Display device and electronic device

Abstract

To provide a display device having excellent viewing angle characteristics and an electronic device having such a display device.SOLUTION: A display device according to the present invention includes a substrate, a lens layer including a lens, a pixel electrode arranged between the substrate and the lens layer, and a color filter arranged between the pixel electrode and the lens layer, the color filter has a colored portion that overlaps a part of the pixel electrode in plan view between the substrate and the lens layer, the pixel electrode is provided in a display area for displaying an image, the lens overlaps a part of the pixel electrode in plan view, and the distance between the center of the pixel electrode and the display center of the display area is shorter than the distance between the center of the lens and the display center in plan view.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a display device and an electronic device. [Background technology]

[0002] Display devices such as organic EL display devices using organic EL (electroluminescence) elements are known. Patent Document 1 discloses an organic EL device including an organic EL element having a pixel electrode and a color filter that transmits light in a predetermined wavelength range. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-153607 A Summary of the Invention [Problem to be solved by the invention]

[0004] For a display device equipped with a color filter such as that disclosed in Patent Document 1, it is desired to improve the viewing angle characteristics or expand the radiation angle. [Means for solving the problem]

[0005] One aspect of the display device of the present invention comprises a substrate, a lens layer including a lens, a pixel electrode arranged between the substrate and the lens layer, and a color filter arranged between the pixel electrode and the lens layer, the color filter having a colored portion that overlaps with a portion of the pixel electrode in a planar view between the substrate and the lens layer, the pixel electrode being provided in a display region that displays an image, the lens overlapping with a portion of the pixel electrode in the planar view, and the distance between the center of the pixel electrode and the display center of the display region in the planar view is shorter than the distance between the center of the lens and the display center. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a plan view showing a display device in a first embodiment. [Diagram 2] FIG. 2 is an equivalent circuit diagram of a sub-pixel in the first embodiment. [Diagram 3] 1 is a diagram showing a partial cross section of a display device in a first embodiment. [Figure 4] FIG. 2 is a plan view showing a pixel electrode in the first embodiment. [Diagram 5] FIG. 2 is a plan view showing a part of a color filter in the first embodiment. [Figure 6] FIG. 2 is a plan view showing a part of a lens layer in the first embodiment. [Figure 7] 3 is a diagram for explaining the arrangement of pixel electrodes, lenses, and coloring portions in the first embodiment. FIG. [Figure 8] FIG. 2 is a diagram for explaining an optical path in the first embodiment. [Figure 9] FIG. 2 is a diagram for explaining an optical path in the first embodiment. [Figure 10] 4 is a flow chart showing a method for manufacturing the display device according to the first embodiment. [Figure 11] FIG. 4 is a diagram for explaining a lens layer forming step in the first embodiment. [Figure 12] FIG. 4 is a diagram for explaining a lens layer forming step in the first embodiment. [Figure 13] FIG. 4 is a diagram for explaining a lens layer forming step in the first embodiment. [Figure 14] FIG. 4 is a diagram for explaining a lens layer forming step in the first embodiment. [Figure 15] FIG. 4 is a view for explaining a light transmitting layer forming step in the first embodiment. [Figure 16] FIG. 11 is a diagram illustrating a display device according to a second embodiment. [Figure 17] FIG. 11 is a diagram illustrating a display device according to a second embodiment. [Figure 18] FIG. 13 is a diagram illustrating a display device according to a third embodiment. [Figure 19]13A to 13C are diagrams illustrating a manufacturing method of a display device according to a third embodiment. [Figure 20] FIG. 13 is a diagram illustrating a display device according to a fourth embodiment. [Figure 21] FIG. 13 is a plan view showing a modified example of the pixel electrode and the lens. [Figure 22] 11A and 11B are cross-sectional views showing modified examples of the colored portion and the lens. [Figure 23] 11A and 11B are cross-sectional views showing modified examples of the colored portion and the lens. [Figure 24] FIG. 13 is a plan view showing a modified example of a color filter. [Diagram 25] 13A and 13B are plan views showing modified examples of pixel electrodes, lenses, and colored portions. [Figure 26] 13A and 13B are plan views showing modified examples of pixel electrodes, lenses, and colored portions. [Figure 27] 13A and 13B are plan views showing modified examples of pixel electrodes, lenses, and colored portions. [Figure 28] 13A and 13B are plan views showing modified examples of pixel electrodes, lenses, and colored portions. [Figure 29] FIG. 2 is a diagram illustrating a schematic view of a part of the internal structure of the virtual image display device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that the dimensions and scale of each part in the drawings may differ from the actual ones, and some parts are shown diagrammatically to facilitate understanding. Furthermore, the scope of the present invention is not limited to these embodiments unless otherwise specified in the following description to the effect that the present invention is limited thereto.

[0008] 1. First embodiment 1A.Display device 100 FIG. 1 is a plan view showing a display device 100 in the first embodiment. For convenience of explanation, the following description will be given using the mutually orthogonal x-axis, y-axis, and z-axis shown in FIG. 1 as appropriate. An element substrate 1 of the display device 100 described below is parallel to the xy plane. Moreover, "planar view" refers to viewing from the -z direction. The direction in which a light-transmitting substrate 9 and an element substrate 1 described below overlap is parallel to the -z direction. The thickness direction of an element substrate 1 described below is parallel to the -z direction. Moreover, in the following description, light-transmitting property means transparency to visible light, and preferably refers to a visible light transmittance of 50% or more.

[0009] The display device 100 is an organic EL (electroluminescence) display device that displays full-color images. Images include images that display only text information. The display device 100 has an element substrate 1 and a light-transmitting substrate 9 that is located on the +z-axis side of the element substrate 1 and has light-transmitting properties. The display device 100 has a so-called top emission structure. The display device 100 emits light from the light-transmitting substrate 9. The light-transmitting substrate 9 is a cover that protects the element substrate 1.

[0010] The element substrate 1 has a display region A10 for displaying an image and a peripheral region A20 surrounding the display region A10 in a planar view. The shape of the display region A10 in a planar view is a rectangle, but is not limited to this and may be another polygonal shape. The shape of the display region A10 in a planar view does not have to be a perfect rectangle, and may have rounded corners or may be partially missing. The element substrate 1 also has a plurality of pixels P, a data line driving circuit 101, a scanning line driving circuit 102, a control circuit 103, and a plurality of external terminals 104.

[0011] The display area A10 is composed of a plurality of pixels P. Each pixel P is the smallest unit for displaying an image. The pixels P are arranged in a matrix along the +x and +y directions. Each pixel P has a sub-pixel PB that obtains light in the blue wavelength region, a sub-pixel PG that obtains light in the green wavelength region, and a sub-pixel PR that obtains light in the red wavelength region. The shape of each of the sub-pixels PB, PG, and PR in a plan view is approximately rectangular. The sub-pixels PB, PG, and PR are arranged in the same color along the +x direction, and are arranged in the order of blue, green, and red along the +y direction. When the sub-pixels PB, PG, and PR are not distinguished from each other, they are referred to as sub-pixels P0. The sub-pixels P0 are elements that constitute the pixel P. The sub-pixels P0 are an example of a unit circuit that is the smallest unit of an image to be displayed, and one pixel of a color image is expressed by the sub-pixels PB, PG, and PR. The sub-pixels P0 are controlled independently of the other sub-pixels P0.

[0012] A data line driving circuit 101, a scanning line driving circuit 102, a control circuit 103, and a plurality of external terminals 104 are arranged in the peripheral region A20 of the element substrate 1. The data line driving circuit 101 and the scanning line driving circuit 102 are peripheral circuits that control the driving of each part constituting the plurality of sub-pixels P0. The control circuit 103 controls the display of an image. The control circuit 103 is supplied with image data and the like from a higher-level circuit (not shown). The control circuit 103 supplies various signals based on the image data to the data line driving circuit 101 and the scanning line driving circuit 102. The external terminals 104 are connected to an FPC (Flexible printed circuits) board or the like for achieving electrical connection with a higher-level circuit (not shown). In addition, a power supply circuit (not shown) is electrically connected to the element substrate 1.

[0013] FIG. 2 is an equivalent circuit diagram of the sub-pixel P0 in the first embodiment. As shown in FIG. 2, the element substrate 1 is provided with a scanning line 13 and a data line 14. The scanning line 13 extends along the +y direction. The data line 14 extends along the +x direction. The scanning lines 13 and the data lines 14 are provided in a plurality of numbers. The plurality of scanning lines 13 and the plurality of data lines 14 are arranged in a lattice pattern. The plurality of scanning lines 13 are connected to the scanning line driving circuit 102 shown in FIG. 1. The plurality of data lines 14 are connected to the data line driving circuit 101 shown in FIG. 1. The sub-pixel P0 is provided corresponding to each intersection of the plurality of scanning lines 13 and the plurality of data lines 14. Here, the pixel electrode 23 is provided in each sub-pixel P0. The pixel electrodes 23 can be set to be different from each other independently of the other pixel electrodes 23. More specifically, the pixel electrodes 23 may be set to pass different currents, or different voltages may be set to the pixel electrodes 23.

[0014] Each subpixel P0 includes an organic EL element 20 and a pixel circuit 30 that controls driving of the organic EL element 20. The organic EL element 20 has a pixel electrode 23, a common electrode 25, and a functional layer 24 disposed therebetween. The pixel electrode 23 functions as an anode. The common electrode 25 functions as a cathode. In the organic EL element 20, holes supplied from the pixel electrode 23 and electrons supplied from the common electrode 25 are recombined in the functional layer 24, causing the functional layer 24 to generate light. A power supply line 16 is electrically connected to the common electrode 25. A low-level power supply potential Vct is supplied to the power supply line 16 from a power supply circuit (not shown).

[0015] The pixel circuit 30 includes a switching transistor 31, a driving transistor 32, and a storage capacitor 33. The gate of the switching transistor 31 is electrically connected to the scanning line 13. One of the source or drain of the switching transistor 31 is electrically connected to the data line 14, and the other is electrically connected to the gate of the driving transistor 32. One of the source or drain of the driving transistor 32 is electrically connected to a power supply line 15, and the other is electrically connected to the pixel electrode 23. A high-level power supply potential Vel is supplied to the power supply line 15 from a power supply circuit (not shown). One electrode of the storage capacitor 33 is connected to the gate of the driving transistor 32, and the other electrode is connected to the power supply line 15.

[0016] When the scanning line driving circuit 102 activates a scanning signal to select a scanning line 13, the switching transistor 31 provided in the selected sub-pixel P0 is turned on. Then, a data signal is supplied from the data line 14 to the driving transistor 32 corresponding to the selected scanning line 13. The driving transistor 32 supplies a current corresponding to the potential of the supplied data signal, i.e., the potential difference between the gate and the source, to the organic EL element 20. Then, the organic EL element 20 emits light with a luminance corresponding to the magnitude of the current supplied from the driving transistor 32. When the scanning line driving circuit 102 cancels the selection of the scanning line 13 and the switching transistor 31 is turned off, the potential of the gate of the driving transistor 32 is held by the holding capacitance 33. Therefore, the organic EL element 20 can emit light even after the switching transistor 31 is turned off.

[0017] It should be noted that the configuration of the pixel circuit 30 is not limited to the illustrated configuration. For example, the pixel circuit 30 may further include a transistor that controls conduction between the pixel electrode 23 and the driving transistor 32.

[0018] Fig. 3 is a diagram showing a partial cross section of the display device 100 in the first embodiment, and corresponds to the cross section of the display device 100 taken along line AA in Fig. 1. Fig. 3 shows a partial cross section near the outer edge of the display region A10.

[0019] As shown in FIG. 3, the element substrate 1 includes a substrate 10, a reflective layer 21, an insulating layer 22, an element portion 2, a protective layer 4, a color filter 5, a lens layer 61, and a light-transmitting layer 62. The reflective layer 21 includes a plurality of reflective portions 210. The element portion 2 includes a plurality of pixel electrodes 23, a functional layer 24, and a common electrode 25. That is, the element portion 2 includes a plurality of organic EL elements 20 described above. The color filter 5 includes a plurality of colored portions 51. The lens layer 61 includes a plurality of lenses 610. The reflective layer 21, the insulating layer 22, the element portion 2, the protective layer 4, the color filter 5, the lens layer 61, and the light-transmitting layer 62 are arranged in this order from the substrate 10 toward the light-transmitting substrate 9.

[0020] Each subpixel P0 is provided with one reflecting portion 210, one pixel electrode 23, one coloring portion 51, and one lens 610. In the following, the pixel electrode 23 provided in the subpixel PB is referred to as the "pixel electrode 23B", the pixel electrode 23 provided in the subpixel PG is referred to as the "pixel electrode 23G", and the pixel electrode 23 provided in the subpixel PR is referred to as the "pixel electrode 23R". When the pixel electrodes 23B, 23G, and 23R are not distinguished from each other, they are referred to as the pixel electrode 23. Similarly, the coloring portion 51 provided in the subpixel PB is referred to as the "coloring portion 51B", the coloring portion 51 provided in the subpixel PG is referred to as the "coloring portion 51G", and the coloring portion 51 provided in the subpixel PR is referred to as the "coloring portion 51R". When the coloring portions 51B, 51G, and 51R are not distinguished from each other, they are referred to as the coloring portion 51. Hereinafter, each portion of the display device 100 will be described in order.

[0021] The substrate 10 is a wiring substrate on which the pixel circuit 30 is formed, for example, on a base material made of a silicon substrate. The base material may be made of glass, resin, ceramic, or the like. In this embodiment, since the display device 100 is a top emission type, the base material may or may not have light-transmitting properties. In addition, the switching transistor 31 and the driving transistor 32 of the pixel circuit 30 may each be a MOS type transistor having an active layer, and for example, the active layer may be made of a silicon substrate. The switching transistor 31 and the driving transistor 32 of the pixel circuit 30 may be a thin film transistor or a field effect transistor. Examples of materials for the components and wiring of the pixel circuit 30 include conductive materials such as polysilicon, metal, metal silicide, and metal compound.

[0022] The substrate 10 is provided with a reflective layer 21 having optical reflectivity. The reflective layer 21 has a plurality of reflective portions 210, which are arranged, for example, in a matrix in plan view. Each reflective portion 210 is arranged corresponding to one pixel electrode 23. That is, the reflective portions 210 and the pixel electrodes 23 are arranged in a one-to-one relationship. Furthermore, each reflective portion 210 overlaps with the pixel electrode 23 in plan view. Each such reflective portion 210 reflects light generated in the light-emitting layer 240 of the functional layer 24. Therefore, each reflective portion 210 has optical reflectivity.

[0023] Examples of materials for the reflective layer 21 include metals such as Al (aluminum) and Ag (silver), and alloys of these metals. The reflective layer 21 may also function as wiring that is electrically connected to the pixel circuits 30.

[0024] An insulating layer 22 having insulating properties is disposed on the reflective layer 21. The insulating layer 22 has a first insulating film 221, a second insulating film 222, a third insulating film 223, and a fourth insulating film 224. The first insulating film 221 is disposed to cover the reflective layer 21. The first insulating film 221 is formed in common across the sub-pixels PB, PG, and PR. The first insulating film 221 overlaps with the pixel electrodes 23B, 23G, and 23R in a planar view. The second insulating film 222 is disposed on the first insulating film 221. The second insulating film 222 overlaps with the pixel electrode 23R in a planar view, and does not overlap with the pixel electrodes 23B and 23G in a planar view. The third insulating film 223 is disposed to cover the second insulating film 222. The third insulating film 223 overlaps with the pixel electrodes 23R and 23G in a planar view, and does not overlap with the pixel electrode 23B in a planar view. The fourth insulating film 224 covers the outer edges of the pixel electrodes 23B, 23G, and 23R.

[0025] The insulating layer 22 adjusts the optical distance L0, which is the optical distance between the reflective portion 210 and a common electrode 25 described below. The optical distance L0 differs for each emitted color. The optical distance L0 in the sub-pixel PB is set corresponding to light in the blue wavelength region. The optical distance L0 in the sub-pixel PG is set corresponding to light in the green wavelength region. The optical distance L0 in the sub-pixel PR is set corresponding to light in the red wavelength region. In this embodiment, the thickness of the insulating layer 22 differs between the sub-pixels PB, PG, and PR, and therefore the optical distance L0 differs for each emitted color.

[0026] Examples of materials constituting the layers constituting the insulating layer 22 include silicon-based inorganic materials such as silicon oxide and silicon nitride. The configuration of the insulating layer 22 is not limited to the configuration shown in Fig. 3. In Fig. 3, the third insulating film 223 is disposed on the second insulating film 222, but for example, the second insulating film 222 may be disposed on the third insulating film 223.

[0027] A plurality of pixel electrodes 23 are disposed on the insulating layer 22. The plurality of pixel electrodes 23 are disposed between the substrate 10 and a lens layer 61 described later. The pixel electrodes 23 are translucent. Examples of materials constituting the pixel electrodes 23 include transparent conductive materials such as ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide). The plurality of pixel electrodes 23 are electrically insulated from each other by the insulating layer 22. The pixel electrode 23B is disposed on the surface of the first insulating film 221 on the +z-axis side. The pixel electrode 23G is disposed on the surface of the second insulating film 222 on the +z-axis side. The pixel electrode 23R is disposed on the surface of the third insulating film 223 on the +z-axis side.

[0028] Fig. 4 is a plan view showing pixel electrodes 23B, 23G, and 23R in the first embodiment. The shape of each of pixel electrodes 23B, 23G, and 23R in a plan view is not particularly limited, but is substantially rectangular in the example shown in Fig. 4. The fourth insulating film 224 has an opening 245 overlapping with pixel electrode 23B in a plan view, an opening 246 overlapping with pixel electrode 23G in a plan view, and an opening 247 overlapping with pixel electrode 23R in a plan view. The openings 245, 246, and 247 are holes formed in the fourth insulating film 224, respectively.

[0029] As shown in FIG. 3, the portions of pixel electrodes 23B, 23G, and 23R except for their outer edges are exposed and in contact with functional layer 24. Therefore, the portion that substantially functions as pixel electrode 23B is the portion that overlaps with opening 245 in a plan view shown in FIG. 4. Similarly, the portion that substantially functions as pixel electrode 23G is the portion that overlaps with opening 246 in a plan view. The portion that substantially functions as pixel electrode 23R is the portion that overlaps with opening 247 in a plan view. The portions that overlap with openings 245, 246, and 247 are light-emitting portions that contribute to light emission. The portion of element unit 2 that overlaps with the light-emitting portion in a plan view is the light-emitting region that emits light.

[0030] In this embodiment, the planar areas of the pixel electrodes 23 are equal to each other, but may be different from each other. Furthermore, the widths W2 of the pixel electrodes 23 are equal to each other, but may be different from each other. Note that the widths W2 are lengths along the +y direction.

[0031] The functional layer 24 is disposed in common to the sub-pixels PB, PG, and PR. The functional layer 24 includes a light-emitting layer 240 containing an organic light-emitting material. The organic light-emitting material is a light-emitting organic compound. In addition to the light-emitting layer 240, the functional layer 24 includes, for example, a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. The functional layer 24 includes the light-emitting layer 240 from which blue, green, and red light are emitted, thereby realizing white light emission. The configuration of the functional layer 24 is not particularly limited to the above-mentioned configuration, and any known configuration can be applied.

[0032] A common electrode 25 is disposed on the functional layer 24. In other words, the common electrode 25 is disposed between the plurality of pixel electrodes 23 and a lens layer 61 described below. The common electrode 25 is disposed in common to the sub-pixels PB, PG, and PR. The common electrode 25 has light reflectivity and light transmissivity. Examples of materials constituting the common electrode 25 include various metals such as alloys containing Ag, such as MgAg.

[0033] The common electrode 25 resonates the light generated in the light-emitting layer 240 with the reflective layer 21. By providing the common electrode 25 and the reflective layer 21, an optical resonance structure capable of extracting light of a desired resonance wavelength for each of the sub-pixels PB, PG, and PR is formed. By forming the optical resonance structure, light emission with enhanced luminance can be obtained at the resonance wavelength corresponding to each emission color. The resonance wavelength is determined by the optical distance L0 described above. If the peak wavelength of the spectrum of light in a predetermined wavelength range is λ0, the following relational expression [1] is established. Φ (radian) represents the sum of the phase shifts occurring during transmission and reflection between the reflective portion 210 and the common electrode 25. {(2×L0) / λ0+Φ} / (2π)=m0 (m0 is an integer) [1]

[0034] The optical distance L0 is set so that the peak wavelength of light in the desired wavelength range is λ0. By adjusting the optical distance L0 according to the light in the desired wavelength range, the light in the specified wavelength range is amplified, and the intensity of the light can be increased and the spectrum of the light can be narrowed.

[0035] In this embodiment, as described above, the optical distance L0 is adjusted by varying the thickness of the insulating layer 22 for each of the sub-pixels PB, PG, and PR. However, for example, the optical distance L0 may be adjusted by varying the thickness of the pixel electrode 23 for each of the sub-pixels PB, PG, and PR. The thickness of the insulating layer 22 is set in consideration of the refractive index of the constituent material of each layer that constitutes the insulating layer 22.

[0036] A light-transmitting protective layer 4 is formed on the common electrode 25. The protective layer 4 protects the organic EL elements 20 and the like. The protective layer 4 may protect each organic EL element 20 from external moisture, oxygen, and the like. That is, the protective layer 4 has gas barrier properties. Therefore, the reliability of the display device 100 can be improved compared to a display device not provided with the protective layer 4. The protective layer 4 includes a first layer 41, a second layer 42, and a third layer 43. The first layer 41, the second layer 42, and the third layer 43 are stacked in this order from the common electrode 25 in the +z direction.

[0037] Examples of materials constituting the first layer 41 and the third layer 43 include nitrogen-containing inorganic silicon materials such as silicon oxynitride and silicon nitride. When the first layer 41 is mainly made of a nitrogen-containing inorganic silicon material, the gas barrier properties of the first layer 41 can be improved compared to when the first layer 41 is mainly made of silicon oxide. The same applies to the third layer 43.

[0038] The second layer 42 may be made of a resin material such as epoxy resin. The unevenness of the surface of the +z-axis side of the first layer 41 is affected by the unevenness of the surface of the +z-axis side of the common electrode 25. Therefore, by providing the second layer 42 made of a resin material, the unevenness of the surface of the +z-axis side of the first layer 41 can be suitably alleviated. Therefore, the surface of the +z-axis side of the protective layer 4 can be made flat. The second layer 42 may be made of an inorganic material such as silicon oxide such as silicon dioxide and aluminum oxide. By having the second layer 42 made of the inorganic material, even if defects such as pinholes occur in the first layer 41 during manufacturing, the defects can be complemented. Therefore, it is possible to particularly effectively suppress moisture in the air from being transmitted to the functional layer 24 through defects such as pinholes that may occur in the first layer 41.

[0039] The first layer 41, the second layer 42, and the third layer 43 may contain materials other than the above-mentioned constituent materials to the extent that the functions of each layer are not impaired. The protective layer 4 is not limited to a configuration including the first layer 41, the second layer 42, and the third layer 43, and may further include layers other than these. Any two or more of the first layer 41, the second layer 42, and the third layer 43 may be omitted.

[0040] A color filter 5 is disposed on the protective layer 4. The color filter 5 is disposed between the pixel electrode 23 and the lens layer 61. The color filter 5 selectively transmits light in a predetermined wavelength region. By providing the color filter 5, it is possible to increase the color purity of the light emitted from the display device 100 compared to a case in which the color filter 5 is not provided. The color filter 5 is made of a resin material, such as an acrylic photosensitive resin material containing a coloring material. The predetermined wavelength region through which light is selectively transmitted includes a peak wavelength λ0 determined by the optical distance L0.

[0041] The color filter 5 has a colored portion 51B that transmits light in the blue wavelength region, a colored portion 51G that transmits light in the green wavelength region, and a colored portion 51R that transmits light in the red wavelength region. The colored portion 51B blocks light in the green wavelength region and light in the red wavelength region, the colored portion 51G blocks light in the blue wavelength region and light in the red wavelength region, and the colored portion 51R blocks light in the blue wavelength region and light in the green wavelength region.

[0042] FIG. 5 is a plan view showing a part of the color filter 5 in the first embodiment. The shape of the colored portion 51 in plan view is not particularly limited, but is a rectangle in the example shown in FIG. 5. In this embodiment, one colored portion 51 is arranged corresponding to one pixel electrode 23. That is, the colored portion 51 and the pixel electrode 23 are arranged in a one-to-one relationship. Also, each colored portion 51 is arranged shifted from the corresponding pixel electrode 23 in plan view. The colored portion 51 shown in FIG. 5 overlaps with a part of the corresponding pixel electrode 23 in plan view. Also, in plan view, the center O5 of the colored portion 51 does not overlap with the center O2 of the pixel electrode 23. As will be described later in detail, the center O5 is located closer to the outer edge of the display area A10 than the center O2. Also, the planar area of ​​the colored portion 51 is larger than the planar area of ​​the pixel electrode 23, but may be smaller than the planar area of ​​the pixel electrode 23. The colored portion 51 overlaps with a part of the light-emitting area of ​​the pixel electrode 23 in plan view. In other words, the colored portion 51 overlaps with a part of any of the openings 245, 246, and 247 in a plan view. The plane area of ​​the colored portion 51 is larger than the plane area of ​​the light-emitting portion of the pixel electrode 23. A part of the colored portion 51 may be disposed between the pixel electrode 23 and the lens layer 61.

[0043] The planar areas of the colored portions 51 are equal to each other, but may be different from each other. The widths W5 of the colored portions 51 are equal to each other, but may be different from each other. The widths W5 are the length along the +y direction.

[0044] As shown in FIG. 3, a light-transmitting lens layer 61 is disposed on the color filter 5. The lens layer 61 has a plurality of lenses 610. One lens 610 is provided for one sub-pixel P0. The lenses 610 protrude from the color filter 5 toward the light-transmitting substrate 9. The lenses 610 are microlenses having a lens surface 611. The lens surface 611 is a convex surface. The lenses 610 may be so-called spherical lenses or so-called aspherical lenses.

[0045] The heights T6 of the lenses 610 are equal to each other, but may be different from each other. Note that the height T6 is the maximum length along the +z direction.

[0046] Fig. 6 is a plan view showing a part of the lens layer 61 in the first embodiment. The shape of the lenses 610 in a plan view is not particularly limited, but is a rectangle with rounded corners in the example shown in Fig. 6. The outer edges of two adjacent lenses 610 in a plan view are connected to each other.

[0047] One lens 610 is disposed corresponding to one pixel electrode 23. That is, the lens 610 and the pixel electrode 23 are disposed in a one-to-one relationship. Also, each lens 610 is disposed shifted with respect to the corresponding pixel electrode 23 in a planar view. The lens 610 overlaps a part of the corresponding pixel electrode 23 in a planar view. Also, in a planar view, the center O6 of the lens 610 does not overlap the center O2 of the pixel electrode 23. As will be described later in detail, the center O6 is located closer to the outer edge of the display area A10 than the center O2 in a planar view. One lens 610 is disposed corresponding to one light-emitting area. The lens 610 overlaps with the light-emitting area in a planar view. In other words, the lens 610 overlaps with any one of the openings 245, 246, and 247 in a planar view.

[0048] 3, the lenses 610 preferably overlap the corresponding colored portions 51 and pixel electrodes 23 in a plan view. The lens 610 may only partially overlap the colored portions 51. The lens 610 may only partially overlap the pixel electrode 23. The pixel electrode 23, colored portion 51, and lens 610 provided in the subpixel are preferably arranged in a line in this order. A part of the pixel electrode 23, a part of the colored portion 51, and a part of the lens 610 provided in the subpixel are positioned on a straight line.

[0049] The planar area of ​​the lens 610 is larger than the planar area of ​​the pixel electrode 23, but may be equal to or smaller than the planar area of ​​the pixel electrode 23. The planar area of ​​the lens 610 is larger than the planar area of ​​the light-emitting portion of the pixel electrode 23. The planar areas of the lenses 610 are equal to each other, but may be different from each other. The widths W6 of the lenses 610 are equal to each other, but may be different from each other. The widths W6 are the length along the +y direction.

[0050] As shown in FIG. 6, one lens 610 is disposed corresponding to one colored portion 51. Moreover, the lens 610 overlaps with the corresponding colored portion 51 in a planar view. In this embodiment, the center O6 of the lens 610 overlaps with the center O5 of the colored portion 51 in a planar view. Note that, in this embodiment, the entire lens 610 overlaps with the colored portion 51, but only a part of the lens 610 may overlap with the colored portion 51. Furthermore, in this embodiment, the plane area of ​​the lens 610 is equal to the plane area of ​​the colored portion 51, but may be larger or smaller than the plane area of ​​the colored portion 51.

[0051] Examples of the material of the lens 610 include a material having light transmitting properties and insulating properties. Specifically, examples of the material of the lens 610 include a silicon-based inorganic material such as silicon oxide, and a resin material such as an acrylic resin.

[0052] The refractive index of the material of the lens 610 is lower than the refractive index of the material of the later-described light-transmitting layer 62. Specifically, the refractive index of the material of the lens 610 is, for example, 1.3 or more and 1.6 or less with respect to visible light with a wavelength of 550 nm.

[0053] 3, a light-transmitting layer 62 having light-transmitting and insulating properties is disposed on the lens layer 61. The light-transmitting layer 62 is in contact with a plurality of lens surfaces 611. In addition, the surface of the light-transmitting layer 62 in contact with the light-transmitting substrate 9 is flat.

[0054] The light-transmitting layer 62 may be made of a material having light-transmitting and insulating properties. Specifically, the light-transmitting layer 62 may be made of a resin material such as epoxy resin. By using a resin material and forming the light-transmitting layer 62 so as to coat the lens surfaces 611, it is easy to flatten the surface of the light-transmitting layer 62 on the +z-axis side. The light-transmitting layer 62 may be made of an inorganic silicon material such as aluminum oxide or silicon oxynitride.

[0055] The refractive index of the material of the light-transmitting layer 62 is higher than the refractive index of the material of the lens 610. The refractive index of the material of the light-transmitting layer 62 is, for example, 1.5 or more and 1.8 or less with respect to visible light with a wavelength of 550 nm.

[0056] As described above, the lens surface 611 is a convex surface, but the refractive index of the material of the lens 610 is lower than the refractive index of the material of the light-transmitting layer 62. Therefore, the lens 610 functions as a general concave lens. That is, the lens 610 spreads the light emitted from the corresponding organic EL element 20. The spread of light will be described in detail later.

[0057] A light-transmitting substrate 9 having light-transmitting properties is disposed on the light-transmitting layer 62. When the light-transmitting layer 62 has adhesive properties, the light-transmitting substrate 9 is bonded to the element substrate 1 by the light-transmitting layer 62. When the light-transmitting layer 62 does not have adhesive properties, a member having adhesive properties may be disposed between the light-transmitting layer 62 and the light-transmitting substrate 9.

[0058] In this embodiment, the refractive index of the material of the light-transmitting substrate 9 is lower than the refractive index of the material of the light-transmitting layer 62. The light-transmitting substrate 9 is formed of, for example, a glass substrate or a quartz substrate. The refractive index of the material of the light-transmitting substrate 9 is not particularly limited, but is, for example, 1.4 or more and 1.6 or less for visible light with a wavelength of 550 nm. The refractive index of the material of the light-transmitting substrate 9 may be higher than or equal to the refractive index of the material of the light-transmitting layer 62.

[0059] Fig. 7 is a diagram for explaining the arrangement of the pixel electrode 23, the lens 610, and the colored portion 51 in the first embodiment. As shown in Fig. 7, the arrangement relationship of the lens 610 and the colored portion 51 with respect to the pixel electrode 23 in a planar view varies depending on the location in the display region A10. Note that in Fig. 7, the pixel electrode 23, the lens 610, and the colored portion 51 are exaggerated to make it easier to understand the arrangement relationship.

[0060] In FIG. 7, the display center O1 is located at the center of the display area A10 in plan view. In FIG. 7, the pixel electrode 23 that overlaps with the display center O1 in plan view is the "reference pixel electrode 23z", and the lens 610 corresponding to the reference pixel electrode 23z is the "reference lens 610z". The colored portion 51 that overlaps with the reference pixel electrode 23z in plan view is the "reference colored portion 51z". In addition, the pixel electrode 23 located outside the display center O1 in plan view is the "first pixel electrode 23x", and the lens 610 corresponding to the first pixel electrode 23x is the "first lens 610x". The colored portion 51 that overlaps with the first pixel electrode 23x in plan view is the "first colored portion 51x". In addition, the pixel electrode 23 located outside the first pixel electrode 23x in plan view is the "second pixel electrode 23y", and the lens 610 corresponding to the second pixel electrode 23y is the "second lens 610y". The colored portion 51 overlapping the second pixel electrode 23y in a plan view is defined as the “second colored portion 51y.” If there is no pixel electrode 23 overlapping with the display center O1, the pixel electrode 23 closest to the display center O1 is defined as the “reference pixel electrode 23z.”

[0061] As shown in FIG. 7, the lenses 610 other than the reference lens 610z are located outside the display area A10 in a plan view relative to the corresponding pixel electrodes 23. Specifically, for example, the first lens 610x is located outside the first pixel electrode 23x in a plan view. Therefore, in a plan view, the distance D2x between the center O2 of the first pixel electrode 23x and the display center O1 is shorter than the distance D6x between the center O6 of the first lens 610x and the display center O1. Similarly, the second lens 610y is located outside the second pixel electrode 23y in a plan view. Therefore, in a plan view, the distance D2y between the center O2 of the second pixel electrode 23y and the display center O1 is shorter than the distance D6y between the center O6 of the second lens 610y and the display center O1.

[0062] In addition, in a plan view, a distance Dx between the center O2 of the first pixel electrode 23x and the center O6 of the first lens 610x is shorter than a distance Dy between the center O2 of the second pixel electrode 23y and the center O6 of the second lens 610y. In addition, in this embodiment, in a plan view, the lens 610 is shifted outward with respect to the pixel electrode 23 as it moves outward from the display center O1. Therefore, the distance between the center O2 of the pixel electrode 23 and the center O6 of the lens 610 in a plan view increases as it moves outward from the display center O1.

[0063] Similarly, in a plan view, a distance dx between the center O2 of the first pixel electrode 23x and the center O5 of the first coloring portion 51x is shorter than a distance dy between the center O2 of the second pixel electrode 23y and the center O6 of the second lens 610y. In addition, in this embodiment, in a plan view, the coloring portion 51 is shifted outward with respect to the pixel electrode 23 as it moves outward from the display center O1. Therefore, the distance between the center O2 of the pixel electrode 23 and the center O5 of the coloring portion 51 in a plan view increases as it moves outward from the display center O1.

[0064] Next, the optical path of the light emitted from the organic EL element 20 will be described. FIG. 8 is a diagram for explaining the optical path in the first embodiment. FIG. 8 shows the vicinity of the display center O1 in a schematic manner. As shown in FIG. 8, the light emitted from the organic EL element 20 is emitted at a radiation angle θ when it leaves the light-transmitting substrate 9 to the outside. FIG. 8 shows a light flux LL of light emitted from one point of the organic EL element 20 provided in one sub-pixel P0. The radiation angle θ is a solid angle of the light flux LL, and is the angle at which the light spreads around the principal ray A1, which is the peak of the light intensity.

[0065] As described above, the refractive index of the material of the lens 610 is lower than that of the material of the light-transmitting layer 62. Therefore, the refraction angle at the lens surface 611 is larger than the angle of incidence. Therefore, the light beam LL is refracted at the lens surface 611 and spreads outward more than the light beam LL0 indicated by the dashed line. The light beam LL0 is a light beam in the case where the lens surface 611 is not provided and the lens layer 61 is made of the same material as the light-transmitting layer 62. In this way, by having the lens 610, the radiation angle θ at the sub-pixel P0 can be widened compared to the case where the lens 610 is not provided. Furthermore, the refractive index of the external air is smaller than the refractive index of the material of the light-transmitting substrate 9. Therefore, the light beam LL of the light refracted at the lens surface 611 is refracted at the surface of the light-transmitting substrate 9 and spreads outward more than the light beam LL0. Therefore, the radiation angle θ can be widened more compared to the case where the light-transmitting substrate 9 is not provided.

[0066] FIG. 9 is a diagram for explaining the optical path in the first embodiment. In FIG. 9, the vicinity of the outer edge of the display region A10 is shown in a schematic manner. As described above, in the vicinity of the outer edge of the display region A10, the colored portion 51 corresponding to the pixel electrode 23 is located outside the pixel electrode 23. Therefore, as shown in FIG. 9, the principal ray A1 can be inclined with respect to the normal line a1 of the pixel electrode 23. That is, the inclination angle θa of the principal ray A1 becomes large. The inclination angle θa is the angle between the normal line a1 of the pixel electrode 23 and the principal ray A1. The principal ray A1 is inclined to the opposite side to the display center O1. Then, in a state in which the principal ray A1 is inclined, the lens 610 can spread the light flux LL outward beyond the light flux LL0. Furthermore, the light flux LL of the light refracted by the lens surface 611 can be spread outward beyond the light flux LL0 by refracting the light flux LL on the surface of the light-transmitting substrate 9.

[0067] As described above, the display device 100 includes the substrate 10, the lens layer 61 having the lens 610, the pixel electrode 23, and the color filter 5 having the colored portion 51. The colored portion 51 overlaps with a part of the pixel electrode 23 in a planar view. As described above, the colored portion 51 is located outward from the display center O1 relative to the pixel electrode 23 in a planar view. Therefore, as described above, the chief ray A1 can be tilted outward. This can improve the viewing angle characteristics.

[0068] Furthermore, one pixel electrode 23 and one lens 610 are provided for one sub-pixel P0. Specifically, one lens 610 is disposed corresponding to one pixel electrode 23 and overlaps a part of the corresponding pixel electrode 23 in a plan view. By providing the lens 610 for each sub-pixel P0, it is possible to widen the radiation angle θ of the light emitted from each sub-pixel P0. The lens 610 is located on the outer side of the display center O1 in a plan view than the corresponding pixel electrode 23. Therefore, in a configuration in which the principal ray A1 is inclined outward, the radiation angle θ can be widened. As a result, it is possible to further improve the viewing angle characteristics of the display device 100. In other words, it is possible to widen the range of viewing angles at which the image can be viewed without any image quality change such as color shift.

[0069] Furthermore, the lens 610 is disposed on the +z-axis side of the color filter 5. Therefore, the lens 610 tilts the chief ray A1 outward and widens the radiation angle θ of the light with high color purity that has passed through the color filter 5. Therefore, the viewing angle characteristics can be improved compared to the case where the lens 610 is disposed on the -z-axis side of the color filter 5.

[0070] In this embodiment, the lens 610 is provided in each of the sub-pixels P0. Therefore, the display device 100 has particularly excellent viewing angle characteristics. Note that the lens 610 may not be provided in some of the sub-pixels P0.

[0071] Moreover, the colored portion 51 overlaps with the lens 610 in a plan view. Therefore, the light transmitted through the color filter 5 can be efficiently incident on the lens 610. Therefore, in a configuration in which the chief ray A1 is inclined outward, the radiation angle θ can be effectively widened.

[0072] As shown in FIG. 7, the distance dx between the center O2 of the first pixel electrode 23x and the center O5 of the first coloring section 51x is shorter than the distance dy between the center O2 of the second pixel electrode 23y and the center O6 of the second coloring section 51y. Therefore, the chief ray A1 of the light emitted from the organic EL element 20 located outside the display area A10 can be tilted outward more than the chief ray A1 of the light emitted from the organic EL element 20 located inside the display area A10. Furthermore, the distance Dx between the center O2 of the first pixel electrode 23x and the center O6 of the first lens 610x is shorter than the distance Dy between the center O2 of the second pixel electrode 23y and the center O6 of the second lens 610y. Therefore, in a configuration in which the chief ray A1 is tilted outward as the light is positioned further outward, the radiation angle θ can be widened. Therefore, the viewing angle characteristics can be further improved.

[0073] Furthermore, in this embodiment, in a plan view, the colored portion 51 is shifted outward relative to the pixel electrode 23 as it moves outward from the display center O1. Similarly, in a plan view, the lens 610 is shifted outward relative to the pixel electrode 23 as it moves outward from the display center O1. Therefore, the inclination angle θa of the principal ray A1 can be increased as it moves outward from the display center O1 in a plan view. Therefore, it is possible to reduce changes in luminance and chromaticity depending on the angle at which the display device 100 is viewed.

[0074] As described above, the lens 610 has the convex lens surface 611. Therefore, as described above, the light flux LL can be expanded by the lens surface 611. Furthermore, since the lens 610 has a convex shape, it is easier to form the lens 610 than if the lens 610 had a concave shape. The method of forming the lens 610 will be described in detail later.

[0075] As described above, the lens surface 611 of the lens 610 is a convex surface, but the refractive index of the material of the lens 610 is lower than the refractive index of the material of the light-transmitting layer 62. Therefore, the light flux LL can be expanded by the lens surface 611, as shown in Figs. 8 and 9.

[0076] As described above, the lens layer 61 is disposed between the substrate 10 and the light-transmitting layer 62. By disposing the layers in this order, it is easy to form the convex lenses 610 on the color filter 5 when the layers are formed by stacking them from the substrate 10 side.

[0077] Furthermore, the lens layer 61 is in contact with the color filter 5. By having the lens layer 61 in contact with the color filter 5, the light transmitted through the color filter 5 can be made to enter the lens 610 more efficiently than when another member is disposed between the lens layer 61 and the color filter 5. Therefore, the utilization efficiency of the light transmitted through the color filter 5 can be improved.

[0078] Other members may be disposed between the color filter 5, the lens layer 61, the light-transmitting layer 62, and the light-transmitting substrate 9. However, it is preferable that these are laminated. By being laminated, the light transmitted through the color filter 5 can be efficiently incident on the lens 610, and the light transmitted through the lens 610 can be efficiently emitted to the outside.

[0079] 6, the plane area of ​​the lens 610 is preferably larger than the plane area of ​​the pixel electrode 23. With such a configuration, the light generated from the organic EL element 20 can be efficiently incident on the lens 610. Therefore, a bright display device 100 with a wide radiation angle θ can be realized.

[0080] Moreover, the display device 100 in this embodiment has an organic EL element 20. That is, the display device 100 further has a pixel electrode 23, a common electrode 25, and a light-emitting layer 240 disposed between the pixel electrode 23 and the common electrode 25. The display device 100 having the organic EL element 20 constitutes an organic EL display device. Thus, by providing the lens 610 and the light-transmitting layer 62, an organic EL display device with excellent viewing angle characteristics can be realized.

[0081] Furthermore, the display device 100 has an optical resonator structure. By providing the optical resonator structure, the intensity of light is increased and the spectrum of the light is narrowed. Therefore, by providing the display device 100 with the optical resonator structure with the lens 610, the effect of expanding the radiation angle θ by the lens surface 611 is particularly favorably exhibited, and the viewing angle characteristics are further improved.

[0082] Furthermore, as described above, when the principal ray A1 is inclined outward with respect to the normal line a1, the optical distance L0 becomes longer and the resonance condition shifts to the short wavelength side. Therefore, by changing the arrangement of the colored portion 51 and the lens 610 to the outside, it is possible to achieve a condition close to the resonance condition when the principal ray A1 is parallel to the normal line a1. Therefore, it is possible to suppress the resonance condition from shifting to the short wavelength side. As a result, it is possible to reduce color unevenness and the like.

[0083] 1B. Manufacturing method of display device 100 Fig. 10 is a flow chart of a method for manufacturing the display device 100 in the first embodiment. As shown in Fig. 10, the method for manufacturing the display device 100 includes an element substrate preparation step S11, an insulating layer formation step S12, an element portion formation step S13, a protective layer formation step S14, a color filter formation step S15, a lens layer formation step S16, and a light-transmitting layer formation step S17. By carrying out these steps in this order, the display device 100 is manufactured.

[0084] In the element substrate preparation process S11, the above-mentioned substrate 10 and reflective layer 21 are formed. In the insulating layer formation process S12, the insulating layer 22 is formed. In the element portion formation process S13, the element portion 2 is formed on the insulating layer 22. That is, a plurality of organic EL elements 20 are formed. In addition, in the protective layer formation process S14, the protective layer 4 is formed. In the color filter formation process S15, the color filter 5 is formed. The element substrate 1, the reflective layer 21, the element portion 2, the protective layer 4, and the color filter 5 are formed by known techniques.

[0085] 11, 12, 13, and 14 are diagrams for explaining the lens layer forming step S16 in the first embodiment. First, as shown in FIG. 11, a lens forming composition is deposited on a color filter 5 to form a lens material layer 61a. The lens forming composition is, for example, a silicon-based inorganic material such as silicon oxide, and a resin material such as an acrylic resin. The lens material layer 61a is formed, for example, by a CVD method. Next, a mask M1 is formed on the lens material layer 61a. The mask M1 has a plurality of pattern portions M11. Each pattern portion M11 corresponds to a position where a lens 610 is formed. The mask M1 is formed, for example, by using a positive photosensitive resist in which an exposed portion is removed by development. The plurality of pattern portions M11 are formed by patterning using a photolithography technique.

[0086] Next, the mask M1 is subjected to a heating process such as a reflow process, thereby melting the mask M1. The mask M1 becomes fluid when melted, and the surface is deformed into a curved shape due to the action of surface tension. As a result of the deformation, a plurality of convex portions M12 are formed on the lens material layer 61a, as shown in FIG. 12. One convex portion M12 is formed from one pattern portion M11. The shape of the convex portion M12 is approximately hemispherical.

[0087] Next, the convex portion M12 and the lens material layer 61a are subjected to anisotropic etching such as dry etching. As a result, the convex portion M12 is removed, and the exposed portion of the lens material layer 61a is etched with the removal of the convex portion M12. As a result, the shape of the convex portion M12 is transferred to the lens material layer 61a, and a plurality of lens convex portions 611a are formed as shown in FIG. 13. Next, the lens material layer 61a, i.e., the same material as the lens convex portion 611a, is deposited on the lens convex portion 611a by using, for example, a CVD method. As a result, a lens coating 612a is formed on the plurality of lens convex portions 611a as shown in FIG. 14. Thus, a lens layer 61 composed of a plurality of lens convex portions 611a and the lens coating 612a is formed.

[0088] As a method for processing the shape of the convex portion M12 from the mask M1, for example, a method of exposure using a grayscale mask or a method of multi-step exposure may be used. Although a mask is used in the above, the lens 610 may be formed directly from a resin material such as an acrylic resin by using a photolithography technique.

[0089] Fig. 15 is a diagram for explaining the light-transmitting layer forming step S17 in the first embodiment. As shown in Fig. 15, in the light-transmitting layer forming step S17, a light-transmitting layer 62 is formed by depositing a light-transmitting layer forming composition on a lens layer 61. The light-transmitting layer forming composition has a refractive index higher than that of the above-mentioned lens forming composition.

[0090] For example, when the light-transmitting layer forming composition is an adhesive having adhesive properties, the light-transmitting layer forming composition is deposited on the lens layer 61. Then, the light-transmitting substrate 9 is pressed onto the deposited light-transmitting layer forming composition, and the light-transmitting layer forming composition is cured. According to this method, the light-transmitting layer 62 is formed, and the light-transmitting substrate 9 is bonded to the element substrate 1. Note that, when the light-transmitting layer 62 does not have adhesive properties, an adhesive layer is provided between the light-transmitting layer 62 and the light-transmitting substrate 9 to bond them together.

[0091] According to the above method, the display device 100 can be easily and quickly formed. In addition, since the lens 610 has a convex shape, it is easy to form the lens 610 using photolithography technology or the like as described above. Therefore, the lens layer 61 can be formed easily and with high accuracy compared to the case where the lens 610 has a concave shape. In addition, even if the material constituting the lens layer 61 is an inorganic material, it is easy to form the convex lens 610 using photolithography technology or the like. In addition, since the lens layer 61 is formed on the color filter 5, it is particularly easy to align the colored portion 51 and the lens 610. Furthermore, since the color filter 5 is formed on the pixel electrode 23 via the protective layer 4 having translucency, it is possible to suitably align the pixel electrode 23 and the colored portion 51.

[0092] 2. Second embodiment Next, a second embodiment of the present invention will be described. FIG. 16 and FIG. 17 are diagrams each showing a display device 100a in the second embodiment. FIG. 16 shows the vicinity of the display center O1 in a schematic manner. FIG. 17 shows the vicinity of the outer edge of the display area A10 in a schematic manner. This embodiment differs from the first embodiment in the relationship between the refractive index of the material of the lens 610 and the refractive index of the material of the light-transmitting layer 62. Note that, for matters in the second embodiment similar to those in the first embodiment, the reference numerals used in the description of the first embodiment are used and detailed descriptions of each are omitted as appropriate.

[0093] 16 is higher than the refractive index of the material of the light-transmitting layer 62. Specifically, the refractive index of the material of the lens 610 is, for example, 1.5 or more and 1.8 or less for visible light with a wavelength of 550 nm. On the other hand, the refractive index of the material of the light-transmitting layer 62 is, for example, 1.3 or more and 1.6 or less for visible light with a wavelength of 550 nm.

[0094] The lens 610 may be made of a material having light-transmitting and insulating properties. Specifically, the lens 610 may be made of a resin material such as epoxy resin. The lens 610 may be made of an inorganic material such as aluminum oxide and silicon-based inorganic materials such as silicon oxynitride. The light-transmitting layer 62 may be made of a resin material such as silicon-based inorganic materials such as silicon oxide and acrylic resin. The light-transmitting layer 62 may be made of a resin material such as silicon oxide and resin materials such as acrylic resin. The light-transmitting layer 62 may be formed so as to coat the lens surfaces 611, and the surface of the light-transmitting layer 62 on the +z axis side may be easily flattened.

[0095] As described above, the refractive index of the material of the lens 610 is higher than the refractive index of the material of the light-transmitting layer 62. Therefore, the refraction angle at the lens surface 611 is smaller than the angle of incidence. Therefore, the light beam LL is refracted at the lens surface 611 and converges more inward than the light beam LL0 indicated by the dashed line. In addition, in this embodiment, the focal point on the light-transmitting substrate 9 side of the lens 610 is located inside the light-transmitting substrate 9. Therefore, the position PL where the light beam LL passes through the lens 610 and converges as shown in FIG. 16 is located inside the light-transmitting substrate 9. That is, the light beam LL converges inside the light-transmitting substrate 9. After that, the light beam LL spreads again inside the light-transmitting substrate 9. In addition, the light beam LL of the light refracted at the lens surface 611 spreads further outward than the light beam LL0 by refracting at the surface of the light-transmitting substrate 9.

[0096] As described above, near the outer edge of the display region A10, the colored portions 51 corresponding to the pixel electrodes 23 are located outside the pixel electrodes 23. Therefore, as shown in FIG. 17, the principal ray A1 can be inclined with respect to the normal line a1 of the pixel electrodes 23. Then, in a state in which the principal ray A1 is inclined, the lens 610 can ultimately spread the light flux LL further outward than the light flux LL0. Therefore, in this embodiment as well, the viewing angle characteristics of the display device 100 can be improved.

[0097] The focal point of the lens 610 on the light-transmitting substrate 9 side may not be inside the light-transmitting substrate 9, but may be located outside the display device 100. In that case, for example, in a virtual image display device 900 described later, the angle of view θ1 can be widened by arranging the eyepiece lens 90 at a position where the light flux LL converges and then diverges again.

[0098] 3. Third embodiment Next, a third embodiment of the present invention will be described. FIG. 18 is a diagram that shows a display device 100b in the third embodiment. FIG. 19 is a diagram for explaining a manufacturing method of the display device 100b in the third embodiment. This embodiment differs from the first embodiment in that the arrangement of the lens layer 61 and the light-transmitting layer 62 is different, and a black matrix 80 is provided. Note that, for matters in the third embodiment that are similar to those in the first embodiment, the reference numerals used in the description of the first embodiment are used, and detailed descriptions of each are omitted as appropriate.

[0099] In the display device 100b shown in FIG. 18, the light-transmitting layer 62 and the lens layer 61 are arranged in this order from the color filter 5 toward the light-transmitting substrate 9. In other words, the light-transmitting layer 62 is disposed between the substrate 10 and the lens layer 61. The lens 610 protrudes from the light-transmitting substrate 9 toward the color filter 5 side. In the present embodiment, as in the first embodiment, the refractive index of the material of the lens 610 is lower than the refractive index of the material of the light-transmitting layer 62. The lens surface 611 also widens the light flux LL due to the arrangement of the light-transmitting layer 62 and the lens layer 61 shown in FIG. 18. Therefore, in the present embodiment, as in the first embodiment, the lens 610 can widen the radiation angle θ compared to the case where the lens 610 is not provided. Therefore, the viewing angle characteristic of the display device 100 can be improved. Furthermore, the light-transmitting substrate 9 can further widen the radiation angle θ.

[0100] In addition, a so-called black matrix 80 having light blocking properties is disposed between the lenses 610. By disposing the black matrix 80, it is possible to suppress or prevent light transmitted through a colored portion 51 provided in a certain sub-pixel P0 from being incident on a lens 610 provided in a sub-pixel P0 adjacent to the certain sub-pixel P0. Note that, in order to prevent color mixing between adjacent colored portions 51, another black matrix different from the black matrix 80 may be disposed between the colored portions 51.

[0101] As shown in FIG. 19, in the manufacture of the display device 100b, the lens layer 61 is formed on the light-transmitting substrate 9. Note that, before forming the lens layer 61, a black matrix 80 is formed on the surface of the light-transmitting substrate 9. In addition, the same method as the method described in the first embodiment is used as a method for forming the lens layer 61. After forming the lens layer 61, a deposition layer 62a made of a composition for forming a light-transmitting layer is formed on the lens layer 61. Thereafter, the light-transmitting substrate 9 is moved in the direction of the arrow A9, so that the deposition layer 62a is pressed against the color filter 5. Then, in the pressed state, the deposition layer 62a is hardened. The deposition layer 62a is hardened, so that the light-transmitting layer 62 is bonded to the color filter 5. Note that, if the light-transmitting layer 62 does not have adhesiveness, an adhesive layer for bonding the light-transmitting layer 62 and the color filter 5 is provided between them.

[0102] According to this method, by forming the lens layer 61 on the surface of the light-transmitting substrate 9, it is possible to easily and highly accurately form a plurality of convex lenses 610 on the light-transmitting substrate 9 using a photolithography technique or the like. In addition, since the lens layer 61 is formed on the light-transmitting substrate 9, the influence of heat and the like on the organic EL element 20 is reduced even in the case of an organic EL element 20 having poor heat resistance.

[0103] In this embodiment, the refractive index of the material of the lens 610 is lower than that of the material of the light-transmitting layer 62, but the refractive index of the material of the lens 610 may be higher than that of the material of the light-transmitting layer 62. Even in this case, the radiation angle θ can be ultimately widened as in the second embodiment, and therefore the viewing angle characteristics of the display device 100 can be improved.

[0104] 4. Fourth embodiment Next, a fourth embodiment of the present invention will be described. Fig. 20 is a diagram showing a display device 100c in the fourth embodiment. This embodiment differs from the first embodiment in that the colored portions 51B, 51G, and 51R have different thicknesses, and that a planarization layer 7 is provided. Note that, for matters in the second embodiment that are similar to those in the first embodiment, the reference symbols used in the description of the first embodiment are used, and detailed descriptions of each are omitted as appropriate.

[0105] In the display device 100c shown in FIG. 20, the thicknesses of the colored portions 51B, 51G, and 51R are different from each other. For example, the thicknesses are adjusted so that appropriate chromaticity and the like are obtained. Here, the colored portions 51B, 51G, and 51R having different thicknesses are formed on the protective layer 4 having a flat surface, so that the surface on the +z axis side of the color filter 5 has unevenness. Therefore, it becomes difficult to form the lens layer 61 on the surface on the +z axis side of the color filter 5. Therefore, in the display device 100c in this embodiment, a planarization layer 7 having translucency is disposed on the color filter 5. In other words, the planarization layer 7 is disposed between the color filter 5 and the lens layer 61.

[0106] The surface of the planarization layer 7 on the +z-axis side is a flat surface 71. The flat surface 71 contacts the lens layer 61. The planarization layer 7 reduces unevenness of the color filter 5. Therefore, by having the planarization layer 7, the lens layer 61 can be formed without being affected by unevenness on the surface of the color filter 5 on the +z-axis side.

[0107] The planarization layer 7 is formed, for example, of an inorganic layer made of an inorganic material, an organic layer made of an organic material, or a laminate of an inorganic layer and an organic layer.

[0108] 5. Variations Each of the above-mentioned exemplary embodiments may be modified in various ways. Specific modified embodiments that may be applied to each of the above-mentioned embodiments are illustrated below. Two or more embodiments selected from the following examples may be appropriately combined as long as they are not mutually contradictory.

[0109] 5-1.First modified example In each of the above-described embodiments, the organic EL element 20 has an optical resonance structure having a different resonance length for each color, but may not have an optical resonance structure. The element section 2 may have, for example, a partition wall that separates the functional layer 24 for each organic EL element 20. The pixel electrode 23 may be optically reflective. In that case, the reflective layer 21 may be omitted. The common electrode 25 is common to the multiple organic EL elements 20, but an individual cathode may be provided for each organic EL element 20.

[0110] 5-2. Second modified example The shapes of the pixel electrode 23, the lens 610, and the color filter 5 in plan view are not limited to those in the above-described embodiments. FIG. 21 is a diagram for explaining a modified example of the pixel electrode 23 and the lens 610. The shapes of the pixel electrode 23 and the lens 610 in plan view shown in FIG. 21 may be rectangular. The length along the +x direction and the length along the +y direction may be different. FIG. 22 is a diagram for explaining a modified example of the colored portion 51 and the lens 610, and corresponds to the cross section along the line BB shown in FIG. 21. FIG. 23 is a diagram for explaining a modified example of the colored portion 51 and the lens 610, and corresponds to the cross section along the line CC shown in FIG. 21. As shown in FIG. 22 and FIG. 23, the shape of the lens 610 in plan view is appropriately set according to the shape of the light-emitting portion in plan view. Therefore, the shape of the lens 610 may correspond to the shape of the pixel electrode 23 in plan view shown in FIG. 21. The same applies to the shape of the colored portion 51. Also, as shown in FIG. 22 and FIG. 23, adjacent lenses 610 may be spaced apart from each other.

[0111] FIG. 24 is a plan view showing a modified example of the color filter 5. As shown in FIG. 24, the colored portion 51 may be arranged corresponding to a plurality of pixel electrodes 23. Specifically, the colored portion 51B overlaps with a plurality of pixel electrodes 23B corresponding to blue. The colored portion 51G overlaps with a plurality of pixel electrodes 23G corresponding to green. The colored portion 51R overlaps with a plurality of pixel electrodes 23R corresponding to red. In the example shown in FIG. 24, the colored portions 51B, 51G, and 51R are arranged in a stripe shape. Also, the colored portions 51B, 51G, and 51R may overlap each other in a planar view. In FIG. 24, the colored portion 51B has an overlapping portion 519B that overlaps with the colored portion 51G in a planar view. The colored portion 51G has an overlapping portion 519G that overlaps with the colored portion 51R in a planar view.

[0112] 25, 26, 27, and 28 are plan views showing modified examples of the pixel electrode 23, the lens 610, and the colored portion 51, respectively. In Fig. 25, 26, and 27, the pixel electrode 23, the lens 610, and the colored portion 51 in one pixel P are illustrated. In Fig. 28, the portion surrounded by a thick line corresponds to one pixel P.

[0113] As shown in Fig. 25, the shapes of the multiple pixel electrodes 23 in plan view may be different from each other. The shapes of the lenses 610 and the colored portions 51 in plan view may match the shapes of the light-emitting portions. Thus, the shapes of the lenses 610 and the colored portions 51 in plan view may correspond to the shapes of the pixel electrodes 23 in plan view. Therefore, as shown in Fig. 25, the shapes of the multiple lenses 610 in plan view may be different from each other. The shapes of the multiple colored portions 51 in plan view may be different from each other.

[0114] As shown in Fig. 26, the arrangement of the coloring portions 51B, 51G, and 51R may be a so-called rectangular arrangement. The coloring portions 51B, 51G, and 51R do not have to be aligned in the +y direction. As shown in Fig. 26, the arrangement of the pixel electrodes 23 and the lenses 610 corresponds to the arrangement of the coloring portions 51.

[0115] 27, the arrangement of the coloring portions 51B, 51G, and 51R may be a so-called Bayer arrangement. One pixel P may have a plurality of coloring portions 51 of the same color. In FIG. 27, one pixel P has two coloring portions 51B.

[0116] 28, the colored portions 51B, 51G, and 51R may be arranged in a so-called delta arrangement. The shape of one pixel P in plan view does not have to be rectangular. The shapes of the pixel electrode 23, the lens 610, and the colored portions 51 in plan view are not limited to rectangular, and may be polygonal other than rectangular, such as a hexagon, or may be circular.

[0117] 5-3.Third modified example The reference coloring portion 51z and the first pixel electrode 23x may be disposed so as to be shifted from the reference pixel electrode 23z in a plan view.

[0118] 6.Electronic equipment The display device 100 of the above-described embodiment can be applied to various electronic devices.

[0119] 6A. Virtual image display device 900 Fig. 29 is a diagram showing a schematic view of a part of the internal structure of a virtual image display device 900, which is an example of the electronic device of the present invention. The virtual image display device 900 shown in Fig. 29 is an HMD (head mounted display) that is worn on a human head and displays an image. The virtual image display device 900 includes the above-mentioned display device 100 and an eyepiece lens 90. An image displayed on the display device 100 is emitted as image light L. In Fig. 29, light entering the eye EY is shown as the image light L.

[0120] The image light L emitted from the display device 100 is magnified by the eyepiece lens 90, which is a condenser lens. The image light L magnified by the eyepiece lens 90 is then guided to the human eye EY, allowing the human to see a virtual image formed by the image light L. Note that various other lenses, light guide plates, and the like may be provided between the eyepiece lens 90 and the eye EY.

[0121] In order to obtain a large virtual image in the virtual image display device 900, it is necessary to increase the angle of view θ1. To increase the angle of view θ1, it is necessary to enlarge the eyepiece lens 90. To increase the angle of view θ1 using the display device 100 having a smaller planar area than the planar area of ​​the eyepiece lens 90, it is necessary to increase the angle a that spreads outward with respect to the normal a1 to the surface of the pixel electrode 23.

[0122] The virtual image display device 900 has the above-mentioned display device 100. According to the display device 100, the radiation angle θ can be widened for each sub-pixel P0. Therefore, compared to the conventional device, the angle a can be made larger. Therefore, even if a display device 100 whose planar area is smaller than that of the eyepiece lens 90 is used, the angle of view θ1 can be widened. Therefore, even if a display device 100 smaller than the conventional device is used, a human can observe a virtual image of the same size as when the conventional device is used. In other words, a large virtual image can be formed using a display device 100 smaller than the conventional device. By using such a display device 100, the virtual image display device 900 can be made smaller.

[0123] In addition, by widening the radiation angle θ of each sub-pixel P0, the range of light emitted from each sub-pixel P0 reaching the eye EY is widened. Therefore, the range in which the light flux LL emitted from each sub-pixel P0 overlaps is widened. Therefore, the allowable range of the position of the eye EY at which a virtual image can be seen is widened. Therefore, it is possible to suit individual differences such as a person with a narrow distance between the eyes, a person with a wide distance between the eyes, a person with a large eye EY, and a person with a small eye EY.

[0124] Examples of the "electronic device" equipped with the display device 100 include devices having an eyepiece lens, such as an electronic viewfinder and electronic binoculars, in addition to the virtual image display device 900 illustrated in Fig. 29. Examples of the "electronic device" include devices such as a personal computer, a smartphone, and a digital camera that are equipped with the display device 100 as a display unit.

[0125] Although the present invention has been described above based on the illustrated embodiments, the present invention is not limited to these. Furthermore, the configuration of each part of the present invention can be replaced with any configuration that exerts the same function as the above-mentioned embodiment, and any configuration can be added. Furthermore, the present invention may be configured to combine any configuration of each of the above-mentioned embodiments.

[0126] The "display device" is not limited to an organic EL display device, but may be an EL display device using inorganic materials, a liquid crystal display device having liquid crystal, or a device having an LED array.

[0127] The "display device" is not limited to a device that displays a full-color image, but may be a device that displays a monochrome image. For example, the "display device" may be a device that displays an image that is expressed in green, or a device that displays an image that is expressed in orange.

[0128] The portion of the pixel electrode 23 that is in contact with the functional layer 24 may be regarded as the "pixel electrode." [Explanation of symbols]

[0129] 1...element substrate, 2...element portion, 4...protective layer, 5...color filter, 7...planarization layer, 9...light-transmitting substrate, 10...substrate, 13...scanning line, 14...data line, 15...power supply line, 16...power supply line, 20...organic EL element, 21...reflective layer, 22...insulating layer, 23...pixel electrode, 23B...pixel electrode, 23G...pixel electrode, 23R...pixel electrode, 23x...first pixel electrode, 23y...second pixel electrode, 23z...reference pixel electrode, 24...functional layer, 25...common electrode, 30...pixel circuit, 31...switching transistor, 32...driving transistor register, 33...storage capacitance, 41...first layer, 42...second layer, 43...third layer, 51...colored portion, 51B...colored portion, 51G...colored portion, 51R...colored portion, 51x...first colored portion, 51y...second colored portion, 51z...reference colored portion, 61...lens layer, 61a...lens material layer, 62...light-transmitting layer, 62a...deposition layer, 71...flat surface, 80...black matrix, 90...eyepiece lens, 100...display device, 100a...display device, 100b...display device, 100c...display device, 101...data line driving circuit, 102...scanning line driving circuit, 1 03...control circuit, 104...external terminal, 210...reflection portion, 221...first insulating film, 222...second insulating film, 223...third insulating film, 224...fourth insulating film, 240...light emitting layer, 245...opening, 246...opening, 247...opening, 519B...overlapping portion, 519G...overlapping portion, 610...lens, 610x...first lens, 610y...second lens, 610z...reference lens, 611...lens surface, 611a...lens convex portion, 612a...lens coating, 900...virtual image display device, A1...principal light, A10...display area, A20...peripheral area, D2x...distance, D2y...distance, D6x...distance, D6y...distance, Dx...distance, Dy...distance, EY...eye, L...image light, L0...optical distance, LL...light flux, LL0...light flux, M1...mask, M11...pattern portion, M12...convex portion, O1...display center, O2...center, O5...center, O6...center, P...pixel, P0...subpixel, PB...subpixel, PG...subpixel, PR...subpixel, T6...height, a...angle, a1...normal, dx...distance, dy...distance, θ...radiation angle, θ1...angle of view, θa...tilt angle, W2...width, W5...width, W6...width.

Claims

1. A substrate; a lens layer including a lens; a pixel electrode disposed between the substrate and the lens layer; a color filter disposed between the pixel electrode and the lens layer; the color filter has a colored portion that overlaps a part of the pixel electrode in a plan view between the substrate and the lens layer, The pixel electrode is provided in a display area for displaying an image, the lens overlaps with a portion of the pixel electrode in the plan view, 2. The display device according to claim 1, wherein, in the plan view, a distance between a center of the pixel electrode and a display center of the display area is shorter than a distance between a center of the lens and the display center.

2. The display device according to claim 1 , wherein the lens overlaps the colored portion.

3. The lens has a lens surface, 3. The display device according to claim 1, wherein the lens surface is a convex surface.

4. a light-transmitting layer in contact with the lens surface and having light-transmitting properties; The display device according to claim 3 , wherein a refractive index of a material constituting the lens is lower than a refractive index of a material constituting the light-transmitting layer.

5. a light-transmitting layer in contact with the lens surface and having light-transmitting properties; The display device according to claim 3 , wherein a refractive index of a material constituting the lens is higher than a refractive index of a material constituting the light-transmitting layer.

6. a common electrode disposed between the pixel electrodes and the lens layer; 6. The display device according to claim 1, further comprising: a light-emitting layer that is disposed between the pixel electrode and the common electrode and contains an organic light-emitting material.

7. 7. The display device according to claim 1, wherein, in the plan view, a distance between a center of the pixel electrode and the display center is shorter than a distance between a center of the colored portion and the display center.

8. the pixel electrode is a first pixel electrode, the lens is a first lens, the colored portion is a first colored portion, a second pixel electrode disposed between the substrate and the lens layer; the color filter has a second colored portion that overlaps a part of the second pixel electrode in the plan view between the substrate and the lens layer, In the plan view, a distance between a center of the second pixel electrode and the display center is shorter than a distance between a center of the second coloring portion and the display center; the lens layer includes a second lens overlapping a portion of the second pixel electrode in the plan view, In the plan view, a distance between a center of the second pixel electrode and a center of the display area is shorter than a distance between a center of the second lens and the display center, In the plan view, a distance between the first pixel electrode and the first colored portion is shorter than a distance between the second pixel electrode and the second colored portion; 7. The display device according to claim 1, wherein in the plan view, a distance between the first pixel electrode and the first lens is shorter than a distance between the second pixel electrode and the second lens.

9. A substrate; a lens layer including a first lens and a second lens; a first pixel electrode and a second pixel electrode disposed between the substrate and the lens layer and provided in a display area for displaying an image; a color filter including a first colored portion disposed between the first pixel electrode and the lens layer, and a second colored portion disposed between the second pixel electrode and the lens layer; the first colored portion overlaps a portion of the first pixel electrode between the substrate and the lens layer in a plan view; the second colored portion overlaps a portion of the second pixel electrode between the substrate and the lens layer in the plan view, the first lens overlaps a portion of the first pixel electrode in the plan view, the second lens overlaps with a portion of the second pixel electrode in the plan view, In the plan view, a distance between a center of the second pixel electrode and a display center of the display area is shorter than a distance between a center of the second lens and the display center, The display device, characterized in that, in the plan view, a distance between the first pixel electrode and the first lens is shorter than a distance between the second pixel electrode and the second lens.

10. The display device according to claim 9 , wherein in the plan view, a distance between a center of the second pixel electrode and the display center is shorter than a distance between a center of the second colored portion and the display center.

11. 11 . The display device according to claim 9 , wherein in the plan view, a distance between the first pixel electrode and the first colored portion is shorter than a distance between the second pixel electrode and the second colored portion.

12. An electronic device comprising the display device according to claim 1 .

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