Light emitting device and electronic apparatus

Abstract

Provided is a light emitting device comprising a substrate and a light emitting region comprising a plurality of light emitting elements arranged on the substrate, wherein: an optical system is provided above each of the plurality of light emitting elements to set the direction of the principal light axis of each of the plurality of light emitting elements in a desired direction; and the planar shape of each light emitting element differs depending on the position within the light emitting region.

Description

Light-emitting device and electronic device

[0001] The present disclosure relates to a light-emitting device and an electronic device.

[0002] Development of display devices (light-emitting devices) using organic electroluminescence (EL) elements as light-emitting elements is progressing. Such display devices have, for example, a plurality of pixels each composed of a lower electrode, a light-emitting layer stacked on the lower electrode, and an upper electrode stacked on the light-emitting layer. When a predetermined voltage is applied to the lower electrode and the upper electrode, the light-emitting layer sandwiched between the lower electrode and the upper electrode emits light. For example, the display device disclosed in the following patent document can be cited as an example of such a display device.

[0003] International Publication No. 2017 / 169563

[0004] In recent years, electronic devices have increasingly been equipped with display devices having relatively small display surfaces, such as head-mounted displays (HMDs) and electronic viewfinders (EVFs) for digital cameras. In such electronic devices, it is required to control the direction of light rays emitted from the display surface of the display device (light-emitting device) to a desired direction so that light rays are appropriately focused on the user's eyeball.

[0005] Therefore, the present disclosure proposes a new and improved light emitting device and electronic device that are capable of controlling the direction of light rays emitted from the light emitting device to a desired direction.

[0006] According to the present disclosure, there is provided a light emitting device comprising a substrate and a light emitting region consisting of a plurality of light emitting elements arranged on the substrate, wherein an optical system is provided above each of the plurality of light emitting elements for directing the direction of the principal light axis of each of the plurality of light emitting elements in a desired direction, and wherein the planar shape of each of the light emitting elements differs depending on its position within the light emitting region.

[0007] Furthermore, according to the present disclosure, there is provided an electronic device equipped with a light-emitting device, the light-emitting device comprising a substrate and a light-emitting region consisting of a plurality of light-emitting elements arranged on the substrate, an optical system is provided above each of the plurality of light-emitting elements for directing the direction of the principal light axis of each of the plurality of light-emitting elements in a desired direction, and the planar shape of each of the light-emitting elements differs depending on its position within the light-emitting region.

[0008] 4A is a schematic diagram illustrating an example of the overall configuration of a light-emitting device according to an embodiment of the present disclosure; FIG. 4B is a schematic circuit diagram illustrating a wiring relationship in a sub-pixel that is in the mth row and the nth column; FIG. 4C is a cross-sectional view illustrating an example of a pixel configuration according to an embodiment of the present disclosure; FIG. 4D is a plan view illustrating an example of a configuration of a light-emitting region according to a first embodiment of the present disclosure; FIG. 4E is an enlarged view of region C shown in FIG. 4A; FIG. 4F is an enlarged view of region E shown in FIG. 4A; FIG. 4G is a plan view (part 1) illustrating an example of a planar shape of a light-emitting element according to a first embodiment of the present disclosure; FIG. 4H is a plan view (part 2) illustrating an example of a planar shape of a light-emitting element according to a first embodiment of the present disclosure; FIG. 4I is a plan view (part 3) illustrating an example of a planar shape of a light-emitting element according to a first embodiment of the present disclosure; FIG. 4J is a cross-sectional view (part 1) illustrating an example of a configuration of a light-emitting element according to a second embodiment of the present disclosure; FIG. 4K is a cross-sectional view (part 2) illustrating an example of a configuration of a light-emitting element according to a second embodiment of the present disclosure; FIG. 4L is a plan view illustrating an example of a configuration of a light-emitting element according to a second embodiment of the present disclosure; FIG. 1 is a conceptual diagram (part 1) for explaining the relationship between a normal LN passing through the center of the light-emitting unit, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selection unit. FIG. 2 is a conceptual diagram (part 2) for explaining the relationship between a normal LN passing through the center of the light-emitting unit, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selection unit. FIG. 3 is a conceptual diagram (part 4) for explaining the relationship between a normal LN passing through the center of the light-emitting unit, a normal LN' passing through the center of the lens member, and a normal LN" passing through the center of the wavelength selection unit. 5 is a conceptual diagram (part 5) illustrating the relationship between the normal LN passing through the center of the light-emitting section, the normal LN' passing through the center of the lens member, and the normal LN" passing through the center of the wavelength selection section. FIG. 6 is a conceptual diagram (part 6) illustrating the relationship between the normal LN passing through the center of the light-emitting section, the normal LN' passing through the center of the lens member, and the normal LN" passing through the center of the wavelength selection section. FIG. 7 is a conceptual diagram (part 7) illustrating the relationship between the normal LN passing through the center of the light-emitting section, the normal LN' passing through the center of the lens member, and the normal LN" passing through the center of the wavelength selection section.1 is a schematic cross-sectional view illustrating a first example of a resonator structure; FIG. 2 is a schematic cross-sectional view illustrating a second example of a resonator structure; FIG. 3 is a schematic cross-sectional view illustrating a third example of a resonator structure; FIG. 4 is a schematic cross-sectional view illustrating a fourth example of a resonator structure; FIG. 5 is a schematic cross-sectional view illustrating a fifth example of a resonator structure; FIG. 6 is a schematic cross-sectional view illustrating a sixth example of a resonator structure; FIG. 7 is a schematic cross-sectional view illustrating a seventh example of a resonator structure; FIG. 8 is a front view showing an example of the appearance of a digital still camera; FIG. 9 is a rear view showing an example of the appearance of a digital still camera; FIG. 10 is an external view of a head-mounted display; FIG. 11 is an external view of a see-through head-mounted display; FIG. 12 is an external view of a television device; FIG. 13 is an external view of a smartphone; FIG. 14 is a diagram (part 1) showing the internal configuration of a car; FIG. 15 is a diagram (part 2) showing the internal configuration of a car.

[0009] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0010] The drawings referred to in the following description are for explaining and facilitating understanding of one embodiment of the present disclosure, and for the sake of clarity, the shapes, dimensions, ratios, etc. shown in the drawings may differ from the actual ones. Furthermore, the design of the devices shown in the drawings can be modified as appropriate, taking into consideration the following description and known technologies.

[0011] The description of specific shapes in the following description does not mean only geometrically defined shapes. In particular, the description of specific shapes in the following description also includes shapes that have allowable differences (errors and distortions) in light-emitting elements, light-emitting devices, their manufacturing processes, and their use and operation, as well as shapes similar to those shapes.

[0012] In the following description of circuits (electrical connections), unless otherwise specified, "electrically connected" means connecting multiple elements so that electricity (signals) is conducted between them. In addition, in the following description, "electrically connected" includes not only cases where multiple elements are directly and electrically connected, but also cases where elements are indirectly and electrically connected via other elements.

[0013] The description will be given in the following order: 1. Overall configuration of a light emitting device according to an embodiment of the present disclosure 2. Background leading to the creation of an embodiment of the present disclosure 3. First embodiment 4. Second embodiment 5. Summary 6. Modifications 6.1 Modification 1 6.2 Modification 2 7. Application example 8. Supplementary information

[0014] <<1. Overall Configuration of Light-Emitting Device According to Embodiment of the Present Disclosure>> An example of the overall configuration of an organic EL (Electro Luminescence) light-emitting device 10 (hereinafter simply referred to as "light-emitting device 10") according to an embodiment of the present disclosure, which is used as a display device or a lighting device, will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing an example of the overall configuration of the light-emitting device 10 according to an embodiment of the present disclosure.

[0015] The light-emitting device 10 is a device in which light-emitting elements such as OLEDs (organic light-emitting diodes) or micro-OLEDs are formed in an array. Such a light-emitting device 10 can be applied as a display device, for example, a display device for VR (virtual reality), MR (mixed reality), or AR (augmented reality), an electronic viewfinder (EVF), or a small projector. The light-emitting device 10 can also be applied to various lighting devices.

[0016] The light-emitting device 10 has a display region and a peripheral region provided around the periphery of the display region. As shown in Fig. 1, in the light-emitting region 20 of the light-emitting device 10, a plurality of pixels 100 are arranged in a matrix on a substrate 300.

[0017] Furthermore, in this embodiment, the smallest unit controlled during light emission control of the light emitting device 10 may be configured, for example, by combining three types of pixels 100 that emit different light (specifically, for example, sub-pixels that emit red light, sub-pixels that emit green light, and sub-pixels that emit blue light). Furthermore, in this embodiment, the number and arrangement of the three types of pixels 100 included in the smallest unit are not particularly limited. Furthermore, in this embodiment, one smallest unit is not limited to being configured by a plurality of pixels 100 that emit different light, as described above, but may also be configured by a plurality of pixels 100 that emit light of the same color.

[0018] As shown in FIG. 1, a horizontal drive circuit 11 and a vertical drive circuit 12 are provided in the peripheral region of the light emitting device 10 .

[0019] The horizontal drive circuit 11 scans the pixels 100 row by row (in FIG. 1, the direction extending along the X direction is called the row direction) when writing signals to the pixels 100, and writes signals to the scanning lines SCL ｍ The horizontal drive circuit 11 can be configured, for example, by a shift register or the like that shifts (transfers) a start pulse in sequence in synchronization with an input clock pulse.

[0020] The vertical drive circuit 12 also supplies a signal voltage corresponding to brightness information supplied from a signal supply source (not shown) to a signal line DTL ｎ 1, the direction extending along the Y direction is called the column direction) to the pixels 100 selected in column units via the line .

[0021] It should be noted that in the embodiment of the present disclosure, the configuration of the light emitting device 10 is not limited to the configuration shown in Fig. 1. In other words, the configuration shown in Fig. 1 is merely an example, and the light emitting device 10 according to the embodiment of the present disclosure can have various configurations.

[0022] Next, the circuit configuration of the pixel 100 in the mth row and nth column will be described with reference to Fig. 2. Fig. 2 is a schematic circuit diagram for explaining the wiring relationship in the pixel 100 in the mth row and nth column.

[0023] In the light emitting device 10, as described above, the pixel 100 including the light emitting element ELP is connected to the scanning line SCL extending in the row direction (the X direction in FIG. 1). ｍ and signal lines DTL extending in the column direction (Y direction in FIG. 1). ｎ The sensors are connected to each other and arranged in a two-dimensional matrix.

[0024] Furthermore, as shown in FIG. 2, the light emitting device 10 includes a power supply line PS1 that supplies a driving voltage to the pixel 100. ｍ and a common power supply line PS2 connected in common to all pixels 100. ｍ A predetermined driving voltage V is supplied from a power supply (not shown). ｃｃ etc. are supplied, and the common voltage V ｃａｔ (for example, ground potential) is supplied.

[0025] Here, the number of scanning lines SCL and the number of power supply lines PS1 are each M. The pixel 100 in the m-th row (where m=1, 2, . . . , P) is connected to the m-th scanning line SCL. ｍ , m-th power supply line PS1 ｍ , which constitute one display element row. ｍ and power supply line PS1 ｍ In addition, the number of signal lines DTL is assumed to be N. The pixel 100 in the nth column (where n=1, 2, . . . , N) has the nth signal line DTL ｎ In FIG. 2, the signal line DTL ｎ Hereinafter, the pixel 100 located in the mth row and nth column may be referred to as the (n, m)th pixel 100.

[0026] As described above, the light-emitting device 10 is sequentially scanned row by row by a scanning signal from the horizontal drive circuit 11. Specifically, in the light-emitting device 10, M pixels 100 arranged in the mth row are driven simultaneously. In other words, the timing of light emission / non-emission of M pixels 100 arranged along the row direction is controlled for each row to which they belong. For example, if the display frame rate of the light-emitting device 10 is FR (times / second), the scanning period per row (so-called horizontal scanning period) when the light-emitting device 10 is sequentially scanned row by row is less than (1 / FR) × (1 / P) seconds.

[0027] 2, the pixel 100 is composed of a light-emitting element ELP and a drive circuit for driving the light-emitting element ELP. The light-emitting element ELP is an organic electroluminescence light-emitting element. The drive circuit includes a write transistor TR Ｗ , and the driving transistor TR Ｄ , and the capacitance part C １ The driving transistor TR Ｄ When a current flows through the light emitting element ELP via the transistors, the light emitting element ELP can emit light. Each transistor is formed of, for example, a p-channel field effect transistor.

[0028] As shown in FIG. 2, in the pixel 100, the driving transistor TR Ｄ One of the source / drain regions is a capacitance portion C １ One end of the power supply line PS1 ｍ The other source / drain region is electrically connected to one end (specifically, the anode electrode) of the light-emitting element ELP. Ｄ The gate electrode of the write transistor TR Ｗ and the capacitance portion C １ is electrically connected to the other end of the

[0029] Also, as shown in FIG. 2, the write transistor TR ｗ One of the source / drain regions is connected to the signal line DTL ｎ and the write transistor TR ｗThe gate electrode of the scanning line SCL ｍ is electrically connected to

[0030] 2, the other end (specifically, the cathode electrode) of the light-emitting element ELP is electrically connected to a common power supply line PS2. ｃａｔ In FIG. 2, the capacitance of the light emitting element ELP is indicated by the symbol C ＥＬ It is expressed as:

[0031] An outline of driving the pixel 100 will be described. In the pixel 100, the signal line DTL ｎ In a state where a voltage corresponding to the brightness of an image to be displayed is supplied to the write transistor TR ｗ When the capacitor C is brought into a conductive state, １ A voltage according to the brightness is written to the write transistor TR ｗ After the capacitor C １ The driving transistor TR Ｄ When a current flows through the light emitting element ELP, the light emitting element ELP emits light.

[0032] In the embodiment of the present disclosure, the configuration of the drive circuit that controls the light emission of the light-emitting element ELP is not limited to the configuration shown in Fig. 2. Therefore, the configuration shown in Fig. 2 is merely an example, and various configurations can be used in the light-emitting device 10 according to the embodiment of the present disclosure.

[0033] Next, the configuration of the pixel 100 according to the embodiment of the present disclosure will be described with reference to Fig. 3. Fig. 3 is a cross-sectional view for explaining an example of the configuration of the pixel 100 according to the present embodiment, and more specifically, a cross-sectional view of the light-emitting element 200 of the pixel 100 cut in a direction perpendicular to the plane of the substrate 300.

[0034] 3, in the embodiment of the present disclosure, for example, pixel 100R can emit red light (for example, visible light having a wavelength of about 640 nm to 770 nm), pixel 100G can emit green light (for example, visible light having a wavelength of about 490 nm to 550 nm), and pixel 100B can emit blue light (for example, visible light having a wavelength of about 430 nm to 490 nm). Note that in this embodiment, pixel 100 may be a pixel that emits light other than red light, blue light, and green light.

[0035] Furthermore, as shown in FIG. 3 , the light-emitting element 200 of the pixel 100 has an anode electrode (first electrode) 202 provided on the substrate 300, a light-emitting layer 204 that is stacked on the anode electrode 202 and emits light, and a cathode electrode (second electrode) 206 that is stacked on the light-emitting layer 204 and transmits light from the light-emitting layer 204.

[0036] In particular, the substrate 300 can be formed from a glass substrate such as high strain point glass, soda glass, borosilicate glass, forsterite, lead glass, or quartz glass; a semiconductor substrate such as amorphous silicon or polycrystalline silicon; or a resin substrate such as polymethyl methacrylate, polyvinyl alcohol, polyvinyl phenol, polyethersulfone, polyimide, polycarbonate, polyethylene terephthalate, or polyethylene naphthalate.

[0037] The anode electrode 202 of the light-emitting element 200 may also function as a reflective layer. To enhance light extraction efficiency, it is preferable for the anode electrode 202 to be composed of a metal film with as high a reflectivity and as high a work function as possible. Examples of such metal films include metal films containing at least one of simple metal elements and alloys such as chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), molybdenum (Mo), titanium (Ti), tantalum (Ta), aluminum (Al), magnesium (Mg), iron (Fe), tungsten (W), and silver (Ag). Specific examples of the alloys include aluminum (Al) alloys such as AlNi alloys and AlCu alloys, and silver (Ag) alloys such as MgAg alloys. Furthermore, the anode electrode 202 may be formed from a transparent conductive film such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO). Furthermore, the anode electrode 202 may be a laminate film of two or more of the above-mentioned films.

[0038] Furthermore, in this embodiment, the anode electrode 202 may be connected to the anode electrode 202 of the adjacent light emitting element 200 .

[0039] The light-emitting layer 204 provided on the anode electrode 202 is made of an organic material or an inorganic material and is capable of emitting, for example, white light. The light-emitting layer 204 may include a hole injection layer (not shown) and a hole transport layer (not shown) provided adjacent to the anode electrode 202, and an electron transport layer (not shown) provided adjacent to the cathode electrode 206. In other words, the light-emitting layer 204 may have a structure in which, from the anode electrode 202 side, a hole injection layer, a hole transport layer, the light-emitting layer 204, and an electron transport layer (not shown) are stacked. The hole injection layer functions as a layer that increases the efficiency of hole injection into the light-emitting layer 204 and also functions as a buffer layer to suppress leakage. The hole transport layer functions as a layer that increases the efficiency of hole transport into the light-emitting layer 204. The light-emitting layer 204 can emit light by recombining electrons and holes when an electric field is generated. The electron transport layer functions as a layer that increases the efficiency of transporting electrons to the light-emitting layer 204. Furthermore, the light-emitting layer 204 may have an electron injection layer (not shown) between the electron transport layer and the cathode electrode 206. The electron injection layer functions as a layer that increases the efficiency of electron injection.

[0040] In this embodiment, the configuration of the light-emitting layer 204 is not limited to the configuration described above, and layers other than the hole injection layer and the light-emitting layer 204 can be provided as needed. Furthermore, in this embodiment, the light-emitting layer 204 may be configured to emit light of a color other than white light. For example, the light-emitting layer 204 may emit red light, green light, or blue light. Furthermore, in this embodiment, the light-emitting layers 204 of the light-emitting elements 200 of all pixels 100 may be formed to have the same structure or different structures, and are not particularly limited.

[0041] The cathode electrode 206 provided on the light-emitting layer 204 is a transparent electrode that is transparent to light generated in the light-emitting layer 204. In the following description, the term "transparent electrode" also includes semi-transparent electrodes. The cathode electrode 206 can be formed from a metal film containing at least one of a simple substance or alloy of a metal element such as aluminum (Al), magnesium (Mg), calcium (Ca), sodium (Na), or silver (Ag). Specific examples of alloys include aluminum (Al) alloys such as MgAg alloys or AlLi alloys, and silver (Ag) alloys. The cathode electrode 206 may also be formed from a transparent conductive film such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO). The cathode electrode 206 may also be a laminate film of two or more of the above-mentioned films.

[0042] Furthermore, in this embodiment, the cathode electrode 206 may be connected to the cathode electrode 206 of the adjacent light emitting element 200 .

[0043] Furthermore, in this embodiment, a protective film 210 that transmits light from the light-emitting layer 204 is laminated on the cathode electrode 206. More specifically, the protective film 210 is provided continuously on the cathode electrodes 206 of adjacent light-emitting elements 200. In other words, the protective film 210 is provided as a single layer that is common to each light-emitting element 200.

[0044] Furthermore, the protective film 210 is formed, for example, from a material with a high refractive index. The protective film 210 is preferably formed, for example, from a material with a refractive index of approximately 1.7 to 2.1 for light having a wavelength of approximately 450 nm at room temperature. Specifically, the protective film 210 can be formed, for example, from a nitride film such as silicon nitride (SiN), a transparent conductive film such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO), or a transparent organic film.

[0045] Furthermore, although not shown in the drawings, in this embodiment, the protective film 210 may be provided with a trench to separate adjacent light-emitting elements 200 (or pixels 100). Specifically, the trench may be located between adjacent light-emitting elements 200, and may be provided so as to penetrate partway through the thickness of the protective film 210 from the upper surface to the lower surface of the protective film 210 in a cross section (cross-sectional view) cut in a direction perpendicular to the plane of the substrate 300. Note that the lower surface of the protective film 210 here refers to the surface on the light-emitting element 200 side, and the upper surface of the protective film 210 refers to the surface opposite to the lower surface. In this embodiment, a protective film made of a low-refractive index film having a refractive index lower than that of the protective film 210 may be embedded in the trench. The protective film in the trench is preferably formed from a material having a refractive index that is different from that of the protective film 210 by, for example, 0.2 or less (refractive index difference). More specifically, the protective film in the trench may be formed from, for example, silicon oxide (SiO ２ ), aluminum oxide (Al ２ O ３ ) or a resin film.

[0046] Furthermore, in this embodiment, another protective film (not shown) may be provided so as to cover the upper surface of the protective film 410 .

[0047] In this embodiment, a color filter 302 and an on-chip lens 304 are provided for each pixel 100. In detail, as shown in Fig. 3 , in this embodiment, one on-chip lens 304 is provided above the light-emitting element 200 of one pixel 100, and one color filter 302 is provided between the protective film 210 and the on-chip lens 304.

[0048] Specifically, the color filter 302 can be formed from a color filter that transmits a red wavelength component, a color filter that transmits a green wavelength component, or a color filter that transmits a blue wavelength component. For example, the color filter 302 can be formed from a material with a refractive index of approximately 1.6 to 1.7, and specifically, for example, can be formed from a material in which a pigment or dye is dispersed in a transparent binder such as silicone. Furthermore, the on-chip lens 304 can be formed from a styrene-based resin, an acrylic-based resin, a styrene-acrylic copolymer-based resin, a siloxane-based resin, or the like. Note that in this embodiment, the color filter 302 does not necessarily have to be provided.

[0049] <<2. Background to the Creation of the Embodiments of the Present Disclosure>> Next, before describing the embodiments of the present disclosure, the background to the creation of the embodiments of the present disclosure by the inventors will be described.

[0050] As described above, in recent years, electronic devices have increasingly been equipped with display devices having relatively small display surfaces, such as HMDs and EVFs. In such electronic devices, there is a need to control the direction of light rays emitted from the display surface of the display device to a desired direction in order to properly focus the light rays on the user's eyeball. In other words, there is a need to control the angle of the chief ray axis (CRA: Chief Ray Angle) of the light-emitting element 200 in the light-emitting region 20 of the light-emitting device 10 to a desired direction.

[0051] In detail, in order to reduce the size and weight of electronic devices such as HMDs and EVFs, it is preferable to reduce the size of the optical system provided together with the light-emitting device 10 and to narrow the distance between the optical system and the light-emitting device 10. Therefore, it is conceivable to shorten the focal length and narrow the distance between the optical system and the light-emitting device 10 by suitably adjusting the angle of the chief ray axis of the light-emitting element 200 according to the position of the light-emitting element 200 within the light-emitting region 20 of the light-emitting device 10. In order to meet such demands, there has been a need for a means for controlling the direction of the chief ray axis to a desired direction in accordance with the optical system.

[0052] Therefore, the inventors have conceived the following embodiments of the present disclosure, believing that it is effective to control the direction of the chief ray axis in a desired direction by making the planar shape of each light-emitting element 200 asymmetrical depending on the position within the light-emitting region 20 of that light-emitting element 200. Details of the embodiments of the present disclosure conceived by the inventors will be described below in order.

[0053] 3. First Embodiment First, the configuration of light-emitting region 20 according to the first embodiment of the present disclosure will be described with reference to Fig. 4A to Fig. 4C. Fig. 4A is a plan view (plan view) for describing an example of the configuration of light-emitting region 20 according to the first embodiment of the present disclosure, Fig. 4B is an enlarged view of region C shown in Fig. 4A, and Fig. 4C is an enlarged view of region E shown in Fig. 4A.

[0054] In this embodiment, as shown in Fig. 4A , the planar shape of the light-emitting element 200 located in the central portion (region C) (first region) including the center point O of the light-emitting region 20 is symmetrical with respect to a horizontal axis X extending along the lateral direction of the light-emitting region 20 and a vertical axis Y extending along the longitudinal direction of the light-emitting region 20. In particular, as shown in Fig. 4B , the planar shape of the light-emitting element 200 located in region C is line-symmetrical with respect to the horizontal axis X as the axis of symmetry, and is also line-symmetrical with respect to the vertical axis Y as the axis of symmetry. In this embodiment, the direction of the chief light axis of the pixel 100 located in the central portion (region C) of the light-emitting region 20 is approximately perpendicular to the plane of the light-emitting region 20.

[0055] In this embodiment, as shown in FIG. 4A , the planar shape of the light-emitting element 200 located in the outer periphery of the light-emitting region 20 (e.g., region E or region R) (second region) is asymmetric with respect to at least one of a horizontal axis X extending along the lateral direction of the light-emitting region 20 and a vertical axis Y extending along the longitudinal direction of the light-emitting region 20. For example, the planar shape of the light-emitting element 200 located in region E is line-symmetric with respect to the horizontal axis X, but is asymmetric when the vertical axis Y is used as the axis of symmetry. Furthermore, for example, the planar shape of the light-emitting element 200 located in region R is asymmetric both when the horizontal axis X is used as the axis of symmetry and when the vertical axis Y is used as the axis of symmetry. In particular, as shown in FIG. 4C , the planar shape of the light-emitting element 200 located in region E is line-symmetric with respect to the horizontal axis X, but is asymmetric when the vertical axis Y is used as the axis of symmetry. Furthermore, the shape of the light-emitting element 200 located in region E is such that the area is larger on the left side of the figure along the horizontal axis X than on the right side. In this case, the chief ray axis of the light-emitting element 200 intersects at an oblique angle with a perpendicular line to the plane of the light-emitting region 20, and more specifically, is tilted to the left side of the figure with respect to the perpendicular line. That is, in the example shown in FIG. 4C , the direction of the chief ray axis is controlled to the desired direction by forming an asymmetric shape in which most of the planar area of ​​the light-emitting element 200 extends in the direction in which the chief ray axis is to be tilted (desired direction). As described above, according to this embodiment, the direction of the chief ray axis of the pixel 100 can be controlled to the desired direction by changing the shape of the light-emitting element 200.

[0056] Further, details of the planar shape of the light emitting device 200 according to this embodiment will be described with reference to Figures 5A and 5B. Figures 5A and 5B are plan views for explaining an example of the planar shape of the light emitting device 200 according to this embodiment.

[0057] In this embodiment, as shown on the left side of FIG. 5A, in the circular light emitting element 200 located in the central part (region C) (first region) of the light emitting region 20, the center point O, which is the midpoint of the length in the vertical direction and the length in the horizontal direction of the light emitting element 200, is ｃ and the center of gravity O of the planar shape of the light emitting element 200 ｇThat is, in the light emitting element 200 located in the central portion (region C) (first region) of the light emitting region 20, the shape of the light emitting element 200 is symmetrical.

[0058] On the other hand, in this embodiment, as shown on the right side of FIG. 5A, for the light emitting element 200 located in the outer periphery (second region) of the light emitting region 20, the center point O ｃ and the center of gravity O of the planar shape of the light emitting element 200 ｇ (not shown) does not coincide with the center point O. In other words, the light emitting element 200 located in the outer periphery (second region) of the light emitting region 20 has an asymmetric shape. ｃ Center of gravity O ｇ The direction of the positional deviation is the direction of the inclination of the principal ray axis of the light emitting element 200 with respect to the perpendicular to the plane of the light emitting region 20 .

[0059] In the above description, the planar shape of the light-emitting element 200 located in the center (region C) of the light-emitting region 20 is symmetrical, and the planar shape of the light-emitting element 200 located in the peripheral region of the light-emitting region 20 is asymmetrical; however, this embodiment is not limited to this. In this embodiment, depending on the characteristics required of the light-emitting device 10, for example, the planar shape of the light-emitting element 200 located in the center (region C) of the light-emitting region 20 may be asymmetrical, and the planar shape of the light-emitting element 200 located in the peripheral region of the light-emitting region 20 may be symmetrical. Also, in this embodiment, for example, the planar shape of the light-emitting element 200 located in a predetermined region of the light-emitting region 20 may be symmetrical, and the planar shape of the light-emitting element 200 located in a region of the light-emitting region 20 other than the predetermined region may be asymmetrical.

[0060] Furthermore, in this embodiment, for example, if the planar shape of the light-emitting element 200 located in the center (region C) of the light-emitting region 20 is circular as shown on the left side of FIG. 5A , the planar shape of the light-emitting element 200 located in the outer periphery of the light-emitting region 20 can be teardrop-shaped as shown on the right side of FIG. 5A . By doing so, in this embodiment, the planar shape of the light-emitting element 200 located in the center (region C) of the light-emitting region 20 becomes symmetrical with respect to a horizontal axis X extending along the lateral direction of the light-emitting region 20 and a vertical axis Y extending along the longitudinal direction of the light-emitting region 20. On the other hand, the planar shape of the light-emitting element 200 located in the outer periphery of the light-emitting region 20 becomes asymmetric with respect to at least one of the horizontal axis X extending along the lateral direction of the light-emitting region 20 and the vertical axis Y extending along the longitudinal direction of the light-emitting region 20. Furthermore, by doing so, the areas of the light-emitting elements 200 in the light-emitting region 20 of the light-emitting device 10 can be made approximately the same.

[0061] 5A , the diameter of circular light-emitting element 200 located in the center (region C) of light-emitting region 20 is defined as Φ. That is, circular light-emitting element 200 located in the center (region C) of light-emitting region 20 is inscribed in square 340 having a side the same length as diameter Φ.

[0062] 5A shows a trapezoid 354 having a height equal to the diameter Φ and an area equal to the square 340. In this embodiment, the planar shape of the light-emitting elements 200 located on the periphery of the light-emitting region 20 is teardrop-shaped so as to be inscribed in the trapezoid 354, thereby making it possible to make the areas of the light-emitting elements 200 in the light-emitting region 20 of the light-emitting device 10 approximately the same. As a result, in this embodiment, the brightness in the light-emitting region 20 of the light-emitting device 10 can be made approximately uniform without causing a decrease in brightness in a specific region of the light-emitting region 20.

[0063] 5A , the shape of the trapezoid 354 can be defined by placing right-angled triangles 352 (with a base length of 2d) each having a height the same as the diameter Φ at the top and bottom of a rectangle 350 having a horizontal side the same length as the diameter Φ, and removing the two right-angled triangles 352 from the rectangle 350. Therefore, by gradually changing the length of d to keep the area constant and gradually changing the shape of the trapezoid 354, a teardrop shape inscribed in each trapezoid 354 can be obtained, thereby obtaining a light-emitting element 200 with a variable shape.

[0064] 5B shows the planar shape of the light-emitting element 200 when the length d is changed stepwise from 0 nm to 40 nm, 80 nm, 120 nm, and 160 nm, assuming that the diameter Φ is 1 μm. In this embodiment, the planar shape of the light-emitting element 200 may be gradually changed in this manner to gradually increase the asymmetry.

[0065] In this embodiment, for example, the planar shape of the light emitting element 200 may be changed according to the relative distance between the light emitting element 200 and the center point O (predetermined point) of the light emitting region 20. In this case, for example, as the relative distance between the light emitting element 200 and the center point O of the light emitting region 20 becomes longer, the center point O, which is the midpoint of the length in the vertical direction and the length in the horizontal direction of the light emitting element 200, becomes closer to the center point O. ｃ and the center of gravity O of the planar shape of the light emitting element 200 ｇThe distance between the light emitting element 200 and the center point O may be longer. In other words, in this embodiment, for example, the asymmetry of the planar shape of the light emitting element 200 may gradually increase as the outer edge of the light emitting element 200 approaches the outer edge of the light emitting region 20. By doing so, the direction of the chief ray axis of the light emitting element 200 at each position in the light emitting region 20 can be controlled so that light from the light emitting device 10 spreads outward from the center point O of the light emitting region 20, as shown in FIG. 4A . In other words, in this embodiment, the area of ​​each light emitting element 200 in the light emitting region 20 of the light emitting device 10 is kept the same, while the planar shape of each light emitting element 200 is changed depending on the position within the light emitting region 20. More specifically, for example, the planar shape of each light emitting element 200 is made asymmetric depending on the position within the light emitting region 20. In this way, in this embodiment, the direction of the chief ray axis of each light emitting element 200 can be controlled in a desired direction.

[0066] Note that this embodiment is not limited to controlling the direction of the chief ray axis of the light emitting element 200 at each position in the light emitting region 20 so that the light from the light emitting device 10 spreads outward from the center point O of the light emitting region 20. In this embodiment, for example, the direction of the chief ray axis of the light emitting element 200 at each position in the light emitting region 20 may be controlled so that the light from the light emitting device 10 converges from the outer periphery of the light emitting region 20 toward the center point O. That is, in this embodiment, for example, the planar shape of the light emitting element 200 may be gradually changed according to the relative distance between the light emitting element 200 and a predetermined point in the light emitting region 20. In this case, the center point O, which is the midpoint of the vertical length and horizontal length of the light emitting element 200, may be gradually changed according to the relative distance. ｃ and the center of gravity O of the planar shape of the light emitting element 200 ｇ The distance between the light emitting element 200 and the light emitting device 200 changes, and the asymmetry or symmetry of the planar shape of the light emitting element 200 changes.

[0067] In the examples described so far, the light-emitting elements 200 emitting light of different colors have the same shape and size as long as they are located at approximately the same position within the light-emitting region 20. However, this embodiment is not limited to such a configuration. In this embodiment, for example, even if they are located at approximately the same position within the light-emitting region 20, the light-emitting elements 200 emitting light of different colors may have different shapes and areas.

[0068] In addition, in this embodiment, the planar shape of each light-emitting element 200 is not limited to a circular shape or a teardrop shape as shown in Figures 4A to 5B. Therefore, other shapes of the light-emitting element 200 will be described with reference to Figure 6. Figure 6 is a plan view for explaining an example of the planar shape of the light-emitting element 200 according to this embodiment.

[0069] For example, the left side of FIG. 6 shows a teardrop shape as the planar shape of the light-emitting element 200 located on the periphery of the light-emitting region 20. Furthermore, the second image from the left in FIG. 6 shows a stepped shape formed by turning a T sideways as the planar shape of the light-emitting element 200 located on the periphery of the light-emitting region 20. The third image from the left in FIG. 6 shows a multi-step stepped shape as the planar shape of the light-emitting element 200. The fourth image from the left in FIG. 6 shows a trapezoidal shape as the planar shape of the light-emitting element 200. The right side of FIG. 6 shows an asymmetrical hexagonal shape as the planar shape of the light-emitting element 200 located on the periphery of the light-emitting region 20. That is, in this embodiment, the planar shape of the light-emitting element 200 may be, for example, a polygonal shape.

[0070] Furthermore, in this embodiment, the planar shape of the light-emitting element 200 can be adjusted as follows. Hereinafter, means for adjusting the planar shape of the light-emitting element 200 will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram for explaining an example of the configuration of the light-emitting element 200 according to this embodiment. In detail, the top row of FIG. 7 shows a plan view of the light-emitting element 200, and the second to fourth rows from the top of FIG. 7 show cross-sectional views of the light-emitting element 200 corresponding to the plan view in the top row.

[0071] In this embodiment, for example, as shown in the second row from the top in FIG. 7, the planar shape of the light emitting element 200 can be adjusted by the shape of the anode electrode 202 .

[0072] Furthermore, in this embodiment, the outer periphery of the anode electrode 202 may be covered with an inter-pixel insulating portion 208, and the central region of the anode electrode 202 exposed from the opening (pixel opening) of the inter-pixel insulating portion 208 functions as an electrode. In other words, the inter-pixel insulating portion 208 can define the light-emitting region by the pixel opening. Therefore, in this embodiment, for example, as shown in the third row from the top of FIG. 7, the planar shape of the light-emitting element 200 can be adjusted by the shape of the anode electrode 202 exposed from the opening of the inter-pixel insulating portion 208. Furthermore, in this embodiment, by providing such an inter-pixel insulating portion 208, current leakage between adjacent light-emitting elements 200 can be suppressed. The inter-pixel insulating portion 208 can be made of, for example, silicon oxide (SiO ２ ), silicon nitride (Si ３ N ４ ), or an inorganic insulating film such as silicon oxynitride (SiON), or an organic insulating film such as a polyimide resin, an acrylic resin, or a novolac resin.

[0073] Furthermore, in this embodiment, for example, as shown in the fourth row from the top of FIG. 7, the planar shape of the light emitting element 200 can be adjusted by the shapes of the light emitting layer 204 and the cathode electrode 206 .

[0074] Furthermore, in this embodiment, an optical system is provided above the light emitting element 200 of the pixel 100 to direct the direction of the principal light axis of the pixel 100 in a desired direction. In this embodiment, examples of such an optical system include a color filter 302 that transmits light having a predetermined wavelength, an on-chip lens 304 that refracts light from the light emitting element 200, and a film (not shown) that refracts light from the light emitting element 200, as shown in FIG.

[0075] In this embodiment, when the light emitting region 20 is viewed from above (in a plan view), for example, in the light emitting element 200 located in the center (region C) of the light emitting region 20, the center point C of the light emitting element 200 Ｅ and the center point C of the color filter 302 Ｆ On the other hand, in the light emitting element 200 located on the periphery of the light emitting region 20, the center point C Ｅ and the center point C of the color filter 302 Ｆ Specifically, in this embodiment, for example, the center point C of the light emitting element 200 is arranged so as not to overlap with the center point C of the light emitting element 200 depending on the position in the light emitting region 20 of the light emitting element 200. Ｅ and the center point C of the color filter 302 Ｆ Furthermore, in this embodiment, for example, the distance between the center point C of the light emitting element 200 and a predetermined point in the light emitting region 20 may be changed depending on the relative distance between the light emitting element 200 and the predetermined point in the light emitting region 20. Ｅ and the center point C of the color filter 302 Ｆ The distance between the

[0076] Furthermore, in this embodiment, for example, when the light emitting region 20 is viewed from above (in a plan view), the center of gravity O ｇ and the center point C of the color filter 302 Ｆ The positions may be arranged so that they coincide with each other.

[0077] In this embodiment, by doing so, the light from the light emitting element 200 is blocked by the color filter 302, and the direction of the principal ray axis can be controlled to a desired direction with high precision.

[0078] In the above description, in the light emitting element 200 located on the outer periphery of the light emitting region 20, the center point C Ｅ and the center point C of the color filter 302 Ｆ In this embodiment, the light emitting elements 200 are arranged so as not to overlap with the center point C of the light emitting element 200, but this is not limited to this. Ｅ and the center point C of the color filter 302Ｆ Furthermore, in the light emitting element 200 located in an area other than the predetermined area of ​​the light emitting region 20, the center point C Ｅ and the center point C of the color filter 302 Ｆ It does not have to overlap with.

[0079] In this embodiment, when the light emitting region 20 is viewed from above (in a plan view), for example, in the light emitting element 200 located in the center (region C) of the light emitting region 20, the center point C of the light emitting element 200 Ｅ and the center point C of the on-chip lens 304 Ｌ On the other hand, in the light emitting element 200 located on the periphery of the light emitting region 20, the center point C Ｅ and the center point C of the on-chip lens 304 Ｌ Specifically, in this embodiment, for example, the center point C of the light emitting element 200 is arranged so as not to overlap with the center point C of the light emitting element 200 depending on the position in the light emitting region 20 of the light emitting element 200. Ｅ and the center point C of the on-chip lens 304 Ｌ Furthermore, in this embodiment, for example, the distance between the center point C of the light emitting element 200 and a predetermined point in the light emitting region 20 may be changed depending on the relative distance between the light emitting element 200 and the predetermined point in the light emitting region 20. Ｅ and the center point C of the on-chip lens 304 Ｌ The distance between the

[0080] Furthermore, in this embodiment, for example, when the light emitting region 20 is viewed from above (in a plan view), the center of gravity O ｇ and the center point C of the on-chip lens 304 Ｌ The positions may be arranged so that they coincide with each other.

[0081] In this embodiment, by doing so, the light from the light emitting element 200 is refracted by the on-chip lens 304, and the direction of the principal ray axis can be controlled to a desired direction with high precision.

[0082] In the above description, in the light emitting element 200 located on the outer periphery of the light emitting region 20, the center point C Ｅand the center point C of the on-chip lens 304 Ｌ In this embodiment, the light emitting elements 200 are arranged so as not to overlap with the center point C of the light emitting element 200, but this is not limited to this. Ｅ and the center point C of the on-chip lens 304 Ｌ Furthermore, in the light emitting element 200 located in an area other than the predetermined area of ​​the light emitting region 20, the center point C Ｅ and the center point C of the on-chip lens 304 Ｌ It does not have to overlap with.

[0083] In this embodiment, the color filter 302 and the on-chip lens 304 may have a uniform shape and size within the light-emitting region 20, or may have a non-uniform shape and size within the light-emitting region 20. In this embodiment, for example, the shape or size of the color filter 302 or the on-chip lens 304 may be changed depending on the position within the light-emitting region 20, or the shape or size of the color filter 302 or the on-chip lens 304 may be changed depending on the color of light emitted by the pixel 100.

[0084] As described above, in this embodiment, the direction of the principal ray axis can be controlled accurately to a desired direction without causing a drop or deterioration in brightness in a predetermined region of the light-emitting region 20 .

[0085] It should be noted that this embodiment is not limited to the configurations shown in FIGS. 4A to 7.

[0086] <<4. Second Embodiment>> In the above-described first embodiment, the connection of the cathode electrodes 206 of adjacent light-emitting elements 200 was not considered. Therefore, in a second embodiment of the present disclosure, details of the connection of the cathode electrodes 206 of adjacent light-emitting elements 200 will be described with reference to Figures 8A and 8B. Figures 8A and 8B are cross-sectional views for explaining an example of the configuration of the light-emitting element 200 according to this embodiment.

[0087] Specifically, as shown in FIG. 8A , in this embodiment, a contact hole 230 exposing a portion of the upper surface of the cathode electrode 206 is provided in the protective film 210. Furthermore, a wiring (first wiring) 212 is provided so as to cover at least a portion of the side surface of the contact hole 230. The wiring 212 is electrically connected to the upper surface of the cathode electrode 206 exposed through the contact hole 230. Therefore, the wiring 212 can electrically connect the cathode electrodes 206 of adjacent light-emitting elements 200 to each other. The wiring 212 can be formed from a transparent conductive film made of, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or the like. Furthermore, in this embodiment, as shown in FIG. 8A , the protective film 210 or a protective film (not shown) made of a different material from the protective film 210 may be embedded in the contact hole 230 so as to cover the wiring 212 on the side surface of the contact hole 230. In the latter case, the protective film filled in the contact hole 230 may be made of a material having a higher refractive index than the protective film 210 .

[0088] 8B , in this embodiment, a protective film 220 that transmits light from the light-emitting layer 204 is sequentially laminated on the cathode electrode 206. The protective film 220 is preferably formed from a material that has a refractive index of approximately 1.7 to 2.1 for light having a wavelength of approximately 450 nm at room temperature. Specifically, the protective film 220 can be formed from, for example, a nitride film such as silicon nitride (SiN), a transparent conductive film such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO), or a transparent organic film.

[0089] 8B , the outer periphery of the upper surface of the cathode electrode 206 is exposed from the protective film 220, and the exposed outer periphery is electrically connected to a wiring (second wiring) 214 covering the side surface of the protective film 220. Furthermore, the wiring 214 is electrically connected to a wiring 212 covering the upper surface of the protective film 220. The wiring 214 can be formed from a transparent conductive film made of, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or the like. In this embodiment, by doing so, the wiring 214 and the wiring 212 extending between the adjacent light-emitting elements 200 can electrically connect the cathode electrodes 206 of the adjacent light-emitting elements 200 to each other.

[0090] Furthermore, in this embodiment, since the protective film 210 or the like is not formed inside the contact hole 432, it is not necessary to pay attention to the coverage of the protective film 210 or the like, and it is possible to easily form the pixel 100 having a desired configuration. As a result, according to this embodiment, it is possible to improve the reliability of the light-emitting device 10.

[0091] The light emitting element 200 according to the present embodiment described above can be modified in various ways with respect to its shape when viewed from above the substrate 300 (in a plan view). Therefore, with reference to FIG. 9 , modifications to the planar configuration of the light emitting element 200 will be described. FIG. 9 is a plan view for explaining an example of the configuration of the light emitting element 200 according to the present embodiment. Note that FIG. 9 illustrates the light emitting element 200 located in the center (area C) of the light emitting region 20.

[0092] In this embodiment, the shape of the light-emitting elements 200 when viewed from above the substrate 300 (in a plan view) may be, for example, a hexagonal polygonal shape, and is not particularly limited. Also, in this embodiment, the arrangement of the light-emitting elements 200 may be, for example, a delta arrangement (specifically, the light-emitting elements 200 are located at the vertices of a triangle) or a square arrangement (specifically, the light-emitting elements 200 are located at the vertices of a square), and is not particularly limited.

[0093] For example, as shown on the left side of FIG. 9 , hexagonal light-emitting elements 200 may be arranged in a delta configuration. In this example, each light-emitting element 200 is completely separated. In this case, as described with reference to FIG. 8A , for example, a contact hole 130 exposing a portion of the upper surface of the cathode electrode 206 is provided in the center of each light-emitting element 200, and a wiring 212 (not shown) is provided so as to cover at least a portion of the side surface of the contact hole 230. The wiring 212 is electrically connected to the upper surface of the cathode electrode 206 exposed from the contact hole 230. Therefore, the wiring 212 can electrically connect the cathode electrodes 206 of adjacent light-emitting elements 200 to each other.

[0094] For example, as shown in the center of FIG. 9 , hexagonal light-emitting elements 200 may be arranged in a delta configuration. In this example, each light-emitting element 200 is completely separated. In this case, as described with reference to FIG. 8B , for example, a protective film 220 (not shown) is provided on each light-emitting element 200, and the outer periphery of the upper surface of the cathode electrode 206 is exposed from the protective film 220. The exposed outer periphery is electrically connected to wiring 214 (not shown) covering the side surface of the protective film 220. Furthermore, the wiring 214 is electrically connected to wiring 212 covering the upper surface of the protective film 220. In this embodiment, by doing so, the cathode electrodes 206 of adjacent light-emitting elements 200 can be electrically connected to each other by the wiring 214 and wiring 212 extending between the adjacent light-emitting elements 200.

[0095] 9, the cathode electrode 206 and the light-emitting layer 204 of each light-emitting element 200 are connected to a part of the cathode electrode 206 and a part of the light-emitting layer 204 of the light-emitting element 200 adjacent to each other in the horizontal direction in the figure. In this way, in the example on the right side of Fig. 9, the cathode electrodes 206 are partially connected to each other, so there is no need to provide the above-mentioned wiring 212, 214, etc. Furthermore, in the example on the right side of Fig. 9, the electrical resistance of the cathode electrode 206 can be reduced.

[0096] It should be noted that this embodiment is not limited to the configurations shown in FIGS. 8A to 9.

[0097] <<5. Summary>> As described above, in the embodiment of the present disclosure, the direction of the chief ray axis can be accurately controlled to a desired direction without causing a decrease or degradation in luminance in a predetermined region of the light-emitting region 20.

[0098] Furthermore, the light emitting device 10 according to the embodiment of the present disclosure can be applied to, for example, a display device for VR (Virtual Reality), MR (Mixed Reality), or AR (Augmented Reality), a display device such as a smartphone or a television device, an electronic viewfinder (EVF), a small projector, etc. The light emitting device 10 can also be applied to various lighting devices.

[0099] Furthermore, the light emitting device 10 according to the embodiment of the present disclosure can be manufactured using methods, devices, and conditions that are used in the manufacture of general semiconductor devices. That is, the light emitting device 10 according to the present embodiment can be manufactured using existing semiconductor device manufacturing methods.

[0100] Examples of the above-mentioned method include a PVD (Physical Vapor Deposition) method, a CVD (Chemical Vapor Deposition) method, and an ALD (Atomic Layer Deposition) method. Examples of PVD methods include vacuum deposition, EB (electron beam) deposition, various sputtering methods (magnetron sputtering, RF (radio frequency)-DC (direct current) combined bias sputtering, ECR (electron cyclotron resonance) sputtering, facing target sputtering, high frequency sputtering, etc.), ion plating, laser ablation, molecular beam epitaxy (MBE), and laser transfer. Examples of CVD methods include plasma CVD, thermal CVD, metal organic (MO) CVD, and photo CVD. Other methods include electroplating, electroless plating, spin coating, dipping, casting, microcontact printing, drop casting, various printing methods such as screen printing, inkjet printing, offset printing, gravure printing, and flexographic printing, stamping, spraying, and various coating methods such as air doctor coater, blade coater, rod coater, knife coater, squeeze coater, reverse roll coater, transfer roll coater, gravure coater, kiss coater, cast coater, spray coater, slit orifice coater, and calendar coater. Furthermore, patterning methods include chemical etching such as shadow mask, laser transfer, and photolithography, and physical etching using ultraviolet light or laser. Additionally, planarization techniques include CMP (Chemical Mechanical Polishing), laser planarization, and reflow.

[0101] <<6. Modifications>> <6.1 Modification 1> Next, as a modification of the embodiment of the present disclosure, with reference to FIGS. 10A to 10G , a modification of the relationship between the normal LN passing through the center of the pixel 100 (more specifically, the center of the plurality of light-emitting elements 200 included in one pixel 100), the normal LN′ passing through the center of the lens member (more specifically, the on-chip lens 304), and the normal LN″ passing through the center of the wavelength selection unit (more specifically, the color filter 302) will be described. FIGS. 10A to 10G are conceptual diagrams for explaining the relationship between the normal LN passing through the center of the light-emitting unit, the normal LN′ passing through the center of the lens member, and the normal LN″ passing through the center of the wavelength selection unit. In the following description, the center of the pixel 100 will be referred to as the center of the light-emitting unit.

[0102] In an embodiment of the present disclosure, the size of the wavelength selection section (e.g., color filter 302) may be changed as appropriate in accordance with the light emitted by the pixel 100. Furthermore, when a light absorption layer (black matrix layer) is provided between the wavelength selection sections (e.g., color filters 302) of adjacent pixels 100, the size of the light absorption layer (black matrix layer) may be changed as appropriate in accordance with the light emitted by the pixel 100. Furthermore, the size of the wavelength selection section (e.g., color filter 302) may be adjusted by adjusting the distance (offset amount) d between the normal line passing through the center of the pixel 100 and the normal line passing through the center of the color filter 302. ０ The planar shape of the wavelength selection unit (e.g., the color filter 302) may be the same as, similar to, or different from the planar shape of the lens member (e.g., the on-chip lens 304).

[0103] For example, as shown in FIG. 10A, 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).

[0104] Also, for example, as shown in FIG. 10B, 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.

[0105] Also, for example, as shown in FIG. 10C, 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 with each other, 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 with each other. In other words, D ０ = d ０ >0.

[0106] Also, for example, as shown in FIG. 10D, 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 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 square in FIG. 10D) is located on a straight line LL connecting the center of the light-emitting section and the center of the lens member (shown by a black circle in FIG. 10D). Specifically, the distance from the center of the light-emitting section to the center of the wavelength selection section in the thickness direction is 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.

[0107] 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. 10E, 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.

[0108] Also, for example, as shown in FIG. 10F, 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.

[0109] Furthermore, as shown in the conceptual diagram of FIG. 10G, 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 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 is located on a straight line LL connecting the center of the light-emitting section and the center of the lens member. Specifically, the distance from the center of the light-emitting section in the thickness direction to the center of the wavelength selection section (shown by a black square in FIG. 10G) is LL. １ , the distance from the center of the wavelength selection portion in the thickness direction to the center of the lens member (shown by a black circle in FIG. 10G) 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.

[0110] 6.2 Modification 2 The pixel 100 (specifically, the light-emitting element 200) used in the light-emitting device according to the embodiment of the present disclosure described above may be configured to include a resonator structure that resonates light generated in the light-emitting layer 204. Hereinafter, the resonator structure will be described with reference to FIGS. 11 to 17 . FIG. 11 is a schematic cross-sectional view illustrating a first example of the resonator structure, FIG. 12 is a schematic cross-sectional view illustrating a second example of the resonator structure, and FIG. 13 is a schematic cross-sectional view illustrating a third example of the resonator structure. Furthermore, FIG. 14 is a schematic cross-sectional view illustrating a fourth example of the resonator structure, and FIG. 15 is a schematic cross-sectional view illustrating a fifth example of the resonator structure. Furthermore, FIG. 16 is a schematic cross-sectional view illustrating a sixth example of the resonator structure, and FIG. 17 is a schematic cross-sectional view illustrating a seventh example of the resonator structure.

[0111] (Resonator Structure: First Example) Fig. 11 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) 202 is formed to have a common film thickness in each pixel 100. The same is true for the second electrode (e.g., cathode electrode) 206.

[0112] 11 , a reflector 401 is disposed below the first electrode 202 of the pixel 100, with an optical adjustment layer 402 sandwiched therebetween. A resonator structure is formed between the reflector 401 and the second electrode 206, which resonates light generated by the organic layer (more specifically, the light-emitting layer) 204.

[0113] The reflector 401 is formed to have a common film thickness in each pixel 100. The film thickness of the optical adjustment layer 402 varies depending on the color to be displayed by the pixel 100. By having the optical adjustment layers 402R, 402G, and 402B have different film 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.

[0114] 11 , the reflectors 401 in the pixels 100R, 100G, and 100B are arranged so that their upper surfaces are aligned. As described above, the film thickness of the optical adjustment layer 402 differs depending on the color to be displayed by the pixel 100, and therefore the position of the upper surface of the second electrode 206 differs depending on the type of pixel 100R, 100G, and 100B.

[0115] The reflector 401 can be formed using, for example, a metal such as aluminum (Al), silver (Ag), or copper (Cu), or an alloy containing these as a main component.

[0116] The optical adjustment layer 402 can be made of inorganic insulating materials such as silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiOxNy), or organic resin materials such as acrylic resins and polyimide resins. The optical adjustment layer 402 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 pixel 100.

[0117] The first electrode 202 can be formed using a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).

[0118] The second electrode 206 preferably functions as a semi-transmissive reflective film. The second electrode 206 can be formed using magnesium (Mg) or silver (Ag), a magnesium-silver alloy (MgAg) containing these as main components, or an alloy containing an alkali metal or an alkaline earth metal.

[0119] 12 is a schematic cross-sectional view illustrating a second example of the resonator structure. In the second example, the first electrode 202 and the second electrode 206 are formed to have the same film thickness in each pixel 100.

[0120] Also in the second example, a reflector 401 is disposed below the first electrode 202 of the pixel 100, with an optical adjustment layer 402 sandwiched therebetween. A resonator structure that resonates light generated by the organic layer 204 is formed between the reflector 401 and the second electrode 206. As in the first example, the reflector 401 is formed to have a common film thickness in each pixel 100, and the film thickness of the optical adjustment layer 402 differs depending on the color that the pixel 100 is to display.

[0121] In the first example shown in Figure 11, the upper surfaces of the reflectors 401 in the pixels 100R, 100G, and 100B are arranged to be aligned, and the position of the upper surface of the second electrode 206 differs depending on the type of pixel 100R, 100G, and 100B.

[0122] 12 , the upper surfaces of the second electrodes 206 are aligned in the pixels 100R, 100G, and 100B. To align the upper surfaces of the second electrodes 206, the upper surfaces of the reflectors 401 in the pixels 100R, 100G, and 100B are aligned differently depending on the type of pixel 100R, 100G, and 100B. Therefore, the lower surface of the reflector 401 has a stepped shape that corresponds to the type of pixel 100R, 100G, and 100B.

[0123] The materials constituting the reflector 401, the optical adjustment layer 402, the first electrode 202 and the second electrode 206 are the same as those described in the first example, and therefore will not be described again.

[0124] 13 is a schematic cross-sectional view illustrating a third example of the resonator structure. In the third example, the first electrode 202 and the second electrode 206 are formed to have the same film thickness in each pixel 100.

[0125] Also in the third example, a reflector 401 is disposed below the first electrode 202 of the pixel 100, with an optical adjustment layer 402 sandwiched therebetween. A resonator structure that resonates light generated by the organic layer 204 is formed between the reflector 401 and the second electrode 206. As in the first and second examples, the film thickness of the optical adjustment layer 402 varies depending on the color to be displayed by the pixel 100. As in the second example, the upper surface of the second electrode 206 is disposed so as to be aligned in the pixels 100R, 100G, and 100B.

[0126] In the second example shown in FIG. 12, in order to align the upper surfaces of the second electrodes 206, the lower surface of the reflector 401 has a stepped shape corresponding to the type of pixel 100R, 100G, or 100B.

[0127] 13, the film thickness of the reflector 401 is set to be different depending on the type of pixel 100R, 100G, and 100B. More specifically, the film thickness is set so that the bottom surfaces of the reflectors 401R, 401G, and 401B are aligned.

[0128] The materials constituting the reflector 401, the optical adjustment layer 402, the first electrode 202 and the second electrode 206 are the same as those described in the first example, and therefore will not be described again.

[0129] (Fourth Example of Resonator Structure) FIG. 14 is a schematic cross-sectional view for explaining a fourth example of the resonator structure.

[0130] 11 , the first electrode 202 and the second electrode 206 of the pixel 100 are formed to have the same film thickness. A reflector 401 is disposed below the first electrode 202 of the pixel 100 with an optical adjustment layer 402 sandwiched therebetween.

[0131] In contrast to this, in the fourth example shown in FIG. 14, the optical adjustment layer 402 is omitted, and the film thickness of the first electrode 202 is set to differ depending on the type of pixel 100R, 100G, 100B.

[0132] The reflector 401 is formed to have a common film thickness in each pixel 100. The film thickness of the first electrode 202 varies depending on the color to be displayed by the pixel 100. By having the first electrodes 202R, 202G, and 202B 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.

[0133] The materials constituting the reflector 401, the first electrode 202 and the second electrode 206 are the same as those described in the first example, and therefore a description thereof will be omitted.

[0134] (Resonator Structure: Fifth Example) FIG. 15 is a schematic cross-sectional view for explaining a fifth example of the resonator structure.

[0135] 11 , the first electrode 202 and the second electrode 206 are formed to have the same film thickness in each pixel 100. A reflector 401 is disposed below the first electrode 202 of the pixel 100 with an optical adjustment layer 402 sandwiched therebetween.

[0136] 15, the optical adjustment layer 402 is omitted, and instead, an oxide film 404 is formed on the surface of the reflector 401. The thickness of the oxide film 404 is set to differ depending on the type of pixel 100R, 100G, and 100B.

[0137] The thickness of the oxide film 404 varies depending on the color to be displayed by the pixel 100. By having the oxide films 404R, 404G, and 404B 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.

[0138] The oxide film 404 is a film obtained by oxidizing the surface of the reflector 401, and is made of, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. The oxide film 404 functions as an insulating film for adjusting the optical path length (optical distance) between the reflector 401 and the second electrode 206.

[0139] The oxide film 404, which has a different thickness depending on the type of pixel 100R, 100G, 100B, can be formed, for example, as follows.

[0140] First, a container is filled with an electrolyte, and the substrate on which the reflector 401 is formed is immersed in the electrolyte. An electrode is disposed so as to face the reflector 401.

[0141] A positive voltage is then applied to the reflector 401 with the electrode as the reference, and the reflector 401 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 voltages corresponding to the types of pixels 100R, 100G, and 100B are applied to the reflectors 401R, 401G, and 401B, respectively. This allows oxide films 404 with different thicknesses to be formed simultaneously.

[0142] The materials constituting the reflector 401, the first electrode 202 and the second electrode 206 are the same as those described in the first example, and therefore a description thereof will be omitted.

[0143] (Resonator Structure: Sixth Example) FIG. 16 is a schematic cross-sectional view illustrating a sixth example of the resonator structure. In the sixth example, the pixel 100 is configured by stacking a first electrode 202, an organic layer 204, and a second electrode 206. However, in the sixth example, the first electrode 202 is formed so as to function both as an electrode and a reflector. The first electrode (also known as a reflector) 202 is formed from a material having an optical constant selected according to the type of pixel 100R, 100G, or 100B. By varying the phase shift caused by the first electrode (also known as a reflector) 202, it is possible to set an optical distance that generates optimal resonance for the wavelength of light corresponding to the color to be displayed.

[0144] The first electrode (also serving as a reflector) 202 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) 202R of the pixel 100R can be made of copper (Cu), and the first electrode (also serving as a reflector) 202G of the pixel 100G and the first electrode (also serving as a reflector) 202B of the pixel 100B can be made of aluminum.

[0145] The material constituting the second electrode 206 is the same as that described in the first example, and therefore a description thereof will be omitted.

[0146] (Resonator Structure: Seventh Example) Figure 17 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 pixels 100R and 100G, and the first example is applied to the pixel 100B. 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.

[0147] The first electrodes (which also serve as reflectors) 202R and 202G used in the pixels 100R and 100G can be made of a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing these as its main components.

[0148] The materials constituting the reflector 401B, the optical adjustment layer 402B, and the first electrode 202B used in the pixel 100B are the same as those described in the first example, and therefore description thereof will be omitted.

[0149] <<7. Application Examples>> For example, the technology according to the present disclosure may be applied to the display units of various electronic devices, etc. Therefore, examples of electronic devices to which the technology can be applied will be described below.

[0150] 18A is a front view showing an example of the appearance of a digital still camera 500, and Fig. 18B 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.

[0151] 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 light-emitting device 10 according to an embodiment of the present disclosure can be used as the monitor 514 or the electronic viewfinder 515.

[0152] 19 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 light-emitting device 10 according to an embodiment of the present disclosure can be used as the display unit 611.

[0153] 20 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.

[0154] 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.

[0155] 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.

[0156] 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 light-emitting device 10 according to an embodiment of the present disclosure can be used for the display unit of the main body 632.

[0157] 21 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 using the light-emitting device 10 according to an embodiment of the present disclosure.

[0158] 22 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 a user, and the like. The display unit 802 can be the light-emitting device 10 according to this embodiment.

[0159] 23A and 23B are diagrams showing the internal configuration of a vehicle having the light-emitting device 10 according to an embodiment of the present disclosure as a display device. In detail, Fig. 23A is a diagram showing the internal configuration of the vehicle from the rear to the front, and Fig. 23B is a diagram showing the internal configuration of the vehicle from diagonally rear to diagonally front.

[0160] 23A and 23B 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 light-emitting device 10 according to an embodiment of the present disclosure can be applied to some or all of these displays.

[0161] 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. 23A and 23B 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.

[0162] 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 back 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 recognition, 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, and a function that recognizes the occupant's face using a sensor and provides content suitable for the occupant via the AV device.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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 regarding the operation of AV equipment, air conditioning equipment, etc.

[0167] 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).

[0168] <<8. Supplementary Information>> Although preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to such examples. It is clear that a person skilled in the art of the present disclosure can conceive of various modified or altered examples within the scope of the technical idea described in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure.

[0169] Furthermore, the effects described herein are merely descriptive or exemplary and are not limiting. In other words, the technology according to the present disclosure may achieve other effects that will be apparent to those skilled in the art from the description of this specification, in addition to or in place of the above-described effects.

[0170] The present technology can also be configured as follows. (1) A light-emitting device comprising: a substrate; and a light-emitting region consisting of a plurality of light-emitting elements arranged on the substrate, wherein an optical system is provided above each of the plurality of light-emitting elements for directing the direction of a principal light axis of each of the plurality of light-emitting elements in a desired direction, and wherein the planar shape of each of the light-emitting elements varies depending on its position within the light-emitting region. (2) The light-emitting device according to (1) above, wherein the planar shape of each of the light-emitting elements has asymmetry depending on its position within the light-emitting region. (3) The light-emitting device according to (2) above, wherein the planar shape of the light-emitting element located in a first region within the light-emitting region is symmetrical with respect to a horizontal axis extending along the lateral direction of the light-emitting region and a vertical axis extending along the longitudinal direction of the light-emitting region, and the planar shape of the light-emitting element located in a second region within the light-emitting region is asymmetrical with respect to at least one of the horizontal axis and the vertical axis. (4) The light-emitting device according to (2) above, wherein, for the light-emitting element located in a first region of the light-emitting region, a center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element coincides with the center of gravity of the planar shape of the light-emitting element, and, for the light-emitting element located in a second region of the light-emitting region, a center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element does not coincide with the center of gravity of the planar shape of the light-emitting element. (5) The light-emitting device according to (3) or (4) above, wherein the first region is a central portion of the light-emitting region, and the second region is a peripheral portion along an outer edge of the light-emitting region. (6) The light-emitting device according to (2) above, wherein the asymmetry of the planar shape of each light-emitting element changes depending on the relative distance between the position of the light-emitting element in the light-emitting region and a predetermined point in the light-emitting region. (7) The light-emitting device according to (6) above, wherein the distance between the center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element and the center of gravity of the planar shape of the light-emitting element changes depending on the relative distance. (8) The light emitting device according to (6), wherein the planar shape of each of the light emitting elements becomes more asymmetric as the position of the light emitting element within the light emitting region approaches the outer edge of the light emitting region.(9) The light-emitting device according to (8), wherein the distance between a center point, which is the midpoint of the vertical and horizontal lengths of each light-emitting element, and the center of gravity of the planar shape of the light-emitting element increases as the position of each light-emitting element within the light-emitting region approaches the outer edge of the light-emitting region. (10) The light-emitting device according to (5), wherein the planar shape of the light-emitting element located in the first region is circular, and the planar shape of the light-emitting element located in the second region is teardrop-shaped. (11) The light-emitting device according to any one of (2) to (9), wherein the planar shape of the light-emitting element is polygonal. (12) The light-emitting device according to any one of (1) to (11), wherein the light-emitting element has: a first electrode provided on the substrate; a light-emitting layer stacked on the first electrode and emitting light; a second electrode stacked on the light-emitting layer and transmitting light from the light-emitting layer; and a protective film stacked on the second electrode. (13) The light-emitting device according to (12), wherein the planar shape of the light-emitting element is determined by the planar shape of the first electrode. (14) The light-emitting device according to (12), wherein the planar shape of the light-emitting element is determined by the planar shapes of the light-emitting layer and the second electrode. (15) The light-emitting device according to (12), wherein an outer periphery of the first electrode is covered with an inter-pixel insulating portion, and the planar shape of the light-emitting element is determined by the shape of the first electrode exposed from an opening of the inter-pixel insulating portion. (16) The light-emitting device according to any one of (1) to (15), wherein a color filter that transmits light having a predetermined wavelength is provided above each of the plurality of light-emitting elements as the optical system, and wherein the distance between a center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element and a center point that is the midpoint of the vertical and horizontal lengths of the color filter varies depending on the position of the light-emitting element within the light-emitting region. (17) The light emitting device according to (16), wherein in a plan view of the light emitting region, the center of gravity of the planar shape of the light emitting element coincides with a center point that is the midpoint of the vertical length and horizontal length of the color filter.(18) The light-emitting device according to any one of (1) to (15), wherein an on-chip lens that refracts light from the light-emitting element is provided above each of the plurality of light-emitting elements as the optical system, and a distance between a center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element and a center point that is the midpoint of the vertical and horizontal lengths of the on-chip lens varies depending on the position of the light-emitting element within the light-emitting region. (19) The light-emitting device according to (18), wherein, in a plan view of the light-emitting region, the center of gravity of the planar shape of the light-emitting element coincides with the center point that is the midpoint of the vertical and horizontal lengths of the on-chip lens. (20) The light-emitting device according to (12), wherein the light-emitting element further has: a contact hole that is provided in the protective film and exposes a portion of an upper surface of the second electrode; and a first wiring that covers at least a portion of a side surface of the contact hole, and the second electrodes of adjacent light-emitting elements are electrically connected to each other via the first wiring. (21) The light-emitting device according to (12), wherein the light-emitting element further has a second wiring electrically connected to the outer periphery of the upper surface of the second electrode exposed from the outer periphery of the protective film and covering at least a part of a side surface of the protective film, and the second electrodes of adjacent light-emitting elements are electrically connected to each other via the second wiring. (22) The light-emitting device according to (12), wherein parts of the second electrodes of adjacent light-emitting elements are electrically connected to each other. (23) An electronic device having a light-emitting device mounted thereon, wherein the light-emitting device comprises: a substrate; and a light-emitting region consisting of a plurality of light-emitting elements arranged on the substrate, wherein an optical system is provided above each of the plurality of light-emitting elements for directing a direction of a chief ray axis of each of the plurality of light-emitting elements in a desired direction, and wherein the planar shape of each of the light-emitting elements differs depending on its position within the light-emitting region.

[0171] REFERENCE SIGNS LIST 10 Light-emitting device 11 Horizontal drive circuit 12 Vertical drive circuit 20 Light-emitting region 100, 100B, 100G, 100R Pixel 200, 200B, 200G, 200R Light-emitting element 202 Anode electrode 204 Light-emitting layer 206 Cathode electrode 208 Inter-pixel insulating portion 210, 220 Protective film 212, 214 Wiring 230 Contact hole 300 Substrate 302 Color filter 304 On-chip lens 340 Square 350 Rectangle 352 Right-angled triangle 354 Trapezoid

Claims

1. A light-emitting device comprising: a substrate; and a light-emitting region consisting of a plurality of light-emitting elements arranged on the substrate, wherein an optical system is provided above each of the plurality of light-emitting elements to direct the direction of the principal light axis of each of the plurality of light-emitting elements in a desired direction, and wherein the planar shape of each of the light-emitting elements differs depending on its position within the light-emitting region.

2. The light emitting device according to claim 1, wherein the planar shape of each of said light emitting elements has asymmetry according to the position of the light emitting element within said light emitting region.

3. The light-emitting device according to claim 2, wherein the planar shape of the light-emitting element located in a first region within the light-emitting region is symmetrical with respect to a horizontal axis extending along the lateral direction of the light-emitting region and a vertical axis extending along the longitudinal direction of the light-emitting region, and the planar shape of the light-emitting element located in a second region within the light-emitting region is asymmetrical with respect to at least one of the horizontal axis and the vertical axis.

4. The light-emitting device according to claim 2, wherein, in the light-emitting element located in the first region of the light-emitting region, the center point which is the midpoint of the vertical length and horizontal length of the light-emitting element coincides with the center of gravity of the planar shape of the light-emitting element, and, in the light-emitting element located in the second region of the light-emitting region, the center point which is the midpoint of the vertical length and horizontal length of the light-emitting element does not coincide with the center of gravity of the planar shape of the light-emitting element.

5. The light emitting device according to claim 3, wherein the first region is a central portion of the light emitting region, and the second region is a peripheral portion along the outer edge of the light emitting region.

6. The light emitting device according to claim 2, wherein the asymmetry of the planar shape of each of the light emitting elements changes depending on the relative distance between the position of the light emitting element within the light emitting region and a predetermined point within the light emitting region.

7. The light emitting device according to claim 6, wherein the distance between the center point, which is the midpoint of the vertical and horizontal lengths of the light emitting element, and the center of gravity of the planar shape of the light emitting element changes depending on the relative distance.

8. The light emitting device according to claim 6, wherein the planar shape of each of the light emitting elements becomes increasingly asymmetric as the position of the light emitting element within the light emitting region approaches the outer edge of the light emitting region.

9. The light-emitting device according to claim 8, wherein the distance between the center point, which is the midpoint of the vertical and horizontal lengths of each light-emitting element, and the center of gravity of the planar shape of the light-emitting element increases as the position of each light-emitting element within the light-emitting region approaches the outer edge of the light-emitting region.

10. The light emitting device according to claim 5, wherein the planar shape of the light emitting element located in the first region is circular, and the planar shape of the light emitting element located in the second region is teardrop-shaped.

11. The light emitting device according to claim 2, wherein the planar shape of said light emitting element is polygonal.

12. The light-emitting device according to claim 1, wherein the light-emitting element comprises: a first electrode provided on the substrate; a light-emitting layer laminated on the first electrode and emitting light; a second electrode laminated on the light-emitting layer and transmitting light from the light-emitting layer; and a protective film laminated on the second electrode.

13. The light emitting device according to claim 12, wherein the planar shape of the light emitting element is determined by the planar shape of the first electrode.

14. The light-emitting device according to claim 12, wherein the planar shape of the light-emitting element is determined by the planar shapes of the light-emitting layer and the second electrode.

15. The light-emitting device according to claim 12, wherein the outer periphery of the first electrode is covered with an inter-pixel insulating portion, and the planar shape of the light-emitting element is determined by the shape of the first electrode exposed from an opening in the inter-pixel insulating portion.

16. The light-emitting device according to claim 1, wherein a color filter that transmits light having a predetermined wavelength is provided above each of the plurality of light-emitting elements as the optical system, and the distance between the center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element and the center point that is the midpoint of the vertical and horizontal lengths of the color filter varies depending on the position of the light-emitting element within the light-emitting region.

17. The light emitting device according to claim 16, wherein, in a plan view of the light emitting region, the center of gravity of the planar shape of the light emitting element coincides with a center point that is the midpoint of the vertical length and horizontal length of the color filter.

18. The light-emitting device according to claim 1, wherein an on-chip lens that refracts light from the light-emitting element is provided above each of the plurality of light-emitting elements as the optical system, and the distance between a center point that is the midpoint of the vertical and horizontal lengths of the light-emitting element and a center point that is the midpoint of the vertical and horizontal lengths of the on-chip lens varies depending on the position of the light-emitting element within the light-emitting region.

19. The light-emitting device according to claim 18, wherein, in a plan view of the light-emitting region, the center of gravity of the planar shape of the light-emitting element coincides with a center point that is the midpoint of the vertical length and horizontal length of the on-chip lens.

20. An electronic device equipped with a light-emitting device, the light-emitting device comprising: a substrate; and a light-emitting region consisting of a plurality of light-emitting elements arranged on the substrate; above each of the plurality of light-emitting elements, an optical system is provided for directing the direction of the principal light axis of each of the plurality of light-emitting elements to a desired direction; and the planar shape of each of the light-emitting elements differs depending on its position within the light-emitting region.

Images