KR20230168934A - Flexible display and electronic device including same - Google Patents

Abstract

A flexible display according to an embodiment includes a panel layer; and a cover layer disposed on one side of the panel layer. The cover layer includes a first part and a second part extending from the first part in a first direction, wherein the first part includes a first base part formed to a first thickness and a second part extending from the first base part. A first connection part extends and gradually decreases in thickness, wherein the second part includes a second base part connected to the first connection part and formed with a second thickness smaller than the first thickness, and extending in the first direction. It may include a reinforcement portion protruding from an edge of the second base portion facing in a second vertical direction. The reinforcement portion may include an edge portion that protrudes from a portion of the second base portion to have a third thickness, and a second connection portion that extends from the edge portion toward the second base portion and whose thickness gradually decreases.

Description

Flexible display and electronic device including same {FLEXIBLE DISPLAY AND ELECTRONIC DEVICE INCLUDING SAME}

Various embodiments disclosed in this document relate to flexible displays and electronic devices including the same.

The electronic device may have a flexible display. For example, the electronic device may include a foldable electronic device, a slideable electronic device, or a rollable electronic device. An electronic device may be transformed to expand or reduce a display area visually exposed to the outside of the electronic device. For example, a flexible display may be placed in an electronic device in a bendable, foldable, or rollable form.

When a flexible display is configured to perform sliding, bending, and/or rolling operations, a compressive load may be concentrated on an edge portion of the display when the electronic device is driven. As compressive load is concentrated, buckling may occur in the display, which may lead to delamination or damage to the display.

According to various embodiments disclosed in this document, the strength of the edge portion of the display can be improved by forming a reinforcement portion on the cover glass (eg, thin glass) applied to the display.

A flexible display according to an embodiment disclosed in this document includes a panel layer; and a cover layer disposed on one side of the panel layer. The cover layer includes a first part and a second part extending from the first part in a first direction, wherein the first part includes a first base part formed to a first thickness and a second part extending from the first base part. It includes a first connection part extending and gradually decreasing in thickness, wherein the second part includes a second base part connected to the first connection part and formed with a second thickness smaller than the first thickness, and extending in the first direction. It may include a reinforcement portion protruding from an edge of the second base portion facing in a second vertical direction. The reinforcement portion may include an edge portion that protrudes from a portion of the second base portion to have a third thickness, and a second connection portion that extends from the edge portion toward the second base portion and whose thickness gradually decreases.

A slideable electronic device according to an embodiment disclosed in this document includes a first structure; a second structure slidably connected to the first structure; and a display configured to change the size of an area exposed to the front of the electronic device in response to sliding of the second structure relative to the first structure, and formed in a stacked structure of a plurality of layers. The plurality of layers may include a panel layer and a cover layer disposed on one side of the panel layer, and the cover layer may include a first part and a second part extending from the first part in a first direction. there is. The first part includes a first base formed to a first thickness and a first connection part extending from the first base part and having a gradually decreasing thickness, and the second part is connected to the first connection part. and may include a second base portion formed to a second thickness smaller than the first thickness, and a reinforcement portion protruding from an edge of the second base portion facing a second direction perpendicular to the first direction. The reinforcement portion may include an edge portion that protrudes from a portion of the second base portion to have a third thickness, and a second connection portion that extends from the edge portion toward the second base portion and whose thickness gradually decreases.

A foldable electronic device according to an embodiment disclosed in this document includes a first housing; a second housing rotatably connected to the first housing; and a display disposed on the first housing and the second housing, configured to be partially folded or unfolded in response to relative rotation of the first housing and the second housing, and formed in a stacked structure of a plurality of layers. It can be included. The plurality of layers may include a panel layer and a cover layer disposed on one side of the panel layer, and the cover layer may include a first part and a second part extending from the first part in a first direction. there is. The first part includes a first base formed to a first thickness and a first connection part extending from the first base part and having a gradually decreasing thickness, and the second part is connected to the first connection part. and may include a second base portion formed to a second thickness smaller than the first thickness, and a reinforcement portion protruding from an edge of the second base portion facing a second direction perpendicular to the first direction. The reinforcement portion may include an edge portion that protrudes from a portion of the second base portion to have a third thickness, and a second connection portion that extends from the edge portion toward the second base portion and whose thickness gradually decreases.

Electronic devices according to various embodiments disclosed in this document can improve the strength of the edge portion of the display by forming a reinforcement portion on the cover glass (e.g., thin glass) applied to the display.

In addition, various effects that can be directly or indirectly identified through this document may be provided.

1 is a diagram showing a collapsed state of an electronic device according to an embodiment.
FIG. 2 is a diagram illustrating an expansion state of an electronic device according to an embodiment.
FIG. 3 is a diagram illustrating a display of an electronic device according to an embodiment.
FIG. 4 is a diagram illustrating a plurality of layers of a display according to an embodiment.
Figure 5 is a diagram showing a cover layer of a display according to an embodiment.
Figure 6 is an enlarged view showing a portion of the cover layer according to one embodiment.
Figure 7a is a diagram showing a longitudinal cross-section of a cover layer according to one embodiment.
Figure 7b is a diagram showing a cross-section in the width direction of a cover layer according to one embodiment.
FIG. 8A is a diagram illustrating a longitudinal cross-section of a display according to an embodiment.
FIG. 8B is a diagram illustrating a cross-section in the width direction of a display according to one embodiment.
FIG. 9A is a diagram illustrating a longitudinal cross-section of a second portion of the cover layer according to one embodiment.
FIG. 9B is a diagram illustrating a longitudinal cross-section of the second portion of the cover layer according to one embodiment.
Figure 10 is an enlarged view showing a portion of the cover layer according to one embodiment.
Figure 11a is a diagram showing a longitudinal cross-section of a cover layer according to one embodiment.
Figure 11b is a diagram showing a cross-section in the width direction of a cover layer according to one embodiment.
FIG. 12 is a diagram illustrating a cover layer of a display according to an embodiment.
Figure 13 is an enlarged view showing a portion of the cover layer according to one embodiment.
FIG. 14A is a diagram illustrating a longitudinal cross-section of the second portion of the cover layer according to one embodiment.
FIG. 14B is a diagram illustrating a cross-section in the width direction of the second portion of the cover layer according to one embodiment.
Figure 15 is a diagram showing a cross-section in the width direction of a display according to one embodiment.
FIG. 16A is a diagram illustrating an electronic device according to an embodiment.
FIG. 16B is a diagram illustrating an electronic device according to an embodiment.
FIG. 17 is a diagram showing a cover layer of a display included in the electronic device of FIGS. 16A and 16B.
Figure 18 is a flowchart illustrating a method of manufacturing a cover layer of a display according to an embodiment.
FIG. 19 is a diagram showing some operations of the manufacturing method of FIG. 18.
FIG. 20A is a diagram showing some operations of the manufacturing method of FIG. 18.
FIG. 20B is a diagram showing some operations of the manufacturing method of FIG. 18.
Figure 21 is a block diagram of an electronic device in a network environment according to various embodiments.
In relation to the description of the drawings, identical or similar reference numerals may be used for identical or similar components.

Hereinafter, various embodiments of the present invention are described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives to the embodiments of the present invention.

1 is a diagram showing the basic state of an electronic device according to an embodiment. FIG. 2 is a diagram illustrating an expansion state of an electronic device according to an embodiment.

Referring to FIGS. 1 and 2 , the electronic device 100 according to one embodiment may include a first structure 110, a second structure 120, and a display 130.

The electronic device 100 of FIGS. 1 and 2 may be a slideable type or rollable type electronic device, and may be in a default state (e.g., closed mode, reduced mode, or slide-in mode). in) mode) and extended states (e.g., open mode or slide-out mode). The basic state and extended state of the electronic device 100 may be determined according to the relative position of the second structure 120 with respect to the first structure 110. The electronic device 100 may be transformed between the basic state and the extended state by user manipulation or mechanical operation.

The basic state may mean a state in which the area (or size) of the display 130 visually exposed to the front of the electronic device 100 (e.g., the side facing the +z-axis direction) is relatively reduced. The expanded state may mean that the area (or size) of the display 130 visually exposed to the front of the electronic device 100 is relatively expanded. For example, the area of the display 130 visually exposed to the front of the electronic device 100 in the expanded state may be larger than that of the basic state, and the display visually exposed to the front of the electronic device 100 ( The area of 130) may reach its maximum size when the electronic device 100 is in an expanded state. The electronic device 100 may be transformed through a plurality of intermediate states defined between the basic state and the extended state. For example, the plurality of intermediate states may mean a plurality of states in which the area of the display 130 visually exposed to the front is larger than the basic state and smaller than the extended state.

The basic state is that the first side 122 and the second side 124 of the second structure 120 are located inside the first structure 110, so that the second structure 120 is attached to the first structure 110. It may be in a closed state. The extended state is such that the first side 122 and the second side 124 of the second structure 120 come out of the first structure 110, so that the second structure 120 is open with respect to the first structure 110. It may be an open state.

The first structure 110 and the second structure 120 may be coupled to enable sliding operations relative to each other. The second structure 120 may be slidably coupled to one side of the first structure 110. For example, the first structure 110 may be a fixed structure, and the second structure 120 may be a structure that can move relative to the first structure 110. The second structure 120 is positioned on one side (e.g., S2) of the first structure 110 to enable sliding in both directions (S1, S2) (e.g., +x/-x axis direction) with respect to the first structure 110. +x-axis direction).

According to various embodiments, the first structure 110 may mean a fixed structure, a fixed housing, a fixed case, or a main body. The second structure 120 may mean a sliding structure, a sliding member (slider), a sliding housing, a sliding case, or a sliding body.

The electronic device 100 may be transformed into a basic state and an expanded state as the second structure 120 slides with respect to the first structure 110 . For example, the electronic device 100 in the basic state (e.g., the state of FIG. 1) is in an extended state (e.g., the state of FIG. 1) by moving the second structure 120 in the first direction S1 with respect to the first structure 110. It can be transformed into the state of Figure 2). Conversely, the electronic device 100 in the expanded state may be transformed to the basic state as the second structure 120 moves in the second direction S2 with respect to the first structure 110.

The display 130 may change the size of the area exposed to the front of the electronic device 100 in response to the sliding motion of the second structure 120. The display 130 is supported by at least one of the first structure 110 and the second structure 120, and at least a portion of the display 130 rotates and/or moves linearly based on the sliding motion of the second structure 120. The area exposed to the front of the electronic device 100 may be configured to expand or contract. The display 130 may include at least a partially flexible portion. For example, the display 130 may be a flexible display.

The display 130 may include a basic area 130a and an extension area 130b extending from the basic area 130a in one direction (eg, -x-axis direction based on the drawing). The basic area 130a may form the front surface of the electronic device 100. For example, the basic area 130a may remain exposed to the front regardless of the state of the electronic device 100. The area of the expansion area 130b exposed to the front of the electronic device 100 may vary depending on the state of the electronic device 100. For example, the extended area 130b may form the front surface of the electronic device 100 together with the basic area 130a in any of the states between the basic state and the extended state and in the extended state. The area of the expansion area 130b exposed to the front of the electronic device 100 may vary depending on the distance that the second structure 120 slides with respect to the first structure 110. For example, in the basic state, as the second structure 120 moves in the first direction S1, the size of the extended area 130b exposed to the front of the electronic device 100 may gradually increase. there is. Conversely, when in the expanded state, as the second structure 120 moves in the second sliding direction S2, the size of the expanded area 130b exposed to the front of the electronic device 100 may gradually decrease.

The basic area 130a and the extended area 130b of the display 130 may be areas divided based on whether they are exposed to the front of the electronic device 100 in the basic state. The basic area 130a may refer to a partial area of the display 130 that is visually exposed to the front of the electronic device 100 in the basic state. The expansion area 130b is located in the internal space of the first structure 110 in the basic state and is not exposed to the front of the electronic device 100, and at least a portion of the expansion area 130b falls out of the internal space of the first structure 110 in the expanded state. This may refer to another area of the display 130 that comes out and is visually exposed to the front of the electronic device 100. In the illustrated embodiment, the internal space of the first structure 110 is the plate portion 112, the longitudinal direction of the plate portion 112 (e.g., the direction perpendicular to the sliding directions S1 and S2 or the y-axis direction). It may be formed by a first side wall portion 114 and a second side wall portion 116 formed on the side.

In the embodiments disclosed in this document, the basic area 130a and the extended area 130b of the display 130 are not physically distinct areas, and do not mean that they have different shapes or properties. For example, the extended area 130b may be understood as referring to the entire area of the display 130 excluding the basic area 130a. In various embodiments, the basic area 130a may be understood as a fixedly exposed display area or a main display area, and the extended area 130b may be understood as a variably exposed display area or sub-display area.

According to the illustrated embodiment, the direction in which the expansion area 130b extends from the basic area 130a is the first sliding direction in which the second structure 120 moves when the electronic device 100 is expanded. It may be in the opposite direction of S1). For example, the extended area 130b may extend from the basic area 130a in the second sliding direction S2. As the second structure 120 slides with respect to the first structure 110, the expansion area 130b is drawn into the first structure 110 (e.g., a slide-in operation) or , may be pulled out of the first structure 110 (eg, in a slide-out operation).

However, the electronic device 100 and the display 130 are not limited to the illustrated embodiment. According to various embodiments, the electronic device 100 slides in the extended area 130b of the display 130 into the interior of the second structure 120 according to the sliding motion of the second structure 120, or slides into the second structure 120. It may be configured to slide out from the inside of the structure 120. In this embodiment, the expansion area 130b of the display 130 may extend from the basic area 130a in the first sliding direction S1. The expansion area 130b is located inside the second structure 120 in the basic state, and when transformed into the expanded state, it may exit from the inside of the second structure 120 and be exposed to the front of the electronic device 100. .

The display 130 is visually exposed to the front of the electronic device 100 and may form a screen display area on which predetermined visual information (or a screen) is displayed. For example, in the basic state, the screen display area may be formed by the basic area 130a. When in the expanded state, the screen display area may be formed by at least a portion of the expanded area 130b and the basic area 130a. In the expanded state, the electronic device 100 can display a screen in both the basic area 130a and a portion of the expanded area 130b, thereby providing a screen display area that is expanded than the basic state.

The basic state may include a state in which the size of the exposed area of the display 130 is a first size, and the extended state may include a state in which the size of the exposed area of the display 130 is a second size larger than the first size. You can. For example, the first size may be the minimum size of the exposed area of the display 130, and the second size may be the maximum size of the exposed area of the display 130. In a modified operation of the electronic device 100, a plurality of intermediate states may be defined between the basic state and the extended state. The plurality of intermediate states may include arbitrary states in which the size of the exposed area of the display 130 is larger than the first size in the basic state and smaller than the second size in the extended state.

The electronic device 100 can maintain its current modified state even if no external force is applied in the basic state and expanded state. In various embodiments, the electronic device 100 may be configured to maintain its shape even when no external force is applied in at least one of a plurality of intermediate states. For example, the electronic device 100 may be provided with at least one free-stop state between the basic state and the extended state, and in the free-stop state, the electronic device 100 may maintain the current state even without an external force.

FIG. 3 is a diagram illustrating a display of an electronic device according to an embodiment. FIG. 4 is a diagram illustrating a plurality of layers of a display according to an embodiment.

FIG. 3A shows the shape of the display 130 when the electronic device (eg, the electronic device 100 of FIGS. 1 and 2) is in a basic state. Figure 3(b) shows the shape of the display 130 when the electronic device 100 is in an expanded state. For example, FIG. 3(a) is a diagram in which the remaining components except the display 130 of the electronic device 100 of FIG. 1 are omitted, and FIG. 3(b) is a diagram of the electronic device 100 of FIG. 2. The drawing may omit the remaining components except for the display 130. FIG. 4 shows a stacked structure of a plurality of layers included in the display 130.

Referring to FIG. 3, the display 130 (e.g., the display 130 of FIGS. 1 and 2) of the electronic device 100 according to an embodiment includes a fixed portion 132 and a fixed portion ( It extends from 132 and may include a variable portion 134 whose shape is variable.

The fixed portion 132 may maintain a fixed shape regardless of the state of the electronic device 100. For example, at least a portion of the fixing portion 132 may be fixedly supported by a structure (eg, the second structure 120) of the electronic device 100. The variable part 134 may extend from the fixed part 132 to have a variable shape, and its shape may be partially changed as the state of the electronic device 100 is changed. For example, the variable portion 134 may partially rotate and move linearly in response to an operation in which the state of the electronic device 100 is changed, and at least a portion of the variable portion 134 may be transformed into a flat or curved surface.

The variable part 134 may include a rolling part 136 whose shape changes while rotating and linearly moving as the state of the electronic device 100 changes, and an extension part 138 extending from the rolling part 136. The extension portion 138 may extend from the rolling portion 136 to face the fixed portion 132 or the rolling portion 136 depending on the state of the electronic device 100, and may maintain a flat shape. . For example, the rolling portion 136 may be disposed between the fixed portion 132 and the extending portion 138, and the extending portion 138 is relatively small compared to the fixed portion 132 and the rolling portion 136. It can be formed in size (or area).

However, the shape of the display 130 is not limited to the illustrated embodiment. According to various embodiments, the variable portion 134 of the display 130 may not include the extended portion 138 and may be formed entirely as a rolling portion 136. Additionally, according to various embodiments, the display 130 extends so that the extended portion 138 has a smaller width (e.g., a distance measured in the x-axis direction) from the rolling portion 136 than the embodiment shown in FIG. It could be.

The fixing portion 132 may form a substantially flat surface. For example, the fixing portion 132 may maintain a shape in which most areas are flat, but one edge area is curved. The variable portion 134 may be partially transformed into a curved or flat surface when the display 130 slides in or out according to a change in the state of the electronic device 100. For example, the fixing portion 132 may maintain a substantially planar shape in the basic state (eg, the state in FIG. 1) and the expanded state (eg, the state in FIG. 2) of the electronic device 100. In the basic state, the variable portion 134 has a portion of the rolling portion 136 adjacent to the fixed portion 132 forming a curved surface, and the remainder (e.g., the remaining portion of the rolling portion 136 and the extended portion 138) is a fixed portion. A plane can be formed by facing (132). In the expanded state, the variable portion 134 forms a flat surface with a portion of the rolling portion 136 adjacent to the fixed portion 132 arranged in parallel with the fixed portion 132, and the remainder of the rolling portion 136 forms a curved surface. You can. The extended portion 138 of the variable portion 134 may be maintained flat and parallel to the fixed portion 132 in the basic state and the extended state.

According to the embodiment shown in FIGS. 1 to 3, the fixed part 132 may form a basic area (e.g., basic area 130a in FIGS. 1 and 2) together with a portion of the variable part 134. . The remaining portion of the variable portion 134 may form an extended area (eg, extended area 130b in FIG. 2). For example, the surface of the fixed portion 132 and the surface of a portion of the variable portion 134 may form the basic region 130a. According to the illustrated embodiment, a portion of the variable portion 134 may be included in the basic area 130a, and the remaining portion of the variable portion 134 may be included in the extended area 130b. However, the illustrated embodiment is an illustrative example, and according to various embodiments, in the basic state, the variable portion 134 of the display 130 is configured with a first structure (e.g., Figure 1) so as not to be exposed to the front of the electronic device 100. and the first structure 110 of FIG. 2). In this case, it can be understood that the basic area 130a is formed by the fixed part 132, and the extended area 130b is formed by the variable part 134.

Referring to FIG. 4, the display 130 according to one embodiment may include a plurality of layers. For example, the display 130 may be formed in a structure in which a plurality of layers 140, 150, 160, and 170 are stacked. The fixed part 132 and the variable part 134 of the display 130 described with reference to FIG. 3 are divided along the width direction (e.g., x-axis direction) of the display 130 based on whether the shape is variable. , both the fixed part 132 and the variable part 134 may be composed of a plurality of layers having a stacked structure. For example, one part (or section) of each of the plurality of layers is included in the fixed part 132 of the display 130, and another part (or section) is included in the variable part 134 of the display 130. You can.

The plurality of layers constituting the display 130 may include a panel layer 140, a reinforcement layer 150, a cover layer 160, a first protective layer 172, and/or a second protective layer 174. You can. For example, a reinforcement layer 150, a cover layer 160, and a protection layer 170 may be sequentially stacked on top of the panel layer 140, and the protection layer 170 may be placed on the outside of the electronic device 100. The surface of the display 130 exposed can be formed.

However, the stacked structure of the display 130 shown in FIG. 4 is illustrative and is not limited thereto. According to various embodiments, the display 130 may omit at least one of the first protection layer 172 and the second protection layer 174. Additionally, according to various embodiments, the display 130 may further include an additional protective film (not shown), and the protective film may be attached to be removable when the electronic device 100 is used.

The panel layer 140 may display a designated screen and/or image related to the operation and/or function of the electronic device 100. The panel layer 140 includes a pixel layer (not shown) containing a plurality of light-emitting elements, an encapsulation layer (not shown) that seals the light-emitting elements, a touch sensor layer (not shown) containing a touch electrode, and an electrical connection between the light-emitting elements and the light-emitting elements. It may include a wiring layer (not shown) including a transistor connected to and/or a polarizing layer (not shown) that prevents reflection of external light to ensure visibility. For example, the polarizing layer may include a poly ethylene terephthalate (PET) film, a tri-acetyl cellulose (TAC) film, a cycle-olefin polymer (COP) film, or a poly-vinyl alcohol (PVA) film. The stacked structure of the panel layer 140 is not limited to the above-described example, and the panel layer 140 may additionally include other layers.

The panel layer 140 includes at least one of a liquid crystal display (LCD) panel, a light emitting diode (LED) display panel, an organic light emitting diode (OLED) display panel, a microelectromechanical system (MEMS) display panel, a transparent display panel, and an electronic paper display panel. It can contain one.

The reinforcement layer 150 and the cover layer 160 may be disposed between the panel layer 140 and the protective layer 170. The reinforcement layer 150 may be disposed between the panel layer 140 and the cover layer 160, and the cover layer 160 may be disposed between the reinforcement layer 150 and the protection layer 170. The reinforcement layer 150 and the cover layer 160 may be formed of a light-transmitting material that allows light emitted from the panel layer 140 to pass through. The reinforcement layer 150 may be adhered to the cover layer 160 and the panel layer 140. For example, the reinforcement layer 150 may combine the cover layer 160 and the panel layer 140. Reinforcement layer 150 may be formed of transparent adhesive and/or transparent resin. For example, the reinforcement layer 150 may be made of optical clear resin (OCR), optical clear adhesive (OCA), pressure sensitive adhesive (PSA), or photosensitive adhesive (e.g., UV resin). may include.

The cover layer 160 has a first side 160a facing the panel layer 140 (e.g., a side facing the -z axis direction) and a second side 160b facing opposite to the first side 160a (e.g. + may include a side facing the z-axis direction). A reinforcement layer 150 may be attached to the first side 160a of the cover layer 160, and a protective layer 170 (e.g., a first protective layer (160a) may be attached to the second side 160b of the cover layer 160. 172)) can be attached.

The cover layer 160 may be formed of glass or polymer film. For example, the cover layer 160 may be formed of ultra-thin glass (UTG) material, PI material, or PET material. The cover layer 160 may be partially formed to have different thicknesses. For example, the cover layer 160 may be formed to have different thicknesses corresponding to the fixed portion 132 and the variable portion 134 of the display 130. Additionally, the cover layer 160 may have an edge portion thicker than a center portion within a region corresponding to the variable portion 134 . The specific shape of the cover layer 160 will be described in detail below with reference to FIGS. 5 to 7B.

The reinforcement layer 150 may compensate for the difference in thickness of the cover layer 160 and the panel layer 140 and improve the strength of the display 130. The reinforcement layer 150 may be formed to have different thicknesses corresponding to the shape of the cover layer 160. For example, the reinforcement layer 150 is formed to correspond to the thickness of the cover layer 160, so that the reinforcement layer 150 and the cover layer 160 can form a uniform plane. The reinforcement layer 150 may compensate for changes in the thickness of the cover layer 160 so that an empty space (eg, an air gap or an air layer) is not formed between the panel layer 140 and the cover layer 160. Through this, the visibility of the panel layer 140 can be improved and/or supplemented. The specific shape of the reinforcement layer 150 will be described in detail together with the cover layer 160 with reference to FIGS. 8A and 8B.

The protective layer 170 may form one surface of the display 130 . The protective layer 170 may be disposed (or adhered) to one side (e.g., the second side 160b) of the cover layer 160, and protect other layers (e.g., other layers included in the display 130) from external shock. : The cover layer 160, reinforcement layer 150, and panel layer 140) can be protected. For example, the protection layer 170 can protect the thin cover layer 160 and prevent scattering when a crack occurs in the cover layer 160. The protective layer 170 may include a glass material, or may be composed of a film layer or a coating layer. The protective layer 170 may include a flexible material. The protective layer 170 may be formed of a transparent material with high light transmittance.

The protective layer 170 can prevent the cover layer 160 from being contaminated by dust or oil. For example, the protective layer 170 may include an anti-smudge coating or an anti-fingerprint coating that prevents traces, such as fingerprints, from forming on the surface of the cover layer 160 due to user contact. may include.

The protection layer 170 may include a first protection layer 172 and a second protection layer 174. The first protective layer 172 may be laminated on top of the cover layer 160, and the second protective layer 174 may be laminated on top of the first protective layer 172. For example, the cover layer 160 is disposed between the first protective layer 172 and the reinforcement layer 150, and the first protective layer 172 is disposed between the cover layer 160 and the second protective layer 174. can be placed in An adhesive layer (not shown) may be disposed between the first protective layer 172 and the cover layer 160 and between the second protective layer 174 and the second protective layer 174 to adhere them. One side of the second protective layer 174 may form the surface of the display 130 exposed to the outside of the electronic device 100. According to various embodiments, the first protective layer 172 may be composed of a protective film layer made of a flexible material, and the second protective layer 174 may be composed of a hard coating layer or an anti-fingerprint coating layer. The illustrated embodiment is an example, and the protective layer 170 may include only one of the first protective layer 172 and the second protective layer 174, and the display 130 may not include the protective layer 170. Maybe not.

Figure 5 is a diagram showing a cover layer of a display according to an embodiment. Figure 6 is an enlarged view showing a portion of the cover layer according to one embodiment.

FIG. 5 shows a cover layer (e.g., facing the panel layer (e.g., panel layer 150 of FIG. 4) based on the stacked structure of the display shown in FIG. 4 (e.g., display 130 of FIGS. 1 to 4). : This is a top view of the first side (e.g., the first side 160a of FIG. 4) of the cover layer 160 of FIG. 4 from above. For example, FIG. 5 may be a diagram showing the shape of the cover layer 160 when the display 130 shown in FIG. 3 is unfolded flat.

FIG. 6 is an enlarged view of portion E of the cover layer 160 shown in FIG. 5.

Referring to FIGS. 5 and 6 , the cover layer 160 of the display 130 according to one embodiment has a first direction (e.g., x-axis direction) and a second direction perpendicular to each other on the surface of the display 130. It can be formed in a shape whose thickness changes along (e.g., y-axis direction). The first direction and the second direction may be defined as directions parallel to the width direction (W) and the length direction (W) of the cover layer 160, respectively. For example, the cover layer 160 may have a thickness change along the width direction (W) and the length direction (L) of the cover layer 160 (or display 130). For example, one part of the cover layer 160 disposed along the width direction W may have a different thickness from another part. Additionally, one part and another part of the cover layer 160 disposed along the longitudinal direction L may have different thicknesses.

In the embodiments disclosed in this document, the width direction (W) is a direction parallel to the sliding direction (e.g., sliding directions (S1, S2) of FIGS. 1 to 3) of the electronic device 100, and the longitudinal direction (L) ) may be perpendicular to the sliding directions S1 and S2, but may be parallel to the surface of the cover layer 160 (eg, the first surface 160a or the second surface 160b). Thickness may be a distance measured in a direction perpendicular to the width direction (W) and the length direction (L). For example, the thickness of the cover layer 160 may be defined as a distance measured in a direction perpendicular to the first side 160a (or the second side 160b) of the cover layer 160.

The cover layer 160 may include a first part 161 and a second part 162 extending from the first part 161. When the electronic device 100 is driven, the first part 161 may remain fixed in shape without being deformed, and the shape of the second part 162 may be deformed. For example, when the display 130 slides according to the driving of the electronic device 100, the first part 161 may be maintained flat without being deformed, and the second part 162 may be partially curved or It can be transformed into a flat surface.

The first part 161 may correspond to the fixed part 132 of the display 130, which has a fixed shape, and the second part 162 corresponds to the variable part 134 of the display 130, which has a variable shape. It can be. For example, the first part 161 of the cover layer 160 is a part (or section) included in the fixed part 132 of the display 130, and the second part 162 of the cover layer 160 is It may be a part (or section) included in the variable part 134 of the display 130. When looking at the display 130 of FIG. 3, the first part 161 is a part located in the fixed part 132 (or a part that overlaps the fixed part 132) of the entire cover layer 160, The second part 162 may be understood as a part located in the variable part 134 (or a part that overlaps the variable part 134) of the entire cover layer 160.

The first part 161 may include a first base part 163 and a first connection part 164 extending from the first base part 163 and connected to the second part 162. The first connection portion 164 connects the first base portion 163 and the second portion 162, and its thickness may gradually decrease toward the second portion 162. For example, the first connection portion 164 includes a first base portion 163 having a first thickness and a second base portion 165 of the second portion 162 having a second thickness smaller than the first thickness. , it can be connected obliquely. According to various embodiments, the first connection portion 164 may be formed to have a designated inclination.

The second portion 162 may include a second base portion 165 and reinforcing portions 166 protruding from both edge portions of the second base portion 165 in the longitudinal direction (L). The reinforcement portion 166 includes a first reinforcement portion 166a protruding from an edge portion of one side (e.g., +y-axis direction) of the second base portion 165 and the other side of the second base portion 165 (e.g., : -y-axis direction) may include a second reinforcement portion 166b protruding from the edge portion. The first reinforcement part 166a and the second reinforcement part 166b may be formed to have substantially the same shape. For example, the first reinforcement part 166a and the second reinforcement part 166b may be symmetrical with respect to the center of the second base part 165. Figure 6 is an enlarged view of one edge of the cover layer 160 on which the second reinforcement portion 166b is formed, but also shows the other edge of the cover layer 160 on which the first reinforcement portion 166a is formed. may be the same.

The reinforcement portion 166 may extend from at least a portion of the surface of the second base portion 165 (eg, surface 165s in FIGS. 7A and 7B) to have a specified thickness. For example, the reinforcement portion 166 may protrude on the surface 165s of the second base portion 165 in a direction substantially perpendicular to the surface 165s. The surface 165s of the second base portion 165 is a portion of the first surface 160a of the cover layer 160 that corresponds to the second base portion 165.

The reinforcement portion 166 extends from the edge portion 167 and the edge portion 167 forming the edge in the longitudinal direction (L) of the second portion 162 and is connected to the surface 165s of the second base portion 165. It may include a second connection portion 168. The second connection portion 168 connects the edge portion 167 and the surface 165s of the second base portion 165, and the thickness increases from the edge portion 167 to the surface 165s of the second base portion 165. may gradually decrease. For example, the second connection portion 168 includes an edge portion 167 protruding to a third thickness from a portion of the surface 165s of the second base portion 165 and the surface of the second base portion 165 ( Some other areas of 165s) can be connected obliquely. According to various embodiments, the second connection portion 168 may be formed to have a designated slope.

According to various embodiments, at least a portion of the second portion 162 of the cover layer 160 may maintain a bent state regardless of the state of the electronic device 100. For example, when the state of the electronic device 100 is changed, at least a portion of the variable portion 134 of the display 130 may move while maintaining its curved state without being deformed into a flat surface in a sliding operation, and thus At least a portion of the corresponding second portion 162 may remain bent. In the above embodiment, the reinforcing portion 166 may not be formed in the bending holding portion of the second portion 162 of the cover layer 160 that maintains the bent state. Accordingly, the tensile stress applied to the bending holding portion can be reduced and fatigue failure can be prevented or reduced.

One end of the reinforcement portion 166 may be connected to the first portion 161. For example, one end (eg, an end in the +x-axis direction) of the reinforcement part 166 adjacent to the boundary between the first part 161 and the second part 162 may be connected to the first part 161. According to the illustrated embodiment, the reinforcement portion 166 and the first portion 161 may form substantially the same plane. For example, the edge portion 167 of the reinforcement portion 166 may be connected to the first base portion 163 while forming substantially the same plane. The sum of the second thickness of the second base portion 165 (e.g., T2 in FIGS. 7A and 7B) and the third thickness of the edge portion 167 (e.g., T3 in FIG. 7A) is the first base portion 163. It may be substantially the same as the first thickness (e.g., T1 in FIG. 7B). However, the illustrated embodiment is an example, and according to various embodiments, the first base portion 163 may be formed to protrude further than the reinforcement portion 166 based on the surface of the second base portion 165. (e.g. see Figures 9, 10A and 10B).

The display 130 according to an embodiment disclosed in this document includes a part (e.g., fixed part 132) whose shape (or shape) is maintained regardless of the state of the electronic device 100 and the electronic device 100. The thickness of the cover layer 160 is formed differently depending on the part whose shape is changed (e.g., the variable part 134) based on the state of the display, thereby improving the flexibility of the display 130 and enabling sliding (or bending) operation. resistance can be reduced.

The display 130 according to an embodiment disclosed in this document is a portion (e.g., a second portion of the cover layer 160 corresponding to the variable portion 134 whose shape is changed based on the state of the electronic device 100). By forming the cover layer 160 to have different thicknesses along the longitudinal direction (L) on the portion 162), the strength of the longitudinal edge portion of the display 130 is improved and peeling or damage due to buckling is improved. can be prevented.

Figure 7a is a diagram showing a longitudinal cross-section of a cover layer according to one embodiment. Figure 7b is a diagram showing a cross-section in the width direction of a cover layer according to one embodiment.

FIG. 7A is a cross-sectional view taken along line A-A' of the cover layer 160 shown in FIG. 5. FIG. 7B is a cross-sectional view taken along line B-B' of the cover layer 160 shown in FIG. 5. For example, FIG. 7A may be a longitudinal cross-sectional view of the second portion 162 of the cover layer 160, and FIG. 7B may be a longitudinal cross-sectional view of the first portion 161 and the second portion 162 of the cover layer 160. It may be a cross-sectional view in the width direction.

5, 7A, and 7B, the cover layer 160 according to one embodiment includes a first part 161 and a second part extending from the first part 161 in the width direction (W). 162) may be included. As shown in FIG. 7B, the first portion 161 includes a first base portion 163 and a first base portion 163 and a second portion 162 (e.g., a second base portion 165). It may include a first connection portion 164 disposed therebetween. As shown in FIG. 7A, the second portion 162 protrudes (or, It may include a reinforcing part 166 that extends. The reinforcement part 166 may include a first reinforcement part 166a and a second reinforcement part 166b formed on both sides of the second base part 165 in the longitudinal direction (eg, y-axis direction).

The first base portion 163 of the first portion 161 may be formed to have a first thickness T1. The second base portion 165 of the second portion 162 may be formed to have a second thickness T2. The first connection portion 164 of the first portion 161 may be disposed between the first base portion 163 and the second base portion 165. The first connection part 164 may be a part whose thickness is changed between the first base part 163 and the second base part 165, and the second base part 165 may be formed from the boundary part with the first base part 163. ) may gradually decrease from the first thickness (T1) to the second thickness (T2) toward the border. The first connection portion 164 inclined the surface of the first base portion 163 (e.g., the surface facing the -z-axis direction) and the surface of the second base portion 165 (e.g., the surface facing the -z-axis direction). It may include a first inclined surface 164s connecting it. The first inclined surface 164s may be formed to have a first inclined angle A1.

The reinforcement portion 166 of the second portion 162 may be formed to have a third thickness T3. For example, the edge portion 167 of the reinforcement portion 166 protrudes or extends from the surface 165s of the second base portion 165 by a third thickness T3 in a direction substantially perpendicular to the surface 165s. The thickness of the second connection portion 168 may gradually decrease from the edge portion 167 to the surface 165s of the second base portion 165. For example, the second connection portion 168 may include a second inclined surface 168s that obliquely connects the surface 167s of the edge portion 167 and the surface 165s of the second base portion 165. The second inclined surface 168s may be formed to have a second inclined angle A2. In the illustrated embodiment, the second inclined surface 168s may be formed as a flat surface, but this is an example and according to various embodiments, the second inclined surface 168s may be formed as a curved surface (e.g., FIGS. 15A and 15A and see Figure 15b).

According to the embodiment of FIGS. 5, 7A, and 7B, the surface 167s of the edge portion 167 and the surface 163s of the first base portion 163 may form substantially the same plane. For example, the first thickness T1 of the first base portion 163 is the second thickness T2 of the second base portion 165 and the reinforcement portion 166 (e.g., the edge portion 167). It may be substantially equal to the sum of the third thickness T3.

The cover layer 160 according to the embodiment disclosed in this document can improve the strength and peeling phenomenon at the edge of the display 130 by forming a reinforcement portion 166. The effect of improving buckling resistance and preventing peeling due to an increase in the thickness of the reinforcement portion 166 can be shown in Table 1 below.

Thickness ratio of reinforcement section existing 10% 20% 30% 40% 50% Buckling critical load 100% 133% 173% 220% 274% 338% Bending amount 100% 97% 94% 92% 89% 86%

Table 1 above shows the results of measuring the buckling critical load and bending amount when the thickness of the reinforcement portion 166 (for example, the edge portion 167) was increased. For example, the thickness ratio of the reinforcement part is the ratio of the third thickness T3 of the edge part 167 to the second thickness T2 of the second base part 165, and the reinforcement part 166 is formed. 10% means that the ratio of the third thickness (T3) to the second thickness (T2) is 10%, and 50% means that the third thickness (T3) is equal to the second thickness (T2). It means half. Referring to Table 1, it can be seen that increasing the thickness of the reinforcement portion 166 increases the buckling critical load for compressive load and thus improves buckling resistance. In addition, referring to Table 1, it can be seen that when the same compressive load is applied, the amount of bending decreases as the thickness of the reinforcement portion 166 increases, and the effect of preventing peeling and breakage is improved accordingly. First connection portion ( The first inclined surface 164s of the 164) and the second inclined surface 168s of the second connection part 168 may be formed to have different inclinations. The first inclination angle A1 of the first inclined surface 164s and the second inclination angle A2 of the second inclined surface 168s may be different from each other. For example, the first inclination angle A1 may be smaller than the second inclination angle A2. However, this is an example, and according to various embodiments, the first inclination angle A1 and the second inclination angle A2 may be the same.

The first inclination angle A1 of the first inclined surface 164s of the first connecting part 164 may be determined in consideration of visibility, and the second inclined surface 168s of the second connecting part 168 may be determined by considering the repulsive force during sliding operation. Thus, the second inclination angle A2 can be determined. For example, if the first inclination angle A1 is too large, the inclined shape of the first inclined surface 164s may be visible when viewing the display 130. Since the second inclination angle A2 is an edge portion of the display 130 and may be obscured by a printed layer formed on the outside of the protection layer (e.g., the protection layer 170 in FIG. 4), the upper limit value considering visibility is the first It may be larger than the inclination angle (A1). If the second tilt angle A2 is too small, the sliding (or bending, folding) performance of the display 130 may deteriorate due to increased repulsive force and/or driving resistance. Equations for determining or calculating the first inclination angle A1 and the second inclination angle A2 will be described in detail below with reference to FIGS. 8A and 8B.

FIG. 8A is a diagram illustrating a longitudinal cross-section of a display according to an embodiment. FIG. 8B is a diagram illustrating a cross-section in the width direction of a display according to one embodiment.

FIG. 8A may be a longitudinal (L) cross-sectional view of the cover layer 160 shown in FIG. 7A, in which a reinforcement layer 150, a panel layer 140, and a protection layer 170 are additionally disposed at the bottom and top. there is.

FIG. 8B may be a cross-sectional view in the width direction (W) of the cover layer 160 shown in FIG. 7B, in which a reinforcement layer 150, a panel layer 140, and a protection layer 170 are additionally disposed at the bottom and top. there is.

Referring to FIGS. 8A and 8B, the display 130 according to an embodiment may be composed of a stacked structure of a plurality of layers, and the plurality of layers include a panel layer 140, a reinforcement layer 150, and a cover layer ( 160), and may include a first protective layer 172 and a second protective layer 174. The reinforcement layer 150 and the panel layer 140 may be attached to the first side 160a (e.g., the side facing the -z axis direction) of the cover layer 160, and the protective layer 170 may be attached to the cover layer 160. ) may be attached to the second surface 160b (e.g., the surface facing the +z-axis direction).

The panel layer 140, the reinforcement layer 150, and the protection layer 170 of the plurality of layers include the panel layer (e.g., the panel layer 140 of FIG. 4) and the reinforcement layer (e.g., FIG. 4) described with reference to FIG. may be substantially the same as the reinforcement layer 150) and the protective layer (e.g., the protective layer 170 of FIG. 4). Hereinafter, overlapping descriptions will be omitted.

The reinforcement layer 150 is disposed between the cover layer 160 and the panel layer 140, and both sides may be adhered to the cover layer 160 and the panel layer 140, respectively. The reinforcement layer 150 may be formed in a shape that corresponds to the change in thickness of the cover layer 160 so as to fill the space between the cover layer 160 and the panel layer 140. For example, the reinforcement layer 150 may be combined with the cover layer 160 to form a layer disposed between the protective layer 170 and the panel layer 140 to have a uniform thickness. The reinforcement layer 150 compensates for the difference in thickness of the cover layer 160, so that when the cover layer 160 is combined (or adhered) to the panel layer 140, an air layer (e.g., air gap) is created between them. may not be formed.

As shown in FIG. 8A, the reinforcement layer 150 is connected to the first thickness compensation part 151 corresponding to the edge part 167 of the reinforcement part 166 and the second connection part 168 of the reinforcement part 166. It may include a corresponding second thickness compensating part 153 and a third thickness compensating part 155 corresponding to the second base part 165 of the second part 162. The second thickness compensating part 153 may gradually become thicker from the first thickness compensating part 151 to the third thickness compensating part 155. The second thickness compensation part 153 may be formed in an inclined shape corresponding to the second inclined surface 168s of the second connection part 168. In various embodiments, the second thickness compensation part 153 may be changed to correspond to the shape of the second connection part 168.

As shown in Figure 8b, the reinforcement layer 150 includes a fourth thickness compensation portion 157 corresponding to the first base portion 163 of the first portion 161 of the cover layer 160, and a first portion ( It may include a fifth thickness compensation part 159 corresponding to the first connection part 164 of 161) and a third thickness compensation part 155 corresponding to the second base part 165 of the second part 162. there is. The fifth thickness compensating part 159 may gradually become thicker from the fourth thickness compensating part 157 to the third thickness compensating part 155. The fifth thickness compensation part 159 may be formed in an inclined shape corresponding to the first inclined surface 164s of the first connection part 164. In various embodiments, the fifth thickness compensation part 159 may be changed to correspond to the shape of the first connection part 164.

According to the embodiment shown in FIG. 8B, the first connection portion 164 may include a first inclined surface 164s, and the first inclination angle A1 of the first inclined surface 164s is based on Equation 1 below This can be decided.

In Equation 1 above, O/A is the width of the distortion area, d1 is the width of the first inclined surface 164s, d2 is the height of the first inclined surface 164s, and n1 is the refractive index of the cover layer 160. , n2 is the refractive index of the reinforcement layer 150, and t1 represents the maximum thickness of the cover layer 160 (eg, the thickness of the first base portion 163). The first inclination angle A1 of the first inclined surface 164s is It can be defined as: For example, the first inclination angle A1 may be determined based on the width of the distortion area in which the first inclination surface 164s is not visible to the naked eye based on Equation 1.

In various embodiments, the first inclined surface 164s may not be visible to the naked eye when the width of the distortion area is less than about 0.13 mm, and the first inclined angle A1 is based on Equation 1 based on the above range. It can be calculated as: According to various embodiments, the first inclination angle A1 may be about 1° or more and about 10° or less, but is not limited thereto.

According to the embodiment shown in FIG. 8B, the second connection portion 168 may include a second inclined surface 168s, and the second inclination angle A2 of the second inclined surface 168s is Equation 2 and the following equation It can be determined based on Equation 3.

In Equation 2 above, F is the repulsion force, E is the Young's modulus of the material (e.g. glass) forming the cover layer 160, is the secondary moment of inertia of the second part 162 (e.g., bending part), R is the bending radius of the second part 162, represents the thickness of the variable portion 134 of the display 130.

In Equation 3 above, w1 is the distance between the reinforcement portions 166 (e.g., length in the y-axis direction), w2 is the width of the edge portion 167 of the reinforcement portion 166, and a is the reinforcement portion 166. is the width of the second connection portion 168, t2 is the thickness of the second base portion 165, t3 is the thickness of the reinforcement portion 166, and t4 is the thickness of the second base portion 165 and the reinforcement portion 166. It represents the sum of the thicknesses. For example, a may be the width of the second inclined surface 168s, and t3 may be the height of the second inclined surface 168s.

The second inclination angle A2 of the second inclined surface 168s is It can be defined as and can be determined based on Equation 2 and Equation 3 above. According to various embodiments, the second inclination angle A2 may be about 0.01° or more and about 0.6° or less, but is not limited thereto.

In the case of an embodiment in which the first base portion 163 of the first portion 161 and the edge portion 167 of the reinforcement portion 166 are formed at the same height, the height of the second base portion 165 and the reinforcement portion 166 The sum of the thicknesses may be substantially equal to the thickness of the first base portion 163, and t4 may be equal to t1 in Equation 1.

FIG. 9A is a diagram illustrating a longitudinal cross-section of a second portion of the cover layer according to one embodiment. FIG. 9B is a diagram illustrating a longitudinal cross-section of the second portion of the cover layer according to one embodiment.

FIGS. 9A and 9B show a second connection portion (e.g., the second connection portion 168 of FIGS. 6 and 7A) in the cover layer (e.g., the cover layer 160 of FIGS. 6 and 7A) described with reference to the previous drawings. ) is a diagram showing the cover layers 160' and 160'' according to an embodiment in which the second inclined surface (e.g., the second inclined surface 168s in FIGS. 6 and 7A) is changed from a flat surface to a curved surface.

Referring to FIGS. 9A and 9B, in one embodiment, the second portions 162' and 162'' of the cover layers 160' and 160'' include a second base portion 165 and a second base portion ( It may include a reinforcement portion 166 protruding from 165). The reinforcement portion 166 may include an edge portion 167 with a constant thickness and second connection portions 168' and 168'' that extend from the edge portion 167 and gradually decrease in thickness. The description of the structure and configuration of the cover layer 160 described above with reference to the preceding drawings may be equally applied to the cover layers 160' and 160'' shown in FIGS. 9A and 9B.

The second connection portions 168', 168'' of the cover layers 160', 160'' shown in FIGS. 9A and 9B, unlike the cover layer 160 shown in FIG. 7A, have an inclined plane (e.g. : It may include a concave surface 168s' or a convex surface 168s'' rather than the second inclined surface 168s of FIG. 7A.

Referring to FIG. 9A , the cover layer 160' may be formed so that the second connection portion 168' of the reinforcement portion 166 has an inclined structure including a concave surface 168s'. For example, the concave surface 168s' may be a curved surface formed concavely in a direction toward the surface 165s of the second base portion 165 (eg, +z-axis direction). The thickness of the second connection portion 168 gradually decreases, and the concave surface 168s' may be formed to connect the surface 167s of the edge portion 167 and the surface 165s of the second base portion 165. there is.

As shown in FIG. 9A, when the second connection portion 168 is formed in a shape including a concave surface 168s', the entire volume of the reinforcement portion 166 (e.g., the volume of the second connection portion 168) or size) is reduced, so the repulsion force and/or driving resistance can be further reduced.

Referring to FIG. 9B, the cover layer 160'' may be formed so that the second connection portion 168'' of the reinforcement portion 166 has an inclined structure including a convex surface 168s''. For example, the convex surface 168s'' may be a curved surface formed to be convex in the direction toward which the surface 165s of the second base portion 165 faces (eg, -z-axis direction). The thickness of the second connection portion 168'' gradually decreases, but the convex surface 168s'' connects the surface 167s of the edge portion 167 and the surface 165s of the second base portion 165. can be formed.

As shown in FIG. 9B, when the second connection portion 168'' is formed in a shape including a convex surface 168s'', the thickness change structure of the second connection portion 168'' is less visible to the naked eye. Visibility can be improved.

Figure 10 is an enlarged view showing a portion of the cover layer according to one embodiment. Figure 11a is a diagram showing a longitudinal cross-section of a cover layer according to one embodiment. Figure 11b is a diagram showing a cross-section in the width direction of a cover layer according to one embodiment.

10, 11A, and 11B show that in the cover layer 160 of the first embodiment previously described with reference to FIGS. 6, 7A, and 7B, the first base portion 163 of the first portion 161 is reinforced. This is a diagram showing the cover layer 180 of the second embodiment changed to be thicker than the sum of the thicknesses of the portion 166 and the second base portion 165.

Referring to FIGS. 10, 11A, and 11B, the cover layer 180 according to one embodiment may include a first part 181 and a second part 182. The first part 181 may include a first base part 183 and a first connection part 184, and the second part 182 may include a second base part 185 and a reinforcement part 186. You can. The reinforcement portion 186 may include an edge portion 187 and a second connection portion 188. For example, a first reinforcement part 186a and a second reinforcement part 186b are formed on both sides of the second base part 185 in the longitudinal direction (e.g., y-axis direction), and the first reinforcement part 186a ) and the second reinforcement portion 186b may each include an edge portion 187 and a second connection portion 188.

The description of the cover layer (e.g., the cover layer 160 in FIGS. 6, 7A, and 7B) according to the first embodiment may be equally applied to the cover layer 180 according to the second embodiment. Components included in the cover layer 180 according to the second embodiment are components included in the cover layer 160 according to the first embodiment (e.g., the first portion of FIGS. 6, 7A, and 7B ( It may be substantially the same as or similar to 161) and the second part 162). For example, the first base portion 183, the first connection portion 184, the second base portion 185, the reinforcement portion 186, and the edge portion 187 of the cover layer 180 according to the second embodiment. and the second connection portion 188 includes the first base portion 163, the first connection portion 164, and the second base portion 165 of the cover layer 160 shown in FIGS. 6, 7A, and 7B, respectively. It may be referred to as a reinforcement portion 166, an edge portion 167, and a second connection portion 168. Hereinafter, overlapping descriptions will be omitted and description will focus on the changed parts.

The cover layer 180 is formed so that the first base portion 183 of the first portion 181 is closer to the second base portion 185 (e.g., the surface 185s of the second base portion 185) than the reinforcement portion 186. It may be formed to protrude further from. For example, the first base portion 183 may be positioned higher than the edge portion 187 of the reinforcement portion 186 by a predetermined height H1 relative to the second base portion 185. In this way, as the height difference H1 occurs, one end of the reinforcement part 186 adjacent to the boundary between the first part 181 and the second part 182 is the first connection part of the first part 181 ( 184). In the cover layer 180 of the second embodiment, unlike the cover layer 160 of the first embodiment, the surface 187s of the edge portion 187 and the surface 183s of the first base portion 183 are connected in a stepped manner. You can.

The first base portion 183 of the first portion 181 may be formed to have a first thickness T1. The second base portion 185 of the second portion 182 may be formed to have a second thickness T2. The edge portion 187 of the reinforcement portion 186 may be formed to have a third thickness T3. The first connection portion 184 may connect the first base portion 183 and the second base portion 185 at an angle, and the second connection portion 188 may connect the edge portion 187 and the second base portion 185 at an angle. You can connect.

The first thickness T1 of the first base portion 183 may be greater than the sum of the second thickness T2 of the second base portion 185 and the third thickness T3 of the edge portion 187 (e.g. : T1 > T2+T3). For example, the surface 187s of the edge portion 187 may be located at the same height as the third thickness T3 based on the surface 185s of the second base portion 185, and the first base portion ( The surface 183s of 183) is at a height (H2 = T1-T2) corresponding to the difference between the first thickness T1 and the second thickness T2 based on the surface 185s of the second base portion 185. may be located, and the height H2 of the first base portion 183 may be greater than the height of the edge portion 187 (e.g., third thickness T3) (e.g., T1-T2 > T3). .

The cover layer 180 according to the second embodiment is a fixed part of the display 130 (e.g., the fixed part 132 in FIG. 3) by increasing the thickness of the first base part 183 of the first part 181. The strength of the first part 181 corresponding to can be improved. The first part 181 is a part included in the fixed part 132 of the display 130 that does not change shape when the electronic device 100 is driven, and operates the display 130 even when the thickness increases. Resistance may not increase.

FIG. 12 is a diagram illustrating a cover layer of a display according to an embodiment. Figure 13 is an enlarged view showing a portion of the cover layer according to one embodiment. FIG. 14A is a diagram illustrating a longitudinal cross-section of the second portion of the cover layer according to one embodiment. FIG. 14B is a diagram illustrating a cross-section in the width direction of the second portion of the cover layer according to one embodiment.

FIG. 13 is an enlarged view of portion F of the cover layer 190 shown in FIG. 12.

FIG. 14A is a cross-sectional view taken along line C-C' of the cover layer 190 shown in FIG. 12. FIG. 14B is a cross-sectional view taken along line D-D' of the cover layer 190 shown in FIG. 12. For example, FIG. 14B may be a cross-sectional view in the width direction of the second portion 192 in which the reinforcement portion 196 is formed.

FIGS. 12, 13, 14A, and 14B show cover layers (e.g., the cover layer 160 of FIGS. 6 and 7A and FIGS. 10 and 10 ) according to the first and second embodiments described with reference to the previous drawings. Unlike the cover layer 180 of FIG. 11A), one reinforcement part (e.g., the reinforcement part 166 of FIGS. 6 and 7A or the reinforcement part 186 of FIGS. 10 and 11A) is not connected continuously, This is a diagram showing the cover layer 190 according to the third embodiment in which a plurality of reinforcement parts 196 are formed spaced apart.

Referring to FIGS. 12, 13, 14A, and 14B, the cover layer 190 according to one embodiment may include a first part 191 and a second part 192. The first part 191 may include a first base part 193 and a first connection part 194, and the second part 192 may include a second base part 195 and a plurality of reinforcement parts 196. It can be included. For example, a first plurality of reinforcement parts 196a and a second plurality of reinforcement parts 196b may be formed on both sides of the second base part 195 in the longitudinal direction L (e.g., y-axis direction). The first plurality of reinforcement parts 196a and the second plurality of reinforcement parts 196b may be formed to have substantially the same shape.

The description of the structure and configuration of the cover layer 160 described above with reference to the preceding drawings may be equally applied to the cover layer 160 shown in FIGS. 12, 13, 14a, and 14b. For example, the first base portion 193, the first connection portion 194, the second base portion 195, the reinforcement portion 196, and the edge portion 197 of the cover layer 190 according to the third embodiment. And the second connection parts 198 and 199 are the first base part 163, the first connection part 164, and the second base part 165 of the cover layer 160 shown in FIGS. 6, 7A, and 7B, respectively. ), the reinforcement part 166, the edge part 167, and the second connection part 168. Hereinafter, overlapping descriptions will be omitted and description will focus on the changed parts.

The plurality of reinforcement parts 196 may protrude from the second base part 195 of the second part 192 at designated intervals along the width direction W (eg, x-axis direction). For example, the plurality of reinforcing parts 196 may be provided with protrusions arranged along the width direction (W) at an edge portion in the longitudinal direction (L) (e.g., y-axis direction) of the second base portion 195. You can. For example, based on FIG. 13, the plurality of reinforcement parts 196 include a first protrusion 1961, a second protrusion 1962 spaced apart from the first protrusion 1961 in the width direction (W), and a second protrusion 1962. It may include a third protrusion 1963 spaced apart from (1962) in the width direction (W).

According to various embodiments, the plurality of reinforcing portions 196 composed of protrusions disposed apart from each other may be understood as a cutout formed in the reinforcing portion extending integrally.

The cover layer 160 includes a plurality of reinforcement parts 196 spaced apart from each other, thereby reducing the overall volume of the reinforcement parts 196, thereby improving the strength of the edge portion of the display 130 and the repulsion force. and/or drive resistance may be reduced.

The plurality of reinforcement parts 196 each include an edge part 197 protruding from the second base part 195 with a specified thickness and a plurality of edge parts 197 obliquely extending from the edge part 197 toward the second base part 195. It may include 2 connection parts (198, 199). For example, the plurality of second connection parts 198 and 199 include a first sub-connection part 198 connecting the edge part 197 and the second base part 195 in the longitudinal direction (L), and a plurality of adjacent connection parts. It may include a second sub-connection portion 199 extending in the width direction (W) to be disposed between the reinforcement portions 196. The first sub-connection 198 and the second sub-connection 199 may be formed to have substantially the same inclination angle. However, this is an example, and according to various embodiments, the first sub-connection portion 198 and the second sub-connection portion 199 may be formed to have different inclination angles.

Figure 15 is a diagram showing a cross-section in the width direction of a display according to one embodiment.

FIG. 15 may be a cross-sectional view in the width direction (W) of the cover layer 160 shown in FIG. 14B, in which a reinforcement layer 150, a panel layer 140, and a protection layer 170 are additionally disposed at the bottom and top. there is.

Referring to FIG. 15, the display 130 according to one embodiment may be composed of a stacked structure of a plurality of layers, and the plurality of layers include a panel layer 140, a reinforcement layer 150, a cover layer 160, It may include a first protective layer 172 and a second protective layer 174. For example, the plurality of layers in FIG. 15 are each a plurality of layers in FIG. 4 (e.g., the panel layer 140, reinforcement layer 150, cover layer 160, and first protection layer 172 in FIG. 4). and second protective layer 174).

The reinforcement layer 150 is disposed between the cover layer 160 and the panel layer 140 and responds to changes in the thickness of the cover layer 160 to fill the space between the cover layer 160 and the panel layer 140. It can be formed into any shape. The reinforcement layer 150 may include a plurality of depressions 150r corresponding to the plurality of reinforcement parts 196 of the cover layer 160.

The plurality of reinforcement portions 196 may be spaced apart at a designated interval (G). The gap G between the plurality of reinforcement portions 196 may be determined by considering improvement in buckling resistance and filling of the reinforcement layer 150. For example, if the gap G between the plurality of reinforcement parts 196 is too narrow, the reinforcement layer 150 cannot sufficiently fill the space between the neighboring reinforcement parts 196, so bubbles may be generated, and accordingly, bubbles may be generated. may be visible on the display 130 or a peeling phenomenon may occur due to expansion of bubbles. Additionally, if the gap G between the plurality of reinforcement parts 196 is too wide, the effect on improving buckling resistance and improving the strength of the edge portion may be minimal.

FIG. 16A is a diagram illustrating an electronic device according to an embodiment. FIG. 16B is a diagram illustrating an electronic device according to an embodiment. FIG. 17 is a diagram showing a cover layer of a display included in the electronic device of FIGS. 16A and 16B.

FIGS. 16A and 16B show foldable electronic devices 200a and 200b. For example, FIG. 16A shows an in-folding type foldable electronic device 200a, and FIG. 16B shows an out-folding type foldable electronic device 200b.

The preceding drawings are diagrams illustrating various embodiments of a flexible display included in a slideable electronic device (e.g., the slideable electronic device 100 of FIGS. 1 and 2) and a cover layer included in the flexible display. Embodiments are described based on the slideable electronic device 100. However, the thickness change structure of the cover layer is not limited to the slideable electronic device 100 and can be applied to various types of electronic devices including flexible displays.

Below, with reference to FIGS. 16A, 16B, and 17, the cover layer 240 applied to the flexible display 230 of the foldable electronic devices 200a and 200b will be described.

Referring to FIGS. 16A and 16B , the foldable electronic device 200a and 200b according to an embodiment includes a first housing 210, a second housing 220 rotatably connected to the second housing 220, and It may include a display 230 that is disposed in the first housing 210 and the second housing 220 and is foldable. Although not shown, the first housing 210 and the second housing 220 may be rotatably connected by a hinge.

As shown in FIG. 16A, the in-folding type foldable electronic device 200a can be folded inward so that one side of the display 230 on which the screen is displayed partially faces. As shown in FIG. 16B, the out-folding type foldable electronic device 200a can be folded outward so that the side opposite to one side of the display 230 on which the screen is displayed partially faces.

The display 230 is disposed between a pair of fixing parts 231 and 232 and a pair of fixing parts 231 and 232 whose shape is not deformed during the folding and unfolding operations of the foldable electronic devices 200a and 200b. and may include a variable portion 233 whose shape is partially deformed during folding and unfolding operations of the foldable electronic devices 200a and 200b. For example, the display 230 includes a first fixing portion 231, at least a portion disposed in the first housing 210 and maintaining a substantially flat surface, and at least a portion disposed in the second housing 220 and substantially flat. It may include a second fixed part 232 that holds and a variable part 233 that is disposed between the first fixed part 231 and the second fixed part 232 and is deformed into a flat or curved surface. According to various embodiments, the first fixed part 231 may be referred to as a first planar part, the second fixed part 232 may be referred to as a second planar part, and the variable part 233 may be referred to as a folding part or a bending part.

The foldable electronic devices 200a and 200b may perform a folding/unfolding operation centered on the folding axis FA. The first housing 210 and the second housing 220 can be folded/unfolded around the folding axis FA. The folding axis (FA) may refer to the central axis of the folding/unfolding operation of the display 230. For example, the folding axis FA may overlap the folding portion 233 of the display 230 when the display 230 is viewed from above, and the display 230 may be folded about the folding axis FA. It can unfold.

According to various embodiments, the foldable electronic devices 200a and 200b may be transformed into a folded state in which the variable portion 233 is formed in a curved state and an unfolded state in which the variable portion 233 is formed in a flat surface. For example, when the foldable electronic devices 200a and 200b are in a folded state, the variable part 233 forms a curved surface with a predetermined curvature, and the first fixed part 231 and the second fixed part 232 have It can be arranged while forming a predetermined included angle. When the foldable electronic devices 200a and 200b are in the unfolded state, the variable part 233 forms substantially the same plane as the first fixed part 231 and the second fixed part 232, and the first fixed part 231 ) and the second fixing part 232 may be arranged side by side facing the same direction.

The display 230 of the foldable electronic devices 200a and 200b may have a structure substantially the same as the stacked structure of the display described with reference to FIG. 4 (e.g., the display 130 of FIG. 4). For example, the display 230 includes a panel layer (e.g., panel layer 140 in FIG. 4), a reinforcement layer (e.g., reinforcement layer 150 in FIG. 4), and a cover layer (e.g., cover layer (e.g., in FIG. 4) 160)) and a protection layer (e.g., the protection layer 170 in FIG. 4).

FIG. 17 is a plan view of one side of the cover layer 240 (eg, the first side 160a of the cover layer 160 in FIG. 4) facing the panel layer 140 as viewed from above.

Referring to FIG. 17, the cover layer 240 included in the display 230 of the foldable electronic device 200a and 200b is between a pair of first parts 241 and the pair of first parts 241. It may include a second part 242 that is disposed. During the folding and unfolding operations of the foldable electronic devices 200a and 200b, the pair of first parts 241 may be kept fixed without being deformed in shape, and the shape of the second part 242 may be deformed. It can be. For example, when the display 230 is folded or unfolded corresponding to the state of the foldable electronic devices 200a and 200b, the pair of first portions 241 may be maintained flat without being deformed, and the second portion 241 may be maintained flat without being deformed. Portion 242 may be deformed into a curved or flat surface.

The cover layer 240 of the foldable electronic devices 200a and 200b has a first direction facing from the first fixed part 231 to the second fixed part 232 of the display 230 and a variable part perpendicular to the first direction. (233) may be formed so that a thickness change occurs in the second direction in which it extends. For example, the first direction may be the width direction (W), and the second direction may be the longitudinal direction (L). For example, the second direction and the longitudinal direction (L) may be parallel to the folding axis (FA) of the display 230.

The pair of first parts 241 may correspond to the fixed parts 231 and 232 of the display 230, which have a fixed shape, and the second part 242 may correspond to the variable part of the display 230, which has a variable shape. It can correspond to (233). The first part 241 may include a first sub-part 241a corresponding to the first fixing part 231 and a second sub-part 241b corresponding to the second fixing part 232. The second part 242 may be disposed between the first sub-part 241a and the second sub-part 241b. For example, the first sub-portion 241a of the cover layer 240 is a part (or section) included in the first fixed part 231 of the display 230, and the second sub-portion of the cover layer 240 (241b) is a part (or section) included in the second fixed part 232 of the display 230, and the second part 242 of the cover layer 240 is included in the variable part 233 of the display 230. It may be an included part (or section).

The pair of first parts 241 may each include a first base part 243 and a first connection part 244 extending from the first base part 243 and connected to the second part 242. The first connection portion 244 connects the first base portion 243 and the second portion 242, and its thickness may gradually decrease toward the second portion 242. The first base portion 243 and the first connection portion 244 are the first base portion (e.g., FIG. 6) of the cover layer (e.g., the cover layer 160 in FIGS. 5 and 6) shown in FIGS. 5 and 6, respectively. may be referred to as the first base portion 163) and the first connection portion (eg, the first connection portion 164 of FIG. 6).

The second portion 242 may include a second base portion 245 and reinforcing portions 246 protruding from both edge portions of the second base portion 245 in the longitudinal direction. The reinforcement portion 246 includes an edge portion 247 forming an edge in the longitudinal direction (L) of the second portion 242 and a second portion extending from the edge portion 247 and connected to the surface of the second base portion 245. It may include a connection portion 248. The second connection portion 248 connects the edge portion 247 and the surface of the second base portion 245, and may gradually decrease in thickness from the edge portion 247 to the surface of the second base portion 245. there is. The second base portion 245, the edge portion 247, and the second connection portion 248 are the second base portion (e.g., the second base portion of the cover layer 240 shown in FIGS. 5 and 6, respectively). 2 may be referred to as a base portion 165), an edge portion (e.g., edge portion 167 of FIG. 6), and a second connection portion (e.g., second connection portion 168 of FIG. 6).

The cover layer 240 of the foldable electronic devices 200a and 200b changes in thickness in a direction perpendicular to the folding axis FA through the difference in thickness between the first part 241 and the second part 242. , It may be configured to cause a thickness change in the direction of the folding axis FA through the reinforcement portion 246 formed in the second portion 242.

The previous descriptions regarding various embodiments of the cover layer included in the slideable electronic device 100 may be equally applied to the cover layer 240 included in the foldable electronic device 200a and 200b.

Figure 18 is a flowchart illustrating a method of manufacturing a cover layer of a display according to an embodiment. FIG. 19 is a diagram showing some operations of the manufacturing method of FIG. 18. FIG. 20A is a diagram showing some operations of the manufacturing method of FIG. 18. FIG. 20B is a diagram showing some operations of the manufacturing method of FIG. 18.

FIG. 19 illustrates a masking operation 330 in the manufacturing method 300 of FIG. 18 . Figures 20A and 20B illustrate the etching operation 350 in the manufacturing method 300 of Figure 18.

Referring to FIG. 18, a method 300 of manufacturing a cover layer (e.g., the cover layer 160 of FIGS. 5, 6, 7A, and 7B) according to an embodiment includes the operation of processing a glass original plate ( 310), a masking operation (masking) 330, an etching operation (etching) 350, and a masking peeling and cleaning operation 370.

In the operation 310 of processing the glass original, the glass original is shaped into a desired shape corresponding to the width and length of the display (e.g., the display 130 in FIGS. 1 and 2 or the display 230 in FIGS. 16A and 16B). It can be processed. The processed glass disk can be formed to a uniform thickness.

In the masking operation 330, an acid-resistant and/or alkali-resistant coating solution may be used to mask a portion of the processed glass plate to be relatively thick. For example, a first portion of the cover layer 160 (e.g., first portion 161 in FIGS. 5, 6, 7a and 7b) and a reinforcement portion (e.g., first portion 161 in FIGS. 5, 6, 7a and 7b). Masking can be performed by applying a coating liquid to a portion corresponding to the reinforcement portion 166 in FIG. 7B.

Referring to FIG. 19 showing the masking operation 330, the first coating liquid 420 is applied to the area corresponding to the first portion 161 on the glass original plate 410, and the first coating liquid 420 is applied to the area corresponding to the reinforcement portion 166. The second coating liquid 430 can be applied. For example, the area where the coating liquid is not applied is the second base portion (e.g., the second portion 162 in FIGS. 5, 6, 7a, and 7b) of the second portion (e.g., in FIGS. 5, 6, It may be an area corresponding to the second base portion 165 of FIGS. 7A and 7B. The first coating solution 420 and the second coating solution 430 may have different chemical resistance. For example, by masking using the first coating liquid 420 and the second coating liquid 430 having different chemical resistances, the slope of the first portion 161 (e.g., the first slope 164s in FIG. 7B) and The slope of the reinforcement portion 166 (e.g., the second slope 168s in FIG. 7A) may be formed differently.

In the etching operation 350, the masked glass original may be immersed (soaking or dipping) in an etching solution. The thickness of the glass original plate may be uniformly reduced in areas other than those masked. According to the etching operation 350, the glass original plate may be processed into a form in which the masked portion and the unmasked portion have different thicknesses. The etching solution may be a variety of acidic or basic solutions. For example, the etching solution may use ammonium fluoride (NH4F), sulfuric acid (H2SO4), nitric acid (HNO3), silicic acid fluoride (HSiF6), sodium hydroxide (NaOH), or hydrofluoric acid (HF). The manufacturing method 300 may adjust the width and thickness of a relatively thick portion (eg, the first portion 161 or the reinforcement portion 166) of the cover layer 160 based on the masking area and etching time.

Referring to FIGS. 20A and 20B showing the etching operation 350, when the etching operation 350 is performed, the slope may be formed differently depending on the chemical resistance of the coating liquid. For example, the first coating solution 420 applied to the area corresponding to the first portion 161 may have weaker chemical resistance than the second coating solution 430 applied to the area corresponding to the reinforcement portion 166. there is. Since the first coating solution 420 and the second coating solution 430 have different chemical resistance, while the masked glass plate 410 is immersed in a specific etching solution for a certain period of time, the first coating solution 420 is applied to the second coating solution 430. More peeling may occur. Accordingly, the part of the glass disk from which the first coating solution 420 has been peeled off is corroded at a gentle slope (small slope) 411, and the part of the glass disk from which the second coating solution 430 has been peeled off is corroded at a steep slope (large slope). )(413). According to the etching operation shown in FIGS. 20A and 20B, the first inclined surface 164s of the first portion 161 is a cover layer (e.g., FIG. Cover layer 160 of FIGS. 7A and 7B) may be manufactured.

In the masking peeling and cleaning operation 370, the masking remaining after the etching operation 350 can be removed and the glass original plate can be cleaned.

Figure 21 is a block diagram of an electronic device in a network environment according to various embodiments.

The electronic device 501 of FIG. 21 may be referred to as the slideable electronic device 100 of FIGS. 1 and 2 or the foldable electronic device 200a and 200b of FIGS. 20A and 20B.

Referring to FIG. 21, in the network environment 500, the electronic device 501 communicates with the electronic device 502 through a first network 598 (e.g., a short-range wireless communication network) or a second network 599. It is possible to communicate with at least one of the electronic device 504 or the server 508 through (e.g., a long-distance wireless communication network). According to one embodiment, the electronic device 501 may communicate with the electronic device 504 through the server 508. According to one embodiment, the electronic device 501 includes a processor 520, a memory 530, an input module 550, an audio output module 555, a display module 560, an audio module 570, and a sensor module ( 576), interface 577, connection terminal 578, haptic module 579, camera module 580, power management module 588, battery 589, communication module 590, subscriber identification module 596 , or may include an antenna module 597. In some embodiments, at least one of these components (eg, the connection terminal 578) may be omitted, or one or more other components may be added to the electronic device 501. In some embodiments, some of these components (e.g., sensor module 576, camera module 580, or antenna module 597) are integrated into one component (e.g., display module 560). It can be.

The processor 520, for example, executes software (e.g., program 540) to operate at least one other component (e.g., hardware or software component) of the electronic device 501 connected to the processor 520. 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 520 stores instructions or data received from another component (e.g., sensor module 576 or communication module 590) in volatile memory 532. The commands or data stored in the volatile memory 532 can be processed, and the resulting data can be stored in the non-volatile memory 534. According to one embodiment, the processor 520 may include a main processor 521 (e.g., a central processing unit or an application processor) or an auxiliary processor 523 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 501 includes a main processor 521 and a auxiliary processor 523, the auxiliary processor 523 may be set to use lower power than the main processor 521 or be specialized for a designated function. You can. The auxiliary processor 523 may be implemented separately from the main processor 521 or as part of it.

The auxiliary processor 523 may, for example, act on behalf of the main processor 521 while the main processor 521 is in an inactive (e.g., sleep) state, or while the main processor 521 is in an active (e.g., application execution) state. ), together with the main processor 521, at least one of the components of the electronic device 501 (e.g., the display module 560, the sensor module 576, or the communication module 590) At least some of the functions or states related to can be controlled. According to one embodiment, co-processor 523 (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module 580 or communication module 590). there is. According to one embodiment, the auxiliary processor 523 (e.g., 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 501 itself on which the artificial intelligence model is performed, or may be performed through a separate server (e.g., server 508). 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 530 may store various data used by at least one component (eg, the processor 520 or the sensor module 576) of the electronic device 501. Data may include, for example, input data or output data for software (e.g., program 540) and instructions related thereto. Memory 530 may include volatile memory 532 or non-volatile memory 534.

The program 540 may be stored as software in the memory 530 and may include, for example, an operating system 542, middleware 544, or application 546.

The input module 550 may receive commands or data to be used in a component of the electronic device 501 (e.g., the processor 520) from outside the electronic device 501 (e.g., a user). The input module 550 may include, for example, a microphone, mouse, keyboard, keys (eg, buttons), or digital pen (eg, stylus pen).

The sound output module 555 may output sound signals to the outside of the electronic device 501. The sound output module 555 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 560 can visually provide information to the outside of the electronic device 501 (eg, a user). The display module 560 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 560 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 570 can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module 570 acquires sound through the input module 550, the sound output module 555, or an external electronic device (e.g., directly or wirelessly connected to the electronic device 501). Sound may be output through an electronic device 502 (e.g., speaker or headphone).

The sensor module 576 detects the operating state (e.g., power or temperature) of the electronic device 501 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 576 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 577 may support one or more designated protocols that can be used to connect the electronic device 501 directly or wirelessly with an external electronic device (eg, the electronic device 502). According to one embodiment, the interface 577 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 578 may include a connector through which the electronic device 501 can be physically connected to an external electronic device (eg, the electronic device 502). According to one embodiment, the connection terminal 578 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 579 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 579 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 580 can capture still images and moving images. According to one embodiment, the camera module 580 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 588 can manage power supplied to the electronic device 501. According to one embodiment, the power management module 588 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).

The battery 589 may supply power to at least one component of the electronic device 501. According to one embodiment, the battery 589 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

Communication module 590 provides a direct (e.g., wired) communication channel or wireless communication channel between electronic device 501 and an external electronic device (e.g., electronic device 502, electronic device 504, or server 508). It can support establishment and communication through established communication channels. Communication module 590 operates independently of processor 520 (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 590 is a wireless communication module 592 (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 594 (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 598 (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 599 (e.g., legacy It may communicate with an external electronic device 504 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 592 uses subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 596 within a communication network such as the first network 598 or the second network 599. The electronic device 501 can be confirmed or authenticated.

The wireless communication module 592 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 592 may support high frequency bands (e.g., mmWave bands), for example, to achieve high data rates. The wireless communication module 592 uses various technologies to secure performance in high frequency bands, for example, beamforming, massive MIMO (multiple-input and multiple-output), 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 592 may support various requirements specified in the electronic device 501, an external electronic device (e.g., electronic device 504), or a network system (e.g., second network 599). According to one embodiment, the wireless communication module 592 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 597 may transmit or receive signals or power to or from the outside (e.g., an external electronic device). According to one embodiment, the antenna module 597 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 597 may include a plurality of antennas (eg, array antennas). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 598 or the second network 599 is, for example, connected to the plurality of antennas by the communication module 590. can be selected Signals or power may be transmitted or received between the communication module 590 and an external electronic device through the selected at least one 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 597.

According to various embodiments, the antenna module 597 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 501 and the external electronic device 504 through the server 508 connected to the second network 599. Each of the external electronic devices 502 or 504 may be of the same or different type as the electronic device 501. According to one embodiment, all or part of the operations performed in the electronic device 501 may be executed in one or more of the external electronic devices 502, 504, or 508. For example, when the electronic device 501 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 501 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 501. The electronic device 501 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 501 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In one embodiment, the external electronic device 504 may include an Internet of Things (IoT) device. Server 508 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 504 or server 508 may be included in the second network 599. The electronic device 501 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.

The flexible display 130 according to an embodiment disclosed in this document includes a panel layer 140; and a cover layer 160 disposed on one side of the panel layer. The cover layer includes a first part 161 and a second part 162 extending from the first part in a first direction, and the first part is formed with a first thickness T1. It includes a base portion 163 and a first connection portion 164 extending from the first base portion and gradually decreasing in thickness, wherein the second portion is connected to the first connection portion and is smaller than the first thickness. It may include a second base portion 165 formed to have a thickness of 2 (T2) and a reinforcement portion 166 protruding from an edge of the second base portion facing a second direction perpendicular to the first direction. The reinforcement portion includes an edge portion 167 protruding from a portion of the second base portion to have a third thickness T3, and a second connection portion extending from the edge portion toward the second base portion and gradually decreasing in thickness. 168) may be included.

In one embodiment, the first connection part includes a first inclined surface (164s) that obliquely connects the surface (163s) of the first base part and the surface (165s) of the second base part, and the second connection part includes, It may include a second inclined surface 168s that obliquely connects the surface 167s of the edge portion with the surface of the second base portion.

In one embodiment, the first inclined surface may be formed to have a first inclined angle A1, and the second inclined surface may be formed to have a second inclined angle A2 that is different from the first inclined angle.

In one embodiment, the first tilt angle may be smaller than the second tilt angle.

In one embodiment, the first thickness of the first base portion may be substantially equal to the sum of the second thickness of the second base portion and the third thickness of the edge portion.

In one embodiment, the reinforcing part may be connected to the first part so that the edge part forms the same plane as the first base part.

In one embodiment, the first thickness of the first base portion 183 may be greater than the sum of the second thickness of the second base portion 185 and the third thickness of the edge portion 187. there is.

In one embodiment, the first base portion may protrude more than the edge portion by a first height H1 based on the second base portion, and the first height varies from the first thickness to the second thickness and the second thickness. 3 It may be equal to the value minus the sum of the thicknesses.

In one embodiment, it may further include a reinforcing layer 150 disposed between the panel layer and the cover layer, and the reinforcing layer may be formed in a shape corresponding to a change in thickness of the cover layer.

In one embodiment, the reinforcement portion 196 may be formed with a plurality of protrusions 1961, 1962, and 1093 spaced apart at designated intervals along the first direction.

In one embodiment, it may further include a reinforcing layer 150 disposed between the panel layer and the cover layer, wherein the reinforcing layer may include a plurality of depressions 150r corresponding to the plurality of protrusions. there is.

In one embodiment, the first part may be configured to remain substantially flat, and the second part may be configured to be partially deformed into a curved or flat surface.

A slideable electronic device 100 according to an embodiment disclosed in this document includes a first structure 110; a second structure 120 slidably connected to the first structure; and a display 130 configured to change the size of an area exposed to the front of the electronic device in response to sliding of the second structure relative to the first structure, and formed in a stacked structure of a plurality of layers. You can. The plurality of layers include a panel layer 140 and a cover layer 160 disposed on one side of the panel layer, and the cover layer includes a first part 161 and a first direction from the first part. It may include an extending second portion 162. The first part includes a first base portion 163 formed to have a first thickness T1 and a first connection portion 164 extending from the first base portion and having a gradually decreasing thickness, and the second The portion includes a second base portion 165 connected to the first connection portion and formed with a second thickness T2 smaller than the first thickness, and a second base portion 165 facing in a second direction perpendicular to the first direction. It may include a reinforcement portion 166 protruding from the edge. The reinforcement portion includes an edge portion 167 protruding from a portion of the second base portion to have a third thickness T3, and a second connection portion extending from the edge portion toward the second base portion and gradually decreasing in thickness. 168) may be included.

In one embodiment, the first connection part includes a first inclined surface (164s) that obliquely connects the surface (163s) of the first base part and the surface (165s) of the second base part, and the second connection part includes, It may include a second inclined surface 168s that obliquely connects the surface 167s of the edge portion with the surface of the second base portion.

In one embodiment, the first inclined surface may be formed to have a first inclined angle A1, and the second inclined surface may be formed to have a second inclined angle A2 that is different from the first inclined angle.

In one embodiment, the display includes a fixed part 132 whose shape is fixedly maintained when the second structure slides, and a fixed part 132 that extends from the fixed part and is transformed into a flat or curved surface in response to the sliding of the second structure. It may include a variable part (eg, a rollable part or a rolling part) 134, wherein the first part may be included in the fixed part of the display, and the second part may be included in the variable part of the display.

In one embodiment, the first direction may be substantially parallel to the sliding directions S1 and S2 of the second structure with respect to the first structure.

A foldable electronic device (200a; 200b) according to an embodiment disclosed in this document includes a first housing 210; a second housing 220 rotatably connected to the first housing; and a display 230 disposed on the first housing and the second housing, configured to be partially folded or unfolded in response to relative rotation of the first housing and the second housing, and formed in a stacked structure of a plurality of layers. ); may be included. The plurality of layers include a panel layer 140 and a cover layer 160; 240 disposed on one side of the panel layer, and the cover layer includes a first part 161; 241 and a It may include a second portion (162; 242) extending in the first direction. The first part includes a first base portion (163; 243) formed to have a first thickness (T1) and a first connection portion (164; 244) extending from the first base portion and having a gradually decreasing thickness. , the second part includes a second base portion (165; 245) connected to the first connection portion and formed with a second thickness (T2) smaller than the first thickness and a second direction perpendicular to the first direction. It may include a reinforcement portion (166; 246) protruding from an edge of the second base portion facing towards the second base portion. The reinforcement portion includes an edge portion (167; 247) protruding from a portion of the second base portion to have a third thickness (T3) and a second portion extending from the edge portion toward the second base portion and gradually decreasing in thickness. It may include a connection portion (168; 248).

In one embodiment, the first connection part includes a first inclined surface (164s) that obliquely connects the surface (163s) of the first base part and the surface (165s) of the second base part, and the second connection part includes, It may include a second inclined surface 168s that obliquely connects the surface 167s of the edge portion with the surface of the second base portion.

In one embodiment, the first inclined surface may be formed to have a first inclined angle A1, and the second inclined surface may be formed to have a second inclined angle A2 that is different from the first inclined angle.

In one embodiment, the display includes a first fixing part 231, at least a part of which is disposed on the first housing and is formed in a plane, and a second fixing part 231, at least a part of which is disposed in the second housing and is formed in a plane ( 232) and a variable part (e.g., a foldable part or a folding part) 233 disposed between the first fixed part and the second fixed part, wherein the first part is the first fixed part of the display. portion and the second fixed portion, and the second portion may be included in the variable portion of the display.

In one embodiment, the first part includes a first sub-part 241a corresponding to the first fixed part and a second sub-part 241b corresponding to the second fixed part, and the second part It may be disposed between the first sub-portion and the second sub-portion.

In one embodiment, the first direction may be substantially perpendicular to the folding axis FA of the display, and the second direction may be substantially parallel to the folding axis FA of the display.

In one embodiment, the first direction may be substantially parallel to a direction in which the first fixed part and the second fixed part extend from both sides of the variable part.

Electronic devices according to various embodiments disclosed in this document may be of various types. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of this document are not limited to the above-mentioned devices.

The various embodiments of this document and the terms used herein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various changes, equivalents, or replacements of the embodiments. In connection with the description of the drawings, similar reference numbers may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise. As used herein, “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 “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one component from another, and to refer to that component in other respects (e.g., importance or order) is not limited. One (e.g., first) component is said to be “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicatively.” When mentioned, it means that any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.

The term “module” used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as logic, logic block, component, or circuit, for example. can be used A module may be an integrated part or a minimum unit of the parts or a part thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document are one or more instructions stored in a storage medium (e.g., built-in memory 536 or external memory 538) that can be read by a machine (e.g., electronic device 501). It may be implemented as software (e.g., program 540) including these. For example, a processor (e.g., processor 520) of a device (e.g., electronic device 501) may call at least one command among one or more commands stored from a storage medium and execute it. This allows the device to be operated to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. A storage medium that can be read by a device may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain signals (e.g. electromagnetic waves), and this term refers to cases where data is semi-permanently stored in the storage medium. There is no distinction between temporary storage cases.

According to one embodiment, methods according to various embodiments disclosed in this document may be included and provided in a computer program product. Computer program products are commodities and can be traded between sellers and buyers. The computer program product may be distributed in the form of a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or through an application store (e.g. Play Store™) or on two user devices (e.g. It can be distributed (e.g. downloaded or uploaded) directly between smart phones) or online. In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

According to various embodiments, each component (e.g., module or program) of the above-described components may include a single or plural entity, and some of the plurality of entities may be separately placed in other components. . According to various embodiments, one or more of the components or operations described above may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each component of the plurality of components in the same or similar manner as those performed by the corresponding component of the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or , or one or more other operations may be added.

Claims (20)

In flexible displays,
panel layer; And a cover layer disposed on one side of the panel layer,
The cover layer includes a first part and a second part extending from the first part in a first direction,
The first part is,
It includes a first base portion formed of a first thickness and a first connection portion extending from the first base portion and having a gradually decreasing thickness,
The second part is,
A second base portion connected to the first connection portion and formed with a second thickness smaller than the first thickness, and a reinforcing portion protruding from an edge of the second base portion facing a second direction perpendicular to the first direction; ,
The reinforcement part,
A flexible display comprising an edge portion protruding from a portion of the second base portion to have a third thickness, and a second connection portion extending from the edge portion toward the second base portion and having a thickness that gradually decreases. In claim 1,
The first connection portion includes a first inclined surface that obliquely connects the surface of the first base portion and the surface of the second base portion,
The second connection portion includes a second inclined surface that obliquely connects the surface of the edge portion and the surface of the second base portion. In claim 2,
The first inclined surface is formed to have a first inclined angle,
The flexible display, wherein the second inclined surface is formed to have a second inclined angle different from the first inclined angle. In claim 3,
A flexible display, wherein the first tilt angle is smaller than the second tilt angle. In claim 1,
The first thickness of the first base portion is substantially equal to the sum of the second thickness of the second base portion and the third thickness of the edge portion. In claim 5,
A flexible display, wherein the reinforcing part is connected to the first part so that the edge part forms the same plane as the first base part. In claim 1,
The flexible display wherein the first thickness of the first base portion is greater than the sum of the second thickness of the second base portion and the third thickness of the edge portion. In claim 7,
The first base portion protrudes further than the edge portion by a first height relative to the second base portion,
The first height is equal to a value obtained by subtracting the sum of the second thickness and the third thickness from the first thickness. In claim 1,
It further includes a reinforcement layer disposed between the panel layer and the cover layer,
A flexible display, wherein the reinforcement layer is formed into a shape corresponding to a change in thickness of the cover layer. In claim 1,
The reinforcement part,
A flexible display in which a plurality of protrusions are formed to be spaced apart at designated intervals along the first direction. In claim 10,
It further includes a reinforcement layer disposed between the panel layer and the cover layer,
The reinforcement layer includes a plurality of depressions corresponding to the plurality of protrusions. In claim 1,
the first portion is configured to remain substantially flat,
A flexible display, wherein the second part is configured to be partially deformed into a curved surface or a flat surface. In a slideable electronic device,
first structure;
a second structure slidably connected to the first structure; and
A display configured to change the size of an area exposed to the front of the electronic device in response to sliding of the second structure relative to the first structure, and formed in a stacked structure of a plurality of layers,
The plurality of layers include a panel layer and a cover layer disposed on one side of the panel layer,
The cover layer includes a first part and a second part extending from the first part in a first direction,
The first part is,
It includes a first base portion formed of a first thickness and a first connection portion extending from the first base portion and having a gradually decreasing thickness,
The second part is,
A second base portion connected to the first connection portion and formed with a second thickness smaller than the first thickness, and a reinforcing portion protruding from an edge of the second base portion facing a second direction perpendicular to the first direction; ,
The reinforcement part,
A slideable electronic device including an edge portion protruding from a portion of the second base portion to have a third thickness, and a second connection portion extending from the edge portion toward the second base portion and having a thickness that gradually decreases. In claim 13,
The first connection portion includes a first inclined surface that obliquely connects the surface of the first base portion and the surface of the second base portion,
The second connection portion includes a second inclined surface that obliquely connects the surface of the edge portion and the surface of the second base portion. In claim 14,
The first inclined surface is formed to have a first inclined angle,
The second inclined surface is formed to have a second inclination angle that is different from the first inclination angle. In claim 13,
The display is,
It includes a fixed part whose shape is fixedly maintained when the second structure slides, and a variable part that extends from the fixed part and is transformed into a flat or curved surface in response to the sliding of the second structure,
the first portion is included in the fixed portion of the display,
The second portion is included in the variable portion of the display. In a foldable electronic device,
first housing;
a second housing rotatably connected to the first housing; and
A display disposed on the first housing and the second housing, configured to be partially folded or unfolded in response to relative rotation of the first housing and the second housing, and formed in a stacked structure of a plurality of layers. do,
The plurality of layers include a panel layer and a cover layer disposed on one side of the panel layer,
The cover layer includes a first part and a second part extending from the first part in a first direction,
The first part is,
It includes a first base portion formed of a first thickness and a first connection portion extending from the first base portion and having a gradually decreasing thickness,
The second part is:
A second base portion connected to the first connection portion and formed with a second thickness smaller than the first thickness, and a reinforcing portion protruding from an edge of the second base portion facing a second direction perpendicular to the first direction; ,
The reinforcement part,
A foldable electronic device including an edge portion protruding from a portion of the second base portion to have a third thickness, and a second connection portion extending from the edge portion toward the second base portion and having a thickness that gradually decreases. In claim 17,
The first connection portion includes a first inclined surface that obliquely connects the surface of the first base portion and the surface of the second base portion,
The second connection portion includes a second inclined surface that obliquely connects the surface of the edge portion and the surface of the second base portion. In claim 18,
The first inclined surface is formed to have a first inclined angle,
The second inclined surface is formed to have a second inclination angle that is different from the first inclination angle. In claim 17,
The display is,
A first fixing part at least partially disposed on the first housing and formed in a plane, a second fixing part at least in part disposed in the second housing and formed in a plane, and the first fixing part and the second fixing part Includes a variable part disposed between,
The first part is included in the first fixed part and the second fixed part of the display,
The second portion is included in the variable portion of the display.

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