Display device

Abstract

To provide a display device capable of suppressing deterioration of display quality.SOLUTION: A display device according to one embodiment comprises: a plurality of light-emitting elements; a plurality of lenses overlapping the plurality of light-emitting elements; and a first protective layer between the plurality of light-emitting elements and the plurality of lenses, which has a first main surface on which the plurality of lenses is arranged. The first main surface has a concave-convex pattern including a plurality of protrusion parts protruding toward the plurality of lenses.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a display device. [Background technology]

[0002] In recent years, display devices using light-emitting elements such as organic EL elements and light-emitting diodes have been proposed. In order to extract light emitted from these light-emitting elements more efficiently, a lens may be further disposed above the light-emitting elements. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-307090 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a display device that can suppress a decrease in display quality. [Means for solving the problem]

[0005] A display device according to one embodiment includes a plurality of light-emitting elements, a plurality of lenses overlapping the plurality of light-emitting elements, and a first protective layer between the plurality of light-emitting elements and the plurality of lenses, the first protective layer having a first main surface on which the plurality of lenses are disposed, The first main surface has an uneven pattern including a plurality of protrusions protruding toward the plurality of lenses.

[0006] A display device according to another embodiment includes a plurality of light-emitting elements, a plurality of lenses overlapping the plurality of light-emitting elements, a first protective layer disposed between the plurality of light-emitting elements and the plurality of lenses, and a base layer disposed between the first protective layer and the plurality of lenses and having a second main surface on which the plurality of lenses are disposed, wherein the base layer has at least one of greater oil repellency than the first protective layer or greater water repellency than the first protective layer.

[0007] According to yet another embodiment, a display device includes a plurality of light-emitting elements, a plurality of lenses overlapping the plurality of light-emitting elements, a first protective layer having a first main surface on which the plurality of lenses are disposed between the plurality of light-emitting elements and the plurality of lenses, and a bank layer disposed on the first main surface and having a refractive index equivalent to that of the lenses, wherein the bank layer has openings overlapping the lenses. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic plan view showing a display device according to a first embodiment. [Figure 2] FIG. 2 is a plan view showing an example of the layout of the light emitting elements and lenses. [Figure 3] FIG. 3 is a cross-sectional view showing an example of the configuration of the display device according to the first embodiment. [Figure 4] FIG. 4 is a diagram for explaining the concave-convex pattern. [Figure 5] FIG. 5 is a diagram for explaining the manufacturing process of the display device. [Figure 6] FIG. 6 is a diagram for explaining the manufacturing process of the display device. [Figure 7] FIG. 7 is a diagram for explaining the manufacturing process of the display device. [Figure 8] FIG. 8 is a diagram for explaining the manufacturing process of the display device. [Figure 9] FIG. 9 is a diagram for explaining another example of the concave-convex pattern. [Figure 10]FIG. 10 is a diagram for explaining still another example of the concave-convex pattern. [Figure 11] FIG. 11 is a diagram for explaining still another example of the concave-convex pattern. [Figure 12] FIG. 12 is a schematic cross-sectional view showing a display device according to the second embodiment. [Figure 13] FIG. 13 is a schematic cross-sectional view showing a display device according to the third embodiment. [Figure 14] FIG. 14 is a schematic cross-sectional view showing a display device according to the third embodiment. [Figure 15] FIG. 15 is a schematic cross-sectional view showing a display device according to the fourth embodiment. [Figure 16] FIG. 16 is a diagram for explaining the pattern of the bank layer. [Figure 17] FIG. 17 is a diagram for explaining the pattern of the bank layer. [Figure 18] FIG. 18 is a schematic cross-sectional view showing a display device according to the fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment will be described below with reference to the drawings. The disclosure is merely an example, and appropriate modifications that a person skilled in the art can easily make while maintaining the gist of the invention are naturally included within the scope of the present invention. Furthermore, the drawings may be schematic in terms of the width, thickness, shape, etc. of each part compared to the actual embodiment for clarity of explanation, but these are merely examples and are not intended to limit the interpretation of the present invention. Furthermore, in this specification and each drawing, components that perform the same or similar functions as those described above with reference to the previous drawings are designated by the same reference numerals, and redundant detailed descriptions may be omitted as appropriate.

[0010] In the drawings, mutually perpendicular X, Y, and Z axes are shown as necessary to facilitate understanding. The direction along the X axis is referred to as the first direction X, the direction along the Y axis is referred to as the second direction Y, and the direction along the Z axis is referred to as the third direction Z. Viewing various elements parallel to the third direction Z is referred to as a planar view.

[0011] [First embodiment] 1 is a schematic plan view showing a display device DSP according to this embodiment. The display device DSP includes a display panel 1. The display panel 1 has a display area DA where an image is displayed and a frame-shaped peripheral area SA that surrounds the display area DA. The display area DA and the peripheral area SA are formed on an insulating substrate.

[0012] 1, the display panel 1 has a rectangular shape that is elongated in the second direction Y. However, the shape of the display panel 1 is not limited to this example, and may be, for example, a rectangular shape that is elongated in the first direction X, a square shape, a circle shape, an ellipse shape, or the like.

[0013] The display device DSP includes a plurality of light-emitting elements LD arranged in a matrix in a first direction X and a second direction Y. The plurality of light-emitting elements LD are arranged in a display area DA. The light-emitting elements LD adjacent to each other in the first direction X or the light-emitting elements LD adjacent to each other in the second direction Y are spaced apart from each other.

[0014] 2 is a plan view showing an example of the layout of the light-emitting element LD and lenses LS1 and LS2. The light-emitting element LD has a light-emitting element LC1 of a first color, a light-emitting element LC2 of a second color, and a light-emitting element LC3 of a third color. The first color, the second color, and the third color are, for example, different colors from one another. For example, the first color is red, the second color is green, and the third color is blue, but this example is not limiting.

[0015] 2, the light-emitting elements LC1 and LC2 are aligned in the second direction Y. The light-emitting elements LC1 and LC3 are aligned in the first direction X, and the light-emitting elements LC2 and LC3 are aligned in the first direction X.

[0016] When the light-emitting elements LC1, LC2, and LC3 are laid out in this manner, the display area DA is formed with a row in which the light-emitting elements LC1 and the light-emitting elements LC2 are alternately arranged in the second direction Y, and a row in which a plurality of light-emitting elements LC3 are repeatedly arranged in the second direction Y. These rows are arranged alternately in the first direction X.

[0017] The display device DSP further includes color filters CF1, CF2, and CF3, which overlap the plurality of light-emitting elements LC1, LC2, and LC3, respectively.

[0018] The display device DSP further includes a plurality of lenses LS1 and LS2. These lenses LS1 and LS2 are sometimes called microlenses. The lenses LS1 and LS2 have the function of converting light emitted from the light-emitting element LD into light along the third direction Z and extracting the light to the outside of the display panel 1 (shown in FIG. 1).

[0019] The lenses LS1 and LS2 are convex lenses that protrude in the third direction Z. Specifically, the lenses LS1 and LS2 are aspheric lenses. The lens LS1 has a substantially circular shape in a plan view. The substantially circular shape includes a circular shape, an elliptical shape, an oval shape, and the like. In the example shown in FIG. 2, the lens LS1 has an elliptical shape.

[0020] One lens LS1 overlaps one light-emitting element LC1, and one lens LS1 overlaps one light-emitting element LC2. The light-emitting elements LC1 and LC2 do not protrude from the lens LS1 in plan view.

[0021] In one example, the lens LS2 is a cylindrical lens. In a plan view, the lens LS2 has an elongated shape extending in the second direction Y. One lens LS2 overlaps multiple light-emitting elements LC3. In a plan view, the light-emitting elements LC3 do not protrude from the lens LS2. The light-emitting elements LC1, LC2, and LC3, the color filters CF1, CF2, and CF3, and the lenses LS1 and LS2 are arranged in this order in the third direction Z.

[0022] Next, a configuration example of the display device DSP will be described using a cross-sectional structure. In the following configuration example, the configuration of the main part will be described with reference to a cross-sectional view of an area including mainly one light-emitting element LC1 among the multiple light-emitting elements LD arranged in the display area DA.

[0023] 3 is a cross-sectional view showing an example of the configuration of a display device DSP according to this embodiment. The display device DSP further includes a substrate 11, a circuit layer 12, an insulating layer 13, a sealing layer 14, a resin layer 15, a light-shielding layer BM, and a first protective layer 21.

[0024] The insulating substrate 11 may be glass or a flexible resin film. The circuit layer 12 is disposed on the substrate 11. The circuit layer 12 includes, for example, various circuits such as pixel circuits, various wirings such as scanning lines, signal lines, and power supply lines, and various insulating layers.

[0025] The light-emitting element LD is, for example, an organic EL element (organic light-emitting diode (OLED)). Note that the light-emitting element LD is not limited to an organic EL element, and may be a micro LED, a mini LED, or the like.

[0026] Here, the light-emitting element LC1 will be described, but the other light-emitting elements LC2 and LC3 have a similar structure. The light-emitting element LC1, which is an organic EL element, includes a lower electrode LE, an organic layer OR, and an upper electrode UE.

[0027] The lower electrode LE is disposed on the circuit layer 12. The lower electrode LE is a multilayer body including, for example, a transparent layer formed of an oxide conductive material such as indium tin oxide (ITO) and a reflective layer formed of a metal material such as silver.

[0028] The organic layer OR is disposed on the lower electrode LE. The organic layer OR includes an emitting layer and various functional layers such as a hole injection layer, a hole transport layer, an electron blocking layer, an electron transport layer, and an electron injection layer. The upper electrode UE is disposed on the organic layer OR. The upper electrode UE is formed of a metal material such as an alloy of magnesium and silver (MgAg).

[0029] The insulating layer 13 is formed so as to surround a part of the light-emitting element LC1. The insulating layer 13 is disposed between the adjacent light-emitting elements LC1, LC2, and LC3. The sealing layer 14 covers the light-emitting element LC1 and the insulating layer 13.

[0030] The resin layer 15 is disposed on the sealing layer 14. The resin layer 15 has the function of flattening unevenness caused by the light-emitting element LD, the insulating layer 13, etc. The insulating layer 13, the sealing layer 14, and the resin layer 15 are formed of an inorganic insulating material such as silicon nitride. Note that the resin layer 15 may include a layer formed of an organic insulating material in addition to a layer formed of an inorganic insulating material.

[0031] The color filters CF1 and CF3 are disposed on the resin layer 15. The color filter CF1 is formed of a resin material colored red, for example, and the color filter CF3 is formed of a resin material colored blue, for example.

[0032] The color filter CF1 is disposed directly above the light-emitting element LC1 in the third direction Z. The color filter CF3 is disposed directly above the light-emitting element LC3 (not shown) in the third direction Z.

[0033] The color filter CF2 (shown in Fig. 2) is disposed directly above the light emitting element LC2 shown in Fig. 2. The color filter CF2 is formed of a resin material that is colored green, for example.

[0034] For example, red light emitted from light-emitting element LC1 passes through color filter CF1. In contrast, blue light emitted from light-emitting element LC3 is absorbed by color filter CF1. This prevents color mixing of light and reduces degradation of display quality. Furthermore, color filters CF1, CF2, and CF3 can prevent reflection of external light.

[0035] The light-shielding layer BM is disposed on the resin layer 15. In other words, the light-shielding layer BM is disposed between the resin layer 15 and the color filters CF1 and CF3. Focusing on the color filters CF1 and CF3, the light-shielding layer BM overlaps the peripheral portions of the color filters CF1 and CF3. Although not shown, the light-shielding layer BM also overlaps the peripheral portions of the color filters CF1 and CF2 and the peripheral portions of the color filters CF2 and CF3.

[0036] Focusing on the lenses LS1 and LS2, the light-shielding layer BM is disposed between the adjacent lenses LS1 and LS2. Although not shown, the light-shielding layer BM is also disposed between the adjacent lenses LS1. Note that the light-shielding layer BM may overlap each of the lenses LS1 and LS2 in the third direction Z.

[0037] The first protective layer 21 is disposed on the color filters CF1 and CF3. In other words, the color filters CF1, CF2, and CF3 are disposed between the light-emitting elements LC1, LC2, and LC3 and the first protective layer 21.

[0038] The first protective layer 21 is, for example, a transparent organic insulating layer, and is formed from a resin material such as an acrylic resin, an epoxy resin, a polyimide resin, etc. The first protective layer 21 may be formed from a material other than these.

[0039] The first protective layer 21 has a first main surface 23 on which a plurality of lenses LS1 and LS2 are arranged. The plurality of lenses LS1 and LS2 are in contact with the first main surface 23. The first main surface 23 has a concave-convex pattern PT.

[0040] The concave-convex pattern PT is formed by, for example, performing half exposure in the area where the concave-convex pattern PT is to be formed when forming the first protective layer 21. The concave-convex pattern PT includes a plurality of protrusions 25. The protrusions 25 protrude in the third direction Z toward the lenses LS1 and LS2.

[0041] An example of the concave-convex pattern PT will now be described with reference to Fig. 4. Fig. 4 is a diagram for explaining the concave-convex pattern PT. Fig. 4 shows only one lens LS1 out of the multiple lenses LS1 and LS2.

[0042] In the example shown in Fig. 4, the concave-convex pattern PT is formed in a dot pattern by a plurality of protrusions 25 in a planar view. The lens LS1 overlaps the plurality of protrusions 25. The shape of the protrusions 25 is quadrangular in a planar view, but may be other polygonal, circular, or elliptical shapes. It is preferable that the size of the plurality of protrusions 25 is as small as possible.

[0043] Next, the spacing between adjacent protrusions 25 will be described with reference to Fig. 4. As shown in Fig. 4, the spacing between adjacent protrusions 25 in the first direction X is defined as spacing DX1 and spacing DX2, and the spacing between adjacent protrusions 25 in the second direction Y is defined as spacing DY1 and spacing DY2.

[0044] In the plurality of protrusions 25, when attention is paid to the intervals DX1, DX2 and the intervals DY1, DY2, for example, the interval DX1 is different from the interval DX2, and the interval DY1 is different from the interval DY2. Note that the intervals between adjacent protrusions 25 may all be equal, or may have both equal and different intervals.

[0045] 3, the lenses LS1 and LS2 are disposed on the concave-convex pattern PT of the first protective layer 21. In other words, the first protective layer 21 is disposed between the plurality of light-emitting elements LD and the plurality of lenses LS1 and LS2.

[0046] 3, a portion of each of the lenses LS1 and LS2 is located between adjacent protrusions 25. Between the adjacent lenses LS1 and LS2, the first main surface 23 of the first protective layer 21 is exposed.

[0047] The lenses LS1 and LS2 are formed of, for example, a transparent resin material. In terms of refractive index, the lenses LS1 and LS2 have a higher refractive index than the first protective layer 21. For example, if the refractive index of the first protective layer 21 is 1.5, the refractive index of the lenses LS1 and LS2 is higher than 1.5.

[0048] Next, the manufacturing process of the lens LS1 among the manufacturing processes of the display device DSP will be described with reference to Figures 5 to 8. Figures 5 to 8 are diagrams for explaining the manufacturing process of the display device DSP. Here, the lens LS1 will be described as an example, but the lens LS2 is formed in the same way.

[0049] 5, a lens material LNM for forming the lens LS1 is applied onto the first protective layer 21 (first step ST1). The lens material LNM is, for example, a negative resin material.

[0050] After the first step ST1, as shown in Fig. 6, a mask MK having an opening of a predetermined shape is placed on the lens material LNM. Then, light L1 is irradiated through the mask MK to expose the lens material LNM (second step ST2). The light L1 is, for example, ultraviolet light.

[0051] After the second step ST2, the lens material LNM is developed (third step ST3) as shown in Fig. 7. In the example shown in Fig. 7, the area of ​​the lens material LNM exposed to the light L1 remains, and the area shielded by the mask MK is removed.

[0052] 8, the remaining lens material LNM is baked (fourth step ST4). In the fourth step ST4, when the lens material LNM reflows, it takes on a convex lens shape due to surface tension, and hardens in that state to form a lens LS1.

[0053] In the fourth step ST4, if the lens material LNM spreads more than necessary on the first main surface 23, it becomes difficult to stably manufacture the lens LS1 having the desired shape, which makes it difficult to obtain a lens having the desired optical performance.

[0054] Furthermore, when the display device DSP has high resolution, the light emitting elements LD become smaller (for example, the width is 6 μm or less), and the interval between adjacent light emitting elements LD also becomes smaller. Therefore, there is a risk that adjacent lens materials LNM will be connected to each other during reflow.

[0055] In this embodiment, the lenses LS1 and LS2 are disposed on the concave-convex pattern PT on the first main surface 23 of the first protective layer 21. More specifically, the lenses LS1 and LS2 overlap the multiple protrusions 25 that form the concave-convex pattern PT.

[0056] During reflow, the plurality of protrusions 25 can prevent the lens material LNM from spreading more than necessary on the first main surface 23. For example, spreading can be prevented by air getting in between adjacent protrusions 25. This can prevent adjacent pieces of lens material LNM from joining together.

[0057] By suppressing the spread of the lens material LNM in this way, it is possible to stably manufacture lenses LS1 and LS2 having the desired shapes, or in other words, lenses LS1 and LS2 having the desired optical performance.

[0058] As a result, it is possible to suppress a decrease in the extraction efficiency of the light emitted from the light emitting element LD, improve the brightness, and suppress a decrease in the display quality of the display device DSP. In addition, various other advantageous effects can be obtained from this embodiment.

[0059] In this embodiment, an example in which the concave-convex pattern PT is formed in a dot shape has been described, but the concave-convex pattern PT is not limited to this example. Figures 9 to 11 are diagrams for explaining other examples of the concave-convex pattern PT. Figures 9 to 11 show only one lens LS1 out of the multiple lenses LS1 and LS2.

[0060] 9, the concave-convex pattern PT is formed in a striped pattern by a plurality of protrusions 25 in a plan view. The plurality of protrusions 25 extend in the second direction Y and are aligned in the first direction X. The plurality of protrusions 25 may also be formed to extend in the first direction X and be aligned in the second direction Y. The lens LS1 overlaps the plurality of protrusions 25.

[0061] In this case, it is preferable to arrange the plurality of protrusions 25 along a direction perpendicular to the direction in which reflow is not desired. For example, if the direction in which reflow is not desired is the first direction X, it is preferable to arrange the plurality of protrusions 25 so that they extend in the second direction Y.

[0062] 10, the concave-convex pattern PT is formed in a grid shape by a plurality of protrusions 25 in a plan view. Specifically, the plurality of protrusions 25 extend in the first direction X and have a plurality of first portions 25X aligned in the second direction Y, and a plurality of second portions 25Y extending in the second direction Y and aligned in the first direction X. The lens LS1 overlaps the plurality of first portions 25X and second portions 25Y.

[0063] In the example shown in Fig. 11, the concave-convex pattern PT is formed by a plurality of annular protrusions 25 in a planar view. Fig. 11 shows one of the plurality of protrusions 25. In the example shown in Fig. 11, the protrusion 25 has an elliptical shape similar to the shape of the lens LS1.

[0064] The shape of the protrusions 25 in a plan view may be circular or polygonal. Focusing on the lenses LS1, one protrusion 25 overlaps one lens LS1. The outer shape of the protrusions 25 is smaller than the outer shape of the lenses LS1.

[0065] In the uneven pattern PT described using Figures 9 to 11, as in the case shown in Figure 4, when the lens material LNM reflows, the protrusions 25 can prevent the lens material LNM from spreading over the first main surface 23.

[0066] In this embodiment, an example has been described in which the lenses LS1 and LS2 are aspherical lenses, but the present invention is not limited to this example and can be applied to lenses other than these types.

[0067] In the present embodiment, an example has been described in which the display device DSP includes color filters CF1, CF2, and CF3 and a light-shielding layer BM, but the display device DSP does not necessarily have to include at least one of the color filters CF1, CF2, and CF3 and the light-shielding layer BM. Also, the display device DSP may further include a light-shielding layer between the color filters CF1, CF2, and CF3 and the lenses LS1 and LS2.

[0068] In the present embodiment, the first protective layer 21 is formed from a single material, but is not limited to this example. The first main surface 23 may have a concave-convex pattern PT with a plurality of protrusions 25 formed from a material different from that of the portion in contact with the color filters CF1, CF2, and CF3.

[0069] The plurality of protrusions 25 are formed of, for example, silicon oxide. By forming the plurality of protrusions 25 from such a material, the size of the plurality of protrusions 25 can be further reduced. For example, the interval between adjacent protrusions 25 can be set to 1 μm or less, and the length of each protrusion 25 in the third direction Z can be set to 1 μm or less.

[0070] Next, other embodiments will be described. In the other embodiments described below, the same components as those in the first embodiment described above will be denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof may be omitted or simplified.

[0071] [Second embodiment] 12 is a schematic cross-sectional view showing a display device DSP according to this embodiment. This embodiment differs from the first embodiment in that the display device DSP further includes a base layer 31.

[0072] The display device DSP includes an underlayer 31 disposed on the first protective layer 21. From another perspective, the underlayer 31 is disposed between the first protective layer 21 and the plurality of lenses LS1 and LS2.

[0073] The base layer 31 has a second main surface 33 on which a plurality of lenses LS1 and LS2 are arranged. The plurality of lenses LS1 and LS2 are in contact with the second main surface 33. The second main surface 33 corresponds to the surface opposite to the surface facing the first main surface 23 of the first protective layer 21. In this embodiment, the first main surface 23 and the second main surface 33 are flat surfaces.

[0074] The second main surface 33 has at least one of oil repellency and water repellency. Specifically, the second main surface 33 has at least one of greater oil repellency than the first main surface 23 of the first protective layer 21, and greater water repellency than the first main surface 23 of the first protective layer 21.

[0075] The second main surface 33 only needs to have greater oil repellency than the first main surface 23 of the first protective layer 21, and may have both greater oil repellency and greater water repellency than the first main surface 23 of the first protective layer 21. The base layer 31 is formed of a fluorine-based organic compound or silicon oxide.

[0076] In terms of refractive index, the refractive index of the base layer 31 is equivalent to the refractive index of the first protective layer 21. Here, "equivalent" does not necessarily mean that the difference in refractive index is zero, but also includes a case where the difference in refractive index is 0.1 or less. From another perspective, the refractive index of the lenses LS1 and LS2 is greater than the refractive index of the base layer 31.

[0077] The configuration of this embodiment also provides the same effects as those of Embodiment 1. In this embodiment, the plurality of lenses LS1 and LS2 are disposed on the base layer 31.

[0078] For example, when the lens material LNM is placed on a layer made of a lipophilic material (such as acrylic resin), the contact angle with the layer becomes small during reflow, and the lens material LNM easily spreads.

[0079] In contrast, in this embodiment, the base layer 31 has greater oil repellency or water repellency than the first protective layer 21. This makes it possible to increase the contact angle with the second main surface 33 during reflow, making it difficult for the lens material LNM to spread. As a result, lenses LS1 and LS2 having the desired shapes can be stably manufactured.

[0080] [Third embodiment] 13 and 14 are schematic cross-sectional views showing a display device DSP according to this embodiment. This embodiment differs from the above-described embodiments in that the display device DSP further includes a second protective layer 41.

[0081] The display device DSP further includes a second protective layer 41. The second protective layer 41 has a function of flattening unevenness caused by the plurality of lenses LS1 and LS2.

[0082] 13, the second protective layer 41 covers the lenses LS1, LS2 and the first protective layer 21. In other words, the lenses LS1, LS2 and the first protective layer 21 are not exposed from the second protective layer 41.

[0083] 14, the second protective layer 41 covers the lenses LS1, LS2 and the foundation layer 31. In other words, the lenses LS1, LS2 and the foundation layer 31 are not exposed from the second protective layer 41.

[0084] In terms of refractive index, the refractive index of second protective layer 41 is smaller than the refractive indexes of lenses LS1 and LS2, first protective layer 21, and second protective layer 41. Second protective layer 41 is a transparent organic insulating layer, and is formed from a resin material such as acrylic resin, epoxy resin, or polyimide resin.

[0085] 13 and 14, the display device DSP may further include an optical film 51. The optical film 51 covers the second protective layer 41. The optical film 51 is, for example, a polarizing plate, but is not limited to this example.

[0086] The configuration of this embodiment can also achieve the same effects as the above-described embodiments. Furthermore, in this embodiment, the display device DSP includes a second protective layer 41. This can protect the lenses LS1 and LS2 from external impacts and the like.

[0087] [Fourth embodiment] 15 is a schematic cross-sectional view showing a display device DSP according to this embodiment. This embodiment differs from the first embodiment in that the display device DSP includes a bank layer 61.

[0088] The display device DSP includes a bank layer 61 disposed on the first main surface 23 of the first protective layer 21. The first main surface 23 in this embodiment is a flat surface.

[0089] The bank layer 61 has an opening 63 that overlaps the lens LS1. In other words, the lens LS1 is disposed on the first main surface 23 of the first protective layer 21. The opening 63 penetrates the bank layer 61. The bank layer 61 does not overlap the lens LS1 in the third direction Z.

[0090] The bank layer 61 has a peripheral surface 65 that defines the opening 63. The peripheral surface 65 surrounds the lens LS1. The peripheral surface 65 faces the surface S1 of the lens LS1, which is an aspheric surface. In the example shown in FIG. 15 , the peripheral surface 65 is in contact with the surface S1, but the peripheral surface 65 may also be spaced apart from the surface S1.

[0091] The thickness of the bank layer 61 is, for example, half or less of the thickness of the lens LS1. When the thickness of the lens LS1 is, for example, 3 μm, the thickness of the bank layer 61 is, for example, 1 μm.

[0092] The bank layer 61 is formed, for example, from a material having a refractive index equivalent to that of the lens LS1. The bank layer 61 is formed, for example, from silicon nitride. The second protective layer 41 covers the lens LS1 and the bank layer 61. The optical film 51 is disposed on the second protective layer 41.

[0093] Here, examples of the pattern of the bank layer 61 will be described with reference to Fig. 16 and Fig. 17. Fig. 16 and Fig. 17 are diagrams for explaining the pattern of the bank layer 61. In the examples shown in Fig. 16 and Fig. 17, a plurality of lenses LS1 are arranged in the first direction X and the second direction Y, but the bank layer 61 can also be applied to the lens LS2.

[0094] 16, the bank layer 61 is formed by a plurality of rings 61R. The shape of the rings 61R in a plan view is larger than the shape of the lens LS1 in a plan view. The shape of the rings 61R is changed as appropriate depending on the shape of the lens LS1.

[0095] 17, the bank layer 61 covers the first protective layer 21. In this case, the bank layer 61 covers the gaps between the adjacent lenses LS1, and the first protective layer 21 is not exposed from the bank layer 61.

[0096] The configuration of this embodiment can also achieve the same effects as those of Embodiment 1. Furthermore, in this embodiment, the display device DSP includes a bank layer 61. This makes it possible to prevent the lens material LNM from spreading by the opening 63 in the fourth step ST4 of the manufacturing process.

[0097] [Fifth embodiment] 18 is a schematic cross-sectional view showing a display device DSP according to this embodiment. In this embodiment, the lens structure is different from that of the first embodiment. Here, the structure will be described using lens LS1, but this structure can also be applied to lens LS2.

[0098] The lens LS1 is disposed on the first main surface 23 of the first protective layer 21. In this embodiment, the first main surface 23 is a flat surface. The lens LS1 has a first lens portion LS11 located on the first main surface 23, and a second lens portion LS12 located on the first lens portion LS11. The first lens portion LS11 is formed from a different material from the second lens portion LS12.

[0099] As shown in Fig. 18, the first lens portion LS11 has a rectangular shape, and the second lens portion LS12 has a convex shape. The first lens portion LS11 is made of a material that is less susceptible to reflow than the second lens portion LS12. The first lens portion LS11 is made of, for example, an acrylic resin. The first lens portion LS11 has the same refractive index as the second lens portion LS12.

[0100] The second protective layer 41 covers the side surface S2 of the first lens portion LS11 and the surface S3 of the second lens portion LS12. The optical film 51 is disposed on the second protective layer 41.

[0101] The configuration of this embodiment can also achieve the same effects as in Embodiment 1. Furthermore, in this embodiment, lens LS1 has a first lens portion LS11 and a second lens portion LS12. This makes it possible to prevent the material forming second lens portion LS12 from spreading beyond the size of first lens portion LS11 during reflow in fourth step ST4 of the manufacturing process.

[0102] In the present embodiment and the fourth embodiment, the display device DSP includes the second protective layer 41 and the optical film 51, but the display device DSP in these embodiments does not necessarily need to include the second protective layer 41 and the optical film 51.

[0103] All display devices that can be implemented by a person skilled in the art through appropriate design modifications based on the display devices described above as embodiments of the present invention are within the scope of the present invention as long as they incorporate the gist of the present invention. Within the scope of the concept of the present invention, a person skilled in the art can conceive of various modifications, and these modifications are also considered to be within the scope of the present invention. For example, displays in which a person skilled in the art appropriately adds or deletes components or modifies the design, or adds or omits processes or modifies conditions, to the above-described embodiments are also within the scope of the present invention as long as they incorporate the gist of the present invention.

[0104] Furthermore, with regard to other effects brought about by the aspects described in each of the above-mentioned embodiments, those that are clear from the description in this specification or that can be appropriately thought of by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0105] 1...display panel, 21...first protective layer, 23...first main surface, 25...protrusion, 31...underlying layer, 33...second main surface, 41...second protective layer, 51...optical film, 61...bank layer, 63...opening, BM...light-shielding layer, CF1, CF2, CF3...color filters, DSP...display device, LD...light-emitting element, PT...concave-convex pattern.

Claims

1. A plurality of light-emitting elements; a plurality of lenses overlapping the plurality of light-emitting elements; a first protective layer between the plurality of light-emitting elements and the plurality of lenses, the first protective layer having a first main surface on which the plurality of lenses are arranged; the first main surface has an uneven pattern including a plurality of protrusions protruding toward the plurality of lenses; Display device.

2. A portion of the lens is located between adjacent protrusions. The display device according to claim 1 .

3. the concave-convex pattern is formed in a dot shape by the plurality of protrusions in a plan view; The display device according to claim 1 .

4. The uneven pattern is formed in a stripe shape by the plurality of protrusions in a plan view. The display device according to claim 1 .

5. The uneven pattern is formed in a grid shape by the plurality of protrusions in a plan view. The display device according to claim 1 .

6. The uneven pattern is formed by the plurality of annular protrusions in a plan view. The display device according to claim 1 .

7. A plurality of light-emitting elements; a plurality of lenses overlapping the plurality of light-emitting elements; a first protective layer disposed between the plurality of light-emitting elements and the plurality of lenses; a base layer between the first protective layer and the plurality of lenses, the base layer having a second main surface on which the plurality of lenses are arranged, the undercoat layer has at least one of greater oil repellency and greater water repellency than the first protective layer; Display device.

8. the underlayer is formed of a fluorine-based organic compound or silicon oxide; The display device according to claim 7 .

9. the refractive index of the underlayer is equal to the refractive index of the first protective layer; The display device according to claim 7 .

10. The refractive index of the lens is greater than the refractive index of the underlayer. The display device according to claim 9 .

11. A plurality of light-emitting elements; a plurality of lenses overlapping the plurality of light-emitting elements; a first protective layer between the plurality of light-emitting elements and the plurality of lenses, the first protective layer having a first main surface on which the plurality of lenses are arranged; a bank layer disposed on the first principal surface and having a refractive index equivalent to that of the lens; the bank layer has an opening overlapping the lens; Display device.

12. the bank layer is formed by a plurality of rings including the openings. The display device according to claim 11.

13. the bank layer covers the first protective layer. The display device according to claim 11.

14. a second protective layer covering the lenses and having a refractive index lower than that of the lenses; 12. The display device according to claim 1, 7 or 11.

15. further comprising an optical film disposed on the second protective layer. The display device according to claim 14.

16. The plurality of lenses are aspherical lenses.

12. The display device according to claim 1, 7 or 11.

17. The light emitting element further includes a color filter disposed between the light emitting element and the first protective layer and overlapping the plurality of light emitting elements.

12. The display device according to claim 1, 7 or 11.

18. Further comprising a light-shielding layer disposed between adjacent lenses.

12. The display device according to claim 1, 7 or 11.

19. The light-emitting element is an organic EL element or an LED.

12. The display device according to claim 1, 7 or 11.

Images