Cover window and display device

Abstract

The invention provides a cover window and a display device. A cover window according to an embodiment includes a base layer and a first sub-opaque layer disposed on the base layer, and the first sub-opaque layer includes an additive having magnetism.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0144678 filed in the Korean Intellectual Property Office on October 26, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a cover window, a display device including the cover window, and a method of manufacturing the cover window. Background Art

[0004] The cover window may be disposed on the front face of a display panel such as a liquid crystal display panel, a plasma display panel, or an organic light emitting display panel to protect the display panel.

[0005] The cover window may be attached and fixed to an outer surface of the display panel so that a user can recognize an input of the user or an output of the device from the outside.

[0006] A cover window may be placed on an exterior surface of a device to influence the design of the device.

[0007] It should be understood that this background technology section is intended to provide, in part, a useful background for understanding the technology. However, this background technology section may also include ideas, concepts or understandings that are not part of the subject matter disclosed herein that were known or understood by a person skilled in the relevant art before the corresponding effective filing date. Summary of the invention

[0008] Embodiments provide a cover window having improved adhesion to an adhesive layer, a display device including the cover window, and a method of manufacturing the cover window.

[0009] The cover window according to the embodiment may include: a base layer; and a sub-opaque layer disposed on the base layer, wherein the sub-opaque layer may include a plurality of additives having magnetic properties.

[0010] Multiple additives can include Fe, Al, FeO and Fe 2 O 3 At least one of .

[0011] The plurality of additives may have a core-shell structure.

[0012] The core-shell structure may include SiO 2 and BaSO 4 The core-shell structure may include a core of at least one of the following: and the core-shell structure may include a shell including aluminum.

[0013] The plurality of additives may be contained in the sub-opaque layer in an amount ranging from about 5 wt % to about 15 wt %.

[0014] A plurality of additives may be disposed adjacent to a surface of the sub-opaque layer.

[0015] The roughness of the surface of the sub-opaque layer may be in the range of about 0.4 micrometers to about 0.7 micrometers.

[0016] According to an embodiment, a display device may include: a display layer arranged on a substrate; and a cover window arranged on the display layer, wherein the cover window may include a base layer and a first sub-opaque layer arranged on the base layer, wherein the first sub-opaque layer may include a plurality of additives having magnetism.

[0017] Multiple additives can include Fe, Al, FeO and Fe 2 O 3 At least one of .

[0018] The plurality of additives may have a core-shell structure.

[0019] The core-shell structure may include SiO 2 and BaSO 4 The core-shell structure may include a core of at least one of the following: and the core-shell structure may include a shell including aluminum.

[0020] The plurality of additives may be included in the first sub-opaque layer in an amount ranging from about 5 wt % to about 15 wt %.

[0021] The plurality of additives may be arranged adjacent to a surface of the first sub-opaque layer.

[0022] The roughness of the surface of the first sub-opaque layer may be in the range of about 0.4 micrometers to about 0.7 micrometers.

[0023] The display device may further include an adhesive layer disposed between the display layer and the cover window.

[0024] A surface of the first sub-opaque layer may face the adhesive layer.

[0025] The cover window may further include a second sub-opaque layer disposed between the first sub-opaque layer and the base layer.

[0026] The method of manufacturing a cover window according to an embodiment may include: preparing a base layer; coating a material layer including an additive on the base layer; applying a magnetic force on the material layer; and curing the material layer to provide a first sub-opaque layer.

[0027] The additive may be magnetic.

[0028] When a magnetic force is applied, the additive can move to the surface of an adjacent material layer.

[0029] According to the embodiments, a cover window having an opaque layer having uniform surface roughness and a method of manufacturing the cover window can be provided.

[0030] Therefore, the adhesive strength of the opaque layer and the adhesive layer is uniformly provided, thereby providing a display device with improved reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and other aspects and features of the present disclosure will become more apparent by describing embodiments thereof in detail with reference to the accompanying drawings.

[0032] Figure 1 is a schematic perspective view of a display device according to an embodiment.

[0033] Figure 2 is an exploded perspective view of a display device according to an embodiment.

[0034] Figure 3 is a schematic cross-sectional view of a display device according to an embodiment.

[0035] Figure 4 is a schematic cross-sectional view of a cover window according to an embodiment.

[0036] Figure 5 and Figure 6 is a schematic diagram of a method for manufacturing a cover window according to an embodiment. DETAILED DESCRIPTION

[0037] Hereinafter, with reference to the accompanying drawings, various embodiments of the present disclosure will be described in detail so that those skilled in the art can easily implement the present disclosure.

[0038] The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0039] In order to clearly illustrate the present disclosure, parts irrelevant to the description may be omitted, and the same or similar components are assigned the same reference numerals throughout the specification.

[0040] The size and thickness of each component shown in the drawings are arbitrarily illustrated for convenience of explanation, and thus the present disclosure is not necessarily limited to the illustrated size and thickness.

[0041] In the drawings, the thickness is exaggerated to clearly indicate layers and regions.

[0042] Also, in the drawings, the thicknesses of some layers and regions are exaggerated for convenience of explanation.

[0043] In addition, when a part of a layer, film, region, or plate is referred to as being “on” or “over” another part, this includes not only the case where it is “directly on” the other part, but also the case where there is another part between them.

[0044] In contrast, when a part is referred to as being "directly on top of" another part, it means that there is no other part between them.

[0045] In addition, “above” or “on” a reference portion means disposed above or below the reference portion, and does not necessarily mean disposed “above” or “on” the reference portion in a direction opposite to gravity.

[0046] In addition, throughout the specification, when a part is referred to as “comprising” a certain element, it means that it may further include other elements, but does not exclude the other elements, unless there is a specific description contrary to this.

[0047] In addition, throughout the specification, when “on a plane” is mentioned, this means when the target portion is viewed from above, and when “in a cross section” is mentioned, this means when the cross section of the target portion is cut vertically and viewed from the side.

[0048] As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0049] In the specification and claims, for the purpose of its meaning and interpretation, the term "and / or" is intended to include any combination of the terms "and" and "or". For example, "A and / or B" may be understood to mean "A, B, or A and B". The terms "and" and "or" may be used in either a conjunctive or disjunctive sense and may be understood to be equivalent to "and / or".

[0050] In the specification and claims, for the purpose 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".

[0051] It will be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0052] The term "overlap" or "overlapping" means that a first object can be above or below or to one side of a second object, and vice versa. Additionally, the term "overlap" may include stacking, stacking, facing or facing, extending over, covering or partially covering, or any other suitable term as will be appreciated and understood by one of ordinary skill in the art.

[0053] The terms "facing" and "facing" mean that the first element may be directly or indirectly opposite to the second element. In the case where a third element is interposed between the first element and the second element, the first element and the second element may be understood to be indirectly opposite to each other although still facing each other.

[0054] When an element is described as “not overlapping” or “will not overlap” another element, this may include the elements being spaced apart, offset, or disposed beside each other, or any other suitable terminology as would be appreciated and understood by one of ordinary skill in the art.

[0055] The terms "comprises", "including", "includes" and / or "comprising", "having", "having" and / or "having" and variations thereof when used in this specification specify the presence of stated features, integers, steps, operations, elements, components and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0056] As used herein, "about" or "approximately" includes the stated value and means within an acceptable range of deviation for a particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0057] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It will be further understood that 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 will not be interpreted in an idealized or overly formal sense unless explicitly so defined herein.

[0058] It will be understood that in the specification, when an element (or region, layer, part, etc.) is referred to as being "on", "connected to" or "coupled to" another element, the element can be directly arranged on the other element, directly connected to or coupled to the other element, or intervening elements may be present between them.

[0059] It will be understood that the term "connected to" or "coupled to" may include physical or electrical connection or coupling. Figure 1 and Figure 2 Discuss the schematic structure of a display device.

[0060] Figure 1 is a schematic perspective view showing a usage state of the display device according to the embodiment, and Figure 2 is an exploded perspective view of a display device according to an embodiment.

[0061] refer to Figure 1 The display device 1000 according to the embodiment is a device for displaying a moving image or a still image, and can be used in a smart phone, a tablet personal computer, or a mobile phone. The display device 1000 can be used in various products, such as portable electronic devices (such as communication terminals, electronic notebooks, electronic books, portable multimedia players (PMPs), navigators, ultra mobile PCs (UMPCs)), as well as televisions, laptop computers, monitors, billboards, Internet of Things (IOT) devices, etc.

[0062] The display device 1000 according to the embodiment is mounted on a wearable device such as a smart watch, a watch phone, a glasses type display, and a head mounted display (HMD).

[0063] The display device 1000 according to an embodiment includes a dashboard of a car, a center information display (CID) placed on the central dashboard or instrument panel of the car, and a room mirror display (a display replacing a side-view mirror of the car), as well as a display that can be used as entertainment for the rear seat of the car and as a display placed on the back of the front seat.

[0064] For ease of explanation, Figure 1 The display device 1000 used as a smart phone is shown.

[0065] The display device 1000 may display an image in the third direction DR3 on a display surface parallel to each of the first direction DR1 and the second direction DR2 .

[0066] The display surface on which an image is displayed may correspond to the front surface of the display device 1000 and the front surface of the cover window CW.

[0067] Images can include static images as well as dynamic images.

[0068] In this embodiment, the front (or top) surface and the rear (or bottom) surface of each member are defined based on the direction in which the image is displayed.

[0069] The front surface and the rear surface are opposite to each other in the third direction DR3, and a normal direction of each of the front surface and the rear surface may be parallel to the third direction DR3.

[0070] A spacing distance between the front surface and the rear surface in the third direction DR3 may correspond to a thickness of the display panel in the third direction DR3.

[0071] The display device 1000 according to the embodiment may detect a user's input applied from the outside (refer to Figure 1 hand in the middle).

[0072] The user's input may include various types of external inputs such as a part of the user's body, light, heat, or pressure.

[0073] In an embodiment, the user's input is shown with the user's hand applied to the front.

[0074] However, the present disclosure is not limited thereto.

[0075] The user's input may be provided in various forms, and the display apparatus 1000 may also detect the user's input applied to the side or rear side of the display apparatus 1000 according to the structure of the display apparatus 1000 .

[0076] refer to Figure 1 and Figure 2 , the display device 1000 may include a cover window CW, a housing HM, a display panel DP, and an optical element ES.

[0077] In an embodiment, the cover window CW and the housing HM may be combined to form an appearance of the display device 1000 .

[0078] The cover window CW may include an insulating panel.

[0079] For example, the cover window CW may be made of glass, plastic, or a combination thereof.

[0080] The front of the cover window CW may define the front of the display device 1000 .

[0081] The transmission area TA may be an optically transparent area.

[0082] For example, the transmission area TA may be an area having a visible light transmittance of about 90% or more.

[0083] The blocking area BBA may define the shape of the transmission area TA.

[0084] The blocking area BBA is adjacent to the transmission area TA and may surround the transmission area TA.

[0085] The blocking area BBA may be an area having relatively low light transmittance compared with the transmission area TA.

[0086] The blocking area BBA may include an opaque material that blocks light.

[0087] The blocking area BBA may have a selectable color.

[0088] The blocking area BBA may be defined by an opaque layer (or ink layer) formed by inserting or coloring a transparent base layer defining the transmission area TA.

[0089] The display panel DP may include display pixels PX displaying an image and a driver 50 , and the display pixels PX are arranged in the display area DA and the assembly area EA.

[0090] The display panel DP may include a front surface including a display area DA and a non-display area PA.

[0091] In an embodiment, the display area DA and the element area EA are areas where an image is displayed, including pixels, and at the same time, a touch sensor may be arranged in a third direction DR3 of the pixels, which can be an area for detecting an external input.

[0092] The transmission area TA of the cover window CW may at least partially overlap the display area DA and the assembly area EA of the display panel DP.

[0093] For example, the transmission area TA may overlap the front surfaces of the display area DA and the assembly area EA, or may overlap at least a portion of the display area DA and the assembly area EA.

[0094] Therefore, the user can view an image through the transmissive area TA or provide an external input based on the image.

[0095] However, the present disclosure is not limited thereto.

[0096] For example, an area where an image is displayed and an area where an external input is detected may be separated from each other.

[0097] The non-display area PA of the display panel DP may at least partially overlap the blocking area BBA of the cover window CW.

[0098] The non-display area PA may be an area covered by the blocking area BBA.

[0099] The non-display area PA is adjacent to the display area DA and may surround the display area DA.

[0100] An image is not displayed in the non-display area PA, and a driving circuit or driving wiring for driving the display area DA may be arranged.

[0101] The non-display area PA may include a first non-display area PA1 disposed outside the display area DA and a second non-display area PA2 including the driver 50 , the connection wiring, and the bending area.

[0102] exist Figure 2 In the embodiment of FIG. 5 , the first non-display area PA1 is arranged on three sides of the display area DA, and the second non-display area PA2 is arranged on the remaining side of the display area DA.

[0103] A portion of the non-display area PA of the display panel DP may be bent.

[0104] At this time, a portion of the non-display area PA is directed toward the rear of the display device 1000, so that the blocking area BBA visible in front of the display device 1000 can be reduced, and Figure 2 In the embodiment, the second non-display area PA2 may be bent and placed on the rear surface of the display area DA and assembled.

[0105] For example, the assembly area EA of the display panel DP may include a first assembly area EA1 and a second assembly area EA2.

[0106] The first and second assembly areas EA1 and EA2 may be at least partially surrounded by the display area DA.

[0107] The first assembly area EA1 and the second assembly area EA2 are illustrated as being spaced apart from each other, but are not limited thereto and may be at least partially connected.

[0108] The first and second component areas EA1 and EA2 may be areas where optical elements ES (hereinafter also referred to as components) using infrared rays, visible light, or sound are arranged.

[0109] The display area DA (hereinafter also referred to as the main display area) and the component area EA are formed with multiple light emitting diodes and multiple pixel circuit units (or pixel circuit parts), and the multiple pixel circuit units generate light emitting current and send the light emitting current to each of the multiple light emitting diodes.

[0110] Here, one light emitting diode and one pixel circuit portion are referred to as a display pixel PX.

[0111] One pixel circuit unit and one light emitting diode may be formed in the display area DA and the assembly area EA in a one-to-one ratio.

[0112] The first assembly area EA1 may include a permeable portion through which light and / or sound can pass, and a display layer including a plurality of pixels.

[0113] The transmissive portion is disposed between adjacent pixels and is composed of a layer through which light and / or sound can pass.

[0114] The transmission portion may be disposed between adjacent pixels, and according to an embodiment, a layer that does not transmit light such as a light blocking member may overlap the first component area EA1.

[0115] The number of pixels per unit area (hereinafter referred to as resolution) of pixels contained in the display area DA (hereinafter referred to as normal pixels) and the number of pixels per unit area of ​​pixels contained in the first component area EA1 (hereinafter referred to as first component pixels) may be the same.

[0116] The second component area EA2 may include an area composed of a transparent layer to allow light to pass through (hereinafter also referred to as a light-transmitting area), and the light-transmitting area does not have a conductive layer or a semiconductor layer and may include a light-shielding material, and the layer (for example, a pixel defining layer and / or a light-shielding member) may have a structure that does not block light by including an opening that overlaps with a position corresponding to the second component area EA2.

[0117] The number of pixels per unit area of ​​pixels included in the second component area EA2 (hereinafter also referred to as second component pixels) may be smaller than the number of pixels per unit area of ​​normal pixels included in the display area DA.

[0118] As a result, the resolution of the second component pixels may be lower than the resolution of the normal pixels.

[0119] The driver 50 may be located on the bent portion or on one side of the bent portion in the second non-display area PA2.

[0120] The driver 50 may be provided in the form of a chip.

[0121] The driver 50 is electrically connected to the display area DA and the assembly area EA, and can transmit electric signals to pixels in the display area DA and the assembly area EA.

[0122] For example, the driver 50 may provide data signals to display pixels PX arranged or disposed in the display area DA.

[0123] By way of example, the driver 50 may include a touch driving circuit and may be electrically connected to the touch sensors arranged in the display area DA and / or the assembly area EA.

[0124] The driver 50 may include various circuits other than the above-described circuits, or may be designed to provide various electrical signals to the display area DA.

[0125] The display device 1000 may have a pad portion disposed at an end of the second non-display area PA2, and the pad portion can be electrically connected to a flexible printed circuit board (FPCB) that may include a driving chip.

[0126] Here, the driving chip disposed on the flexible printed circuit board may include various driving circuits for driving the display device 1000 or a connector for power supply purposes.

[0127] According to an embodiment, a rigid printed circuit board (PCB) may be used instead of a flexible printed circuit board. The optical element ES may be disposed under the display panel DP.

[0128] The optical element ES may include a first optical element ES1 overlapping the first component area EA1 and a second optical element ES2 overlapping the second component area EA2.

[0129] The first optical element ES1 may use infrared rays, and in this case, a layer that does not transmit light such as a light shielding member may overlap the first composition area EA1.

[0130] The first optical element ES1 may be an electronic element using light or sound.

[0131] For example, the first optical element ES1 may be a sensor that receives and uses light, such as an infrared sensor, a sensor that outputs and detects light or sound to measure distance or recognize fingerprints, a small lamp that outputs light, or a speaker that outputs sound.

[0132] Of course, in the case of an electronic component using light, light of various wavelength bands such as visible light, infrared light, and ultraviolet light can be used.

[0133] The second optical element ES2 is at least one of a camera, an IR camera, a dot projector, an IR illuminator, and a time-of-flight sensor.

[0134] The housing HM may be combined with the cover window CW.

[0135] A cover window CW may be placed on the front face of the housing HM.

[0136] The housing HM may be combined with the cover window CW to provide an optional accommodation space. The display panel DP and the optical element ES may be accommodated in the optional accommodation space provided between the housing HM and the cover window CW.

[0137] The housing HM may include a material having relatively high rigidity.

[0138] For example, the housing HM may include a plurality of frames and / or plates made of glass, plastic, or metal, or a combination thereof.

[0139] The housing HM can stably protect components of the display device 1000 accommodated in the inner space from external impact.

[0140] In the following, reference will be made to Figure 3 and Figure 4 A cover window and a display device including the same according to an embodiment are described. Figure 3 is a schematic cross-sectional view of a display device according to an embodiment, and Figure 4 is a schematic cross-sectional view of a cover window according to an embodiment.

[0141] refer to Figure 3, the display panel according to the embodiment may include a substrate SUB and a display layer DL disposed on the substrate SUB.

[0142] As described above, the display layer DL may include a plurality of light emitting diodes and a plurality of pixel circuit units generating and transmitting the light emitting current to each of the plurality of light emitting diodes.

[0143] The cover window CW may be disposed on the top of the display layer DL.

[0144] The cover window CW can protect the top surface of the display layer DL.

[0145] The cover window CW may include a base layer CWb and an opaque layer CWa.

[0146] In an embodiment, the base layer CWb may be made of a transparent material.

[0147] At this time, the base layer CWb may include glass, a transparent synthetic resin, or the like.

[0148] The base layer CWb may include at least one layer.

[0149] The opaque layer CWa may be disposed at an edge of the base layer CWb.

[0150] The opaque layer CWa is capable of blocking light.

[0151] The opaque layer CWa may include a pattern that can be displayed to the user without displaying an image.

[0152] The opaque layer CWa can be defined Figure 1 The blocking area BBA of the cover window CW described in .

[0153] An adhesive layer AD may be located between the cover window CW and the display layer DL.

[0154] The cover window CW may be coupled or connected to the display layer DL through an adhesive layer AD.

[0155] The adhesive layer AD may be a pressure sensitive adhesive (PSA), an optically clear adhesive (OCA), or a glue serving as an adhesive member.

[0156] Briefly describing the stack structure of the display panel, the display panel may include a display layer DL and a touch sensing unit (not shown) disposed on the display layer DL.

[0157] The display layer DL may include a driving element layer, a light emitting device layer, and an encapsulation layer disposed on a substrate SUB.

[0158] The substrate SUB may be a base substrate or a base member.

[0159] The substrate SUB may be a flexible substrate including a polymer resin such as polyimide, polyamide, or polyethylene terephthalate.

[0160] The driving element layer may be disposed on the substrate SUB.

[0161] The driving element layer may include transistors and capacitors constituting a pixel circuit unit that outputs a driving current to the light emitting device.

[0162] The driving element layer may include gate lines, data lines, power lines, gate control lines, fan-out lines connecting the display driver and the data lines, leads connecting the display driver and the display pads, and the like.

[0163] The driving element layer may include transistors and capacitors constituting a gate driver and a gate control line.

[0164] The driving element layer may include a conductive layer, a semiconductor layer, and an insulating layer, and may form and insulate a transistor, a capacitor, and a signal line by a combination of them.

[0165] The light emitting device layer may be disposed on the driving element layer, and may include light emitting devices and corresponding light emitting regions.

[0166] The light emitting device layer may include a pixel defining layer having an opening defining a light emitting area.

[0167] The encapsulation layer (also referred to as a thin film encapsulation layer) may cover the top and side surfaces of the light emitting device layer and prevent moisture or oxygen from penetrating into the light emitting device layer from the outside.

[0168] The encapsulation layer may include one or more inorganic layers and one or more organic layers.

[0169] The touch sensing unit may be disposed on the encapsulation layer, and may include a sensing electrode.

[0170] The sensing electrodes may sense a user's touch using a mutual capacitance method and / or a self capacitance method.

[0171] In the following, we will combine Figure 3 and Figure 4 The cover window according to the embodiment is described in more detail.

[0172] As described above, the cover window CW according to the embodiment may include the base layer CWb and the opaque layer CWa disposed on the base layer CWb.

[0173] The opaque layer CWa may be disposed between the base layer CWb and the display layer DL.

[0174] The opaque layer CWa may be adhered to the adhesive layer AD so as to be coupled or connected with the display layer DL.

[0175] refer to Figure 4 , the opaque layer CWa according to the embodiment may include a first sub-opaque layer CWa1 and a second sub-opaque layer CWa3 .

[0176] The first sub-opaque layer CWa1 may be in contact with the adhesive layer AD, and may be coupled or connected to the adhesive layer AD.

[0177] The second sub-opaque layer CWa3 may be disposed between the first sub-opaque layer CWa1 and the base layer CWb.

[0178] The first sub-opaque layer CWa1 according to the embodiment may include a plurality of additives CWa2 .

[0179] Most of the plurality of additives CWa2 may be disposed on one side of the first sub-opaque layer CWa1.

[0180] A plurality of additives CWa2 may be disposed on a side of the first sub-opaque layer CWa1 facing the adhesive layer AD.

[0181] The surface of the first sub-opaque layer CWa1 may have irregularities due to the plurality of additives CWa2 .

[0182] The surface of the first sub-opaque layer CWa1 may have a selectable roughness, and by doing so, the adhesive force between the first sub-opaque layer CWa1 and the adhesive layer AD may be enhanced.

[0183] The plurality of additives CWa2 may be magnetic materials, and may include, for example, Fe, Al, FeO, and Fe 2 O 3 At least one of .

[0184] By way of example, the plurality of additives CWa2 may have a core-shell structure.

[0185] The core may include SiO 2 and BaSO 4 At least one of the above, and the shell may provide magnetic properties in the form of coating the core with aluminum (Al).

[0186] The diameter of the additive CWa2 may be several nanometers to several micrometers, for example, in the range of about 1 micrometer to about 10 micrometers.

[0187] A plurality of additives CWa2 may be included in the first sub-opaque layer CWa1 in an amount ranging from about 5wt% to about 15wt%, for example, ranging from about 8wt% to about 12wt%, for example, ranging from about 9wt% to about 11wt%, or for example, about 10wt%.

[0188] As the content of the additive CWa2 included in the first sub-opaque layer CWa1 increases, the roughness of the surface of the first sub-opaque layer CWa1 may increase.

[0189] In the case where the additive CWa2 is included at less than about 5 wt %, it may be difficult to provide a selectable roughness of the first sub-opaque layer CWa1 for stable bonding with the adhesive layer AD.

[0190] If the additive CWa2 is included in an amount exceeding about 15 wt %, dispersibility and agitation in the first sub-opaque layer CWa1 are reduced, and appearance defects such as bubbles or stains may occur.

[0191] The roughness of the surface of the first sub-opaque layer CWa1 facing the adhesive layer AD may be in the range of about 0.4 micrometers to about 0.7 micrometers, for example, in the range of about 0.46 micrometers to about 0.6 micrometers.

[0192] For example, the adhesive force of the surface of the first sub-opaque layer CWa1 facing the adhesive layer AD may be in the range of about 490N to about 540N.

[0193] A plurality of additives CWa2 are uniformly arranged on the surface of the first sub-opaque layer CWa1 , thereby providing the roughness as described above.

[0194] Accordingly, the adhesive layer AD according to the embodiment may penetrate into gaps between the plurality of additives CWa2 included in the first sub-opaque layer CWa1 to enhance adhesive force.

[0195] The first sub-opaque layer CWa1 may further include a resin in a range of about 30 wt % to about 50 wt %, a pigment in a range of about 5 wt % to about 50 wt %, and a solvent in a range of about 20 wt % to about 30 wt %, in addition to the above-mentioned additive CWa2 .

[0196] In the following, reference will be made to Figure 5 and Figure 6 A method of manufacturing a cover window according to an embodiment is described.

[0197] Figure 5 and Figure 6 is a diagram of a method of manufacturing a cover window according to an embodiment.

[0198] Description of the same contents as those described above will be omitted.

[0199] First, refer to Figure 5 , after forming a second sub-opaque layer (not shown) on the base layer CWb, the first material layer ML1 is formed on the second sub-opaque layer to form a first sub-opaque layer.

[0200] The first material forming the first material layer ML1 may include resin ranging from about 30 wt % to about 50 wt %, pigment ranging from about 5 wt % to about 50 wt %, solvent ranging from about 20 wt % to about 30 wt %, and additive ranging from about 5 wt % to about 15 wt %.

[0201] After the first material layer ML1 is coated on the second sub-opaque layer (not shown), the magnetic force MP is provided to the first material layer ML1.

[0202] like Figure 6 As shown in FIG. 5 , when a magnetic force is provided to the first material layer ML1 , the additive CWa2 dispersed in the first material and having magnetic properties may move to the surface of the first material layer ML1 .

[0203] By performing a thermal curing process HP on the first material layer ML1, Figure 4 As shown in , the first sub-opaque layer CWa1 in which a plurality of additives CWa2 are combined with an adhesive layer can be formed.

[0204] The plurality of additives CWa2 are uniformly arranged on the surface of the first sub-opaque layer CWa1 , thereby providing the surface roughness as described above.

[0205] Accordingly, the adhesive layer AD according to the embodiment may penetrate into gaps between the plurality of additives CWa2 included in the first sub-opaque layer CWa1 to enhance adhesive force.

[0206] Referring to Table 1 below, it is confirmed that as the content of the additive included in the first sub-opaque layer increases, the roughness and adhesive force of the surface of the first sub-opaque layer increase.

[0207]

Table 1

[0208] Content of additives 0wt% 5wt% 10wt% Roughness(μm) 0.233 0.458 0.602 Adhesion force(N) 456.3 498.2 526.8

[0209] The cover window according to the embodiment may include an additive uniformly arranged on the surface of the opaque layer by a magnetic force, and by doing so, adhesion with the adhesive layer is improved, thereby providing a display device with improved reliability.

[0210] Although the embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto, and various modifications and improvements made by those skilled in the art using the concepts of the present disclosure and defined in the appended claims are possible.

Claims

1. A cover window, comprising: Base layer; as well as a sub-opaque layer disposed on the base layer, and The sub-opaque layer includes a plurality of additives having magnetic properties.

2. The cover window according to claim 1, wherein: The plurality of additives include at least one of Fe, Al, FeO and Fe2O3.

3. The cover window according to claim 1, wherein: The plurality of additives have a core-shell structure.

4. The cover window according to claim 3, wherein: The core-shell structure includes a core comprising at least one of SiO2 and BaSO4, and The core-shell structure includes a shell comprising aluminum.

5. The cover window according to claim 1, wherein: The plurality of additives are contained in the sub-opaque layer in an amount ranging from 5 wt % to 15 wt %.

6. The cover window according to claim 1, wherein: The plurality of additives are disposed adjacent to a surface of the sub-opaque layer.

7. The cover window according to claim 1, wherein: The surface of the sub-opaque layer has a roughness ranging from 0.4 micrometers to 0.7 micrometers.

8. A display device, comprising: A display layer is arranged on the substrate; as well as a cover window arranged on the display layer, Wherein, the cover window comprises: Base layer; and a first sub-opaque layer disposed on the base layer, and The first sub-opaque layer includes a plurality of additives having magnetic properties.

9. The display device according to claim 8, wherein: The plurality of additives include at least one of Fe, Al, FeO and Fe2O3.

10. The display device according to claim 8, further comprising: An adhesive layer is disposed between the display layer and the cover window, wherein the plurality of additives are disposed adjacent to a surface of the first sub-opaque layer, and the surface of the first sub-opaque layer faces the adhesive layer.

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