WO2022085749A1

WO2022085749A1 - Display device, and electronic instrument

Info

Publication number: WO2022085749A1
Application number: PCT/JP2021/038862
Authority: WO
Inventors: 知彦島津
Original assignee: ソニーセミコンダクタソリューションズ株式会社
Priority date: 2020-10-23
Filing date: 2021-10-21
Publication date: 2022-04-28
Also published as: CN116507948A

Abstract

Provided is a display device which is capable of suppressing color mixing of light, and which has an excellent light extraction efficiency.　This display device is provided with: a plurality of sub-pixels which form pixel units and which correspond at least to red, green, and blue color types; a plurality of light emitting elements which are formed corresponding to each sub-pixel, and which have a structure in which a first electrode and a second electrode are stacked sandwiching an organic compound layer; and at least one lens formed to correspond to each sub-pixel. Each light emitting element is provided with an insulating layer which covers a peripheral edge portion of the first electrode, and in which an opening portion is formed on the first electrode to correspond to each sub-pixel, wherein formula 1 and formula 2 are satisfied. (Formula 1): ΣLR/WR<ΣLB/WB (Formula 2): ΣLG/WG<ΣLB/WB (Where, in formula 1 and formula 2, WR, WG, and WB are respectively the width in the horizontal direction of the opening portions corresponding to the red, green, and blue sub-pixels. ΣLR represents the width in the horizontal direction of the bottom surface of the lens formed to correspond to the red sub-pixel if a first horizontal arrangement number is 1, and represents the sum of the widths in the horizontal direction of the bottom surfaces of each lens formed side by side in the horizontal direction to correspond to the red sub-pixels if the first horizontal arrangement number is 2 or more. ΣLG represents the width in the horizontal direction of the bottom surface of the lens formed to correspond to the green sub-pixel if a second horizontal arrangement number is 1, and represents the sum of the widths in the horizontal direction of the bottom surfaces of each lens formed side by side in the horizontal direction to correspond to the green sub-pixels if the second horizontal arrangement number is 2 or more. ΣLB represents the width in the horizontal direction of the bottom surface of the lens formed to correspond to the blue sub-pixel if a third horizontal arrangement number is 1, and represents the sum of the widths in the horizontal direction of the bottom surfaces of each lens formed side by side in the horizontal direction to correspond to the blue sub-pixels if the third horizontal arrangement number is 2 or more.)

Description

Display devices and electronic devices

This disclosure relates to display devices and electronic devices. The present disclosure particularly relates to a display device including a plurality of light emitting elements having an organic compound layer and a plurality of lenses, and an electronic device including the display device.

As a display device including a plurality of light emitting elements having an organic compound layer and a plurality of lenses, a technique for improving the uniformity of characteristics between sub-pixels having different color types is disclosed. For example, Patent Document 1 discloses a display device having a rectangular pixel region of three colors corresponding to each of red, blue, and green as sub-pixels corresponding to three colors of red, blue, and green. There is. In the display device of Patent Document 1, on the light emitting surface of another rectangular pixel region having a luminance lower than the luminance in the rectangular pixel region of 1, with respect to the length of the short side in the other rectangular pixel region. A hemispherical lens having a lens diameter of 2 times or more and 4 times or less is provided.

Japanese Unexamined Patent Publication No. 2011-54488

Regarding the uniformity of the characteristics between the sub-pixels having different color types, it is required to suppress not only the luminance as shown in Patent Document 1 but also the chromaticity deviation, that is, to improve the viewing angle characteristics. ing.

The present disclosure has been made in view of the above points, and one of the purposes of the present disclosure is to provide a display device having excellent viewing angle characteristics.

The present disclosure relates to, for example, (1) a plurality of sub-pixels forming a pixel unit and corresponding to at least red, green, and blue color types.
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A lens formed at least one corresponding to each of the sub-pixels is provided.
Each of the light emitting elements is provided with an insulating layer that covers the peripheral edge of the first electrode and forms an opening corresponding to each of the sub-pixels on the first electrode.
The following formulas 1 and 2 are satisfied.
It is a display device.

ΣLR / WR <ΣLB / WB ... (Formula 1)

ΣLG / WG <ΣLB / WB ... (Formula 2)

However, in the formula 1 and the formula 2, the WR is the horizontal width of the opening corresponding to the red sub-pixel, and is along the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations is the first horizontal arrangement number, the ΣLR is the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. When the number of the first horizontal arrangements is 2 or more, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels is shown.
The WG is the horizontal width of the opening corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In addition, if the number of front second horizontal arrangements is 1, the ΣLG has a horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second horizontal arrangements is 2 or more. For example, the total horizontal width of the bottom surface of each of the lenses formed in a horizontally aligned state corresponding to the green sub-pixel is shown.
The WB is the horizontal width of the opening corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. In addition, if the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. For example, the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the blue sub-pixels is shown.

The present disclosure comprises (2) a plurality of sub-pixels corresponding to at least red, green and blue color types.
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A wall surface is formed around the lens formed at least one corresponding to each of the sub-pixels and each of the light emitting elements corresponding to each of the sub-pixels, and from the first electrode to the second electrode. It is provided with a reflective wall extending in the direction toward which the following equations 3 and 4 are satisfied.
It may be a display device.

ΣLR / WrR <ΣLB / WrB ... (Formula 3)

ΣLG / WrG <ΣLB / WrB ... (Formula 4)

However, in the formula 3 and the formula 4, the WrR is the horizontal width of the tip of the wall surface corresponding to the red sub-pixel, and is in the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations along the line is the first horizontal arrangement number, the ΣLR is the horizontal direction of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. The width, if the first horizontal arrangement number is 2 or more, indicates the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels.
The WrG is the horizontal width of the tip of the wall surface corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In this case, if the number of front second horizontal arrangements is 1, the width of the bottom surface of the lens formed corresponding to the green sub-pixels and the number of second horizontal arrangements are 2 or more. If, then the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the green sub-pixels is shown.
The WrB is the horizontal width of the tip of the wall surface corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. If the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. If, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the blue sub-pixels is shown.

The present disclosure comprises (3) a plurality of sub-pixels corresponding to at least red, green and blue color types.
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A lens formed at least one corresponding to each of the sub-pixels,
A reflector plate formed at a predetermined position on the formation surface side of the first electrode of the light emitting element corresponding to each of the sub-pixels is provided.
The following formulas 5 and 6 are satisfied.
It may be a display device.

ΣLR / WbR <ΣLB / WbB ... (Formula 5)

ΣLG / WbG <ΣLB / WbB ... (Formula 6)

However, in the formula 5 and the formula 6, the WbR is the horizontal width of the reflector corresponding to the red sub-pixel, and is along the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations is the first horizontal arrangement number, the ΣLR is the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. When the number of the first horizontal arrangements is 2 or more, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels is shown.
The WbG is the horizontal width of the reflector corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In addition, if the number of front second horizontal arrangements is 1, the ΣLG has a horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second horizontal arrangements is 2 or more. For example, the total horizontal width of the bottom surface of each of the lenses formed in a horizontally aligned state corresponding to the green sub-pixel is shown.
The WbB is the horizontal width of the reflector corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. In addition, if the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. For example, the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the blue sub-pixels is shown.

Further, the present disclosure may be, for example, an electronic device provided with the display device described in (1) above.

FIG. 1 is a cross-sectional view for explaining an embodiment of a display device according to a first embodiment. FIG. 2A is a plan view showing a display area of the display device according to the first embodiment. FIG. 2B is a plan view showing an embodiment of the layout of the sub-pixels. 3A, 3B, and 3C are cross-sectional views showing an embodiment of a method for manufacturing a display device according to a first embodiment. FIG. 4 is a cross-sectional view for explaining a display device according to another embodiment of the first embodiment. 5A and 5B are plan views for explaining a method of manufacturing a display device according to a modification of the first embodiment. 6A and 6B are plan views showing an embodiment of the layout of the sub-pixels. 7A, 7B, and 7C are diagrams showing an embodiment of the layout of the sub-pixels. 8A and 8B are cross-sectional views for explaining a display device according to a modification of the first embodiment. FIG. 9 is a cross-sectional view for explaining an embodiment of the display device according to the second embodiment. FIG. 10 is a cross-sectional view for explaining an embodiment of the display device according to the third embodiment. FIG. 11 is a cross-sectional view for explaining a display device according to a modified example of the fourth embodiment. FIG. 12 is a cross-sectional view for explaining a method of manufacturing a display device according to a modified example of the first embodiment. FIG. 13 is a cross-sectional view for explaining a method of manufacturing a display device according to a modified example of the first embodiment. FIG. 14 is a cross-sectional view for explaining a method of manufacturing a display device according to a modified example of the first embodiment. 15A and 15B are diagrams for explaining a first simulation example. 16A and 16B are diagrams for explaining a second simulation example. FIG. 17 is a diagram for explaining a second simulation example. 18A and 18B are diagrams for explaining an embodiment of an electronic device using a display device. FIG. 19 is a diagram for explaining an embodiment of an electronic device using a display device. FIG. 20 is a diagram for explaining an embodiment of an electronic device using a display device.

Hereinafter, an embodiment or the like according to the present disclosure will be described with reference to the drawings. The explanation will be given in the following order. In the present specification and the drawings, configurations having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.

The explanations will be given in the following order.
1. 1. First embodiment 2. Second embodiment 3. Third embodiment 4. Fourth Embodiment 5. Simulation example 6. Application example (electronic device)

The following description is a suitable specific example of the present disclosure, and the content of the present disclosure is not limited to these embodiments and the like. Further, in the following description, directions such as front-back, left-right, up-down, etc. are shown for convenience of explanation, but the content of the present disclosure is not limited to these directions. In the examples of FIGS. 1 and 2, the Z-axis direction is the thickness direction (the upper side is the + Z direction, the lower side is the −Z direction), the X-axis direction is the horizontal direction, and the Y-axis direction is the vertical direction. Further, the thickness direction is sometimes called the vertical direction. This also applies to FIGS. 3 to 14. The size and thickness of each layer shown in FIGS. 1 and the like, the relative size ratio of each configuration and the size and thickness of each region are described for convenience, and do not limit the actual size ratio. The rules regarding these directions and the magnitude ratio are the same for each of the figures shown in FIGS. 2 to 14.

[1 First Embodiment]
[1-1 Display device configuration]
FIG. 1 is a cross-sectional view showing a configuration example of a display device 10 according to an embodiment of the present disclosure. The display device 10 includes a substrate 11, a plurality of light emitting elements 13, an insulating layer 14, a protective layer 15, a plurality of color filters 17, and a lens 18.

The display device 10 is a top emission type display device. The substrate 11 is located on the back surface side of the display device 10, and the direction from the substrate 11 to the lens 18 is the front surface side direction of the display device 10. The forming surface side of the lens 18 faces the top side, and the substrate 11 side faces the bottom side. The direction connecting the top side and the bottom side is the thickness direction (vertical direction) of the display device 10. In the following description, in each layer constituting the display device 10, the surface on the display surface side of the display device 10 is referred to as a first surface (upper surface, front surface), and the surface on the back surface side of the display device 10 is referred to as a second surface. It is called a surface (bottom surface).

The display device 10 may be, for example, an OLED (Organic Light Emitting Diode). The display device 10 may be a micro display, and specifically, a self-luminous element such as a Micro-OLED (Micro-Organic Light Emitting Diode) or a Micro-LED (Micro-Light Emitting Diode) is formed in an array. It may be a micro display or the like. Further, the display device 10 may be used in various electronic devices as described later. Examples of the electronic device in which the display device 10 is used include a display device for VR (Virtual Reality), MR (Mixed Reality), or AR (Augmented Reality), an electronic viewfinder (EVF), or a small projector. And so on.

(Pixel and sub-pixel)
In the display device 10, as shown in FIG. 2A, the peripheral area 110B (different from the area of reference numeral 110A) is located on the periphery of the display area 110A (area shown with hatching) and the display area 110A on the substrate 11. Areas shown with hatching) are provided. In the display area 110A, sub-pixels (sub-pixels 100R, 100G, 100B) corresponding to red, green, and blue color types are arranged in a matrix as sub-pixels 100 corresponding to a plurality of color types. The sub-pixel 100R displays red, the sub-pixel 100G displays green, and the sub-pixel 100B displays blue. FIG. 2A is a plan view showing an example of the display device 10 according to the first embodiment. In this specification, the term sub-pixel 100 may be used when the sub-pixels 100R, 100G, and 100B are not particularly distinguished. Further, in FIG. 2A, the region surrounded by the broken line XS indicates a region of one pixel, and in FIG. 2B, a partially enlarged view of the portion surrounded by the broken line XS is shown.

The combinations of sub-pixels 100R, 100G, and 100B that display the same color are repeatedly arranged two-dimensionally in the horizontal and vertical directions. In the examples of FIGS. 1, 2A, and 2B, the sub-pixels 100R, 100G, and 100B corresponding to the three color types are arranged in the horizontal direction, and the combination thereof is one pixel (pixel unit) (pixel). (Fig. 2B). In the example of FIG. 1, the combinations of the sub-pixels 100R, 100G, and 100B are arranged in the X-axis direction and the Y-axis direction. The horizontal direction corresponds to a direction that is left-right when the user views an image displayed in the display area 110A, and the vertical direction corresponds to a direction that is orthogonal to the horizontal direction in the display area 110A.

(Board 11)
The substrate 11 is provided with various circuits for driving a plurality of light emitting elements 13. That is, on the first surface of the substrate 11, a drive circuit including a sampling transistor for controlling the drive of the plurality of light emitting elements 13 and a drive transistor, and a power supply circuit for supplying power to the plurality of light emitting elements 13 (all). (Not shown) is provided.

The substrate 11 may be made of, for example, glass or resin having low permeability of water and oxygen, or may be made of a semiconductor such as a transistor which can be easily formed. Specifically, the substrate 11 may be a glass substrate, a semiconductor substrate, a resin substrate, or the like. The glass substrate includes, for example, high strain point glass, soda glass, borosilicate glass, forsterite, lead glass, quartz glass and the like. The semiconductor substrate includes, for example, amorphous silicon, polycrystalline silicon, single crystal silicon, and the like. The resin substrate contains, for example, at least one selected from the group consisting of polymethylmethacrylate, polyvinyl alcohol, polyvinylphenol, polyether sulfone, polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate and the like.

Generally, an insulating film (not shown) that covers the above-mentioned drive circuit, power supply circuit, and the like is formed on the first surface of the substrate 11, and the first electrode 13A constituting the light emitting element 13 is formed via the insulating film. A plurality of contact plugs for connecting to the drive circuit are provided.

(Light emitting element 13)
The plurality of light emitting elements 13 are provided on the first surface side of the substrate 11. The plurality of light emitting elements 13 are formed in a predetermined arrangement pattern such as a matrix. In the example of FIG. 1, the light emitting element 13 is configured to be capable of emitting white light. The light emitting element 13 is, for example, a white OLED or a white Micro-OLED (MOLED). In the present embodiment, as the colorization method in the display device 10, a method using a light emitting element 13 and a color filter 17 is used. However, the colorization method is not limited to this, and an RGB coloring method or the like may be used. Further, instead of the color filter 17, a monochromatic filter may be used. Regarding the light emitting element 13, when the light emitting element 13 is formed by the RGB painting method, the organic compound layer 13B is provided for each color type of the sub-pixel 100. In such a display device 10, the light itself generated from the light emitting element 13 can be set to red, green, and blue color types according to the color type of the sub-pixel 100, so that the color filter 17 may be omitted. ..

The light emitting element 13 includes a first electrode 13A, an organic compound layer 13B, and a second electrode 13C. The first electrode 13A, the organic compound layer 13B, and the second electrode 13C are laminated in this order from the substrate 11 side toward the lens 18 described later.

(First electrode 13A)
The first electrode 13A is provided on the insulating film on the first surface side of the substrate 11. The first electrode 13A is electrically separated for each sub-pixel 100 by an insulating layer 14 described later. The first electrode 13A is an anode.

The first electrode 13A is preferably composed of at least one of a metal layer and a metal oxide layer, and more specifically, a single-layer film of a metal layer or a metal oxide layer, or a metal layer and a metal. It is preferably composed of a laminated film of an oxide layer. When the first electrode 13A is composed of a laminated film, the metal oxide layer may be provided on the organic compound layer 13B side, or the metal layer may be provided on the organic compound layer 13B side. From the viewpoint of adjoining the layer having a high work function to the organic compound layer 13B, it is preferable that the metal oxide layer is provided on the organic compound layer 13B side.

The metal layer is, for example, chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), molybdenum (Mo), titanium (Ti), tantalum (Ta), aluminum (Al). , Magnesium (Mg), Iron (Fe), Tungsten (W) and Silver (Ag). The metal layer may contain at least one of the above metal elements as a constituent element of the alloy. Specific examples of alloys include aluminum alloys and silver alloys. Specific examples of the aluminum alloy include, for example, AlNd or AlCu.

The metal oxide layer contains, for example, at least one of a mixture of indium oxide and tin oxide (ITO), a mixture of indium oxide and zinc oxide (IZO), and titanium oxide (TIO).

(Second electrode 13C)
The second electrode 13C is provided so as to face the first electrode 13A. In the example of FIG. 1, the second electrode 13C is provided as an electrode common to all the sub-pixels 100. The second electrode 13C is a cathode. The second electrode 13C is preferably a transparent electrode having transparency to the light generated in the organic compound layer 13B. Here, it is assumed that the transparent electrode also includes a translucent reflective layer. It is preferable that the second electrode 13C is made of a material having as high a transparency as possible and a small work function in order to increase the luminous efficiency.

The second electrode 13C is composed of at least one of a metal layer and a metal oxide layer. More specifically, the second electrode 13C is composed of a single-layer film of a metal layer or a metal oxide layer, or a laminated film of a metal layer and a metal oxide layer. When the second electrode 13C is composed of a laminated film, the metal layer may be provided on the organic compound layer 13B side or the metal oxide layer may be provided on the organic compound layer 13B side, but the work is low. From the viewpoint of making the layer having a function adjacent to the organic compound layer 13B, it is preferable that the metal layer is provided on the organic compound layer 13B side.

The metal layer contains, for example, at least one metal element selected from the group consisting of magnesium (Mg), aluminum (Al), silver (Ag), calcium (Ca) and sodium (Na). The metal layer may contain at least one of the above metal elements as a constituent element of the alloy. Specific examples of the alloy include MgAg alloy, MgAl alloy, AlLi alloy and the like. The metal oxide contains, for example, at least one of a mixture of indium oxide and tin oxide (ITO), a mixture of indium oxide and zinc oxide (IZO) and zinc oxide (ZnO).

(Organic compound layer 13B)
The organic compound layer 13B is provided between the first electrode 13A and the second electrode 13C. The organic compound layer 13B is provided as an organic compound layer common to all the sub-pixels 100. In the example of FIG. 1, the organic compound layer 13B is configured to be capable of emitting white light. However, this does not prohibit that the emission color of the organic compound layer 13B is other than white, and colors such as red, blue, and green may be adopted. That is, the emission color of the organic compound layer 13B may be, for example, any one of white, red, blue and green.

The organic compound layer 13B has a structure in which a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer are laminated in this order from the first electrode 13A toward the second electrode 13C. The structure of the organic compound layer 13B is not limited to this, and layers other than the light emitting layer are provided as needed.

The hole injection layer is a buffer layer for increasing the hole injection efficiency into the light emitting layer and for suppressing leakage. The hole transport layer is for increasing the hole transport efficiency to the light emitting layer. In the light emitting layer, when an electric field is applied, electrons and holes are recombined to generate light. The light emitting layer is an organic light emitting layer containing an organic light emitting material. The electron transport layer is for increasing the electron transport efficiency to the light emitting layer. An electron injection layer may be provided between the electron transport layer and the second electrode 13C. This electron injection layer is for increasing the electron injection efficiency.

(Insulation layer 14)
The insulating layer 14 is formed on the first surface side of the substrate 11. The insulating layer 14 electrically separates each first electrode 13A for each light emitting element 13 (that is, for each sub-pixel). The insulating layer 14 has a plurality of openings 14A corresponding to the sub-pixels 100, and the first surface (the surface facing the second electrode 13C) of the separated first electrode 13A is exposed from the openings 14A. There is. The insulating layer 14 may cover the separated first electrode 13A from the peripheral edge portion of the first surface to the side surface (end surface). In the present specification, the peripheral edge portion of the first surface means a region having a predetermined width from the peripheral edge of the first surface toward the inside.

The insulating layer 14 is made of, for example, an organic material or an inorganic material. The organic material contains, for example, at least one of polyimide and acrylic resin. The inorganic material includes, for example, at least one of silicon oxide, silicon nitride, silicon nitriding and aluminum oxide.

(Protective layer)
The protective layer 15 is provided on the surface (first surface) of the second electrode 13C and covers the light emitting element 13. The thickness of the protective layer 15 is preferably 0.5 μm or more and 2.0 μm or less. When the thickness of the protective layer 15 is within this range, the effect of satisfying the mathematical formulas 7 and 8 described later is enhanced. The thickness of the protective layer 15 is defined as the thickness from the surface of the light emitting element 13 (first surface of the second electrode) to the surface of the protective layer 15 (first surface). The protective layer 15 blocks the light emitting element 13 from the outside air and suppresses the infiltration of moisture from the external environment into the light emitting element 13. Further, when the second electrode 13C is composed of a metal layer, the protective layer 15 may have a function of suppressing oxidation of the metal layer.

The protective layer 15 is made of, for example, an inorganic material. As the inorganic material constituting the protective layer 15, a material having low hygroscopicity is preferable. Specifically, the inorganic material constituting the protective layer 15 is selected from the group consisting of silicon oxide (SiO), silicon nitride (SiN), silicon oxide nitride (SiNO), titanium oxide (TIO) and aluminum oxide (AlO). It is preferable to contain at least one of these. The protective layer 15 may have a single-layer structure, but may have a multi-layer structure when the thickness is increased. This is to relieve the internal stress in the protective layer 15.

(Color filter)
The color filter 17 is provided on the protective layer 15. In the example of FIG. 1, the color filter 17 is provided at a position closer to the first electrode 13A than the lens 18 described later. The color filter 17 is, for example, an on-chip color filter (OCCF). The color filter 17 is formed corresponding to the sub-pixel 100. For example, as shown in the example of FIG. 1, as the color filter 17, a plurality of color type filters (red filter 17R, green filter 17G, and blue filter 17B) can be mentioned. The red filter 17R, the green filter 17G, and the blue filter 17B are provided facing the light emitting element 13 for the red sub-pixel, the light emitting element 13 for the green sub-pixel, and the light emitting element 13 for the blue sub-pixel, respectively. There is. As a result, the white light emitted from each light emitting element 13 in the red sub-pixel 100R, the green sub-pixel 100G, and the blue sub-pixel 100B passes through the red filter 17R, the green filter 17G, and the blue filter 17B, respectively. By doing so, red light, green light, and blue light are emitted from the display surface, respectively.

Note that the example of the color filter 17 shown here is an example, and the type of the color filter 17 is not limited to the combination of three types of red, green, and blue. For example, the type of the color filter 17 may be a combination of four types of white in addition to red, green, and blue. Further, although the case where the color filter 17 is an on-chip color filter is exemplified above, a color filter formed separately may be bonded.

(Array of color filters)
In the examples of FIGS. 1 and 2, the arrangement of the color filters 17 is such that the red filter 17R, the blue filter 17B, and the green filter 17G are repeatedly arranged in this order. In the examples of FIGS. 1, 2A, and 2B, each color filter 17 (red filter 17R, blue filter 17B, and green filter 17G) is formed in a striped shape. In FIG. 1, the red filter 17R, the blue filter 17B, and the green filter 17G are formed in a state where the end faces are in contact with each other, but the red filter 17R, the blue filter 17B, and the green filter 17G may be separated from each other. ..

(lens)
At least one lens 18 is formed corresponding to the sub-pixel 100, and in the example of FIG. 1, one lens 18 is provided on the color filter 17 (on the + Z direction side). When the number of lenses 18 is plurality, it becomes easy to control the light-collecting property of the lenses 18. However, from the viewpoint of maintaining the strength of the lens 18 and preventing the thickness dimension from becoming too small, it is preferable that the number of lenses 18 is 3 or less with respect to one sub-pixel 100.

The bottom surface 18A of the lens 18 is directed toward the opening 14A, and most of the light generated from the light emitting element 13 passes through the color filter 17 and faces the bottom surface 18A side of the lens 18. Then, the traveling direction of the light is adjusted by passing the light through the lens 18. The lens 18 is, for example, an on-chip lens (On Chip Lens: OCL). The lens 18 may be formed of, for example, a thermosetting resin, an ultraviolet curable resin, or the like.

(Lens shape)
The shape of the lens 18 is not particularly limited, and examples thereof include a columnar shape, a frustum shape, and a dome shape. In the example of FIG. 1, the lens 18 has a shape in which the cross section in the XZ plane (here, it may be simply referred to as a cross-sectional shape) has a half-moon shape with respect to the cross-sectional shape. As shown in FIG. 2B, the planar shape of the lens 18 is formed into a rectangular shape. However, this is an example of the shape of the lens 18, and does not limit the shape of the lens 18. The cross-sectional shape of the lens 18 may be, for example, a rectangular shape as shown in FIG. 4 or a trapezoidal shape as shown in FIG. 3C. Further, the planar shape of the lens 18 may be a circular shape, an elliptical shape, a square shape or another polygonal shape, or a chamfered shape. As will be described later, the shape of such a lens 18 may be determined according to various conditions such as a combination of sub-pixels 100.

(Relationship between the bottom surface of the lens and the width of the opening)
In the display device 10 according to the first embodiment, the following formulas 7 and 8 are satisfied with respect to the widths of the bottom surface 18A and the opening 14A of the lens 18.

ΣLR / WR <ΣLB / WB ... (Formula 7)

ΣLG / WG <ΣLB / WB ... (Formula 8)

However, in Equation 7 and Equation 8, WR is the horizontal width of the opening 14A corresponding to the red sub-pixel 100R. The horizontal width of the opening 14A indicates the width in the horizontal cross section of the display device 10 passing through the center of the opening 14A. This also applies to the opening 14A corresponding to the green sub-pixel 100G and the blue sub-pixel 100B, in addition to the red sub-pixel 100R. The horizontal cross section is a cross section when a plane (XZ plane) stretched in the horizontal direction (X-axis direction) of the display device 10 and the thickness direction (Z-axis direction) of the light emitting element 13 is used as a cut surface. ..

ΣLR is the horizontal width (indicated by reference numeral LR in FIG. 1) of the bottom surface 18A of the lens 18 formed corresponding to the red sub-pixel 100R when the first horizontal arrangement number is 1. Become. Further, when the number of first horizontal arrangements is 2 or more, the ΣLR is the horizontal width of each bottom surface 18A of the lenses 18 formed in a state of being arranged horizontally corresponding to the red sub-pixels 100R. The total of LR is shown. The first horizontal arrangement number indicates the number of formations of the lens 18 corresponding to the red sub-pixel 100R along the horizontal direction. For example, when two lenses 18 are formed side by side in the horizontal direction corresponding to the sub-pixel 100R, the number of first horizontal arrangements is 2. The horizontal width of the bottom surface 18A of the lens 18 indicates the width in the horizontal cross section of the display device 10 passing through the center of the bottom surface 18A of the lens 18. This also applies to the lens 18 corresponding to the red sub-pixel 100R, the green sub-pixel 100G, and the blue sub-pixel 100B.

Further, WG is the horizontal width of the opening 14A corresponding to the green sub-pixel 100G.

When the second horizontal arrangement number is 1, the ΣLG is the horizontal width of the bottom surface 18A of the lens 18 formed corresponding to the green sub-pixel 100G (indicated by the reference numeral LG in FIG. 1). .. Further, when the number of second horizontal arrangements is 2 or more, the ΣLG is the horizontal width of each bottom surface 18A of the lenses 18 formed in a state of being arranged horizontally corresponding to the green sub-pixels 100G. The total of LG is shown. The second horizontal arrangement number indicates the number of formations of the lens 18 corresponding to the green sub-pixel 100G along the horizontal direction.

WB is the horizontal width of the opening 14A corresponding to the blue sub-pixel 100B.

When the third horizontal arrangement number is 1, the ΣLB is the horizontal width of the bottom surface 18A of the lens 18 formed corresponding to the blue sub-pixel 100B (indicated by the reference numeral LB in FIG. 1). .. Further, when the number of third horizontal arrangements is 2 or more, the ΣLB is the horizontal width of each bottom surface 18A of the lenses 18 formed in a state of being arranged horizontally corresponding to the blue sub-pixels 100B. The total of LB is shown. The third horizontal arrangement number indicates the number of formations of the lens 18 corresponding to the blue sub-pixel 100B along the horizontal direction.

In the example of FIG. 1, as shown in FIG. 2B, the horizontal width LB of the lens 18 corresponding to the sub-pixel 100B is the width LR of the lens 18 corresponding to the sub-pixel 100R, and the lens 18 corresponding to the sub-pixel 100G. The above equations 7 and 8 are satisfied by making the width LG larger than the width LG.

Equations 7 and 8 are not limited to cases where the widths LR, LG, and LB of the lens 18 are specified. Equations 7 and 8 may be realized by defining the magnitudes of the widths WR, WG, and WB of the openings 14A as shown in FIG. 5A, and the magnitudes of the widths LR, LG, and LB of the lens 18 may be determined. It may be realized in combination. In FIG. 5A, the widths LR, LG, and LB of the lens 18 are the same, and the widths WR and WG of the opening 14A corresponding to the sub-pixels 100R and 100G are larger than the width WB of the opening 14A corresponding to the sub-pixel 100B. An example is shown when it is specified to be large.

(Upper and lower limits of ΣLR / WR, ΣLB / WB and ΣLG / WG)
The lower limit values of ΣLR / WR, ΣLB / WB, and ΣLG / WG are 1, respectively, from the viewpoint of more efficiently exhibiting the light-collecting property of the lens 18.

The upper limit of ΣLR / WR, ΣLB / WB and ΣLG / WG is the viewpoint of reducing the width of the opening 14A while suppressing the influence on the organic compound layer 13B, and the lens 18 while suppressing the influence on the adjacent sub-pixel 100. From the viewpoint of increasing the bottom surface 18A of the above, each is 3.

From the viewpoint of more efficiently suppressing the chromaticity shift, it is more preferable that the above-mentioned values of ΣLB / WB, ΣLG / WG, and ΣLR / WR satisfy the following formula 9 or formula 10.

0.01 <(ΣLB / WB-ΣLR / WR) <0.3 ... (Formula 9)

0.01 <(ΣLB / WB-ΣLG / WG) <0.3 ... (Formula 10)

Further, it is preferable that the display device 10 is satisfied with at least one of the following formula 11 or formula 12.

LB / LR≤2 ... (Formula 11)

LB / LG ≤ 2 ... (Formula 12)

However, in Equation 11 and Equation 12, LB indicates the horizontal width of the bottom surface 18A of the lens 18 formed corresponding to the red sub-pixel 100R as described above. LG indicates the horizontal width of the bottom surface 18A of the lens 18 formed corresponding to the green sub-pixel 100G. LB indicates the horizontal width of the bottom surface 18A of the lens 18 formed corresponding to the blue sub-pixel 100B.

When the display device 10 satisfies at least one of the above formula 11 and the above formula 12, the light from at least one light emitting element 13 of the red sub-pixel 100R or the green sub-pixel 100G corresponds to the blue sub-pixel 100B. It is possible to enhance the effect of suppressing the entry into the lens 18. From the viewpoint of enhancing this effect, it is preferable that both the formula 11 and the formula 12 are satisfied. When both the formula 11 and the formula 12 are satisfied, the light from the light emitting element 13 of the red sub-pixel 100R and the green sub-pixel 100G enters the lens 18 corresponding to the blue sub-pixel 100B. Can be effectively suppressed.

(Number of 1st horizontal arrangement, number of 2nd horizontal arrangement and number of 3rd horizontal arrangement)
Since at least one lens 18 is formed corresponding to each of the sub-pixels 100 (sub-pixels 100R, 100G, 100B) of each color type as described above, the first horizontal arrangement number and the second horizontal arrangement number described above are formed. , The third horizontal arrangement number is a value of 1 or more. In the example of FIG. 1, the number of first horizontal arrangements for the lens 18 corresponding to the sub-pixel 100R is 1. The number of second horizontal arrangements for the lens 18 corresponding to the sub-pixel 100G is 1. Further, the number of third horizontal arrangements of the lens 18 corresponding to the sub-pixel 100B, which will be described later, is 1.

Considering that it is preferable that the number of lenses 18 is 3 or less for one sub-pixel 100 as described above, the number of first horizontal arrangements, the number of second horizontal arrangements, and the number of third horizontal arrangements are three. The following is preferable.

(Distance between the bottom surface of the lens and the surface of the first electrode)
In the display device 10, the separation distance from the surface of the first electrode 13A located at the opening 14A corresponding to each sub-pixel 100 to the bottom surface 18A of the lens 18 directed to the opening 14A (first electrode 13A). The separation distance WH) between the lens 18 and the bottom surface of the lens 18 is preferably 0.5 μm or more and 5.0 μm or less. This indicates that it is more strongly required to suppress the chromaticity shift when the separation distance WH is in such a range. Further, when the separation distance WH is in such a range, it becomes easy to make the display device 10 a micro display.

[1-2 Manufacturing method of display device according to the first embodiment]
Hereinafter, an example of the manufacturing method of the display device 10 according to the embodiment of the present disclosure will be described. However, the case where the cross-sectional shape of the lens 18 in the display device 10 is trapezoidal will be described as an example.

First, the insulating layer 14 and the organic compound layer 13B having the first electrode 13A and the opening 14A formed on the first surface of the substrate 11 by using, for example, a thin film forming technique, a photolithography technique, an etching technique, a sputtering technique, or the like. , The second electrode 13C is formed. The opening 14A is formed with a pattern corresponding to the sub-pixel 100 of each color. Further, the protective layer 15 and the color filter 17 are formed by appropriately using a CVD method, a vapor deposition method, a photolithography method, or the like. The color filter 17 is formed according to the layout of the sub-pixel 100. Further, in the example of FIG. 3, the red filter 17R, the green filter 17G, and the blue filter 17B are formed in a striped shape.

The lens 18 is formed on the surface of the color filter 17. The method of forming the lens 18 is not particularly limited. For example, as shown in FIG. 3A, the resin material forming the lens 18 is applied on the surface of the color filter 17 to form the resin layer 30. A resist 31 is provided on the resin layer 30 so as to have a pattern corresponding to the formation position of the lens 18 (FIG. 3B). Then, for example, by applying an etching technique or the like, a lens 18 is formed on the color filter 17 as shown in FIG. 3C (etchback method). As a result, the display device 10 is obtained. The method of forming the lens 18 shown here is an example. For example, in addition to the etchback method, an on-chip microlens (OCL) forming method such as a melting method may be applied.

[1-3 Action effect]
The display device is required to suppress the chromaticity shift between the case where the front direction is the line-of-sight direction and the case where the diagonal direction is the line-of-sight direction. The chromaticity deviation is the chromaticity in the front direction and the diagonal when comparing the chromaticity when the front direction is the line-of-sight direction and the chromaticity when the diagonal direction is the line-of-sight direction with respect to the display area of the display device. Indicates the difference (deviation) from the chromaticity in the direction.

By the way, generally, as for the relationship between the viewing angle and the light intensity in the display device, as shown in the simulation example (FIG. 15B) described later, the light intensity in the front direction and the direction in which the degree of inclination is large (based on the front direction). There is a large difference in the relative ratio (standardized intensity) of light intensity in the direction with a large azimuth angle (direction with a large viewing angle) between blue light and red light, that is, with the viewing angle characteristics of blue light. The viewing angle characteristics of red light are different. The viewing angle characteristics of the relationship between blue light and green light are different as in the relationship between blue light and red light.

In this regard, according to the display device 10 according to the first embodiment, when the mathematical formulas 1 and 2 are satisfied, the viewing angle characteristic of the blue light becomes red as shown in the simulation example (FIG. 15A) described later. It is close to the viewing angle characteristics of light and green light, and the chromaticity shift is reduced. According to the display device 10 according to the first embodiment, with respect to the horizontal direction (X-axis direction) of the display area 110A, chromaticity deviation is unlikely to occur even when the direction in which the inclination angle with respect to the front direction is large is the line-of-sight direction. The viewing angle characteristics in the horizontal direction can be improved, and a wide viewing angle in the horizontal direction can be realized.

Further, according to the display device 10, the brightness in the front direction can be improved by satisfying the formula 1 and the formula 2.

[1-4 Modification Example]
(Modification 1) (Vertical direction)
In the display device 10 of the first embodiment, the relationship between the width 18A of the lens 18 and the width of the opening 14A is defined in the horizontal direction. The display device 10 of the first embodiment is not limited to this, and the relationship between the width 18A of the lens 18 and the width of the opening 14A may be defined in the vertical direction (modification example 1).

(Relationship between the bottom surface of the lens and the width of the opening)
In the display device 10 according to the first modification, the following

mathematical formulas

13 and 14 are satisfied with respect to the widths of the bottom surface 18A and the opening 14A of the lens 18.

ΣLvR / WvR <ΣLvB / WvB ... (Formula 13)

ΣLvG / WvG <ΣLvB / WvB ... (Formula 14)

However, in the

above equations

13 and 14, WvR is the vertical width of the opening 14A corresponding to the red sub-pixel 100R, as also shown in FIG. 2B. The vertical width of the opening 14A indicates the width in the vertical cross section of the display device 10 passing through the center of the opening 14A. This also applies to the opening 14A corresponding to the green sub-pixel 100G and the blue sub-pixel 100B, in addition to the red sub-pixel 100R. The vertical cross section is a cross section when a plane (YZ plane) stretched in the vertical direction (Y-axis direction) of the display device 10 and the thickness direction (Z-axis direction) of the light emitting element 13 is used as a cut surface.

ΣLvR is the vertical width of the bottom surface 18A of the lens 18 formed corresponding to the red sub-pixel 100R (indicated by the reference numeral LvR in FIG. 2B) when the number of first vertical arrangements is 1. be. ΣLvR is the sum of the vertical widths of the bottom surfaces 18A of the lenses 18 formed in a vertically aligned state corresponding to the red sub-pixels 100R when the number of first vertical arrangements is 2 or more. Is shown. However, the first vertical arrangement number indicates the number of formations of the lens 18 corresponding to the red sub-pixel 100R along the vertical direction. The vertical width of the bottom surface 18A of the lens 18 indicates the width in the vertical cross section of the display device 10 passing through the center of the bottom surface 18A of the lens 18. This also applies to the lens 18 corresponding to the red sub-pixel 100R, the green sub-pixel 100G, and the blue sub-pixel 100B.

WvG is the vertical width of the opening 14A corresponding to the green sub-pixel 100G.

ΣLvG is the vertical width of the bottom surface 18A of the lens 18 formed corresponding to the green sub-pixel 100G (indicated by the reference numeral LvG in FIG. 2B) when the number of second vertical arrangements is 1. be. ΣLvG is the sum of the vertical widths of the bottom surfaces of the lenses 18 formed in a vertically aligned state corresponding to the green sub-pixels 100G when the number of second vertical arrangements is 2 or more. show. However, the second vertical arrangement number indicates the number of formations of the lens 18 corresponding to the green sub-pixel 100G along the vertical direction.

WvB is the vertical width of the opening 14A corresponding to the blue sub-pixel 100B.

ΣLvB is the vertical width of the bottom surface 18A of the lens 18 formed corresponding to the blue sub-pixel 100B (indicated by the reference numeral LvB in FIG. 2B) when the third vertical arrangement number is 1. be. ΣLvB is the sum of the vertical widths of the bottom surfaces 18A of the lenses 18 formed in a vertically aligned state corresponding to the blue sub-pixels 100B when the number of third horizontal arrangements is 2 or more. Is shown. However, the third vertical arrangement number indicates the number of formations of the lens 18 corresponding to the blue sub-pixel 100B along the vertical direction.

In the example of FIG. 1, the vertical width LvB of the lens 18 corresponding to the sub-pixel 100B is made larger than the width LvR of the lens 18 corresponding to the sub-pixel 100R and the width LvG of the lens 18 corresponding to the sub-pixel 100G. The

above equations

13 and 14 are satisfied.

The

formulas

13 and 14 are not limited to the case where the widths LvR, LvG, and LvB of the lens 18 are specified.

Equations

13 and 14 may be realized by defining the magnitudes of the widths WvR, WvG, and WvB of the opening 14A as shown in FIG. 5A, and the magnitudes of the widths LvR, LvG, and LvB of the lens 18 may be determined. It may be realized in combination. In FIG. 5A, the widths LvR, LvG, and LvB of the lens 18 are the same, and the widths WvR and WvG of the opening 14A corresponding to the sub-pixels 100R and 100G are larger than the width WvB of the opening 14A corresponding to the sub-pixel 100B. An example is shown where it is specified to be large.

(Upper and lower limits of ΣLvR / WvR, ΣLvB / WvB and ΣLvG / WvG)
The lower limit of ΣLvR / WvR, ΣLvB / WvB and ΣLvG / WvG is 1 as in the case of the lower limit of ΣLR / WR, ΣLB / WB and ΣLG / WG, respectively.

The upper limit values of ΣLvR / WvR, ΣLvB / WvB and ΣLvG / WvG are 3 as in the case of the upper limit values of ΣLR / WR, ΣLB / WB and ΣLG / WG, respectively.

From the viewpoint of more efficiently suppressing the vertical chromaticity shift of the display area, the above-mentioned values of ΣLvB / WvB, ΣLvG / WvG, and ΣLvR / WvR may satisfy the following formula 15 or formula 16. preferable.

0.01 <(ΣLvB / WvB-ΣLvR / WvR) <0.3 ... (Formula 15)

0.01 <(ΣLvB / WvB-ΣLvG / WvG) <0.3 ... (Formula 16)

Further, it is preferable that the display device 10 is satisfied with at least one of the following formula 17 or formula 18.

LvB / LvR≤2 ... (Formula 17)

LvB / LvG≤2 ... (Formula 18)

However, in Equation 17 and Equation 18, LvB indicates the vertical width of the bottom surface 18A of the lens 18 formed corresponding to the red sub-pixel 100R as described above. LvG indicates the vertical width of the bottom surface 18A of the lens 18 formed corresponding to the green subpixel 100G. LvB indicates the vertical width of the bottom surface 18A of the lens 18 formed corresponding to the blue sub-pixel 100B.

When the display device 10 satisfies at least one of the

above formula

17 or 18, the light from at least one light emitting element 13 of the red sub-pixel 100R or the green sub-pixel 100G corresponds to the blue sub-pixel 100B. It is possible to suppress the entry into the lens 18. From the viewpoint of enhancing this effect, it is preferable that both the formula 11 and the formula 12 are satisfied. When both the formula 11 and the formula 12 are satisfied, the light from the light emitting element 13 of the red sub-pixel 100R and the green sub-pixel 100G enters the lens 18 corresponding to the blue sub-pixel 100B. Can be effectively suppressed.

(Number of first vertical arrangements, number of second vertical arrangements and number of third vertical arrangements)
Since at least one lens 18 is formed corresponding to each of the sub-pixels 100 (sub-pixels 100R, 100G, 100B) of each color type as described above, the first vertical arrangement number and the second vertical arrangement number described above are formed. , The third vertical arrangement number is a value of 1 or more. In the example of FIG. 1, the number of first vertical arrangements for the lens 18 corresponding to the sub-pixel 100R is 1. The number of second vertical arrangements for the lens 18 corresponding to the sub-pixel 100G is 1. Further, the number of third vertical arrangements of the lens 18 corresponding to the sub-pixel 100B, which will be described later, is 1.

Considering that it is preferable that the number of lenses 18 is 3 or less with respect to one sub-pixel 100 as described above, the number of first vertical arrangements, the number of second vertical arrangements, and the number of third vertical arrangements are three. The following is preferable.

For example, FIG. 5B shows an example in which the number of first vertical arrangements, the number of second vertical arrangements, and the number of third vertical arrangements are three. In this case, for the three lenses 18 arranged in the vertical direction, the relationship between the total width of the bottom surface 18A and the width of the opening 14A satisfies the conditions of the

above formulas

13 and 14.

According to the display device 10 according to the first modification, the chromaticity shift is less likely to occur in the vertical direction (Y-axis direction) of the display area 110A even when the direction in which the tilt angle with respect to the front direction is large is the line-of-sight direction. It is possible to improve the viewing angle characteristics and realize a wide viewing angle in the vertical direction.

(Modification 2)
Regarding the layout of the sub-pixel 100 of the display device 10 according to the first embodiment, in the example of FIG. 1, the sub-pixels 100R, 100B, and 100G arranged in the horizontal direction form a pixel unit, but this is a sub-pixel. It is an example of 100. The layout of the sub-pixel 100 is not limited to this.

As the layout of the sub-pixel 100, as shown in FIG. 6B, two sub-pixels 100B, a combination of one sub-pixel 100R and 100G, respectively, and each sub-pixel 100 may be arranged squarely. In this case, the sub-pixels 100B may be arranged side by side as shown in FIG. 6B, or may be arranged so as to avoid the positions where they are next to each other as shown in FIG. 7A. Further, as shown in FIG. 6A, the sub-pixels 100R and 100G may be shaped like a square, and the sub-pixels 100B may be shaped like a rectangle, and these may be combined. Further, as shown in FIGS. 7B and 7C, the sub-pixels 100R, 100G, and 100B may be arranged in a delta shape.

Even in such a layout of the sub-pixel 100, the field of view is set so that the width of the bottom surface 18A of the lens 18 and the width of the opening 14A satisfy the above-mentioned predetermined conditions in both the horizontal direction and the vertical direction. The angle characteristics can be improved.

In FIGS. 6A and 7B, the width LB of the bottom surface 18A of the lens 18 is set to a value larger than the width LR and LG, and the width LvB of the bottom surface 18A of the lens 18 is set to a value larger than the width LvR and LvG. The above-mentioned predetermined conditions (mathematical expressions 7, 8, 13, 14) are satisfied in both the horizontal direction and the vertical direction.

In FIGS. 6B, 7A, and 7C, the width WB of the opening 14A is set to a value smaller than the width WR and WG, and the width WvB of the bottom surface 18A of the lens 18 is set to a value smaller than the width WvR and WvG. , The above conditions (formulas 7, 8, 13, 14) are satisfied in both the horizontal direction and the vertical direction.

With such a display device, the viewing angle characteristics are good in both the horizontal direction and the vertical direction.

(Modification 3)
In the display device 10, as shown in FIG. 8A, the color filter 17 may be provided at a position farther from the first electrode 13A than the lens 18. In FIG. 8A, reference numeral 20 is a flattening layer. The flattening layer 20 can be formed of a resin or the like. This also applies to FIG. 8B.

(Modification example 4)
In the display device 10, a plurality of color filters 17 may be provided in each sub-pixel 100. In this case, as shown in FIG. 8B, in each sub-pixel 100, the color filter 17 may be provided at both positions farther and closer to the first electrode 13A than the lens 18.

(Modification 5)
In the display device 10 shown in the example of FIG. 1, the dimensions of the red filter 17R, the green filter 17G, and the blue filter 17B formed as the color filter 17 corresponding to the sub-pixels corresponding to the respective color types are substantially the same. ing. This example is an example of the sub-pixel 100, and the display device 10 according to the first embodiment is not limited to this. In the display device 10, as shown in FIG. 12, the dimensions of the red filter 17R, the green filter 17G, and the blue filter 17B may be different between the sub-pixels 100 of different color types. From the viewpoint of reducing the chromaticity deviation, it is preferable that the horizontal width of the blue filter 17B is narrower than the horizontal width of the red filter 17R and the horizontal width of the green filter 17G. When the color filter 17 of the display device 10 has such a configuration, the intensity of the light in the diagonal direction with respect to the light in the front direction is relatively weakened with respect to the blue light, and the viewing angle characteristics of the blue light are red light and green light. The effect of facilitating close proximity to the viewing angle characteristics of is obtained.

(Modification 6)
As shown in FIG. 13, the display device 10 according to the first embodiment includes filters of a plurality of different color types as color filters 17 corresponding to the sub-pixels 100 corresponding to the respective color types, and adjacent to each other. The black matrix layer 19 may be provided between or at the boundary between filters of different color types. In the example of FIG. 13, in the display device 10, the red filter 17R, the green filter 17G, and the blue filter 17B are provided as filters of different color types corresponding to the sub-pixels 100 of different color types. In the display device 10, the black matrix layer 19 is provided at least on the boundary between the red filter 17R and the blue filter 17B and on the boundary between the green filter 17G and the blue filter 17B. The black matrix layer 19 may be, for example, a black resin film having an optical density of 1 or more mixed with a black colorant. Specifically, as the material of the black matrix layer 19, a black polyimide resin or the like can be exemplified.

As described above, according to the display device 10 of the modified example 8, by further providing the black matrix layer 19, the blue light directed in the oblique direction is adjusted, and the viewing angle characteristic can be improved.

(Modification 7)
In the display device 10 illustrated in FIG. 1, the refractive powers of the lenses 18 provided in the red sub-pixel 100R, the green sub-pixel 100G, and the blue sub-pixel 100B are substantially the same as each other. The display device 10 is not limited to this example. In the display device 10, the lens 18 formed corresponding to the blue sub-pixel 100B corresponds to the lens 18 formed corresponding to the red sub-pixel 100R and the lens 18 formed corresponding to the green sub-pixel 100G. The refractive power may be larger than 18. By using such a lens 18, the viewing angle characteristic for blue light can be brought into a state close to the viewing angle characteristic for red light and green light. Further, according to the display device 10 according to the modification 9, the front luminance can be improved. Here, the refractive power of the lens 18 indicates the degree to which light is guided in the front direction. Therefore, the higher the refractive power of the lens 18, the easier it is for light to be guided in the front direction. The lens 18 formed corresponding to the blue sub-pixel 100B has a higher refractive power than the lens 18 formed corresponding to the red sub-pixel 100R and the lens 18 formed corresponding to the green sub-pixel 100G. The method of making the relative height is not particularly limited. For example, as the method, the lens 18 formed corresponding to the blue sub-pixel 100B is formed corresponding to the lens 18 formed corresponding to the red sub-pixel 100R and the green sub-pixel 100G. It can be mentioned that the height is higher than that of the lens 18 (FIG. 14).

[2 Second Embodiment]
[2-1 Display device configuration]
FIG. 9 is a cross-sectional view showing a configuration example of the display device 10 according to the second embodiment. The display device 10 according to the second embodiment includes a substrate 11, a plurality of light emitting elements 13, a reflection wall 21, a protective layer 15, a plurality of color filters 17, and a lens 18. The display device 10 according to the second embodiment shown in the example of FIG. 9 has the same configuration as the display device 10 according to the first embodiment, except that the insulating layer 14 is omitted and the reflection wall 21 is provided. ..

(Reflective wall)
The reflective wall 21 extends from between the light emitting elements 13 adjacent to each other with the first main surface of the substrate 11 as the base end in the thickness direction (+ Z direction) of the light emitting element 13. Similar to the insulating layer 14, the reflective wall 21 electrically separates the first electrode 13A for each light emitting element 13 (that is, for each sub-pixel). Further, the reflective wall 21 may be covered from the peripheral edge portion of the first surface of the separated first electrode 13A to the side surface (end surface), similarly to the insulating layer 14.

The reflective wall 21 forms a wall surface 22 around the light emitting region of each light emitting element 13 corresponding to each sub-pixel 100. When the reflective wall 21 is formed between the adjacent red sub-pixels 100R and the blue sub-pixels 100B, the reflective wall 21 is located on the surface located on the red sub-pixel 100R side and on the wall surface 22R and the blue sub-pixel 100B side. The wall surface 22B is formed on the surface to be located. Further, when the reflective wall 21 is formed between the adjacent blue sub-pixels 100B and the green sub-pixels 100G, the reflective wall 21 is a surface located on the blue sub-pixel 100B side and is located on the wall surface 22B and the green sub-pixel 100G side. The wall surface 22G is formed on the surface located at. When the reflective wall 21 is formed between the adjacent red sub-pixel 100R and the green sub-pixel 100G, the reflective wall 21 is located on the surface located on the red sub-pixel 100R side and is located on the wall surface 22R and the green sub-pixel 100G side. The wall surface 22G is formed on the surface to be located. When the color types are not particularly distinguished, the

wall surface

22R, 22G, and 22B may be collectively referred to as the wall surface 22.

The wall surface 22B is formed around the light emitting region SB of the light emitting element 13 corresponding to the green sub-pixel 100B (in the example of FIG. 9, both side edges of the light emitting region SB separated in the horizontal direction). Similarly, the wall surfaces 22R and 22G are around the light emitting regions SR and SG of the light emitting element 13 corresponding to the red and

green subpixels

100R and 100G, respectively (in the example of FIG. 9, the light emitting regions SR and SG are horizontal, respectively). Formed on both sides separated in the direction).

In the example of FIG. 9, the shape of the reflective wall 21 is formed so that the horizontal cross section (cross section in the XZ plane) is trapezoidal, but this particularly limits the shape of the reflective wall 21. is not. The shape of the reflective wall 21 may be such that the horizontal cross section is rectangular.

The material of the reflective wall 21 is not particularly limited as long as it has light reflection and insulating properties, and silicon oxide (SiO), silicon oxynitride (SiON), and the like can be exemplified.

In the display device 10, the bottom surface 18A of the lens 18 is directed to the surface side (first surface side) of the second electrode 13C of the light emitting element 13, and the light generated by the light emitting element 13 in each sub-pixel 100. A part of the light can be reflected by the wall surface 22 and directed toward the lens 18.

(Relationship between the width of the bottom of the lens and the width of the tip of the wall surface)
In the display device 10, the following

mathematical formulas

19 and 20 are satisfied with respect to the widths of the bottom surface 18A of the lens 18 and the tip end portion 24 of the wall surface 22.

ΣLR / WrR <ΣLB / WrB ... (Formula 19)

ΣLG / WrG <ΣLB / WrB ... (Formula 20)

However, in Equation 19 and Equation 20, WrR is the horizontal width of the tip portion 24 of the wall surface 22R corresponding to the red sub-pixel 100R. WrG is the horizontal width of the tip portion 24 of the wall surface 22G corresponding to the green sub-pixel 100G. WrB is the horizontal width of the tip portion 24 of the wall surface 22B corresponding to the blue sub-pixel 100B. The horizontal width of the tip portion 24 of the wall surface 22R means the width in the horizontal cross section (cross section in the XZ plane) of the display device 10 passing through the center of the light emitting region SR. This also applies to the opening 14A corresponding to the green sub-pixel 100G and the blue sub-pixel 100B, in addition to the red sub-pixel 100R.

The ΣLR, ΣLG and ΣLB in the

formulas

19 and 20 are the same as the ΣLR, ΣLG and ΣLB described in the first embodiment, respectively.

In the example of the second embodiment shown in FIG. 9, the insulating layer 14 is omitted, but the insulating layer 14 may be further formed as in the first embodiment. In this case, the display device 10 may be a combination of the first embodiment and the second embodiment.

In the above, the

above equations

19 and 20 are defined for the horizontal width of the bottom surface 18A of the lens 18 and the tip portion 24 of the wall surface 22, but the vertical width of the bottom surface 18A of the lens 18 and the tip end portion 24 of the wall surface 22. May be specified in the same manner.

[2-2 action effect]
According to the display device 10 according to the second embodiment, when the equation 19 and the equation 20 are satisfied, the viewing angle characteristic of the blue light becomes red light as in the display device 10 according to the first embodiment. It is close to the viewing angle characteristics of green light and the chromaticity deviation is reduced. According to the display device 10 according to the second embodiment, the viewing angle characteristic in the horizontal direction can be improved and the wide viewing angle in the horizontal direction can be realized, as in the first embodiment.

[3 Third Embodiment]
[3-1 Display device configuration]
FIG. 10 is a cross-sectional view showing a configuration example of the display device 10 according to the third embodiment. The display device 10 according to the third embodiment includes a substrate 11, a reflector 23, a plurality of light emitting elements 13, an insulating layer 14, a protective layer 15, a plurality of color filters 17, and a lens 18. .. The display device 10 according to the third embodiment shown in the example of FIG. 10 has the same configuration as the display device 10 according to the first embodiment, except that the reflector 23 is provided below the light emitting element 13.

(Reflector 23)
The reflector 23 is provided at a predetermined position below the light emitting element 13 according to the sub-pixel 100. In the example of FIG. 10, it is provided in the substrate 11. The reflector 23 is formed of a material having light reflectivity.

In the third embodiment, the reflector 23 and the second electrode 13C form a resonator structure in each sub-pixel 100. The resonator structure resonates, emphasizes, and emits light having a specified wavelength. Specifically, in the sub-pixel 100R, the resonator structure resonates and emphasizes the red light contained in the white light generated in the organic compound layer 13B, and emits it to the outside. In the sub-pixel 100G, the resonator structure resonates and emphasizes the green light contained in the white light generated in the organic compound layer 13B, and emits it to the outside. In the sub-pixel 100G, the resonator structure resonates and emphasizes the blue light contained in the white light generated in the organic compound layer 13B, and emits it to the outside.

The optical path length (optical distance) between the reflector 23 and the second electrode 13C is set according to the light of the specified wavelength to be resonated. More specifically, in the resonator structure of the sub-pixel 100R, the optical path length between the reflector 23 and the second electrode 13C is set so that red light resonates. In the resonator structure of the sub-pixel 100G, the optical path length between the reflector 23 and the second electrode 13C is set so that green light resonates. In the resonator structure 102B, the optical path length between the reflector 23 and the second electrode 13C is set so that blue light resonates.

In the display device 10, the following

mathematical formulas

21 and 22 are satisfied with respect to the widths of the bottom surface 18A of the lens 18 and the reflector 23.

ΣLR / WbR <ΣLB / WbB ... (Formula 21)

ΣLG / WbG <ΣLB / WbB ... (Formula 22)

However, in

Equations

21 and 22, WbR is the horizontal width of the reflector 23 corresponding to the red sub-pixel 100R, and WbG is the horizontal width of the reflector 23 corresponding to the green sub-pixel 100G. WbB is the horizontal width of the reflector 23 corresponding to the blue sub-pixel 100B. The horizontal width of the reflector 23 corresponding to the red sub-pixel 100R indicates the width in the horizontal cross section (cross section in the XZ plane) of the display device 10 passing through the center of the light emitting region SR. This also applies to the reflector 23 corresponding to the green sub-pixel 100G and the blue sub-pixel 100B, in addition to the red sub-pixel 100R.

The ΣLR, ΣLG and ΣLB in the

formulas

(Distance between lens and reflector)
In the display device 10, the separation distance BH from the surface 23A of the reflector 23 corresponding to each sub-pixel 100 to the bottom surface 18A of the lens 18 is preferably 0.5 μm or more and 5.0 μm or less. It is more preferably 5 μm or more and 2.0 μm or less. When the separation distance BH is in such a range, it becomes easy to use the display device 10 as a micro display. Further, this indicates that, as in the first embodiment, it is more strongly required to suppress the chromaticity shift when the separation distance BH is in such a range.

In the above, the

above equations

21 and 22 are defined for the horizontal width of the bottom surface 18A of the lens 18 and the reflector 23, but the vertical width of the bottom surface of the lens 18 and the reflector 23 is also defined in the same manner. good.

[3-2 Action / Effect]
According to the display device 10 according to the third embodiment, when the formula 21 and the formula 22 are satisfied, the viewing angle characteristic of the blue light becomes the red light as in the display device 10 according to the first embodiment. It is close to the viewing angle characteristics of green light and the chromaticity deviation is reduced. According to the display device 10 according to the third embodiment, the viewing angle characteristic in the horizontal direction can be improved and the wide viewing angle in the horizontal direction can be realized, as in the first embodiment.

[4 Fourth Embodiment]
[4-1 Display device configuration]
FIG. 11 is a cross-sectional view showing a configuration example of the display device 10 according to the fourth embodiment. The display device 10 according to the fourth embodiment has the same configuration as the display device 10 according to the first embodiment, except that the shape of the first electrode is curved. In the display device 10 according to the fourth embodiment, the surface of the first electrode 13A on the first main surface side forms a concave curved surface. Further, in this case, the first electrode 13A is preferably a layer having light reflectivity.

[4-2 Action / Effect]
According to the display device 10 according to the fourth embodiment, the surface of the first electrode 13A on the first main surface side forms a concave curved surface, so that the first of the light generated from the light emitting element 13 is formed. The light reflected by the electrode 13A can be easily collected, and the difference in viewing angle characteristics of red, blue, and green can be reduced. Further, according to the display device 10 according to the fourth embodiment, the front luminance can be improved.

[5 Simulation example]
[5-1 Example of lens bottom width and opening width (first simulation)]
A simulation example defining the relationship between the width of the bottom surface of the lens 18 and the width of the opening 14A in the display device 10 will be described with reference to FIGS. 15A and 15B. FIG. 15A shows the results of simulation under the condition that the relationship between the horizontal width of the bottom surface of the lens 18 and the horizontal width of the opening 14A in the display device 10 according to the first embodiment satisfies Equations 1 and 2. It is a figure which shows. FIG. 15B shows a display device (comparative display) having the same configuration as the display device 10 according to the first embodiment, except that the width of the bottom surface of the lens 18 and the width of the opening 14A are the same for the sub-pixels 100 of each color. It is a figure which shows the result of the simulation in (called a device). Regarding the display device 10, the layout pattern of the sub-pixels 100 (100R, 100B, 100G) is a pattern (delta shape) shown in FIG. 7B, and the lens 18 has a dome shape, and the lens 18 has a dome shape. It is formed in a circular shape in the plan view of the above, and the case where the opening 14A has a circular shape is adopted.

In the simulation, the relationship between the horizontal viewing angle [degree] and the light intensity is determined for each of the red, blue, and green color types on the display device 10, and the light at the viewing angle of 0 ° (0 [degree]) is determined. It was carried out by determining the relative light intensity (standardized intensity) at each viewing angle [degree] with the intensity as a reference.

The results of the simulation are as shown in FIGS. 15A and 15B. The graphs of FIGS. 15A and 15B are graphs based on the relationship between the viewing angle and the normalized intensity, with the viewing angle as the horizontal axis and the normalized intensity as the vertical axis. In the graphs shown in FIGS. 15A and 15B, with respect to the horizontal axis, the coordinates are defined so that the viewing angle increases in the left-right direction with the position of the viewing angle 0 ° (0 [degree]) as the center of the horizontal axis. .. In FIGS. 15A and 15B, the graph E (B) shown by the solid line is a graph showing the relationship between the viewing angle and the normalized intensity of blue light. The graph E (R) shown by the alternate long and short dash line is a graph showing the relationship between the viewing angle and the normalized intensity of red light. The graph E (G) shown by the broken line is a graph showing the relationship between the viewing angle and the normalized intensity of green light. This also applies to FIGS. 16A, 16B and 17 showing the results of the second simulation described later.

From the simulation results shown in FIGS. 15A and 15B, a graph for blue light (graph E (B) shown by a solid line), a graph for red light (graph E (R) shown by a alternate long and short dash line), and a graph for blue light. When comparing the consistency with (graph E (B) shown by a broken line),
In the display device 10 according to the first embodiment, since the graph E (B) is closer to the graphs E (R) and E (G) than the comparison display device, the first embodiment It was confirmed that the display device 10 according to the above has the viewing angle characteristics of red, blue, and green closer to those of the display device for comparison. That is, it was confirmed that the display device 10 according to the first embodiment can suppress the color shift between the case where the display device is viewed from an oblique direction and the case where the display device is viewed from the front direction.

[5-2 Example of the width of the bottom surface of the lens and the separation distance of the first electrode (second simulation)]
The separation distance WH between the bottom surface of the lens 18 and the first electrode 13A varies depending on the thickness of the protective layer 15. Therefore, a simulation was performed for the difference in viewing angle characteristics of red, blue, and green according to the difference in the thickness of the protective layer 15. As the display device 10, the same display device as the comparative display device used in the first simulation was adopted except that the lens 18 was omitted. Further, as the protective layer 15, a layer made of SiN was adopted. As the thickness of the protective layer 15, 0.5 μm, 1.0 μm, and 2.0 μm were adopted.

Similar to the first simulation, the simulation was carried out by defining the relationship between the viewing angle and the normalized intensity for red, blue and green. The results of the simulation are as shown in FIGS. 16A, 16B, and 17. Note that FIG. 16A is a diagram showing the results of simulation when the thickness of the protective layer 15 is 0.5 μm. FIG. 16B is a diagram showing the results of simulation when the thickness of the protective layer 15 is 1.0 μm. FIG. 17 is a diagram showing the results of simulation when the thickness of the protective layer 15 is 2.0 μm.

From the simulation results of FIGS. 16A, 16B, and 17, when the thickness of the protective layer 15 is small, the graph E (B) is significantly different from the graphs E (R) and E (G). , Red, blue and green were confirmed to have a large difference in viewing angle characteristics. From this, it was confirmed that the smaller the separation distance WH between the bottom surface of the lens 18 and the first electrode 13A, the stronger the consideration for chromaticity deviation is required.

[6 Application example]
(Electronics)
The display device 10 according to each modification from the first embodiment to the fourth embodiment and the first embodiment described above may be provided in various electronic devices. In particular, high resolution is required such as an electronic viewfinder or a head-mounted display of a video camera or a single-lens reflex camera, and it is preferable to prepare for a magnified use near the eyes.

(Specific example 1)
FIG. 18A is a front view showing an example of the appearance of the digital still camera 310. FIG. 18B is a rear view showing an example of the appearance of the digital still camera 310. This digital still camera 310 is of an interchangeable lens type single-lens reflex type, has an interchangeable shooting lens unit (interchangeable lens) 312 in the center of the front of the camera body (camera body) 311 and is on the left side of the front. It has a grip portion 313 for the photographer to grip.

A monitor 314 is provided at a position shifted to the left from the center of the back of the camera body 311. An electronic viewfinder (eyepiece window) 315 is provided on the upper part of the monitor 314. By looking into the electronic viewfinder 315, the photographer can visually recognize the optical image of the subject guided from the photographing lens unit 312 and determine the composition. As the electronic viewfinder 315, any one of the display devices 10 according to the above-described embodiment and modification can be used.

(Specific example 2)
FIG. 19 is a perspective view showing an example of the appearance of the head-mounted display 320. The head-mounted display 320 has, for example, ear hooks 322 for being worn on the user's head on both sides of the eyeglass-shaped display unit 321. As the display unit 321, any one of the display devices 10 according to the above-described embodiment and modification can be used.

(Specific example 3)
FIG. 20 is a perspective view showing an example of the appearance of the television device 330. The television device 330 has, for example, a video display screen unit 331 including a front panel 332 and a filter glass 333, and the video display screen unit 331 is a display device 10 according to the above-described embodiment and modification. It is composed of any of.

Although the first to third embodiments and variations thereof of the present disclosure have been specifically described above, the present disclosure describes the above-mentioned first to third embodiments and modifications thereof. Not limited to examples, various modifications based on the technical idea of the present disclosure are possible.

For example, the configurations, methods, processes, shapes, materials, numerical values, etc. given in the above-mentioned first to third embodiments and variations thereof are merely examples, and different configurations are required as necessary. , Methods, processes, shapes, materials, numerical values, etc. may be used.

The configurations, methods, processes, shapes, materials, numerical values, etc. of the above-mentioned first to third embodiments and their modifications can be combined with each other as long as they do not deviate from the gist of the present disclosure.

Unless otherwise specified, the materials exemplified in the above-mentioned first to third embodiments and their modifications can be used alone or in combination of two or more.

The present disclosure may also adopt the following configuration.
(1) A plurality of sub-pixels that form a pixel unit and correspond to at least red, green, and blue color types.
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A lens formed at least one corresponding to each of the sub-pixels is provided.
Each of the light emitting elements is provided with an insulating layer that covers the peripheral edge of the first electrode and forms an opening corresponding to each of the sub-pixels on the first electrode.
The following

formulas

23 and 24 are satisfied.
Display device.

ΣLR / WR <ΣLB / WB ... (Formula 23)

ΣLG / WG <ΣLB / WB ... (Formula 24)

However, in the formula 23 and the formula 24, the WR is the horizontal width of the opening corresponding to the red sub-pixel, and is along the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations is the first horizontal arrangement number, the ΣLR is the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. When the number of the first horizontal arrangements is 2 or more, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels is shown.
The WG is the horizontal width of the opening corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In addition, if the number of front second horizontal arrangements is 1, the ΣLG has a horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second horizontal arrangements is 2 or more. For example, the total horizontal width of the bottom surface of each of the lenses formed in a horizontally aligned state corresponding to the green sub-pixel is shown.
The WB is the horizontal width of the opening corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. In addition, if the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. For example, the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the blue sub-pixels is shown.

(2) The following formulas 25 and 26 are satisfied.
The display device according to (1) above.

ΣLvR / WvR <ΣLvB / WvB ... (Formula 25)

ΣLvG / WvG <ΣLvB / WvB ... (Formula 26)

However, in the formula 3 and the formula 4, the WvR is the vertical width of the opening corresponding to the red sub-pixel, and is along the vertical direction of the lens corresponding to the red sub-pixel. When the number of formations is the number of first vertical arrangements, the ΣLvR is the vertical width of the bottom surface of the lens formed corresponding to the red sub-pixels if the number of first vertical arrangements is 1. When the number of the first vertical arrangements is 2 or more, the total vertical width of each bottom surface of the lenses formed in a vertically aligned state corresponding to the red sub-pixels is shown.
The WvG is the vertical width of the opening corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the vertical direction is defined as the second vertical arrangement number. In addition, if the number of front second vertical arrangements is 1, the ΣLvG has a vertical width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second vertical arrangements is 2 or more. For example, the total vertical width of the bottom surface of each of the lenses formed in a vertically aligned state corresponding to the green sub-pixel is shown.
The WvB is the vertical width of the opening corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the vertical direction is defined as the third vertical arrangement number. In addition, if the third vertical arrangement number is 1, the ΣLvB has a vertical width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third vertical arrangement number is 2 or more. For example, the total of the vertical widths of the bottom surfaces of the lenses formed in a vertically aligned state corresponding to the blue sub-pixels is shown.

(3) At least one of the following formula 27 or formula 28 is satisfied.
The display device according to (1) or (2) above.

LB / LR≤2 ... (Formula 27)

LB / LG ≤ 2 ... (Formula 28)

However, in the formula 5 and the formula 6, LB indicates the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel.
LG indicates the horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixel.
LB indicates the horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel.

(4) At least one of the following formula 29 or formula 30 is satisfied.
The display device according to (2) above.

LvB / LvR≤2 ... (Formula 29)

LvB / LvG≤2 ... (Formula 30)

However, in the formula 29 and the formula 30, LvB indicates the vertical width of the bottom surface of the lens formed corresponding to the red sub-pixel.
LvG indicates the vertical width of the bottom surface of the lens formed corresponding to the green sub-pixel.
LvB indicates the vertical width of the bottom surface of the lens formed corresponding to the blue sub-pixel.

(5) The number of the first horizontal arrangement, the number of the second horizontal arrangement, and the number of the third horizontal arrangement are 3 or less.
The display device according to any one of (1) to (4) above.
(6) The number of the first vertical arrangement, the number of the second vertical arrangement, and the number of the third vertical arrangement are 3 or less.
The display device according to (2) or (4) above.
(7) The separation distance between the surface of the first electrode and the bottom surface of the lens corresponding to each of the sub-pixels is 0.5 μm or more and 5.0 μm or less.
The display device according to any one of (1) to (6) above.
(8) Equipped with a color filter
The color filter is provided at a position closer to the first electrode than the lens.
The display device according to any one of (1) to (7) above.
(9) Equipped with a color filter
The color filter is provided at a position farther from the first electrode than the lens.
The display device according to any one of (1) to (8) above.
(10) Equipped with multiple color filters
The color filter is provided at both a position farther and a position closer to the first electrode than the lens.
The display device according to any one of (1) to (9) above.
(11) A red filter, a green filter, and a blue filter are provided as color filters corresponding to the sub-pixels corresponding to each color type.
The horizontal width of the blue filter is narrower than at least one of the horizontal width of the red filter and the horizontal width of the green filter.
The display device according to any one of (1) to (10) above.
(12) A plurality of different color types are provided as color filters corresponding to the sub-pixels corresponding to each color type.
A black matrix is provided between or at the boundaries of adjacent filters of different color types.
The display device according to any one of (1) to (11) above.
(13) The lens formed corresponding to the blue sub-pixel is at least the lens formed corresponding to the red sub-pixel or the lens formed corresponding to the green sub-pixel. Greater refractive power than one,
The display device according to any one of (1) to (12) above.
(14) A plurality of sub-pixels corresponding to at least red, green, and blue color types, and
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A wall surface is formed around a lens formed at least one corresponding to each of the sub-pixels and a light emitting region of each of the light emitting elements corresponding to each of the sub-pixels, and in the thickness direction of the light emitting element. With an extended reflective wall, the following equations 31 and 32 are satisfied.
Display device.

ΣLR / WrR <ΣLB / WrB ... (Formula 31)

ΣLG / WrG <ΣLB / WrB ... (Formula 32)

However, in the formula 31 and the formula 32, the WrR is the horizontal width of the tip of the wall surface corresponding to the red sub-pixel, and is in the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations along the line is the first horizontal arrangement number, the ΣLR is the horizontal direction of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. The width, if the first horizontal arrangement number is 2 or more, indicates the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels.
The WrG is the horizontal width of the tip of the wall surface corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In this case, if the number of front second horizontal arrangements is 1, the width of the bottom surface of the lens formed corresponding to the green sub-pixels and the number of second horizontal arrangements are 2 or more. If, then the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the green sub-pixels is shown.
The WrB is the horizontal width of the tip of the wall surface corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. If the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. If, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the blue sub-pixels is shown.

(15) A plurality of sub-pixels corresponding to at least red, green, and blue color types, and
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A lens formed at least one corresponding to each of the sub-pixels,
A reflector plate formed at a predetermined position on the formation surface side of the first electrode of the light emitting element corresponding to each of the sub-pixels is provided.
The following formulas 33 and 34 are satisfied.
Display device.

ΣLR / WbR <ΣLB / WbB ... (Formula 33)

ΣLG / WbG <ΣLB / WbB ... (Formula 34)

However, in the formula 11 and the formula 12, the WbR is the horizontal width of the reflector corresponding to the red sub-pixel, and is along the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations is the first horizontal arrangement number, the ΣLR is the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. When the number of the first horizontal arrangements is 2 or more, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels is shown.
The WbG is the horizontal width of the reflector corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In addition, if the number of front second horizontal arrangements is 1, the ΣLG has a horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second horizontal arrangements is 2 or more. For example, the total horizontal width of the bottom surface of each of the lenses formed in a horizontally aligned state corresponding to the green sub-pixel is shown.
The WbB is the horizontal width of the reflector corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. In addition, if the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. For example, the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the blue sub-pixels is shown.

(16) The separation distance between the surface of the reflector and the bottom surface of the lens corresponding to each of the sub-pixels is 0.5 μm or more and 5.0 μm or less.
The display device according to (15) above.
(17)
The display device according to any one of (1) to (16) above is provided.
Electronics.

10 Display device 11 Substrate 13A 1st electrode 13B Organic compound layer 13C 2nd electrode 14 Insulation layer 14A Opening 15 Protective layer 17 Color filter 18 Lens 19 Black matrix layer 21 Reflective wall 22 Wall surface 23 Reflector 310 Digital still camera (electronic equipment) )
320 Head-mounted display (electronic device)
330 Television equipment (electronic equipment)

Claims

Multiple sub-pixels that form a pixel unit and correspond to at least red, green, and blue color types,
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A lens formed at least one corresponding to each of the sub-pixels is provided.
Each of the light emitting elements is provided with an insulating layer that covers the peripheral edge of the first electrode and forms an opening corresponding to each of the sub-pixels on the first electrode.
The following formulas 1 and 2 are satisfied.
Display device.
ΣLR / WR <ΣLB / WB ... (Formula 1)
ΣLG / WG <ΣLB / WB ... (Formula 2)
(However, in the formula 1 and the formula 2, the WR is the horizontal width of the opening corresponding to the red sub-pixel, and is along the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations is the first horizontal arrangement number, the ΣLR is the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. If the number of the first horizontal arrangements is 2 or more, the total horizontal widths of the bottom surfaces of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels are shown.
The WG is the horizontal width of the opening corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In addition, if the number of front second horizontal arrangements is 1, the ΣLG has a horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second horizontal arrangements is 2 or more. For example, the total horizontal width of the bottom surface of each of the lenses formed in a horizontally aligned state corresponding to the green sub-pixel is shown.
The WB is the horizontal width of the opening corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. In addition, if the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. For example, the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the blue sub-pixels is shown. )
The following formulas 3 and 4 are satisfied.
The display device according to claim 1.
ΣLvR / WvR <ΣLvB / WvB ... (Formula 3)
ΣLvG / WvG <ΣLvB / WvB ... (Formula 4)
(However, in the formula 3 and the formula 4, the WvR is the vertical width of the opening corresponding to the red sub-pixel, and is along the vertical direction of the lens corresponding to the red sub-pixel. When the number of formations is the first vertical arrangement number, the ΣLvR is the vertical width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first vertical arrangement number is 1. If the number of the first vertical arrangements is 2 or more, the total vertical width of each bottom surface of the lenses formed in a vertically aligned state corresponding to the red sub-pixels is shown.
The WvG is the vertical width of the opening corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the vertical direction is defined as the second vertical arrangement number. In addition, if the number of front second vertical arrangements is 1, the ΣLvG has a vertical width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second vertical arrangements is 2 or more. For example, the total vertical width of the bottom surface of each of the lenses formed in a vertically aligned state corresponding to the green sub-pixel is shown.
The WvB is the vertical width of the opening corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the vertical direction is defined as the third vertical arrangement number. In addition, if the third vertical arrangement number is 1, the ΣLvB has a vertical width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third vertical arrangement number is 2 or more. For example, the total of the vertical widths of the bottom surfaces of the lenses formed in a vertically aligned state corresponding to the blue sub-pixels is shown. )
At least one of Equation 5 or Equation 6 below is satisfied.
The display device according to claim 1.
LB / LR≤2 ... (Formula 5)
LB / LG ≦ 2 ・・・ (Formula 6)
(However, in the formula 5 and the formula 6, LB indicates the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel.
LG indicates the horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixel.
LB indicates the horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel. )
At least one of Equation 7 or Equation 8 below is satisfied.
The display device according to claim 2.
LvB / LvR ≦ 2 ・・・ (Formula 7)
LvB / LvG ≦ 2 ・・・ (Formula 8)
(However, in the formula 7 and the formula 8, LvB indicates the vertical width of the bottom surface of the lens formed corresponding to the red sub-pixel.
LvG indicates the vertical width of the bottom surface of the lens formed corresponding to the green sub-pixel.
LvB indicates the vertical width of the bottom surface of the lens formed corresponding to the blue sub-pixel. )
The number of the first horizontal arrangement, the number of the second horizontal arrangement, and the number of the third horizontal arrangement are 3 or less.
The display device according to claim 1.
The number of the first vertical arrangement, the number of the second vertical arrangement, and the number of the third vertical arrangement are 3 or less.
The display device according to claim 2.
The separation distance between the surface of the first electrode and the bottom surface of the lens corresponding to each of the sub-pixels is 0.5 μm or more and 5.0 μm or less.
The display device according to claim 1.
Equipped with color filters,
The color filter is provided at a position closer to the first electrode than the lens.
The display device according to claim 1.
Equipped with color filters,
The color filter is provided at a position farther from the first electrode than the lens.
The display device according to claim 1.
Equipped with multiple color filters,
The color filter is provided at both a position farther and a position closer to the first electrode than the lens.
The display device according to claim 1.
A red filter, a green filter, and a blue filter are provided as color filters corresponding to the sub-pixels corresponding to each color type.
The horizontal width of the blue filter is narrower than at least one of the horizontal width of the red filter and the horizontal width of the green filter.
The display device according to claim 1.
As a color filter corresponding to the sub-pixel corresponding to each color type, filters of a plurality of different color types are provided.
A black matrix is provided between or at the boundaries of adjacent filters of different color types.
The display device according to claim 1.
The lens formed corresponding to the blue sub-pixel is more than the lens formed corresponding to the red sub-pixel or the lens formed corresponding to the green sub-pixel. Large refractive power,
The display device according to claim 1.
With multiple sub-pixels corresponding to at least red, green and blue color types,
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A wall surface is formed around a lens formed at least one corresponding to each of the sub-pixels and a light emitting region of each of the light emitting elements corresponding to each of the sub-pixels, and in the thickness direction of the light emitting element. With an extended reflective wall, the following equations 9 and 10 are satisfied.
Display device.
ΣLR / WrR <ΣLB / WrB ... (Formula 9)
ΣLG / WrG <ΣLB / WrB ... (Formula 10)
(However, in the formula 9 and the formula 10, the WrR is the horizontal width of the tip of the wall surface corresponding to the red sub-pixel, and the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations along the above is the first horizontal arrangement number, the ΣLR is the horizontal direction of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. If the number of first horizontal arrangements is 2 or more, the total horizontal width of the bottom surface of each of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels is shown.
The WrG is the horizontal width of the tip of the wall surface corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In this case, if the number of front second horizontal arrangements is 1, the width of the bottom surface of the lens formed corresponding to the green sub-pixels and the number of second horizontal arrangements are 2 or more. If, then the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the green sub-pixels is shown.
The WrB is the horizontal width of the tip of the wall surface corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. If the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. If, the total horizontal width of each bottom surface of the lenses formed in a state of being arranged horizontally corresponding to the blue sub-pixels is shown. )
With multiple sub-pixels corresponding to at least red, green and blue color types,
A plurality of light emitting elements formed corresponding to each of the sub-pixels and having a structure in which a first electrode and a second electrode are laminated with an organic compound layer interposed therebetween.
A lens formed at least one corresponding to each of the sub-pixels,
A reflector plate formed at a predetermined position on the formation surface side of the first electrode of the light emitting element corresponding to each of the sub-pixels is provided.
The following formulas 11 and 12 are satisfied.
Display device.
ΣLR / WbR <ΣLB / WbB ... (Formula 11)
ΣLG / WbG <ΣLB / WbB ... (Formula 12)
(However, in the formula 11 and the formula 12, the WbR is the horizontal width of the reflector corresponding to the red sub-pixel, and is along the horizontal direction of the lens corresponding to the red sub-pixel. When the number of formations is the first horizontal arrangement number, the ΣLR is the horizontal width of the bottom surface of the lens formed corresponding to the red sub-pixel if the first horizontal arrangement number is 1. If the number of the first horizontal arrangements is 2 or more, the total horizontal widths of the bottom surfaces of the lenses formed in a state of being arranged horizontally corresponding to the red sub-pixels are shown.
The WbG is the horizontal width of the reflector corresponding to the green sub-pixel, and the number of formations of the lens corresponding to the green sub-pixel along the horizontal direction is defined as the second horizontal arrangement number. In addition, if the number of front second horizontal arrangements is 1, the ΣLG has a horizontal width of the bottom surface of the lens formed corresponding to the green sub-pixels, and the number of second horizontal arrangements is 2 or more. For example, the total horizontal width of the bottom surface of each of the lenses formed in a horizontally aligned state corresponding to the green sub-pixel is shown.
The WbB is the horizontal width of the reflector corresponding to the blue sub-pixel, and the number of formations of the lens corresponding to the blue sub-pixel along the horizontal direction is defined as the third horizontal arrangement number. In addition, if the third horizontal arrangement number is 1, the ΣLB has a horizontal width of the bottom surface of the lens formed corresponding to the blue sub-pixel, and the third horizontal arrangement number is 2 or more. For example, the sum of the horizontal widths of the bottom surfaces of the lenses formed in a horizontally aligned state corresponding to the blue sub-pixels is shown. )
The distance between the surface of the reflector and the bottom surface of the lens corresponding to each of the sub-pixels is 0.5 μm or more and 5.0 μm or less.
The display device according to claim 15.
The display device according to claim 1 is provided.
Electronics.