Display device

Abstract

To provide a display device capable of stably vapor-depositing lenses.SOLUTION: According to one embodiment, a display device including a bank is provided. The bank exposes a first opening of a first sub-pixel and a first opening of a second sub-pixel. A plurality of first lenses are positioned to correspond to the first opening of the first sub-pixel and the first opening of the second sub-pixel. An optical layer is positioned between the bank and the plurality of first lenses. The optical layer includes a first groove. The first groove is positioned between one of the plurality of first lenses corresponding to the first opening of the first sub-pixel and another one of the plurality of first lenses corresponding to the first opening of the second sub-pixel. The first groove has a first thickness. A filler is positioned within the first groove of the optical layer. The filler is arranged in a first direction with two of the plurality of first lenses.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a display device, and more particularly to a display device capable of stably depositing a lens. [Background technology]

[0002] As we enter the information age, the field of display devices that visually display electrical information signals is rapidly developing. Accordingly, various display devices such as liquid crystal display devices (LCDs) and organic light emitting display devices (OLEDs) have been developed and applied to various fields.

[0003] Among them, a light emitting display device includes a light emitting element that is a self-emitting element, and does not require a separate light source used in a non-light emitting element, so that it can be made lighter and thinner. In addition, since the light emitting display device is a self-emitting type, there is no restriction on the viewing angle.

[0004] In this manner, the light emitting display device may include lenses corresponding to the plurality of light emitting units in order to control the viewing angle for reasons such as privacy protection, information protection, and application as a display device for a vehicle.

[0005] The lens for controlling the viewing angle may include a first lens having a narrow viewing angle in one of the vertical or horizontal directions and a wide viewing angle in the other direction, and a second lens having narrow viewing angles in both the vertical and horizontal directions.

[0006] Among these, the first lens having a wide viewing angle in either the up-down direction or the left-right direction may be formed long in the direction having the wide viewing angle. A plurality of such first lenses may be formed on one plane, and the sides of adjacent first lenses may contact each other during a reflow process. Here, the first lenses provided in the first direction may be continuously arranged to be of a linear type.

[0007] Since the linear first lenses do not have a sufficient step between the first lenses, they can act as a structure that prevents the flow of the organic insulating material when a planar layer of the organic insulating material is formed on the first lenses. Also, the first lenses provided continuously in the first direction on the same surface may require a larger fixing force than independent lenses. However, the flow of the planar layer may be prevented by the structure formed by the first lenses, resulting in an area where the planar layer cannot be formed sufficiently, and therefore, there may be a problem that the linear first lenses continuous in the first direction are easily lost in the area where the planar layer is not applied sufficiently. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention can solve the above-mentioned problems, and relates to a display device that can prevent the side surfaces of first lenses arranged in a first direction and having a wide viewing angle from contacting each other, and can form a flat surface of a flat film formed on the first lenses by generating a step between the first lenses.

[0009] The present invention also relates to a display device in which a planarization film formed on a first lens is uniformly formed overall to have a flat surface, thereby preventing linear leakage of the first lens. The present invention also relates to a display device in which lenses including a first lens and a second lens are arranged to correspond to each of a plurality of openings, and a planarization film formed on the first lens is uniformly formed by separating the side surfaces of the first lens without increasing non-openings between the plurality of openings. [Means for solving the problem]

[0010] In the display device of the present invention, a groove is formed in a part of the optical layer located below the first lenses so as to correspond to an area between the first lenses arranged in the first direction, thereby generating a step between the first lenses. Therefore, in the display device of the present invention, the side surfaces of the first lenses are spaced apart from each other, thereby allowing a flat film to be formed uniformly on the first lenses.

[0011] A display device according to an embodiment of the present invention includes a bank exposing first openings included in each of a first sub-pixel and a second sub-pixel, a first lens provided on the bank and corresponding to the first openings of the first sub-pixel and the second sub-pixel, an optical layer provided between the bank and the first lens and including a groove of a first thickness located between the first lens corresponding to the first opening of the first sub-pixel and the first lens corresponding to the first opening of the second sub-pixel, and a filler provided in the groove of the optical layer, wherein the first lens corresponding to the first opening of the first sub-pixel, the first lens corresponding to the first opening of the second sub-pixel, and the filler are arranged side by side in a first direction. Effect of the Invention

[0012] The display device of the present invention has the following effects.

[0013] First, the display device of the present invention has an effect of forming a groove in the optical layer located below the first lens and corresponding to the area between the first lenses arranged in the first direction, thereby enabling the side surfaces of adjacent first lenses to be spaced apart without increasing the non-aperture space.

[0014] Secondly, the display device of the present invention has an effect that the surface of the flattening film provided on the first lenses can be made flat overall by generating steps between the first lenses.

[0015] Thirdly, in the display device of the present invention, the planar film can be formed to be flat overall, and between the first lenses in the first direction, the filled lenses and the first lenses arranged in a different layer from the first lenses are connected to each other, thereby preventing linear leakage of the first lenses arranged in the first direction on the same plane as in the conventional art, and has the effect of preventing unevenness caused by such linear leakage.

[0016] Fourth, the display device of the present invention has the advantage that it is possible to form the lenses into the intended design shape by providing not only the first lens arranged in the first direction, but also a groove in the optical layer corresponding to a gap between lenses where the sides of adjacent lenses may come into contact during the reflow process.

[0017] Fifth, the display device of the present invention has an effect of reducing production energy since the side surfaces of the first lenses can be separated and a flat film can be formed uniformly by simply forming grooves in the optical layer. Therefore, the display device of the present invention is environmentally friendly and has an effect on ESG (Environment / Social / Governance) with the advantage of process optimization. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a plan view of a display device according to a first embodiment of the present invention. [Figure 2a] FIG. 2 is an enlarged view of FIG. [Figure 2b] FIG. 2 is an enlarged view of FIG. [Figure 2c] FIG. 2 is an enlarged view of FIG. [Diagram 3] 2 is a cross-sectional view taken along lines II' and II-II' in FIG. 1. [Figure 4] 2 is a cross-sectional view taken along line III-III' in FIG. [Diagram 5] 4 is a cross-sectional view taken along line IV-IV' in FIG. [Figure 6] 5 is a cross-sectional view of another embodiment of the groove of FIG. 4. FIG. [Figure 7] 5 is a cross-sectional view of yet another embodiment of the groove of FIG. 4. FIG. [Figure 8] 5 is a cross-sectional view of another embodiment of the sensor electrode of FIG. 4. [Figure 9] FIG. 11 is a plan view of a display device according to a second embodiment of the present invention. [Figure 10] 10 is a cross-sectional view taken along line VV' in FIG. 9. [Figure 11a] 5 is a cross-sectional view of the process of FIG. 4. [Figure 11b] 5 is a cross-sectional view of the process of FIG. 4. [Figure 11c] 5 is a cross-sectional view of the process of FIG. 4. [Figure 11d] 5 is a cross-sectional view of the process of FIG. 4. [Figure 11e] 5 is a cross-sectional view of the process of FIG. 4. [Figure 11f] 5 is a cross-sectional view of the process of FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The advantages and features of the present specification and methods for achieving them will become apparent from various examples described below in detail with reference to the accompanying drawings. However, the present specification is not limited to the various examples disclosed below, and may be embodied in various different forms, and the various examples are provided merely to complete the disclosure of the present specification and to fully inform those skilled in the art to which the technical idea of ​​the present specification belongs of the scope of the technical idea of ​​the present specification, and the examples of the present specification are only defined by the scope of the claims.

[0020] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for illustrating various examples of the present specification are illustrative and are not limited to the matters shown in the drawings of the present specification. The same reference numerals refer to the same components throughout the specification. In addition, in the description of the present specification, if it is determined that a detailed description of related publicly known technology may unnecessarily obscure the gist of the specification, the detailed description will be omitted.

[0021] When used in this specification, "including," "having," "consisting of," and the like, other parts can be added unless "only" is used. When an element is expressed in the singular, it includes the plural unless otherwise expressly stated.

[0022] When interpreting elements, they are to be interpreted as including a margin of error even if there is no other explicit description.

[0023] When describing a positional relationship between two parts, for example by using "on", "at the top of", "below", "next to", etc., one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0024] When describing a temporal relationship, for example, using "after", "following", "next to", "before", etc., it is possible to include cases where things are not consecutive, as long as "immediately" or "directly" is not used.

[0025] Although the terms "first", "second", etc. are used to describe various components, these components are not limited to these terms. These terms are used only to distinguish one component from another. Therefore, the first component referred to below may also be the second component within the technical concept of this specification.

[0026] The "first horizontal axis direction," "second horizontal axis direction," and "vertical axis direction" should not be interpreted only as a vertical geometric relationship between them, but may mean having a broader directionality within the range in which the configuration of this specification can functionally operate.

[0027] The term "at least one" should be understood to include all combinations that can be presented from one or more of the relevant items. For example, "at least one of the first item, the second item, and the third item" can mean not only the first item, the second item, or the third item, respectively, but also all combinations of items that can be presented from two or more of the first item, the second item, and the third item.

[0028] The features of the various embodiments of this specification may be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms may be possible, and each example may be implemented independently of each other or may be implemented together in a linked relationship.

[0029] In assigning reference numerals to components in each drawing, the same reference numerals may be used as much as possible for the same components even if they are shown in different drawings, and the scale of the components shown in the accompanying drawings may be different from the actual scale for convenience of explanation, and therefore the scale of the components shown in the accompanying drawings is not limited to the scale shown in the drawings.

[0030] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred examples of a display device according to embodiments of the present specification will be described in detail with reference to the accompanying drawings.

[0031] Fig. 1 is a plan view of a display device of the present invention, and Figs. 2a to 2c are enlarged views showing various features of the same configuration as Fig. 1.

[0032] A display device according to an embodiment of the present invention may include a bank 160 (FIG. 3) having a first opening OA1 included in each of the first subpixel SP1 and the second subpixel SP2, a first lens L1 provided on the bank 160 and corresponding to each of the first openings OA1 of the first subpixel SP1 and the second subpixel SP2, an optical layer 220 (FIG. 4) provided between the bank 160 and the first lens L1 and including a groove H having a first thickness t1 between the first lens L1 corresponding to the first opening OA1 of the first subpixel SP1 and the first lens L1 corresponding to the first opening OA1 of the second subpixel SP2, and a filler L3 provided in the groove H of the optical layer 220. The first lens L1 corresponding to the first opening OA1 of the first subpixel SP1, the first lens L1 corresponding to the first opening OA1 of the second subpixel SP2, and the filler L3 may be arranged side by side in a first direction D1.

[0033] 1, the display device of the present invention may include a plurality of unit pixels including a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3. Each of the first to third sub-pixels SP1, SP2, and SP3 may be a sub-pixel that emits light of a different color from each other. For example, each of the first to third sub-pixels SP1, SP2, and SP3 may be a sub-pixel that emits light of one of red, green, and blue.

[0034] The first to third subpixels SP1, SP2, and SP3 may have different area ratios. As a result, the first lower electrodes 171a and second lower electrodes 171b of the first to third subpixels SP1, SP2, and SP3 and the light-emitting portions and openings OA1 and OA2 of the first to third subpixels SP1, SP2, and SP3 may have different area ratios from the other subpixels. The areas of the first to third subpixels SP1, SP2, and SP3 may be determined in consideration of the life and light-emitting efficiency of the light-emitting element of the hue corresponding to each subpixel. That is, the subpixel that emits light of a short wavelength may have a larger area than the other subpixels, and the subpixel that emits light of a long wavelength may have a smaller area than the other subpixels. Thus, in the present invention, the sizes and area ratios of the subpixels that emit light of different hues are made different from each other, so that the life and light-emitting efficiency of the corresponding light-emitting elements can be made uniform. 1, the second sub-pixel SP2 may have a larger area than the first and third sub-pixels SP1 and SP3, and the third sub-pixel SP3 may have a smaller area than the first and second sub-pixels SP1 and SP2. However, the present invention is not limited thereto, and the arrangement of the first to third sub-pixels SP1, SP2, and SP3 and their respective area ratios may be different.

[0035] The first sub-pixels SP1 and the second sub-pixels SP2 may be alternately arranged in the second direction D2. The third sub-pixel SP3 may be arranged adjacent to the first sub-pixels SP1 and the second sub-pixels SP2 in the first direction D1 intersecting the second direction D2. Here, the first direction D1 and the second direction D2 may be directions that intersect perpendicularly with each other. However, the arrangement structure of the first to third sub-pixels SP1, SP2, and SP3 of the present invention is not limited thereto.

[0036] 2a to 2c, each of the first to third sub-pixels SP1, SP2, and SP3 may include a first bottom electrode 171a and a second bottom electrode 171b. The first bottom electrode 171a and the second bottom electrode 171b may be independently configured and independently driven by different driving circuits.

[0037] The first bottom electrode 171a and the second bottom electrode 171b may have different areas. In addition, the first bottom electrodes 171a of the first to third sub-pixels SP1, SP2, and SP3 may have different area ratios. Therefore, the second bottom electrodes 171b of the first to third sub-pixels SP1, SP2, and SP3 may also have different area ratios.

[0038] The first lower electrode 171a may have a length in the first direction D1 longer than the length in the second direction D2. The first lower electrode 171a may include one first opening OA1. The second lower electrode 171b may also have a length in the first direction D1 longer than the length in the second direction D2. And, the second lower electrode 171b may include a plurality of second openings OA2.

[0039] The first opening OA1 and the second openings OA2 may be regions from which emitted light is emitted. For example, the first opening OA1 and the second openings OA2 may be regions exposed from the bank 160 provided between the light emitting elements 170a and 170b (FIG. 3). In addition, the first opening OA1 and the second openings OA2 may have a different size from an opening generated by the black matrix 210 on the sealing film 180 (FIG. 3) covering the bank 160 and the light emitting elements 170a and 170b, or an opening generated by the sensor electrode 230 (FIG. 3) overlapping the black matrix 210 (see FIG. 4). That is, the first opening OA1 and the second openings OA2 exposed by the bank 160 may have a smaller size than the openings by the black matrix 210 and the sensor electrode 230. The first opening OA1 and the second openings OA2 may have different areas from each other.

[0040] The first opening OA1 may be provided in the first direction D1 of the first bottom electrode 171a. The length of the first opening OA1 in the first direction D1 may be longer than the length of the first opening OA1 in the second direction D2.

[0041] The second openings OA2 may be arranged side by side and spaced apart from each other in the first direction D1 in the second lower electrode 171b. The sum of the lengths of the second openings OA2 in the first direction D1 may be smaller than the length of the second lower electrode 171b in the first direction D1. The length of the second openings OA2 in the first direction D1 may be shorter than the length of the first opening OA1 in the first direction D1. Each of the second openings OA2 may have a length in the first direction D1 that is approximately the same as a length in the second direction D2.

[0042] The optical system may include a first lens L1 and a plurality of second lenses L2 corresponding to the first opening OA1 and the plurality of second openings OA2, respectively. The first lens L1 and the plurality of second lenses L2 may have different shapes and sizes. The first lens L1 and the second lenses L2 may have different area ratios on a plane.

[0043] A lens L1 corresponding to the first opening OA1 may be provided. In correspondence with the first opening OA1, the first lens L1 may have a length in the first direction D1 longer than the second direction D2. The first lens L1 may be large enough to cover the entire first opening OA1 of the first lower electrode 171a. Also, the first lens L1 may have an area larger than the first opening OA1, exceed at least the length of the first lower electrode 171a in the first direction D1, and be provided on the first lower electrode 171a. With reference to FIG. 4, the first lens L1 may be a semi-cylindrical lens having a length in the first direction D1. More specifically, the first lens L1 may be an elliptical lens cut in the major axis direction.

[0044] The semi-cylindrical first lens L1 may have a rectangular cross section in a plane and a semicircular cross section when cut along a cutting line in the second direction D2. The semi-elliptical first lens L1 may have an elliptical cross section in a plane. Such a first lens L1 does not limit the viewing angle in the first direction D1, but can limit the viewing angle in the second direction D2.

[0045] A second lens L2 may be provided corresponding to each of the plurality of second openings OA2. Each of the second lenses L2 may be large enough to completely cover a corresponding one of the plurality of second openings OA2. Also, the length of each of the second lenses L2 in the first direction D1 may be shorter than the length of the first lens L1 in the first direction D1. The plurality of second lenses L2 may be formed of hemispherical or dome-shaped lenses.

[0046] The hemispherical second lens L2 may have a circular cross section on a plane and a semicircular cross section on a cross section cut along each of the cut lines in the first direction D1 and the second direction D2. Such a hemispherical second lens L2 may limit the viewing angles in the first direction D1 and the second direction D2. For example, the first lens L1 may be for providing a wide viewing angle (e.g., a public viewing mode), and the second lens L2 may be for providing a narrow viewing angle (e.g., a privacy viewing mode).

[0047] The display device of the present invention may be a display device that includes a semi-elliptical first lens L1 corresponding to the first lower electrode 171a and a plurality of hemispherical second lenses L2 corresponding to the second lower electrode 171b to restrict / adjust the viewing angle. Since the viewing angle restricting directions of the first lens L1 and the second lens L2 are different, the display device of the present invention may selectively realize a wide viewing angle and a narrow viewing angle. In addition, the display device of the present invention may provide a wide viewing angle mode (e.g., a public viewing mode) by activating a sub-pixel corresponding to the first lens L1, or a narrow viewing angle mode (e.g., a private viewing mode) by activating a sub-pixel corresponding to the second lens L2. In addition, a third mode (e.g., a mode in which brightness is improved due to peaceful weather) in which the sub-pixels corresponding to the first lens L1 and the sub-pixels corresponding to the second lens L2 are both activated may be provided.

[0048] Referring to Fig. 2c, the display device according to the first embodiment of the present invention may include a fill lens L3 between adjacent lenses L1 or L2. The display device according to the first embodiment of the present invention may include a fill lens L3 between adjacent first lenses L1. That is, the fill lens L3 may be provided between the first lenses L1 of adjacent subpixels. For example, as shown in Fig. 2b, the fill lens L3 may be disposed between the first lens L1 of the second subpixel SP2 and the first lens L1 of the third subpixel SP3. The fill lens L3 may be referred to as a filler.

[0049] The filling lens L3 according to the first embodiment may be provided between every first lens L1, but in some cases may not be provided between some of the first lenses L1. When the filling lens L3 is provided between every first lens L1, the first lenses L1 and the filling lens L3 may be arranged alternately in the first direction D1.

[0050] Each of the first lens L1 and the filled lens L3 may have an overlapping portion OL where the adjacent edges partially overlap. Or, the edge of the first lens L1 may have a connecting portion connected to the filled lens L3. Here, the connecting portion between the first lens L1 and the filled lens L3 may overlap the overlapping portion OL between the first lens L1 and the filled lens L3. The first lens L1 and the filled lens L3 may be arranged in different layers, but may be continuous with each other through the connecting portion. Thus, the first lens L1 and the filled lens L3 may be formed as a linear lens LL that is continuous in the first direction D1 on a plane. For example, a material for realizing the linear lens LL may be arranged in the form of a continuous long piece, and a groove in the optical layer may be used to separate and define a plurality of first lenses L1 (for example, the lens material may flow into the groove to define a step between adjacent first lenses L1). In addition, since a part of the lens material is located in the groove between adjacent subpixels, the adhesive force for fixing the first lens L1 is increased, and peeling of the first lens L1 can be prevented or minimized.

[0051] 3 is a cross-sectional view taken along lines II' and II-II' in FIG. 1, showing the light emitting element array 100 and the light emitting elements 170a and 170b. That is, FIG. 3 is a cross-sectional view showing a driving array and a light emitting element corresponding to the first opening and the second opening of any one of the sub-pixels. As an example, FIG. 3 shows cross-sectional views of the first opening OA1 and the second opening OA2 of the first sub-pixel SP1.

[0052] 3, the display device of the present invention may include a thin film transistor Ta and a light emitting element 170a corresponding to the first opening OA1, and a thin film transistor Tb and a light emitting element 170b corresponding to the second opening OA2 on a substrate 110. In addition, the display device of the present invention may include a bank 160 between the light emitting elements 170a, 170b, and a sealing film 180 covering the light emitting elements 170a, 170b.

[0053] The substrate 110 is divided into a display area for displaying a screen and an outer area for not displaying a screen, and the display area may be composed of a plurality of sub-pixels. The plurality of sub-pixels may be composed of a light-emitting portion that actually emits light and a non-light-emitting portion around the light-emitting portion that does not emit light. The light-emitting portion may be referred to as a first opening OA1 and a second opening OA2 in FIG. 3. That is, the first opening OA1 and the second opening OA2 of the present invention are regions exposed from the bank 160, and may be regions in which the intermediate layers 173a and 173b between the first and second lower electrodes 171a and 171b and the upper electrodes 175a and 175b emit light. For example, in the case of a plastic substrate, the substrate 110 may include polyimide or polyamide.

[0054] Various signal lines such as data signals and gate signals, transistors such as a driving thin film transistor, a switching thin film transistor and a sensing thin film transistor, and circuit elements including capacitors may be provided for each lower electrode 171a, 171b on the substrate 110. For convenience of explanation, the present invention shows one first thin film transistor Ta and one second thin film transistor Tb driving the first lower electrode 171a and the second lower electrode 171b, respectively.

[0055] The first thin film transistor Ta includes an active layer 37a, a gate electrode 43a overlapping the channel region 35a of the active layer 37a with a gate insulating film 41a interposed therebetween, and may include a source electrode 51a and a drain electrode 53a respectively connected to both sides of the active layer 37a.

[0056] The second thin film transistor Tb includes an active layer 37b and a gate electrode 43b overlapping the channel region 35b of the active layer 37b with a gate insulating film 41b interposed therebetween, and may include a source electrode 51b and a drain electrode 54b respectively connected to both sides of the active layer 37b.

[0057] The active layers 37a, 37b may include source regions 31a, 31b and drain regions 33a, 33b on either side of a channel region 35a, 35b. The source regions 31a, 31b and drain regions 33a, 33b may each be formed of a semiconductor material doped with n-type or p-type impurities. The channel regions 35a, 35b overlapping with the gate electrodes 43a, 43b may each be formed of a semiconductor material not doped with n-type or p-type impurities.

[0058] The gate electrodes 45a, 45b are provided to overlap the channel regions 35a, 35b of the active layers 37a, 37b with the same width as the gate insulating films 41a, 41b. The gate insulating films 41a, 41b overlap the channel regions 25a, 25b of the active layers 27a, 27b with the same pattern as the gate electrodes 43a, 43b. For example, the gate electrodes 43a, 43b may be a single layer or multiple layers made of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu) or an alloy thereof. Meanwhile, the gate insulating films 41a, 41b may be made of an inorganic insulating material, for example, a silicon oxide film (SiOx), a silicon nitride film (SiNx), a silicon oxynitride film (SiOxNy), or multiple layers thereof.

[0059] Meanwhile, the light-shielding layers 21a, 21b on the substrate 110 overlap at least the channel regions 35a, 35b of the active layers 37a, 37b of the transistors Ta, Tb, and are disposed below the active layers 37a, 37b. The light-shielding layers 21a, 21b prevent external light from being transmitted to the thin film transistors Ta, Tb through the substrate 110. For example, the light-shielding layers 21a, 21b may have a structure consisting of a single layer of a metal material such as molybdenum (Mo), titanium (Ti), aluminum-neodymium (AlNd), aluminum (Al), chromium (Cr), or an alloy thereof, or a multi-layer structure using these materials.

[0060] The buffer film 120 on the light-shielding layers 21a and 21b can cover the light-shielding layers 21a and 21b. For example, the buffer film 120 can have a single-layer or multi-layer structure of silicon oxide (SiOx) or silicon nitride (SiNx).

[0061] The interlayer insulating film 130 on the buffer film 120 may include source contact holes and drain contact holes exposing the source regions 31a, 31b and drain regions 33a, 33b of the active layers 37a, 37b, respectively, and may cover the gate insulating films 41a, 41b and the gate electrodes 43a, 43b. For example, the interlayer insulating film 130 may be made of an inorganic insulating material. For example, the interlayer insulating film 130 may be made of a single layer or multiple layers of a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a silicon oxynitride film (SiOxNy).

[0062] The source electrodes 51a, 51b and the drain electrodes 53a, 53b may be provided as the same layer on the interlayer insulating film 130. The source electrodes 51a, 51b and the drain electrodes 53a, 53b are connected to the source regions 31a, 31b and the drain regions 33a, 33b of the active layers 37a, 37b through source contact holes and drain contact holes, respectively. For example, the source electrodes 51a, 51b and the drain electrodes 53a, 53b may have a structure consisting of a single layer of a metal material such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), or an alloy thereof, or a multi-layer structure using the same.

[0063] The passivation layer 140 on the interlayer insulating film 130 can cover the thin film transistors Ta and Tb. Therefore, the thin film transistors Ta and Tb can be protected by the passivation layer 140. For example, the passivation layer 140 is a kind of inorganic insulating film, and can be composed of a single layer or multiple layers of a silicon oxide film (SiOx), a silicon nitride film (SiNx), or a silicon oxynitride film (SiOxNx).

[0064] A first planarization film 150 may be provided on the passivation layer 140. The first planarization film 150 may be formed to a thickness sufficient to planarize the surface steps on the thin film transistors Ta and Tb, and may be formed of an organic insulating film. In some cases, when the first planarization film 150 also serves to protect the thin film transistors Ta and Tb, the passivation layer 140 may be omitted. For example, the first planarization film 150 is a type of organic insulating film, and may be any one of photo acryl, polyimide, benzocyclobutene resin, and acrylate, and may be formed in a plurality of layers in some cases.

[0065] A first light emitting element 170a corresponding to the first opening OA1 and including a first lower electrode 171a, a middle layer 173a, and an upper electrode 175a, and a second light emitting element 170b corresponding to the second opening OA2 and including a second lower electrode 171b, a middle layer 173b, and an upper electrode 175b may be provided on the first planar layer 150. The first light emitting element 170a and the second light emitting element 170b may be independently driven by different signals received from different thin film transistors Ta and Tb. The first light emitting element 170a may be driven by emitting light from the middle layer 173a when an electric field is formed between the first lower electrode 171a and the upper electrode 175a. The first light emitting element 170a may be driven by emitting light from the middle layer 173b when an electric field is formed between the second lower electrode 171b and the upper electrode 175b.

[0066] The first and second lower electrodes 171a and 171b may be provided together in each of the sub-pixels SP1, SP2, and SP3. The first and second lower electrodes 171a and 171b may be formed in a multi-layer structure including a transparent conductive film and an opaque conductive film having high reflection efficiency. The transparent conductive film of the first and second lower electrodes 171a and 171b may be made of a material having a relatively large linear function value, such as indium tin oxide (ITO) or indium zinc oxide (IZO), and the opaque conductive film may be made of a single layer or multiple layers of any one selected from the group consisting of silver (Ag), aluminum (Al), copper (Cu), molybdenum (Mo), titanium (Ti), nickel (Ni), chromium (Cr), or tungsten (W), or an alloy thereof. For example, the first lower electrode 171a and the second lower electrode 171b may be formed in a structure in which a transparent conductive film, an opaque conductive film, and a transparent conductive film are sequentially stacked, or in a structure in which a transparent conductive film and an opaque conductive film are sequentially stacked.

[0067] The bank 160 covering the edges of the first and second bottom electrodes 171a and 171b may be provided on the entire surface of the first planarization film 150 to expose the first and second openings OA1 and OA2. The bank 160 may include a light absorbing material. For example, the bank 160 may include a black dye. Thus, the display device of the present invention may prevent optical interference and light leakage between adjacent sub-pixels.

[0068] The intermediate layers 173a and 173b may be provided on the first and second bottom electrodes 171a and 171b and the bank 160 over the entire region of the substrate 110. The intermediate layers 173a and 173b corresponding to the first opening OA1 and the second opening OA2 may be formed in the same layer and in the same process. The intermediate layers 173a and 173b may refer to a single stacked organic layer including a hole injection layer HIL, a hole transport layer HTL, an emitting layer EML1 or EML2, an electron transport layer ETL, and an electron injection layer EIL. In some cases, the intermediate layers 173a and 173b may have a tandem structure including a plurality of stacks (first stack, second stack) including the first and second emitting layers EML1 and EML2, respectively, and a charge generation layer (CGL) between the stacks. The tandem structure is not limited to the illustrated two-stack structure, but may be a plurality of stacks of three or more stacks. Here, the first and second light emitting layers EML1, EML2 in the multiple stacks are light emitting layers of the same color that emit any one of red, green, and blue light, and may be patterned and provided in each of the multiple sub-pixels SP1, SP2, and SP3.

[0069] The upper electrodes 175a and 175b disposed on the intermediate layers 173a and 173b may be formed on the entire surface of the substrate 110 through a common mask. That is, the upper electrodes 175a and 175b corresponding to the first opening OA1 and the second opening OA2 may be formed in the same layer and in the same process. For example, the upper electrodes 175a and 175b may be made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), or may be made of silver (Ag), aluminum (Al), magnesium (Mg), calcium (Ca), or an alloy thereof having a thickness thin enough to transmit light.

[0070] A sealing layer 180 may be provided on the upper electrodes 175a and 175b to cover the entire display and non-display regions of the substrate 110. The sealing layer 180 prevents oxygen and moisture from penetrating into the light emitting elements 170a and 170b, thereby extending the life of the light emitting display device. For example, the sealing layer 180 may be formed in a form in which one or more pairs of inorganic sealing layers and organic sealing layers are stacked.

[0071] Fig. 4 is a cross-sectional view taken along line III-III' in Fig. 1, showing a lens array for adjacent first lenses on the light-emitting element array 100. Fig. 5 is a cross-sectional view taken along line IV-IV' in Fig. 1, showing a lens array for adjacent second lenses on the light-emitting element array 100.

[0072] 4 and 5, the display device of the present invention may include a black matrix 210, an optical layer 220, a loss prevention lens structure 240, and a second planar film 260 on a sealing film 180 covering the light emitting element array 100. Here, the light emitting element array 100 may include a substrate 110, a buffer film 120, an interlayer insulating film 130, a passivation layer 140, a first planar film 150, light emitting elements 170a, 170b, and a bank 160 exposing the first and second openings OA1, OA2.

[0073] The black matrix 210 on the encapsulation film 180 may overlap with non-openings except for the first and second openings OA1 and OA2. That is, the black matrix 210 may overlap with the bank 160. The black matrix 210 may include a light absorbing material. For example, the black matrix 210 may include a black dye. Such a black matrix 210 may prevent optical interference and light leakage between adjacent sub-pixels.

[0074] An optical layer 220 may be provided on the black matrix 210. The optical layer 220 may include grooves 220a in areas corresponding to non-openings. The optical layer 220 may be provided over the entire area of ​​the sealing film 180 and the black matrix 210 except for the grooves 220a. The grooves 220a of the optical layer 220 according to the first embodiment may correspond to areas between the first lenses 241 adjacent to each other in the first direction D1 (FIG. 1).

[0075] The groove 220a of the optical layer 220 may be an area where a first thickness t1 is removed from the surface of the optical layer 220. For example, the groove 220a may have a trench shape located between adjacent first lenses L1. The groove 220a may expose the black matrix 210. The groove 220a of the optical layer 220 may be a space into which the pattern of the first lenses 241 can be reflowed and flow during the process of forming the first lenses 241 on the optical layer 220. Thus, the reflowed material of the pattern of the first lenses 241 can flow into the groove 220a of the optical layer 220 at a position lower than the surface of the optical layer 220. Thus, the display device of the present invention can separate the sides of adjacent first lenses 241 by providing the groove 220a in the optical layer 220. That is, the lens material is arranged in rows or columns of sub-pixels like a continuous long strip, and a plurality of first lenses L1 can be individually defined by a portion of the lens material located in the groove located between adjacent sub-pixels. Also, since sufficient space can be secured between adjacent first lenses L1, the second planarizing film 260 can pass between adjacent first lenses L1, and the top surface of the second planarizing film 260 can be uniform across the entire display device. Thus, the display device of the present invention can improve image quality, reduce reflections, and better fix the first lenses L1 in place due to the generally flat top surface of the second planarizing film 260 (e.g., the display device of the present invention can prevent a situation in which the first lenses L1 are connected to each other to form a long dam structure that blocks the application of the second planarizing film 260).

[0076] The groove 220a according to the first embodiment may be an inverted tapered trapezoid in which the bottom side is shorter than the top side in the cross section, as shown in FIG. 4. The cross-sectional shape of the groove 220a is not limited thereto, and may be a trapezoidal groove 520a in which the top side is shorter than the bottom side, as shown in FIG. 6(a), an inverted triangular groove 620a with the apex pointing toward the substrate 110, as shown in FIG. 6(b), or a semicircular or semi-elliptical groove 720a with a curved inner side surface with a width that becomes smaller as it approaches the substrate 110, as shown in FIG. 6(c). Correspondingly, the filling lenses 543, 643, and 743 provided in the grooves 520a, 620a, and 720a in each of FIG. 6(a) to FIG. 6(c) may satisfy the shape of the groove of the embodiment. Thus, the shape of the groove 220a of the present invention is not limited to the illustrated drawings, and may be various shapes such as a polygon and a semicircle.

[0077] 6(a) to 6(c) show that the grooves 520a, 620a, 720a are not provided between every first lens 541, 641, 741, but are selectively provided in a part of the region between the first lenses 541, 641, 741. The optical layers 520, 620, 720, sensor electrodes 530, 630, 730, first lenses 541, 641, 741, connecting portions 545, 645, 745, and second planar films 560, 660, 760 according to the embodiment of FIGS. 6(a) to 6(c) may be formed in the same manner as the optical layer 220, sensor electrode 230, first lens 241, connecting portion 245, and second planar film 260 according to the first embodiment.

[0078] The filled lens 243 may be provided in the groove 220a of the optical layer 220, and the first lens 241 may be provided on the optical layer 220. The first lens 241 and the filled lens 243 may be made of the same material. The connection portion 245 may be physically connected to the first lens 241 and the filled lens 243 (i.e., the first lens 241, the connection portion 245, and the filled lens 243 may be recognized as a continuous single structure). The first lens 241 and the filled lens 243 may be formed in the same process. Specifically, the filled lens 243 may be formed during a reflow process of the first lens 241. Due to the characteristics of the reflow process, an edge of the first lens 241 may be connected to the filled lens 243 provided in the groove 220a, and a connection portion 245 may be formed between the first lens 241 and the filled lens 243. The connection portion 245 between the first lens 241 and the filled lens 243 may be provided on the groove 220a as shown in FIG. 4. However, the connection portion 245 of the present invention is not limited thereto, and depending on the extent to which the filling lens 243 occupies the inside of the groove 220a, the connection portion 245 may be provided within the groove 220a and on a surface of the optical layer 220 that is connected to the groove 220a. According to another embodiment, the connection portion 245 may be omitted and the filling lens 243 may be separated from the first lens 241 by a deep groove.

[0079] Each of the first lenses 241 may be provided corresponding to each of the first openings OA1 of the subpixels. Each of the first lenses 241 may be formed to have an area larger than at least the first opening OA1 of the corresponding subpixel. For example, the area of ​​the first lens L1 shown in FIG. 2b may be larger than the area of ​​the first opening OA1 shown in FIG. 2a. Also, the first lenses 241 may be formed to have different sizes for different subpixels corresponding to the sizes of the respective subpixels. For example, as shown in FIG. 4, the length in the first direction D1 of the first lens 241 corresponding to the second subpixel SP2 may be longer than the length in the first direction D1 of the first lens 241 corresponding to the third subpixel SP3.

[0080] In FIG. 4, the first lens 241 may be a lens having a wide viewing angle in a first direction D1 (for example, the first lens 241 may be for providing a wide-angle viewing mode or a public viewing mode). The first lenses 241 are arranged in the first direction D1, and a fill lens 243 may be provided in a groove 220a of an optical layer 220, which is a layer different from the first lens 241, in the first direction D1 where the first lenses 241 are arranged. The first lenses 241 may form a step d with respect to the fill lens 243. Therefore, the first lenses 241 arranged in the first direction D1 may facilitate the flow of the second planarizing film material when the second planarizing film 260 is formed, and the surface of the second planarizing film 260 may be formed to be generally flat as a result of the step d being generated between each of the first lenses 241 due to the fill lens 243. In addition, in the loss prevention lens structure 240 including the first lenses 241 and the filled lenses 243, the display device of the present invention can more firmly fix the lenses on the optical layer 220 by connecting the first lenses 241 on the optical layer 220 with the filled lenses 243 of another layer. That is, the display device of the present invention can prevent the first lenses 241 from being separated. Also, each of the first lenses 241 corresponds to a first opening OA1, and the display device of the present invention can separate the sides of the first lenses 241 without increasing the non-opening between the first openings OA1. That is, since the first lenses 241 are in close contact with each other and individually defined / separated, the display device of the present invention can provide a higher resolution.

[0081] The filled lenses 243 located between the first lenses 241 adjacent to each other in the first direction D1 may be provided corresponding to non-opening portions of the sub-pixels. The filled lenses 243 may overlap the bank 160 and the black matrix 210. The degree to which the filled lenses 243 occupy the grooves 220a may vary depending on the conditions of the reflow process of the first lenses 241. The filled lenses 243 may be provided at least on the bottom surface of the grooves 220a. When the grooves 220a of the optical layer 220 expose the black matrix 210, the filled lenses 243 may be provided on the surface of the black matrix 210 exposed by the grooves 220a. Also, the second thickness t2 of the filled lenses 243 may be thicker than the first thickness t1 of the grooves 220a. In some cases, the second thickness t2 of the filled lenses 243 may be thinner than the first thickness t1 of the grooves 220a. In this case, the connection portion 245 between the filled lenses 243 and the first lenses 241 may be located in the grooves 220a.

[0082] Since the grooves 220a are located between the first lenses 241, the filled lenses 243 are formed in the grooves 220a of the optical layer by the reflow process. Thus, a step d is defined between the first lenses 241 and the filled lenses 243. The step d allows the second planar film 260 to easily pass over the first lenses 241, and the flat surface of the second planar film 260 can cover the first lenses 241. That is, since the first lenses 241 do not function as a dam to block the flow of the second planar film 260, the second planar film 260 can easily move between the multiple first lenses 241.

[0083] Referring to FIG. 7, the first thickness t1 of the groove 420a according to another embodiment may be less than the total thickness of the optical layer 420. That is, in some embodiments, the groove 420a may completely penetrate the optical layer 420, but the embodiment of the present invention is not limited thereto. For example, as shown in FIG. 7, the lower surface of the groove 420a may be located within the optical layer 420. Here, the groove 420a may have a form in which only a part of the thickness is removed from the surface of the optical layer 420, and the black matrix 210 may not be exposed. In this case, the first lens 441 may have a different thickness or size from the first lens 241 according to the first embodiment. The groove 420a according to another embodiment may require a relatively small space to accommodate the material of the first lens 441, and the first thickness t1 of the groove 420a may correspond to the distance from the surface of the optical layer 420 to the middle of the optical layer 420. Also, the filled lens 443 according to another embodiment may include a connection portion 445 connected to an edge of the first lens 441. Meanwhile, the sensor electrode 430 and the second planarization layer 460 according to the embodiment of FIG. 7 may be formed similarly to the sensor electrode 230 and the planarization layer 260 according to the first embodiment.

[0084] 5, the second lenses 250 may be provided corresponding to the second apertures OA2 of the first sub-pixels SP1. The optical layer 220 between the second lenses 250 according to the first embodiment may also be provided in non-apertures.

[0085] The sensor electrode 230 may be provided on the optical layer 220. The sensor electrode 230 may overlap the non-opening portion and may overlap the bank 160 and the black matrix 210. A first lens 241 and a second lens 250 may be provided to cover the edge of the sensor electrode 230. The sensor electrode 230 according to the first embodiment may be provided on the optical layer 220 with the groove 220a in the corresponding non-opening portion and spaced apart from other sensor electrodes with the groove 220a therebetween.

[0086] Referring to FIG. 8, the sensor electrodes 330, 330a according to another embodiment may be provided on the optical layer 320 to overlap the non-opening portion. Here, the sensor electrodes 330a corresponding to the grooves 320a of the optical layer 320 may be provided along the inside of the grooves 320a from the top of the optical layer 320 corresponding to the non-opening portion. For example, the sensor electrodes 330a may extend to completely cross the grooves 320a. Here, when the grooves 320a expose the black matrix 210, the sensor electrodes 330a may contact the black matrix 210 at the grooves 320a. Also, the connection portion 345 between the first lens 341 and the filled lens 343 may be provided on the sensor electrodes 330a and contact the sensor electrodes 330a. Meanwhile, the filled lenses 343 and the second planar film 360 according to the embodiment of FIG. 8 may be formed in the same manner as the filled lenses 243 and the second planar film 260 according to the first embodiment.

[0087] The sensor electrodes 230, 330, and 330a are touch electrodes and may be made of metal. Here, the sensor electrodes 230, 330, and 330a of the touch electrodes may include a number of crossing transmitting electrodes and a number of crossing receiving electrodes, and may sense a touch based on the amount of change in capacitance between the number of transmitting electrodes and the number of crossing receiving electrodes.

[0088] A second planarizing film 260 may be provided on the first lens 241, the second lens 250, and the filled lens 220a. The second planarizing film 260 may be formed of an organic insulating film to planarize surface steps caused by the first lens 241 and the second lens 250 on the optical layer 220. Here, an inkjet printing process may be used as a method for forming the organic insulating film. The inkjet printing process may be performed by discharging the material of the second planarizing film 260 through a nozzle onto the formed optical layer 220 on which the first lens 241 and the second lens 250 are formed. Here, the nozzles may be irregularly arranged above and between the lenses, rather than being regularly arranged between the lenses. In this way, the material of the second planarizing film 260 sprayed from the irregularly arranged nozzles may be dispersed on the substrate as a whole to form a flat surface. Here, if the step between the first lenses arranged in the first direction is not sufficient, the material of the second planarizing film discharged cannot pass over the structure of the first lenses, so the surface of the second planarizing film cannot be formed flat, and a linear leakage phenomenon in which the first lenses arranged in the first direction leak from between the second planarizing film and the optical layer may occur. (For example, the first lenses may not be clearly defined, and may be connected to each other to function as a dam that prevents the flow of the second planarizing film). Therefore, the display device of the present invention forms a groove 220a in the optical layer 220 located between the first lenses 241 arranged in the first direction D1, and the material of the first lenses 241 is flowed into the groove 220a during the reflow process of the first lenses 241, so that a step d can be generated between the first lenses 241 and the filled lenses 243 filled in the groove 220a. Therefore, in the display device of the present invention, a step d is generated in the vertical cross section between the linear first lenses 241 and the filling lenses 243 arranged continuously in the first direction D1, so that the material of the second planar film 260 can easily flow between the first lenses 241, thereby forming a flat surface of the second planar film 260.Furthermore, in the display device of the present invention, the second planarization film 260 can be uniformly distributed and formed to be generally flat, thereby preventing linear leakage of the first lens 241 arranged in the first direction D1 and improving the adhesion between the first lens 241 and the optical layer.

[0089] The second planarization film 260 is a type of organic insulating film, and may be any one of photoacryl, polyimide, benzocyclobutene resin, and acrylate, and may be formed in multiple layers in some cases.

[0090] Fig. 9 is a plan view of a display device according to a second embodiment of the present invention. Fig. 9 representatively shows a plan view of one sub-pixel SP1, but the display device of the present invention is not limited thereto. Fig. 10 is a cross-sectional view taken along line V-V' in Fig. 9. Below, a description of the same configuration as the previous embodiment will be omitted.

[0091] 9, the display device according to the second embodiment of the present invention may include a groove H between the second lenses L2. The display device according to the second embodiment of the present invention may have an overlapping portion OL where an edge of the second lens L2 and an edge of the groove H partially overlap each other. Here, the second lenses L2 are illustrated as being arranged in one direction, but the display device of the present invention is not limited thereto, and the second lenses L2 may be arranged adjacent to each other in a configuration different from that illustrated (e.g., in a zigzag shape). Even when the second lenses L2 are arranged adjacent to each other in a configuration different from that illustrated, the groove H may be provided between the second lenses L2.

[0092] 10, the display device according to the second embodiment of the present invention includes an optical layer 930 having grooves 920a of a first thickness between second lenses 950, and a filler lens or filler material 943 may be provided in the grooves 920a. Here, each edge of the second lenses 950 may be connected to the filler lenses 943, and a connection portion 945 may be provided between the second lenses 950 and the filler lenses 943.

[0093] Each of the second lenses 950 may be provided on the optical layer 930 corresponding to each of the second openings OA2 exposed by the bank. Each of the second lenses 950 may have a circular shape on a plane and a semicircular or dome shape in cross section. Such a second lens 950 may be a lens that realizes a narrow viewing angle by limiting the viewing angles in both the first direction D1 and the second direction D2.

[0094] The second lens 950 is a lens that realizes a narrow viewing angle in all directions, ie, the up-down direction and the left-right direction (second direction and first direction), and may have a shorter length in the first direction D1 than the first lens L1 that realizes a wide viewing angle in the left-right direction (first direction). Therefore, a plurality of second lenses may be provided in one sub-pixel to realize uniform brightness in different viewing angle modes. In this case, the plurality of second lenses 950 may be disposed in a single second lower electrode 171b, and the distance between adjacent second lenses 950 may be relatively shorter than the distance between other lenses. If the distance between the plurality of second lenses 950 is not sufficient, the plurality of second lenses 950 may be formed in a shape different from the design intention. Meanwhile, in the display device of the present invention, the optical layer 920 located between the plurality of second lenses 950 includes a groove 920a, so that the reflowed material of the plurality of second lenses 950 can flow into the groove 920a. Therefore, the display device of the present invention can prevent adjacent sides of the second lenses 950 from contacting each other, and can form each of the second lenses 950 into an intended shape. In the display device of the present invention, each of the second lenses 950 can be circular in plan and semicircular in cross section.

[0095] Also, due to the characteristics of the reflow process, adjacent edges of the second lenses 950 may be connected to the filled lens 943. Thus, a connection portion 945 may be provided between the second lenses 950 and the filled lens 943. Also, since the contact area is increased by the groove, the second lenses 950 may be more firmly attached to the optical layer.

[0096] Meanwhile, the display device according to the first embodiment of the present invention and the display device according to the second embodiment of the present invention can be simultaneously applied in a single display device. That is, the groove provided in the optical layer between the first lenses according to the first embodiment and the groove provided in the optical layer between the second lenses according to the second embodiment can be simultaneously applied in a single display device. Therefore, the display device of the present invention can have an effect of preventing linear leakage of the first lenses linearly provided in the first direction by forming the planarization film uniformly in the entire region, and can have an effect of quickly forming the second lenses as designed.

[0097] Furthermore, in the display device of the present invention, the grooves in the optical layer do not have to be formed only between the first lenses arranged in the first direction or between the second lenses arranged adjacently in one subpixel. Specifically, the display device of the present invention can have the grooves in the optical layer between lenses where the side surfaces of adjacent lenses may come into contact during the reflow process. That is, the display device of the present invention can prevent the side surfaces of adjacent lenses from coming into contact through the grooves in the optical layer, and can form the lenses into the intended shape.

[0098] 11a to 11f are cross-sectional views showing the steps of manufacturing the display device according to the first embodiment of the present invention, that is, FIGS.

[0099] 11a, an encapsulation layer 180 may be formed on the front surface of the light emitting device array 100 on which the light emitting devices and the banks are formed. A black matrix 210 may be formed on the encapsulation layer 180 by patterning using a mask process corresponding to non-opening portions. An optical layer forming material 221 may be applied on the entire surface of the encapsulation layer 180 on which the black matrix 210 is formed.

[0100] 11b, the optical layer 220 can be formed to overlap at least the openings OA1 and OA2 by patterning the optical layer forming material 221 using a mask process. During this process, a groove 220a can be formed by removing the optical layer forming material 221 by a first thickness t1 so as to correspond to the non-opening between the first openings OA1.

[0101] 11c, the optical layer 220 except for the groove 220a and the opening OA1 may be patterned using a mask process to form the sensor electrode 230. In some cases, the sensor electrode 230 may be partially formed in the groove 220a.

[0102] Next, referring to FIG. 11d, a first lens pattern 241a may be formed on the optical layer 220 overlapping the opening OA1 by patterning using a mask process.

[0103] 11e, the first lens patterns 241a flow into the grooves 220a with fluidity through a reflow process, thereby forming the first lenses 241 on the optical layer 220, and filling lenses 243 can be formed in the grooves 220a of the optical layer 220. Here, connecting portions 245 in which each edge of the first lens 241 and the filling lens 243 are connected through the reflow process can be formed.

[0104] 11f, a second planar film 260 can be formed on the entire surface of the loss prevention lens structure 240 including the first lens 241 and the filling lens 243. The second planar film 260 can be easily flowed due to the step d generated between the first lens 241 and the filling lens 243, so that the surface of the second planar film 260 can be formed flat over the entire area.

[0105] Therefore, the display device of the present invention according to one embodiment has the effect of easily forming the second planar film 260 flat over the entire area, and although the first lenses 241 and the filling lenses 243 are continuously and linearly arranged in the first direction D1, it can have the effect of preventing the conventional linear leakage.

[0106] A display device according to an embodiment of the present specification can be described as follows.

[0107] A display device according to one embodiment of the present invention includes a bank exposing first openings included in each of a first subpixel and a second subpixel, a first lens provided on the bank and corresponding to each of the first openings of the first subpixel and the second subpixel, an optical layer provided between the bank and the first lens and including a groove of a first thickness located between the first lens corresponding to the first opening of the first subpixel and the first lens corresponding to the first opening of the second subpixel, and a filler provided in the groove of the optical layer, wherein the first lens corresponding to the first opening of the first subpixel, the first lens corresponding to the first opening of the second subpixel, and the filler are arranged side by side in a first direction.

[0108] According to a display device according to an embodiment of the present disclosure, the filler may be coupled to an edge of the first lens.

[0109] In a display device according to an embodiment of the present disclosure, the grooves may overlap with the banks.

[0110] In a display device according to an embodiment of the present disclosure, the first thickness may be less than a total thickness of the optical layer.

[0111] A display device according to an embodiment of the present disclosure may further include a planarization film covering the first lens and an upper portion of the filling material.

[0112] In a display device according to an embodiment of the present specification, the first lens may have a length in a first direction longer than a length in a second direction intersecting the first direction.

[0113] According to an embodiment of the present specification, a display device may further include a plurality of second openings included in each of the first sub-pixel and the second sub-pixel, and a second lens corresponding to each of the plurality of second openings, and the length of the second lens in the first direction may be shorter than the length of the first lens in the first direction.

[0114] According to a display device according to an embodiment of the present specification, the first lens may include a plurality of first lenses corresponding to the first openings of the first sub-pixel and the second sub-pixel.

[0115] According to an embodiment of the present specification, a display device may further include a sealing film provided between the optical layer and the bank, and a black matrix provided between the sealing film and the optical layer so as to overlap with the bank, and the groove may expose the black matrix.

[0116] In a display device according to an embodiment of the present disclosure, the filler may be in contact with the black matrix.

[0117] In a display device according to an embodiment of the present disclosure, the filler may have a thickness greater than the first thickness.

[0118] A display device according to an embodiment of the present disclosure may further include a sensor electrode on the optical layer overlapping with the bank.

[0119] In a display device according to an embodiment of the present disclosure, the sensor electrodes may be spaced apart from each other by a groove.

[0120] In a display device according to an embodiment of the present specification, the sensor electrodes may be provided along the inner side of the grooves from the upper part of the optical layer overlapping the banks.

[0121] The present specification described above is not limited to the above-mentioned embodiments and the accompanying drawings, and various substitutions, modifications and alterations are possible within the scope of the technical matters of the present specification, which will be apparent to those skilled in the art to which the present specification pertains. Therefore, the scope of the present specification is determined by the claims below, and all modifications or alterations derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present specification. [Explanation of symbols]

[0122] SP1 1st sub-pixel SP2 Second sub-pixel SP3 3rd sub-pixel OA1 First opening OA2 2nd opening 171a 1st lower electrode 171b Second lower electrode 173a, 173b medium level 175a, 175b upper electrode 160 Bank 180 Sealing film 210 Black Matrix 220, 320, 420, 520, 620, 720, 920 optical layer L1, 241, 341, 441, 541, 641, 741, 941 First lens L2, 250, 950 Second lens L3, 243, 343, 443, 543, 643, 743, 943 Filled Lenses H, 220a, 320a, 420a, 520a, 620a, 720a, 920a Groove 230, 330, 430, 530, 630, 730, 930 Sensor electrodes 260, 360, 460, 560, 660, 760, 960 2nd flat film

Claims

1. a bank exposing a first opening included in each of the first sub-pixel and the second sub-pixel; a plurality of first lenses corresponding to the first openings of the first sub-pixels and the second sub-pixels; an optical layer including a first groove having a first thickness, the first groove being disposed between the bank and the first lenses and between one of the first lenses corresponding to the first opening of the first sub-pixel and another of the first lenses corresponding to the first opening of the second sub-pixel; a filler provided in the first groove of the optical layer; A display device, wherein one of the plurality of first lenses corresponding to the first opening of the first subpixel, another of the plurality of first lenses corresponding to the first opening of the second subpixel, and the filling material are arranged in a first direction.

2. The display device of claim 1 , wherein the filler material is coupled to an edge of at least one of the first lenses.

3. The display device according to claim 1 , wherein the first groove overlaps with the bank.

4. The display device according to claim 1 , wherein each of the plurality of first lenses has a length in the first direction that is longer than a length in a second direction that intersects with the first direction.

5. a plurality of second lenses disposed on the first sub-pixels and the second sub-pixels; each of the first sub-pixel and the second sub-pixel includes a plurality of second openings exposed by the bank; The display device according to claim 4 , wherein a length of each of the second lenses in the first direction is shorter than a length of each of the first lenses in the first direction.

6. The display device of claim 5 , wherein the optical layer includes second grooves located between the second lenses of the first sub-pixels.

7. a sealing film disposed between the optical layer and the bank; a black matrix between the sealing film and the optical layer and overlapping the bank; The display device of claim 1 , wherein the first groove exposes the black matrix.

8. The display device of claim 7 , wherein the filler contacts the black matrix.

9. The display device of claim 1 , wherein the filler has a thickness greater than the first thickness.

10. further comprising a plurality of sensor electrodes disposed on the optical layer; the plurality of sensor electrodes overlap with the bank; The display device of claim 1 , wherein the first groove is located between two adjacent sensor electrodes among the plurality of sensor electrodes.

11. The display device of claim 10 , wherein the plurality of sensor electrodes extend across the grooves.

12. a plurality of sub-pixels each including a first bottom electrode and a second bottom electrode; a first lens overlapping the first opening of the first lower electrode and having a length in a first direction longer than a length in a second direction intersecting the first direction; a plurality of second lenses corresponding to the plurality of second openings provided on the second lower electrode, the length in the first direction being shorter than the length in the first direction of the first lenses; a filled lens disposed in a layer different from the first lens and the plurality of second lenses; A display device, wherein the filled lens is disposed between the first lens of one of the plurality of subpixels and the first lens of a subpixel adjacent to the plurality of subpixels in the first direction.

13. an optical layer covering the first lower electrode and the second lower electrode, the first lens and the plurality of second lenses are located on the optical layer; The optical layer includes a groove. The display of claim 12 , wherein the filled lenses are located within the grooves of the optical layer.

14. The display device according to claim 12 , wherein the fill lens is located between the second lenses provided for each of the sub-pixels.

15. The display device of claim 14 , wherein the filling lens is connected to two adjacent second lenses among the plurality of second lenses.

16. a bank including a first opening for a first light emitting element and a second opening for a second light emitting element; an optical layer overlapping the first opening and the second opening; a first lens located on the optical layer and overlapping the first opening; a second lens located on the optical layer and overlapping the second opening; a first groove located in the optical layer between the first lens and the second lens; a filler material located within the first groove of the optical layer.

17. the filler is coupled to the first lens and the second lens; The display device of claim 16 , wherein the filler material, the first lens, and the second lens comprise the same material.

18. The display device of claim 16 , wherein the thickness of the first groove is equal to or smaller than the thickness of the optical layer.

19. a flattening film disposed on the first lens and the second lens and extending between the first lens and the second lens; The display device of claim 16 , wherein the planarizing film has a uniformly flat upper surface.

20. the first lens and the second lens are collinear; The display device of claim 16 , wherein each of the first lens and the second lens has a semi-cylindrical shape.

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