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 having a lens, a translucent layer which is in contact with a lens surface of the lens and has translucency, 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 lens is arranged so as to correspond to the pixel electrode, and the refractive index of a constituent material of the lens is lower than the refractive index of a constituent material of the translucent layer.SELECTED DRAWING: Figure 3

Description

Technical Field

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

Background Art

[0002] Display devices such as organic EL (electroluminescence) display devices using organic EL 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 region.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Regarding a display device including a color filter as in Patent Document 1, improvement in viewing angle characteristics or expansion of the emission angle is desired.

Means for Solving the Problems

[0005] One aspect of the display device of the present invention includes a common electrode having light reflectivity and translucency, a first reflective portion, a second reflective portion, and a third reflective portion that are adjacent to each other along a first direction in a plan view, a first pixel electrode having translucency and provided between the first reflective portion and the common electrode, a second pixel electrode having translucency and provided between the second reflective portion and the common electrode, a third pixel electrode having translucency and provided between the third reflective portion and the common electrode, a light-emitting layer provided between the common electrode and the first pixel electrode, between the common electrode and the second pixel electrode, and between the common electrode and the third pixel electrode, a substrate that transmits light emitted by the light-emitting layer, a first colored portion provided corresponding to the first pixel electrode between the substrate and the common electrode, a second colored portion provided corresponding to the second pixel electrode between the substrate and the common electrode, a third colored portion provided corresponding to the third pixel electrode between the substrate and the common electrode, a first lens provided between the substrate and the first colored portion, a second lens provided between the substrate and the second colored portion, a third lens provided between the substrate and the third colored portion, and a translucent layer provided in contact with the first lens, the second lens, and the third lens. In a cross-sectional view along the first direction and the normal direction of the substrate, the distance in the normal direction between the first reflective portion and the common electrode, the distance in the normal direction between the second reflective portion and the common electrode, and the distance in the normal direction between the third reflective portion and the common electrode become shorter in this order, and the thickness of the first colored portion, the thickness of the second colored portion, and the thickness of the third colored portion become thinner in this order. Furthermore, each lens surface of the first lens, the second lens, and the third lens is a convex surface protruding toward the substrate, and the refractive index of each of the first lens, the second lens, and the third lens is lower than the refractive index of the light-transmitting layer.

Brief Description of the Drawings

[0006]

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Embodiments for Carrying Out the Invention

[0007] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Note that in the drawings, the dimensions and scales of each part are appropriately different from the actual ones, and there are also parts schematically shown for easy understanding. Also, the scope of the present invention is not limited to these embodiments unless otherwise specified in the following description.

[0008] 1. First Embodiment 1A. Display Device 100 FIG. 1 is a plan view showing the display device 100 in the first embodiment. Hereinafter, for convenience of explanation, the x-axis, y-axis, and z-axis orthogonal to each other shown in FIG. 1 will be appropriately used for explanation. The element substrate 1 included in the display device 100 described later is parallel to the x-y plane. Also, "plan view" means viewing from the -z direction. The direction in which the translucent substrate 9 and the element substrate 1 overlap later is a direction parallel to the -z direction. The thickness direction of the element substrate 1 described later is a direction parallel to the -z direction. Also, in the following description, translucency means transparency to visible light, and preferably means that the transmittance of visible light is 50% or more.

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

[0010] The element substrate 1 has a display area A10 for displaying an image and a peripheral area A20 surrounding the display area A10 in a plan view. Note that the shape of the display area A10 in a plan view is a quadrangular shape, but it is not limited to this and may be other polygonal shapes. Also, the shape of the display area A10 in a plan view does not have to be a perfect quadrangle, may have rounded corners, or may be partially missing. Further, the element substrate 1 includes 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 minimum unit in image display. The pixels P are arranged in a matrix along the +x direction and the +y direction. 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 quadrangular. The sub-pixels PB, PG, and PR are arranged with the same color along the +x direction and are repeated in the order of blue, green, and red along the +y direction. Note that when the sub-pixels PB, PG, and PR are not distinguished, they are denoted as sub-pixel P0. The sub-pixel P0 is an element that constitutes the pixel P. The sub-pixel P0 is an example of a unit circuit that is the minimum unit of the image to be displayed, and one pixel of a color image is represented by the sub-pixels PB, PG, and PR. The sub-pixel P0 is controlled independently of other sub-pixels P0.

[0012] In the peripheral region A20 of the element substrate 1, 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. The data line driving circuit 101 and the scanning line driving circuit 102 are peripheral circuits that control the driving of each part constituting a plurality of sub-pixels P0. The control circuit 103 controls the display of an image. Image data and the like are supplied to the control circuit 103 from an upper 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. An FPC (Flexible Printed Circuits) substrate or the like for making an electrical connection with an upper circuit (not shown) is connected to the external terminal 104. Further, 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, a scanning line 13 and a data line 14 are provided on the element substrate 1. The scanning line 13 extends along the +y direction. The data line 14 extends along the +x direction. Note that there are a plurality of the scanning lines 13 and the data lines 14. 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. Sub-pixels P0 are provided corresponding to each intersection of the plurality of scanning lines 13 and the plurality of data lines 14.

[0014] Each sub-pixel P0 includes an organic EL element 20 and a pixel circuit 30 that controls the 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 such an organic EL element 20, holes supplied from the pixel electrode 23 and electrons supplied from the common electrode 25 recombine in the functional layer 24, causing the functional layer 24 to generate light. Note that a power supply line 16 is electrically connected to the common electrode 25. A lower power supply potential Vct is supplied to the power supply line 16 from a power supply circuit (not shown). Here, the pixel electrode 23 is provided for each sub-pixel P0. The pixel electrode 23 can be set to be different from other pixel electrodes 23 independently. More specifically, the pixel electrode 23 may be set to pass different currents, or different voltages may be set for the pixel electrode 23.

[0015] The pixel circuit 30 has a switching transistor 31, a driving transistor 32, and a holding capacitor 33. The gate of the switching transistor 31 is electrically connected to the scanning line 13. Also, 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. Also, one of the source or drain of the driving transistor 32 is electrically connected to the power supply line 15, and the other is electrically connected to the pixel electrode 23. Note that a higher power supply potential Vel is supplied to the power supply line 15 from a power supply circuit (not shown). Also, one electrode of the holding 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 the scanning signal to select the 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, that is, the potential difference between the gate and the source, to the organic EL element 20. And the organic EL element 20 emits light with a luminance corresponding to the magnitude of the current supplied from the driving transistor 32. Also, when the scanning line driving circuit 102 releases 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 capacitor 33. Therefore, the organic EL element 20 can emit light even after the switching transistor 31 is turned off.

[0017] Note that the configuration of the pixel circuit 30 described above is not limited to the illustrated configuration. For example, the pixel circuit 30 may further include a transistor that controls the 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 taken along line A-A of the display device 100 in FIG. 1.

[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 has 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 the plurality of organic EL elements 20 described above. The color filter 5 has a plurality of colored portions 51. The lens layer 61 has a plurality of lenses 610. Also, 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-transmissive substrate 9.

[0020] One sub-pixel P0 is provided with one reflecting portion 210, one pixel electrode 23, one coloring portion 51, and one lens 610. Hereinafter, the pixel electrode 23 provided in the sub-pixel PB is referred to as "pixel electrode 23B", the pixel electrode 23 provided in the sub-pixel PG is referred to as "pixel electrode 23G", and the pixel electrode 23 provided in the sub-pixel PR is referred to as "pixel electrode 23R". When these pixel electrodes 23B, 23G, and 23R are not distinguished, they are denoted as pixel electrode 23. Similarly, the coloring portion 51 provided in the sub-pixel PB is referred to as "coloring portion 51B", the coloring portion 51 provided in the sub-pixel PG is referred to as "coloring portion 51G", and the coloring portion 51 provided in the sub-pixel PR is referred to as "coloring portion 51R". When these coloring portions 51B, 51G, and 51R are not distinguished, they are denoted as coloring portion 51. Hereinafter, each part of the display device 100 will be sequentially described.

[0021] The substrate 10 is a wiring substrate on which the aforementioned pixel circuit 30 is formed on a base material made of, for example, 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 translucency. Further, the switching transistor 31 and the driving transistor 32 included in the pixel circuit 30 may each be a MOS type transistor having an active layer. For example, the active layer may be made of a silicon substrate. The switching transistor 31 and the driving transistor 32 included in the pixel circuit 30 may be thin film transistors or field effect transistors. Examples of the constituent materials of each part constituting the pixel circuit 30 and various wirings include conductive materials such as polysilicon, metal, metal silicide, and metal compound.

[0022] On the substrate 10, a reflective layer 21 having light reflectivity is provided. The plurality of reflective portions 210 of the reflective layer 21 are arranged in a matrix, for example, in a plan view. One 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 manner. Further, each reflective portion 210 overlaps the pixel electrode 23 in a plan view. Each such reflective portion 210 reflects the light generated in the light-emitting layer 240 of the functional layer 24. Therefore, each reflective portion 210 has light reflectivity.

[0023] Examples of the constituent material of the reflective layer 21 include metals such as Al (aluminum) and Ag (silver), or alloys of these metals. Note that the reflective layer 21 may have a function as a wiring electrically connected to the pixel circuit 30.

[0024] An insulating layer 22 having insulating properties is disposed on the reflective layer 21. The insulating layer 22 includes 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 so as to cover the reflective layer 21. The first insulating film 221 is commonly formed across the sub-pixels PB, PG, and PR. The first insulating film 221 overlaps the pixel electrodes 23B, 23G, and 23R in a plan view. The second insulating film 222 is disposed on the first insulating film 221. The second insulating film 222 overlaps the pixel electrode 23R in a plan view and does not overlap the pixel electrodes 23B and 23G in a plan view. The third insulating film 223 is disposed so as to cover the second insulating film 222. The third insulating film 223 overlaps the pixel electrodes 23R and 23G in a plan view and does not overlap the pixel electrode 23B in a plan 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 reflecting portion 210 and the common electrode 25 described later. The optical distance L0 varies for each emission 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 the present embodiment, since the thickness of the insulating layer 22 is different among the sub-pixels PB, PG, and PR, the optical distance L0 is different for each emission color.

[0026] Examples of the constituent materials of the layers constituting the insulating layer 22 include silicon-based inorganic materials such as silicon oxide and silicon nitride. Note that 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 the lens layer 61 described later. Further, the pixel electrode 23 has translucency. Examples of the constituent material of the pixel electrode 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. Further, the pixel electrode 23B is disposed on the +z-axis side surface of the first insulating film 221. The pixel electrodes 23G and 23R are respectively disposed on the +z-axis side surfaces of the third insulating film 223.

[0028] FIG. 4 is a plan view showing the pixel electrodes 23B, 23G, and 23R in the first embodiment. The shapes of the pixel electrodes 23B, 23G, and 23R in each plan view are not particularly limited, but in the example shown in FIG. 4, they are substantially rectangular. The fourth insulating film 224 has an opening 245 that overlaps the pixel electrode 23B in plan view, an opening 246 that overlaps the pixel electrode 23G in plan view, and an opening 247 that overlaps the pixel electrode 23R in 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 excluding the outer edges of the pixel electrodes 23B, 23G, and 23R are exposed and in contact with the functional layer 24. Therefore, the portion that substantially functions as the pixel electrode 23B is the portion that overlaps the opening 245 in the plan view shown in FIG. 4. Similarly, the portion that substantially functions as the pixel electrode 23G is the portion that overlaps the opening 246 in the plan view. The portion that substantially functions as the pixel electrode 23R is the portion that overlaps the opening 247 in the plan view. The portions overlapping these openings 245, 246, and 247 are the light-emitting portions that contribute to light emission. The portion of the element portion 2 that overlaps the light-emitting portion in the plan view is the light-emitting region that emits light.

[0030] In this embodiment, the planar areas of the plurality of pixel electrodes 23 are equal to each other. Also, the widths W2 of the plurality of pixel electrodes 23 are equal to each other. The width W2 is the length along the +y direction. Note that the planar areas of the plurality of pixel electrodes 23 may be different from each other. The widths W2 of the plurality of pixel electrodes 23 may be different from each other.

[0031] The functional layer 24 is disposed in common for 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. Also, 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 a light-emitting layer 240 that can obtain each of the light-emitting colors of blue, green, and red to realize white light emission. Note that the configuration of the functional layer 24 is not particularly limited to the above-described configuration, and a 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 later. The common electrode 25 is disposed in common for the sub-pixels PB, PG, and PR. The common electrode 25 has light reflectivity and translucency. Examples of the constituent material of the common electrode 25 include various metals such as alloys containing Ag such as MgAg.

[0033] The common electrode 25 causes the light generated in the light-emitting layer 240 to resonate with the reflective layer 21. By providing the common electrode 25 and the reflective layer 21, an optical resonance structure is formed that can extract light of a desired resonance wavelength for each of the sub-pixels PB, PG, and PR. When this optical resonance structure is formed, light emission with enhanced luminance can be obtained at the resonance wavelength corresponding to each emission color. The resonance wavelength is determined by the aforementioned optical distance L0. Assuming that the peak wavelength of the spectrum of light in a predetermined wavelength region is λ0, the following relational expression [1] holds. Φ (radians) represents the total phase shift that occurs 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 the light in the wavelength region to be extracted becomes λ0. By adjusting the optical distance L0 according to the light in the wavelength region to be extracted, the light in a predetermined wavelength region can be enhanced, 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. Also, the thickness of the insulating layer 22 is set in view of the refractive index of the constituent materials of the layers constituting the insulating layer 22.

[0036] A protective layer 4 having translucency is formed on the common electrode 25. The protective layer 4 protects the organic EL element 20 and the like. The protective layer 4 may protect each organic EL element 20 from external moisture, oxygen, etc. That is, the protective layer 4 has gas barrier properties. Therefore, the reliability of the display device 100 can be improved compared to the case where the protective layer 4 is not provided. 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 laminated in the +z direction in this order from the common electrode 25.

[0037] As the constituent materials of the first layer 41 and the third layer 43, for example, silicon-based inorganic materials containing nitrogen such as silicon oxynitride and silicon nitride can be mentioned respectively. By making the first layer 41 mainly composed of a silicon-based inorganic material containing nitrogen, the gas barrier property of the first layer 41 can be increased as compared with the case where the first layer 41 is mainly composed of silicon oxide. The same applies to the third layer 43.

[0038] As the constituent material of the second layer 42, for example, resin materials such as epoxy resin can be mentioned. The unevenness on the +z-axis side surface of the first layer 41 is affected by the unevenness on the +z-axis side surface of the common electrode 25. Therefore, by providing the second layer 42 composed of a resin material, the unevenness on the +z-axis side surface of the first layer 41 can be preferably alleviated. Thus, the +z-axis side surface of the protective layer 4 can be made flat. Further, the constituent material of the second layer 42 may be, for example, an inorganic material such as silicon oxide such as silicon dioxide and aluminum oxide. By having the second layer 42 composed 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 the transmission of moisture in the atmosphere and the like to the functional layer 24 through the defects such as pinholes that may occur in the first layer 41.

[0039] Note that the first layer 41, the second layer 42, and the third layer 43 may contain other materials other than the above-mentioned constituent materials to such an extent that the functions of each layer are not deteriorated. Further, the protective layer 4 is not limited to the configuration including the first layer 41, the second layer 42, and the third layer 43, and may further include other layers. Further, 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. In other words, 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 range. By providing the color filter 5, the color purity of the light emitted from the display device 100 can be increased as compared with the case where 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, for example. The predetermined wavelength range that selectively transmits light 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 range, a colored portion 51G that transmits light in the green wavelength range, and a colored portion 51R that transmits light in the red wavelength range. Further, the colored portion 51B blocks light in the green wavelength range and the red wavelength range, the colored portion 51G blocks light in the blue wavelength range and the red wavelength range, and the colored portion 51R blocks light in the blue wavelength range and the green wavelength range.

[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 in the example shown in FIG. 5, it is a quadrilateral. 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 one-to-one. Further, the colored portion 51 overlaps the corresponding pixel electrode 23 in plan view. In the present embodiment, the colored portion 51 overlaps all of the pixel electrodes 23 in plan view, but may overlap a part of the pixel electrodes 23 in plan view. Also, the planar area of the colored portion 51 may be equal to or less than the planar area of the pixel electrode 23. Further, the planar areas of the plurality of colored portions 51 are equal to each other. Also, the widths W5 of the plurality of colored portions 51 are equal to each other. The width W5 is the length along the +y direction. Note that the planar areas of the plurality of colored portions 51 may be different from each other. The widths W5 of the plurality of colored portions 51 may be different from each other. The colored portion 51 overlaps the light-emitting region in plan view. In other words, the colored portion 51 overlaps any one of the openings 245, 246, and 247 in plan view. Also, the planar area of the colored portion 51 is larger than the planar area of the light-emitting portion of the pixel electrode 23. A part of the colored portion 51 may be arranged between the pixel electrode 23 and the lens layer 61.

[0043] As shown in FIG. 3, a lens layer 61 having translucency is arranged 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 lens 610 protrudes from the color filter 5 toward the translucent substrate 9. The lens 610 is a microlens having a lens surface 611. The lens surface 611 is a convex surface. Note that the lens 610 may be a so-called spherical lens or a so-called aspherical lens.

[0044] Also, the heights T6 of the plurality of lenses 610 are equal to each other. The height T6 is the maximum length along the +z direction. Note that the heights T6 of the plurality of lenses 610 may be different from each other.

[0045] FIG. 6 is a plan view showing a part of the lens layer 61 in the first embodiment. The shape of the lens 610 in plan view is not particularly limited, but in the example shown in FIG. 6, it is a rounded rectangle. The outer edges of two adjacent lenses 610 in plan view are connected to each other. Also, one lens 610 is arranged corresponding to one pixel electrode 23. That is, the lenses 610 and the pixel electrodes 23 are arranged one-to-one. Further, the lens 610 overlaps the pixel electrode 23 in plan view. The planar area of the lens 610 is substantially equal to the planar area of the pixel electrode 23. However, the planar area of the lens 610 is larger than the planar area of the light-emitting portion of the pixel electrode 23. Also, the widths W6 of the plurality of lenses 610 are substantially equal. The width W6 is the length along the +y direction. One lens 610 is arranged corresponding to the light-emitting region. The lens 610 overlaps the light-emitting region in plan view. In other words, the lens 610 overlaps with any one of the openings 245, 246, and 247 in plan view.

[0046] As shown in FIG. 3, it is preferable that the lens 610 overlaps with the corresponding colored portion 51 and the pixel electrode 23 in plan view. The overlap between the lens 610 and the colored portion 51 may be partial. Also, the overlap between the lens 610 and the pixel electrode 23 may be partial. The pixel electrode 23, the colored portion 51, and the lens 610 provided in the sub-pixel are preferably arranged in a row in this order. Preferably, the pixel electrode 23, the colored portion 51, and the lens 610 provided in the sub-pixel are arranged in a straight line.

[0047] In this embodiment, the lens 610 overlaps with substantially all of the pixel electrode 23 in plan view, but may overlap with a part of the pixel electrode 23 in plan view. Also, the planar area of the lens 610 may be larger than the planar area of the pixel electrode 23, or may be smaller than the planar area of the pixel electrode 23. Also, the widths W6 of the plurality of lenses 610 may be different from each other.

[0048] Examples of the constituent material of the lens 610 include materials having translucency and insulation. Specifically, examples of the constituent material of the lens 610 include silicon-based inorganic materials such as silicon oxide, and resin materials such as acrylic resin.

[0049] The refractive index of the constituent material of the lens 610 is lower than that of the constituent material of the light-transmitting layer 62 described later. Specifically, the refractive index of the constituent 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.

[0050] As shown in FIG. 3, a light-transmitting layer 62 having light-transmitting properties 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. Further, the surface of the light-transmitting layer 62 in contact with the light-transmitting substrate 9 is flat.

[0051] Examples of the constituent material of the light-transmitting layer 62 include materials having light-transmitting properties and insulating properties. Specifically, examples of the constituent material of the light-transmitting layer 62 include resin materials such as epoxy resins. By using a resin material, it is easy to make the surface on the +z-axis side of the light-transmitting layer 62 flat by forming the light-transmitting layer 62 so as to coat a plurality of lens surfaces 611. Further, the constituent material of the light-transmitting layer 62 may be a silicon-based inorganic material such as aluminum oxide and silicon oxynitride.

[0052] The refractive index of the constituent material of the light-transmitting layer 62 is higher than that of the constituent material of the lens 610. The refractive index of the constituent 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. Further, since the refractive index of the constituent material of the lens 610 is lower than that of the constituent material of the light-transmitting layer 62, although the lens surface 611 is a convex surface, 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.

[0053] A light-transmitting substrate 9 having light-transmitting properties is disposed on the light-transmitting layer 62. When the light-transmitting layer 62 has adhesiveness, 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 adhesiveness, a member having adhesiveness may be disposed between the light-transmitting layer 62 and the light-transmitting substrate 9.

[0054] In this embodiment, the refractive index of the constituent material of the translucent substrate 9 is lower than that of the constituent material of the translucent layer 62. The translucent substrate 9 is composed of, for example, a glass substrate or a quartz substrate. The refractive index of the constituent material of the translucent substrate 9 is not particularly limited, but is, for example, 1.4 or more and 1.6 or less with respect to visible light having a wavelength of 550 nm. Note that the refractive index of the constituent material of the translucent substrate 9 may be higher than or equal to the refractive index of the constituent material of the translucent layer 62.

[0055] The configuration of the display device 100 has been described above. Next, the optical path of the light emitted from the organic EL element 20 will be described.

[0056] FIG. 7 is a diagram for explaining the optical path in the first embodiment. As shown in FIG. 7, the light emitted from the organic EL element 20 is emitted at an emission angle θ when exiting from the translucent substrate 9 to the outside. FIG. 7 shows a light beam LL of light emitted from one point of the organic EL element 20 provided in one sub-pixel P0. The emission angle θ is a solid angle in the light beam LL and is an angle at which the light spreads around the principal ray A1 which is the peak of the light intensity.

[0057] As described above, the refractive index of the constituent material of the lens 610 is lower than that of the constituent material of the translucent layer 62. Therefore, the refraction angle at the lens surface 611 becomes larger than the incident angle. Therefore, the light beam LL spreads outward beyond the light beam LL0 indicated by the broken line by refracting at the lens surface 611. Note that the light beam LL0 is a light beam in the case where the lens layer 61 does not have the lens surface 611 and the lens layer 61 is made of the same material as the translucent layer 62. By having the lens layer 61 and the translucent layer 62 in this way, the emission angle θ in the sub-pixel P0 can be widened as compared with the case where they are not provided. Further, the refractive index of the outside air is smaller than the refractive index of the constituent material of the translucent substrate 9. Therefore, the light beam LL of the light refracted at the lens surface 611 spreads further outward beyond the light beam LL0 by refracting at the surface of the translucent substrate 9. Thus, the emission angle θ can be further widened as compared with the case where the translucent substrate 9 is not provided.

[0058] As described above, the display device 100 includes a substrate 10, a lens layer 61, a light-transmitting layer 62, a pixel electrode 23, and a color filter 5. The refractive index of the constituent material of the lens 610 is lower than that of the constituent material of the light-transmitting layer 62. And one lens 610 is disposed corresponding to one pixel electrode 23. That is, one pixel electrode 23 and one lens 610 are provided for one sub-pixel P0. By providing the lens 610 for each sub-pixel P0, the emission angle θ of the light emitted from each sub-pixel P0 can be widened. Therefore, the viewing angle characteristics of the display device 100 can be enhanced. That is, the range of the viewing angle in which there is no image quality change such as color shift and can be viewed can be widened.

[0059] Also, the lens 610 is disposed on the +z-axis side with respect to the color filter 5. Therefore, the emission angle θ of the light with high color purity transmitted through the color filter 5 can be widened. Therefore, the viewing angle characteristics and the image quality can be enhanced as compared with the case where the lens 610 is disposed on the -z-axis side with respect to the color filter 5.

[0060] Also, in the present embodiment, the lens 610 is provided for all the sub-pixels P0. Therefore, the display device 100 is particularly excellent in viewing angle characteristics. Note that the lens 610 may not be provided for some of all the sub-pixels P0.

[0061] Also, as described above, the lens surface 611 of the lens 610 is a convex surface, but the refractive index of the constituent material of the lens 610 is lower than that of the constituent material of the light-transmitting layer 62. Therefore, as described above, the light beam LL can be widened by the lens surface 611. Also, since the shape of the lens 610 is convex, the formation of the lens 610 is easier than in the case where it is concave. The formation method will be described in detail later.

[0062] Also, as described above, the color filter 5, the lens layer 61, the light-transmitting layer 62, and the light-transmissive substrate 9 are arranged in this order. By arranging them in such an order, when forming each layer so as to stack from the substrate 10 side, it is easy to form the convex lens 610 on the color filter 5.

[0063] Furthermore, the lens layer 61 is in contact with the color filter 5. The surface of the lens layer 61 opposite to the lens surface 611 is in contact with the color filter 5. By the lens layer 61 being in contact with the color filter 5, compared to the case where another member is arranged between the lens layer 61 and the color filter 5, the light transmitted through the color filter 5 can be efficiently incident on the lens 610. Therefore, the utilization efficiency of the light transmitted through the color filter 5 can be increased. Thus, a bright image can be displayed.

[0064] Note that other members may be arranged between each of the color filter 5, the lens layer 61, the light-transmitting layer 62, and the light-transmissive 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.

[0065] Also, as shown in FIG. 6, it is preferable that the lens 610 overlaps all of the pixel electrodes 23 in plan view, and the planar area of the lens 610 is larger than the planar 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 display device 100 that is bright and has a wide emission angle θ can be realized.

[0066] In addition, the display device 100 in the present embodiment has an organic EL element 20. That is, the display device 100 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. By having the organic EL element 20 in the display device 100, an organic EL display device is configured. Therefore, according to the display device 100, an organic EL display device with excellent viewing angle characteristics can be realized.

[0067] Furthermore, the display device 100 has an optical resonance structure. By providing the optical resonator structure, enhancement of the intensity of light and narrowing of the spectrum of the light are achieved. Therefore, since the display device 100 having the optical resonance structure has the lens layer 61 and the light-transmitting layer 62, the effect of expanding the emission angle θ by the lens surface 611 is particularly preferably exhibited, and the viewing angle characteristics are further improved.

[0068] 1B. Manufacturing Method of Display Device 100 FIG. 8 is a flow of the manufacturing method of the display device 100 in the first embodiment. As shown in FIG. 8, the manufacturing method of the display device 100 includes a device substrate preparation step S11, an insulating layer formation step S12, a device part 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 performing these in this order, the display device 100 is manufactured.

[0069] In the device substrate preparation step S11, the aforementioned substrate 10 and the reflective layer 21 are formed. In the insulating layer formation step S12, the insulating layer 22 is formed. In the device part formation step S13, the device part 2 is formed on the insulating layer 22. That is, a plurality of organic EL elements 20 are formed. Also, in the protective layer formation step S14, the protective layer 4 is formed. In the color filter formation step S15, the color filter 5 is formed. The device substrate 1, the reflective layer 21, the device part 2, the protective layer 4, and the color filter 5 are formed by known techniques.

[0070] Figures 9, 10, 11, and 12 are diagrams for explaining the lens layer forming step S16 in the first embodiment. First, as shown in FIG. 9, a lens material layer 61a is formed by depositing a lens-forming composition on a color filter 5. 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. In the formation of the lens material layer 61a, for example, a CVD method is used. 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 to be formed. The mask M1 is formed using, for example, a positive-type photosensitive resist in which the exposed portion is removed by development. The plurality of pattern portions M11 are formed by patterning using photolithography technology.

[0071] Next, the mask M1 is melted by subjecting the mask M1 to a heat treatment such as a reflow process. When the mask M1 is melted, it becomes in a fluid state, and the surface is deformed into a curved surface shape by the action of surface tension. By deforming, as shown in FIG. 10, a plurality of convex portions M12 are formed on the lens material layer 61a. One convex portion M12 is formed from one pattern portion M11. The shape of the convex portion M12 is substantially hemispherical.

[0072] Next, anisotropic etching such as dry etching is performed on the convex portion M12 and the lens material layer 61a. As a result, the convex portion M12 is removed, and along with the removal of the convex portion M12, the exposed portion of the lens material layer 61a is etched. As a result, the shape of the convex portion M12 is transferred to the lens material layer 61a, and as shown in FIG. 11, a plurality of lens convex portions 611a are formed. Next, the lens material layer 61a, that is, the same material as the lens convex portion 611a, is deposited on the lens convex portion 611a using, for example, a CVD method. As a result, as shown in FIG. 12, a lens coating 612a is formed on the plurality of lens convex portions 611a. Therefore, a lens layer 61 composed of the plurality of lens convex portions 611a and the lens coating 612a is formed.

[0073] As a method for processing the shape of the convex portion M12 from the mask M1, for example, a method of exposing using a gray scale mask or the like, or a method of multi-stage exposure may be used. In the above description, a mask is used, but the lens 610 may be directly formed from a resin material such as an acrylic resin using photolithography technology.

[0074] FIG. 13 is a diagram for explaining the light-transmitting layer forming step S17 in the first embodiment. As shown in FIG. 13, in the light-transmitting layer forming step S17, the light-transmitting layer 62 is formed by depositing a light-transmitting layer forming composition on the lens layer 61. The light-transmitting layer forming composition has a refractive index higher than that of the above-described lens forming composition.

[0075] For example, when the light-transmitting layer forming composition is an adhesive, the light-transmitting layer forming composition is deposited on the lens layer 61. Then, the light-transmissive 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-transmissive substrate 9 is bonded to the element substrate 1. When the light-transmitting layer 62 has no adhesiveness, an adhesive layer for bonding the light-transmitting layer 62 and the light-transmissive substrate 9 is provided therebetween.

[0076] According to the above method, the display device 100 can be formed easily and quickly. Further, since the shape of the lens 610 is convex, 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 more easily and with higher precision than when the shape of the lens 610 is concave. Further, even when the constituent material of the lens layer 61 is an inorganic material, it is easy to form the convex lens 610 using photolithography technology or the like. Further, since the lens layer 61 is formed on the color filter 5, the alignment between the colored portion 51 and the lens 610 can be performed particularly easily.

[0077] 2. Second Embodiment Next, a second embodiment of the present invention will be described. FIG. 14 is a diagram schematically showing a display device 100a according to the second embodiment. This embodiment is different from the first embodiment in that the thicknesses of the coloring portions 51B, 51G, and 51R are different from each other and the planarization layer 7 is provided. For matters similar to those in the first embodiment in the second embodiment, the reference numerals used in the description of the first embodiment are used, and the detailed description of each is appropriately omitted.

[0078] In the display device 100a shown in FIG. 14, the thicknesses of the coloring portions 51B, 51G, and 51R are different from each other. For example, the thicknesses are adjusted so as to obtain an appropriate chromaticity and the like. Here, by forming the coloring portions 51B, 51G, and 51R having different thicknesses on the protective layer 4 having a flat surface, the surface on the +z-axis side of the color filter 5a has irregularities. Therefore, it becomes difficult to form the lens layer 61 on the surface on the +z-axis side of the color filter 5a. Therefore, in the display device 100a according to the present embodiment, a light-transmissive planarization layer 7 is disposed on the color filter 5. In other words, the planarization layer 7 is disposed between the color filter 5a and the lens layer 61.

[0079] The surface on the +z-axis side of the planarization layer 7 is a flat surface 71. The flat surface 71 is in contact with the lens layer 61. The planarization layer 7 alleviates the irregularities of the color filter 5. Therefore, by having the planarization layer 7, the lens 610 can be formed on the flat surface 71. Therefore, the lens layer 61 can be formed without being affected by the irregularities on the surface on the +z-axis side of the color filter 5a.

[0080] The planarization layer 7 is composed of, for example, an inorganic layer composed of an inorganic material, an organic layer composed of an organic layer, or a laminate of an inorganic layer and an organic layer.

[0081] 3. Third Embodiment Next, a third embodiment of the present invention will be described. FIG. 15 is a diagram schematically showing a display device 100b in the third embodiment. FIG. 16 is a diagram for explaining a manufacturing method of the display device 100b in the third embodiment. This embodiment is different from the first embodiment in that the arrangement of the lens layer 61 and the light-transmitting layer 62 is different. Regarding the matters similar to those in the first embodiment in the third embodiment, the reference numerals used in the description of the first embodiment are reused, and the detailed description of each is appropriately omitted.

[0082] In the display device 100b shown in FIG. 15, the light-transmitting layer 62 and the lens layer 61 are arranged in this order from the color filter 5 toward the light-transmissive substrate 9. That is, the color filter 5, the light-transmitting layer 62, the lens layer 61, and the light-transmissive substrate 9 are arranged in this order. Further, the lens 610 protrudes from the light-transmissive substrate 9 toward the color filter 5 side. Therefore, the lens surface 611 is a convex surface protruding toward the color filter 5. Also in this embodiment, similar to the first embodiment, the refractive index of the constituent material of the lens 610 is lower than the refractive index of the constituent material of the light-transmitting layer 62.

[0083] Also, due to the arrangement of the light-transmitting layer 62 and the lens layer 61 shown in FIG. 15, the lens surface 611 can expand the light beam LL. Therefore, also in this embodiment, similar to the first embodiment, by having the lens layer 61 and the light-transmitting layer 62, the emission angle θ in the sub-pixel P0 can be expanded as compared with the case where they are not provided. Further, by having the light-transmissive substrate 9, the emission angle θ can be further expanded.

[0084] In the manufacture of such a display device 100b, as shown in FIG. 16, a lens layer 61 is formed on a translucent substrate 9. As the method for forming the lens layer 61, the same method as that described in the first embodiment is used. Thereafter, a deposited layer 62a composed of a composition for forming a translucent layer is formed on the lens layer 61. Thereafter, by moving the translucent substrate 9 in the direction of arrow A9, the deposited layer 62a is pressed against the color filter 5. Then, in the pressed state, the deposited layer 62a is cured. By curing the deposited layer 62a, the translucent layer 62 is bonded to the color filter 5. When the translucent layer 62 has no adhesiveness, an adhesive layer for bonding these is provided between the translucent layer 62 and the color filter 5.

[0085] According to such a method, by forming the lens layer 61 on the surface of the translucent substrate 9, the convex lens 610 can be easily and highly accurately formed on the translucent substrate 9 by using a photolithography technique or the like. Further, since the lens layer 61 is formed on the translucent substrate 9, even in the case of the organic EL element 20 having poor heat resistance, the influence of heat or the like on the organic EL element 20 is reduced.

[0086] 4. Modification Each of the embodiments exemplified above can be variously modified. Specific modification modes applicable to the above-described embodiments are exemplified below. Two or more modes arbitrarily selected from the following examples can be appropriately combined within a range not conflicting with each other.

[0087] 4-1. First Modification In each of the above-described embodiments, the organic EL element 20 includes an optical resonance structure having a different resonance length for each color, but it may not include an optical resonance structure. The element portion 2 may include, for example, a partition wall that partitions the functional layer 24 for each organic EL element 20. Further, the pixel electrode 23 may have light reflectivity. In that case, the reflective layer 21 may be omitted. Further, although the common electrode 25 is common to the plurality of organic EL elements 20, an individual cathode may be provided for each organic EL element 20.

[0088] 4-2. Second Modification A so-called black matrix having light-shielding properties may be disposed between the lenses 610. By disposing the black matrix, it is possible to suppress or prevent light transmitted through the colored portion 51 provided in a certain sub-pixel P0 from entering the lens 610 provided in the sub-pixel P0 adjacent to the sub-pixel P0. Further, a black matrix may be disposed between the colored portions 51 in order to prevent color mixing between adjacent colored portions 51.

[0089] 4-3. Third Modification The shapes of the pixel electrode 23, the lens 610, and the color filter 5 in plan view are not limited to the shapes in the above-described embodiments. FIG. 17 is a diagram for explaining a modification of the pixel electrode 23 and the lens 610. The shapes of the pixel electrode 23 and the lens 610 shown in FIG. 17 in plan view may be rectangular. The length along the +x direction and the length along the +y direction may be different. FIG. 18 is a diagram for explaining a modification of the colored portion 51 and the lens 610, and is a cross-sectional view taken along line B-B shown in FIG. 17. FIG. 19 is a diagram for explaining a modification of the colored portion 51 and the lens 610, and is a cross-sectional view taken along line C-C shown in FIG. 17. As shown in FIGS. 18 and 19, the shape of the lens 610 in plan view is appropriately set in accordance with the shape of the light-emitting portion in plan view. Therefore, the shape of the lens 610 in plan view may correspond to the shape of the pixel electrode 23 shown in FIG. 17 in plan view. The same applies to the shape of the colored portion 51. Further, as shown in FIGS. 18 and 19, adjacent lenses 610 may be spaced apart from each other.

[0090] FIG. 20 is a plan view showing a modified example of the color filter 5. As shown in FIG. 20, the colored portions 51 may be arranged corresponding to the plurality of pixel electrodes 23. Specifically, the colored portion 51B overlaps with the plurality of pixel electrodes 23B corresponding to blue. The colored portion 51G overlaps with the plurality of pixel electrodes 23G corresponding to green. The colored portion 51R overlaps with the plurality of pixel electrodes 23R corresponding to red. In the example shown in FIG. 20, the colored portions 51B, 51G, and 51R are arranged in a stripe pattern. Also, the colored portions 51B, 51G, and 51R may overlap each other in plan view. In FIG. 20, the colored portion 51B has an overlapping portion 519B that overlaps the colored portion 51G in plan view. The colored portion 51G has an overlapping portion 519G that overlaps the colored portion 51R in plan view.

[0091] FIGS. 21, 22, 23, and 24 are each a plan view showing a modified example of the pixel electrode 23, the lens 610, and the colored portion 51. In FIGS. 21, 22, and 23, the pixel electrode 23, the lens 610, and the colored portion 51 in one pixel P are illustrated. In FIG. 24, the portion surrounded by the thick line corresponds to one pixel P.

[0092] As shown in FIG. 21, the shapes of the plurality of pixel electrodes 23 in each plan view may be different from each other. The shapes of the lens 610 and the colored portion 51 in each plan view may be adapted to the shape of the light-emitting portion. Thus, the shapes of the lens 610 and the colored portion 51 in each plan view may correspond to the shape of the pixel electrode 23 in plan view. Therefore, as shown in FIG. 21, the shapes of the plurality of lenses 610 in each plan view may be different from each other. The shapes of the plurality of colored portions 51 in each plan view may be different from each other.

[0093] As shown in FIG. 22, the arrangement of the colored portions 51B, 51G, and 51R may be a so-called rectangle arrangement. The colored portions 51B, 51G, and 51R do not have to be arranged in the +y direction. As shown in FIG. 22, the arrangements of the pixel electrode 23 and the lens 610 are arranged corresponding to the arrangement of the colored portion 51.

[0094] As shown in FIG. 23, the arrangement of the colored portions 51B, 51G, and 51R may be a so-called Bayer array. One pixel P may have a plurality of colored portions 51 of the same color. In FIG. 22, one pixel P has two colored portions 51B.

[0095] As shown in FIG. 24, the arrangement of the colored portions 51B, 51G, and 51R may be a so-called delta array. The shape of one pixel P in plan view does not have to be a quadrangle. Note that the shapes of the pixel electrode 23, the lens 610, and the colored portion 51 in plan view are not limited to quadrangles, and may be polygons other than quadrangles such as hexagons, or may be circular.

[0096] 4-4. Fourth Modified Example A part of the lens 610 and the colored portion 51 does not have to overlap the corresponding pixel electrode 23 in plan view. For example, the lens 610 and the colored portion 51 may be displaced and arranged closer to the center of the display region A10 or outside the display device A10 than the corresponding pixel electrode 23 in plan view.

[0097] FIGS. 25 and 26 are diagrams schematically showing modified examples of the pixel electrode 23, the colored portion 51, and the lens 610, respectively. By arranging the colored portion 51 so as to be displaced from the pixel electrode 23 in plan view, as shown in FIG. 25 or FIG. 26, the principal ray A1 can be inclined with respect to the normal line a1 of the pixel electrode 23. Therefore, the inclination angle θa of the principal ray A1 can be increased. The inclination angle θa is the angle formed by the normal line a1 of the pixel electrode 23 and the principal ray A1. Then, the lens 610 can expand the light beam LL wider than the light beam LL0.

[0098] When the coloring portion 51 is displaced to the outside of the display area A10 with respect to the pixel electrode 23, the main light beam A1 can be inclined outward with respect to the normal line a1. With such an arrangement, the viewing angle characteristics can be further enhanced. On the other hand, when the coloring portion 51 is displaced to the center side of the display area A10 with respect to the pixel electrode 23, the main light beam A1 can be inclined toward the center with respect to the normal line a1. With such an arrangement, it is possible to suppress deterioration of image quality such as color unevenness in the display device 100.

[0099] 5. Electronic device The display device 100 of the foregoing embodiment can be applied to various electronic devices.

[0100] 5A. Virtual image display device 900 FIG. 27 is a diagram schematically showing 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. 27 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-described display device 100 and an eyepiece lens 90. The image displayed on the display device 100 is emitted as video light L. In FIG. 27, the light entering the eye EY is shown as the video light L.

[0101] The video light L emitted from the display device 100 is enlarged by the eyepiece lens 90 which is a condenser lens. Then, by guiding the video light L enlarged by the eyepiece lens 90 to the human eye EY, a human can view a virtual image formed by the video light L. Note that various other lenses, a light guide plate, etc. may be provided between the eyepiece lens 90 and the eye EY.

[0102] In the virtual image display device 900, in order to obtain a large virtual image, it is necessary to increase the angular field θ1. In order to increase the angular field θ1, it is necessary to increase the eyepiece lens 90. In order to increase the angular field 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 line a1 of the surface of the pixel electrode 23.

[0103] The virtual image display device 900 includes the aforementioned display device 100. According to the display device 100, the emission angle θ can be widened for each sub-pixel P0. Therefore, the angle a can be increased compared to conventional devices. Therefore, even if the display device 100 having a planar area smaller than the planar area of the eyepiece 90 is used, the angular field θ1 can be widened. Thus, even if the display device 100 smaller than the conventional device is used, a human can view a virtual image of the same size as when using the conventional device. That is, a large virtual image can be formed using a display device 100 smaller than before. By using such a display device 100, the virtual image display device 900 can be miniaturized.

[0104] In addition, since the emission angle θ in each sub-pixel P0 becomes wider, the range of light that reaches the eye EY from each sub-pixel P0 becomes wider. Therefore, the range where the light beams LL emitted from the aforementioned each sub-pixel P0 overlap becomes wider. Thus, the allowable range of the position of the eye EY where the virtual image can be viewed becomes wider. Therefore, for example, it can be suitably adapted to individual differences such as a person with a narrow distance between both eyes, a person with a wide distance between both eyes, a person with large eyes EY, and a person with small eyes EY.

[0105] Note that examples of the "electronic device" including the display device 100 include devices having an eyepiece such as the virtual image display device 900 illustrated in FIG. 27, an electronic viewfinder, and electronic binoculars. In addition, examples of the "electronic device" include devices such as a personal computer, a smartphone, and a digital camera that include the display device 100 as a display unit.

[0106] As described above, the present invention has been described based on the illustrated embodiments, but the present invention is not limited thereto. In addition, the configuration of each part of the present invention can be replaced with any configuration that exhibits the same function as that of the above-described embodiments, and any configuration can also be added. Further, the present invention may be configured by combining any of the configurations of the above-described embodiments.

[0107] The "display device" is not limited to an organic EL display device, and may also be an EL display device using an inorganic material, a liquid crystal display device including a liquid crystal, or a device including an LED array.

[0108] The "display device" is not limited to a device that displays a full-color image, and may also be a device that displays only a monochromatic image. For example, the "display device" may be a device that displays an image represented in green, or a device that displays an image represented in orange.

[0109] The light-emitting portion of the pixel electrode 23 that is in contact with the functional layer 24 may be regarded as the "pixel electrode".

Explanation of Reference Numerals

[0110] 1... Element substrate, 2... Element portion, 4... Protective layer, 5... Color filter, 7... Flattening layer, 9... Translucent 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, 24... Functional layer, 25... Common electrode, 30... Pixel circuit, 31... Switching transistor, 32... Driving transistor, 33... Holding capacitor, 41... First layer, 42... Second layer, 43... Third layer, 51... Colored portion, 51B... Colored portion, 51G... Colored portion, 51R... Colored portion, 61... Lens layer, 61a... Lens material layer, 62... Translucent layer, 62a... Deposited layer, 71... Flat surface, 90... Eyepiece lens, 100... Display device, 100a... Display device, 100b... Display device, 101... Data line driving circuit, 102... Scanning line driving circuit, 103... Control circuit, 104... External terminal, 210... Reflective 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, 610... Lens, 611... Lens surface, 611a... Convex portion for lens, 612a... Coating for lens, 900... Virtual image display device, A1... Chief ray, A10... Display area, A20... Peripheral area, EY... Eye, L... Image light, L0... Optical distance, LL... Light beam, LL0... Light beam, M1... Mask, M11... Pattern portion, M12... Convex portion, P... Pixel, P0... Sub-pixel, PB... Sub-pixel, PG... Sub-pixel, PR... Sub-pixel.

Claims

Claim 1 a common electrode having light reflectivity and translucency; a first reflection part, a second reflection part, and a third reflection part that are adjacent to each other along a first direction in a plan view; a first pixel electrode having translucency and provided between the first reflection part and the common electrode; a second pixel electrode having translucency and provided between the second reflection part and the common electrode; a third pixel electrode having translucency and provided between the third reflection part and the common electrode; a light-emitting layer provided between the common electrode and the first pixel electrode, between the common electrode and the second pixel electrode, and between the common electrode and the third pixel electrode; a substrate that transmits light emitted from the light-emitting layer; a first colored part provided corresponding to the first pixel electrode between the substrate and the common electrode; a second colored part provided corresponding to the second pixel electrode between the substrate and the common electrode; a third colored part provided corresponding to the third pixel electrode between the substrate and the common electrode; a first lens provided between the substrate and the first colored part; a second lens provided between the substrate and the second colored part; a third lens provided between the substrate and the third colored part; and a translucent layer provided in contact with the first lens, the second lens, and the third lens. In a cross-sectional view along the first direction and the normal direction of the substrate, the distance in the normal direction between the first reflection part and the common electrode, the distance in the normal direction between the second reflection part and the common electrode, and the distance in the normal direction between the third reflection part and the common electrode become shorter in this order. The thickness of the first colored part, the thickness of the second colored part, and the thickness of the third colored part become thinner in this order. Each lens surface of the first lens, the second lens, and the third lens is a convex surface protruding toward the substrate, and the refractive index of each of the first lens, the second lens, and the third lens is lower than the refractive index of the translucent layer. A display device characterized by the above. Claim 2 The display device according to claim 1, wherein in the cross-sectional view, the distance in the normal direction between the first reflection part and the first colored part is equal to the distance in the normal direction between the second reflection part and the second colored part. Claim 3 The display device according to claim 1 or 2, wherein, in the cross-sectional view, a distance in the normal direction between the substrate and the first pixel electrode is shorter than a distance in the normal direction between the substrate and the second pixel electrode.

4. The display device according to any one of claims 1 to 3, wherein the first reflective portion is electrically connected to the first pixel electrode, and the second reflective portion is electrically connected to the second pixel electrode.

5. The display device according to any one of claims 1 to 4, wherein, in the cross-sectional view, a distance in the normal direction between the substrate and the first colored portion is shorter than a distance in the normal direction between the substrate and the second colored portion, and a distance in the normal direction between the first colored portion and the first pixel electrode is shorter than a distance in the normal direction between the second colored portion and the second pixel electrode.

6. An electronic device comprising the display device according to any one of claims 1 to 5.

Images