KR20210112642A - Foldable electronic device including anti-wrinkle layer of display - Google Patents

Abstract

Various embodiments of the present invention relates to a foldable electronic apparatus including an anti-wrinkle layer of a display comprising: a foldable housing folded at least partially; and a flexible display shown through the front of the foldable housing and folded at least partially. The flexible display may comprise: a base layer; a display panel formed on the base layer and including an organic light emitting layer; and an anti-wrinkle layer formed on the display panel and preventing a wrinkle generated from the base layer.

Description

FOLDABLE ELECTRONIC DEVICE INCLUDING ANTI-WRINKLE LAYER OF DISPLAY

Various embodiments of the present invention relate to a foldable electronic device including an anti-wrinkle layer of a display.

BACKGROUND Electronic devices are being mass-produced in various shapes, out of a uniform rectangular shape. For example, recently, a foldable electronic device in which at least two housings operate in a manner that is folded or unfolded with respect to each other has been released.

The foldable electronic device may include a flexible display in which at least a part of the housing is folded according to an operation in which the housing is folded and unfolded. The flexible display may include a display panel, and may include at least one protective film disposed on a rear surface of the display panel or disposed on a front surface of the display panel.

The protective film can be formed of a polymer material, and when a constant strain is applied, it has a creep property that changes its shape over time, and stress relaxation in which the stress decreases over time after deformation occurs. can have characteristics.

In the foldable electronic device, when the flexible display is repeatedly bent, plastic deformation occurs in the protective film made of a polymer material, and wrinkles may be recognized in the flexible display due to the plastic deformation.

In a foldable electronic device, the protective film may not sufficiently protect the display panel. For example, a protective film made of a polymer film may not protect the display panel from the impact of the external material when a sharp foreign material (eg, a pen) falls from the surface of the flexible display, and marks may be generated on the flexible display. .

According to various embodiments of the present disclosure, it is possible to provide a foldable electronic device capable of preventing wrinkles of a flexible display by including an anti-wrinkle layer and protecting the display panel from the impact of a falling sharp foreign material.

An electronic device according to various embodiments of the present disclosure includes a foldable housing in which at least a portion is folded, and a flexible display that is viewed through a front surface of the foldable housing and is at least partially folded, wherein the flexible display includes: a base layer; It may include a display panel formed on the base layer and including an organic light emitting layer, and an anti-wrinkle layer formed on the display panel to suppress wrinkles generated from the base layer.

An electronic device according to various embodiments of the present disclosure includes a foldable housing that is at least partially folded using a hinge, and a flexible display that is viewed through a front surface of the foldable housing and is at least partially folded, the flexible display comprising: , a base layer, an anti-wrinkle layer formed on the base layer to suppress wrinkles generated from the base layer, and a display panel formed on the anti-wrinkle layer and including an organic light emitting layer.

A flexible display according to various embodiments of the present invention includes a base layer, a display panel formed on the base layer and including an organic light emitting layer, and an anti-wrinkle layer formed on the display panel to suppress wrinkles generated from the base layer. may include

A flexible display according to various embodiments of the present invention includes a base layer, an anti-wrinkle layer formed on the base layer to suppress wrinkles generated from the base layer, and a display panel formed on the anti-wrinkle layer and including an organic light emitting layer may include

The foldable electronic device according to various embodiments of the present disclosure may include an anti-wrinkle layer, thereby preventing plastic deformation of the flexible display and protecting the flexible display from the impact of a falling sharp external material.

1 is a diagram illustrating an unfolded state of an electronic device according to various embodiments of the present disclosure;
FIG. 2 is a view illustrating a folded state of the electronic device of FIG. 1 according to various embodiments of the present disclosure;
3 is an exploded perspective view of an electronic device according to various embodiments of the present disclosure;
4 is a schematic cross-sectional view of an electronic device including a flexible display according to a comparative example.
5 is a cross-sectional view schematically illustrating a laminated structure of a flexible display according to a comparative example.
6 is an example illustrating plastic deformation of a flexible display according to a comparative example.
7 is a schematic cross-sectional view of an electronic device including a flexible display according to an embodiment of the present invention.
8 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to an embodiment of the present invention.
9 is an example illustrating an anti-wrinkle effect of a flexible display according to an exemplary embodiment.
10 is a schematic cross-sectional view of an electronic device including a flexible display according to another embodiment of the present invention.
11 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to another embodiment of the present invention.
12 is a schematic cross-sectional view of an electronic device 1200 including a flexible display according to another embodiment of the present invention.
13 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to another embodiment of the present invention.
14 is an example illustrating the anti-wrinkle effect of the flexible display according to another embodiment of the present invention.
15 is a schematic cross-sectional view of an electronic device including a flexible display according to another embodiment of the present invention.
16 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to another embodiment of the present invention.

1 is a diagram illustrating an unfolded state of an electronic device 100 according to various embodiments of the present disclosure. FIG. 2 is a view illustrating a folded state of the electronic device 100 of FIG. 1 according to various embodiments of the present disclosure.

Referring to FIG. 1 , the electronic device 100 includes a pair of housings 110 and 120 (eg, a folder) that are rotatably coupled through a hinge (eg, the hinge 164 of FIG. 3 ) to be folded with respect to each other. housing structure), a hinge cover (eg, the hinge cover 165 of FIG. 2 ) that covers the foldable portions of the pair of housings 110 and 120, and a space formed by the pair of housings 110 and 120 It may include a display 130 (eg, a flexible display, a foldable display, or a first display) disposed on the .

In this document, the surface on which the display 130 is disposed may be defined as the front surface of the electronic device 100 , and the opposite surface of the front surface may be defined as the rear surface of the electronic device 100 .

In this document, a surface surrounding the space between the front surface and the rear surface may be defined as a side surface of the electronic device 100 .

In this document, a direction that the front surface faces may be defined as a first direction, and a direction that the rear surface faces may be defined as a second direction.

In describing the stacking order (eg, the stacking order of the display) in this document, “layer B is formed on the layer A” may mean that the layer B is formed in the first direction from the layer A. Alternatively, in describing the stacking order (eg, the stacking order of the display) in this document, “the B layer is formed under the A layer” may mean that the B layer is formed in the second direction from the A layer. .

In one embodiment, the pair of housings 110 and 120 includes a first housing 110 , a second housing 120 , a first rear cover 140 , and a second rear cover including a sensor region 131d ( 150) may be included. The pair of housings 110 and 120 of the electronic device 100 is not limited to the shape and combination shown in FIGS. 1 and 2 , and may be implemented by a combination and/or combination of other shapes or parts. For example, in another embodiment, the first housing 110 and the first rear cover 140 may be integrally formed, and the second housing 120 and the second rear cover 150 may be integrally formed. can

According to an embodiment, the first housing 110 and the second housing 120 may be disposed on both sides about the folding axis (axis A), and may have an overall symmetrical shape with respect to the folding axis (axis A). . According to an embodiment, the first housing 110 and the second housing 120 are in the state of the electronic device 100 in an unfolding state (flat stage or unfolding state), a folding state, or an intermediate state. Depending on whether or not they are recognized, the angle or distance formed from each other may vary. According to an embodiment, the first housing 110 additionally includes a sensor region 131d in which various sensors are disposed, unlike the second housing 120 , but may have a mutually symmetrical shape in other regions. In another embodiment, the sensor area 131d may be additionally disposed or replaced in at least a partial area of the second housing 120 .

In an embodiment, the electronic device 100 rotates the first housing 110 with respect to the second housing 120 through a hinge (eg, the hinge 164 in FIG. 3 ) in a range of 0 degrees to 360 degrees. It may be operated in an in-folding manner and/or in an out-folding manner. According to various embodiments, the hinge 164 may be formed in a vertical direction or a horizontal direction when the electronic device 100 is viewed from above. According to various embodiments, the number of hinges 164 may be plural. For example, all of the plurality of hinges may be arranged in the same direction. As another example, some of the hinges may be arranged in different directions and folded.

In an embodiment, the first housing 110 is connected to a hinge (eg, the hinge 164 of FIG. 3 ) in an unfolded state of the electronic device 100 , and is disposed to face the front of the electronic device 100 . The first surface 111 , the second surface 112 facing the opposite direction of the first surface 111 , and the first surrounding at least a portion of the space between the first surface 111 and the second surface 112 . It may include a side member 113 . In one embodiment, the first side member 113 includes a first side member 113a disposed parallel to the folding axis (axis A), and a first side member extending from one end of the first side member 113a in a direction perpendicular to the folding axis. The second side surface 113b and the third side surface 113c extending in a direction perpendicular to the folding axis (A axis) from the other end of the first side surface 113a may be included.

In an embodiment, the second housing 120 is connected to a hinge (eg, the hinge 164 of FIG. 3 ) in an unfolded state of the electronic device 100 , and is disposed to face the front of the electronic device 100 . The third surface 121 , the fourth surface 122 facing the opposite direction of the third surface 121 , and the second surrounding at least a portion of the space between the third surface 121 and the fourth surface 122 . It may include a side member 123 . In one embodiment, the second side member 123 is a fourth side member 123a disposed parallel to the folding axis (axis A), a direction perpendicular to the folding axis (axis A) from one end of the fourth side member 123a It may include a sixth side surface 123c extending in a direction perpendicular to the folding axis (A axis) from the other end of the fifth side surface 123b and the fourth side surface 123a extending to the In an embodiment, the third surface 121 may face the first surface 111 in a folded state.

In an embodiment, the electronic device 100 may include a recess 101 formed to accommodate the display 130 through the structural shape coupling of the first housing 110 and the second housing 120 . . The recess 101 may have substantially the same size as the display 130 . In one embodiment, due to the sensor region 131d, the recess 101 may have two or more different widths in a direction perpendicular to the folding axis (A axis). For example, the recess 101 is formed at the edge of the first portion 120a parallel to the folding axis (A axis) of the second housing 120 and the sensor area 131d of the first housing 110 . The first width W1 between the first portion 110a, and the second portion 120b of the second housing 110 and the folding axis ( It may have a second width W2 formed by the second portion 110b parallel to the axis A). In this case, the second width W2 may be formed to be longer than the first width W1 . For example, the recess 101 has a first width W1 formed from the first portion 110a of the first housing 110 having a mutually asymmetric shape to the first portion 120a of the second housing 120 and , may be formed to have a second width W2 formed from the second portion 110b of the first housing 110 having a mutually symmetrical shape to the second portion 120b of the second housing 120 . In an embodiment, the first portion 110a and the second portion 110b of the first housing 110 may be formed to have different distances from the folding axis (axis A). The width of the recess 101 is not limited to the illustrated example. In one embodiment, the recess 101 may have two or more different widths due to the shape of the sensor area 131d or the portion having the asymmetric shape of the first housing 110 and the second housing 120 . .

In an embodiment, at least a portion of the first housing 110 and the second housing 120 may be formed of a metal material or a non-metal material having a rigidity of a size selected to support the display 130 .

In an embodiment, the sensor area 131d may be formed to have a predetermined area adjacent to one corner of the first housing 110 . However, the arrangement, shape, or size of the sensor area 131d is not limited to the illustrated example. For example, in another embodiment, the sensor area 131d may be provided in another corner of the first housing 110 or in an arbitrary area between the upper corner and the lower corner. In another embodiment, the sensor area 131d may be disposed on at least a partial area of the second housing 120 . In another embodiment, the sensor area 131d may be disposed to extend to the first housing 110 and the second housing 120 . In an embodiment, the electronic device 100 has various functions arranged to be exposed on the front surface of the electronic device 100 through the sensor area 131d or through one or more openings provided in the sensor area 131d. It can be components for performing In an embodiment, the components may include, for example, at least one of a front camera device, a receiver, a proximity sensor, an illuminance sensor, an iris recognition sensor, an ultrasonic sensor, or an indicator.

In one embodiment, the first back cover 140 may be disposed on the second surface 112 of the first housing 110 and may have a substantially rectangular periphery. In an embodiment, at least a portion of the edge may be surrounded by the first housing 110 . Similarly, the second rear cover 150 may be disposed on the fourth surface 122 of the second housing 120 , and at least a portion of an edge thereof may be surrounded by the second housing 120 .

In the illustrated embodiment, the first back cover 140 and the second back cover 150 may have a substantially symmetrical shape with respect to the folding axis (A axis). In another embodiment, the first back cover 140 and the second back cover 150 may include various shapes different from each other. In another embodiment, the first rear cover 140 may be integrally formed with the first housing 110 , and the second rear cover 150 may be integrally formed with the second housing 120 .

In an embodiment, the first back cover 140 , the second back cover 150 , the first housing 110 , and the second housing 120 are various components of the electronic device 100 through a structure coupled to each other. A space may be provided in which devices (eg, a printed circuit board, an antenna module, a sensor module, or a battery) may be disposed. In an embodiment, one or more components may be disposed or visually exposed on the rear surface of the electronic device 100 . For example, one or more components or sensors may be visually exposed through the first rear region 141 of the first rear cover 140 . In one embodiment the sensor may include a proximity sensor, a rear camera device and/or a flash. In another embodiment, at least a portion of the sub-display 152 (eg, the second display) may be visually exposed through the second rear region 151 of the second rear cover 150 . In another embodiment, the electronic device 100 may include a speaker module 153 disposed through at least a partial area of the second rear cover 150 .

The display 130 may be disposed on a space formed by the pair of housings 110 and 120 . For example, the display 130 may be seated in a recess 101 formed by the pair of housings 110 and 120 , and occupy substantially the majority of the front surface of the electronic device 100 . can be placed. Accordingly, the front surface of the electronic device 100 has the display 130 and a partial region (eg, an edge region) of the first housing 110 adjacent to the display 130 and a partial region (eg, an edge) of the second housing 120 . area) may be included. In an embodiment, the rear surface of the electronic device 100 includes a first back cover 140 , a partial area (eg, an edge area) of the first housing 110 adjacent to the first back cover 140 , and a second back cover 150 and a partial region (eg, an edge region) of the second housing 120 adjacent to the second rear cover 150 .

In an embodiment, the display 130 may refer to a display in which at least a partial area can be deformed into a flat surface or a curved surface. In an embodiment, the display 130 has a folding area 131c, a first area 131a disposed on one side (eg, a right area of the folding area 131c) with respect to the folding area 131c, and the other side (eg, a right area of the folding area 131c). : A second area 131b disposed on the left side of the folding area 131c may be included. For example, the first area 131a is disposed on the first surface 111 of the first housing 110 , and the second area 131b is disposed on the third surface 121 of the second housing 120 . can be In an embodiment, division of regions of the display 130 is exemplary, and the display 130 may be divided into a plurality (eg, four or more or two) regions according to a structure or function. For example, in the embodiment shown in FIG. 1 , the region of the display 130 may be divided by the folding region 131c extending parallel to the y-axis or the folding axis (A-axis), but in another embodiment, the display ( 130) may be divided into regions based on another folding region (eg, a folding region parallel to the x-axis) or another folding axis (eg, a folding axis parallel to the x-axis). The above-described area division of the display is only a physical division by a pair of housings 110 and 120 and a hinge (eg, the hinge 164 in FIG. 3), and substantially a pair of housings 110 and 120 and a hinge ( Example: One full screen may be displayed on the display 130 through the hinge 164 of FIG. 3 . In an embodiment, the first region 131a and the second region 131b may have a symmetrical shape with respect to the folding region 131c. However, unlike the second region 131b, the first region 131a is a notch region cut according to the presence of the sensor region 131d (eg, the notch region 133 of FIG. 3 ). may be included, but in other regions, it may have a symmetrical shape to the second region 131b. For example, the first region 131a and the second region 131b may include a portion having a shape symmetrical to each other and a portion having a shape asymmetrical to each other.

Referring to FIG. 2 , the hinge cover 165 is disposed between the first housing 110 and the second housing 120 to cover internal parts (eg, the hinge 164 in FIG. 3 ). can In an embodiment, the hinge cover 165 includes the first housing 110 and the second housing 120 according to the operating state (flat state or folded state) of the electronic device 100 . ) may be covered by a part of it or exposed to the outside.

For example, as shown in FIG. 1 , when the electronic device 100 is in an unfolded state, the hinge cover 165 may not be exposed because it is covered by the first housing 110 and the second housing 120 . For example, as shown in FIG. 2 , when the electronic device 100 is in a folded state (eg, a completely folded state), the hinge cover 165 is formed with the first housing 110 and the second housing ( 120) can be exposed to the outside. For example, when the first housing 110 and the second housing 120 are in an intermediate state that is folded with a certain angle, the hinge cover 165 is the first housing 110 . and between the second housing 120 and at least partially exposed to the outside of the electronic device 100 . In this case, the exposed area may be less than in a fully folded state. In one embodiment, the hinge cover 165 may include a curved surface.

Hereinafter, the operation of the first housing 110 and the second housing 120 and the display 130 according to the operating state of the electronic device 100 (eg, a flat state and a folded state) Each area is described.

In an embodiment, when the electronic device 100 is in a flat state (eg, the state of FIG. 1 ), the first housing 110 and the second housing 120 form an angle of 180 degrees, and The first region 131a and the second region 131b may be disposed to face the same direction. Also, the folding region 131c may form the same plane as the first region 131a and the second region 131b. In another embodiment, when the electronic device 100 is in a flat state, the first housing 110 and the second housing 120 are arranged so that the second surface 112 and the fourth surface 122 face each other. When folded in the opposite direction, the first area 131a and the second area 131b of the display may be disposed to face in opposite directions with respect to each other.

In an embodiment, when the electronic device 100 is in a folded state (eg, the state of FIG. 2 ), the first housing 110 and the second housing 120 may be disposed to face each other. The first area 131a and the second area 131b of the display 130 form a narrow angle (eg, between 0 degrees and 10 degrees) with each other, and may face each other. At least a portion of the folding region 131c may be formed as a curved surface having a predetermined curvature.

In an embodiment, when the electronic device 100 is in an intermediate state, the first housing 110 and the second housing 120 may be disposed at a certain angle to each other. The first area 131a and the second area 131b of the display 130 may form an angle larger than the folded state and smaller than the unfolded state. At least a portion of the folding region 131c may be formed of a curved surface having a predetermined curvature, and the curvature in this case may be smaller than that in a folded state.

3 is an exploded perspective view of an electronic device 100 according to various embodiments of the present disclosure.

Referring to FIG. 3 , in an embodiment, the electronic device 100 includes a display 130 , a support member assembly 160 , at least one printed circuit board 170 , a first housing 110 , and a second housing ( 120 ), a first rear cover 140 , and a second rear cover 150 may be included. In this document, the display unit 130 (eg, the first display) may be referred to as a display module or a display assembly.

The display 130 may include a display panel 131 (eg, a flexible display panel) and one or more plates 132 or layers on which the display panel 131 is mounted. In an embodiment, the one or more plates 132 may include a conductive plate (eg, Cu sheet or SUS sheet) disposed between the display panel 131 and the support member assembly 160 . According to an embodiment, the conductive plate may be formed to have substantially the same area as the display, and the area facing the folding area of the display may be formed to be bendable. The plate 132 may include at least one auxiliary material layer (eg, a graphite member) disposed on the rear surface of the display panel 131 . In one embodiment, the plate 132 may be formed in a shape corresponding to the display panel 131 . For example, a partial area of the first plate 132 may be formed in a shape corresponding to the notch area 133 of the display panel 131 .

The support member assembly 160 includes a first support member 161 (eg, a first support plate), a second support member 162 (eg, a second support plate), a first support member 161 and a second support member. The hinge 164 disposed between the members 162, the hinge cover 165 covering the hinge 164 when viewed from the outside, and the first support member 161 and the second support member 162 are crossed The device may include at least one wiring member 163 (eg, a flexible printed circuit board (FPCB)).

In an embodiment, the support member assembly 160 may be disposed between the plate 132 and the at least one printed circuit board 170 . For example, the first support member 161 may be disposed between the first area 131a of the display 130 and the first printed circuit board 171 . The second support member 162 may be disposed between the second region 131b of the display 130 and the second printed circuit board 172 .

In an embodiment, at least a portion of the wiring member 163 and the hinge 164 may be disposed inside the support member assembly 160 . The wiring member 163 may be disposed in a direction (eg, an x-axis direction) crossing the first support member 161 and the second support member 162 . The wiring member 163 may be disposed in a direction (eg, the x-axis direction) perpendicular to the folding axis (eg, the y-axis or the folding axis A of FIG. 1 ) of the folding area 131c.

In one embodiment, the at least one printed circuit board 170 is, as mentioned above, on the side of the first printed circuit board 171 and the second support member 162 disposed on the first support member 161 side. A second printed circuit board 172 may be disposed. The first printed circuit board 171 and the second printed circuit board 172 include a support member assembly 160 , a first housing 110 , a second housing 120 , a first back cover 140 and a second It may be disposed inside the space formed by the rear cover 150 . Components for implementing various functions of the electronic device 100 may be mounted on the first printed circuit board 171 and the second printed circuit board 172 .

In an embodiment, in the first space of the first housing 110 , the first printed circuit board 171 is disposed in the space formed through the first support member 161 , and the first swell of the first support member 161 . A first battery 191 , at least one sensor module 181 , or at least one camera module 182 may be included at a position facing the ring hole 1611 . The first housing 110 is a window glass 183 disposed to protect the at least one sensor module 181 and the at least one camera module 182 at a position corresponding to the notch area 133 of the display 130 . may include. In one embodiment, in the second space of the second housing 120 , the second printed circuit board 172 and the second support member 162 are disposed in the second space formed through the second support member 162 . A second battery 192 disposed at a position facing the second swelling hole 1621 may be included. According to an embodiment, the first housing 110 and the first support member 161 may be integrally formed. According to an embodiment, the second housing 120 and the second support member 162 may also be integrally formed. According to an embodiment, the sub-display 152 may be disposed in the second space of the second housing 120 . According to an embodiment, the sub-display 152 (eg, the second display) may be disposed to be visible from the outside through at least a partial area of the second back cover 150 .

In one embodiment, the first housing 110 may include a first rotation support surface 114 , and the second housing 120 has a second rotation support surface ( ) corresponding to the first rotation support surface 114 . 124) may be included. The first rotation support surface 114 and the second rotation support surface 124 may include curved surfaces corresponding to the curved surfaces included in the hinge cover 165 .

In an embodiment, when the electronic device 100 is in an unfolded state (eg, the state of FIG. 1 ), the first rotation support surface 114 and the second rotation support surface 124 cover the hinge cover 165 to make a hinge The cover 165 may not be exposed to the rear surface of the electronic device 100 or may be minimally exposed. In an embodiment, the first rotation support surface 114 and the second rotation support surface 124 are included in the hinge cover 165 when the electronic device 100 is in a folded state (eg, the state of FIG. 2 ). By rotating along the curved surface, the hinge cover 165 may be maximally exposed to the rear surface of the electronic device 100 .

comparative example

4 is a schematic cross-sectional view of an electronic device including a flexible display according to a comparative example. 5 is a cross-sectional view schematically illustrating a laminated structure of a flexible display according to a comparative example.

Referring to FIG. 4 , the electronic device 400 according to the comparative example may include a first housing 310 , a second housing 320 , or a flexible display 401 .

The first housing 310 and the second housing 320 may be rotatable with respect to each other in a range of 0 degrees to 360 degrees. In FIG. 4 , 'H' may be a 'hinge region'.

The flexible display 401 may be disposed on a space formed by the first housing 310 and the second housing 320 . For example, the flexible display 401 may be seated on the first support member 491 of the first housing 310 and the second support member 492 of the second housing 320 . The flexible display 401 may be attached to the first support member 491 and the second support member 492 by an adhesive member 470 .

The first housing 310 may include a first side member 313 surrounding the space, and the first side member 313 may be coupled to the first protection frame 340 . In one embodiment, the first housing 310 may be integrally formed with the first protective frame 340 . The first protective frame 340 may cover at least a portion of a non-display area (eg, a BM area or a non-viewing area) of the flexible display 401 .

The second housing 320 may include a second side member 323 surrounding the space, and the second side member 323 may be coupled to the second protection frame 350 . In an embodiment, the second housing 320 may be integrally formed with the second protective frame 350 . The second protective frame 350 may cover the non-display area of the flexible display 401 .

Referring to FIG. 5 , the flexible display 401 may include a protection member 410 , a window unit 420 , a display unit 430 , or a buffer unit (eg, cushion, sponge) 440 . In the flexible display 401 , a metal sheet part 450 may be further formed under the buffer part 440 .

The protection member 410 , the window part 420 , the display part 430 , the buffer part 440 , or the metal sheet part 450 may be attached to each other by the adhesive member 460 . The adhesive member 460 may be a pressure sensitive adhesive (PSA). For example, the adhesive member 460 may include a first PSA 461 to which the protection member 410 and the window 420 are attached, and a second PSA 462 to which the window 420 and the display 430 are attached. ), a third PSA 463 to which the display unit 430 and the buffer 440 are attached, or a fourth PSA 464 to which the buffer 440 and the metal sheet 450 are attached. .

The display unit 430 includes a base layer (eg, PI) 433 including a substrate, a display panel 432 formed on the base layer 433 and including an organic light emitting layer, or a polarized light formed on the display panel 432 . layer 431 . The base layer 433 may be a base film or a protective film (eg, a patterned film). Alternatively, the base layer 433 may include a protective film (eg, a patterned film) and a base film laminated on the protective film. The protective film (eg, a patterned film) may be a film for protecting the lower portion of the flexible display 401 during the manufacturing process of the flexible display 401 .

The window unit 420 (or the first window member) may be formed on the display unit 430 and may be a component for covering the front surface of the display unit 430 . The window unit 420 may include a window 422 formed on the polarization layer 431 of the display unit 430 or a coating layer 421 formed on the window 422 . In another embodiment, the coating layer 421 may be formed under the window 422 . According to various embodiments, an anti-shattering film may be additionally formed under the window 422 .

The protection member 410 (or the second window member) is formed on the window portion 420 and may be a component for protecting the window portion 420 . The protective member 410 may include a polymer layer 412 made of polyethyleneterephthalate (PET), or a protective film 411 formed on the polymer layer 412 and including a coating layer and/or a functional layer. .

The buffer unit 440 is formed under the display unit 430 and may prevent damage to the lower portion of the display unit 430 due to an external impact. The buffer 440 may include a polymer member, and a dark color (eg, black) may be applied.

The metal sheet part 450 may be formed under the buffer part 440 . The metal sheet part 450 may be steel use stainless (SUS) or a metal support part (eg, lattice metal) including patterns such as openings and recesses.

6 is an example illustrating plastic deformation of a flexible display according to a comparative example.

Referring to FIG. 6 , the flexible display (eg, 401 of FIGS. 4 and 5 ) according to the comparative example has most of the laminated materials, for example, a protection member 410 , a window unit 420 , a display unit 430 , and a buffer. The unit 440 may include a polymer film made of a polymer material.

The polymer film may have a creep property that changes its shape over time when a constant 　 strain is applied, and a stress relaxation property in which the stress decreases over time after deformation occurs.

Due to the above characteristics, when bending is repeatedly applied to at least some laminated materials of the flexible display 401 including the polymer film, plastic deformation may occur. The plastic deformation of the laminate material including the polymer film may cause wrinkles to be recognized in the flexible display 401 . For example, when the base layer 433 disposed under the display panel 432 is repeatedly subjected to bending, plastic deformation may occur, which may be a major cause of wrinkles in the flexible display 401 .

The plastic deformation of the base layer 433 may mainly occur in the periphery of the hinge region H. A segmented portion to which the metal sheet portion 450 is not continuously connected is formed in the hinge region H, and irregularities may be formed on a surface on which the flexible display 401 is seated due to the segmented portion. Alternatively, an adhesive member 470 for attaching the flexible display 401 to the periphery of the hinge region H may be disposed, and the surface on which the flexible display 401 is seated has irregularities due to the adhesive member 470 . can be formed. A portion of the base layer 433 overlapping the unevenness may receive more attractive force or tension during bending, and plastic deformation may occur when bending is repeated.

When plastic deformation occurs in a bent form in a portion of the base layer 433 , the materials stacked on the base layer 433 are also bent and wrinkles can be visually recognized on the surface of the flexible display 401 .

An electronic device according to various embodiments of the present disclosure includes a foldable housing at least partially folded, and a flexible display (eg, 701 in FIG. 7 ) that is viewed through the front surface of the foldable housing and is at least partially folded, The flexible display 701 includes a base layer (eg, 723 in FIG. 7 ), a display panel (eg, 722 in FIG. 7 ) formed on the base layer (eg, 723 in FIG. 7 ) and including an organic light emitting layer (eg, 722 in FIG. 7 ), and An anti-wrinkle layer (eg, 721 of FIG. 7 ) formed on the display panel 722 to suppress wrinkles generated from the base layer 723 may be included. The flexible display 701 may further include a polarization layer formed on the anti-wrinkle layer 721 . The flexible display 701 may further include a window formed on the polarization layer. The anti-wrinkle layer 721 may be formed of a glass material. The anti-wrinkle layer 721 may be formed of ultra thin glass (UTG) having a Young's modulus of 5 GPa to 100 Gpa and a thickness of 50 μm or less.

An embodiment of the present invention (an anti-wrinkle layer and a polarizing layer are formed on the display panel)

7 is a schematic cross-sectional view of an electronic device including a flexible display according to an embodiment of the present invention. 8 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to an embodiment of the present invention.

The electronic device 700 shown in FIGS. 7 and 8 is the same as or at least partially similar to the electronic device 100 shown in FIG. 1 , and may further include another embodiment. Referring to FIG. 7 , in an electronic device 700 according to an embodiment of the present invention, the flexible display 701 includes an anti-wrinkle layer 721 unlike the electronic device 401 of the comparative example shown in FIGS. 4 to 6 . can do. Hereinafter, it will be described in detail.

Referring to FIG. 7 , an electronic device according to an embodiment of the present invention may include a first housing 310 , a second housing 320 , or a flexible display 701 .

The first housing 310 and the second housing 320 may be rotatable with respect to each other in a range of 0 degrees to 360 degrees. In FIG. 7 , 'H' may be a 'hinge region'.

The flexible display 701 may be disposed on a space formed by the first housing 310 and the second housing 320 . For example, the flexible display 701 may be seated on the first support member 791 of the first housing 310 and the second support member 792 of the second housing 320 . The flexible display 701 may be attached to the first support member 791 and the second support member 792 by an adhesive member 770 .

The first housing 310 may include a first side member 313 surrounding the space, and the first side member 313 may be coupled to the first protection frame 340 . The first protective frame 340 may cover a non-display area (eg, a bezel area) of the flexible display 701 .

The second housing 320 may include a second side member 323 surrounding the space, and the second side member 323 may be coupled to the second protection frame 350 . The second protective frame 350 may cover a non-display area (eg, a bezel area) of the flexible display 701 .

Referring to FIG. 8 , the flexible display 701 according to an embodiment may include a protection member 710 , a display unit 720 , or a buffer unit 730 . In the flexible display 701 according to an embodiment, a metal sheet part 740 may be further formed under the buffer part 730 .

In an embodiment, the protection member 710 , the display unit 720 , the buffer unit 730 , or the metal sheet unit 740 may be attached to each other by the adhesive member 750 . The adhesive member 750 may be a pressure sensitive adhesive (PSA). In another embodiment, the adhesive member 750 may include at least one of an optical clear adhesive (OCA), a pressure sensitive adhesive (PSA), a heat-reactive adhesive, a general adhesive, and a double-sided tape. In an embodiment, the adhesive member 750 includes the first PSA 751 for attaching the protective member 710 and the display unit 720 , and the wrinkle-free layer 721 and the display panel 722 in the display unit 720 . ) to which the second PSA 752 is attached, the third PSA 753 to which the display unit 720 and the buffer unit 730 are attached, or the fourth PSA to which the buffer unit 730 and the metal sheet unit 740 are attached PSA 754 may be included. In one embodiment, the first PSA 751 may be designed to have a lower adhesive force or a thinner thickness than the other PSAs 752 , 753 , and 754 .

The display unit 720 may include a base layer 723 , a display panel 722 formed on the base layer 723 and including an organic light emitting layer, or an anti-wrinkle layer 721 formed on the display panel 722 . .

The base layer 723 may include a base film (eg, PI) and/or a protective film (eg, a patterned film) formed under the base film. The base layer 723 is a film (or substrate) made of a flexible material that can be bent and may be made of a synthetic resin. In one embodiment, the base layer 723 is polyethylene terephthalate (PET: polyethylene terephthalate), polyethylene naphthalate (PEN: polyethylene naphthalate), polyethylene sulfide (PES: polyethylene sulfide), polyethylene (PE: polyethylene), polyimide (PI: polyimide) may include at least one material.

The display panel 722 is formed on the base layer 723 and includes a TFT layer including a plurality of thin film transistors (TFTs) based on low temperature polysilicon (LTPS), an organic light emitting layer formed on the TFT layer, or It may include an encapsulation layer formed on the organic light emitting layer. In an embodiment, the encapsulation layer may be a thin film encapsulation (TFE).

The anti-wrinkle layer 721 is formed on the display panel 722 and may be made of a stiffer material than other layers. For example, the anti-wrinkle layer 721 may be formed of a glass material. The anti-wrinkle layer 721 may prevent plastic deformation of laminated materials (eg, the base layer 723 ) including a polymer material in the flexible display 701 . The anti-wrinkle layer 721 is formed under the anti-wrinkle layer 721, even if bent plastic deformation occurs from the laminated materials (eg, the base layer 723) of the polymer material, the bent plastic deformation of the anti-wrinkle layer 721 It can serve as a flat film that prevents it from being transmitted upward. The anti-wrinkle layer 721 may serve to protect the laminated materials formed under the anti-wrinkle layer 721 from the impact of a sharp foreign material falling.

In an embodiment, the anti-wrinkle layer 721 may be formed of ultra thin glass (UTG) having a Young's modulus of 5 GPa to 100 Gpa and a thickness of 50 μm or less.

The protection member 710 may be formed on the display unit 720 and may be a component for covering the front surface of the display unit 720 . The protective member 710 may include a polarizing layer 712 formed on the anti-wrinkle layer 721 of the display unit 720 , or a protective film 711 formed on the polarizing layer 712 .

The polarization layer 712 may polarize the incident light incident to the display panel 722 and the reflected light reflected from the display panel 722 .

The protective film 711 may be a coating layer (eg, a hard coating layer (HC)) and/or a functional layer. The coating layer can improve reliability by reducing distortion or lifting of the window under severe conditions such as high temperature or high humidity, and can also absorb external shocks. The functional layer (eg AF) may be an anti-finger coating layer, an anti-fouling coating layer, an anti-reflection coating layer, or an anti-glare coating layer. layer) may be at least one.

The buffer unit 730 is formed under the display unit 720 and may prevent damage to the lower portion of the display unit 720 due to an external impact. The buffer unit 730 may include a polymer member, and a dark color (eg, black) may be applied.

The metal sheet part 740 is formed under the buffer part 730 and may be SUS (steel use stainless).

9 is an example illustrating the anti-wrinkle effect of the flexible display 701 according to an exemplary embodiment. For example, FIG. 9 may be an example explaining the anti-wrinkle effect of the flexible display 701 shown in FIGS. 7 and 8 .

As described with reference to FIG. 6 , the flexible display 701 according to the comparative example may have a wrinkle issue in the hinge region H during repeated bending.

Referring to FIG. 9 , the flexible display 701 according to an embodiment of the present invention includes an anti-wrinkle layer 721 to suppress plastic deformation and prevent wrinkles from occurring.

For example, as illustrated, when the electronic device 700 is switched from the folded state to the folded state, the first support member of the first housing and the second support member of the second housing move in the hinge region H direction. A contracting force (eg, 903 in FIG. 9 ) may be applied. A contracting force (eg, 903 in FIG. 9 ) may be transmitted to the flexible display 701 stacked on the first and second support members, and thus the flexible display 701 also contracts in the hinge region H direction. A force (eg, 903 in FIG. 9 ) may be received.

When the contracting force (eg, 903 of FIG. 9 ) is applied to the flexible display 701 , the portion overlapping the concave-convex surface located at the bottom of the flexible display 701 may receive attractive force or tension intensively.

In an embodiment, a portion of the flexible display 701 that overlaps with the convex portion of the concave-convex surface may be strongly contracted as shown in ①.

In one embodiment, when the anti-wrinkle layer 721 receives a tension contracting as in ① in the portion where the base layer 723 overlaps with the convex portion of the uneven surface, the base layer 723 expands as in ② tension can be applied. Accordingly, the base layer 723 is less stressed when bending by the anti-wrinkle layer 721 , and plastic deformation can be prevented.

In one embodiment, the anti-wrinkle layer 721 is a wrinkle generated in the base layer 723 under the anti-wrinkle layer 721 by applying a tension to the base layer 723 in the direction of expansion as in ② as the above laminated material. can be prevented from being transmitted. Accordingly, in the flexible display 701 according to an exemplary embodiment, even if plastic deformation or wrinkles occur in the base layer 723 , wrinkles may not be visible on the outer surface of the flexible display 701 .

In an embodiment, a portion of the flexible display 701 that overlaps with the concave portion of the concave-convex surface may be strongly subjected to a contracted tension as shown in (3).

In one embodiment, the anti-wrinkle layer 721 is the base layer 723 in a portion overlapping with the convex portion of the concave-convex surface, when receiving a contracting tension as shown in ③, the direction of expansion as shown in ④ to the base layer 723 tension can be applied. Accordingly, the base layer 723 is less stressed when bending by the anti-wrinkle layer 721 , and plastic deformation can be prevented.

In one embodiment, the anti-wrinkle layer 721 is the anti-wrinkle layer 721 by applying tension to the base layer 723 in the expansion direction as in ④, so that the wrinkles generated in the base layer 723 under the anti-wrinkle layer 721 are formed as the above laminated material. can be prevented from being transmitted. Accordingly, in the flexible display 701 according to an exemplary embodiment, even if plastic deformation or wrinkles occur in the base layer 723 , wrinkles may not be visible on the outer surface of the flexible display 701 .

In the above, the uneven surface may be formed around the hinge region (H). For example, a segmented portion in which the metal sheet portion 740 is not continuously connected may be formed in the hinge region H, and irregularities may be formed on a surface on which the flexible display 701 is mounted due to the segmented portion. Alternatively, an adhesive member for attaching the flexible display 701 may be disposed around the hinge region H, and irregularities may be formed on a surface on which the flexible display 701 is mounted due to the adhesive member.

Another embodiment of the present invention (a window is further formed on the polarizing layer in comparison with FIGS. 7-9 )

10 is a schematic cross-sectional view of an electronic device 1000 including a flexible display 1001 according to another embodiment of the present invention. 11 is a cross-sectional view schematically illustrating a stacked structure of the flexible display 1001 according to another embodiment of the present invention.

The flexible display 1001 illustrated in FIGS. 10 and 11 may further include the same or similar or different embodiment to the flexible display 701 illustrated in FIGS. 7 to 9 . For example, the flexible display 1001 illustrated in FIGS. 10 and 11 may further include a window 1012 unlike the flexible display 701 illustrated in FIGS. 7 to 9 . The window 1012 may be formed between the polarization layer 1021 and the protective film 1011 . Hereinafter, it demonstrates concretely.

The flexible display 1001 may include a protection member 1010 , a display unit 1020 , or a buffer unit 1030 . The flexible display 1001 may further include a metal sheet part 1040 under the buffer part 1030 .

The protection member 1010 , the display unit 1020 , the buffer unit 1030 , or the metal sheet unit 1040 may be attached to each other by the adhesive member 1050 . The adhesive member 1050 may be a pressure sensitive adhesive (PSA). According to the illustrated example, the adhesive member 1050 includes the first PSA 1051 for attaching the protective member 1010 and the display unit 1020, and the wrinkle-free layer 1022 and the display panel (1020) within the display unit (1020). A second PSA 1052 for attaching 1023 , a third PSA 1053 for attaching the display unit 1020 and the buffer unit 1030 , or a first for attaching the buffer unit 1030 and the metal sheet unit 1040 . 4 PSA 1054 may be included.

The display unit 1020 includes a base layer 1024 , a display panel 1023 formed on the base layer 1024 and including an organic light emitting layer, an anti-wrinkle layer 1022 formed on the display panel 1023 , or an anti-wrinkle layer 1022 . ) may include a polarization layer 1021 formed thereon.

The protection member 1010 may be formed on the display unit 1020 and may be a component for covering the front surface of the display unit 1020 . The protective member 1010 may include a window 1012 formed on the polarization layer 1021 of the display unit 1020 or a protective film 1011 formed on the window 1012 . The window 1012 may be formed of at least one of polyethylene terephthalate (PET) and polyimide (PI). The protective film 1011 may be a hard coating layer (HC) and/or a functional layer (AF).

The buffer unit 1030 is formed under the display unit 1020 and may prevent damage to the lower portion of the display unit 1020 due to an external impact. The buffer unit 1030 may include a polymer member, and a dark color (eg, black) may be applied.

The metal sheet part 1040 is formed under the buffer part 1030 and may be SUS (steel use stainless).

Since the flexible display 1001 shown in FIGS. 10 and 11 includes the anti-wrinkle layer 1022, the same or similar to the flexible display 701 shown in FIGS. : It is possible to prevent plastic deformation of the base layer 1024) and to protect the flexible display 1001 from the impact of a falling sharp foreign material.

The flexible display 1001 according to the exemplary embodiment shown in FIGS. 10 and 11 may have the following advantages compared to the structure using UTG as a window.

(i) Since the anti-wrinkle layer 1022 is positioned under the polarizing layer 1021 , it is possible to prevent wrinkles generated in the base layer 1024 from being transferred to the laminated material on the anti-wrinkle layer 1022 .

(ii) the anti-shattering coating may be unnecessary since the anti-wrinkle layer 1022 is not exposed to the outside.

(iii) Since the anti-wrinkle layer 1022 is formed close to the display panel 1023 in which the neutral layer is located, it is possible to reduce the repulsive force during bending.

(iv) the anti-wrinkle layer 1022 is positioned under the window 1012 to prevent damage.

Meanwhile, the flexible display 701 according to the exemplary embodiment shown in FIGS. 7 to 9 may have the following advantages compared to the flexible display 701 shown in FIGS. 10 and 11 .

(v) the window (eg, the window 1012 of FIG. 10 ) can be deleted by disposing the polarizing layer 712 positioned below the window (eg, the window 1012 of FIG. 10 ) thereon, and thus the thickness of the flexible display 701 can save

(vi) Repulsive force during bending may be reduced due to a decrease in the thickness of the flexible display 701 .

An electronic device (eg, 1200 in FIG. 12 ) according to various embodiments of the present disclosure includes a foldable housing that is at least partially folded using a hinge, and a flexible display that is viewed through the front surface of the foldable housing and is at least partially folded (eg, 1201 of FIG. 12 ), and the flexible display 1201 is formed on a base layer (eg, 1223 of FIG. 12 ), the base layer 1223 , and wrinkles generated from the base layer 1223 . It may include an anti-wrinkle layer (eg, 1222 of FIG. 12 ) that suppresses the wrinkle, and a display panel (eg, 1221 of FIG. 12 ) formed on the anti-wrinkle layer 1222 and including an organic light emitting layer. The flexible display 1201 may further include a polarization layer (eg, 1212 of FIG. 12 ) formed on the anti-wrinkle layer 1222 . The flexible display 1201 may further include a window (eg, 1512 of FIG. 15 ) formed on the polarization layer 1212 . The anti-wrinkle layer 1222 may be formed of a glass material. The anti-wrinkle layer 1222 may be formed of ultra thin glass (UTG) having a Young's modulus of 5 GPa to 100 Gpa and a thickness of 50 μm or less.

Another embodiment of the present invention (in comparison with FIGS. 7-9, an anti-wrinkle layer is formed under the display panel, and a polarizing layer is formed on the display panel)

12 is a schematic cross-sectional view of an electronic device 1200 including a flexible display according to another embodiment of the present invention. 13 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to another embodiment of the present invention. 14 is an example illustrating the anti-wrinkle effect of the flexible display according to another embodiment of the present invention.

The flexible display 1201 illustrated in FIGS. 12 to 14 may further include the same, similar, or different embodiment to the flexible display 701 illustrated in FIGS. 7 to 9 . For example, in the flexible display 1201 shown in FIGS. 12 to 14 , unlike the flexible display 701 shown in FIGS. 7 to 9 , the anti-wrinkle layer 1222 includes the base layer 1223 and the display panel 1221 . can be formed in between.

The flexible display 701 may include a protection member 1210 , a display unit 1220 , or a buffer unit 1230 . The flexible display 701 may further include a metal sheet unit 1240 under the buffer unit 1230 .

The protection member 1210 , the display unit 1220 , the buffer unit 1230 , or the metal sheet unit 1240 may be attached to each other by the adhesive member 1250 . The adhesive member 1250 may be a pressure sensitive adhesive (PSA). According to the illustrated example, the adhesive member 1250 includes a first PSA 1251 to which the protection member 1210 and the display unit 1220 are attached, and a second PSA to which the display unit 1220 and the buffer unit 1230 are attached. 1251 , or a third PSA 1253 for attaching the buffer part 1230 and the metal sheet part 1240 may be included.

The display unit 1220 is formed on the base layer 1223 , the anti-wrinkle layer 1222 formed on the base layer 1223 , or the anti-wrinkle layer 1222 , and includes a low-temperature polycrystalline silicon (LTPS), a thin film transistor (TFT). film transistor) and/or a display panel 1221 including an organic light emitting layer. According to some embodiments, unlike the illustrated example, the base layer 1223 may be omitted.

The protection member 1210 may be formed on the display unit 1220 and may be a component for covering the front surface of the display unit 1220 . The protective member 1210 may include a polarization layer 1212 formed on the display panel 1221 of the display unit 1220 and a protective film 1211 formed on the polarization layer 1212 . The protective film 1211 may be a hard coating layer (HC) and/or a functional layer (AF).

The buffer unit 1230 is formed under the display unit 1220 and may prevent damage to the lower portion of the display unit 1220 due to an external impact. The buffer unit 1230 may include a polymer member, and a dark color (eg, black) may be applied.

The metal sheet part 1240 is formed under the buffer part 1230 and may be SUS (steel use stainless).

Since the flexible display 1201 shown in FIGS. 12 to 14 includes the anti-wrinkle layer 1222, the same or similar to the flexible display 701 shown in FIGS. : It is possible to prevent plastic deformation of the base layer 1223) and protect the flexible display 701 from the impact of a sharp foreign material falling.

In the flexible display 1201 shown in FIGS. 12 to 14 , the anti-wrinkle layer 1222 is formed under the display panel 1221 , and thus, unlike the flexible display 701 shown in FIGS. 7 to 9 , the anti-wrinkle layer 1222 is formed. It can be formed of an opaque material.

Another embodiment of the present invention (a window is further formed on the polarizing layer in comparison with FIGS. 12-14 )

15 is a schematic cross-sectional view of an electronic device including a flexible display according to another embodiment of the present invention. 16 is a cross-sectional view schematically illustrating a stacked structure of a flexible display according to another embodiment of the present invention.

The flexible display 1501 illustrated in FIGS. 15 and 16 may further include the same or similar or different embodiment to the flexible display 1201 illustrated in FIGS. 12 to 14 . For example, the flexible display 1501 illustrated in FIGS. 15 and 16 may further include a window 1512 unlike the flexible display 1201 illustrated in FIGS. 12 to 14 . The window 1512 may be formed between the polarization layer 1521 and the protective film 1511 . Hereinafter, it demonstrates concretely.

The flexible display 1501 may include a protection member 1510 , a display unit 1520 , or a buffer unit 1530 . The flexible display 1501 may further include a metal sheet part 1540 under the buffer part 1530 .

The protection member 1510 , the display unit 1520 , the buffer unit 1530 , or the metal sheet unit 1540 may be attached to each other by the adhesive member 750 . The adhesive member 750 may be a pressure sensitive adhesive (PSA). According to the illustrated example, the adhesive member 750 includes the first PSA 1551 for attaching the protective member 1510 and the display unit 1520 , and the display panel 1522 and the polarization layer 1521 in the display unit 1520 . ) to which the second PSA 1552 is attached, the third PSA 1553 to which the display unit 1520 and the buffer unit 1530 are attached, or the fourth PSA to which the buffer unit 1530 and the metal sheet unit 1540 are attached PSA 1554 may be included.

The display unit 1520 includes a base layer 1524 , an anti-wrinkle layer 1523 formed on the base layer 1524 , a display panel 1522 formed on the anti-wrinkle layer 1523 and including an organic light emitting layer, or a display panel 1522 . ) may include a polarization layer 1521 formed thereon. According to some embodiments, unlike the illustrated example, the base layer 1524 may be omitted.

The protection member 1510 may be formed on the display unit 1520 and may be a component for covering the front surface of the display unit 1520 . The protective member 1510 may include a window 1512 formed on the polarization layer 1521 of the display unit 1520 or a protective film 1511 formed on the window 1512 . The window 1512 may be formed of at least one of polyethylene terephthalate (PET) and polyimide (PI). The protective film 1511 may be a hard coating layer (HC) and/or a functional layer (AF).

The buffer unit 1530 is formed under the display unit 1520 and may prevent damage to the lower portion of the display unit 1520 due to an external impact. The buffer unit 1530 may include a polymer member, and a dark color (eg, black) may be applied.

The metal sheet part 1540 is formed under the buffer part 1530 and may be SUS (steel use stainless).

Since the flexible display 1501 shown in FIGS. 15 and 16 includes the anti-wrinkle layer 1523, the same or similar to the flexible display 701 shown in FIGS. : It is possible to prevent plastic deformation of the base layer 1524) and to protect the flexible display 1501 from the impact of a sharp foreign material falling.

723: base layer
721: anti-wrinkle layer

Claims (20)

In an electronic device,
a foldable housing at least partially folded; and
and a flexible display that is viewed through the front surface of the foldable housing and is at least partially folded, the flexible display comprising:
base layer,
A display panel formed on the base layer and including an organic light emitting layer, and
and an anti-wrinkle layer formed on the display panel to suppress wrinkles generated from the base layer.
The method of claim 1,
The flexible display further comprises a polarizing layer formed on the anti-wrinkle layer, the electronic device.
3. The method of claim 2,
The flexible display further includes a window formed on the polarization layer.
The method of claim 1,
The anti-wrinkle layer is formed of a glass material, the electronic device.
5. The method of claim 4,
The anti-wrinkle layer has a Young's modulus of 5 GPa to 100 Gpa, and is formed of ultra thin glass (UTG) having a thickness of 50 μm or less.
In an electronic device,
a foldable housing at least partially folded using a hinge; and
and a flexible display that is viewed through the front surface of the foldable housing and is at least partially folded, wherein the flexible display comprises:
base layer,
An anti-wrinkle layer formed on the base layer to suppress wrinkles generated from the base layer, and
and a display panel formed on the anti-wrinkle layer and including an organic light emitting layer.
7. The method of claim 6,
The flexible display further comprises a polarizing layer formed on the anti-wrinkle layer, the electronic device.
8. The method of claim 7,
The flexible display further includes a window formed on the polarization layer.
7. The method of claim 6,
The anti-wrinkle layer is formed of a glass material, the electronic device.
10. The method of claim 9,
The anti-wrinkle layer has a Young's modulus of 5 GPa to 100 Gpa, and is formed of ultra thin glass (UTG) having a thickness of 50 μm or less.
In the flexible display at least a part is folded,
base layer,
A display panel formed on the base layer and including an organic light emitting layer, and
A flexible display comprising an anti-wrinkle layer formed on the display panel to suppress wrinkles generated from the base layer.
12. The method of claim 11,
A flexible display, further comprising a polarizing layer formed on the anti-wrinkle layer.
13. The method of claim 12,
The flexible display further comprising a window formed on the polarizing layer.
12. The method of claim 11,
The anti-wrinkle layer is formed of a glass material, a flexible display.
15. The method of claim 14,
The anti-wrinkle layer has a Young's modulus of 5 GPa ~ 100 Gpa, and is formed of UTG (ultra thin glass) having a thickness of 50 μm or less, a flexible display.
In the flexible display at least a part is folded,
base layer,
An anti-wrinkle layer formed on the base layer to suppress wrinkles generated from the base layer, and
A flexible display comprising a display panel formed on the anti-wrinkle layer and including an organic light emitting layer.
17. The method of claim 16,
A flexible display, further comprising a polarizing layer formed on the anti-wrinkle layer.
18. The method of claim 17,
The flexible display further comprising a window formed on the polarizing layer.
17. The method of claim 16,
The anti-wrinkle layer is formed of a glass material, a flexible display.
20. The method of claim 19,
The anti-wrinkle layer has a Young's modulus of 5 GPa ~ 100 Gpa, and is formed of UTG (ultra thin glass) having a thickness of 50 μm or less, a flexible display.

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