Light-emitting device, display device, imaging device and electronic device

Abstract

To provide a technique advantageous in efficiently taking out light with a desired wavelength without reducing color purity.SOLUTION: A light emitting device has a reflection film, a first electrode, an organic film including a light emitting layer, a second electrode, and an optical member, which are arranged in this order on a principal surface of a substrate, and is provided with a bank that covers a peripheral part of the first electrode to define a light emitting area. The reflection film, the first electrode, the organic film, and the second electrode constitute a resonator structure that resonates light generated on the organic film between the reflection film and the second electrode. In the light emitting area, a top face of the reflection film is more flat than the first electrode, and the resonator structure has a plurality of optical path lengths different from each other.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a light-emitting device, a display device, an imaging device, and an electronic device. [Background technology]

[0002] In recent years, the development of organic light-emitting elements (also called organic EL elements or OLEDs) that can be used as light sources has progressed. In a display device using an organic light-emitting element as a light source, full-color display can be realized by providing sub-pixels of red (R), green (G), and blue (B). Since organic light-emitting elements utilize the light-emitting phenomenon of organic light-emitting molecules, they generally emit light having a wide spectrum that is specific to organic materials. This causes a problem of reduced color purity and a narrow color reproduction range of the display device. In addition, most of the light generated in the organic light-emitting element is confined inside the organic light-emitting element, which causes a problem of reduced light that is actually extracted. For this reason, in order to improve color purity and light extraction efficiency, there is a method of using a microresonator structure and a lens, as described in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-54526 A Summary of the Invention [Problem to be solved by the invention]

[0004] The light emitted from an organic light-emitting element having a microcavity structure has a narrow spectral linewidth according to the wavelength range resonating inside the resonator. Therefore, while an organic light-emitting element having a microcavity structure is advantageous for improving color purity, the amount of extracted light is reduced and brightness is reduced because the spectral linewidth is narrowed by the resonance effect.

[0005] Therefore, if an optical member such as a microlens is used on an organic light-emitting element having a microcavity structure to improve the brightness, the oblique light deviating from the normal direction of the above-mentioned resonator structure is also extracted to the outside by the optical member. However, the color purity is reduced because light other than the desired wavelength that is enhanced by the resonator effect is extracted.

[0006] An object of the present invention is to provide an advantageous technique for efficiently extracting light of a desired wavelength without reducing color purity. [Means for solving the problem]

[0007] One aspect of the present invention relates to a light-emitting device, the light-emitting device including a reflecting film, a first electrode, an organic film including a light-emitting layer, a second electrode, and an optical member arranged in this order on a main surface of a substrate, and a bank covering a periphery of the first electrode so as to define a light-emitting region, the light emitting region has a first region and a second region disposed between the bank and the first region, the reflective film, the first electrode, the organic film, and the second electrode form a resonator structure in which light generated in the organic film resonates between the reflective film and the second electrode, and in the light-emitting region, an upper surface of the reflective film is flatter than the first electrode; an optical path length in the first region is different from an optical path length in the second region; The optical member includes a lens through which light from the resonator structure is extracted. Effect of the Invention

[0008] According to the present invention, an advantageous technique is provided for efficiently extracting light of a desired wavelength without reducing color purity. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic plan view showing the configuration of a light emitting device according to a first embodiment. [Diagram 2] FIG. 2 is a plan view of the area enclosed by the dashed line in FIG. 1 . [Diagram 3] FIG. 3 is a schematic cross-sectional view taken along the line AA' in FIG. 2. [Figure 4]FIG. 2A is a schematic cross-sectional view of a sub-pixel of the light-emitting device according to the first embodiment, and FIG. 2B is a schematic cross-sectional view of the sub-pixel of the light-emitting device according to the first embodiment. [Diagram 5] FIG. 2 is a schematic cross-sectional view of a subpixel of the light emitting device according to the first embodiment. [Figure 6] FIG. 11 is a schematic cross-sectional view of a subpixel of a light emitting device according to a second embodiment. [Figure 7] FIG. 11 is a schematic cross-sectional view of a subpixel of a light-emitting device according to a third embodiment. [Figure 8] FIG. 13 is a schematic cross-sectional view of a subpixel of a light emitting device according to a fourth embodiment. [Figure 9] FIG. 13 is a schematic cross-sectional view of a subpixel of a light emitting device according to a fifth embodiment. [Figure 10] FIG. 13 is a schematic cross-sectional view of a subpixel of a light emitting device according to a fifth embodiment. [Figure 11] FIG. 13 is a schematic plan view of a sub-pixel of a light emitting device according to a fifth embodiment. [Figure 12] FIG. 4A is a diagram for explaining interference in a comparative example, and FIG. 4B is a diagram for explaining interference in the first embodiment. [Figure 13] 1 is a schematic cross-sectional view of a light emitting device according to a first embodiment. [Figure 14] 5A is a schematic plan view and FIG. 5B is a schematic cross-sectional view of a light emitting device according to another embodiment. [Figure 15] 2A to 2C are diagrams illustrating a method for manufacturing the light emitting device according to the first embodiment. [Figure 16] 2A to 2C are diagrams illustrating a method for manufacturing the light emitting device according to the first embodiment. [Figure 17] 2A to 2C are diagrams illustrating a method for manufacturing the light emitting device according to the first embodiment. [Figure 18] 2A to 2C are diagrams illustrating a method for manufacturing the light emitting device according to the first embodiment. [Figure 19] FIG. [Figure 20] FIG. [Figure 21] FIG. [Figure 22] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments will be described in detail with reference to the attached drawings. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe a number of features, not all of these features are essential to the invention, and the features may be combined in any manner. Furthermore, in the attached drawings, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0011] Fig. 1 is a plan view of a light emitting device LE of a first embodiment. The plan view is a drawing showing a planar view. The light emitting device LE may be configured as a display device having a display region 1 composed of a plurality of sub-pixels 3 arranged on a main surface of a substrate 100. The plurality of sub-pixels 3 may be classified into a plurality of groups according to the emission color. Although Fig. 1 shows an example in which the plurality of sub-pixels 3 are arranged according to a delta arrangement, the plurality of sub-pixels 3 may be arranged according to other arrangements, for example, a stripe arrangement, a square arrangement, a Pentile arrangement, or a Bayer arrangement.

[0012] FIG. 2 shows an enlarged view of the partial region 2 in FIG. 1. One pixel 15 is composed of a plurality of sub-pixels 3 that emit different light colors. One pixel 15 may be composed of, for example, a sub-pixel 3R that emits red (R) light, a sub-pixel 3G that emits green (G) light, and a sub-pixel 3B that emits blue (B) light. When the sub-pixels 3R, 3G, and 3B are not to be distinguished from one another, they will be described as sub-pixels 3. Each sub-pixel 3 may further include an optical member 19 for collimating light emitted from the light-emitting region of each sub-pixel 3 and emitting it to the outside. In FIG. 2, in a plan view, that is, in a plan view perpendicular to the main surface of the substrate 100, the center of the light-emitting region and the center of the optical member 19 are approximately aligned.

[0013] FIG. 3 is a schematic cross-sectional view of the A-A' plane in FIG. 1 and FIG. 2. The A-A' plane is a plane that crosses three subpixels 3 (3R, 3G, 3B) having different emission colors. The light-emitting region B of each subpixel 3 is defined by an opening of the bank 16. The bank 16 covers the peripheral portion of the first electrode 23 so as to expose the light-emitting region B. The shape of the light-emitting region B is arbitrary, and may be, for example, a circular or elliptical shape, a polygonal shape such as a hexagon or a rectangle, or another shape. Alternatively, a plurality of light-emitting regions may be provided in one subpixel by arranging the openings of the bank 16 so that a plurality of openings are assigned to one subpixel 3. When the light-emitting region has a polygonal shape, for example, the center of the inscribed circle of the polygon can be understood as the center of the light-emitting region. When the light-emitting region B has a circular or elliptical shape, the center of the circle or the ellipse can be understood as the center of the light-emitting region.

[0014] Each sub-pixel 3 is a light-emitting element in which a reflective film 11, a transparent insulating film 22, a first electrode 23, an organic film 12 including a light-emitting film, a second electrode 13, a sealing film 14, and an optical member 19 are arranged in this order on the main surface PS of the substrate 100. Here, a bank 16 is provided to cover the periphery of the first electrode 23 so as to define a light-emitting region B. The bank 16 has an opening that exposes the first electrode 23, and this opening defines the light-emitting region B. A color filter layer 20 may be arranged on the sealing film 14. In addition, a planarization film 24 may be arranged between the sealing film 14 and the color filter layer 20. A drive circuit including a transistor for driving the sub-pixel 3 (light-emitting element) may be arranged on the substrate 100.

[0015] The reflective film 11 may be formed of a metal with high reflectivity, such as Al, Ag, Ti, Mo, W, or an alloy thereof. The reflective film 11 may have a flat upper surface (reflective surface) in the light-emitting region B. The upper surface of the reflective film 11 is substantially parallel to the main surface PS of the substrate 100 (or an approximate plane of the main surface PS) in the light-emitting region B. The upper surface of the reflective film 11 may have a surface roughness of, for example, about several nm, as long as an appropriate reflectivity can be achieved. From one perspective, the upper surface of the reflective film 11 may be flatter than the first electrode 23 (e.g., the upper surface of the first electrode 23) in the light-emitting region B. From another perspective, the upper surface of the reflective film 11 may be flatter than the second electrode 13 (e.g., the upper surface of the second electrode 13) in the light-emitting region B. From yet another perspective, the upper surface of the reflective film 11 may be flatter than the upper surface of the transparent insulating film 22 in the light-emitting region B. Being closer to flat means that the numerical value indicating the flatness is smaller. The flatness can be evaluated as the difference between the maximum and minimum deviations of the surface to be evaluated (here, the upper surface of the reflective film 11) from a reference plane. When the entire surface to be evaluated is on one side of the reference plane and a part of the surface to be evaluated is in contact with the reference plane, the flatness can be evaluated as the maximum deviation of the surface to be evaluated from the reference plane. Flatness can also be interpreted as the absence of steps. For example, in FIG. 3, there are steps in the first electrode but no steps in the reflective film.

[0016] The laminated structure of the first electrode 23, the organic film 12, and the second electrode 13 constitutes an organic light-emitting element or a light-emitting device. The organic film 12 may include a charge transport layer in addition to a light-emitting layer. The light-emitting layer may include a light-emitting material. By applying a voltage between the first electrode 23 and the second electrode 13, charges can be injected into the organic film 12. The injected charges are recombined in the light-emitting layer, and the fluorescent material in the light-emitting layer emits light, so that light can be emitted to the outside. Known materials can be used as the material of the charge transport layer and the material of the light-emitting material in the organic film 12. The light-emitting material may be a fluorescent material or a phosphorescent material, and may include multiple materials. In one example, the light-emitting layer is configured to generate approximately white light, and for example, the light-emitting layer is configured of multiple layers, and each layer may include red, green, and blue fluorescent materials. The reflective film 11, the transparent insulating film 22, the first electrode 23, the organic film 12, and the second electrode 13 form a resonator structure that causes light generated in the organic film 12 to resonate between the reflective film 11 and the second electrode 13. The transparent insulating film 22 has different thicknesses (maximum thickness or average thickness) in the sub-pixels 3R, 3G, and 3B. The transparent insulating film 22 can be made of, for example, an inorganic material such as SiO2 or SiN, or a transparent resin such as polyimide. The bank 16 can be made of, for example, an inorganic material such as SiO2 or SiN, or a transparent resin such as polyimide.

[0017] 4(a) representatively shows the reflective film 11, the transparent insulating film 22, the first electrode 23, the organic film 12, and the second electrode 13 of one of the three types of subpixels 3 in FIG. 3. The resonator structure of each subpixel 3 can be configured to have a plurality of optical path lengths different from each other. For example, the reflective film 11, the transparent insulating film 22, the first electrode 23, the organic film 12, and the second electrode 13 can be arranged to define a plurality of optical path lengths different from each other. The plurality of optical path lengths different from each other in one subpixel 3 can be realized, for example, by configuring the second electrode 13 to have at least one (or a plurality of) steps in the light-emitting region B defined by the bank 16.

[0018] At least one step in (the lower surface or the upper surface of) the second electrode 13 can be realized by providing at least one step in (the upper surface of) the transparent insulating film 22. Specifically, by providing at least one step in (the upper surface of) the transparent insulating film 22, at least one step can be formed in (the upper surface of) the first electrode 23 so as to imitate at least one step in the transparent insulating film 22. Similarly, at least one step can be formed in (the upper surface of) the organic film 12 so as to imitate at least one step in (the upper surface of) the first electrode 23. Similarly, at least one step can be formed in (the lower surface or the upper surface of) the second electrode 13 so as to imitate at least one step in (the upper surface of) the organic film 12. In other words, by providing at least one step in the transparent insulating film 22, at least one step can be formed in (the lower surface or the upper surface of) the second electrode 13 so as to imitate at least one step in the transparent insulating film 22.

[0019] The first electrode 23 is preferably made of a material having a high transmittance of light (especially visible light). The first electrode 23 may be made of, for example, ITO, IZO, or IGZO, which is a transparent oxide conductor. The first electrode 23 may be formed by a sputtering method, a CVD method, or the like. The first electrode 23 may be electrically connected to the circuit of the substrate 100 via contact parts 201, 200. The contact parts 201, 200 may be formed of, for example, W, Ti, TiN, or the like. Instead of the contact parts 201, 200, a contact part may be provided on the reflective film 11 to serve as a reflective film and an electrode. The reflective film 11 may be provided for every two or more pixels, or may be provided in common to all pixels, as exemplified in FIG. 13.

[0020] The organic film 12 can be formed by a known film forming method such as a vacuum deposition method, an inkjet method, or a spin coating method. In particular, it is preferable to adopt a vacuum deposition method that is easy to form a film so as to follow the steps of the base (the first electrode 23 and the bank 16). However, as long as the film is formed so as to follow the steps of the base, the film may be formed by a film forming method other than the vacuum deposition method. In the light-emitting region B, the second electrode 13 may include a first region C1 corresponding to the optical path length L1 and a second region C2 corresponding to the optical path length L2. The second region C2 is a region outside the first region C1. The first region C1 may be a region including the center part of the second electrode 13 in a plan view. In addition, the optical path length L2 is longer than the optical path length L1. Here, the second electrode 13 is described as including the first region C1 and the second region C2, but the light-emitting region B may be understood as including the first region C1 and the second region C2. Alternatively, the first electrode 23 may be understood to include a first region C1 and a second region C2.

[0021] The contact portions 201, 200 may be disposed outside the second region C2 as illustrated in Fig. 4(a) in a plan view, i.e., in a plan view from a direction perpendicular to the main surface of the substrate 100. Alternatively, the contact portions 201, 200 may be disposed in the first region C1 as illustrated in Fig. 4(b) in a plan view, i.e., in a plan view from a direction perpendicular to the main surface of the substrate 100. Alternatively, the contact portions 201, 200 may be disposed in the second region C2 as illustrated in Fig. 4(a) in a plan view, i.e., in a plan view from a direction perpendicular to the main surface of the substrate 100.

[0022] FIG. 11(a) illustrates a plan view (planar view) of the subpixel 3 illustrated in FIG. 4(a) and FIG. 4(b). FIG. 11(b) illustrates an example in which a resonator structure having a plurality of regions that realize a plurality of different optical path lengths in the light-emitting region is provided in all of the RGB subpixels 3 that constitute the pixel 15. In one subpixel, the first region C1 defines an optical path length that reinforces desired wavelengths suitable for the emission color of the subpixel, and the second region C2 defines an optical path length longer than the first region C1. In another subpixel, the first region C3 defines an optical path length that reinforces desired wavelengths suitable for the emission color of the subpixel, and the second region C4 defines an optical path length longer than the first region C3. In yet another subpixel, the first region C5 provides an optical path length that reinforces desired wavelengths suitable for the emission color of the subpixel, and the second region C6 provides an optical path length longer than the first region C5. Here, the second regions C2, C4, and C6 are regions outside the first regions C1, C3, and C5, respectively. In any subpixel, the second region disposed on the outside defines a longer optical path length than the first region disposed on the inside. As illustrated in FIGS. 11(a) and 11(b), the first region disposed on the inside may have a circular shape, and the second region disposed on the outside may have a ring shape surrounding the first region. Alternatively, the first region disposed on the inside may have an elliptical shape, and the second region disposed on the outside may have a ring shape surrounding the first region. Alternatively, as illustrated in FIG. 11(d), the first region disposed on the inside may have a rectangular shape, and the second region disposed on the outside may have a frame shape surrounding the first region.

[0023] The sealing film 14 may be made of, for example, SiN, SiON, or SiOx. The sealing film 14 may be formed by, for example, a CVD method. The sealing film 14 may be made of a multilayer film including at least one layer of an atomic deposition layer (ALD) and a resin film in addition to an SiN film or a SiON film. A planarization film 24 may be disposed on the sealing film 14. By providing the planarization film 24, the color filter layer 20 and the optical member 19 disposed on the sealing film 14 can be formed more stably. The planarization film 24 may be formed by forming a transparent resin by a coating method. Alternatively, the planarization film 24 may be formed by forming a film of a transparent inorganic material and then planarizing it by a chemical mechanical polishing method (CMP) or the like. A color filter layer 20 corresponding to the emission color of each subpixel may be disposed on the planarization film 24. The color filter layer 20 may be made of a known material, and by providing the color filter layer 20, the color purity emitted from the light emitting device LE can be further improved. The color filter layer 20 includes color filters 20r, 20g, and 20b corresponding to each subpixel. By making the thicknesses of the color filters 20r, 20g, and 20b approximately the same, the optical member 19 can be formed on the color filter layer 20 more stably.

[0024] The optical member 19 may be a collimator for collimating the light emitted from the light-emitting region of each sub-pixel 3 and emitting it to the outside. The optical member 19 may be provided for each sub-pixel 3. The optical member 19 may be a lens or a microlens having a surface (for example, a spherical surface) in contact with air. The microlens as the optical member 19 may be made of, for example, a resin such as an acrylic resin or an epoxy resin, or may be made of an inorganic material such as SiN or SiO. By providing the optical member 19, it is possible to increase the amount of light extracted from the light-emitting element to the outside and control the direction of the extracted light. When the microlens as the optical member 19 has a hemispherical shape, the tangent line that is parallel to the upper surface of the planarization film 24 among the tangent lines that are in contact with the hemisphere and the microlens is the apex of the microlens. The apex of the microlens can be determined in the same manner in any cross-sectional view. In other words, the tangent line that is parallel to the upper surface of the planarization film 24 among the tangent lines that are in contact with the surface of the microlens in the cross-sectional view and the microlens is the apex of the microlens.

[0025] The shape of the microlens can be controlled by adjusting the exposure and development processes. Specifically, a photoresist film is formed, exposed to light using a photomask having a continuous gradation change, and developed. As such a photomask, a gray mask or an area gradation mask can be used. The area gradation mask forms a light intensity distribution having a continuous gradation on the imaging surface by changing the density distribution of dots made of a light-shielding film that is less than the resolution of the exposure device. The lens shape may also be adjusted by performing an etch-back on the microlens obtained through the exposure and development processes. The shape of the microlens may have a curved surface that can refract the emitted light, and may be spherical or aspherical, or may have an asymmetric cross-sectional shape.

[0026] Next, the resonator structure will be described with reference to FIG. 5 and FIG. 12. As illustrated in FIG. 5, the light emitting element constituting the subpixel constitutes a resonator (interferometer) structure having different characteristics in the central region C1 and the outer region C2 of the first electrode 13 (or light emitting region). The optical path length L2 in the outer region C2 is longer than the optical path length L1 in the central region C1. FIG. 12(a) shows a schematic diagram of the resonator structure of a comparative example, and FIG. 12(b) shows a schematic diagram of the resonator structure of this embodiment. As shown in FIGS. 12(a) and (b), among the light incident on the optical member 19, the light E2' and E2 collimated from the end of the optical member 19 toward the front direction (substrate normal direction) are light emitted obliquely from the end of the light emitting region. This is because the optical member 19 is in contact with air (refractive index n0=1) and the optical member 19 (refractive index n1>1) is a convex lens. In Fig. 12(a) and (b), for simplification, the reflective film 11 and the second electrode 13 of the light-emitting element are shown. Between the reflective film 11 and the second electrode 13, the transparent insulating film 22, the first electrode 23, and the organic film 12 are arranged, which are media in the optical path. The light-emitting element has a light-emitting point near the center thereof as 41, and a light-emitting point at an outer position as 40. In Fig. 12(a) and (b), in the interference design at the light-emitting point 41, the optical path length L1 can be determined so that the light of a desired wavelength is intensified in the light E1 emitted from the optical member 19 in the substrate normal direction (the normal direction of the main surface PS of the substrate 100). If the wavelength (resonant wavelength) at which the resonator structure resonates is λ1, the optical path length can be set to comply with the formula (1).

[0027] L*cos(θ eml )=(2m-Φ / π)×(λ / 4) (1) m is an integer equal to or greater than 0. Φ is the sum of the phase shifts when light of wavelength λ is reflected by the upper surface of the reflective film 11 and the lower surface of the second electrode 13 (defined as a negative value). θ eml is the emission angle of the light emitted from the light emitting point with respect to the substrate normal.

[0028] Therefore, if light E1 is light of a desired wavelength λ1, L1 = (2m-Φ / π) × (λ1 / 4), (θ eml =0) (2) It is sufficient to set L1 so that

[0029] Moreover, if you transform this, λ1=4 / (2m-Φ / π))xL1 (3) On the other hand, under this condition, the light E2' in FIG. 12(a) has a θ eml >0 light is emitted, so from equation (1) L1xcos(θ eml )=(2m-Φ / π)×(λ / 4) (4) This is further transformed into λ=(4 / (2m-Φ / π))xL1xcos(θ eml ) (5) It becomes.

[0030] Here, cos(θ eml )<1, it follows from equation (3) that the λ of the emitted light E2' is smaller than λ1.

[0031] 12(a), the light extracted in the substrate normal direction is light E1 to E2', so if the light E1 is designed to be extracted as the desired light, light other than the desired wavelength, such as light E2', will be extracted. Therefore, in the comparative example of FIG. 12(a), the color purity of the observed emitted color decreases, and light of the desired wavelength cannot be extracted efficiently.

[0032] In contrast, in the present embodiment shown in FIG. 12(b), the light E2 is light from the region where L2>L1. Here, L2xcos(θ eml )=(2m-Φ / π )×(λ1 / 4) (6) By setting L2 to satisfy θ eml It is therefore possible to set the resonant wavelength of the light radiated at this angle to λ1. Therefore, the light extracted by the configuration of Fig. 12(b) according to this embodiment is light E1 to E2 with wavelength λ1, and light with the desired wavelength λ1 can be efficiently extracted without reducing color purity.

[0033] As shown in FIG. 5, light E2 is emitted from point P of optical member 19. A perpendicular line 42 passing through point P can be considered at tangent line 43 touching point P. Light E2 forms an angle θ2 with perpendicular line 42. Similarly, angle θ1 made by a ray of light from the light-emitting element incident on point P can be derived. In addition, angle θ1' made by the ray of light from the light-emitting element incident on point P and light E2 can be obtained. Finally, the radiation angle θ of the light-emitting element to become light E2 can be calculated from Snell's law. eml From equation (7), θ eml can be estimated.

[0034] n1xsin(θ1')=n eml xsin(θ eml ) (7) Here, n1 is the refractive index of the optical member 19, and n eml is the refractive index of the light-emitting layer.

[0035] n eml If n1 is 1.8 and n2 is 1.5, then θ eml is 10 to 30 degrees.

[0036] Therefore, θ eml When θ = 10 to 30°, eml To resonate the same resonant wavelength λ1 as =0°, from equations (2) and (6), L2 = L1 / cos(θ eml ) (8) Therefore, if ΔL=L2-L1, ΔL is approximately (0.015~0.15)xL1.

[0037] For example, when λ1=530 nm and m=1, the optical path length L1 is approximately equal to the wavelength λ1, and if the refractive index at the optical path length L1 is approximately 1.8, the physical film thickness is approximately 294 nm. Therefore, the film thickness of the transparent insulating film 22 should be set so that the difference between ΔL is 4 nm or more and 44 nm or less.

[0038] Similarly, when λ1=450 nm and m=1, the difference in ΔL is 3.8 nm or more and 38 nm or less. When λ1=630 nm and m=1, the difference in ΔL is 5.3 nm or more and 53 nm or less. Since ΔL can vary depending on the refractive index dispersion of each film, more specifically, the optical path lengths L1 and L2 can be set according to the desired wavelength by setting the physical film thickness of the transparent insulating film 22 taking into consideration the refractive index of each film. Also, if ΔL is within the above range (4 nm or more and 53 nm or less), the steps can be the same thickness for the R, G, and B subpixels.

[0039] Furthermore, this embodiment does not need to be applied to all of the R, G, and B sub-pixels that constitute the pixel 15, and may be applied to only one color, such as only R, only G, or only B.

[0040] If the emission angle of the light emitted from the organic light-emitting element (subpixel 3) is within a range of about 10° with respect to the substrate normal, the light has the same optical characteristics as the light emitted in the substrate normal direction (vertical). Therefore, when this light is emitted to the outside from the optical member 19, it is preferable that the first region C1 is within a range of 10% or more and 90% or less of the combined area of ​​the first region C1 and the second region C2. This allows the light of the first region C1 to be effectively emitted from the optical member 19, thereby suppressing the decrease in color purity and achieving highly efficient light emission.

[0041] Furthermore, by adjusting the shape of the optical member 19, the second region C2 can be made larger than the first region C1, and it becomes possible to efficiently and effectively extract the light from the first region C1 (resonant wavelength region) and the light obliquely emitted from the second region C2. In this case, it is preferable that the area of ​​the first region C1 is within a range of 10% or more and less than 50% of the total area of ​​the first region C1 and the second region C2.

[0042] Hereinafter, an outline of a manufacturing method of the light emitting device LE of the first embodiment will be described with reference to Figs. 15, 16, 17, and 18. In step S1, a substrate 100 on which a driving circuit is formed is prepared, and a material film of the reflective film 11 is formed on the main surface (upper surface) PS of the substrate 100. Next, in step S2, the material film of the reflective film 11 is patterned by a photolithography process to form the reflective film 11. Next, in step S3, a transparent insulating film 22 is formed so as to cover the reflective film 11, and a photoresist film 31 is formed thereon. Next, in step S4, the transparent insulating film 22 is patterned by dry etching using the photoresist film 31 as an etching mask.

[0043] Next, in step S5, a further transparent insulating film 22 is formed on the patterned transparent insulating film 22, and a photoresist film 31 is formed thereon. Next, in step S6, the transparent insulating film 22 is patterned by dry etching using the photoresist film 31 as an etching mask. Next, in step S7, a further transparent insulating film 22 is formed on the patterned transparent insulating film 22.

[0044] Next, in step S8, a photoresist film 31 is formed to process the transparent insulating film 22 so that the transparent insulating film 22 has a step in the light-emitting region of each subpixel. Next, in step S9, the transparent insulating film 22 is dry-etched using the photoresist film 31 as an etching mask. As a result, the transparent insulating film 22 is shaped so as to have a step in the light-emitting region of each subpixel. Next, in step S10, a material film of the first electrode 23 is formed on the transparent insulating film 22 with the step formed therein.

[0045] Next, in step S11, the material film for first electrode 23 is patterned by a photolithography process to form first electrode 23. The upper surface of first electrode 23 has a step that matches the step on the upper surface of transparent insulating film 22. Next, in step S12, a material film for bank 16 is formed so as to cover transparent insulating film 22 and first electrode 23, and then patterned to form bank 16.

[0046] Thereafter, on the first electrodes 23 and the banks 16, the organic film 12 including a light-emitting layer, the second electrodes 13, the sealing film 14, the planarizing film 24, the color filter layer 20, and the optical members 19 are formed in this order.

[0047] The light emitting device LE of the second embodiment will be described below. Matters not mentioned as the second embodiment may follow the first embodiment. FIG. 6 shows a schematic configuration of the light emitting device of the second embodiment. The light emitting device of the second embodiment has a configuration in which the optical member 19 in the light emitting device of the first embodiment is turned upside down and placed on the sealing film 14 via the resin film 30. Note that a color filter layer 20 may be placed between the sealing film 14 and the optical member 19. The refractive index n3 of the resin film 30 is smaller than the refractive index n1 of the optical member 19. With this configuration, the light from the light emitting points 40 and 41 of the light emitting element can be collimated and emitted from the light emitting device, as in the first embodiment. In addition, the angle θ of the light emitted from the light emitting region C2 can be reduced. eml The light E2 emitted at the light emitting device can be extracted to the outside.

[0048] Hereinafter, the light emitting device LE of the third embodiment will be described. Matters not mentioned as the third embodiment may follow the first or second embodiment. In the third embodiment, the resonator structure of each subpixel 3 is configured to have three or more optical path lengths different from each other. FIG. 7 shows a schematic configuration of the light emitting device of the third embodiment. The second electrode 13 (or the light emitting region B) of each subpixel may include a first region C1 corresponding to the optical path length L6, a second region C7 corresponding to the optical path length L7, and a third region C8 corresponding to the optical path length L8. The second region C7 is a region outside the first region C6, and the third region C8 is a region outside the second region C7. In addition, the optical path length L7 is longer than the optical path length L6, and the optical path length L8 is longer than the optical path length L7. The optical path lengths L6, L7, and L8 and the shape of the optical member 19 may be set according to the wavelength of the light extracted from the light emitting device, etc.

[0049] The light emitting device LE of the fourth embodiment will be described below. Matters not mentioned as the fourth embodiment may follow the first or second embodiment. FIG. 8 shows a schematic configuration of the light emitting device of the fourth embodiment. In the fourth embodiment, the resonator structure of each sub-pixel 3 has a structure in which the optical path length changes continuously. The transparent insulating film 22 may have an upper surface in the shape of a concave lens surface, for example, as a curved or inclined surface.

[0050] The second electrode 13 (its lower surface or upper surface) may have a concave lens surface shape as a curved surface or an inclined surface. The curved surface or inclined surface of the second electrode 13 (its lower surface or upper surface) may be realized by providing a curved surface or an inclined surface on the transparent insulating film 22 (its upper surface). Specifically, by providing a curved surface or an inclined surface on the transparent insulating film 22 (its upper surface), the first electrode 23 (its upper surface) may have a curved surface or an inclined surface formed so as to imitate the curved surface or inclined surface of the transparent insulating film 22. Similarly, the organic film 12 (its upper surface) may have a curved surface or an inclined surface formed so as to imitate the curved surface or inclined surface of the first electrode 23 (its upper surface). Similarly, the second electrode 13 (its lower surface or upper surface) may have a curved surface or an inclined surface formed so as to imitate the curved surface or inclined surface of the organic film 12 (its upper surface). In other words, by providing the transparent insulating film 22 with a curved or inclined surface, the second electrode 13 (its lower or upper surface) can be formed with a curved or inclined surface that follows the curved or inclined surface of the transparent insulating film 22.

[0051] Hereinafter, the light emitting device LE of the fifth embodiment will be described. Matters not mentioned as the fifth embodiment may follow the first to fifth embodiments. FIG. 9, FIG. 10, and FIG. 11(c) and (f) show the configuration of the light emitting device of the fifth embodiment. In the light emitting device of the fifth embodiment, the pixel 15 may be composed of four or more subpixels. The pixel 15 may include, for example, a blue subpixel having light emitting regions C1 and C2, a green subpixel having light emitting regions C3 and C4, a red subpixel having light emitting regions C5 and C6, and a white subpixel having light emitting regions D1 and D2. The blue subpixel, the green subpixel, and the red subpixel may have the same configuration as the first and second embodiments, for example. The four subpixels may have a rectangular shape, as exemplified in FIG. 11(f).

[0052] The white subpixel will be described with reference to FIG. 9 and FIG. 10. The second electrode 13 (or the light-emitting region B) may include a first region D1 corresponding to the optical path length L4 and a second region D2 corresponding to the optical path length L5. The second region D2 is a region outside the first region D1. The optical path length L5 is shorter than the optical path length L4. In this arrangement, the wavelength of the light extracted from the second region D2 is shorter than the wavelength of the light extracted from the first region D1. Furthermore, as shown in FIG. 10, the light E4 emitted from the point P of the optical member 19 is light obliquely emitted from the light-emitting point 40 of the first region D2. Therefore, the wavelength of the light E4 extracted from the point P is shorter than the resonance wavelength of the first region D1. When the light-emitting element emits white light, light with a yellow wavelength, which is a combination of red and green wavelengths, can be extracted from the first region D1, and light with a shorter blue wavelength can be extracted from the second region D2. Therefore, a desired white color can be efficiently obtained from the white sub-pixel by utilizing the complementary color relationship between yellow and blue.

[0053] If the resonant wavelength at the optical path length L4 is 590 nm, m=1, and the refractive index is 1.8, the physical film thickness at the optical path length L4 is about 328 nm. In addition, if the resonant wavelength at the optical path length L5 is λ2=450 nm, then from equation (6), L5xcos(θ eml )=(2m-Φ / π)×(λ2 / 4) (9) It can be expressed as θ eml When m is 10 to 30° and m=1, the optical path length L5 is generally 380 to 445 nm. Therefore, if the refractive index of the optical path length L2 is 1.8, the physical film thickness of the optical path length L2 may be 210 to 250 nm. Therefore, the transparent insulating film 22 in the second region D2 may be designed to be thinner than the transparent insulating film 22 in the first region D1 so that the difference in physical film thickness between the optical path length L5 and the optical path length L4 is 78 to 118 nm.

[0054] As a modification of the fifth embodiment, the steps can be made to have three or more steps as in the third and fourth embodiments, or the transparent insulating film 22 can be made to have a convex shape so that the thickness of the transparent insulating film 22 can be changed continuously.

[0055] Other embodiments will be described below.

[0056] 11(e), the pixel 15 may have a rectangular shape, and the second electrode 13 (or the light-emitting region B) of the subpixel may include a first region C1, a second region C2, and a third region C2'. The optical path length L1 of the first region C1, the optical path length L2 of the second region C2, and the optical path length L2' of the third region C2' may have a relationship of L2>L2'>L1.

[0057] FIG. 14 illustrates the relative positions of the optical member 19 and another component (reflective film 11) of the subpixel 3. Here, FIG. 14(a) is a plan view of the display region 1 of the light-emitting device LE, and FIG. 14(b) is a schematic cross-sectional view of the F-F' plane in FIG. 14(a). FIG. 14(b) illustrates the relationship between the relative positions of the center of the optical member 19 and the center of the reflective film 11 (or the light-emitting region B) and the position of the light-emitting element in the display region. At the center position of the display region 1, the center of the optical member 19 and the center of the reflective film 11 (or the light-emitting region B) coincide with each other. Meanwhile, as indicated by the reference numerals 90, 91, 92, and 93, the distance between the center of the optical member 19 and the center of the reflective film 11 (or the light-emitting region B) increases with increasing distance from the center of the display region 1.

[0058] Note that the change in the distance between the center of the optical member 19 and the center of the reflective film 11 (or the light-emitting region B) in FIG. 14(b) is merely an example. For example, the distance between the center of the optical member 19 and the center of the reflective film 11 (or the light-emitting region B) may become smaller as it moves away from the center of the display region 1. The distance between the center of the optical member 19 and the center of the reflective film 11 (or the light-emitting region B) may be designed to change continuously macroscopically according to the position of the display region 1. As long as it is continuous macroscopically, it may be changed for each individual light-emitting element, or may be changed stepwise for each of a plurality of light-emitting elements. Alternatively, a form in which the distance is changed for each light-emitting element and a form in which the distance is changed stepwise for each of a plurality of light-emitting elements may be combined. In this way, the angle of the light emitted from the optical member 19 can be controlled within the display region.

[0059] The light emitting device of the present invention can be applied to a display device or a lighting device, or may be applied to an exposure light source of an electrophotographic image forming apparatus or a backlight of a liquid crystal display device.

[0060] The display device may include an image input unit that receives image information from an image input device such as an area CCD, a linear CCD, or a memory card, an information processing unit that processes the image information, a display unit, and a display control unit that displays an image generated by the information processing unit on the display unit. The display unit may be configured with the light-emitting device of the present invention.

[0061] The light-emitting device of the present invention may be applied to an imaging device or a printer. The display unit of the imaging device or the printer may have a touch panel function. The driving method of this touch panel function may be an infrared type, a capacitance type, a resistive film type, an electromagnetic induction type, or other type.

[0062] Application examples of the above-mentioned light emitting device will now be described.

[0063] FIG. 19 exemplarily illustrates the configuration of an imaging device 1100 incorporating a light-emitting device typified by the above-mentioned embodiment. The imaging device 1100 may have a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The imaging device may be called a camera. Alternatively, the imaging device may be incorporated in an electronic device such as a computer. The light-emitting device typified by the above-mentioned embodiment may be applied to the viewfinder 1101, which is a display unit. The viewfinder 1101 may display not only an image captured by an imaging element, 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 moving speed of the subject, and the possibility that the subject will be blocked by an obstruction.

[0064] The imaging device 1100 has an optical section (not shown). The optical section has multiple lenses, and forms an image on an imaging element (not shown) housed in a housing 1104 that receives light that has passed through the optical section. The focal point of the multiple lenses can be adjusted by adjusting their relative positions. This operation can also be performed automatically.

[0065] The light-emitting device typified by the above-mentioned embodiment may be applied to the display unit of an electronic device. In that case, it may have both a display function and an operation function. Examples of the portable terminal include a mobile phone such as a smartphone, a tablet, and a head-mounted display.

[0066] FIG. 20 is a schematic diagram showing an example of an electronic device incorporating a light-emitting device typified by the above-mentioned embodiment. The electronic device 1200 has a display unit 1201, an operation unit 1202, and a housing 1203. 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 touch panel type reaction unit. The operation unit 1202 may be a biometric recognition unit that recognizes a fingerprint and performs unlocking or the like. A portable device having a communication unit can also be called a communication device. A light-emitting device typified by the above-mentioned embodiment can be applied to the display unit 1201.

[0067] 21(a) and (b) show application examples of the light-emitting device typified by the above-mentioned embodiment. FIG. 21(a) shows a display device such as a television monitor or a PC monitor. The display device 1300 has a frame 1301 and a display unit 1302. The light-emitting device typified by the above-mentioned embodiment can be applied to the display unit 1302. The display device 1300 may have a base 1303 that supports the frame 1301 and the display unit 1302. The base 1303 is not limited to the form shown in FIG. 21(a). For example, the lower side of the frame 1301 may also serve as the base 1303. The frame 1301 and the display unit 1302 may be curved. The radius of curvature may be 5000 mm or more and 6000 mm or less.

[0068] FIG. 21(b) shows another application example of the light-emitting device represented by the above embodiment. The display device 1310 of FIG. 21(b) is configured to be bendable, and is a so-called foldable display device. The display device 1310 has a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The light-emitting device represented by the above 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 display unit without a joint. The first display unit 1311 and the second display unit 1312 can be separated by the bending point. The first display unit 1311 and the second display unit 1312 may display different images, or the first display unit and the second display unit may display one image.

[0069] 22 shows another example of an electronic device incorporating a light-emitting device typified by the above-mentioned embodiment. The light-emitting device typified by the above-mentioned embodiment can be applied to wearable devices such as smart glasses, HMD, and smart contacts. An image-capturing and displaying device used in such an application example has an image-capturing device capable of photoelectrically converting visible light, and a displaying device capable of emitting visible light.

[0070] 22(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 side of a lens 1601 of the glasses 1600. In addition, a light emitting device according to each of the above-mentioned embodiments is provided on the back side of the lens 1601.

[0071] The glasses 1600 further include a control device 1603. The control device 1603 functions as a power source that supplies power to the image capture device 1602 and the display device according to each embodiment. The control device 1603 also controls the operations of the image capture device 1602 and the display device. The lens 1601 is formed with an optical system for focusing light on the image capture device 1602.

[0072] FIG. 22(b) illustrates glasses 1610 (smart glasses) according to one application example. The glasses 1610 have a control device 1612, and the control device 1612 is equipped with an imaging device equivalent to the imaging device 1602 and a display device. The lens 1611 is formed with an optical system for projecting light emitted from the imaging device in the control device 1612 and the display device, and an image is projected onto the lens 1611. The control device 1612 functions as a power source for supplying power to the imaging device and the display device, and controls the operation of the imaging device and the display device. The control device may have a line-of-sight detection unit that detects the line of sight of the wearer. Infrared light may be used for detecting the line of sight. The infrared light emitting unit emits infrared light toward the eyeball of a user gazing at a display image. An imaging unit having a light receiving element detects the reflected light of the emitted infrared light from the eyeball, thereby obtaining an image of the eyeball. By having a reduction means for reducing light from the infrared light emitting unit to the display unit in a planar view, deterioration of image quality is reduced.

[0073] The gaze of the user with respect to the displayed image is detected from an image of the eyeball obtained by capturing infrared light. Any known method can be applied to gaze detection using the image of the eyeball. As an example, a gaze detection method based on a Purkinje image formed by reflection of irradiated light on the cornea can be used.

[0074] More specifically, the gaze detection process is performed based on the pupil-corneal reflex method. Using the pupil-corneal reflex method, a gaze vector that indicates the direction (rotation angle) of the eyeball is calculated based on the pupil image and the Purkinje image included in the captured image of the eyeball, thereby detecting the user's gaze.

[0075] A light emitting device according to an embodiment of the present invention may have an imaging device having a light receiving element, and may control a display image on a display device based on information on a user's line of sight from the imaging device.

[0076] Specifically, the display device determines a first field of view area to which the user gazes and a second field of view area other than the first field of view area based on the line-of-sight information. The first field of view area and the second field of view area may be determined by a control device of the display device, or may be received from an external control device. In the display area of ​​the display device, the display resolution of the first field of view area may be controlled to be higher than the display resolution of the second field of view area. In other words, the resolution of the second field of view area may be lower than that of the first field of view area.

[0077] The display area includes a first display area and a second display area different from the first display area, and an area having a high priority is determined from the first display area and the second display area based on line-of-sight information. The first field of view area and the second field of view area may be determined by a control device of the display device, or may be determined by an external control device and received. The resolution of the area having a high priority may be controlled to be higher than the resolution of areas other than the area having a high priority. In other words, the resolution of an area having a relatively low priority may be lowered.

[0078] AI may be used to determine the first field of view area and the area with high priority. The AI ​​may be a model configured to estimate the angle of the line of sight and the distance to an object at the end of the line of sight from the image of the eyeball, using the image of the eyeball and the direction in which the eyeball in the image was actually looking as teacher data. The AI ​​program may be included in the display device, the imaging device, or an external device. If included in the external device, it is transmitted to the display device via communication.

[0079] When display control is performed based on visual recognition detection, the present invention is preferably applicable to smart glasses that further include an imaging device for capturing images of the outside world. The smart glasses can display captured outside information in real time.

[0080] The present disclosure includes the following configurations. [Configuration 1] A light-emitting device comprising: a reflective film, a first electrode, an organic film including a light-emitting layer, a second electrode, and an optical member disposed in this order on a main surface of a substrate; and a bank covering a periphery of the first electrode so as to define a light-emitting region, the reflective film, the first electrode, the organic film, and the second electrode form a resonator structure in which light generated in the organic film resonates between the reflective film and the second electrode; In the light emitting region, an upper surface of the reflective film is flatter than the first electrode, The resonator structure has a plurality of optical path lengths different from each other. A light emitting device characterized by: [Configuration 2] the light emitting region includes a first region and a second region located outside the first region, and an optical path length in the second region is longer than an optical path length in the first region; 2. The light emitting device according to configuration 1. [Configuration 3] a difference between a physical film thickness determining the optical path length in the second region and a physical film thickness determining the optical path length in the first region is 4 nm or more and 53 nm or less; 3. The light emitting device according to configuration 1 or 2. [Configuration 4] The area of ​​the first region is in the range of 10% to 90% of the sum of the area of ​​the first region and the area of ​​the second region. 3. The light emitting device according to configuration 2. [Configuration 5] The area of ​​the first region is smaller than the area of ​​the second region. 3. The light emitting device according to configuration 2. [Configuration 6] The area of ​​the first region is within a range of 10% or more and less than 50% of the sum of the area of ​​the first region and the area of ​​the second region. 6. The light emitting device according to configuration 2, 4 or 5. [Configuration 7] the light emitting region includes a first region and a second region located outside the first region, and an optical path length in the second region is shorter than an optical path length in the first region; 7. The light emitting device according to any one of configurations 1 to 6. [Configuration 8] a difference between a physical film thickness determining the optical path length in the first region and a physical film thickness determining the optical path length in the second region is 78 nm or more and 118 nm or less; 8. The light emitting device according to configuration 7. [Configuration 9] the reflective film, the first electrode, the organic film, and the second electrode are arranged so as to define the plurality of optical path lengths different from one another. 9. The light emitting device according to any one of configurations 1 to 8. [Configuration 10] A light-emitting device having a resonator structure in which a first electrode, an organic film including a light-emitting layer, a second electrode, and an optical member are disposed in this order on a main surface of a substrate, and light from the light-emitting layer is resonated, the first electrode includes a first region including a central portion of the first electrode in a plan view, and a second region disposed outside the first region in a plan view; an optical path length of the resonator structure in the second region is longer than an optical path length of the resonator structure in the first region; A light emitting device characterized by: [Configuration 11] A reflective film is provided between the main surface of the substrate and the first electrode. 11. The light emitting device according to configuration 10. [Configuration 12] The area of ​​the first region is in the range of 10% to 90% of the sum of the area of ​​the first region and the area of ​​the second region. 12. The light emitting device according to claim 10 or 11. [Configuration 13] The area of ​​the first region is smaller than the area of ​​the second region. 13. The light emitting device according to any one of configurations 10 to 12. [Configuration 14] The area of ​​the first region is within a range of 10% or more and less than 50% of the sum of the area of ​​the first region and the area of ​​the second region. 14. The light emitting device according to any one of configurations 10 to 13. [Configuration 15] The optical member includes a collimator. 15. The light emitting device according to any one of configurations 1 to 14. [Configuration 16] the second electrode has a plurality of regions, and the distances between the lower surface of each of the plurality of regions and the upper surface of the reflective film are different from one another; 16. The light emitting device according to any one of configurations 1 to 15. [Configuration 17] The second electrode has at least one step. 17. The light emitting device according to claim 16, [Configuration 18] the organic film has at least one step, and the at least one step of the second electrode follows the at least one step of the organic film; 18. The light emitting device according to claim 17. [Configuration 19] the first electrode has at least one step, and the at least one step of the organic film follows the at least one step of the first electrode; 19. The light emitting device according to configuration 18. [Configuration 20] a transparent insulating film is provided between the reflective film and the first electrode, the transparent insulating film has at least one step, and the at least one step of the first electrode is aligned with the at least one step of the transparent insulating film; 20. The light emitting device according to claim 19, [Configuration 21] The plurality of regions includes a first region having a circular shape and a second region having a ring shape surrounding the first region. 17. The light emitting device according to claim 16, [Configuration 22] The light emitting region has a polygonal shape. 22. The light emitting device according to claim 21. [Configuration 23] The plurality of regions includes a rectangular first region and a frame-shaped second region surrounding the first region. 17. The light emitting device according to claim 16, [Configuration 24] The second electrode has a curved or inclined surface. 8. The light emitting device according to configuration 7. [Configuration 25] the organic film has a curved or inclined surface, and the inclined surface of the second electrode conforms to the curved or inclined surface of the organic film; 25. The light emitting device according to claim 24. [Configuration 26] the first electrode has a curved or inclined surface, and the curved or inclined surface of the organic film conforms to the curved or inclined surface of the first electrode; 26. The light emitting device according to claim 25. [Configuration 27] the transparent insulating film has a curved or inclined surface, and the curved or inclined surface of the first electrode conforms to the curved or inclined surface of the transparent insulating film; 21. The light emitting device according to configuration 20. [Configuration 28] a first sub-pixel including the reflective film, the transparent insulating film, the first electrode, the organic film, and the second electrode, and a second sub-pixel including the reflective film, the transparent insulating film, the first electrode, the organic film, and the second electrode, a thickness of the transparent insulating film of the first subpixel is different from a thickness of the transparent insulating film of the second subpixel; 21. The light emitting device according to configuration 20. [Configuration 29] an upper surface of the reflective film is parallel to a main surface of the substrate in the light emitting region; 29. The light emitting device according to any one of configurations 1 to 28. [Configuration 30] The organic film generates white light. 30. The light emitting device according to any one of configurations 1 to 29. [Configuration 31] A display device comprising the light-emitting device according to any one of configurations 1 to 30. [Configuration 32] The imaging device includes 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, 31. An imaging device, wherein the display unit includes the light-emitting device according to any one of configurations 1 to 30. [Configuration 33] A display unit is provided in a housing, and a communication unit is provided in the housing and communicates with an external device. 31. An electronic device, wherein the display unit includes the light-emitting device according to any one of configurations 1 to 30.

[0081] The invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention. [Explanation of symbols]

[0082] 11: Reflective film, 12: Organic film, 13: Second electrode, 14: Sealing film, 15: Pixel, 16: Bank, 19: Optical member, 20: Color filter layer, 22: Transparent insulating film, 23: First electrode, 24: Planarizing film, B: Light-emitting region

Claims

1. A light-emitting device comprising: a reflective film, a first electrode, an organic film including a light-emitting layer, a second electrode, and an optical member disposed in this order on a main surface of a substrate; and a bank covering a periphery of the first electrode so as to define a light-emitting region, the light emitting region has a first region and a second region disposed between the bank and the first region, the reflective film, the first electrode, the organic film, and the second electrode form a resonator structure in which light generated in the organic film resonates between the reflective film and the second electrode; In the light emitting region, an upper surface of the reflective film is flatter than the first electrode, an optical path length in the first region is different from an optical path length in the second region; The optical member includes a lens, and light from the resonator structure is extracted through the lens. A light emitting device characterized by:

2. The optical path length in the second region is longer than the optical path length in the first region.

2. The light emitting device according to claim 1 .

3. The light-emitting device according to claim 1, characterized in that the second region includes a first portion and a second portion arranged to sandwich the first region.

4. a difference between a physical film thickness determining the optical path length in the second region and a physical film thickness determining the optical path length in the first region is 4 nm or more and 53 nm or less; 3. The light emitting device according to claim 2.

5. The area of ​​the first region is in the range of 10% to 90% of the sum of the area of ​​the first region and the area of ​​the second region.

3. The light emitting device according to claim 2.

6. The area of ​​the first region is smaller than the area of ​​the second region.

3. The light emitting device according to claim 2.

7. The area of ​​the first region is within a range of 10% or more and less than 50% of the sum of the area of ​​the first region and the area of ​​the second region.

3. The light emitting device according to claim 2.

8. The optical path length in the second region is shorter than the optical path length in the first region.

2. The light emitting device according to claim 1 .

9. a difference between a physical film thickness determining the optical path length in the first region and a physical film thickness determining the optical path length in the second region is 78 nm or more and 118 nm or less; 9. The light emitting device according to claim 8.

10. the reflective film, the first electrode, the organic film, and the second electrode are arranged so as to define an optical path length in the first region and an optical path length in the second region.

2. The light emitting device according to claim 1 .

11. The lens includes a collimator that collimates the light emitted from the first region and the second region, 2. The light emitting device according to claim 1 .

12. the second electrode has a plurality of regions, and a distance between a lower surface of each of the plurality of regions and an upper surface of the reflective film is different from one another; 2. The light emitting device according to claim 1 .

13. The second electrode has at least one step.

13. The light emitting device according to claim 12.

14. the organic film has at least one step, and the at least one step of the second electrode follows the at least one step of the organic film; 14. The light emitting device according to claim 13.

15. the first electrode has at least one step, and the at least one step of the organic film follows the at least one step of the first electrode; 15. The light emitting device according to claim 14.

16. a transparent insulating film is provided between the reflective film and the first electrode, the transparent insulating film has at least one step, and the at least one step of the first electrode is aligned with the at least one step of the transparent insulating film; 16. The light emitting device according to claim 15.

17. The first region has a circular shape and the second region has a ring shape.

2. The light emitting device according to claim 1 .

18. The light emitting region has a polygonal shape.

18. The light emitting device according to claim 17.

19. The first region has a rectangular shape, and the second region has a frame shape surrounding the first region.

2. The light emitting device according to claim 1 .

20. The second electrode has a curved or inclined surface.

2. The light emitting device according to claim 1 .

21. the organic film has a curved surface or an inclined surface, and the inclined surface of the second electrode follows the curved surface or the inclined surface of the organic film.

21. The light emitting device according to claim 20.

22. the first electrode has a curved or inclined surface, and the curved or inclined surface of the organic film follows the curved or inclined surface of the first electrode; 22. The light emitting device according to claim 21 .

23. the transparent insulating film has a curved surface or an inclined surface, and the curved surface or the inclined surface of the first electrode follows the curved surface or the inclined surface of the transparent insulating film; 17. The light emitting device according to claim 16.

24. a first sub-pixel including the reflective film, the transparent insulating film, the first electrode, the organic film, and the second electrode, and a second sub-pixel including the reflective film, the transparent insulating film, the first electrode, the organic film, and the second electrode, a thickness of the transparent insulating film of the first subpixel is different from a thickness of the transparent insulating film of the second subpixel; 17. The light emitting device according to claim 16.

25. an upper surface of the reflective film is parallel to a main surface of the substrate in the light emitting region; 2. The light emitting device according to claim 1 .

26. The organic film generates white light.

2. The light emitting device according to claim 1 .

27. A display device comprising a light emitting device according to any one of claims 1 to 26.

28. The imaging device includes 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, 27. An imaging device, wherein the display section includes the light emitting device according to claim 1.

29. A display device having a housing and a communication unit provided in the housing for communicating with an external device, 27. An electronic device, comprising: a display unit including the light-emitting device according to claim 1.

Images