Light control member, display device, and method for manufacturing display device

Abstract

The present disclosure relates to a light control component, a display device, and a method for manufacturing the display device. The light control component includes: a light control substrate including a surface; and an asymmetric prism disposed on the light control substrate. The asymmetric prism includes: a first side surface extending at a first angle relative to the surface of the light control substrate; and a second side surface extending at a second angle relative to the surface of the light control substrate, the second angle being greater than the first angle. The light control component includes: an etching stopper disposed on the asymmetric prism; and at least one absorption pattern disposed on the etching stopper located on the second side surface of the asymmetric prism.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0159646, filed on December 4, 2019, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a light control member, a display device, and a method of manufacturing the display device. Background Art

[0004] The display device is used to display an image and may include a display panel such as an organic light emitting display panel or a liquid crystal display panel.

[0005] The angle of light emitted from the display surface of the display device can be the viewing angle for the viewer. A wider viewing angle provides the advantage that the display surface can be viewed without distortion regardless of the viewer's position. However, for example, in the case where the display is used in a moving vehicle, it may be necessary to limit the viewing angle in a specific environment. To this end, a light control member for controlling the angle of light emission (e.g., viewing angle) can be provided on the display panel. Summary of the Invention

[0006] Embodiments of the present invention can provide a light control member capable of easily controlling a viewing angle as desired.

[0007] Another embodiment of the present invention may provide a display device including a light control member capable of easily controlling a viewing angle as desired.

[0008] Yet another embodiment of the present invention may provide a method of manufacturing a display device including a light control member capable of easily controlling a viewing angle as desired.

[0009] According to an embodiment, a light control member may include: a light control substrate including a surface; and a scalene prism disposed on the light control substrate. The scalene prism may include: a first side surface extending at a first angle relative to the surface of the light control substrate; and a second side surface extending at a second angle relative to the surface of the light control substrate, the second angle being greater than the first angle. The light control member may include: an etch stop disposed on the scalene prism; and at least one absorption pattern disposed on the etch stop located on the second side surface of the scalene prism.

[0010] The etching stopper may be provided on the first and second side surfaces of the unequal prism.

[0011] The etch stopper may include resin.

[0012] The at least one absorption pattern may be in direct contact with the etch stopper located on the second side surface of the unequal prism.

[0013] The refractive index of the scalene prism may be approximately 1.6, the refractive index of the etch stop may be greater than the refractive index of the scalene prism, and the etch stop may include indium tin oxide (ITO), zirconium oxide (ZrO x ), hafnium oxide (HfO x ) and at least one of aluminum oxide (Al2O3).

[0014] The scalene prism may include a first prism portion contacting the light control substrate; and at least one second prism portion extending from the first prism portion and having a triangular cross-sectional shape.

[0015] The cross-sectional shape of the second prism portion may include a scalene triangle shape.

[0016] The at least one second prism part may include a plurality of second prism parts, the at least one absorption pattern may include a plurality of absorption patterns, and the plurality of absorption patterns may be respectively disposed on second side surfaces of the plurality of second prism parts.

[0017] A height of each of the plurality of absorption patterns may be approximately 1.1 times to approximately 1.4 times a pitch between adjacent absorption patterns among the plurality of absorption patterns.

[0018] A surface height of the at least one absorption pattern may be smaller than a surface height of the etch stopper.

[0019] A thickness of the etch stopper provided on the first side surface of the scalene prism may be equal to a thickness of the etch stopper provided on the second side surface of the scalene prism.

[0020] A thickness of the etch stopper disposed on the first side surface of the scalene prism may be greater than a thickness of the etch stopper disposed on the second side surface of the scalene prism.

[0021] Each of the etch stopper and the at least one absorption pattern may include a protrusion on a surface thereof, and a depth of the protrusion of the at least one absorption pattern may be greater than a depth of the protrusion of the etch stopper.

[0022] According to another embodiment, a display device may include: a first substrate; a light-emitting element disposed on the first substrate; and a light-control member disposed on the light-emitting element. The light-control member may include: a light-control substrate including a surface; and an asymmetrical prism disposed on the light-control substrate. The asymmetrical prism may include: a first side surface extending at a first angle relative to the surface of the light-control substrate; and a second side surface extending at a second angle relative to the surface of the light-control substrate, the second angle being greater than the first angle. The light-control member may include: an etching stopper disposed on the asymmetrical prism; and an absorption pattern disposed on the etching stopper located on the second side surface of the asymmetrical prism.

[0023] The scalene prism may be provided between the light control substrate and the light emitting element, and the etching stopper may be provided between the scalene prism and the light emitting element.

[0024] The light emitting element may include: a first electrode provided on the first substrate; a second electrode facing the first electrode; and an emission layer provided between the first electrode and the second electrode.

[0025] The display device may further include a bank layer disposed on the first electrode and having an opening, wherein a portion of an upper surface of the first electrode may be exposed through the opening, and the emission layer may be disposed in the opening.

[0026] The display device may further include a second substrate facing the first substrate and disposed above the light emitting element. The second substrate seals the light emitting element, and the light control member may be disposed on the second substrate.

[0027] The display device may further include an encapsulation layer disposed above the light emitting element and encapsulating the light emitting element, wherein the light control member may be disposed on the encapsulation layer.

[0028] According to another embodiment, a method for manufacturing a display device may include forming a light control member and attaching the light control member to a display panel. Forming the light control member may include forming an unequal-angle prism on a substrate, the unequal-angle prism including a first side surface extending at a first angle relative to a surface of the substrate and a second side surface extending at a second angle relative to the surface of the substrate; forming an etch stopper on the unequal-angle prism; and forming an absorption pattern on the etch stopper located on the second side surface of the unequal-angle prism.

[0029] The second angle of the second side surface may be greater than the first angle of the first side surface.

[0030] The scalene prism may include resin, and forming the scalene prism may include forming the scalene prism by embossing.

[0031] The forming of the etch stopper may include forming the etch stopper by atomic layer deposition (ALD), chemical vapor deposition (CVD), or sputtering.

[0032] The forming the absorption pattern on the etch stopper on the second side surface of the unequal prism may include: forming an absorption pattern material over the etch stopper; and dry etching to expose the etch stopper on the first side surface of the unequal prism.

[0033] It should be noted that the present disclosure is not limited to the above-mentioned aspects, and other aspects of the present disclosure will be apparent to those skilled in the art from the following description.

[0034] According to the embodiments of the present disclosure, the viewing angle can be easily controlled as needed.

[0035] The features of the present invention are not limited to those described herein. The above and other features of the present invention will become more apparent to those skilled in the art to which the present invention pertains by referring to the detailed description of the present invention given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other aspects and features of the present disclosure will become more apparent by describing in detail embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0037] Figure 1 is a schematic cross-sectional view of a light control member according to an embodiment of the present disclosure;

[0038] Figure 2 It shows the passage Figure 1 A schematic diagram of the light path of the light control member;

[0039] Figure 3 It shows in detail Figure 2 (1-1) Schematic diagram of the light path;

[0040] Figure 4 yes Figure 1 Schematic enlargement of region A shown in FIG;

[0041] Figure 5 is a flowchart schematically illustrating a method of manufacturing a display device including a light control member according to an embodiment of the present disclosure;

[0042] Figures 6 to 9are schematic cross-sectional views illustrating processing steps of a method of manufacturing a display device including a light control member according to an embodiment of the present disclosure;

[0043] Figure 10 is a schematic cross-sectional view of a light control member according to another embodiment;

[0044] Figure 11 yes Figure 10 A schematic enlarged view of region B;

[0045] Figure 12 is a schematic cross-sectional view of a light control member according to still another embodiment;

[0046] Figure 13 yes Figure 12 A schematic enlarged view of region C;

[0047] Figure 14 is a schematic cross-sectional view of a light control member according to still another embodiment;

[0048] Figure 15 yes Figure 14 A schematic enlarged view of a portion D of FIG.

[0049] Figure 16 is a schematic cross-sectional view of a light control member according to still another embodiment;

[0050] Figure 17 is a schematic perspective view of a display device according to an embodiment of the present disclosure;

[0051] Figure 18 It is along Figure 17 A schematic cross-sectional view taken along line II';

[0052] Figure 19 is a schematic cross-sectional view of a display device according to another embodiment of the present disclosure; and

[0053] Figure 20 is a schematic cross-sectional view of a display device according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0054] The specific structure and function descriptions of the embodiments disclosed herein are for illustrative purposes only. Without departing from the spirit and important features of the present disclosure, the embodiments may take many different forms. Therefore, the embodiments are disclosed for illustrative purposes only and should not be construed as limiting the present invention. That is, the present invention is limited only by the scope of the claims including any equivalents.

[0055] It will be understood that when an element is referred to as being associated with another element, such as being "coupled" or "connected" to another element, the element may be directly coupled or connected to the other element, or intervening elements may be present therebetween. In contrast, it will be understood that when an element is referred to as being associated with another element, such as being "directly coupled" or "directly connected" to another element, there may not be intervening elements. Other expressions describing relationships between elements, such as, for example, "between," "directly between," "adjacent," or "directly adjacent," should be interpreted in the same manner.

[0056] The same reference numbers will be used throughout the specification to refer to the same or like parts.

[0057] It will be understood that, although the terms "first", "second", "third", etc. may be used herein to describe different elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms can be used to distinguish an element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of this document, the "first element", "first component", "first region", "first layer" or "first part" discussed below may be named as the second element, second component, second region, second layer or second part.

[0058] The terms used herein are only for the purpose of describing specific embodiments and are not intended to be restrictive. As used herein, unless the context clearly indicates otherwise, "one", "a", "the (said)" and "at least one (kind)" do not indicate a limit to quantity, but are intended to include the singular and the plural. For example, unless the context clearly indicates otherwise, "element" and "at least one element" have the same meaning. "At least one (kind)" should not be interpreted as a restrictive "one" or "a". The terms "and" and "or" can generally be interpreted as "and / or". As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items. It will also be understood that when the terms "comprises, comprising", "has, have, having" and / or "includes (includes, including)" are used in this specification, it is to illustrate the presence of stated features, regions, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components and / or their groups.

[0059] For purposes of its meaning and interpretation, the phrase "at least one of..." is intended to include the meaning of "at least one selected from the group of..." For example, "at least one of A and B" may be understood to mean "A, B, or A and B."

[0060] Furthermore, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element as shown in the figures. It will be understood that relative terms are intended to encompass different orientations of a device in addition to the orientation depicted in the figures. For example, if a device in a figure is turned over, an element described as being on the "lower" side of the other elements would subsequently be oriented on the "upper" side of the other elements. Thus, depending on the particular orientation of the figure, the exemplary term "lower" may encompass both the "lower" and "upper" orientations. Similarly, if a device in a figure is turned over, an element described as being "below" or "beneath" other elements would subsequently be oriented "above" the other elements. Thus, the exemplary terms "below" or "under" may cover both the "upper" and "lower" orientations.

[0061] As used herein, "about" or "approximately" include the recited value and mean within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art, taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" or "approximately" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of the recited value.

[0062] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that, unless expressly defined herein, terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and should not be interpreted as an ideal or overly formal meaning.

[0063] Exemplary embodiments are described herein with reference to cross-sectional views that are schematic diagrams of idealized embodiments. As such, variations in the shapes of these figures due to, for example, manufacturing techniques and / or tolerances are anticipated. Therefore, the embodiments described herein should not be construed as limited to the specific shapes of the regions shown herein, but rather should include shape deviations that result, for example, from manufacturing. For example, a region shown or described as flat may typically have rough and / or nonlinear features. Furthermore, sharp corners shown may be rounded. Therefore, the regions shown in the figures are schematic in nature, and their shapes may not be intended to illustrate the precise shape of the regions, nor are they intended to limit the scope of the claims.

[0064] Hereinafter, embodiments will be described with reference to the accompanying drawings.

[0065] Figure 1 is a schematic cross-sectional view of a light control member according to an embodiment of the present disclosure.

[0066] The light control member 10 according to the embodiment can be used in a display device for displaying an image. The display device can be included in portable electronic devices such as mobile phones, smart phones, tablet personal computers (PCs), smart watches, watch phones, mobile communication terminals, electronic notebooks, e-books, portable multimedia players (PMPs), navigation devices, ultra-mobile PCs (UMPCs), and various electronic devices such as televisions, laptop computers, monitors, billboards, and Internet of Things devices. Although in the example shown, the light control member 10 can be used in a display device for a vehicle, it should be understood that the light control member 10 can be applied to other display devices.

[0067] refer to Figure 1 The light control member 10 according to the embodiment can be combined with a display component including a screen on which an image can be displayed. The display component may include a display panel that generates an image to display the image. The display panel may be an organic display panel including a self-luminous organic layer, or may be an inorganic display panel including a self-luminous inorganic semiconductor layer (e.g., nano-LEDs and micro-LEDs). As another example, the display panel may be a liquid crystal display panel.

[0068] When the light control member 10 can be combined with one of the above-mentioned display panels, the light control member 10 can control the path of the light emitted from the display panel. For example, when the light emitted from the display panel can be within the visible light band, the light control member 10 can control the path of the light within the visible light band. As another example, when the light emitted from the display panel can be within the ultraviolet light or infrared light band, the light control member 10 can control the optical path of the light within the ultraviolet light or infrared light band. As yet another example, the light control member 10 can control light covering the visible light band and other bands (ultraviolet light or infrared light band).

[0069] According to an embodiment, the light control member 10 may include a light control substrate 11 , a scalene prism 13 disposed on the light control substrate 11 , an etch stopper 15 disposed on the scalene prism 13 , and an absorption pattern 17 disposed on the etch stopper 15 .

[0070] The light control substrate 11 may be a transparent insulating substrate. The light control substrate 11 may include a rigid material such as glass, quartz, or a combination thereof. For example, the light control substrate 11 may include a transparent insulating rigid material. The light control substrate 11 may have a refractive index of approximately 1.5. However, it should be understood that the present disclosure is not limited thereto. The light control substrate 11 may be a flexible substrate including a flexible material such as polyimide (PI). In this case, the light control substrate 11 may be bent, folded, or rolled.

[0071] The scalene prism 13 may be provided on the light control substrate 11. The scalene prism 13 may be provided on (e.g., directly provided on) the surface of the light control substrate 11. The scalene prism 13 may include a first prism portion 13a provided on (e.g., directly provided on) the surface of the light control substrate 11 and a second prism portion 13b provided on the first prism portion 13a.

[0072] In the drawings, the first prism portion 13a may have a rectangular cross-sectional shape. The upper surface of the first prism portion 13a may extend along a first direction D1 in which the second prism portion 13b may be arranged, and the side surface of the second prism portion 13b may extend in a third direction D3 intersecting with the first direction D1 in which the second prism portion 13b may be arranged. The second prism portion 13b is arranged to extend in a second direction D2.

[0073] Each second prism portion 13 b may have a first angle θ with respect to the surface of the light control substrate 11 . 13a The first side surface 13S1 extends at a second angle θ 13b The second side surface 13S2 extends. The second angle θ 13b Can be greater than the first angle θ 13a The first angle θ 13a and the second angle θ 13b It can be changed according to different designs for adjusting the exit angle. For example, the second angle θ 13b It can be a right angle or an obtuse angle, and the first angle θ 13a The second angle θ can be an acute angle. 13b It may be in the range of approximately 90° to approximately 110° or approximately 90° to approximately 100°, or may be approximately 90°. 13a It can be in the range of approximately 30° to approximately 80° or approximately 60° to approximately 70°. As another example, the second angle θ 13b It can be an acute angle. As another example, the second angle θ 13b It can be greater than the first angle θ 13a acute angle.

[0074] The second prism portion 13b may have a triangular cross-sectional shape. Specifically, the bottom surface of each second prism portion 13b in contact with the first prism portion 13a may form the base of the triangle, and the side surfaces 13S1 and 13S2 of each second prism portion 13b may form the sides of the triangle. 13b In the case where the angle may be 90°, the cross-sectional shape of the second prism portion 13b may have a right triangle shape.

[0075] The second prism parts 13b may be arranged along a direction. All the second prism parts 13b may have the same cross-sectional shape. However, it should be understood that the present disclosure is not limited thereto.

[0076] The scalene prism 13 can be used to control the path of light incident on the scalene prism 13. More specifically, the scalene prism 13 can have a refractive index greater than the refractive index of the medium through which the light passes before reaching the scalene prism 13, thereby changing the path of the light so that the light incident on the scalene prism 13 travels closer to a vertical direction. For example, the scalene prism 13 can have a refractive index greater than the refractive index of the light control substrate 11. The scalene prism 13 can have a refractive index of approximately 1.6.

[0077] The unequal-sided prism 13 may include an organic insulating material. The unequal-sided prism 13 may include, for example, an insulating resin. The first prism portion 13a and the second prism portion 13b may include the same insulating resin. The first prism portion 13a and the second prism portion 13b may be formed integrally at the same time via the same manufacturing process. For example, the first prism portion 13a and the second prism portion 13b may be formed by embossing. However, it should be understood that the present disclosure is not limited to this. For example, the first prism portion 13a may be formed first on the surface of the light control substrate 11, and the second prism portion 13b may be formed on the first prism portion 13a. In the case where the first prism portion 13a and the second prism portion 13b may be formed sequentially, an air layer may be formed as a boundary between them. However, it should be understood that the present disclosure is not limited to this. The first prism portion 13a and the second prism portion 13b may be formed so as to have no boundary between them, as if they were formed simultaneously.

[0078] The etch stopper 15 may be provided on the scalene prism 13. The etch stopper 15 may be integrally formed with the scalene prism 13 and provided on the scalene prism 13. The etch stopper 15 may be provided on the first side surface 13S1 and the second side surface 13S2 of the scalene prism 13, and may be provided on both side surfaces of the first prism portion 13a to cover the scalene prism 13. In an embodiment, the etch stopper 15 may cover the entire surface of the scalene prism 13, including the first side surface 13S1 and the second side surface 13S2. Since the etch stopper 15 may cover the scalene prism 13, the surface of the scalene prism 13 may be prevented from being damaged by over-etching during the dry etching process for forming the absorption pattern 17 on the second side surface 13S2 of the scalene prism 13, which will be described later. In view of the above, it is desirable that the etching rate of the etch stopper 15 relative to the etching gas of the dry etching process be lower than the etching rate of the absorption pattern 17. The greater the etching selectivity (which may be the difference in etching rates) may be, the better the etching stopper 15 may protect the surface of the anisotropic prism 13 .

[0079] For example, the etching stopper 15 may include indium tin oxide (ITO), zirconium oxide (ZrO2), or the like, which has a lower etching rate with respect to an etching gas used to etch the absorption pattern 17 than the material of the absorption pattern 17 to be described later. x ), hafnium oxide (HfO x ) and at least one of aluminum oxide (Al2O3).

[0080] Since the etching stopper 15 can be provided on the first side surface 13S1 of the scalene prism 13, light emitted from the display panel can reach a portion of the etching stopper 15 before a portion of the scalene prism 13. Since the etching stopper 15 can be located in the path of the light, it is desirable that the refractive index of the etching stopper 15 can be equal to or greater than the refractive index of the scalene prism 13 so as to guide the light toward the vertical direction of the scalene prism 13. In view of the above, the refractive index of the etching stopper 15 can be equal to or greater than approximately 1.6, which can be the above-described refractive index of the scalene prism 13. Since the etching stopper 15 can be made of ITO, ZrO2, which has a lower etching rate with respect to the etching gas used to etch the absorption pattern 17 than the material of the absorption pattern 17, x , HfO x and Al2O3 (whose refractive indices may be approximately 1.8, approximately 2.2, approximately 1.9, and approximately 1.7, respectively), so the etching stopper 15 may satisfy the above conditions.

[0081] The etching stopper 15 can be formed on the surface of the scalene prism 13 by atomic layer deposition (ALD). By forming the etching stopper 15 on the surface of the scalene prism 13 in this way, the etching stopper 15 can not only have a shape consistent with the scalene prism 13, but also have a uniform thickness. In an embodiment, the etching stopper 15 can have a uniform thickness throughout its entire area. When the etching stopper 15 located in the light path has a uniform thickness, it is easier to adjust the path of light incident through the light control member 10.

[0082] The absorption pattern 17 may be provided on the etching stopper 15, which may be provided on the scalene prism 13. The absorption pattern 17 may be provided on the etching stopper 15, which may be provided on the second side surface 13S2 of the scalene prism 13. As described above, since the etching stopper 15 may be provided and may cover the scalene prism 13, the absorption pattern 17 may not contact the scalene prism 13.

[0083] Will refer to Figure 4 The etch stopper 15 and the absorption pattern 17 are described in more detail.

[0084] Figure 4 yes Figure 1 Schematic enlargement of region A shown in FIG.

[0085] refer to Figure 4 , as referenced above Figure 1 As described, the etch stopper 15 can be formed on the surface of the scalene prism 13 by atomic layer deposition (ALD) so that it can have a uniform thickness. Specifically, the thickness t2 of the portion of the etch stopper 15 that can be disposed on the first side surface 13S1 of the scalene prism 13 can be substantially equal to the thickness t3 of the portion of the etch stopper 15 that can be disposed on the second side surface 13S2 of the scalene prism 13. Specifically, the difference between the thickness t2 of the portion of the etch stopper 15 that can be disposed on the first side surface 13S1 of the scalene prism 13 and the thickness t3 of the portion of the etch stopper 15 that can be disposed on the second side surface 13S2 of the scalene prism 13 can be approximately 10%, approximately 5%, approximately 1%, or less.

[0086] According to the method of manufacturing a display device to be described later, the absorption pattern 17 can be formed on the surface (or the entire surface) of the etching stopper 15 having a shape consistent with the shape of the unequal prism 13, and can then be subjected to dry etching. The absorption pattern material located on the first side surface 13S1 of the unequal prism 13 can have a smaller thickness in the thickness direction than the absorption pattern material provided on the second side surface 13S2 of the unequal prism 13, and therefore, the absorption pattern material located on the first side surface 13S1 can be removed. Even after the absorption pattern material located on the first side surface 13S1 of the unequal prism 13 can be removed, the absorption pattern material located on the second side surface 13S2 of the unequal prism 13 can also remain. Therefore, a structure such as Figure 1 and Figure 4 The absorption pattern shown in 17. Figure 4 As shown, the absorption pattern 17 may expose a portion of the upper end of the etching stopper 15. Since the absorption pattern material provided on the second side surface 13S2 of the unequal prism 13 is also partially removed by dry etching, the exposed portion may be formed. The length or width t of the exposed portion is 17 It may be greater than or less than the thickness (second thickness) t2 . That is, the surface height of the absorption pattern 17 is less than the surface height of the etch stopper 15 .

[0087] The absorption pattern 17 may be provided on the second side surface 13S2 of each second prism portion 13b of the unequal prism 13. In the case where light may be incident on the light control member 10, the absorption pattern 17 may absorb some of the light incident thereon to control the path of the light. 13b In the case of, for example, a right angle, as described above, since the thickness of the etch stopper 15 may be substantially uniform over the entire area thereof, the absorption pattern 17 may have a shape extending in the vertical direction in the drawing.

[0088] like Figure 1 As shown in , the absorption pattern 17 can be provided on the second side surface 13S2 of each second prism portion 13b and can be repeated at a pitch P. The length or height (surface height) t1 of the absorption pattern 17 can be designed in consideration of the pitch P between adjacent absorption patterns 17. For example, the length t1 of the absorption pattern 17 can be approximately 1.1 to 1.4 times, approximately 1.3 times or greater, or approximately 1.2 times the pitch P of the absorption pattern 17. In order to prevent light exceeding the viewing angle from being emitted through the light control member 10, the length t1 of the absorption pattern 17 may need to be within the above range.

[0089] According to an embodiment of the present disclosure, in order to change the path of light, the light control member 10 may have a refractive index greater than the refractive index of the medium through which the light passes before reaching the scalene prism 13. This allows the length t1 of the absorption pattern 17 to be reduced, as the light can be turned toward the vertical direction as it passes through the scalene prism 13. By reducing the length t1 of the absorption pattern 17, the amount of light absorbed by the absorption pattern 17 can be reduced, thereby improving the overall transmittance of the light control member 10.

[0090] In the following, reference will be made to Figure 2 The light absorption process by the absorption pattern 17 and the light path control process by the unequaled prism 13 are described in more detail.

[0091] Figure 2 It shows the passage Figure 1 Schematic diagram of the light path of the light control member.

[0092] refer to Figure 2 In an embodiment, an adhesive member AM may be disposed below the light control member 10, and the glass substrate UG may be attached below the adhesive member AM. The adhesive member AM may be used to bond the light control member 10 to the glass substrate UG. The adhesive member AM may include a transparent adhesive material, as the glass substrate UG may need to transmit light to the light control member 10 without loss. For example, the adhesive member AM may be, but is not limited to, an optically clear adhesive (OCA) or an optically clear resin (OCR).

[0093] exist Figure 2 In the example shown, for ease of illustration, the refractive index of the glass substrate UG can be approximately 1.5, the refractive index of the adhesive member AM can be approximately 1.5, the refractive index of the unequal-sided prism 13 of the light control member 10 can be approximately 1.6, the refractive index of the light control substrate can be approximately 1.5, and the refractive index of the air layer Air above the light control substrate 11 can be approximately 1.0.

[0094] Light L11, L12, L21, and L22 incident through the glass substrate UG can pass through the glass substrate UG and the adhesive member AM. Since the glass substrate UG and the adhesive member AM have the same refractive index, the light L11, L12, L21, and L22 are not refracted at the interface therebetween.

[0095] (1-1) light L11 and (1-2) light L12 may be incident on the absorption pattern 17. The light L11 and L12 incident on the absorption pattern 17 may be Figure 1 The absorption pattern 17 described absorbs and extinguishes. Figure 3 Give a more detailed description thereof.

[0096] Figure 3It shows in detail Figure 2 (1-1) Schematic diagram of the light path.

[0097] refer to Figure 3 , the absorption pattern 17 may have a plurality of layers. The plurality of layers may have at least one metal layer and at least one insulating layer. The absorption pattern 17 may include a plurality of layers of metal layers and insulating layers alternately stacked on each other. Figure 3 In the example shown, refer to Figure 3 The absorption pattern 17 includes a first metal layer 171 disposed on (e.g., directly disposed on) the side surface of the etch stopper 15, an insulating layer 173 disposed on (e.g., directly disposed on) the first metal layer 171, and a second metal layer 175 disposed on (e.g., directly disposed on) the insulating layer 173. However, it should be understood that the present disclosure is not limited thereto.

[0098] The metal layers 171 and 175 may include at least one of cobalt (Co), tantalum (Ta), and aluminum (Al). The first metal layer 171 and the second metal layer 175 may be made of the same material. Although each of the first metal layer 171 and the second metal layer 175 includes tantalum (Ta) in the illustrated example, the present disclosure is not limited thereto.

[0099] The (1-1) light L11 incident on the absorption pattern 17 may be reflected by the second metal layer 175, or may pass through the second metal layer 175 and the insulating layer 173 to be reflected by the first metal layer 171. The interval between the first metal layer 171 and the second metal layer 175, that is, the width or thickness of the insulating layer 173 may be determined based on the path difference between the light reflected by the second metal layer 175 and the light reflected by the first metal layer 171 to allow destructive interference.

[0100] For example, the amplitude (y-axis) of the light reflected by the second metal layer 175 with respect to time (x-axis) may have the same amount but opposite polarity relative to the light reflected by the first metal layer 171. For example, the light reflected by the second metal layer 175 and the light reflected by the first metal layer 171 may cancel each other, and thus, the reflected (1-1) light L11 may be absorbed.

[0101] According to an embodiment of the present disclosure, the outgoing emission angle θ1 or viewing angle of light passing through the light control member 10 can be within a range of approximately 0° to approximately 30°. The (2-1) light L21 can be incident on the glass substrate UG at an incident angle θ3 that is greater than the incident angle θ4 of the (2-2) light L22. The (2-1) light L21 and the (2-2) light L22 can be refracted at the interface between the glass substrate UG and air, causing them to travel in a direction closer to vertical. They can pass through the interface between the glass substrate UG and the adhesive member AM without refraction and can be incident on the light control member 10.

[0102] Because the refractive index of the scalene prisms 13 of the light control member 10 can be greater than the refractive index of the adhesive member AM thereunder, the (2-1) light L21 and (2-2) light L22 incident on the light control member 10 can be further refracted upward and can travel toward the interface between the scalene prisms 13 and the light control substrate 11. Because the refractive index of the light control substrate 11 can be less than the refractive index of the scalene prisms 13, the light can be further refracted downward at the interface between the scalene prisms 13 and the light control substrate 11. The (2-1) light L21 and (2-2) light L22 that have passed through the light control substrate 11 can be refracted toward the lower side at the interface between the light control substrate 11 and the air layer and emerge. In order to make the exit angle θ1 of the (2-1) light L21 (e.g., R3) and the (2-2) light L22 (e.g., R4) range from approximately 0° to approximately 30°, the incident angle can be set to range from approximately 7.6° to approximately 69.4°.

[0103] If the scalene prism 13 is not present, then in order to make the exit angle θ1 within the range of approximately 0° to approximately 30°, the incident angle should also be within the range of approximately 0° to approximately 30°. In contrast, by adopting the scalene prism 13 according to the embodiment, the incident angle can be greatly increased, and therefore, the incident area can be increased. In this way, light can be incident on a larger incident area, and thus the transmittance can be improved.

[0104] As referenced above Figure 1 As described above, light can be redirected in a vertical direction while passing through the asymmetrical prism 13, and therefore, it is not necessary to significantly increase the length t1 of the absorption pattern 17. Therefore, the length t1 of the absorption pattern 17 can be reduced. By reducing the length t1 of the absorption pattern 17, the amount of light absorbed by the absorption pattern 17 can be reduced, thereby improving the overall transmittance of the light control member 10.

[0105] Hereinafter, a method of manufacturing a display device including a light control member according to an embodiment of the present disclosure will be described. In the following description, the same or similar elements will be denoted by the same or similar reference numerals, and redundant descriptions will be omitted or briefly described.

[0106] Figure 5 is a flowchart schematically illustrating a method of manufacturing a display device including a light control member according to an embodiment of the present disclosure. Figures 6 to 9 are schematic cross-sectional views illustrating processing steps of a method of manufacturing a display device including a light control member according to an embodiment of the present disclosure.

[0107] First combine Figure 1 refer to Figure 5 and Figure 6, an unequal prism 13 may be formed on the light control substrate 11, which may include a first angle θ relative to the surface of the light control substrate 11. 13a The first side surface 13S1 extends and is at a greater angle than the first angle θ 13a The second angle θ 13b The second side surface 13S2 is extended (step S10).

[0108] The configuration, shape, function, and material of the unequal-sided prism 13 have been described above; and therefore, redundant description will be omitted.

[0109] The scalene prism 13 can be used to control the path of light incident on the scalene prism 13. More specifically, the scalene prism 13 can have a refractive index greater than the refractive index of the medium through which the light travels before the scalene prism 13, thereby changing the path of the light so that the light incident on the scalene prism 13 travels closer to a vertical direction. For example, the scalene prism 13 can have a refractive index greater than the refractive index of the light control substrate 11. The prism 13 can have a refractive index of approximately 1.6.

[0110] The prism 13 may include an organic insulating material. The prism 13 may include, for example, an insulating resin. The first prism portion 13a and the second prism portion 13b may include the same insulating resin. The first prism portion 13a and the second prism portion 13b may be formed integrally at the same time via the same manufacturing process. For example, the first prism portion 13a and the second prism portion 13b may be formed by embossing. However, it should be understood that the present disclosure is not limited to this. The first prism portion 13a may be formed first on the surface of the light control substrate 11, and the second prism portion 13b may be formed on the first prism portion 13a. In the case where the first prism portion 13a and the second prism portion 13b may be formed sequentially, an air layer may be formed as a boundary between them. However, it should be understood that the present disclosure is not limited to this. The first prism portion 13a and the second prism portion 13b may be formed so as to have no boundary between them, as if they were formed simultaneously.

[0111] refer to Figure 5 and Figure 7 , an etching stopper 15 may be formed on the scalene prism 13 (step S20 ).

[0112] The position, material, and function of the etching stopper 15 have been described above; and therefore, redundant description will be omitted.

[0113] The etching stopper 15 may include ITO, ZrO, or the like having a lower etching rate than the material of the absorption pattern 17 with respect to the etching gas used to etch the absorption pattern 17. x , HfO x and at least one of Al2O3.

[0114] Since the etch stopper 15 can be disposed on the first side surface 13S1 of the scalene prism 13, light emitted from the display panel can reach a portion of the etch stopper 15 before a portion of the scalene prism 13. Because the etch stopper 15 can be located in the light path, it is desirable that the refractive index of the etch stopper 15 be equal to or greater than that of the scalene prism 13 in order to guide the light in a direction perpendicular to the scalene prism 13. Considering the above, the refractive index of the etch stopper 15 can be equal to or greater than approximately 1.6, which can be the refractive index of the scalene prism 13 described above. ITO, ZrO, HfO, or Al2O3, which are selected to have a lower etching rate relative to the etching gas used to etch the absorption pattern 17 than the material of the absorption pattern 17, can have refractive indices of approximately 1.8, approximately 2.2, approximately 1.9, and approximately 1.7, respectively. Therefore, they can meet the requirements.

[0115] The etching stopper 15 can be formed on the surface of the scalene prism 13 by atomic layer deposition (ALD). By forming the etching stopper 15 on the surface of the scalene prism 13 in this manner, the etching stopper 15 can not only have a shape consistent with the scalene prism 13, but also have a uniform thickness. When the etching stopper 15 located in the light path has a uniform thickness, it is easier to adjust the path of light incident through the light control member 10.

[0116] Then, combined Figure 1 refer to Figure 5 、 Figure 8 and Figure 9 , an absorption pattern 17 may be formed on the etching stopper 15 located on the second side surface 13S2 of the inconsecutive prism 13 (step S30 ).

[0117] The step S30 of forming the absorption pattern 17 may include forming an absorption pattern material 17 a on the etch stopper 15 and etching the absorption pattern material 17 a formed on the etch stopper 15 .

[0118] Forming the absorption pattern material 17 a on the etch stopper 15 may include forming the absorption pattern material 17 a on a surface (or an entire surface) of the etch stopper 15 .

[0119] The absorption pattern material 17a may be formed on the etch stopper 15 by atomic layer deposition (ALD). By forming the absorption pattern material 17a by atomic layer deposition (ALD), the absorption pattern material 17a may have a substantially uniform thickness on the surface of the etch stopper 15 and may have a shape that conforms to the surface of the etch stopper 15.

[0120] After the absorption pattern material 17a is formed on the surface (or the entire surface) of the etch stopper 15, the absorption pattern material 17a may be etched. Etching the absorption pattern material 17a may include a dry etching step. Dry etching may be performed using etching gases such as chlorine (Cl2) and fluorine (F2).

[0121] The etch stopper 15 can cover the surface (or the entire surface) of the scalene prism 13, thereby preventing the surface of the scalene prism 13 from being damaged by excessive etching by the etching gas during the process. Considering the above, it is desirable that the etching rate of the etch stopper 15 relative to the etching gas used in dry etching can be lower than the etching rate of the absorption pattern 17. The greater the etching selectivity (which can be the difference in etching rate), the better the etch stopper 15 can protect the surface of the scalene prism 13.

[0122] As described above, the absorption pattern material located on the first side surface 13S1 of the scalene prism 13 may have a smaller thickness in the thickness direction than the absorption pattern material provided on the second side surface 13S2 of the scalene prism 13, and therefore, the absorption pattern material located on the first side surface 13S1 may be removed. Even after the absorption pattern material located on the first side surface 13S1 of the scalene prism 13 may be removed, the absorption pattern material located on the second side surface 13S2 of the scalene prism 13 may remain. Thus, a structure such as Figure 1 and Figure 4 The absorption pattern shown in 17. Figure 4 As shown in FIG, the absorption pattern 17 may expose a portion of the upper end of the etching stopper 15. Since the absorption pattern material provided on the second side surface 13S2 of the unequal prism 13 may also be partially removed by dry etching, the exposed portion may be formed. The length or width t of the exposed portion 17 It may be larger or smaller than the thickness (second thickness) t2.

[0123] Subsequently, the light control member 10 and the display panel may be attached together (step S40 ).

[0124] The display panel may be an organic display panel including a self-luminous organic layer, or may be an inorganic display panel including a self-luminous inorganic semiconductor layer (eg, nano-LED and micro-LED). As another example, the display panel may be a liquid crystal display panel.

[0125] The light control member 10 and the display panel may be bonded together via a bonding member or a transparent adhesive member. The transparent adhesive member may include, but is not limited to, an optically clear adhesive (OCA), an optically clear resin (OCR), or a combination thereof.

[0126] Hereinafter, a light control member according to another embodiment will be described.

[0127] Figure 10 is a schematic cross-sectional view of a light control member according to another embodiment. Figure 11 yes Figure 10 Schematic enlarged view of region B.

[0128] Figure 10 and Figure 11 Examples and Figure 1 The embodiment may be different in that the light control member 10_1 may further include a protrusion on a surface thereover or on upper surfaces of the etch stopper 15_1 and the absorption pattern 17_1.

[0129] More specifically, in the case where dry etching is performed to form the absorption pattern 17_1 , a protrusion may be formed in each of the absorption pattern 17_1 and the etch stopper 15_1 .

[0130] As referenced above Figure 9 As described, the selectivity of the etching gas with respect to the absorption pattern 17_1 may be higher than the selectivity of the etching gas with respect to the etch stopper 15_1. For this reason, the depth d1 of the protrusion on the surface of the etch stopper 15_1 may be smaller than the depth d2 of the protrusion on the surface of the absorption pattern 17_1.

[0131] Figure 12 is a schematic cross-sectional view of a light control member according to still another embodiment. Figure 13 yes Figure 12 Schematic enlarged view of region C.

[0132] Figure 12 and Figure 13 Examples and Figure 1 The embodiment may be different in that the light control member 10_2 may be formed by chemical vapor deposition (CVD) or sputtering instead of atomic layer deposition (ALD), and thus, the etch stopper 15_2 may have a non-uniform thickness.

[0133] More specifically, the thickness t4 of the etch stopper 15_2 on the first side surface 13S1 of the scalene prism 13 may be greater than the thickness t3 of the etch stopper 15_2 on the second side surface 13S2 of the scalene prism 13 .

[0134] In addition, when the etching stopper 15_2 is formed by chemical vapor deposition (CVD) or sputtering, the step coverage (reflecting the degree of step difference of the feature below the surface) can be reduced compared to the etching stopper formed by atomic layer deposition (ALD). Therefore, the end or inflection point of the irregular prism 13 may not reflect the shape of the end or curved portion of the feature below it, but may have a substantially curved shape that may bulge outward.

[0135] Figure 14 is a schematic cross-sectional view of a light control member according to still another embodiment. Figure 15 yes Figure 14 Schematic enlarged view of part D of FIG.

[0136] Figure 14 and Figure 15 Examples and Figure 12 and Figure 13 The embodiment may be different in that the etching stopper 15_3 formed on the second side surface 12S2 of the inconsecutive prism 13 may have different thicknesses.

[0137] More specifically, in the light control member 10_3 according to this embodiment, the etching stopper 15_3 provided on the second side surface 13S2 of the scalene prism 13 may have different thicknesses. In other words, the thickness t5 of the portion of the etching stopper 15_3 closer to the end of the scalene prism 13 (the upper portion in the drawing) may be greater than the thickness t3 of the portion of the etching stopper 15_3 farther from the end of the scalene prism 13 (the lower portion in the drawing). This may occur when the etching stopper 15_3 is formed by chemical vapor deposition (CVD) or sputtering as described above, because the deposition equipment may eject the deposition material from above, and thus the deposition material may first be deposited on the portion near the end of the scalene prism 13. As a result, the portion below it may be blocked by the deposition material, and a small amount of deposition material may be deposited on the lower portion, and the absorption pattern 17_2 may be in contact with the lower portion.

[0138] Figure 16 is a schematic cross-sectional view of a light control member according to still another embodiment.

[0139] Figure 16 Examples and Figure 14 and Figure 15 The embodiment may be different in that the etch stopper 15_4 may expose a portion of the second side surface 13S2 of the inconsequential prism 13 .

[0140] More specifically, in the light control member 10_4 according to this embodiment, the etch stopper 15_4 may expose a portion of the second side surface 13S2 of the scalene prism 13 , and the absorption pattern 17_3 may contact the exposed portion of the second side surface 13S2 of the scalene prism 13 .

[0141] Hereinafter, a display device including the light control member described above will be described. In the following description, the same or similar elements will be denoted by the same or similar reference numerals, and redundant descriptions will be omitted.

[0142] Figure 17 is a schematic perspective view of a display device according to an embodiment of the present disclosure. Figure 18 It is along Figure 17 Schematic cross-sectional view taken along line II'.

[0143] refer to Figure 17 and Figure 18 The display device 100 according to this embodiment may include a light control member 10'. The display device 100 may further include a display part 20 and a bonding member 30 disposed between the display part 20 and the light control member 10' to bond them together.

[0144] The light control member 10' can be the same as that Figure 1 The light control member 10 described has substantially the same construction. Figure 10 The light control member 10_1, Figure 12 The light control member 10_2, Figure 14 The light control member 10_3 and Figure 16 Any one of the light control members 10_4 serves as the light control member 10 ′.

[0145] In an embodiment, the first direction DR1 may intersect with the second direction DR2. Figure 17 In the perspective view of FIG, for the convenience of illustration, the first direction DR1 and the second direction DR2 may be defined as two directions within the horizontal plane where the display device 100 is located, and the third direction DR3 may be defined as the vertical direction (perpendicular to the first direction D1 and the second direction D2) of the display device 100. It should be understood that the directions referenced with respect to the embodiments may be relative directions, and the embodiments are not limited to the mentioned directions.

[0146] The display device 100 according to an embodiment of the present disclosure may be an organic light-emitting display device including an organic display panel including a self-luminous organic layer.

[0147] The display device 100 may include a display area DA for displaying an image and a non-display area NDA disposed around the display area DA. The display area DA may include pixels.

[0148] Although the display device 100 may have a rectangular shape viewed from the top, the present disclosure is not limited thereto. It should be understood that the display device 100 may have a square shape, a circular shape, an elliptical shape, or other polygonal shapes.

[0149] The display part 20 may include a first substrate 21 and a light emitting element provided on the first substrate 21 .

[0150] The first substrate 21 may be an insulating substrate. The first substrate 21 may include a transparent material. For example, the first substrate 21 may include a transparent insulating material such as glass, quartz, or a combination thereof. The first substrate 21 may be a rigid substrate. However, the first substrate 21 is not limited to those described above. The first substrate 21 may include a plastic such as polyimide. The first substrate 21 may be flexible so that it can be bent, folded, or rolled.

[0151] The pixel electrodes 22 may be disposed on the surface of the first substrate 21. Each pixel electrode 22 may be disposed in a corresponding pixel. The pixel electrode 22 of one pixel may be spaced apart from the pixel electrode of an adjacent pixel. A circuit layer (not shown) for driving the pixel electrodes 22 may be disposed between the first substrate 21 and the pixel electrodes 22. The circuit layer may include thin film transistors and capacitors.

[0152] The pixel electrode 22 may be a first electrode of a light-emitting element (or light-emitting diode), for example, an anode. The pixel electrode 22 may have a material layer with a high work function such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), and indium oxide (In2O3) and a stacked structure of a reflective material layer such as silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), lead (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), or a mixture thereof. The material layer with a higher work function may be provided on a layer higher than the reflective material layer so that it may be closer to the emissive layer 24. The pixel electrode 22 may have, but is not limited to, a multilayer structure of ITO / Mg, ITO / MgF, ITO / Ag, and ITO / Ag / ITO.

[0153] The dam layer 23 may be provided on the surface of the first substrate 21 along the boundaries of the pixels. The dam layer 23 may be provided above the pixel electrodes 22 and may include openings that expose the pixel electrodes 22, respectively. The dam layer 23 may include an organic insulating material such as a polyacrylate resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polyphenylene oxide resin, a polyphenylene sulfide resin, benzocyclobutene (BCB), or a combination thereof. The dam layer 23 may include an inorganic material.

[0154] The emission layer 24 may be disposed on the pixel electrode 22 exposed via the dam layer 23. In an embodiment where the display device may be an organic light-emitting display device, the emission layer 24 may include an organic layer comprising an organic material. The organic layer may include an organic emission layer, and in some embodiments may further include a hole injection / transport layer and / or an electron injection / transport layer as auxiliary layers to facilitate emission. In another embodiment where the display device may be a micro-LED display device, a nano-LED display device, or the like, the emission layer 24 may include an inorganic material such as an inorganic semiconductor.

[0155] The common electrode 25 may be disposed on the emission layer 24. The common electrode 25 may be in contact with the bank layer 23 and an upper surface of the emission layer 24.

[0156] The common electrode 25 may extend across the pixels. The common electrode 25 may be a single continuous piece arranged in all pixels. The common electrode 25 may be the second electrode of the light emitting diode, ie, the cathode.

[0157] The common electrode 25 may include a material layer having a small work function, such as Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF, and Ba, or a compound or mixture thereof (e.g., a mixture of Ag and Mg). The common electrode 25 may also include a transparent metal oxide layer disposed on the material layer having a small work function.

[0158] The pixel electrode 22, the emission layer 24, and the common electrode 25 may form a light emitting element, such as an organic light emitting element. Light emitted from the emission layer 24 may pass through the common electrode 25 to be emitted upward.

[0159] The thin film encapsulation feature 27 may be disposed above the common electrode 25. The thin film encapsulation feature 27 may include an encapsulation substrate or a second substrate. The encapsulation substrate may be an insulating substrate. The encapsulation substrate may include a transparent material. For example, the encapsulation substrate may include a transparent insulating material such as glass, quartz, or a combination thereof. The encapsulation substrate may be a rigid substrate. The encapsulation substrate may be of the same type as the first substrate 21, or may be a substrate having a different material, thickness, transmittance, etc. from the first substrate 21. For example, the encapsulation substrate may have a transmittance that is higher than the transmittance of the first substrate 21. The encapsulation substrate may be thicker or thinner than the first substrate 21.

[0160] However, the encapsulation substrate is not limited to those described above. The encapsulation substrate may include plastic such as polyimide. The encapsulation substrate may be flexible so that it can be bent, curved, folded, or rolled.

[0161] The sealing member 26 may be disposed between the thin film encapsulation feature 27 and the first substrate 21. The sealing member 26 may be disposed in the non-display area NDA. The sealing member 26 may be disposed between the upper surface of the dam layer 23 and the thin film encapsulation feature 27, and may also contact the upper surface of the dam layer 23 and the thin film encapsulation feature 27 to bond the first substrate 21 to the thin film encapsulation feature 27.

[0162] The light control member 10' described above may be disposed on the thin film encapsulation feature 27. The bonding member 30 may be disposed between the light control member 10' and the thin film encapsulation feature 27. The scalene prism 13' may be disposed between the light control substrate 11' of the light control member 10' and the bonding member 30. The etching stopper 15' may be disposed between the scalene prism 13' and the bonding member 30. The bonding member 30 may contact the exposed absorption pattern 17' of the light control member 10' and the etching stopper 15'.

[0163] Figure 19 is a schematic cross-sectional view of a display device according to another embodiment of the present disclosure.

[0164] according to Figure 19 The display device 100_1 of the embodiment and Figure 18 The embodiment of the present invention may differ in that the thin film encapsulation feature 28 of the display component 20_1 may be different from Figure 18 Thin film encapsulation features 27.

[0165] More specifically, the thin film encapsulation feature 28 according to this embodiment may include at least one thin film encapsulation layer. For example, the thin film encapsulation layer may include a first inorganic layer 28a, an organic layer 28b, and a second inorganic layer 28c. Each of the first inorganic layer 28a and the second inorganic layer 28c may include silicon nitride, silicon oxide, silicon oxynitride, or a combination thereof. The organic layer 28b may include an organic insulating material such as a polyacrylate resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polyphenylene ether resin, a polyphenylene sulfide resin, benzocyclobutene (BCB), or a combination thereof.

[0166] The bonding member 30 may be disposed between the light control member 10' and the thin film encapsulation feature 28. The bonding member 30 may contact the exposed absorption pattern 17' and the etch stopper 15' of the light control member 10' and contact the second inorganic layer 28c of the thin film encapsulation feature 28.

[0167] Figure 20 is a schematic cross-sectional view of a display device according to yet another embodiment of the present disclosure.

[0168] Figure 20 Examples and Figure 18 The embodiment may differ in that the display device 100_2 may be a liquid crystal display device, wherein the display component 20_2 may include a liquid crystal display panel.

[0169] More specifically, the display device 100_2 according to this embodiment may be a liquid crystal display device, wherein the display component 20_2 may include a liquid crystal display panel.

[0170] The display component 20_2 may include a first substrate 21, a second substrate (thin film encapsulation feature) 27 facing the first substrate 21, a dam layer 23 arranged on the first substrate 21, pixel electrodes 22' respectively arranged in the openings of the dam layer 23, a common electrode CME arranged on the lower surface of the second substrate (thin film encapsulation feature) 27, and a liquid crystal layer LCL arranged between the common electrode CME and the pixel electrode 22' and including liquid crystal molecules LC.

[0171] The pixel electrode 22' and Figure 18 The pixel electrode 22 may be different in that the pixel electrode 22 ′ may be disposed on the bank layer 23 , that is, disposed on a portion of the side surface and the upper surface of the bank layer 23 .

[0172] Common electrode CME and Figure 18 The difference of the common electrode CME may be that the common electrode CME may not be provided on the first substrate 21 , but may be provided on the second substrate (thin film encapsulation feature) 27 .

[0173] Other components can be compared with the above reference Figure 18 Those elements described are the same; and therefore, redundant descriptions will be omitted.

[0174] Other components can be compared with the above reference Figure 4 Those elements described are the same; and therefore, redundant descriptions will be omitted.

[0175] Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims including any equivalents.

Claims

1. A light control member, wherein: The light control member includes: A light control substrate comprising a surface; an unequal-sided prism, disposed on the light control substrate and comprising: a first side surface extending at a first angle relative to the surface of the light control substrate; and a second side surface extending at a second angle relative to the surface of the light control substrate, the second angle being greater than the first angle; an etching stopper provided at least on the second side surface of the unequal prism; and At least one absorption pattern is provided on the etching stopper located on the second side surface of the unequal prism.

2. The light control member according to claim 1, wherein The etching stopper is provided on the first side surface and the second side surface of the unequal prism.

3. The light control member according to claim 2, wherein The scalene prism includes resin.

4. The light control member according to claim 2, wherein The at least one absorption pattern is in direct contact with the etch stopper on the second side surface of the unequal prism.

5. The light control member according to claim 1, wherein The refractive index of the unequal-sided prism is 1.6, The etch stop has a refractive index greater than the refractive index of the scalene prism, and The etch stopper includes at least one of indium tin oxide, zirconium oxide, hafnium oxide, and aluminum oxide. The light control member according to claim 1 , wherein The scalene prism comprises: a first prism portion in contact with the light control substrate; and At least one second prism portion extends from the first prism portion and has a triangular cross-sectional shape.

7. The light control member according to claim 6, wherein The cross-sectional shape of the second prism portion includes a scalene triangle shape.

8. The light control member according to claim 6, wherein the at least one second prismatic portion comprises a plurality of second prismatic portions, The at least one absorption pattern includes a plurality of absorption patterns, and The plurality of absorption patterns are respectively disposed on second side surfaces of the plurality of second prism parts.

9. The light control member according to claim 8, wherein A height of each of the plurality of absorption patterns is 1.1 to 1.4 times a pitch between adjacent absorption patterns among the plurality of absorption patterns.

10. The light control member according to claim 1, wherein A surface height of the at least one absorption pattern is smaller than a surface height of the etch stopper.

11. The light control member according to claim 1, wherein The thickness of the etching stopper provided on the first side surface of the scalene prism is equal to the thickness of the etching stopper provided on the second side surface of the scalene prism.

12. The light control member according to claim 1, wherein The thickness of the etching stopper provided on the first side surface of the scalene prism is greater than the thickness of the etching stopper provided on the second side surface of the scalene prism.

13. The light control member according to claim 1, wherein Each of the etch stopper and the at least one absorption pattern includes a protrusion on a surface thereof, and A depth of the protrusion of the at least one absorption pattern is greater than a depth of the protrusion of the etch stopper.

14. A display device, wherein: The display device includes: a first substrate; a light-emitting element, disposed on the first substrate; and a light control member provided on the light emitting element, Wherein, the light control member comprises: A light control substrate comprising a surface; an unequal-sided prism, disposed on the light control substrate and comprising: a first side surface extending at a first angle relative to the surface of the light control substrate; and a second side surface extending at a second angle relative to the surface of the light control substrate, the second angle being greater than the first angle; an etching stopper provided at least on the second side surface of the unequal prism; and An absorption pattern is provided on the etching stopper located on the second side surface of the unequal prism.

15. The display device according to claim 14, wherein The scalene prism is disposed between the light control substrate and the light emitting element, and The etching stopper is disposed between the scalene prism and the light emitting element.

16. The display device according to claim 15, wherein The light emitting element comprises: a first electrode, disposed on the first substrate; a second electrode facing the first electrode; and The emission layer is arranged between the first electrode and the second electrode.

17. The display device according to claim 16, wherein: The display device further includes a bank layer, which is disposed on the first electrode and has an opening, wherein: A portion of the upper surface of the first electrode is exposed through the opening, and The emission layer is disposed in the opening.

18. The display device according to claim 17, wherein: The display device further includes: a second substrate facing the first substrate and disposed above the light emitting element, wherein: The second substrate seals the light emitting element, and The light control member is provided on the second substrate.

19. The display device according to claim 17, wherein: The display device further includes an encapsulation layer disposed above the light emitting element and encapsulating the light emitting element, wherein the light control member is disposed on the encapsulation layer.

20. A method for manufacturing a display device, wherein: The method comprises: forming a light control member; and attaching the light control member to a display panel, Wherein, forming the light control member comprises: forming a scalene prism on a substrate, the scalene prism including a first side surface extending at a first angle relative to a surface of the substrate and a second side surface extending at a second angle relative to the surface of the substrate; forming an etching stopper on at least the second side surface of the unequal prism; and An absorption pattern is formed on the etch stopper located on the second side surface of the unequal prism.

21. The method according to claim 20, wherein The second angle of the second side surface is greater than the first angle of the first side surface.

22. The method according to claim 20, wherein The scalene prism comprises a resin, and The forming of the scalene prism includes forming the scalene prism by embossing.

23. The method according to claim 20, wherein The forming of the etch stopper includes forming the etch stopper by atomic layer deposition, chemical vapor deposition, or sputtering.

24. The method according to claim 20, wherein The forming the absorption pattern on the etching stopper located on the second side surface of the unequal prism includes: forming an absorption pattern material over the etch stopper; and Dry etching is performed to expose the etch stopper on the first side surface of the anisotropic prism.

Images