阅读说明：本技术 显示装置 (Display device ) 是由 上田大辅 关根昌章 根岸英辅 于 2019-09-18 设计创作，主要内容包括：该显示装置包括以二维矩阵的方式布置在基板上的多个发光单元。本发明至少包括：第一透镜单元,布置在多个发光单元上并且包括与每个发光单元对应的第一微透镜；以及第二透镜单元,布置在第一透镜单元上并且包括与每个发光单元对应的第二微透镜。替代性地,本发明包括柱状导光单元,该柱状导光单元布置在多个发光单元的上并且与每个发光单元对应,间隔壁部设置在彼此相邻的导光单元之间。(The display device includes a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate. The invention at least comprises: a first lens unit disposed on the plurality of light emitting units and including a first microlens corresponding to each of the light emitting units; and a second lens unit disposed on the first lens unit and including a second microlens corresponding to each light emitting unit. Alternatively, the present invention includes a columnar light guide unit disposed on the plurality of light emitting units and corresponding to each of the light emitting units, and partition wall portions disposed between the light guide units adjacent to each other.)

1. A display device comprising at least:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate;

a first lens unit disposed over the plurality of light emitting units and having a first microlens corresponding to each light emitting unit; and

a second lens unit disposed above the first lens unit and having a second microlens corresponding to each light emitting unit.

2. The display device according to claim 1,

a color filter is disposed between the first and second microlenses.

3. The display device according to claim 1, further comprising

A third lens unit disposed above the second lens unit and having a third microlens corresponding to each light emitting unit.

4. The display device according to claim 3,

color filters are disposed between the first and second microlenses and between the second and third microlenses, respectively.

5. The display device according to claim 1,

the refractive index of a material forming the first microlenses is greater than the refractive index of a material forming the second microlenses.

6. The display device according to claim 5,

a color filter is disposed between the first and second microlenses, and

the refractive index of the optical material forming the color filter is smaller than the refractive index of the optical material forming the first microlens and equal to or higher than the refractive index of the optical material forming the second microlens.

7. The display device according to claim 5,

the first microlenses are formed of an inorganic material, and the second microlenses are formed of an organic material.

8. A display device, comprising:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate; and

a columnar light guide portion arranged above the plurality of light emitting units and corresponding to each of the light emitting units, wherein,

the partition wall is provided between the light guide portions adjacent to each other.

9. The display device according to claim 8,

the boundary surface between the partition wall and the light guide portion forms a light reflecting surface.

10. The display device according to claim 8,

the light guide part is formed of a dielectric material.

11. The display device according to claim 10,

the light guide part is made of an organic material.

12. The display device according to claim 8,

the partition wall portion is provided: such that the refractive index of the partition wall portion is smaller than the refractive index of the light guide portion.

13. The display device according to claim 8,

the partition wall portion is formed as a space.

14. The display device according to claim 8,

the partition wall portion is formed of a dielectric material.

15. The display device according to claim 8,

the partition wall portion is formed of a metal material.

16. The display device according to claim 8,

a boundary surface between the partition wall portion and the light guide portion extends in a normal direction of a virtual plane including the plurality of light emitting cells.

17. The display device according to claim 8,

a boundary surface between the partition wall portion and the light guide portion extends to form a predetermined angle with respect to a normal direction of a virtual plane including the plurality of light emitting units.

18. The display device according to claim 8, comprising:

a transparent substrate disposed to face the substrate, wherein,

the substrate is provided with bonding portions arranged to surround regions of the plurality of light emitting cells arranged in a two-dimensional matrix, and

the substrate and the transparent substrate are joined by the joining portion.

19. The display device according to claim 18,

the height of the joining portion is formed to be equal to the height of the light guide portion.

20. The display device according to claim 8,

the light guide part includes at least a first microlens positioned above the light emitting unit and a second microlens positioned on the first microlens.

21. The display device according to claim 20,

the partition wall portion is embedded in a filler layer provided between the first microlens and the second microlens, and the partition wall portion is provided such that a refractive index of the partition wall portion is smaller than a refractive index of the filler layer.

22. The display device according to claim 20,

the color filter is arranged at any one of the following positions: the light emitting unit is arranged between the light emitting unit and the first micro lens, between the first micro lens and the second micro lens and above the second micro lens.

Technical Field

The present disclosure relates to a display device.

Background

A display element provided with a current-driven type light emitting unit and a display device provided with such a display element are well known. For example, a display element provided with a light emitting unit composed of an organic electroluminescence element has attracted attention as a display element capable of high-luminance light emission by low-voltage direct current driving.

A display device using organic electroluminescence is self-luminous and also has sufficient responsiveness to a high-definition high-speed video signal. For example, in a display device for wearing on glasses (such as glasses and goggles), in addition to setting a pixel size to about several micrometers to 10 micrometers, it is necessary to increase brightness. For example, PTL 1 proposes forming a lens structure on a color filter to improve light extraction efficiency.

[ list of references ]

[ patent document ]

[PCT 1]

JP 2013-149536 A

Disclosure of Invention

[ problem to be solved by the invention ]

When light from a specific pixel leaks to adjacent pixels in a display device, color mixing occurs between the adjacent pixels, and the quality of an image deteriorates. Therefore, in order to improve luminance, it is necessary to be able to suppress color mixing between adjacent pixels while further improving light extraction efficiency.

An object of the present disclosure is to provide a display device capable of improving light extraction efficiency and suppressing color mixing between adjacent pixels.

[ solution of problem ]

A display device according to a first aspect of the present disclosure for achieving the above object includes at least:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate;

a first lens unit disposed over the plurality of light emitting units and having a first microlens corresponding to each of the light emitting units; and

and a second lens unit disposed above the first lens unit and having a second microlens corresponding to each light emitting unit.

A display device according to a second aspect of the present disclosure for achieving the above object includes:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate; and

a columnar light guide part disposed above the plurality of light emitting units and corresponding to each of the light emitting units, wherein,

the partition wall is provided between the light guide portions adjacent to each other.

Drawings

Fig. 1 is a schematic plan view of the display device of the first aspect.

Fig. 2 is a schematic partial cross-sectional view of a display device according to the first aspect.

Fig. 3A and 3B are schematic plan views for explaining the arrangement relationship of various constituent elements constituting a pixel. Fig. 3A shows the arrangement relationship of the anode electrodes, and fig. 3B shows the arrangement relationship of the first microlenses.

Fig. 4A and 4B are schematic plan views for explaining the arrangement relationship of various constituent elements constituting a pixel, following fig. 3B. Fig. 4A shows the arrangement relationship of the color filters, and fig. 4B shows the arrangement relationship of the second microlenses.

Fig. 5A and 5B are schematic views for explaining light collection by a lens. Fig. 5A is a schematic diagram of a state where light collection is performed by a single lens. Fig. 5B is a schematic diagram of a state where light collection is performed by two lenses.

Fig. 6 is a schematic partial sectional view of a display device according to a reference example.

Fig. 7A and 7B are schematic partial end views for explaining a method for manufacturing a display device according to the first aspect.

Fig. 8A and 8B are schematic partial end views for explaining a method for manufacturing a display device according to the first aspect, following fig. 7B.

Fig. 9 is a schematic partial end view for explaining a method for manufacturing a display device according to the first aspect next to fig. 8B.

Fig. 10 is a schematic partial end view for explaining a method for manufacturing a display device according to the first aspect next to fig. 9.

Fig. 11 is a schematic partial sectional view of a display device according to a first modification of the first aspect.

Fig. 12 is a schematic partial sectional view of a display device according to a second modification of the first aspect.

Fig. 13 is a schematic partial sectional view of a display device according to a third modification of the first aspect.

Fig. 14 is a schematic cross-sectional view for explaining the relationship between the light-emitting region width and the lens width.

Fig. 15A and 15B are schematic plan views for explaining the arrangement relationship of various constituent elements in a pixel of a modification. Fig. 15A shows the arrangement relationship of the anode electrodes, and fig. 15B shows the arrangement relationship of the first microlenses.

Fig. 16A and 16B are schematic plan views for explaining the arrangement relationship of various constituent elements in a pixel of a modification next to fig. 15B. Fig. 16A shows the arrangement relationship of the color filters, and fig. 16B shows the arrangement relationship of the second microlenses.

Fig. 17A and 17B are schematic views of a display device according to the second aspect. Fig. 17A shows a schematic plan view of the display device, and fig. 17B shows a schematic cross-sectional view of the display device.

Fig. 18 is a schematic partial cross-sectional view of a display device according to a second aspect.

Fig. 19 is a schematic diagram for explaining reflection of light in the light guide portion.

Fig. 20A, 20B and 20C are schematic partial end views for explaining a method for manufacturing a display device according to the second aspect.

Fig. 21A and 21B are schematic views for explaining a method for manufacturing a display device according to the second aspect, following fig. 20C. Fig. 21A shows a schematic plan view of the counter substrate, and fig. 21B shows a schematic cross-sectional view of the counter substrate.

Fig. 22A and 22B are schematic end views for explaining a method for manufacturing a display device according to the second aspect, following fig. 21B.

Fig. 23A, 23B and 23C are schematic partial end views for explaining other processing examples.

Fig. 24 is a schematic partial sectional view of a display device according to a first modification of the second aspect.

Fig. 25A, 25B and 25C are schematic partial end views for explaining a method for manufacturing a display device according to a first modification of the second aspect.

Fig. 26A, 26B, and 26C are schematic partial end views for explaining a method for manufacturing a display device according to the first modification of the second aspect, next to fig. 25C.

Fig. 27A, 27B and 27C are schematic partial end views for explaining examples of other steps.

Fig. 28 is a schematic partial sectional view of a display device according to a third embodiment.

Fig. 29A and 29B are schematic partial end views for explaining a method for manufacturing a display device according to a third embodiment.

Fig. 30 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, next to fig. 29B.

Fig. 31 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, following fig. 30.

Fig. 32 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, following fig. 31.

Fig. 33 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, following fig. 32.

Fig. 34 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, following fig. 33.

Fig. 35 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, next to fig. 34.

Fig. 36 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, following fig. 35.

Fig. 37 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, following fig. 36.

Fig. 38 is a schematic partial end view for explaining a method for manufacturing a display device according to a third embodiment, next to fig. 37.

Fig. 39 is a schematic partial sectional view of a display device according to a first modification of the third embodiment.

Fig. 40 is a schematic partial sectional view of a display device according to a second modification of the third embodiment.

Fig. 41 is a schematic partial sectional view of a display device according to a third modification of the third embodiment.

Fig. 42A and 42B are external views of an interchangeable-lens single-lens reflex type digital still camera. Fig. 42A shows a front view, and fig. 42B shows a rear view.

Fig. 43 is an external view of the head mounted display.

Fig. 44 is an external view of a see-through head mounted display.

Detailed Description

Hereinafter, the present disclosure will be described based on embodiments with reference to the accompanying drawings. The present disclosure is not limited to these embodiments, and various numerical values and materials in the embodiments are exemplary. In the following description, the same reference numerals will be used for the same elements or elements having the same functions, and redundant description will be omitted. The description will be given in the following order.

1. Description of display devices and general information related to the present disclosure

2. First embodiment

3. Second embodiment

4. Third embodiment

5. Description of electronic devices, etc.

[ description of display device and general information related to the present disclosure ]

As described above, the display device according to the first aspect of the present disclosure includes at least:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate;

a first lens unit disposed over the plurality of light emitting units and having a first microlens corresponding to each of the light emitting units; and

and a second lens unit disposed above the first lens unit and having a second microlens corresponding to each light emitting unit.

The display device according to the first aspect of the present disclosure may have a configuration in which a color filter is arranged between a first microlens and a second microlens. The microlenses may be configured from a known colorless transparent material. The microlens can be formed by a known method such as exposure using a gray-tone mask, melt flow, and dry etching. The color filter may be configured of a known color resist material to which a colorant composed of a desired pigment or dye is added. In some cases, it is also possible to select a material to which no coloring material is added as a color filter, and set the corresponding pixel as a white display pixel.

The display device according to the first aspect of the present disclosure including the above-described preferred configuration may further have a configuration including a third lens unit that is arranged above the second lens unit and has a third microlens corresponding to each light emitting unit. In this case, a configuration in which color filters are arranged between the first microlens and the second microlens and between the second microlens and the third microlens may be used.

The display device according to the first aspect of the present disclosure including the various preferred configurations described above may have a configuration in which the refractive index of the material constituting the first microlenses is larger than the refractive index of the material constituting the second microlenses. In this case, a configuration may be used in which a color filter is disposed between the first microlens and the second microlens, and the refractive index of the optical material constituting the color filter is lower than the refractive index of the optical material constituting the first microlens and equal to or higher than the refractive index of the optical material constituting the second microlens. Further, a configuration in which the first microlenses are formed of an inorganic material and the second microlenses are formed of an organic material may be used. The refractive index of the constituent materials used in the present disclosure can be determined by measurement with, for example, an ellipsometer.

As described above, the display device according to the second aspect of the present disclosure includes:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate; and

a columnar light guide part disposed above the plurality of light emitting units and corresponding to each of the light emitting units, wherein,

the partition wall is provided between the light guide portions adjacent to each other.

The display device according to the second aspect of the present disclosure may have a configuration in which a boundary surface between the partition wall portion and the light guide portion forms a light reflecting surface.

A display device according to a second aspect of the present disclosure including the above-described preferred configuration may have a configuration in which the light guide part is formed of a dielectric material. In this case, a configuration in which the light guide portion is formed of an organic material may be used. Examples of the organic material include acrylic resin materials, silicone resins (such as polysiloxane), and the like.

A display device according to a second aspect of the present disclosure including the above-described preferred configuration may have a configuration in which the partition wall portions are provided to have a refractive index smaller than that of the light guide portions. In this case, the partition wall portion may be spatially disposed. The space may be in a state where the pressure is kept lower than the standard atmospheric pressure as an actual vacuum state, or may be in a state of being filled with a gas (such as an atmosphere or nitrogen). Alternatively, a configuration in which the intermediate partition wall portion is formed of a dielectric material may also be used.

Alternatively, the display device according to the second aspect of the present disclosure including the various preferred configurations described above may have a configuration in which the intermediate partition wall portion is formed of a metal material. As the metal material, a metal material having a high visible light reflectance is preferably selected, and examples thereof may include aluminum (Al), gold (Au), silver (Ag), chromium (Cr), nickel (Ni), or an alloy including these.

A display device according to a second aspect of the present disclosure, which includes the various preferred configurations described above, may have a configuration in which a boundary surface between the intermediate partition wall portion and the light guide portion extends in a normal direction of a virtual plane including the plurality of light emitting units. Alternatively, a configuration may be used in which the boundary surface between the partition wall portion and the light guide portion forms a predetermined angle with respect to the normal direction of a virtual plane including the plurality of light emitting units.

A display device according to a second aspect of the present disclosure, which includes the above-described various preferred configurations, may have a configuration in which a transparent substrate is provided so as to face the substrate, and wherein the substrate is provided with a bonding portion arranged so as to surround a region of the plurality of light emitting cells arranged in a two-dimensional matrix, and the substrate and the transparent substrate are bonded by the bonding portion.

For example, the substrate and the transparent substrate may be irradiated with plasma to activate the surface of the bonded portion and the like in vacuum, and then they may be bonded in vacuum. In this case, from the viewpoint of adhesiveness, it is preferable to form a thin film made of an inorganic material such as metal or silicon on the bonding surface. The height of the joining portion is preferably the same as the height of the light guide portion. In general, the bonding part and the light guide part may be formed to the same height by sharing the process of forming the bonding part and the process of forming the light guide part.

A display device according to a second aspect of the present disclosure including the various preferred configurations described above may have a configuration in which the light guide portion includes at least a first microlens located above the light emitting unit and a second microlens located on the first microlens. In this case, a configuration may be used in which the intermediate partition wall portion is embedded in a filling layer provided between the first microlens and the second microlens and is provided such that its refractive index is smaller than that of the filling layer. Alternatively, a configuration in which a color filter is arranged between the light emitting unit and the first microlens, between the first microlens and the second microlens, or over the second microlens may be used.

In the display device according to the present disclosure including the various preferred configurations described above, examples of the light emitting unit include an organic electroluminescence light emitting unit, an LED light emitting unit, and a semiconductor laser light emitting unit. These light emitting cells may be configured using well-known materials and methods. From the viewpoint of disposing the flat display device, the light emitting unit is preferably constituted by an organic electroluminescence unit.

The organic electroluminescent unit is preferably of a so-called top emission type. The organic electroluminescent light-emitting unit may be composed of an anode electrode, a hole transport layer, a light-emitting layer, an electron transport layer, a cathode electrode, and the like.

When the display device is a color display, the display device may be configured by combining a white light emitting unit and a color filter. In this configuration, organic layers including a hole transport layer, a light emitting layer, an electron transport layer, and the like can be shared among a plurality of pixels. Therefore, it is not necessary to individually coat an organic layer for each pixel. Alternatively, a configuration in which a red light emitting organic layer, a green light emitting organic layer, and a blue light emitting organic layer are separately coated according to pixels may be used. In this configuration, the finer the pixel pitch, the more difficult it is to coat individually. Therefore, in a display device having a pixel pitch in the order of micrometers, it is preferable to have a configuration in which a white light emitting unit and a color filter are combined.

In the organic electroluminescent light-emitting unit that emits white light, for example, the organic layer may be implemented to have a laminated structure including a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer. Alternatively, the organic layer may be implemented to have a laminated structure including a blue light emitting layer emitting blue light and a yellow light emitting layer emitting yellow light, or a laminated structure including a blue light emitting layer emitting blue light and an orange light emitting layer emitting orange light. The layers will emit white light as a whole. The material constituting the organic layer is not particularly limited, and a known material can be used.

Examples of the material constituting the anode electrode of the organic electroluminescent unit include metals such as platinum (Pt), gold (Au), silver (Ag), chromium (Cr), tungsten (W), nickel (Ni), aluminum (Al), copper (Cu), iron (Fe), cobalt (Co), tantalum (Ta), or alloys, and transparent conductive materials such as indium tin oxide (ITO, In including doped Sn), and the like₂O₃Crystalline ITO and amorphous ITO), and Indium Zinc Oxide (IZO)).

As a material constituting the cathode electrode of the organic electroluminescent light-emitting unit, a conductive material is preferable so that emitted light can be transmitted and electrons can be efficiently injected into the organic layer. For example, there may be mentioned metals or alloys such as aluminum (Al), silver (Ag), magnesium (Mg), calcium (Ca), sodium (Na), strontium (Sr), Mg-Ag alloys, Mg-Ca alloys, Al-Li alloys, and the like.

The driving unit for driving the light emitting unit is disposed below the substrate on which the light emitting unit is disposed, but this configuration is not restrictive. For example, the driver circuit may be configured by a transistor (specifically, for example, MOSFET) formed on a silicon semiconductor substrate constituting the substrate or a Thin Film Transistor (TFT) provided on various substrates constituting the substrate. An embodiment in which a transistor constituting a driver circuit and a light emitting cell are connected to each other via a contact hole (contact plug) formed in a substrate or the like is possible. The drive circuit may have a well-known circuit configuration.

The arrangement of the pixels is not particularly limited as long as it does not hinder the implementation of the display device of the present disclosure. Examples of pixel arrays include square arrays, triangular (delta) arrays, and striped arrays.

The various requirements in this specification are satisfied not only when strictly mathematically satisfied, but also when substantially satisfied. The existence of various design or manufacturing variations is acceptable. Further, each drawing used in the following description is schematic, and does not show an actual size or a scale thereof. For example, fig. 2, which will be described below, illustrates a cross-sectional structure of the display device, but does not illustrate proportions such as width, height, and thickness.

[ first embodiment ]

A first embodiment relates to a display device according to the first aspect of the present disclosure.

Fig. 1 is a conceptual diagram of a display device of the first embodiment. Fig. 2 is a schematic partial cross-sectional view of a display device according to the first aspect.

As shown in fig. 1, the display device 1 includes a plurality of light emitting cells 25 arranged in a two-dimensional matrix on a substrate 10. The light emitting units 25 are arranged to correspond to the respective pixels 70 of the display device 1. The light emitting unit 25 is constituted by an organic electroluminescence element. Hereinafter, the configuration of the light emitting unit 25 will be described in detail. The display device 1 includes a transparent substrate 90 arranged to face the substrate 10. Reference numeral 80 denotes a joint portion between the substrate 10 and the transparent substrate 90, which is provided to surround the display area.

As shown in fig. 2, the display device 1 includes at least a first lens unit 30A disposed above the plurality of light emitting units 25 and having a first microlens 31A corresponding to each light emitting unit 25, and a second lens unit 30B disposed above the first lens unit 30A and having a second microlens 31B corresponding to each light emitting unit 25. The first and second microlenses 31A and 31B are formed as convex lenses having a convex shape on the light exit side. In the figure, the microlens is configured to have a convex lens shape on the light exit side, but this is merely an example, and as shown in this example, it is sufficient if the lens can have a refraction function, and it is sufficient to make the light emitting unit side have a convex shape. Therefore, the shape of the microlens is not limited to the shape shown in the drawings.

The color filter 50 is disposed between the first microlens 31A and the second microlens 31B. More specifically, the planarization film 40 is disposed on the first microlens 31A, and the color filter 50 is disposed thereon. The second microlenses 31B are arranged on the color filters 50. The pixel 70 is configured by the light emitting unit 25 and the first microlens 31A, the color filter 50, and the second microlens 31B corresponding thereto. In fig. 2, a red color filter, a green color filter, and a blue color filter are denoted by reference numerals 50R, 50G, and 50B, respectively. Similarly, red display pixels, green display pixels, and blue display pixels are denoted by reference numerals 70R, 70G, and 70B. The same applies to the other figures described below. In some cases, it is also possible to select a material to which no coloring material is added as a color filter, and set the corresponding pixel as a white display pixel.

The relationship among the refractive indices of the materials constituting the first and second microlenses 31A and 31B and the color filter 50 will be described. The refractive index of the material forming the first microlenses 31A is greater than the refractive index of the material forming the second microlenses 31B. Further, the refractive index of the optical material forming the color filter 50 is smaller than the refractive index of the optical material forming the first microlenses 31A and equal to or higher than the refractive index of the optical material forming the second microlenses 31B.

The first microlenses 31A are formed of an inorganic material, and the second microlenses 31B are formed of an organic material. Specifically, the first microlenses 31A are formed of silicon nitride (refractive index of about 1.8), and the color filter 50 and the planarization film 40 are formed of an acrylic resin material (refractive index of about 1.4 to 1.5). The second microlenses 31B are formed by selecting an acrylic resin material having a refractive index smaller than that of the color filter 50 or the same as that of the color filter 50.

Reference numeral 60 denotes a sealing resin layer provided between the second microlenses 31B and the transparent substrate 90. Examples of the material constituting the sealing resin layer 60 include thermosetting adhesives (such as acrylic adhesives, epoxy adhesives, urethane adhesives, silicone adhesives, and cyanoacrylate adhesives) and ultraviolet-curable adhesives. It is desirable that the refractive index of the sealing resin layer 60 is smaller than the refractive index of the optical material constituting the second microlenses 31B.

Next, the light emitting unit 25 and a driving circuit for driving the light emitting unit 25 will be described.

The driving circuit for driving the light emitting unit 25 is configured by a MOSFET or the like formed on a silicon semiconductor substrate corresponding to the substrate 10. A transistor composed of a MOSFET is configured by a gate insulating layer 14 formed on a substrate 10, a gate electrode 15 formed on the gate insulating layer 14, source/drain regions 12 formed in the substrate 10, a channel forming region 13 formed between the source/drain regions 12, and an element separating region 11 surrounding the channel forming region 13 and the source/drain regions 12. Reference numeral 20 denotes a planarization film covering the entire surface including the top of the gate electrode 15.

The anode electrode 22 disposed corresponding to each light-emitting cell 25 is formed on the planarization film 20. The anode electrode 22 and the transistor are electrically connected via a contact plug 21 provided in the planarization film 20.

An organic layer 23 emitting white light is formed on the entire surface including the top of the anode electrode 22. The organic layer 23 has a laminated structure of a red light emitting layer, a green light emitting layer, and a blue light emitting layer. Although the organic layer 23 is formed by laminating a plurality of material layers, it is represented by one layer in the drawing. A cathode electrode 24 arranged as a common electrode for the light emitting unit 25 is formed on the organic layer 23. For example, the ground potential is supplied to the cathode electrode 24. In some cases, a configuration in which a red light emitting organic layer, a green light emitting organic layer, and a blue light emitting organic layer are separately coated may be used according to pixels.

When a voltage is applied between the anode electrode 22 and the cathode electrode 24, a portion of the organic layer 23 located on the anode electrode 22 emits light. As described above, the light emitting unit 25 is configured by an organic electroluminescence element.

In the display device 1, the pixels are arranged in a square shape, for example. Fig. 3A and 3B are schematic plan views for explaining the arrangement relationship of various constituent elements constituting a pixel. Fig. 3A shows the arrangement relationship of the anode electrodes, and fig. 3B shows the arrangement relationship of the first microlenses. Fig. 4A and 4B are schematic plan views for explaining the arrangement relationship of various constituent elements constituting a pixel, following fig. 3B. Fig. 4A shows the arrangement relationship of the color filters, and fig. 4B shows the arrangement relationship of the second microlenses.

The configuration of the display device 1 has been described above in detail.

Subsequently, the effect of forming the second microlenses 31B in addition to the first microlenses 31A will be qualitatively explained.

Fig. 5A and 5B are schematic diagrams for explaining how light is collected by the lens. Fig. 5A is a schematic diagram showing how light is collected by a single lens. Fig. 5B is a schematic diagram showing how light is collected by two lenses.

The light emitting region of the light emitting unit 25 has a surface shape instead of a dot shape. As shown in fig. 5A, in the case of a single lens, the degree to which light from the peripheral portion of the light-emitting region is diffused outside the corresponding lens is large. Therefore, there is a limitation in improving the light extraction efficiency, and the suppression of color mixture between adjacent pixels is also insufficient.

With the two-lens configuration as shown in fig. 5B, light from the peripheral portion of the light-emitting region can be sufficiently guided to the corresponding lens. Therefore, this configuration is superior to the configuration in fig. 5A in terms of light extraction efficiency and suppression of color mixing. Further, as shown in fig. 5B, qualitatively, it is preferable to make the front lens of the two lenses close to the light emitting region.

As described above, in the display device 1, the first microlenses 31A corresponding to each light emitting unit 25 and the second microlenses 31B arranged above the first lens units 30A are arranged. The color filter 50 is disposed between the first microlens 31A and the second microlens 31B. With this configuration, the first microlens 31A is disposed close to the light emitting unit 25.

As a configuration of the display device, it is conceivable to dispose the color filter 50 in a lower layer, but such a configuration is disadvantageous in disposing the first microlens 31A close to the light emitting unit 25. This will be explained with reference to fig. 6.

Fig. 6 is a schematic partial sectional view of a display device according to a reference example.

The display device 9 shown in fig. 6 has a configuration in which a color filter 50 is formed adjacent to the light emitting unit 25 and a first microlens 31A and a second microlens 31B are arranged above the color filter 50. In this case, since the color filter 50 is located between the first microlens 31A and the light emitting unit 25, the distance between the light incident surface and the light emitting surface of the first microlens 31A is larger than that in the configuration shown in fig. 2.

Meanwhile, in the display device 1 shown in fig. 2, the first microlenses 31A are arranged close to the light-emitting units 25. Therefore, since the light collecting capability of the first microlens 31A is sufficiently exhibited, it is advantageous in improving the light extraction efficiency and suppressing color mixing between adjacent pixels.

Hereinafter, an outline of a method for manufacturing the display device 1 will be described with reference to fig. 7A, 7B, 8A, 8B, 9, and 10, which are schematic partial end views of a substrate or the like.

[ step-100 ]

First, a MOSFET or the like serving as a drive circuit for the light emitting cell 25 is formed on the substrate 10, and the planarization film 20 is formed on the MOSFET (see fig. 7A).

[ step-110 ]

Next, an opening is formed in the planarization film 20 at a position where the contact plug 21 is to be arranged, and a conductive material layer constituting the anode electrode 22 is formed on the entire surface including the opening. After that, the conductive material layer is patterned to form the anode electrode 22 on the planarization film 20 (see fig. 7B).

[ step-120 ]

Next, the organic layer 23 is formed on the anode electrode 22 and the planarization film 20 by, for example, a PVD method (such as a vacuum deposition method or a sputtering method), a coating method (such as a spin coating method or a die coating method), or the like. After that, the cathode electrode 24 is formed on the entire surface based on, for example, a vacuum vapor deposition method (see fig. 8A).

[ step-130 ]

Next, the first lens unit 30A provided with the first microlens 31A corresponding to each light emitting unit 25 is formed on the entire surface (see fig. 8B).

[ step-140 ]

After that, the planarization film 40 is formed on the entire surface. Next, a color filter 50 is formed on the planarization film by a known method (see fig. 9).

[ step-150 ]

After that, the second lens unit 30B provided with the second microlens 31B corresponding to each light emitting unit 25 is formed on the entire surface (see fig. 10). Next, the transparent substrate 90 is attached via the sealing resin layer 60 made of, for example, an acrylic adhesive. This makes it possible to obtain the display device 1 shown in fig. 2.

The outline of the method for manufacturing the display device 1 is described above.

Various modifications are possible with respect to the first embodiment. Hereinafter, modifications will be described with reference to the drawings.

Fig. 11 is a schematic partial sectional view of a display device of a first modification of the first aspect.

The display device 1A according to the first modification has a configuration further including a third lens unit that is arranged above the second lens unit and is provided with a third microlens corresponding to each light emitting unit 25. More specifically, this is a configuration obtained by further arranging a third lens unit 30C having third microlenses 31C above the second lens unit 30B of the display device 1 shown in fig. 2. For convenience of explanation, the sealing resin layer 60 and the transparent substrate 90 are not shown in fig. 11. The same applies to fig. 12 and 13 described below.

Fig. 12 is a schematic partial sectional view of a display device according to a second modification of the first aspect.

The display device 1B according to the second modification has a configuration in which color filters are arranged between the first microlens and the second microlens and between the second microlens and the third microlens. More specifically, this is a configuration obtained by further arranging a color filter 50A between the second microlens 31B and the third microlens 31C of the display device 1B shown in fig. 11.

Fig. 13 is a schematic partial sectional view of a display device of a third modification of the first aspect.

The display device 1C according to the third modification has a configuration in which the planarization film 40 is omitted and the color filter 50 is formed in the display device 1 shown in fig. 2. This configuration can further improve the chroma-view-angle characteristics.

Various modifications of the first aspect have been described above.

In the above-described respective drawings, the widths of the microlenses are described as being substantially the same, but the widths of the microlenses do not necessarily have to be the same. Fig. 14 is a schematic sectional view for explaining the relationship between the light-emitting region width and the lens width. In order to effectively improve luminance, it is preferable that the width of the first microlens is equal to or greater than the width of the light emitting region, and the width of the second microlens is equal to or greater than the width of the first microlens.

Further, in the display device 1, the pixels may be arranged in an array other than, for example, a square array. As an example, the figure shows the arrangement of pixels of a modification in a triangular array. Fig. 15A and 15B are schematic plan views for explaining the arrangement relationship of various constituent elements in the pixel of the modification. Fig. 15A shows the arrangement relationship of the anode electrodes, and fig. 15B shows the arrangement relationship of the first microlenses. Fig. 16A and 16B are schematic plan views for explaining the arrangement relationship of various components in the pixel of the modification next to fig. 15B. Fig. 16A shows the arrangement relationship of the color filters, and fig. 16B shows the arrangement relationship of the second microlenses.

[ second embodiment ]

The second embodiment relates to a display device according to the second aspect of the present disclosure.

Fig. 17A and 17B are schematic diagrams of a display device according to the second aspect. Fig. 17A shows a schematic plan view of the display device, and fig. 17B shows a schematic cross-sectional view of the display device. Fig. 18 is a schematic partial cross-sectional view of a display device according to a second aspect.

As shown in fig. 17, the display device 2 includes a plurality of light emitting cells 25 arranged in a two-dimensional matrix on the substrate 10. The light emitting units 25 are arranged to correspond to the respective pixels 70 of the display device 2. The display device 2 includes a transparent substrate 90 disposed to face the substrate 10. Reference numeral 280A denotes a joint portion between the substrate 10 and the transparent substrate 90, which is disposed to surround the display area.

As shown in fig. 17 and 18, the display device 2 includes a columnar light guide portion 280 that is arranged above the plurality of light emitting units 25 and corresponds to each of the light emitting units 25. The partition wall portions BW are provided between the light guide portions 280 adjacent to each other. Similar to the display device 9 of the reference example shown in fig. 6 related to the first embodiment, the color filter 50 is formed adjacent to the light emitting unit 25, and the light guide portion 280 is disposed on the color filter 50. The configurations of the substrates 10 to the color filters 50 are the same as those described in the first embodiment, and thus the description thereof will be omitted.

In the display device 2, the partition wall portions BW are provided such that the refractive index thereof is smaller than that of the light guide portion 280, and the boundary surfaces between the partition wall portions BW and the light guide portion 280 form light reflecting surfaces. That is, when light from the light emitting unit 25 is incident on the boundary surface from the light guide portion 280 over the critical angle, the light is totally reflected and guided to the observer side. Therefore, it is possible to improve light extraction efficiency and suppress color mixing between adjacent pixels.

In the display device 2, the barrier rib portions BW are formed as spaces. Light directing portion 280 is formed of a dielectric material. More specifically, the light guide part 280 is formed of an organic material such as an acrylic resin material or a silicone resin material such as polysiloxane. The boundary surface between the partition wall BW and the light guide portion 280 is formed to extend in the normal direction of a virtual plane including the plurality of light emitting units 25. In some cases, a boundary surface between the barrier rib portions BW and the light guide portion 280 may be formed to extend at a predetermined angle with respect to a normal direction of a virtual plane including the plurality of light emitting units 25.

Fig. 19 is a schematic diagram for explaining reflection of light in the light guide portion.

The refractive index of the partition wall BW and the refractive index of the space are both denoted by the symbol n_airThe refractive index of light guide 280 is represented by symbol n₁Showing, and refraction of the transparent substrate 90The rate is represented by the symbol n₂And (4) showing. Here, let the refractive index n be assumed_air1. When the incident angle of light on the boundary surface (interface 1) is defined by the symbol θ₁When is represented, wherein Sin (theta)₁)≥1/n₁The light is totally reflected at the boundary surface, so that the light extraction efficiency is improved. Further, in fig. 19, the condition that light can be taken out to the outside at the interface 2 between the transparent substrate 90 and the outside is Sin (θ)₂)<1/n₂。

Snell's law at interface 3 is expressed as

Sin(π/2-θ₁)/Sin(θ₂)＝n₂/n₁。

When this formula is converted into a form of a formula,

obtaining Sin (theta)₂)＝(n₁/n₂)×(1-Sin2(θ₁))^1/2，

And by substituting it into Sin (theta) described above₂)<1/n₂And the arrangement is re-arranged so that,

obtaining Sin (theta)₁)>(1-(1/n₁)2)^1/2。

Therefore, if 1/n is set₁＝(1-(1/n₁)2)^1/2The amount of light that can be extracted is maximized. Therefore, n is preferably set₁＝2^1/2The value of (c).

As described above, the substrate 10 of the display device 2 is provided with the joint portion 280A arranged to surround the area of the plurality of light emitting cells 25 arranged in the two-dimensional matrix. The height of the joining portion 280A is formed to be the same as the height of the light guide portion 280. More specifically, the joining portion 280A and the light guide portion 280 are formed by patterning the same material layer. As described below, the display device 2 also has an advantage that so-called narrow framing is easily performed.

When the substrate 10 and the transparent substrate 90 are sealed with molten glass or the like, there is a limitation in narrowing the frame, for example, because the melting of the molten glass has an influence on the organic layer 23 and it is difficult to apply the molten glass in a narrow width. Further, even if bonding is performed at room temperature under a low pressure condition such as vacuum, if bonding is performed without the light guide part 280, the internal pressure is low, so that the substrate 10 and the transparent substrate 90 are deformed. Also, since the configuration is hollow, light extraction efficiency is reduced.

In contrast, in the display device 2, even if bonding is performed at room temperature under a low pressure condition such as vacuum, the distance between the substrate 10 and the transparent substrate 90 is maintained by the large number of light guide portions 280. Therefore, the frame can be narrowed while preventing the substrate 10 and the transparent substrate 90 from being deformed.

Hereinafter, an outline of a method for manufacturing the display device 2 will be described with reference to fig. 20A, 20B, 20C, 21A, 21B, 22A, and 22B as schematic partial end views of a substrate or the like.

[ step-200 ]

First, a driving circuit of the light emitting unit 25, the color filter 50, and the like are formed on the substrate 10 (see fig. 20A). For convenience, transistors forming a driving circuit, the light emitting unit 25, the color filter 50, and the like are illustrated in a simple manner.

[ step-210 ]

Next, the same material layer constituting the joining portion 280A and the light guide portion 280 is formed on the entire surface, and then the joining portion 280A and the light guide portion 280 are formed by a well-known patterning technique (see fig. 20B).

[ step-220 ]

After that, in order to improve the adhesiveness at normal temperature, an inorganic film AL1 is formed on the upper surface of the bonding portion 280A provided on the substrate 10 (refer to fig. 20C), and an inorganic film AL2 is formed on a portion of the transparent substrate 90 corresponding to the bonding portion 280A (refer to fig. 21A and 21B). The inorganic film may be formed as a thin film of silicon (Si), titanium (Ti), copper (Cu), or the like.

[ step-230 ]

Next, the inorganic film AL1 of the substrate 10 and the inorganic film AL2 of the transparent substrate 90 were activated. For example, they may be activated by irradiation with Ar plasma (see fig. 22A).

[ step-240 ]

After that, the substrate 10 and the transparent substrate 90 are set to face each other, and bonded in a vacuum at normal temperature (see fig. 22B). As a result, the display device 2 can be obtained. Since it is sufficient that the space of the partition wall portions BW is under a low pressure condition such as vacuum and the inorganic film is formed to have a sufficiently small thickness, the upper surface of the light guide portion 280 and the transparent substrate 90 are in close contact with each other.

In the above-described step-220, the adhesive layer is formed in a limited manner. Meanwhile, for example, by performing oblique vapor deposition, a configuration in which an inorganic film is formed not only on the upper surface of the joining portion but also on the upper surface of the light guide portion can be obtained. Hereinafter, with reference to fig. 23A, 23B, and 23C, an outline of a modification of the method for manufacturing the display device 2 will be described.

First, the above-mentioned steps-200 to-220 are performed. Then, for example, the inorganic film is formed not only on the upper surface of the joining portion 280A but also on the upper surface of the light guide portion 280 by performing oblique vapor deposition (see fig. 23A). Further, an inorganic film is also formed in the portion of the transparent substrate 90 corresponding to the joint portion 280A and in the region surrounded thereby (see fig. 23B). Then, the display device 2 can be obtained by performing the above-described steps-230 and-240 (see fig. 23C).

The outline of the method for manufacturing the display device 2 is described above.

The second embodiment can also be modified in various ways. Hereinafter, modifications are explained with reference to the drawings.

Fig. 24 is a schematic partial sectional view of a display device of a first modification of the second aspect.

The display device 2A according to the second modification has a configuration in which a color filter is arranged between a light guide portion and a transparent substrate. An outline of a method for manufacturing the display device 2A will be described below with reference to fig. 25A, 25B, 25C, 26A, 26B, and 26C.

[ step-200A ]

First, a driving circuit for the light emitting unit 25, and the like are formed on the substrate 10 (see fig. 25A). Next, the above-described steps 220 are performed to form the light guide portion 280 and the joining portion 280A (see fig. 25B).

[ step-210A ]

Further, the color filter 50 is formed on the transparent substrate 90 (see fig. 25C). If necessary, an overcoat layer 291 is formed to cover the color filter 50. In fig. 24, the protective layer 291 is not shown.

[ step-220A ]

By performing the above-described step-220, the inorganic film AL1 is formed on the upper surface of the joint 280A provided on the substrate 10 (see fig. 26A), and the inorganic film AL2 is formed on the portion of the transparent substrate 90 corresponding to the joint 280A (see fig. 26B).

[ step-230A ]

The display device 2A (see fig. 26C) can be obtained by performing the above-described steps-230 and-240.

Further, for example, the display device 2A may be configured not only by forming an inorganic film on the upper surface of the bonding portion but also by forming an inorganic film on the upper surface of the light guide portion by oblique evaporation. An outline of a method for manufacturing the display device 2A will be described below with reference to fig. 27A, 27B, and 27C.

First, the above-described step-200A and step-210A are performed. Then, for example, oblique vapor deposition is performed, whereby an inorganic film is formed not only on the upper surface of the bonding portion 280A but also on the upper surface of the light guide portion 280 (see fig. 27A). Further, an inorganic film is formed in a region surrounded by the portion of the transparent substrate 90 other than the portion corresponding to the joining portion 280A (see fig. 27B). The display device 2A (see fig. 27C) can be obtained by performing the above-described steps-230 and-240.

[ third embodiment ]

A third embodiment relates to a display device according to the second aspect of the present disclosure.

Fig. 28 is a schematic partial sectional view of a display device according to a third embodiment. In a schematic plan view of a display device according to a third embodiment, in fig. 17A mentioned in the second embodiment, the light guide portion 280 may be read as the light guide portion 380, and the joining portion 280A may be read as the joining portion 80.

As shown in fig. 28, the display device 3 includes a columnar light guide portion 380 arranged above the plurality of light emitting units 25 and corresponding to each light emitting unit 25. The partition wall portions BW are provided between the light guide portions 380 adjacent to each other. Similar to the display device 9 of the reference example shown in fig. 6 related to the first embodiment, the color filter 50 is formed adjacent to the light emitting unit 25, and the light guide portion 380 is disposed on the color filter 50. The configurations of the substrates 10 to the color filters 50 are the same as those described in the first embodiment, and thus the description thereof will be omitted.

The light guide part 380 includes at least a first microlens 381 above the light emitting unit 25 and a second microlens above the first microlens 381. The partition wall portion BW is embedded in the filling layer 382 provided between the first microlens 381 and the second microlens 383, and is provided so that its refractive index is smaller than that of the filling layer 382.

A configuration in which the color filter 50 is disposed between the light emitting unit 25 and the first microlens 381, between the first microlens 381 and the second microlens 383, and above the second microlens 383 can be obtained. In the example shown in fig. 28, the color filter 50 is arranged between the light emitting unit 25 and the first microlens 381.

Similarly to the second embodiment, the display device 3 may also be configured such that a light reflecting surface is formed at the boundary surface of the partition wall portion and the light guide portion. The reflection may be a so-called total reflection or specular reflection. In the case of total reflection, the barrier rib portion may be formed as a space or may be formed of a dielectric material having a low refractive index. In the case of specular reflection, the partition wall part may be made of a metal material having a large light reflectance, such as aluminum.

In the third embodiment, the advantages of the first embodiment (such as the use of the first and second microlenses 381 and 383) and the advantages of the second embodiment (such as reflection of light at the boundary surface between the partition wall portion and the light guide portion) can be obtained in combination.

Hereinafter, an outline of a method for manufacturing the display device 3 will be described with reference to fig. 29A, 29B, 30, 31, 32, 33, 34, 35, 36, 37, and 38, which are schematic partial end views of a substrate or the like.

[ step-300 ]

Steps-100 to-120 described in the first embodiment are performed to obtain the substrate 10 on which the light emitting unit 25 is formed (see fig. 29A). After that, the color filter 50 is formed on the substrate 10 (see fig. 29B).

[ step-310 ]

Next, a material layer 381A for configuring the first microlenses 381 is formed over the entire surface (see fig. 30), and exposure is performed via a gray-tone mask GTM (see fig. 31). Then, development is performed to obtain the first microlenses 381 (see fig. 32).

[ step-320 ]

Next, a filling material layer 382A for forming light guide portions 380 and barrier rib portions BW is formed on the entire surface (see fig. 33), and exposure is performed through a mask MSK in which portions corresponding to the light guide portions 380 are opened (see fig. 34). Then, development is performed to obtain the filling layer 382 and the barrier rib portions BW (see fig. 35). Here, the partition wall portions BW are described as spaces, but when the partition wall portions BW are configured of a dielectric material or a metal material, these materials may be embedded in the partition wall portions BW formed as the spaces.

[ step-330 ]

Next, a material layer 383A for configuring the second microlenses 383 is formed over the entire surface (see fig. 36), and exposure is performed via a gray-tone mask GTM (see fig. 37). Then, development is performed to obtain second microlenses 383 (see fig. 38).

[ step-340 ]

Next, the display device 3 can be obtained by bonding the substrate 10 and the transparent substrate 90 together through the sealing resin layer 60.

The outline of the method for manufacturing the display device 3 is described above.

Various modifications are also possible with the third embodiment. Hereinafter, modifications are explained with reference to the drawings.

Fig. 39 is a schematic partial sectional view of a display device according to a first modification of the third embodiment. Fig. 40 is a schematic partial sectional view of a display device according to a second modification of the third embodiment.

As described above, in the third embodiment, a configuration in which the color filter 50 is disposed between the light emitting unit 25 and the first microlens 381, between the first microlens 381 and the second microlens 383, or above the second microlens 383 can be obtained. In the display device 3A shown in fig. 39, the color filter 50 is arranged between the second microlenses 383 and the transparent substrate 90. Further, in the display device 3B shown in fig. 40, the color filter 50 is arranged between the first microlens 381 and the second microlens 383.

Qualitatively, as described in the first embodiment, it is preferable that the distance between the light emitting unit 25 and the first microlens 381 is small. In the display device 3 shown in fig. 28, the chromaticity viewing angle is improved, but the light extraction efficiency is slightly lowered. In the first modification and the second modification, the light extraction efficiency can be improved as compared with the structure shown in fig. 28. In the first modification, the chromaticity viewing angle is slightly reduced. Meanwhile, the second modification has an advantage that both the light extraction efficiency and the chromaticity viewing angle can be improved.

Fig. 41 is a schematic partial sectional view of a display device according to a third modification of the third embodiment.

In the display device 3C shown in fig. 41, the second microlenses 383 are of a concave lens type. When the second microlenses 383 are convex lenses, qualitatively, the front luminance tends to be higher than the peripheral luminance. For example, in the case of an application requiring brightness also on the wide viewing angle side, the divergence of the light beam toward the wide viewing angle side of the panel can be controlled by making the second microlenses 383 concave lenses.

[ electronic device ]

The display device of the present disclosure described above can be used as a display unit (display device) of an electronic device in all fields for displaying a video signal input to the electronic device or a video signal generated in the electronic device as an image or a video. As examples, the display device can be used as a display unit (such as a television, a digital camera), a notebook personal computer, a mobile terminal device (such as a mobile phone), a video camera, and a head-mounted display (head-mounted display unit).

The display device of the present disclosure also includes a modular device having a sealed configuration. Such a device may be exemplified by a display module formed by attaching a facing portion such as transparent glass to a pixel array portion. The display module may be provided with a circuit unit for inputting/outputting signals and the like to/from the pixel array unit from the outside, a Flexible Printed Circuit (FPC), and the like. Hereinafter, a digital still camera and a head mounted display will be shown as specific examples of an electronic device using the display device of the present disclosure. However, the specific examples shown here are merely examples and are not limiting.

(example 1)

Fig. 42 is an external view of an interchangeable-lens single-lens reflex type digital still camera, fig. 42A showing a front view thereof, and fig. 42B showing a rear view thereof. An interchangeable-lens single-lens reflex type digital still camera has, for example, an interchangeable imaging lens unit (interchangeable lens) 412 on the front right side of a camera body (body) 411 and a grip portion 413 held by a photographer on the front left side.

The monitor 414 is provided at a substantially central portion of the back surface of the camera body 411. A viewfinder (eyepiece window) 415 is provided above the monitor 414. By observing the viewfinder 415, the photographer can visually recognize the light image of the subject introduced from the imaging lens unit 412 and determine the composition.

The display device of the present disclosure can be used as the viewfinder 415 in the interchangeable-lens single-lens reflex type digital still camera having the above-described configuration. That is, the interchangeable-lens type single-lens reflex type digital still camera according to the present example can be produced by using the display device of the present disclosure as the viewfinder 415 thereof.

(example 2)

Fig. 43 is an external view of the head mounted display. The head-mounted display has, for example, ear-hook portions 512 that enable wearing on the head of the user on both sides of the glasses-shaped display unit 511. In this head mounted display, the display device of the present disclosure may be used as the display unit 511. That is, the head mounted display according to the present example can be manufactured by using the display device of the present disclosure as the display unit 511.

(example 3)

Fig. 44 is an external view of a see-through head mounted display. The see-through head mounted display 611 is configured by a main body 612, an arm 613, and a lens barrel 614.

The body 612 is connected to the arms 613 and the eyeglasses 600. Specifically, the end of the body 612 in the long side direction is joined to the arm 613, and one side of the body 612 is coupled to the glasses 600 via a connecting member. The body 612 may be directly attached to the head of a human body.

The main body 612 includes a control board and a display unit for controlling the operation of the see-through head mounted display 611. The arm 613 connects the main body 612 and the lens barrel 614, and supports the lens barrel 614. Specifically, the arms 613 are respectively connected to an end of the main body 612 and an end of the lens barrel 614 to fix the lens barrel 614. Further, the arm 613 includes a signal line for communicating data relating to an image supplied from the main body 612 to the lens barrel 614.

The lens barrel 614 projects image light provided from the main body 612 via the arm 613 to the eye of the user wearing the see-through head-mounted display 611 through an eyepiece. In this see-through head mounted display 611, the display apparatus of the present disclosure may be used for the display unit of the main body 612.

[ others ]

The technique of the present disclosure may also have the following configuration.

[A1]

A display device comprising at least:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate;

a first lens unit disposed over the plurality of light emitting units and having a first microlens corresponding to each of the light emitting units; and

and a second lens unit disposed above the first lens unit and having a second microlens corresponding to each light emitting unit.

[A2]

The display device of a1, wherein,

the color filter is disposed between the first and second microlenses.

[A3]

The display device according to A1, further comprising

And a third lens unit disposed above the second lens unit and having a third microlens corresponding to each light emitting unit.

[A4]

The display device of a3, wherein,

the color filters are disposed between the first and second microlenses and between the second and third microlenses, respectively.

[A5]

The display device of any one of A1-A4, wherein,

the refractive index of the material forming the first microlenses is greater than the refractive index of the material forming the second microlenses.

[A6]

The display device of a5, wherein,

the color filter is arranged between the first and second microlenses, and

the refractive index of the optical material forming the color filter is smaller than the refractive index of the optical material forming the first microlens and equal to or higher than the refractive index of the optical material forming the second microlens.

[A7]

The display device of A5 or A6, wherein,

the first microlenses are formed of an inorganic material, and the second microlenses are formed of an organic material.

[B1]

A display device, comprising:

a plurality of light emitting cells arranged in a two-dimensional matrix on a substrate; and

a columnar light guide part disposed above the plurality of light emitting units and corresponding to each of the light emitting units, wherein,

the partition wall is provided between the light guide portions adjacent to each other.

[B2]

The display device of B1, wherein,

the boundary surface between the partition wall and the light guide portion forms a light reflecting surface.

[B3]

The display device of B1 or B2, wherein,

the light guide part is formed of a dielectric material.

[B4]

The display device of B3, wherein,

the light guide part is made of an organic material.

[B5]

The display device according to any one of B1 to B4, wherein,

the partition wall portion is provided such that the refractive index thereof is smaller than that of the light guide portion.

[B6]

The display device according to any one of B1 to B5, wherein,

the partition wall portion is formed as a space.

[B7]

The display device according to any one of B1 to B6, wherein,

the partition wall portion is formed of a dielectric material.

[B8]

The display device of B1, wherein,

the partition wall portion is formed of a metal material.

[B9]

The display device according to any one of B1 to B8, wherein,

the boundary surface between the partition wall portion and the light guide portion extends in a normal direction of a virtual plane including the plurality of light emitting cells.

[B10]

The display device according to any one of B1 to B8, wherein,

a boundary surface between the partition wall portion and the light guide portion extends to form a predetermined angle with respect to a normal direction of a virtual plane including the plurality of light emitting cells.

[B11]

The display device of any one of B1-B10, comprising:

a transparent substrate disposed to face the substrate, wherein,

the substrate is provided with a bonding portion arranged to surround a region of the plurality of light emitting cells arranged in a two-dimensional matrix, and

the substrate and the transparent substrate are joined by a joining portion.

[B12]

The display device of B11, wherein,

the height of the joining portion is equal to the height of the light guide portion.

[B13]

The display device according to any one of B1 to B12, wherein,

the light guide part includes at least a first microlens positioned above the light emitting unit and a second microlens positioned on the first microlens.

[B14]

The display device of B13, wherein,

the partition wall portion is embedded in a filling layer provided between the first microlens and the second microlens, and is provided so that its refractive index is smaller than that of the filling layer.

[B15]

The display device of B13, wherein,

the color filter is disposed between the light emitting unit and the first microlens, between the first microlens and the second microlens, or over the second microlens.

[ list of reference numerals ]

11 A1B 1C 22a 33 A3B 3C 9 display device; 10a substrate; 11a component separating region; 12 source/drain regions; 13 a channel forming region; 14 a gate insulating layer; 15a gate electrode; 20a planarization film; 21 contact plugs; 22 an anode electrode; 23 an organic layer; 24 a cathode electrode; 25a light emitting unit; a 30A first lens unit; a 30B second lens unit; a 30C third lens unit; 31A first microlens; 31B second microlenses; 31C

A third microlens; 40 a planarization film; 50. 50R, 50G, 50B, 50A, 50AR, 50AG, 50AB color filters; 60 a sealing resin layer; 70. 70R, 70G, 70B pixels; 80a joint portion; 90 a transparent substrate; 280a light guide part; a 280A engagement portion; 380 a light guide part; 381 first microlens; 381A for forming a material layer of the first microlens; 382a filling layer; 382A filling material layer; 383 second microlenses; 383A for forming a layer of material for the second microlens; a BW partition wall portion; AL1, AL2 inorganic films; 411 a camera body; 412 a camera lens unit; 413 a gripping part; 414 a monitor; 415 a viewfinder; 511 glasses type display unit; 512 ear-hook parts; 600 glasses; 611 see-through head mounted display; 612 a main body; 613 arms; 614 lens barrel.