KR20230140312A - Display Device And Electronic Device Including the Same - Google Patents

Abstract

A display device according to an embodiment of the present disclosure includes a display panel, and a window disposed on the display panel and defined with a bendable area that can be bent and a flat area that remains flat, wherein the window comprises a base layer and a first hard coating layer disposed on one side of the base layer and including a plurality of coating parts having different hardnesses, wherein the thickness of the first hard coating layer provided on the flat area can be thicker than the thickness of the first hard coating layer provided on the bending area.

Description

Display device and electronic device including the same {Display Device And Electronic Device Including the Same}

Various embodiments of the present disclosure relate to a display device comprised of a flexible display and an electronic device including the same.

Recently, interest in bendable electronic devices (hereinafter referred to as flexible electronic devices), including bendable display devices (hereinafter referred to as flexible display devices), is increasing. It can be said that it is essential for window members used in flexible display devices to have not only impact resistance due to surface hardness or strength, but also flexibility to prevent deformation when bending or folding.

In various embodiments of the present disclosure, a window of a display device may be configured by applying coating parts having different hardnesses in order to secure flexibility while improving the impact resistance of a bending portion vulnerable to external shock in a flexible display device.

A display device according to an embodiment of the present disclosure includes a display panel; and a window disposed on the display panel, wherein a bendable area that can be bent and a flat area that remain flat are defined, wherein the window includes: a base layer; and a first hard coating layer disposed on one surface of the base layer and including a plurality of coating parts having different hardnesses, wherein the thickness of the first hard coating layer provided on the planar area is on the bending area. It may be thicker than the thickness of the first hard coating layer provided.

An electronic device according to an embodiment of the present disclosure includes a bendable housing configured to facilitate bending along a bending axis; and a display panel, a window disposed on the display panel, and a protective layer disposed on the window, defining a bendable area that can be bent and a flat area that remains flat, and comprising a flexible display accommodated in the housing; , the window is a base layer; and a first hard coating layer disposed on one surface of the base layer and including a plurality of coating parts having different hardnesses, wherein the thickness of the first hard coating layer provided on the planar area is on the bending area. It may be thicker than the thickness of the first hard coating layer provided.

According to various embodiments proposed in the present disclosure, a display device can improve bending performance of a curved portion by differentially forming the thickness of the hard coating layer of the window.

According to various embodiments proposed in the present disclosure, impact resistance of a display device may be improved by stacking coatings with different hardnesses on a hard coating layer of a window.

The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned are common knowledge in the technical field to which the exemplary embodiments of the present disclosure belong from the following description. It can be clearly derived and understood by those who have it. That is, unintended effects resulting from implementing the exemplary embodiments of the present disclosure may also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

1 is a block diagram of an electronic device in a network environment, according to various embodiments.
FIG. 2 is a diagram illustrating an unfolded state of an electronic device according to various embodiments of the present disclosure.
FIG. 3 is a diagram illustrating a folded state of an electronic device according to various embodiments of the present disclosure.
FIG. 4 is a perspective view illustrating an example of a fully unfolded state or a partially unfolded intermediate state of an electronic device, according to various embodiments of the present disclosure.
5 is a cross-sectional view of a display device according to various embodiments of the present disclosure.
Figure 6 is a top view of the window of Figure 5.
FIG. 7 is a cross-sectional view taken along line VII-VII' of FIG. 6.
FIG. 8 is a cross-sectional view taken along line VIII-VIII' of FIG. 6.
9 and 10 are diagrams for explaining a window according to another embodiment of the present disclosure.
11 to 19 are diagrams for explaining windows with a vertical stacked structure according to various embodiments of the present disclosure.
FIG. 20 is a diagram for explaining the function of a window with a vertical stacked structure according to various embodiments of the present disclosure.
21 to 23 are diagrams for explaining a window with a buried structure according to various embodiments of the present disclosure.
FIGS. 24 to 28 are diagrams for explaining a window structure applied to a rollable display device according to various embodiments of the present disclosure.
Figure 29 is a flowchart showing a method of manufacturing a horizontal stacked structure among windows according to various embodiments of the present disclosure.
30A to 30C are diagrams for explaining an example of a method of manufacturing a horizontal stacked structure among windows according to various embodiments of the present disclosure.
FIG. 31 is a diagram illustrating an example of a method of manufacturing a vertically stacked structure among windows according to various embodiments of the present disclosure.
FIGS. 32A to 32C are diagrams for explaining an example of a method of manufacturing a vertically stacked structure among windows according to various embodiments of the present disclosure.
Figure 33 is a flowchart showing a process of applying a coating on the base layer of a window according to various embodiments of the present disclosure.
In the following description, reference is made to the accompanying drawings, and specific examples of how they may be practiced are shown by way of example in the drawings. Additionally, other examples may be used and structural changes may be made without departing from the scope of the various examples.

Hereinafter, with reference to the drawings, embodiments of the present disclosure will be described in detail so that those skilled in the art can easily practice them. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. In relation to the description of the drawings, identical or similar reference numerals may be used for identical or similar components. Additionally, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and brevity.

Hereinafter, various embodiments of this document may be described with reference to the attached drawings.

1 is a block diagram of an electronic device 101 in a network environment 100, according to various embodiments.

Referring to FIG. 1, in the network environment 100, the electronic device 101 communicates with the electronic device 102 through a first network 198 (e.g., a short-range wireless communication network) or a second network 199. It is possible to communicate with the electronic device 104 or the server 108 through (e.g., a long-distance wireless communication network). According to one embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108. According to one embodiment, the electronic device 101 includes a processor 120, a memory 130, an input module 150, an audio output module 155, a display module 160, an audio module 170, and a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or may include an antenna module 197. In some embodiments, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added to the electronic device 101. In some embodiments, some of these components (e.g., sensor module 176, camera module 180, or antenna module 197) are integrated into one component (e.g., display module 160). It can be.

The processor 120, for example, executes software (e.g., program 140) to operate at least one other component (e.g., hardware or software component) of the electronic device 101 connected to the processor 120. It can be controlled and various data processing or calculations can be performed. According to one embodiment, as at least part of data processing or computation, the processor 120 stores commands or data received from another component (e.g., sensor module 176 or communication module 190) in volatile memory 132. The commands or data stored in the volatile memory 132 can be processed, and the resulting data can be stored in the non-volatile memory 134. According to one embodiment, the processor 120 includes a main processor 121 (e.g., a central processing unit or an application processor) or an auxiliary processor 123 that can operate independently or together (e.g., a graphics processing unit, a neural network processing unit ( It may include a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device 101 includes a main processor 121 and a secondary processor 123, the secondary processor 123 may be set to use lower power than the main processor 121 or be specialized for a designated function. You can. The auxiliary processor 123 may be implemented separately from the main processor 121 or as part of it.

The auxiliary processor 123 may, for example, act on behalf of the main processor 121 while the main processor 121 is in an inactive (e.g., sleep) state, or while the main processor 121 is in an active (e.g., application execution) state. ), together with the main processor 121, at least one of the components of the electronic device 101 (e.g., the display module 160, the sensor module 176, or the communication module 190) At least some of the functions or states related to can be controlled. According to one embodiment, co-processor 123 (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module 180 or communication module 190). there is. According to one embodiment, the auxiliary processor 123 (eg, neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. Artificial intelligence models can be created through machine learning. For example, such learning may be performed in the electronic device 101 itself, where artificial intelligence is performed, or may be performed through a separate server (e.g., server 108). Learning algorithms may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but It is not limited. An artificial intelligence model may include multiple artificial neural network layers. Artificial neural networks include deep neural network (DNN), convolutional neural network (CNN), recurrent neural network (RNN), restricted boltzmann machine (RBM), belief deep network (DBN), bidirectional recurrent deep neural network (BRDNN), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the examples described above. In addition to hardware structures, artificial intelligence models may additionally or alternatively include software structures.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101. Data may include, for example, input data or output data for software (e.g., program 140) and instructions related thereto. Memory 130 may include volatile memory 132 or non-volatile memory 134.

The program 140 may be stored as software in the memory 130 and may include, for example, an operating system 142, middleware 144, or application 146.

The input module 150 may receive commands or data to be used in a component of the electronic device 101 (e.g., the processor 120) from outside the electronic device 101 (e.g., a user). The input module 150 may include, for example, a microphone, mouse, keyboard, keys (eg, buttons), or digital pen (eg, stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101. The sound output module 155 may include, for example, a speaker or a receiver. Speakers can be used for general purposes such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The display module 160 can visually provide information to the outside of the electronic device 101 (eg, a user). The display module 160 may include, for example, a display, a hologram device, or a projector, and a control circuit for controlling the device. According to one embodiment, the display module 160 may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of force generated by the touch.

The audio module 170 can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module 170 acquires sound through the input module 150, the sound output module 155, or an external electronic device (e.g., directly or wirelessly connected to the electronic device 101). Sound may be output through the electronic device 102 (e.g., speaker or headphone).

The sensor module 176 detects the operating state (e.g., power or temperature) of the electronic device 101 or the external environmental state (e.g., user state) and generates an electrical signal or data value corresponding to the detected state. can do. According to one embodiment, the sensor module 176 includes, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, humidity sensor, or light sensor.

The interface 177 may support one or more designated protocols that can be used to connect the electronic device 101 directly or wirelessly with an external electronic device (eg, the electronic device 102). According to one embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102). According to one embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 can convert electrical signals into mechanical stimulation (e.g., vibration or movement) or electrical stimulation that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 can capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 can manage power supplied to the electronic device 101. According to one embodiment, the power management module 188 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101. According to one embodiment, the battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

Communication module 190 is configured to provide a direct (e.g., wired) communication channel or wireless communication channel between electronic device 101 and an external electronic device (e.g., electronic device 102, electronic device 104, or server 108). It can support establishment and communication through established communication channels. Communication module 190 operates independently of processor 120 (e.g., an application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (e.g., : LAN (local area network) communication module, or power line communication module) may be included. Among these communication modules, the corresponding communication module is a first network 198 (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (e.g., legacy It may communicate with an external electronic device 104 through a telecommunication network such as a cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or WAN). These various types of communication modules may be integrated into one component (e.g., a single chip) or may be implemented as a plurality of separate components (e.g., multiple chips). The wireless communication module 192 uses subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199. The electronic device 101 can be confirmed or authenticated.

The wireless communication module 192 may support 5G networks after 4G networks and next-generation communication technologies, for example, NR access technology (new radio access technology). NR access technology provides high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low latency). -latency communications)) can be supported. The wireless communication module 192 may support high frequency bands (eg, mmWave bands), for example, to achieve high data rates. The wireless communication module 192 uses various technologies to secure performance in high frequency bands, for example, beamforming, massive array multiple-input and multiple-output (MIMO), and full-dimensional multiplexing. It can support technologies such as input/output (FD-MIMO: full dimensional MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module 192 may support various requirements specified in the electronic device 101, an external electronic device (e.g., electronic device 104), or a network system (e.g., second network 199). According to one embodiment, the wireless communication module 192 supports Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mmTC, or U-plane latency (e.g., 164 dB or less) for realizing URLLC. Example: Downlink (DL) and uplink (UL) each of 0.5 ms or less, or round trip 1 ms or less) can be supported.

The antenna module 197 may transmit signals or power to or receive signals or power from the outside (e.g., an external electronic device). According to one embodiment, the antenna module 197 may include an antenna including a radiator made of a conductor or a conductive pattern formed on a substrate (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected to the plurality of antennas by, for example, the communication module 190. can be selected Signals or power may be transmitted or received between the communication module 190 and an external electronic device through the at least one selected antenna. According to some embodiments, in addition to the radiator, other components (eg, radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module 197.

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, a mmWave antenna module includes: a printed circuit board, an RFIC disposed on or adjacent to a first side (e.g., bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., mmWave band); And a plurality of antennas (e.g., array antennas) disposed on or adjacent to the second side (e.g., top or side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (e.g., bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal ( (e.g. commands or data) can be exchanged with each other.

According to one embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199. Each of the external electronic devices 102 or 104 may be of the same or different type as the electronic device 101. According to one embodiment, all or part of the operations performed in the electronic device 101 may be executed in one or more of the external electronic devices 102, 104, or 108. For example, when the electronic device 101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 101 may perform the function or service instead of executing the function or service on its own. Alternatively, or additionally, one or more external electronic devices may be requested to perform at least part of the function or service. One or more external electronic devices that have received the request may execute at least part of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device 101. The electronic device 101 may process the result as is or additionally and provide it as at least part of a response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology can be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an Internet of Things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199. The electronic device 101 may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

FIG. 2 is a diagram illustrating an unfolded state of the electronic device 200 according to various embodiments of the present disclosure. FIG. 3 is a diagram illustrating a folded state of the electronic device 200 according to various embodiments of the present disclosure. FIG. 4 is a perspective view illustrating an example of the electronic device 200 in a fully unfolded state or a partially unfolded intermediate state, according to various embodiments of the present disclosure.

The electronic device 200 of FIGS. 2 to 4 is an example of the electronic device 101 shown in FIG. 1 and may be a foldable or bendable electronic device.

The drawings of FIG. 4 and below show a spatial coordinate system defined by the X-axis, Y-axis, and Z-axis orthogonal to each other. Here, the X-axis may represent the width direction of the electronic device, the Y-axis may represent the length direction of the electronic device, and the Z-axis may represent the height (or thickness) direction of the electronic device. In the following description, the 'first direction' may mean a direction parallel to the Z-axis.

2 and 3, in one embodiment, the electronic device 200 includes a foldable housing 201 (or bendable housing), and a flexible housing disposed in a space formed by the foldable housing 201. It may include a flexible or foldable display 250 (hereinafter, “display” 250) (e.g., the display device 160 of FIG. 1). According to one embodiment, the surface on which the display 250 is placed (or the surface on which the display 250 is visible from the outside of the electronic device 200) may be defined as the front of the electronic device 200. Additionally, the opposite side of the front side may be defined as the back side of the electronic device 200. Additionally, the surface surrounding the space between the front and back can be defined as the side of the electronic device 200.

According to various embodiments, the foldable housing 201 includes a first housing structure 210, a second housing structure 220 including a sensor area 222, a first rear cover 215, and a second housing structure. It may include a rear cover 225 and a hinge structure 230. Here, the hinge structure 230 may include a hinge cover that covers the foldable portion of the foldable housing 201. The foldable housing 201 of the electronic device 200 is not limited to the shape and combination shown in FIGS. 2 and 3 and may be implemented by combining and/or combining other shapes or parts. For example, in another embodiment, the first housing structure 210 and the first rear cover 215 may be formed integrally, and the second housing structure 220 and the second rear cover 225 may be formed integrally. can be formed.

According to various embodiments, the first housing structure 210 is connected to the hinge structure 230 and includes a first side facing in a first direction and a second side facing in a second direction opposite the first direction. can do. The second housing structure 220 is connected to the hinge structure 230 and may include a third side facing a third direction, and a fourth side facing a fourth direction opposite to the third direction. The second housing structure 220 can rotate relative to the first housing structure 210 about the hinge structure 230 . The electronic device 200 can change to a folded state or an unfolded state.

According to one embodiment, the first side of the electronic device 200 may face the third side in a fully folded state, and the third direction may face the third side in a fully unfolded state. It may be the same as the first direction.

According to various embodiments, the first housing structure 210 and the second housing structure 220 are disposed on both sides about the folding axis A (or bending axis) and are generally symmetrical with respect to the folding axis A. It can have a shape. As will be described later, the first housing structure 210 and the second housing structure 220 are configured to determine whether the electronic device 200 is in an unfolded state, a folded state, or is partially unfolded (or The angle or distance between them may vary depending on whether they are in an intermediate state (partially folded). According to one embodiment, the second housing structure 220, unlike the first housing structure 210, additionally includes the sensor area 222 where various sensors are disposed, but has a mutually symmetrical shape in other areas. You can have In another embodiment, the sensor area 222 may be additionally disposed or replaced in at least a partial area of the second housing structure 220. For example, the sensor area 222 may include a camera hall area, a sensor hall area, an under display camera (UDC) area, and an under display sensor (UDS) area.

According to various embodiments, as shown in FIG. 2 , the first housing structure 210 and the second housing structure 220 may together form a recess that accommodates the display 250 . According to one embodiment, due to the sensor area 222, the recess may have two or more different widths in a direction perpendicular to the folding axis (A). According to one embodiment, the recess is formed at the edge of the first portion 210a parallel to the folding axis A of the first housing structure 210 and the sensor area 222 of the second housing structure 220. It may have a first width w1 between the first part 220a, and the recess is located between the second part 210b of the first housing structure 210 and the sensor area of the second housing structure 220. It may have a second width w2 formed by the second portion 220b that does not correspond to 222 and is parallel to the folding axis A. In this case, the second width w2 may be formed to be longer than the first width w1. According to one embodiment, the first part 220a and the second part 220b of the second housing structure 220 may have different distances from the folding axis A. The width of the recess is not limited to the illustrated example. In another embodiment, the recess may have multiple widths due to the shape of the sensor area 222 or the asymmetrically shaped portion of the first housing structure 210 and the second housing structure 220. According to various embodiments, the sensor area 222 may be formed to have a predetermined area adjacent to one corner of the second housing structure 220. However, the arrangement, shape, and size of the sensor area 222 are not limited to the illustrated example. For example, in other embodiments, the sensor area 222 may be provided at another corner of the second housing structure 220 or at any area between the top and bottom corners. In one embodiment, components for performing various functions built into the electronic device 200 are electronically transmitted through the sensor area 222 or through one or more openings provided in the sensor area 222. It may be exposed to the front of the device 200. In various embodiments, the components may include various types of sensors. The sensor may include, for example, at least one of a front camera, a receiver, or a proximity sensor. According to various embodiments, the sensor area 222 may be omitted from the second housing structure 220 or may be formed in a location different from that shown in the drawing.

According to various embodiments, at least a portion of the first housing structure 210 and the second housing structure 220 may be formed of a metallic material or a non-metallic material having a selected level of rigidity to support the display 250. . At least a portion formed of the metal material may provide a ground plane of the electronic device 200 and may be electrically connected to a ground line formed on a printed circuit board disposed inside the foldable housing 201. can be connected

According to various embodiments, the first rear cover 215 is disposed on one side of the folding axis A on the rear of the electronic device 200 and has, for example, a substantially rectangular periphery. It may have, and the edge may be surrounded by the first housing structure 210. Similarly, the second rear cover 225 may be disposed on the other side of the folding axis A on the back of the electronic device 200, and its edge may be wrapped by the second housing structure 220. .

According to various embodiments, the first rear cover 215 and the second rear cover 225 may have a substantially symmetrical shape about the folding axis (A). However, the first rear cover 215 and the second rear cover 225 do not necessarily have symmetrical shapes, and in other embodiments, the electronic device 200 includes the first rear cover 215 and the second rear cover 225 of various shapes. It may include a second rear cover 225. In another embodiment, the first back cover 215 may be formed integrally with the first housing structure 210, and the second back cover 225 may be formed integrally with the second housing structure 220. there is.

According to various embodiments, the first back cover 215, the second back cover 225, the first housing structure 210, and the second housing structure 220 are various components of the electronic device 200 ( It can form a space where a printed circuit board, or battery) can be placed. According to one embodiment, one or more components may be placed or visually exposed on the rear of the electronic device 200. For example, at least a portion of the sub-display may be visually exposed through the first rear area 216 of the first rear cover 215. In another embodiment, one or more components or sensors may be visually exposed through the second rear area 226 of the second rear cover 225. In various embodiments, the sensor may include a proximity sensor and/or a rear camera.

According to various embodiments, the front camera or the second rear area 226 of the second rear cover 225 is exposed to the front of the electronic device 200 through one or more openings provided in the sensor area 222. The rear camera exposed through may include one or more lenses, an image sensor, and/or an image signal processor. Flashes may include, for example, light-emitting diodes or xenon lamps. In some embodiments, two or more lenses (an infrared camera, a wide-angle and a telephoto lens) and image sensors may be placed on one side of the electronic device 200.

Referring to FIG. 3 , the hinge cover may be disposed between the first housing structure 210 and the second housing structure 220 and configured to cover internal components (eg, the hinge structure 230). According to one embodiment, the hinge structure 230 is a first housing structure depending on the state (unfolded status, intermediate status, or folded status) of the electronic device 200. It may be obscured by part of 310 and the second housing structure 320, or may be exposed to the outside.

According to one embodiment, as shown in FIG. 2, when the electronic device 200 is in an unfolded state (e.g., fully unfolded state), the hinge structure 230 is a first housing structure ( 210) and may be obscured by the second housing structure 220 and not exposed. As another example, as shown in FIG. 3, when the electronic device 200 is in a folded state (e.g., fully folded state), the hinge structure 230 is the first housing structure 210. and may be exposed to the outside between the second housing structure 220. As another example, when the first housing structure 210 and the second housing structure 220 are in an intermediate state, folded with a certain angle, the hinge structure 230 is folded with a certain angle. A portion may be exposed to the outside between the structure 210 and the second housing structure 220. However, in this case, the exposed area may be less than in the fully folded state. In one embodiment, hinge structure 230 may include a curved surface.

According to various embodiments, the display 250 may be arranged in the space formed by the foldable housing 201. For example, the display 250 is seated in a recess formed by the foldable housing 201 and can be viewed from the outside through the front of the electronic device 200. For example, the display 250 may constitute most of the front of the electronic device 200. Accordingly, the front of the electronic device 200 may include the display 250 and a partial area of the first housing structure 210 adjacent to the display 250 and a partial area of the second housing structure 220. And, the rear of the electronic device 200 includes a first rear cover 215, a partial area of the first housing structure 210 adjacent to the first rear cover 215, a second rear cover 225, and a second rear cover. It may include a portion of the second housing structure 220 adjacent to 225 .

According to various embodiments, the display 250 may refer to a display in which at least some areas can be transformed into a flat or curved surface. According to one embodiment, the display 250 has a folding area 253, a first area disposed on one side (e.g., the left side of the folding area 253 shown in FIG. 2) with respect to the folding area 253. 251) and a second area 252 disposed on the other side (e.g., on the right side of the folding area 253 shown in FIG. 2).

However, the division of areas of the display 250 shown in FIG. 2 is exemplary, and the display 250 may be divided into a plurality of areas (e.g., four or more or two) depending on the structure or function. . For example, in the embodiment shown in FIG. 2, the area of the display 250 may be divided by a folding area 253 extending parallel to the folding axis A, but in another embodiment, the display 250 Regions may also be divided based on different folding axes (e.g., a folding axis parallel to the width direction of the electronic device).

According to various embodiments of the present disclosure, the display 250 may be combined with or disposed adjacent to a touch panel equipped with a touch detection circuit and a pressure sensor capable of measuring the intensity (pressure) of a touch. For example, the display 250 is an example of a touch panel and may be combined with or disposed adjacent to a touch panel that detects an electromagnetic resonance (EMR) type stylus pen.

According to various embodiments, the first area 251 and the second area 252 may have an overall symmetrical shape with the folding area 253 as the center. However, the second area 252, unlike the first area 251, may include a notch cut depending on the presence of the sensor area 222, but in other areas, the first area 252 It may have a symmetrical shape with the area 251. In other words, the first region 251 and the second region 252 may include a portion having a symmetrical shape and a portion having an asymmetrical shape.

According to various embodiments, the edge thickness of the first area 251 and the second area 252 may be formed to be different from the edge thickness of the folding area 253. The edge thickness of the folding area 253 may be thinner than the thickness of the first area 251 and the second area 252 . In terms of thickness, the first area 251 and the second area 252 may have an asymmetric shape when viewed in cross section. For example, the edge of the first area 251 may be formed to have a first radius of curvature, and the edge of the second area 252 may be formed to have a second radius of curvature that is different from the first radius of curvature. . In another embodiment, the first area 251 and the second area 252 may have a symmetrical shape in terms of thickness when the first area 251 and the second area 252 are viewed in cross section. This will be described in detail later through the embodiment disclosed in the drawings below FIG. 10A.

Hereinafter, the first housing structure 210 and the second housing structure 220 according to the state (e.g., folded status, unfolded status, or intermediate status) of the electronic device 200. ) operation and each area of the display 250 will be explained.

According to various embodiments, when the electronic device 200 is in an unfolded state (e.g., Figure 2), the first housing structure 210 and the second housing structure 220 form an angle of 180 degrees and are the same. It can be placed to face the direction. The surface of the first area 251 and the surface of the second area 252 of the display 250 form an angle of 180 degrees and may face the same direction (eg, the front direction of the electronic device). The folding area 253 may form the same plane as the first area 251 and the second area 252 . In another embodiment, when the electronic device 200 is in a flat state, the first housing structure 210 and the second housing structure 220 rotate at a predetermined angle (e.g., 360 degrees) with respect to each other. By folding the first back cover 215 and the second back cover 225 in opposite directions to face each other, the first area 251 and the second area 252 of the display may be arranged to face opposite directions with respect to each other.

According to various embodiments, when the electronic device 200 is in a folded state (e.g., Figure 3), the first housing structure 210 and the second housing structure 220 may be arranged to face each other. there is. The surface of the first area 251 and the surface of the second area 252 of the display 250 form a narrow angle (eg, between 0 degrees and 10 degrees) and may face each other. At least a portion of the folding area 253 may be formed as a curved surface with a predetermined curvature.

According to various embodiments, when the electronic device 200 is in an intermediate state, the first housing structure 210 and the second housing structure 220 are arranged at a certain angle to each other. You can. The surface of the first area 251 and the surface of the second area 252 of the display 250 may form an angle that is larger than that in the folded state and smaller than that in the unfolded state. At least a portion of the folding area 253 may be made of a curved surface with a predetermined curvature, and the curvature at this time may be smaller than that in the folded state.

(a) of FIG. 4 may represent a fully unfolded state of the electronic device 200, and (b) of FIG. 4 may represent an intermediate state in which the electronic device 200 is partially unfolded. As described above, the electronic device 200 can change to a folded state or an unfolded state. According to one embodiment, the electronic device 200 is folded so that the front of the electronic device 200 forms an acute angle when viewed from the folding axis direction (e.g., A-axis in FIG. 2). It can be folded in two ways: 'and 'out-folding', in which the front of the electronic device 200 is folded to form an obtuse angle. For example, the electronic device 200 may be in an in-folded state where the first side of the first housing structure 210 faces the third side of the second housing structure 220. In the fully unfolded state, the first side of the first housing structure 210 and the third side of the second housing structure 220 face the same direction (e.g., a direction parallel to the Z axis). You can.

For another example, the second side of the first housing structure 210 may face the fourth side of the second housing structure 220 when the electronic device 200 is folded in an out-folding manner.

In addition, the electronic device 200, although not shown in the drawing, may include a plurality of hinge axes (e.g., two parallel hinge axes including the A-axis in FIG. 2 and another axis parallel to the A-axis), In this case, the electronic device 200 may be folded in a 'multi-folding' method that combines the in-folding and out-folding methods. For example, a plurality of hinge axes may all be arranged in the same direction. As another example, some of the hinge axes among the plurality of hinge axes may be arranged in different directions and folded. In addition, although not shown in the drawing, the hinge axis may be formed in a vertical direction or a horizontal direction (e.g., a direction perpendicular to the A axis of FIG. 2) when the electronic device 200 is viewed from above, but is not limited thereto. Yes. For example, the hinge axis may be formed in a diagonal direction.

The in folding type may mean a state in which the display 250 is not exposed to the outside in a fully folded state. The out folding type may mean a state in which the display 250 is exposed to the outside in a fully folded state. Figure 4(b) shows an intermediate state in which the electronic device 200 is partially unfolded during the in-folding process.

For convenience, the following description will focus on the state in which the electronic device 200 is folded in an in-folding manner. However, these descriptions also apply to the state in which the electronic device 200 is folded in an out-folding manner. Please note that this can happen.

5 is a cross-sectional view of a display device according to various embodiments of the present disclosure.

Referring to FIG. 5, a display device 500 (e.g., display 250 of FIG. 2) according to various embodiments of the present disclosure includes a display panel 510, an input detection unit 520, a window 530, It may include a protective layer 540, an anti-reflection layer 550, or an adhesive layer 560.

According to one embodiment, the display panel 510 may be provided to display an image. The display panel 510 may be, for example, an emissive display panel, but is not limited thereto. The display panel 510 may be, for example, an organic 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. The light emitting layer of the quantum dot light emitting display panel may include quantum dots and quantum rods. Hereinafter, the display panel 510 will be described as an organic light emitting display panel.

According to one embodiment, the display panel 510 may be a flexible display panel. Accordingly, the display panel 510 may be rolled as a whole, or may be folded or unfolded about a folding axis (eg, folding axis A in FIG. 2).

According to one embodiment, the input detection unit 520 may be placed directly on the display panel 510. For example, the input sensing unit 520 may be formed on the display panel 510 through a continuous process. That is, when the input sensing unit 520 is placed directly on the display panel 510, the adhesive film may not be disposed between the input sensing unit 520 and the display panel 510, but is not limited to this. When an adhesive film is disposed between the input sensing unit 520 and the display panel 510, the input sensing unit 520 is not manufactured through a continuous process with the display panel 510 and is manufactured separately from the display panel 510. After being manufactured through the process, it may be fixed to the upper surface of the display panel 510 with an adhesive film. According to another embodiment, the input sensing unit 520 may be patterned below the polarization layer or above the encapsulation layer of the display panel 510, or may be disposed on an internal thin film transistor (TFT) substrate of the display panel 510.

According to one embodiment, the display panel 510 can generate an image, and the input detection unit 520 can obtain coordinate information about a user's input (eg, a touch event).

According to one embodiment, the window 530 may be disposed on the display panel 510 or the input detection unit 520. Window 530 may include an optically transparent insulating material. Accordingly, the image generated on the display panel 510 can be easily transmitted to the user through the window 530.

According to one embodiment, the window 530 may include a glass substrate or a synthetic resin film. If the window 530 is thin film glass, for example, the thickness of the window 530 is 80 It may be less than m. If the window 530 is a synthetic resin film, for example, the window 530 may include a polyimide (PI) film or a polyethylene terephthalate (PET) film.

According to one embodiment, the window 530 transmits the image from the display panel 510 and alleviates external shocks, thereby preventing the display panel 510 from being damaged or malfunctioning due to external shocks. there is. Here, external impact may refer to a force applied from the outside, such as pressure or stress, that causes damage to the display panel 510 or the input detection unit 520.

According to one embodiment, the protective layer 540 may be disposed on the window 530. The protective layer 540 may be provided, for example, to improve the impact resistance of the window 530 and prevent scattering when broken. The protective layer 540 may include at least one selected from urethane-based resin, epoxy-based resin, polyester-based resin, polyether-based resin, acrylate-based resin, ABS resin (acrylonitrile-butadiene-styrene resin), and rubber. . As an example, the protective layer 540 is made of at least one of phenylene, polyethylene terephthalate, polyimide, polyamide (PAI), polyethylene naphthalate (PEN), and polycarbonate (PC). may include.

According to one embodiment, the anti-reflection layer 550 may be disposed between the display panel 510 and the window 530. One or more functional layers may be disposed between the display panel 510 and the window 530, and an anti-reflection layer 550 may be disposed as one of them. The anti-reflection layer 550 can prevent the problem of elements constituting the display panel 510 being visible from the outside due to external light incident through the front of the display device 500. The anti-reflection layer 550 may include, for example, a phase retarder and a polarizer. The phase retarder may be a film type or a liquid crystal coating type, /2 phase retardant and/or /4 may include a phase retardant. The polarizer may also be a film type or a liquid crystal coating type. The film type may include, for example, a stretched synthetic resin film. The liquid crystal coating type may include, for example, liquid crystals arranged in a predetermined arrangement. For example, the phase retarder and the polarizer may be implemented as a single polarizing film. A protective film may be disposed on or below the anti-reflection layer 550 as a functional layer.

According to one embodiment, the anti-reflection layer 550 may be disposed on the input sensing unit 520. That is, the anti-reflection layer 550 may be disposed between the input sensing unit 520 and the window 530. The anti-reflection layer 550 and the window 530 may be coupled to each other through an adhesive layer 560. Although not shown, an adhesive film may be further disposed between the input sensing unit 520 and the anti-reflection layer 550. The adhesive layer 560 may include, for example, an optically clear adhesive film (OCA). However, the adhesive layer 560 is not limited to this and may include a conventional adhesive or adhesive. As an example, the adhesive layer 560 may include an optically clear adhesive resin (OCR) or a pressure sensitive adhesive film (PSA).

According to one embodiment, the display device 500 may further include a support plate 570 disposed on the display panel 510 to support the display panel 510 . Support plate 570 may be, for example, a metal plate or stainless steel plate. The strength of the support plate 570 may be greater than that of the display panel 510.

According to one embodiment, the support plate 570 may include a number of support plates 570 corresponding to the planar area 501 . For example, as shown, the support plate 570 is disposed at a position corresponding to the first planar area 501a, and the first support plate 570a is disposed at a position corresponding to the second planar area 501b. A second support plate 570b may be disposed. The first support plate 570a and the second support plate 570b may be arranged to be spaced apart. The portion where the first support plate 570a and the second support plate 570b are spaced apart may correspond to at least a portion of the bending area 502 (eg, the folding area 253 in FIG. 2 ).

Figure 6 is a top view of the window of Figure 5. FIG. 7 is a cross-sectional view taken along line VII-VII' of FIG. 6. FIG. 8 is a cross-sectional view taken along line VIII-VIII' of FIG. 6.

Referring to FIGS. 6 to 8 , the window 600 (eg, window 530 in FIG. 5 ) may include a base layer 610 or a coating layer 620 disposed around the base layer 610 . According to one embodiment, the window 600 may be defined by at least one bending area 602 and at least one planar area 601. The bending area 602 of the window 600 may correspond to the bending area (e.g., the folding area 253 of FIG. 2) of a display device (e.g., the display 250 of FIG. 2), and the bending area of the window 600 may correspond to the bending area 602 of the window 600. The flat area 601 may correspond to a flat area of the display device 250 (eg, the first area 251 or the second area 252 in FIG. 2 ). The bending area 602 and the flat area 601 of the window 600 are the bending area (e.g., folding area 253) and the flat area (e.g., the first area 251 or the second area) of the display device 250. The explanation for (252)) can be applied equally. For convenience of explanation, the configuration of the refractive index matching unit 630 is omitted in FIG. 7.

According to one embodiment, the base layer 610 may include a transparent material. The base layer 610 may include, for example, glass, tempered glass, or a synthetic resin film. Base layer 610 may be, for example, a chemically strengthened glass substrate. When the base layer 610 is a chemically strengthened glass substrate, mechanical strength can be increased while being thin, and it can be used as a window for a flexible display. When the base layer 610 includes a synthetic resin film, the base layer 610 may include a polyimide film or a polyethylene terephthalate film. The base layer 610 may be made of, for example, a soft material.

According to one embodiment, the base layer 610 of the window 600 may have a multi-layer structure or a single-layer structure. For example, the base layer 610 may have a structure in which a plurality of synthetic resin films are bonded through an adhesive member, or it may have a structure in which a glass substrate and a synthetic resin film are bonded together with an adhesive.

The thickness of the base layer 610 is, for example, 20 m to 60 It may be m. The thickness of the base layer 610 is preferably 20 m to 40 It may be m.

According to one embodiment, the first hard coating layer 621 may be disposed on the upper surface of the base layer 610. According to one embodiment, the first hard coating layer 621 may include a plurality of coating parts having different hardnesses. According to one embodiment, the first hard coating layer 621 may include a first coating portion 621a having a first hardness and a second coating portion 621b having a second hardness that is different from the first hardness. there is. That is, the first hardness may be larger or smaller than the second hardness. The first hard coating layer 621 may be a layer that protects the base layer 610 from external shock.

According to one embodiment, the thickness of the first hard coating layer 621 in the bending area 602 may be thinner than the thickness of the first hard coating layer 621 in the planar area 601. That is, the first hard coating layer 621 may be provided in the form of a groove at a position corresponding to the bending area 602. At the portion where the bending area 602 and the flat area 601 come into contact, the first hard coating layer 621 may be formed to be stepped. By configuring the thickness of the first hard coating layer 621 in the portion corresponding to the bending area 602 to be thinner than the thickness of the first hard coating layer 621 in the portion corresponding to the flat area 601, the window 600 is larger. Can be easily bent.

According to one embodiment, the thickness of the first hard coating layer 621 in the bending area 602 is 50 It may be less than m. In particular, the thickness of the first hard coating layer 621 in the bending area 602 is 10 to 30 It may be m.

According to one embodiment, one surface of the first hard coating layer 621 is in contact with one surface of the base layer 610, and one surface of the second coating part 621b is in contact with the first coating part 621a. ) can be in contact with the other side. For example, in the first hard coating layer 621, a first coating portion 621a is provided on the upper surface of the base layer 610, and a second coating portion 621b is provided on the upper surface of the first coating portion 621a. You can. When an impact is applied to the window 600 from the outside, the second coating part performs a primary buffering role, and the first coating part performs a secondary buffering role to prevent damage to the base layer 610, and even if damaged, the base layer (610) It can prevent fragments from scattering.

According to one embodiment, the first hard coating layer 621 may have a coating portion having a relatively small hardness provided on the upper surface of the base layer 610, and a coating portion having a relatively large hardness may be provided on the upper surface of the coating portion having a relatively small hardness. According to some embodiments, the first hard coating layer 621 may include a coating having a relatively high hardness provided on the upper surface of the base layer 610, and a coating having a relatively low hardness may be provided on the upper surface of the coating having a relatively high hardness.

Below, based on the illustrated embodiment, when the first coating portion 621a is provided on the upper surface of the base layer 610 and the second coating portion 621b is provided on the upper surface of the first coating portion 621a. Explain.

According to one embodiment, in the planar area 601, the thickness T1 of the first coating part 621a and the thickness T2 of the second coating part 621b may be substantially the same, but are not limited thereto. Substantially the same thickness means not only the case where the thickness is completely the same, but also the same in the range including differences that may occur due to errors in the process despite the same design. According to some embodiments, the thickness of the coating portion with relatively small hardness among the first coating portion 621a and the second coating portion 621b may occupy more than half of the total thickness of the first hard coating layer 621.

According to one embodiment, in the bending area 602, the thickness T1' of the first coating part 621a may be greater than the thickness T2' of the second coating part 621b. In addition, while the thickness (T1') of the first coating portion (621a) in the bending region (602) and the thickness (T1) of the first coating portion (621a) in the flat region (601) are substantially the same, the bending region ( The thickness T2' of the second coating portion 621b in 602 may be thinner than the thickness T2 of the second coating portion 621b in the planar area 601. As a result, the thickness of the first hard coating layer 621 in the bending area 602 may be thinner than the thickness of the first hard coating layer 621 in the flat area 601.

According to one embodiment, the first hardness may be less than or equal to 30 kpa, and the second hardness may be greater than 30 kpa, but are not limited thereto. Hereinafter, the materials of the first coating portion 621a and the second coating portion 621b will be described, taking the case where the second hardness is greater than the first hardness as an example. The first coating portion 621a may include a highly elongated polymer material with high elongation, and may have lower hardness than the second coating portion 621b. For example, the first coating portion 621a may have a lower modulus than the second coating portion 621b. The first coating portion 621a may include at least one of a urea-based material, a urethane-based material, an ester-based material, and an epoxy-based material. The first coating portion 621a may include at least one of polyurea, polyurethane, polyester, and polyepoxy.

According to one embodiment, each of the first coating part 621a and the second coating part 621b may include a siloxane compound. Each of the first coating portion 621a and the second coating portion 621b may include a siloxane compound as a main binder. According to one embodiment, each of the first coating portion 621a and the second coating portion 621b may include a material such as polymethylsiloxane and polydimethylsiloxane. According to one embodiment, the siloxane compound included in each of the first coating portion 621a and the second coating portion 621b may be a siloxane polymer compound or a siloxane oligomer derived from a siloxane monomer having a functional group such as an acrylate group at the terminal. there is. According to one embodiment, the siloxane compound may be a siloxane polymer formed by polymerizing silsesquioxane and siloxane monomer.

According to one embodiment, each of the first coating part 621a and the second coating part 621b may further include a filler. The filler may include any one of a sol containing inorganic particles, a nano silica sol, or a porous sol. The filler may be spherical and may have a substantially monodisperse size distribution. The average size of the plurality of particles included in the filler may be 10 nm to 50 nm. The average size of a plurality of particles included in the filler may represent the average diameter of the filler. For example, the average diameter of the plurality of particles included in the filler may be 10 nm or more and 30 nm or less. If the average size of a plurality of particles included in the filler exceeds 50 nm, the optical transparency of the coating portion may decrease. Additionally, if the average size of the plurality of particles included in the filler is less than 10 nm, the effect of improving surface hardness in the coating area may be reduced. A plurality of particles contained in the filler are, for example, Or it may be a combination thereof. In other words, the plurality of particles It may include at least one of the following. As an example, the composition of the coating part is surface treated May contain particles. Alternatively, the plurality of particles included in the filler may include nano-silica particles or porous inorganic particles.

According to one embodiment, each of the first coating portion 621a and the second coating portion 621b may further include at least one of an antifoaming agent and a leveling agent. The defoamer is a material with low surface tension and may be a material for removing air bubbles generated when forming the first coating portion 621a and the second coating portion 621b. Antifoaming agents may include, for example, siloxane-based materials. Antifoaming agents may include, for example, octamethylcyclotetrasiloxane. The leveler is a material with low surface tension, and improves the uniformity of the film when forming the first coating part 621a and the second coating part 621b, thereby forming the first coating part 621a and the second coating part 621b. It may be a material for improving membrane properties, that is, leveling properties. Leveling agents may include, for example, siloxane-based materials. The leveling agent may include, for example, dimethylsiloxane.

According to one embodiment, the side portion 6211 of the bending area 602 of the first hard coating layer 621 may be formed to be thinner than other portions. Here, the side portion 6211 of the bending region 602 may be a portion where the bending region 602 and the planar region 601 do not contact each other. For example, the side portion 6211 of the bending area 602 may decrease in thickness toward the end (or edge) of the side portion 6211 as shown. The side portion 6211 of the bending area 602 may be processed to be inclined, for example, in a diagonal direction. According to some embodiments, the side portion 6211 of the bending area 602 may be processed into a round shape. By thinning the side portion 6211 of the bending area 602, stress generated when bending the window 600 can be alleviated.

According to one embodiment, the window 600 may further include a refractive index matching part 630 disposed on the outer surface of the first hard coating layer 621. Here, the outer surface may refer to the surface furthest from the base layer 610. That is, in the illustrated embodiment, the refractive index matching unit 630 may be disposed on the upper surface of the first hard coating layer 621. For example, the refractive index matching unit 630 may be disposed at the top of the window 600 to form a flat top. For example, a protective layer (eg, protective layer 540 of FIG. 5 ) may be disposed on the refractive index matching unit 630 . The refractive index matching unit 630 may be provided, for example, to offset the step structure of the first hard coating layer 621 to which differential thicknesses are applied in the bending area 602 and the planar area 601. Additionally, the refractive index matching unit 630 can reduce visibility problems that may occur due to the step structure formed on the upper surface of the first hard coating layer 621. The refractive index matching unit 630 may be made of, for example, a transparent material. The refractive index matching unit 630 may be made of, for example, urethane-based, acrylic-based, or silicone-based.

According to one embodiment, the refractive index of the refractive index matching unit 630 may be substantially the same as the refractive index of the first hard coating layer 621. For example, the refractive index matching part 630 may be substantially the same as the refractive index of either the first coating part 621a or the second coating part 621b. Alternatively, the refractive indices of the refractive index matching unit 630, the first coating unit 621a, and the second coating unit 621b may all be substantially the same.

According to one embodiment, a second hard coating layer 622 may be disposed on the other surface of the base layer 610. That is, the second hard coating layer 622 may be disposed on the opposite side of the first hard coating layer 621. In the illustrated embodiment, the second hard coating layer 622 is disposed on the lower surface of the base layer 610. For example, the second hard coating layer 622 may be disposed on the other surface of the base layer 610 close to the display panel (eg, display panel 510 of FIG. 5). The second hard coating layer 622 may be a layer that protects the base layer 610 from external shock. The second hard coating layer 622 may be a part where tensile force is applied when a portion of the window 600 is bent. Accordingly, the second hard coating layer 622 can prevent the base layer 610 from being damaged by tension when the window 600 is bent due to an external impact.

According to one embodiment, the second hard coating layer 622 may include a plurality of coating parts having different hardnesses. According to one embodiment, the second hard coating layer 622 may include a third coating portion 622a having a third hardness and a fourth coating portion 622b having a fourth hardness that is higher than the third hardness. there is. Here, the third coating part 622a may correspond to the first coating part 621a, and the fourth coating part 622b may correspond to the second coating part 621b. Additionally, the third hardness may correspond to the first hardness of the first coating portion 621a, and the fourth hardness may correspond to the second hardness of the second coating portion 621b. Therefore, the description of the third coating part 622a and the fourth coating part 622b can be applied in the same way as the description of the first coating part 621a and the second coating part 621b.

According to one embodiment, the second hard coating layer 622 has a third coating portion 622a provided on the lower surface of the base layer 610, and a fourth coating portion 622b is provided on the lower surface of the third coating portion 622a. It can be provided in . When an impact is applied to the window 600 from the outside, the fourth coating part performs a primary buffering role, and the third coating part performs a secondary buffering role to prevent damage to the base layer 610, and even if damaged, the base layer (610) It can prevent fragments from scattering.

According to some embodiments, the coating layer consists of one of the first hard coating layer 621 on one surface (or upper surface) of the base layer 610 or the second hard coating layer 622 on the other surface (or lower surface) of the base layer 610. This may be omitted.

9 and 10 are diagrams for explaining a window according to another embodiment of the present disclosure. In describing various embodiments of the present disclosure with reference to FIGS. 9 and 10, the same reference numerals are assigned to the same components as those described above, and detailed descriptions are omitted.

Referring to FIG. 9, in the planar area 601, the thickness T3 of the first coating portion 621a and the thickness T4 of the second coating portion 621b may be substantially the same, but are not limited thereto. Substantially the same thickness means not only the case where the thickness is completely the same, but also the same in the range including differences that may occur due to errors in the process despite the same design.

Referring to FIG. 9, in the bending area 602, the thickness T3' of the first coating part 621a may be smaller than the thickness T4' of the second coating part 621b. In addition, while the thickness (T4') of the second coating portion (621b) in the bending region (602) and the thickness (T4) of the second coating portion (621b) in the flat region (601) are substantially the same, the bending region ( The thickness T3' of the first coating portion 621a in 602 may be thinner than the thickness T3 of the first coating portion 621a in the planar area 601. As a result, the thickness of the first hard coating layer 621 in the bending area 602 may be thinner than the thickness of the first hard coating layer 621 in the flat area 601. The thickness T3' of the first coating portion 621a in the bending region 602 becomes thinner than the thickness T3 of the first coating portion 621a in the planar region 601, so that the bending region 602 A step of the first coating portion 621a may be formed between and the flat area 601. The groove formed by this step makes the coupling of the first coating portion 621a and the second coating portion 621b more stable, so that when the window 600 is bent, the first coating portion 621a and the second coating portion 621b It can prevent liver separation.

Referring to FIG. 10, in the planar area 601, the thickness T5 of the first coating portion 621a and the thickness T6 of the second coating portion 621b may be substantially the same, but are not limited thereto. Substantially the same thickness means not only the case where the thickness is completely the same, but also the same in the range including differences that may occur due to errors in the process despite the same design.

Referring to FIG. 10, the thickness T5' of the first coating portion 621a in the bending region 602 is thinner than the thickness T5 of the first coating portion 621a in the planar region 601, and the bending region ( The thickness T6' of the second coating portion 621b in 602 may be thinner than the thickness T6 of the second coating portion 621b in the plane area 601. As a result, the thickness of the first hard coating layer 621 in the bending area 602 may be thinner than the thickness of the first hard coating layer 621 in the flat area 601. The thickness T5' of the first coating portion 621a in the bending region 602 is thinner than the thickness T5 of the first coating portion 621a in the planar region 601, thereby forming the bending region 602 and the A step of the first coating portion 621a may be formed between the planar areas 601. The groove formed by this step makes the coupling of the first coating portion 621a and the second coating portion 621b more stable, so that when the window 600 is bent, the first coating portion 621a and the second coating portion 621b ) It can prevent liver separation. In addition, by configuring the thickness (T5') of the first coating part (621a) and the thickness (T6') of the second coating part (621b) to be thin in the bending area (602), the first hard surface in the bending area (602) The thickness of the coating layer 621 can be made thinner.

11 to 19 are diagrams for explaining windows with a vertical stacked structure according to various embodiments of the present disclosure. 11 to 19 show that the hard coating layer is provided only on one side of the base layer, but the present invention is not limited thereto and the hard coating layer may also be provided on the other side of the base layer as described in FIGS. 6 to 8. The first coating portion 1410 referred to in FIGS. 11 to 19 may have the same material and hardness range as the first coating portion described in FIGS. 6 to 8 (e.g., the first coating portion 621a in FIG. 8). and the same manufacturing method can be applied. The second coating portion 1420 referred to in FIGS. 11 to 19 may have the same material and hardness range as the second coating portion described in FIGS. 6 to 8 (e.g., the second coating portion 621b in FIG. 8). and the same manufacturing method can be applied. The base layer 1200 referred to in FIGS. 11 to 19 may have the same configuration as the base layer described in FIGS. 6 to 8 (eg, the base layer 610 in FIG. 8). The bending area 1100b referred to in FIGS. 11 to 19 may be an area corresponding to the bending area described in FIGS. 6 to 8 (eg, the bending area 602 in FIG. 8 ). The planar area 1100a referred to in FIGS. 11 to 19 may be an area corresponding to the planar area described in FIGS. 6 to 8 (eg, the planar area 601 in FIG. 8 ).

Referring to FIGS. 11 to 19 , a window 1100 according to various embodiments may include a first hard coating layer 1400 or a base layer 1200. According to various embodiments, the first hard coating layer 1400 may include a first coating portion 1410 or a second coating portion 1420. Here, the first hardness of the first coating part 1410 may be smaller than the second hardness of the second coating part 1420. For example, at least a portion of the first coating portion 1410 may be disposed within the bending area 1100b. For example, at least a portion of the second coating portion 1420 may be disposed within the planar area 1100a. For example, the first coating portion 1410 and the second coating portion 1420 may be disposed on upper surfaces of different base layers 1200, respectively. Therefore, a part of the side surface of the first coating part 1410 may contact a part of the side surface of the second coating part 1420.

According to various embodiments, at a portion where the first coating portion 1410 of the bending region 1100b and the second coating portion 1420 of the flat region 1100a contact each other, a portion of the first coating portion 1410 is 2 At least one protrusion 1411 protruding in the direction toward the coating portion 1420 may be formed and coupled to the second coating portion 1420. For example, at least one protrusion 1411 may be provided on the side of the first coating portion 1410 that is in contact with a portion of the side surface of the second coating portion 1420. That is, the first coating portion 1410 is at least one part of the side that is in contact with the second coating portion 1420 protrudes in the direction of the second coating portion 1420 and is inserted into the second coating portion 1420. It may include a protrusion 1411. Here, the cross-sectional shape of the protrusion 1411 may be polygonal or round.

According to various embodiments, at a portion where the first coating portion 1410 of the bending region 1100b and the second coating portion 1420 of the planar region 1100a contact each other, the second coating portion 1420 is coated with the first coating portion. The protrusion 1411 of the portion 1410 may include at least one groove 1421 into which the protrusion 1411 is inserted. For example, at least one protrusion 1411 may be inserted into the side of the second coating 1420 opposite to the at least one protrusion 1411 provided on the side of the first coating 1410. A groove 1421 may be provided. That is, at least one groove 1421 having a shape corresponding to the at least one protrusion 1411 may be formed in the second coating portion 1420 at a position corresponding to the at least one protrusion 1411 . The protrusion 1411 of the first coating part 1410 is coupled to the groove 1421 of the second coating part 1420, thereby improving the bonding force between the first coating part 1410 and the second coating part 1420, When the first hard coating layer 1400 is stretched by bending, peeling that may occur between the first coating portion 1410 and the second coating portion 1420 can be prevented.

According to various embodiments, the thickness of the first coating part 1410 of the bending area 1100b may be thinner than the thickness of the second coating part 1420 of the flat area 1100a. By configuring the thickness of the coating layer in the bending area 1100b to be thin, bending performance can be improved. In addition, it consists only of the first coating part 1410, which has a hardness lower than the second hardness of the second coating part 1420, and when compared with the embodiments of FIGS. 8 to 10, the coating layer in the bending area 1100b By making it thicker, impact resistance can also be improved.

According to various embodiments, the window 1100 may further include a refractive index matching unit 1600 disposed on the first hard coating layer 1400. That is, the refractive index matching part 1600 may be disposed on the upper surface of each of the first coating part 1410 and the second coating part 1420. Here, the refractive index matching unit 1600 may have the same configuration as the refractive index matching unit 630 of FIG. 8.

According to some embodiments, a portion of the second coating portion 1420 is in contact with the second coating portion 1420 of the flat area 1100a and the first coating portion 1410 of the bending area 1100b. 1 It may protrude toward the coating portion 1410 and be coupled within the first coating portion 1410.

The embodiments shown in FIGS. 11 to 13 are examples in which the coupling structure between the first coating portion 1410 and the second coating portion 1420 has a right-angled coupling structure. Hereinafter, embodiments shown in FIGS. 11 to 13 will be described.

Referring to FIG. 11, the first coating portion 1410 may have a two-stage stacked structure. Each laminated structure can have different widths. According to one embodiment, at least one first protrusion 1411a may be formed on one end of the two-stage stacked structure in the first coating part 1410. That is, in the first coating portion 1410, a portion of the first protrusion 1411a may be located in the planar area 1100a. The first protrusion 1411a may have, for example, a square cross-sectional shape (or a right-angled shape). According to one embodiment, the second coating portion 1420 may include a first groove 1421a having a square cross-sectional shape (or right-angled shape) at a position corresponding to the first protrusion 1411a.

Referring to FIG. 12, the first coating portion 1410 may have a three-stage stacked structure. Each laminated structure can have different widths. According to one embodiment, at least one second protrusion 1411b may be formed on the upper end and the lower end of the three-stage stacked structure in the first coating part 1410. That is, a portion of the second protrusion 1411b of the first coating portion 1410 may be located in the planar area 1100a. The second protrusion 1411b may have, for example, a square cross-sectional shape (or a right-angled shape). According to one embodiment, the second coating portion 1420 may include a second groove 1421b having a square cross-sectional shape (or right-angle shape) at a position corresponding to the second protrusion 1411b.

Referring to FIG. 13, the first coating portion 1410 may have a three-stage stacked structure. Each laminated structure can have different widths. According to one embodiment, at least one third protrusion 1411c may be formed in the middle of the three-stage stacked structure in the first coating part 1410. That is, a portion of the third protrusion 1411c of the first coating portion 1410 may be located in the planar area 1100a. The third protrusion 1411c may have, for example, a square cross-sectional shape (or a right-angled shape). According to one embodiment, the second coating portion 1420 may include a third groove 1421c having a square cross-sectional shape (or right-angle shape) at a position corresponding to the third protrusion 1411c.

The embodiments shown in FIGS. 14 to 16 are examples in which the coupling structure between the first coating portion 1410 and the second coating portion 1420 has a diagonal coupling structure. Hereinafter, embodiments shown in FIGS. 14 to 16 will be described.

Referring to FIG. 14, at least one fourth protrusion 1411d may be formed in the first coating portion 1410. That is, a portion of the fourth protrusion 1411d of the first coating portion 1410 may be located in the planar area 1100a. The fourth protrusion 1411d may have, for example, a triangular cross-sectional shape (or diagonal shape). According to one embodiment, the second coating portion 1420 may include a fourth groove 1421d having a triangular cross-sectional shape (or diagonal shape) at a position corresponding to the fourth protrusion 1411d.

Referring to FIGS. 15 and 16 , the first coating portion 1410 may have a two-stage stacked structure. Each end of the first coating portion 1410 may include at least one protrusion (the fifth protrusion 1411e or the sixth protrusion 1411f). The fifth protrusion 1411e or the sixth protrusion 1411f each has a triangular cross-sectional shape (or diagonal line shape), but the protruding shape can be changed by changing the direction of the diagonal line. According to one embodiment, the second coating portion 1420 has a shape corresponding to the fifth protrusion 1411e or the sixth protrusion 1411f at a position corresponding to the fifth protrusion 1411e or the sixth protrusion 1411f. The branch may include a fifth groove 1421e or a sixth groove 1421f.

The embodiments shown in FIGS. 17 to 19 are examples in which the coupling structure between the first coating portion 1410 and the second coating portion 1420 has a right angle/oblique composite coupling structure. Hereinafter, embodiments shown in FIGS. 17 to 19 will be described.

Referring to FIG. 17 , at least one seventh protrusion 1411g may be formed in the first coating portion 1410. That is, a portion of the seventh protrusion 1411g of the first coating portion 1410 may be located in the planar area 1100a. The seventh protrusion 1411g may have, for example, a polygonal cross-sectional shape (or a right-angle/oblique composite shape). According to one embodiment, the second coating portion 1420 may include a seventh groove 1421g having a polygonal cross-sectional shape (or a right angle/oblique composite shape) at a position corresponding to the seventh protrusion 1411g. .

Referring to FIGS. 18 and 19 , the first coating portion 1410 may have a two-stage stacked structure. Each end of the first coating portion 1410 may include at least one protrusion (the eighth protrusion 1411h or the ninth protrusion 1411i). The eighth protrusion 1411h or the ninth protrusion 1411i each has a polygonal cross-sectional shape (or a right angle/slanted line composite shape), but the protruding shape can be changed by changing the direction of the right angle/slanted line. According to one embodiment, the second coating portion 1420 has a shape corresponding to the eighth protrusion 1411h or the ninth protrusion 1411i at a position corresponding to the eighth protrusion 1411h or the ninth protrusion 1411i. The branch may include an eighth groove 1421h or a ninth groove 1421i.

The present disclosure is not limited to the above-described embodiments, and may include embodiments that can be easily combined by a person skilled in the art by combining the above drawings.

FIG. 20 is a diagram for explaining the function of a window with a vertical stacked structure according to various embodiments of the present disclosure. In describing various embodiments of the present disclosure with reference to FIG. 20, the same reference numerals are assigned to the same components as those described above, and detailed descriptions are omitted.

As shown, when the window 1100 is folded out, the first hard coating layer 1400 may be stretched. When the first hard coating layer 1400 is stretched, force may be applied in the direction (F) opposite to the direction in which the first coating portion 1410 is out-folded due to the tensile force. Here, the protrusion 1411 of the first coating part 1410 is fixed to the groove 1421 of the second coating part 1420 to prevent both ends of the first coating part 1410 from moving in the F direction and peeling off. can do. That is, a portion of the groove 1421 of the second coating portion 1420 may function as a locking protrusion for fixing the first coating portion 1410. 20 is explained based on the embodiment of FIG. 11 having the shape of the first protrusion 1411a and the first groove 1421a. However, like the embodiments shown in FIGS. 12 to 19, the first hard coating layer 1400 ) can prevent peeling between the first coating portion 1410 and the second coating portion 1420 by the protrusions (1411b to 1411i) and grooves (1421b to 1421i) when tensioned.

21 to 23 are diagrams for explaining a window with a buried structure according to various embodiments of the present disclosure. 21 to 23 show that the hard coating layer is provided only on one side of the base layer, but the present invention is not limited thereto, and the hard coating layer may also be provided on the other side of the base layer as described in FIGS. 6 to 8. The first coating portion 2121 referred to in FIGS. 21 to 23 may have the same material and hardness range as the first coating portion illustrated in FIGS. 6 to 8 (e.g., the first coating portion 621a in FIG. 8). and the same manufacturing method can be applied. The second coating portion 2122 referred to in FIGS. 21 to 23 may have the same material and hardness range as the second coating portion illustrated in FIGS. 6 to 8 (e.g., the second coating portion 621b in FIG. 8). and the same manufacturing method can be applied. The base layer 2110 referred to in FIGS. 21 to 23 may have the same configuration as the base layer described in FIGS. 6 to 8 (eg, the base layer 610 in FIG. 8). The bending area 2100b referred to in FIGS. 21 to 23 may be an area corresponding to the bending area described in FIGS. 6 to 8 (eg, the bending area 602 in FIG. 8 ). The planar area 2100a referred to in FIGS. 21 to 23 may be an area corresponding to the planar area described in FIGS. 6 to 8 (eg, the planar area 601 in FIG. 8 ).

Referring to FIGS. 21 to 23 , a window 2100 according to various embodiments may include a first hard coating layer 2120 or a base layer 2110. According to various embodiments, the first hard coating layer 2120 may include a first coating portion 2121 or a second coating portion 2122. Here, the first hardness of the first coating part 2121 may be smaller than the second hardness of the second coating part 2122. For example, at least a portion of the first coating portion 2121 may be disposed within the bending area 2100b. The second coating portion 2122 may be disposed within, for example, the flat area 2100a and the bending area 2100b. For example, the second coating portion 2122 may be arranged to surround the first coating portion 2121. That is, the second coating portion 2122 may be disposed to contact the top and side surfaces of the first coating portion 2121. As a result, the first hard coating layer 2120 may be configured in a structure in which the first coating portion 2121 is embedded in the second coating portion 2122. The first coating part 2121 is embedded in the second coating part 2122, so that when the window 2100 is bent, the first coating part 2121 is stably embedded, so that the first coating part 2121 and the second coating part are formed. The coupling performance of the unit 2122 can be further improved.

According to various embodiments, the end portion 2121a of the first coating portion 2121 may be formed in a right angle shape as shown in FIG. 21, an oblique shape as in FIG. 22, or a combined right angle/oblique shape as in FIG. 23.

According to various embodiments, the thickness of the first hard coating layer 2120 in the bending area 2100b may be thinner than the thickness of the first hard coating layer 2120 in the planar area 2100a.

According to various embodiments, the window 2100 may further include a refractive index matching unit 2130 disposed on the first hard coating layer 2120. That is, the refractive index matching part 2130 may be disposed on the upper surface of the second coating part 2122. Here, since the first coating part 2121 is buried by the second coating part 2122, it may not come into contact with the refractive index matching part 2130. Here, the refractive index matching unit 2130 may have the same configuration as the refractive index matching unit 630 of FIG. 8.

FIGS. 24 to 28 are diagrams for explaining a window structure applied to a rollable display device according to various embodiments of the present disclosure. FIGS. 24 and 25 are diagrams for explaining the process of enlarging and reducing the screen of the rollable display device 2400. FIGS. 26 to 28 are diagrams for explaining embodiments of a window 2600 applied to the rollable display device 2400 among various embodiments of the present disclosure. 26 to 28 show that the hard coating layer is provided only on one side of the base layer, but the present invention is not limited thereto, and the hard coating layer may also be provided on the other side of the base layer as described in FIGS. 6 to 8. The first coating portion 2621 referred to in FIGS. 26 to 28 may have the same material and hardness range as the first coating portion illustrated in FIGS. 6 to 8 (e.g., the first coating portion 621a in FIG. 8). and the same manufacturing method can be applied. The second coating portion 2622 referred to in FIGS. 26 to 28 may have the same material and hardness range as the second coating portion described in FIGS. 6 to 8 (e.g., the second coating portion 621b in FIG. 8). and the same manufacturing method can be applied. The base layer 2610 referred to in FIGS. 26 to 28 may have the same configuration as the base layer described in FIGS. 6 to 8 (eg, the base layer 610 in FIG. 8).

Referring to FIGS. 24 and 25 , the rollable display device 2400 may be defined by a planar area 2400a and a bending area 2400b (or rolling area). For example, the flat area 2400a may be an area where a flat surface is maintained regardless of whether the flat portion of the rollable display device 2400 is enlarged or reduced. For example, the bending area 2400b may be an area that rolls according to the enlargement or reduction of the flat portion of the rollable display device 2400.

FIGS. 26 to 28 show various embodiments based on a cross section of the rollable display device 2400 of FIG. 25 when cut along line X-X'. The planar area 2600a of the window 2600 may correspond to the planar area 2400a of the rollable display device 2400. The bending area 2600b of the window 2600 may correspond to the bending area 2400b of the rollable display device 2400.

According to various embodiments, the thickness of the first hard coating layers 2620, 2640, and 2650 in the bending area 2600b may be thinner than the thickness of the first hard coating layers 2620, 2640, and 2650 in the planar area 2600a. . A step may be formed in the first hard coating layers 2620, 2640, and 2650 at a portion where the flat area 2600a and the bending area 2600b contact each other. The thickness of the first hard coating layer (2620, 2640, 2650) in the portion corresponding to the bending area (2600b) is configured to be thinner than the thickness of the first hard coating layer (2620, 2640, 2650) in the portion corresponding to the flat area (2600a). By doing so, the window 2600 can be bent (or rolled) more easily.

According to one embodiment, as shown in FIG. 26, the first hard coating layer 2620 of the window 2600 provided in the rollable display device 2400 may have a horizontal stacked structure. also. By horizontally stacking the first coating portion 2621 and the second coating portion 2622 with different hardnesses on the top of the base layer 2610, impact resistance performance can be improved compared to when one type of coating portion is used. You can. A refractive index matching unit 2630 may be provided on the first hard coating layer 2620.

According to one embodiment, as shown in FIG. 27, the first hard coating layer 2640 of the window 2600 provided in the rollable display device 2400 may have a vertical stacked structure. According to one embodiment, at least a portion of the first coating portion 2641 may be disposed within the bending area 2600b. According to one embodiment, at least a portion of the second coating portion 2642 may be disposed within the planar area 2600a. For example, the first coating part 2641 and the second coating part 2642 may be disposed on the upper surfaces of different base layers 2610, respectively. The thickness of the first coating portion 2641 may be thinner than the thickness of the second coating portion 2642.

According to one embodiment, at a portion where the first coating portion 2641 and the second coating portion 2642 are in contact, at least one part of the first coating portion 2641 protrudes in the direction toward the second coating portion 2642. A protrusion 2641a may be formed and coupled to the second coating portion 2642. According to one embodiment, the second coating portion 2642 may include a groove 2642a into which the protrusion 2641a is inserted. Here, the first hardness of the first coating part 2641 may be smaller than the second hardness of the second coating part 2642. The combination of the protrusion 2641a and the groove 2642a can strengthen the bond between the first coating portion 2641 and the second coating portion 2642 and prevent peeling due to tension.

FIG. 27 illustrates the case where the protrusion 2641a has a right-angled shape, but the present invention is not limited thereto and may have the shape of the protrusion corresponding to FIGS. 12 to 19.

According to one embodiment, as shown in FIG. 28, the first hard coating layer 2650 of the window 2600 provided in the rollable display device 2400 may have a semi-buried laminated structure. According to one embodiment, at least a portion of the first coating portion 2651 may be disposed within the bending area 2600b. According to one embodiment, the second coating portion 2652 may be disposed in the flat area 2600a and the bending area 2600b. For example, the second coating portion 2652 may be arranged to surround a portion of the side surface and the top surface of the first coating portion 2651. Here, the first hardness of the first coating part 2651 may be smaller than the second hardness of the second coating part 2652. The first coating portion 2651 is coupled in such a way that a portion of the first coating portion 2651 is surrounded by the second coating portion 2652, thereby preventing peeling during bending.

Figure 29 is a flowchart showing a method of manufacturing a horizontal stacked structure among windows according to various embodiments of the present disclosure. 30A to 30C are diagrams for explaining an example of a method of manufacturing a horizontal stacked structure among windows according to various embodiments of the present disclosure.

The first coating portion 3040 referred to in FIGS. 29 to 30C may have the same material and hardness range as the first coating portion described in FIGS. 6 to 8 (e.g., the first coating portion 621a in FIG. 8). and the same manufacturing method can be applied. The second coating portion 3070 referred to in FIGS. 29 to 30C may have the same material and hardness range as the second coating portion described in FIGS. 6 to 8 (e.g., the second coating portion 621b in FIG. 8). and the same manufacturing method can be applied.

According to various embodiments, a hard coating layer on a window may be manufactured by a silk screen coating method. After mounting the silk screens (3031, 3032, 3033) on the top spaced apart from the base layer (3050) seated on the top of the stage, the liquid composition can be dropped on the top of the silk screens (3031, 3032, 3033). there is. The composition dropped on top of the silk screens 3031, 3032, and 3033 may be pushed into the mesh portions of the silk screens 3031, 3032, and 3033 by the squeeze 3010 and applied on top of the base layer 3050. By adjusting the thickness of the mesh portion of the silk screen (3031, 3032, 3033), the thickness of the applied coating material can be adjusted. The composition applied on top of the base layer 3050 may form part of the hard coating layer through a curing process. The applied composition can be cured at elevated temperatures, for example, by one or more of heat, UV, IR, and microwaves.

Hereinafter, a method for manufacturing a hard coating layer having a horizontal laminated structure using a silk screen coating method will be described in detail.

After the first coating material 3020 is applied to cover the upper surface of the base layer 3050, a curing process can be performed (S2910). The S2910 process may correspond to FIG. 30A. Here, the first coating material 3020 may be the composition of the first coating portion 3040. After the first coating material 3020 is dropped on the first silk screen 3031, the first coating material 3020 may be passed through the mesh of the first silk screen 3031 using a squeeze 3010. . In this process, the first coating material 3020 may be applied to the entire space of the upper surface of the base layer 3050 through the mesh portion of the first silk screen 3031. The first silk screen 3031 may have a mesh formed in a portion corresponding to the upper surface of the base layer 3050 through which the first coating material 3020 can penetrate. After the first coating material 3020 is applied, the first coating portion 3040 may be formed through a curing process.

After forming the first coating portion 3040, the second coating material 3060 may be applied to cover the upper surface of the first coating portion 3040 and then a curing process may be performed (S2920). The S2920 process may correspond to FIG. 30B. Here, the second coating material 3060 may be the composition of the second coating portion 3070. After the second coating material 3060 is dropped onto the second silk screen 3032, the second coating material 3060 can be passed through the mesh of the second silk screen 3032 using a squeeze 3010. . In this process, the second coating material 3060 may be applied to the entire space of the upper surface of the first coating portion 3040 through the mesh portion of the second silk screen 3032. The second silk screen 3032 may have a mesh formed in a portion corresponding to the upper surface of the first coating portion 3040 to allow the second coating material 3060 to penetrate therethrough. The second silk screen 3032 may have the same shape as the first silk screen 3031. After the second coating material 3060 is applied, a second coating portion 3070 may be formed on the first coating portion 3040 through a curing process. When the S2920 process is completed, the thickness of the hard coating layer in the flat area (e.g., the flat area 601 in FIG. 6) and the thickness of the hard coating layer in the bending area (e.g., the bending area 602 in FIG. 6) are the same. can do. Through the following process, a difference can be created between the thickness of the hard coating layer in the flat area 601 and the thickness of the hard coating layer in the bending area 602.

After completing the S2920 process, the second coating material 3060 is applied to cover the upper surface of the cured second coating portion 3070 excluding the bending area 602, and then the curing process can be performed (S2930). The second coating material 3060 may be applied, for example, to cover the planar area 601 of the cured second coating 3070. The S2930 process may correspond to FIG. 30C. According to some embodiments, the second coating material 3060 may be applied to partially cover the bending area 602 during S2920. After the second coating material 3060 is dropped on the third silk screen 3033, the second coating material 3060 can be passed through the mesh of the third silk screen 3033 using a squeeze 3010. . In this process, the second coating material 3060 may be applied to a portion corresponding to the flat area 601 through the mesh portion of the third silk screen 3033. The third silk screen 3033 may be meshed so that the second coating material 3060 can penetrate only the portion corresponding to the flat area 601. Through the S2930 process, a differential thickness of the hard coating layer may be formed between the bending area 602 and the flat area 601.

FIG. 31 is a diagram illustrating an example of a method of manufacturing a vertically stacked structure among windows according to various embodiments of the present disclosure. FIGS. 32A to 32C are diagrams for explaining an example of a method of manufacturing a vertically stacked structure among windows according to various embodiments of the present disclosure.

The first coating portion 3240 referred to in FIGS. 31 to 32C may have the same material and hardness range as the first coating portion described in FIGS. 11 to 19 (e.g., the first coating portion 1410 of FIG. 11). and the same manufacturing method can be applied. The second coating portion 3270 referred to in FIGS. 31 to 32C may have the same material and hardness range as the second coating portion (e.g., the second coating portion 1420 of FIG. 11) described in FIGS. 11 to 19. and the same manufacturing method can be applied.

Hereinafter, a method for manufacturing a hard coating layer having a horizontal laminated structure using a silk screen coating method will be described in detail.

After the first coating material 3220 is applied to cover the upper surface including the bending area (e.g., the bending area 1100b in FIG. 11) of the base layer 3250, a curing process may be performed (S3110). The S3110 process may correspond to FIG. 32A. Here, the first coating material 3220 may be the composition of the first coating portion 3240. After the first coating material 3220 is dropped on the fourth silk screen 3231, the first coating material 3220 may be passed through the mesh of the fourth silk screen 3231 using a squeeze 3210. . In this process, the first coating material 3220 may be applied to the entire space of the bending area 1100b of the base layer 3250 through the mesh portion of the fourth silk screen 3231. The fourth silk screen 3231 may have a mesh formed so that the first coating material 3220 can penetrate the portion corresponding to the bending area 1100b of the base layer 3250. After the first coating material 3220 is applied, the first coating portion 3240 may be formed through a curing process.

After forming the first coating 3240, the second coating material 3260 is applied to the top surface including the planar region of the base layer 3250 (e.g., the planar region 1100a in FIG. 11) and the first coating ( After applying it to cover part of 3240), the curing process can proceed (S3120). The S3120 process may correspond to FIG. 32B. Here, the second coating material 3260 may be the composition of the second coating portion 3270. After the second coating material 3260 is dropped onto the fifth silk screen 3232, the second coating material 3260 can be passed through the mesh of the fifth silk screen 3232 using a squeeze 3210. . In this process, the second coating material 3260 is applied to a portion of the width direction end of the upper surface of the first coating portion 3240 and the planar area 1100a of the base layer 3250 through the mesh portion of the fifth silk screen 3232. Can be applied to. The fifth silk screen 3232 allows the second coating material 3260 to penetrate a portion of the width direction end of the upper surface of the first coating portion 3240 and a portion corresponding to the planar area 1100a of the base layer 3250. A mesh may be formed so that After the second coating material 3260 is applied, the second coating portion 3270 may be formed through a curing process.

After completing the S3120 process, the first coating material can be applied to the area where the second coating material is not applied and then the curing process can be performed (S3130). Here, the first coating material 3220 may be applied, for example, in contact with a portion of the upper surface of the first coating portion 3240 cured in process S3110. The first coating material 3220 may be applied, for example, within the bending area 1100b. The S3130 process may correspond to FIG. 32C. After the first coating material 3220 is dropped on the sixth silk screen 3233, the first coating material 3220 may be passed through the mesh of the sixth silk screen 3233 using a squeeze 3210. . In this process, the first coating material 3220 may be applied through the mesh portion of the sixth silk screen 3233. The sixth silk screen 3233 may be meshed so that the first coating material 3220 can penetrate only a portion corresponding to a portion of the bending area 1100b. The mesh of the sixth silk screen 3233 is formed at a position overlapping with the mesh of the fourth silk screen 3231, and the mesh width of the sixth silk screen 3233 is the mesh width of the fourth silk screen 3231. It can be smaller than

FIGS. 32A to 32C illustrate the embodiment shown in FIG. 11 among various embodiments of the vertical stacked structure shown, and other embodiments shown in FIGS. 12 to 19 can also be used by adjusting the viscosity of the composition. It can be manufactured using a silk screen coating method.

29 to 32C illustrate a manufacturing method of an example of a horizontal laminated structure and an example of a vertical laminated structure, but the method is not limited thereto, and those skilled in the art can use the silk screen coating method described in FIGS. 29 to 32c. Various embodiments of the present disclosure may be implemented using the present disclosure.

Figure 33 is a flowchart showing a process of applying a coating on the base layer of a window according to various embodiments of the present disclosure.

Depending on the laminated structure, a silk screen corresponding to the location to be applied can be prepared (S3310). Here, the silk screen may be one of the first to sixth silk screens 3031, 3032, 3033, 3231, 3232, and 3233 described in FIGS. 29 to 32C, and may also be a silk screen with various mesh patterns.

After completing the S3310 process, the coating material can be pressed onto the silk screen using a squeeze (3010 or 3210) (S3320). When the coating material is pressed onto the silk screen, the coating material penetrates only the mesh portion and can be applied on the desired portion.

After completing the S3320 process, the coating material can be cured (S3330).

By repeating processes S3310 to S3330, it is possible to manufacture a hard coating layer including coating parts with different hardnesses, with differential thicknesses between the flat area and the bending area.

The terms used in this disclosure are only used to describe specific embodiments and are not intended to limit the disclosure. For example, a component expressed in the singular should be understood as a concept that includes plural components unless the context clearly indicates only the singular. As used in this disclosure, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “ Each of phrases such as "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. It should be understood that the term 'and/or' used in this disclosure encompasses any and all possible combinations of one or more of the listed items. Terms such as 'include', 'have', 'consist', etc. used in the present disclosure are only intended to designate the presence of features, components, parts, or combinations thereof described in the present disclosure, and the use of such terms It is not intended to exclude the presence or addition of one or more other features, components, parts, or combinations thereof. Expressions such as 'first', 'second', etc. used in the present disclosure can modify various components regardless of order and/or importance, and are only used to distinguish one component from another component. It does not limit the components.

The expression 'configured to' used in the present disclosure means, depending on the situation, for example, 'suitable for,' 'having the ability to,' 'designed to,' 'modified to,' "made to. ,' or 'capable of ~', etc. can be appropriately used interchangeably. The term 'configured to' may not necessarily mean 'specially designed' in terms of hardware. Instead, in some situations, 'configured to ~' may not necessarily mean 'specially designed' in terms of hardware. The expression 'device' can mean that the device is 'capable of' in conjunction with other devices or components. For example, the phrase 'device configured (or set) to perform A, B, and C'. may be a dedicated device for performing the corresponding operation, or may mean a general-purpose device capable of performing various operations including the corresponding operation.

Meanwhile, the terms “upper side,” “lower side,” and “front-back direction” used in the present disclosure are defined based on the drawings, and the shape and location of each component are not limited by these terms.

Although the foregoing description in the present disclosure has been centered on specific embodiments, the present disclosure is not limited to such specific embodiments, and is understood to encompass various modifications, equivalents, and/or replacements of the various embodiments. It has to be.

According to an embodiment of the present disclosure, a display device (e.g., display device 500 of FIG. 5) is disposed on a display panel (e.g., display panel 510 of FIG. 5) and is capable of bending. A window (e.g., window 530 in FIG. 5 or window 530 in FIG. 7) in which a region (e.g., bending region 502 in FIG. 5) and a planar region that remains flat (e.g., planar region 501 in FIG. 5) are defined. It includes a window 600), wherein the window includes a base layer (e.g., base layer 610 in FIG. 7) and a plurality of coating portions disposed on one surface of the base layer and having different hardnesses (e.g., FIG. 7). The first hard coating layer (e.g., the first hard coating layer 621 in FIG. 7) including a first coating portion 621a or a second coating portion 621b) and provided on the planar area. 1 The thickness of the hard coating layer may be thicker than the thickness of the first hard coating layer provided on the bending area.

According to one embodiment of the present disclosure, the plurality of coating units have a structure in which a second coating unit is stacked on an upper surface of the first coating unit, and the first hard coating layer has one surface of the first coating unit of the base layer. One side may be in contact with the other side of the first coating portion, and the other side may be in contact with one side of the second coating portion.

According to an embodiment of the present disclosure, the thickness of the first coating portion may be relatively thinner in the bending area than in the planar area.

According to one embodiment of the present disclosure, the plurality of coating units include a first coating unit disposed in the bending area and a second coating unit disposed in the flat area, and the first hardness of the first coating unit is the second coating unit. It is smaller than the second hardness of the coating portion, and the first hard coating layer may be disposed so that a portion of the side surface of the first coating portion and a portion of a side surface of the second coating portion are in contact with each other.

According to an embodiment of the present disclosure, at least one protrusion (e.g., wp1 protrusion 1411a in FIG. 11) is provided on the side of the first coating part that is in contact with a portion of the side surface of the second coating part, and the first coating part At least one groove (eg, wp1 groove 1421a in FIG. 11) may be provided on the side of the second coating part opposite to the at least one protrusion provided on the side so that the at least one protrusion can be inserted.

According to an embodiment of the present disclosure, the at least one protrusion may have a polygonal cross-sectional shape.

According to one embodiment of the present disclosure, at least one protrusion is provided on a side of the second coating part that is in contact with a portion of the side surface of the first coating part, and the protrusion opposite to the at least one protrusion provided on the side of the second coating part is provided. At least one groove may be provided on the side of the first coating portion so that the at least one protrusion can be inserted.

According to one embodiment of the present disclosure, the plurality of coating parts include a first coating part and a second coating part, the first hardness of the first coating part is smaller than the second hardness of the second coating part, and the first hardness of the first coating part is smaller than the second hardness of the second coating part. The hard coating layer may be arranged so that the first coating part is disposed in the bending area, and the second coating part covers the upper surface of the base layer and the periphery of the first coating part in the planar area.

According to one embodiment of the present disclosure, the thickness of the first hard coating layer may decrease toward the edge of the window at the side of the bending area that is not in contact with the flat area.

According to one embodiment of the present disclosure, the window may further include a refractive index matching unit (eg, the refractive index matching unit 630 of FIG. 7) provided on the outer surface of the first hard coating layer.

According to one embodiment of the present disclosure, the plurality of coating parts include a first coating part and a second coating part, the first hardness of the first coating part is less than 30 kpa, and the second hardness of the second coating part is 30 kpa. It can be greater than or equal to kpa.

According to one embodiment of the present disclosure, the window is disposed on the other side of the base layer, which is opposite to one side of the base layer, and has a plurality of coating portions having different hardnesses (e.g., the third coating portion 622a in FIG. 7 or It may further include a second hard coating layer (eg, the second hard coating layer 622 of FIG. 7) including the fourth coating portion 622b of FIG. 7.

According to one embodiment of the present disclosure, the second hard coating layer includes a third coating portion and a fourth coating portion, one surface of the third coating portion is in contact with the other surface of the base layer, and one surface of the fourth coating portion is in contact with the other surface of the base layer. It may be in contact with the other side of the third coating portion.

According to one embodiment of the present disclosure, the thickness of the base layer is 20 m to 40 It can be m.

According to an embodiment of the present disclosure, a bendable housing configured to facilitate bending along a bending axis (e.g., the foldable housing 201 of FIG. 2); and a display panel, a window disposed on the display panel, and a protective layer disposed on the window, defining a bendable area that can be bent and a flat area that remains flat, wherein the flexible display accommodated in the housing (e.g. It includes a flexible or foldable display 250 of FIG. 2, wherein the window includes a base layer; and a first hard coating layer disposed on one surface of the base layer and including a plurality of coating parts having different hardnesses, wherein the thickness of the first hard coating layer provided on the planar area is on the bending area. It may be thicker than the thickness of the first hard coating layer provided.

According to one embodiment of the present disclosure, the plurality of coating units have a structure in which a second coating unit is stacked on an upper surface of the first coating unit, and the first hard coating layer has one surface of the first coating unit and one surface of the base layer. and the other side of the first coating portion may be in contact with one side of the second coating portion.

According to one embodiment of the present disclosure, the plurality of coating units include a first coating unit disposed in the bending area and a second coating unit disposed in the flat area, and the first hardness of the first coating unit is the second coating unit. It is smaller than the second hardness of the coating portion, and the first hard coating layer may be disposed so that a portion of the side surface of the first coating portion and a portion of a side surface of the second coating portion are in contact with each other.

According to one embodiment of the present disclosure, the plurality of coating units include a first coating unit and a second coating unit,

The first hardness of the first coating part is smaller than the second hardness of the second coating part, and the first hard coating layer is formed, wherein the first coating part is disposed in the bending area, and the second coating part is applied to the base in the planar area. It may be arranged to cover the upper surface of the layer and the periphery of the first coating portion.

According to one embodiment of the present disclosure, the window may further include a refractive index matching portion provided on the outer surface of the first hard coating layer.

Claims (20)

display panel; and
a window disposed on the display panel, wherein a bendable area that can be bent and a flat area that remains flat are defined;
The window is,
base layer; and
It is disposed on one side of the base layer and includes a first hard coating layer including a plurality of coating parts having different hardnesses,
The thickness of the first hard coating layer provided on the flat area is thicker than the thickness of the first hard coating layer provided on the bending area,
display device. According to paragraph 1,
The plurality of coating units have a structure in which a second coating unit is stacked on an upper surface of the first coating unit,
The first hard coating layer is,
One surface of the first coating portion is in contact with one surface of the base layer,
A display device wherein the other surface of the first coating part is in contact with one surface of the second coating part. According to paragraph 2,
The thickness of the first coating portion is,
A display device that is relatively thinner in the bending area than in the planar area. According to paragraph 1,
The plurality of coating portions include a first coating portion disposed in the bending area and a second coating portion disposed in the flat area,
The first hardness of the first coating portion is smaller than the second hardness of the second coating portion,
The first hard coating layer is,
A display device where a portion of a side surface of the first coating portion and a portion of a side surface of the second coating portion are arranged to contact each other. According to paragraph 4,
At least one protrusion is provided on a side of the first coating portion that is in contact with a portion of the side surface of the second coating portion,
At least one groove is provided on a side of the second coating portion opposite to the at least one protrusion provided on a side of the first coating portion so that the at least one protrusion can be inserted. According to clause 5,
The at least one protrusion is,
A display device having a polygonal cross-sectional shape. According to paragraph 4,
At least one protrusion is provided on a side of the second coating portion that is in contact with a portion of the side surface of the first coating portion,
At least one groove is provided on a side of the first coating portion opposite to the at least one protrusion provided on a side of the second coating portion so that the at least one protrusion can be inserted. According to paragraph 1,
The plurality of coating units include a first coating unit and a second coating unit,
The first hardness of the first coating portion is smaller than the second hardness of the second coating portion,
The first hard coating layer is,
The first coating portion is disposed in the bending area,
The display device wherein the second coating part is disposed to cover the upper surface of the base layer and the periphery of the first coating part in the planar area. According to paragraph 1,
The window is,
On the side of the bending area that is not in contact with the planar area,
A display device in which the thickness of the first hard coating layer decreases toward the edge. According to paragraph 1,
The window is,
A display device further comprising a refractive index matching portion provided on an outer surface of the first hard coating layer. According to paragraph 1,
The plurality of coating units include a first coating unit and a second coating unit,
The first hardness of the first coating portion is less than 30 kpa,
The second hardness of the second coating portion is greater than or equal to 30 kpa. According to paragraph 1,
The window is,
The display device further includes a second hard coating layer disposed on the other side of the base layer, which is opposite to the one side of the base layer, and including a plurality of coating portions having different hardnesses. According to clause 12,
The second hard coating layer includes a third coating portion and a fourth coating portion,
One side of the third coating portion is in contact with the other side of the base layer,
A display device wherein one surface of the fourth coating part is in contact with the other surface of the third coating part. According to paragraph 1,
The thickness of the base layer is 20 m to 40 m, display device. According to paragraph 1,
The thickness of the first hard coating layer in the bending area is 20 m to 30 m, display device. In electronic devices,
A bendable housing configured to facilitate bending along the bending axis; and
Comprising a display panel, a window disposed on the display panel, and a protective layer disposed on the window, defining a bendable area that can be bent and a flat area that remains flat, and comprising a flexible display accommodated in the housing,
The window is,
base layer; and
It is disposed on one side of the base layer and includes a first hard coating layer including a plurality of coating parts having different hardnesses,
The thickness of the first hard coating layer provided on the flat area is thicker than the thickness of the first hard coating layer provided on the bending area,
Electronic devices. According to clause 16,
The plurality of coating units have a structure in which a second coating unit is stacked on an upper surface of the first coating unit,
The first hard coating layer is,
One surface of the first coating portion is in contact with one surface of the base layer,
An electronic device wherein the other surface of the first coating part is in contact with one surface of the second coating part. According to clause 16,
The plurality of coating portions include a first coating portion disposed in the bending area and a second coating portion disposed in the flat area,
The first hardness of the first coating portion is smaller than the second hardness of the second coating portion,
The first hard coating layer is,
An electronic device disposed so that a portion of a side surface of the first coating portion and a portion of a side surface of the second coating portion are in contact with each other. According to clause 16,
The plurality of coating units include a first coating unit and a second coating unit,
The first hardness of the first coating portion is smaller than the second hardness of the second coating portion,
The first hard coating layer is,
The first coating portion is disposed in the bending area,
The electronic device wherein the second coating part is disposed to cover the upper surface of the base layer and the periphery of the first coating part in the planar area. According to clause 16,
The window is,
The electronic device further includes a refractive index matching portion provided on the outer surface of the first hard coating layer.