Display device and electronic device including the same

Abstract

The present disclosure relates to display devices and electronic devices. A display device includes a display panel having light emitting elements and a cover window disposed on the display panel. The cover window includes a flat portion and a curved portion curved from an edge of the flat portion. Further, the cover window includes a base layer and an anti-reflection layer disposed on the base layer, wherein the anti-reflection layer includes a high refractive index layer and a low refractive index layer disposed on the high refractive index layer. When light is received on the cover window, the reflectance of the anti-reflection layer decreases as the wavelength of the light increases from about 380 nm to about 450 nm and from about 500 nm to about 580 nm.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2025-0007872, filed on January 20, 2025, and Korean Patent Application No. 10-2025-0065611, filed on May 20, 2025, the disclosures of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to display devices and electronic devices. More specifically, this disclosure relates to display devices with improved reliability and electronic devices including such display devices. Background Technology

[0004] Various electronic devices, such as televisions, mobile phones, tablet computers, and gaming devices, are a focus of ongoing research and development. Electronic devices can include display devices that generate images and sense input. Display devices can include multiple layers with different refractive indices to improve display quality. Layers with lower refractive indices reduce reflectivity and thus improve display quality; however, layers with lower refractive indices exhibit poor rigidity and lower scratch resistance.

[0005] Therefore, there is a need to provide display devices with high display quality without excessively compromising rigidity and scratch resistance. Summary of the Invention

[0006] This disclosure provides a display device including a cover window with improved display quality. This disclosure also provides an electronic device including the intended display device.

[0007] In some embodiments, the display device includes a display panel having light-emitting elements and a cover window disposed on the display panel. The cover window includes a flat portion and a curved portion curving from the edge of the flat portion. Furthermore, the cover window includes a base layer and an anti-reflective layer disposed on the base layer. The anti-reflective layer of the cover window includes a high-refractive-index layer and a low-refractive-index layer disposed on the high-refractive-index layer. When light is received on the cover window, the reflectivity of the anti-reflective layer decreases as the wavelength of the light increases from about 380 nm to about 450 nm and from about 500 nm to about 580 nm. In some examples, the reflectivity of the anti-reflective layer decreases as the wavelength of the light increases within the range of wavelengths greater than or equal to about 380 nm and less than or equal to about 450 nm, and greater than or equal to about 500 nm and less than or equal to about 580 nm.

[0008] In some embodiments, the display device includes a display panel comprising a light-emitting element and a cover window disposed on the display panel. The cover window includes a base layer and an anti-reflective layer disposed on the base layer. The anti-reflective layer includes a first refractive index layer, a second refractive index layer disposed below the first refractive index layer, and a third refractive index layer disposed below the second refractive index layer. The first, second, and third refractive index layers have different refractive indices. The refractive index of the second refractive index layer is greater than the refractive indices of the first and third refractive index layers. The first thickness of the first refractive index layer is greater than the second thickness of the second refractive index layer, and the second thickness of the second refractive index layer is greater than the third thickness of the third refractive index layer.

[0009] In some embodiments, the electronic device includes a display device defining a module region and an electronic module configured to correspond to the module region. The display device includes a display panel comprising a light-emitting element and a cover window disposed on the display panel, the cover window including a flat portion and a curved portion curving from the edge of the flat portion. The cover window includes a base layer and an anti-reflective layer disposed on the base layer, the anti-reflective layer including a high-refractive-index layer and a low-refractive-index layer disposed on the high-refractive-index layer. When light is received on the cover window, the reflectivity of the anti-reflective layer decreases as the wavelength of light increases from about 380 nm to about 450 nm and from about 500 nm to about 580 nm. In some examples, the reflectivity of the anti-reflective layer decreases as the wavelength of light increases within the range of wavelengths greater than or equal to about 380 nm and less than or equal to about 450 nm, and greater than or equal to about 500 nm and less than or equal to about 580 nm.

[0010] According to the above embodiment, the thicknesses of the flat and curved portions of the cover window are different from each other. Nevertheless, even when the curved portion is thinner than the flat portion, the tri-color values ​​remain constant in both the flat and curved portions, and thus the color difference between the flat and curved portions is minimized, thereby improving the display quality of the cover window. Attached Figure Description

[0011] Figure 1 This is a perspective view of an electronic device according to an embodiment of the present disclosure; Figure 2 yes Figure 1 An exploded perspective view of the electronic device; Figure 3 It is along Figure 2 The line I-I' intercepted Figure 1 A cross-sectional view of the display device of an electronic device; Figure 4 This is a cross-sectional view of a portion of a display panel according to an embodiment of the present disclosure; Figure 5A It is along Figure 2The line II-II' intercepted Figure 1 A cross-sectional view of the display device of an electronic device; Figure 5B yes Figure 5A An enlarged view of area AA' of the display device; Figures 6A to 6C This is a diagram illustrating Embodiment 2 of Table 1; Figures 7A to 7C The figure shows Embodiment 1 of Table 1; and Figures 8A to 8C This is a diagram illustrating Example 3 of Table 1. Detailed Implementation

[0012] Although specific embodiments are shown in the accompanying drawings and described in detail below, this disclosure can be modified in various ways and implemented in many different forms. Therefore, it will be understood that this disclosure is not limited to the specific form disclosed and should be construed as including all modifications, equivalents, or substitutions within the spirit and scope of this disclosure.

[0013] In this disclosure, it will be understood that when a first element (or region, layer, or portion) is referred to as being “on,” “connected to,” or “linked to” the second element, the first element may be directly on, directly connected to, or directly linked to the second element, or an intermediary element may be present and disposed between the first and second elements.

[0014] Unless otherwise stated, the same reference numerals denote the same elements throughout this disclosure. In the drawings, for the purpose of effectively describing the technical content, the thickness, proportions, and dimensions of the components may be exaggerated.

[0015] As used herein, the term “and / or” can include any and all combinations of one or more of the associated listed items.

[0016] Furthermore, the terms “about,” “generally,” and “substantially” are intended to mean that slight deviations from absolute values ​​are included within the scope of the so-called modified terminology, and those skilled in the art will understand that they mean that slight deviations from absolute values ​​are included within the scope of the so-called modified terminology. In terms of the degree to which a value (including values ​​representing the endpoints of a range) described herein is “about” a certain value, such a value can deviate from the indicated amount by as much as 5%, 10%, 20%, and 30%. Thus, for example, if the wavelength is about 380 nm, it can be as low as 361 nm or as high as 399 nm.

[0017] 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 used only to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” are intended to also include the plural forms.

[0018] For ease of description, spatial relative terms such as “below,” “lower,” “above,” “upper”, etc., may be used in this document to describe the relationship between one element or feature and another element or feature as shown in the accompanying drawings.

[0019] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the field to which this disclosure is applied. It will also be understood that terms (such as those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0020] It will also be understood that, when used in this specification, the terms “comprising” and / or “including” specify the presence of the stated features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or groups thereof.

[0021] In the following description, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0022] Figure 1 This is a perspective view of an electronic device according to an embodiment of the present disclosure. Figure 2 yes Figure 1 An exploded three-dimensional view of the electronic device.

[0023] Figure 1 The electronic device ED shown can be a device activated in response to an electrical signal. For example, the electronic device ED can be a personal computer, a laptop computer, a personal digital assistant, a gaming unit, a mobile electronic device, a television set, a monitor, an outdoor billboard, a car navigation unit, or a wearable unit. However, this disclosure is not limited to or restricted by this. Figure 1 A smartphone is shown as a representative example of an electronic device (ED).

[0024] A display area can be defined in an electronic device (ED). The electronic device (ED) can display images and receive external input through the display area. The display area of ​​the electronic device (ED) may include a main display area DA-M and a first sub-display area DA-S1, a second sub-display area DA-S2, a third sub-display area DA-S3, and a fourth sub-display area DA-S4.

[0025] The main display area DA-M may be substantially parallel to the plane defined by the first direction DR1 and the second direction DR2; however, this disclosure should not be limited thereto or thereby restricted. The main display area DA-M may have a concave or convex shape relative to the plane defined by the first direction DR1 and the second direction DR2.

[0026] The main display area DA-M can display images on a third direction DR3 orthogonal to each of the first direction DR1 and the second direction DR2. The third direction DR3 can be defined as the thickness direction of the electronic device ED. The front (or upper) and rear (or lower) surfaces of each component of the electronic device ED can be opposite each other on the third direction DR3.

[0027] In this disclosure, the phrase "when viewed in a plane" can refer to the state of observation in a third direction DR3. In this disclosure, the phrase "in a cross-section" can refer to the state of observation in a first direction DR1 or a second direction DR2. The directions indicated by the first direction DR1, the second direction DR2, and the third direction DR3 can be relative to each other, and therefore, a direction indicated by any one of the first direction DR1, the second direction DR2, and the third direction DR3 can be used in relation to the other directions.

[0028] The main display area DA-M may have a rectangular shape, having a short side extending in the first direction DR1 and a long side extending in the second direction DR2. However, the shape of the main display area DA-M should not be limited to a rectangular shape, and when viewed in a plane, the main display area DA-M may have various shapes such as circular shapes, polygonal shapes, etc.

[0029] The main display area DA-M can include, for example Figure 1 and Figure 2 The sub-region MH is shown below. However, this is merely an example, and there are no particular restrictions on the arrangement of the sub-region MH. Furthermore, although... Figure 1 A sub-region MH is shown, but in some exemplary configurations, the sub-region MH can be set to multiple sub-region MHs.

[0030] Such as Figure 2The various electronic modules ELM shown can be arranged to correspond to sub-regions MH. As an example, an electronic module ELM may include at least one of a camera, a speaker, a light sensor, and a thermal sensor. An electronic device ED may include an electronic module ELM that uses visible light passing through the sub-region MH to capture an image of an external object, or uses infrared light to determine if an external object is approaching. An electronic module ELM may include multiple components, but it is not limited to this arrangement.

[0031] Each of the first sub-display area DA-S1, the second sub-display area DA-S2, the third sub-display area DA-S3, and the fourth sub-display area DA-S4 can be curved from the main display area DA-M. Each of the first sub-display area DA-S1, the second sub-display area DA-S2, the third sub-display area DA-S3, and the fourth sub-display area DA-S4 can be curved to have curvature and may include a curved surface. The curvature of the first sub-display area DA-S1, the second sub-display area DA-S2, the third sub-display area DA-S3, and the fourth sub-display area DA-S4 can be the same as each other, or two or more of the sub-display areas can have curvatures that are different from each other.

[0032] The main display area DA-M and the first sub-display areas DA-S1, DA-S2, DA-S3, and DA-S4 can be arranged adjacent to each other and together form a continuous display area. The first sub-display area DA-S1 and the third sub-display area DA-S3 can extend from the long side of the main display area DA-M parallel to the second direction DR2, and the second sub-display area DA-S2 and the fourth sub-display area DA-S4 can extend from the short side of the main display area DA-M parallel to the first direction DR1.

[0033] The first sub-display area DA-S1 and the third sub-display area DA-S3 can extend along the second direction DR2 and can be spaced apart from each other along the first direction DR1, and the main display area DA-M can be located between the first sub-display area DA-S1 and the third sub-display area DA-S3. The second sub-display area DA-S2 and the fourth sub-display area DA-S4 can extend along the first direction DR1 and can be spaced apart from each other along the second direction DR2, and the main display area DA-M can be located between the second sub-display area DA-S2 and the fourth sub-display area DA-S4.

[0034] Figure 1Four sub-display areas DA-S1, DA-S2, DA-S3, and DA-S4, extending from the four sides of the main display area DA-M, are shown as representative examples; however, this disclosure is not limited thereto. According to embodiments, the display area of ​​the electronic device ED may include sub-display areas that are curved and extend from at least one of the four sides of the main display area DA-M. As an example, the electronic device ED may include only three or fewer of the four sub-display areas DA-S1, DA-S2, DA-S3, and DA-S4.

[0035] The electronic device ED may include a first display corner portion C1, a second display corner portion C2, a third display corner portion C3, and a fourth display corner portion C4 disposed between a first sub-display area DA-S1, a second sub-display area DA-S2, a third sub-display area DA-S3, and a fourth sub-display area DA-S4. The first sub-display area DA-S1, the second sub-display area DA-S2, the third sub-display area DA-S3, and the fourth sub-display area DA-S4 may be connected to the first display corner portion C1, the second display corner portion C2, the third display corner portion C3, and the fourth display corner portion C4 to surround the main display area DA-M.

[0036] A first display corner portion C1 can be disposed between a first sub-display area DA-S1 and a second sub-display area DA-S2, and can connect the first sub-display areas DA-S1 and DA-S2, which extend in intersecting directions. Furthermore, the first display corner portion C1 can have curvature. A second display corner portion C2 can be disposed between a second sub-display area DA-S2 and a third sub-display area DA-S3, and can connect the second sub-display areas DA-S2 and DA-S3, which extend in intersecting directions. Furthermore, the second display corner portion C2 can have curvature. A third display corner portion C3 can be disposed between a third sub-display area DA-S3 and a fourth sub-display area DA-S4, and can connect the third sub-display areas DA-S3 and DA-S4, which extend in intersecting directions. Furthermore, the third display corner portion C3 can have curvature. The fourth display corner portion C4 can be disposed between the fourth sub-display area DA-S4 and the first sub-display area DA-S1, and can connect the fourth sub-display area DA-S4 and the first sub-display area DA-S1, which extend in intersecting directions respectively. Furthermore, the fourth display corner portion C4 can have curvature.

[0037] The first display corner portion C1, the second display corner portion C2, the third display corner portion C3, and the fourth display corner portion C4 can each correspond to a corner of the electronic device ED. Since each of the first display corner portion C1, the second display corner portion C2, the third display corner portion C3, and the fourth display corner portion C4 is curved, the corner of the electronic device ED can have a rounded shape instead of a sharp corner.

[0038] refer to Figure 2 The electronic device ED may include a display device DD and an electronic module ELM. The display device DD may include a display module DM and a cover window CW disposed on the display module DM. Furthermore, the electronic device ED may also include a housing HAU that houses the display module DM. A module region DM-MH may be defined within the display device DD, and the electronic module ELM may be arranged corresponding to the module region DM-MH. For example, the electronic module ELM may be positioned relative to the housing HAU such that when the display device DD is assembled into the housing HAU, the electronic module ELM is aligned with the module region DM-MH.

[0039] exist Figure 1 and Figure 2 In the illustrated electronic device ED, a housing HAU can be attached to a cover window CW to define the appearance of the electronic device ED. The housing HAU can be positioned below the display module DM. The housing HAU can comprise a material with relatively high rigidity. As an example, the housing HAU can comprise multiple frames and / or plates formed of glass, plastic, or metal. The housing HAU provides a receiving space. The display module DM can be housed within this receiving space and can be protected by the housing HAU from external impacts.

[0040] The overlay window (CW) can be mounted on the display module (DM). The overlay window (CW) can be bonded to the display panel (DP) via lamination (see [link]). Figure 3 The cover window (CW) can cover the display module (DM) and protect it from external impacts and scratches.

[0041] Cover window CWs may include optically transparent insulating materials. As an example, a cover window CW may include a base film comprising glass or synthetic resin. Cover window CWs may have a single-layer or multi-layer structure. As an example, embodiments of a multi-layer cover window CW may include synthetic resin films attached to each other with an adhesive, or may include a glass film and a synthetic resin film attached to the glass film with an adhesive. Cover window CWs may also include functional layers disposed on the base film, such as an anti-fingerprint layer, a phase control layer, a hard coating, etc.

[0042] The cover window (CW) may include a transmission area, and the transmission area of ​​the cover window (CW) may correspond to... Figure 1The main display area DA-M is shown in the diagram. The transmissive area of ​​the cover window CW can transmit images provided by the display module DM, and the user can view the images from outside the electronic device ED. The cover window CW may include a main transmissive surface TA-M, as well as a first side transmissive surface TA-S1, a second side transmissive surface TA-S2, a third side transmissive surface TA-S3, and a fourth side transmissive surface TA-S4.

[0043] The main transmission surface TA-M can correspond to Figure 1 The main display area DA-M is shown. The main transmission surface TA-M may include a plane that is substantially parallel to the plane defined by the first direction DR1 and the second direction DR2.

[0044] Each of the first side transmission surface TA-S1, the second side transmission surface TA-S2, the third side transmission surface TA-S3, and the fourth side transmission surface TA-S4 can be bent from the main transmission surface TA-M to have a curvature. Therefore, each of the first side transmission surface TA-S1, the second side transmission surface TA-S2, the third side transmission surface TA-S3, and the fourth side transmission surface TA-S4 may include a curved surface extending from the main transmission surface TA-M. The first side transmission surface TA-S1, the second side transmission surface TA-S2, the third side transmission surface TA-S3, and the fourth side transmission surface TA-S4 can respectively correspond to... Figure 1 The first sub-display area DA-S1, the second sub-display area DA-S2, the third sub-display area DA-S3, and the fourth sub-display area DA-S4 are shown in the diagram.

[0045] The main transmission surface TA-M and the first side transmission surface TA-S1, the second side transmission surface TA-S2, the third side transmission surface TA-S3, and the fourth side transmission surface TA-S4 can be arranged adjacent to each other and together form a continuous transmission area. The first side transmission surface TA-S1 and the third side transmission surface TA-S3 can extend in the second direction DR2 and can be spaced apart from each other in the first direction DR1, and the main transmission surface TA-M can be disposed between the first side transmission surface TA-S1 and the third side transmission surface TA-S3. The second side transmission surface TA-S2 and the fourth side transmission surface TA-S4 can extend in the first direction DR1 and can be spaced apart from each other in the second direction DR2, and the main transmission surface TA-M can be disposed between the second side transmission surface TA-S2 and the fourth side transmission surface TA-S4.

[0046] The cover window CW may include a first window corner portion W-C1, a second window corner portion W-C2, a third window corner portion W-C3, and a fourth window corner portion W-C4 disposed between a first side transmission surface TA-S1, a second side transmission surface TA-S2, a third side transmission surface TA-S3, and a fourth side transmission surface TA-S4. The first window corner portion W-C1, the second window corner portion W-C2, the third window corner portion W-C3, and the fourth window corner portion W-C4 may substantially correspond to... Figure 1 The display device DD shown includes a first display corner portion C1, a second display corner portion C2, a third display corner portion C3, and a fourth display corner portion C4. A first side transmissive surface TA-S1, a second side transmissive surface TA-S2, a third side transmissive surface TA-S3, and a fourth side transmissive surface TA-S4 can be connected to the first window corner portion W-C1, the second window corner portion W-C2, the third window corner portion W-C3, and the fourth window corner portion W-C4 to surround the main transmissive surface TA-M.

[0047] The first window corner portion W-C1 can be connected to a first side transmission surface TA-S1 and a second side transmission surface TA-S2 extending in intersecting directions. The second window corner portion W-C2 can be connected to a second side transmission surface TA-S2 and a third side transmission surface TA-S3 extending in intersecting directions. The third window corner portion W-C3 can be connected to a third side transmission surface TA-S3 and a fourth side transmission surface TA-S4 extending in intersecting directions. The fourth window corner portion W-C4 can be connected to a fourth side transmission surface TA-S4 extending in intersecting directions and a first side transmission surface TA-S1. Each of the first window corner portions W-C1, second window corner portions W-C2, third window corner portions W-C3, and fourth window corner portions W-C4 can have curvature, such that the corners of the covering window CW are curved.

[0048] The first side transmission surface TA-S1 and the third side transmission surface TA-S3 can be bent with the same curvature. The second side transmission surface TA-S2 and the fourth side transmission surface TA-S4 can be bent with the same curvature. Each of the first side transmission surface TA-S1 and the third side transmission surface TA-S3 can have a curvature different from that of each of the second side transmission surface TA-S2 and the fourth side transmission surface TA-S4. Therefore, by connecting the first side transmission surface TA-S1 and the third side transmission surface TA-S3 extending in the second direction DR2 and defining the long side of the covering window CW, and the second side transmission surface TA-S2 and the fourth side transmission surface TA-S4 extending in the first direction DR1 and defining the short side of the covering window CW, each window corner portion W-C1, W-C2, W-C3 and W-C4 can be formed as a multi-curvature portion with different curvatures.

[0049] The display module DM can be activated in response to an electrical signal. For example... Figure 1 As shown, the activated display module DM can display images through the main display area DA-M of the electronic device ED. Furthermore, as... Figure 2 As shown, the display module DM may include an active area DM-AA, a peripheral area DM-NAA, and a module area DM-MH.

[0050] The active area DM-AA can be activated in response to an electrical signal. Pixel PX can be set within the active area DM-AA. Pixel PX can be included in... Figure 4 The transistor TR and the light-emitting element OLED are shown and described in more detail below. The peripheral region DM-NAA can be defined as being adjacent to at least one side of the active region DM-AA. The circuitry or lines driving the active region DM-AA can be arranged in the peripheral region DM-NAA.

[0051] Module area DM-MH can correspond to Figure 1 The sub-region MH is shown. For example, optical signals such as visible light or infrared light can pass through the module region DM-MH. The module region DM-MH can be confined within the effective region DM-AA. According to an embodiment, the module region DM-MH can be surrounded by the peripheral region DM-NAA, or it can be surrounded by both the effective region DM-AA and the peripheral region DM-NAA.

[0052] An electronic module (ELM) can be an electronic component that outputs or receives optical signals. An ELM may include a camera module and / or a proximity sensor. The camera module can capture images of external objects via the DM-MH module area.

[0053] Although not shown in the figures, in some embodiments, the display device DD may further include an optical layer disposed between the display module DM and the overlay window CW. The optical layer can be formed on the display module DM using a continuous process. The optical layer may include a polarizer or a color filter layer. As an example, the optical layer may include at least one of a retarder, a polarizer, a polarizing film, and a polarizing filter. According to embodiments, the optical layer may include a plurality of color filters arranged in a selected arrangement. As an example, the color filters may be arranged taking into account the emission color of the pixel PX. Furthermore, the optical layer may also include a black matrix disposed adjacent to the color filters.

[0054] Figure 3 It is along Figure 2 The cross-sectional view of the display device is taken by line I-I'. For ease of explanation, in... Figure 3 The middle part is omitted Figure 2 The housing HAU shown.

[0055] refer to Figure 3 The display module DM may include a display panel DP and an input sensing portion TP disposed on the display panel DP. The display panel DP may be configured to essentially generate an image.

[0056] The display panel DP may include a base substrate BS, a circuit element layer DP-CL, a display element layer DP-ED, and a packaging layer TFE stacked sequentially. According to some embodiments, separate components may also be disposed between two adjacent layers of the base substrate BS, circuit element layer DP-CL, display element layer DP-ED, and packaging layer TFE.

[0057] The base substrate BS can provide a foundation surface on which the circuit element layer DP-CL is disposed. The base substrate BS can be a flexible substrate that is bendable, foldable, or rollable. The base substrate BS can be a glass substrate, a metal substrate, or a polymer substrate; however, it is not limited to or restricted by these. According to some embodiments, the base substrate BS can be an inorganic layer, an organic layer, or a composite material layer.

[0058] The circuit element layer DP-CL can be disposed on the base substrate BS. The circuit element layer DP-CL may include an insulating layer, semiconductor patterns, conductive patterns, and signal lines. The display element layer DP-ED can be disposed on the circuit element layer DP-CL. The display element layer DP-ED may include, for example... Figure 4 The light-emitting element OLED is shown in the diagram and described in more detail below. In some examples, the light-emitting element OLED may include organic light-emitting materials, inorganic light-emitting materials, organic-inorganic light-emitting materials, quantum dots, or quantum rods. In some examples, the light-emitting element OLED may include micron-LEDs or nano-LEDs.

[0059] A TFE (Transmission Equipment) encapsulation layer can be disposed on the Display Element Layer (DP-ED). The TFE protects the DP-ED from moisture, oxygen, and impurities such as dust particles. The TFE may include at least one inorganic layer. As an example, the TFE may include an inorganic layer, an organic layer, and an inorganic layer stacked sequentially.

[0060] The input sensing portion TP can be disposed on the display panel DP. The input sensing portion TP can be directly disposed on the encapsulation layer TFE; however, this disclosure is not limited thereto. According to an embodiment, an adhesive member can be disposed between the input sensing portion TP and the display panel DP.

[0061] In this disclosure, the statement "a component is directly set / provided / formed on another component" means that no third component is placed between the one component and the other component. For example, when a component is "directly set / provided / formed" on another component, it means that the one component and the other component are "in contact" with each other.

[0062] Continue to refer to Figure 3 The input sensing section TP can sense external input, convert the sensed external input into a selected input signal, and provide the input signal to the display panel DP. As an example, the input sensing section TP can be a touch sensing section that senses touch events. The input sensing section TP can sense direct touch from the user, indirect touch from the user, direct touch from an object, or indirect touch from an object.

[0063] The input sensing portion TP can sense at least one of the location and intensity (pressure) of an externally applied touch event. The input sensing portion TP can have various structures or may include various materials and should not be particularly limited. As an example, the input sensing portion TP can sense external input using a capacitive method. The display panel DP can receive the input signal from the input sensing portion TP and can generate an image corresponding to the input signal.

[0064] The display device DD may further include an adhesive layer AP-C disposed between the display module DM and the cover window CW. The display module DM can be connected to the cover window CW via the adhesive layer AP-C. The adhesive layer AP-C may include a pressure-sensitive adhesive (PSA), an optically clear adhesive (OCA) film, or an optically clear adhesive resin (OCR) layer; however, this disclosure is not limited thereto. According to some embodiments, the adhesive layer AP-C may be omitted.

[0065] Figure 4 This is a cross-sectional view of a portion of a display panel according to an embodiment of the present disclosure. Figure 3 compared to, Figure 4 The configuration of the display panel DP is shown in more detail below. The previously referenced configuration will not be repeated in the following text. Figure 3 A detailed description of the components.

[0066] A display panel (DP) may include multiple pixels. Each pixel may include at least one transistor (TR) and a light-emitting element (OLED). Figure 4 The diagram shows an area of ​​a display panel (DP) where the transistor TR and the light-emitting element OLED are located for one of a plurality of pixels. (Reference) Figure 4 The display panel DP may include a base substrate BS, a circuit element layer DP-CL, a display element layer DP-ED, and a packaging layer TFE.

[0067] The base substrate BS provides a foundation surface on which the circuit element layer DP-CL is disposed. The base substrate BS may include a synthetic resin layer. The synthetic resin layer can be formed on a support substrate used in manufacturing the display panel DP, and conductive and insulating layers can be formed on the synthetic resin layer. The support substrate can then be removed, and the synthetic resin layer from which the support substrate has been removed can correspond to the base substrate BS.

[0068] One or more inorganic layers may be disposed on the upper surface of the base substrate BS. The inorganic layers may form barrier layers and / or buffer layers. Figure 4 The structure in which a buffer layer BFL is disposed on a base substrate BS is shown. The buffer layer BFL can increase the adhesion between the base substrate BS and the semiconductor pattern of the circuit element layer DP-CL.

[0069] The circuit element layer DP-CL can be disposed on the buffer layer BFL. The circuit element layer DP-CL may include at least one insulating layer and circuit elements. The circuit elements may include signal lines, pixel driving circuits, etc. The insulating layer, semiconductor layer, and conductive layer can be formed by a coating process or a deposition process. Then, the insulating layer, semiconductor layer, and conductive layer can be patterned by a photolithography process to form the circuit element layer DP-CL.

[0070] In this embodiment, the circuit element layer DP-CL may include a transistor TR, a connection signal line SCL, connection electrodes CNE1 and CNE2, and multiple insulating layers. The insulating layers may include a first insulating layer 10, a second insulating layer 20, a third insulating layer 30, a fourth insulating layer 40, a fifth insulating layer 50, and a sixth insulating layer 60 sequentially stacked on the buffer layer BFL. Each of the first insulating layer 10, the second insulating layer 20, the third insulating layer 30, the fourth insulating layer 40, the fifth insulating layer 50, and the sixth insulating layer 60 may include one of an inorganic layer and an organic layer.

[0071] The transistor TR may include a semiconductor pattern and a gate electrode Ga, the semiconductor pattern including a source region Sa, an active region Aa, and a drain region Da. The semiconductor pattern of the transistor TR may include polycrystalline silicon; however, it is not limited to or restricted by this. According to embodiments, the semiconductor pattern may include amorphous silicon or metal oxide.

[0072] Semiconductor patterns can include multiple regions that are distinct from each other based on conductivity. As an example, a semiconductor pattern can have electrical properties that vary depending on whether it is doped or whether the metal oxide is reduced. Regions of the semiconductor pattern with relatively high conductivity can be used as electrodes or signal lines and can correspond to the source region Sa and drain region Da of a transistor TR. Undoped or unreduced regions of the semiconductor pattern with relatively low conductivity can correspond to the active region Aa (or channel region) of the transistor TR.

[0073] The connection signal line SCL can be formed from a semiconductor pattern, and the connection signal line SCL, the source region Sa, the active region Aa, and the drain region Da of the transistor TR can be disposed on the same layer. According to an embodiment, when viewed in a plane, the connection signal line SCL can be electrically connected to the drain region Da of the transistor TR.

[0074] The first insulating layer 10 can cover the semiconductor pattern of the circuit element layer DP-CL. A gate electrode Ga can be disposed on the first insulating layer 10. When viewed in a plane, the gate electrode Ga can overlap with the active region Aa. The gate electrode Ga can be used as a mask in the process of doping the semiconductor pattern. An upper electrode UE can be disposed on the second insulating layer 20. The upper electrode UE can overlap with the gate electrode Ga.

[0075] The first connecting electrode CNE1 and the second connecting electrode CNE2 can be disposed between the transistor TR and the light-emitting element OLED, and the transistor TR can be electrically connected to the light-emitting element OLED. The first connecting electrode CNE1 can be disposed on the third insulating layer 30, and can be connected to the connecting signal line SCL via a contact hole CNT-1 defined by the first insulating layer 10, the second insulating layer 20, and the third insulating layer 30. The second connecting electrode CNE2 can be disposed on the fifth insulating layer 50, and can be connected to the first connecting electrode CNE1 via a contact hole CNT-2 defined by the fourth insulating layer 40 and the fifth insulating layer 50.

[0076] The display element layer DP-ED can be disposed on the circuit element layer DP-CL. The display element layer DP-ED may include a light-emitting element OLED and a pixel defining layer PDL. The light-emitting element OLED may include a first electrode AE, a second electrode CE, and an intermediate layer disposed between the first electrode AE ​​and the second electrode CE. The first electrode AE ​​and the second electrode CE may include a conductive material. The intermediate layer may include at least one organic layer, and according to this embodiment, the intermediate layer may include a hole control layer HCL, a light-emitting layer EML, and an electronic control layer ECL; however, it is not limited thereto. According to some embodiments, in addition to the hole control layer HCL, the light-emitting layer EML, and the electronic control layer ECL, the intermediate layer may include additional layers. Furthermore, in some embodiments, at least one of the hole control layer HCL, the light-emitting layer EML, and the electronic control layer ECL may be omitted. Moreover, it should be understood that these embodiments are not limiting.

[0077] A first electrode AE ​​and a pixel defining layer PDL can be disposed on a sixth insulating layer 60. The first electrode AE ​​can be connected to a second connecting electrode CNE2 via a contact hole CNT-3 defined through the sixth insulating layer 60. A light-emitting opening OP-PX can be defined through the pixel defining layer PDL to expose at least a portion of the first electrode AE, and the portion of the first electrode AE ​​exposed through the light-emitting opening OP-PX can correspond to a light-emitting region PXA. A non-light-emitting region NPXA can surround the light-emitting region PXA.

[0078] The hole control layer (HCL) and the electron control layer (ECL) can be commonly disposed in the emitting region (PXA) and the non-emitting region (NPXA). The emitting layer (EML) can be formed into a patterned shape corresponding to the emitting openings (OP-PX). The patterned emitting layer (EML) can be formed using a deposition apparatus.

[0079] Unlike the hole control layer (HCL) and electron control layer (ECL), which each have their own film shape, the emissive layer (EML) can be deposited in different ways. As an example, the hole control layer (HCL) and the electron control layer (ECL) can be commonly formed in each pixel using a mask called an aperture mask. Alternatively, an emissive layer (EML) can be formed differently in each pixel using a mask called a fine metal mask (FMM).

[0080] The encapsulation layer TFE may comprise multiple thin layers. The encapsulation layer TFE may comprise a first thin layer EN1, a second thin layer EN2, and a third thin layer EN3 stacked sequentially. Each of the first thin layer EN1, the second thin layer EN2, and the third thin layer EN3 may comprise one of an inorganic layer and an organic layer. The inorganic layer can protect the OLED light-emitting element from moisture and / or oxygen. The organic layer can protect the OLED light-emitting element from impurities such as dust particles. However, the configuration of the encapsulation layer TFE is not limited to this or thus restricted, as long as it protects the OLED light-emitting element and / or improves luminous efficiency.

[0081] Figure 5A It is along Figure 2 The cross-sectional view of the display device taken by line II-II'. Figure 5B yes Figure 5A A magnified view of region AA'. Region AA' can be a magnified area of ​​the first part PO1 of the anti-reflective layer RPL.

[0082] refer to Figure 5A The cover window CW may include a base layer BL, an anti-reflective layer RPL disposed on the base layer BL, and a functional layer FL disposed on the anti-reflective layer RPL. Although not shown in the figures, an adhesive layer may also be disposed between the anti-reflective layer RPL and the functional layer FL. The cover window CW according to this disclosure may include a flat portion FP and a curved portion BP that curves from the edge of the flat portion FP. The flat portion FP may correspond to... Figure 2 The main transmission surface TA-M shown is illustrated, and the curved portion BP can correspond to... Figure 2 The first side transmission surface TA-S1 is shown in the figure.

[0083] The base layer BL can provide a base surface on which the anti-reflective layer RPL is disposed. The base layer BL can include glass or a polymer film. As an example, the base layer BL can be a flexible polymer film. The base layer BL can include at least one of polyethylene terephthalate, polyimide, polyacrylate, polymethyl methacrylate, polycarbonate, polyethylene naphthalate, polyvinylidene chloride, polyvinylidene fluoride, polystyrene, and ethylene-vinyl alcohol copolymers; however, these materials are merely examples of possible materials, and the composition of the base layer BL is not limited thereto or thereby restricted.

[0084] The antireflective layer RPL may have a first portion PO1 corresponding to the flat portion FP and a second portion PO2 corresponding to the curved portion BP. The thickness of the first portion PO1 of the antireflective layer RPL may be a first thickness Th1, and the thickness of the second portion PO2 of the antireflective layer RPL may be a second thickness Th2. According to some embodiments, the first thickness Th1 may be different from the second thickness Th2. The first thickness Th1 may be greater than the second thickness Th2. The antireflective layer RPL may be formed by a deposition process. The difference between the first thickness Th1 and the second thickness Th2 may increase depending on the degree of curvature of the portion of the antireflective layer RPL corresponding to the curved portion BP. Specifically, as the portion of the antireflective layer RPL corresponding to the curved portion BP is curved to a greater extent, the difference between the first thickness Th1 and the second thickness Th2 may increase. Therefore, the reflectivity of the portion of the antireflective layer RPL corresponding to the curved portion BP relative to external light may be different from the reflectivity of the portion of the antireflective layer RPL corresponding to the flat portion FP relative to external light.

[0085] The cover window (CW) may also include an auxiliary layer (not shown) disposed between the base layer (BL) and the anti-reflective layer (RPL). The auxiliary layer (not shown) can increase the adhesion between the base layer (BL) and the anti-reflective layer (RPL) and can improve the mechanical properties of the cover window (CW), such as abrasion resistance. As an example, the auxiliary layer (not shown) may include silicon oxide.

[0086] The functional layer FL may comprise a polymer film. In some examples, the functional layer FL may comprise at least one of an antistatic agent, a hardening agent, and an antifingerprint agent. In one specific example, the functional layer FL may comprise perfluoropolyether (PFPE). Alternatively, in some examples, the functional layer FL may be omitted.

[0087] refer to Figure 5B The anti-reflective layer RPL may include a high refractive index layer HR and a low refractive index layer LR. The high refractive index layer HR may have a refractive index greater than or equal to about 1.7 and less than or equal to about 2.5. The high refractive index layer HR may include a silicon (Si) nitride. In some examples, the high refractive index layer HR may include silicon nitride (SiN). X It may be at least one of silicon aluminum nitride (SiAlN), aluminum nitride (AlN), germanium dioxide (GeO2), zirconium dioxide (ZrO2), and titanium dioxide (TiO2). However, these are merely examples, and the high refractive index layer HR may include any known material with a high refractive index without limitation.

[0088] The low refractive index layer LR can have a refractive index greater than or equal to about 1.3 and less than or equal to about 1.7. The low refractive index layer LR can comprise an oxide containing silicon (Si) and / or an oxide containing aluminum (Al). In some examples, the low refractive index layer LR can comprise silicon oxide (SiO₂). X The low refractive index layer LR may include at least one of aluminum oxide (Al2O3) and silicon oxynitride (SiON). The low refractive index layer LR may include silicon dioxide (SiO2), however, this disclosure is not limited thereto or thereby restrictive. Therefore, in a further example, the low refractive index layer LR may also include any known material having a low refractive index.

[0089] A high refractive index layer HR can be composed of multiple individual layers (multiple high refractive index layers), such as high refractive index layers HR1, ..., HR2. n Composition. The low-refractive-index layer LR can be composed of multiple individual layers (multiple low-refractive-index layers), such as low-refractive-index layers LR1, LR2, ..., LR n LR n+1 Composition. In this case, n is an integer greater than or equal to 2. High refractive index layers HR1, ..., HR n They can have different thicknesses. Low refractive index layers LR1, LR2, ..., LR n LR n+1 They can have different thicknesses.

[0090] Including high refractive index layers HR1, ..., HR n and low refractive index layers LR1, LR2, ..., LR n LR n+1 The antireflective layer RPL can reduce reflectivity through destructive interference due to the difference in refractive index. Therefore, the cover window CW including the antireflective layer RPL can have low reflectivity and can improve the display device (such as...) Figure 2 The display quality of the display device (DD) shown. High refractive index layers HR1, ..., HR n It can be used with low refractive index layers LR1, LR2, ..., LR n LR n+1 Alternating arrangement. In this way, each high refractive index layer HR can be separated by a low refractive index layer LR, so that no two high refractive index layers HR or low refractive index layers LR are directly adjacent to each other.

[0091] In some examples, the antireflective layer RPL may include a first refractive index layer, a second refractive index layer disposed below the first refractive index layer, and a third refractive index layer disposed below the second refractive index layer. The first refractive index layer may correspond to a first low refractive index layer LR1 disposed at the topmost position of the antireflective layer RPL, the second refractive index layer may correspond to a first high refractive index layer HR1 disposed below the first low refractive index layer HR1, and the third refractive index layer may correspond to a second low refractive index layer LR2 disposed below the first high refractive index layer HR1.

[0092] The thickness of the first low-refractive-index layer LR1 can be greater than the thickness of each of the first high-refractive-index layer HR1 and the second low-refractive-index layer LR2. Furthermore, the thickness of the first high-refractive-index layer HR1 can be greater than the thickness of the second low-refractive-index layer LR2. As an example, the thickness of the first low-refractive-index layer LR1 can be greater than or equal to about 80 nm and less than or equal to about 100 nm, the thickness of the first high-refractive-index layer HR1 can be greater than or equal to about 50 nm and less than or equal to about 80 nm, and the thickness of the second low-refractive-index layer LR2 can be greater than or equal to about 5 nm and less than or equal to about 30 nm. The first low-refractive-index layer LR1 can have a refractive index greater than or equal to about 1.45 and less than or equal to about 1.5, the first high-refractive-index layer HR1 can have a refractive index greater than or equal to about 1.8 and less than or equal to about 2.1, and the second low-refractive-index layer LR2 can have a refractive index greater than or equal to about 1.45 and less than or equal to about 1.7.

[0093] In some variations of the example including a first low refractive index layer LR1, a first high refractive index layer HR1, and a second low refractive index layer LR2, the first low refractive index layer LR1 may include silicon dioxide (SiO2), the first high refractive index layer HR1 may include zirconium dioxide (ZrO2), tantalum pentoxide (Ta2O5), and silicon nitride (Si3N4), and the second low refractive index layer LR2 may include silicon dioxide (SiO2) and aluminum oxide (Al2O3).

[0094] [Table 1]

[0095] Table 1 above shows the results obtained by performing tests to evaluate the cover windows of the comparative examples and various non-limiting exemplary embodiments arranged based on the principles of this disclosure. A CM-3700A spectrochromometer (Konica Minolta, Inc.) was used to evaluate the cover windows of each example. According to the comparative examples, in the first through tenth layers, the first, third, fifth, seventh, and ninth layers are composed of silicon oxide (SiO₂). xThe low refractive index layer, as well as the second, fourth, sixth, eighth, and tenth layers, contain silicon nitride (SiN). x The exemplary embodiments of this disclosure (also referred to herein as “embodiments”) each include a subset of the layers from the first to the tenth layer, and the refractive index and thickness of each layer in the embodiments differ from those in the comparative examples.

[0096] Referring to Embodiment 2 as a representative example, the first layer may have a thickness greater than or equal to about 90 nm and less than or equal to about 100 nm, the second layer may have a thickness greater than or equal to about 50 nm and less than or equal to about 60 nm, the third layer may have a thickness greater than or equal to about 7 nm and less than or equal to about 13 nm, the fourth layer may have a thickness greater than or equal to about 70 nm and less than or equal to about 80 nm, the fifth layer may have a thickness greater than or equal to about 40 nm and less than or equal to about 50 nm, the sixth layer may have a thickness greater than or equal to about 17 nm and less than or equal to about 20 nm, and the seventh layer may have a thickness greater than or equal to about 70 nm and less than or equal to about 90 nm. When examining the ratio of the thickness of each layer to the thickness of the second layer (taken as 1), the first layer can have a thickness ratio greater than or equal to about 1.25 and less than or equal to about 1.68, the third layer can have a thickness ratio greater than or equal to about 0.12 and less than or equal to about 0.26, the fourth layer can have a thickness ratio greater than or equal to about 0.23 and less than or equal to about 1.37, the fifth layer can have a thickness ratio greater than or equal to about 0.27 and less than or equal to about 0.89, the sixth layer can have a thickness ratio greater than or equal to about 0.12 and less than or equal to about 0.56, and the seventh layer can have a thickness ratio greater than or equal to about 0.56 and less than or equal to about 1.55.

[0097] When comparing the thickness ratios described above (including each of Examples 1, 2, and 3) with those of the comparative examples, it is evident that the thickness ratio of each low-refractive-index layer relative to the first high-refractive-index layer in each of Examples 1, 2, and 3 is significantly higher than that of the same layers in the comparative examples. For example, using the values ​​in Table 1 for illustrative purposes, the thickness ratio between the first layer (LR1) and the second layer (HR1) in Example 2 is 1.583, while in the comparative examples it is 0.527. Furthermore, the thickness ratio between the fifth layer (LR3) and the second layer (HR1) in Example 2 is 0.750, while in the comparative examples it is 0.079. In the above respects, the thickness ratios of each of Examples 1, 2, and 3 are substantially similar. Therefore, the three color values ​​remain consistent at different curvature angles, and the color difference between flat and curved areas is reduced, thereby improving display quality.

[0098] In Table 1, R represents the reflectance value as a percentage, and a and b The color coordinates are represented by , and the cross-sectional color coordinates are represented by . Furthermore, "color difference when thickness is reduced by 10%" refers to the color difference when the thickness in the cross-section is reduced by 10%, and "color difference when thickness is reduced by 20%" refers to the color difference when the thickness in the cross-section is reduced by 20%. In some examples, a reduced thickness may exist in a display with a curved portion and a main portion, where the curved portion is curved relative to the main portion and has a reduced thickness relative to the main portion. This will be described in more detail below. The color difference is calculated using Equation 1 below.

[0099] Formula 1

[0100] Color difference=[ (Δ a ) 2 + (Δ b ) 2 ] 1 / 2

[0101] Referring to Table 1, it was observed that the reflectivity of the cover windows in Examples 1 to 3 was higher than that of the cover windows in the comparative examples. Furthermore, compared to the cover windows in the comparative examples, the cover windows in Examples 1 to 3 exhibited a color difference ranging from 0.8 to 1.5 when the thickness was reduced by 10%, and a color difference ranging from 1.3 to 2.3 when the thickness was reduced by 20%. These results indicate that the color difference in Examples 1 to 3 is low, and significantly lower than that in the comparative examples.

[0102] To further illustrate the above, we return to... Figure 5A The antireflective layer RPL may include a flat portion FP having a first thickness Th1 and a curved portion BP having a second thickness Th2, wherein the second thickness Th2 may be less than the first thickness Th1. Therefore, when the cover window is arranged in a manner such as the comparative example, a color difference may occur between the portion of the antireflective layer RPL corresponding to the flat portion FP and the portion of the antireflective layer RPL corresponding to the curved portion BP. However, referring to embodiments 1 to 3 of this disclosure, even when the thickness of the cover window is reduced by 10% or 20%, for example, in the curved portion relative to the flat portion, the color difference can be minimal compared to the comparative example. Therefore, the color perceived from the portion corresponding to the flat portion FP of the antireflective layer RPL and the color perceived from the portion corresponding to the curved portion BP of the antireflective layer RPL can be the same. That is, the cover window CW of this disclosure can have excellent reflectivity, i.e., low levels of reflected light, while providing improved display quality throughout the entire display area, including regions with different thicknesses.

[0103] Figures 6A to 6C This is a diagram illustrating Embodiment 2 of Table 1. Specifically, Figure 6A The reflectance spectrum of the flat portion of Example 2 described in Table 1 is shown. Figure 6B The reflection spectra of the curved portion of Embodiment 2 described in Table 1 are shown at different angles, and Figure 6C The tricolor values ​​for Example 2 described in Table 1 are shown.

[0104] refer to Figure 6A Observe the reflectivity as a function of wavelength in Example 2. When the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm, the maximum reflectivity occurs at a wavelength of about 380 nm and can be in the range of greater than or equal to about 20% and less than or equal to about 25%. When the wavelength is greater than or equal to about 430 nm and less than or equal to about 740 nm, the reflectivity can be greater than or equal to about 0.1% and less than or equal to about 2%.

[0105] Minimal reflectivity can be achieved at point a when the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm. The reflectivity at point a can be greater than or equal to about 0.1% and less than or equal to about 0.3%. Point a can be formed in a wavelength range greater than or equal to about 440 nm and less than or equal to about 460 nm.

[0106] A second maximum reflectivity can be formed at point b when the wavelength is in the range of approximately 380 nm or greater and approximately 740 nm or less. The reflectivity at point b can be greater than or equal to approximately 0.9% and less than or equal to approximately 1.5%. Point b can be formed in the wavelength range of approximately 500 nm or greater and approximately 520 nm or less. The reflectivity can increase as the wavelength increases between point a and point b.

[0107] A second minimum reflectivity can be formed at point c when the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm. The reflectivity at point c can be greater than or equal to about 0.5% and less than or equal to about 1.0%. Point c can be formed in a wavelength range greater than or equal to about 570 nm and less than or equal to about 590 nm. The reflectivity can decrease as the wavelength increases between point b and point c.

[0108] A third maximum reflectivity can be achieved at point d when the wavelength is greater than or equal to approximately 380 nm and less than or equal to approximately 740 nm. The reflectivity at point d can be greater than or equal to approximately 0.8% and less than or equal to approximately 1.3%. Point d can be formed in a wavelength range greater than or equal to approximately 660 nm and less than or equal to approximately 690 nm. The reflectivity can increase as the wavelength increases between point c and point d. The reflectivity can decrease as the wavelength increases in the region beyond point d.

[0109] Figure 6B Shown Figure 5A The graph shows the reflectance spectra measured at various angles of the curved portion BP. Specifically, the first curve GL1 shows the reflectance as a function of wavelength when the curved portion BP is not curved (e.g., the curvature angle of the curved portion BP is about 0°), the second curve GL2 shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is about 10°, the third curve GL3 shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is about 20°, the fourth curve GL4 shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is about 30°, and the fifth curve GL5 shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is about 40°.

[0110] Figure 6C A graph showing the tricolor values ​​as a function of the bending angle of the curved portion BP is shown, where the curved portion BP in this description can be... Figure 5A The curved portion BP is shown in the diagram. Specifically, the red curve R represents the X value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP, the green curve G represents the Y value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP, and the blue curve B represents the Z value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP.

[0111] refer to Figure 6B Observed corresponding to Figure 6A The points a, b, c, and d shown in the diagram, each of the first curve GL1, second curve GL2, third curve GL3, and fourth curve GL4 shifts to the left as the bending angle of the curved portion BP increases. Therefore, as... Figure 6CAs shown, it was observed that the trichromatic values, depending on the curvature angle of the curved portion BP, remain approximately constant around 10.00. That is, since there is almost no color difference with varying curvature angles, the color perceived from the portion corresponding to the flat portion FP of the antireflective layer RPL and the color perceived from the portion corresponding to the curved portion BP of the antireflective layer RPL can be the same. Therefore, the overlay window CW of this disclosure can have excellent reflectivity while providing improved display quality.

[0112] Figures 7A to 7C This is a diagram illustrating Embodiment 1 of Table 1. Specifically, Figure 7A The reflectance spectrum of the flat portion of Example 1 described in Table 1 is shown. Figure 7B The reflection spectra of the curved portion of Embodiment 1 described in Table 1 at different angles are shown, and Figure 7C The tricolor values ​​for Example 1 described in Table 1 are shown.

[0113] refer to Figure 7A The reflectivity as a function of wavelength in Example 1 was observed. When the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm, the maximum reflectivity occurs at a wavelength of about 380 nm and can be in the range of greater than or equal to about 20% and less than or equal to about 25%. When the wavelength is greater than or equal to about 430 nm and less than or equal to about 740 nm, the reflectivity can be greater than or equal to about 0.1% and less than or equal to about 2%.

[0114] Minimal reflectivity can be achieved at the first point a' when the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm. The reflectivity at the first point a' can be greater than or equal to about 0.1% and less than or equal to about 0.8%. The first point a' can be formed in a wavelength range greater than or equal to about 430 nm and less than or equal to about 460 nm.

[0115] A second maximum reflectivity can be formed at the second point b' when the wavelength is in the range of approximately 380 nm or greater and approximately 740 nm or less. The reflectivity at the second point b' can be greater than or equal to approximately 0.8% and less than or equal to approximately 1.0%. The second point b' can be formed in a wavelength range of approximately 500 nm or greater and approximately 520 nm or less. The reflectivity can increase as the wavelength increases between the first point a' and the second point b'. The reflectivity can decrease as the wavelength increases in the region after the second point b', and then increase again. However, compared with... Figure 7A Unlike the diagram shown, the reflectivity remains constant even when the wavelength increases in the region after the second point b'.

[0116] Figure 7B Shown Figure 5A The graph shows the reflectance spectra measured at various angles of the curved portion BP. Specifically, the first curve GL1a shows the reflectance as a function of wavelength when the curved portion BP is not curved (e.g., the curvature angle of the curved portion BP is approximately 0°), the second curve GL2a shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 10°, the third curve GL3a shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 20°, the fourth curve GL4a shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 30°, and the fifth curve GL5a shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 40°.

[0117] Figure 7C A graph showing the tricolor values ​​as a function of the bending angle of the curved portion BP is shown, where the curved portion BP in this description can be... Figure 5A The curved portion BP is shown in the diagram. Specifically, the red curve R' represents the X value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP, the green curve G' represents the Y value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP, and the blue curve B' represents the Z value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP.

[0118] refer to Figure 7B and Figure 7C Observed corresponding to Figure 7A The points in each of the first curve GL1a, the second curve GL2a, the third curve GL3a, and the fourth curve GL4a shown, where the first point a' and the second point b' are, shift to the left as the bending angle of the curved portion BP increases. Therefore, as... Figure 7C As shown, it was observed that the tricolor values ​​based on the bending angle of the bent portion BP remained approximately constant around 10.00.

[0119] Figures 8A to 8C This is a diagram illustrating Embodiment 3 of Table 1. Specifically, Figure 8A The reflectance spectrum of the flat portion of Example 3 described in Table 1 is shown. Figure 8B The reflectance spectra of the curved portion of Example 3 described in Table 1 at different angles are shown. Figure 8C The tricolor values ​​for Example 3 described in Table 1 are shown.

[0120] refer to Figure 8AObserve the reflectivity as a function of wavelength in Example 3. When the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm, the maximum reflectivity occurs at a wavelength of about 380 nm and can be in the range of greater than or equal to about 20% and less than or equal to about 25%. When the wavelength is greater than or equal to about 430 nm and less than or equal to about 740 nm, the reflectivity can be greater than or equal to about 0.1% and less than or equal to about 2%.

[0121] Minimal reflectivity can be achieved at the first point a'' when the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm. The reflectivity at the first point a'' can be greater than or equal to about 0.3% and less than or equal to about 0.6%. The first point a'' can be formed in a wavelength range greater than or equal to about 440 nm and less than or equal to about 460 nm.

[0122] A second maximum reflectivity can be formed at the second point b'' when the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm. The reflectivity at the second point b'' can be greater than or equal to about 0.6% and less than or equal to about 0.9%. The second point b'' can be formed in a wavelength range greater than or equal to about 480 nm and less than or equal to about 500 nm. As the wavelength increases between the first point a'' and the second point b'', the reflectivity can increase.

[0123] A second minimum reflectivity can be formed at the third point c'' when the wavelength is greater than or equal to about 380 nm and less than or equal to about 740 nm. The reflectivity at the third point c'' can be greater than or equal to about 0.4% and less than or equal to about 0.7%. The third point c'' can be formed in a wavelength range greater than or equal to about 550 nm and less than or equal to about 580 nm. As the wavelength increases between the second point b'' and the third point c'', the reflectivity can decrease.

[0124] A third maximum reflectivity can be achieved at the fourth point d'' when the wavelength is greater than or equal to approximately 380 nm and less than or equal to approximately 740 nm. The reflectivity at the fourth point d'' can be greater than or equal to approximately 0.6% and less than or equal to approximately 0.9%. The fourth point d'' can be formed in a wavelength range greater than or equal to approximately 620 nm and less than or equal to approximately 640 nm. As the wavelength increases between the third point c'' and the fourth point d'', the reflectivity can increase.

[0125] A third minimum reflectivity can be achieved at the fifth point e'' when the wavelength is greater than or equal to approximately 380 nm and less than or equal to approximately 740 nm. The reflectivity at the fifth point e'' can be greater than or equal to approximately 0.4% and less than or equal to approximately 0.7%. The fifth point e'' can be formed in a wavelength range greater than or equal to approximately 700 nm and less than or equal to approximately 740 nm. As the wavelength increases in the region following the fifth point e'', the reflectivity can increase.

[0126] Figure 8B Shown Figure 5A The graph shows the reflectance spectra measured at various angles of the curved portion BP. Specifically, the first curve GL1b shows the reflectance as a function of wavelength when the curved portion BP is not curved (e.g., the curvature angle of the curved portion BP is approximately 0°), the second curve GL2b shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 10°, the third curve GL3b shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 20°, the fourth curve GL4b shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 30°, and the fifth curve GL5b shows the reflectance as a function of wavelength when the curvature angle of the curved portion BP is 40°.

[0127] Figure 8C A graph showing the tricolor values ​​representing the bending angle of the curved portion BP as a function of the bending angle is shown, where the curved portion BP in this description can be... Figure 5A The curved portion BP is shown in the diagram. Specifically, the red curve R'' represents the X value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP, the green curve G'' represents the Y value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP, and the blue curve B'' represents the Z value in the XYZ chromaticity system as a function of the curvature angle of the curved portion BP.

[0128] refer to Figure 8B and Figure 8C Observed corresponding to Figure 8A The points in the first curve GL1b, the second curve GL2b, the third curve GL3b, and the fourth curve GL4b, representing the first point a'', the second point b'', the third point c'', and the fourth point d'' respectively, shift to the left as the bending angle of the curved portion BP increases. Therefore, as shown... Figure 8C As shown, it was observed that the tricolor values ​​based on the bending angle of the bent portion BP remained approximately constant around 10.00.

[0129] Although embodiments of this disclosure have been described, it is to be understood that this disclosure is not limited to these embodiments, and various changes and modifications can be made by those skilled in the art as described in the spirit and scope of this disclosure. Therefore, the subject matter disclosed should not be limited to any single embodiment described herein.

Claims

1. A display device, comprising: Display panel, including light-emitting elements; as well as A cover window, disposed on the display panel, and including a flat portion and a curved portion curving from the edge of the flat portion, the cover window comprising: The base layer; and An anti-reflective layer is disposed on the base layer, and includes a high refractive index layer and a low refractive index layer disposed on the high refractive index layer. Specifically, when light is received on the cover window, the reflectivity of the anti-reflection layer decreases as the wavelength of the light increases from 380 nm to 450 nm and from 500 nm to 580 nm.

2. The display device according to claim 1, wherein, The low-refractive-index layer includes: A first low-refractive-index layer is disposed on the high-refractive-index layer; and A second low-refractive-index layer is disposed below the high-refractive-index layer, such that the high-refractive-index layer separates the first low-refractive-index layer and the second low-refractive-index layer.

3. The display device according to claim 2, wherein, The first low-refractive-index layer has a refractive index in the range of 1.45 to 1.5, the high-refractive-index layer has a refractive index in the range of 1.8 to 2.1, and the second low-refractive-index layer has a refractive index in the range of 1.45 to 1.

7.

4. The display device according to claim 2, wherein, The first low-refractive-index layer has a first thickness, the high-refractive-index layer has a second thickness, and the first thickness is greater than the second thickness.

5. The display device according to claim 4, wherein, The second low-refractive-index layer has a third thickness, and the second thickness is greater than the third thickness.

6. The display device according to claim 1, wherein, When the wavelength of the light is in the range of 380 nm to 740 nm, the antireflective layer has a maximum reflectivity in the range of 20% to 25%.

7. The display device according to claim 1, wherein, The antireflective layer has minimum reflectivity when the wavelength of the light is in the range of 440 nm to 460 nm.

8. The display device according to claim 1, wherein, The anti-reflective layer has a minimum reflectivity in the range of 0.1% to 0.3%.

9. The display device according to claim 1, wherein, The reflectivity of the antireflective layer increases as the wavelength of the light increases from 460 nm to 500 nm.

10. The display device according to claim 1, wherein, The reflectivity of the antireflective layer increases as the wavelength of the light increases from 580 nm to 680 nm.

11. The display device according to claim 1, wherein, The reflectivity of the antireflective layer decreases as the wavelength of the light increases from 680 nm to 740 nm.

12. The display device according to claim 1, wherein, The high refractive index layer is the first high refractive index layer among a plurality of high refractive index layers, and the low refractive index layer is the first low refractive index layer among a plurality of low refractive index layers, wherein the plurality of high refractive index layers are arranged to alternate with the plurality of low refractive index layers.

13. The display device according to claim 12, wherein, The thickness ratio between the first low-refractive-index layer in the plurality of low-refractive-index layers and the first high-refractive-index layer in the plurality of high-refractive-index layers is in the range of 1.25 to 1.68, the first low-refractive-index layer is directly above the first high-refractive-index layer, and is further away from the base layer than all the other low-refractive-index layers in the plurality of low-refractive-index layers.

14. The display device according to claim 1, wherein, The thickness of the flat portion is greater than the thickness of the curved portion.

15. The display device according to claim 1, wherein, The cover window also includes a functional layer disposed on the anti-reflective layer, the functional layer including at least one of an antistatic agent, a hard coating agent, and an anti-fingerprint agent.

16. A display device, comprising: Display panel, including light-emitting elements; as well as A cover window is disposed on the display panel, the cover window comprising: The base layer; and An anti-reflective layer is disposed on the base layer and includes a first refractive index layer, a second refractive index layer disposed below the first refractive index layer, and a third refractive index layer disposed below the second refractive index layer, wherein the first refractive index layer is further away from the base layer than the third refractive index layer. Wherein, the refractive index of the second refractive index layer is greater than the refractive index of the first refractive index layer and the refractive index of the third refractive index layer, and the refractive index of the first refractive index layer is different from the refractive index of the third refractive index layer, and Wherein, the first thickness of the first refractive index layer is greater than the second thickness of the second refractive index layer, and the second thickness of the second refractive index layer is greater than the third thickness of the third refractive index layer.

17. The display device according to claim 16, wherein, The refractive index of the first refractive index layer is in the range of 1.45 to 1.5, the refractive index of the second refractive index layer is in the range of 1.8 to 2.1, and the refractive index of the third refractive index layer is in the range of 1.45 to 1.

7.

18. The display device according to claim 16, wherein, The reflectivity of the antireflective layer decreases as the wavelength of light received on the cover window increases from 380 nm to 450 nm and from 500 nm to 580 nm.

19. The display device according to claim 16, wherein, The antireflective layer has a minimum reflectivity when the wavelength of light received on the cover window is in the range of 440 nm to 460 nm, and the minimum reflectivity is in the range of 0.1% to 0.3%.

20. An electronic device comprising: A display device, wherein a module area is defined in the display device; as well as The electronic module is configured to correspond to the module area. The display device includes: Display panel, including light-emitting elements; and A cover window, disposed on the display panel, and including a flat portion and a curved portion curving from the edge of the flat portion, the cover window comprising: The base layer; and An anti-reflective layer is disposed on the base layer, and includes a high refractive index layer and a low refractive index layer disposed on the high refractive index layer. Specifically, when light is received on the cover window, the reflectivity of the anti-reflection layer decreases as the wavelength of the light increases from 380 nm to 450 nm and from 500 nm to 580 nm.

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