Display device and display device manufacturing method

Abstract

The invention discloses a display device and a display device manufacturing method. The display device manufacturing method comprises the steps of providing a display panel; and forming, on the display panel, a coating window having an outer surface including a rear surface adjacent to the display panel, a front surface facing the rear surface in the thickness direction, and a side surface at least partially having a first radius of curvature of 0.1-5 mm from the front surface toward the rear surface, the step of forming the coated window on the display panel includes: a step of forming a preliminary coated window including a first prepared portion and a second prepared portion partitioned from the first prepared portion by a boundary surface, and including a photocurable resin; forming a cured surface by irradiating the boundary surface with light of a first wavelength; a step for removing the second pre-prepared part from the pre-coating window body; and a step of irradiating the first prepared part with light having a second wavelength smaller than the first wavelength to cure the first prepared part.

Description

Technical Field

[0001] The present invention relates to a display device and a method of manufacturing the same. More specifically, the present invention relates to a display device including a coated window and a method of manufacturing the same. Background Art

[0002] Display devices such as televisions, monitors, smartphones, and tablets that provide images to users include a display panel for displaying an image. As the display panel, various display panels such as a liquid crystal display panel, an organic light emitting display panel, an electrowetting display panel, and an electrophoretic display panel are being developed. In addition, the display device may include a window for protecting the display panel. The window may be attached to the display panel through a lamination process. Summary of the Invention

[0003] An object of the present invention is to provide a display device including a coated window.

[0004] An object of the present invention is to provide a method of manufacturing a display device including a coated window.

[0005] A method of manufacturing a display device according to an embodiment of the present invention includes: providing a display panel; and forming a coated window on the display panel, the outside of which includes a back surface adjacent to the display panel, a front surface opposite to the back surface in a thickness direction, and a side surface having a first curvature radius of 0.1 mm or more and 5 mm or less at least a part of which extends from the front surface toward the back surface. The step of forming the coated window on the display panel includes: forming a preliminary coated window including a first preliminary part and a second preliminary part divided from the first preliminary part by a boundary surface and including a photocurable resin; irradiating the boundary surface with light of a first wavelength to form a cured surface; removing the second preliminary part from the preliminary coated window; and irradiating the first preliminary part with light of a second wavelength shorter than the first wavelength to cure the first preliminary part.

[0006] The step of forming the cured surface may be performed by two-photon polymerization reaction.

[0007] At least a part of the second preliminary part may be thicker than the thickness of the first preliminary part.

[0008] The light of the first wavelength may be visible light or infrared light.

[0009] It may be that the light of the second wavelength is ultraviolet light.

[0010] It may be that the first wavelength is above 680 nm and below 1030 nm.

[0011] It may be that the second wavelength is above 100 nm and below 400 nm.

[0012] It may be that the step of forming the cured surface by irradiating the boundary surface with the light of the first wavelength includes a femtosecond laser beam process.

[0013] It may be that in the femtosecond laser beam process, the laser pulse width is above 0.01 ps and below 1 ps.

[0014] It may be that the photocurable resin is a UV curable resin.

[0015] It may be that the photocurable resin includes a siloxane resin.

[0016] A display device according to an embodiment of the present invention includes: a display panel; and a coating window configured on the display panel and including a first substance, an outer surface of the coating window includes: a back surface adjacent to the display panel; a front surface opposite to the back surface in a thickness direction; and a side surface having a first curvature radius of 0.1 mm or more and 5 mm or less at least partially from the front surface toward the back surface, and the first substance includes a photocurable resin.

[0017] It may be that the front surface of the coating window includes a transmission region and a border region adjacent to the transmission region, and the coating window includes a first portion overlapping with the transmission region and a second portion overlapping with the border region.

[0018] It may be that the first portion includes the first substance, the second portion includes the first substance and a second substance, and the second substance is a substance that overcures the first substance or a substance that carbonizes the first substance.

[0019] It may be that it further includes: a light-shielding layer configured under the second portion and including a light-shielding substance.

[0020] It may be that the first substance includes a UV curable resin.

[0021] It may be that the first substance includes a photocurable siloxane resin.

[0022] It may be that the surface roughness of the side surface is the same as the surface roughness of the front surface or the surface roughness of the back surface.

[0023] It may be that the side surface of the coating window protrudes more in cross-section than the side surface of the display panel.

[0024] It may be that it further includes: an optical layer disposed between the coating window and the display panel.

[0025] The display device according to an embodiment of the present invention may include a coating window to omit a lamination process, thereby simplifying the manufacturing process and reducing costs.

[0026] The method for manufacturing a display device according to an embodiment of the present invention may include a step of removing a second preparation part after forming a curing surface, thereby providing a coating window with improved thickness uniformity. Accordingly, a display device with improved reliability can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of a display device according to an embodiment of the present invention.

[0028] Figure 2 is an exploded perspective view of a display device according to an embodiment of the present invention.

[0029] Figure 3 is a cross-sectional view of a display device according to an embodiment of the present invention.

[0030] Figure 4 is a cross-sectional view of a display panel according to an embodiment of the present invention.

[0031] Figure 5 is an enlarged cross-sectional view showing a part of a display device according to an embodiment of the present invention.

[0032] Figure 6a and Figure 6b is a flowchart showing some steps in the method for manufacturing a display device according to an embodiment of the present invention.

[0033] Figures 7a to 7d is a cross-sectional view showing some steps in the method for manufacturing a display device according to an embodiment of the present invention.

[0034] (Description of Reference Numerals)

[0035] DD: Display Device DP: Display Panel

[0036] CW: Coating Window FS: Front

[0037] RS: Rear SS: Side

[0038] BM: Light-Shielding Layer C1, C2: First Part, Second Part

[0039] PCW: Preliminary Coated Form; P1, P2: First Preliminary Section, Second Preliminary Section Detailed Implementation Manner

[0040] In this specification, when referring to a certain component (or region, layer, part, etc.) being "on", "connected to", or "combined with" another component, it means that a certain component can be directly disposed / connected / combined on another component or a third component can be disposed between them.

[0041] The same reference numerals refer to the same components. Additionally, in the drawings, the thickness, ratio, and dimensions of the components are enlarged for the effective illustration of the technical content. "And / or" includes all combinations that can be defined by the relevant components.

[0042] Terms such as first, second, etc. may be used to describe various components, but the above components are not limited by the above terms. The above terms are only used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the rights of the present invention, the first component may be named the second component, and similarly, the second component may also be named the first component. As long as it is not clearly indicated as different in the context, the singular expression includes the plural expression.

[0043] In addition, terms such as "under", "lower side", "above", "upper side", etc. are used to describe the relationship between the components shown in the drawings. The above terms are relative concepts and are described based on the directions shown in the drawings.

[0044] Terms such as "comprising" or "having" should be understood as being used to specify the existence of the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and do not preclude the existence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0045] The terms “part” and “unit” mean software components or hardware components that perform specific functions. Hardware components can include, for example, FPGA (field-programmable gate array) or ASIC (application-specific integrated circuit). Software components can refer to executable code and / or data used by the executable code in an addressable storage medium. Therefore, software components can be, for example, object-oriented software components, class components, and job components, and can include processes, functions, attributes, steps, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrangements, or variables.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification have the same meaning as commonly understood by those skilled in the art to which this invention belongs. In addition, terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as in the context of the related art, and should not be interpreted as having overly idealized or overly formal meanings unless explicitly defined herein.

[0047] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0048] Figure 1 is a perspective view of a display device DD according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a display device DD according to an embodiment of the present invention. Figure 3 is a cross-sectional view of a display device DD according to an embodiment of the present invention. Figure 3 shows the correspondence with Figure 2 the cross-section corresponding to the I-I' cut line of

[0049] Referring to Figure 1 and Figure 2 , the display device DD can be a device that is activated by an electrical signal and displays an image. For example, the display device DD can be included not only in large devices such as televisions and external billboards, but also in small and medium-sized devices such as monitors, mobile phones, tablets, computers, navigators, and game consoles. On the other hand, the embodiments of the display device DD are exemplary, and as long as they do not exceed the concept of the present invention, they are not limited to any one. In this embodiment, a mobile phone is shown as an example of the display device DD.

[0050] Referring to Figure 1, the display device DD may have a quadrilateral shape with rounded corners on a plane, having a short side extending in a first direction DR1 and a long side extending in a second direction DR2 intersecting the first direction DR1. However, it is not limited thereto, and the display device DD may have various shapes such as a rectangle, a square, a circle, a polygon, an irregular shape, etc. on a plane.

[0051] The display device DD of one embodiment may be flexible. The so-called "flexible" means the property of being able to bend, and may include all structures from a fully folded structure to a structure that can bend at the nanometer level. For example, the flexible display device DD may include a curved display device, a foldable display device, a slidable or rollable display device. However, it is not limited thereto, and the display device DD may be rigid.

[0052] The display device DD may display an image IM toward a third direction DR3 on a display surface parallel to each of the first direction DR1 and the second direction DR2. The third direction DR3 of the display device DD may be juxtaposed with the thickness direction intersecting the first direction DR1 and the second direction DR2. The image IM provided from the display device DD may include not only a moving image but also a still image. Figure 1 A clock window and an icon are shown as an example of the image IM. The display surface for displaying the image IM may correspond to the front surface of the display device DD and may correspond to the front surface FS of the coating form CW (refer to Figure 2 ). On the other hand, Figure 1 An exemplary planar display surface is shown, but it is not limited thereto, and the display surface of the display device DD may also include a curved surface curved from at least one side of the plane.

[0053] The front (or upper surface) and the back (or lower surface) of each component constituting the display device DD may oppose each other in the third direction DR3, and the normal direction of each of the front and the back may be substantially parallel to the third direction DR3. The distance between the front and the back defined along the third direction DR3 may correspond to the thickness of the component (or unit). In this specification, "on a plane" may be defined as a state observed in the third direction DR3. In this specification, "in a cross-section" may be defined as a state observed in the first direction DR1 or the second direction DR2. On the other hand, the directions indicated by the first to third directions DR1, DR2, DR3 are relative concepts and may be converted to other directions.

[0054] Refer to Figure 2 and Figure 3, the display device DD may include a coating window CW, an optical layer RPL, a display panel DP, a protection panel CP, and a housing EDC. The coating window CW may be combined with the housing EDC to form the appearance of the display device DD.

[0055] The coating window CW may be disposed on the display panel DP. The coating window CW may have a shape corresponding to the shape of the display panel DP. The coating window CW may cover the entire outside of the display panel DP and protect the display panel DP from external impacts and scratches.

[0056] The coating window CW may include an optically transparent insulating material. The transmittance of the coating window CW for light in the visible light wavelength region may be 90% or more. The transmittance of the coating window CW for light in the wavelength region of 380 nm or more and 780 nm or less may be 90% or more. The coating window CW may have a single-layer or multi-layer structure. The coating window CW may further include one or more optically transparent functional layers. For example, the coating window CW may further include functional layers such as an anti-fingerprint layer, a phase control layer, and a hard coating. A specific description of the composition of the coating window CW will be described below in Figure 5 It will be described.

[0057] The front surface FS of the coating window CW may include a transmissive region TA and a border region BZA. The transmissive region TA of the coating window CW may be an optically transparent region. The coating window CW may transmit the image IM provided by the display panel DP through the transmissive region TA, and the user can recognize the corresponding image IM.

[0058] The border region BZA of the coating window CW may prevent a component of the display panel DP that is overlapped with the border region BZA from being recognized externally. The border region BZA of the coating window CW may overlap with a light-shielding layer BM. The side surface SS of the coating window (refer to Figure 5 ) may protrude outward from the outside of the display panel DP. Thus, the light-shielding layer BM may cover the non-display region NDA of the display panel DP and the outside.

[0059] The light-shielding layer BM may include a predetermined light-shielding material. The light-shielding layer BM may include at least one of a colored color layer and a black light-shielding layer. The light-shielding layer BM may include a plurality of light-shielding layers as needed. The light-shielding layer BM may be formed on the coating window CW by a vapor deposition, printing, or coating process, etc. For example, the light-shielding layer BM may be an ink including a light-shielding component printed on the coating window CW.

[0060] The border area BZA can be adjacent to the transmissive area TA. The shape of the transmissive area TA can be substantially defined by the border area BZA. For example, the border area BZA can be disposed outside the transmissive area TA and surround the transmissive area TA. However, it is shown by way of example that the border area BZA can be adjacent to only one side of the transmissive area TA or omitted. Additionally, the border area BZA can also be disposed on a side that is not the front side of the display device DD.

[0061] The optical layer RPL can be disposed between the display panel DP and the coating window CW. The optical layer RPL can reduce the reflectance of light incident from the outside. The optical layer RPL can include a retarder and / or a polarizer. The optical layer RPL can at least include a polarizing film. At this time, the optical layer RPL can be attached to the display panel DP through an adhesive layer. However, this is exemplary and not limited thereto. For example, the optical layer RPL can include a color filter.

[0062] The display panel DP can be disposed between the coating window CW and the protection panel CP. The display panel DP can display an image corresponding to an electrical signal. The display panel DP according to an embodiment can be a light-emitting display panel, but is not particularly limited. For example, the display panel DP can be an organic light-emitting display panel, an inorganic light-emitting display panel, an organic-inorganic light-emitting display panel, or a quantum dot light-emitting display panel. The light-emitting layer of the organic light-emitting display panel can include an organic light-emitting material, and the light-emitting layer of the inorganic light-emitting display panel can include an inorganic light-emitting material. The light-emitting layer of the organic-inorganic light-emitting display panel can include an organic-inorganic light-emitting material. The light-emitting layer of the quantum dot light-emitting display panel can include quantum dots and quantum rods, etc.

[0063] The image IM provided by the display device DD can be displayed on the front side IS of the display panel DP. The front side IS of the display panel DP can include a display area DA and a non-display area NDA. The display area DA can be an area that is activated and displays an image according to an electrical signal. According to an embodiment, the display area DA of the display panel DP can correspond to the transmissive area TA of the coating window CW. On the other hand, in this specification, "an area / portion and an area / portion correspond" means "overlap with each other", and is not limited to having the same area and / or the same shape.

[0064] The non-display area NDA can be adjacent to the outside of the display area DA. For example, the non-display area NDA can surround the display area DA. However, it is not limited thereto, and the non-display area NDA can be defined in various shapes.

[0065] The non-display area NDA can be an area for a driving circuit or driving lines configured to drive components disposed in the display area DA, various signal lines for providing electrical signals, pads, etc. The non-display area NDA of the display panel DP can correspond to the border area BZA of the coating window CW. The configuration of the display panel DP disposed in the non-display area NDA can be prevented from being externally recognized through the border area BZA.

[0066] The display device DD can include a circuit board MB connected to the display panel DP. The circuit board MB can be connected to one end of the display panel DP extending in the first direction DR1. The circuit board MB can generate electrical signals provided to the display panel DP. For example, the circuit board MB can include a timing controller that generates signals provided to the driving unit of the display panel DP in response to control signals received from the outside.

[0067] At least a part of the non-display area NDA of the display panel DP can be bent. A part of the display panel DP connected to the circuit board MB can be bent such that the circuit board MB faces the back surface of the display panel DP. The circuit board MB can be assembled to be disposed in a plane overlapping the back surface of the display panel DP. However, it is not limited thereto, and the display panel DP and the circuit board MB can be connected through a flexible circuit board connected to one end of the display panel DP and the circuit board MB, respectively.

[0068] The protection panel CP can be disposed on the lower surface of the display panel DP. The protection panel CP can protect the display panel DP from impacts transmitted from below. In Figure 5 the protection panel CP is shown as a single layer, however, the protection panel CP can be a multi-layer structure including a barrier layer and a buffer layer, etc. The barrier layer of the protection panel CP can have a color with a low light transmittance to prevent the components below the barrier layer from being recognized. The buffer layer of the protection panel CP can be disposed on the barrier layer to absorb impacts transmitted from below the display panel DP. The buffer layer of the protection panel CP can be a highly elastic material such as a foamed sheet formed with a plurality of openings.

[0069] The housing EDC can provide an internal space capable of accommodating the components of the display device DD. The housing EDC can be disposed under the display panel DP to accommodate the display panel DP. The housing EDC can include a glass, plastic, or metal material having relatively high rigidity. The housing EDC can absorb impacts applied from the outside or prevent foreign substances / moisture from penetrating into the display panel DP to protect the display panel DP.

[0070] On the other hand, the display device DD according to an embodiment may further include an input sensing layer disposed on the display panel DP and sensing an external input applied from the outside. The input sensing layer may sense various forms of external inputs such as force, pressure, temperature, and light provided from the outside. For example, the input sensing layer may sense contact caused by a user's body or a pen provided from the outside of the display device DD or an input (e.g., hovering) applied by approaching the display device DD.

[0071] In addition, the display device DD may further include an electronic module having various functional modules for operating the display panel DP and a power supply module for supplying power required for the display device DD. For example, the display device DD may include a camera module as an example of the electronic module.

[0072] Figure 4 It is a cross-sectional view of a display panel DP according to an embodiment of the present invention.

[0073] The display panel DP according to an embodiment of the present invention may be a light-emitting display panel without particular limitation. For example, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, or a quantum dot light-emitting display panel. The light-emitting layer of the organic light-emitting display panel may include an organic light-emitting material, and the light-emitting layer of the inorganic light-emitting display panel may include an inorganic light-emitting material. The light-emitting layer of the quantum dot light-emitting display panel may include quantum dots and quantum rods, etc. Hereinafter, the display panel DP is described as an organic light-emitting display panel.

[0074] The display panel DP may include a base layer SUB, a display element layer DP-EL, a circuit layer DP-CL, and a packaging layer TFE. The display panel DP according to the present invention may be a flexible display panel. However, the present invention is not limited thereto. For example, the display panel DP may be a foldable display panel or a rigid display panel folded based on a folding axis.

[0075] The base layer SUB may provide a base surface for disposing the circuit layer DP-CL. The base layer SUB may be a flexible substrate capable of bending, folding, rolling, etc. The base layer SUB may be a glass substrate, a metal substrate, or a polymer substrate, etc. However, the embodiment is not limited thereto, and the base layer SUB may include an inorganic layer, an organic layer, or a composite material layer.

[0076] The base layer SUB may include a single layer or multiple layers. For example, the base layer SUB may include a first synthetic resin layer, a multiple-layer or single-layer inorganic layer, and a second synthetic resin layer disposed on the multiple-layer or single-layer inorganic layer. Each of the first synthetic resin layer and the second synthetic resin layer may include a polyimide resin. Additionally, each of the first synthetic resin layer and the second synthetic resin layer may include at least one of an acrylic resin, a methacrylic resin, a polyisoprene resin, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a siloxane resin, a polyamide resin, and a perylene resin. In this specification, the "~~-type" resin means a resin including the functional group of "~~".

[0077] The circuit layer DP-CL is disposed between the base layer SUB and the display element layer DP-EL. The circuit layer DP-CL includes at least one insulating layer and circuit elements. Hereinafter, the insulating layer included in the circuit layer DP-CL is referred to as an intermediate insulating layer. The intermediate insulating layer includes at least one intermediate inorganic layer and at least one intermediate organic layer. The circuit elements may have pixel driving circuits included in each of a plurality of pixels for displaying an image. The circuit layer DP-CL may further include signal lines connected to the pixel driving circuits and / or sensor driving circuits.

[0078] The display element layer DP-EL may have light-emitting elements included in each of the pixels. The light-emitting elements may be provided as a plurality, and the plurality of light-emitting elements may correspond to a plurality of light-emitting regions. For example, the plurality of light-emitting regions may include a red light-emitting region, a green light-emitting region, and a blue light-emitting region.

[0079] The encapsulation layer TFE may be disposed on the display element layer DP-EL to seal the display element layer DP-EL. The encapsulation layer TFE may include at least one organic layer and at least one inorganic layer. The inorganic layer may include an inorganic substance to protect the display element layer DP-EL from the influence of moisture / oxygen. The inorganic layer may include a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, an aluminum oxide layer, etc., but is not particularly limited thereto. The organic layer may include an organic substance to protect the display element layer DP-EL from foreign substances such as dust particles.

[0080] Figure 5 It is a cross-sectional view showing a part of a display device according to an embodiment of the present invention in an enlarged manner. Figure 5 Enlarged view shows the cross-section corresponding to the AA' region of Figure 3 ​Figure 5 It is a cross-sectional view for showing the coating window CW of the present invention in more detail.

[0081] Refer to Figure 5 , the outer surface of the coating window CW includes a front surface FS, a back surface RS, and a side surface SS. The front surface FS of the coating window CW can correspond to the front surface of the display device DD that displays the image IM (refer to Figure 1 ). The back surface RS of the coating window CW can be the surface adjacent to the display panel DP in the third direction DR3. The back surface RS of the coating window CW can be defined as the surface opposite to the front surface FS of the coating window CW in the third direction DR3.

[0082] The coating window CW includes at least one side surface SS, and the side surface SS of the coating window CW has a first radius of curvature. The first radius of curvature can be defined as the minimum value of the radius of the arc that is closest to the curved surface in all directions from a point on the side surface SS of the coating window CW. The first radius of curvature can be 0.1 mm or more and 5 mm or less. For example, the first radius of curvature can be 1 mm or more and 5 mm or less.

[0083] The surface roughness of the side surface SS of the coating window CW can be substantially the same as the surface roughness of the front surface FS or the back surface RS of the coating window CW. On the other hand, in this specification, "substantially the same" not only includes the case where the surface roughness and the like of the components are physically exactly the same, but also includes the case where there are differences in the error range caused by the process even for the same design. When manufacturing the coating window CW according to an embodiment of the present invention, the side surface SS of the coating window CW may not be physically damaged. Thus, the side surface SS of the coating window CW can have a surface roughness value at a level substantially the same as that of the other outer surfaces of the coating window CW.

[0084] The coating window CW includes a first material of a photocurable resin material. The first material can include a UV curable resin material. For example, the first material can include a UV curable silicone resin material. The coating window CW can be formed by a process of coating a liquid resin composition. The coating window CW is formed by coating a liquid resin composition, so that the coating window CW may not include a glass substrate. Conventional display devices are manufactured by providing a window including a glass substrate on a display panel. The window including the glass substrate is attached to the display panel by a lamination process, and a bonding member for attaching the window is required. In contrast, in one embodiment, the coating window CW formed by a liquid composition does not require an attachment process and a bonding member, etc., which can contribute to improving the manufacturing efficiency and reducing the thickness of the display device.

[0085] The coating window CW may include a first part C1 and a second part C2. It may be that the first part C1 overlaps with the transmissive area TA of the front surface FS, and the second part C2 overlaps with the border area BZA of the front surface FS. It may be that the first part C1 is the part corresponding to the transmissive area TA of the front surface FS, and the second part C2 is the part corresponding to the border area BZA of the front surface FS. It may be that the side surface SS of the second part C2 corresponds to the side surface SS of the coating window CW, and the side surface SS of the second part C2 substantially defines the side surface SS of the coating window CW.

[0086] Each of the first part C1 of the coating window CW and the second part C2 of the coating window CW may include a first substance of a photocurable resin. The second part C2 may include a first substance of a photocurable resin and further include a second substance different from the first substance. The second substance may be a substance that carbonizes at least a part of the first substance. Alternatively, the second substance may be a substance that overcures at least a part of the first substance. When the second part C2 includes the second substance, at least a part of the second part C2 may be formed by a process of overcuring or carbonizing the first substance of the photocurable resin. When manufacturing the coating window CW according to an embodiment of the present invention, a part of the side surface SS of the coating window CW may be overcured or carbonized. However, the embodiments of the present invention are not limited thereto, and it may also be that the coating window CW does not include the second substance, and each of the first part C1 and the second part C2 only includes the first substance.

[0087] Hereinafter, with reference to Figure 6a 、 Figure 6b and Figures 7a to 7d a method for manufacturing a display device DD according to an embodiment of the present invention will be described.

[0088] Figure 6a is a flowchart showing some steps in a method for manufacturing a display device according to an embodiment of the present invention. Figure 6b is a flowchart showing the step of forming a coating window in a method for manufacturing a display device according to an embodiment of the present invention. Figures 7a to 7d is a cross-sectional view showing some steps in a method for manufacturing a display device according to an embodiment of the present invention. On the other hand, when describing a method for manufacturing a display device according to an embodiment of the present invention, the same reference numerals are given to the same components as those described above, and detailed descriptions thereof are omitted.

[0089] With reference to Figure 6a ]>According to an embodiment of the present invention, a method for manufacturing a display device includes: a step (S100) of providing a display panel; and a step (S200) of forming a coating window on the display panel. With reference to Figure 6b, the step (S200) of forming a coating form in the method for manufacturing a display device according to an embodiment of the present invention may include: a step (S210) of forming a preliminary coating form including a first preliminary part and a second preliminary part; a step (S220) of irradiating a light of a first wavelength to the boundary surface to form a cured surface; a step (S230) of removing the second preliminary part from the preliminary coating form; and a step (S240) of irradiating a light of a second wavelength to cure the first preliminary part.

[0090] Figures 7a to 7d FIG. is a diagram schematically showing the step (S200) of forming a coating form in the method for manufacturing a display device according to an embodiment. Figure 7a Schematically shows the step (S210) of forming a preliminary coating form including a first preliminary part and a second preliminary part, Figure 7b Schematically shows the step (S220) of irradiating a light of a first wavelength to the boundary surface to form a cured surface, Figure 7c Schematically shows the step (S230) of removing the second preliminary part from the preliminary coating form, Figure 7d Schematically shows the step (S240) of irradiating a light of a second wavelength to cure the first preliminary part.

[0091] Referring to Figure 6b and Figure 7a , the method for manufacturing a display device according to an embodiment of the present invention includes a step (S210) of forming a preliminary coating form PCW including a first preliminary part P1 and a second preliminary part P2.

[0092] The step (S210) of forming the preliminary coating form PCW may include a step of providing a liquid resin composition. The step (S210) of forming the preliminary coating form PCW may include a step of coating the liquid resin composition through a nozzle. The step (S210) of forming the preliminary coating form PCW may include an inkjet process or a jet dispensing process. The liquid resin composition may include a photocurable resin material. The liquid resin composition may include a UV curable resin material and may include a siloxane resin material.

[0093] The preliminary coating form PCW may include a first preliminary part P1 and a second preliminary part P2. It may be that the first preliminary part P1 corresponds to the coating form CW described later (refer to Figure 7d ), and the second preliminary part P2 surrounds the first preliminary part P1 on a plane. The first preliminary part P1 and the second preliminary part P2 may be divided by a boundary surface OL. The boundary surface OL may be defined as a side surface shared by the first preliminary part P1 and the second preliminary part P2. The boundary surface OL may correspond to the side surface SS (refer to Figure 7d ) of the coating form CW described later (refer to Figure 7d ).

[0094] The thickness of the first preparation part P1 may be substantially uniform in a plane. The thickness of the first preparation part P1 may be substantially constant in the first direction DR1 and the second direction DR2. The thickness of the second preparation part P2 may not be uniform in a plane. The thickness of the second preparation part P2 may be relatively thick or relatively thin with respect to an arbitrary average value. The thickness of at least a part of the second preparation part P2 may be relatively thicker than the thickness of the first preparation part P1. The preliminary coating form PCW is formed by a step of coating a liquid composition. Thus, due to the surface tension of the liquid or the like, only the thickness of the second preparation part P2 adjacent to the periphery may become non-uniform.

[0095] Reference Figure 6b 、 Figure 7a and Figure 7b According to an embodiment of the present invention, a method for manufacturing a display device includes a step (S220) of irradiating a boundary surface OL with light of a first wavelength to form a cured surface OL-C.

[0096] The cured surface OL-C may be a cured surface of the boundary surface OL by light of the first wavelength. It may be that the boundary surface OL includes a liquid photocurable resin composition, and the cured surface OL-C is a cured liquid photocurable resin composition. For example, the cured surface OL-C may be a cured UV-curable resin composition.

[0097] The light of the first wavelength may be visible light or infrared light. The first wavelength may be 400 nm or more and 2000 nm or less. For example, the first wavelength may be 680 nm or more and 1030 nm or less.

[0098] The step (S220) of forming the cured surface OL-C may include a step of irradiating the boundary surface OL with a laser LS that emits light of the first wavelength. The step (S220) of forming the cured surface OL-C may include a step of simultaneously irradiating a plurality of lasers LS at a point. According to irradiating a plurality of lasers LS at a point, the light of the first wavelength provided at a point may be synthesized. As the laser LS that emits light of the first wavelength of visible light or infrared light is provided in plurality, the cured surface OL-C may be substantially UV-cured.

[0099] The step of irradiating the boundary surface OL with a laser LS that emits light of the first wavelength may include a femtosecond laser beam process. In the femtosecond laser beam process, the laser pulse width may be 0.01 ps or more and 1 ps or less.

[0100] The step (S220) of forming the cured surface OL-C may include the step of curing the edge surface OL by two-photon polymerization (2PP) using light of a first wavelength. That is, the step (S220) of forming the cured surface OL-C may be a process of 3D-printing the cured surface OL-C using two-photon polymerization.

[0101] Referring to Figure 6b , Figures 7b to 7d , a method of manufacturing a display device according to an embodiment of the present invention includes a step (S230) of removing the second preliminary portion P2 from the preliminary coating form PCW, and includes a step (S240) of irradiating light of a second wavelength to cure the first preliminary portion P1.

[0102] The second preliminary portion P2 may be removed from the preliminary coating form PCW. It may be that the second preliminary portion P2 is spaced apart from the first preliminary portion P1 on the cured surface OL-C, and the spaced second preliminary portion P2 is removed. The second preliminary portion P2 may not be included in the coating form CW (refer to Figure 7d ) to be described later.

[0103] The first preliminary portion P1 may be photocured by light of a second wavelength. The first preliminary portion P1 may be UV-cured by a UV lamp LL. It may be that the UV lamp LL is provided on the first preliminary portion P1, and the UV lamp LL emits light of a second wavelength. The light of the second wavelength may be ultraviolet light. The second wavelength has a value smaller than the first wavelength. The second wavelength may be 100 nm or more and 400 nm or less. The coating form CW may be photocured for the first preliminary portion P1.

[0104] When manufacturing a display device including a coating form, in the step of coating a liquid resin composition, due to surface tension, the thickness of the peripheral portion may be uneven compared to the central portion. A method of manufacturing a display device according to an embodiment of the present invention includes a step of coating a liquid resin composition to form a preliminary coating form, then forming a cured surface by two-photon polymerization, and removing the second preliminary portion through the cured surface, thereby providing a display device with improved thickness uniformity and increased reliability. In addition, even if the second portion of the coating form overlapping the border region in an embodiment of the display device has a constant curvature, since the method of manufacturing a display device according to an embodiment includes a 3D printing process based on two-photon polymerization, a coating form with increased reliability can also be provided.

[0105] As described above, the present invention has been described with reference to the preferred embodiments. However, those skilled in the art or those with ordinary knowledge in the technical field can understand that various modifications and changes can be made to the present invention without departing from the concept of the present invention described in the appended claims and the scope of the technical field. Therefore, the technical scope of the present invention is not limited by the content described in the detailed description of the specification, but should be defined by the scope of the claims.

Claims

1. A method for manufacturing a display device, comprising: providing a display panel; and forming a coating form body on the display panel, the outer surface of which includes a back surface adjacent to the display panel, a front surface opposite to the back surface in the thickness direction, and a side surface with a first radius of curvature of 0.1 mm or more and 5 mm or less at least in part from the front surface towards the back surface; The step of forming the coating form body on the display panel includes: forming a preliminary coating form body including a first preliminary part and a second preliminary part divided from the first preliminary part by a boundary surface and including a photocurable resin; irradiating the boundary surface with light of a first wavelength to form a cured surface; removing the second preliminary part from the preliminary coating form body; and irradiating the first preliminary part with light of a second wavelength shorter than the first wavelength to cure the first preliminary part.

2. The method for manufacturing a display device according to claim 1, wherein the step of forming the cured surface is performed by two-photon polymerization reaction.

3. The method for manufacturing a display device according to claim 1, wherein at least a part of the thickness of the second preliminary part is thicker than the thickness of the first preliminary part.

4. The method for manufacturing a display device according to claim 1, wherein the light of the first wavelength is visible light or infrared light.

5. The method for manufacturing a display device according to claim 1, wherein the light of the second wavelength is ultraviolet light.

6. The method for manufacturing a display device according to claim 1, wherein the first wavelength is 680 nm or more and 1030 nm or less.

7. The method for manufacturing a display device according to claim 1, wherein the second wavelength is 100 nm or more and 400 nm or less.

8. The method for manufacturing a display device according to claim 1, wherein the step of irradiating the boundary surface with the light of the first wavelength to form the cured surface includes a femtosecond laser beam process.

9. The method for manufacturing a display device according to claim 8, wherein in the femtosecond laser beam process, the laser pulse width is 0.01 ps or more and 1 ps or less.

10. The method for manufacturing a display device according to claim 1, wherein the photocurable resin is a UV curable resin.

11. The method for manufacturing a display device according to claim 1, wherein the photocurable resin includes a siloxane resin.

12. A display device, comprising: a display panel; and a coating form body disposed on the display panel and including a first substance, the outer surface of the coating form body includes: a back surface adjacent to the display panel; a front surface opposite to the back surface in the thickness direction; and a side surface with a first radius of curvature of 0.1 mm or more and 5 mm or less at least in part from the front surface towards the back surface, the first substance includes a photocurable resin.

13. The display device according to claim 12, wherein the front surface of the coating form body includes a transmission area and a border area adjacent to the transmission area, the coating form body includes a first part overlapping with the transmission area and a second part overlapping with the border area.

14. The display device according to claim 13, wherein, the first part includes the first substance, the second part includes the first substance and a second substance, and the second substance is a substance obtained by over-curing the first substance or a substance obtained by carbonizing the first substance.

15. The display device according to claim 13, wherein, the display device further includes: a light-shielding layer disposed under the second part and including a light-shielding substance.

16. The display device according to claim 12, wherein, the first substance includes a UV curable resin.

17. The display device according to claim 12, wherein, the first substance includes a photocurable siloxane resin.

18. The display device according to claim 12, wherein, the surface roughness of the side surface is the same as the surface roughness of the front surface or the back surface.

19. The display device according to claim 12, wherein, the side surface of the coating form is convex in cross-section compared to the side surface of the display panel.

20. The display device according to claim 12, wherein, the display device further includes: an optical layer disposed between the coating form and the display panel.

Images