CN114447247A

CN114447247A - Light emitting device, display device, photoelectric conversion device, illumination device, electronic apparatus, and moving object

Info

Publication number: CN114447247A
Application number: CN202011216098.6A
Authority: CN
Inventors: 佐野博晃; 石津谷幸司
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2022-05-06
Anticipated expiration: 2040-11-04
Also published as: CN114447247B

Abstract

The present invention relates to a device for light emission, display, photoelectric conversion, and illumination, an electronic apparatus, and a moving object. A light emitting device including first and second light emitting elements in a display region and first and second dummy elements in a dummy region is provided. The light emitting element and the dummy element each include a reflector disposed, a first electrode disposed over the reflector, a light emitting layer disposed over the first electrode, and a second electrode disposed over the light emitting layer. The difference between the distance from the reflector to the light-emitting layer in the first light-emitting element and the distance from the reflector to the light-emitting layer in the second light-emitting element is larger than the difference between the distance from the reflector to the light-emitting layer in the first dummy element and the distance from the reflector to the light-emitting layer in the second dummy element.

Description

Light emitting device, display device, photoelectric conversion device, illumination device, electronic apparatus, and moving object

Technical Field

The invention relates to a light-emitting device, a display device, a photoelectric conversion device, an electronic apparatus, an illumination device, and a moving object.

Background

Light-emitting devices including organic EL light-emitting elements have been attracting attention. A method of improving the resolution of a light-emitting device using a light-emitting element that emits white light and a color filter (hereinafter referred to as a white + CF method) is known. In the white + CF method, an organic layer is formed over the entire surface of a substrate. Therefore, the white + CF method relatively easily achieves high resolution for a pixel size, a pitch between pixels, or the like, as compared with a method of forming an organic layer for each color using a metal mask. Japanese patent laid-open No. 2017-146374 describes an electron optical device of a white + CF type in which a pixel electrode provided for each pixel is formed of a transparent conductive film, and a power supply line serving as a reflective layer is arranged between the pixel electrode and a substrate. By constructing an optical resonance structure between the reflective layer and the counter electrode, light extraction efficiency and color reproducibility are improved. Further, japanese patent laid-open No. 2017-146374 describes that an electro-optical device includes a display region that displays an image by driving pixels and a peripheral region adjacent to the display region in which virtual pixels each having a structure similar to that of the pixels but not contributing to image display are arranged.

In the structure described in japanese patent laid-open No. 2017-146374, since the film thickness of the optical path adjusting layer between the reflective layer and the counter electrode which realizes optical resonance differs for each color to be displayed, the counter electrode is formed on the concave-convex shape corresponding to the film thickness of the optical path adjusting layer. The irregularities corresponding to the film thickness of the optical path adjustment layer are formed not only in the display region but also in the peripheral region. If the concave-convex shape becomes large, a thin film portion may be generated in the counter electrode when the counter electrode is formed. If a thin film portion is generated in the counter electrode, the resistance of the counter electrode increases, and the resistance in the supply path of the power source for driving the pixels in the display area increases, which may cause the driving voltage to rise.

Disclosure of Invention

Each of some embodiments of the present invention provides a technique advantageous in suppressing a rise in driving voltage of a light-emitting device.

According to some embodiments, there is provided a light emitting device including a display region for displaying an image in which a first light emitting element and a second light emitting element are arranged, and a dummy region in which a first dummy element and a second dummy element are arranged and no image is displayed, wherein the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element each include a reflective layer arranged on a substrate, a first electrode arranged on the reflective layer, a light emitting layer arranged on the first electrode, and a second electrode arranged on the light emitting layer, a distance from the reflective layer to the light emitting layer in the first light emitting element is different from a distance from the reflective layer to the light emitting layer in the second light emitting element, and a distance from the reflective layer to the light emitting layer in the first light emitting element is different from a distance from the reflective layer to the light emitting layer in the second light emitting element The difference between the first and second dummy elements is set to a first difference, and the difference between the distance from the reflective layer to the light-emitting layer in the first dummy element and the distance from the reflective layer to the light-emitting layer in the second dummy element is set to a second difference smaller than the first difference.

According to still further embodiments, there is provided a light emitting device including a display region in which a first light emitting element and a second light emitting element are arranged for displaying an image, and a dummy region in which a first dummy element and a second dummy element are arranged and no image is displayed, wherein the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element each include a reflective layer arranged on a substrate, a first electrode arranged on the reflective layer, a light emitting layer arranged on the first electrode, a second electrode arranged on the light emitting layer, and an insulating layer arranged between the reflective layer and the first electrode, a film thickness of the insulating layer of the first light emitting element is different from a film thickness of the insulating layer of the second light emitting element, and a difference between the film thickness of the insulating layer of the first light emitting element and the film thickness of the insulating layer of the second light emitting element When a first difference is set and a difference between the film thickness of the insulating layer of the first dummy element and the film thickness of the insulating layer of the second dummy element is set as a second difference, the second difference is smaller than the first difference.

A display device includes the above light-emitting device and an active element connected to the light-emitting device.

A photoelectric conversion apparatus comprising an optical unit including a plurality of lenses, an image sensor configured to receive light passing through the optical unit, and a display unit configured to display an image, wherein the display unit is configured to display an image captured by the image sensor and includes the above-described light-emitting device.

An electronic apparatus includes a housing for equipping with a display unit, and a communication unit provided in the housing and configured to communicate with the outside, wherein the display unit includes the above-described light-emitting device.

A lighting device comprises at least one of a light diffusion unit and an optical film, and a light source, wherein the light source comprises the light-emitting device.

A movable body comprises a body and an illumination unit arranged in the body, wherein the illumination unit comprises the light-emitting device.

Further features of the invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.

Drawings

Fig. 1 is a plan view showing a configuration example of a light emitting device according to an embodiment;

FIG. 2 is a cross-sectional view of the light emitting device shown in FIG. 1;

fig. 3 is a plan view showing a modification of the light-emitting device shown in fig. 1;

FIG. 4 is a cross-sectional view of the light emitting device shown in FIG. 3;

fig. 5 is a sectional view of another modification of the light-emitting device shown in fig. 2;

fig. 6 is a plan view showing still another modification of the light-emitting device shown in fig. 1;

fig. 7 is a plan view showing still another modification of the light-emitting device shown in fig. 1;

fig. 8 is a plan view showing still another modification of the light-emitting device shown in fig. 1;

fig. 9 is a sectional view showing still another modification of the light-emitting device shown in fig. 2;

fig. 10 is a sectional view of a light-emitting device of a comparative example;

fig. 11 is a diagram showing an example of a display device using the light-emitting device shown in fig. 1;

fig. 12 is a diagram showing an example of a photoelectric conversion apparatus using the light-emitting apparatus shown in fig. 1;

fig. 13 is a diagram showing an example of an electronic apparatus using the light-emitting device shown in fig. 1;

fig. 14A and 14B are diagrams each showing an example of a display device using the light-emitting device shown in fig. 1;

fig. 15 is a view showing an example of a lighting device using the light emitting device shown in fig. 1; and

fig. 16 is a diagram showing an example of a moving body using the light-emitting device shown in fig. 1.

Detailed Description

The embodiments will be described in detail below with reference to the accompanying drawings. Note that the following examples are not intended to limit the scope of the claimed invention. A plurality of features are described in the embodiments, but not limited to the invention requiring all of these features, and a plurality of such features may be appropriately combined. Further, in the drawings, the same reference numerals are given to the same or similar structures, and the repetitive description of these structures is omitted.

Referring to fig. 1 to 10, the structure of a light emitting device according to an embodiment of the present invention will be explained. Fig. 1 is a plan view showing a configuration example of a light emitting device 100 in the present embodiment. The light-emitting device 100 includes a display region 120 in which a plurality of light-emitting elements 201 are arranged for displaying an image, and a dummy region 121 in which a plurality of dummy elements 202 are arranged and an image is not displayed. As shown in fig. 1, the virtual area 121 may be arranged to surround the display area 120. The light emitting elements 201 and the dummy elements 202 are arranged in a two-dimensional array. In the display region 120, an image is actually displayed by driving each light emitting element 201. The dummy elements 202 arranged in the dummy area 121 have a structure similar to that of the light emitting elements 201 arranged in the display area 120, but do not actually contribute to the display of an image. The dummy elements 202 may not emit light. The dummy elements 202 are arranged, for example, for suppressing light reflection outside the display area 120, and are provided with a reflective electrode structure similar to that of the display area 120. The outer edge of the display region 120 may be defined by the outer edge of the outermost light emitting element 201 among the plurality of light emitting elements 201 that actually emit light. Alternatively, as shown in fig. 1, the outer edge of the display region 120 may be a substantially rectangular shape obtained by connecting the outer edges of the outermost light-emitting elements 201 of the plurality of light-emitting elements 201 that actually emit light.

Fig. 2 is a schematic cross-sectional view of a boundary portion a between the display area 120 and the dummy area 121 shown in fig. 1. Light emitting elements 201 are arranged on a substrate 301 in the display area 120, and dummy elements 202 are arranged on the substrate 301 in the dummy area 121. The light-emitting element 201 and the dummy element 202 each include a reflective layer 302 disposed on a substrate 301, an electrode 304 disposed over the reflective layer 302, an organic layer 305 including a light-emitting layer disposed on the electrode 304, and an electrode 306 disposed on the organic layer 305. In addition, an insulating layer 303 is disposed between the reflective layer 302 and an electrode 304 (also referred to as a lower electrode or an individual electrode) disposed for each of the light-emitting element 201 and the dummy element 202. Further, a sealing layer 307 and a planarizing layer 308 are arranged on an electrode 306 (also referred to as an upper electrode or a common electrode) shared by the light-emitting element 201 and the dummy element 202. In the configuration shown in fig. 2, the sealing layer 307 and the planarizing layer 308 are shown as different layers, but both may be formed as one layer. Further, in the configuration shown in fig. 2, each light emitting element 201 includes one of color filters 310(310a, 310b, and 310c) that transmit different colors. This enables the light-emitting device 100 to perform, for example, full-color display. The color filter 310 may be disposed in the dummy area 121.

The insulating layers 303a to 303c arranged in the light emitting elements 201a to 201c respectively have different thicknesses to optimize an optical distance from the upper surface of the reflective layer 302 to a light emitting position of the light emitting layer of the organic layer 305 according to colors transmitted by the color filters 310a to 310 c. It can be said that the plurality of light emitting elements 201a to 201c include light emitting elements in which the insulating layer 303 has different film thicknesses. The insulating layer 303 optimizes an optical distance from the reflective layer 302 to the light emitting layer of the organic layer 305, so that the insulating layer 303 can also be referred to as an optical path adjusting layer. On the other hand, the insulating layer 303 arranged in the dummy element 202 does not change according to the color filters 310a to 310c arranged in the dummy element 202, and the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 is constant. In other words, the distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 in the dummy element 202a is equal to the distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 in the dummy element 202 b. Similarly, the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the dummy element 202a is equal to the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the dummy element 202 c. In the configuration shown in fig. 2, the insulating layer 303 disposed in the dummy element 202 has a film thickness similar to that of the insulating layer 303c disposed in the light emitting element 201 c.

In the present embodiment, the difference between the distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 in the light-emitting element 201a and the distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 in the light-emitting element 201b is set as the first difference. Further, the difference between the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the dummy element 202a and the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the

dummy element

202b or 202c is set as the second difference. In this case, the second difference is smaller than the first difference. Similarly, even if the difference between the distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 in the light-emitting element 201b and the distance in the light-emitting element 201c is set to be the first difference, the second difference is smaller than the first difference. Further, even if the difference between the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the light emitting element 201a and the distance of the light emitting element 201c is set to be the first difference, the second difference is smaller than the first difference. In the configuration shown in fig. 2, the difference in distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 between any two of the plurality of dummy elements 202a to 202c is smaller than the difference between: the distance in the light emitting element 201b in which the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 is the largest among the plurality of light emitting elements 201a to 201c, and the distance in the light emitting element 201c in which the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 is the smallest among the plurality of light emitting elements 201a to 201 c. Here, the difference in distance from the reflective layer 302 to the light emitting layer of the organic layer 305 may be a difference in film thickness of the insulating layer 303 disposed in each of the light emitting elements 201a to 201c and the dummy elements 202a to 202 c. These details will be described later.

For the substrate 301, a material which can support the light-emitting element 201 and the dummy element 202 is used, and the light-emitting element 201 and the dummy element 202 each include a reflective layer 302, an insulating layer 303, an electrode 304, an organic layer 305, an electrode 306, and the like. As a material of the substrate 301, glass, plastic, silicon, or the like can be used. In addition, in the substrate 301, a switching element such as a transistor or the like, a wiring, or the like may be formed below the reflective layer 302 (on the side opposite to the organic layer 305) via an interlayer insulating film or the like.

A metal material having a visible light reflectance of 50% or more may be used for the reflective layer 302 from the viewpoint of light emission efficiency. More specifically, a metal such as Aluminum (AI) or silver (Ag), an alloy obtained by adding silicon (Si), copper (Cu), nickel (Ni), neodymium (Nd), titanium (Ti), or the like to the metal, or the like may be used for the reflective layer 302. The reflective layer 302 may have a stacked structure including a barrier layer on the light reflecting surface in addition to the layers formed of the above-described materials. As a material of the barrier layer, a metal such as Ti, tungsten (W), molybdenum (Mo), gold (Au), or an alloy thereof, or a transparent conductive oxide such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO) can be used.

An inorganic material such as silicon nitride (SiN), silicon oxynitride (SiON), or silicon oxide (SiO) may be used for the insulating layer 303. The insulating layer 303 can be formed using a known technique such as a sputtering method or a chemical vapor deposition method (CVD method). The insulating layer 303 may also be formed using an organic material such as an acrylic resin or a polyimide resin. In addition, the insulating layer 303 may have a stacked structure formed of a plurality of layers. In the present embodiment, an example in which the insulating layer 303 has three types of film thicknesses is shown, but the present invention is not limited thereto.

The film thicknesses of the insulating layers 303a to 303c for optimizing the distances (optical distances) between the reflective layer 302 and the light emitting layer of the organic layer 305 in each of the light emitting elements 201a to 201c for the respective colors transmitted by the color filters 310a to 310c will be described. Lr represents an optical path length from the upper surface of the reflective layer 302 to the light-emitting layer of the organic layer 305, and Φ r represents a phase shift in the reflective layer 302:

Lr＝{2m-(Φr/π)}×(λ/4) ...(1)

wherein: m is an integer (non-negative integer) equal to or greater than 0. The optical distances of the insulating layers 303a to 303c are optimized for the respective colors to approximately satisfy equation (1).

Further, in the case where Φ s denotes a phase shift on the reflective surface of the electrode 306 when light having the wavelength λ is reflected, the optical distance Ls from the light-emitting layer of the organic layer 305 to the reflective surface of the electrode 306 approximately satisfies the following equation (2). In this configuration, m' is 0.

Ls＝{2m'-(Φs/π)}×(λ/4)＝-(Φs/π)×(λ/4) ...(2)

Therefore, the total layer interference L approximately satisfies the following equation (3):

L＝Lr+Ls＝(2m-Φ/π)×(λ/4) ...(3)

wherein: Φ is the sum Φ r + Φ s of the phase shifts when light having the wavelength λ is reflected by the reflective layer 302 and the electrode 306.

The electrode 304 may be a transparent conductive film that transmits visible light, and ITO, IZO, Aluminum Zinc Oxide (AZO), Indium Gallium Zinc Oxide (IGZO), or the like is used. As shown in fig. 2, a partition wall 309 may be provided in the outer peripheral portion of the electrode 304 in each of the light-emitting element 201 and the dummy element 202. The partition wall 309 is provided so as to cover an end portion of the outer edge of the electrode 304, and an opening is provided so that a part of the center of the electrode 304 is exposed. An inorganic material such as SiN, SiON, or SiO may be used for the partition wall 309. The partition wall 309 can be formed using a known technique such as a sputtering method or a CVD method. In addition, an organic material such as an acrylic resin or a polyimide resin may be used for the partition wall 309.

The organic layer 305 is disposed on the electrode 304, and may be formed using a known technique such as a vapor deposition method or a spin coating method. The organic layer 305 may be formed of a plurality of layers including a light emitting layer. Examples of the plurality of layers include a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer. The organic layer 305 emits light when holes injected from the anode and electrons injected from the cathode are recombined in the light emitting layer. The light emitting layer may be formed of a single layer or a plurality of layers. Each of the light emitting layers may include a red light emitting material, a green light emitting material, or a blue light emitting material, and white light may also be obtained by mixing the respective emission colors. In addition, each light emitting layer may include light emitting materials having a complementary color relationship such as a blue light emitting material and a yellow light emitting material. In addition, as shown in fig. 2, the organic layer 305 may be shared by a plurality of light emitting elements 201 and a plurality of dummy elements 202. However, the present invention is not limited thereto, and all or a part of the organic layer 305 may be patterned for each light emitting element 201 or some light emitting elements 201 or for each dummy element 202 or some dummy elements 202.

The electrode 306 is disposed on the organic layer 305, and has light transmittance. The electrode 306 may be a semi-transmissive material having properties of transmitting a part of light reaching its surface and reflecting other parts of the light (i.e., semi-transmissive reflectivity). For the electrode 306, for example, a transparent material such as a transparent conductive oxide or the like, or a semi-transmissive material such as: metals such as Al, Ag, or Au; alkali metals such as lithium (Li) or cesium (Cs); alkaline earth metals such as magnesium (Mg), calcium (Ca), or barium (Ba); or an alloy material containing these metal materials. For example, the semi-permeable material for the electrode 306 may be an alloy containing Mg or Ag as a main component. The electrode 306 may have a stacked structure of the above materials. The electrode 306 may have any structure as long as the electrode 306 has suitable transmittance and conductivity. As shown in fig. 2, the electrode 306 is shared by the light-emitting element 201 and the dummy element 202. In the present embodiment, the electrode 304 is an anode and the electrode 306 is a cathode, but the electrode 304 may be a cathode and the electrode 306 may be an anode.

The sealing layer 307 is formed to cover the organic layer 305 including the light emitting layer. The sealing layer 307 may include an inorganic material having light transmittance and low permeability to oxygen and moisture from the outside. For the sealing layer 307, for example, a material such as SiN, SiON, SiO, alumina (Al) may be used₂O₃) Or titanium oxide (TiO)₂) And the like. From the viewpoint of sealing property, SiN, SiON, or Al may be used₂O₃. Can be formed by CVD method, atomic layer deposition method (ALD method), sputtering method or the likeA sealing layer 307 is formed. The sealing layer 307 may have a single-layer structure or a stacked structure obtained by combining the above materials or forming methods as long as sufficient moisture barrier properties are provided. In the present embodiment, the sealing layer 307 is disposed on the plurality of light emitting elements 201 and the plurality of dummy elements 202.

A planarization layer 308 is formed on the sealing layer 307. The planarization layer 308 may be formed of an inorganic material or an organic material as long as the material has light transmittance. For example, the sealing layer 307 may be formed by applying an organic material.

A color filter 310 is disposed on the planarization layer 308. In the present embodiment, the

color filters

310a, 310b, and 310c are color filters that transmit different colors. Thus, in the light-emitting device 100, the light-emitting

elements

201a, 201b, and 201c can be each regarded as a sub-pixel, and the three sub-pixels can be regarded as one main pixel. The

color filters

310a, 310b, and 310c may be color filters that transmit red, green, and blue light, respectively. Additive color mixing (additive color mixing) of these sub-pixels enables the light-emitting device 100 to perform full-color display. In the present embodiment, an example of a color filter that transmits light components of three colors is shown, but the present invention is not limited thereto. The planar array of the

light emitting elements

201a, 201b, and 201c may be any of a stripe array, a square array, a delta array, a pentile array, and a bayer array. By arranging the main pixels in a matrix, an organic EL display device having a large number of pixels can be realized.

Next, effects obtained by the configuration of the light emitting device 100 of the present embodiment as described above will be described. Fig. 10 shows a cross-sectional view of a light-emitting device 110 in a comparative example. In the light-emitting device 110, the dummy elements 202a to 202c include insulating layers 303a to 303c having different film thicknesses, respectively, as with the light-emitting elements 201a to 201c in the display region 120. That is, the film thickness of the insulating layer 303 is different between the dummy elements 202a to 202c (sub-pixels), so that a step is formed on the upper surface of the organic layer 305. Further, an electrode 306 is formed on the upper surface of the organic layer 305 over the entire area of the display area 120 and the dummy area 121. Therefore, the unevenness of the electrode 306 becomes large for each sub-pixel according to the difference in film thickness between the insulating layers 303a to 303 c.

Here, as shown in fig. 1, the light emitting device 100 includes a contact region 122 for supplying a potential to the electrode 306 such that the dummy region 121 is disposed between the contact region 122 and the display region 120. The contact region 122 connects the electrode 306 to a cathode potential from the outside of the dummy region 121. As shown in fig. 1, the contact area 122 may be arranged to surround the display area 120 and the virtual area 121. A current for flowing between the electrode 304 and the electrode 306 to cause the light emitting layer of the organic layer 305 to emit light passes through the light emitting element 201 and the electrode 306 arranged on the dummy element 202 and flows into the contact region 122. At this time, as shown in fig. 10, if the height difference of the electrode 306 in the dummy area 121 becomes large, a thin film portion may be generated in the electrode 306 when the electrode 306 is formed. If a thin film portion is generated in the electrode 306, the resistance of the electrode 306 increases, and the resistance in a supply path of a power source for driving the light emitting element 201 in the display region 120 increases, which may cause a rise in driving voltage.

On the other hand, in the present embodiment, the insulating layer 303(303c) disposed on the reflective layer 302 in the dummy elements 202a to 202c has a constant film thickness regardless of the dummy elements 202a to 202 c. Therefore, there is no difference in film thickness of the insulating layer 303 between the dummy elements 202a to 202c (sub-pixels). This can reduce the unevenness of the electrodes 306 arranged on the dummy area 121. Therefore, when the electrode 306 is formed, generation of a thin film portion in the electrode 306 formed in the dummy region 121 can be suppressed. As a result, an increase in the resistance of the electrode 306 in the dummy region 121 is suppressed, and an increase in the driving voltage of the light-emitting device 100 is suppressed.

In the configuration shown in fig. 2, the thickness of the insulating layer 303 disposed in the dummy region 121 is set to be equal to the thickness of the insulating layer 303c disposed in the light emitting element 201c, but the present invention is not limited thereto. For example, the thickness of the insulating layer 303 disposed in the dummy region 121 may be equal to the film thickness of the insulating layer 303a or the insulating layer 303 b. As long as the film thickness of the insulating layer 303 disposed in the dummy element 202 is equal to the film thickness of any of the insulating layers 303a to 303c disposed in the light emitting element 201, the height difference of the electrode 306 in the dummy region 121 can be reduced without increasing the number of processing steps. Alternatively, the thickness of the insulating layer 303 disposed in the dummy region 121 may be different from the film thickness of the insulating layers 303a to 303 c.

Next, a modification of the light-emitting device 100 described above will be described with reference to fig. 3 and 4. Fig. 3 is a plan view showing a configuration example of the light emitting device 400 of the present embodiment. Fig. 4 is a schematic cross-sectional view of a boundary portion B between the display area 120 and the dummy area 121 shown in fig. 3. In contrast to the above-described light-emitting device 100, the light-emitting device 400 further includes an intermediate region 123 between the display region 120 and the dummy region 121, in which intermediate region 123 a plurality of intermediate dummy elements 401 are arranged and the intermediate region 123 does not display an image. The intermediate dummy elements 401 arranged in the intermediate area 123 may not emit light.

As with the light-emitting device 100 described above, the dummy area 121 is an area that: the film thickness of the insulating layer 303 is the same between the dummy elements 202a to 202c, and therefore there is no difference in the film thickness between the reflective layer 302 and the electrode 304 between these dummy elements 202. On the other hand, the plurality of intermediate dummy elements 401 includes intermediate dummy elements 401a to 401c different in distance between the reflective layer 302 and the light emitting layer of the organic layer 305. Further, a difference between the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the light emitting element 201a and the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the light emitting element 201b is set as a first difference. In addition, the difference between the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the intermediate dummy element 401a and the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 in the intermediate dummy element 401b is set as a third difference. In this case, the first difference is equal to the third difference. Similarly, even when the difference in distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 between the light-emitting

elements

201b and 201c is set to a first difference and the difference in distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 between the

intermediate dummy elements

401b and 401c is set to a third difference, the first difference is equal to the third difference. Further, even when the difference in distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 between the light-emitting

elements

201a and 201c is set to a first difference, and the difference in distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 between the

intermediate dummy elements

401a and 401c is set to a third difference, the first difference is similarly equal to the third difference. For example, the following two differences may be equal: a difference in the distance between a light emitting element of the plurality of light emitting elements 201a to 201c in which the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 is the largest and a light emitting element of the plurality of light emitting elements in which the distance is the smallest, and a difference in the distance between an intermediate dummy element of the plurality of intermediate dummy elements 401a to 401c in which the distance from the reflective layer 302 to the light emitting layer of the organic layer 305 is the largest and an intermediate dummy element of the plurality of intermediate dummy elements in which the distance is the shortest.

In this case, the relationship regarding the arrangement order of the light emitting elements 201a to 201c in the display region 120 and the distances of the light emitting elements 201a to 201c from the reflective layer 302 to the light emitting layer of the organic layer 305 is similar to the relationship regarding the arrangement order of the intermediate dummy elements 401a to 401c in the intermediate region 123 and the distances of the intermediate dummy elements 401a to 401c from the reflective layer 302 to the light emitting layer of the organic layer 305. That is, the intermediate dummy elements 401a to 401c in the intermediate area 123 have a configuration similar to that of the light emitting elements 201a to 201c in the display area 120, and are arranged in a predetermined similar order. This makes it possible to stabilize the shape of the outermost periphery of the display region 120 at the time of manufacturing the light emitting device 400, and suppress an increase in driving voltage while maintaining the quality of a displayed image. The number of intermediate dummy elements 401 arranged in the intermediate area 123 may be about two, but may be greater than two. However, if a large number of intermediate dummy elements 401 are arranged, the unevenness of the electrode 306 becomes large, and this may cause the resistance of the intermediate region 123 to increase. Therefore, the number of intermediate dummy elements 401 arranged between the light emitting element arranged at the outer edge of the display region 120 among the plurality of light emitting elements 201 and the dummy element closest to the light emitting element among the plurality of dummy elements 202 may be, for example, 2 or more and 10 or less.

Fig. 5 is a sectional view showing a configuration example of a light emitting device 500 of the present embodiment, which shows another modification of the light emitting device 100 described above. In the light emitting device 100, color filters 310a to 310c that transmit different colors according to each dummy element 202 are arranged. On the other hand, in the light-emitting device 500 shown in fig. 5, the same color filter (color filter 310b) in common is arranged as the color filter 310 arranged in the dummy element 202. In this case, a color filter 310 that transmits light having a wavelength different from that of light resonating between the reflective layer 302 and the electrode 306 may be arranged in the plurality of dummy elements 202.

For example, it is assumed that the insulating layer 303c is formed at a film thickness such that the optical distance from the reflective layer 302 to the light-emitting layer of the organic layer 305 is optimal for blue. In this case, the color filter 310b may be a color filter that transmits red. In this way, light resonating between the reflective layer 302 and the light-emitting layer of the organic layer 305 and light transmitted by the color filter arranged in the dummy element may have a complementary color relationship. With this configuration, even when the electrode 304 of the dummy element 202 and the electrode 304 of the light emitting element 201 adjacent to the dummy element 202 are short-circuited and the dummy element 202 emits light, light suitable for a blue color filter is emitted from the organic layer 305. However, since the red color filter 310b is disposed on the dummy elements 202, unnecessary light emitted from the dummy elements 202 is suppressed and further blocked. In addition, for example, the peak wavelength of light resonating between the reflective layer 302 and the light emitting layer of the organic layer 305 may be different from the peak wavelength of light transmitted by the color filter 310 disposed on the dummy element 202 by 100nm or more. Also in this case, the influence of light emission using the dummy elements 202 can be suppressed.

Further modifications of the above-described light-emitting device 100 will be described with reference to fig. 6 to 8. Fig. 6 is a plan view showing a configuration example of a light emitting device 600 of the present embodiment. In the light-emitting device 600, the contact regions 122 each for supplying an electric potential to the electrode 306 do not surround the display region 120 and the dummy region 121, but are arranged at both ends in the X direction in the configuration shown in fig. 6.

Fig. 6 shows a light emitting device 600 comprising a display area 120 with light emitting elements 201 arranged in a striped array. As described above, the plurality of light emitting elements 201 include the plurality of light emitting elements 201a (denoted by "G" in fig. 6) and the plurality of light emitting elements 201b (denoted by "R" in fig. 6), each of the plurality of light emitting elements 201a is provided with, for example, the insulating layer 303a having a first distance from the reflective layer 302 to the light emitting layer of the organic layer 305, and each of the plurality of light emitting elements 201b is provided with, for example, the insulating layer 303b having a second distance different from the first distance. In the X direction, any one of the plurality of light emitting elements 201b (r) is arranged between the light emitting elements 201a (g) adjacent to each other among the plurality of light emitting elements 201a (g). In addition, in the Y direction intersecting the X direction, at least any one of the plurality of light emitting elements 201a (g) and the plurality of light emitting elements 201b (r) is continuously arranged. In the stripe array shown in fig. 6, both of the plurality of light emitting elements 201a (g) and the plurality of light emitting elements 201b (r) are continuously arranged. In this case, the contact regions 122 are arranged along the Y direction outside the outer edge of the dummy region 121 intersecting the X direction.

In the configuration shown in fig. 6, a current flowing from the electrode 304 to the electrode 306 to cause the light emitting element 201 to emit light flows into the contact region 122 mainly in the X direction. At this time, in the light-emitting device 110 of the comparative example shown in fig. 10, irregularities are generated in the X direction due to a change in the film thickness of the insulating layer 303, and the irregularities of the shape of the electrode 306 are larger in the X direction than in the Y direction. Therefore, in the dummy area 121, the resistance of the electrode 306 may be larger in the X direction than in the Y direction. On the other hand, in the light-emitting device 600, the film thickness of the insulating layer 303 is constant over the dummy elements 202 arranged in the dummy region 121. Therefore, in the dummy region 121, the difference in resistance between the X direction and the Y direction is suppressed more than in the light emitting device 110 of the comparative example. Thus, a rise in voltage for driving the light emitting element 201 can be suppressed. In this way, in the case where the light emitting element 201 and the dummy element 202 provided with the color filters 310 for different colors are arranged in the direction in which the current flows, the effect of the structure of the dummy region 121 of the present embodiment can be large. Fig. 7 is a plan view in the case of a pentile array, and fig. 8 is a plan view in the case of a square array. As with the stripe array shown in fig. 6, a rise in the drive voltage can be suppressed.

Referring to fig. 9, still another modification of the above-described light-emitting device 100 will be explained. Fig. 9 is a plan view showing a configuration example of the light emitting device 900 of the present embodiment. In the light-emitting device 900, the film thickness of the insulating layer 303 disposed in the dummy elements 202 in the dummy region 121 differs among the dummy elements 202a to 202 c. An insulating layer 303d is arranged in the dummy element 202a, an insulating layer 303e is arranged in the dummy element 202b, and an insulating layer 303c is arranged in the dummy element 202 c. Here, for example, a difference in distance from the reflective layer 302 to the light emitting layer of the organic layer 305 between any two of the plurality of dummy elements 202a to 202c may be smaller than a difference in distance between a light emitting element of the plurality of light emitting elements 201a to 201c, of which distance from the reflective layer 302 to the light emitting layer of the organic layer 305 is largest, and a light emitting element of the plurality of light emitting elements, of which distance is smallest. In the configuration shown in fig. 9, the difference in distance from the reflective layer 302 to the light emitting layer of the organic layer 305 between the dummy element 202b and the light emitting element 201c may be smaller than the difference in distance from the reflective layer 302 to the light emitting layer of the organic layer 305 between the

light emitting elements

201b and 201 c. In other words, the difference between the film thickness of the insulating layer 303e of the dummy element 202b and the film thickness of the insulating layer 303c of the light emitting element 201c may be smaller than the difference between the film thickness of the insulating layer 303b of the light emitting element 201b and the film thickness of the insulating layer 303c of the light emitting element 201 c. Further, for example, a difference in distance from the reflective layer 302 to the light emitting layer of the organic element 305 between the mutually adjacent ones of the plurality of dummy elements 202a to 202c may be smaller than a difference in distance from the reflective layer 302 to the light emitting layer of the organic element 305 between the mutually adjacent ones of the plurality of light emitting elements 201a to 201 c. With this configuration, also in the light-emitting device 900, a height difference generated on the electrode 306 arranged in the dummy region 121 can be reduced, so that a resistance rise of the electrode 306 can be suppressed, and a drive voltage rise for driving the light-emitting element 201 can be suppressed. In addition, even in the case where a current flows in a direction in which there is a difference in film thickness between the insulating layers 303 as in the light-emitting device 600 described above, an increase in resistance of the electrode 306 in the dummy region 121 of the light-emitting device 900 can be more suppressed than in the light-emitting device 110. As a result, a rise in the driving voltage for driving the light emitting element 201 can be suppressed.

Here, application examples in which the light-emitting

device

100, 400, 500, 600, or 900 (the light-emitting

devices

100, 400, 500, 600, and 900 will be hereinafter representatively referred to as "the light-emitting device 100") of the present embodiment is applied to a display device, a photoelectric conversion device, an electronic apparatus, an illumination device, and a moving body will be described with reference to fig. 11 to 16. In addition, the light-emitting device 100 can be applied to an exposure light source of an electrophotographic image forming apparatus, a backlight of a liquid crystal display device, a light-emitting unit including a color filter in a white light source, and the like. The display device may be an image information processing device that includes an image input unit for inputting image information from an area CCD, a linear CCD, a memory card, or the like, and an information processing unit for processing the input information, and displays the input image on the display unit. In addition, a display unit included in a camera or an inkjet printer may have a touch panel function. The driving type of the touch panel function may be an infrared type, a capacitance type, a resistance film type, or an electromagnetic induction type, and is not particularly limited. The display device may be used for a display unit of a multifunction printer.

Fig. 11 is a diagram schematically showing an example of a display device using the light-emitting device 100 of the present embodiment. The display apparatus 1000 may include 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 touch panel 1003 and the display panel 1005 are connected to a flexible printed circuit FPC 1002 and an FPC 1004, respectively. Active elements such as transistors and the like are arranged on the circuit board 1007. The battery 1008 may not be provided if the display device 1000 is not a portable device, or the battery 1008 need not be provided at that location even if the display device is a portable device. The above-described light-emitting device 100 serving as a light-emitting unit (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material such as an organic EL material) can be applied to the display panel 1005. The light-emitting device 100 serving as the display panel 1005 is connected to active elements such as transistors and the like arranged on the circuit board 1007 to be operated.

The display device 1000 shown in fig. 11 can be used for a display unit of a photoelectric conversion device (image pickup device) including an optical unit including a plurality of lenses, and an image sensor for receiving light passing through the optical unit and photoelectrically converting the light into an electric signal. The photoelectric conversion apparatus may include a display unit for displaying information acquired by the image sensor. The display unit may be a display unit exposed to the outside of the photoelectric conversion apparatus, or a display unit arranged in a viewfinder. The photoelectric conversion apparatus may be a digital camera or a digital video camera.

Fig. 12 is a diagram schematically showing an example of a photoelectric conversion device using the light-emitting device 100 of the present embodiment. The photoelectric conversion apparatus 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The photoelectric conversion apparatus 1100 may be referred to as an image pickup apparatus. The light emitting device 100 in which the light emitting layer of the organic layer 305 includes an organic light emitting material and functions as a light emitting unit can be applied to the viewfinder 1101 functioning as a display unit. In this case, the light-emitting device 100 can display not only an image to be captured but also environmental information, an image capturing instruction, and the like. The environment information may include the intensity of the environment light, the direction of the environment light, the moving speed of the subject, or the possibility that the subject is blocked by a blocking object, or the like.

Since the timing suitable for taking an image is often a short time, it is preferable to display information as quickly as possible. Therefore, the above-described light-emitting device 100 (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) can be used in the viewfinder 1101 because the organic light-emitting material has a high response speed. The light emitting device 100 using an organic light emitting material is more suitable for use than a liquid crystal display device among devices requiring a high display speed.

The photoelectric conversion apparatus 1100 includes an optical unit (not shown). The optical unit includes a plurality of lenses, and an image is formed on a photoelectric conversion element (not shown) accommodated in the housing 1104 for receiving light that has passed through the optical unit. The focal point can be adjusted by adjusting the relative positions of the plurality of lenses. This operation may be automated.

The above-described light-emitting device 100 (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) serving as a light-emitting unit can be applied to a display unit of an electronic apparatus. In this case, the display unit may have both a display function and an operation function. Examples of mobile terminals include mobile phones such as smart phones, tablets, and head mounted displays.

Fig. 13 is a diagram schematically showing an example of an electronic apparatus using the light-emitting device 100 of the present embodiment. The electronic apparatus 1200 includes a display unit 1201, an operation unit 1202, and a housing 1203. The housing 1203 may include an electric circuit, a printed board including the electric circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type sensing unit. The operation unit 1202 may be a biometric unit that recognizes a fingerprint and unlocks, or the like. A mobile device comprising a communication unit may also be referred to as a communication device. The above-described light-emitting device 100 serving as a light-emitting unit (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) can be applied to the display unit 1201.

Fig. 14A and 14B are diagrams schematically illustrating an example of a display device using the light-emitting device 100 of the present embodiment. Fig. 14A illustrates a display device such as a television monitor or a PC monitor. The display apparatus 1300 includes a frame 1301 and a display unit 1302. The above-described light-emitting device 100 serving as a light-emitting unit (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) can be applied to the display unit 1302. The display apparatus 1300 may include a base 1303 supporting the frame 1301 and the display unit 1302. The base 1303 is not limited to the form shown in fig. 14A. The lower edge of the frame 1301 may serve as a base 1303. The frame 1301 and the display unit 1302 may be curved. The radius of curvature may be 5000mm or more and 6000mm or less.

Fig. 14B is a diagram schematically illustrating another example of a display device using the light-emitting device 100 of the present embodiment. The display device 1310 shown in fig. 14B is configured to be bendable, 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 above-described light-emitting device 100 serving as a light-emitting unit (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) may be applied to each of the first display unit 1311 and the second display unit 1312. The first display unit 1311 and the second display unit 1312 may be one seamless display device. The first display unit 1311 and the second display unit 1312 may be divided at a bending point. The first display unit 1311 and the second display unit 1312 may display different images, or one image may be displayed using the first display unit and the second display unit.

Fig. 15 is a diagram schematically showing an example of an illumination device using the light-emitting device 100 of 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 unit 1405. The above-described light-emitting device 100 (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) serving as a light-emitting unit may be applied to the light source 1402. The optical film 1404 may be a color filter that improves color rendering of the light source. The light diffusion unit 1405 can efficiently diffuse light from the light source to illuminate a wide range for illumination, or the like. A cap may be provided in the outermost portion as required. The illumination device 1400 may include both the optical film 1404 and the light diffusing unit 1405, or may include only one of the two.

The lighting device 1400 is, for example, a device for illuminating a room. The lighting device 1400 may emit light of white, daytime white, or any other color from blue to red. The lighting device 1400 may include a light control circuit for controlling the color of light. The lighting device 1400 may include a power circuit connected to the light-emitting device 100 serving as the light source 1402. The power supply circuit is a circuit that converts an AC voltage into a DC voltage. Note that the color temperature of white light is 4200K, and the color temperature of daytime white light is 5000K. The illumination device 1400 may further include a color filter. In addition, the lighting device 1400 may include a heat dissipation part. The heat dissipating portion releases heat in the device to the outside of the device, and examples thereof include metals having high specific heat, liquid silicon, and the like.

Fig. 16 is a diagram schematically illustrating an automobile including a tail lamp, which is an example of an illumination unit of the automobile using the light-emitting device 100 of the present embodiment. The automobile 1500 includes a tail lamp 1501, and the tail lamp 1501 may be lit when a braking operation or the like is performed. The light emitting device 100 of the present embodiment can be used in a headlamp as an illumination unit of an automobile. An automobile is an example of a mobile body, and the mobile body may be a ship, a drone, an airplane, a rail vehicle, or the like. The moving body may include a body and an illumination unit disposed in the body. The lighting unit may inform the current position of the body.

The above-described light-emitting device 100 (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) serving as the light-emitting unit may be applied to the tail light 1501. The tail light 1501 may include a protective member that protects the light emitting device 100 serving as the tail light 1501. The protective member has a certain degree of strength, and may be made of any material as long as the protective member is transparent. The protective member may be made of polycarbonate or the like. Further, the protective member may be made by mixing polycarbonate with a furandicarboxylic acid derivative or an acrylonitrile derivative, or the like.

The automobile 1500 may include a body 1503 and a window 1502 attached to the body. The window may be a window for confirming the front or rear of the automobile, or may be a transparent display. The above-described light-emitting device 100 (in the light-emitting device 100, the light-emitting layer of the organic layer 305 includes an organic light-emitting material) serving as a light-emitting unit may be used in a transparent display. In this case, components such as electrodes included in the light emitting device 100 are formed of a transparent member.

The present invention is not limited to the above-described embodiments, and various changes and modifications can be made within the spirit and scope of the present invention. Therefore, to apprise the public of the scope of the present invention, the appended claims are added.

According to some embodiments of the present invention, a technique advantageous in improving reliability of a light emitting device can be provided.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A light emitting device includes a display region in which a first light emitting element and a second light emitting element are arranged for displaying an image, and a dummy region in which a first dummy element and a second dummy element are arranged and in which an image is not displayed,

wherein the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element each include a reflective layer disposed on a substrate, a first electrode disposed over the reflective layer, a light emitting layer disposed over the first electrode, and a second electrode disposed over the light emitting layer,

a distance from the reflective layer to the light emitting layer in the first light emitting element is different from a distance from the reflective layer to the light emitting layer in the second light emitting element, an

In a case where a difference between a distance from the reflective layer to the light emitting layer in the first light emitting element and a distance from the reflective layer to the light emitting layer in the second light emitting element is set to a first difference, and a difference between a distance from the reflective layer to the light emitting layer in the first dummy element and a distance from the reflective layer to the light emitting layer in the second dummy element is set to a second difference, the second difference is smaller than the first difference.

2. The light-emitting device according to claim 1, wherein a distance from the reflective layer to the light-emitting layer in the first dummy element is equal to a distance from the reflective layer to the light-emitting layer in the second dummy element.

3. The light-emitting device according to claim 1, wherein a distance from the reflective layer to the light-emitting layer in the first dummy element is different from a distance from the reflective layer to the light-emitting layer in the second dummy element.

4. The light-emitting device according to claim 1, wherein the virtual region is arranged so as to surround the display region.

5. The light emitting device according to claim 1,

the second electrode is shared by the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element, an

The light emitting device further includes a contact region configured to supply an electric potential to the second electrode such that the dummy region is disposed between the contact region and the display region.

6. The light emitting device according to claim 4,

the second electrode is shared by the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element,

the light-emitting device further includes a contact region configured to supply an electric potential to the second electrode such that the dummy region is arranged between the contact region and the display region, and

the contact region is arranged to surround the dummy region.

7. The light emitting device according to claim 5,

the light emitting device includes a plurality of the first light emitting elements and a plurality of the second light emitting elements,

any one of a plurality of the second light emitting elements is arranged between first light emitting elements adjacent to each other among the plurality of the first light emitting elements in the first direction,

at least any one of the plurality of first light emitting elements and the plurality of second light emitting elements is continuously arranged in a second direction intersecting the first direction, an

The contact region is arranged outside an outer edge of the dummy region intersecting the first direction along the second direction.

8. The light emitting device according to claim 3,

the light emitting device further includes a contact region configured to supply an electric potential to the second electrode such that the dummy region is disposed between the contact region and the display region,

the light emitting device includes a plurality of the first light emitting elements, a plurality of the second light emitting elements, a plurality of the first dummy elements, and a plurality of the second dummy elements,

in the first direction, any one of the plurality of second light emitting elements is arranged between first light emitting elements adjacent to each other among the plurality of first light emitting elements, and any one of the plurality of second dummy elements is arranged between first dummy elements adjacent to each other among the plurality of first dummy elements,

in a second direction intersecting the first direction, at least any one of a plurality of the first light emitting elements and a plurality of the second light emitting elements is continuously arranged, and at least any one of a plurality of the first dummy elements and a plurality of the second dummy elements is continuously arranged, an

9. The light-emitting device of claim 1,

the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element each further include a color filter disposed over the second electrode, an

The color filter that transmits light having a wavelength different from that of light resonating between the reflective layer and the light-emitting layer is disposed on each of the first dummy element and the second dummy element.

10. The light-emitting device according to claim 9, wherein in each of the first and second dummy elements, light that resonates between the reflective layer and the light-emitting layer and light that is transmitted by the color filter disposed on the dummy element have a complementary color relationship.

11. The light emitting device according to claim 9,

color filters of the color filters disposed on the first and second dummy elements have the same color.

12. The light emitting device according to claim 1,

the light emitting device further includes an intermediate region between the display region and the dummy region, in which a first intermediate dummy element and a second intermediate dummy element are arranged, and which does not display an image,

a distance from the reflective layer to the light emitting layer in the first intermediate dummy element is different from a distance from the reflective layer to the light emitting layer in the second intermediate dummy element, an

In a case where a difference between a distance from the reflective layer to the light emitting layer in the first intermediate dummy element and a distance from the reflective layer to the light emitting layer in the second intermediate dummy element is set as a third difference, the first difference is equal to the third difference.

13. The light emitting device according to claim 12,

a plurality of the first light emitting elements and a plurality of the second light emitting elements are arranged in a predetermined order in the display region,

in the intermediate region, a plurality of the first intermediate dummy elements and a plurality of the second intermediate dummy elements are arranged in a predetermined order, an

The relationship regarding the arrangement order of the plurality of first light emitting elements and the plurality of second light emitting elements in the display area and the distance between the reflective layer and the light emitting layer of the first light emitting elements and the second light emitting elements is similar to the relationship regarding the arrangement order of the plurality of first intermediate virtual elements and the plurality of second intermediate virtual elements in the intermediate area and the distance between the reflective layer and the light emitting layer of the first intermediate virtual elements and the second intermediate virtual elements.

14. The light emitting device according to claim 12,

the display region includes a plurality of light emitting elements including the first light emitting element and the second light emitting element,

the dummy area includes a plurality of dummy elements including the first dummy element and the second dummy element,

the intermediate region includes a plurality of intermediate virtual elements including the first intermediate virtual element and the second intermediate virtual element, an

The number of intermediate dummy elements arranged between a light emitting element of the plurality of light emitting elements arranged at an outer edge of the display region and a dummy element of the plurality of dummy elements closest to the light emitting element is 2 or more and 10 or less.

15. A light emitting device includes a display region in which a first light emitting element and a second light emitting element are arranged for displaying an image, and a dummy region in which a first dummy element and a second dummy element are arranged and in which an image is not displayed,

wherein the first light emitting element, the second light emitting element, the first dummy element, and the second dummy element each include a reflective layer disposed on a substrate, a first electrode disposed over the reflective layer, a light emitting layer disposed over the first electrode, a second electrode disposed over the light emitting layer, and an insulating layer disposed between the reflective layer and the first electrode,

a film thickness of the insulating layer of the first light emitting element is different from a film thickness of the insulating layer of the second light emitting element, an

In a case where a difference between the film thickness of the insulating layer of the first light emitting element and the film thickness of the insulating layer of the second light emitting element is set as a first difference, and a difference between the film thickness of the insulating layer of the first dummy element and the film thickness of the insulating layer of the second dummy element is set as a second difference, the second difference is smaller than the first difference.

16. The light-emitting device according to claim 15, wherein a film thickness of the insulating layer of the first dummy element is equal to a film thickness of the insulating layer of the second dummy element.

17. The light-emitting device according to claim 15, wherein a film thickness of the insulating layer of the first dummy element is different from a film thickness of the insulating layer of the second dummy element.

18. The light-emitting device according to claim 15, wherein the virtual region is arranged so as to surround the display region.

19. The light-emitting device of claim 15,

20. The light emitting device of claim 18,

the contact region is arranged to surround the dummy region.

21. The light emitting device of claim 19,

22. The light emitting device of claim 17,

23. The light emitting device of claim 15,

24. The light-emitting device according to claim 23, wherein in each of the first and second dummy elements, light that resonates between the reflective layer and the light-emitting layer and light that is transmitted by the color filter arranged on the dummy element have a complementary color relationship.

25. The light-emitting device of claim 23,

26. The light emitting device of claim 15,

a film thickness of the insulating layer of the first intermediate dummy element is different from a film thickness of the insulating layer of the second intermediate dummy element, an

In a case where a difference between a film thickness of the insulating layer of the first intermediate dummy element and a film thickness of the insulating layer of the second intermediate dummy element is set as a third difference, the first difference is equal to the third difference.

27. The light emitting device of claim 26,

The relationship regarding the arrangement order of the plurality of first light emitting elements and the plurality of second light emitting elements in the display region and the film thicknesses of the insulating layers of the first light emitting elements and the second light emitting elements is similar to the relationship regarding the arrangement order of the plurality of first intermediate dummy elements and the plurality of second intermediate dummy elements in the intermediate region and the film thicknesses of the insulating layers of the first intermediate dummy elements and the second intermediate dummy elements.

28. The light emitting device of claim 26,

29. A display device comprising the light-emitting device according to any one of claims 1 to 28 and an active element connected to the light-emitting device.

30. A photoelectric conversion apparatus includes an optical unit including a plurality of lenses, an image sensor configured to receive light passing through the optical unit, and a display unit configured to display an image,

wherein the display unit is configured to display an image captured by the image sensor, and includes the light-emitting device according to any one of claims 1 to 28.

31. An electronic apparatus includes a housing for equipping a display unit, and a communication unit provided in the housing and configured to communicate with the outside,

wherein the display unit comprises the light emitting device according to any one of claims 1 to 28.

32. A lighting device includes at least one of a light diffusing unit and an optical film, and a light source,

wherein the light source comprises a light emitting device according to any one of claims 1 to 28.

33. A mobile body includes a body and an illumination unit provided in the body,

wherein the illumination unit comprises a light emitting device according to any one of claims 1 to 28.