric field is applied even between sub-pixels. The generated charges can reach adjacent pixels by the functional layers that are not divided between sub-pixels, which can cause unintended light emission.

[0037] In the present embodiment, by providing the groove 107 in the insulating layer 106, the thickness of the charge generation layer 111 above the flat portion where the upper surface of the insulating layer 106 is flat can be formed such that the thickness of the charge generation layer 111 above the side wall of the groove 107 is thin. Although the charge generation layer 111 has relatively high conductivity, the resistance can be increased by reducing the thickness of the charge generation layer 111 on the side wall of the groove 107. As a result, the leakage current between adjacent sub-pixels (organic light-emitting elements) is suppressed, and color mixing between sub-pixels having different emission colors is suppressed.

[0038] [Fourth Embodiment] Hereinafter, the light-emitting device 1 of the fourth embodiment will be described. Matters not mentioned as the fourth embodiment may follow the third embodiment. The fourth embodiment may be understood as a modification of the third embodiment. FIG. 16 is a cross-sectional view showing an example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light-emitting device 1 of the fourth embodiment.

[0039] In the fourth embodiment, color filters 120, 220, and 320 are added to the light-emitting device 1 of the third embodiment. The color filters 120, 220, and 320 are disposed on the planarization layer 116. The color filters 120, 220, and 320 are color filters that transmit light of different colors (wavelength bands). A microlens 400 may be disposed on the color filters 120, 220, and 320. The microlens may simply be referred to as a lens.

[0040] As illustrated in FIG. 17, the curvature of the microlens 401 of the third sub-pixel 300 may be different from the curvature of the microlenses 400 of the first sub-pixel 100 and the second sub-pixel 200. The light-emitting region 109 of the third sub-pixel 300 may be larger than the light-emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200. Therefore, by setting the curvature of the microlens 401 to a curvature corresponding to the size of the light-emitting region of the third sub-pixel 300, light can be extracted more efficiently.

[0041] Also, in order to match the viewing angle characteristics of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300, the curvature of the microlens 401 may be adjusted. This is advantageous for reducing color shift due to the viewing angle dependence of the luminance corresponding to each color. When the light-emitting region 109 of the third sub-pixel 300 is larger than the light-emitting regions 108 of the first sub-pixel 100 and the second sub-pixel 200, the curvature of the microlens 401 may be adjusted accordingly. Thereby, the difference in the viewing angle dependence of the luminance can be reduced, and color shift when the viewing angle changes can be suppressed.

[0042] Furthermore, the wavelength band of the light of the third sub-pixel 300 may be shorter than the wavelength band of the light of the first sub-pixel 100 or the second sub-pixel 200. Since the light-emitting layer with a short emission wavelength has a relatively reduced lifespan, by enlarging the light-emitting region 109 of the third sub-pixel 300, the reduction in lifespan can be suppressed.

[0043] [Embodiment 5] Hereinafter, the light-emitting device 1 of Embodiment 5 will be described. Matters not mentioned as Embodiment 5 may follow Embodiments 1 to 4. Embodiment 5 may be understood as a modification of Embodiments 1 to 4. FIGS. 18 and 19 are plan views showing an arrangement example of the first sub-pixel 100, the second sub-pixel 200, and the third sub-pixel 300 of the light-emitting device 1 of Embodiment 5.

[0044] FIG. 18 shows a Bayer arrangement, and FIG. 19 shows a Pentile arrangement. Similar to each of the above embodiments, the groove 107a may be arranged so as to surround the light-emitting region 108 of the first sub-pixel 100, and the groove 107b may be arranged so as to surround the light-emitting region 108 of the second sub-pixel 200. Further, the groove 107c may be arranged to connect the groove 107a and the groove 107b and surround the third sub-pixel 300. [Other configurations in the embodiment] [Configuration of the organic light-emitting element] The organic light-emitting element may be configured by arranging an insulating layer, a lower electrode, a functional layer including a light-emitting layer, and an upper electrode on a substrate. A protective layer, a color filter, a microlens, etc. may be provided on the upper electrode. When providing a color filter, a planarization layer may be provided between the protective layer. The planarization layer can be made of an acrylic resin or the like. The same applies when providing a planarization layer between the color filter and the microlens.

[0045] [Substrate] Examples of the substrate include quartz, glass, silicon wafers, resins, metals, etc. Further, the substrate may be provided with switching elements such as transistors and wirings, and an insulating layer may be provided thereon. As the insulating layer, any material may be used as long as a contact hole can be formed so that a wiring can be formed between the insulating layer and the first electrode, and insulation from non-connected wirings can be ensured. For example, resins such as polyimide, silicon oxide, silicon nitride, etc. can be used.

[0046] [Electrode] As the electrodes, a pair of electrodes can be used. The pair of electrodes may be an anode and a cathode. When an electric field is applied in the direction in which the organic light-emitting element emits light, the electrode with a higher potential is the anode, and the other is the cathode. Also, it can be said that the electrode that supplies holes to the light-emitting layer is the anode, and the electrode that supplies electrons is the cathode.

[0047] As the constituent material of the anode, those with as large a work function as possible are preferable. For example, simple metals such as gold, platinum, silver, copper, nickel, palladium, cobalt, selenium, vanadium, tungsten, aluminum, titanium, etc., mixtures containing these, or alloys combining these can be used. Alternatively, metal oxides such as tin oxide, zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide, etc. may be used. Also, conductive polymers such as polyaniline, polypyrrole, polythiophene, etc. can be used.

[0048] These electrode materials may be used alone or in combination of two or more. Also, the anode may be composed of a single layer or multiple layers.

[0049] When used as a reflective electrode, for example, chromium, aluminum, silver, titanium, tungsten, molybdenum, or alloys or laminates thereof can be used. With the above materials, it is also possible to function as a reflective film without having the role of an electrode. When used as a transparent electrode, an oxide transparent conductive layer such as indium tin oxide (ITO) or indium zinc oxide can be used, but it is not limited thereto. For the formation of the electrode, photolithography technology can be used.

[0050] On the other hand, as a constituent material of the cathode, those with a small work function are preferable. For example, alkali metals such as lithium, alkaline earth metals such as calcium, metal simple substances such as aluminum, titanium, manganese, silver, lead, chromium, or mixtures containing these can be mentioned. Alternatively, alloys combining these metal simple substances can also be used. For example, magnesium-silver, aluminum-lithium, aluminum-magnesium, silver-copper, zinc-silver, etc. can be used. The use of metal oxides such as indium tin oxide (ITO) is also possible. These electrode materials may be used alone or in combination of two or more. Also, the cathode may have a single-layer structure or a multilayer structure. Among them, it is preferable to use silver, and in order to reduce the aggregation of silver, it is more preferable to use a silver alloy. As long as the aggregation of silver can be reduced, the ratio of the alloy does not matter. For example, silver: other metals may be 1:1, 3:1, etc.

[0051] The cathode may be a top-emission element using an oxide conductive layer such as ITO, or a bottom-emission element using a reflective electrode such as aluminum (Al), and is not particularly limited. As a method for forming the cathode, although not particularly limited, the use of direct current and alternating current sputtering methods, etc. is more preferable because the film coverage is good and the resistance is easily reduced.

[0052] [Organic compound layer] The organic compound layer may be formed as a single layer or multiple layers. When having multiple layers, depending on its function, it may be called a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, or an electron injection layer. The organic compound layer is mainly composed of organic compounds, but may also contain inorganic atoms or inorganic compounds. For example, it may have copper, lithium, magnesium, aluminum, iridium, platinum, molybdenum, zinc, etc. The organic compound layer may be disposed between the first electrode and the second electrode and may be arranged in contact with the first electrode and the second electrode.

[0053] [Protection layer] A protection layer may be provided on the cathode. For example, by adhering glass provided with a moisture absorbent on the cathode, the intrusion of water or the like into the organic compound layer can be reduced, and the occurrence of display defects can be reduced. Further, as another embodiment, a passivation film such as silicon nitride may be provided on the cathode to reduce the intrusion of water or the like into the organic compound layer. For example, after forming the cathode, it may be transported to another chamber without breaking the vacuum, and a silicon nitride film with a thickness of 2 μm may be formed by CVD method to be used as a protection layer. A protection layer using atomic layer deposition (ALD method) may be provided after the film formation by CVD method. The material of the film by ALD method is not limited, but may be silicon nitride, silicon oxide, aluminum oxide, etc. Silicon nitride may be further formed by CVD method on the film formed by ALD method. The film by ALD method may have a smaller film thickness than the film formed by CVD method. Specifically, it may be 50% or less, and further 10% or less.

[0054] [Color filter] A color filter may be provided on the protection layer. For example, a color filter considering the size of the organic light emitting element may be provided on another substrate and bonded to the substrate provided with the organic light emitting element, or the color filter may be patterned using photolithography technology on the protection layer shown above. The color filter may be composed of a polymer.

[0055] [Planarization layer] A planarization layer may be provided between the color filter and the protective layer. The planarization layer is provided for the purpose of reducing the unevenness of the underlying layer. Without limiting the purpose, it may also be referred to as a material resin layer. The planarization layer may be composed of an organic compound, which may be a low-molecular compound or a high-molecular compound, but a high-molecular compound is preferred.

[0056] The planarization layer may be provided above and below the color filter, and its constituent materials may be the same or different. Specifically, examples include polyvinylcarbazole resin, polycarbonate resin, polyester resin, ABS resin, acrylic resin, polyimide resin, phenol resin, epoxy resin, silicone resin, urea resin, etc.

[0057] [Micro lens] The light-emitting device may have an optical member such as a micro lens on its light-emitting side. The micro lens may be composed of acrylic resin, epoxy resin, etc. The micro lens may be for the purpose of increasing the amount of light extracted from the light-emitting device and controlling the direction of the extracted light. The micro lens may have a hemispherical shape. When having a hemispherical shape, among the tangents in contact with the hemisphere, there is a tangent parallel to the insulating layer, and the contact point between the tangent and the hemisphere is the vertex of the micro lens. The vertex of the micro lens can be determined in the same way in any cross-sectional view. That is, among the tangents in contact with the semi-circle of the micro lens in the cross-sectional view, there is a tangent parallel to the insulating layer, and the contact point between the tangent and the semi-circle is the vertex of the micro lens.

[0058] Also, the midpoint of the micro lens can be defined. In the cross-section of the micro lens, a line segment from the point where the arc shape ends to the point where another arc shape ends is imagined, and the midpoint of the line segment can be called the midpoint of the micro lens. The cross-section for discriminating the vertex and the midpoint may be a cross-section perpendicular to the insulating layer.

[0059] [Counter substrate] On the planarization layer, a counter substrate may be provided. Since the counter substrate is provided at a position corresponding to the aforementioned substrate, it is called a counter substrate. The constituent material of the counter substrate may be the same as that of the aforementioned substrate. When the aforementioned substrate is the first substrate, the counter substrate may be the second substrate.

[0060] [Organic layer] Functional layers (such as a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer, etc.) including the light-emitting layer constituting the organic light-emitting device according to an embodiment of the present invention are formed by the following method.

[0061] For the organic compound layer constituting the organic light-emitting device according to an embodiment of the present invention, dry processes such as vacuum evaporation, ionization evaporation, sputtering, and plasma can be used. Instead of the dry process, a wet process in which the layer is formed by dissolving it in an appropriate solvent and using a known coating method (for example, spin coating, dipping, casting method, LB method, inkjet method, etc.) can also be used.

[0062] Here, when a layer is formed by a vacuum evaporation method, a solution coating method, or the like, crystallization and the like hardly occur and the stability over time is excellent. When forming a film by a coating method, a film can also be formed in combination with an appropriate binder resin.

[0063] Examples of the binder resin include, but are not limited to, polyvinylcarbazole resin, polycarbonate resin, polyester resin, ABS resin, acrylic resin, polyimide resin, phenol resin, epoxy resin, silicone resin, urea resin, etc.

[0064] These binder resins may be used alone as a homopolymer or a copolymer, or two or more kinds may be mixed and used. Further, if necessary, additives such as known plasticizers, antioxidants, and ultraviolet absorbers may be used in combination.

[0065] [Pixel circuit] The light-emitting device may have a pixel circuit connected to a light-emitting element. The pixel circuit may be an active matrix type that independently controls the light emission of a first light-emitting element and a second light-emitting element. The active matrix type circuit may be voltage programming or current programming. The driving circuit has a pixel circuit for each pixel. The pixel circuit may have a light-emitting element, a transistor that controls the light emission luminance of the light-emitting element, a transistor that controls the light emission timing, a capacitor that holds the gate voltage of the transistor that controls the light emission luminance, and a transistor for connecting to GND without passing through the light-emitting element.

[0066] The light-emitting device has a display area and a peripheral area arranged around the display area. The display area has a pixel circuit, and the peripheral area has a display control circuit. The mobility of the transistors constituting the pixel circuit may be smaller than the mobility of the transistors constituting the display control circuit.

[0067] The slope of the current-voltage characteristics of the transistors constituting the pixel circuit may be smaller than the slope of the current-voltage characteristics of the transistors constituting the display control circuit. The slope of the current-voltage characteristics can be measured by so-called Vg-Ig characteristics.

[0068] The transistors constituting the pixel circuit are transistors connected to a light-emitting element such as a first light-emitting element.

[0069] The magnitude of the drive current may be determined according to the size of the light-emitting area. Specifically, when the first light-emitting element and the second light-emitting element emit light at the same luminance, the current value flowing through the first light-emitting element may be smaller than the current value flowing through the second light-emitting element. This is because the required current may be small since the light-emitting area is small.

[0070] [Pixel] The light-emitting device has a plurality of pixels. The pixels have sub-pixels that emit different colors from each other. The sub-pixels may have light emission colors of RGB, for example.

[0071] The pixel emits light in a region also called a pixel aperture. This region is the same as the first region. The pixel aperture may be 15 μm or less and may be 5 μm or more. More specifically, it may be 11 μm, 9.5 μm, 7.4 μm, 6.4 μm, etc.

[0072] The space between sub-pixels may be 10 μm or less. Specifically, it may be 8 μm, 7.4 μm, 6.4 μm.

[0073] In a plan view, the pixel can take a known arrangement form. For example, it may be a delta arrangement, a pentile arrangement, or a Bayer arrangement. The shape of the sub-pixel in the plan view can be any known shape. For example, it can be a quadrilateral such as a rectangle or a rhombus, a hexagon, etc. Of course, even if it is not an exact figure but a shape close to a rectangle, it is included in the rectangle. The shape of the sub-pixel and the pixel arrangement can be used in combination.

[0074] [Other Embodiments] FIG. 20 is a schematic diagram showing an example of the display device according to this embodiment. The display device 1000 may have a touch panel 1003, a display panel 1005, a frame 1006, a circuit board 1007, and a battery 1008 between an upper cover 1001 and a lower cover 1009. The light-emitting device of each of the above embodiments can be applied to the display panel 1005. The touch panel 1003 and the display panel 1005 are connected to flexible printed circuits FPC1002 and 1004. Transistors are printed on the circuit board 1007. If the display device is not a portable device, the battery 1008 may not be provided, or even if it is a portable device, it may be provided at another position.

[0075] The display device according to this embodiment may have a color filter having red, green, and blue. The red, green, and blue of the color filter may be arranged in a delta arrangement.

[0076] The display device according to this embodiment may be used for the display unit of a mobile terminal. In that case, it may have both a display function and an operation function. Examples of the mobile terminal include mobile phones such as smartphones, tablets, head-mounted displays, and the like.

[0077] The display device according to this embodiment may be used for the display unit of an imaging device having an optical unit with a plurality of lenses and an imaging element that receives light that has passed through the optical unit. The imaging device may have a display unit that displays information acquired by the imaging element. Further, the display unit may be a display unit exposed to the outside of the imaging device or a display unit disposed within the viewfinder. The imaging device may be a digital camera or a digital video camera.

[0078] FIG. 21(a) is a schematic diagram showing an example of the imaging device according to this embodiment. The imaging device 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The light-emitting device of each of the above embodiments may be applied to the viewfinder 1101. In that case, the display device may display not only the image to be captured but also environmental information, imaging instructions, and the like. The environmental information may include the intensity of external light, the direction of external light, the speed at which the subject moves, the possibility that the subject is shielded by an obstacle, and the like.

[0079] Since the timing suitable for imaging is a very short time, it is better to display information as soon as possible. Therefore, it is preferable to use the display device using the organic light-emitting element of the present invention. This is because the organic light-emitting element has a high response speed. The display device using the organic light-emitting element can be more suitably used for these devices that require a display speed than a liquid crystal display device.

[0080] The imaging device 1100 has an optical unit (not shown). The optical unit has a plurality of lenses and forms an image on an imaging element housed in the housing 1104. The plurality of lenses can adjust the focus by adjusting their relative positions. This operation can also be performed automatically. The imaging device may be called a photoelectric conversion device. The photoelectric conversion device may include, as imaging methods, a method of detecting the difference from a previous image instead of performing sequential imaging, a method of cutting out from an image that is always recorded, and the like.

[0081] FIG. 21(b) is a schematic diagram showing an example of the electronic device according to the present embodiment. The electronic device 1200 has a display unit 1201, an operation unit 1202, and a housing 1203. The light-emitting device of each of the above embodiments can be applied to the display unit 1201. The housing 1203 may have a circuit, a printed circuit board having the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a reaction unit of a touch panel method. The operation unit may be a biometric recognition unit that recognizes a fingerprint and performs unlocking or the like. An electronic device having a communication unit can also be called a communication device. The electronic device may further have a camera function by including a lens and an imaging element. An image captured by the camera function is displayed on the display unit. Examples of the electronic device include a smartphone and a notebook personal computer.

[0082] FIG. 22 is a schematic diagram showing an example of the display device according to the present embodiment. FIG. 22(a) shows a display device such as a TV monitor or a PC monitor. The display device 1300 has a frame 1301 and a display unit 1302. The light-emitting device of each of the above embodiments can be applied to the display unit 1302.

[0083] It has a frame 1301 and a base 1303 that supports the display unit 1302. The base 1303 is not limited to the form of FIG. 22(a). The lower side of the frame 1301 may also serve as the base.

[0084] Further, the frame 1301 and the display unit 1302 may be bent. The radius of curvature may be 5000 mm or more and 6000 mm or less.

[0085] FIG. 22(b) is a schematic diagram showing another example of the display device according to the present embodiment. The display device 1310 in FIG. 22(b) is configured to be foldable and is a so-called foldable display device. The display device 1310 includes a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The light-emitting device according to the present embodiment can be applied to the first display unit 1311 and the second display unit 1312. The first display unit 1311 and the second display unit 1312 may be a single seamless display device. The first display unit 1311 and the second display unit 1312 can be separated at the bending point. The first display unit 1311 and the second display unit 1312 may display different images, or may display one image together with the first and second display units.

[0086] FIG. 23(a) is a schematic diagram showing an example of the lighting device according to the present embodiment. The lighting device 1400 may include a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusing portion 1405. The light-emitting device of each of the above embodiments can be applied to the light source 1402. The optical filter may be a filter that improves the color rendering property of the light source. The light diffusing portion can effectively diffuse the light of the light source, such as lighting up, and deliver the light to a wide range. The optical filter and the light diffusing portion may be provided on the light-emitting side of the lighting. If necessary, a cover may be provided on the outermost part.

[0087] The lighting device is, for example, a device for lighting a room. The lighting device may emit any color such as white or day white. It may have a dimming circuit for dimming them. The lighting device may have the organic light-emitting element of the present invention and a power supply circuit connected thereto. The power supply circuit is a circuit that converts an AC voltage into a DC voltage. Also, white has a color temperature of 4200K and day white has a color temperature of 5000K. The lighting device may have a color filter.

[0088] In addition, the lighting device according to the present embodiment may have a heat radiating portion. The heat radiating portion releases the heat inside the device to the outside of the device, and examples thereof include a metal having a high specific heat and liquid silicon.

[0089] FIG. 23(b) is a schematic view of an automobile which is an example of a moving body according to the present embodiment. The automobile has a tail lamp which is an example of a lighting device. The automobile 1500 may have a tail lamp 1501 and may be configured to light up the tail lamp when a braking operation or the like is performed.

[0090] The light emitting device of each of the above embodiments can be applied to the tail lamp 1501. The tail lamp may have a protective member for protecting the organic EL element. The protective member has a certain degree of strength and may be made of any material as long as it is transparent, but is preferably made of polycarbonate or the like. A phthalic acid derivative, an acrylonitrile derivative or the like may be mixed with the polycarbonate.

[0091] The automobile 1500 may have a vehicle body 1503 and a window 1502 attached thereto. The window may be a transparent display as long as it is not a window for checking the front and rear of the automobile. The transparent display may have an organic light emitting element according to the present embodiment. In this case, constituent materials such as electrodes of the organic light emitting element are made of transparent members.

[0092] The moving body according to the present embodiment may be a ship, an aircraft, a drone or the like. The moving body may have a fuselage and a lighting device provided on the fuselage. The lighting device may emit light for notifying the position of the fuselage. The lighting device has an organic light emitting element according to the present embodiment.

[0093] With reference to FIG. 24, application examples of the display device of each of the above embodiments will be described. The display device can be applied to a system wearable as a wearable device such as, for example, smart glasses, an HMD, or smart contacts. The imaging display device used in such an application example has an imaging device capable of photoelectrically converting visible light and a display device capable of emitting visible light.

[0094] FIG. 24(a) illustrates glasses 1600 (smart glasses) according to one application example. An imaging device 1602 such as a CMOS sensor or a SPAD is provided on the front surface side of the lens 1601 of the glasses 1600. Also, a display device of each of the above-described embodiments is provided on the back surface side of the lens 1601.

[0095] The glasses 1600 further include a control device 1603. The control device 1603 functions as a power supply that supplies power to the imaging device 1602 and the display device according to each embodiment. Also, the control device 1603 controls the operations of the imaging device 1602 and the display device. An optical system for condensing light onto the imaging device 1602 is formed in the lens 1601.

[0096] FIG. 24(b) illustrates glasses 1610 (smart glasses) according to one application example. The glasses 1610 have a control device 1612, and an imaging device corresponding to the imaging device 1602 and a display device are mounted on the control device 1612. An optical system for the imaging device within the control device 1612 and for projecting light emitted from the display device is formed in the lens 1611, and an image is projected onto the lens 1611. The control device 1612 functions as a power supply that supplies power to the imaging device and the display device, and controls the operations of the imaging device and the display device. The control device may have a gaze detection unit that detects the wearer's gaze. Infrared light may be used for gaze detection. The infrared light emitting unit emits infrared light toward the eyeball of the user who is gazing at the display image. An imaging unit having a light receiving element detects the reflected light of the emitted infrared light from the eyeball, and thus an imaging image of the eyeball is obtained. By having a reduction means for reducing the light from the infrared light emitting unit to the display unit in a frontal view, a decrease in image quality is reduced.

[0097] The user's gaze with respect to the display image is detected from the imaging image of the eyeball obtained by imaging infrared light. Any known method can be applied to gaze detection using the imaging image of the eyeball. As an example, a gaze detection method based on a Purkinje image by reflection of irradiation light on the cornea can be used.

[0098] More specifically, a gaze detection process based on the pupil corneal reflex method is performed. Using the pupil corneal reflex method, a gaze vector representing the orientation (rotation angle) of the eyeball is calculated based on the image of the pupil and the Purkinje image included in the captured image of the eyeball, thereby detecting the user's gaze.

[0099] The display device according to an embodiment of the present invention may include an imaging device having a light receiving element, and may control the display image of the display device based on the user's gaze information from the imaging device.

[0100] Specifically, the display device determines, based on the gaze information, a first visual field region that the user is gazing at and a second visual field region other than the first visual field region. The first visual field region and the second visual field region may be determined by the control device of the display device, or the display device may receive those determined by an external control device. In the display area of the display device, the display resolution of the first visual field region may be controlled to be higher than that of the second visual field region. That is, the resolution of the second visual field region may be made lower than that of the first visual field region.

[0101] Further, the display area has a first display area and a second display area different from the first display area, and based on the gaze information, a region with a higher priority is determined from the first display area and the second display area. The first visual field region and the second visual field region may be determined by the control device of the display device, or the display device may receive those determined by an external control device. The resolution of the region with a higher priority may be controlled to be higher than that of the region other than the region with a higher priority. That is, the resolution of the region with a relatively lower priority may be made lower.

[0102] Note that AI may be used to determine the first visual field region or the region with a higher priority. AI may be a model configured to estimate the angle of the gaze and the distance to the target at the tip of the gaze from the image of the eyeball, using the image of the eyeball and the direction in which the eyeball in the image is actually looking as teacher data. The AI program may be possessed by the display device, the imaging device, or an external device. When an external device has it, it is transmitted to the display device via communication.

[0103] When performing display control based on visual recognition, it can be preferably applied to smart glasses further including an imaging device that images the outside. The smart glasses can display the imaged external information in real time.

[0104] As described above, by using the light-emitting device according to this embodiment, it is possible to achieve a good image quality and a stable display even for long-time display.

[0105] The disclosure of this specification includes the following light-emitting devices, display devices, photoelectric conversion devices, electronic devices, and moving bodies. (Item 1) A light-emitting device including a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein one of the first sub-pixel, the second sub-pixel, and the third sub-pixel is adjacent to the other two sub-pixels, The plurality of sub-pixels include a lower electrode, a bank having an opening exposing a central portion of the lower electrode, an organic compound layer disposed to cover the lower electrode and the bank and including a light-emitting layer, and an upper electrode disposed on the organic compound layer. The bank of the first sub-pixel includes a first separation structure that at least partially surrounds the opening disposed on the lower electrode of the first sub-pixel. The bank of the third sub-pixel does not include a separation structure disposed to surround the opening of the third sub-pixel. A light-emitting device characterized by the above. (Item 2) The bank of the second sub-pixel includes a second separation structure that at least partially surrounds the opening disposed on the lower electrode of the second sub-pixel. The light-emitting device according to Item 1, characterized by the above. (Item 3) The opening of the third sub-pixel is larger than the opening of the first sub-pixel and the opening of the second sub-pixel. The light-emitting device according to Item 1, characterized by the above. (Item 4) The first separation structure is disposed on the lower electrode of the first sub-pixel. The second separation structure is disposed on the lower electrode of the first sub-pixel. The light-emitting device according to item 1, characterized in that. (Item 5) The first separation structure and the second separation structure include a portion disposed between the first sub-pixel and the second sub-pixel. The light-emitting device according to any one of items 1 to 3, characterized in that. (Item 6) The bank of the third sub-pixel is disposed separately from the bank of the first sub-pixel and the bank of the second sub-pixel. The light-emitting device according to any one of items 1 to 4, characterized in that. (Item 7) The bank of the third sub-pixel does not include a separation structure disposed so as to surround the third sub-pixel between the opening of the third sub-pixel and another sub-pixel disposed adjacent to and surrounding the third sub-pixel. The light-emitting device according to any one of items 1 to 6, characterized in that. (Item 8) The first separation structure surrounds the opening of the first sub-pixel over the entire circumference. The light-emitting device according to any one of items 1 to 7, characterized in that. (Item 9) The first separation structure partially surrounds the opening of the first sub-pixel. The light-emitting device according to any one of items 1 to 7, characterized in that. (Item 10) The light-emitting device further includes a connection separation structure extending so as to connect the first separation structure and the second separation structure. The light-emitting device according to any one of items 1 to 9, characterized in that. (Item 11) The connection separation structure is not connected to any of the opening of the first sub-pixel, the opening of the second sub-pixel, and the opening of the third sub-pixel. The light-emitting device according to item 10, characterized in that. (Item 12) The connection and separation structure connects the first separation structure and the second separation structure so as to surround the opening of the third sub-pixel. The light-emitting device according to item 10, characterized in that. (Item 13) The organic compound layer includes a plurality of light-emitting layers and a charge generation layer disposed between the plurality of light-emitting layers. The light-emitting device according to any one of items 1 to 12, characterized in that. (Item 14) Each of the first sub-pixel, the second sub-pixel, and the third sub-pixel includes a lens. In the first sub-pixel, the first separation structure is disposed between the lens and the lower electrode. In the second sub-pixel, the second separation structure is disposed between the lens and the lower electrode. The light-emitting device according to any one of items 1 to 13, characterized in that. (Item 15) The curvature of the lens of the third sub-pixel is different from the curvature of at least one of the lens of the first sub-pixel and the lens of the second sub-pixel. The light-emitting device according to item 14, characterized in that. (Item 16) The wavelength of the light generated by the third sub-pixel is shorter than the wavelength of the light generated by the first sub-pixel. The light-emitting device according to any one of items 1 to 15, characterized in that. (Item 17) A display device, characterized in that it includes the light-emitting device according to any one of items 1 to 16. (Item 18) An optoelectronic conversion device having an optical unit having a plurality of lenses, an image sensor that receives light that has passed through the optical unit, and a display unit that displays an image captured by the image sensor. The display unit includes the light-emitting device according to any one of items 1 to 16. The optoelectronic conversion device, characterized in that. (Item 19) A display unit including the light-emitting device according to any one of items 1 to 16, A housing provided with the display unit, a communication unit provided in the housing and communicating with the outside, and the electronic device is characterized by the above. An electronic device characterized by the above. (Item 20) A light source including the light emitting device according to any one of Items 1 to 16, a light diffusing part or an optical film that transmits the light emitted by the light source, and the lighting device is characterized by including the above. A lighting device characterized by the above. (Item 21) A lighting fixture having the light emitting device according to any one of Items 1 to 16, a body provided with the lighting fixture, and the moving body is characterized by including the above. A moving body characterized by the above.

[0106] The invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, claims are attached to disclose the scope of the invention.

Description of Reference Numerals

[0107] 100: First sub-pixel, 200: Second sub-pixel, 300: Third sub-pixel, 102: Lower electrode, 103: Functional layer, 104: Upper electrode, 105: Protection layer, 106: Insulating layer (bank), 107: Groove (separation structure), 108: Light emitting region, 109: Light emitting region, OP: Opening

Claims

1. A light-emitting device including a plurality of sub-pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein one of the first sub-pixel, the second sub-pixel, and the third sub-pixel is adjacent to the other two sub-pixels, The plurality of sub-pixels include a lower electrode, a bank having an opening exposing a central portion of the lower electrode, an organic compound layer disposed to cover the lower electrode and the bank and including a light-emitting layer, and an upper electrode disposed on the organic compound layer, The bank of the first sub-pixel includes a first separation structure at least partially surrounding the opening disposed on the lower electrode of the first sub-pixel, The bank of the third sub-pixel does not include a separation structure disposed to surround the opening of the third sub-pixel, The first separation structure is disposed at a position overlapping the lower electrode of the first sub-pixel on the lower electrode of the first sub-pixel, A light-emitting device characterized by the above.

2. The bank of the second sub-pixel includes a second separation structure at least partially surrounding the opening disposed on the lower electrode of the second sub-pixel, The light-emitting device according to claim 1, characterized by the above.

3. The opening of the third sub-pixel is larger than the opening of the first sub-pixel and the opening of the second sub-pixel, The light-emitting device according to claim 1, characterized by the above.

4. The bank of the second sub-pixel includes a second separation structure at least partially surrounding the opening disposed on the lower electrode of the second sub-pixel, The first separation structure is disposed on the lower electrode of the first sub-pixel, The second separation structure is disposed on the lower electrode of the second sub-pixel, The light-emitting device according to claim 1, characterized by the above.

5. The bank of the second sub-pixel includes a second separation structure at least partially surrounding the opening disposed on the lower electrode of the second sub-pixel, The first separation structure and the second separation structure include a portion disposed between the first sub-pixel and the second sub-pixel, The light-emitting device according to claim 1, characterized by the above.

6. The bank of the third sub-pixel is disposed separated from the bank of the first sub-pixel and the bank of the second sub-pixel, The light-emitting device according to claim 1, characterized by the above.

7. The bank of the third sub-pixel does not include a separation structure arranged to surround the third sub-pixel between the other sub-pixels arranged adjacent to and surrounding the third sub-pixel and the opening of the third sub-pixel. The light-emitting device according to claim 1, characterized in that.

8. The first separation structure surrounds the opening of the first sub-pixel over the entire circumference. The light-emitting device according to claim 1, characterized in that.

9. The first separation structure partially surrounds the opening of the first sub-pixel. The light-emitting device according to claim 1, characterized in that.

10. The bank of the second sub-pixel includes a second separation structure that at least partially surrounds the opening arranged on the lower electrode of the second sub-pixel, and further includes a connection separation structure extending to connect the first separation structure and the second separation structure. The light-emitting device according to claim 1, characterized in that.

11. The connection separation structure is not connected to any of the opening of the first sub-pixel, the opening of the second sub-pixel, and the opening of the third sub-pixel. The light-emitting device according to claim 10, characterized in that.

12. The connection separation structure connects the first separation structure and the second separation structure so as to surround the opening of the third sub-pixel. The light-emitting device according to claim 10, characterized in that.

13. The organic compound layer includes a plurality of light-emitting layers and a charge generation layer arranged between the plurality of light-emitting layers. The light-emitting device according to claim 1, characterized in that.

14. Each of the first sub-pixel, the second sub-pixel, and the third sub-pixel includes a lens. In the first sub-pixel, the first separation structure is arranged between the lens and the lower electrode. In the second sub-pixel, the second separation structure is arranged between the lens and the lower electrode. The light-emitting device according to claim 2, characterized in that.

15. The curvature of the lens of the third sub-pixel is different from the curvature of at least one of the lens of the first sub-pixel and the lens of the second sub-pixel. The light-emitting device according to claim 14, characterized in that.

16. The wavelength of the light generated by the third sub-pixel is shorter than the wavelength of the light generated by the first sub-pixel. The light-emitting device according to claim 1, characterized in that.

17. A display device comprising the light-emitting device according to any one of claims 1 to 16.

18. An optoelectronic conversion device, comprising: an optical unit having a plurality of lenses; an image sensor that receives light that has passed through the optical unit; and a display unit that displays an image captured by the image sensor. The display unit includes the light-emitting device according to any one of claims 1 to 16.

19. A display unit including the light-emitting device according to any one of claims 1 to 16, a housing provided with the display unit, and a communication unit provided in the housing and communicating with the outside. An electronic device characterized by the above.

20. A lighting device, comprising: a light source including the light-emitting device according to any one of claims 1 to 16, and a light diffusing unit or an optical film that transmits light emitted by the light source.

21. A moving body, comprising: a lighting fixture having the light-emitting device according to any one of claims 1 to 16, and a body provided with the lighting fixture. ​ ​ ​

Images