Display device, display device manufacturing method, and electronic device

Abstract

To further improve luminous efficiency while retaining advantages of a white method.SOLUTION: In a display apparatus according to an embodiment, each of a plurality of pixels partitioned by a partition part includes: a first electrode, a first light emitting layer, a first light emission separation layer, a second light emitting layer, a second light emission separation layer, a third light emitting layer, and a second electrode which are stacked on a substrate; a reflector located on the substrate and between the substrate and the first electrode; and an optical adjustment layer located between the reflector and the first electrode. A film thickness of the first emission separation layer is different from that of the second emission separation layer. An area of the light emitting unit in the first pixel, an area of the light emitting unit in the second pixel, and the area of the light emitting unit in the third pixel are different with one another. A film thickness of the optical adjustment layer in each pixel is different between the first pixel, the second pixel, and the third pixel.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] The present disclosure relates to a display device, a method for manufacturing a display device, and an electronic device. [Background technology]

[0002] In recent years, organic EL display devices, which utilize the electroluminescence (EL) of organic materials, have been attracting attention as a display device to replace liquid crystal display devices. Organic EL display devices are increasingly being applied not only to direct-view display devices such as monitors, but also to ultra-compact display devices that require a fine pixel pitch of about several microns.

[0003] One method for achieving color display in organic EL display devices is to form organic EL material layers of multiple colors, such as red, green, and blue light, for each pixel using a mask. Hereinafter, this method may be referred to as the color-coded method. The color-coded method has excellent luminous efficiency and is often used in direct-view display devices.

[0004] However, the finer the pixel pitch, the more difficult it becomes to form an organic EL material layer for each pixel using a mask due to factors such as alignment accuracy. Therefore, for organic EL display devices with a fine pixel pitch of about several microns, a method is preferred in which a white-emitting organic EL material layer is formed in common for all pixels and combined with a color filter. Hereinafter, this method may be referred to as the white method.

[0005] A white-emitting organic EL material layer can be formed by stacking, for example, red-, green-, and blue-emitting light-emitting layers. To obtain well-balanced white light, it is necessary to maintain a good balance in the light-emitting intensities of the light-emitting layers of each color. For this reason, a technique is known in which an intermediate layer (light-emitting separation layer) is formed between the light-emitting layers to allow each light-emitting layer to emit light in a well-balanced manner (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-258022 Summary of the Invention [Problem to be solved by the invention]

[0007] As mentioned above, the white mode is suitable for organic EL display devices with a fine pixel pitch. However, in the white mode, light emitted by carrier recombination is distributed among multiple light-emitting layers. As a result, the green and blue light emitted from the red display pixel, the red and blue light emitted from the green display pixel, and the red and green light emitted from the blue display pixel do not contribute to the display. In other words, the white mode has a low internal light-emitting efficiency, which poses a problem: more power is required to achieve high brightness. For this reason, there has been a demand for technology that can further increase light-emitting efficiency while retaining the advantages of the white mode.

[0008] Therefore, an object of the present disclosure is to provide a display device that can further improve luminous efficiency while retaining the advantages of the white system, an electronic device equipped with such a display device, and a method for manufacturing such a display device. [Means for solving the problem]

[0009] In order to achieve the above object, the display device according to the present disclosure comprises: Pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, The organic layer includes a plurality of different light-emitting layers and a light-emitting separation layer, The plurality of different types of light-emitting layers are laminated as a continuous common layer across each pixel, the light-emitting separation layer is disposed between two adjacent light-emitting layers and is formed to have a different configuration depending on the display color of the pixel; It is a display device.

[0010] In order to achieve the above object, a method for manufacturing a display device according to the present disclosure includes: A method for manufacturing a display device in which pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, forming a first electrode corresponding to each pixel; a step of stacking a plurality of different types of light-emitting layers as a continuous common layer on the entire surface including the first electrode, and forming a light-emitting separation layer disposed between two adjacent light-emitting layers so as to have a different configuration depending on the display color of the pixel; having A method for manufacturing a display device.

[0011] In order to achieve the above object, an electronic device according to the present disclosure includes: Pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, The organic layer includes a plurality of different light-emitting layers and a light-emitting separation layer, The plurality of different types of light-emitting layers are laminated as a continuous common layer across each pixel, the light-emitting separation layer is disposed between two adjacent light-emitting layers and is formed to have a different configuration depending on the display color of the pixel; The electronic device has a display device. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic plan view of a display device according to a first embodiment. [Figure 2] FIG. 2 is a schematic plan view for explaining the arrangement of pixels in the display region. [Figure 3] FIG. 3 is a schematic partial cross-sectional view of the display device. [Figure 4] FIG. 4 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section. [Figure 5] FIG. 5 is a schematic cross-sectional view illustrating recombination of carriers in a light-emitting portion that emits white light by additive color mixing. [Figure 6] FIG. 6 is a schematic cross-sectional view for explaining a case where red light is extracted via a color filter from a light-emitting section that emits white light containing a large amount of red components. [Figure 7] FIG. 7 is a schematic cross-sectional view for explaining a case where blue light is extracted via a color filter from a light-emitting section that emits white light containing a large amount of blue components. [Figure 8] FIG. 8 is a schematic cross-sectional view for explaining a case where green light is extracted via a color filter from a light-emitting section that emits white light containing a large amount of green components. [Figure 9] FIG. 9 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section when the emission separation layer is made of an electron transport material. [Figure 10] FIG. 10 is a schematic cross-sectional view illustrating a substrate in which partition walls are formed between adjacent first electrodes. [Figure 11] FIG. 11 is a schematic diagram for explaining the vapor deposition process of the light-emitting layer and the light-emitting separation layer. [Figure 12] FIG. 12 is a schematic cross-sectional view illustrating a modified example of a substrate in which a partition wall is formed between adjacent first electrodes. [Figure 13] FIG. 13 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to the second embodiment. [Figure 14] FIG. 14 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to a modified example of the second embodiment. [Figure 15] FIG. 15 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to the third embodiment. [Figure 16]FIG. 16 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to the fourth embodiment. [Figure 17] FIG. 17 is a schematic plan view illustrating an arrangement of pixels in a display device according to the fifth embodiment. [Figure 18] FIG. 18 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section. [Figure 19] FIG. 19 is a schematic cross-sectional view for explaining an example of the configuration of a substrate used in manufacturing a display device according to the fifth embodiment. [Figure 20] Fig. 20A is a schematic cross-sectional view illustrating a first example of a resonator structure, and Fig. 20B is a schematic cross-sectional view illustrating a second example of a resonator structure. [Figure 21] Fig. 21A is a schematic cross-sectional view illustrating a third example of the resonator structure, and Fig. 21B is a schematic cross-sectional view illustrating a fourth example of the resonator structure. [Figure 22] Fig. 22A is a schematic cross-sectional view illustrating a fifth example of the resonator structure, and Fig. 22B is a schematic cross-sectional view illustrating a sixth example of the resonator structure. [Figure 23] FIG. 23 is a schematic cross-sectional view illustrating a seventh example of the resonator structure. [Figure 24] FIG. 24 shows the appearance of a single-lens reflex digital still camera with interchangeable lenses, with FIG. 24A showing a front view and FIG. 24B showing a rear view. [Figure 25] FIG. 25 is an external view of a head-mounted display. [Figure 26] FIG. 26 is an external view of a see-through head-mounted display. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, the present disclosure will be described based on embodiments with reference to the drawings. The present disclosure is not limited to the embodiments, and various numerical values ​​and materials in the embodiments are examples. In the following description, the same elements or elements having the same functions will be designated by the same reference numerals, and redundant description will be omitted. The description will be given in the following order. 1. General Description of the Display Device, Display Device Manufacturing Method, and Electronic Device of the Present Disclosure 2. First embodiment 3. Second embodiment 4. Third Embodiment 5. Fourth Embodiment 6. Fifth Embodiment 7. Examples of resonator structures applicable to each embodiment 8. Description of electronic devices, etc.

[0014] [General Description of Display Device, Display Device Manufacturing Method, and Electronic Device of the Present Disclosure] In the display device according to the present disclosure, the display device used in the electronic device according to the present disclosure, and the display device obtained by the manufacturing method of the display device according to the present disclosure (hereinafter, these may be simply referred to as the "display device according to the present disclosure"), as described above, Pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, The organic layer includes a plurality of different light-emitting layers and a light-emitting separation layer, The plurality of different types of light-emitting layers are laminated as a continuous common layer across each pixel, the light-emitting separation layer is disposed between two adjacent light-emitting layers and is formed to have a different configuration depending on the display color of the pixel; In this case, the light-emitting separation layer may be formed so that its film thickness varies depending on the display color of the pixel.

[0015] In this case, the emission separation layer may be formed using at least one of a hole transporting material, an electron transporting material, and a positive and negative charge transporting material.

[0016] Alternatively, in the display device of the present disclosure, the emission separation layer may be formed using materials whose compositions differ depending on the display color of the pixel.

[0017] The emission separation layer may be formed by co-evaporating a plurality of different materials. The emission separation layer may be formed so that the concentration relationship of the plurality of different materials varies depending on the display color of the pixel. The emission separation layer may also be formed by co-evaporating at least two of a hole transport material, an electron transport material, and a positive and negative charge transport material.

[0018] Alternatively, in the display device of the present disclosure, the emission separation layer may be configured to be formed by laminating a plurality of different materials. The emission separation layer may be configured to be formed so that the lamination ratio of the plurality of different materials varies depending on the display color of the pixel. Furthermore, the emission separation layer may be configured to be formed by laminating at least two of a hole transport material, an electron transport material, and a positive and negative charge transport material.

[0019] Alternatively, in the display device of the present disclosure, the organic layer includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer that are different from each other, The light-emitting layers are arranged as a continuous common layer across each pixel in the order of a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer, the light-emitting separation layer comprises a first light-emitting separation layer disposed between the first light-emitting layer and the second light-emitting layer, and a second light-emitting separation layer disposed between the second light-emitting layer and the third light-emitting layer; In this case, at least one of the first light-emitting separation layer and the second light-emitting separation layer may be configured to have a different configuration depending on the display color of the pixel. The first light-emitting separation layer and the second light-emitting separation layer may be configured to be formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material.

[0020] In the display device of the present disclosure including the various preferred configurations described above, the organic layer includes a red light-emitting layer, a blue light-emitting layer, and a green light-emitting layer, The light-emitting layers are laminated in the order of red light-emitting layer, blue light-emitting layer, and green light-emitting layer as a continuous common layer across each pixel. It can be configured as follows.

[0021] In the display device of the present disclosure, including the various preferred configurations described above, a color filter corresponding to the color to be displayed may be disposed on the upper surface of each pixel. For color display, for example, red, blue, and green color filters may be disposed. The color filters may be formed by appropriately patterning a layer containing a known pigment or dye. It is also possible to dispose a transparent color filter in addition to the red, blue, and green color filters. In this configuration, an image can be displayed using a white pixel in addition to the red, blue, and green pixels, thereby improving brightness.

[0022] In the display device of the present disclosure including the various preferred configurations described above, the pixel may be configured to have a resonator structure that resonates light generated in the light-emitting portion. By providing a resonator structure corresponding to the color of light to be displayed, color purity and peak intensity can be improved. Various resonator structures can be applied to the display device of the present disclosure.

[0023] In the method for manufacturing a display device according to the present disclosure, as described above, forming a first electrode corresponding to each pixel; a step of stacking a plurality of different types of light-emitting layers as a continuous common layer on the entire surface including the first electrode, and forming a light-emitting separation layer disposed between two adjacent light-emitting layers so as to have a different configuration depending on the display color of the pixel; It has.

[0024] In this case, The method further includes forming a partition wall between adjacent first electrodes, a ratio between the height of a partition wall portion surrounding the first electrode and the width of the first electrode is set to vary depending on the luminescent color of the pixel, and the light-emitting layer is line-deposited with a predetermined film-forming width, and the light-emitting separation layer is line-deposited with a film-forming width wider than the film-depositing width of the light-emitting layer; It can be configured as follows.

[0025] This configuration can accommodate fine pixel pitches, and the light-emitting layer can be formed in a simple manner by linearly evaporating the light-emitting separation layer, which is disposed between two adjacent light-emitting layers, and can be configured differently depending on the display color of the pixel.

[0026] In the display device, display device manufacturing method, and electronic device (hereinafter, these may be simply referred to as the present disclosure) of the present disclosure, including the various preferred configurations described above, the first electrode can be formed using a light-reflective conductive material such as aluminum (Al), aluminum alloy, platinum (Pt), gold (Au), chromium (Cr), or tungsten (W). Alternatively, well-known transparent conductive materials such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO) can also be used. In this case, it is preferable to laminate the first electrode with a reflective layer made of a light-reflective material. The first electrode can be formed by combining a well-known film-forming method, such as sputtering, with a well-known patterning method, such as etching or lift-off.

[0027] In the present disclosure, the second electrode is preferably made of a material with good optical transparency and a small work function. For example, it can be made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), or a metal material such as magnesium (Mg), silver (Ag), or an alloy thereof. The thickness of the second electrode is preferably set to about 3 to 100 nanometers. The second electrode may also be made of a multilayer film. The second electrode can be configured as an electrode common to each pixel, and can be formed by a film formation method such as sputtering.

[0028] The light-emitting material constituting the light-emitting layer may be fluorescent or phosphorescent. The composition of the light-emitting material is not particularly limited, and well-known materials such as a mixture of 4,4-bis(2,2-diphenylvinyl)biphenyl (DPVBi) and 2,6-bis[(4'-methoxydiphenylamino)styryl]-1,5-dicyanonaphthalene (BSN) (red light emission), a mixture of DPVBi and 4,4'-bis[2-{4-(N,N-diphenylamino)phenyl}vinyl]biphenyl (DPAVBi) (blue light emission), or a mixture of DPVBi and coumarin 6 (green light emission) can be used. Furthermore, the light-emitting layers for each color can be formed by appropriately adding a carrier transport material, such as an electron or hole transport material, in addition to the light-emitting materials described above.

[0029] Hole-transporting materials are also used in hole-injection layers that help inject holes into the light-emitting layer, and examples of such materials include well-known materials such as copper phthalocyanine, hexaazatriphenylene (HAT), and α-NPD [N,N'-di(1-naphthyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine]. Electron-transporting materials are also used in electron-injection layers that help inject electrons into the light-emitting layer, and examples of such materials include well-known materials such as BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), metal complexes of 8-hydroxyquinoline or its derivatives, and nitrogen-containing heterocyclic derivatives (e.g., tris(8-quinolinol)aluminum complex, benzimidazole derivatives, phenanthroline derivatives, and imidazopyridine derivatives). Examples of the bipolar charge transport material include materials such as aminostyryl compounds, as well as materials obtained by co-evaporating a hole transport material and an electron transport material.

[0030] Examples of pixel values ​​for a display device include VGA (640,480), S-VGA (800,600), XGA (1024,768), APRC (1152,900), S-XGA (1280,1024), U-XGA (1600,1200), HD-TV (1920,1080), Q-XGA (2048,1536), as well as some image display resolutions such as (1920,1035), (720,480), and (1280,960), but are not limited to these values.

[0031] The insulating film used in the display device can be formed using a material appropriately selected from known inorganic or organic materials, and can be formed by a known film formation method such as a physical vapor deposition method (PVD method) exemplified by a vacuum deposition method or a sputtering method, various chemical vapor deposition methods (CVD methods), etc. Furthermore, when these are patterned, this can be done by combining known patterning methods such as an etching method or a lift-off method.

[0032] In the display device according to the present disclosure, the configuration of the drive circuit that controls the light emission of the light-emitting unit is not particularly limited. The light-emitting unit may be formed, for example, in a certain plane on a substrate, and may be arranged above the drive circuit that drives the light-emitting unit via an interlayer insulating layer. The configuration of the transistors that make up the drive circuit is not particularly limited. They may be p-channel field-effect transistors or n-channel field-effect transistors.

[0033] Examples of materials for the substrate include semiconductor materials, glass materials, and plastic materials. When the drive circuit is configured with transistors formed on a semiconductor substrate, for example, a well region may be provided in a semiconductor substrate made of silicon, and the transistors may be formed in the well. On the other hand, when the drive circuit is configured with thin film transistors or the like, a substrate made of glass or plastic material may be used, and a semiconductor thin film may be formed thereon to form the drive circuit. Various wiring may have known configurations and structures.

[0034] The various conditions in this specification are satisfied not only when they are strictly met, but also when they are substantially met. Various variations arising from design or manufacturing are permitted. Also, the drawings used in the following explanation are schematic. For example, Figure 2, which will be described later, shows the cross-sectional structure of a display device, but does not indicate the proportions of width, height, thickness, etc.

[0035] [First embodiment] The first embodiment relates to a display device, a method for manufacturing a display device, and an electronic device according to the present disclosure.

[0036] 1 is a schematic plan view of a display device according to a first embodiment of the present disclosure. The display device 1 includes a display area 11 in which pixels 10, each including a light-emitting portion ELP and a drive circuit for driving the light-emitting portion ELP, are arranged in a two-dimensional matrix while being connected to scanning lines SCL extending in the row direction (the X direction in FIG. 1) and data lines DTL extending in the column direction (the Y direction in FIG. 1), a power supply unit 100 that supplies voltage to power supply lines PS1, a scanning unit 101 that supplies scanning signals to the scanning lines SCL, and a data driver 102 that supplies signal voltage to the data lines DTL. For convenience of illustration, FIG. 1 shows the wiring relationship for one pixel 10, more specifically, for the (q, p)th pixel 10 described below.

[0037] The display device 1 further includes a common power supply line PS2 commonly connected to all the pixels 10. A predetermined driving voltage is supplied to the power supply line PS1 from the power supply unit 100, and a common voltage (for example, ground potential) is supplied to the common power supply line PS2.

[0038] 1, a total of Q×P pixels (display elements) 10 are arranged in a two-dimensional matrix, Q in the row direction and P in the column direction, in the display area 11. The number of rows of the pixels 10 in the display area is P, and the number of pixels 10 constituting each row is Q.

[0039] The number of scanning lines SCL and power supply lines PS1 is P. The pixel 10 in the p-th row (where p=1, 2, . . . , P) is connected to the p-th scanning line SCL p , p-th feeder PS1 p , which constitute one display element row. p and power supply line PS1 p Only the following is shown.

[0040] The number of data lines DTL is Q. The pixel 10 in the qth column (where q=1, 2, . . . , Q) is connected to the qth data line DTL q In FIG. 1, the data line DTL q Only the following is shown.

[0041] FIG. 2 is a schematic plan view illustrating the arrangement of pixels in a display area. The display device 1 is, for example, a color display device. One pixel 10 constitutes one sub-pixel. In the following description, a red display pixel is designated by the reference numeral 10. R , the blue display pixel is designated by 10 B , and the green display pixel is designated by 10 G Furthermore, when the type of pixel is not limited, these will be collectively referred to simply as pixel 10.

[0042] The display device 1 is line-sequentially scanned row by row by a scanning signal from the scanning unit 101. The pixel 10 located in the pth row and qth column will hereinafter be referred to as the (q,p)th pixel 10 or the (q,p)th pixel 10.

[0043] In the display device 1, Q pixels 10 arranged in the pth row are driven simultaneously. In other words, the timing of light emission / non-emission of the Q pixels 10 arranged along the row direction is controlled for each row to which they belong. If the display frame rate of the display device 1 is represented as FR (times / second), the scanning period per row (so-called horizontal scanning period) when the display device 1 is line-sequentially scanned row by row is less than (1 / FR) × (1 / P) seconds.

[0044] As shown in Fig. 1, the pixel 10 is composed of a light-emitting portion ELP and a drive circuit for driving the light-emitting portion ELP. The light-emitting portion ELP is composed of an organic electroluminescence light-emitting portion. The drive circuit includes a write transistor TR W , and the driving transistor TR D , and a capacitance section C1. D When a current flows to the light emitting portion ELP via the transistors, the light emitting portion ELP emits light. Each transistor is composed of a p-channel field effect transistor.

[0045] In the pixel 10, the driving transistor TR DOne of the source / drain regions of the driving transistor TR is connected to one end of the capacitance section C1 and the power supply line PS1, and the other of the source / drain regions is connected to one end of the light emitting section ELP (specifically, the anode electrode). D The gate electrode of the write transistor TR W and the other end of the capacitance section C1.

[0046] Also, the write transistor TR W , one of the source / drain regions is connected to a data line DTL, and the gate electrode is connected to a scanning line SCL.

[0047] The other end of the light emitting portion ELP (specifically, the cathode electrode) is connected to a common power supply line PS2. A predetermined cathode voltage V Cat The capacitance of the light emitting section ELP is represented by the symbol C EL It is expressed as:

[0048] An outline of driving the pixel 10 will be described. In a state where a voltage corresponding to the luminance of an image to be displayed is supplied from the data driver 102 to the data line DTL, the write transistor TR W When the write transistor TR is turned on, a voltage corresponding to the brightness of the image to be displayed is written into the capacitor C1. W is turned off, the driving transistor TR D When a current flows through the light emitting portion ELP, the light emitting portion ELP emits light.

[0049] Note that the present disclosure does not particularly limit the configuration of the drive circuit that controls the light emission of the pixel 10. Therefore, the configuration shown in Fig. 1 is merely an example, and the display device according to this embodiment can have various configurations.

[0050] Next, the basic structure of the display device 1 will be described.

[0051] FIG. 3 is a schematic partial cross-sectional view of the display device according to the first embodiment.

[0052] In the display device 1, pixels 10, each including a light-emitting section 50 formed by laminating a first electrode 31, an organic layer 40, and a second electrode 61, are arranged in a two-dimensional matrix. The light-emitting section 50 corresponds to the light-emitting section ELP in FIG. 1.

[0053] The organic layer 40 includes a plurality of different types of light-emitting layers and a light-emitting separation layer IL. The light-emitting separation layer IL is disposed between two adjacent light-emitting layers and is formed to have a different configuration depending on the display color of the pixel 10. For convenience of illustration, the configuration of the organic layer 40 is shown in a simplified form in FIG.

[0054] As will be described in detail later with reference to Fig. 4 etc., each of the different types of light-emitting layers is laminated as a continuous common layer across each pixel 10. The light-emitting separation layer IL is disposed between two adjacent light-emitting layers, and is formed so as to have a different configuration depending on the display color of the pixel 10.

[0055] The light-emitting section 50 is configured by laminating a first electrode 31, an organic layer 40, and a second electrode 61. In the following description, the red display pixel 10 R The light emitting part corresponding to R , blue display pixel 10 B The light emitting part corresponding to B , green display pixel 10 G The light emitting part corresponding to G Furthermore, when there is no limitation on the type of light-emitting unit, these will be collectively referred to simply as light-emitting unit 50. The same applies to other reference numerals.

[0056] The first electrodes 31 are formed so as to correspond to each pixel 10. Between adjacent first electrodes, partition walls 32 are formed as inter-pixel insulating films. An organic layer 40 and a second electrode 61 are laminated over the entire surface, including the first electrodes 31 and the partition walls 32. A color filter 63 is disposed thereon via a protective film 62, and a transparent front substrate 64 is disposed thereon.

[0057] The first electrodes 31 are formed on the planarization film 27 so as to correspond to each pixel 10, and function as anode electrodes. On the other hand, the second electrodes 61 are formed as electrodes common to each pixel 10, and function as cathode electrodes.

[0058] The substrate 20 comprises a base material 21, a gate electrode 22 formed on the base material 21, a gate insulating film 23 formed so as to cover the entire surface including the surface of the gate electrode 22, a semiconductor material layer 24, an interlayer insulating film 25 formed so as to cover the entire surface including the surface of the semiconductor material layer 24, source / drain electrodes 26 connected to the source / drain regions of a transistor formed in the semiconductor material layer 24, and a planarizing film 27 formed so as to cover the entire surface including the surface of the source / drain electrodes 26.

[0059] The substrate 20 includes a drive circuit for driving the pixels 10, which is configured with the above-mentioned transistors and the like. The first electrode 31 and the drive circuit are electrically connected. More specifically, the first electrode 31 is connected to source / drain electrodes 26 of the transistor formed in the semiconductor material layer 24 via contact plugs 28. The contact plugs 28 are made of a metal material such as copper (Cu) or a copper alloy, and are formed in openings provided in the planarization film 27.

[0060] The base material 21 can be made of, for example, a glass material, a semiconductor material, a plastic material, etc. On this base material 21, a drive circuit including a thin film transistor that controls the light emission of the light emitting section 50 is formed.

[0061] The gate electrodes 22 of the various transistors that make up the drive circuit can be formed using, for example, a metal such as aluminum (Al) or polysilicon. A gate insulating film 23 is provided on the entire surface of the substrate 21 so as to cover the gate electrodes 22. The gate insulating film 23 is formed of, for example, silicon oxide (SiO x ) and silicon nitride (SiN x ) or the like.

[0062] The semiconductor material layer 24 can be formed on the gate insulating film 23 using, for example, amorphous silicon, polycrystalline silicon, or an oxide semiconductor. A portion of the semiconductor material layer 24 is doped with impurities to form a source / drain region. A region of the semiconductor material layer 24 located between one source / drain region and the other source / drain region and above the gate electrode 22 forms a channel region. These elements form a bottom-gate thin-film transistor on the substrate 21. The source / drain regions and the channel region are not shown in FIG. 3 .

[0063] The interlayer insulating film 25 is provided on the semiconductor material layer 24. The interlayer insulating film 25 is made of, for example, silicon oxide (SiO x ), silicon nitride (SiN x ), or silicon oxynitride (SiO x N y The source / drain electrodes 26 are connected to the semiconductor material layer 24 via contact holes formed in the interlayer insulating film 25. The source / drain electrodes 26 are made of a metal such as aluminum (Al).

[0064] The planarization film 27 is formed to cover and planarize the drive circuit etc. The planarization film 27 is made of, for example, an organic insulating film such as a polyimide resin, an acrylic resin, or a novolac resin, or a silicon oxide (SiO x ), silicon nitride (SiN x ), or silicon oxynitride (SiO x N yThe insulating film can be formed using an inorganic insulating film such as a SiO 2 film.

[0065] The contact plug 28 is made of a metal material such as copper (Cu) or a copper alloy, and is formed in an opening provided in the planarization film 27. The first electrode 31 and the source / drain electrode 26 of the driving transistor are electrically connected by the contact plug 28.

[0066] The first electrode 31 is made of a light-reflecting material such as aluminum (Al). In some cases, the first electrode 31 may be made by laminating a transparent conductive material and the light-reflecting material described above. The thickness of the first electrode 31 is preferably set to a range of approximately 100 to 300 nanometers.

[0067] The organic layer 40 is formed on the entire surface, including on the first electrode 31 and the partition wall 32. The light-emitting layer of the organic layer 40 is formed in common across all pixels 10, and basically emits white light. The second electrode 61 is formed on the entire surface, including on the organic layer 40. The second electrode 61 is made of a material with good light transmittance and a small work function, such as indium zinc oxide (IZO).

[0068] The protective film 62 is formed on the entire surface including the second electrode 61. The protective film 62 is intended to prevent moisture from entering the organic layer 40, and is formed using a material with low water permeability. Examples of the material for the protective film 62 include silicon nitride (SiN x ), silicon oxide (SiO x ), aluminum oxide (AlO x ), titanium oxide (TiO x ), or a combination of these.

[0069] A color filter corresponding to the color to be displayed is disposed on the upper surface of each pixel. R Color filters corresponding to 63 R , blue display pixel 10 B Color filters corresponding to 63 B, green display pixel 10 G Color filters corresponding to 63 G Light from the light emitting section 50 is emitted through a color filter 63 and a front substrate 64, and is observed as an image.

[0070] The above has described the basic structure of the display device 1. Next, the layered structure in the light-emitting section will be described in detail.

[0071] FIG. 4 is a schematic cross-sectional view for explaining the stacking relationship between the lower electrode, the organic layer, and the upper electrode in the light-emitting section.

[0072] As shown in FIG. 4, the light-emitting unit 50 is configured by stacking a first electrode 31, an organic layer 40, and a second electrode 61. The organic layer 40 includes different light-emitting layers, such as a first light-emitting layer (hereinafter referred to as a red light-emitting layer) 43, a second light-emitting layer (hereinafter referred to as a blue light-emitting layer) 44, and a third light-emitting layer (hereinafter referred to as a green light-emitting layer) 45, and further includes an emission separation layer IL. The organic layer 40 also includes a hole injection layer 41, a hole transport layer 42, and an electron transport layer 46. The light-emitting layers are stacked in the order of the red light-emitting layer 43, the blue light-emitting layer 44, and the green light-emitting layer 45 as a continuous common layer across each pixel. The same applies to the hole injection layer 41, the hole transport layer 42, and the electron transport layer 46.

[0073] The emission separation layer IL is disposed between two adjacent emission layers, more specifically, between the red emission layer 43 and the blue emission layer 44. The emission separation layer IL can be formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material. Figure 4 shows the emission separation layer IL made of a hole transport material.

[0074] 4, the light-emitting section 50 has a laminated structure including a first electrode 31, a hole injection layer 41, a hole transport layer 42, a red light-emitting layer 43, a light-emitting separation layer IL, a blue light-emitting layer 44, a green light-emitting layer 45, an electron transport layer 46, and a second electrode 61. Although it depends on the types of constituent materials, it is preferable that the hole injection layer 41 be in the range of 1 to 20 nanometers, the hole transport layer 42 be in the range of 10 to 200 nanometers, the various light-emitting layers be in the range of 5 to 50 nanometers, and the electron transport layer 43 be in the range of 10 to 200 nanometers.

[0075] In the display device 1, the light-emitting separation layer IL is formed so as to have a different configuration depending on the display color of the pixel 10. More specifically, the light-emitting separation layer IL is formed so as to have a different film thickness depending on the display color of the pixel. In the following description, the red display pixel 10 R Light-emitting unit 50 corresponding to R The light-emitting separation layer is designated as IL R , blue display pixel 10 B Light-emitting unit 50 corresponding to B The light-emitting separation layer is designated as IL B , green display pixel 10 G Light-emitting unit 50 corresponding to G The light-emitting separation layer is designated as IL G It is expressed as:

[0076] When the light-emitting separation layer IL is made of a hole transporting material, the relationship between the film thicknesses is as follows: Light-emitting separation layer IL R <Emitting separation layer IL B <Emitting separation layer IL G The film thickness of the light-emitting separation layer IL is preferably set in the range of about 0 to 20 nanometers, and it is desirable to set it so as to maintain the above-mentioned magnitude relationship within this film thickness range.

[0077] Here, the change in luminescent color depending on the thickness of the light-emitting separation layer IL will be described with reference to FIGS.

[0078] FIG. 5 is a schematic cross-sectional view illustrating recombination of carriers in a light-emitting portion that emits white light by additive color mixing.

[0079] When emitting white light without chromaticity bias by additively mixing light from the red light-emitting layer 43, blue light-emitting layer 44, and green light-emitting layer 45, it is necessary to balance the light emission intensity of each light-emitting layer. By sandwiching an emission separation layer IL between the light-emitting layers, the degree of carrier recombination in each light-emitting layer can be adjusted. Figure 5 shows a state in which the emission intensity of each light-emitting layer is balanced and white light without chromaticity bias is emitted. The emission separation layer at this time is designated by the symbol IL W Shown in.

[0080] When the light-emitting separation layer IL is made of a hole-transporting material, the effect of injecting holes into the light-emitting layer becomes relatively low when the light-emitting separation layer IL is made thin. W The light-emitting separation layer IL is thinner than R is sandwiched between the light-emitting layers, the center of carrier recombination shifts relatively toward the first electrode 31. As a result, the light emission intensity of the red light-emitting layer 43 becomes relatively stronger. Therefore, comparing the case in which red light is extracted from white light via a red filter shown in FIG. 5 with the case in which red light is extracted from white light via a red filter shown in FIG. 6, the latter case allows for the extraction of more intense red light.

[0081] On the other hand, if the emission separation layer IL is made thicker, the hole injection effect becomes relatively stronger. W If a thicker emission separation layer IL is sandwiched between the emission layers, the center of carrier recombination will shift relatively toward the second electrode 61. B By appropriately setting the film thickness, the center of carrier recombination can be brought closer to the blue light-emitting layer 44 (see FIG. 7). As explained in FIG. 6, when the case where blue light is extracted from white light shown in FIG. 5 is compared with the case where blue light is extracted from white light shown in FIG. 7, the latter case allows for the extraction of more intense blue light.

[0082] Furthermore, the light-emitting separation layer IL B <Emitting separation layer IL G The light-emitting separation layer ILG By appropriately setting the film thickness, the center of carrier recombination can be brought closer to green light-emitting layer 45 (see FIG. 8). As explained in FIG. 6, when comparing the case where green light is extracted from white light shown in FIG. 5 with the case where green light is extracted from white light shown in FIG. 8, the latter case allows for the extraction of more intense green light.

[0083] In the above description, the light-emitting separation layer IL is made of a hole-transporting material, but an electron-transporting material or a positive and negative charge-transporting material may also be used.

[0084] When the light-emitting separation layer IL is made of an electron transporting material, the effect of injecting electrons into the light-emitting layer changes. Therefore, the thicker the light-emitting separation layer IL is, the more the center of carrier recombination shifts relatively toward the first electrode 31. As shown in FIG. 9, when the light-emitting separation layer IL is made of an electron transporting material, the relationship between the film thickness is as follows: Light-emitting separation layer IL R >Light-emitting separation layer IL B >Light-emitting separation layer IL G The relationship is as follows.

[0085] When the light-emitting separation layer IL is made of a bipolar charge-transporting material, if the hole transport property is dominant in terms of contribution to light emission, the layering relationship will be as shown in Figure 4. On the other hand, if the electron transport property is dominant in terms of contribution to light emission, the layering relationship will be as shown in Figure 9.

[0086] The detailed structure of the display device 1 has been described above. A step of forming a first electrode 31 corresponding to each pixel 10; and a step of stacking a plurality of different types of light-emitting layers as a continuous common layer on the entire surface including the first electrode 31, and forming a light-emitting separation layer IL disposed between two adjacent light-emitting layers so as to have a different configuration depending on the display color of the pixel 10; The film can be produced by a production method having the following steps.

[0087] Specifically, for example, the manufacturing process can be as follows: A substrate 21 is prepared, and a predetermined film formation and patterning process is performed on the substrate to form a drive circuit including a thin-film transistor. Next, a planarization film 27 is formed on the entire surface, including the drive circuit. After that, patterning is performed to form an opening, and a contact plug 28 is embedded in the opening. Next, a first electrode 31 is formed by film formation and patterning.

[0088] Thereafter, a film of an inorganic insulating material such as silicon oxynitride (SiON) is formed on the entire surface including the first electrode 31. Subsequently, the film is patterned by lithography, dry etching, or the like so that the first electrode 31 is exposed, thereby forming the partition wall portion 32.

[0089] Next, the hole injection layer 41, hole transport layer 42, and red light-emitting layer 43 are formed in this order over the entire surface including the first electrode 31 and the partition wall 32. Thereafter, the light-emitting separation layer IL is formed by mask vapor deposition or transfer so as to have a different configuration depending on the display color of the pixel 10. Next, the blue light-emitting layer 44, green light-emitting layer 45, and electron transport layer 46 are formed in this order over the entire surface.

[0090] Thereafter, a second electrode 61 is formed over the entire surface, and further a protective film 62 is formed. Next, a color filter 63 and a front substrate 64 are arranged on the protective film 62, and the display device 1 can be obtained.

[0091] In the above-described method, the emission separation layer IL is formed by a mask vapor deposition method or a transfer method, but a process that does not require mask vapor deposition, etc. Specifically, in a state in which the ratio between the height of the partition wall portion 32 surrounding the first electrode 31 and the width of the first electrode 31 is set to differ depending on the emission color of the pixel 10, the emission layer is line-deposited with a predetermined film formation width, and the emission separation layer IL is line-deposited with a film formation width wider than the film formation width of the emission layer.

[0092] Fig. 10 is a schematic cross-sectional view illustrating a substrate on which a partition wall is formed between adjacent first electrodes, and Fig. 11 is a schematic view illustrating a vapor deposition process of a light-emitting layer and an emission separation layer.

[0093] 11, first electrodes 31 and partition walls 32 disposed between adjacent first electrodes are formed on the substrate 20. In the following description, the red light emitting section 50 R The width of the first electrode 31 corresponding to the red light emitting portion 50 is denoted by WR. R The height of the partition wall 32 surrounding the first electrode 31 corresponding to the blue light-emitting portion 50 is denoted by HR. B The width of the first electrode 31 corresponding to the blue light-emitting portion 50 is denoted by WB. B The height of the partition wall 32 surrounding the first electrode 31 corresponding to the green light-emitting portion 50 is denoted by HB. G The width of the first electrode 31 corresponding to the green light-emitting portion 50 is denoted by WG. G The height of the partition wall 32 surrounding the first electrode 31 corresponding to the height is denoted by the symbol HG.

[0094] Here, the widths WR, WB, and WG of the first electrodes 31 corresponding to each light-emitting section 50 are the same, whereas the height of the partition wall 32 surrounding the first electrodes 31 is formed to differ depending on the emission color of the pixel. As a result, the ratio between the height of the partition wall 32 surrounding the first electrodes 31 and the width of the first electrodes 31 is set to differ depending on the emission color of the pixel 10. Specifically, HR / WR>HB / WB>HG / WG The relationship is as follows:

[0095] 11, using this substrate 20, the light-emitting layer is line-deposited with a predetermined film-forming width, and the light-emitting separation layer IL is line-deposited with a film-forming width wider than the film-forming width of the light-emitting layer. When the film-forming width is narrow, even if the ratio between the height of the partition wall portion 32 surrounding the first electrode 31 and the width of the first electrode 31 changes, the film thickness on the substrate 20 is only slightly affected. In contrast, when the film-forming width is wide, the film thickness on the substrate 20 is significantly affected. Specifically, when the height of the partition wall portion 32 surrounding the first electrode 31 becomes larger relative to the width of the first electrode 31, the film thickness becomes relatively thinner. Therefore, in the example shown in FIG. 11, the light-emitting layer and the like are formed with approximately the same film thickness, whereas the light-emitting separation layer IL has a film thickness that varies depending on the light-emitting portion 50. R <Light emitting unit 50 B <Light emitting unit 50 G It is formed so that the relationship is as follows:

[0096] 12, it is also possible to configure the partitions 32 arranged between adjacent first electrodes so that their heights HR, WB, and WG are constant, and the width of the first electrodes 31 corresponding to each light-emitting section 50 varies depending on the luminescent color of the pixel. In this configuration as well, the ratio between the height of the partitions 32 surrounding the first electrodes 31 and the width of the first electrodes 31 is set to vary depending on the luminescent color of the pixel 10. Specifically, HR / WR>HB / WB>HG / WG 11 is performed using the substrate shown in FIG. 12, the light-emitting separation layer IL has a thickness of about 1 / 2 times that of the light-emitting section 50. R <Light emitting unit 50 B <Light emitting unit 50 G It is formed so that the relationship is as follows:

[0097] Incidentally, the pixel, including other embodiments described later, may be configured to have a resonator structure that resonates light generated in the light-emitting portion. By providing a resonator structure corresponding to the color of light to be displayed, color purity and peak intensity can be improved. Examples of applicable resonator structures will be described in detail later with reference to Figures 20 to 23 described later.

[0098] [Second embodiment] The second embodiment also relates to a display device, a method for manufacturing a display device, and an electronic device according to the present disclosure.

[0099] 1 and 3, the display device 1 can be read as the display device 2. The stacking order of the organic layers is the same as that in the first embodiment.

[0100] FIG. 13 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to the second embodiment.

[0101] In the display device 2, the emission separation layer IL is also formed so as to have a different configuration depending on the display color of the pixel 10. More specifically, the emission separation layer IL is formed using a hole transport material or an electron transport material whose configuration varies depending on the display color of the pixel.

[0102] In the display device 2, the emission separation layer is formed using materials whose compositions vary depending on the display color of the pixel. More specifically, the emission separation layer is formed by co-depositing a plurality of different materials. The emission separation layer is formed by co-depositing at least two of a hole transport material, an electron transport material, and a positive and negative charge transport material. Here, the emission separation layer will be described as being made of a co-deposited film in which a hole transport material is doped with an electron transport material.

[0103] The light-emitting separation layer IL is formed so that the concentration relationship of a plurality of different materials varies depending on the display color of the pixel. R , light-emitting separation layer IL B , light-emitting separation layer IL G The concentration of the electron transport material in Light-emitting separation layer IL R <Emitting separation layer IL B <Emitting separation layer IL G The range is set to, for example, 0 to 80 weight percent so that the magnitude relationship is as follows:

[0104] Next, a modified example will be described.

[0105] FIG. 14 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to a modified example of the second embodiment.

[0106] In this modification, the emission separation layer will also be described as being made of a co-deposited film in which a hole transport material is doped with an electron transport material. However, this is an example in which the concentration distribution in the stacking direction in the emission separation layer is different from that in Figure 13. For example, the concentration of the electron transport material in the emission separation layer IL becomes thinner toward the second electrode 61 side, and the degree of the concentration distribution is as follows: Light-emitting separation layer IL R <Emitting separation layer IL B <Emitting separation layer IL G The differences are as follows.

[0107] The light-emitting separation layer IL in the second embodiment can be formed so as to have different configurations depending on the display color of the pixel 10 by, for example, a mask vapor deposition method or a transfer method.

[0108] [Third embodiment] The third embodiment also relates to a display device, a method for manufacturing a display device, and an electronic device according to the present disclosure.

[0109] 1 and 3, the display device 1 can be read as the display device 3. The stacking order of the organic layers is the same as that in the first embodiment.

[0110] FIG. 15 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to the third embodiment.

[0111] In the display device 3 as well, the emission separation layer IL is formed so as to have a different configuration depending on the display color of the pixel 10. More specifically, the emission separation layer IL is formed using a hole transport material or an electron transport material whose configuration varies depending on the display color of the pixel.

[0112] In the display device 3, the light-emitting separation layer IL is formed using materials whose compositions vary depending on the display color of the pixel. More specifically, the light-emitting separation layer IL is formed by laminating a plurality of different materials. The light-emitting separation layer IL is formed by laminating at least two of a hole transport material, an electron transport material, and a positive and negative charge transport material. Here, the light-emitting separation layer IL will be described as being formed by laminating a hole transport material and an electron transport material.

[0113] The emission separation layer IL is formed so that the lamination ratio of different types of materials varies depending on the display color of the pixel. The emission separation layer IL is configured by laminating a layer IL1 made of a hole transport material located on the first electrode 31 side and a layer IL2 made of an electron transport material located on the second electrode 61 side. The film thickness ratio of the layer IL1 to the layer IL2 is Light-emitting separation layer IL R <Emitting separation layer IL B <Emitting separation layer IL G The thicknesses are preferably set to fall within the range of about 0 to 20 nanometers.

[0114] The light-emitting separation layer IL in the third embodiment can be formed so as to have different configurations depending on the display color of the pixel 10 by, for example, a mask vapor deposition method or a transfer method.

[0115] [Fourth embodiment] The fourth embodiment also relates to a display device, a method for manufacturing a display device, and an electronic device according to the present disclosure.

[0116] In the schematic plan view and schematic partial cross-sectional view of the display device 4 according to the fourth embodiment, the display device 1 in FIG. 1 and FIG.

[0117] In the fourth embodiment, a plurality of emission-emitting separation layers are disposed between the emission layers. More specifically, the emission-emitting separation layers are composed of a first emission-emitting separation layer disposed between the first and second emission layers, and a second emission-emitting separation layer disposed between the second and third emission layers.

[0118] In the display device 4, the light-emitting separation layer IL is also formed so as to have a different configuration depending on the display color of the pixel 10. More specifically, at least one of the first light-emitting separation layer and the second light-emitting separation layer is formed so as to have a different configuration depending on the display color of the pixel.

[0119] FIG. 16 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section of the display device according to the fourth embodiment.

[0120] 16, the first light-emitting separation layer IL1 is disposed between the red light-emitting layer 43 and the blue light-emitting layer 44, and the second light-emitting separation layer IL2 is disposed between the blue light-emitting layer 44 and the green light-emitting layer 45. The light-emitting separation layer IL is formed by combining the first light-emitting separation layer IL1 and the second light-emitting separation layer IL2.

[0121] The first light-emitting separation layer IL1 and the second light-emitting separation layer IL2 are formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material. Here, the first light-emitting separation layer IL1 is described as being made of a hole transport material, and the second light-emitting separation layer IL2 is described as being made of an electron transport material.

[0122] The film thickness ratio of the first light-emitting separation layer IL1 to the second light-emitting separation layer IL2 is Light-emitting separation layer IL R <Emitting separation layer IL B <Emitting separation layer IL G The thickness of each film is preferably set in the range of about 0 to 20 nanometers.

[0123] The first light-emitting separation layer IL1 and the second light-emitting separation layer IL2 in the fourth embodiment can be formed so as to have different configurations depending on the display color of the pixel 10 by, for example, a mask vapor deposition method or a transfer method.

[0124] [Fifth embodiment] The fifth embodiment also relates to a display device, a method for manufacturing a display device, and an electronic device according to the present disclosure.

[0125] 1 and 3, the display device 1 in the schematic plan view and schematic partial cross-sectional view of the display device 5 according to the fifth embodiment can be read as the display device 5. The stacking order of the organic layers is the same as that in the first embodiment.

[0126] FIG. 17 is a schematic plan view illustrating an arrangement of pixels in a display device according to the fifth embodiment.

[0127] The display device 5 is a display device configured to include white pixels in addition to red, blue, and green pixels. By adding the white pixels, it is possible to further improve the brightness.

[0128] FIG. 18 is a schematic cross-sectional view illustrating the stacking relationship between the first electrode, the organic layer, and the second electrode in the light-emitting section.

[0129] In the display device 5 as well, the light-emitting separation layer IL is formed so as to have a different configuration depending on the display color of the pixel 10. More specifically, the light-emitting separation layer IL is formed so as to have a different film thickness depending on the display color of the pixel. When the light-emitting separation layer IL is made of a hole transporting material, the relationship between the film thicknesses is as follows: Light-emitting separation layer IL R <Emitting separation layer IL W <Emitting separation layer IL B <Emitting separation layer IL G The film thickness of the light-emitting separation layer IL is preferably set in the range of about 0 to 20 nanometers, and it is desirable to set it so as to maintain the above-mentioned magnitude relationship within this film thickness range.

[0130] The display device 5 can be manufactured by the same manufacturing method as described in the first embodiment. When performing line vapor deposition, the heights of the partition walls may be different as shown in Fig. 10, or the widths of the first electrodes 31 corresponding to the light-emitting sections 50 may be different depending on the emitted color of the pixel as shown in Fig. 12. An example of the latter is shown in Fig. 19.

[0131] According to the display device of the present disclosure described above, the organic layer includes a plurality of different types of light-emitting layers and a light-emitting separation layer disposed between the light-emitting layers. The different types of light-emitting layers are stacked as a continuous common layer across each pixel, and the light-emitting separation layer is formed to have a different configuration depending on the display color of the pixel. Because a light-emitting separation layer with a different configuration is disposed for each pixel of each color, it is possible to set, for example, a red display pixel to emit strong red light, a blue display pixel to emit strong blue light, and a green display pixel to emit strong green light. Therefore, while maintaining the white mode, carriers previously used for emitting colors not involved in display can be concentrated to a certain extent in the light-emitting layer corresponding to the color to be displayed. This improves internal luminous efficiency.

[0132] [Examples of resonator structures applicable to each embodiment] The pixels used in the display device according to the present disclosure described above may be configured to have a resonator structure that resonates light generated in a light-emitting portion. The resonator structure will be described below with reference to the drawings.

[0133] (Resonator structure: 1st example) FIG. 20A is a schematic cross-sectional view for explaining a first example of a resonator structure.

[0134] In the first example, the first electrode 31 is formed to have a common film thickness in each light-emitting section 50. The same is true for the second electrode 61.

[0135] A reflector 71 is disposed below the first electrode 31 of the light-emitting section 50, with an optical adjustment layer 72 sandwiched therebetween. A resonator structure is formed between the reflector 71 and the second electrode 61, which resonates the light generated by the organic layer 40.

[0136] The reflector 71 is formed to have a common film thickness in each light-emitting section 50. The film thickness of the optical adjustment layer 72 varies depending on the color to be displayed by the pixel. R ,72 G ,72 B By having different film thicknesses, it is possible to set the optical distance that produces the optimum resonance for the wavelength of light corresponding to the color to be displayed.

[0137] In the example shown in the figure, the light emitting unit 50 R ,50 G ,50 B As described above, the film thickness of the optical adjustment layer 72 varies depending on the color to be displayed by the pixel. Therefore, the position of the upper surface of the second electrode 61 is aligned with the position of the upper surface of the light-emitting section 50. R ,50 G ,50 B It varies depending on the type of

[0138] The reflector 71 can be made of, for example, a metal such as aluminum (Al), silver (Ag), or copper (Cu), or an alloy containing any of these as a main component.

[0139] The optical adjustment layer 72 is made of silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N yThe optical adjustment layer 72 may be made of an inorganic insulating material such as acrylic resin or polyimide resin, or an organic resin material such as acrylic resin or polyimide resin. The optical adjustment layer 72 may be a single layer or a laminated film made of a plurality of these materials. The number of layers may vary depending on the type of light-emitting section 50.

[0140] The first electrode 31 can be formed using a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).

[0141] The second electrode 61 must function as a semi-transmissive reflective film. The second electrode 61 can be formed using magnesium (Mg) or silver (Ag), a magnesium-silver alloy (MgAg) containing these as main components, or an alloy containing an alkali metal or an alkaline earth metal.

[0142] (Resonator structure: 2nd example) FIG. 20B is a schematic cross-sectional view for explaining a second example of the resonator structure.

[0143] In the second example, the first electrode 31 and the second electrode 61 are also formed to have the same film thickness in each light-emitting section 50.

[0144] Also in the second example, a reflector 71 is disposed below the first electrode 31 of the light-emitting section 50, with an optical adjustment layer 72 sandwiched therebetween. A resonator structure that resonates light generated by the organic layer 40 is formed between the reflector 71 and the second electrode 61. As in the first example, the reflector 71 is formed to have the same film thickness in each light-emitting section 50, and the film thickness of the optical adjustment layer 72 differs depending on the color to be displayed by the pixel.

[0145] In the first example shown in FIG. 20A, the light-emitting unit 50 R ,50 G ,50 B The upper surfaces of the reflectors 71 are aligned with each other, and the upper surface of the second electrode 61 is positioned at a position R ,50 G ,50 B It differed depending on the type of

[0146] In contrast, in the second example shown in FIG. 20B, the upper surface of the second electrode 61 is R ,50 G ,50 B In order to align the upper surfaces of the second electrodes 61, the light-emitting sections 50 R ,50 G ,50 B The upper surface of the reflector 71 is R ,50 G ,50 B Therefore, the lower surface of the reflector 71 (in other words, the surface of the base 73 indicated by reference numeral 73 in the drawing) has a stepped shape according to the type of the light-emitting section 50.

[0147] The materials constituting the reflector 71, the optical adjustment layer 72, the first electrode 31, and the second electrode 61 are the same as those described in the first example, and therefore will not be described again.

[0148] (Resonator structure: 3rd example) FIG. 21A is a schematic cross-sectional view for explaining a third example of the resonator structure.

[0149] In the third example, the first electrode 31 and the second electrode 61 are also formed to have the same film thickness in each light-emitting section 50.

[0150] Also in the third example, a reflector 71 is disposed below the first electrode 31 of the light-emitting section 50, with an optical adjustment layer 72 sandwiched therebetween. A resonator structure that resonates the light generated by the organic layer 40 is formed between the reflector 71 and the second electrode 61. As in the first and second examples, the film thickness of the optical adjustment layer 72 varies depending on the color that the pixel is to display. As in the second example, the position of the upper surface of the second electrode 61 is located below the first electrode 31 of the light-emitting section 50. R ,50 G ,50 B are arranged to be aligned.

[0151] In the second example shown in FIG. 20B, the lower surface of the reflector 71 has a stepped shape according to the type of the light-emitting section 50 in order to align the upper surface of the second electrode 61.

[0152] In contrast, in the third example shown in FIG. 21A, the film thickness of the reflector 71 is R ,50 G ,50 B More specifically, the reflector 71 is set to have a different reflecting surface depending on the type of the reflector. R ,71 G ,71 B The film thickness is set so that the bottom surfaces of the

[0153] The materials constituting the reflector 71, the optical adjustment layer 72, the first electrode 31, and the second electrode 61 are the same as those described in the first example, and therefore will not be described again.

[0154] (Resonator structure: 4th example) FIG. 21B is a schematic cross-sectional view for explaining the fourth example of the resonator structure.

[0155] 20A, the first electrodes 31 and second electrodes 61 of each light-emitting section 50 are formed to have the same film thickness. A reflector 71 is disposed below the first electrode 31 of the light-emitting section 50 with an optical adjustment layer 72 sandwiched therebetween.

[0156] In contrast, in the fourth example shown in FIG. 21B, the optical adjustment layer 72 is omitted, and the film thickness of the first electrode 31 is set to the thickness of the light-emitting section 50 R ,50 G ,50 B The settings were different depending on the type of

[0157] The reflector 71 is formed to have a common thickness in each light-emitting section 50. The thickness of the first electrode 31 varies depending on the color to be displayed by the pixel. R ,31 G ,31 B By having different film thicknesses, it is possible to set the optical distance that produces the optimum resonance for the wavelength of light corresponding to the color to be displayed.

[0158] The materials constituting the reflector 71, the optical adjustment layer 72, the first electrode 31, and the second electrode 61 are the same as those described in the first example, and therefore will not be described again.

[0159] (Resonator structure: 5th example) FIG. 22A is a schematic cross-sectional view illustrating a fifth example of the resonator structure.

[0160] 20A, the first electrode 31 and the second electrode 61 are formed to have the same film thickness in each light-emitting section 50. A reflector 71 is disposed below the first electrode 31 of the light-emitting section 50 with an optical adjustment layer 72 sandwiched therebetween.

[0161] In contrast to this, in the fifth example shown in FIG. 22A, the optical adjustment layer 72 is omitted, and instead, an oxide film 74 is formed on the surface of the reflector 71. The thickness of the oxide film 74 is R ,50 G ,50 B The settings were different depending on the type of

[0162] The thickness of the oxide film 74 varies depending on the color that the pixel is to display. R ,74 G ,74 B By having different film thicknesses, it is possible to set the optical distance that produces the optimum resonance for the wavelength of light corresponding to the color to be displayed.

[0163] The oxide film 74 is a film obtained by oxidizing the surface of the reflector 71, and is made of, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. The oxide film 74 functions as an insulating film for adjusting the optical path length (optical distance) between the reflector 71 and the second electrode 61.

[0164] Light-emitting unit 50 R ,50 G ,50 B The oxide film 74, which has a thickness that varies depending on the type of oxide, can be formed, for example, as follows.

[0165] First, a container is filled with an electrolyte, and the substrate on which the reflector 71 is formed is immersed in the electrolyte. An electrode is also disposed so as to face the reflector 71.

[0166] Then, a positive voltage is applied to the reflector 71 with the electrode as a reference, and the reflector 71 is anodized. The thickness of the oxide film formed by anodization is proportional to the voltage value applied to the electrode. R , 71 G , 71 B Anodic oxidation is performed while a voltage according to the type of light-emitting section 50 is applied to each of the light-emitting sections 50. This allows oxide films 74 with different thicknesses to be formed all at once.

[0167] The materials constituting the reflector 71, the first electrode 31, and the second electrode 61 are the same as those described in the first example, and therefore will not be described again.

[0168] (Resonator structure: 6th example) FIG. 22B is a schematic cross-sectional view for explaining the sixth example of the resonator structure.

[0169] In the sixth example, the light-emitting section 50 is configured by laminating a first electrode 31, an organic layer 40, and a second electrode 61. However, in the sixth example, the first electrode 31 is formed so as to function both as an electrode and a reflector. The first electrode (also serving as a reflector) 31 is formed so as to function both as an electrode and a reflector. R ,50 G ,50 B The first electrode (also serving as a reflector) 31 is made of a material having an optical constant selected according to the type of color. By varying the phase shift caused by the first electrode (also serving as a reflector) 31, it is possible to set the optical distance that produces the optimum resonance for the wavelength of light according to the color to be displayed.

[0170] The first electrode (also serving as a reflector) 31 can be made of a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing these as a main component. R First electrode (also serving as a reflector) 31 Ris formed of copper (Cu), and the light emitting part 50 G First electrode (also serving as a reflector) 31 G and light-emitting unit 50 B First electrode (also serving as a reflector) 31 B The insulating film 11 may be made of aluminum.

[0171] The material constituting the second electrode 61 is the same as that described in the first example, and therefore a description thereof will be omitted.

[0172] (Resonator structure: 7th example) FIG. 23 is a schematic cross-sectional view illustrating a seventh example of the resonator structure.

[0173] The seventh example is basically the same as the light emitting unit 50 R ,50 G The sixth example is applied to the light-emitting unit 50 B This is a configuration in which the first example is applied. Even in this configuration, it is possible to set the optical distance that produces the optimum resonance for the wavelength of light corresponding to the color to be displayed.

[0174] Light-emitting unit 50 R ,50 G The first electrode (also serving as a reflector) 31 R ,31 G The can be made of a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing these as the main component.

[0175] Light-emitting unit 50 B Reflector 71 used in B , optical adjustment layer 72 B and the first electrode 31 B The materials constituting the second embodiment are the same as those explained in the first example, and therefore will not be explained further.

[0176] [Electronic equipment] The display device of the present disclosure described above can be used as a display unit (display unit) of electronic devices in various fields that displays a video signal input to the electronic device or a video signal generated within the electronic device as an image or video. For example, it can be used as a display unit of a television set, a digital still camera, a notebook personal computer, a portable terminal device such as a mobile phone, a video camera, a head-mounted display, etc.

[0177] The display device of the present disclosure also includes a sealed module. One example is a display module formed by attaching a counter section, such as transparent glass, to a pixel array section. The display module may also be provided with a circuit section or flexible printed circuit (FPC) for inputting and outputting signals from the outside to the pixel array section. Below, a digital still camera and a head-mounted display are given as specific examples of electronic devices that use the display device of the present disclosure. However, the specific examples given here are merely examples and are not intended to be limiting.

[0178] (Example 1) Figure 24 shows the appearance of a single-lens reflex digital still camera with an interchangeable lens, with Figure 24A showing a front view and Figure 24B showing a rear view. A single-lens reflex digital still camera with an interchangeable lens has, for example, an interchangeable taking lens unit (interchangeable lens) 412 on the right side of the front of a camera main body 411, and a grip 413 on the left side of the front for the photographer to hold.

[0179] A monitor 414 is provided in the approximate center of the back of the camera body 411. A viewfinder (eyepiece window) 415 is provided above the monitor 414. By looking through the viewfinder 415, the photographer can visually confirm the optical image of the subject guided by the photographing lens unit 412 and determine the composition.

[0180] In the lens-interchangeable single-lens reflex digital still camera having the above configuration, the display device of the present disclosure can be used as its viewfinder 415. That is, the lens-interchangeable single-lens reflex digital still camera according to this example is produced by using the display device of the present disclosure as its viewfinder 415.

[0181] (Example 2) 25 is an external view of a head-mounted display. The head-mounted display has, for example, ear hooks 512 on both sides of a glasses-shaped display unit 511 for wearing on the user's head. In this head-mounted display, the display device of the present disclosure can be used as the display unit 511. That is, the head-mounted display according to this example is produced by using the display device of the present disclosure as the display unit 511.

[0182] (Example 3) 26 is an external view of a see-through head mounted display 611. The see-through head mounted display 611 is made up of a main body 612, an arm 613, and an eyepiece tube 614.

[0183] The main body 612 is connected to the arm 613 and the eyeglasses 600. Specifically, an end of the long side of the main body 612 is coupled to the arm 613, and one side of the main body 612 is connected to the eyeglasses 600 via a connecting member. The main body 612 may also be worn directly on the head of the human body.

[0184] The main body 612 incorporates a control board for controlling the operation of the see-through head mounted display 611 and a display unit. The arm 613 connects the main body 612 to the lens barrel 614 and supports the lens barrel 614. Specifically, the arm 613 is coupled to an end of the main body 612 and an end of the lens barrel 614, respectively, and fixes the lens barrel 614. The arm 613 also incorporates a signal line for communicating data related to images provided from the main body 612 to the lens barrel 614.

[0185] The lens barrel 614 projects image light provided from the main body 612 via the arm 613 through an eyepiece lens toward the eyes of a user wearing the see-through head mounted display 611. In this see-through head mounted display 611, the display device of the present disclosure can be used for the display unit of the main body 612.

[0186] [others] The technology of the present disclosure can also be configured as follows.

[0187] [A1] Pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, The organic layer includes a plurality of different light-emitting layers and a light-emitting separation layer, The plurality of different types of light-emitting layers are laminated as a continuous common layer across each pixel, the light-emitting separation layer is disposed between two adjacent light-emitting layers and is formed to have a different configuration depending on the display color of the pixel; Display device. [A2] The light-emitting separation layer is formed so that its film thickness varies depending on the display color of the pixel. The display device according to [A1] above. [A3] the emission separation layer is formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material; The display device according to [A2] above. [A4] The light-emitting separation layer is formed using materials having different compositions depending on the display color of the pixel. The display device according to [A1] above. [A5] The light-emitting separation layer is formed by co-evaporating a plurality of different materials. The display device according to [A1] above. [A6] The light-emitting separation layer is formed so that the concentration relationship of a plurality of different materials varies depending on the display color of the pixel. The display device according to [A5] above. [A7] the emission separation layer is formed by co-depositing at least two of a hole transporting material, an electron transporting material, and a positive and negative charge transporting material; The display device according to [A5] or [A6] above. [A8] The light-emitting separation layer is formed by laminating a plurality of different materials. The display device according to [A1] above. [A9] The light-emitting separation layer is formed so that the lamination ratio of a plurality of different materials varies depending on the display color of the pixel. The display device according to [A8] above. [A10] the emission separation layer is formed by laminating at least two of a hole transporting material, an electron transporting material, and a positive and negative charge transporting material; The display device according to [A8] or [A9] above. [A11] the organic layer includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer, each of which is different from the other; The light-emitting layers are arranged as a continuous common layer across each pixel in the order of a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer, the light-emitting separation layer comprises a first light-emitting separation layer disposed between the first light-emitting layer and the second light-emitting layer, and a second light-emitting separation layer disposed between the second light-emitting layer and the third light-emitting layer; The display device according to [A1] above. [A12] At least one of the first light-emitting separation layer and the second light-emitting separation layer is formed to have a different configuration depending on the display color of the pixel. The display device according to [A11] above. [A13] the first light-emitting separation layer and the second light-emitting separation layer are formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material; The display device according to [A11] or [A12] above. [A14] the organic layer includes a red light-emitting layer, a blue light-emitting layer, and a green light-emitting layer; The light-emitting layers are laminated in the order of red light-emitting layer, blue light-emitting layer, and green light-emitting layer as a continuous common layer across each pixel. The display device according to any one of [A1] to [A13] above. [A15] A color filter corresponding to the color to be displayed is disposed on the upper surface of each pixel. The display device according to any one of [A1] to [A14] above. [A16] The pixel has a resonator structure that resonates light generated in the light-emitting portion. The display device according to any one of [A1] to [A15] above.

[0188] [B1] A method for manufacturing a display device in which pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, forming a first electrode corresponding to each pixel; a step of stacking a plurality of different types of light-emitting layers as a continuous common layer on the entire surface including the first electrode, and forming a light-emitting separation layer disposed between two adjacent light-emitting layers so as to have a different configuration depending on the display color of the pixel; having A method for manufacturing a display device. [B2] The method further includes forming a partition wall between adjacent first electrodes, a ratio between the height of a partition wall portion surrounding the first electrode and the width of the first electrode is set to vary depending on the luminescent color of the pixel, and the light-emitting layer is line-deposited with a predetermined film-forming width, and the light-emitting separation layer is line-deposited with a film-forming width wider than the film-depositing width of the light-emitting layer; A method for manufacturing the display device according to [B1] above.

[0189] [C1] Pixels including light-emitting sections each formed by laminating a first electrode, an organic layer, and a second electrode are arranged in a two-dimensional matrix, The organic layer includes a plurality of different light-emitting layers and a light-emitting separation layer, The plurality of different types of light-emitting layers are laminated as a continuous common layer across each pixel, the light-emitting separation layer is disposed between two adjacent light-emitting layers and is formed to have a different configuration depending on the display color of the pixel; An electronic device having a display device. [C2] The light-emitting separation layer is formed so that its film thickness varies depending on the display color of the pixel. The electronic device according to [C1] above. [C3] the emission separation layer is formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material; The electronic device according to [C2] above. [C4] The light-emitting separation layer is formed using materials having different compositions depending on the display color of the pixel. The electronic device according to [C1] above. [C5] The light-emitting separation layer is formed by co-evaporating a plurality of different materials. The electronic device according to [C1] above. [C6] The light-emitting separation layer is formed so that the concentration relationship of a plurality of different materials varies depending on the display color of the pixel. The electronic device according to [C5] above. [C7] the emission separation layer is formed by co-depositing at least two of a hole transporting material, an electron transporting material, and a positive and negative charge transporting material; The electronic device according to [C5] or [C6] above. [C8] The light-emitting separation layer is formed by laminating a plurality of different materials. The electronic device according to [C1] above. [C9] The light-emitting separation layer is formed so that the lamination ratio of a plurality of different materials varies depending on the display color of the pixel. The electronic device according to [C8] above. [C10] the emission separation layer is formed by laminating at least two of a hole transporting material, an electron transporting material, and a positive and negative charge transporting material; The electronic device according to [C8] or [C9] above. [C11] the organic layer includes a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer, each of which is different from the other; The light-emitting layers are arranged as a continuous common layer across each pixel in the order of a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer, the light-emitting separation layer comprises a first light-emitting separation layer disposed between the first light-emitting layer and the second light-emitting layer, and a second light-emitting separation layer disposed between the second light-emitting layer and the third light-emitting layer; The electronic device according to [C1] above. [C12] At least one of the first light-emitting separation layer and the second light-emitting separation layer is formed to have a different configuration depending on the display color of the pixel. The electronic device according to [C11] above. [C13] the first light-emitting separation layer and the second light-emitting separation layer are formed using at least one of a hole transport material, an electron transport material, and a positive and negative charge transport material; The electronic device according to [C11] or [C12] above. [C14] the organic layer includes a red light-emitting layer, a blue light-emitting layer, and a green light-emitting layer; The light-emitting layers are laminated in the order of red light-emitting layer, blue light-emitting layer, and green light-emitting layer as a continuous common layer across each pixel. The electronic device according to any one of [C1] to [C13] above. [C15] A color filter corresponding to the color to be displayed is disposed on the upper surface of each pixel. The electronic device according to any one of [C1] to [C14] above. [C16] The pixel has a resonator structure that resonates light generated in the light-emitting portion. The electronic device according to any one of [C1] to [C15] above. [Explanation of symbols]

[0190] 1. Display device, 10. Pixel, 11. Display area, 20. Substrate, 21. Base material, 22. Gate electrode, 23. Gate insulating film, 24. Semiconductor material layer, 25. Planarization film, 26. Source / drain electrode, 27. Planarization film, 28. Contact plug, 31, 31 R ,31 G ,31 B ...First electrode, 32...Partition part, 40,40 R ,40 G ,40 B 4. Organic layer, 41. Hole injection layer, 42. Hole transport layer, 43. First light-emitting layer (red light-emitting layer), 44. Second light-emitting layer (blue light-emitting layer), 45. Third light-emitting layer (green light-emitting layer), 46. Electron transport layer, 50. Light-emitting portion, 61. Second electrode, 62. Protective film, 63. Color filter, 64. Front substrate, 71, 71 R ,71 G ,71 B ...reflector, 72 R ,72 G ,72 B Optical adjustment layer, 73 Underlying surface, 74 R ,74 G ,74 B···Oxide film, IL··Emission separation layer, 100···Power supply unit, 101···Scanning unit, 102···Data driver, 411···Camera main body, 412···Photographing lens unit, 413···Grip unit, 414···Monitor, 415···Viewfinder, 511···Eyeglass-shaped display unit, 512···Ear hook unit, 600···Eyeglasses (eyewear), 611···See-through head-mounted display, 612···Main body, 613···Arm, 614···Lens barrel

Claims

1. a plurality of pixels including a first pixel, a second pixel, and a third pixel, arranged in a two-dimensional matrix; a partition wall portion disposed between the pixels to separate the pixels from one another; a plurality of color filters including a first color filter arranged at a position corresponding to the first pixel, a second color filter arranged at a position corresponding to the second pixel, and a third color filter arranged at a position corresponding to the third pixel; Equipped with the first color light after passing through the first color filter, the second color light after passing through the second color filter, and the third color light after passing through the third color filter are different from each other; Each of the pixels is a first electrode on the substrate; a first light-emitting layer on the first electrode; a first light-emitting separation layer located on the first light-emitting layer and including at least one of an electron transport material and a hole transport material; a second light-emitting layer on the first light-emitting separation layer; a second light-emitting separation layer located on the second light-emitting layer and including at least one of an electron transport material and a hole transport material; a third light-emitting layer on the second light-emitting separation layer; a second electrode on the third light-emitting layer; a reflector located on the substrate between the substrate and the first electrode; an optical adjustment layer located between the reflector and the first electrode; Equipped with In at least one pixel among the first pixel, the second pixel, and the third pixel, the first light-emitting separation layer and the second light-emitting separation layer have different thicknesses, the optical adjustment layers corresponding to the first pixel, the second pixel, and the third pixel have different film thicknesses; the first pixel and the second pixel are adjacent to each other in a column direction of the two-dimensional matrix, the second pixel and the third pixel are adjacent to each other in a row direction of the two-dimensional matrix, an area of ​​the light-emitting portion of the first pixel, an area of ​​the light-emitting portion of the second pixel, and an area of ​​the light-emitting portion of the third pixel are different from one another; the first pixel, the second pixel, and the third pixel are pixels having different display colors from one another, the pixels having different display colors include a red pixel having red as a display color, a green pixel having green as a display color, and a blue pixel having blue as a display color; the first pixel, the second pixel, and the third pixel have different emission intensities of display colors; Display device.

2. a plurality of pixels including a first pixel, a second pixel, and a third pixel, arranged in a two-dimensional matrix; a partition wall portion disposed between the pixels to separate the pixels from one another; a plurality of color filters including a first color filter arranged at a position corresponding to the first pixel, a second color filter arranged at a position corresponding to the second pixel, and a third color filter arranged at a position corresponding to the third pixel; Equipped with the first color light after passing through the first color filter, the second color light after passing through the second color filter, and the third color light after passing through the third color filter are different from each other; Each of the pixels is a first electrode on the substrate; a first light-emitting layer on the first electrode; a first light-emitting separation layer located on the first light-emitting layer and including at least one of an electron transport material and a hole transport material; a second light-emitting layer on the first light-emitting separation layer; a second light-emitting separation layer located on the second light-emitting layer and including at least one of an electron transport material and a hole transport material; a third light-emitting layer on the second light-emitting separation layer; a second electrode on the third light-emitting layer; a reflector located on the substrate between the substrate and the first electrode; an optical adjustment layer located between the reflector and the first electrode; Equipped with In at least one pixel among the first pixel, the second pixel, and the third pixel, the first light-emitting separation layer and the second light-emitting separation layer have different thicknesses, the optical adjustment layers corresponding to the first pixel, the second pixel, and the third pixel have different film thicknesses; the first pixel and the second pixel are adjacent to each other in a column direction of the two-dimensional matrix, the second pixel and the third pixel are adjacent to each other in a row direction of the two-dimensional matrix, a width of the first electrode corresponding to the light-emitting portion of the first pixel, a width of the first electrode corresponding to the light-emitting portion of the second pixel, and a width of the first electrode corresponding to the light-emitting portion of the third pixel are different from one another in the row direction; the first pixel, the second pixel, and the third pixel are pixels having different display colors from one another, the pixels having different display colors include a red pixel having red as a display color, a green pixel having green as a display color, and a blue pixel having blue as a display color; the first pixel, the second pixel, and the third pixel have different emission intensities of display colors; Display device.

3. the column direction corresponds to the extension direction of a data line to which a signal voltage corresponding to the luminance of a corresponding image is supplied; The row direction corresponds to an extension direction of a scanning line to which a scanning signal for scanning the plurality of pixels is supplied. The display device according to claim 1 or 2.

4. the positions of the upper surfaces of the reflectors in the height direction of the first pixel, the second pixel, and the third pixel are aligned with each other; The display device according to any one of claims 1 to 3.

5. a plurality of light emitting sections, including a first light emitting section, a second light emitting section, and a third light emitting section, which are arranged in a two-dimensional matrix and are each surrounded and partitioned by a partition section; a plurality of color filters including a first color filter arranged at a position corresponding to the first light-emitting unit, a second color filter arranged at a position corresponding to the second light-emitting unit, and a third color filter arranged at a position corresponding to the third light-emitting unit; A display device comprising: the first color light after passing through the first color filter, the second color light after passing through the second color filter, and the third color light after passing through the third color filter are different from each other; Each of the light emitting units is A substrate; a first light-emitting layer on the substrate; a first light-emitting separation layer located on the first light-emitting layer and including at least one of an electron transport material and a hole transport material; a second light-emitting layer on the first light-emitting separation layer; a second light-emitting separation layer located on the second light-emitting layer and including at least one of an electron transport material and a hole transport material; a third light-emitting layer on the second light-emitting separation layer; Equipped with The display device includes: a reflector corresponding to each of the light-emitting portions and positioned on the substrate between the substrate and the first light-emitting layer; an optical adjustment layer corresponding to each of the light emitting portions and positioned between the reflector and the first light emitting layer; Equipped with In at least one of the first light-emitting section, the second light-emitting section, and the third light-emitting section, the first light-emitting separation layer and the second light-emitting separation layer have different thicknesses, at least two of the optical adjustment layers corresponding to the first light-emitting section, the second light-emitting section, and the third light-emitting section have different film thicknesses; the first light-emitting unit and the second light-emitting unit are adjacent to each other in a column direction of the two-dimensional matrix, the second light-emitting unit and the third light-emitting unit are adjacent to each other in a row direction of the two-dimensional matrix, an area of ​​the first light-emitting portion, an area of ​​the second light-emitting portion, and an area of ​​the third light-emitting portion are different from one another; the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are light-emitting units having different light-emitting colors from one another, the light-emitting units having different light-emitting colors include a red light-emitting unit having red as its light-emitting color, a green light-emitting unit having green as its light-emitting color, and a blue light-emitting unit having blue as its light-emitting color, the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit have different light emission intensities of the emitted colors; Display device.

6. the plurality of light-emitting units further include a fourth light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are adjacent to each other in the column direction, the first light-emitting unit and the fourth light-emitting unit are adjacent to each other in the row direction, an area of ​​the first light-emitting portion, an area of ​​the second light-emitting portion, an area of ​​the third light-emitting portion, and an area of ​​the fourth light-emitting portion are different from one another; The display device according to claim 5 .

7. a plurality of light emitting sections, including a first light emitting section, a second light emitting section, and a third light emitting section, which are arranged in a two-dimensional matrix and are each surrounded and partitioned by a partition section; a plurality of color filters including a first color filter arranged at a position corresponding to the first light-emitting unit, a second color filter arranged at a position corresponding to the second light-emitting unit, and a third color filter arranged at a position corresponding to the third light-emitting unit; A display device comprising: the first color light after passing through the first color filter, the second color light after passing through the second color filter, and the third color light after passing through the third color filter are different from each other; Each of the light emitting units is A substrate; a first light-emitting layer on the substrate; a first light-emitting separation layer located on the first light-emitting layer and including at least one of an electron transport material and a hole transport material; a second light-emitting layer on the first light-emitting separation layer; a second light-emitting separation layer located on the second light-emitting layer and including at least one of an electron transport material and a hole transport material; a third light-emitting layer on the second light-emitting separation layer; Equipped with The display device includes: a reflector corresponding to each of the light-emitting portions and positioned on the substrate between the substrate and the first light-emitting layer; an optical adjustment layer corresponding to each of the light emitting portions and positioned between the reflector and the first light emitting layer; Equipped with In at least one of the first light-emitting section, the second light-emitting section, and the third light-emitting section, the first light-emitting separation layer and the second light-emitting separation layer have different thicknesses, at least two of the optical adjustment layers corresponding to the first light-emitting section, the second light-emitting section, and the third light-emitting section have different film thicknesses; the first light-emitting unit and the second light-emitting unit are adjacent to each other in a column direction of the two-dimensional matrix, the second light-emitting unit and the third light-emitting unit are adjacent to each other in a row direction of the two-dimensional matrix, a width of the first light-emitting section, a width of the second light-emitting section, and a width of the third light-emitting section are different from one another in the row direction; the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are light-emitting units having different light-emitting colors from one another, the light-emitting units having different light-emitting colors include a red light-emitting unit having red as its light-emitting color, a green light-emitting unit having green as its light-emitting color, and a blue light-emitting unit having blue as its light-emitting color, the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit have different light emission intensities of the emitted colors; Display device.

8. the plurality of light-emitting units further include a fourth light-emitting unit, the third light-emitting unit and the fourth light-emitting unit are adjacent to each other in the column direction, the first light-emitting unit and the fourth light-emitting unit are adjacent to each other in the row direction, a width of the first light-emitting section, a width of the second light-emitting section, a width of the third light-emitting section, and a width of the fourth light-emitting section are different from one another in the row direction; The display device according to claim 7 .

9. The thickness of the first light-emitting separation layer is 20 nm (nanometers) or less; The display device according to any one of claims 1 to 8.

10. The second light-emitting separation layer has a thickness of 20 nm or less. The display device according to any one of claims 1 to 9.

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