Display device

Abstract

The display device includes a light emitting element layer disposed on a substrate and a lens layer disposed on a side of the light emitting element layer opposite to the substrate. The lens layer includes a plurality of main lenses arranged in an array in a plane direction of the lens layer and an auxiliary lens disposed on a side of the array of the plurality of main lenses opposite to the light emitting element layer, and the auxiliary lens is located between adjacent main lenses among the plurality of main lenses when the lens layer is viewed in a plan view.

Description

Technical Field

[0001] The present disclosure relates to a display device. Background Art

[0002] There is known a display device in which a lens for light collection is provided for each pixel in order to efficiently extract light from a light emitting element (for example, Patent Document 1).

[0003] Reference List

[0004] Patent Literature

[0005] Patent document 1: WO 2020 / 080022 A Summary of the invention

[0006] Technical issues

[0007] For example, at the edge of the pixel, the lens cannot collect light sufficiently, so that light that cannot be extracted in the front direction of the pixel is generated in some cases. As a result, the light extraction efficiency is reduced.

[0008] One aspect of the present disclosure improves light extraction efficiency.

[0009] Solution to the problem

[0010] A display device according to one aspect of the present disclosure includes: a light emitting element layer, which is arranged on a substrate; and a lens layer, which is arranged on a side opposite to the substrate across the light emitting element layer, wherein the lens layer includes: a plurality of main lenses, which are arranged in an array in a plane direction of the lens layer; and auxiliary lenses, which are arranged on a side opposite to the light emitting element layer across the array of the plurality of main lenses, and in a plan view of the lens layer, the auxiliary lenses are located between adjacent main lenses among the plurality of main lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a view showing an example of a schematic configuration of a display device according to an embodiment.

[0012] Figure 2 is a view showing an embodiment of a traveling direction of light.

[0013] Figure 3 is a view showing a comparative example.

[0014] Figure 4 is a view showing an example of light extraction efficiency.

[0015] Figure 5 is a view showing an embodiment of a method of manufacturing a display device.

[0016] Figure 6 is a view showing an embodiment of a method of manufacturing a display device.

[0017] Figure 7 is a view showing an embodiment of a method of manufacturing a display device.

[0018] Figure 8 is a view showing an embodiment of a method of manufacturing a display device.

[0019] Fig. 9 is a view showing a variation of the cross-sectional structure.

[0020] Fig.10 is a view showing a variation of the cross-sectional structure.

[0021] Fig.11 is a view showing a variation of the cross-sectional structure.

[0022] Fig.12 is a view showing a variation of the cross-sectional structure.

[0023] Fig.13 is a view showing a variation of the cross-sectional structure.

[0024] Fig.14 is a view showing a variation of the cross-sectional structure.

[0025] Fig.15 is a view showing a variation of the cross-sectional structure.

[0026] Fig.16 is a view showing a variation of the cross-sectional structure.

[0027] Fig.17 is a view showing a variation of the cross-sectional structure.

[0028] Fig.18 is a view showing a variation of the plan layout.

[0029] Fig.19 is a view showing a variation of the plan layout.

[0030] Fig. 20 is a view showing a variation of the plan layout.

[0031] Fig.21 is a view showing a variation of the plan layout.

[0032] Fig. 22 is a view showing a variation of the plan layout.

[0033] Fig.23 is a view showing a variation of the plan layout.

[0034] Fig.24 is a view showing a variation of the plan layout.

[0035] Fig.25is a view showing a variation of the plan layout.

[0036] Fig.26 is a view showing a variation of the plan layout.

[0037] Fig. 27 2 are views showing modified examples.

[0038] Fig.28 2 are views showing modified examples.

[0039] Fig.29 2 are views showing modified examples.

[0040] Fig.30 2 are views showing modified examples.

[0041] Fig.31 2 are views showing modified examples.

[0042] Fig.32 2 are views showing modified examples.

[0043] Fig.33 2 are views showing modified examples.

[0044] Fig.34 2 are views showing modified examples.

[0045] Fig.35 2 are views showing modified examples.

[0046] Fig.36 2 are views showing modified examples.

[0047] Fig.37 2 are views showing modified examples.

[0048] Fig.38 2 are views showing modified examples.

[0049] Fig.39 2 are views showing modified examples.

[0050] Fig.40 2 are views showing modified examples.

[0051] Fig.41 are views showing application examples.

[0052] Fig.42 are views showing application examples.

[0053] Fig.43 are views showing application examples.

[0054] Fig.44 are views showing application examples.

[0055] Fig.45are views showing application examples.

[0056] Fig.46 are views showing application examples.

[0057] Fig.47 are views showing application examples.

[0058] Fig.48 are views showing application examples.

[0059] Fig.49 is a view showing an example of a schematic configuration of a display device according to another embodiment.

[0060] Fig.50 is a view showing an embodiment of a traveling direction of light.

[0061] Fig.51 is a view showing an embodiment of a traveling direction of light.

[0062] Fig.52 is a view showing an embodiment of a traveling direction of light.

[0063] Fig.53 is a view showing an embodiment of a traveling direction of light.

[0064] Fig.54 is a view showing an embodiment of a method of manufacturing a display device.

[0065] Fig.55 is a view showing an embodiment of a method of manufacturing a display device.

[0066] Fig.56 is a view showing an embodiment of a method of manufacturing a display device.

[0067] Fig.57 is a view showing an embodiment of a method of manufacturing a display device.

[0068] Fig.58 is a view showing an embodiment of a method of manufacturing a display device.

[0069] Fig.59 is a view showing an embodiment of a method of manufacturing a display device.

[0070] Fig.60 is a view showing an embodiment of a method of manufacturing a display device.

[0071] Fig.61 is a view showing an embodiment of a method of manufacturing a display device.

[0072] Fig.62 is a view showing a variation of the cross-sectional structure.

[0073] Fig.63 is a view showing a variation of the cross-sectional structure.

[0074] Fig.64 is a view showing a variation of the cross-sectional structure.

[0075] Fig.65 is a view showing a variation of the cross-sectional structure.

[0076] Fig.66 is a view showing a variation of the plan layout.

[0077] Fig.67 is a view showing a variation of the plan layout.

[0078] Fig.68 is a view showing a variation of the plan layout.

[0079] Fig.69 is a view showing a variation of the plan layout.

[0080] Fig.70 is a view showing a variation of the plan layout.

[0081] Fig.71 is a view showing a variation of the plan layout.

[0082] Fig.72 is a view showing a variation of the plan layout. DETAILED DESCRIPTION

[0083] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in each of the following embodiments, the same reference numerals are given to the same structural elements, and repeated descriptions are omitted.

[0084] The present disclosure will be described in the following order.

[0085] 0. Introduction

[0086] 1. Implementation Method

[0087] 2. Variation of cross-sectional structure

[0088] 3. Variation of the floor plan

[0089] 4. Example of Effect

[0090] 5. Other Modifications

[0091] 6. Application Examples

[0092] 7. Further Implementation Methods

[0093] 8. Variation of cross-sectional structure

[0094] 9. Variation of floor plan

[0095] 0. Introduction

[0096] There is a display device that includes a lens (e.g., an on-chip microlens) for light collection for each pixel in order to improve light extraction efficiency in the front direction. The area of ​​the lens is ideally set to a size that allows the entire light from the light-emitting element to be incident thereon, but is limited because the adjacent pixel is also provided with a lens.

[0097] In particular, in a portion spaced apart from the center of the pixel, for example, in an edge portion of the pixel, the lens cannot sufficiently collect light, so that light cannot be extracted in the front direction of the pixel in some cases. This light may also be referred to as leakage light that does not contribute to the front brightness. As leakage light is generated, light extraction efficiency decreases, and ultimately luminous efficiency decreases.

[0098] Note that the light extraction efficiency can be understood as representing the ratio of light effectively extracted to the outside to the light (amount) from the light-emitting element in the pixel. The luminous efficiency can be understood as representing the conversion efficiency of how effectively light is output to the outside relative to the current (amount) supplied to the light-emitting element. The luminous efficiency can be proportional to the light extraction efficiency.

[0099] According to the disclosed technology, light extraction efficiency can be improved, and ultimately light emitting efficiency can be improved.

[0100] 1. Implementation Method

[0101] Figure 1 1 is a view showing an example of a schematic configuration of a display device according to an embodiment. A partial cross section of a display device 1 is schematically shown. The display device 1 emits light in a front direction (forward). The front direction of the display device 1 is shown as a positive Z-axis direction.

[0102] The display device 1 includes a plurality of pixels 9 (corresponding to reference numeral 9R in the figure). The plurality of pixels 9 are arranged in an array (e.g., a two-dimensional matrix) in a plane direction orthogonal to the Z-axis direction. Examples of pixel arrangements include delta arrangement, square arrangement, etc., but are not limited thereto. Figure 1 A pixel 9R emitting red light, a pixel 9G emitting green light, and a pixel 9B emitting blue light are shown as the plurality of pixels 9. In addition, the pixels 9R, 9G, and 9B are sometimes referred to as sub-pixels. Unless otherwise specified, it is assumed that the plurality of pixels 9 includes the pixels 9R, 9G, and 9B.

[0103] The display device 1 includes a substrate 2, a light emitting element layer 3, a color filter layer 4, and a lens layer 5. The substrate 2, the light emitting element layer 3, the color filter layer 4, and the lens layer 5 are arranged in this order along the positive Z-axis direction.

[0104] The substrate 2 is formed on a semiconductor substrate such as a silicon substrate and supports the light emitting element layer 3. The material of the substrate 2 may be an insulating material such as SiO2, SiN, or SiON.

[0105] Contact plugs 21 (corresponding to reference numerals 21R, etc. in the figure) are formed in the substrate 2. Contact plugs 21 are provided for the pixels 9, respectively. The contact plugs 21 of the pixel 9R are referred to as contact plugs 21R in the figure. The contact plugs 21 of the pixel 9G are referred to as contact plugs 21G in the figure. The contact plugs 21 of the pixel 9B are referred to as contact plugs 21B in the accompanying drawings. The contact plugs 21 are formed to penetrate the substrate 2 in the Z-axis direction.

[0106] Although not shown in the figure, circuit elements (transistors, wirings, etc.) for driving the light emitting element layer 3 are provided across the substrate 2 on the side opposite to the light emitting element layer 3. The circuit elements are electrically connected to the light emitting element layer 3 via contact plugs 21.

[0107] The light emitting element layer 3 is provided on the substrate 2. Examples of the light emitting element included in the light emitting element layer 3 are organic electroluminescent (EL) elements, light emitting diode (LED) elements, etc. Hereinafter, it is assumed that the light emitting element is an organic EL element.

[0108] The light emitting element layer 3 includes an electrode layer 31, an electrode layer 32, an organic layer 33, a protective layer 34, and a planarizing layer 35. The electrode layer 31, the organic layer 33, the electrode layer 32, the protective layer 34, and the planarizing layer 35 are arranged in this order in the positive Z-axis direction.

[0109] The electrode layer 31 and the electrode layer 32 are the first electrode layer and the second electrode layer arranged on the opposite sides of the organic layer 33. The electrode layer 31 includes electrodes 311 (corresponding to the reference symbol 311R in the figure, etc.) respectively used for the pixels 9. The electrode 311 of the pixel 9R is referred to as the electrode 311R in the figure. The electrode 311 of the pixel 9G is referred to as the electrode 311G in the figure. The electrode 311 of the pixel 9B is referred to as the electrode 311B in the accompanying drawings. The electrodes of the electrode layer 32 are arranged in common on a plurality of pixels 9, in this example, on the pixels 9R, the pixels 9G and the pixels 9B.

[0110] Note that Figure 1 In the illustrated embodiment, an electrode edge film 312 having insulation is provided between the edge portion of each of the electrodes 311 of the electrode layer 31 and the organic layer 33. A portion of the electrode 311 covered with the electrode edge film 312 is electrically isolated from the organic layer 33, and light emission of the organic layer 33 corresponding to the portion is suppressed.

[0111] The organic layer 33 includes an organic EL element. In this embodiment, the organic layer 33 is configured to emit at least red light at the pixel 9R, at least green light at the pixel 9G, and at least blue light at the pixel 9B. For example, the organic layer 33 may be configured to emit light (e.g., white light) including red light, green light, and blue light on all pixels 9R, 9G, and 9B. The organic layer 33 may have a laminated structure in which a plurality of layers emitting light beams of corresponding colors are laminated.

[0112] The protective layer 34 is provided to cover the electrode layer 32. Examples of the material of the protective layer 34 are SiN, SiON, Al2O3, TiO2, and the like.

[0113] The planarization layer 35 is provided between the protective layer 34 and the color filter layer 4. The refractive index of the planarization layer 35 may be higher than that of the protective layer 34. As the material of the protective layer 34, for example, a material obtained by adding TiO2 to a base material formed of an acrylic resin, a material obtained by adding TiO2 to a base material formed of the same material as the color filter layer 4 described later (excluding a pigment), or the like may be used.

[0114] The color filter layer 4 is provided between the light emitting element layer 3 and the lens layer 5. The color filter layer 4 includes a color filter 41 for the pixel 9 (corresponding to the reference symbol 41R in the figure, etc.). The color filter 41 of the pixel 9R is referred to as the color filter 41R in the figure. The color filter 41R allows red light from the light from the light emitting element layer 3 to pass. The color filter 41 of the pixel 9G is referred to as the color filter 41G in the figure. The color filter 41G allows green light from the light from the light emitting element layer 3 to pass. In the figure, the color filter 41 of the pixel 9B is referred to as the color filter 41B. The color filter 41B allows blue light from the light from the light emitting element layer 3 to pass.

[0115] As the material of the color filter layer 4, various known materials such as color resist materials can be used. The color filter layer 4 is formed of, for example, a resin to which a desired pigment or dye is added. By selecting the pigment or dye, adjustment is made so that the transmittance in the target wavelength range of red light, green light, blue light, etc. is high, and the transmittance in other wavelength ranges is low.

[0116] The lens layer 5 is disposed on the opposite side of the substrate 2 via the light emitting element layer 3 (and the color filter layer 4). The lens layer 5 includes a base 50, a plurality of main lenses 51 (corresponding to reference symbols 51R, etc. in the figure), and one or more auxiliary lenses 52 (corresponding to reference symbols 52RG, etc. in the figure).

[0117] The base 50 includes a portion (a portion filling the gap) between the main lens 51 and the auxiliary lens 52. It can be said that the arrangement of the main lens 51 and the auxiliary lens 52 in the base 50, that is, the relative positions of the main lens 51 and the auxiliary lens 52 are defined by the base 50.

[0118] A main lens 51 is provided for each pixel 9, and thus a plurality of main lenses 51 are arranged in an array in the plane direction of the lens layer 5. The main lens 51 of the pixel 9R is referred to as the main lens 51R in the drawings. The main lens 51 of the pixel 9G is referred to as the main lens 51G in the drawings. The main lens 51 of the pixel 9B is referred to as the main lens 51B in the drawings.

[0119] The main lens 51 makes the traveling direction of the light from the light emitting element layer 3 close to the front direction of the display device 1 (positive direction of the Z axis), that is, the front direction of the corresponding pixel 9. In this embodiment, the main lens 51R makes the traveling direction of the red light from the color filter 4R close to the front direction of the pixel 9R. The main lens 51G makes the traveling direction of the green light from the color filter 4G close to the front direction. The main lens 51B makes the traveling direction of the blue light from the color filter 4B close to the front direction.

[0120] exist Figure 1 In the illustrated embodiment, the main lens 51 is a condenser lens having a convex shape (e.g., semicircular) protruding toward the side opposite to the light emitting element layer 3 (i.e., in the positive direction (Z-axis positive direction)). The refractive index of the main lens 51 may be greater than the refractive index of the base 50. Various known materials including resins and the like may be used.

[0121] The auxiliary lens 52 is arranged on the side opposite to the light emitting element layer 3 across the array of the plurality of main lenses 51. When the lens layer 5 is observed in a plan view (observed in the Z-axis direction), the auxiliary lens 52 is located between adjacent main lenses 51 among the plurality of main lenses 51. In this embodiment, one auxiliary lens 52 is located between adjacent main lenses 51. The auxiliary lens 52 between the main lens 51R and the main lens 51G is referred to as an auxiliary lens 52RG in the drawings. The auxiliary lens 52 between the main lens 51G and the main lens 51B is referred to as an auxiliary lens 52GB in the drawings.

[0122] The auxiliary lens 52 makes the traveling direction of the light from the corresponding main lens 51 close to the front direction of the display device 1 (Z-axis positive direction), that is, the front direction of the corresponding pixel 9. In addition, in this embodiment, the auxiliary lens 52RG makes the traveling direction of the red light from the main lens 51R close to the front direction of the pixel 9R, and makes the traveling direction of the green light from the main lens 51G close to the front direction of the pixel 9G. In addition, the auxiliary lens 52GB makes the traveling direction of the green light from the main lens 51G close to the front direction of the pixel 9G, and makes the traveling direction of the blue light from the main lens 51B close to the front direction of the pixel 9B.

[0123] exist Figure 1 In the illustrated embodiment, the auxiliary lens 52 is a condenser lens having a convex shape (e.g., a semicircular shape) protruding toward the array of the plurality of main lenses 51, that is, in the direction opposite to the front direction (negative direction of the Z axis). The auxiliary lens 52 may have a refractive index higher than that of the base 50. Various known materials may be used. The refractive index of the auxiliary lens 52 may be the same as or different from that of the main lens 51. The material of the auxiliary lens 52 may be the same as or different from that of the main lens 51.

[0124] In a plan view of the lens layer 5, a portion of the auxiliary lens 52 may overlap a portion of at least one of the corresponding adjacent main lenses 51. Thus, more light can be incident on the auxiliary lens 52 compared to a case where the auxiliary lens 52 and the main lens 51 do not overlap. Figure 1 In the embodiment shown in , a portion of the auxiliary lens 52RG overlaps with a portion of the main lens 51R, and another portion of the auxiliary lens 52RG overlaps with a portion of the main lens 51G. A portion of the auxiliary lens 52GB overlaps with another portion of the main lens 51G, and another portion of the auxiliary lens 52GB overlaps with a portion of the main lens 51B.

[0125] In a plan view of the lens layer 5, the auxiliary lens 52 may be located at an edge portion of the pixel 9. Figure 1 In the illustrated embodiment, the auxiliary lens 52RG is located at the edge portion of the pixel 9R and the edge portion of the pixel 9G. The auxiliary lens 52GB is located at the edge portion of the pixel 9G and the edge portion of the pixel 9B.

[0126] It should be noted that in Figure 1 In the embodiment shown in , the portion formed of the same material as the auxiliary lens 52 extends along the surface (surface on the positive Z axis direction side) of the lens layer 5. This portion covers the base 50, and the base 50 is not exposed on the surface of the lens layer 5.

[0127] The light extraction efficiency is improved by the auxiliary lens 52. Figures 2 to 4 Give a description.

[0128] Figure 2is a view of an embodiment showing the direction of travel of light. As schematically shown by the arrow, in pixel 9G, the green light in the light from the light-emitting element layer 3 passes through the color filter 4G, and its direction of travel passes through the main lens 51G close to the front direction. At the edge of pixel 9G, a portion of the green light that has passed through the main lens 51G passes through the auxiliary lens 52RG, and its direction of travel is further close to the front direction. In addition, another portion of the green light that has passed through the main lens 51G passes through the auxiliary lens 52GB, and its direction of travel is further close to the front direction. Not only the light of the central portion of pixel 9G but also the light of the end portion of pixel 9G is extracted toward the front direction of pixel 9G, so the light extraction efficiency is improved. Although not shown in the figure, the same is true for pixel 9R and pixel 9B.

[0129] Figure 3 1E and 1E according to the comparative example are compared with the display device 1 ( Figure 2 ) is that the auxiliary lens 52 is not included. Since the auxiliary lens 52 is not provided, as schematically shown by the arrow, the light at the end of the pixel 9G is not extracted in the front direction of the pixel 9G (the positive direction of the Z axis), and the light extraction efficiency is reduced. Although not shown in the figure, the same is true for the pixel 9R and the pixel 9B.

[0130] Figure 4 is a view showing an example of light extraction efficiency. The horizontal axis of the graph indicates the viewing angle (degrees). The vertical axis of the graph indicates relative brightness. The viewing angle is an angle relative to the Z-axis direction, and 0 degrees corresponds to the front direction (Z-axis positive direction). According to this embodiment ( Figure 2 ) is greater than the brightness of the display device 1 in the front direction according to the comparative example ( Figure 3 ) in the front direction of the display device 1E. It can be seen that the display device 1 including the auxiliary lens 52 can improve the light extraction efficiency.

[0131] As described above, since the lens layer 5 includes not only the main lens 51 but also the auxiliary lens 52 in the display device 1 according to the embodiment, the light in the portion between the main lenses 51 is also easily extracted in the front direction of the pixel 9. That is, not only the light at the center portion of the pixel 9 but also the light at the edge portion of the pixel 9 can be easily extracted in the front direction of the pixel 9. Therefore, as described at the beginning, the light extraction efficiency can be improved and the light emission efficiency can be improved. The effect of reducing power consumption by improving the efficiency can also be obtained.

[0132] In addition, in the display device 1 according to the embodiment, the amount of light emitted in the light-emitting element layer 3 can also be increased by increasing the area (opening area) of the portion of the electrode 311 that is not covered by the electrode edge film 312. When the opening area increases, the light at the edge of the pixel 9 increases, but the light at this portion can also be extracted in the front direction. For example, since the amount of light emitted increases, the maximum brightness of the display device 1 can be improved.

[0133] On the other hand, in the display device 1E according to the comparative example, light from the edge portion of the pixel 9 cannot be extracted in the front direction, and even if the opening area is increased, the loss due to light leakage increases. In order to increase the amount of light emitted without increasing the opening area, it is necessary to increase the amount of current flowing through each area of ​​the light-emitting element layer 3. However, from the perspective of the service life of the light-emitting element, etc., the amount of current is limited. Such a problem can also be solved by the display device 1 according to this embodiment.

[0134] Figures 5 to 8 1 is a view showing an example of a method for manufacturing a display device. Specifically, the formation of the auxiliary lens 52 will be described. First, as Figure 5 As shown in FIG. 1 , a light emitting element layer 3, a color filter layer 4, and a lens layer 5 in which a main lens 51 is embedded are sequentially formed on a substrate 2 using a known method. Figures 6 to 8 As shown, an auxiliary lens 52 embedded in the lens layer 5 is formed.

[0135] Specifically, Figure 6 As shown, the photoresist material PM is arranged on the lens layer 5. The photoresist material PM is coated on a portion of the lens layer 5 to obtain a pattern of the auxiliary lens 52. Figure 7 As shown, the lens layer 5 is processed by dry etching or the like. After removing the photoresist material PM, as shown in FIG. Figure 8 As shown, the material of the auxiliary lens 52 is provided on the lens layer 5. For example, the material of the auxiliary lens 52 is applied. In the case where the material is a resin, sealing with the resin can be performed. For example, the display device 1 including the auxiliary lens 52 can be manufactured in this way.

[0136] Some embodiments will be described of variations of the configuration of the display device 1. In the configurations described below, non-exclusive configurations may be arbitrarily combined.

[0137] 2. Variation of cross-sectional structure

[0138] Figures 9 to 17 2 is a view showing a variation of the cross-sectional structure. Hereinafter, description will be made in order.

[0139] exist Fig. 9In the illustrated embodiment, the base 50 is exposed at a portion other than the auxiliary lens 52 on the surface of the lens layer 5 (the surface on the positive direction side of the Z axis). For example, the base 50 covering the above is removed by etching or the like. Figure 1 This configuration is achieved by removing the portion of the base 50 in FIG.

[0140] exist Fig.10 In the embodiment shown in , the auxiliary lens 52 has a convex shape (for example, a semicircular shape) protruding in the direction opposite to the direction toward the array of the plurality of main lenses 51 (Z-axis positive direction).

[0141] exist Fig.11 In the embodiment shown in , when the lens layer 5 is observed in a plan view (observed in the Z-axis direction), two auxiliary lenses 52 are located between adjacent main lenses 51. In this embodiment, the pixel 9R and the pixel 9B are adjacent to each other, and the two auxiliary lenses 52RB are arranged side by side between the main lens 51 of the pixel 9R and the main lens 51B of the pixel 9B. Although not shown, three or more auxiliary lenses 52 may be arranged. Any number of auxiliary lenses 52 according to design, etc. may be set between adjacent main lenses 51.

[0142] exist Fig.12 In the embodiment shown in , the convex shape of the auxiliary lens 52 includes a trapezoidal shape and a triangular shape. In this embodiment, the auxiliary lens 52RG has a trapezoidal shape, and the auxiliary lens 52GB has a triangular shape.

[0143] exist Fig.13 In the embodiment shown in , the auxiliary lens 52 has a flat portion at its bottom (portion on the negative Z-direction side). In this embodiment, the bottom surface of the auxiliary lens 52RB has a flat surface.

[0144] exist Fig.14 In the illustrated embodiment, the display device 1 does not include the color filter layer 4. In this embodiment, the lens layer 5 is provided on the light emitting element layer 3. The light emitting element layer 3 is configured to emit red light in the pixel 9R, green light in the pixel 9G, and blue light in the pixel 9B.

[0145] exist Fig.15 In the embodiment shown in , the lens layer 5 further includes a plurality of main lenses 51-2 (corresponding to reference symbol 51-2R etc. in the figure). The plurality of main lenses 51-2 are arranged on a side opposite to the auxiliary lenses 52 across the array of the plurality of main lenses 51, and are a plurality of second main lenses corresponding to the plurality of main lenses 51. The material of the main lenses 51-2 may be the same as that of the main lenses 51.

[0146] The main lens 51 - 2 of the pixel 9R is referred to as the main lens 51 - 2R in the drawings. The main lens 51 - 2 of the pixel 9G is referred to as the main lens 51 - 2G in the drawings. The main lens 51 - 2 of the pixel 9B is referred to as the main lens 51 - 2B in the drawings.

[0147] In this embodiment, the main lens 51-2R makes the traveling direction of red light from the main lens 51R, the auxiliary lens 52RG, etc. close to the front direction of the pixel 9R (positive direction of the Z axis). The main lens 51-2G makes the traveling direction of green light from the main lens 51G, the auxiliary lens 52RG, and the auxiliary lens 52GB close to the front direction of the pixel 9G. The main lens 51-2B makes the traveling direction of blue light from the main lens 51B, the auxiliary lens 52GB, etc. close to the front direction of the pixel 9B. As a result, the light extraction efficiency can be further improved.

[0148] exist Fig.16 In the illustrated embodiment, the lens layer 5 further includes one or more auxiliary lenses 52-2 (corresponding to reference symbols 52-2RG, etc. in the figure). The auxiliary lenses 52-2 are arranged on a side opposite to the auxiliary lenses 52 across the array of the main lenses 51-2, and are second auxiliary lenses corresponding to the auxiliary lenses 52. The material of the auxiliary lenses 52-2 may be the same as that of the auxiliary lenses 52.

[0149] When the lens layer 5 is observed in a plan view (observed in the Z-axis direction), the auxiliary lens 52-2 is located between adjacent main lenses 51-2 among the plurality of main lenses 51-2. The auxiliary lens 52-2 located between the main lens 51-2R and the main lens 51-2G is referred to as the auxiliary lens 52-2RG in the drawings. The auxiliary lens 52-2 located between the main lens 51-2G and the main lens 51-2B is referred to as the auxiliary lens 52-2GB in the drawings.

[0150] Furthermore, in this embodiment, the auxiliary lens 52-2RG makes the traveling direction of the red light from the main lens 51-2R close to the front direction of the pixel 9R, and makes the traveling direction of the green light from the main lens 51-2G close to the front direction of the pixel 9G. Furthermore, the auxiliary lens 52-2GB makes the traveling direction of the green light from the main lens 51-2G close to the front direction of the pixel 9G, and makes the blue light from the main lens 51-2B close to the front direction of the pixel 9B. Thus, the light extraction efficiency can be further improved.

[0151] exist Fig.17 In the embodiment shown in , the convex shape of the main lens 51 includes a triangular shape and a trapezoidal shape. In this embodiment, the main lens 51R has a triangular shape, and the main lens 51G has a trapezoidal shape.

[0152] 3. Variation of the floor plan

[0153] Figures 18 to 26 Schematically shows a planar layout of a portion of the lens layer 5 when viewed from the negative direction of the Z axis. Hereinafter, description will be made in order.

[0154] exist Figures 18 to 21 In the embodiment shown in , the pixel arrangement is an incremental arrangement, and the plurality of main lenses 51 also form an incremental arrangement. The auxiliary lens 52 may have an annular shape surrounding the main lens 51. The annular shape of the auxiliary lens 52 may be as follows: Fig.18 and Fig.19 The circular shape shown or Fig. 20 and Fig.21 The auxiliary lens 52 corresponding to the adjacent main lens 51 can be as shown in FIG. Fig.18 and Fig. 20 , or may be spaced apart from each other as shown in Fig.19 and Fig.21 Connections shown in .

[0155] exist Figure 22 to Figure 25 In the embodiment shown in FIG. 1 , the pixel arrangement is a square arrangement, and the plurality of main lenses 51 also form a square arrangement. Similar to the above, the auxiliary lens 52 may have an annular shape surrounding the main lens 51. The annular shape of the auxiliary lens 52 may be as follows: Fig. 22 and Fig.23 The circular shape shown or Fig.24 and Fig.25 The auxiliary lens 52 corresponding to the adjacent main lens 51 can be as shown in FIG. Fig. 22 and Fig.24 , or may be spaced apart from each other as shown in Fig.23 and Fig.25 Connections shown in .

[0156] The present invention is not limited to the above embodiment, and various planar layouts according to layout restrictions, etc. may be adopted. For example, the auxiliary lens 52 does not need to surround the entire periphery of the main lens 51. The auxiliary lens 52 may have various planar shapes corresponding to the planar shape of the main lens 51. Fig.26 In the embodiment shown in FIG. 1 , the main lens 51 has an elliptical shape. The auxiliary lens 52 is disposed between adjacent main lenses 51 along the short axis direction of the ellipse, but is not disposed between adjacent main lenses 51 along the long axis direction of the ellipse.

[0157] In addition, as described above, a portion of the auxiliary lens 52 may overlap a portion of at least one of the corresponding adjacent main lenses 51 .

[0158] 4. Example of Effect

[0159] For example, the above technology is defined as follows. One of the disclosed technologies is a display device 1. As shown in reference Figure 1 and Figures 9 to 26 As described in, for example, the display device 1 includes a light emitting element layer 3 disposed on a substrate 2 and a lens layer 5 disposed on a side opposite to the substrate 2 across the light emitting element layer 3. The lens layer 5 includes a plurality of main lenses 51 arranged in an array in a plane direction of the lens layer 5 (a plane direction orthogonal to the Z-axis direction), and an auxiliary lens 52 disposed on a side opposite to the light emitting element layer 3 across the array of the plurality of main lenses 51. When the lens layer 5 is observed in a plan view (observed in the Z-axis direction), the auxiliary lens 52 is located between adjacent main lenses 51 among the plurality of main lenses 51.

[0160] According to the above display device 1, since the lens layer 5 includes not only the main lenses 51 but also the auxiliary lenses 52, light in the portion between the main lenses 51 is also easily extracted in the front direction of the pixels 9. Therefore, light extraction efficiency can be improved.

[0161] As reference Figure 1 and Figure 2 As described in , etc., the main lens 51 can make the propagation direction of light from the light emitting element layer 3 close to the front direction (positive direction of the Z axis) of the display device 1, and the auxiliary lens 52 can make the propagation direction of light from the main lens 51 close to the front direction. The auxiliary lens 52 can have a refractive index higher than the refractive index of the portion (base 50) between the auxiliary lens 52 and the main lens 51 in the lens layer 5. For example, since the main lens 51 and the auxiliary lens 52 having such a configuration are used in combination, the light extraction efficiency can be improved compared to the case where only the main lens 51 is used.

[0162] As reference Figure 1 , Figure 2 , Figures 9 to 17 As described in the drawings, the main lens 51 may be provided for each pixel 9, and when the lens layer 5 is viewed in a plan view (viewed in the Z-axis direction), the auxiliary lens 52 may be located at the edge portion of the pixel 9. Therefore, in the front direction of the pixel 9, not only the light at the center portion of the pixel 9 but also the light at the edge portion of the pixel 9 can be extracted.

[0163] As reference Figure 1 , Figure 2 , Figures 9 to 17 As described in , when the lens layer 5 is observed in a plan view (observed in the Z-axis direction), a portion of the auxiliary lens 52 may overlap a portion of at least one of the corresponding adjacent main lenses 51. Thus, for example, more light can be incident on the auxiliary lens 52 compared to a case where the auxiliary lens 52 and the main lens 51 do not overlap.

[0164] As reference Figure 1 , Figure 2 , Fig. 9 , Fig.10 , Figures 12 to 17 As described in , when the lens layer 5 is viewed in a plan view (viewed in the Z-axis direction), one auxiliary lens 52 may be located between adjacent main lenses 51. Alternatively, as described in , Fig.11 As described in , when the lens layer 5 is viewed in a plan view (viewed in the Z-axis direction), two or more auxiliary lenses 52 may be located between adjacent main lenses 51. Any number of auxiliary lenses 52 may be provided between adjacent main lenses 51 according to design or the like.

[0165] As reference Figure 1 , Figure 2 , Fig. 9 , Figures 11 to 17 As described in, for example, the auxiliary lens 52 may have a convex shape protruding toward the array of the plurality of main lenses 51 (in the negative Z-axis direction). The convex shape of the auxiliary lens 52 may include at least one of a semicircular, triangular, and trapezoidal shape. Figures 18 to 25 As described in , when the lens layer 5 is observed in a plan view (observed in the Z-axis direction), the auxiliary lens 52 may have an annular shape surrounding the main lens 51. The annular shape of the auxiliary lens 52 may include at least one of a circular annular shape and a rectangular annular shape. For example, an auxiliary lens 52 having various shapes may be used.

[0166] As reference Fig.15 As described in , the lens layer 5 may further include a plurality of main lenses 51-2 (second main lenses), which are arranged on a side opposite to the auxiliary lenses 52 across the array of the plurality of main lenses 51 and correspond to the plurality of main lenses 51. In this case, the lens layer 5 may further include an auxiliary lens 52-2 (second auxiliary lens), as shown in FIG. Fig.16 As described in , the auxiliary lens is arranged across the array of the plurality of main lenses 51-2 on the side opposite to the auxiliary lens 52. Thus, the light extraction efficiency can be further improved.

[0167] As reference Figure 2 , Figures 9 to 13 , Figures 15 to 17 As described in , the display device 1 may further include a color filter layer 4 provided between the light emitting element layer 3 and the lens layer 5. In this configuration, the light extraction efficiency can also be improved.

[0168] 5. Other Modifications

[0169] <First Modification>

[0170] Other modifications will be described. First, refer to Figures 27 to 33, the modification of the relationship between the normal line LN passing through the center of the pixel 9 (hereinafter, also referred to as a "sub-pixel"), the normal line LN' passing through the center of the main lens 51 (hereinafter, also referred to as a "lens member"), and the normal line LN passing through the center of the color filter 4R, etc. (hereinafter, also referred to as a "wavelength selection unit") will be described. Figures 27 to 33 : is a conceptual diagram for describing the relationship between a normal line LN passing through the center of a sub-pixel, a normal line LN′ passing through the center of a lens member, and a normal line LN″ passing through the center of a wavelength selection unit. Note that in the following description, the center of a sub-pixel is referred to as the center of a light emitting unit.

[0171] The size of the wavelength selection unit can be appropriately changed according to the light emitted from the sub-pixel. A light absorbing layer (black matrix layer) can be provided between the wavelength selection units of adjacent sub-pixels. In this case, the size of the light absorbing layer can be appropriately changed according to the light emitted from the sub-pixel. In addition, the size of the wavelength selection unit can be appropriately changed according to the distance (offset) d0 between the normal line passing through the center of the sub-pixel and the normal line passing through the center of the wavelength selection unit. The planar shape of the wavelength selection unit can be the same, similar or different from the planar shape of the lens member.

[0172] For example, Fig. 27 As shown, the normal line LN passing through the center of the light emitting unit, the normal line LN" passing through the center of the wavelength selection unit, and the normal line LN' passing through the center of the lens member can be consistent with each other. In other words, the distance (offset) D0 between the normal line passing through the center of the light emitting unit and the normal line passing through the center of the lens member, and the distance (offset) d0 between the normal line passing through the center of the light emitting unit and the normal line passing through the center of the wavelength selection unit can be similarly set to 0 (zero).

[0173] like Fig.28 As shown in , the normal line LN passing through the center of the light emitting unit and the normal line LN" passing through the center of the wavelength selection unit may coincide with each other, but the normal line LN passing through the center of the light emitting unit and the normal line LN" passing through the center of the wavelength selection unit may not coincide with the normal line LN' passing through the center of the lens member. In other words, D0≠d0=0 can be established.

[0174] like Fig.29 As shown in , the normal line LN passing through the center of the light emitting unit may be inconsistent with the normal line LN" passing through the center of the wavelength selection unit and the normal line LN' passing through the center of the lens member, and the normal line LN" passing through the center of the wavelength selection unit may be consistent with the normal line LN' passing through the center of the lens member. In other words, D0=d0>0 can be established.

[0175] like Fig.30As shown, the normal LN passing through the center of the light emitting unit may not coincide with the normal LN" passing through the center of the wavelength selection unit and the normal LN' passing through the center of the lens member, and the normal LN' passing through the center of the lens member may not coincide with the normal LN passing through the center of the light emitting unit and the normal LN" passing through the center of the wavelength selection unit. Here, the center of the wavelength selection unit (shown as a black circle) is preferably located on the straight line LL connecting the center of the light emitting unit and the center of the lens member (shown as a black circle). Specifically, when the distance from the center of the light emitting unit to the center of the wavelength selection unit in the thickness direction is LL1 and the distance from the center of the wavelength selection unit to the center of the lens member in the thickness direction is LL2, D0>d0>0 is established, and taking into account manufacturing variations, d0: D0=LL1: (LL1+LL2) is preferably satisfied.

[0176] The stacking relationship between the wavelength selection unit and the lens member can be interchanged. In this case, for example, Fig.31 As shown, a normal line LN passing through the center of the light emitting unit, a normal line LN" passing through the center of the wavelength selection unit, and a normal line LN' passing through the center of the lens member may coincide with each other. In other words, D0=d0=0 may be established.

[0177] like Fig.32 As shown, the normal line LN passing through the center of the light emitting unit may be inconsistent with the normal line LN" passing through the center of the wavelength selection unit and the normal line LN' passing through the center of the lens member, and the normal line LN" passing through the center of the wavelength selection unit may be consistent with the normal line LN' passing through the center of the lens member. In other words, D0=d0>0 can be established.

[0178] like Fig.33 As shown in , the normal LN passing through the center of the light emitting unit may not coincide with the normal LN" passing through the center of the wavelength selection unit and the normal LN' passing through the center of the lens member, and the normal LN' passing through the center of the lens member may not coincide with the normal LN passing through the center of the light emitting unit and the normal LN" passing through the center of the wavelength selection unit. Here, the center of the wavelength selection unit is preferably located on the straight line LL connecting the center of the light emitting unit and the center of the lens member. Specifically, when the distance from the center of the light emitting unit to the center of the wavelength selection unit (shown as a black circle) in the thickness direction is LL1 and the distance from the center of the wavelength selection unit to the center of the lens member (shown as a black circle) in the thickness direction is LL2, d0>D0>0 is established, and considering manufacturing variations, D0: d0=LL2: (LL1+LL2) is preferably satisfied.

[0179] <Second Modification>

[0180] The sub-pixel may have a resonator structure that resonates light generated in the light emitting element layer 3. Figures 34 to 40 Give a description. Figures 34 to 40 Schematic cross-sectional views for describing first to seventh embodiments of the resonant structure.

[0181] Hereinafter, an embodiment in which the above-mentioned pixel 9R, pixel 9B, and pixel 9B are sub-pixels will be described. Figures 46 to 52 In the drawings, these pixels are referred to and shown as sub-pixel 100R, sub-pixel 100G, and sub-pixel 100B, respectively. The light-emitting element layer 3 is an organic material layer of the OLED, and is referred to and shown as organic layer 204R, organic layer 204G, and organic layer 204B. The electrode layer 31 is referred to and shown as the first electrode 202. The electrode layer 32 is referred to and shown as the second electrode 206. The substrate 2 is referred to and shown as substrate 300 in the drawings.

[0182] (Resonator Structure: First Embodiment)

[0183] Fig.34 2 is a schematic cross-sectional view for describing a first embodiment of a resonator structure. In the first embodiment, a first electrode (eg, an anode electrode) 202 having a common film thickness is formed in each sub-pixel. The same applies to a second electrode (eg, a cathode electrode) 206.

[0184] like Fig.34 As shown, the reflective plate 401 is arranged below the first electrode 202 of the sub-pixel 100, and the optical adjustment layer 402 is interposed between the reflective plate 401 and the first electrode 202. A resonant cavity structure that resonates light generated by the organic layer (specifically, the light-emitting layer) 204 is formed between the reflective plate 401 and the second electrode 206.

[0185] The reflective plate 401 is formed to have the same film thickness in each sub-pixel 100. The film thickness of the optical adjustment layer 402 is different depending on the color displayed by the sub-pixel 100. Since the optical adjustment layers 402R, 402G, and 402B have different film thicknesses, the optical distance for causing the optimal resonance of the light wavelength can be set according to the color to be displayed.

[0186] exist Fig.34 In the illustrated embodiment, the upper surfaces of the reflective plates 401 in the sub-pixels 100R, 100G, and 100B are arranged to be aligned. As described above, since the film thickness of the optical adjustment layer 402 is different depending on the color displayed by the sub-pixel 100, the position of the upper surface of the second electrode 206 is different depending on the type of the sub-pixel 100R, 100G, and 100B.

[0187] The reflection plate 401 can be formed using, for example, a metal such as aluminum (Al), silver (Ag), or copper (Cu) or an alloy containing these as a main component.

[0188] The optical adjustment layer 402 may be made of inorganic insulating materials such as silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiOxNy), or organic resin materials such as acrylic resin and polyimide resin. The optical adjustment layer 402 may be a laminated film of a single layer or multiple layers. In addition, the number of laminated layers may vary depending on the type of the sub-pixel 100.

[0189] The first electrode 202 may be formed using, for example, a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), or zinc oxide (ZnO).

[0190] The second electrode 206 is preferably used as a semi-transmissive reflective film. The second electrode 206 can be formed using magnesium (Mg), silver (Ag), a magnesium-silver alloy (MgAg) containing these as main components, an alloy containing an alkali metal or an alkaline earth metal, or the like.

[0191] (Resonator Structure: Second Embodiment)

[0192] Fig.35 2 is a schematic cross-sectional view for describing a second embodiment of a resonator structure. Also in the second embodiment, in each sub-pixel 100, the first electrode 202 and the second electrode 206 are formed to have the same film thickness.

[0193] In addition, also in the second embodiment, the reflective plate 401 is arranged below the first electrode 202 of the sub-pixel 100, and the optical adjustment layer 402 is interposed between the reflective plate 401 and the sub-pixel electrode 202. A resonant cavity structure that resonates the light generated by the organic layer 204 is formed between the reflective plate 401 and the second electrode 206. As shown in the first embodiment, the reflective plate 401 having the same thickness is formed in each sub-pixel 100, and the thickness of the optical adjustment layer 402 is different according to the color to be displayed by the sub-pixel 100.

[0194] exist Fig.34 In the first embodiment shown in FIG. 1 , the upper surfaces of the reflective plates 401 in the sub-pixels 100R, 100G, and 100B are arranged to be aligned, and the position of the upper surface of the second electrode 206 varies depending on the types of the sub-pixels 100R, 100G, and 100B.

[0195] On the other hand, Fig.35In the second embodiment shown in FIG. 1 , the upper surface of the second electrode 206 is arranged to align in the sub-pixels 100R, 100G, and 100B. In order to align the upper surface of the second electrode 206, the upper surface of the reflector 401 in the sub-pixels 100R, 100G, and 100B is arranged differently according to the type of the sub-pixels 100R, 100G, and 100B. Therefore, the lower surface of the reflector 401 forms a stepped shape according to the type of the sub-pixels 100R, 100G, and 100B.

[0196] Materials constituting the reflection plate 401 , the optical adjustment layer 402 , the first electrode 202 , and the second electrode 206 and the like are similar to those described in the first example, and thus description thereof will be omitted.

[0197] (Resonator Structure: Third Embodiment)

[0198] Fig.36 2 is a schematic cross-sectional view for describing a third embodiment of a resonator structure. Also in the third embodiment, a first electrode 202 and a second electrode 206 having the same thickness are formed in each sub-pixel 100 .

[0199] Further, also in the third embodiment, the reflective plate 401 is arranged below the first electrode 202 of the sub-pixel 100, and the optical adjustment layer 402 is interposed between the reflective plate 401 and the first electrode 202. A resonant cavity structure that resonates the light generated by the organic layer 204 is formed between the reflective plate 401 and the second electrode 206. As in the first and second embodiments, the film thickness of the optical adjustment layer 402 is different depending on the color displayed by the sub-pixel 100. In addition, similar to the second embodiment, the position of the upper surface of the second electrode 206 is arranged to be aligned in the sub-pixels 100R, 100G, and 100B.

[0200] exist Fig.35 In the second embodiment shown, the lower surface of the reflection plate 401 is formed in a stepped shape according to the types of the sub-pixels 100R, 100G, and 100B so as to be aligned with the upper surface of the second electrode 206 .

[0201] On the other hand, Fig.36 In the third embodiment shown, the film thickness of the reflection plate 401 is made different according to the kind of the sub-pixel 100R, 100G, 100B. More specifically, the film thickness is set to align with the lower surface of the reflection plates 401R, 401G, and 401B.

[0202] Materials constituting the reflection plate 401 , the optical adjustment layer 402 , the first electrode 202 , and the second electrode 206 and the like are similar to those described in the first example, and thus description thereof will be omitted.

[0203] (Resonator Structure: Fourth Embodiment)

[0204] Fig.37 is a schematic cross-sectional view for describing a fourth embodiment of a resonator structure.

[0205] exist Fig.34 In the first embodiment shown, each first electrode 202 and each second electrode 206 in the sub-pixel 100 are formed with a common film thickness. In addition, the reflective plate 401 is arranged below the first electrode 202 of the sub-pixel 100, and the optical adjustment layer 402 is interposed between the reflective plate 401 and the first electrode 202.

[0206] On the other hand, Fig.37 In the fourth embodiment shown in , the optical adjustment layer 402 is omitted, and the film thickness of the first electrode 202 is set to be different according to the types of the sub-pixels 100R, 100G, and 100B.

[0207] The reflective plate 401 is formed to have the same film thickness in each sub-pixel 100. The film thickness of the first electrode 202 is different depending on the color to be displayed by the sub-pixel 100. Since the first electrodes 202R, 202G, and 202B have different film thicknesses, an optical distance for optimal resonance of the wavelength of light can be set according to the color to be displayed.

[0208] Materials and the like constituting the reflection plate 401 , the first electrode 202 , and the second electrode 206 are similar to those described in the first example, and thus description thereof will be omitted.

[0209] (Resonator Structure: Fifth Embodiment)

[0210] Fig.38 is a schematic cross-sectional view for describing a fifth embodiment of a resonator structure.

[0211] exist Fig.34 In the first embodiment shown, the first electrode 202 and the second electrode 206 are formed with a common film thickness in each sub-pixel 100. In addition, the reflective plate 401 is arranged below the first electrode 202 of the sub-pixel 100 with the optical adjustment layer 402 interposed therebetween.

[0212] On the other hand, Fig.38 In the fifth embodiment shown, the optical adjustment layer 402 is omitted, and instead, an oxide film 404 is formed on the surface of the reflective plate 401. The film thickness of the oxide film 404 differs depending on the type of the sub-pixel 100R, 100G, 100B.

[0213] The film thickness of the oxide film 404 differs depending on the display color of the sub-pixel 100. Since the oxide films 404R, 404G, and 404B have different film thicknesses, an optical distance for causing optimal resonance to the wavelength of light can be set according to the color to be displayed.

[0214] The oxide film 404 is a film obtained by oxidizing the surface of the reflective plate 401 and is made of, for example, aluminum oxide, tantalum oxide, titanium oxide, magnesium oxide, zirconium oxide, etc. The oxide film 404 serves as an insulating film for adjusting the optical path length (optical distance) between the reflective plate 401 and the second electrode 206.

[0215] The oxide film 404 having different film thicknesses can be formed depending on the types of the sub-pixels 100R, 100G, and 100B.

[0216] First, a container is filled with an electrolyte, and the substrate on which the reflection plate 401 is formed is immersed in the electrolyte. In addition, an electrode is arranged to face the reflection plate 401.

[0217] In addition, with the electrode as a reference, a positive voltage is applied to the reflector 401 to anodize the reflector 401. The film thickness of the oxide film caused by anodization is proportional to the voltage value relative to the electrode. Therefore, anodization is performed in a state where voltages corresponding to the types of the sub-pixels 100R, 100G, and 100B are applied to the reflectors 401R, 401G, and 401B, respectively. Thus, oxide films 404 with different film thicknesses can be formed at once.

[0218] Materials and the like constituting the reflection plate 401 , the first electrode 202 , and the second electrode 206 are similar to those described in the first example, and thus description thereof will be omitted.

[0219] (Resonator Structure: Sixth Embodiment)

[0220] Fig.39 1 is a schematic cross-sectional view of the sixth embodiment for describing the resonator structure. In the sixth embodiment, the sub-pixel 100 is configured by stacking the first electrode 202, the organic layer 204 and the second electrode 206. However, in the sixth embodiment, the first electrode 202 is formed to have the functions of an electrode and a reflector. The first electrode (also used as a reflector) 202 is made of a material having an optical constant selected according to the type of the sub-pixel 100R, 100G, and 100B. Since the phase shift of the first electrode (also used as a reflector) 202 is different, the optical distance for causing the wavelength of light to produce the best resonance can be set according to the color to be displayed.

[0221] The first electrode (also used as a reflector) 202 may be made of a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu), or an alloy containing these as a main component. For example, the first electrode (also used as a reflector) 202R of the sub-pixel 100R may be made of copper (Cu), and the first electrode (also used as a reflector) 202G of the sub-pixel 100G and the first electrode (also used as a reflector) 202B of the sub-pixel 100B may be made of aluminum.

[0222] The material and the like constituting the second electrode 206 are similar to those described in the first example, and thus the description thereof will be omitted.

[0223] (Resonator Structure: Seventh Embodiment)

[0224] Fig.40 : is a schematic cross-sectional view for describing a seventh embodiment of a resonator structure. In the seventh embodiment, basically, the sixth embodiment is applied to sub-pixels 100R and 100G, and the first embodiment is applied to sub-pixel 100B. In addition, in this configuration, the optical distance for causing the optimal resonance for the wavelength of light can be set according to the color to be displayed.

[0225] The first electrodes (also used as reflective plates) 202R and 202G used in the sub-pixels 100R and 100G may be made of a single metal such as aluminum (Al), silver (Ag), gold (Au), or copper (Cu) or an alloy containing these as a main component.

[0226] Materials and the like constituting the reflection plate 401B, the optical adjustment layer 402B, and the first electrode 202B used in the sub-pixel 100B are similar to those described in the first example, and thus description thereof will be omitted.

[0227] 6. Application Examples

[0228] For example, the technology according to the present disclosure can be applied to display units of various electronic devices, etc. Therefore, an embodiment of an electronic device to which the present technology can be applied will be described below.

[0229] <First Specific Embodiment>

[0230] Fig.41 is a front view showing an example of an appearance of a digital camera 500 . Fig.42 : is a rear view of an embodiment showing the appearance of a digital camera 500. The digital still camera 500 is a single-lens reflex type of an interchangeable lens, and includes an interchangeable imaging lens unit (interchangeable lens) 512 substantially at the center of the front of a camera body (camera body) 511, and includes a grip portion 513 to be gripped by a photographer on the left front side.

[0231] The monitor 514 is provided at a position offset to the left from the center of the rear of the camera body 511. An electronic viewfinder (eyepiece window) 515 is provided above the monitor 514. The photographer can look toward the electronic viewfinder 515 and visually recognize the optical image of the subject guided from the imaging lens unit 512 and determine the composition. The above-mentioned display device 1 can be used as the monitor 514 and the electronic viewfinder 515.

[0232] <Second Specific Embodiment>

[0233] Fig.43 600. The head-mounted display 600 includes ear hook portions 612 mounted on the user's head on both sides of a display unit 611 formed in glasses. In the head-mounted display 600, the above-described display device 1 can be used as the display unit 611.

[0234] <Third Specific Embodiment>

[0235] Fig.44 634 is an external view of the see-through head-mounted display 634. The see-through head-mounted display 634 includes a main body 632, an arm 633, and a lens barrel 631.

[0236] The body 632 is connected to the arm 633 and the glasses 630. Specifically, the end of the body 632 in the long side direction is connected to the arm 633, and one side of the side surface of the body 632 is connected to the glasses 630 via a connecting member. Note that the body 632 can be directly worn on the head of a human body.

[0237] The main body 632 includes a display unit and a control panel for controlling the operation of the see-through head mounted display 634. The arm 633 connects the main body 632 and the lens barrel 631 and supports the lens barrel 631. Specifically, the arm 633 is coupled to the end of the main body 632 and the end of the lens barrel 631, and fixes the lens barrel 631. In addition, the arm 633 includes a signal line for communicating data related to an image provided from the main body 632 to the lens barrel 631.

[0238] The lens barrel 631 projects image light supplied from the main body 632 via the arm 633 toward the eyes of the user wearing the see-through head-mounted display 634 through the eyepiece. In the see-through head-mounted display 634, the above-described display device 1 can be used for the display unit of the main body 632.

[0239] <Fourth Specific Embodiment>

[0240] Fig.45 An example of an appearance of a television device 710 is shown. The television device 710 includes, for example, an image display screen unit 711 including a front panel 712 and a filter glass 713, and the image display screen unit 711 includes the above-described display device 1.

[0241] <Fifth Specific Embodiment>

[0242] Fig.46 An embodiment of the appearance of a smartphone 800 is shown. The smartphone 800 includes a display unit 802 that displays various types of information, an operation unit including buttons that receive an operation input by a user, etc. The display unit 802 may be the display device 1 described above.

[0243] <Sixth Specific Embodiment>

[0244] Fig.47 and Fig.48 is a view showing an interior configuration of a car including a display device 1 according to an embodiment of the present disclosure. Specifically, Fig.59 is a view showing the state of the interior of the car from the rear to the front of the car, and Fig.60 It is a view showing the state of the interior of the vehicle from the oblique rear to the oblique front of the vehicle.

[0245] Fig.47 and Fig.48 The car shown in FIG. 1 includes a central display 911, a console display 912, a head-up display 913, a digital rear mirror 914, a steering wheel display 915, and a rear entertainment display 916. The above-mentioned display device 1 can be applied to some or all of these displays.

[0246] The central display 911 is arranged on the central console 907 at a location facing the driver's seat 901 and the passenger seat 902 . Fig.59 and Fig.60 An example of a central display 911 having a horizontally long shape extending from the driver's seat 901 side to the passenger seat 902 side is shown, but the screen size and arrangement position of the central display 911 are freely selectable. The central display 911 is capable of displaying information detected by various sensors (not shown). As a specific example, the central display 911 may display a captured image captured by an image sensor, a distance image to obstacles in front of or to the side of the vehicle measured by a time-of-flight (ToF) sensor, a passenger's body temperature detected by an infrared sensor, and the like. The central display 911 may be used to display, for example, at least one of safety-related information, operation-related information, life log, health-related information, authentication / identification-related information, and entertainment-related information.

[0247] Safety-related information is information such as dozing detection, looking away detection, prank detection of children riding together, presence or absence of wearing of seat belts, and detection of passengers leaving, and is information detected by, for example, a sensor (not shown) arranged to overlap the rear side of the central display 1911. Operation-related information uses a sensor to detect gestures related to the operation of the occupant. The detected gestures may include operations on various types of devices in the car. For example, operations on air conditioners, navigation devices, audio / video (AV) devices, lighting devices, etc. are detected. The life log includes the life logs of all occupants. For example, the life log includes a record of the actions of each passenger on board. Since the life log is acquired and stored, the condition of the passenger in the event of an accident can be confirmed. As health-related information, a temperature sensor is used to detect the body temperature of the occupant, and the health status of the occupant is estimated based on the detected body temperature. Alternatively, an image sensor can be used to capture an image of the occupant's face, and the health status of the occupant can be estimated from the captured facial expression. In addition, a conversation can be conducted with the occupant in an automatic voice, and the health status of the occupant can be estimated based on the content of the occupant's answer. Authentication / identification related information includes a keyless entry function that uses sensors to perform facial authentication, a function that automatically adjusts the height and position of a seat through facial recognition, etc. Entertainment related information includes a function in which a passenger uses sensors to detect operating information of an AV device, a function in which a sensor recognizes a passenger's face and provides content suitable for the passenger through an AV device, etc.

[0248] For example, the console display 912 may be used to display life log information. The console display 912 is arranged near the shift lever 908 of the center console 907 between the driver's seat 901 and the passenger seat 902. The console display 912 may also display information detected by different sensors (not shown). In addition, the console display 912 may display an image of the vehicle's periphery captured by an image sensor, or may display an image of the distance to obstacles around the vehicle.

[0249] The head-up display 913 is virtually displayed behind the windshield 904 in front of the driver's seat 901. The head-up display 913 can be used to display, for example, at least one of safety-related information, operation-related information, life log, health-related information, authentication / identification-related information, and entertainment-related information. In many cases, the head-up display 913 is virtually set in front of the driver's seat 901, and is therefore suitable for displaying information directly related to the operation of the car, for example, the speed of the car and the remaining amount of fuel (battery).

[0250] The digital rear mirror 914 can display not only the rear of the car but also the conditions of rear seat occupants, so that, for example, by arranging a sensor (not shown) to overlap with the back of the digital rear mirror 914, the digital rear mirror 914 can be used to display life log information.

[0251] The steering wheel display 915 is arranged near the center of the steering wheel 906 of the car. The steering wheel display 915 can be used to display, for example, at least one of safety-related information, operation-related information, life log, health-related information, authentication / identification-related information, and entertainment-related information. Specifically, the steering wheel display 915 is close to the driver's hand and is therefore suitable for displaying life log information such as the driver's body temperature, or suitable for displaying information about the operation of an AV device, an air conditioner, etc.

[0252] The rear entertainment display 916 is attached to the rear side of the driver's seat 901 or the passenger seat 902 and is observed by the passengers in the rear seats. The rear entertainment display 916 can be used to display, for example, at least one of safety-related information, operation-related information, life log, health-related information, authentication / identification-related information, and entertainment-related information. In particular, the rear entertainment display 916 is in front of the eyes of the passengers in the rear seats and thus displays information related to the passengers in the rear seats. For example, information about the operation of an AV device or an air conditioner can be displayed, or the result of measuring the body temperature of the passengers in the rear seats by a temperature sensor (not shown) can be displayed.

[0253] 7. Further Implementation Methods

[0254] In the above-described embodiment, it has been described that the refractive index of the auxiliary lens 52 (hereinafter, also referred to as "refractive index n1") may have a refractive index higher than the refractive index of the base 50 (hereinafter, also referred to as "refractive index n2") (n1>n2). However, even in the case where the refractive index n1 of the auxiliary lens 52 is lower than the refractive index n2 of the auxiliary lens 52 (n1<n2), the same effect can be obtained. Figures 49 to 72 This embodiment is described.

[0255] Fig.49 is a view showing an example of a schematic configuration of a display device according to another embodiment. The auxiliary lens 52 is formed using a low refractive index material having a lower refractive index than that of the base 50. The refractive index n1 of the auxiliary lens 52 is lower than the refractive index n2 of the base 50.

[0256] In this embodiment, the auxiliary lens 52 is a gap portion (also referred to as a slit, etc.), and its refractive index n1 may be the same as the refractive index of air. In addition, when the lens layer 5 is observed from the side (observed in a direction orthogonal to the Z-axis direction), the auxiliary lens 52 has an inverted triangular shape pointing downward (in the negative direction of the Z-axis). Such an auxiliary lens 52 also improves light extraction efficiency. Referring to FIG. Figure 50 to Figure 53 Give a description.

[0257] Figure 50 to Figure 53 2 is a diagram showing an embodiment of the traveling direction of light. Fig.50 As shown, auxiliary lens 52, more specifically auxiliary lens 52RG and auxiliary lens 52GB, make the traveling direction of light at the edge of pixel 9G close to the front direction (Z-axis positive direction). Although not shown, the same is true for pixel 9R and pixel 9B.

[0258] Fig.51 The relationship between the refractive index of the auxiliary lens and the propagation direction of light is schematically shown. For the sake of convenience, the surface of the boundary surface of the auxiliary lens 52 relative to the base 50 that is located near the corresponding main lens 51 (the surface on the side of the main lens 51) is called the boundary surface 52a. The boundary surface located at a position away from the corresponding main lens 51 (the boundary surface on the opposite side of the main lens 51) is called the boundary surface 52b. In addition, the normal line of the boundary surface 52a is actually represented by a dotted line in the figure. The traveling direction of the light from the main lens 51 that passes through the base 50 and is incident on the boundary surface 52a is close to the front direction through the auxiliary lens 52.

[0259] Results, such as Fig.52 As shown, in the front direction of the pixel 9G, not only the light at the center portion of the pixel 9G but also the light at the edge portion of the pixel 9G is extracted. The same applies to the pixel 9R and the pixel 9B.

[0260] It should be noted that, in the case where the refractive index n1 of the auxiliary lens 52 is higher than the refractive index n2 of the base 50 (n1>n2), as in the above-mentioned embodiment ( Figure 1 ) etc., the traveling direction of the light incident on the boundary surface 52b among the boundary surface 52a and the boundary surface 52b is close to the front direction through the auxiliary lens 52, such as Fig.53 as shown in .

[0261] Figure 54 to Figure 61 1 is a view showing an embodiment of a method for manufacturing a display device. Specifically, the formation of the auxiliary lens 52 will be described.

[0262] Figure 54 to Figure 58 An embodiment of a manufacturing method using an etching method is shown. First, Fig.54 As shown in FIG. 1 , the color filter layer 4 and the main lens 51 are formed by a known method. Fig.55As shown, the base 50 is provided by depositing the material of the base 50. The lens layer 5 in which the main lens 51 is embedded is obtained. Fig.56 As shown in FIG. 1 , the photoresist material PM is arranged on the lens layer 5. The photoresist material PM is coated on a portion of the lens layer 5 to obtain a pattern of the auxiliary lens 52. For example, as shown in FIG. Fig.57 As shown in , the lens layer 5 is processed by dry etching, and the auxiliary lenses 52 (in this example, the auxiliary lenses 52RG and 52GB) are obtained. Figure 8 As shown, the photoresist material PM is removed, and the lens layer 5 including the auxiliary lens 52 is obtained. In the case where the auxiliary lens 52 has a configuration other than a void portion, a process for filling the void portion with a low refractive material may be further added.

[0263] Figure 59 to Figure 61 An embodiment of a manufacturing method using an imprinting method is shown. As a premise, it is assumed that the above-mentioned Fig.55 However, the material of the base 50 is in a state before being applied and cured. Fig.59 As shown, the mold M is pressed against the material of the base 50. The mold M has a protrusion Ma protruding downward (in the negative direction of the Z axis). The protrusion Ma has the same shape as the auxiliary lens 52. In this state, ultraviolet rays are emitted to cure the material of the base 50, as shown in FIG. Fig.60 Afterwards, Fig.61 As shown, when the mold M is removed, the lens layer 5 including the auxiliary lens 52 is obtained. In the case where the auxiliary lens 52 has a configuration other than a void portion, a process for filling the void portion with a low refractive material may be further added.

[0264] 8. Variation of cross-sectional structure

[0265] Figure 62 to Figure 65 : is a view showing a variation of the cross-sectional structure. In the side view of the lens layer 5, the auxiliary lens 52 has a rectangular shape. The rectangular shape exemplified is a rectangular shape whose longitudinal direction is a vertical direction (Z-axis direction).

[0266] like Fig.63 As shown in , light incident on the boundary surface 52a at a critical angle propagates in the front direction. Therefore, the traveling direction of light at the edge portion of the pixel 9G approaches the front direction through the auxiliary lens 52. The same applies to the pixel 9R and the pixel 9B.

[0267] In one embodiment, an additional auxiliary lens having a refractive index similar to that of the auxiliary lens 52 may be provided not only at the edge portion of the pixel 9 but also at the central portion of the pixel 9. Such an additional auxiliary lens is referred to as an auxiliary lens 53 to be distinguished from the auxiliary lens 52.

[0268] exist Fig.64 and Fig.65 In the embodiment shown in , the lens layer 5 also includes an auxiliary lens 53. The auxiliary lens 53 is located directly above the main lens 51. When the lens layer 5 is observed in a plan view (observed in the Z-axis direction), the auxiliary lens 53 overlaps with the main lens 51. In addition, in the figure, the auxiliary lens 53 disposed directly above the main lens 51 of the pixel 9G is referred to as an auxiliary lens 53G. Although not shown, the additional auxiliary lens 53 may be similarly disposed in the pixel 9R and the pixel 9G, which may be referred to as the auxiliary lens 53R and the auxiliary lens 53G, respectively.

[0269] Even in the case where the light incident on the auxiliary lens 53 includes light whose traveling direction deviates from the front direction, the traveling direction of the light is brought closer to the front direction by the auxiliary lens 53. This increases the possibility that the light extraction efficiency can be further improved. Fig.64 and Fig.65 In the embodiment shown in , a plurality of auxiliary lenses 53 are provided for one main lens 51. Compared with the case where only one auxiliary lens 53 is provided, the effect obtained by the auxiliary lens 53 can be improved.

[0270] Note that in addition to the above, modifications of the cross-sectional structures of the above-described embodiments may be used in combination as long as there is no contradiction. Figures 9 to 17 ).

[0271] 9. Variation of floor plan

[0272] Figures 66 to 72 is a view showing a variation of the plan layout.

[0273] exist Figure 66 to Figure 69 In the embodiment shown in FIG. 1 , when the lens layer 5 is viewed in a plan view (viewed in the Z-axis direction), the auxiliary lens 52 has an annular shape surrounding the main lens 51. The annular shape may be as follows: Fig.66 and Fig.67 The rectangular ring shape shown in FIG. 1 (in this example, a hexagonal ring shape) or may be as shown in FIG. Fig.68 and Fig.69 The donut shape shown in .

[0274] Figure 70 to Figure 72 An embodiment of a planar layout including an auxiliary lens 53 is shown. Fig.70 and Fig.71 In the illustrated embodiment, the auxiliary lens 53 has an annular shape, for example, a rectangular annular shape or a circular annular shape similar to the auxiliary lens 52. Fig.72 In the illustrated embodiment, the auxiliary lens 53 has a radial shape extending radially from the center of the main lens 51 .

[0275] Note that in addition to the above, modifications of the planar layout of the above-described embodiments may be used in combination as long as there is no contradiction. Figures 18 to 26 ).

[0276] For example, the technology according to another embodiment described above is defined as follows. Figures 49 to 52 , Figure 62 to Figure 72 As described in , the auxiliary lens 52 may have a refractive index n1 lower than a refractive index n2 of a portion (base 50) between the auxiliary lens 52 and the main lens 51 in the lens layer 5. With such an auxiliary lens 52, light extraction efficiency can also be improved.

[0277] As reference Fig.49 , Fig.62 As described in the side view of the lens layer 5, the auxiliary lens 52 may have a triangular shape or a rectangular shape. For example, by using the auxiliary lens 52 having such a shape, even when the refractive index n1 of the auxiliary lens 52 is low, the light extraction efficiency can be improved.

[0278] In addition, see Fig.64 , Fig.65 , Figure 70 to Figure 72 As described in , etc., the lens layer 5 may include an auxiliary lens 53 (additional auxiliary lens) arranged on a side opposite to the light emitting element layer 3 across an array of a plurality of main lenses 51, the auxiliary lens 53 may have a refractive index n2 lower than the refractive index n1 of a portion (base 50) between the auxiliary lens 53 and the main lens 51 in the lens layer 5, and may have a rectangular shape in a side view of the lens layer 5, and the auxiliary lens 53 may overlap with the main lens 51 in a plan view of the lens layer 5. In a plan view of the lens layer 5, the auxiliary lens 53 may have an annular shape or a radial shape. Since such an auxiliary lens 53 is provided, the possibility of further improving the light extraction efficiency is increased compared to the case where only the main lens 51 and the auxiliary lens 52 are provided.

[0279] It should be noted that the effects described in the present disclosure are merely examples and are not limited to the disclosed contents. There may be other effects.

[0280] Although the above description is given about the embodiments of the present disclosure, the technical scope of the present disclosure is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present disclosure. In addition, constituent elements in different embodiments and modified examples can be appropriately combined.

[0281] It should be noted that the present technology can also have the following configurations.

[0282] (1) A display device comprising:

[0283] a light emitting element layer disposed on a substrate; and

[0284] a lens layer disposed on a side opposite to the substrate across the light emitting element layer,

[0285] The lens layer includes:

[0286] A plurality of main lenses arranged in an array in a plane direction of the lens layer; and

[0287] an auxiliary lens, arranged on an opposite side of the light emitting element layer across an array of a plurality of primary lenses, and

[0288] In a plan view of the lens layer, the auxiliary lenses are located between adjacent main lenses among the plurality of main lenses.

[0289] (2) The display device according to (1), wherein:

[0290] The main lens makes the traveling direction of the light from the light emitting element layer close to the front direction of the display device, and

[0291] The auxiliary lens makes the traveling direction of the light from the main lens closer to the front direction.

[0292] (3) The display device according to (1) or (2), wherein:

[0293] The auxiliary lens has a higher refractive index than a refractive index of a portion between the auxiliary lens and the main lens in the lens layer.

[0294] (4) The display device according to (1) or (2), wherein:

[0295] The auxiliary lens has a refractive index lower than a refractive index of a portion between the auxiliary lens and the main lens in the lens layer.

[0296] (5) The display device according to (4), wherein:

[0297] The auxiliary lens has a triangular shape or a rectangular shape in a side view of the lens layer.

[0298] (6) The display device according to (4) or (5), wherein:

[0299] The lens layer includes an additional auxiliary lens, which is arranged on the opposite side of the light emitting element layer across the array of the plurality of main lenses.

[0300] the additional auxiliary lens has a lower refractive index than a refractive index of a portion between the additional auxiliary lens and the main lens in the lens layer, and has a rectangular shape in a side view of the lens layer, and

[0301] The additional auxiliary lens overlaps the main lens in a plan view of the lens layer.

[0302] (7) The display device according to (6), wherein:

[0303] The additional auxiliary lens has a ring shape or a radial shape in a plan view of the lens layer.

[0304] (8) The display device according to any one of (1) to (7), wherein:

[0305] The main lenses are respectively provided for the pixels, and

[0306] The auxiliary lens is located at an edge portion of the pixel in a plan view of the lens layer.

[0307] (9) The display device according to any one of (1) to (8), wherein:

[0308] In a plan view of the lens layer, a portion of the auxiliary lens overlaps a portion of at least one of the corresponding adjacent main lenses.

[0309] (10) The display device according to any one of (1) to (9), wherein:

[0310] An auxiliary lens is provided as an auxiliary lens located between adjacent main lenses in a plan view of the lens layer.

[0311] (11) The display device according to any one of (1) to (9), wherein:

[0312] Two or more auxiliary lenses are provided as auxiliary lenses located between adjacent main lenses in a plan view of the lens layer.

[0313] (12) A display device according to any one of 1 to 3 and 8 to 11, but excluding the features mentioned in 4 to 7, wherein:

[0314] The auxiliary lens has a convex shape protruding toward the array of the plurality of main lenses.

[0315] (13) The display device according to (12), wherein:

[0316] The convex shape of the auxiliary lens includes at least one of a semicircular, triangular, and trapezoidal shape.

[0317] (14) The display device according to any one of (1) to (13), wherein:

[0318] In a plan view of the lens layer, the auxiliary lens has a ring shape surrounding each main lens.

[0319] (15) The display device according to (14), wherein:

[0320] The annular shape of the auxiliary lens includes at least one of a circular annular shape and a rectangular annular shape.

[0321] (16) The display device according to any one of (1) to (15), wherein:

[0322] The lens layer further includes a plurality of second main lenses which are disposed on a side opposite to the auxiliary lenses across the array of the plurality of main lenses and correspond to the plurality of main lenses.

[0323] (17) The display device according to (16), wherein:

[0324] The lens layer further includes a second auxiliary lens disposed on an opposite side of the auxiliary lens across the array of the plurality of second main lenses.

[0325] (18) The display device according to any one of (1) to (17), further comprising:

[0326] The color filter layer is arranged between the light emitting element layer and the lens layer.

[0327] Reference Numbers List

[0328] 1 Display device

[0329] 2 Base

[0330] 21 Contact plug

[0331] 21R Contact Plug

[0332] 21G Contact Plug

[0333] 21B Contact Plug

[0334] 3 Light-emitting element layer

[0335] 31 Electrode layer

[0336] 311 Electrode

[0337] 311R Electrode

[0338] 311G Electrode

[0339] 311B Electrode

[0340] 312 Electrode edge film

[0341] 32 Electrode layer

[0342] 33 Organic layer

[0343] 34 Protective layer

[0344] 35 Planarization layer

[0345] 4 Color filter layers

[0346] 41 Color Filters

[0347] 41R filter

[0348] 41G Color Filter

[0349] 41B Color Filter

[0350] 5 Lens layer

[0351] 51R main lens

[0352] 51G Main lens

[0353] 51B Main lens

[0354] 51-2R main lens

[0355] 51-2G main lens

[0356] 51-2B main lens

[0357] 52RG auxiliary lens

[0358] 52GB auxiliary lens

[0359] 52RB auxiliary lens

[0360] 52-2RG Auxiliary lens

[0361] 52-2GB auxiliary lens

[0362] 52a Boundary surface

[0363] 52b Boundary surface

[0364] 53 auxiliary lens (additional auxiliary lens)

[0365] 53G Auxiliary lens

[0366] 9 pixels

[0367] 9R Pixel

[0368] 9G Pixels

[0369] 9B pixels

[0370] PM Photoresist Materials

[0371] M mold

[0372] Ma protrusion

Claims

1. A display device, comprising: A light emitting element layer is disposed on the substrate; as well as a lens layer, arranged on a side opposite to the substrate across the light emitting element layer, Wherein, the lens layer comprises: a plurality of main lenses arranged in an array in a plane direction of the lens layer; and an auxiliary lens disposed across the array of the plurality of main lenses on a side opposite to the light emitting element layer, and In a plan view of the lens layer, the auxiliary lens is located between adjacent main lenses among the plurality of main lenses.

2. The display device according to claim 1, wherein: The main lens makes the traveling direction of the light from the light emitting element layer close to the front direction of the display device, and The auxiliary lens makes the traveling direction of the light from the main lens closer to the front direction.

3. The display device according to claim 1, wherein: The auxiliary lens has a higher refractive index than a refractive index of a portion between the auxiliary lens and the main lens in the lens layer.

4. The display device according to claim 1, wherein: The auxiliary lens has a refractive index lower than a refractive index of a portion between the auxiliary lens and the main lens in the lens layer.

5. The display device according to claim 4, wherein: The auxiliary lens has a triangular shape or a rectangular shape in a side view of the lens layer.

6. The display device according to claim 4, wherein: The lens layer includes an additional auxiliary lens, which is arranged on a side opposite to the light emitting element layer across the array of the plurality of main lenses, the additional auxiliary lens has a lower refractive index than a refractive index of a portion between the additional auxiliary lens and the main lens in the lens layer and has a rectangular shape in a side view of the lens layer, and The additional auxiliary lens overlaps the main lens in a plan view of the lens layer.

7. The display device according to claim 6, wherein: The additional auxiliary lens has a ring shape or a radial shape in a plan view of the lens layer.

8. The display device according to claim 1, wherein: The main lenses are respectively arranged for pixels, and The auxiliary lens is located at an edge portion of the pixel in a plan view of the lens layer.

9. The display device according to claim 1, wherein: In a plan view of the lens layer, a portion of the auxiliary lens overlaps a portion of at least one of the corresponding adjacent main lenses.

10. The display device according to claim 1, wherein: One auxiliary lens is provided as the auxiliary lens located between adjacent main lenses in a plan view of the lens layer.

11. The display device according to claim 1, wherein: Two or more auxiliary lenses are provided as the auxiliary lenses located between adjacent main lenses in a plan view of the lens layer.

12. The display device according to claim 1, wherein: The auxiliary lens has a convex shape protruding toward the array of the plurality of main lenses.

13. The display device according to claim 12, wherein: The convex shape of the auxiliary lens includes at least one of a semicircular shape, a triangular shape, and a trapezoidal shape.

14. The display device according to claim 1, wherein: In a plan view of the lens layer, the auxiliary lens has a ring shape surrounding each of the main lenses.

15. The display device according to claim 14, wherein: The annular shape of the auxiliary lens includes at least one of a circular annular shape and a rectangular annular shape.

16. The display device according to claim 1, wherein: The lens layer further includes a plurality of second main lenses which are disposed on a side opposite to the auxiliary lenses across the array of the plurality of main lenses and correspond to the plurality of main lenses.

17. The display device according to claim 16, wherein: The lens layer further includes a second auxiliary lens disposed on a side opposite to the auxiliary lens across the array of the plurality of second main lenses.

18. The display device according to claim 1, further comprising: The color filter layer is disposed between the light emitting element layer and the lens layer.

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