Indication device

Abstract

To provide a display device that can stably deposit lenses. [Solution] According to one embodiment, a display device including a bank is provided. The bank exposes the first aperture of a first subpixel and the first aperture of a second subpixel. A plurality of first lenses are positioned to correspond to the first aperture of the first subpixel and the first aperture of the second subpixel. An optical layer is located between the bank and the plurality of first lenses. The optical layer includes a first groove. The first groove is located between one of the plurality of first lenses corresponding to the first aperture of the first subpixel and another of the plurality of first lenses corresponding to the first aperture of the second subpixel. The first groove has a first thickness. A filler is located within the first groove of the optical layer. The filler is positioned in a first direction with respect to two of the plurality of first lenses.

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 Art

[0002] In the full-fledged information age, the field of display devices that visually display electrical information signals has been rapidly developing. Therefore, various display devices such as liquid crystal display devices (LCDs) and organic light emitting display devices (OLEDs) have been developed and applied in various fields.

[0003] Among these, a light emitting display device includes a light emitting element which is a self-emitting element, and does not require a separate light source used for a non-light emitting element, so that weight reduction and thinning are possible. In addition, since the light emitting display device is self-emitting, there is no limitation on the viewing angle.

[0004] Thus, the light emitting display device can be provided with lenses corresponding to each of a plurality of light emitting portions for controlling the viewing angle for reasons such as privacy protection, information protection, and application as a vehicle display device.

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

[0006] Among these, the first lens having a wide viewing angle in one direction of the vertical direction or the horizontal direction can be formed long in the direction having the wide viewing angle. A plurality of such first lenses can be formed on one plane, and the side surfaces of the first lenses adjacent to each other in the reflow process can come into contact. Here, the first lenses provided in the first direction can be continuously arranged to be linear.

[0007] A linear first lens can act as a structure that hinders the flow of an organic insulating material when forming a flat film of the organic insulating material on the first lens, because sufficient steps cannot be generated between the first lenses. Furthermore, a first lens continuously arranged in the first direction on the same plane may require a greater fixing force than independent lenses. However, the flow of the flat film may be blocked by the structure generated by the first lens, resulting in areas where the flat film cannot be sufficiently formed. This can lead to the problem that the linear first lens, continuous in the first direction, is easily lost in areas where the flat film is not sufficiently coated. [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention can solve the above-mentioned problems and relates to a display device that prevents the sides of first lenses, which are arranged in a first direction and have a wide field of view, from coming into contact with each other, and creates a step between the first lenses, thereby enabling the surface of a flat film formed on the first lenses to be flat.

[0009] Furthermore, the present invention relates to a display device that can prevent linear leakage of the first lens by ensuring that the flat film formed on the first lens is uniformly formed and has a flat surface. The lens, including the first and second lenses, is arranged to correspond to each of a plurality of openings, and the flat film formed on the first lens can be uniformly formed by separating the sides of the first lens without increasing the non-openings between the plurality of openings. [Means for solving the problem]

[0010] The display device of the present invention can create a step between the first lenses by forming a groove in a portion of the optical layer located below the first lens, corresponding to the region between the first lenses arranged in a first direction. Therefore, the display device of the present invention can uniformly form a flat film on the first lenses by separating the sides of the first lenses from each other.

[0011] A display device according to one embodiment of the present invention includes a bank that exposes a first aperture contained in a first subpixel and a second subpixel, a first lens provided on the bank and corresponding to the first aperture of the first subpixel and the second subpixel, an optical layer provided between the bank and the first lens and including a groove of first thickness located between the first lens corresponding to the first aperture of the first subpixel and the first lens corresponding to the first aperture of the second subpixel, and a filler provided in the groove of the optical layer, wherein the first lens corresponding to the first aperture of the first subpixel, the first lens corresponding to the first aperture of the second subpixel, and the filler are arranged in a first direction. [Effects of the Invention]

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

[0013] Firstly, the display device of the present invention has the effect of separating the sides of adjacent first lenses without increasing the non-aperture space, by forming a groove in the optical layer located below the first lens and corresponding to the region between the first lenses arranged in a first direction.

[0014] Secondly, the display device of the present invention has the effect of making the surface of the flat film provided on the first lens flat overall by creating a step between the first lenses.

[0015] Thirdly, the display device of the present invention can form a flat film that is flat overall, and by connecting the filling lens and the first lens, which are arranged in a different layer from the first lens, between the first lens in the first direction, it is possible to prevent linear leakage of the first lens which is arranged on the same plane in the first direction as in the conventional method, and thus has the effect of preventing unevenness caused by such linear leakage.

[0016] Fourth, the display device of the present invention has the effect of forming the lenses into the shape intended by design, by further providing grooves in the optical layer corresponding to the space between adjacent lenses where the sides of adjacent lenses may come into contact during the reflow process, in addition to the first lens arranged in the first direction.

[0017] Fifth, the display device of the present invention has the effect of reducing production energy because, by forming grooves in the optical layer, the sides of each of the multiple first lenses can be separated and a flat film can be uniformly formed. Therefore, the display device of the present invention is environmentally friendly and has ESG (Environment / Social / Governance) benefits due to the advantages of process optimization. [Brief explanation of the drawing]

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

Best Mode for Carrying Out the Invention

[0019] The advantages and features of this specification and the methods for achieving them will become clear by referring to various examples described in detail hereinafter based on the accompanying drawings. However, this specification is not limited to the various examples disclosed below, and can be embodied in various different forms. Merely, the various examples in this specification complete the disclosure of this specification and are provided to fully inform those with ordinary knowledge in the technical field to which the technical idea of this specification belongs of the scope of the technical idea of this specification. The examples in this specification are only defined by the scope of the claims.

[0020] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the various examples of this specification are exemplary, and thus are not limited to the matters shown in the drawings of this specification. The same reference numerals throughout the specification refer to the same components. Also, in the description of this specification, when it is determined that a specific description of related known technologies may unnecessarily obscure the gist of this specification, the detailed description thereof is omitted.

[0021] When using words such as "includes," "possesses," and "becomes" as used herein, other parts may be added unless "only" is used. When expressing a component in the singular, it includes cases where it includes multiple components unless otherwise explicitly stated.

[0022] When interpreting the constituent elements, they shall be interpreted to include a margin of error, even if not explicitly stated otherwise.

[0023] When describing the relative positions of two parts, for example, by using phrases like "on top of," "above," "below," or "next to," one or more other parts can be located between the two parts, unless "immediately" or "directly" is used.

[0024] When describing temporal relationships, for example, when describing temporal sequence using phrases like "after," "following," "next," or "before," it can include cases that are not continuous, unless "immediately" or "directly" is used.

[0025] The terms "first," "second," etc., are used to describe various components, but these components are not limited to these terms. These terms are used simply to distinguish one component from others. Therefore, the first component mentioned below may also be the second component within the technical concepts of this specification.

[0026] The terms "first horizontal axis direction," "second horizontal axis direction," and "vertical axis direction" should not be interpreted solely as vertical geometric relationships between them, but rather may mean that the configuration specified herein has a broader range of directions within which it can function.

[0027] The term "at least one" should be understood to include all possible combinations of one or more related items. For example, "at least one of items 1, 2, and 3" could mean not just each of items 1, 2, or 3 individually, but all possible combinations of items that can be presented from two or more of items 1, 2, and 3.

[0028] The features of the various embodiments described herein can be combined or linked together in part or in whole, enabling a variety of technical interdependencies and drives, and each example can be implemented independently of the others or together in a related manner.

[0029] When assigning reference numerals to the components in each figure, the same reference numeral can be used for the same component, even if it is shown in other drawings, for example. Furthermore, the scale of the components shown in the attached drawings is different from the actual scale for the sake of explanation, and is not limited to the scale shown in the drawings.

[0030] In the following sections, preferred examples of display devices according to the embodiments of this specification will be described in detail with reference to the accompanying drawings.

[0031] Figure 1 is a plan view of the display device of the present invention. Figures 2a to 2c are enlarged views illustrating various features of the same configuration as in Figure 1.

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

[0033] Referring to Figure 1, the display device of the present invention may include a plurality of unit pixels, including a first subpixel SP1, a second subpixel SP2, and a third subpixel SP3. Each of the first to third subpixels SP1, SP2, and SP3 may emit light of a different hue. For example, each of the first to third subpixels SP1 to SP3 may emit light of one of the following colors: red, green, and blue.

[0034] The first to third subpixels SP1, SP2, and SP3 may have different area ratios from each other. As a result, the first lower electrode 171a and the second lower electrode 171b of each of the first to third subpixels SP1, SP2, and SP3, and the light-emitting parts and apertures OA1 and OA2 of each of the first to third subpixels SP1, SP2, and SP3 may have different area ratios from the other subpixels. The area of ​​each of the first to third subpixels SP1, SP2, and SP3 can be determined by considering the lifetime and luminous efficiency of the light-emitting element of the hue corresponding to each subpixel. That is, a subpixel that emits short-wavelength light may have a larger area than the other subpixels, and a subpixel that emits long-wavelength light may have a smaller area than the other subpixels. Therefore, the present invention makes it possible to make the lifetime and luminous efficiency of the corresponding light-emitting elements uniform by making the size and area ratio of each subpixel that emits light of different hues different from each other. For example, as shown in Figure 1, the second subpixel SP2 may have a larger area than the first and third subpixels SP1 and SP3, and the third subpixel SP3 may have a smaller area than the first and second subpixels SP1 and SP2. However, the present invention is not limited thereto, and the arrangement of the first to third subpixels SP1, SP2, and SP3 and their respective area ratios may differ.

[0035] Such first subpixels SP1 and second subpixels SP2 may be arranged alternately in the second direction D2. The third subpixel SP3 may be arranged adjacent to the first subpixels SP1 and second subpixels SP2 in the first direction D1 which intersects the second direction D2. Here, the first direction D1 and the second direction D2 may be directions that intersect perpendicularly to each other. However, the arrangement structure of the first to third subpixels SP1, SP2, SP3 of the present invention is not limited thereto.

[0036] Referring together to Figures 2a and 2c, each of the first to third subpixels SP1, SP2, and SP3 can include a first lower electrode 171a and a second lower electrode 171b. Each of the first lower electrode 171a and the second lower electrode 171b can be configured independently and driven independently by different drive circuits.

[0037] The first lower electrode 171a and the second lower electrode 171b may have different areas. Furthermore, the first lower electrode 171a of the first to third subpixels SP1, SP2, and SP3 may have different area ratios. Consequently, the second lower electrode 171b of the first to third subpixels SP1, SP2, and SP3 may also have different area ratios.

[0038] The length of the first lower electrode 171a may be longer in the first direction D1 than in the second direction D2. The first lower electrode 171a may contain one first opening OA1. The second lower electrode 171b may also be longer in the first direction D1 than in the second direction D2. The second lower electrode 171b may contain multiple second openings OA2.

[0039] The first aperture OA1 and the multiple second apertures OA2 may be regions from which emitted light is released. For example, the first aperture OA1 and the second apertures OA2 may be regions exposed from the bank 160 provided between the light-emitting elements 170a and 170b (Figure 3). Furthermore, the first aperture OA1 and the second apertures OA2 may have different sizes from the apertures generated by the black matrix 210 on the sealing film 180 (Figure 3) covering the bank 160 and the light-emitting elements 170a and 170b, or the apertures generated by the sensor electrodes 230 (Figure 3) superimposed on the black matrix 210 (see Figure 4). That is, the first aperture OA1 and the second apertures OA2 exposed by the bank 160 may have smaller sizes than the apertures generated by the black matrix 210 and the apertures generated by the sensor electrodes 230. Such first apertures OA1 and each of the second apertures OA2 may have different areas from each other.

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

[0041] Multiple second openings OA2 may be arranged side by side within the second lower electrode 171b, spaced apart from each other in a first direction D1. The sum of the lengths of each of the multiple second openings OA2 in the first direction D1 may be less than the length of the second lower electrode 171b in the first direction D1. The length of each of the multiple second openings OA2 in the first direction D1 may be shorter than the length of the first opening OA1 in the first direction D1. In each of these multiple second openings OA2, the length in the first direction D1 may be approximately the same as the length in the second direction D2.

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

[0043] A lens L1 corresponding to the first aperture OA1 may be provided. Corresponding to the first aperture OA1, the first lens L1 may have a length in the first direction D1 that is longer than the second direction D2. The first lens L1 may be large enough to completely cover the first aperture OA1 of the first lower electrode 171a. Alternatively, the first lens L1 may have a larger area than the first aperture OA1 and may extend at least beyond the length in the first direction D1 of the first lower electrode 171a, and may be mounted on the first lower electrode 171a. Referring together with Figure 4, such a first lens L1 may consist of a semi-cylindrical lens having a length in the first direction D1. More specifically, the first lens L1 may consist of an elliptical lens cut along its long axis.

[0044] A semi-cylindrical first lens L1 may have a rectangular cross-section on a plane and a semi-circular cross-section on a cross-section cut along a cutting line in the second direction D2. Alternatively, a semi-elliptical first lens L1 may have an elliptical cross-section on a plane. Such a first lens L1 does not restrict the field of view in the first direction D1, but can restrict the field of view in the second direction D2.

[0045] The system may include a second lens L2 corresponding to each of the multiple second apertures OA2. Each second lens L2 may be large enough to completely cover one of the corresponding second apertures OA2. The length in the first direction D1 of each second lens L2 may be shorter than the length in the first direction D1 of the first lens L1. Such multiple second lenses L2 may consist of hemispherical or dome-shaped lenses.

[0046] The hemispherical second lens L2 has a circular cross-section on a plane and may have a semicircular cross-section on the cross-section cut along the respective cutting lines in the first direction D1 and the second direction D2. Such a hemispherical second lens L2 can limit the field of view in the first direction D1 and the second direction D2. For example, the first lens L1 may be for providing a wide field of view (e.g., public viewing mode), and the second lens L2 may be for providing a narrow field of view (e.g., private viewing mode).

[0047] Such a display device of the present invention may be a display device that limits / adjusts the viewing angle by comprising a semi-elliptical first lens L1 corresponding to a first lower electrode 171a and a plurality of hemispherical second lenses L2 corresponding to a second lower electrode 171b. Since the viewing angle limiting directions of the first lens L1 and the second lens L2 are different, the display device of the present invention can selectively embody a wide viewing angle and a narrow viewing angle. Furthermore, the display device of the present invention can provide a wide viewing angle mode (e.g., public viewing mode) by activating the subpixels corresponding to the first lens L1, or a narrow viewing angle mode (e.g., private viewing mode) by activating the subpixels corresponding to the second lens L2. Furthermore, it can provide a third mode (e.g., a mode in which brightness is improved by mild weather) in which both the subpixels corresponding to the first lens L1 and the subpixels corresponding to the second lens L2 are activated.

[0048] Referring to Figure 2c, the display device of the present invention according to the first embodiment may be provided with a filling lens L3 between adjacent lenses L1 or L2. The display device of the present invention according to the first embodiment may be provided with a filling lens L3 between adjacent first lenses L1. That is, a filling lens L3 may be provided between the first lenses L1 of each adjacent subpixel. For example, as shown in Figure 2b, the filling lens L3 may be placed between the first lens L1 of the second subpixel SP2 and the first lens L1 of the third subpixel SP3. The filling lens L3 can be said to be a filling material.

[0049] The filling lens L3 according to the first embodiment may be provided between each of the first lenses L1, but in some cases it may not be provided between some of the first lenses L1. When the filling lens L3 is provided between each of the first lenses 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 filling lens L3 may have an overlapping portion OL where a portion of the adjacent edge overlaps. Alternatively, the edge of the first lens L1 may have a connecting portion connected to the filling lens L3. Here, the connecting portion between the first lens L1 and the filling lens L3 can overlap with the overlapping portion OL between the first lens L1 and the filling lens L3. The first lens L1 and the filling lens L3 are arranged in different layers but can be continuous with each other via the connecting portion. Thus, the first lens L1 and the filling lens L3 can consist of a linear lens LL continuous in a first direction D1 on a plane. For example, the material for embodying the linear lens LL is arranged in the form of a continuous long piece, and grooves in the optical layer can be used to separate and define multiple first lenses L1 (for example, lens material can flow into the grooves to define steps between adjacent first lenses L1). Furthermore, since a portion of the lens material is located within 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] Figure 3 is a cross-sectional view along lines I-I' and II-II' in Figure 1, and is a cross-sectional view of the light-emitting element array 100 and light-emitting elements 170a and 170b. In other words, Figure 3 is a cross-sectional view showing the drive array and light-emitting elements corresponding to the first and second apertures of any one subpixel. As an example, Figure 3 shows cross-sectional views of the first aperture OA1 and the second aperture OA2 of the first subpixel SP1.

[0052] Referring to Figure 3, the display device of the present invention may be equipped on a substrate 110 with a thin-film transistor Ta corresponding to a first aperture OA1 and a light-emitting element 170a, and with a thin-film transistor Tb corresponding to a second aperture OA2 and a light-emitting element 170b. Furthermore, the display device of the present invention may be equipped with a bank 160 between the light-emitting elements 170a and 170b, and with a sealing film 180 covering the light-emitting elements 170a and 170b.

[0053] The substrate 110 is divided into a display area for displaying the screen and an outer area for not displaying the screen, and the display area can consist of a plurality of subpixels. The plurality of subpixels can consist of a light-emitting part that actually emits light and a non-light-emitting part around the light-emitting part that does not emit light. The light-emitting part can be said to be the first aperture OA1 and the second aperture OA2 in Figure 3. That is, the first aperture OA1 and the second aperture OA2 of the present invention are areas exposed from the bank 160, and the intermediate layers 173a and 173b between the first and second lower electrodes 171a and 171b, respectively and the upper electrodes 175a and 175b can be light-emitting areas. For example, if the substrate 110 is a plastic substrate, it may include polyimide or polyamide.

[0054] On the substrate 110, circuit elements including various signal wiring such as data signals and gate signals, transistors such as drive thin-film transistors, switching thin-film transistors and sensing thin-film transistors, and capacitors may be provided separately for each of the lower electrodes 171a and 171b. For convenience of explanation, the present invention shows a first thin-film transistor Ta and a second thin-film transistor Tb that drive the first lower electrode 171a and the second lower electrode 171b, respectively.

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

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

[0057] The active layers 37a and 37b may have source regions 31a and 31b and drain regions 33a and 33b on either side of channel regions 35a and 35b. Each of the source regions 31a and 31b and the drain regions 33a and 33b may be formed from a semiconductor material into which n-type or p-type impurities have been implanted. The channel regions 35a and 35b superimposed on the gate electrodes 43a and 43b may be formed from a semiconductor material into which n-type or p-type impurities have not been implanted.

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

[0059] On the other hand, the light-shielding layers 21a and 21b on the substrate 110 are superimposed on the channel regions 35a and 35b of at least the active layers 37a and 37b of the transistors Ta and Tb, and are positioned below the active layers 37a and 37b. The light-shielding layers 21a and 21b prevent external light from passing through the substrate 110 and being transmitted to the thin-film transistors Ta and Tb. For example, the light-shielding layers 21a and 21b may consist of a single layer of a metallic material such as molybdenum (Mo), titanium (Ti), aluminum-neodymium (AlNd), aluminum (Al), or chromium (Cr), or alloys thereof, or may have a multilayer 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 may 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 includes source contact holes and drain contact holes that expose the source regions 31a, 31b and drain regions 33a, 33b of the active layers 37a, 37b, respectively, and can cover the gate insulating films 41a, 41b and gate electrodes 43a, 43b. For example, the interlayer insulating film 130 may consist of an inorganic insulating material. For example, the interlayer insulating film 130 may consist of one or more layers of silicon oxide (SiOx), silicon nitride (SiNx), or silicon oxynitride (SiOxNy).

[0062] Source electrodes 51a, 51b and drain electrodes 53a, 53b may be provided as the same layer on the interlayer insulating film 130. Each of the source electrodes 51a, 51b and drain electrodes 53a, 53b is connected to the source regions 31a, 31b and drain regions 33a, 33b of the active layers 37a, 37b through source contact holes and drain contact holes. For example, the source electrodes 51a, 51b and drain electrodes 53a, 53b may consist of a single layer of a metallic material such as molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), or copper (Cu) or alloys thereof, or may have a multilayer structure using these materials.

[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 type of inorganic insulating film and may consist of one or more layers of silicon oxide (SiOx), silicon nitride (SiNx), or silicon oxynitride (SiOxNx).

[0064] A first flat film 150 may be provided on the passivation layer 140. The first flat film 150 is formed to a thickness sufficient to adequately flatten the surface steps on the upper surfaces of the thin-film transistors Ta and Tb, and may be formed of an organic insulating film. In some cases, when the first flat film 150 also serves to protect the thin-film transistors Ta and Tb, the passivation layer 140 may be omitted. For example, the first flat film 150 is a type of organic insulating film, and may be one of the following: photoacrylic, polyimide, benzocyclobutene resin, and acrylate, and may be formed in multiple layers.

[0065] On the first flat film 150, a first light-emitting element 170a corresponding to a first aperture OA1 and including a first lower electrode 171a, an intermediate layer 173a, and an upper electrode 175a may be provided, and a second light-emitting element 170b corresponding to a second aperture OA2 and including a second lower electrode 171b, an intermediate layer 173b, and an upper electrode 175b may be provided. The first light-emitting element 170a and the second light-emitting element 170b can each be driven independently by different signals received from different thin-film transistors Ta and Tb. The first light-emitting element 170a can be driven by the formation of an electric field between the first lower electrode 171a and the upper electrode 175a, causing light to be emitted from the intermediate layer 173a. It can also be driven by the formation of an electric field between the second lower electrode 171b and the upper electrode 175b, causing light to be emitted from the intermediate layer 173b.

[0066] The first lower electrode 171a and the second lower electrode 171b may be provided together on each of the multiple subpixels SP1, SP2, and SP3. The first lower electrode 171a and the second lower electrode 171b may be formed in a multilayer structure including a transparent conductive film and an opaque conductive film with high reflectivity. The transparent conductive film of the first lower electrode 171a and the second lower electrode 171b may be made of a material with a relatively large unifunction value, such as indium tin oxide (ITO) or indium zinc oxide (IZO), and the opaque conductive film may consist of a single layer or multilayer of any one of the following 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 laminated, or in a structure in which a transparent conductive film and an opaque conductive film are sequentially laminated.

[0067] The banks 160 covering the edges of the first lower electrode 171a and the second lower electrode 171b may be provided on the entire surface of the first planarization film 150 so as to expose the first aperture OA1 and the second aperture OA2. The banks 160 may also contain a light-absorbing material. For example, the banks 160 may contain a black dye. Thus, the display device of the present invention can prevent light interference and light leakage between adjacent subpixels.

[0068] Intermediate layers 173a and 173b may be provided over the entire area of ​​the substrate 110 on the first and second lower electrodes 171a and 171b and the bank 160. Intermediate layers 173a and 173b corresponding to the first opening OA1 and the second opening OA2, respectively, can be formed in the same layer using the same process. Such intermediate layers 173a and 173b may also represent organic layers of a single stack consisting of multiple layers including a hole injection layer (HIL), a hole transport layer (HTL), an emissive 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 form a tandem structure including multiple stacks (first stack, second stack) each having a first and second emissive layer (EML1, EML2) and a charge generation layer (CGL) between the stacks. The tandem structure is not limited to the two-stack structure shown, but may consist of three or more stacks. Here, the first and second light-emitting layers EML1 and EML2 in multiple stacks are light-emitting layers of the same color that emit one of the following colors: red, green, and blue, and can be provided in a patterned manner on each of the multiple subpixels SP1, SP2, and SP3.

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

[0070] An encapsulation film 180 may be provided on the upper electrodes 175a and 175b so as to cover the entire surface of the display area and non-display area on the substrate 110. The encapsulation film 180 extends the lifespan of the light-emitting device by preventing oxygen and moisture from penetrating the light-emitting elements 170a and 170b. As an example, the encapsulation film 180 may be formed in a form in which one or more pairs of inorganic and organic encapsulation films are laminated.

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

[0072] Referring to Figures 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 flat film 260 on a sealing film 180 covering a 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 flat film 150, light-emitting elements 170a and 170b, and a bank 160 that exposes the first and second apertures OA1 and OA2.

[0073] The black matrix 210 on the sealing film 180 can be superimposed on the non-apertures, excluding the first and second apertures OA1 and OA2. That is, the black matrix 210 can be superimposed on the bank 160. The black matrix 210 can contain a light-absorbing material. For example, the black matrix 210 can contain a black dye. Such a black matrix 210 can prevent light interference and light leakage between adjacent subpixels.

[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-aperture regions. The optical layer 220 may extend over the entire area of ​​the sealing film 180 and the black matrix 210, except for the grooves 220a. In the first embodiment, the grooves 220a of the optical layer 220 may correspond to the area between first lenses 241 adjacent to each other in a first direction D1 (Figure 1).

[0075] The groove 220a of the optical layer 220 may be a region from which a first thickness t1 has been 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 can expose the black matrix 210. Such a groove 220a of the optical layer 220 can become a space into which the pattern of the first lens 241 can reflow during the formation process of the first lens 241 on the optical layer 220. Thus, the material from which the pattern of the first lens 241 has reflowed can flow into the groove 220a of the optical layer 220, which is located 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 optical layer 220 with groove 220a. That is, the lens material can be arranged in rows or columns of subpixels like a continuous long piece, 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 subpixels. Furthermore, since sufficient space can be secured between adjacent first lenses L1, the second flat film 260 can pass between adjacent first lenses L1, and the upper surface of the second flat film 260 can be uniform throughout the entire display device. Thus, the display device of the present invention has improved image quality, reduced reflection, and the first lenses L1 can be fixed in place more effectively due to the overall flat upper surface of the second flat film 260 (for example, the display device of the present invention can prevent situations in which the first lenses L1 are connected to each other and form a long dam structure that blocks the coating of the second flat film 260).

[0076] The groove 220a in the first embodiment can be a trapezoidal shape with an inverted tapered cross-section, where the lower side is shorter than the upper side, as shown in Figure 4. The cross-sectional shape of the groove 220a is not limited to this, and can be a trapezoidal groove 520a with a positive tapered cross-section, as shown in Figure 6(a), a groove 620a with an inverted triangular shape where the vertex points toward the substrate 110, as shown in Figure 6(b), or a semicircular or semi-elliptical groove 720a, as shown in Figure 6(c), having a curved inner surface while becoming narrower as it approaches the substrate 110. Correspondingly, the filling lenses 543, 643, and 743 provided in the grooves 520a, 620a, and 720a in Figures 6(a) to 6(c) can satisfy the groove shape of the embodiment. Thus, the shape of the groove 220a of the present invention is not limited to the illustrated drawings and can have a variety of shapes such as polygons and semicircles.

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

[0078] A filling lens 243 may be provided in a groove 220a of the optical layer 220, and a first lens 241 may be provided on the optical layer 220. The first lens 241 and the filling lens 243 may be made of the same material. A connecting portion 245 may be physically connected to the first lens 241 and the filling lens 243 (i.e., the first lens 241, the connecting portion 245, and the filling lens 243 may be recognized as a continuous single configuration). The first lens 241 and the filling lens 243 may be formed in the same process. Specifically, the filling lens 243 may be formed during the reflow process of the first lens 241. Due to the characteristics of the reflow process, the edge of the first lens 241 may be connected to the filling lens 243 provided in the groove 220a, and a connecting portion 245 may be formed between the first lens 241 and the filling lens 243. The connecting portion 245 between the first lens 241 and the filling lens 243 may be provided on the groove 220a, as shown in Figure 4. However, the connecting portion 245 of the present invention is not limited to this, and depending on the extent to which the filling lens 243 occupies the interior of the groove 220a, the connecting portion 245 may be provided within the groove 220a or on the surface of the optical layer 220 connected to the groove 220a. According to other embodiments, the connecting portion 245 can be omitted, and the filling lens 243 can 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 apertures OA1 of the subpixel. Each first lens 241 may be formed to have an area larger than at least the first aperture OA1 of the subpixel. For example, the area of ​​the first lens L1 shown in Figure 2b may be larger than the area of ​​the first open portion OA1 shown in Figure 2a. Also, the first lenses 241 may be formed to be different sizes for different subpixels, corresponding to the size of each subpixel. For example, as shown in Figure 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 Figure 4, the first lens 241 may be a lens having a wide field of view in the 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 side by side in the first direction D1, and a filling lens 243 may be provided in a groove 220a of an optical layer 220, which is a different layer from the first lens 241, in the first direction D1 where the first lenses 241 are arranged. The first lens 241 can form a step d with respect to the filling lens 243. Therefore, when the first lenses 241 arranged side by side in the first direction D1 are formed, the step d created by the filling lens 243 between them facilitates the flow of the second flat film material during the formation of the second flat film 260, and the surface of the second flat film 260 can be formed to be flat overall. Furthermore, in the loss prevention lens structure 240 including the first lens 241 and the filling lens 243, the display device of the present invention can more firmly fix the lens on the optical layer 220 by connecting the first lens 241 on the optical layer 220 with the filling lens 243 of the other layer. That is, the display device of the present invention can prevent the first lens 241 from becoming separated. Also, each of the first lenses 241 corresponds to the first aperture OA1, and the display device of the present invention can separate the sides of the first lenses 241 without increasing the non-apertures between the first apertures OA1. That is, since the multiple first lenses 241 are in close contact with each other and are individually defined / separated, the display device of the present invention can provide a higher resolution.

[0081] A filling lens 243 located between the first lenses 241 adjacent to the first direction D1 may be provided corresponding to the non-aperture of a subpixel. Such a filling lens 243 can be superimposed with the bank 160 and the black matrix 210. The extent to which the filling lens 243 occupies the groove 220a may vary depending on the conditions of the reflow process of the first lenses 241. The filling lens 243 may be provided at least on the bottom surface of the groove 220a. If the groove 220a of the optical layer 220 exposes the black matrix 210, the filling lens 243 may be provided on the surface of the black matrix 210 exposed by the groove 220a. Also, the second thickness t2 of the filling lens 243 may be thicker than the first thickness t1 of the groove 220a. In some cases, the second thickness t2 of the filling lens 243 may be thinner than the first thickness t1 of the groove 220a. In this case, the connecting portion 245 between the filling lens 243 and the first lenses 241 may be located within the groove 220a.

[0082] Since the groove 220a is located between the first lenses 241, the reflow process forms a filling lens 243 within the groove 220a of the optical layer. Thus, a step d is defined between the first lens 241 and the filling lens 243. The second flat film 260 can easily pass over the first lens 241 due to the step d, and the flat surface of the second flat film 260 can cover the first lens 241. In other words, since the first lens 241 does not act as a dam blocking the flow of the second flat film 260, the second flat film 260 can easily move between multiple first lenses 241.

[0083] Referring to Figure 7, the first thickness t1 of the groove 420a in other embodiments may be thinner than the total thickness of the optical layer 420. That is, in some embodiments, the groove 420a can completely penetrate the optical layer 420, but embodiments of the present invention are not limited thereto. For example, as shown in Figure 7, the lower surface of the groove 420a can be located within the optical layer 420. Here, the groove 420a is in a form in which only a portion of the thickness is removed from the surface of the optical layer 420, so that the black matrix 210 is not exposed. In this case, the first lens 441 may have a different thickness or size from the first lens 241 in the first embodiment. The groove 420a in other embodiments may require relatively little 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 in other embodiments may include a connecting portion 445 connected to the edge of the first lens 441. On the other hand, the sensor electrode 430 and the second flat film 460 according to the embodiment of Figure 7 can be formed in the same manner as the sensor electrode 230 and the flat film 260 according to the first embodiment.

[0084] On the other hand, referring to Figure 5, the second lens 250 may be provided corresponding to each of the second apertures OA2 of the first subpixel SP1. The optical layer 220 between the second lenses 250 according to the first embodiment may also be provided in non-aperture areas.

[0085] A sensor electrode 230 may be provided on the optical layer 220. The sensor electrode 230 can be superimposed on a non-aperture and on the bank 160 and the black matrix 210. The first lens 241 and the second lens 250 may each be provided so as to cover the edge of the sensor electrode 230. In the first embodiment, the sensor electrode 230 may be provided on the optical layer 220 such that the groove 220a corresponds to a non-aperture and is separated from other sensor electrodes with the groove 220a in between.

[0086] Referring to Figure 8, the sensor electrodes 330 and 330a in other embodiments may be provided on the optical layer 320 so as to overlap with the non-aperture. Here, the sensor electrode 330a corresponding to the groove 320a of the optical layer 320 may be provided from the top of the optical layer 320 corresponding to the non-aperture along the inside of the groove 320a. For example, the sensor electrode 330a may extend so as to completely traverse the groove 320a. Here, if the groove 320a exposes the black matrix 210, the sensor electrode 330a can contact the black matrix 210 at the groove 320a. Also, the connecting portion 345 between the first lens 341 and the filling lens 343 may be provided on the sensor electrode 330a and can contact the sensor electrode 330a. On the other hand, the filling lens 343 and the second flat film 360 in the embodiment of Figure 8 may be formed similarly to the filling lens 243 and the second flat film 260 in the first embodiment.

[0087] Such 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 intersecting transmitting electrodes and a number of receiving electrodes, and a touch can be detected from the amount of change in capacitance between the number of transmitting electrodes and the number of receiving electrodes.

[0088] A second flat film 260 may be provided on the first lens 241, the second lens 250, and the filling lens 220a. The second flat film 260 may be formed of an organic insulating film so as to flatten the surface steps generated by the first lens 241 and the second lens 250 on the optical layer 220. Here, an inkjet printing process can be used as the method for forming the organic insulating film. The inkjet printing process can be carried out by ejecting the material of the second flat 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 are not easily arranged regularly between the lenses, and may be arranged irregularly on the top of the lenses and between the lenses. In this way, the material of the second flat film 260 ejected from irregularly arranged nozzles can be dispersed evenly on the substrate to form a flat surface. If the step difference between the first lenses arranged in the first direction is insufficient, the material of the second flat film that is ejected cannot pass over the structure formed by the first lenses, so the surface of the second flat film cannot be formed flat, and a linear leakage phenomenon may occur in which the first lenses arranged in the first direction leak out from between the second flat film and the optical layer. (For example, if multiple first lenses are not clearly defined, multiple first lenses can be connected to each other and function as a dam that obstructs the flow of the second flat film). Therefore, the display device of the present invention can create a step difference d between the first lens 241 and the filling lens 243 that fills the groove 220a by forming a groove 220a in the optical layer 220 located between the first lenses 241 arranged in the first direction D1, and by allowing the material of the first lens 241 to flow into the groove 220a during the reflow process of the first lens 241. Therefore, the display device of the present invention can form a flat surface for the second flat film 260 by generating a step d in the vertical cross-section between the linear first lens 241 and the filling lens 243, which are arranged continuously in the first direction D1, thereby allowing the material of the second flat film 260 to flow easily between the first lens 241.Furthermore, the display device of the present invention has the effect of preventing linear leakage of the first lens 241 positioned in the first direction D1 and improving the adhesion between the first lens 241 and the optical layer, since the second planarization film 260 is uniformly distributed and the second planarization film 260 can be formed to be flat overall.

[0089] Such a second flat film 260 is a type of organic insulating film, and is one of the following: photoacrylic, polyimide, benzocyclobutene resin, and acrylate, and in some cases can be formed in multiple layers.

[0090] Figure 9 is a plan view of a display device according to a second embodiment of the present invention. Figure 9 shows a typical plan view of any one subpixel SP1, but the display device of the present invention is not limited to this. Figure 10 is a cross-sectional view along the line V-V' in Figure 9. The following description of configurations similar to those in the previous embodiment will be omitted.

[0091] Referring to Figure 9, a display device according to a 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 the edge of the second lens L2 and the edge of the groove H partially overlap each other. Here, the second lenses L2 are shown 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 different arrangement (for example, in a zigzag shape). Even when the second lenses L2 are arranged adjacent to each other in an arrangement structure different from that shown, a groove H may be provided between the second lenses L2.

[0092] Referring to Figure 10, the display device according to the second embodiment of the present invention is provided with an optical layer 930 having a groove 920a of a first thickness between second lenses 950, and a filling lens or filling material 943 may be provided in the groove 920a. Here, each edge of the second lens 950 is connected to the filling lens 943, and a connecting portion 945 may be provided between the second lens 950 and the filling lens 943.

[0093] Each of the second lenses 950 may be provided on the optical layer 930 corresponding to each of the second apertures OA2 exposed by the bank. Each of the second lenses 950 may have a circular shape in plan and a semicircular or dome-shaped cross-section. Such second lenses 950 may be lenses that embody a narrow field of view by limiting the field of view in both the first direction D1 and the second direction D2.

[0094] The second lens 950 is a lens that embodies a narrow field of view in all directions, both vertically and horizontally (second and first directions), and the length of the first direction D1 can be shorter compared to the first lens L1, which embodies a wide field of view in the horizontal direction (first direction). Therefore, multiple second lenses can be provided in order to embody uniform brightness for different field of view modes in a single subpixel. In this case, multiple second lenses 950 are arranged within a single second lower electrode 171b, and the separation distance between adjacent second lenses 950 can be relatively shorter than the separation distance between other lenses. If the separation distance between multiple second lenses 950 is insufficient, the multiple second lenses 950 may be formed in a shape different from the design intent. Incidentally, the display device of the present invention provides grooves 920a in the optical layer 920 located between the multiple second lenses 950, allowing the reflowed material of the multiple second lenses 950 to flow into the grooves 920a. Therefore, the display device of the present invention can prevent adjacent sides of the multiple second lenses 950 from touching, and each of the multiple second lenses 950 can be formed into an intended shape. In the display device of the present invention, each of the multiple second lenses 950 may be circular in plan and semicircular in cross-section.

[0095] Furthermore, due to the characteristics of the reflow process, the edges of the multiple second lenses 950 can be connected to the filling lens 943 at adjacent points. Therefore, a connecting portion 945 can be provided between the second lens 950 and the filling lens 943. In addition, the contact area is increased by the groove, so the second lens 950 can be more firmly attached to the optical layer.

[0096] On the other hand, 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 applied simultaneously within a single display device. That is, the grooves provided in the optical layer between the first lenses according to the first embodiment and the grooves provided in the optical layer between the second lenses according to the second embodiment can be applied simultaneously within a single display device. Therefore, the display device of the present invention can simultaneously have the effect of uniformly forming a flat film over the entire area, preventing linear leakage of the first lens which is linearly arranged in the first direction, and allowing the second lens to be formed immediately as intended in the design.

[0097] Furthermore, the display device of the present invention does not have to form grooves in the optical layer only between first lenses arranged in a first direction or between second lenses arranged adjacently within a single subpixel. Specifically, the display device of the present invention can provide grooves in the optical layer between lenses where the sides of adjacent lenses may come into contact during the reflow process. In other words, the display device of the present invention can prevent the sides of adjacent lenses from coming into contact through the grooves in the optical layer, thereby allowing the lenses to be formed into the shape intended by the design.

[0098] Figures 11a to 11f are cross-sectional process views of the display device according to the first embodiment of the present invention. That is, Figures 11a to 11f are cross-sectional process views of Figure 4.

[0099] Referring to Figure 11a, a sealing layer 180 can be formed on the front surface of the light-emitting element array 100 in which the light-emitting elements and banks are formed. A black matrix 210 can be formed on the sealing layer 180 by patterning in a masking process corresponding to the non-opening areas. An optical layer-forming material 221 can be applied to the entire surface of the sealing layer 180 in which the black matrix 210 is formed.

[0100] Next, referring to Figure 11b, the optical layer 220 can be formed superimposed on at least the openings OA1 and OA2 by patterning the optical layer forming material 221 in a masking process. In this process, grooves 220a can be formed in which the optical layer forming material 221 is removed by a first thickness t1 to correspond to the non-openings between the first openings OA1.

[0101] Next, referring to Figure 11c, the sensor electrode 230 can be formed on the optical layer 220, excluding the groove 220a and the opening OA1, by patterning in a masking process. In some cases, the sensor electrode 230 can also be partially formed within the groove 220a.

[0102] Next, referring to Figure 11d, the first lens pattern 241a can be formed by patterning on the optical layer 220 superimposed on the aperture OA1 using a masking process.

[0103] Next, referring to Figure 11e, the first lens pattern 241a flows into the groove 220a with fluidity through the reflow process, thereby forming the first lens 241 on the optical layer 220 and the filling lens 243 in the groove 220a of the optical layer 220. Here, a connecting portion 245 can be formed by connecting each edge of the first lens 241 and the filling lens 243 through the reflow process.

[0104] Next, referring to Figure 11f, a second flat film 260 can be formed on the entire surface of the loss prevention lens structure 240, which includes the first lens 241 and the filling lens 243. The second flat film 260 flows easily due to the step difference d that occurs between the first lens 241 and the filling lens 243, thereby forming a flat surface over its entire area.

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

[0106] A display device according to one embodiment of this specification can be described as follows.

[0107] A display device according to one embodiment of the present invention includes a bank that exposes a first aperture contained in a first subpixel and a second subpixel, a first lens provided on the bank and corresponding to the first aperture of the first subpixel and the second subpixel, an optical layer provided between the bank and the first lens and including a groove of first thickness located between the first lens corresponding to the first aperture of the first subpixel and the first lens corresponding to the first aperture of the second subpixel, and a filler provided in the groove of the optical layer, wherein the first lens corresponding to the first aperture of the first subpixel, the first lens corresponding to the first aperture of the second subpixel, and the filler are arranged in a first direction.

[0108] According to one embodiment of the display device described herein, the filler material can be connected to the edge of the first lens.

[0109] According to one embodiment of the display device described herein, the groove may overlap with the bank.

[0110] According to one embodiment of the display device described herein, the first thickness may be thinner than the total thickness of the optical layer.

[0111] According to one embodiment of this specification, the display device may further include a flat film covering the first lens and the upper part of the filler material.

[0112] According to one embodiment of the display device described herein, the length of the first lens may be longer in the first direction than in the length of the second direction intersecting the first direction.

[0113] According to one embodiment of this specification, the display device further includes a plurality of second apertures contained in each of the first subpixel and the second subpixel, and a second lens corresponding to each of the plurality of second apertures, wherein 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 one embodiment of the display device described herein, the first lens may include a plurality of first lenses corresponding to the first apertures of the first subpixel and the second subpixel, respectively.

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

[0116] According to one embodiment of the display device described herein, the filler can come into contact with the black matrix.

[0117] According to one embodiment of the display device described herein, the filler may have a thickness greater than the first thickness.

[0118] According to one embodiment of the display device described herein, the optical layer may further include sensor electrodes superimposed on the bank.

[0119] According to one embodiment of the display device described herein, sensor electrodes can be separated from other sensor electrodes by a groove in between.

[0120] According to one embodiment of the display device described herein, the sensor electrode may be provided along the inside of the groove from the top of the optical layer superimposed on the bank.

[0121] This specification, as described above, is not limited to the embodiments and accompanying drawings, and it will be apparent to those ordinary skill in the art to which this specification belongs that various substitutions, modifications, and alterations are possible without departing from the technical matters of this specification. Accordingly, the scope of this specification is determined by the claims set forth below, and all forms of modification or alteration derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included within the scope of this specification. [Explanation of Symbols]

[0122] SP1 First subpixel SP2 2nd subpixel SP3 3rd subpixel OA1 First opening OA2 2nd opening 171a 1st lower electrode 171b Second lower electrode 173a, 173b medium level 175a, 175b Upper electrodes 160 Bank 180 Encapsulation 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 that exposes the first aperture contained in the first subpixel and the second subpixel, A plurality of first lenses corresponding to the first aperture of the first subpixel and the second subpixel, An optical layer provided between the bank and the plurality of first lenses, including a first groove of first thickness located between one of the plurality of first lenses corresponding to the first aperture of the first subpixel and another of the plurality of first lenses corresponding to the first aperture of the second subpixel, The optical layer includes a filler material provided in the first groove, The first groove of the optical layer has a recessed shape in the upper portion of the optical layer that is positioned in close proximity to the plurality of first lenses. A portion of the optical layer superimposed on the first subpixel contains the same material as a portion of the optical layer superimposed on the second subpixel. One of the plurality of first lenses corresponding to the first aperture of the first subpixel, another of the plurality of first lenses corresponding to the first aperture of the second subpixel, and the filler material are arranged in a first direction. Each of the plurality of first lenses has a convex surface in the direction opposite to the optical layer, A display device in which at least a portion of the first groove is located outside the convex surface of each of the plurality of first lenses.

2. The display device according to claim 1, wherein the filler is connected to the edge of at least one of the plurality of 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 the length in the second direction that intersects the first direction.

5. The system further includes a plurality of second lenses located on the first subpixel and the second subpixel, Each of the first subpixel and the second subpixel includes a plurality of second apertures exposed by the bank, The display device according to claim 4, wherein the length of each of the plurality of second lenses in the first direction is shorter than the length of each of the plurality of first lenses in the first direction.

6. The display device according to claim 5, wherein the optical layer includes a second groove located between the plurality of second lenses of the first subpixel.

7. A sealing film disposed between the optical layer and the bank, The method further includes a black matrix superimposed on the bank between the sealing film and the optical layer, The display device according to claim 1, wherein the first groove exposes the black matrix.

8. The display device according to claim 7, wherein the filler material is in contact with the black matrix.

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

10. The optical layer further includes a plurality of sensor electrodes located on the optical layer, The plurality of sensor electrodes are superimposed on the bank, The display device according to claim 1, wherein the first groove is located between two adjacent sensor electrodes among the plurality of sensor electrodes.

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

12. Multiple subpixels, each including a first lower electrode and a second lower electrode, An optical layer covering the first lower electrode and the second lower electrode, A first lens superimposed on the first aperture of the first lower electrode on the optical layer, the length in the first direction being longer than the length in the second direction intersecting the first direction, A plurality of second lenses, each corresponding to a plurality of second apertures provided on the second lower electrode on the optical layer, and having a length in the first direction shorter than the length of the first lens in the first direction, The first lens and the plurality of second lenses are arranged in different layers from the filling lens, A portion of the optical layer superimposed on the plurality of first lenses contains the same material as a portion of the optical layer superimposed on the plurality of second lenses. The filling lens is positioned between one of the plurality of subpixels and the first lens of a subpixel adjacent to the plurality of subpixels in the first direction. Each of the first lens and the plurality of second lenses has a convex surface in the direction opposite to the optical layer, The optical layer includes a groove in which the filling lens is arranged. A display device in which at least a portion of the groove is located outside the convex surfaces of the first lens and the plurality of second lenses.

13. The display device according to claim 12, wherein the filling lens is located between the plurality of second lenses provided for each of the plurality of subpixels.

14. The display device according to claim 13, wherein the filling lens is connected to two adjacent second lenses among the plurality of second lenses.

15. A bank including a first aperture for a first light-emitting element and a second aperture for a second light-emitting element, An optical layer superimposed on the first aperture and the second aperture, A first lens located on the optical layer and superimposed on the first aperture, A second lens located on the optical layer and superimposed on the second aperture, A first groove located within the optical layer between the first lens and the second lens, The optical layer includes a filler located within the first groove, The first groove has a recessed shape at the top of the optical layer, which is positioned in close proximity to the first lens and the second lens. A portion of the optical layer superimposed on the first lens contains the same material as a portion of the optical layer superimposed on the second lens. Each of the first lens and the second lens has a convex surface in the direction opposite to the optical layer, A display device in which at least a portion of the first groove is located outside the convex surface of the first lens and the convex surface of the second lens.

16. The filler material is connected to the first lens and the second lens, The display device according to claim 15, wherein the filler, the first lens and the second lens contain the same substance.

17. The display device according to claim 15, wherein the thickness of the first groove is equal to or less than the thickness of the optical layer.

18. The device further includes a flat film located on the first lens and the second lens, extending between the first lens and the second lens. The display device according to claim 15, wherein the flat film has a uniformly flat upper surface.

19. The first lens and the second lens are located on the same line. The display device according to claim 15, wherein each of the first lens and the second lens has a semi-cylindrical shape.

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