Display device and electronic apparatus

Abstract

This display device comprises: a pixel region provided with a plurality of pixels; a contact region adjacent to the pixel region and provided with a contact part; and wiring extending from the pixel region to the contact region. Each of the plurality of pixels includes a light emission layer containing an organic material, and an anode electrode and a cathode electrode that are located on opposite sides across the light emission layer. The wiring connects the anode electrode and the contact part. In the contact region, the wiring includes a recess the bottom of which is in contact with the contact part.

Description

Display devices and electronic devices

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

[0002] For example, Patent Document 1 discloses a display device in which an anode electrode, a light-emitting layer containing an organic material, and a cathode electrode are stacked in this order in a pixel region (display region) where a plurality of pixels are provided.

[0003] Japanese Patent Application Laid-Open No. 2020-155280

[0004] A contact portion for a cathode electrode may be provided in a contact region adjacent to a pixel region. If the width of the contact region can be reduced, it can contribute to miniaturization of the device.

[0005] One aspect of the present disclosure is miniaturization of the device.

[0006] A display device according to one aspect of the present disclosure comprises a pixel region in which a plurality of pixels are provided, a contact region adjacent to the pixel region in which a contact portion is provided, and wiring extending from the pixel region to the contact region, wherein each of the plurality of pixels includes a light-emitting layer containing an organic material, and an anode electrode and a cathode electrode located on opposite sides of the light-emitting layer, the wiring connecting the anode electrode and the contact portion, and in the contact region, the wiring includes a recess whose bottom contacts the contact portion.

[0007] An electronic device according to one aspect of the present disclosure is an electronic device equipped with a display device, the display device including a pixel region in which a plurality of pixels are provided, a contact region adjacent to the pixel region and in which a contact portion is provided, and wiring extending from the pixel region to the contact region, each of the plurality of pixels including an emitting layer containing an organic material, and an anode electrode and a cathode electrode located on opposite sides of the emitting layer, the wiring connecting the anode electrode and the contact portion, and in the contact region, the wiring including a recess whose bottom contacts the contact portion.

[0008] 1 is a diagram showing a schematic configuration of a display device 10 according to a first embodiment; FIG. 1 is a diagram showing an example of a schematic configuration of the display device 10; FIG. 1 is a diagram showing an example of a schematic configuration of the display device 10; FIG. 2 is a diagram showing an example of a plurality of recesses 60 when viewed in plan; FIG. 2 is a diagram showing a comparative example; FIG. 3 is a diagram showing a comparative example; FIG. 4 is a diagram showing a comparative example; FIG. 5 is a diagram showing an example of a method for manufacturing the display device 10; FIG. 6 is a diagram showing an example of a method for manufacturing the display device 10; FIG. 7 is a diagram showing an example of a method for manufacturing the display device 10; FIG. 8 is a diagram showing an example of a method for manufacturing the display device 10; FIG. 9 is a diagram showing an example of a method for manufacturing the display device 10; 10 is a diagram illustrating an example of a manufacturing method for a display device 10 according to a second embodiment. FIG. 11 is a conceptual diagram (part 1) illustrating the relationship between a normal LN passing through the center of the light-emitting section, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selection section. FIG. 12 is a conceptual diagram (part 2) illustrating the relationship between a normal LN passing through the center of the light-emitting section, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selection section. FIG. 13 is a conceptual diagram (part 4) illustrating the relationship between a normal LN passing through the center of the light-emitting section, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selection section.1 is a conceptual diagram (part 5) for explaining the relationship between a normal LN passing through the center of the light-emitting section, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selecting section. FIG. 1 is a conceptual diagram (part 6) for explaining the relationship between a normal LN passing through the center of the light-emitting section, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selecting section. FIG. 1 is a conceptual diagram (part 7) for explaining the relationship between a normal LN passing through the center of the light-emitting section, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selecting section. FIG. 1 is a schematic cross-sectional view for explaining a first example of a resonator structure. FIG. 2 is a schematic cross-sectional view for explaining a second example of a resonator structure. FIG. 3 is a schematic cross-sectional view for explaining a third example of a resonator structure. FIG. 4 is a schematic cross-sectional view for explaining a fourth example of a resonator structure. FIG. 5 is a schematic cross-sectional view for explaining a fifth example of a resonator structure. FIG. 6 is a schematic cross-sectional view for explaining a sixth example of a resonator structure. FIG. 7 is a schematic cross-sectional view for explaining a seventh example of a resonator structure. 1 is a rear view of the contact region 12; FIG. 2 is an external view of a head mounted display; FIG. 3 is an external view of a see-through head mounted display; FIG. 4 is an external view of a television device; FIG. 5 is an external view of a smartphone; FIG. 6 is a diagram (part 1) showing the internal configuration of a car; FIG. 7 is a diagram (part 2) showing the internal configuration of a car, showing an example of a schematic configuration of the contact region 12; FIG. 8 is a diagram of a modified example; FIG. 9 is a diagram of a modified example; FIG. 10 is a diagram of an example of a manufacturing method; FIG. 11 is a diagram of an example of a manufacturing method; FIG. 12 is a diagram of an example of a manufacturing method; FIG. 13 is a diagram of an example of a manufacturing method; FIG. 14 is a diagram of an example of an opening processing; FIG. 15 is a diagram of an example of an opening processing; FIG. 16 is a diagram of an example of a planar layout of the contact region 12;

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the following embodiments, the same elements are designated by the same reference numerals, and redundant description will be omitted.

[0010] The present disclosure will be described in the following order: 1. First embodiment 2. Second embodiment 3. Modification 4. Application example 5. Summary 6. Modification

[0011] 1. First Embodiment FIG. 1 is a diagram showing a schematic configuration of a display device 10 according to a first embodiment. The configuration of the display device 10 when viewed in a plan view (front view) is shown schematically. XYZ coordinates are also shown. The X-axis direction and Y-axis direction (XY plane direction) correspond to the display surface direction of the display device 10. The Z-axis direction corresponds to the thickness direction of the display device 10. For example, the display device 10 outputs light (also called display light) that constitutes a display image in the Z-axis direction. The term "image" may be interpreted to include a video, and these terms may be interpreted appropriately as long as there is no contradiction.

[0012] The display device 10 includes a pixel region 11 and a contact region 12 .

[0013] A plurality of pixels 1 are provided in the pixel region 11. The pixels 1 are display pixels and output light of a corresponding color. Examples of the colors are red (R), green (G), blue (B), etc. The pixels 1 can also be called sub-pixels.

[0014] A plurality of pixels 1 are arranged in a two-dimensional array in a pixel region 11. The pixel region 11 can also be called a display region. When viewed in a plan view (when viewed in the Z-axis direction), the pixel region 11 has a rectangular shape. The row direction of the array (direction of pixel rows) corresponds to the X-axis direction. The column direction of the array (direction of pixel columns) corresponds to the Y-axis direction.

[0015] The contact region 12 is provided adjacent to the pixel region 11. In this example, the contact region 12 extends along the outer periphery of the pixel region 11 so as to surround the pixel region 11. The contact region 12 has four regions adjacent to the sides (edges) of the pixel region 11. In order to make it possible to distinguish between the regions, they are referred to as region 121, region 122, region 123, and region 124 in the drawings.

[0016] Regions 121 and 122 are located on opposite sides of pixel region 11 in the X-axis direction and extend with their longitudinal direction in the Y-axis direction. Regions 123 and 124 are located on opposite sides of pixel region 11 in the Y-axis direction and extend in the X-axis direction.

[0017] Elements other than the pixel region 11 and the contact region 12 may also be included in the display device 10. An example of the other elements is a terminal for providing electrical connection to the outside of the display device 10. For example, a circuit (drive circuit) for driving the multiple pixels 1 in the pixel region 11 is connected to the terminal. Note that such a drive circuit may also be included in the display device 10 as a component of the display device 10.

[0018] 2 and 3 are diagrams showing an example of a schematic configuration of the display device 10. Fig. 2 shows a schematic cross section of a portion of the pixel region 11 and the contact region 12 when viewed from the side (when viewed in the X-axis direction or the Y-axis direction). Fig. 3 shows an enlarged view of a portion of Fig. 2.

[0019] The display device 10 includes a substrate 2, a light-emitting section 3, a contact section 4, a protective material 5, a protective material 5A, and wiring 6. Of these, the substrate 2, the protective material 5, the protective material 5A, and the wiring 6 are provided throughout the pixel region 11 and the contact region 12. In this example, the light-emitting section 3 is provided in the pixel region 11. The contact section 4 is provided in the contact region 12.

[0020] The substrate 2 is, for example, a semiconductor substrate, extends in the X-axis direction and the Y-axis direction (XY plane direction) as surface directions, and has a thickness in the Z-axis direction. Each element of the display device 10 is provided within or on the substrate 2. Wiring 20 is illustrated as an element provided within the substrate 2, with reference numerals given to it. Although not shown in the figure, circuit elements such as transistors for controlling the light emission of the pixels 1 may also be provided.

[0021] The light-emitting section 3 is a portion of the pixel 1 that emits light, and in this example is provided on the substrate 2. Each of the multiple pixels 1 includes the light-emitting section 3. The light emitted by the light-emitting section 3 may be display light of the pixel 1 (e.g., red light, green light, or blue light), or may be white light. The light from the light-emitting section 3 is extracted via, for example, a color filter, a lens (on-chip lens), or the like (not shown).

[0022] The light-emitting section 3 is configured to include an OLED (organic light-emitting diode). Specifically, as shown in Fig. 3, the light-emitting section 3 includes a light-emitting layer 30 and a pair of electrodes positioned on opposite sides of the light-emitting layer 30. Note that the term "layer" may be interpreted to include a "film," and these terms may be interpreted interchangeably as appropriate within a consistent range.

[0023] The light-emitting layer 30 is an organic layer containing an organic material. Various known organic materials for achieving OLED functionality may be used. In the example shown in Figures 2 and 3, the light-emitting layers 30 of the multiple pixels 1 are separated from each other. In the XY plane direction, the light-emitting layers 30 of adjacent pixels 1 are arranged with a gap between them.

[0024] One of the pair of electrodes is referred to as an anode electrode 31 and illustrated. The other electrode is referred to as a cathode electrode 32 and illustrated. These names are used to distinguish between the two types of electrodes, and the terms anode electrode and cathode electrode may be interpreted interchangeably as appropriate within the scope of the disclosed technology (without contradiction). Furthermore, one and the other of the anode electrode and cathode electrode may simply be referred to as a first electrode and a second electrode, etc.

[0025] The anode electrode 31 and the cathode electrode 32 are located on opposite sides of the light-emitting layer 30. The anode electrode 31, the light-emitting layer 30, and the cathode electrode 32 are provided in this order in the positive direction of the Z axis. An example of the electrode material is IZO. However, this is not limitative and various known materials may be used. The material of the anode electrode 31 and the material of the cathode electrode 32 may be the same or different.

[0026] The anode electrodes 31 of the plurality of pixels 1 are separated from one another. The anode electrodes 31 of adjacent pixels 1 are spaced apart in the XY plane. The voltage of the anode electrodes 31, i.e., the voltage applied to the light-emitting layer 30, can be controlled individually for each pixel 1.

[0027] 2 and 3, the cathode electrodes 32 of the pixels 1 are also separated from one another, similar to the light-emitting layers 30. The cathode electrodes 32 of adjacent pixels 1 in the XY plane direction are spaced apart from one another. However, as will be described later, these cathode electrodes 32 are commonly connected by a wiring 6.

[0028] The contact portion 4 is a contact portion for the cathode electrode 32 of the light emitting portion 3, and in this example, is provided on the substrate 2. The material of the contact portion 4 may be the same as the material of the cathode electrode 32.

[0029] The protective material 5 and the protective material 5A are provided to protect other elements. In this example, the protective material 5 is a protective layer provided to cover the substrate 2, the light emitting portion 3, and the contact portion 4. The protective material 5A is a protective layer provided within the protective material 5. An example of a material for the protective material 5 is SiN. An example of a material for the protective material 5A is AlO. The materials are not limited to these, and various known materials that can be used as protective layers may be used.

[0030] 3 , the protective material 5 includes a first portion 51 and a second portion 52. The first portion 51 is provided so as to cover the substrate 2, the light-emitting portion 3, and the contact portion 4, except for a portion of the cathode electrode 32 of the light-emitting portion 3 and a portion of the contact portion 4. Wiring 6 is provided on the first portion 51, as well as on a portion of the cathode electrode 32 of the light-emitting portion 3 and a portion of the contact portion 4. The second portion 52 is provided so as to cover the wiring 6.

[0031] The wiring 6 extends from the pixel region 11 to the contact region 12. Specifically, the wiring 6 connects the cathode electrode 32 of each of the multiple pixels 1 in the pixel region 11 to the contact portion 4 in the contact region 12. The material of the wiring 6 may be the same as the material of the cathode electrode 32 (IZO is one example). The cathode electrode 32 can be connected to the contact portion 4 in the contact region 12 by the wiring 6 having the same electrical properties as the cathode electrode 32.

[0032] Other examples of materials for the wiring 6 include W, Al, Cu, TiN, TiO, tin oxide, aluminum zinc oxide, gallium zinc oxide, indium zinc oxide, IGZO, ITZO, CuI, InSbO4, ZnMgO, CuInO2, MgIn2O4, CdO, and ZnSnO3. An example of tin oxide is SnO2, and an example of an added dopant is ITO. An example of aluminum zinc oxide is AZO, in which Al is added as a dopant to ZnO. An example of gallium zinc oxide is GZO, in which Ga is added as a dopant to ZnO. An example of indium zinc oxide is IZO, in which In is added as a dopant to ZnO.

[0033] The wiring 6 includes a recess 60 for making contact with the cathode electrode 32 and the contact portion 4. As shown in FIG. 3 , the recess 60 includes a bottom 61 and a sidewall 62. The bottom 61 of the recess 60 is located closest to the substrate 2 (negative Z-axis direction side) in the wiring 6. The sidewall 62 of the recess 60 extends upward (positive Z-axis direction) from the edge of the bottom 61. The recess 60 is formed as, for example, a via. Note that the recess 60 can also be called a protrusion that protrudes downward (in the Z-axis direction). To the extent that there is no contradiction, the terms "recess" and "protrusion" may be interpreted interchangeably.

[0034] In the pixel region 11, the wiring 6 includes a recess 60 whose bottom 61 contacts the cathode electrode 32. As described above, in the example shown in Figures 2 and 3, the cathode electrodes 32 of the multiple pixels 1 are separated. In the pixel region 11, the wiring 6 includes a plurality of recesses 60 whose bottom 61 contacts the cathode electrode 32 of the corresponding pixel 1.

[0035] 2 and 3 , the wiring 6 includes one or more recesses 60, each having a bottom 61 in contact with the contact portion 4. The wiring 6 contacts the cathode electrodes 32 of the pixels 1 via the recesses 60 in the pixel region 11, and contacts the contact portion 4 via the recesses 60 in the contact region 12. As a result, the cathode electrodes 32 of the pixels 1 in the pixel region 11 are connected to the contact portions 4 in the contact region 12 via the wiring 6.

[0036] The greater the number of recesses 60 provided in the contact region 12, the smaller the resistance (contact resistance) between the cathode electrode 32 connected via the wiring 6 and the contact portion 4. This makes it possible to stabilize the connection of the cathode electrode 32 to the contact portion 4.

[0037] When viewed from the side (when viewed in the X-axis direction or the Y-axis direction), the recess 60 in the pixel region 11 and the recess 60 in the contact region 12 may have the same vertical structure. The vertical structure is defined, for example, by a bottom 61 of the recess 60, a sidewall 62 of the recess 60, and a protective material 5 (part of the second portion 52) provided so as to fill the recess 60. As will be described later, when processes for obtaining the recess 60 in the pixel region 11 and the recess 60 in the contact region 12 are performed simultaneously, the vertical structures of these recesses 60 will be the same.

[0038] When the display device 10 is viewed in a plan view (when viewed in the negative Z-axis direction), a plurality of recesses 60 are arranged at intervals throughout the pixel region 11 and the contact region 12. The arrangement of the recesses 60 can also be one of the features of the display device 10. This will be described with reference to FIG. 4 as well.

[0039] 4 is a diagram showing an example of a plurality of recesses 60 in a plan view. In this example, the pattern of the plurality of recesses 60 in the pixel region 11 and the pattern of the plurality of recesses 60 in the contact region 12 are the same. Note that "same" here may be interpreted as meaning "substantially the same." For example, even if the patterns are the same in terms of design but there are differences due to manufacturing variations or the like, those patterns can still be said to be substantially the same.

[0040] An example of the arrangement pattern is the area ratio. When viewed in a plan view (when viewed in the negative Z-axis direction), the area ratio of the entire plurality of recesses 60 in the pixel region 11 to the pixel region 11 may be substantially the same as the area ratio of the entire plurality of recesses 60 in the contact region 12 to the contact region 12. Another example of the arrangement pattern is the arrangement interval. When viewed in a plan view, the arrangement interval (the distance between adjacent recesses 60) of the entire plurality of recesses 60 in the pixel region 11 may be substantially the same as the arrangement interval of the entire plurality of recesses 60 in the contact region 12. Making the pattern of the recesses 60 uniform increases the possibility of suppressing changes in processing rate and suppressing film peeling.

[0041] 4, the recess 60 has a circular shape when viewed from above. However, the shape of the recess 60 is not limited to this. Some examples of other shapes are shown in FIGS. 15 and 16, which will be described later.

[0042] According to the display device 10 having the configuration described above, it is possible to reduce the width of the contact region 12, i.e., the length in the short direction of the contact region 12. By shrinking the contact region 12, it is possible to reduce the size of the display device 10. A comparative example will also be used for explanation.

[0043] 5 to 7 are diagrams illustrating a comparative example. The display device according to the comparative example is illustrated and referred to as display device 10E. The contact region of display device 10E is illustrated and referred to as contact region 12E. The contact portion provided in contact region 12E is illustrated and referred to as contact portion 4E. Furthermore, the cathode electrode of display device 10E is illustrated and referred to as cathode electrode 32E.

[0044] In the display device 10E, the light-emitting layer 30 and the cathode electrode 32E are provided in common across a plurality of pixels 1. A protective material 5 is provided so as to cover the cathode electrode 32E. Note that Fig. 5 also shows a separator 7 provided between adjacent pixels 1. The separator 7 has at least one function of optical separation (e.g., light blocking) and electrical separation. Various known materials may be used.

[0045] In the display device 10E, the light-emitting layer 30 extends from the pixel region 11 to a part of the contact region 12E. The part of the light-emitting layer 30 located in the contact region 12E is illustrated and referred to as an extension portion 30E. The reason for the formation of the extension portion 30E will be described with reference to FIG. 6 .

[0046] 6 is a schematic diagram illustrating a manufacturing process of a comparative example of an emitting layer. A film is formed by a deposition gas G1 while the pixel region 11 and the contact region 12E, of which the contact region 12E, are covered by a shadow mask M1. The deposition gas G1 flows into the gap between the shadow mask M1 and the substrate 2, and a portion of the contact region 12E is also deposited. This results in an extension 30E.

[0047] 5 , the cathode electrode 32E of the display device 10E contacts the contact portion 4E at a position outside the extension portion 30E of the light-emitting layer 30 (a position in the contact region 12E opposite the pixel region 11). The cathode electrode 32E extends beyond the extension portion 30E, and the width of the contact region 12E increases accordingly. This increases the size of the display device 10E.

[0048] FIG. 7 shows the display device 10E in a plan view (viewed in the negative Z-axis direction). The width of the contact region 12E of the display device 10E is significantly larger than the width of the contact region 12 of the display device 10 according to the first embodiment described above ( FIG. 1 ). For example, the width of the contact region 12E of the display device 10E according to the comparative example is approximately 1 mm. In contrast, the width of the contact region 12 of the display device 10 according to the first embodiment is significantly smaller than 1 mm, for example, 100 μm or less. The contact region 12 of the display device 10 may have a certain width (e.g., 100 μm), which allows a sufficient number of recesses 60 to be provided in the contact region 12 to stabilize the contact resistance value while taking into account the accuracy (dimensional variations, misalignment, etc.) of the recesses 60 formed in the manufacturing process described below.

[0049] 8 to 12 are diagrams showing an example of a method for manufacturing the display device 10. Several processes (steps) for manufacturing the display device 10 are shown schematically. Each element on the substrate 2 is provided (formed) by, for example, film formation.

[0050] As shown in Fig. 8, the light emitting section 3 and the contact section 4 are provided on the substrate 2, and a material for the protective material 5 is provided to cover them. The material for the protective material 5 is referred to as material 5m and is shown in the figure. As shown in Fig. 9, a photoresist PR1 is provided. The photoresist PR1 here is patterned so as to expose a portion corresponding to the recess 60 described above.

[0051] As shown in Fig. 10, the portion of material 5m that is not covered with photoresist PR1 is processed by dry etching. This etching is set so as to process material 5m while not processing the cathode electrode 32, contact portion 4 (e.g., IZO), etc. As shown in Fig. 11, photoresist PR1 (Fig. 10) is removed by ashing. As shown in Fig. 12, material for wiring 6 is provided so as to obtain wiring 6 extending from pixel region 11 to contact region 12.

[0052] Although not shown in the figure, a material 5m of the protective material 5 is then further provided so as to cover the wiring 6. The display device 10 according to the first embodiment, i.e., the configuration shown in FIG. 2 described above, is obtained. The process for obtaining the recesses 60 in the pixel region 11 and the recesses 60 in the contact region 12 is standardized (they are formed together in the same process), and these recesses 60 have the same vertical structure.

[0053] <Example of Arrangement of Recesses in Contact Region> FIGS. 13 to 16 are diagrams showing examples of arrangement of recesses 60 in the contact region 12. In the examples shown in FIGS. 13 and 14, the recesses 60 have a circular shape when viewed in a plan view (when viewed in the negative Z-axis direction). In the example shown in FIG. 13, the recesses 60 are arranged in two columns or two rows in each of the regions 121 to 124. Specifically, in each of the regions 121 and 122 whose longitudinal direction is the Y-axis direction (array column direction), the recesses 60 are arranged in two columns. In each of the regions 123 and 124 whose longitudinal direction is the X-axis direction (array row direction), the recesses 60 are arranged in two rows. In the example shown in FIG. 14, the recesses 60 are arranged in one column or one row. Naturally, the recesses 60 may be arranged in three or more columns or three or more rows.

[0054] 15, the recesses 60 have a rectangular shape when viewed from above (when viewed in the negative Z-axis direction). The rectangular shape may be a square shape or a rectangular shape. In this example, the recesses 60 are arranged in one column or one row. However, the recesses 60 may be arranged in two or more columns or rows.

[0055] 16, the recess 60 has a line shape (which can also be called a slit shape) when viewed in a plan view (when viewed in the negative direction of the Z axis). The recess 60 extends in a line shape along the longitudinal direction of each of the regions 121 to 124.

[0056] 2. Second Embodiment In the first embodiment described above, an example was described in which the light-emitting layers 30 of the pixels 1 in the pixel region 11 are separated, and the cathode electrodes 32 are also separated. However, the techniques described above can also be applied to a configuration in which they are not separated, thereby reducing the width of the contact region 12. This will be described with reference to FIG. 17 .

[0057] 17 is a diagram showing an example of a schematic configuration of a display device 10 according to the second embodiment. In a pixel region 11 of the display device 10, a light-emitting layer 30 and a cathode electrode 32 are provided in common across a plurality of pixels 1. A separator 7 is provided between adjacent pixels 1.

[0058] The protective material 5 is provided so as to cover the cathode electrode 32. However, unlike the comparative example previously described with reference to FIG.

[0059] In the pixel region 11, the wiring 6 includes at least one recess 60 whose bottom 61 contacts the cathode electrode 32. Because the cathode electrodes 32 of the plurality of pixels 1 are common to each other, it is not necessary to provide a recess 60 for every pixel 1. In the contact region 12, the wiring 6 includes one or more recesses 60 whose bottoms 61 contact the contact portions 4, as before.

[0060] Even in the configuration in which the light-emitting layers 30 of the plurality of pixels 1 are separated and the cathode electrodes 32 are separated as described above, the width of the contact region 12 can be reduced by the principles described above, thereby enabling the display device 10 to be miniaturized.

[0061] 18 to 26 are diagrams showing an example of a method for manufacturing the display device 10 according to the second embodiment. Several processes (steps) for manufacturing the display device 10 are shown schematically.

[0062] As shown in Fig. 18, an anode electrode 31 and a contact portion 4 are provided on a substrate 2. As shown in Fig. 19, a material for a light-emitting layer 30 is provided so as to cover the anode electrode 31. The material for the light-emitting layer 30 is referred to as material 30m and is illustrated. The method described above with reference to Fig. 6 is used to form the material 30m. Part of the film-forming gas flows around to the contact region 12, and the material 30m is also provided on part of the contact portion 4.

[0063] As shown in Fig. 20, a material for the cathode electrode 32 is provided so as to cover the material 30m. The material for the cathode electrode 32 is illustrated as a material 32m. As shown in Fig. 21, a material 5m for the protective material 5 is provided so as to cover the material 32m.

[0064] As shown in FIG. 22, a photoresist PR1 is provided. Here, the photoresist PR1 is patterned to expose the contact region 12. As shown in FIG. 23, dry etching is performed to process the portions of material 30m, material 32m, and material 5m that are not covered with photoresist PR1. The etching here is set to process not only material 5m, but also materials 30m and 32m. The remaining materials 30m and 32m become the light-emitting layer 30 and the cathode electrode 32. A light-emitting portion 3 including the light-emitting layer 30, the anode electrode 31, and the cathode electrode 32 is obtained.

[0065] 24, a material 5m of the protective material 5 is provided so as to cover the entire pixel region 11 and the contact region 12. As shown in Fig. 25, a photoresist PR1 is provided. The photoresist PR1 here is patterned so as to expose a portion corresponding to the recess 60 in Fig. 17 described above.

[0066] 26, the portion of material 5m that is not covered with photoresist PR1 is processed by dry etching. The etching here is set to process material 5m while not processing the cathode electrode 32 and contact portion 4. The remaining material 5m becomes the protective material 5. The photoresist PR1 (FIG. 25) is removed by ashing after the dry etching.

[0067] Although not shown in the drawing, a material for the wiring 6 is then provided so as to cover the protective material 5, the cathode electrode 32, and the contact portion 4. The configuration of FIG. 17 described above, i.e., the display device 10 according to the second embodiment, is obtained.

[0068] 3. Modifications Various modifications are possible based on the techniques described above. Some examples will be described below. The pixel 1 described above will be referred to as a sub-pixel hereinafter.

[0069] 27A to 27G , a modification of the relationship between the normal LN passing through the center of the sub-pixel (more specifically, the center of the light-emitting portion), the normal LN′ passing through the center of the lens member (for example, an on-chip lens), and the normal LN″ passing through the center of the wavelength selecting portion (for example, a color filter) will be described. FIGS. 27A to 27G are conceptual diagrams for explaining the relationship between the normal LN passing through the center of the light-emitting portion, the normal LN′ passing through the center of the lens member, and the normal LN″ passing through the center of the wavelength selecting portion. In the following description, the center of the sub-pixel will be referred to as the center of the light-emitting portion.

[0070] In the embodiment of the present disclosure, the size of the wavelength selection section (e.g., color filter) may be changed as appropriate in accordance with the light emitted by the sub-pixel. Furthermore, when a light absorption layer (black matrix layer) is provided between the wavelength selection sections (e.g., color filters) of adjacent sub-pixels, the size of the light absorption layer (black matrix layer) may be changed as appropriate in accordance with the light emitted by the sub-pixel. Furthermore, the size of the wavelength selection section (e.g., color filter) may be adjusted by adjusting the distance (offset amount) d between the normal line passing through the center of the sub-pixel and the normal line passing through the center of the color filter. ０ The planar shape of the wavelength selection unit (for example, a color filter) may be the same as, similar to, or different from the planar shape of the lens member (for example, an on-chip lens).

[0071] For example, as shown in FIG. 27A, the normal line LN passing through the center of the light-emitting unit, the normal line LN″ passing through the center of the wavelength selecting unit, and the normal line LN′ passing through the center of the lens member may be made to coincide with each other. In other words, the distance (offset amount) D between the normal line passing through the center of the light-emitting unit and the normal line passing through the center of the lens member may be set to be equal to or larger than the normal line LN″. ０ and the distance (offset amount) d between the normal line passing through the center of the light emitting section and the normal line passing through the center of the wavelength selecting section. ０ and can be equal to 0 (zero).

[0072] Also, for example, as shown in FIG. 27B, the normal line LN passing through the center of the light emitting section and the normal line LN" passing through the center of the wavelength selecting section are coincident, but the normal line LN passing through the center of the light emitting section and the normal line LN" passing through the center of the wavelength selecting section may not be coincident with the normal line LN' passing through the center of the lens member. In other words, D ０ ≠d ０ = 0.

[0073] Also, for example, as shown in FIG. 27C, the normal line LN passing through the center of the light emitting section, the normal line LN" passing through the center of the wavelength selecting section, and the normal line LN' passing through the center of the lens member may not coincide, and the normal line LN" passing through the center of the wavelength selecting section and the normal line LN' passing through the center of the lens member may coincide. In other words, D ０ = d ０ >0.

[0074] Also, for example, as shown in FIG. 27D, a normal line LN passing through the center of the light-emitting section, a normal line LN" passing through the center of the wavelength selection section, and a normal line LN' passing through the center of the lens member do not coincide with each other, and a normal line LN' passing through the center of the lens member does not coincide with the normal line LN passing through the center of the surface of the light-emitting section and the normal line LN" passing through the center of the wavelength selection section. Here, it is preferable that the center of the wavelength selection section (shown by a black circle in FIG. 27D) is located on a straight line LL connecting the center of the surface of the light-emitting section and the center of the lens member (shown by a black circle in FIG. 27D). Specifically, the distance from the center of the surface of the light-emitting section in the thickness direction to the center of the wavelength selection section is defined as LL. １ , the distance from the center of the wavelength selection portion to the center of the lens member in the thickness direction is LL ２ When this is done, D ０ >d ０ > 0, and taking into account manufacturing variations, d ０ :D ０ =LL １ : (LL １ +LL ２ ) is preferably satisfied.

[0075] In addition, the stacking relationship between the wavelength tip portion and the lens member may be reversed. In such a case, for example, as shown in FIG. 27E, the normal line LN passing through the center of the light emitting portion, the normal line LN″ passing through the center of the wavelength selecting portion, and the normal line LN′ passing through the center of the lens member may be made to coincide. In other words, D ０ = d ０ = 0.

[0076] Also, for example, as shown in FIG. 27F, the normal line LN passing through the center of the light emitting section, the normal line LN" passing through the center of the wavelength selecting section, and the normal line LN' passing through the center of the lens member may not coincide, and the normal line LN" passing through the center of the wavelength selecting section and the normal line LN' passing through the center of the lens member may coincide. In other words, D ０ = d ０ >0.

[0077] Furthermore, as shown in the conceptual diagram of FIG. 27G, a normal line LN passing through the center of the surface of the light emitting section does not coincide with a normal line LN" passing through the center of the wavelength selecting section and a normal line LN' passing through the center of the lens member, and a normal line LN' passing through the center of the lens member does not coincide with the normal line LN passing through the center of the surface of the light emitting section and the normal line LN" passing through the center of the wavelength selecting section. Here, it is preferable that the center of the wavelength selecting section is located on a straight line LL connecting the center of the surface of the light emitting section and the center of the lens member. Specifically, the distance from the center of the surface of the light emitting section in the thickness direction to the center of the wavelength selecting section (shown by a black circle in FIG. 27G) is defined as LL. １ , the distance from the center of the wavelength selective portion in the thickness direction to the center of the lens member (shown by a black circle in FIG. 27G) is LL ２ When this is the case, d ０ >D ０ >0, and taking into account manufacturing variations, D ０ :d ０ =LL ２ : (LL １ +LL ２ ) is preferably satisfied.

[0078] 3.2 Modification 2 The subpixels used in the display devices according to the above-described embodiments of the present disclosure may be configured to include a resonator structure that resonates light generated in the light-emitting portion. Hereinafter, the resonator structure will be described with reference to FIGS. 28 to 34 . FIG. 28 is a schematic cross-sectional view illustrating a first example of the resonator structure, FIG. 29 is a schematic cross-sectional view illustrating a second example of the resonator structure, and FIG. 30 is a schematic cross-sectional view illustrating a third example of the resonator structure. Furthermore, FIG. 31 is a schematic cross-sectional view illustrating a fourth example of the resonator structure, and FIG. 32 is a schematic cross-sectional view illustrating a fifth example of the resonator structure. Furthermore, FIG. 33 is a schematic cross-sectional view illustrating a sixth example of the resonator structure, and FIG. 34 is a schematic cross-sectional view illustrating a seventh example of the resonator structure.

[0079] (Resonator Structure: First Example) Fig. 28 is a schematic cross-sectional view for explaining a first example of a resonator structure. In the first example, the first electrode (e.g., anode electrode) 1202 is formed to have a common film thickness in each sub-pixel 1100. The same is true for the second electrode (e.g., cathode electrode) 1206.

[0080] 28 , a reflector 1401 is disposed below the first electrode 1202 of the subpixel 1100, with an optical adjustment layer 1402 sandwiched therebetween. A resonator structure is formed between the reflector 1401 and the second electrode 1206, which resonates light generated by the organic layer (more specifically, the light-emitting portion) 1204.

[0081] The reflector 1401 is formed to have a common film thickness in each sub-pixel 1100. The film thickness of the optical adjustment layer 1402 varies depending on the color to be displayed by the sub-pixel 1100. The sub-pixel 1100 that displays red is also referred to as sub-pixel 1100R. The sub-pixel 1100 that displays green is also referred to as sub-pixel 1100G. The sub-pixel 1100 that displays blue is also referred to as sub-pixel 1100B. By having the optical adjustment layers 1402R, 1402G, and 1402B have different film thicknesses, it is possible to set an optical distance that generates optimal resonance for the wavelength of light corresponding to the color to be displayed.

[0082] 28 , the reflectors 1401 in the sub-pixels 1100R, 1100G, and 1100B are arranged so that their upper surfaces are aligned. As described above, the film thickness of the optical adjustment layer 1402 differs depending on the color to be displayed by the sub-pixel 1100, and therefore the position of the upper surface of the second electrode 1206 differs depending on the type of the sub-pixel 1100R, 1100G, and 1100B.

[0083] The reflector 1401 can be formed using, for example, a metal such as aluminum (Al), silver (Ag), or copper (Cu), or an alloy containing these as the main component.

[0084] The optical adjustment layer 1402 can be made of an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon oxynitride (SiOxNy), or an organic resin material such as an acrylic resin or a polyimide resin. The optical adjustment layer 1402 may be a single layer or a laminated film made of a plurality of these materials. Furthermore, the number of layers may vary depending on the type of sub-pixel 1100.

[0085] The first electrode 1202 can be formed using a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).

[0086] The second electrode 1206 preferably functions as a semi-transmissive reflective film. The second electrode 1206 can be formed using magnesium (Mg) or silver (Ag), a magnesium-silver alloy (MgAg) containing these as main components, an alloy containing an alkali metal or an alkaline earth metal, or the like.

[0087] 29 is a schematic cross-sectional view illustrating a second example of the resonator structure. In the second example, the first electrode 1202 and the second electrode 1206 are formed to have the same film thickness in each sub-pixel 1100.

[0088] Also in the second example, a reflector 1401 is disposed below the first electrode 1202 of the subpixel 1100, with an optical adjustment layer 1402 sandwiched therebetween. A resonator structure that resonates light generated by the organic layer 1204 is formed between the reflector 1401 and the second electrode 1206. As in the first example, the reflector 1401 is formed to a common thickness in each subpixel 1100, and the thickness of the optical adjustment layer 1402 differs depending on the color that the subpixel 1100 is to display.

[0089] In the first example shown in Figure 28, the upper surfaces of the reflectors 1401 in the sub-pixels 1100R, 1100G, and 1100B are arranged to be aligned, and the position of the upper surface of the second electrode 1206 differs depending on the type of the sub-pixels 1100R, 1100G, and 1100B.

[0090] 29 , the upper surfaces of the second electrodes 1206 are aligned in the sub-pixels 1100R, 1100G, and 1100B. To align the upper surfaces of the second electrodes 1206, the upper surfaces of the reflectors 1401 in the sub-pixels 1100R, 1100G, and 1100B are aligned differently depending on the type of the sub-pixels 1100R, 1100G, and 1100B. Therefore, the lower surface of the reflector 1401 has a stepped shape that corresponds to the type of the sub-pixels 1100R, 1100G, and 1100B.

[0091] The materials constituting the reflector 1401, the optical adjustment layer 1402, the first electrode 1202 and the second electrode 1206 are the same as those described in the first example, and therefore will not be described again.

[0092] 30 is a schematic cross-sectional view illustrating a third example of the resonator structure. In the third example, the first electrode 1202 and the second electrode 1206 are formed to have the same film thickness in each sub-pixel 1100.

[0093] Also in the third example, a reflector 1401 is disposed below the first electrode 1202 of the subpixel 1100, with an optical adjustment layer 1402 sandwiched therebetween. A resonator structure that resonates light generated by the organic layer 1204 is formed between the reflector 1401 and the second electrode 1206. As in the first and second examples, the film thickness of the optical adjustment layer 1402 varies depending on the color to be displayed by the subpixel 1100. As in the second example, the upper surface of the second electrode 1206 is disposed so as to be aligned with the subpixels 1100R, 1100G, and 1100B.

[0094] In the second example shown in FIG. 29, in order to align the upper surfaces of the second electrodes 1206, the lower surface of the reflector 1401 has a stepped shape corresponding to the type of the sub-pixels 1100R, 1100G, and 1100B.

[0095] 30, the film thickness of the reflector 1401 is set to differ depending on the type of the sub-pixels 1100R, 1100G, and 1100B. More specifically, the film thickness is set so that the bottom surfaces of the reflectors 1401R, 1401G, and 1401B are aligned.

[0096] The materials constituting the reflector 1401, the optical adjustment layer 1402, the first electrode 1202 and the second electrode 1206 are the same as those described in the first example, and therefore will not be described again.

[0097] (Fourth Example of Resonator Structure) FIG. 31 is a schematic cross-sectional view for explaining a fourth example of the resonator structure.

[0098] 28 , the first electrode 1202 and the second electrode 1206 of the subpixel 1100 are formed to have the same film thickness. A reflector 1401 is disposed below the first electrode 1202 of the subpixel 1100 with an optical adjustment layer 1402 sandwiched therebetween.

[0099] In contrast to this, in the fourth example shown in FIG. 31, the optical adjustment layer 1402 is omitted, and the film thickness of the first electrode 1202 is set to differ depending on the type of the sub-pixels 1100R, 1100G, and 1100B.

[0100] The reflector 1401 is formed to have a common film thickness in each sub-pixel 1100. The film thickness of the first electrode 1202 varies depending on the color to be displayed by the sub-pixel 1100. By having the first electrodes 1202R, 1202G, and 1202B have different film thicknesses, it is possible to set an optical distance that generates optimal resonance for the wavelength of light corresponding to the color to be displayed.

[0101] The materials constituting the reflector 1401, the first electrode 1202 and the second electrode 1206 are the same as those described in the first example, and therefore a description thereof will be omitted.

[0102] (Resonator Structure: Fifth Example) FIG. 32 is a schematic cross-sectional view for explaining a fifth example of the resonator structure.

[0103] 28 , the first electrode 1202 and the second electrode 1206 are formed to have the same film thickness in each subpixel 1100. A reflector 1401 is disposed below the first electrode 1202 of the subpixel 1100 with an optical adjustment layer 1402 sandwiched therebetween.

[0104] 32, the optical adjustment layer 1402 is omitted, and instead, an oxide film 1404 is formed on the surface of the reflector 1401. The thickness of the oxide film 1404 is set to differ depending on the type of the sub-pixels 1100R, 1100G, and 1100B.

[0105] The thickness of the oxide film 1404 varies depending on the color to be displayed by the sub-pixel 1100. By having the oxide films 1404R, 1404G, and 1404B have different thicknesses, it is possible to set an optical distance that produces optimal resonance for the wavelength of light corresponding to the color to be displayed.

[0106] The oxide film 1404 is a film obtained by oxidizing the surface of the reflector 1401, and is made of, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. The oxide film 1404 functions as an insulating film for adjusting the optical path length (optical distance) between the reflector 1401 and the second electrode 1206.

[0107] The oxide film 1404, which has a different thickness depending on the type of the sub-pixels 1100R, 1100G, and 1100B, can be formed, for example, as follows.

[0108] First, a container is filled with an electrolyte, and the substrate on which the reflector 1401 is formed is immersed in the electrolyte. An electrode is also disposed so as to face the reflector 1401.

[0109] Then, a positive voltage is applied to the reflector 1401 with the electrode as a reference, and the reflector 1401 is anodized. The thickness of the oxide film formed by anodization is proportional to the voltage value applied to the electrode. Therefore, anodization is performed while applying voltages to the reflectors 1401R, 1401G, and 1401B according to the types of sub-pixels 1100R, 1100G, and 1100B, respectively. This allows oxide films 1404 with different thicknesses to be formed simultaneously.

[0110] The materials constituting the reflector 1401, the first electrode 1202 and the second electrode 1206 are the same as those described in the first example, and therefore a description thereof will be omitted.

[0111] (Cavity Resonator Structure: Sixth Example) FIG. 33 is a schematic cross-sectional view illustrating a sixth example of the cavity resonator structure. In the sixth example, the subpixel 1100 is configured by stacking a first electrode 1202, an organic layer 1204, and a second electrode 1206. However, in the sixth example, the first electrode 1202 is formed to function as both an electrode and a reflector. The first electrode (also known as reflector) 1202 is formed from a material having optical constants selected according to the type of subpixel 1100R, 1100G, or 1100B. By varying the phase shift caused by the first electrode (also known as reflector) 1202, it is possible to set an optical distance that generates optimal resonance for the wavelength of light corresponding to the color to be displayed.

[0112] The first electrode (also serving as a reflector) 1202 can be made of a metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing any of these as a main component. For example, the first electrode (also serving as a reflector) 1202R of the subpixel 1100R can be made of copper (Cu), and the first electrode (also serving as a reflector) 1202G of the subpixel 1100G and the first electrode (also serving as a reflector) 1202B of the subpixel 1100B can be made of aluminum.

[0113] The material constituting the second electrode 1206 is the same as that described in the first example, and therefore a description thereof will be omitted.

[0114] (Resonator Structure: Seventh Example) Figure 34 is a schematic cross-sectional view illustrating a seventh example of the resonator structure. The seventh example is basically a configuration in which the sixth example is applied to the sub-pixels 1100R and 1100G, and the first example is applied to the sub-pixel 1100B. Even with this configuration, it is possible to set an optical distance that generates optimal resonance for the wavelength of light corresponding to the color to be displayed.

[0115] The first electrodes (which also serve as reflectors) 1202R and 1202G used in the sub-pixels 1100R and 1100G 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.

[0116] The materials constituting the reflector 1401B, the optical adjustment layer 1402B, and the first electrode 1202B used in the sub-pixel 1100B are the same as those described in the first example, and therefore description thereof will be omitted.

[0117] For example, the technology according to the present disclosure may be applied to the display units of various electronic devices. Therefore, examples of electronic devices to which the technology can be applied will be described below.

[0118] 35A is a front view showing an example of the appearance of a digital still camera 500, and Fig. 35B is a rear view showing an example of the appearance of the digital still camera 500. This digital still camera 500 is an interchangeable lens single-lens reflex type, and has an interchangeable taking lens unit (interchangeable lens) 512 located approximately in the center of the front of a camera main body 511, and a grip part 513 for the photographer to hold on the left side of the front.

[0119] A monitor 514 is provided at a position shifted to the left from the center on the back of the camera body 511. An electronic viewfinder (eyepiece window) 515 is provided above the monitor 514. By looking through the electronic viewfinder 515, the photographer can visually confirm the optical image of the subject guided by the photographing lens unit 512 and determine the composition. The display device 10 according to an embodiment of the present disclosure can be used as the monitor 514 or the electronic viewfinder 515.

[0120] 36 is an external view of a head-mounted display 600. The head-mounted display 600 has, for example, ear hooks 612 for wearing on the user's head on both sides of a glasses-shaped display unit 611. In this head-mounted display 600, the display device 10 according to an embodiment of the present disclosure can be used as the display unit 611.

[0121] 37 is an external view of a see-through head mounted display 634. The see-through head mounted display 634 is composed of a main body 632, an arm 633, and an eyepiece tube 631.

[0122] The main body 632 is connected to the arm 633 and the glasses 630. Specifically, an end of the long side of the main body 632 is coupled to the arm 633, and one side of the main body 632 is connected to the glasses 630 via a connecting member. The main body 632 may also be worn directly on the head of the human body.

[0123] The main body 632 incorporates a control board for controlling the operation of the see-through head-mounted display 634 and a display unit. The arm 633 connects the main body 632 to the lens barrel 631 and supports the lens barrel 631. Specifically, the arm 633 is coupled to an end of the main body 632 and an end of the lens barrel 631, respectively, and fixes the lens barrel 631. The arm 633 also incorporates a signal line for communicating data related to images provided from the main body 632 to the lens barrel 631.

[0124] The lens barrel 631 projects image light provided from the main body 632 via the arm 633 through an eyepiece lens toward the eyes of a user wearing the see-through head mounted display 634. In this see-through head mounted display 634, the display unit of the main body 632 can use the display device 10 according to an embodiment of the present disclosure.

[0125] 38 shows an example of the appearance of a television device 710. This television device 710 has, for example, an image display screen unit 711 including a front panel 712 and a filter glass 713, and this image display screen unit 711 is configured by the display device 10 according to an embodiment of the present disclosure.

[0126] 39 shows an example of the appearance of a smartphone 800. The smartphone 800 has a display unit 802 that displays various information, an operation unit that includes buttons and the like that accept operation inputs from the user, and the like. The display unit 802 can be the display device 10 according to this embodiment.

[0127] 40A and 40B are diagrams showing the configuration of the interior of a vehicle having a display device 10 according to an embodiment of the present disclosure. In detail, Fig. 40A is a diagram showing the interior of the vehicle from the rear to the front, and Fig. 40B is a diagram showing the interior of the vehicle from diagonally rear to diagonally front.

[0128] 40A and 40B has a center display 911, a console display 912, a head-up display 913, a digital rearview mirror 914, a steering wheel display 915, and a rear entertainment display 916. The display device 10 according to an embodiment of the present disclosure can be applied to some or all of these displays.

[0129] The center display 911 is disposed on the center console 907 in a position facing the driver's seat 901 and the passenger seat 902. While FIGS. 40A and 40B show an example of a horizontally elongated center display 911 extending from the driver's seat 901 side to the passenger seat 902 side, the screen size and location of the center display 911 are arbitrary. The center display 911 can display information detected by various sensors (not shown). As a specific example, the center display 911 can display an image captured by an image sensor, a distance image to obstacles in front of or to the side of the vehicle measured by a ToF (Time of Flight) sensor, the body temperature of a passenger detected by an infrared sensor, etc. The center display 911 can be used to display, for example, at least one of safety-related information, operation-related information, a life log, health-related information, authentication / identification-related information, and entertainment-related information.

[0130] The safety-related information includes information such as detection of drowsiness, distraction, child mischief, whether a seatbelt is fastened, and whether a passenger has been abandoned. This information is detected, for example, by a sensor (not shown) placed on the rear side of the center display 1911. The operation-related information is obtained by detecting gestures related to passenger operations using a sensor. The detected gestures may include operations of various in-vehicle equipment. For example, the sensor may detect operations of the air conditioning system, navigation system, AV (audio / visual) system, lighting system, etc. The life log includes life logs of all passengers. For example, the life log includes a record of each passenger's behavior while in the vehicle. By acquiring and saving the life log, the condition of the passenger at the time of the accident can be confirmed. The health-related information is obtained by detecting the passenger's body temperature using a temperature sensor and inferring the passenger's health condition based on the detected body temperature. Alternatively, the passenger's face may be captured using an image sensor, and the passenger's health condition may be inferred from the facial expression in the captured image. Furthermore, the system may have an automated voice conversation with the occupant and estimate the occupant's health condition based on the occupant's responses. The authentication / identification-related information includes a keyless entry function that uses a sensor to perform facial authentication, a function that automatically adjusts seat height and position using facial recognition, etc. The entertainment-related information includes a function that uses a sensor to detect operation information of an AV device by the occupant, a function that recognizes the occupant's face using a sensor and provides content suitable for the occupant via the AV device, etc.

[0131] The console display 912 can be used to display, for example, life log information. The console display 912 is disposed near the shift lever 908 on the center console 907 between the driver's seat 901 and the passenger seat 902. The console display 912 can also display information detected by various sensors (not shown). The console display 912 may also display an image of the vehicle's surroundings captured by an image sensor, or an image showing the distance to obstacles around the vehicle.

[0132] The head-up display 913 is virtually displayed behind the windshield 904 in front of the driver's seat 901. The head-up display 913 can be used to display, for example, at least one of safety-related information, operation-related information, a life log, health-related information, authentication / identification-related information, and entertainment-related information. Since the head-up display 913 is often virtually disposed in front of the driver's seat 901, it is suitable for displaying information directly related to the operation of the vehicle, such as the vehicle's speed and remaining fuel (battery) level.

[0133] The digital rearview mirror 914 can not only display the view behind the vehicle but also the status of passengers in the rear seats. Therefore, by placing a sensor (not shown) on the back side of the digital rearview mirror 914, it can be used to display life log information, for example.

[0134] The steering wheel display 915 is disposed near the center of the steering wheel 906 of the vehicle. The steering wheel display 915 can be used to display at least one of, for example, safety-related information, operation-related information, a life log, health-related information, authentication / identification-related information, and entertainment-related information. In particular, because the steering wheel display 915 is located near the driver's hands, it is suitable for displaying life log information such as the driver's body temperature, and for displaying information related to the operation of AV equipment, air conditioning equipment, etc.

[0135] The rear entertainment display 916 is attached to the back side of the driver's seat 901 and the passenger seat 902 and is intended for viewing by rear seat passengers. The rear entertainment display 916 can be used to display, for example, at least one of safety-related information, operation-related information, a life log, health-related information, authentication / identification-related information, and entertainment-related information. In particular, since the rear entertainment display 916 is located directly in front of the rear seat passengers, information related to the rear seat passengers is displayed on the rear entertainment display 916. For example, the rear entertainment display 916 may display information related to the operation of an AV device or an air conditioning system, or may display the results of measurements such as the body temperature of the rear seat passengers taken with a temperature sensor (not shown).

[0136] 5. Summary The techniques described above can be specified, for example, as follows. One of the techniques disclosed is a display device 10. As described with reference to FIGS. 1 to 4 , 13 to 17 , etc., the display device 10 includes a pixel region 11 in which a plurality of pixels 1 are provided, a contact region 12 adjacent to the pixel region 11 and in which contact portions 4 are provided, and wiring 6 extending from the pixel region 11 to the contact region 12. Each of the plurality of pixels 1 includes a light-emitting layer 30 containing an organic material, and an anode electrode 31 and a cathode electrode 32 located on opposite sides of the light-emitting layer 30. The wiring 6 connects the anode electrode 31 and the contact portions 4. In the contact region 12, the wiring 6 includes a recess 60 (formed as, for example, a via) whose bottom 61 contacts the contact portion 4. For example, the width of the contact region 12 may be 100 μm or less in a plan view (when viewed in the negative direction of the Z axis).

[0137] 5 to 7, the display device 10 can reduce the width of the contact region 12 compared to a configuration in which the light-emitting layer 30 extends to a portion of the contact region 12 and the cathode electrode 32 extends beyond that to connect to the contact portion 4. This allows the display device 10 to be made smaller accordingly.

[0138] 2 to 4, 13 to 15, 17, etc., in the contact region 12, the wiring 6 may include a plurality of recesses 60, each of whose bottoms 61 contacts the contact portion 4. This makes it possible to reduce the contact resistance compared to when there is only one recess 60. This makes it possible to stabilize the connection of the recess 60 to the contact portion 4 of the cathode electrode 32.

[0139] 2 to 4 and 17 , in the pixel region 11, the wiring 6 may include a recess 60 whose bottom 61 is in contact with the cathode electrode 32. For example, in this manner, connection between the wiring 6 and the cathode electrode 32 can be obtained in the pixel region 11.

[0140] 2 and 3 , the light-emitting layer 30 of each of the plurality of pixels 1 is separated, the cathode electrode 32 of each of the plurality of pixels 1 is separated, and in the pixel region 11, the wiring 6 may include a plurality of recesses 60, each of which has a bottom 61 in contact with the cathode electrode 32 of a corresponding pixel 1 among the plurality of pixels 1. For example, in this way, even when the light-emitting layer 30 and the cathode electrode 32 are separated between the plurality of pixels 1, connection between the wiring 6 and the cathode electrode 32 of each pixel 1 can be obtained.

[0141] 2 and 3 , the recess 60 in the pixel region 11 and the recess 60 in the contact region 12 may have the same vertical structure when viewed from the side (when viewed in the X-axis direction or the Y-axis direction). The vertical structure may be defined by a bottom 61 of the recess 60, a sidewall 62 of the recess 60, and the protective material 5 provided to fill the recess. The process for obtaining the recess 60 in the pixel region 11 and the recess 60 in the contact region 12 can be made common.

[0142] As described with reference to Figure 4 etc., when viewed in a plan view (when viewed in the negative direction of the Z axis), the pattern of the multiple recesses 60 in the pixel region 11 and the pattern of the multiple recesses 60 in the contact region 12 may be the same. For example, when viewed in a plan view, the area ratio of the multiple recesses 60 in the pixel region 11 to the entire pixel region 11 may be the same as the area ratio of the multiple recesses 60 in the contact region 12 to the entire contact region 12. When viewed in a plan view, the arrangement interval of the multiple recesses 60 in the pixel region 11 and the arrangement interval of the multiple recesses 60 in the contact region 12 may be the same. Making the pattern of the recesses 60 uniform increases the possibility of suppressing changes in processing rate and suppressing film peeling.

[0143] 4, 13, 14, etc., the recess 60 in the contact region 12 may have a circular shape. As described with reference to FIG. 15, etc., the recess 60 in the contact region 12 may have a rectangular shape. As described with reference to FIG. 16, etc., the recess 60 in the contact region 12 may have a line shape. For example, a connection to the contact portion 4 can be obtained by using the recess 60 having such various planar shapes.

[0144] 2 and 3 , the wiring 6 and the cathode electrode 32 may include the same material. The cathode electrode 32 can be connected to the contact portion 4 of the contact region 12 by the wiring 6 having the same electrical properties as the cathode electrode 32. For example, the wiring 6 may include at least one of W, Al, Cu, TiN, TiO, tin oxide, aluminum zinc oxide, gallium zinc oxide, indium zinc oxide, IGZO, ITZO, CuI, InSbO4, ZnMgO, CuInO2, MgIn2O4, CdO, and ZnSnO3. For example, the wiring 6 can be formed using such a variety of materials.

[0145] 1 to 4, 13 to 17, 35A to 39, etc., electronic devices equipped with the display device 10, such as a digital still camera 500, a head-mounted display 600, a television device 710, and a smartphone 800, are also among the disclosed technologies. By incorporating the display device 10 described above, the possibility of miniaturizing the electronic device increases.

[0146] The effects described in this disclosure are merely examples and are not limited to the disclosed contents. Other effects may also be obtained.

[0147] In the display device 10 according to the embodiment described so far, the contact portion 4 with which the recess 60 of the wiring 6 in the contact region 12 comes into contact has a structure corresponding to the cathode electrode 32 in the pixel region 11. This contact portion may be connected to a structure corresponding to the anode electrode 31 in the pixel region 11. This will be described with reference to FIG. 41 .

[0148] 41 is a diagram showing an example of a schematic configuration of the contact region 12. The contact part 4 includes a light-emitting layer structure 40, an anode electrode structure 41, and a cathode electrode structure 42. The light-emitting layer structure 40, the anode electrode structure 41, and the cathode electrode structure 42 have the same structures as the light-emitting layer 30, the anode electrode 31, and the cathode electrode 32 in the pixel region 11 (see FIG. 3, etc.).

[0149] In the contact region 12, the recess 60 of the wiring 6 contacts the cathode electrode structure 42 of the contact portion 4. This cathode electrode structure 42 may be connected to the anode electrode structure 41. In the example shown in Fig. 41 , the cathode electrode structure 42 contacts the anode electrode structure 41 at a position outside the light-emitting layer structure 40.

[0150] 41 also shows some wirings 20 and vias 21 included in the substrate 2. The anode electrode structure 41 is connected to the wirings 20 through the vias 21. The wirings 20 are connected to the anode electrodes 31 (e.g., FIG. 3 ) in the pixel regions 11, for example, through other circuit elements (e.g., transistors).

[0151] This allows for a more efficient connection between the recess 60 and the anode electrode structure 41. Such a modification will be described with reference to FIGS.

[0152] 42 and 43 are diagrams showing modified examples. Fig. 42 shows a schematic cross section of a part of the pixel region 11 and the contact region 12 as viewed from the side. Fig. 43 shows a more detailed configuration of the contact region 12.

[0153] A plurality of structures 8 are provided in the contact region 12. The structures 8 have the same structure as the pixels 1 in the pixel region 11. When viewed from the side (when viewed in the X-axis direction or the Y-axis direction), the pixels 1 in the pixel region 11 and the structures 8 in the contact region 12 have the same vertical structure.

[0154] Specifically, the structure 8 includes a light-emitting layer structure 40, an anode electrode structure 41, a cathode electrode structure 42, and a protective material 5 provided to cover them. The light-emitting layer structure 40 may include an organic material, similar to the light-emitting layer 30. The anode electrode structure 41 and the cathode electrode structure 42 are located on opposite sides of the light-emitting layer structure 40. The anode electrode structure 41, the light-emitting layer structure 40, and the cathode electrode structure 42 are stacked in this order in the positive direction of the Z axis. The materials of the anode electrode structure 41 and the cathode electrode structure 42 may be the same as the materials of the anode electrode 31 and the cathode electrode 32.

[0155] The anode electrode structures 41 of the plurality of structures 8 are commonly connected. On the other hand, the light-emitting layer structures 40 of adjacent structures 8 of the plurality of structures 8 are separated from each other. Similarly, the cathode electrode structures 42 of adjacent structures 8 of the plurality of structures 8 are also separated from each other.

[0156] Of the anode electrode structure 41 provided in common across multiple structures 8, the portion between adjacent structures 8 is not covered by the light-emitting layer structure 40 or the cathode electrode structure 42. This exposed portion of the cathode electrode structure 42 is referred to as the anode electrode structure 41a and is illustrated. In the contact region 12, the recess 60 of the wiring 6 contacts the anode electrode structure 41a. In other words, the contact portion 4 with which the recess 60 contacts is the anode electrode structure 41a.

[0157] 44 is a diagram showing an example of a planar layout of the contact region 12. In plan view (viewed in the negative Z-axis direction), the recess 60 in the contact region 12 is provided so as to surround the structure 8. Since the multiple structures 8 are arranged with intervals between them, the recess 60 is provided so as to extend between adjacent structures 8.

[0158] <Example of Manufacturing Method> FIGS. 45 to 48 are diagrams showing an example of a manufacturing method.

[0159] 45 , a light-emitting section 3 and a contact section 4 are provided on a substrate 2, and a material 5m of a protective material 5 is provided to cover them, so as to obtain a configuration corresponding to a pixel 1 and a structure 8. By separating the light-emitting layer structure 40 and the cathode electrode structure 42 of each structure 8, an anode electrode structure 41a located between adjacent structures 8 is obtained.

[0160] 46, a photoresist PR1 is provided so as to expose the portion corresponding to the recess 60.

[0161] As shown in Fig. 47, the portion of the material 5m that is not covered with the photoresist PR1 is processed by dry etching. As shown in Fig. 48, the photoresist PR1 (Fig. 47) is removed by ashing. The contact portion 4 having the exposed anode electrode structure 41a is obtained.

[0162] Thereafter, a material for the wiring 6 is provided so as to obtain the wiring 6 extending from the pixel region 11 to the contact region 12. As a result, the configuration shown in FIG.

[0163] <Further Modifications of Opening Processing> As described above, in the contact region 12, the light-emitting layer structure 40 and the cathode electrode structure 42 of each structure 8 are separated so as to obtain an exposed anode electrode structure 41a. This processing can also be referred to as processing for obtaining an opening that exposes the anode electrode structure 41a, and will hereinafter also be referred to as opening processing. Opening processing can be performed at various times, and several examples will be described with reference to FIGS. 49 to 51 .

[0164] 49 to 51 are diagrams illustrating an example of opening processing. In the example shown in FIG. 49, after a portion corresponding to the recess 60 is formed in the pixel region 11, opening processing is performed in the contact region 12. As shown in FIG. 49A, photoresist PR1 is provided to cover the entire contact region 12. In this state, a portion corresponding to the recess 60 is formed in the pixel region 11. The contact region 12 covered with photoresist PR1 is not processed. Thereafter, opening processing is performed as shown in FIG. 49B. Portions of the light-emitting layer structure 40 and the cathode electrode structure 42 located between adjacent structures 8 are removed. The photoresist PR1 is removed by ashing and etch-back. A contact portion 4 having an anode electrode structure 41a is obtained. As shown in FIG. 49C, by providing wiring 6, a recess 60 contacting the contact portion 4, more specifically, the anode electrode structure 41a, is obtained.

[0165] In the example shown in Figure 50, a portion corresponding to the recess 60 is formed in the pixel region 11, and at the same time, an opening is also formed in the contact region 12. As shown in Figure 50(A), a photoresist PR1 is provided that is patterned to expose the space between adjacent structures 8. As shown in Figure 50(B), the opening results in a contact portion 4 having an anode electrode structure 41a. The photoresist PR1 is removed by ashing and etch-back. As shown in Figure 50(C), a wiring 6 is provided, thereby forming a recess 60 that contacts the contact portion 4, more specifically, the anode electrode structure 41a.

[0166] In the example shown in Figure 51, before a portion corresponding to the recess 60 is formed in the pixel region 11, an opening is formed in the contact region 12. As shown in Figure 51 (A), an opening is formed in the contact region 12. A contact portion 4 having an anode electrode structure 41a is obtained. As shown in Figure 51 (B), a photoresist PR1 is provided so as to cover the entire contact region 12. In this state, a portion corresponding to the recess 60 is formed in the pixel region 11. The photoresist PR1 is removed by ashing. Thereafter, as shown in Figure 51 (C), a wiring 6 is provided to obtain the contact portion 4, more specifically, the recess 60 that contacts the anode electrode structure 41a.

[0167] <Modifications of Planar Layout> Of the above-described methods, when using photoresist PR1 patterned as shown in Fig. 50, the degree of freedom in designing the planar layout of the recess 60 in the contact region 12 is improved. As shown in Fig. 44 described above, a planar layout in which the recess 60 surrounds the structure 8 is also possible, and other planar layouts are also possible. An example of another planar layout will be described with reference to Fig. 52.

[0168] 52 is a diagram showing an example of a planar layout of the contact region 12. A plurality of recesses 60, each having a circular shape, are provided at intervals. In this example, the recesses 60 have a circular shape. However, shapes other than a circular shape are also possible.

[0169] According to the above-described modified example, the connection from the recess 60 to the anode electrode structure 41 in the contact region 12 can be shortened. Taking the previously described configuration of FIG. 41 as a comparative example, in the comparative example, the recess 60 is connected to the cathode electrode structure 42 via the anode electrode structure 41. Furthermore, the cathode electrode structure 42 contacts the anode electrode structure 41 at a position outside the light-emitting layer structure 40. The resistance value from the recess 60 to the cathode electrode structure 42, i.e., the connection resistance, increases. In contrast, according to the previously described configurations of FIGS. 42 and 43 , the recess 60 is directly connected to the anode electrode structure 41 in the contact region 12. This reduces the connection resistance from the recess 60 to the anode electrode structure 41. This provides advantages such as reduced heat generation due to the reduced resistance and ensuring a current supply to the pixel 1.

[0170] 44 described above, when the recess 60 is provided in the contact region 12 so as to surround the structure 8, the recess 60 and the anode electrode structure 41a come into contact with each other over a wide area excluding the structure 8. This strengthens the electrical connection between the recess 60 and the anode electrode structure 41, and further enhances the effect of reducing the resistance described above.

[0171] Furthermore, according to the above modification, opening processing is performed using photoresist PR1 in a state where contact region 12 having a structure similar to that of pixel 1 in pixel region 11 is present in structure 8. Since an opening pattern similar to that of pixel region 11 is obtained in contact region 12, shape variations due to pattern differences can be suppressed. One example of shape variations is when material to be processed accumulates on the edge of the opening during opening processing, resulting in the creation of a fence.

[0172] The thicker the photoresist PR1 (the larger the aspect ratio), the more likely a fence is to occur. If the structures 8 were not present in the contact region 12, a portion of the photoresist PR1 would infiltrate between the pixels 1 in the pixel region 11, whereas such infiltration would not occur in the contact region 12, potentially resulting in a correspondingly thicker photoresist PR1. For example, in the previously described FIG. 9 , the thickness of the photoresist PR1 in the contact region 12 could be greater than the thickness of the upper portion of the photoresist PR1 in the pixel region 11. The problem of fences could become apparent in the contact region 12.

[0173] According to the above modification, even in the contact region 12, a portion of the photoresist PR1 penetrates between the structures 8, so the thickness of the photoresist PR1 is suppressed to the same level as the thickness in the pixel region 11. This suppresses the occurrence of fences in the contact region 12. This can address various problems that may arise from fences, such as poor routing of the wiring 6 (one example of which is made of IZO) and poor coverage of the protective material 5 (one example of which is made of SiN). It can also suppress the generation of dust caused by scattering from the fence. It can also suppress waveform fluctuations used in EPD (End Point Detection).

[0174] Although the embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present disclosure. Furthermore, components of different embodiments and modifications may be combined as appropriate.

[0175] The present technology can also be configured as follows. (1) A display device comprising: a pixel region in which a plurality of pixels are provided; a contact region adjacent to the pixel region and in which a contact portion is provided; and wiring extending from the pixel region to the contact region, wherein each of the plurality of pixels includes: a light-emitting layer containing an organic material; and an anode electrode and a cathode electrode located on opposite sides of the light-emitting layer, the wiring connecting the anode electrode and the contact portion, and in the contact region, the wiring including a recess whose bottom is in contact with the contact portion. (2) The display device according to (1), wherein a width of the contact region is 100 μm or less in a plan view. (3) The display device according to (1) or (2), wherein, in the contact region, the wiring includes a plurality of the recesses whose bottoms each contact the contact portion. (4) The display device according to any of (1) to (3), wherein, in the pixel region, the wiring includes a recess whose bottom is in contact with the cathode electrode. (5) The display device according to any one of (1) to (4), wherein the light-emitting layers of the plurality of pixels are separated, the cathode electrodes of the plurality of pixels are separated, and the wiring in the pixel region includes a plurality of recesses, each of which has a bottom in contact with a cathode electrode of a corresponding pixel among the plurality of pixels. (6) The display device according to (5), wherein the recesses in the pixel region and the recesses in the contact region have the same vertical structure when viewed from the side. (7) The display device according to (6), wherein the vertical structure is defined by the bottom of the recess, sidewalls of the recess, and a protective material provided to fill the recess. (8) The display device according to any one of (5) to (7), wherein the wiring in the contact region includes a plurality of recesses, each of which has a bottom in contact with the contact portion, and wherein the pattern of the plurality of recesses in the pixel region and the pattern of the plurality of recesses in the contact region are the same when viewed in a plan view.(9) The display device according to (8), wherein, in a plan view, an area ratio of the entire plurality of recesses in the pixel region to the entire pixel region is equal to an area ratio of the entire plurality of recesses in the contact region to the entire contact region. (10) The display device according to (8) or (9), wherein, in a plan view, an arrangement interval of the plurality of recesses in the pixel region is equal to an arrangement interval of the plurality of recesses in the contact region. (11) The display device according to any of (1) to (10), wherein the recesses are formed as vias. (12) The display device according to any of (1) to (11), wherein, in a plan view, the recesses in the contact region have a circular shape. (13) The display device according to any of (1) to (11), wherein, in a plan view, the recesses in the contact region have a rectangular shape. (14) The display device according to any one of (1), (2), and (4) to (7) and (11) not citing (3), wherein the recess in the contact region has a line shape in plan view. (15) The display device according to any one of (1) to (14), wherein the wiring and the cathode electrode contain the same material. (16) The display device according to any one of (1) to (15), wherein the wiring contains at least one of W, Al, Cu, TiN, TiO, tin oxide, aluminum zinc oxide, gallium zinc oxide, indium zinc oxide, IGZO, ITZO, CuI, InSbO4, ZnMgO, CuInO2, MgIn2O4, CdO, and ZnSnO3.(17) The display device according to any one of (1) to (16), wherein a plurality of structures are provided in the contact region, each of the plurality of structures including: a light-emitting layer structure containing an organic material; and an anode electrode structure and a cathode electrode structure located on opposite sides of the light-emitting layer structure, wherein the light-emitting layer structures of adjacent structures among the plurality of structures are separated from each other, the cathode electrode structures of adjacent structures among the plurality of structures are separated from each other, the anode electrode structures of the plurality of structures are commonly connected, and the contact portion is a portion of the anode electrode structure located between adjacent structures. (18) The display device according to (17), wherein, in the contact region, the wiring includes a plurality of the recesses, each of whose bottoms contacts the contact portion. (19) The display device according to (17) or (18), wherein, when viewed from the side, the pixels in the pixel region and the structures in the contact region have the same vertical structure. (20) The display device according to (17) or (19), wherein, in a plan view, the recess in the contact region is provided so as to surround the structure. (21) An electronic device including a display device, wherein the display device includes: a pixel region provided with a plurality of pixels, a contact region adjacent to the pixel region and provided with a contact portion, and wiring extending from the pixel region to the contact region, wherein each of the plurality of pixels includes a light-emitting layer containing an organic material, and an anode electrode and a cathode electrode located on opposite sides of the light-emitting layer, the wiring connecting the anode electrode and the contact portion, and wherein, in the contact region, the wiring includes recesses whose bottoms are in contact with the contact portions.

[0176] REFERENCE SIGNS LIST 10 display device 11 pixel region 12 contact region 121 region 122 region 123 region 124 region 1 pixel 2 substrate 20 wiring 3 light-emitting portion 30 light-emitting layer 30m material 31 anode electrode 32 cathode electrode 32m material 4 contact portion 40 light-emitting layer structure 41 anode electrode structure 41a anode electrode structure 42 cathode electrode structure 5 protective material 51 first portion 52 second portion 5A protective material 5m material 6 wiring 60 recess 61 bottom portion 62 side wall portion 7 separation portion 8 structure 500 digital still camera 600 head-mounted display 710 television device 800 smartphone

Claims

1. A display device comprising: a pixel region provided with a plurality of pixels; a contact region adjacent to the pixel region and provided with a contact portion; and a wiring extending from the pixel region to the contact region, wherein each of the plurality of pixels includes a light-emitting layer containing an organic material, and an anode electrode and a cathode electrode positioned on opposite sides of the light-emitting layer, the wiring connects the anode electrode and the contact portion, and in the contact region, the wiring includes a recess having a bottom contacting the contact portion.

2. The display device according to claim 1, wherein when viewed in plan, the width of the contact region is 100 μm or less.

3. The display device according to claim 1, wherein in the contact region, the wiring includes a plurality of the recesses each having a bottom contacting the contact portion.

4. The display device according to claim 1, wherein in the pixel region, the wiring includes a recess having a bottom contacting the cathode electrode.

5. The light-emitting layer of each of the plurality of pixels is separated, the cathode electrode of each of the plurality of pixels is separated, and in the pixel region, the wiring includes a plurality of recesses each having a bottom contacting the cathode electrode of a corresponding pixel among the plurality of pixels.

6. The display device according to claim 5, wherein when viewed in side, the recess in the pixel region and the recess in the contact region have the same vertical structure.

7. The display device according to claim 6, wherein the vertical structure is defined by a bottom of the recess, a side wall portion of the recess, and a protective material provided to fill the recess.

8. The display device according to claim 5, wherein in the contact region, the wiring includes a plurality of the recesses each having a bottom contacting the contact portion, and when viewed in plan, a pattern of the plurality of recesses in the pixel region and a pattern of the plurality of recesses in the contact region are the same.

9. The display device according to claim 8, wherein when viewed in plan, an area ratio of the plurality of recesses in the pixel region to the entire pixel region is the same as an area ratio of the plurality of recesses in the contact region to the entire contact region.

10. The display device according to claim 8, wherein when viewed in plan view, the arrangement intervals of the plurality of concave portions in the pixel region are the same as the arrangement intervals of the plurality of concave portions in the contact region.

11. The display device according to claim 1, wherein the concave portion is formed as a via.

12. The display device according to claim 1, wherein when viewed in plan view, the concave portion in the contact region has a circular shape.

13. The display device according to claim 1, wherein when viewed in plan view, the concave portion in the contact region has a rectangular shape.

14. The display device according to claim 1, wherein when viewed in plan view, the concave portion in the contact region has a line shape.

15. The display device according to claim 1, wherein the wiring and the cathode electrode contain the same material.

16. The display device according to claim 1, wherein the wiring contains at least one of W, Al, Cu, TiN, TiO, tin oxide, aluminum zinc oxide, gallium zinc oxide, indium zinc oxide, IGZO, ITZO, CuI, InSbO4, ZnMgO, CuInO2, MgIn2O4, CdO, and ZnSnO3.

17. A plurality of structures are provided in the contact region. Each of the plurality of structures includes a light-emitting layer structure containing an organic material, and an anode electrode structure and a cathode electrode structure located on opposite sides of each other with the light-emitting layer structure interposed therebetween. The light-emitting layer structures of adjacent structures among the plurality of structures are separated from each other, the cathode electrode structures of adjacent structures among the plurality of structures are separated from each other, the anode electrode structures of the plurality of structures are commonly connected, and the contact portion is a portion located between adjacent structures of the anode electrode structures. The display device according to claim 1.

18. The display device according to claim 17, wherein in the contact region, the wiring includes a plurality of concave portions each of whose bottom contacts the contact portion.

19. The display device according to claim 17, wherein when viewed in side view, the pixel in the pixel region and the structure in the contact region have the same vertical structure.

20. The display device according to claim 17, wherein when viewed in a plan view, the recess in the contact region is provided so as to surround the structure.

21. An electronic device including a display device, wherein the display device includes: a pixel region provided with a plurality of pixels; a contact region adjacent to the pixel region and provided with a contact portion; and a wiring extending from the pixel region to the contact region, each of the plurality of pixels includes a light-emitting layer containing an organic material, and an anode electrode and a cathode electrode positioned on opposite sides of each other with the light-emitting layer interposed therebetween, the wiring connects the anode electrode and the contact portion, and in the contact region, the wiring includes a recess whose bottom contacts the contact portion.

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