Light-emitting device, display device, electronic apparatus, luminaire, and mobile body

Abstract

To provide a display device capable of stabilizing display quality irrespective of the sight line position of a user even when improving utilization efficiency of the light emitted from a light-emitting device.SOLUTION: A light-emitting device comprises: a substrate including a principal surface; a first light-emitting element and a plurality of second light-emitting elements arranged on the principal surface; and a first lens and a second lens. In a direction parallel to the principal surface, the distance between the middle point in the light-emitting area of the second light-emitting element and the apex of the second lens is greater than the distance between the middle point in the light-emitting area of the first light-emitting element and the apex of the first lens. The light-emitting device further comprises: a first light-emitting area including the first light-emitting element; and a second light-emitting area including the plurality of second light-emitting elements and surrounding the first light-emitting area with the plurality of second light-emitting elements. The light-emitting area of the second light-emitting elements is larger than the light-emitting area of the first light-emitting element.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a light-emitting device having an optical member such as a microlens, and to a display device, electronic device, lighting device, and mobile object having the same. [Background technology]

[0002] An organic light-emitting element is an element having a first electrode, a second electrode, and an organic compound layer disposed therebetween, and is a light-emitting device that emits light by injecting carriers from the first electrode and the second electrode. Since an organic light-emitting element is a lightweight and flexible device, in recent years, display devices and the like equipped with an organic light-emitting element have been attracting attention. In order to increase the resolution of such display devices, a method using an organic light-emitting element that emits white light and a color filter (hereinafter referred to as a white+CF method) is known. In the white+CF method, an organic layer is formed on the entire surface of a substrate, and therefore it is relatively easy to increase the resolution of the pixel size, the pitch between pixels, etc., compared to a method in which an organic layer is formed for each color using a metal mask.

[0003] Patent Document 1 describes a display device including an OLED and an outcoupling component, and describes the positional relationship between the outcoupling component and the OLED light-emitting region.

[0004] Patent Document 2 describes a light-emitting device having a microlens array and a group of light-emitting elements, and describes changing the distance between the light-emitting central axis of the light-emitting element and the central axis of the lens. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-017013 A [Patent Document 2] JP 2020-004868 A Summary of the Invention [Problem to be solved by the invention]

[0006] Patent document 1 describes the positional relationship, such as the distance between the light-emitting element and the microlens, in order to increase the intensity in the front direction, and Patent document 2 describes changing the distance between the central axis of the light-emitting element and the central axis of the microlens in order to equalize the amount of light for each emission direction.

[0007] However, there is no description of changing the size of the light-emitting region in consideration of the power consumption of the light-emitting device and the display quality of the light-emitting device.

[0008] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to provide a display device that uses optical components such as microlenses to improve light utilization efficiency and reduce power consumption, while maintaining stable display quality regardless of the user's line of sight. [Means for solving the problem]

[0009] The present invention provides a light-emitting diode having a substrate having a main surface, a first light-emitting element and a second light-emitting element arranged on the main surface, a first lens overlapping the substrate in a planar view with the first light-emitting element, and a second lens overlapping the second light-emitting element in a planar view, wherein a distance between a midpoint of a light-emitting region of the second light-emitting element and a vertex of the second lens is greater than a distance between a midpoint of the light-emitting region of the first light-emitting element and the vertex of the first lens in a direction parallel to the main surface, a first light-emitting region including the first light-emitting element, The second light emitting element is provided in a plurality of portions. a second light-emitting region surrounding the first light-emitting region, The light emitting device is characterized in that the light emitting area of ​​the second light emitting element is larger than the light emitting area of ​​the first light emitting element. Effect of the Invention

[0010] According to the present invention, it is possible to provide a light emitting device that maintains stable display quality regardless of the user's line of sight even when a lens is used to reduce power consumption. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2A is a cross-sectional view showing an example of a first light-emitting element included in a light-emitting device according to one embodiment of the present invention, and FIG. 2B is a plan view of the first light-emitting element in FIG. [Diagram 2] FIG. 2A is a cross-sectional view showing an example of a second light-emitting element included in a light-emitting device according to one embodiment of the present invention, and FIG. 2B is a plan view of the second light-emitting element in FIG. [Diagram 3] FIG. 11 is a cross-sectional view showing an example of a comparative embodiment. [Figure 4] 1A is a plan view of a light emitting device according to one embodiment of the present invention, and FIG. [Diagram 5] 1 is a cross-sectional view showing an example of a light-emitting device according to an embodiment of the present invention. [Figure 6] FIG. 1 is a cross-sectional view showing an example of the effect of the present invention. [Figure 7] FIG. 1 is a schematic diagram illustrating an example of a display device according to an embodiment of the present invention. [Figure 8] 1A is a schematic diagram illustrating an example of an imaging device according to an embodiment of the present invention, and FIG. 1B is a schematic diagram illustrating an example of an electronic device according to an embodiment of the present invention. [Figure 9] 1A is a schematic diagram illustrating an example of a display device according to an embodiment of the present invention, and FIG. 1B is a schematic diagram illustrating an example of a foldable display device. [Figure 10] 1A is a schematic diagram showing an example of an illumination device according to an embodiment of the present invention, and FIG. 1B is a schematic diagram showing an example of an automobile having a vehicle lamp according to an embodiment of the present invention. [Figure 11] 1 is an example of smart glasses according to an embodiment of the present invention. [Figure 12] 1A is a conceptual diagram showing the relationship between a display device and an observer when used with an optical system in the case where the observer's line of sight is at the center of the display panel, and FIG. 1B is a conceptual diagram showing the relationship between a display device and an observer when used with an optical system in the case where the observer's line of sight is at the edge of the display panel. [Figure 13]1A and 1B are diagrams showing the relationship between the panel view angle and the radiation angle on the display panel under the overall viewing condition and the gaze condition, respectively, and the relationship between the panel view angle and the difference between the maximum and minimum radiation angles under the overall viewing condition and the gaze condition, respectively. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A light-emitting device according to one embodiment of the present invention comprises a substrate having a main surface, a first light-emitting element and a second light-emitting element arranged on the main surface, a first lens onto which the light emitted from the first light-emitting element is incident, and a second lens onto which the light emitted from the second light-emitting element is incident, wherein in a direction parallel to the main surface, the distance between the midpoint of the light-emitting region of the second light-emitting element and the vertex of the second lens is greater than the distance between the midpoint of the light-emitting region of the first light-emitting element and the vertex of the first lens, and wherein the light-emitting region of the second light-emitting element is greater than the light-emitting region of the first light-emitting element.

[0013] The second light-emitting element may be a light-emitting element that emits light toward a wide angle of the display device. In the second light-emitting element, the optical member is arranged shifted from that of the first light-emitting element in order to emit light at a wide angle. That is, the distance between the midpoint of the light-emitting region of the second light-emitting element and the apex of the second lens in a cross section including the lower electrode, the first optical member, and the second optical member is greater than the distance between the midpoint of the light-emitting region of the first light-emitting element and the apex of the first lens in the cross section.

[0014] In this case, the range of radiation angles required for the second light-emitting element to stabilize the display quality regardless of the user's line of sight is larger than that of the first light-emitting element, because the radiation angle is determined by the positional relationship between the optical member and the micro light sources in the light-emitting area, and the larger the light-emitting area, the larger the radiation angle range.

[0015] In order to stabilize the display quality regardless of the user's gaze position, the second light-emitting element has a larger light-emitting area than the first light-emitting element. Although the radiation intensity for the input current decreases as the light-emitting area becomes larger, the display quality is stabilized in a wide radiation angle range accompanying the rotation of the user's eyeball.

[0016] In this specification, the lens may be an optical member such as a so-called microlens, and the light-emitting layer may be composed of an organic compound or an inorganic compound.

[0017] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that the following embodiments do not limit the present invention. Although multiple configurations are described in the embodiments, not all of these multiple configurations are necessarily essential to the invention, and multiple configurations may be combined arbitrarily. In the drawings, the same reference numerals are used for the same or similar configurations, and duplicated descriptions may be omitted.

[0018] For example, in the white+CF method, the color filters may be color filters that transmit red, green, and blue light, respectively. The additive color mixing of these sub-pixels enables the organic EL light-emitting device to display full color. In the following embodiment, an example of a color filter that transmits three colors of light is shown, but the present invention is not limited to this.

[0019] In this specification, the lens may be provided on the light extraction side of the light emitting device, and the convex direction of the lens may refer to the light extraction side. When the light emitting device emits light from both the lower electrode side and the upper electrode side of the light emitting element, either direction can be referred to as the light extraction side. The microlens shape may be a spherical lens, an aspherical lens, or a digital microlens.

[0020] The planar array may be any of the following: stripe array, square array, delta array, and Bayer array. The delta array is particularly desirable because it allows for highly precise arrangement of ML shapes with high lens power or light extraction efficiency. In addition, by arranging the main pixels in a matrix, a light-emitting device with a high number of pixels can be realized.

[0021] An example of an organic light-emitting device used together with an optical system is a head-mounted display. FIGS. 12(a) and 12(b) are schematic diagrams showing light rays from an organic light-emitting device 10 to a user's eyeball 30. FIG. 12(a) corresponds to a case where the user's line of sight is at the center 1701 of the panel, which is referred to here as a general viewing condition. Light from the panel edge 1702 is viewed as peripheral vision, so sensitivity to luminance drop and color shift is low. However, since the user uses the device for a long time under the general viewing condition, it is preferable to maintain the display performance under the general viewing condition. On the other hand, FIG. 12(b) corresponds to a case where the user rotates the eyeball and moves the gaze point, which is referred to here as a gaze condition. FIG. 12(b) illustrates a case where the user gazes at the panel edge 1702. Although the user does not gaze at the panel edge for a long time, the user perceives it in the central vision, so sensitivity to luminance drop, color shift, and the like is high. Thus, in a head-mounted display, a design that maintains display performance under the general viewing condition and the gaze condition is preferable.

[0022] Fig. 13(a) shows, as an example of design, the relationship between the angle of view on the panel and the radiation angle of light rays considered under the overall viewing condition and the gaze condition. The panel angle of view of 0% on the horizontal axis of Fig. 13(a) corresponds to the center 1701 of the panel in Fig. 12(a), and the panel angle of view of 100% corresponds to the panel edge 1702 in Fig. 12(a). The solid and dashed lines in Fig. 13(a) correspond to the radiation angles under the gaze condition and the overall viewing condition, respectively, and the error bars indicate the positional deviation of the head mount relative to the user's eyeball. The absolute value on the vertical axis of Fig. 13(a) may change depending on the distance between the organic light-emitting device 10 and the eyeball 30, the FOV, etc., but the relative relationship is constant.

[0023] As can be seen from FIG. 13(a), the larger the panel angle of view, the larger the required radiation angle is, both under the overall viewing condition and the gaze condition. The radiation angle under the gaze condition is larger than that under the overall viewing condition by the amount of eyeball rotation, and this tendency becomes more pronounced as the panel angle of view becomes larger. FIG. 13(b) shows the relationship between the difference between the minimum radiation angle under the overall viewing condition and the maximum radiation angle under the gaze condition, and the panel angle of view. It can be seen from the figure that the difference between the maximum angle and the minimum angle becomes larger as the panel angle of view becomes larger. The inventors have found that when used in a head mounted display, a wider radiation angle characteristic is preferable at the panel end. In one aspect of the present invention, a display area has a first region and a second region arranged surrounding the first region, and the light emitting region of the light emitting element in the second region is larger than the light emitting region of the light emitting element in the first region, thereby improving the display quality.

[0024] The light-emitting element may have a microlens. In the case where the microlens is included, the light-emitting device may have a second light-emitting element having a larger distance between the central axis of the light-emitting region and the central axis of the microlens than the first light-emitting element in a cross section perpendicular to the main surface of the substrate. The second light-emitting element may have a larger light-emitting region than the first light-emitting element.

[0025] The first light emitting element may have a smaller first electrode than the second light emitting element, and the electrode is not too large compared to the light emitting region.

[0026] (Embodiment 1) Fig. 1 is a diagram showing a first light-emitting element of a light-emitting device according to the present invention, in which Fig. 1(a) is a cross-sectional view of the first light-emitting element, and Fig. 1(b) is a plan view of the first light-emitting element of Fig. 1(a).

[0027] The light-emitting device of FIG. 1(a) is composed of a lower electrode 101, a functional layer 102 including a light-emitting layer, an upper electrode 103, a protective layer 104, a planarizing film 105, a microlens 106, and an insulating layer 107 covering both ends of the lower electrode on a substrate 100. Of the insulating layers, the insulating layer in contact with one end may be called a first insulating layer, and the insulating layer in contact with the other end may be called a second insulating layer. This insulating layer is also called a pixel separation film or a bank. The cross-sectional view of FIG. 1(a) is a cross-section perpendicular to the main surface of the substrate. The plan view of FIG. 1(b) is a plan view observed from a direction perpendicular to the main surface of the substrate. Here, the main surface of the substrate is the surface on which the light-emitting element is provided. An insulating film such as an oxide film may be provided between the substrate and the light-emitting element on the surface on which the light-emitting element is provided. A transistor, a capacitance element, a reflective film, etc. may be provided in the insulating film.

[0028] The end of the lower electrode is in contact with and covered by an insulating layer 107. The portion of the lower electrode that is not in contact with the insulating layer may be in contact with the functional layer. The region where the lower electrode and the functional layer are in contact with each other is a light-emitting region 108a that emits light when an electric field is applied between the lower electrode and the upper electrode.

[0029] The light-emitting region may be identified by observing the emission of light when an electric field is applied from the same direction as in Figure 1(b). The light-emitting region may also be identified by measuring the distance from an edge of the first insulating layer covering the left edge of the lower electrode to an edge of the second insulating layer covering the right edge of the lower electrode in Figure 1. The edge of the insulating layer may be the contact point between the insulating layer and the lower electrode.

[0030] 1(a) shows an example in which the positional relationship between the microlens 106 and the light-emitting area 108a is optimized so that light is emitted in the front direction, but since the light-emitting area 108a is smaller than the light-emitting area 108b, almost all of the components are emitted in the front direction of the panel. In other words, the range of the panel radiation angle is relatively narrow.

[0031] 1(b), the light emitting region 108a is surrounded by an insulating layer 107. In this embodiment, the light emitting region is hexagonal, but may be other polygonal or circular. For example, a stripe arrangement may be used in which rectangular RGB light emitting regions are arranged to emit light.

[0032] Fig. 2 is a diagram showing a second light-emitting element of a light-emitting device according to the present invention. Fig. 2(a) is a cross-sectional view of the second light-emitting element, and Fig. 2(b) is a plan view of the second light-emitting element of Fig. 2(a). The cross-sectional view and plan view are similar to Fig. 1.

[0033] The second light-emitting element has a similar configuration to the first light-emitting element. In the direction parallel to the main surface of the substrate, the distance between the midpoint of the light-emitting region 108b and the vertex of the microlens 106 in the second light-emitting element is greater than the distance between the midpoint of the light-emitting region 108a and the vertex of the microlens 106 in the first light-emitting element. If the position of the microlens in the first light-emitting element is the normal position, it can also be said that the position of the microlens in the second light-emitting element is shifted.

[0034] The apex of the microlens 106 is the position farthest from the principal surface of the substrate in a plane perpendicular to the principal surface of the substrate in the case of a convex lens. In the case of a concave lens, it is the position closest to the principal surface in a plane perpendicular to the principal surface of the substrate. The apex of the lens can also be said to be the center of the lens in a cross section parallel to the principal surface of the substrate.

[0035] The light-emitting region 108b of the second light-emitting element is larger than the light-emitting region 108a of the first light-emitting element. That is, 108b in Fig. 2(a) is longer as a line segment than 108a in Fig. 1(a). This can also be said to be because the area in which the functional layer is in contact with the lower electrode is larger.

[0036] Since light-emitting area 108b is large, the radiation angle of light passing through microlens 106 changes depending on the position of the point light source present within light-emitting area 108b. In other words, the range of panel radiation angles is wide. In this way, by enlarging the light-emitting area of ​​the second light-emitting element, it is possible to stabilize the display quality regardless of the user's line of sight position.

[0037] On the other hand, FIG. 2(b) shows one embodiment of light-emitting region 108b. In this embodiment, 108b has two sides, left and right, on the paper, outside the hexagon compared to 108a. That is, the light-emitting region of the second light-emitting element is hexagonal, and at least one side of the hexagon is outside the hexagon compared to the light-emitting region of the first light-emitting element. The two sides of the hexagon are the pair of sides that are farthest from each other among the sides of the hexagon.

[0038] In this embodiment, two sides of the hexagon 108a are arranged inside the hexagon compared to 108b, but it is sufficient that at least one side of the polygon is arranged inside the polygon compared to the light-emitting region 108b of the first light-emitting element.

[0039] [Comparative form] Fig. 3 is a cross-sectional view showing a comparative embodiment. In this embodiment, the positional relationship between the light-emitting region of the second light-emitting element and the optical member is different from that of the first light-emitting element, but the light-emitting region of the second light-emitting element is the same size as that of the first light-emitting element. The difference in the positional relationship of the optical member in the second light-emitting element from that of the first light-emitting element may be said to mean that the optical member is misaligned. The direction in which the optical member is misaligned may be the direction in which light emitted from the light-emitting layer is desired to be bent.

[0040] As shown in Figure 3, all the light from the light-emitting area 108b is bent in a certain angle direction, so the distribution of radiation angles is smaller than that in Figure 2(a). Therefore, the peripheral vision may become dark, and this form is not desirable for specifications that place importance on overall vision conditions.

[0041] From the above, by enlarging the light-emitting area of ​​the second light-emitting element as shown in Figure 2(a), a wide radiation angle range can be secured, making it possible to stabilize the display quality even if the user's line of sight changes over a wide range.

[0042] In addition, in the peripheral region of the display device, a display device that uses light directed in a diagonal direction to the display surface is often a display device that has a display unit and an optical system through which the user can view the display unit. In such a display device, a first light-emitting element that can concentrate light more in the front direction is often arranged in the central region of the panel. This is because the luminance of the display device is set to the value of the center of the panel. In addition, not emitting unused light has the following additional effects. For example, if unused light enters the optical system 20 in FIG. 10, it becomes stray light and may degrade the quality of the display. In the above embodiment, there is also an effect of reducing stray light because light that does not contribute to the display is not emitted.

[0043] In this embodiment, a light emitting device having a macrolens is given as an example, but as long as the light emitting area has a small contribution to the light emission of the display device, the light emitting area may be small, regardless of the presence or absence of optical components such as a microlens.

[0044] For example, when a light emitting device has a first light emitting region and a second light emitting region surrounding the first light emitting region, and a light emitting element included in the second light emitting region is required to have a wide radiation angle characteristic for the light emitted by the light emitting device, the light emitting region of the light emitting element included in the second light emitting region may be made larger.

[0045] The second light-emitting region surrounds the first light-emitting region, and therefore includes a region disposed on the outer side of the display device than the first light-emitting region. Here, the outer side means that when multiple light-emitting elements are disposed on a substrate, another light-emitting element closer to an edge of the substrate than a certain light-emitting element is called an outer light-emitting element. Here, the edge of the substrate refers to the edge of the substrate closest to the certain light-emitting element.

[0046] According to this embodiment, the radiation angle range of the second light emitting element can be widened, so that good display quality can be provided regardless of the user's line of sight while maintaining low power consumption.

[0047] [Embodiment 2] Fig. 4 is a diagram showing an example of a light-emitting device according to an embodiment of the present invention. Fig. 4(a) is a plan view of the light-emitting device from a direction perpendicular to the main surface of the substrate, similar to Fig. 1(b). The display region 200 has a plurality of light-emitting elements. The positional relationship between the light-emitting region and the microlenses will be explained using a central portion A' and a peripheral portion A.

[0048] FIG. 4(b) is a part of a cross-sectional view taken along a straight line passing through A-A' in FIG. 4(a). In the cross-section, a part of the light-emitting element is omitted. The positional relationship between the microlens 106 and the light-emitting region changes from A' to A. Specifically, when the positional relationship between the light-emitting region 108a and the microlens 106 directly above the light-emitting region 108a is taken as a reference, the positional relationship between the light-emitting region 108c and the microlens directly above the light-emitting region 108c is such that the microlens is relatively shifted to the left in the figure by a microlens shift amount of 300a. The light-emitting region 108c is larger than the light-emitting region 108a. Similarly, the light-emitting region 108d is larger than the light-emitting region 108c, and the microlens directly above the light-emitting region 108d is relatively shifted by 300b. Furthermore, the light-emitting region 108e is larger than the light-emitting region 108d, and the microlens directly above the light-emitting region 108e is relatively shifted by 300c.

[0049] In this embodiment, the first light emitting element has a light emitting region 108a, the second light emitting element has a light emitting region 108c, the third light emitting element has a light emitting region 108d, and the fourth light emitting element has a light emitting region 108e.

[0050] 4(a), for example, a light emitting element closer to A than to A' is an outer element. Also, a light emitting element farther from A' can be said to be an outer light emitting element.

[0051] In this manner, the deviation of the microlenses may continuously increase from the center A' to the outer periphery A of the display area.

[0052] Also, the amount of change in the amount of deviation may be greater as it approaches A. This means that the difference between the amount of deviation at 108e and the amount of deviation at 108d is greater than the difference between the amount of deviation at 108d and the amount of deviation at 108c. In this case, the amount of deviation at point A does not have to be 0. In other words, the center of the lens does not have to be located at the center of the display device.

[0053] The amount of change in the amount of deviation may be smaller as it approaches A. This means that the difference between the amount of deviation at 108e and the amount of deviation at 108d is smaller than the difference between the amount of deviation at 108d and the amount of deviation at 108c. The amount of change is smaller, and the amount of deviation at 108e is larger. In this case, the amount of deviation at point A does not have to be 0. In other words, the center of the lens does not have to be located at the center of the display device.

[0054] By increasing the light-emitting region continuously or stepwise in this manner, a light-emitting device with high display quality can be provided.

[0055] [Embodiment 3] 5 is a cross-sectional schematic diagram of a light-emitting device according to one embodiment of the present invention. In addition to the first embodiment, color filters 109a to 109c are arranged on the planarization layer 105. Each pixel including the color filters 109a to 109c is regarded as a sub-pixel, and the three sub-pixels can be regarded as one main pixel. When a pixel includes a color filter, the light passing through the color filter may be light emitted by the light-emitting layer of the pixel. The sub-pixels are particularly preferably of three colors, red, green, and blue, and additive color mixing of these sub-pixels enables full-color display.

[0056] The planar arrangement of the sub-pixels may be any of a stripe arrangement, a square arrangement, a delta arrangement, and a Bayer arrangement. By arranging the main pixels in a matrix, a display device with a large number of pixels can be realized.

[0057] Color filters 109a to 109c are also arranged offset from the center of light-emitting region 108b, similar to microlens 106. In this case, color filter 109b may be located on a line connecting vertex B of microlens 106 and end B' of the light-emitting region on the first light-emitting element side.

[0058] Also, color filter 109b is located on the line connecting end C of the microlens and end C' of the light emitting region. At least two types of color filters may be located on the line connecting the apex of the microlens directly above light emitting region 108b and the light emitting region adjacent to light emitting region 108b. This is to reduce light emitted from the adjacent light emitting region from being unintentionally emitted from the microlens.

[0059] Light emitted from light emitting region 108b passes through color filter 109b and can be bent in an oblique direction by microlens 106, and does not pass through color filters 109a and 109c of other sub-pixels, thereby improving color purity.

[0060] Fig. 6 is a cross-sectional view showing the relationship between the light emitting region 108 and the microlens 106. In Fig. 6, the microlens 106 is formed with a height h, a radius r, and a refractive index n.

[0061] Light is emitted from light-emitting area 108 at an angle θ1, and is bent at an angle θ2 by point A of microlens 106. The inclination of point A with respect to the tangent of the microlens at this time is angle α. According to Snell's law, the following equation (1) holds. Note that in some parts of the figure, α+θ1 is written as β.

[0062] 1×sin(θ2+α)=n×sin(α+θ1)···(1) When equation (1) is solved for θ1, θ1 becomes equation (2).

[0063] θ1=sin -1 {sin(θ2+α) / n}-α (2) If the amount of deviation between the apex of microlens 106 and the center of light emitting region 108 is Xshift and the distance from light emitting region 108 to microlens 106 is L, the size of light emitting region X is expressed by the following equation (3).

[0064] X = rh × tan(θ1) (3) From equations (2) and (3), the size X of the light emitting region 108 is expressed by equation (4).

[0065] X = rh × tan [sin -1 {sin(θ2+α) / n}-α] (4) In this case, the relationship between the angle of light emitted from light emitting area 108, θ1, and the amount of deviation between the apex of microlens 106 and the center of light emitting area 108, Xshift, is expressed by equation (5).

[0066] tan -1 (Xshift / h+L)>θ1 (5) Calculations using wave optics simulations yielded the results in Table 1 for the amount of deviation between the apex of microlens 106 and the center of light emitting region 108, and the aperture ratio of the light emitting region. However, in reality, other members such as protective film 104 and color filter 109 exist between microlens 106 and light emitting region 108, which may cause errors.

[0067] [Table 1]

[0068] [Other configurations in the embodiment] (substrate) In this specification, the substrate 100 may be formed of a material capable of supporting the lower electrode 101, the functional layer 102, and the upper electrode 103, and is preferably made of, for example, glass, plastic, silicon, or the like. The plastic may be flexible. Examples of the flexible substrate include resin and organic materials, and specific examples thereof include polyimide resin, polyacrylic resin, PMMA, and the like. The substrate 100 may be provided with switching elements such as transistors, wiring, an interlayer insulating film (not shown), and the like.

[0069] (Lower electrode) The lower electrode 101 may be a metal material having a visible light reflectance of 50% or more from the viewpoint of light emission efficiency. Specifically, metals such as Al and Ag, and alloys of these metals with Si, Cu, Ni, Nd, Ti, etc. added thereto may be used. The reflective electrode may also have a barrier layer on the surface on the light emission side. As the material for the barrier layer, metals such as Ti, W, Mo, and Au, alloys thereof, or transparent conductive oxides such as ITO and IZO are preferable. The lower electrode may be an anode, in which case the upper electrode may be a cathode. On the other hand, when the lower electrode is a cathode, the upper electrode may be an anode.

[0070] In the above, the case where the lower electrode is a reflective electrode and the upper electrode is a light extraction electrode has been described, but the lower electrode may be a light extraction electrode. When the lower electrode is a light extraction electrode, the lower electrode has light transmissivity like the upper electrode described below. Whether an electrode is a lower electrode or an upper electrode is defined by the distance from the substrate. The electrode close to the substrate having a transistor that controls light emission is the lower electrode.

[0071] (insulating layer) The insulating layer 107 is provided so as to cover the edge of the lower electrode 101, and has an opening so that a part of the lower electrode 101 is exposed. The opening may be a light-emitting region 108. The insulating layer 107 is formed of an inorganic material such as silicon nitride (SiN), silicon oxynitride (SiON), or silicon oxide (SiO). The insulating layer is also called a pixel separation film or a bank.

[0072] The insulating layer 107 can be formed by using a known technique such as a sputtering method, a chemical vapor deposition method (CVD method), etc. The insulating layer 107 can also be formed by using an organic material such as an acrylic resin or a polyimide resin.

[0073] (Functional layer) The functional layer 102 has a light-emitting layer, and is disposed on the lower electrode 101. The functional layer can be formed by a known technique such as a vapor deposition method or a spin coating method.

[0074] The functional layer 102 may be composed of multiple layers, or may be a laminate of multiple layers. Examples of the multiple layers include a hole injection layer, a hole transport layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer. Other layers such as a charge generation layer and an electron blocking layer may be included between these layers.

[0075] The holes injected from the anode and the electrons injected from the cathode are recombined in the light-emitting layer to emit light. The functional layer may be an organic layer or an inorganic layer.

[0076] The light-emitting layer may be a single layer or a multi-layer. When the light-emitting layer has a multi-layer, any of the light-emitting layers may have a red light-emitting material, a green light-emitting material, and a red light-emitting material, and it is also possible to obtain white light by mixing the respective light-emitting colors. In addition, any of the organic layers may have light-emitting materials of complementary colors, such as a blue light-emitting material and a yellow light-emitting material.

[0077] The light-emitting material may be a material made of an organic compound, or may be a material having quantum dots. When an organic compound is used, the light-emitting layer may have a first material and a second material. The first material is a material that mainly emits light, and may also be called a dopant or a guest. On the other hand, the second material is a material that has a larger weight ratio in the light-emitting layer than the first material, and may be called a host. Examples of the first material include a material having a fluoranthene skeleton, a material having a pyrene skeleton, a material having a chrysene skeleton, and a material having an anthracene skeleton. A material having an anthracene skeleton is a material that has an anthracene structure in its structure, and may also be called an anthracene derivative.

[0078] The functional layer 102 may be shared by multiple pixels. In this case, the light-emitting device can be said to have multiple lower electrodes and one functional layer. However, this is not limited to this, and all or a part of the organic layer 102 may be patterned for each pixel.

[0079] (Top electrode) The upper electrode 103 is disposed on the functional layer 102 and has light-transmitting properties. The upper electrode 103 may be a semi-transparent material that transmits part of the light that reaches its surface and reflects the other part (i.e., semi-transparent and reflective). The material that constitutes the upper electrode 103 is composed of, for example, a transparent material such as a transparent conductive oxide, an elemental metal such as aluminum, silver, or gold, an alkali metal such as lithium or cesium, an alkaline earth metal such as magnesium, calcium, or barium, or an alloy material containing these metal materials.

[0080] The semi-transmissive material is preferably an alloy mainly composed of magnesium or silver. The upper electrode 103 may be a laminate of the above materials as long as it has a desired transmittance. The upper electrode 103 may be disposed across multiple pixels.

[0081] Although the upper electrode is a light extraction electrode in the above description, the upper electrode may be a reflective electrode. In this case, the upper electrode has reflectivity as described for the lower electrode above, and may be formed using a material exemplified as the material for the lower electrode.

[0082] The cathode may be a top-emission element using an oxide conductive layer such as ITO, or a bottom-emission element using a reflective electrode such as aluminum (Al), and is not particularly limited. The method for forming the cathode is not particularly limited, but it is more preferable to use a direct current or alternating current sputtering method, etc., since the film coverage is good and the resistance can be easily reduced.

[0083] (protective layer) The protective layer 104 is formed to cover the light emitting element and has light transmissivity. The protective layer preferably contains an inorganic material that has low permeability to oxygen and moisture from the outside. Specifically, silicon nitride (e.g., SiN), silicon oxynitride (e.g., SiON), silicon oxide (SiOx), aluminum oxide (e.g., Al2O3), titanium oxide (e.g., TiO2), and the like can be used. In terms of protective performance, inorganic materials such as SiN, SiON, and Al2O3 are preferable. The protective layer 104 may be formed by chemical vapor deposition (CVD), atomic layer deposition (ALD), or sputtering. As long as the protective layer 104 has sufficient moisture blocking performance, it may have a single layer structure or a laminated structure that combines the above materials and formation methods. For example, it may have a laminated structure of a layer formed by the ALD method and a layer formed by the sputtering method. Also, a layer formed by the CVD method, a layer formed by the ALD method, and a layer formed by the CVD method may be provided in this order. The protective layer may be disposed across a plurality of pixels.

[0084] (flattening layer) The planarization layer 105 is disposed on the protective layer 104. The planarization layer 105 may be formed of either an inorganic or organic material as long as it is made of a light-transmitting material. The planarization layer is a layer that reduces the unevenness formed by the protective layer. If the unevenness formed by the protective layer is small, or if the protective layer itself is polished to be flattened, the planarization layer does not have to be provided.

[0085] The planarization layer may have a lower refractive index than the protective layer. Specifically, the refractive index may be lower than that of the protective layer and greater than 1.5. Furthermore, the refractive index may be 1.5 or more and 1.8 or less, or 1.5 or more and 1.6 or less.

[0086] In addition, the planarization layer can be called a planarization layer if it is a layer disposed between the protective layer and another member. Specific examples of the planarization layer include polyvinylcarbazole resin, polycarbonate resin, polyester resin, ABS resin, acrylic resin, polyimide resin, phenol resin, epoxy resin, silicone resin, and urea resin.

[0087] (Optical components) The optical member 106 is formed on the planarization layer 105. The optical member may be a lens or the like, specifically a microlens. The microlens may be a lens with a small diameter. The microlens can be formed by an exposure and development process, and may be formed by a reflow method, an area gradation method, an etch-back method, or the like. Specifically, a film (photoresist film) made of a material for forming the microlens is formed, and the photoresist film is exposed and developed using a mask having a continuous gradation change. As such a mask, a gray mask or an area gradation mask that enables light irradiation with continuous gradations on the imaging surface by changing the density distribution of dots made of a light-shielding film that is equal to or lower than the resolution of the exposure device can be used.

[0088] Furthermore, the lens shape can be adjusted by performing an etch-back process on the microlenses formed by the exposure and development process.

[0089] Furthermore, it is possible to form a microlens by patterning the resin, reflowing it, melting it, and solidifying it, using surface tension. When an organic layer is used as the functional layer, the temperature of the reflow process is set to a predetermined temperature or lower. For example, the predetermined temperature or lower is 120°C or lower.

[0090] In this case, the microlens 106 may be not only a spherical microlens, but also an aspherical microlens, an asymmetric microlens, or a digital microlens.

[0091] (Color filter) The color filter may be provided on the protective layer. For example, a color filter that takes into consideration the size of the light-emitting element may be provided on another substrate and then bonded to the substrate on which the light-emitting element is provided, or the color filter may be patterned on the protective layer described above using photolithography technology. The color filter may be made of a polymer. The color filter may typically use a filter that transmits red, green, and blue light, respectively. That is, there are two or more color filters, and the first color filter and the second color filter are filters that transmit light of wavelengths different from each other. Furthermore, there may be a third color filter that transmits light of wavelengths different from both the first color filter and the second color filter.

[0092] When a color filter is provided, a planarization layer may be provided above and below the color filter, and may be made of the same or different materials. Specific examples of the material for the planarization layer include polyvinylcarbazole resin, polycarbonate resin, polyester resin, ABS resin, acrylic resin, polyimide resin, phenol resin, epoxy resin, silicone resin, and urea resin.

[0093] (opposing substrate) The above-mentioned member may have an opposing substrate. The opposing substrate is called an opposing substrate because it is provided at a position corresponding to the aforementioned substrate. The constituent material of the opposing substrate may be the same as that of the aforementioned substrate. When the aforementioned substrate is defined as a first substrate, the opposing substrate may be a second substrate.

[0094] The light emitting device in the above embodiment may be an organic light emitting device in which the functional layer is composed of an organic compound layer.

[0095] (Drive circuit) The light emitting device may have a driving circuit. The driving circuit may be an active matrix type that controls the emission of the first light emitting element and the second light emitting element independently. The active matrix type circuit may be a voltage programming circuit or a current programming circuit. The driving circuit has a pixel circuit for each pixel. The pixel circuit may have a light emitting element, a transistor that controls the emission brightness of the light emitting element, a transistor that controls the emission timing, a capacitance that holds the gate voltage of the transistor that controls the emission brightness, and a transistor for connecting to GND without going through the light emitting element.

[0096] The magnitude of the driving current may be determined according to the size of the light-emitting area. Specifically, when the first light-emitting element and the second light-emitting element are caused to emit light with the same luminance, the current value flowing through the first light-emitting element may be smaller than the current value flowing through the second light-emitting element. This is because the light-emitting area is small and therefore the required current may be small.

[0097] [Use of the light emitting device according to one embodiment of the present invention] The light-emitting device according to an embodiment of the present invention can be used as a component of a display device or a lighting device, and can also be used as an exposure light source for an electrophotographic image forming device, a backlight for a liquid crystal display device, a light-emitting device having a white light source and a color filter, etc.

[0098] The display device may be an image information processing device having an image input unit that inputs image information from an area CCD, a linear CCD, a memory card, etc., an information processing unit that processes the input information, and displays the input image on a display unit.

[0099] The display unit of the imaging device or inkjet printer may have a touch panel function. The driving method of the touch panel function may be an infrared type, a capacitance type, a resistive film type, or an electromagnetic induction type, and is not particularly limited. The display device may be used in the display unit of a multifunction printer.

[0100] Next, the display device according to the present embodiment will be described with reference to the drawings.

[0101] FIG. 7 is a schematic diagram showing an example of the display device according to the present embodiment. The display device 1000 may have a touch panel 1003, a display panel 1005, a frame 1006, a circuit board 1007, and a battery 1008 between an upper cover 1001 and a lower cover 1009. Flexible printed circuits FPC1002 and 1004 are connected to the touch panel 1003 and the display panel 1005. The circuit board 1007 is provided with a transistor. The battery 1008 may not be provided if the display device is not a portable device, and may be provided in a different position even if the display device is a portable device. The above transistors or the like may constitute a control unit that controls the display of the display device. The control unit may use a known method using a CPU or the like. That is, the display device according to the present embodiment has a light-emitting device and a control unit that controls the display of the light-emitting device.

[0102] The display device according to this embodiment may have color filters having red, green, and blue colors, and the red, green, and blue colors may be arranged in a delta arrangement or a stripe arrangement in the color filters.

[0103] The display device according to the present embodiment may be used in a display unit of a mobile terminal. In this case, it may have both a display function and an operation function. Examples of the mobile terminal include mobile phones such as smartphones, tablets, and head-mounted displays. When used in a display device, it may be used together with a magnifying optical system.

[0104] The display device according to the present embodiment may be used as a display unit of an imaging device having an optical unit with a plurality of lenses and an imaging element that receives light that has passed through the optical unit. The imaging device may have a display unit that displays information acquired by the imaging element. The display unit may be a display unit exposed to the outside of the imaging device, or may be a display unit disposed within a viewfinder. The imaging device may be a digital camera or a digital video camera.

[0105] 8(a) is a schematic diagram showing an example of an imaging device according to this embodiment. The imaging device 1100 may have a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The viewfinder 1101 may have a display device according to this embodiment. In this case, the display device may display not only an image to be captured, but also environmental information, imaging instructions, and the like. The environmental information may include the intensity of external light, the direction of external light, the moving speed of the subject, the possibility that the subject will be blocked by an obstruction, and the like.

[0106] Since the timing suitable for imaging is short, it is better to display information as soon as possible. Therefore, among the display devices using the light-emitting device according to one embodiment of the present invention, it is preferable to use an organic light-emitting device. This is because organic light-emitting elements have a fast response speed. Display devices using organic light-emitting elements can be used more preferably than liquid crystal display devices, which require a high display speed.

[0107] The imaging device 1100 has an optical section (not shown). The optical section has a plurality of lenses, which form an image on an imaging element housed in a housing 1104. The focus of the plurality of lenses can be adjusted by adjusting their relative positions. This operation can also be performed automatically. The imaging device may be called a photoelectric conversion device. The photoelectric conversion device can include an imaging method that does not capture images sequentially, but detects the difference from the previous image, cuts out an image from an image that is always recorded, and the like.

[0108] FIG. 8(b) is a schematic diagram showing an example of an electronic device according to this embodiment. The electronic device 1200 has a display unit 1201, an operation unit 1202, and a housing 1203. The housing 1203 may have a circuit, a printed circuit board having the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type reaction unit. The operation unit may be a biometric recognition unit that recognizes a fingerprint and performs unlocking or the like. An electronic device having a communication unit can also be called a communication device. The electronic device may further have a camera function by including a lens and an image sensor. An image captured by the camera function is displayed on the display unit. Examples of the electronic device include a smartphone and a notebook computer.

[0109] Fig. 9 is a schematic diagram showing an example of a display device according to this embodiment. Fig. 9(a) shows a display device such as a television monitor or a PC monitor. The display device 1300 has a frame 1301 and a display unit 1302. The light-emitting device according to this embodiment may be used for the display unit 1302.

[0110] It has a frame 1301 and a base 1303 that supports a display unit 1302. The base 1303 is not limited to the form shown in Fig. 9(a). The lower side of the frame 1301 may also serve as the base.

[0111] The frame 1301 and the display unit 1302 may be curved. The radius of curvature may be 5000 mm or more and 6000 mm or less.

[0112] FIG. 9(b) is a schematic diagram showing another example of the display device according to the present embodiment. The display device 1310 in FIG. 9(b) is configured to be bendable, and is a so-called foldable display device. The display device 1310 has a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The first display unit 1311 and the second display unit 1312 may have the light-emitting device according to the present embodiment. The first display unit 1311 and the second display unit 1312 may be one display unit without a joint. The first display unit 1311 and the second display unit 1312 can be separated at the bending point. The first display unit 1311 and the second display unit 1312 may display different images, or the first and second display units may display one image.

[0113] FIG. 10(a) is a schematic diagram showing an example of a lighting device according to the present embodiment. The lighting device 1400 may have a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusion unit 1405. The light source may have an organic light-emitting element according to the present embodiment. The optical filter may be a filter that improves the color rendering of the light source. The light diffusion unit can effectively diffuse the light of the light source, such as for lighting up, and deliver the light over a wide range. The optical filter and the light diffusion unit may be provided on the light emission side of the lighting. If necessary, a cover may be provided on the outermost part.

[0114] The lighting device is, for example, a device that illuminates a room. The lighting device may emit white light, neutral white light, or any other color from blue to red. It may have a dimming circuit that adjusts the light intensity. The lighting device may have the organic light-emitting element of the present invention and a power supply circuit connected thereto. The power supply circuit is a circuit that converts AC voltage into DC voltage. Moreover, white has a color temperature of 4200K, and neutral white has a color temperature of 5000K. The lighting device may have a color filter.

[0115] The lighting device according to the present embodiment may also include a heat dissipation section that dissipates heat from within the device to the outside, and examples of the heat dissipation section include metals with high specific heat, liquid silicon, and the like.

[0116] 10B is a schematic diagram of an automobile, which is an example of a moving body according to this embodiment. The automobile has tail lamps, which are an example of a lamp. The automobile 1500 has tail lamps 1501, and may be configured to turn on the tail lamps when braking or the like is performed.

[0117] A tail lamp 1501 may have an organic light-emitting element according to this embodiment. The tail lamp may have a protective member for protecting the organic EL element. The protective member may be made of any material as long as it has a certain degree of strength and is transparent, but is preferably made of polycarbonate or the like. Polycarbonate may be mixed with a furandicarboxylic acid derivative, an acrylonitrile derivative, or the like.

[0118] The automobile 1500 may have a body 1503 and a window 1502 attached thereto. The window may be a transparent display as long as it is not a window for checking the front and rear of the automobile. The transparent display may have an organic light-emitting element according to this embodiment. In this case, the constituent materials of the electrodes and the like of the organic light-emitting element are made of transparent members.

[0119] The moving body according to the present embodiment may be a ship, an aircraft, a drone, or the like. The moving body may have a body and a lamp provided on the body. The lamp may emit light to indicate the position of the body. The lamp has the organic light-emitting element according to the present embodiment.

[0120] An application example of the display device of each of the above-mentioned embodiments will be described with reference to Fig. 11. The display device can be applied to a system that can be worn as a wearable device such as smart glasses, HMD, and smart contacts. An image capturing and display device used in such an application example has an image capturing device capable of photoelectrically converting visible light, and a display device capable of emitting visible light.

[0121] 11(a) illustrates glasses 1600 (smart glasses) according to one application example. An imaging device 1602 such as a CMOS sensor or a SPAD is provided on the front side of a lens 1601 of the glasses 1600. In addition, a display device according to each of the above-mentioned embodiments is provided on the back side of the lens 1601.

[0122] The glasses 1600 further include a control device 1603. The control device 1603 functions as a power source that supplies power to the image capture device 1602 and the display device according to each embodiment. The control device 1603 also controls the operations of the image capture device 1602 and the display device. The lens 1601 is formed with an optical system for focusing light on the image capture device 1602.

[0123] FIG. 11(b) illustrates glasses 1610 (smart glasses) according to one application example. The glasses 1610 have a control device 1612, and the control device 1612 is equipped with an imaging device equivalent to the imaging device 1602 and a display device. The lens 1611 is formed with an optical system for projecting light emitted from the imaging device in the control device 1612 and the display device, and an image is projected onto the lens 1611. The control device 1612 functions as a power source for supplying power to the imaging device and the display device, and controls the operation of the imaging device and the display device. The control device may have a line-of-sight detection unit that detects the line of sight of the wearer. Infrared light may be used for detecting the line of sight. The infrared light emission unit emits infrared light toward the eyeball of a user gazing at a display image. An imaging unit having a light receiving element detects the reflected light of the emitted infrared light from the eyeball, thereby obtaining an image of the eyeball. By having a reduction means for reducing light from the infrared light emission unit to the display unit in a planar view, deterioration of image quality is reduced.

[0124] The gaze of the user with respect to the displayed image is detected from an image of the eyeball obtained by capturing infrared light. Any known method can be applied to gaze detection using the image of the eyeball. As an example, a gaze detection method based on a Purkinje image formed by reflection of irradiated light on the cornea can be used.

[0125] More specifically, the gaze detection process is performed based on the pupil-corneal reflex method. Using the pupil-corneal reflex method, a gaze vector that indicates the direction (rotation angle) of the eyeball is calculated based on the pupil image and the Purkinje image included in the captured image of the eyeball, thereby detecting the user's gaze.

[0126] A display device according to an embodiment of the present invention may have an imaging device having a light receiving element, and may control a display image on the display device based on information about a user's line of sight from the imaging device.

[0127] Specifically, the display device determines a first field of view area to which the user gazes and a second field of view area other than the first field of view area based on the line-of-sight information. The first field of view area and the second field of view area may be determined by a control device of the display device, or may be received from an external control device. In the display area of ​​the display device, the display resolution of the first field of view area may be controlled to be higher than the display resolution of the second field of view area. In other words, the resolution of the second field of view area may be lower than that of the first field of view area.

[0128] The display area may have a first display area and a second display area different from the first display area, and a high priority area may be determined from the first display area and the second display area based on line-of-sight information. The first field of view area and the second field of view area may be determined by a control device of the display device, or may be received from an external control device. The resolution of the high priority area may be controlled to be higher than the resolution of areas other than the high priority area. In other words, the resolution of an area with a relatively low priority may be lowered.

[0129] AI may be used to determine the first field of view area and the area with high priority. The AI ​​may be a model configured to estimate the angle of the line of sight and the distance to an object at the end of the line of sight from the image of the eyeball, using the image of the eyeball and the direction in which the eyeball in the image was actually looking as teacher data. The AI ​​program may be included in the display device, the imaging device, or an external device. If included in the external device, it is transmitted to the display device via communication.

[0130] When display control is performed based on visual recognition detection, the present invention is preferably applicable to smart glasses that further include an imaging device for capturing images of the outside world. The smart glasses can display captured outside information in real time.

[0131] As described above, by using a device using the organic light-emitting element according to this embodiment, it is possible to achieve a display with good image quality and stability even over a long period of time. [Explanation of symbols]

[0132] 10 Light emitting device 20 Optical system 30 Eyeball 100 Substrates 101 Lower electrode 102 Functional Layer 103 Upper electrode 104 Protective film 105 Planarization film 106 Micro Lens 107 Insulating layer 108 Light-emitting area 109 Color Filter 200 display area 300 Microlens shift amount 1000 display devices 1001 Top cover 1002 Flexible Printed Circuit 1003 Touch Panel 1004 Flexible Printed Circuit 1005 Display panel 1006 Frame 1007 Circuit Board 1008 Battery 1009 Lower cover 1100 Imaging device 1101 Viewfinder 1102 Rear display 1103 Operation section 1104 Case 1200 Electronic equipment 1201 Display section 1202 Operation unit 1203 Case 1300 display device 1301 Picture Frame 1302 Display section 1303 Foundation 1310 Display device 1311 First display section 1312 Second display section 1313 Case 1314 Bend Point 1400 Lighting Equipment 1401 Case 1402 Light source 1403 Circuit Board 1404 Optical film 1405 Light diffusion section 1500 Cars 1501 Tail lamp 1502 Window 1503 Body 1600 Smart Glasses 1601 Lens 1602 Imaging device 1603 Control device 1610 Smart Glasses 1611 Lens 1612 Control device 1701 Center of panel display area 1702 Panel display area edge 1703a Radiation angle in 1701 under global viewing conditions 1704a Radiation angle in 1702 under global viewing conditions 1703b Radiation angle in 1701 under fixation viewing condition 1704b Radiation angle in 1702 under fixation viewing condition

Claims

1. a substrate having a main surface, a first light-emitting element and a second light-emitting element disposed on the main surface, a first lens overlapping the first light-emitting element and the substrate in a planar view, and a second lens overlapping the second light-emitting element in a planar view; In a direction parallel to the main surface, a distance between a midpoint of a light emitting region of the second light emitting element and a vertex of the second lens is larger than a distance between a midpoint of a light emitting region of the first light emitting element and a vertex of the first lens; A light emitting device having a first light emitting region including the first light emitting element, and a second light emitting region including a plurality of the second light emitting elements and surrounding the first light emitting region with the plurality of the second light emitting elements, A light emitting device, characterized in that a light emitting area of ​​the second light emitting element is larger than a light emitting area of ​​the first light emitting element.

2. a substrate having a main surface, a first light-emitting element and a second light-emitting element disposed on the main surface, a first lens overlapping the first light-emitting element and the substrate in a planar view, and a second lens overlapping the second light-emitting element in a planar view; In a direction parallel to the main surface, a distance between a midpoint of a light emitting region of the second light emitting element and a vertex of the second lens is larger than a distance between a midpoint of a light emitting region of the first light emitting element and a vertex of the first lens; A light emitting device, wherein a shortest distance from the first light emitting element to an end of the substrate is greater than a shortest distance from the second light emitting element to an end of the substrate, A light emitting device, characterized in that a light emitting area of ​​the second light emitting element is larger than a light emitting area of ​​the first light emitting element.

3. a third light-emitting element and a third lens overlapping the third light-emitting element in a planar view, wherein a distance between a midpoint of a light-emitting region of the third light-emitting element and a vertex of the third lens is greater than a distance between a midpoint of a light-emitting region of a second light-emitting element and a vertex of the second lens in a direction parallel to the main surface; 3. The light emitting device according to claim 1, wherein a light emitting area of ​​the third light emitting element is larger than a light emitting area of ​​the second light emitting element.

4. a third light-emitting element and a third lens overlapping the third light-emitting element in a planar view, wherein a distance between a midpoint of a light-emitting region of the third light-emitting element and a vertex of the third lens is greater than a distance between a midpoint of a light-emitting region of a second light-emitting element and a vertex of the second lens in a direction parallel to the main surface; a shortest distance from the third light-emitting element to an edge of the substrate is shorter than a shortest distance from the second light-emitting element to an edge of the substrate; 3. The light emitting device according to claim 2, wherein a light emitting area of ​​the third light emitting element is larger than a light emitting area of ​​the second light emitting element.

5. the first light-emitting element has a lower electrode, a light-emitting layer, and an upper electrode in this order, and a first insulating layer and a second insulating layer respectively covering both ends of the lower electrode; 5. The light-emitting device according to claim 1, wherein the midpoint of the light-emitting region of the first light-emitting element is the midpoint of a line segment connecting an end of the first insulating layer and an end of the second insulating layer.

6. The light-emitting device according to any one of claims 1 to 5, characterized in that the first lens and the second lens are provided on the light extraction side of the light-emitting device relative to the first light-emitting element and the second light-emitting element.

7. The light-emitting device according to any one of claims 1 to 6, characterized in that the light-emitting regions of the first light-emitting element and the second light-emitting element are each polygonal, and at least one side of the polygon constituting the light-emitting region of the second light-emitting element is arranged inside the polygon constituting the light-emitting region of the first light-emitting element.

8. In the light emitting region of the second light emitting element, two sides of the polygon are arranged on the inner side of the light emitting region of the first light emitting element, 8. The light emitting device according to claim 7, wherein the two sides are the sides of the polygon that are farthest from each other.

9. In the light emitting region of the second light emitting element, a side that is disposed on the inner side of the polygon with respect to the light emitting region of the first light emitting element is one side of the polygon; 9. The light emitting device according to claim 8, wherein the one side is the side of the polygon that is closest to the light emitting region of the first light emitting element.

10. a second color filter on which light emitted from the second light emitting element is incident, a fourth light emitting element disposed adjacent to the second light emitting element, and a fourth color filter on which light emitted from the fourth light emitting element is incident and which transmits light having a wavelength different from that of the second color filter; The light-emitting device according to any one of claims 1 to 9, characterized in that the second color filter and the fourth color filter are arranged on a line segment connecting an end of the second lens on the first light-emitting element side and an end of the light-emitting area of ​​the fourth light-emitting element on the first light-emitting element side.

11. The height of the second lens is h, its radius is r, and its refractive index is n. The angle of light emitted from the light emitting region of the second light emitting element is θ1. The angle of the second lens at the point where the light emitted from the light emitting region of the second light emitting element is bent by the second lens is defined as α, θ2, and the angle of the bent light is defined as The amount of deviation between the apex of the second lens and the center of the light-emitting area of ​​the second light-emitting element is Xshift, If the distance from the light emitting region of the second light emitting element to the second lens is L, 11. The light emitting device according to claim 1, wherein a width of a light emitting region of the second light emitting element is represented by X and expressed by the following formula: ^=r-h×tan[sin －１ {sin (θ2 + α) / n} - α] tan - 1 (Xshift / h + L) > θ1

12. 12. The light emitting device according to claim 1, wherein the first light emitting element and the second light emitting element emit light of the same color.

13. the first light-emitting element and the second light-emitting element each have a first electrode, a second electrode, an organic compound layer disposed between the first electrode and the second electrode, a first insulating layer in contact with one end of the first electrode, and a second insulating layer in contact with the other end of the first electrode; 13. The light emitting device according to claim 1, wherein the distance between the first insulating layer and the second insulating layer in a cross section perpendicular to a main surface of the substrate is the light emitting region.

14. 14. The light emitting device according to claim 1, wherein the first light emitting element and the second light emitting element are of an active matrix type whose light emission is controlled independently of each other.

15. A display device comprising: the light-emitting device according to claim 1 ; and a control unit that controls display of the light-emitting device.

16. an optical unit having a plurality of lenses, an image sensor that receives light that has passed through the optical unit, and a display unit that displays an image captured by the image sensor; An imaging device, comprising: a display unit comprising the light-emitting device according to claim 1 .

17. 15. An electronic device comprising: a display unit having the light-emitting device according to claim 1; a housing in which the display unit is provided; and a communication unit provided in the housing for communicating with an outside.

18. 15. An illumination device comprising: a light source having the light emitting device according to claim 1; and a light diffusing portion or an optical film that transmits light emitted by the light source.

19. A moving object comprising: a lighting fixture having the light-emitting device according to claim 1; and a body on which the lighting fixture is provided.

Images