ELECTRONIC DEVICE INCLUDING FOLDABLE DISPLAY

According to certain embodiments, a foldable electronic device comprises: a flexible display disposed on a front surface of the foldable electronic device; a housing forming an exterior of the foldable electronic device and foldable around a folding axis, the housing comprising a bezel formed along an edge of the flexible display; a window stacked on the flexible display; and an adhesive layer bonding the window to another element, the adhesive layer comprising: a first area comprising a first adhesive; and a second area which is formed along an edge of the first area, and has an area which corresponds to the bezel, the second area comprising a second adhesive; wherein a strength of the second adhesive can be weakened in a different manner than the strength of the first adhesive.

BACKGROUND

Technical Field

Certain embodiments disclosed herein relate to an electronic device including a foldable display.

Description of Related Art

Foldable displays allow the user to enjoy a large screen, without reducing the portability of the electronic device. The user can enjoy the larger screen by unfolding the electronic device. When the user is carrying the electronic device, the user can fold the electronic device, thereby reducing the dimensions of the electronic device.

However, displays forming the exterior of electronic devices and thus can be damaged by external impacts. Therefore, an electronic device including a display typically includes a single window or multiple windows, thereby protecting the display.

An electronic device may further include a window for protecting a display module. The window may be securely attached to another element of the display device. Even if the window is solely damaged, the entire module constituting the display may need to be replaced because the window is impractical to detach from the other element of the display device. This increases the replacement cost, while wasting an otherwise operable display.

This can become even more pronounced with foldable displays because the window may be thinner, and thus more susceptible to cracking.

Using a weaker adhesive may result in multiple windows detaching from the display due to wear.

SUMMARY

According to certain embodiments, a foldable electronic device comprises: a flexible display disposed on a front surface of the foldable electronic device; a housing forming an exterior of the foldable electronic device and foldable around a folding axis, the housing comprising a bezel formed along an edge of the flexible display; a window stacked on the flexible display; and an adhesive layer bonding the window to another element, the adhesive layer comprising: a first area comprising a first adhesive; and a second area which is formed along an edge of the first area, and has an area which corresponds to the bezel, the second area comprising a second adhesive; wherein a strength of the second adhesive can be weakened in a different manner than the strength of the first adhesive.

According to certain embodiments, a foldable electronic device comprises: a flexible display disposed on a front surface of the foldable electronic device; a housing configured to form an exterior of the foldable electronic device and be foldable around an axis, the housing comprising a bezel formed along an edge of the flexible display; a first window bonded to the flexible display; and a second window bonded on the first window having one side exposed to an outside of the foldable electronic device; and an adhesive layer disposed between the flexible display and the first window bonding the flexible display and the first window, wherein the adhesive layer comprises: a first area comprising a first adhesive; and a second area formed along an edge of the first area, having an area corresponding to the bezel, the second area comprising a second adhesive; wherein an adhesive strength of the second adhesive can be weakened in a different way from the first adhesive.

According to certain embodiments, a foldable electronic device comprises: a flexible display disposed on a front surface of the foldable electronic device; a housing forming an exterior of the foldable electronic device and foldable around a folding axis, the housing comprising a bezel formed along an edge of the flexible display; a window stacked on the flexible display; and an adhesive layer bonding the window and another element of the flexible display, wherein the adhesive layer comprises: a first area, which is exposed to an outside comprising a first adhesive; and a second area covered by the bezel and formed along an edge of the first area, comprising a second adhesive; wherein an adhesive strength of the second adhesive can be weakened in a different way from the first adhesive.

In connection with the description of the drawings, same or similar reference numerals will be used to refer to same or similar elements.

DETAILED DESCRIPTION

Hereinafter, certain embodiments of the disclosure will be described with reference to the accompanying drawings. However, the descriptions are not intended to limit the disclosure to specific embodiments, and should be understood to include various modifications, equivalents, and/or alternatives of the embodiments of the disclosure.

According to certain embodiments disclosed herein, an electronic device may provide an easily replaceable window. For example, the electronic device may provide windows such that only the broken window can be selectively replaced.

According to certain embodiments disclosed herein, the lifespan of a component of an electronic device may be increased, and the quality of the electronic device may be improved.

In addition, according to certain embodiments, an electronic device may be provided wherein the separation between a window and a display due to wear can be avoided.

Various other advantageous effects identified explicitly or implicitly through the disclosure may be provided.

FIGS.1and2describe a foldable electronic device. The window in a foldable electronic device is susceptible to cracking or breaking because it is thinner in certain areas to allow for folding.

Foldable Electronic Device

An electronic device that is foldable provides the benefits of a large screen without detracting from portability. When the user is stationary and using the electronic device, the user places the electronic device in the unfolded state as shown inFIG.1. In the unfolded state, the display has L1×W1dimensions. However, when carrying the electronic device, the user can fold the electronic device as shown inFIG.2, thereby reducing the W1dimension in half

FIG.1illustrates an unfolded state of an electronic device according to an embodiment.FIG.2illustrates a folded state of an electronic device according to an embodiment.

Referring toFIG.1andFIG.2together, in an embodiment, an electronic device110may include a foldable housing100(hereafter, shortly referred to as a “housing”100) and a flexible or a foldable display160(hereinafter, shortly referred to as a “display”160) disposed in a space formed by the housing100. In the disclosure, a surface, on which the display160is disposed, may be defined as a first surface or the front surface of the electronic device110. In addition, a surface opposite to the front surface may be defined as a second surface or the rear surface of the electronic device110. In addition, a surface, which is configured to surround the space between the front surface and the rear surface, may be defined as a third surface or a side surface of the electronic device110.

The housing100may have a substantially rectangular shape in the unfolded state ofFIG.1. For example, the housing100may have a designated width W1and a designated length L1longer than the designated width W1. For another example, the housing100may have a designated width W1and a designated length L1which is substantially the same as or shorter than the designated width W1. For example, the designated width W1may be the width of the display160. In an embodiment, the housing100of the electronic device110may be folded or unfolded with reference to a folding axis A which is substantially parallel to the long edge (e.g., the edge, which faces the y-axis direction, among the edges of the housing100of the electronic device110ofFIG.1) of the rectangular shape.

The housing100may include a first housing101, a second housing102, and a connection part103. The connection part103may be disposed between the first housing101and the second housing102. The connection part103may be coupled to the first housing101and the second housing102, and the first housing101and/or the second housing102may rotate about the connection part103(or the folding axis A).

The first housing101may include a first side member1011and a first rear cover1013. In an embodiment, the second housing102may include a second side member1021and a second rear cover1023.

The first side member1011may be configured to extend along an edge of the first housing101, and to form at least a portion of the side surface of the electronic device110. The first side member1011may include at least one conductive portion formed of a conductive material (e.g., metal). The conductive portion may be configured to operate as an antenna radiator for transmitting and/or receiving RF signals. Similarly to the first side member1011, the second side member1021may be configured to form a portion of the side surface of the electronic device110, and at least a portion of the second side member1021may be formed of a conductive material to operate as an antenna radiator.

The first side member1011and the second side member1021are arranged at both sides with reference to the folding axis A, and may have a substantially symmetrical shape with respect to the folding axis A.

The angle formed by or the distance between the first side member1011and the second side member1021may be changed according to whether the state of the electronic device110is an unfolded state, a folded state, or an intermediate state.

The housing100may be configured to form a recess for accommodating the display160. The recess may have a shape corresponding to that of the display160. According to an embodiment, the recess may be emitted therefrom.

A sensor area134may be formed to be adjacent to a corner of the second housing102and may have a predetermined area. However, the arrangement, shape, and size of the sensor area134may not be limited to the illustrated embodiment. For example, in another embodiment, the sensor area134may be provided in another corner of the housing100or any area between the top corner and the bottom corner thereof. For another example, the sensor area134may also be omitted therefrom. For example, components arranged in the sensor area134may be arranged below the display160, or may be arranged at other positions in the housing100. In an embodiment, components, which are embedded in the electronic device110and configured to perform various functions, may be exposed on the front surface of the electronic device110, through the sensor area134or through one or more openings provided in the sensor area134. In certain embodiments, the components may include various kinds of sensors. For an example, the sensors may include at least one of a front camera, a receiver, or a proximity sensor.

The first rear cover1013may be disposed in the first housing101on the rear surface of the electronic device110. The first rear cover1013may have a rim substantially rectangular shape. Similarly to the first rear cover1013, the second rear cover1023may be disposed in the second housing102on the rear surface of the electronic device110.

The first rear cover1013and the second rear cover1023may have a substantially symmetrical shape around the folding axis A. However, the first rear cover1013and the second rear cover023may not necessarily have a mutually symmetrical shape, and in another embodiment, the electronic device110may include the first rear cover1013and/or the second rear cover1023which have various shapes. In addition, in another embodiment, the first rear cover1013may be integrally formed with the first side member1011, and the second rear cover1023may be integrally formed with the second side member1021.

The first rear cover1013, the second rear cover1023, the first side member1011, and the second side member1021may be configured to form a space which allows various components (e.g., a printed circuit board or a battery) of the electronic device110to be arranged therein.

One or more components may be arranged or may be visually exposed on the rear surface of the electronic device110. For example, at least a part of a sub-display165may be visually exposed through at least an area of the first rear cover1013. For example, the sub-display165may be visually exposed through the entire area of the first rear cover1013, but the area, which allows the sub-display165to be exposed therethrough, may not be limited to the above-described embodiment. For another example, the rear camera180may be visually exposed through at least an area of the second rear cover1023. For another example, a rear camera180may be disposed in an area of the rear surface of the electronic device110.

The housing100of the electronic device110may not be limited to the shape and the combination illustrated inFIGS.1and2, and may be implemented by other shapes or a combination and/or coupling of components.

Referring toFIG.2, the connection part103may be implemented such that the first housing101and the second housing102are mutually rotatable. For example, the connection part103may include a hinge structure coupled to the first housing101and the second housing102. In an embodiment, the connection part103may include a hinge cover130disposed between the first side member1011and the second side member1021to cover inner components (for example, the hinge structure) thereof. In an embodiment, the hinge cover130may be covered by a part of the first side member1011and the second side member1021or may be exposed to the outside, according to a state of (an unfolded state (flat state) or a folded state) of the electronic device110. For example, the hinge cover130may be configured to allow the size of the area exposed to the outside to be changed according to a state (an unfolded state (flat state) or a folded state) of the electronic device110.

As an example, as illustrated inFIG.1, when the electronic device110is in an unfolded state, at least a part of the hinge cover130may be covered by the first side member1011and the second side member1021so as not to be exposed. As an example, as illustrated inFIG.2, when the electronic device110is in an unfolded state, at least a part of the hinge cover130may be exposed to the outside, between the first side member1011and the second side member1021.

As an example, when the first side member1011and the second side member1021are in an intermediate state in which the first side member and the second side member are folded with a certain angle, a part of the hinge cover130may be partially exposed to the outside, between the first side member1011and the second side member1021. However, in the case, the exposed area of the hinge cover130may be smaller than that of the fully folded state ofFIG.2.

The display160may be disposed in the space formed by the housing100. For example, the display160may be configured to form most of the front surface of the electronic device110. For example, the front surface of the electronic device110may include the display160, and a partial area of the first side member1011and a partial area of the second side member1021, which are adjacent to the display160. For another example, the rear surface of the electronic device110may include the first rear cover1013, a partial area of the first side member1011, which is adjacent to the first rear cover1013, the second rear cover1023, and a partial area of the second side member1021, which is adjacent to the second rear cover1023.

The display160may include a flexible display, of which at least a partial area can be transformed into a flat-surface or a curved-surface. In an embodiment, the display160may include a folding area163, a first area161, and a second area162. The folding area163may be configured to extend along the folding axis A, and with reference to the folding area163, the first area161may be disposed at one side (e.g., the left side of the folding area163illustrated inFIG.1) and the second area162may be disposed at the other side (e.g., the right side of the folding area163illustrated inFIG.1). For another example, the first area161may be an area disposed in the first housing101, and the second area162may be an area disposed in the second housing102. The folding area163may be an area disposed on the connection part103.

The division of the area of the display160illustrated inFIG.1andFIG.2may be exemplary, and the area of the display160may be divided into multiple (e.g., four or more, or two) areas according to a structure or a function thereof. As an example, in the embodiment illustrated inFIG.1, the areas of the display160may be divided by the folding area163or the folding axis A, but in another embodiment, the areas of the display160may be divided with reference to another folding area or another folding axis.

In an embodiment, the first area161and the second area162may have an overall symmetrical shape around the folding area163. However, differently from the first area161, the second area162may include a notch which is cut according to the presence of the sensor area134, but in an area other than the sensor area, may have a symmetrical shape with the first area161. For example, the first area161and the second area162may include portions having shape symmetric to each other and portions having shapes asymmetric to each other. For example, the notch of the second area162may be omitted therefrom.

Hereinafter, the operations of the first side member1011and the second side member1021and each area of the display160will be described according to a state (e.g., an unfolded state and a folded state) of the electronic device110.

In an embodiment, when the electronic device110is in an unfolded state (e.g.,FIG.1), the first side member1011and the second side member1021may be arranged to face substantially the same direction while forming an angle of about 180 degrees. The surface of the first area161and the surface of the second area162of the display160may form 180 degrees to each other, and may face substantially the same direction (e.g., the front direction of the electronic device). For example, the folding area163may be configured to form the same flat-surface as the first area161and the second area162.

In an embodiment, when the electronic device110is in a folded state (e.g.,FIG.2), the first side member1011and the second side member1021may be arranged to face each other. The surface of the first area161and the surface of the second area162of the display160may form a narrow angle (e.g., an angle between 0 degrees and 10 degrees) and thus may face each other. At least a part of the folding area163may be formed as a curved-surface having a predetermined curvature.

In an embodiment, when the electronic device110is in an intermediate state, the first side member1011and the second side member1021may be arranged at a certain angle to each other. The surface of the first area161and the surface of the second area162of the display160may form an angle larger than that the folded state and smaller than that of the unfolded state. At least a part of the folding area163may be formed as a curved-surface having a predetermined curvature, and the curvature, at this time, may be smaller than that of the folded state. The various electronic devices110disclosed in the disclosure may be an electronic device having an expandable display, and may include a sliding type rollable electronic device in which at least a portion of a display disposed in a housing can move in an unfolded state or a rolling type rollable electronic device in which at least a portion of a display disposed in a housing can be rolled by a roller.

However, displays forming the exterior of electronic devices and thus can be damaged by external impacts. Therefore, an electronic device including a display typically includes a single window or multiple windows, thereby protecting the display.

The window may be securely attached to another element of the display device. However, if the window is solely damaged, it is desirable to only remove and replace the window. Certain embodiments presented below may provide the foregoing benefits, as well as others.

FIG.3is a view showing a stacked structure of a display of an electronic device according to an embodiment.

A foldable electronic device301ofFIG.3may be configured to correspond to the electronic device110ofFIG.1andFIG.2described above. For an example, the electronic device301may include a part or the whole of components constituting the electronic device110FIG.1andFIG.2.

The foldable electronic device301may include a housing (e.g., the housing100ofFIG.1), a flexible display310, a window320, an adhesive layer330, that includes a first area331and a second area332, and a protective layer340. In certain embodiments, the window320can be thin, such as having a thickness of less than 0.5 um.

The housing ofFIG.3may include some or all of the configurations of the housing100ofFIG.1.

The housing100may form the exterior of the foldable electronic device110and be foldable around one axis. Hereinafter, the one axis may correspond to a folding axis to be described later.

The housing100may include a bezel350. For example, the bezel350may be formed to extend from a portion configured to form the housing of the side surface of the electronic device110. The bezel350may be disposed along an edge portion of a display module in order to fix the display310to the housing.

The bezel350may be formed to surround a stacked structure on the display310. According to an embodiment, the bezel350may be formed to surround the edge of the display310so as to protect the side surface of the display310.

The flexible display310may be disposed on at least one surface of the housing (100ofFIG.1). According to an embodiment, the flexible display310to be described later may be configured to correspond to the display160ofFIG.1described above.

The window320may be stacked on the flexible display310. The flexible display320may comprises organic light emitting diodes (OLEDs) and thin film transistors (TFT) forming pixels. The window320may be formed of a transparent material and may include at least one of a glass material and a transparent plastic material.

The adhesive layer330may bond the window320and a protective layer340which is disposed on the outermost layer above the flexible display310and of which at least a part is exposed to the outside.

The protective layer340may prevent damage to the window320or the flexible display310.

The adhesive layer330may include a first area331and a second area332. The first area331may comprise a first adhesive, and the second area332may comprise a second adhesive. The first adhesive and the second adhesive may be different and have different properties.

The second area332may be the edge of the adhesive layer330, and the first area331may the central part of the adhesive layer330. For example, the second area332may surround the edge of the first area331.

However, the range of the first area331and the second area332are formed, may not be limited thereto. For example, the second area332may be formed in the central part thereof.

The first adhesive may have a first adhesive strength, and the second adhesive may have a second adhesive strength stronger than the first adhesive strength. For example, the first adhesive may have an adhesive strength within the range of about 0 gf/25 mm to about 10 gf/25 mm, and the second adhesive may have an adhesive strength within the range of about 10 gf/25 mm to about 500 gf/25 mm greater than the first size.

The first area331comprising the first adhesive, may prevent the window320and the protective layer340from separating. For example, the first area331may be configured to prevent the window320and the protective layer340from being separated due to the reduction of the adhesive strength of the adhesive.

The second area332comprising the second adhesive having the second adhesive strength, may bond the window320and the protective layer340.

The adhesive strength of the second adhesive may be weakened differently from the first adhesive. For example, the adhesive strength of the second adhesive may be weakened by an ultraviolet (UV) ray or heat. The second adhesive may include at least one of a monomer or an oligomer, having adhesion strengths that are weakened by a UV ray. According to another embodiment, the second adhesive may have a weak adhesive strength when being foamed by heat. The second area332, onto which the second adhesive is applied, may have an adhesive strength drop to about 0 gf/25 mm by a UV ray or heat.

However, the first adhesive may also have an adhesive strength that is weakened when being foamed by heat.

The adhesive strength of the second area332may be weakened to 0 gf/25 mm, and thus the window320and the protective layer340may be easily separated. According to an embodiment, the window320and the protective layer340may be easily separated so that the protective layer340is easily replaced without replacing the window320.

The bezel350and an area of the stacked structure of the display may be configured to overlap when seen from one axis (e.g., the z axis).

The overlapping area of the bezel350on the one axis (e.g., the z-axis) may be configured to correspond to at least a part of the second area332. For example, referring toFIG.3, when seen from the one axis (e.g., the z-axis), the bezel350may be configured to cover or hide the entirety of the second area332and a part of the first area331. For another example, the bezel350, which is configured to form the exterior of the electronic device110, may be configured to cover or hide only the entirety of the second area332.

The bezel350may be configured to cover the entirety of the second area332, and thus the bezel350may be configured to cover the boundary surface between the first area331and the second area332. Through this, the boundary surface between the first area331and the second area332may not be exposed to the outside of the electronic device110.

The second adhesive forming the second area332, may have lower transparency than the first adhesive. Accordingly, the second area332may have at least a part of a screen output from the display310, that is blocked by the second adhesive, or the second adhesive may be seen from the outside. Accordingly, the second adhesive may be disposed in the second area332covered by the bezel350.

However, the area covered by the bezel350may not be limited thereto. For example, the bezel350may be configured to cover up to a part of the first area331or only a part of the second area332.

The first adhesive may have a transmittance distinct from the second adhesive. The first adhesive may have a first transmittance, and the second adhesive may have a second transmittance.

The first area331comprising the first adhesive, may be positioned on the flexible display310, and be configured to be exposed to the outside. The first transmittance of the first adhesive may be formed within the range of 90% to 100%.

The second area332, onto which the second adhesive is applied, may covered by the bezel350. For example, the second area332may be covered by the bezel350so as to be obscured from the outside. The transmittance of the second adhesive can be freely formed within the range of 0% to 100%.

A specific embodiment related to the adhesive layer330and the adhesive will be described later with reference toFIG.4,FIG.5, andFIG.6.

FIG.4is a view showing an adhesive layer of a display according to an embodiment.

FIG.4is a view showing an area, onto which an adhesive of the adhesive layer330is applied, according to an embodiment. According to an embodiment, a first adhesive and a second adhesive may be applied onto the adhesive layer330.

The adhesive layer330may include a first area331and a second area332.

According to an embodiment, a first adhesive may be applied onto the first area331, and a second adhesive may be applied onto the second area332. The second area332may be applied to at least one area along the edge of the first area331.

For example, the first area331may be applied in a rectangular shape on one plane (e.g., the xy plane), and the second area332may be formed in a rectangular shape to surround the edge of the first area331.

However, the form, in which the first area331and the second area332are applied, may not be limited thereto. For example, the first area and the second area may be formed in various shapes such as a circle or an ellipse. In addition, the second area332may be formed to surround a part of the edge of the first area331.

Referring toFIG.4, The A-A′ axis may mean a folding axis of the electronic device110. The B-B′ axis may mean an axis (hereinafter, a “non-folding axis”) perpendicular to the folding axis of the electronic device110.

Hereinafter, the A-A′ axis to be described later may mean a folding axis, and the B-B′ axis may mean a non-folding axis.

FIG.5is a view showing the surface A-A′ of a display according to an embodiment.

FIG.5is a view showing a stacked structure on a display510of the folding axis AA′ of the electronic device110according to an embodiment.

The electronic device110may include a display510, a window520, an adhesive layer530, and a protective layer540, on the folding axis AA′.

The adhesive layer530may include a first area531comprising a first adhesive, and a second area532comprising a second adhesive, in one area of opposite ends of the first area531.

Referring toFIG.5, The second area532formed around the folding axis AA′ may be formed up to an area configured to surround the edges of the display510and the window520. One surface of the second area532may extend in the first direction (e.g., the −z direction), in the adhesive layer530. For example, a part of the second area532may be configured to extend in the first direction (e.g., the −z direction) so as to surround side parts of the display510and the window520.

A second area532may surround the side surfaces of the display510and the window520so that the second area532protects the side surfaces of the display510and the window520.

In addition, the second area532may fix the display510and the window520to the bezel550. The second area532, which is formed to surround the side parts thereof, may prevent the separation of the display510or the window520due to repeated folding of the electronic device110.

FIG.6is a view showing the surface B-B′ of a display according to another embodiment.

FIG.6is a view showing a stacked structure on a display610of the non-folding axis BB′ of the electronic device110according to an embodiment. The electronic device110on the non-folding axis BB′ may include a display610, a window620, an adhesive layer630, and a protective layer640.

Differently from the adhesive layer530ofFIG.5, a second area632of the adhesive layer630ofFIG.6may be configured so as not extend in one direction (e.g., the −z direction). For example, the second area632may be formed only on the adhesive layer630.

FIG.7is a view showing a cross-section of an adhesive layer of a display according to an embodiment.

According to an embodiment,FIG.7shows a cross-section of an adhesive layer730of an electronic device. For example,FIG.7may show a cross-section (e.g., the yz plane) of the adhesive layer530ofFIG.5of the electronic device100, but may not be limited thereto. For another example, a cross-section (e.g., the xy plane) of the adhesive layer630ofFIG.6may be illustrated therein.

The adhesive layer730may include a first area731and a second area732. For example, the second area732may be formed at opposite ends of the first area731to surround the edge of the first area731.

A central axis C thereof may mean a first axis (e.g., the z axis) of the adhesive layer730. The central axis C is not limited to being positioned at the center of the adhesive layer, and it may be any other height inside the adhesive layer730.

The surface facing the first direction (e.g., the +z direction) of the second area732may be referred to as an upper cross-section, and the surface facing a second direction (e.g., the −z direction) of the second area732may be referred to as a lower cross-section.

The cross-section of the adhesive layer730may be formed as a first structure710or a second structure720.

The first structure710may include a first cross-section711. The first structure710may be a structure in which the width of the second area732, on which the second adhesive is disposed, is uniformly formed.

The second structure720may include a second cross-section712, a third cross-section713, a fourth cross-section714, a fifth cross-section715, a sixth cross-section716, a seventh cross-section717, an eighth cross-section718, and/or a ninth cross-section719.

In first cross-section711, the first area731and the second area732may be formed to be parallel on one axis (e.g., the Z axis). According to an embodiment, in the first cross-section711, the boundary surface between the first area731and the second area732may be formed to be perpendicular to the adhesive layer730. The second area732may be formed from the central axis C of the adhesive layer730in the first axis direction (e.g., the z axis), and the second area732may have a width formed to uniformly extend.

According to an embodiment, in the second cross-section712, the second area732may be formed as a cross-section configured to cover a part of the first area731. The second area732of the second cross-section712may be formed in a trapezoidal shape. For example, the width of the second area732may be gradually increased as going far away from the central axis C in the first direction (e.g., the +z direction). For example, the second area732may have a shape having an upper end wider than a lower end with reference to the central axis C. The second area732may have a shape, in which an upper end thereof is gradually increased more than the lower than, may be configured to physically restrain the first area731on the window (320ofFIG.3). Through this, the second area732may be configured to prevent the first area731from being lifted therefrom.

The third cross-section713may be formed inversely to the second cross-section712. For example, the width of the second area732may be gradually increased as going far away from the central axis C in the second direction (e.g., the −z direction). For example, the second area732may have a shape having an upper end wider than a lower end with reference to the central axis C. The lower end of the second area732may be formed to be wide, and thus the adhesive layer730may be strongly fixed on the window320.

The fourth cross-section714may be formed by combining the second cross-section712and the third cross-section713. According to an embodiment, in the fourth cross-section714, the second area732may be formed to have a width which is symmetrical with reference to the central axis C and gradually increases as extending toward the upper end and lower end thereof. For example, the width of the second area732may gradually decrease as going from the upper end thereof to the central axis C, and then the width of the second area732may gradually increase as going from the central axis C to the lower end thereof. The widths of the upper end and lower end of the second area732may be formed to be symmetrical with reference to the central axis.

The fifth cross-section715may be formed inversely to the fourth cross-section714. According to an embodiment, in the fifth cross-section715, the second area732may be formed to have a width which is gradually decreases as extending from the central axis C to the upper end and lower end thereof. For example, the width of the second area732may gradually increase as going from the upper end thereof to the central axis C, and then the width of the second area732may gradually decreases as going from the central axis C to the lower end thereof. The width of the second region732at the upper end and lower end may be formed to be symmetrical with reference to the central axis.

In the sixth cross-section716, a cross-section of the adhesive layer730, in which the second area732has two layers having different widths, is illustrated therein. According to an embodiment, differently from the second cross-section712, in the second area732of the sixth cross-section716, the second area732of the layer, which is formed at the upper end side of the adhesive layer730, may be formed to have a width wider than the width of the second area732of the layer, which is formed at the lower side thereof. According to an embodiment, with reference to the central axis C, the width of the second area732, which formed to be adjacent to the upper end thereof, may be formed to have a width greater that the width of the second area732formed to be adjacent to the lower end thereof. For example, the cross-section of the second area732may be formed in an inverted-L shape.

In the seventh cross-section717, a cross-section of the adhesive layer730, which has two layers having different widths, is illustrated therein. The seventh cross-section717may be formed inversely to the sixth cross-section716. According to an embodiment, differently from the third cross-section713, in the second area732of the seventh cross-section717, the width of the second area732of the layer, which is formed at the lower end side of the adhesive layer730, may be formed to have a width wider than the width of the second area732of the layer, which is formed at the upper end side thereof. According to an embodiment, with reference to the central axis C, the width of the second area732, which is formed to be adjacent to the lower end thereof, may be formed to have a width greater that the width of the second area732formed to be adjacent to the upper end thereof. For example, the cross-section of the second area732may be formed in an L shape.

In the eighth cross-section718, a cross-section of the adhesive layer730, which has two layers having different widths, is illustrated therein.

The eighth cross-section718may be formed by combining the sixth cross-section716and the seventh cross-section717. According to an embodiment, with reference to the central axis C, the width of the second area732of the eighth cross-section718may have portions which are adjacent to the upper end and the lower end of the adhesive layer730and are formed to have a great width. The width of the second area732of the layer, which is spaced from the central axis C and formed in the upper end and the lower end side of the adhesive layer730, may be formed to have a width greater than the width of the second area732of the layer formed to be adjacent to the central axis C. For example, the cross-section of the second area732of the eighth cross-section718may be formed in a C shape.

According to another embodiment, in the ninth cross-section719, a cross-section of the adhesive layer730, which has two layers having different widths, is illustrated therein.

The ninth cross-section719may be formed inversely to the eighth cross-section718. The width of the second area732of the ninth cross-section719may have a portion which is adjacent to the central axis C and is formed to have a great width. The width of the second area732of the layer, which is formed to be adjacent to the central axis C, may be formed to have a width greater than the width of the second area732of the layer, which is spaced apart from the central axis C and formed on the upper end and the lower end side of the adhesive layer730. For example, the cross-section of the second area732of the ninth cross-section719may be formed in a T shape.

However, the second structure720may not be limited to any one of the first cross-section711to the ninth cross-section719. For example, the cross-section of the adhesive layer730may be formed by combining the third cross-section713and the sixth cross-section716.

FIG.8is a view showing an adhesive layer of a display according to an embodiment.

According to an embodiment,FIG.8is a view showing a differential boundary structure (720ofFIG.7) of an adhesive layer830.

Referring toFIG.8, The adhesive layer830may include a first area831and a second area832. According to an embodiment, an entire boundary surface810between the first area831and the second area832may be formed as at least one of the second structures (720ofFIG.7).

The boundary surface810may be formed as the second structures720ofFIG.7, and thus the second area832may fix the first area831on a window (321ofFIG.3). For example, the boundary surface810between the second area832and the first area831may be formed as the second cross-section712ofFIG.7.

The boundary surface810may be formed as the second structure712ofFIG.7, and thus the second area832may structurally fix the first area831. By the structural fixation, the second area832may prevent the first area831from separating from the window320.

However, it may not be limited thereto, and the boundary surface810may be formed as the first structure710ofFIG.7.

FIG.9is a view showing an adhesive layer of a display according to another embodiment.

FIG.9is a view showing a second structure (720ofFIG.7) for each area of adhesive layer930.

The A-A′ axis may mean a folding axis, and the B-B′ axis may mean a non-folding axis. According to an embodiment, a boundary surface910between a first area931and a second area932may include a first boundary surface911having the folding axis AA′ as the center thereof and a second boundary surface912which is perpendicular to the first boundary surface911and has the non-folding axis BB′ as the center thereof. The second boundary surface912may include the first cross-section711ofFIG.7, and the first boundary surface911may include the second structure720ofFIG.7. For example, the first boundary surface911may be formed as the second cross-section712. According to an embodiment, a first area931and a second area932, which are adjacent to the folding axis AA′, may be strongly coupled by the second cross-section712of the first boundary surface911.

The second area932may be configured to prevent the first area1031from being separated from a window (321ofFIG.3) of the adhesive layer930due to folding, by the second structure720ofFIG.7.

FIG.10is a view showing an adhesive layer of a display according to another embodiment.

FIG.10is a view showing another differential boundary structure for each area of an adhesive layer1030.

The boundary surface between the first area1031and the second area1032may include a first surface (e.g., the xz plane) perpendicular to the folding axis AA′ and a second surface (e.g., the yz plane) perpendicular to the first surface and parallel to the folding axis AA′.

The first surface (e.g., xz plane) may include a first boundary surface1041adjacent to the folding axis AA′ and parallel to the non-folding axis BB′, and a second boundary surface1042which is spaced apart from the folding axis AA′ and is parallel to the non-folding axis BB′. The second surface (e.g., the yz plane) may include a third boundary surface1043parallel to the folding axis AA′.

The second boundary surface1042and the third boundary surface1043may include the first cross-section711ofFIG.7. The first boundary surface1041may include the second structure720ofFIG.7. For example, the first boundary surface1041may include the second cross-section712ofFIG.7.

Differently from the first boundary surface911ofFIG.9, the first boundary surface1041ofFIG.10may include the second structure720having a reduced range, and thus the adhesive layer1030may have a structure which can be easily manufactured.

FIG.11is a view showing an adhesive layer of a display according to another embodiment.

FIG.11is a view showing a differential width of the adhesive layer930.

A second area1132may include a first portion1121, a second portion1122, and a third portion1123. The boundary surface between a first area1131and a second area1132may include a first surface (e.g., the xz plane) perpendicular to the folding axis AA′ and a second surface (e.g., the yz plane) perpendicular to the first surface and parallel to the folding axis AA′.

A first surface (e.g., the xy plane) may include the first portion1121and the second portion1122, and a second surface (e.g., the yz plane) may include the third portion1123. The first portion1121to the third portion1123may mean the width of the second area1132.

The first portion1121may be adjacent to the folding axis AA′ and may be formed on the first surface. The second portion1122may be spaced apart from the folding axis AA′ and may be formed on the first surface.

The first portion1121, the second portion1122, and the third portion1123may be formed to have different widths.

The first portion1121may have a first width, and the second portion1122and the third portion1123may have a second width smaller than the first size. For example, the first portion1121of the second area1132may be configured to extend in a direction toward the inside of the electronic device and thus may be formed to be wide.

The first portion1121may be formed to be adjacent to the folding axis AA′, and thus the first portion1121may be configured to prevent an adhesive layer1130from being lifted from a window (321ofFIG.3) due to the repeated folding operations of the electronic device.

FIG.12is a view showing an adhesive layer of a display according to another embodiment.

FIG.12is a view showing a structure in which the second structure720of the adhesive layer930and a differential width structure are combined.

A second area1232may include the first portion1121, the second portion1122, and the third portion1123. The boundary surface between the first area1231and the second area1232may include a first surface (e.g., the xz plane) perpendicular to the folding axis AA′ and a second surface (e.g., the yz plane) perpendicular to the first surface and parallel to the folding axis AA′.

The first surface (e.g., the xy plane) may include a first portion1221and a second portion1222, and the second surface (e.g., the yz plane) may include a third portion1223having the non-folding axis BB′ as the center thereof. The first portion1221may be formed on the first surface adjacent to the folding axis AA′, and the second portion1222may be formed on the first surface to be spaced apart from the folding axis AA′. The first portion1221to the third portion1223may mean the width of the second area1232.

The first portion1221adjacent to the folding axis AA′ may be formed to have a structure in which the second structure720ofFIG.10and the differential width structure ofFIG.11are combined.

For example, the first portion1221may have a first width on the second area1232, and the second portion1222and the third portion1223may have a second width smaller than the first size. In addition, the second portion1222and the third portion1223may include the first cross-section711ofFIG.7.

The first portion1221may include the second structure720ofFIG.7. For example, the boundary surface of the first portion1221may include the second cross-section712ofFIG.7. The first portion1221may be formed to have a wide width to include a second cross-section712, and thus the first portion1221may be configured to prevent the adhesive layer1230from being lifted due to a folding operation of the electronic device.

FIG.13is a view showing a stacked structure of a display according to an embodiment.

Referring toFIG.13is a view showing multiple windows1340and an adhesive layer1360stacked on a flexible display1310of an electronic device (110ofFIG.1) according to an embodiment.

The electronic device110may include a flexible display1310, multiple windows1340, multiple adhesive layers1360, and a housing (100ofFIG.1).

The housing100, which is configured to form the exterior of the electronic device110, may include a bezel disposed at a position corresponding to a bezel area1350on a second window1342. The multiple windows1340may include a first window1341bonded onto the flexible display1310and a second window1342bonded onto the first window1341and exposed to the outside.

The multiple adhesive layers1360may include a first adhesive layer1361bonding the flexible display1310and the first window1341, and a second adhesive layer1362bonding the first window1341and the second window1342.

The multiple adhesive layers1360may include first areas1331and1333comprising a first adhesive, and second areas1332and1334comprising a second adhesive. The second areas1332and1334may include the bezel area1350. The second areas1332and1334may be formed along the edges of the first areas1331and1333. According to an embodiment, a bezel, which is disposed on the bezel area1350, may cover the boundary surfaces between the second areas1332and1334and the first areas1331and1333.

The adhesive layer1360may comprise the first adhesive and the second adhesive of which the adhesive strength can be weakened. For example, the first areas1331and1333may comprise the first adhesive, and the second areas1332and1334may comprise the second adhesive.

The second area1332of the first adhesive layer1361may be applied by the second adhesive including at least one of a monomer or an oligomer of which the adhesive strengths are weakened by an ultraviolet (UV) ray. The second area1334of the second adhesive layer1362may be applied by the second adhesive having a weak adhesive strength when being foamed by heat.

However, the order and configuration of the adhesive layer1360, onto which the second adhesive is applied, may not be limited thereto. For example, the first adhesive layer1361may be applied by the second adhesive having a weak adhesive strength when being foamed by heat.

According to an embodiment, multiple windows1340may be selectively separated by the second adhesive of which the adhesive strength can be weakened.

For example, the adhesive strength of the second area1334of the second adhesive layer1362may be weakened by a UV ray.

Through this, the second window1342, which is bonded to the second adhesive layer1362, may be selectively separated from the electronic device110. According to an embodiment, at least one of the multiple windows1340may be selectively separated from the electronic device110, so as to easily replace a broken window.

However, the adhesive, of which the adhesive strength can be weakened, may not be limited to the second adhesive. For example, the adhesive strength of the first adhesive may also be weakened.

FIG.14is a view showing the process of processing an adhesive layer according to an embodiment.

Referring toFIG.14, according to an embodiment, a process1401may include a process of cutting a second area1413of an adhesive layer1410. The process1401may include a process in which the degree of inclination in the cutting direction of a knife blade1412for cutting an adhesive layer is adjusted so as to cut at least a part of the second area1413.

A process1402may include a process of combining the second area1413, which is cut in the process1401, to a first area1414applied in advance. For example, the process1402may include a lamination process.

A process1403may include a process of applying the second area1413, which is cut in the process1401, onto a window1421and then applying the first area1414to the inner space of a second area1413.

The process of processing the adhesive layer may include the process1401and the process1402, or may include the process1401and the process1403.

FIG.15is a block diagram illustrating an electronic device1501in a network environment1500according to certain embodiments. Referring toFIG.15, the electronic device1501in the network environment1500may communicate with an electronic device1502via a first network1598(e.g., a short-range wireless communication network), or at least one of an electronic device1504or a server1508via a second network1599(e.g., a long-range wireless communication network). The electronic device1501may communicate with the electronic device1504via the server1508. The electronic device1501may include a processor1520, memory1530, an input module1550, a sound output module1555, a display module1560, an audio module1570, a sensor module1576, an interface1577, a connecting terminal1578, a haptic module1579, a camera module1580, a power management module1588, a battery1589, a communication module1590, a subscriber identification module (SIM)1596, or an antenna module1597. In some embodiments, at least one of the components (e.g., the connecting terminal1578) may be omitted from the electronic device1501, or one or more other components may be added in the electronic device1501. In some embodiments, some of the components (e.g., the sensor module1576, the camera module1580, or the antenna module1597) may be implemented as a single component (e.g., the display module1560).

The processor1520may execute, for example, software (e.g., a program1540) to control at least one other component (e.g., a hardware or software component) of the electronic device1501coupled with the processor1520, and may perform various data processing or computation. According to one embodiment, as at least part of the data processing or computation, the processor1520may store a command or data received from another component (e.g., the sensor module1576or the communication module1590) in volatile memory1532, process the command or the data stored in the volatile memory1532, and store resulting data in non-volatile memory1534. The processor1520may include a main processor1521(e.g., a central processing unit (CPU) or an application processor (AP)), or an auxiliary processor1523(e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction with, the main processor1521. For example, when the electronic device1501includes the main processor1521and the auxiliary processor1523, the auxiliary processor1523may be adapted to consume less power than the main processor1521, or to be specific to a specified function. The auxiliary processor1523may be implemented as separate from, or as part of the main processor1521.

The auxiliary processor1523may control at least some of functions or states related to at least one component (e.g., the display module1560, the sensor module1576, or the communication module1590) among the components of the electronic device1501, instead of the main processor1521while the main processor1521is in an inactive (e.g., sleep) state, or together with the main processor1521while the main processor1521is in an active state (e.g., executing an application). The auxiliary processor1523(e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module1580or the communication module1590) functionally related to the auxiliary processor1523. The auxiliary processor1523(e.g., the neural processing unit) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed, e.g., by the electronic device1501where the artificial intelligence is performed or via a separate server (e.g., the server1508). Learning algorithms may include, but are not limited to, e.g., supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-network or a combination of two or more thereof but is not limited thereto. The artificial intelligence model may, additionally or alternatively, include a software structure other than the hardware structure.

The memory1530may store various data used by at least one component (e.g., the processor1520or the sensor module1576) of the electronic device1501. The various data may include, for example, software (e.g., the program1540) and input data or output data for a command related thereto. The memory1530may include the volatile memory1532or the non-volatile memory1534.

The program1540may be stored in the memory1530as software, and may include, for example, an operating system (OS)1542, middleware1544, or an application1546.

The input module1550may receive a command or data to be used by another component (e.g., the processor1520) of the electronic device1501, from the outside (e.g., a user) of the electronic device1501. The input module1550may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

The sound output module1555may output sound signals to the outside of the electronic device1501. The sound output module1555may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record. The receiver may be used for receiving incoming calls. The receiver may be implemented as separate from, or as part of the speaker.

The display module1560may visually provide information to the outside (e.g., a user) of the electronic device1501. The display module1560may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. The display module1560may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch.

The audio module1570may convert a sound into an electrical signal and vice versa. The audio module1570may obtain the sound via the input module1550, or output the sound via the sound output module1555or a headphone of an external electronic device (e.g., an electronic device1502) directly (e.g., wiredly) or wirelessly coupled with the electronic device1501.

A connecting terminal1578may include a connector via which the electronic device1501may be physically connected with the external electronic device (e.g., the electronic device1502). The connecting terminal1578may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector).

The haptic module1579may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. The haptic module1579may include, for example, a motor, a piezoelectric element, or an electric stimulator.

The camera module1580may capture a still image or moving images. The camera module1580may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module1588may manage power supplied to the electronic device1501. According to one embodiment, the power management module1588may be implemented as at least part of, for example, a power management integrated circuit (PMIC).

The battery1589may supply power to at least one component of the electronic device1501. The battery1589may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell.

The communication module1590may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device1501and the external electronic device (e.g., the electronic device1502, the electronic device1504, or the server1508) and performing communication via the established communication channel. The communication module1590may include one or more communication processors that are operable independently from the processor1520(e.g., the application processor (AP)) and supports a direct (e.g., wired) communication or a wireless communication. The communication module1590may include a wireless communication module1592(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 module1594(e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network1598(e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network1599(e.g., a long-range communication network, such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module1592may identify and authenticate the electronic device1501in a communication network, such as the first network1598or the second network1599, using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module1596.

The antenna module1597may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device1501. The antenna module1597may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). The antenna module1597may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network1598or the second network1599, may be selected, for example, by the communication module1590(e.g., the wireless communication module1592) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module1590and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module1597.

According to an embodiment, commands or data may be transmitted or received between the electronic device1501and the external electronic device1504via the server1508coupled with the second network1599. Each of the electronic devices1502or1504may be a device of a same type as, or a different type, from the electronic device1501. According to an embodiment, all or some of operations to be executed at the electronic device1501may be executed at one or more of the external electronic devices1502,1504, or1508. For example, if the electronic device1501should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device1501, instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device1501. The electronic device1501may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device1501may provide ultra low-latency services using, e.g., distributed computing or mobile edge computing. In another embodiment, the external electronic device1504may include an internet-of-things (IoT) device. The server1508may be an intelligent server using machine learning and/or a neural network. The external electronic device1504or the server1508may be included in the second network1599. The electronic device1501may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology.

A foldable electronic device according to certain embodiments may include a flexible display disposed on a front surface of the foldable electronic device, a housing configured to form the exterior of the foldable electronic device and foldable around a folding axis, the housing including a bezel formed along an edge of the flexible display, a window stacked on the flexible display, and an adhesive layer bonding the window to another element, the adhesive layer comprising a first area comprising a first adhesive, and a second area which is formed along an edge of the first area, and has an area which corresponds to the bezel, the second area comprising a second adhesive, wherein a strength of the second adhesive can be weakened in a different manner than the strength of the first adhesive.

According to an embodiment, the second area is adjacent to the folding axis, covers a part of the edge of the first area fixing the first area to the window.

According to an embodiment, the second area may include a first portion having a first width and a second portion having a second width smaller than the first width, and the first portion may be formed to be adjacent around the folding axis.

According to an embodiment, the second area may include a first portion having a first width and a second portion having a second width than the first width, and the second portion of the second area may be adjacent around the folding axis, and covers a part of the edge of the first area, which is adjacent around the folding axis fixing the first area to the window.

According to an embodiment, the second adhesive comprises an adhesive, wherein an adhesive strength of the adhesive is weakened when being foamed by heat.

According to an embodiment, the second adhesive may include at least one of a monomer and an oligomer having an adhesive strength that is by an ultraviolet (UV) ray.

According to an embodiment, the second adhesive may have a higher adhesive strength than the first adhesive.

According to an embodiment, the window may be formed of a transparent material.

According to an embodiment, boundary between the first area and the second area may be covered by a bezel.

According to an embodiment, the another layer comprises a protective layer.

According to an embodiment, the second area is formed on the folding axis, surrounds edges of the flexible display and the window fixing the display and the window.

According to certain embodiments, a foldable electronic device comprises: a flexible display disposed on a front surface of the foldable electronic device; a housing configured to form an exterior of the foldable electronic device and be foldable around an axis, the housing comprising a bezel formed along an edge of the flexible display; a first window bonded to the flexible display; and a second window bonded on the first window having one side exposed to an outside of the foldable electronic device; and an adhesive layer disposed between the flexible display and the first window bonding the flexible display and the first window, wherein the adhesive layer comprises: a first area comprising a first adhesive; and a second area formed along an edge of the first area, having an area corresponding to the bezel, the second area comprising a second adhesive; wherein an adhesive strength of the second adhesive can be weakened in a different way from the first adhesive.

According to an embodiment, the adhesive layer may include a first adhesive layer bonding the flexible display and the first window, and a second adhesive layer bonding the first window and the second window, the second adhesive of the first adhesive layer may include at least one of a monomer or an oligomer of which adhesive strengths are weakened by an ultraviolet (UV) ray or when being foamed by heat.

According to an embodiment, a boundary surface between the first area of the adhesive layer and the second area of the adhesive layer may be covered by the bezel.

According to an embodiment, the second window is exposed to an outside by the second adhesive of the second adhesive layer and is selectively separable.

According to certain embodiments, a foldable electronic device comprises: a flexible display disposed on a front surface of the foldable electronic device; a housing forming an exterior of the foldable electronic device and foldable around a folding axis, the housing comprising a bezel formed along an edge of the flexible display; a window stacked on the flexible display; and an adhesive layer bonding the window and another element of the flexible display, wherein the adhesive layer comprises: a first area, which is exposed to an outside comprising a first adhesive; and a second area covered by the bezel and formed along an edge of the first area, comprising a second adhesive; wherein an adhesive strength of the second adhesive can be weakened in a different way from the first adhesive.

According to an embodiment, the second area is adjacent to the folding axis and covers a part of the edge of the first area fixing the first area to the window.

According to an embodiment, an adhesive strength of the second adhesive is weakened when being foamed by heat.

According to an embodiment, the window may be formed of a transparent material.

According to an embodiment, a protective layer, which is bonded on the window by the adhesive layer, may be included therein.