Light-emitting device, image forming apparatus, display device, photoelectric conversion device, electronic device, and wearable device

Abstract

The present application relates to a light-emitting device, an image forming device, a display device, a photoelectric conversion device, an electronic device, and a wearable device. Provided is a device including a light-emitting element and an optical member, the light-emitting element being arranged on a surface of a substrate and including a light-emitting portion and a lens, and light transmitted through the lens being incident on the optical member. In an orthogonal projection onto the surface, a length of the optical member in a first direction is shorter than a length of the optical member in a second direction orthogonal to the first direction, in a virtual cross section along the first direction and passing through an apex of the lens, a light beam emitted from the light-emitting portion and transmitted through the lens includes light rays incident on one end and the other end of the optical member in the first direction, and a length of the light-emitting portion in the first direction is shorter than a length of the light-emitting portion in the second direction.

Description

Technical Field

[0001] This disclosure relates to light-emitting devices, image forming apparatuses, display devices, photoelectric conversion devices, electronic devices, and wearable devices. Background Technology

[0002] Japanese Patent Application Publication No. 2022-114845 describes a method that increases the proportion of light contributing to the display and reduces power consumption by arranging microlenses on the light-emitting part and adjusting the size and shape of the light-emitting part.

[0003] To improve the performance of a light-emitting device, it is necessary to further reduce its power consumption. A light-emitting device can include various components depending on its intended use and specifications. By adjusting the shape of the light-emitting portion according to the components included in the device, the proportion of light that does not contribute to the display can be reduced, thereby further reducing power consumption. Summary of the Invention

[0004] Some embodiments of this disclosure provide techniques that help reduce power consumption.

[0005] According to some embodiments, a light-emitting device is provided, comprising: a substrate; and a light-emitting element disposed on a main surface of the substrate and including a light-emitting portion comprising an organic layer and a lens disposed on the light-emitting portion. The device further includes an optical member on the light extraction side of the light-emitting element, wherein light transmitted through the lens is incident on the optical member. In an orthogonal projection onto the main surface, the length of the optical member in a first direction is shorter than its length in a second direction orthogonal to the first direction. In a virtual cross-section along the normal direction of the main surface and the first direction and passing through the vertex of the lens, a light beam emitted from the light-emitting portion and transmitted through the lens includes light rays incident on one end and the other end of the optical member in the first direction, respectively. Furthermore, in an orthogonal projection onto the main surface, the length of the light-emitting portion in the first direction is shorter than its length in the second direction.

[0006] According to some other embodiments, a light-emitting device is provided, comprising: a substrate; and a light-emitting element disposed on a main surface of the substrate and including a light-emitting portion comprising an organic layer and a lens disposed on the light-emitting portion, wherein the light-emitting device further includes an optical member on the light extraction side of the light-emitting element, wherein light transmitted through the lens is incident on the optical member, the upper surface of the lens has a convex shape facing the optical member, and in orthogonal projection onto the main surface, the length of the optical member in a first direction is shorter than the length of the optical member in a second direction orthogonal to the first direction, and in orthogonal projection onto the main surface, the length of the light-emitting portion in the first direction is shorter than the length of the light-emitting portion in the second direction.

[0007] According to still other embodiments, there is provided a light-emitting device including: a substrate, and a plurality of light-emitting elements arranged on a main surface of the substrate, each of the light-emitting elements including a light-emitting portion and a lens arranged corresponding to the light-emitting portion, wherein in an orthogonal projection onto the main surface, the center of the light-emitting portion is arranged to overlap with the corresponding lens, the length of the light-emitting portion in a first direction is shorter than the length of the light-emitting portion in a second direction orthogonal to the first direction, and when d1 represents the shortest distance between the centers of the light-emitting portions of the light-emitting elements adjacent to each other among the plurality of light-emitting elements, and d2 represents the longest distance from the center of the lens to the outer edge of the lens, the relationship d1 / 2 < d2 is satisfied.

[0008] The features of the present disclosure will become apparent from the following description of embodiments with reference to the accompanying drawings. The following description of embodiments is given by way of example. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0010] Figure 2 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0011] Figure 3 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0012] Figure 4 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0013] Figure 5 is a diagram showing an example of the effect of a light-emitting device according to an embodiment;

[0014] Figure 6 is a diagram showing an example of the effect of a light-emitting device according to an embodiment;

[0015] Figure 7 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0016] Figure 8 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0017] Figure 9 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0018] Figure 10 is a diagram showing an example of the arrangement of a light-emitting device according to an embodiment;

[0019] Figures 11A to 11CThis is a diagram showing an example of an image forming apparatus using a light-emitting device according to an embodiment;

[0020] Figure 12 This is a diagram showing an example of a display device using a light-emitting device according to an embodiment;

[0021] Figure 13 This is a diagram showing an example of a photoelectric conversion device using a light-emitting device according to an embodiment;

[0022] Figure 14 This is a diagram showing an example of an electronic device using a light-emitting device according to an embodiment;

[0023] Figure 15A and Figure 15B These are diagrams showing examples of display devices that each use a light-emitting device according to an embodiment;

[0024] Figure 16 This is a diagram showing an example of a lighting device using a light-emitting device according to an embodiment;

[0025] Figure 17A and Figure 17B A diagram showing an example of a moving body using a light-emitting device according to an embodiment; and

[0026] Figure 18A and Figure 18B These are diagrams showing examples of wearable devices using the light-emitting device according to embodiments. Detailed Implementation

[0027] In the following, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments are not intended to limit the scope of the claims. Several features are described in the embodiments, but not all such features are required, and several such features can be appropriately combined. Furthermore, in the drawings, the same reference numerals are assigned the same or similar configurations, and redundant descriptions thereof are omitted.

[0028] refer to Figures 1 to 10 The following will describe the light-emitting device according to the present disclosure. Figure 1 and Figure 2 This is an example diagram showing an arrangement of a portion of the light-emitting device 100 according to this embodiment. More specifically, Figure 1 It is an orthogonal projection of the light-emitting device 100 when viewed in a direction perpendicular to the main surface 151 (normal direction) of the substrate 108 constituting the light-emitting device 100. Figure 2 It is along Figure 1 A cross-sectional view taken from line A-A'.

[0029] The light-emitting device 100 includes a substrate 108, a light-emitting portion 132 disposed on the main surface 151 of the substrate 108, a light-emitting element 101 including a lens 117 disposed above the light-emitting portion 132, and a plurality of pads 134 for electrically connecting to the outside of the light-emitting device 100. The light-emitting element 101 includes a light-emitting portion 132 and a lens 117 disposed corresponding to the light-emitting portion 132. Figure 1 and Figure 2 The example shown illustrates an organic light-emitting element, which, as a light-emitting portion 132, includes an electrode 109 (also referred to as a lower electrode, etc.), an organic layer 120 including a light-emitting layer, and an electrode 111 (also referred to as an upper electrode, etc.). However, this disclosure is not limited thereto, and for example, as the light-emitting portion 132, a light-emitting element comprising inorganic light-emitting materials or quantum dots can be used, or a light-emitting diode, etc., can be used. For example, a so-called micro LED can be used as the light-emitting portion 132. Details of the light-emitting element 101 and its components, such as the insulating layer 112, the protective layer 113, and the planarization layer 114, will be described later.

[0030] The light-emitting device 100 further includes an optical member 102 on the light extraction side of the light-emitting element 101, wherein light transmitted through the lens 117 is incident on the optical member 102. The optical member 102 transmits light emitted from the light-emitting element 101 and may have functions of focusing, diffusing, imaging, or projecting light. For example, when used as an exposure apparatus for image forming, the light-emitting device 100 may have the function of converging light emitted from the light-emitting element 101 onto the surface of a photosensitive member. In this case, the optical member 102 may be an upright, equal-magnification lens array that images the light emitted from the light-emitting element 101 onto the surface of the photosensitive member in an upright, equal-magnification manner. In this embodiment, as... Figure 1 As shown, in an orthogonal projection of the main surface 151 of the substrate 108, the length of the optical component 102 in direction D1 is shorter than its length in direction D2, which is orthogonal to direction D1. The length of the optical component 102 in direction D1 can be, for example, more than 0.1 mm and less than 10 mm. The length of the optical component 102 in direction D2 can be, for example, more than 100 mm and less than 2,000 mm.

[0031] Here, the length of the optical component 102 in direction D1 can be defined as the distance between the two intersection points of a virtual straight line 136, which passes through the center of the optical component 102 and is parallel to direction D1, and the outer edge of the optical component 102 in an orthogonal projection onto the main surface 151 of the substrate 108. Similarly, the length of the optical component 102 in direction D2 can be defined as the distance between the two intersection points of a virtual straight line 137, which passes through the center of the optical component 102 and is parallel to direction D2, and the outer edge of the optical component 102 in an orthogonal projection onto the main surface 151 of the substrate 108. The center of the optical component 102 in the orthogonal projection onto the main surface 151 of the substrate 108 can be defined as the geometric centroid of the planar shape of the outer edge of the optical component 102 in the orthogonal projection onto the main surface 151 of the substrate 108. Figure 1 In the arrangement shown, in the orthogonal projection of the main surface 151 of the substrate 108, the length of the optical component 102 passing through its center has a minimum value in direction D1. In the orthogonal projection of the main surface 151 of the substrate 108, the length of the optical component 102 passing through its center has a maximum value in direction D2. Figure 1 In the arrangement shown, virtual lines 136 and 137 are axes of symmetry of the outer edge shape of the optical component 102, but are not necessarily axes of symmetry.

[0032] Next, in an orthogonal projection onto the main surface 151 of the substrate 108, the outer edge of the optical member 102 can be defined as the outer edge of the region of the optical member 102 that transmits light emitted from the light-emitting element 101. When the optical member 102 includes a plurality of lens elements (such as a lens array) arranged adjacent to each other, a polygon surrounding the plurality of lens elements and surrounding the outermost lens element can be defined as the outer edge of the optical member 102. Here, the polygon can be, for example, a quadrilateral. The optical member 102 can be arranged at intervals from the lens 117 of the light-emitting element 101. In this case, the region between the optical member 102 and the lens 117 of the light-emitting element 101 can be, for example, a space containing a gas such as air. Optionally, for example, a transparent resin can be disposed in the region between the optical member 102 and the lens 117 of the light-emitting element 101. The distance between the optical member 102 and the lens 117 of the light-emitting element 101 in the direction perpendicular to the main surface 151 of the substrate 108 can be, for example, more than 1 mm and less than 50 mm.

[0033] Lens 117 may also be referred to as a microlens, etc. The surface of lens 117 (also called the upper surface, etc.) has a convex shape in the direction away from the main surface 151 of substrate 108. Furthermore, the upper surface of lens 117 has a convex shape facing the optical member 102. Light emitted from the light-emitting portion 132 in the outward direction (in the direction perpendicular to the main surface 151 of substrate 108, away from the center of the light-emitting portion 132) can be converted into parallel light (collimated light) by refraction at the surface of lens 117, and extracted in the direction perpendicular to the main surface of substrate 108 (frontal direction). That is, lens 117 can be used as a collimator. Lens 117 may have light-concentrating properties. Lens 117 may have positive refractive power for converting light emitted from the light-emitting portion 132 into parallel or converging light. Lens 117 may have, for example, a convex shape in the direction facing the light-emitting portion 132. However, in this case, an air layer or the like may be needed between the lens 117 and the planarization layer 114 or the like (described later) on the light-emitting portion 132 to generate a refractive index difference from the lens 117. Therefore, the distance between the light-emitting portion 132 and the lens 117 needs to be large. In this embodiment, the surface of the lens 117 has a convex shape in the direction away from the main surface 151 of the substrate 108. Therefore, the lens 117 becomes capable of... Figure 2 The light-emitting device 100 is arranged directly as shown. Therefore, the light-emitting device 100 can be miniaturized.

[0034] Lens 117 includes a vertex 141. The vertex 141 of lens 117 can be, for example, the portion of the surface of lens 117 furthest from the main surface 151 of substrate 108. Alternatively, the vertex 141 of lens 117 can be, for example, the set of points with the greatest distance from the main surface 151 of substrate 108. Furthermore, the vertex 141 of lens 117 can be, for example, a portion of the surface of lens 117 where a tangent is parallel to the main surface 151 of substrate 108. Figure 2 The image shows a cross-section taken through the vertex 141 of the lens 117 and along the normal direction of the main surface 151 of the substrate 108. Here, the distance between the optical member 102 and the vertex 141 of the lens 117 in the normal direction of the main surface 151 of the substrate 108 can be greater than the distance between the vertex 141 of the lens 117 and the light-emitting part 132 in the normal direction of the main surface 151 of the substrate 108.

[0035] When lenses 117, arranged to correspond independently to adjacent light-emitting elements 101, are formed independently, the outer edge 145 of lens 117 is the outermost peripheral portion of lens 117. For example... Figure 2As shown, when lenses 117 arranged to correspond to adjacent light-emitting elements 101 are formed as at least partially continuous, the outer edge 145 of a lens 117 can be, for example, the set of points where the distance between the surface of the lens 117 and the main surface 151 of the substrate 108 is minimized. For example, the outer edge 145 of a lens can be the portion where the tangent to the surface of the lens 117 between adjacent light-emitting elements 101 is parallel to the main surface 151 of the substrate 108. The region enclosed by the outer edge 145 can be defined as a lens 117. The geometric centroid of the planar shape of the outer edge 145 in an orthographic projection onto the main surface 151 of the substrate 108 can be defined as the center of the lens 117. In an orthographic projection onto the main surface 151 of the substrate 108, the vertex 141 of the lens 117 and the center of the lens 117 can be arranged in the same location or in different locations.

[0036] Figure 3 This is a plan view focusing on the outer edge 145 of the lens 117 and the light-emitting part 132 in an orthogonal projection of the main surface 151 of the substrate 108. Figure 4 Is it displayed along Figure 3 A schematic diagram of the cross-section intercepted by line B-B'. Figure 3 In the example shown, the outer edge 145 of the lens 117 has a square shape.

[0037] The length of lens 117 in direction D1 can be defined as the distance between the two intersection points of a virtual straight line passing through the center of lens 117 and parallel to direction D1 in the orthogonal projection of the main surface 151 of substrate 108 and the outer edge 145 of lens 117. Similarly, the length of lens 117 in direction D2 can be defined as the distance between the two intersection points of a virtual straight line passing through the center of lens 117 and parallel to direction D2 in the orthogonal projection of the main surface 151 of substrate 108 and the outer edge 145 of lens 117. The center of lens 117 in the orthogonal projection of the main surface 151 of substrate 108 can be defined as the geometric centroid of the planar shape of the outer edge 145 in the orthogonal projection of the main surface 151 of substrate 108.

[0038] When multiple light-emitting portions 132 are arranged on the substrate 108, the area enclosed by the vertical bisector between the centers of the adjacent light-emitting portions 132 can be defined as a unit pixel 133 corresponding to a light-emitting element 101. Figure 3 One of the units is shown as 133 pixels. Figure 3In the example shown, the unit pixel 133 has a square shape, and one unit pixel 133 includes a light-emitting portion 132. The outer edge 145 of the lens 117 matches the outer edge of the unit pixel 133. The outer edge of the unit pixel 133 may be, for example, a polygon formed by connecting the points with the shortest distance from the center of gravity of the lower electrode of one pixel to the center of gravity of the lower electrode of the pixel adjacent to the one pixel in the orthogonal projection onto the main surface 151 of the substrate 108. From the viewpoint of improving the light extraction efficiency using the lens 117, the area of the lens 117 in the orthogonal projection onto the main surface 151 of the substrate 108 can be increased. Therefore, the area of the unit pixel 133 occupied by the lens 117 can be increased, and the shape of the outer edge 145 of the lens 117 can be the same as the shape of the unit pixel 133. The shape of the outer edge 145 of the lens 117 may be similar to the unit pixel 133. On the other hand, as will be described later, in order to reduce power consumption, in the orthogonal projection onto the main surface 151 of the substrate 108, the shape of the outer edge of the light-emitting portion 132 is not similar to the shape of the outer edge of the unit pixel 133 including the light-emitting portion 132. Therefore, in the orthogonal projection onto the main surface 151 of the substrate 108, the shape of the outer edge of the light-emitting portion 132 is not similar to the shape of the outer edge 145 of the lens 117.

[0039] From another viewpoint, as Figure 3 shown, let d1 be the shortest distance between the centers of the light-emitting portions 132 in the light-emitting elements 101 (unit pixels 133) arranged adjacent to each other, and d2 be the longest distance from the center to the outer edge 145 in the lens 117.

[0040] In this case, the relationship represented by d1 / 2 < d2...(1) can be satisfied. By satisfying the relationship represented by the inequality (1), the area of the unit pixel 133 occupied by the lens 117 can be increased. Therefore, the light extraction efficiency can be improved.

[0041] In this embodiment, the light-emitting portion 132, in an orthogonal projection onto the main surface 151 of the substrate 108, has a shape in which its length in direction D1 is shorter than its length in direction D2, which is orthogonal to direction D1. Here, the length of the light-emitting portion 132 in direction D1 can be defined as the distance between two intersection points of a virtual straight line passing through the center of the light-emitting portion 132 and parallel to direction D1 in the orthogonal projection onto the main surface 151 of the substrate 108, and the outer edge of the light-emitting portion 132. Similarly, the length of the light-emitting portion 132 in direction D2 can be defined as the distance between two intersection points of a virtual straight line passing through the center of the light-emitting portion 132 and parallel to direction D2 in the orthogonal projection onto the main surface 151 of the substrate 108, and the outer edge of the light-emitting portion 132. The center of the light-emitting portion 132 in the orthogonal projection onto the main surface 151 of the substrate 108 can be defined as the geometric centroid position of the planar shape of the outer edge of the light-emitting portion 132 in the orthogonal projection onto the main surface 151 of the substrate 108. Figure 3 In the arrangement shown, in the orthogonal projection of the main surface 151 of the substrate 108, the length of the light-emitting portion 132 passing through the center of the light-emitting portion 132 has a minimum value in direction D1. In the orthogonal projection of the main surface 151 of the substrate 108, the length of the light-emitting portion 132 passing through the center of the light-emitting portion 132 has a maximum value in direction D2.

[0042] The effect of forming the light-emitting part 132 with a shape in which the length in direction D1 is shorter than the length in direction D2 will be described below. Figure 5 and Figure 6 This is a schematic diagram used to explain the light emitted from the light-emitting part 132, refracted at the surface of the lens 117, and extracted. Figure 5 The light emitted from near the center of the light-emitting part 132 is shown. Figure 6 The light emitted from the vicinity of the light-emitting part 132 is shown. For example... Figure 5 As shown, light emitted from near the center of the light-emitting portion 132 is refracted in the normal direction relative to the main surface 151 of the substrate 108. On the other hand, as... Figure 6 As shown, light emitted from the vicinity of the outer periphery of the light-emitting portion 132 is refracted obliquely relative to the main surface 151 of the substrate 108. The angle formed by the light rays refracted and extracted at the surface of the lens 117 and the perpendicular line to the main surface 151 of the substrate 108 is defined as the radiation angle. It can be said that light emitted from the vicinity of the outer periphery of the light-emitting portion 132 has a larger radiation angle than light emitted from the vicinity of the center.

[0043] The fact that light emitted from the outer periphery of the light-emitting portion 132 has a larger radiation angle than light emitted from the center can also be understood from the following explanation. Conversely, consider light rays incident on the lens 117 from the light extraction side in a direction perpendicular to the main surface 151 of the substrate 108. In this case, the lens 117 has a focusing effect, causing the light rays to reach the vicinity of the center of the light-emitting portion 132. On the other hand, light rays incident obliquely onto the lens 117 from a direction perpendicular to the main surface 151 of the substrate 108 reach the outer periphery of the light-emitting portion 132. The greater the angle of inclination from the direction perpendicular to the main surface 151 of the substrate 108, the farther the light rays reach from the center of the light-emitting portion 132. Since the light rays travel the same optical path even from opposite sides, it can be understood that light emitted from the outer region of the light-emitting portion 132 is extracted at an angle relative to the main surface 151 of the substrate 108 from the normal direction.

[0044] As described above, the length of the optical component 102 in direction D1 is shorter than its length in direction D2, which is orthogonal to direction D1. Therefore, the radiation angle of light that can be transmitted through the optical component 102 in direction D1 is smaller than the radiation angle of light that can be transmitted through the optical component 102 in direction D2. When the light-emitting portion 132 has a shape in which its length in direction D1 is equal to its length in direction D2, the radiation angle is the same in both directions D1 and D2. Then, in direction D1, some light rays may not transmit through the optical component 102. In this case, by shortening the length of the light-emitting portion 132 in direction D1, the amount of light with a large radiation angle in direction D1 is reduced, thereby reducing the light component that does not transmit through the optical component 102. Since the area of ​​the light-emitting portion 132 can be reduced while maintaining the amount of light transmitted through the optical component 102, the effect of reducing power consumption can be achieved by making the length of the light-emitting portion 132 in direction D1 smaller than its length in direction D2.

[0045] From another perspective, it can be understood that the greater the difference between the length of lens 117 and the length of light-emitting part 132, the more the amount of light with a large radiation angle can be reduced. Figures 1 to 4 In the example shown, in the orthogonal projection of the main surface 151 of the substrate 108, the difference between the length of the lens 117 in direction D1 and the length of the light-emitting part 132 in direction D1 is greater than the difference between the length of the lens 117 in direction D2 and the length of the light-emitting part 132 in direction D2. By satisfying this relationship, power consumption can be reduced.

[0046] As the length of the light-emitting portion 132 decreases in direction D1, the radiation angle in direction D1 also decreases. The length of the light-emitting portion 132 in direction D1 can be set such that, in a virtual cross-section along the normal direction of the main surface 151 of the substrate 108 and direction D1, and passing through the vertex of the lens 117, the light beam emitted from the light-emitting portion 132 and transmitted through the lens 117 includes light rays that are respectively incident on one end and the other end of the optical member 102 in direction D1. More specifically, for example, assuming that the length of the optical member 102 in direction D1 is 1 mm, and the distance between the optical member 102 and the lens 117 of the light-emitting element 101 in a direction perpendicular to the main surface 151 of the substrate 108 is 4 mm. Furthermore, assuming that the distance in direction D2 between the virtual straight line 137 of the optical member 102 parallel to direction D2 (as described above, the virtual straight line 137 can be the axis of symmetry in the planar shape of the outer edge of the optical member 102) and the center of the light-emitting portion 132 is 0.2 mm. In this case, according to calculations, the radiation angle of the light ray traveling in direction D1 toward one end of the optical member 102 is approximately 4°, and the radiation angle of the light ray traveling toward the other end is 10°. Therefore, the length of the light-emitting part 132 in direction D1 can be set such that when tracing the light emitted from the light-emitting part 132 and refracted at the interface between different materials according to Snell's law, as... Figure 5 and Figure 6 As shown, there are rays with a radiation angle of 4° and rays with a radiation angle of 10° or more. Here, it is possible for light emitted from the light-emitting part 132 and transmitted through the lens 117 to pass only between the two ends of the optical member 102 in direction D1. However, in this case, the optical member 102 is larger than necessary in direction D1, and the light-emitting device 100 can be enlarged.

[0047] From another perspective, the condition for the existence of light rays emitted from the light-emitting part 132, passing through the lens 117, and reaching the two ends of the optical member 102 in direction D1 can also be understood as light rays incident and refracted from the two ends of the optical member 102 toward the lens 117 reaching the light-emitting part 132. More specifically, in the same example as above, the condition for the existence of light rays reaching the two ends of the optical member 102 in direction D1 is that light rays incident from the light extraction side onto the lens 117 at angles of 4° and 10° respectively, corresponding to the radiation angles of the light rays, reach the light-emitting part 132.

[0048] Figures 1 to 6The arrangement shown illustrates an example in which the light-emitting portion 132 has an elliptical shape. However, this disclosure is not limited to this, as long as the length in direction D1 is shorter than the length in direction D2, depending on the shape of the optical component 102. In an orthographic projection onto the main surface 151 of the substrate 108, the shape of the light-emitting portion 132 can be a polygon such as a rectangle, rhombus, or parallelogram, or it can be a polygon with rounded corners (bevels). From another viewpoint, the shape of the light-emitting portion 132 can be a linearly symmetrical shape with only two axes of symmetry, and the two axes of symmetry can be parallel to directions D1 and D2, respectively. More specifically, as Figure 3 As shown, the light-emitting portion 132 can have an elliptical shape, with its minor axis parallel to direction D1 and its major axis parallel to direction D2. As another example, the light-emitting portion 132 can have a rectangular shape, with its two short sides parallel to direction D1 and its two long sides parallel to direction D2. For example, in an orthogonal projection onto the main surface 151 of the substrate 108, the outer edges of both the optical member 102 and the light-emitting portion 132 can have a planar shape, with the length having a minimum value in direction D1. Optionally, in an orthogonal projection onto the main surface 151 of the substrate 108, the external shape of the light-emitting portion 132 can be two-fold rotationally symmetric, and does not have more than three-fold rotational symmetry. By forming the light-emitting portion 132 with the above-described shape, the symmetry of the radiation angle characteristics in directions D1 and D2 can be enhanced while reducing power consumption. As another example, there may be cases where the distance between the center of the light-emitting portion 132 and one end of the optical member 102 in direction D1 is different from the distance between the center of the light-emitting portion 132 and the other end of the optical member 102. In this case, in order to improve light utilization efficiency, the light-emitting part 132 may have a linearly symmetrical shape with only one axis of symmetry, or the light-emitting part 132 may have a shape without rotational symmetry.

[0049] For example, when the light-emitting device 100 is incorporated into a display device such as a head-mounted display, where the light-emitting device 100 is worn near the user's eyes, the visible field of view can be altered between the vertical and horizontal directions. For instance, the human eye can see a wider range in the horizontal direction than in the vertical direction; therefore, a higher viewing angle may be required in the horizontal direction than in the vertical direction. In this case, by using optical components 102, light from multiple light-emitting elements 101 is amplified and projected onto the visible portion, such as eyeglasses. In this case, the display device requires a larger radiation angle in the direction of the larger visible field of view.

[0050] In such a case, even if the length of the optical member 102 in the direction D1 is not shorter than the length in the direction D2, the light-emitting portion 132 can be formed in a shape having a length in the first direction shorter than the length in the second direction. When the light-emitting device 100 is incorporated into a display device such as a head-mounted display, a pancake lens or the like can be used as the optical member 102. In this case, the optical member 102 may not have long sides and short sides as shown in Figure 1 and Figure 2 . Even in this case, by satisfying the relationship d1 / 2 < d2 represented by the above inequality (1), the amount of light having a large radiation angle in the direction D1 can be reduced, thereby reducing power consumption while maintaining the display quality. In this case, the direction D1 can be set to be approximately the vertical direction of the user's line of sight when the user wears a display device such as a head-mounted display including the light-emitting device 100.

[0051] In the present disclosure, one lens 117 and one light-emitting portion 132 are provided for each of the plurality of light-emitting elements 101, so the plurality of light-emitting elements 101 do not share the lens 117 and the light-emitting portion 132. It can also be understood that the lens 117 and the light-emitting portion 132 are provided in a one-to-one relationship. From another perspective, in the orthogonal projection onto the main surface 151 of the substrate 108, the center of one lens 117 overlaps with the center of one light-emitting portion 132 and does not overlap with the centers of two or more light-emitting portions 132. In the orthogonal projection onto the main surface 151 of the substrate 108, the center of one lens 117 overlaps with the center of one electrode 109 and does not overlap with the centers of two or more electrodes 109. In order to enhance the light extraction efficiency in the normal direction of the main surface 151 of the substrate 108, the vertex 141 of the lens 117 and the center of the light-emitting portion 132 can be arranged to overlap in the orthogonal projection onto the main surface 151 of the substrate 108. On the other hand, in order to enhance the light extraction efficiency in a specific direction, the center of the light-emitting portion 132 and the vertex 141 can be arranged while being shifted from each other. In the light-emitting region of the light-emitting device 100 in which the plurality of light-emitting elements 101 are arranged, the center of the light-emitting portion 132 and the vertex 141 can be arranged to be shifted from each other in the same direction throughout the entire region of the light-emitting region. Alternatively, the center of the light-emitting portion 132 and the vertex 141 can be arranged to overlap near the center of the light-emitting region, and the shift between the center of the light-emitting portion 132 and the vertex 141 can increase toward the outer periphery of the light-emitting region. In this case, the center of the light-emitting portion 132 and the vertex 141 can be shifted from each other in the direction toward the outer peripheral portion of the light-emitting device.

[0052] Figure 7 and Figure 8 are each shown in another arrangement example of the light-emitting device 100 according to the present embodiment similar to Figure 2 along Figure 1 A diagram of the cross section intercepted by line A-A'. (See diagram below.) Figure 1 As shown, when multiple substrates 108 are arranged in an interlaced pattern, the virtual straight line 137, which serves as the axis of symmetry of the optical component 102 parallel to direction D2, may not overlap with the center of the light-emitting portion 132. In this case, the vertex 141 of the lens 117 is arranged to be shifted in the direction from the center of the light-emitting portion 132 toward the virtual straight line 137, which serves as the axis of symmetry of the optical component 102 parallel to direction D2. This improves the light utilization efficiency in the optical component 102. Therefore, in an orthogonal projection onto the main surface 151 of the substrate 108, the vertex 141 of the lens 117 can be arranged to be spaced a first distance from the center of the light-emitting portion 132 in one direction of direction D1 (towards the virtual straight line 137, which serves as the axis of symmetry of the optical component 102 parallel to direction D2). In this case, in the orthogonal projection of the main surface 151 of the substrate 108, the center of the optical component 102 in direction D1 is arranged at a second distance from the center of the light-emitting portion 132 in one orientation of direction D1 (towards the virtual straight line 137, which is the axis of symmetry of the optical component 102 parallel to direction D2), which is greater than the first distance. In other words, in the orthogonal projection of the main surface 151 of the substrate 108, the distance in direction D1 between the center of the light-emitting portion 132 in the light-emitting element 101 and the vertex 141 of the lens 117 is shorter than the distance in direction D1 between the center of the light-emitting portion 132 and the center of the optical component 102.

[0053] Similarly, to improve the light utilization efficiency in the optical component 102, in the orthogonal projection of the main surface 151 of the substrate 108, the center of the pad 134 is arranged at a third distance greater than the first distance from the center of the light-emitting portion 132 in a direction opposite to that in direction D1 (opposite to the direction of the virtual straight line 137, which is parallel to the axis of symmetry of the optical component 102 and direction D2). That is, as... Figure 1 As shown, in the orthogonal projection of the main surface 151 of the substrate 108, the center of the light-emitting part 132 is arranged in the first direction between the center of the optical component 102 and the center of the pad 134.

[0054] Here, the distance X in direction D1 between the center of the light-emitting part 132 and the vertex 141 of the lens can be constant among the multiple light-emitting elements 101. Optionally, to improve light utilization efficiency, the distance X in direction D1 between the center of the light-emitting part 132 and the vertex 141 of the lens can be varied according to the distance to a virtual straight line 137 that serves as the axis of symmetry of the optical component 102, parallel to direction D2. Figure 7 and Figure 8In the arrangement shown, the distance X between the center of the light-emitting part 132 and the vertex 141 of the lens in the direction D1 increases as the distance between the light-emitting element 101 and the virtual straight line 137 increases.

[0055] With the center of the light-emitting part 132 and the vertex 141 of the lens 117 arranged in a shifted manner relative to each other, the shape of the lens 117 can be a portion of an approximate sphere, such as... Figure 7 As shown. Optionally, the shape of lens 117 can have an asymmetrical curvature, such as... Figure 8 As shown.

[0056] A more specific arrangement example of the light-emitting device 100 will be described here. For example... Figure 2 As shown, the light-emitting device 100 may include a substrate 108, an electrode 109, an organic layer 120, an electrode 111, an insulating layer 112, a protective layer 113, a planarization layer 114, and a lens 117. In this embodiment, the electrode 109 and the electrode 111 may each serve as a reflective layer for reflecting light as described later.

[0057] Electrode 109 is disposed on the main surface of substrate 108. Electrode 109 may also be referred to as the lower electrode. Organic layer 120 includes a light-emitting layer containing a light-emitting material. A portion of organic layer 120 (light-emitting layer) serves as the aforementioned light-emitting portion 132. Organic layer 120 is disposed between substrate 108 and lens 117 to cover electrode 109. Electrode 111 is disposed on organic layer 120. Electrode 111 may also be referred to as the upper electrode. The light-emitting layer is included in organic layer 120 and emits light according to the potential difference between electrode 109 and electrode 111.

[0058] An insulating layer 112 is disposed between adjacent electrodes 109 to insulate them from each other. The insulating layer 112 may also be referred to as a bank. The insulating layer 112 is disposed, for example, in the outer edge portion of the electrode 109 and on the electrode 109. The exposed portion of each electrode 109 not covered by the insulating layer 112 contacts the organic layer 120. The portion of the organic layer 120 in contact with the electrode 109 may be the aforementioned light-emitting portion 132. Therefore, as... Figure 2 As shown, multiple light-emitting portions 132, each corresponding to a plurality of electrodes 109, can be arranged in the light-emitting device.

[0059] A protective layer 113 is disposed on the electrode 111, and a planarization layer 114 is disposed on the protective layer 113. A lens 117 is disposed on the planarization layer 114. The lens 117 is arranged to correspond to the electrode 109.

[0060] There are no particular limitations on the material used for substrate 108, as long as the material can support the corresponding components of the light-emitting device, such as electrode 109, organic layer 120, and electrode 111. For example, glass, plastic, or silicon can be used as the material for substrate 108. Switching elements such as transistors, wiring patterns, and interlayer insulating films can be disposed on the main surface 151 of substrate 108.

[0061] Electrodes 109 can be arranged to correspond to light-emitting elements 101. Electrodes 109 can be transparent or opaque to light emitted from the light-emitting portion 132. If electrodes 109 are opaque, the material of electrodes 109 can be a metallic material in which the reflectance of the wavelength of light emitted from the light-emitting portion 132 is 70% or more. For example, metals such as aluminum (Al) or silver (Ag) can be used as the material of electrodes 109, or alloys obtained by adding silicon (Si), copper (Cu), nickel (Ni), or neodymium (Nd) to Al or Ag. Alternatively, electrodes 109 can be transparent electrodes made of ITO, IZO, AZO, or IGZO. In this case, electrodes 109 and an opaque reflective layer can be stacked. Electrode 109 can be a stacked electrode having a barrier electrode made of a metal or alloy thereof, such as titanium (Ti), tungsten (W), molybdenum (Mo), or gold (Au), or a stacked electrode having a transparent oxide film electrode made of ITO or IZO, as long as the desired reflectivity is obtained. To optimize the optical distance (described later), electrode 109 can be arranged with an insulating film between the reflective layer and the transparent conductive film.

[0062] Electrode 111 can be a semi-transmissive electrode, possessing the property of transmitting a portion of the light that has reached electrode 111 and reflecting the remainder of the light (i.e., semi-transmissive and semi-reflective). As a material for electrode 111, for example, a transparent material such as a transparent conductive oxide can be used. As a material for electrode 111, semi-transmissive materials of elemental metals (Al, Ag, or Au, etc.), alkali metals (lithium (Li), or cesium (Cs), etc.), alkaline earth metals (magnesium (Mg), calcium (Ca), or barium (Ba), etc.), or alloys containing these metals can be used. If a semi-transmissive material is used as the material for electrode 111, an alloy containing Mg or Ag as a main component can be used as a semi-transmissive material. Electrode 111 can have a stacked structure comprising multiple layers made of the above-described materials, provided it has appropriate transmittance. Figure 2 In the arrangement shown, an electrode 111 shared by multiple light-emitting units 132 is provided. However, this disclosure is not limited to this, and multiple electrodes 111 respectively corresponding to multiple light-emitting units 132 can be arranged.

[0063] One of electrodes 109 and 111 is used as an anode, and the other is used as a cathode. For example, electrode 109 can be used as an anode, and electrode 111 can be used as a cathode. Alternatively, for example, electrode 109 can be used as a cathode, and electrode 111 can be used as an anode.

[0064] The organic layer 120 can be formed using known techniques such as deposition or spin coating. The organic layer 120 can be formed from multiple layers. If the organic layer 120 is an organic compound layer, in addition to the light-emitting layer, the organic layer 120 may also include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, and an electron injection layer.

[0065] The light-emitting layer emits light when holes injected from the anode and electrons injected from the cathode recombine within it. The light-emitting layer can be a single layer or multiple layers. For example, if a light-emitting layer containing red luminescent material, a light-emitting layer containing green luminescent material, and a light-emitting layer containing blue luminescent material are combined, the light beams (red, green, and blue light) from each light-emitting layer can be mixed to obtain white light. Two types of light-emitting layers whose luminescent colors have a complementary color relationship can be combined (e.g., a light-emitting layer containing blue luminescent material and a light-emitting layer containing yellow luminescent material). Figure 2 In the illustrated light-emitting device 100, the light-emitting portions 132 emit light of the same color. However, this disclosure is not limited thereto. The material contained in the light-emitting layer and the arrangement of the light-emitting layer can be different for each light-emitting portion 132, such that the light-emitting layer emits light of a different color for each light-emitting portion 132. In this case, the light-emitting layer can be patterned for each light-emitting portion 132.

[0066] The light-emitting device 100 may have a so-called series structure, wherein the organic layer 120 includes multiple light-emitting layers and a charge-generating layer disposed between the multiple light-emitting layers. By having a series structure, multiple light-emitting layers emit light simultaneously, thereby improving luminous efficiency.

[0067] Here, a description assuming that electrode 109 reflects light emitted from light-emitting portion 132 will be given. In this case, in order to optimize the optical distance between the first reflective surface, which is the surface of electrode 109, and the light-emitting position of the organic layer 120 including the light-emitting layer, it is sufficient to satisfy the following equation (2). In equation (2), L r Φ represents the optical path length (optical distance) from the first reflecting surface, which serves as electrode 109, to the light-emitting position of the organic layer 120. rThis represents the phase shift when light of wavelength λ is reflected by the first reflecting surface, and takes a value greater than -π and less than 0. m is an integer greater than or equal to 0. The film thickness between electrode 109 and organic layer 120, and the film thickness of each layer of organic layer 120, can be designed to satisfy equation (2).

[0068] L r = (2 × m - (Φ r / π)) × (λ / 4)...(2)

[0069] Furthermore, if Φ s Let m2 represent the phase shift when light of wavelength λ is reflected by the second reflecting surface, and m2 be an integer greater than or equal to 0. Then, the optical distance L from the emission position to the second reflecting surface, which is the lower surface of electrode 111, is given by m2. s The following equation (3) must be satisfied. Here, Φ s Take values ​​greater than -π and less than 0.

[0070] L s = (2 × m2 - (Φ s / π)) × (λ / 4)...(3)

[0071] Therefore, the full-layer interference L needs to satisfy the following equation (4). In equation (4), Φ represents the phase shift Φ r and phase shift Φ s The sum of , and m3 is an integer greater than or equal to 0.

[0072] L = L r + L s = (2 × m3 - Φ / π) × (λ / 4)...(4)

[0073] In this example, the permissible range in equations (2) to (4) above is approximately λ / 8 or approximately 20 nm. Since it may be difficult to specify the light-emitting location in the organic layer 120, the interface on the first reflective side or the interface on the second reflective side of the light-emitting layer of the organic layer 120 is used instead of the light-emitting location in the above example. Considering the above permissible range, even if an interface is used instead, an enhanced light effect can be obtained.

[0074] The protective layer 113 is a dielectric layer. The protective layer 113 has transmissive properties, allowing light emitted from the light-emitting part 132 to pass through it. Furthermore, the protective layer 113 may contain an inorganic material with low permeability to oxygen and water from outside the light-emitting device. For example, the protective layer 113 may use materials such as silicon nitride (SiN), silicon oxynitride (SiON), or silicon oxide (SiO2). xThe protective layer 113 can be formed from inorganic materials such as alumina (Al2O3) or titanium dioxide (TiO2). In terms of protective performance, the protective layer 113 can be made from inorganic materials such as SiN, SiON, or Al2O3. The protective layer 113 can be formed using methods such as chemical vapor deposition (CVD), atomic layer deposition (ALD), or sputtering.

[0075] The protective layer 113 can have a single-layer structure using the above-described materials or a stacked structure using a combination of the above-described materials, as long as the protective layer 113 has sufficient moisture-blocking properties. For example, the protective layer 113 can have a stacked structure of a SiN layer formed using CVD and another high-density layer (e.g., Al2O3) formed using ALD. Furthermore, the protective layer 113 can include an organic layer, as long as it has moisture-blocking properties. For example, polyacrylate, polyimide, polyester, or epoxy resin can be used as the organic layer. Furthermore, in Figure 2 In the arrangement shown, a protective layer 113 shared by multiple light-emitting parts 132 is provided, but multiple protective layers 113 corresponding to multiple light-emitting parts 132 can be arranged respectively.

[0076] A planarization layer 114 is provided to flatten the surface of the protective layer 113. The planarization layer 114 may be formed of an inorganic material such as silicon oxide, or an organic material such as various resins, or may have a stacked structure of these materials. If the surface of the protective layer 113 has the flatness required for, for example, forming a lens 117, the planarization layer 114 may not be provided.

[0077] Lens 117 can be formed using exposure and development processes. More specifically, a material film (e.g., a photoresist film) is used to form lens 117, and the photoresist film is exposed and developed using a mask that includes a continuous gradient change. A gray mask can be used as the mask for forming lens 117. A regional gray mask can be used as the mask for forming lens 117, which allows for continuous gray-scale light illumination on the imaging surface by changing the dot density distribution of a light-shielding film with a resolution equal to or lower than the resolution of the exposure apparatus. The lens shape can be adjusted by etching back the lens 117 formed by the exposure and development processes. As described above, the surface of lens 117 has a convex shape in the direction away from the main surface of substrate 108. The surface shape of lens 117 can be part of a sphere (circle) or it can be aspherical.

[0078] The light-emitting element 101 is formed by a combination of the light-emitting portion 132 and the lens 117. If multiple light-emitting elements 101 are provided, their planar arrangement (when viewed from the normal direction of the main surface of the substrate 108) can be any of the following: stripe arrangement, square arrangement, delta arrangement, pentile arrangement, and Bayer arrangement. Here, consider the case where the light-emitting device 100 is used as a display panel, and a pixel (main pixel) includes multiple sub-pixels with different corresponding color components (e.g., sub-pixels displaying red, sub-pixels displaying green, and sub-pixels displaying blue). In this case, multiple light-emitting elements 101 can constitute one pixel. An arrangement in which the lens 117 transmits light beams of different colors can be adopted. Thus, the light-emitting device can perform full-color display. As a method to achieve full-color display, a method using a color filter and a light-emitting layer that emits white light can be employed. If a color filter is used, the manufacturing process of the light-emitting layer is easier than in cases where the light-emitting layer is patterned to emit different colors of light to each light-emitting unit 132, since multiple light-emitting units 132 can share the same light-emitting layer. However, the light-emitting layer can be patterned so that multiple light-emitting units 132 emit light beams of different colors. Furthermore, for each light-emitting unit 132 emitting light beams of different colors, the optical path length L between the first reflective layer and the second reflective layer (optical path length L) is... r or L s (They can be different.)

[0079] Figure 9 and Figure 10 An example of a light-emitting device 100 according to the present disclosure is shown, wherein pixels are arranged in a delta arrangement and set as sub-pixels of three types of unit pixels 133 for displaying red, green and blue respectively. Figure 9 This is an orthogonal projection view when viewed from a direction perpendicular to the main surface 151 of the substrate 108, and Figure 10 It is along Figure 9 The cross-sectional view taken by line C-C' in the diagram.

[0080] exist Figure 9 In the arrangement shown, the unit pixel 133 has a hexagonal shape. Figure 9 A unit pixel 133 is shown in thick lines. The outer edge 145 of the lens 117 matches the outer edge of the unit pixel 133. Since the area of ​​the unit pixel 133 occupied by the lens 117 can be increased, the light extraction efficiency can be improved.

[0081] exist Figure 9 and Figure 10In the arrangement shown, the color filter 115 is disposed on the planarization layer 114. However, this disclosure is not limited thereto, and the color filter 115 may be disposed on the protective layer 113. For example, the color filter 115 and the protective layer 113 may be arranged to contact each other without the planarization layer 114. Alternatively, for example, the color filter 115 and the protective layer 113 may be integrated. The color filter 115 may be formed on a support substrate different from the substrate 108, and the substrate may be bonded to face the protective layer 113, thereby forming the color filter 115 of the light-emitting device 100.

[0082] A planarization layer 114 is provided to flatten the surface of the protective layer 113. By providing the planarization layer 114, the color filter 115 can be precisely aligned with the corresponding light-emitting portion 132 using a photolithography process. As described above, by integrating the color filter 115 and the protective layer 113 without providing the planarization layer 114, the color filter 115 can be precisely aligned with the corresponding light-emitting portion 132 using a photolithography process.

[0083] exist Figure 9 and Figure 10 In the arrangement shown, color filters 115r, 115g, and 115b can be color filters configured to transmit light beams of different colors. For example, color filter 115r can transmit red light, color filter 115g can transmit green light, and color filter 115b can transmit blue light. Some or all of the multiple color filters 115 may not be arranged to configure the light-emitting device 100 to emit a single color of light. Alternatively, if an organic layer 120 is formed on each light-emitting element 101 to distinguish the color of the light beam emitted from the light-emitting portion 132, the light-emitting device 100 can be a device capable of full-color display.

[0084] In addition, Figure 9 and 10 In the arrangement shown, lens 117 is disposed on planarization layer 116. Planarization layer 116 is disposed to flatten the surface irregularities of color filter 115. However, lens 117 can also be disposed on color filter 115. In this case, planarization layer 116 is not required. Alternatively, lens 117 and color filter 115 can be integrated.

[0085] Furthermore, lens 117 can be disposed on protective layer 113 without color filter 115 and planarization layers 114 and 116. For example, lens 117 and protective layer 113 can be integrated. If lens 117 and protective layer 113 are integrated, the distance from lens 117 to light-emitting portion 132 can be shortened compared to the case where lens 117 is formed on another substrate and the substrate is bonded so that it faces protective layer 113. Therefore, the solid angle of light incident from light-emitting portion 132 to lens 117 can be increased, thereby improving light extraction efficiency. By integrating lens 117 and protective layer 113, the vertex 141 of each lens 117 can be precisely aligned with the corresponding light-emitting portion 132. For example, by integrating color filter 115, lens 117 and protective layer 113, light-emitting portion 132, color filter 115 and lens 117 can be precisely aligned respectively.

[0086] The stacking order of the color filter 115 and lens 117 can be appropriately selected. Figure 9 and Figure 10 In the arrangement shown, the color filter 115 is disposed on the side of the light-emitting unit 132 relative to the lens 117. In this arrangement, light emitted from the light-emitting unit 132 passes through the color filter 115 before incident on the lens 117. Therefore, light that causes color purity degradation (light with a large exit angle from the light-emitting unit) passes through the color filter 115 over a relatively long distance. Thus, the degradation of color purity when observing the light-emitting device from an oblique direction can be suppressed.

[0087] A light-emitting device can be manufactured by forming a color filter 115 and a lens 117 on a support substrate different from the substrate 108 and bonding the substrate to face the substrate 108, which includes the light-emitting portion 132. When the color filter 115 and the lens 117 are formed separately from the organic layer 120 (light-emitting layer), the degree of freedom (e.g., temperature, etc.) of the processing method for forming the color filter 115 and the lens 117 is increased, thereby increasing the design freedom of the color filter 115 and the lens 117. The color filter 115 and the lens 117 can be formed continuously on one support substrate, or the color filter 115 and the lens 117 can be formed on different support substrates. For example, the lens 117 and the color filter 115 can be bonded to the substrate 108 using a bonding member such as an adhesive. The bonding member can be arranged on the planarization layer 114, or it can be arranged on the protective layer 113 if the planarization layer 114 is not arranged.

[0088] Lens 117 can be formed on a support substrate different from substrate 108, and this substrate can be bonded to face substrate 108, which includes light-emitting portion 132. In this case, lens 117 can be fixed to substrate 108 at the end of the light-emitting device by a bonding member such as an adhesive, so as to provide space between lens 117 and protective layer 113 (or color filter 115). In this case, the space can be filled with resin. The refractive index of the resin can be lower than the refractive index n1 of lens 117.

[0089] Optionally, such as Figure 10 As shown, the optical path length (optical distance) can be adjusted according to the color transmitted by the color filter 115. Figure 10 In the arrangement shown, the electrode 109 transmits light emitted by the light-emitting portion 132, and a reflective layer 121 that reflects the light emitted by the light-emitting portion 132 is disposed between the electrode 109 and the substrate 108. Furthermore, in order to set the optical path length to an appropriate value, the thickness of the dielectric layer 122 disposed between the electrode 109 and the reflective layer 121 varies among the light-emitting elements 101, including color filters 115 configured to transmit different light components.

[0090] Examples and comparative examples of the light-emitting device 100 according to this embodiment will be described below.

[0091] Example 1

[0092] First, aluminum is formed on substrate 108, thereby forming a plurality of electrodes 109 corresponding to the light-emitting element 101. The plurality of electrodes 109 are as follows: Figure 2 The arrangement is shown. Next, a silicon oxide film with a thickness of 65 nm is formed as an insulating layer 112 to cover each of the plurality of electrodes 109. In the formed material film, an opening is formed in the central portion of each of the plurality of electrodes 109 to expose the electrode 109, thereby forming the insulating layer 112. In the light-emitting device of this example, the opening exposing the electrode 109 has an elliptical shape with a major axis of 2.4 μm and a minor axis of 1.2 μm. As described above, the opening formed in the insulating layer 112 ultimately corresponds to the light-emitting portion 132. That is, in an orthogonal projection onto the main surface 151 of the substrate 108, the size and shape of the opening can be consistent with the size and shape of the light-emitting portion 132. The light-emitting portion 132 is as follows: Figure 2 The arrangement shown has 133 pixels per unit. Figure 3 The diagram shows a square shape. The distance d1 between the centers of the light-emitting parts 132 is 4 μm.

[0093] After forming the insulating layer 112, an organic layer 120 is formed on the plurality of electrodes 109 and the insulating layer 112. More specifically, a hole injection layer with a thickness of 3 nm is formed using compound 1 (described below). On the hole injection layer, a hole transport layer with a thickness of 40 nm is formed using compound 2. On the hole transport layer, a light-emitting layer with a thickness of 20 nm is formed, such that compound 3, used as a host material, is contained in 99.8% by weight, and compound 4, used as a light-emitting dopant, is contained in 0.2% by weight. Next, a hole blocking layer with a thickness of 35 nm is formed on the light-emitting layer using compound 5. Next, an electron transport layer with a thickness of 22 nm is formed on the hole blocking layer using compound 6. Next, an electron injection layer with a thickness of 1 nm is formed on the electron transport layer using lithium fluoride.

[0094]

[0095] After forming the organic layer 120, a Mg / Ag alloy with a thickness of 10 nm is formed on the organic layer 120 as an electrode 111. The ratio of Mg to Ag is 1:1. Then, as a protective layer 113, a SiN layer with a refractive index of 1.97 and a thickness of 2.0 μm is formed on the electrode 111 by CVD. Next, a planarization layer 114 with a refractive index of 1.55 and a thickness of 0.2 μm is formed on the protective layer 113 by spin coating.

[0096] Next, a lens 117 with a refractive index of 1.52 is formed on the planarization layer 114 using an exposure and development process. The lens 117 is formed with a shape that is part of an approximate sphere. In a plan view from a direction perpendicular to the main surface of the substrate, the outer edge 145 of the lens 117 has a circular shape with a radius of 2 μm.

[0097] like Figure 1 As shown, an upright, equal-magnification lens array is provided as an optical component 102 on a plurality of substrates 108 arranged in an alternating pattern. In an orthogonal projection onto the main surface 151 of the substrates 108, the external shape of the optical component 102 is a rectangle with a short side of 1 mm and a long side of 420 mm. The distance between the optical component 102 and the vertex 141 of the lens 117 of the light-emitting element 101 in a direction perpendicular to the main surface 151 of the substrate 108 is 4 mm. The direction of the short side of the optical component 102 is parallel to the direction of the short axis of the light-emitting portion 132 (direction D1), and the direction of the long side of the optical component 102 is parallel to the direction of the long axis of the light-emitting portion 132 (direction D2).

[0098] Comparative Example 1

[0099] Except that the opening for exposing the electrode 109 is circular with a radius of 1.2 μm, the light-emitting device of the comparative example is formed with the same arrangement as the light-emitting device 100 described in Example 1. The area of ​​the light-emitting portion 132 between the light-emitting device 100 of Comparative Example 1 and the light-emitting device of Comparative Example 1 is twice as large as that in Comparative Example 1.

[0100] When the amount of light transmitted through the optical component 102 is the same between the light-emitting device 100 of Example 1 and the light-emitting device of Comparative Example 1, the power consumption of the light-emitting device of Comparative Example 1 is 1.95 times greater than that of the light-emitting device 100 of Example 1. Compared with the light-emitting device of the comparative example, the light-emitting device 100 having the arrangement according to this example can reduce power consumption.

[0101] Example 2

[0102] Except that the outer edge of the lens 117 is a square with a side length of 4 μm in the orthogonal projection onto the main surface 151 of the substrate 108, the light-emitting device 100 of Example 2 is formed with the same arrangement as the light-emitting device 100 described in Example 1. In this example, the outer edge 145 of the lens 117 matches the outer edge of the unit pixel 133 in the orthogonal projection onto the main surface 151 of the substrate 108.

[0103] In cases where the amount of light transmitted through the optical component 102 is the same between the light-emitting device 100 of Example 2 and the light-emitting device 100 of Example 1, the power consumption of the light-emitting device 100 of Example 2 is 0.80 times greater than that of the light-emitting device 100 of Example 1. Power consumption is further reduced by increasing the area of ​​the lens 117 in the unit pixel 133.

[0104] Comparative Example 2

[0105] Except that the shape of the outer edge 145 of the lens 117 is a square with a side length of 4 μm in the orthogonal projection onto the main surface 151 of the substrate 108, the light-emitting device of Comparative Example 2 is formed with the same arrangement as the light-emitting device described in Comparative Example 1. In this comparative example, the outer edge 145 of the lens 117 matches the outer edge of the unit pixel 133 in the orthogonal projection onto the main surface 151 of the substrate 108.

[0106] When the amount of light transmitted through the optical component 102 is the same between the light-emitting device of Comparative Example 2 and the light-emitting device 100 of Example 1, the power consumption of the light-emitting device of Comparative Example 2 is 1.56 times greater than that of the light-emitting device 100 of Example 1. Therefore, by appropriately adjusting the shape of the light-emitting part 132, the power consumption in the light-emitting device 100 can be effectively reduced.

[0107] Here, we will refer to Figures 11A to 18BThis section describes application examples of the light-emitting device 100 according to this embodiment to an image forming apparatus, a display apparatus, a photoelectric conversion apparatus, an electronic device, a lighting apparatus, a mobile body, and a wearable device.

[0108] Figures 11A to 11C This is a schematic diagram showing an example of an image forming apparatus using the light-emitting device 100 according to this embodiment. Figure 11A The image forming apparatus 926 shown includes a photosensitive element 927, an exposure light source 928, a developing unit 931, a charging unit 930, a transfer device 932, and a transport unit 933 (in Figure 11A The arrangement shown includes the conveyor rollers and the fixing device 935.

[0109] Light 929 is emitted from the exposure light source 928, and an electrostatic latent image is formed on the surface of the photosensitive member 927. The light-emitting device 100 can be applied to the exposure light source 928. The developing unit 931 can be used as a developing apparatus, which includes a toner or the like as a developing agent and applies the developing agent to the exposed photosensitive member 927. The charging unit 930 charges the photosensitive member 927. The transfer device 932 transfers the developed image to the printing medium 934. The transport unit 933 transports the printing medium 934. The printing medium 934 can be, for example, paper or film. The fixing device 935 fixes the image formed on the printing medium.

[0110] Figure 11B and Figure 11C Each of the above diagrams illustrates a plurality of light-emitting portions 936 arranged along the length of a long substrate in an exposure light source 928. The light-emitting device 100 can be applied to each of the light-emitting portions 936. That is, a plurality of light-emitting elements 101 (unit pixels 133) are arranged along the length of the substrate. Direction 937 is parallel to the axis of the photosensitive member 927. This direction matches the direction of the axis when the photosensitive member 927 is rotated. This direction 937 can also be referred to as the long axis direction of the photosensitive member 927.

[0111] Figure 11B The light-emitting part 936 is arranged along the long axis of the photosensitive member 927. Figure 11C Display as Figure 11B The illustrated variation of the arrangement of the light-emitting portions 936 shows that the light-emitting portions 936 are alternately arranged between the first and second columns in the column direction. The light-emitting portions 936 are arranged at different positions in the row direction between the first and second columns. In the first column, multiple light-emitting portions 936 are arranged spaced apart from each other. In the second column, the light-emitting portions 936 are arranged at positions corresponding to the spaces between the light-emitting portions 936 in the first column. Furthermore, in the row direction, multiple light-emitting portions 936 are arranged spaced apart from each other. Figure 11CThe arrangement of the light-emitting part 936 shown can be described, for example, as a grid pattern arrangement, an interlaced pattern arrangement, or a checkerboard pattern arrangement.

[0112] Figure 12 This is a schematic diagram showing an example of a display device using the light-emitting device 100 according to this embodiment. The display device 1000 may include a touch panel 1003, a display panel 1005, a frame 1006, a circuit board 1007, and a battery 1008, located between an upper cover 1001 and a lower cover 1009. Flexible printed circuits (FPCs) 1002 and 1004 are connected to the touch panel 1003 and the display panel 1005, respectively. Active components such as transistors are arranged on the circuit board 1007. If the display device 1000 is not a portable device, the battery 1008 is not required. Even when the display device 1000 is a portable device, it is not necessary to provide the battery 1008 at this location. The light-emitting device 100 may be applied to the display panel 1005. The light-emitting elements 101 (unit pixels 133) arranged in the light-emitting device 100 serving as the display panel 1005 operate in a state where they are connected to a control circuit that includes active components such as transistors arranged on the circuit board 1007.

[0113] Figure 12 The display device 1000 shown can be used as a display unit of a photoelectric conversion device (also called a camera device), which includes an optical unit with multiple lenses and an image sensor for receiving light that has passed through the optical unit and converting it photoelectrically into an electrical signal. The photoelectric conversion device may include a display unit for displaying information acquired by the image sensor. Furthermore, the display unit may be an externally exposed display unit or a display unit arranged in a viewfinder. The photoelectric conversion device may be a digital camera or a digital video camera.

[0114] Figure 13 This is a schematic diagram showing an example of a photoelectric conversion device using the light-emitting device 100 according to this embodiment. The photoelectric conversion device 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The photoelectric conversion device 1100 may also be referred to as a camera device. The light-emitting device 100 according to this embodiment can be applied to the viewfinder 1101 or the rear display 1102, which serves as a display unit. In this case, the light-emitting device 100 can display not only the image to be captured, but also environmental information and camera commands, etc. Examples of environmental information include the intensity and direction of external light, the speed of movement of the subject, and the possibility that the subject is obstructed by an object.

[0115] In many cases, the timing for video recording is very short, and it is best to display information as quickly as possible. Therefore, a light-emitting device 100, which arranges light-emitting elements 101 (unit pixel 133) using organic light-emitting materials such as organic EL elements, can be used in a viewfinder 1101 or a rear display 1102. This is because organic light-emitting materials have a high response speed. A light-emitting device 100 using organic light-emitting materials is more suitable for devices requiring high display speeds compared to a liquid crystal display device.

[0116] The photoelectric conversion device 1100 includes an optical unit (not shown). This optical unit has multiple lenses and forms an image on a photoelectric conversion element (not shown) that receives light passing through the optical unit and is housed in a housing 1104. The focus of the multiple lenses can be adjusted by adjusting their relative positions. This operation can also be performed automatically.

[0117] The light-emitting device 100 can be applied to the display unit of an electronic device. In this case, the display unit can have both display and operation functions. Examples of portable terminals include mobile phones such as smartphones, tablet computers, and head-mounted displays.

[0118] Figure 14 This is a schematic diagram showing an example of an electronic device using the light-emitting device 100 according to this embodiment. The electronic device 1200 includes a display unit 1201, an operation unit 1202, and a housing 1203. The housing 1203 may house circuitry, a printed circuit board having the circuitry, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type response unit. The operation unit 1202 may also be a biometric authentication unit for unlocking via fingerprint authentication, etc. Portable devices including a communication unit can also be considered communication devices. The light-emitting device 100 according to this embodiment can be applied to the display unit 1201.

[0119] Figure 15A and Figure 15B This is a schematic diagram showing an example of a display device using the light-emitting device 100 according to this embodiment. Figure 15A Display devices such as television monitors or PC monitors are displayed. The display device 1300 includes a frame 1301 and a display unit 1302. The light-emitting device 100 according to this embodiment can be applied to the display unit 1302. The display device 1300 may include a base 1303 supporting the frame 1301 and the display unit 1302. The base 1303 is not limited to... Figure 15A The form shown is acceptable. For example, the lower side of the frame 1301 can also be used as the base 1303. Furthermore, the frame 1301 and the display unit 1302 can be bent. In this case, the radius of curvature can be from 5,000 mm (inclusive) to 6,000 mm (inclusive).

[0120] Figure 15B This is a schematic diagram showing another example of a display device using the light-emitting device 100 according to this embodiment. Figure 15B The display device 1310 shown is foldable and is a so-called foldable display device. The display device 1310 includes a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The light-emitting device 100 according to this embodiment can be applied to both the first display unit 1311 and the second display unit 1312. The first display unit 1311 and the second display unit 1312 can also be a seamless display device. The first display unit 1311 and the second display unit 1312 can be divided by the bending point. The first display unit 1311 and the second display unit 1312 can display different images, and can also display a single image together.

[0121] Figure 16 This is a schematic diagram showing an example of an illumination device using the light-emitting device 100 according to this embodiment. The illumination device 1400 may include a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusion unit 1405. The light-emitting device 100 according to this embodiment can be applied to the light source 1402. The optical film 1404 may be a filter that improves the color rendering of the light source. When illuminating, etc., the light diffusion unit 1405 can project the light from the light source over a wide range by effectively diffusing the light from the light source. The illumination device may also include a cover on its outermost side as needed. The illumination device 1400 may include both or one of the optical film 1404 and the light diffusion unit 1405.

[0122] Lighting device 1400 is, for example, a device for illuminating the interior of a room. Lighting device 1400 can emit white light, natural white light, or light of any color from blue to red. Lighting device 1400 may also include light control circuitry for controlling these light components. Lighting device 1400 may also include a power supply circuit connected to the light-emitting device 100, which serves as the light source 1402. The power supply circuitry is a circuit for converting alternating current (AC) voltage to direct current (DC) voltage. The color temperature of white light is 4,200 K, and the color temperature of natural white light is 5,000 K. Lighting device 1400 may also include a color filter. Furthermore, lighting device 1400 may include a heat dissipation unit. The heat dissipation unit dissipates internal heat to the outside of the device, and examples include metals with high specific heat and liquid silicone.

[0123] Figure 17AThis is a schematic diagram of a car having a taillight as an example of a vehicle lighting device using the light-emitting device 100 according to this embodiment. The car 1500 has a taillight 1501, and may have a form in which the taillight 1501 is illuminated when braking or performing other operations. The light-emitting device 100 according to this embodiment can be used as a headlight serving as a vehicle lighting device.

[0124] The light-emitting device 100 according to this embodiment can be applied to a taillight 1501. The taillight 1501 may include a protective member for protecting the light-emitting device 100 used as the taillight 1501. The material of the protective member is not limited, as long as the material is a transparent material with sufficient strength, and an example is polycarbonate. The protective member may be made of a material obtained by mixing a furan dicarboxylic acid derivative or an acrylonitrile derivative into polycarbonate.

[0125] The vehicle 1500 may include a vehicle body 1503 and a window 1502 attached to the vehicle body 1503. This window may be a window for inspecting the front and rear of the vehicle, and may also be a transparent display such as a head-up display. For this transparent display, a light-emitting device 100 according to this embodiment can be used. In this case, the constituent materials of the electrodes, etc., of the light-emitting device 100 are formed of transparent components.

[0126] like Figure 17B As shown, the vehicle 1500 may include a steering wheel 1504 that controls the direction of movement of the moving body (vehicle), and a display unit 1505 mounted on the vehicle body 1503 that displays a map, the position of the moving body, the turning direction, and the view behind the moving body. The light-emitting device 100 according to this embodiment can be applied to the display unit 1505.

[0127] The vehicle 1500 is an example of a mobile body, and the mobile body according to this embodiment includes one or both of a drive force generating unit for generating a driving force primarily for moving the mobile body and a rotating body primarily for moving the mobile body. The drive force generating unit may be an engine, an electric motor, etc. The rotating body may be a tire, a wheel, a ship screw, an aircraft propeller, or a fan, etc. More specifically, the mobile body may be a bicycle, a car, a train, a ship, an aircraft, or a drone, etc. The mobile body may include a main body and a lighting device disposed in the main body. The lighting device may be used to notify the main body of its current location. The lighting device may include a light-emitting device 100 according to this embodiment. The display unit may include the light-emitting device 100 according to this embodiment.

[0128] Reference Figure 18A and Figure 18BFurther application examples of the light-emitting device 100 according to this embodiment are described. The light-emitting device 100 can be applied to systems that can be worn as wearable devices such as smart glasses, head-mounted displays (HMDs), or smart contact lenses. The camera display device used in such application examples includes a camera device capable of photoelectric conversion of visible light and a light-emitting device capable of emitting visible light.

[0129] Reference Figure 18A The description pertains to a pair of glasses 1600 (smart glasses) according to an application example. A camera device 1602, such as a CMOS sensor or SPAD, is disposed on the surface side of the lens 1601 of the glasses 1600. Furthermore, a light-emitting device 100 according to this embodiment is disposed on the back side of the lens 1601.

[0130] The glasses 1600 further includes a control device 1603. The control device 1603 serves as a power source for supplying power to the imaging device 1602 and the light-emitting device 100 according to various embodiments. Furthermore, the control device 1603 controls the operation of the imaging device 1602 and the light-emitting device 100. An optical system configured to converge light onto the imaging device 1602 is formed on the lens 1601.

[0131] Reference Figure 18B This description describes glasses 1610 (smart glasses) according to an application example. Glasses 1610 includes a control device 1612, and a camera device corresponding to a camera device 1602 and a light-emitting device 100 are mounted on the control device 1612. The camera device in the control device 1612 and an optical system configured to project light emitted from the light-emitting device 100 are formed in a lens 1611, and an image is projected onto the lens 1611. The control device 1612 serves as a power source for supplying power to the camera device and the light-emitting device 100, and controls the operation of the camera device and the light-emitting device 100. The control device 1612 may include a gaze detection unit for detecting the wearer's gaze. Gaze detection can be performed using infrared light. An infrared emitting unit emits infrared light towards the eyeball of a user who is looking at a displayed image. A camera unit including a light-receiving element detects the reflected light of the infrared light emitted from the eyeball, thereby obtaining an image of the eyeball. A light reduction unit is provided for reducing the light emitted from the infrared emitting unit to the display unit in a planar image, thereby reducing image quality degradation.

[0132] This method detects a user's gaze toward a displayed image from an image of the eye obtained by capturing infrared light. Any known method can be applied to gaze detection using images captured of the eye. As an example, a gaze detection method based on a Purkinje image obtained by reflecting light through the cornea can be used.

[0133] More specifically, gaze detection processing based on the pupillary-corneal reflection method is performed. Using the pupillary-corneal reflection method, a gaze vector representing the direction (rotation angle) of the eyeball is calculated based on the pupil image included in the captured image of the eyeball and the Purkinje image, thereby detecting the user's gaze.

[0134] The light-emitting device 100 according to embodiments of the present disclosure may include a camera device containing a light-receiving element, and control the display of an image based on the gaze information of a user from the camera device.

[0135] More specifically, the light-emitting device 100 determines the first visual field area that the user is looking at and the second visual field area other than the first visual field area based on gaze information. The first and second visual field areas can be determined by the control device of the light-emitting device 100, or they can be received from an external control device. Within the display area of ​​the light-emitting device 100, the display resolution of the first visual field area can be controlled to be higher than that of the second visual field area. That is, the resolution of the second visual field area can be lower than that of the first visual field area.

[0136] Furthermore, the display area includes a first display area and a second display area different from the first display area, and a higher priority area is determined from the first and second display areas based on gaze information. The first and second display areas can be determined by the control device of the light-emitting device 100, or they can be determined by an external control device. The resolution of the higher priority area can be controlled to be higher than the resolution of the areas other than the higher priority area. That is, the resolution of the relatively low priority area can be low.

[0137] Note that AI can be used to determine a primary visual field or a higher priority area. AI can be a model configured to use an image of the eye and the actual viewing direction of the eye in that image as teaching data to estimate the angle of the gaze and the distance from the target to the front of the gaze from the image of the eye. The AI ​​program can be held by the light-emitting device 100, a camera device, or an external device. If an external device holds the AI ​​program, the AI ​​program is transmitted to the light-emitting device 100 via communication.

[0138] When display control is based on gaze detection, smart glasses can be applied that further include a camera device configured to capture external images. The smart glasses can display the captured external information in real time.

[0139] According to this disclosure, techniques that help reduce power consumption can be provided.

[0140] While this disclosure has been described with reference to embodiments, it should be understood that this disclosure is not limited to the disclosed embodiments. The scope of the appended claims should be given the broadest interpretation to cover all such modifications and equivalent structures and functions.

Claims

1. A light-emitting device, comprising: substrate; And a light-emitting element, the light-emitting element being disposed on the main surface of the substrate and including a light-emitting portion comprising an organic layer and a lens disposed on the light-emitting portion. The light-emitting device further includes an optical component on the light extraction side of the light-emitting element, wherein light transmitted through the lens is incident on the optical component. In an orthogonal projection of the principal surface, the length of the optical component in the first direction is shorter than the length of the optical component in the second direction orthogonal to the first direction. In a virtual cross-section along the normal direction of the main surface and the first direction and passing through the vertex of the lens, the light beam emitted from the light-emitting part and transmitted through the lens includes light rays respectively incident on one end and the other end of the optical component in the first direction, and... In the orthogonal projection of the main surface, the length of the light-emitting part in the first direction is shorter than the length of the light-emitting part in the second direction.

2. The apparatus according to claim 1, wherein, The optical components include an upright, equal-magnification lens array.

3. The apparatus according to claim 1, wherein, The distance between the optical component and the vertex of the lens in the normal direction is greater than the distance between the vertex of the lens and the light-emitting part in the normal direction.

4. The apparatus according to claim 1, wherein, In the orthogonal projection of the principal surface, the length of the optical component passing through the center of the optical component has a minimum value in the first direction, and In the orthogonal projection of the main surface, the length of the light-emitting part passing through the center of the light-emitting part has a minimum value in the first direction.

5. The apparatus according to claim 1, wherein, In the orthogonal projection of the main surface, the shape of the outer edge of the light-emitting part is not similar to the shape of the outer edge of the unit pixel including the light-emitting part.

6. The apparatus according to claim 1, wherein, In the orthogonal projection of the main surface, the shape of the outer edge of the light-emitting part is not similar to the shape of the outer edge of the lens.

7. The apparatus according to claim 1, wherein, In the orthogonal projection of the main surface, the outer edge of the light-emitting part has a linearly symmetrical shape with two axes of symmetry: one parallel to the first direction and the other parallel to the second direction.

8. The apparatus according to claim 1, wherein, In the orthogonal projection of the main surface, the shape of the outer edge of the light-emitting part is double rotationally symmetric, and does not have more than triple rotational symmetry.

9. The apparatus according to claim 1, wherein, In the orthogonal projection of the main surface, the difference between the length of the lens in the first direction and the length of the light-emitting part in the first direction is greater than the difference between the length of the lens in the second direction and the length of the light-emitting part in the second direction.

10. The apparatus according to claim 1, wherein, In the orthogonal projection of the main surface, the vertex of the lens is arranged to be spaced a first distance from the center of the light-emitting part in one orientation of the first direction.

11. The device according to claim 10, wherein, in an orthogonal projection of the main surface, a center of the optical member in the first direction is arranged to be spaced from a center of the light-emitting portion by a second distance greater than the first distance in one orientation.

12. The device according to claim 10, further comprising a pad arranged on the main surface and electrically connected to the light-emitting portion, in, in an orthogonal projection of the main surface, a center of the pad is arranged to be spaced from a center of the light-emitting portion by a third distance greater than the first distance in another orientation in the first direction.

13. The device according to claim 1, wherein, when d1 is a shortest distance between centers of light-emitting portions of light-emitting elements adjacent to each other among a plurality of light-emitting elements, and d2 is a longest distance from a center of the lens to an outer edge of the lens, a relationship of d1 / 2 < d2 is satisfied.

14. An image forming apparatus comprising: A photosensitive member; An exposure light source configured to expose the photosensitive member; A developing device configured to apply a developer to the exposed photosensitive member; And a transfer device configured to transfer an image developed by the developing device to a printing medium, wherein the exposure light source includes the light-emitting device according to any one of claims 1 to 13.

15. A display device comprising: The light-emitting device according to any one of claims 1 to 13; And a control circuit connected to the light-emitting device.

16. A photoelectric conversion device, comprising: An optical unit including a plurality of lenses; An image sensor configured to receive light that has passed through the optical unit; And a display unit configured to display an image, wherein the display unit includes the light-emitting device according to any one of claims 1 to 13.

17. An electronic device comprising: A housing provided with a display unit; And a communication unit provided in the housing and configured to perform external communication, wherein the display unit includes the light-emitting device according to any one of claims 1 to 13.

18. A wearable device, comprising a display device configured to display an image, in, the display device includes the light-emitting device according to any one of claims 1 to 13.

19. A light-emitting device, comprising: A substrate; And a light-emitting element, the light-emitting element being arranged on a main surface of the substrate and including a light-emitting portion including an organic layer and a lens arranged on the light-emitting portion, wherein the light-emitting device further includes an optical member on a light extraction side of the light-emitting element, and light transmitted through the lens is incident on the optical member, an upper surface of the lens has a convex shape facing the optical member, in an orthogonal projection of the main surface, a length of the optical member in a first direction is shorter than a length of the optical member in a second direction orthogonal to the first direction, and in an orthogonal projection of the main surface, a length of the light-emitting portion in the first direction is shorter than a length of the light-emitting portion in the second direction.

20. The device according to claim 19, wherein, the optical member includes an erect equal magnification lens array.

21. The device according to claim 19, wherein, The distance between the optical member and the vertex of the lens in the normal direction of the principal plane is greater than the distance between the vertex of the lens and the light-emitting portion in the normal direction.

22. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the length of the optical member passing through the center of the optical member has a minimum value in the first direction, and in the orthogonal projection of the principal plane, the length of the light-emitting portion passing through the center of the light-emitting portion has a minimum value in the first direction.

23. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the shape of the outer edge of the light-emitting portion is not similar to the shape of the outer edge of the unit pixel including the light-emitting portion.

24. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the shape of the outer edge of the light-emitting portion is not similar to the shape of the outer edge of the lens.

25. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the shape of the outer edge of the light-emitting portion is a line-symmetric shape having two symmetry axes parallel to the first direction and parallel to the second direction.

26. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the shape of the outer edge of the light-emitting portion is doubly rotationally symmetric and does not have rotational symmetry of three or more folds.

27. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the difference between the length of the lens in the first direction and the length of the light-emitting portion in the first direction is greater than the difference between the length of the lens in the second direction and the length of the light-emitting portion in the second direction.

28. The device according to claim 19, wherein in the orthogonal projection of the principal plane, the vertex of the lens is arranged to be spaced apart from the center of the light-emitting portion by a first distance in one orientation in the first direction.

29. The device according to claim 28, wherein in the orthogonal projection of the principal plane, the center of the optical member in the first direction is arranged to be spaced apart from the center of the light-emitting portion by a second distance greater than the first distance in the one orientation.

30. The device according to claim 28, further comprising a pad arranged on the principal plane and electrically connected to the light-emitting portion, in, in the orthogonal projection of the principal plane, the center of the pad is arranged to be spaced apart from the center of the light-emitting portion by a third distance greater than the first distance in the other orientation in the first direction.

31. The device according to claim 19, wherein when d1 is the shortest distance between the centers of the light-emitting portions of the light-emitting elements adjacent to each other among the plurality of light-emitting elements and d2 is the longest distance from the center of the lens to the outer edge of the lens, the relationship d1 / 2 < d2 is satisfied.

32. An image forming apparatus comprising: A photosensitive member; An exposure light source configured to expose the photosensitive member; A developing device configured to apply a developer to the exposed photosensitive member; and a transfer device configured to transfer an image developed by the developing device to a printing medium, wherein the exposure light source includes the light-emitting device according to any one of claims 19 to 31.

33. A display device comprising: The light-emitting device according to any one of claims 19 to 31; and a control circuit connected to the light-emitting device.

34. A photoelectric conversion device, comprising: An optical unit including a plurality of lenses; an image sensor configured to receive light that has passed through the optical unit; and a display unit configured to display an image, wherein the display unit includes the light-emitting device according to any one of claims 19 to 31.

35. An electronic device comprising: A housing provided with a display unit; and a communication unit provided in the housing and configured to perform external communication, wherein the display unit includes the light-emitting device according to any one of claims 19 to 31.

36. A wearable device, which includes a display device configured to display an image, in, wherein the display device includes the light-emitting device according to any one of claims 19 to 31.

37. A light-emitting device, comprising: A substrate; and a plurality of light-emitting elements arranged on a main surface of the substrate, each of the light-emitting elements including a light-emitting portion and a lens arranged corresponding to the light-emitting portion, wherein, in an orthogonal projection of the main surface, a center of the light-emitting portion is arranged to overlap with the corresponding lens, in the orthogonal projection of the main surface, a length of the light-emitting portion in a first direction is shorter than a length of the light-emitting portion in a second direction orthogonal to the first direction, and when d1 represents a shortest distance between centers of light-emitting portions of adjacent light-emitting elements among the plurality of light-emitting elements and d2 represents a longest distance from a center of the lens to an outer edge of the lens, a relationship of d1 / 2 < d2 is satisfied.

38. The device according to claim 37, wherein, in the orthogonal projection of the main surface, a difference between a length of the lens in the first direction and a length of the light-emitting portion in the first direction is greater than a difference between a length of the lens in the second direction and a length of the light-emitting portion in the second direction.

39. The device according to claim 37, wherein, in the orthogonal projection of the main surface, a shape of an outer edge of the light-emitting portion is not similar to a shape of an outer edge of a unit pixel including the light-emitting portion.

40. The device according to claim 37, wherein, in the orthogonal projection of the main surface, a shape of an outer edge of the light-emitting portion is not similar to a shape of an outer edge of the lens.

41. The device according to claim 37, wherein, in the orthogonal projection of the main surface, a shape of an outer edge of the light-emitting portion is a line-symmetric shape having two symmetry axes parallel to the first direction and parallel to the second direction.

42. The device according to claim 37, wherein, in the orthogonal projection of the main surface, a shape of an outer edge of the light-emitting portion is doubly rotationally symmetric and does not have rotational symmetry of three or more folds.

43. The apparatus of claim 37, further comprising an optical component on the light extraction side of the plurality of light-emitting elements, wherein light transmitted through the lens is incident on the optical component. in, In the orthogonal projection of the main surface, the length of the optical component in the first direction is shorter than the length of the optical component in the second direction.

44. The apparatus according to claim 43, wherein, In a virtual cross-section along the normal direction of the main surface and the first direction and passing through the vertex of the lens, the light beam emitted from the light-emitting part and transmitted through the lens includes light rays that are respectively incident on one end and the other end of the optical member in the first direction.

45. An image forming apparatus comprising: Photosensitive components; An exposure light source configured to expose the photosensitive element; A developing apparatus configured to apply developer to an exposed photosensitive element; And a transfer device configured to transfer an image developed by the developing apparatus to a printing medium. The exposure light source includes a light-emitting device according to any one of claims 37 to 44.

46. ​​A display device comprising: The light-emitting device according to any one of claims 37 to 44; And a control circuit connected to the light-emitting device.

47. A photoelectric conversion device, comprising: An optical unit comprising multiple lenses; an image sensor configured to receive light that has passed through the optical unit; and the display unit configured to display images, The display unit includes a light-emitting device according to any one of claims 37 to 44.

48. An electronic device comprising: The housing is equipped with a display unit; And a communication unit disposed within the housing and configured for external communication. The display unit includes a light-emitting device according to any one of claims 37 to 44.

49. A wearable device comprising a display device configured to display an image. in, The display device includes a light-emitting device according to any one of claims 37 to 44.

Images