Display device including a winder

A display device including: a display panel configured to display an image; and a winder configured to fix a first end portion of the display panel thereinto, wherein the winder includes a first fixing portion including a first external surface which is curved, and a second fixing portion that includes a second external surface which is curved and that faces the first external surface, wherein the first end portion of the display panel may be interposed between the first external surface and the second external surface.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2016-0084846 filed in the Korean Intellectual Property Office on Jul. 5, 2016, the disclosure of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

The present inventive concept relates to a display device.

DESCRIPTION OF THE RELATED ART

There are a variety of known display devices, which include a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED) display, a field effect display (FED), an electrophoretic display, and the like.

For example, the OLED display includes two electrodes and an organic emission layer interposed therebetween. Electrons injected from one electrode and holes injected from the other electrode are combined in the organic emission layer to generate excitons. The generated excitons release energy to emit light.

The OLED display may be light-weight and thin. In addition, the OLED display has high quality characteristics such as low power consumption, high luminance, and high response speed.

Currently, foldable display devices that can be folded or unfolded and rollable display devices that can be rolled are being developed. To increase the lifetime of the foldable display devices or the rollable display devices, the amount of stress applied to the display panels thereof can be minimized.

SUMMARY

An exemplary embodiment of the present inventive concept provides a display device including: a display panel configured to display an image; and a winder configured to fix a first end portion of the display panel thereinto, wherein the winder may include a first fixing portion including a first external surface which is curved, and a second fixing portion that includes a second external surface which is curved and that faces the first external surface, wherein the first end portion of the display panel may be interposed between the first external surface and the second external surface.

The first external surface may include a first curved surface convexly protruded in a first direction, and a second curved surface that is adjacent to the first curved surface and that is concavely protruded in a second direction.

A curvature radius of the first curved surface may be the same as that of the second curved surface.

A curvature radius of the first curved surface may be different from that of the second curved surface.

The second external surface may include a third curved surface that faces the first curved surface, and a fourth curved surface that is adjacent to the third curved surface, and faces the second curved surface.

A curvature radius of the third curved surface may be the same as that of the fourth curved surface.

A curvature radius of the third curved surface may be different from that of the fourth curved surface.

A curvature radius of the first curved surface may be the same as that of the third curved surface.

A curvature radius of the second curved surface may be the same as that of the fourth curved surface.

The winder may have a cylindrical shape.

The first end portion of the display panel may be wound on the winder.

An adhesive layer may be interposed between the display panel and the first external surface or between the display panel and the second external surface.

The display panel may include a display area for displaying an image and a peripheral area positioned at a periphery of the display area, and the peripheral area of the display panel may be inserted in and fixed to the winder.

The display device may further include a fastening portion that fixes the first fixing portion and the second fixing portion to each other.

The fastening portion may include a bolt passing through the first fixing portion and the second fixing portion, and a nut for engaging with the bolt.

The fastening portion may include a first protrusion disposed at a first end portion of the first fixing portion, a second protrusion disposed at a second end portion of the second fixing portion, and a case configured to receive the first protrusion and the second protrusion.

The first fixing portion and the second fixing portion may be respectively made of stainless steel (SUS), Invar, nickel, cobalt, aluminum, titanium, an alloy thereof, an acryl, or wood.

An exemplary embodiment of the present inventive concept provides a display device including: a display panel configured to display an image; and a winder configured to be connected with a first end portion of the display panel, wherein the winder includes a cut-out groove in which the first end portion of the display panel is inserted and fixed.

The cut-out groove may include a first exposed surface and a second exposed surface facing each other, the first exposed surface may be curved, and the second exposed surface may be curved.

The first exposed surface may include a first curved surface convexly protruded in a first direction, and a second curved surface that is adjacent to the first curved surface and is concavely protruded in a second direction.

A curvature radius of the first curved surface may be the same as that of the second curved surface.

A curvature radius of the first curved surface may be different from that of the second curved surface.

The second exposed surface may include a third curved surface that faces the first curved surface, and a fourth curved surface that is adjacent to the third curved surface, and faces the second curved surface.

A curvature radius of the third curved surface may be the same as that of the fourth curved surface.

A curvature radius of the third curved surface may be different from that of the fourth curved surface.

A curvature radius of the first curved surface may be the same as that of the third curved surface.

A curvature radius of the second curved surface may be the same as that of the fourth curved surface.

An exemplary embodiment of the present inventive concept provides a display device including a display panel including a display area and a peripheral area; and a winder that includes a first portion and a second portion, the first portion having a first curved surface facing a second curved surface of the second portion, wherein the winder is configured to secure a portion of the peripheral area between the first and second curved surfaces.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Exemplary embodiments of the present inventive concept will be described more fully hereinafter with reference to the accompanying drawings. As those skilled in the art would realize, the described embodiments may be modified in various different ways, and thus, should not be limited to the embodiments set forth herein. Like reference numerals may designate like elements throughout the specification.

In the drawings, the thickness of layers, films, panels, regions, etc., may be exaggerated for clarity. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may also be present.

Hereinafter, a display device according to an exemplary embodiment of the present inventive concept will be described with reference toFIG. 1toFIG. 5.

FIG. 1illustrates a side view of a display device according to an exemplary embodiment of the present inventive concept, andFIG. 2illustrates a perspective view enlarging a display panel and a winder ofFIG. 1according to an exemplary embodiment of the present inventive concept.FIG. 3illustrates an exploded view of the display panel and the winder ofFIG. 1according to an exemplary embodiment of the present inventive concept,FIG. 4illustrates a side view enlarging the display panel and the winder ofFIG. 1according to an exemplary embodiment of the present inventive concept, andFIG. 5illustrates a schematic view of the display panel ofFIG. 4according to an exemplary embodiment of the present inventive concept.

Referring toFIG. 1toFIG. 4, a display device of the present exemplary embodiment may include a display panel100, a first winder300, and a second winder500. In the present exemplary embodiment, opposite end portions of the display panel100may be respectively fixed to the insides of the first winder300and the second winder500. For example, a first end portion of the display panel100may be connected to the first winder300and a second end portion of the display panel100may be connected to the second winder500. In this case, in the first winder300and the second winder500, by respectively forming external circumferential surfaces of a first fixing portion310and a second fixing portion330to have a curved surface shape, the display panel100interposed between the first fixing portion310and the second fixing portion330may be fixed in a curved surface shape. As shown inFIGS. 1-4, the external circumferential surfaces of the first and second fixing portions310and330face each other.

The display panel100may display an image by emitting light. For example, the display panel100may be a display panel used in a liquid crystal display (LCD), a plasma display panel (PDP), a field effect display (FED), an electrophoretic display, or the like. In addition, the display panel100may be a display panel of an organic light emitting device (OLED).

The display panel100may be divided into a display area DA and a peripheral area PA. An image may be displayed in the display area DA. In addition, a plurality of pixels may be disposed in the display area DA.

The peripheral area PA corresponds to an area excluding the display area DA. A driving signal line, and a driver, etc. for driving the display area DA may be disposed in the peripheral area PA. In the present exemplary embodiment, the peripheral area PA of the display panel100may be inserted in and fixed to the first winder300and the second winder500.

For example, when the peripheral area PA is fixed to the first winder300and the second winder500, and when the first winder300and/or the second winder500are/is rotated, some of the display area DA as well as the peripheral area PA may be wound on the first winder300and/or the second winder500.

In the present exemplary embodiment, the peripheral area PA may be disposed at opposite sides of the display area DA. However, the present inventive concept is not limited thereto, and the peripheral area PA may be disposed only at one side of the display area DA. When the peripheral area PA is disposed only at one side of the display area DA, only the first winder300may be combined with the display panel100. Since the second winder500applied to the present exemplary embodiment has a structure that is symmetrical with the first winder300, a detailed description of the second winder500will be omitted.

Referring toFIG. 3andFIG. 4, the first winder300may be combined with the peripheral area PA of the display panel100. For example, the peripheral area PA of the display panel100may be inserted in and fixed to the first winder300.

In the present exemplary embodiment, the first winder300may include the first fixing portion310and the second fixing portion330. In this case, the first winder300may be a cylindrical member that has a cross-section of a third curvature radius R3. The first fixing portion310and the second fixing portion330may respectively correspond to portions of a cylindrical-shaped member that are cut and divided along a length direction of the first winder300.

The first fixing portion310may include a first external circumferential surface350. In this case, the first external circumferential surface350corresponds to a surface facing the second fixing portion330, and it may have a curved surface shape.

For example, the first external circumferential surface350may include a first curved surface351and a second curved surface353that are adjacent to each other.

The first curved surface351may have a convexly curved shape protruded toward the second fixing portion330. In this case, the first curved surface351may be curved with a first curvature radius R1. Herein, a cross-section of the first curved surface351cut in a direction perpendicular to a rotation axis of the first winder300may have a semi-circular shape with the first curvature radius R1.

The second curved surface353is adjacent to the first curved surface351, and it may have a concavely curved shape protruded toward the first fixing portion310away from the second fixing portion330. In this case, the second curved surface353may be curved with a second curvature radius R2. Herein, a cross-section of the second curved surface353cut in a direction perpendicular to a rotation axis of the first winder300may have a semi-circular shape with the second curvature radius R2.

As such, the first curved surface351and the second curved surface353adjacent to each other are respectively formed to have a convex shape and a concave shape. Thus, the cross-section of the first external circumferential surface350cut in the direction perpendicular to the rotation axis of the first winder300may be similar to a sinusoidal wave shape.

The second fixing portion330facing the first fixing portion310may include a second external circumferential surface370. The first external circumferential surface350of the first fixing portion310and the second external circumferential surface370of the second fixing portion330may face each other. In this case, the second external circumferential surface370may have a curved surface corresponding to the first external circumferential surface350.

For example, the second external circumferential surface370may include a third curved surface371and a fourth curved surface373that are adjacent to each other.

The third curved surface371may be a curved surface that faces the first curved surface351of the first fixing portion310and corresponds to the first curved surface351. For example, the third curved surface371may be formed with a shape opposite to that of the first curved surface351. In other words, the third curved surface371may have a concavely curved shape protruded toward the second fixing portion330away from the first fixing portion310. In this case, the third curved surface371may be curved with the first curvature radius R1like the first curved surface351. Similar to the first curved surface351, a cross-section of the third curved surface371cut in a direction perpendicular to the rotation axis of the first winder300may have a semi-circular shape with the first curvature radius R1.

The fourth curved surface373may be a curved surface that is adjacent to the third curved surface371and corresponds to the second curved surface353. For example, the fourth curved surface373may be formed with a shape opposite to that of the second curved surface353. In other words, the fourth curved surface373may have a convexly curved shape protruded toward the first fixing portion310away from the second fixing portion330. In this case, the fourth curved surface373may be curved with the second curvature radius R2like the second curved surface353. Similar to the second curved surface353, a cross-section of the fourth curved surface373cut in a direction perpendicular to the rotation axis of the first winder300may have a semi-circular shape with the second curvature radius R2.

In this case, the third curved surface371and the fourth curved surface373adjacent to each other are respectively formed to have a concave shape and a convex shape. Thus, a cross-section of the second external circumferential surface370cut in a direction perpendicular to the rotation axis of the first winder300may be similar to a sinusoidal wave shape and symmetrical to the first external circumferential surface350.

In the present exemplary embodiment, the first curvature radius R1and the second curvature radius R2may be the same. Accordingly, the first curved surface351and the second curved surface353may have the same size curved surface. The first curved surface351and the second curved surface353may also be convexly and concavely disposed in different directions, respectively. In addition, the third curved surface371and the fourth curved surface373may have the same size curved surface. The third curved surface371and the fourth curved surface373may be convexly and concavely disposed in different directions, respectively.

However, the present inventive concept is not limited thereto, and the first curvature radius R1and the second curvature radius R2may be different. For example, the first curvature radius R1may be greater than the second curvature radius R2, or the first curvature radius R1may be less than the second curvature radius R2.

In this case, the first external circumferential surface350of the first fixing portion310and the second external circumferential surface370of the second fixing portion330correspond to each other. In addition, the first external circumferential surface350and the second external circumferential surface370may closely contact each other.

Accordingly, in the present exemplary embodiment, by interposing the peripheral area PA of the display panel100between the first fixing portion310and the second fixing portion330facing each other, the peripheral area PA of the display panel100can be fixed in the first winder300. In other words, by interposing the peripheral area PA of the display panel100between the first external circumferential surface350and the second external circumferential surface370, and then, by bringing the first external circumferential surface350and the second external circumferential surface370to each other such that they contact or almost contact, the peripheral area PA of the display panel100can be tightly fixed in the first winder300.

Referring toFIG. 5, the peripheral area PA of the display panel100may correspond to the first external circumferential surface350(refer toFIG. 3) and the second external circumferential surface370(refer toFIG. 3) of the first winder300(refer toFIG. 3). For example, the peripheral area PA of the display panel100may have not only a convexly curved surface protruded toward the second fixing portion330(refer toFIG. 4) away from the first fixing portion310(refer toFIG. 4) but also a convexly curved surface protruded toward the first fixing portion310(refer toFIG. 4) away from the second fixing portion330(refer toFIG. 4).

As such, since all of the surfaces of the peripheral area PA of the display panel100are convexly curved in different directions, the peripheral area PA can reduce stress in the display panel100of the rollable display device.

Hereinafter, when all of the surfaces of the peripheral area PA of the display panel100are convexly curved in different directions, a process in which stress in the display panel100is reduced will be described with reference toFIG. 6.

FIG. 6consists of schematic views illustrating processes in which respective films are deformed when stacked films are bent.

As shown inFIG. 6(A), it is assumed that the display panel applied to the rollable display device has a structure in which a first substrate Layer1, an adhesive layer PSA, and the second substrate Layer2are stacked. In other words, a first layer is disposed at lower portion of the adhesive layer PSA and a second layer is disposed at a lower portion of the adhesive layer PSA. In this case, it is assumed that each length of the first substrate Layer1, the adhesive layer PSA, and the second substrate Layer2is a length L1. The first substrate Layer1and the second substrate Layer2may be a thin film transistor (TFT) layer, an emission layer, a touch screen panel (TSP) layer, a polarization layer, etc. that are positioned in the display panel.

As shown inFIG. 6(B), when the display panel ofFIG. 6(A)is bent with a predetermined curvature, the first substrate Layer1, the adhesive layer PSA, and the second substrate Layer2may be convexly bent in one direction. In this case, when the display panel is bent with the predetermined curvature, lengths of respective upper and lower surfaces of the first substrate Layer1and the second substrate Layer2excluding the adhesive layer PSA may kept the same. For example, each length of the upper and lower surfaces of the first substrate Layer1may still be identical to the length L1. The length shown inFIG. 6(B)represents an arc length.

The length of the lower surface of the adhesive layer PSA contacting the upper surface of the first substrate Layer1may be the length L1; however, the length of the upper surface of the adhesive layer PSA may be a length L2shorter than the length L1. Unlike the first substrate Layer1and the second substrate Layer2, since the adhesive layer PSA is made of a relatively soft adhesive material, when it is bent, the lengths of the upper and lower surfaces of the adhesive layer PSA may be different. For a closer visual of the differences in the lengths of the upper and lower surfaces of the adhesive layer PSA, refer to the slant in the sides of the adhesive layer PSA inFIG. 6(B).

In addition, the length of the lower surface of the second substrate Layer2positioned on the upper surface of the adhesive layer PSA may be the length L2. In other words, the length of the lower surface of the second substrate Layer2may be the same as the length of the upper surface of the second substrate Layer2.

In other words, when the first substrate Layer1, the adhesive layer PSA, and the second substrate Layer2are convexly bent in one direction, the length L2of the second substrate Layer2may be shorter than the length L1of the first substrate Layer1. Since the adhesive layer PSA is disposed between the first substrate Layer1and the second substrate Layer2, the second substrate Layer2positioned on the adhesive layer PSA may become shorter than the length L1before being bent.

Accordingly, a compressive force is applied to the display panel in the arrow direction shown inFIG. 6(B). In other words, when the sequentially stacked structure is bent, the compressive force may be applied to the display panel due to the adhesive layer PSA. Therefore, a stress is applied to the display panel including the adhesive layer PSA.

However, when the display panel ofFIG. 6(A)in which the first substrate Layer1, the adhesive layer PSA, and the second substrate Layer2are sequentially stacked is bent in different directions, the compressive force applied to the display panel may be offset.

Accordingly, in an exemplary embodiment of the present inventive concept, when the peripheral area PA of the display panel100is provided with the surfaces convexly curved in different directions, it is possible to reduce or disperse stress occurring in the display panel100.

In addition, since the first fixing portion310and the second fixing portion330closely contact each other, the first fixing portion310and the second fixing portion330may be made of a hard material so that the display panel100is not separated therefrom. For example, the first fixing portion310and the second fixing portion330may be respectively made of at least one of stainless steel (SUS), Invar, nickel, cobalt, aluminum, titanium, an alloy thereof, an acryl, and wood.

Referring toFIG. 7toFIG. 10, a fastening portion700that closely and fixedly connects the first fixing portion310and the second fixing portion330may be combined with the first winder300. The fastening portion700closely fixes the first fixing portion310and the second fixing portion330to be able to fix the display panel100interposed therebetween.

In the present exemplary embodiment, referring toFIG. 7andFIG. 8, the fastening portion700may include a bolt710and a nut730. The bolt710may pass through the first fixing portion310and the second fixing portion330. The nut730may be engaged with the bolt710passing through the first fixing portion310and the second fixing portion330. As such, when the bolt710and the nut730are engaged, the first fixing portion310and the second fixing portion330closely and tightly contact each other such that the display panel100may be disposed within and fixed to the first winder300.

In this case, the bolt710and the nut730may be positioned at opposite sides of end portions of the first winder300. In other words, by positioning the bolt710and the nut730at opposite sides of the end portions of the first winder300, the first fixing portion310and the second fixing portion330can be secured to each other. However, the present inventive concept is not limited thereto, and the bolt710and the nut730may be positioned at another portion of the first winder300, for example, a central portion of the first winder300.

FIG. 9andFIG. 10illustrate exemplary variations of the fastening portion700shown inFIG. 7andFIG. 8. For example, the fastening portion700may include a first protrusion751, a second protrusion753, and a cover770.

The first protrusion751is positioned at one end portion of the first fixing portion310, and protrudes in a length direction of the first fixing portion310. The second protrusion753may be positioned at one end portion of the second fixing portion330and protrude in a length direction of the second fixing portion330. In this case, the first protrusion751and the second protrusion753may be adjacent to each other. The second protrusion753is formed to have a shape corresponding to the first protrusion751.

The first protrusion751and the second protrusion753may be fitted into the cover770. External circumferential surfaces of the first protrusion751and the second protrusion753form a single cylindrical shape. Thus, an interior circumferential surface of the cover770may have a cylindrical shape corresponding to the external circumferential surfaces of the first protrusion751and the second protrusion753. In other words, external circumferential surfaces of the first protrusion751and the second protrusion753may be fitted into the interior circumferential surface of the cover770.

An adhesive layer may be interposed between the display panel100and the first fixing portion310and the second fixing portion330so that the display panel100may be tightly fixed between the first fixing portion310and the second fixing portion330. For example, an adhesive layer may be interposed between the display panel100and the first external circumferential surface350of the first fixing portion310, and an adhesive layer may be interposed between the display panel100and the second external circumferential surface370of the second fixing portion330. Further, adhesive layers may be provided at opposite sides of the display panel100.

Hereinafter, a display device according to an exemplary embodiment of the present inventive concept will be described with reference toFIG. 11andFIG. 12. In describing the present exemplary embodiment, a detailed description of the same components as those already described above will be omitted.

FIG. 11illustrates a side view of a display device according to an exemplary embodiment of the present inventive concept, andFIG. 12illustrates a state before a display panel is fixed to a winder ofFIG. 11according to an exemplary embodiment of the present inventive concept.

Referring toFIG. 11andFIG. 12, the display device of the present exemplary embodiment may include the display panel100and a third winder600. In the present exemplary embodiment, a cut-out groove650is formed in the third winder600, and the peripheral area (PA; refer toFIG. 3) of the display panel100may be inserted into and fixed in the cut-out groove650. This is different from the display panel100ofFIG. 3which fixes the peripheral area (PA; refer toFIG. 3) of the display panel100between the first fixing portion310and the second fixing portion330, while the first fixing portion310and the second fixing portion330are separated from each other. For example, in this embodiment the display panel100is fixed in the single cut-out groove650that does not split the third winder600completely apart.

In the present exemplary embodiment, the cut-out groove650of the third winder600may be formed by a third external circumferential surface610and a fourth external circumferential surface630facing each other. In this case, the third external circumferential surface610and the fourth external circumferential surface630may have a curved surface, and the shapes of the third external circumferential surface610and the fourth external circumferential surface630may correspond to each other.

For example, the third external circumferential surface610may include a fifth curved surface611and a sixth curved surface613adjacent to each other.

The fifth curved surface611may have a convexly curved shape protruded toward the fourth external circumferential surface630. In this case, the fifth curved surface611may be curved with a fourth curvature radius R4. Herein, a cross-section of the fifth curved surface611cut in a direction perpendicular to the rotation axis of the third winder600may have a semi-circular shape with the fourth curvature radius R4.

The sixth curved surface613is adjacent to the fifth curved surface611, and it may be formed to have a concavely curved shape protruded toward the third external circumferential surface610away from the fourth external circumferential surface630. In this case, the sixth curved surface613may be curved with a fifth curvature radius R5. Herein, a cross-section of the sixth curved surface613cut in a direction perpendicular to the rotation axis of the third winder600may have a semi-circular shape with the fifth curvature radius R5.

As such, the fifth curved surface611and the sixth curved surface613adjacent to each other respectively have a convex shape and a concave shape. In addition, a cross-section of the third external circumferential surface610cut in a direction perpendicular to the rotation axis of the third winder600may be similar to a sinusoidal wave shape.

The fourth external circumferential surface630may include a seventh curved surface631and an eighth curved surface633adjacent to each other.

The seventh curved surface631may be a curved surface that faces the fifth curved surface611of the third external circumferential surface610and corresponds to the fifth curved surface611. For example, the seventh curved surface631may have a shape opposite to that of the fifth curved surface611. In other words, the seventh curved surface631may be concavely curved toward the fourth external circumferential surface630and protruded away from the third external circumferential surface610. In this case, the seventh curved surface631may be curved with the fourth curvature radius R4like the fifth curved surface611. Similar to the fifth curved surface611, a cross-section of the seventh curved surface631cut in a direction perpendicular to the rotation axis of the third winder600may have a semi-circular shape with the fourth curvature radius R4.

The eighth curved surface633may be a curved surface that is adjacent to the seventh curved surface631and corresponds to the sixth curved surface613. For example, the eighth curved surface633may have a shape opposite to that of the sixth curved surface613. In other words, the eighth curved surface633may have a convexly curved shape protruded toward the third external circumferential surface610and away from the fourth external circumferential surface630. In this case, the eighth curved surface633may be curved with the fifth curvature radius R5like the sixth curved surface613that faces the eighth curved surface633. Similar to the sixth curved surface613, a cross-section of the eighth curved surface633cut in a direction perpendicular to the rotation axis of the third winder600may have a semi-circular shape with the fifth curvature radius R5.

In this case, the seventh curved surface631and the eighth curved surface633adjacent to each other respectively have a concave shape and a convex shape. In addition, a cross-section of the fourth external circumferential surface630cut in a direction perpendicular to the rotation axis of the third winder600may be similar to a sinusoidal wave shape symmetrical to the third external circumferential surface610.

In the present exemplary embodiment, the fourth curvature radius R4and the fifth curvature radius R5may be the same. Accordingly, the fifth curved surface611and the sixth curved surface613may be formed with curved surfaces of the same size, and may be convexly and concavely disposed in different directions, respectively. In addition, the seventh curved surface631and the eighth curved surface633may be formed with curved surfaces of the same size, and may be concavely and convexly disposed in different directions, respectively.

However, the present inventive concept is not limited thereto, and the fourth curvature radius R4and the fifth curvature radius R5may be different. For example, fourth curvature radius R4may be greater than the fifth curvature radius R5, or the fourth curvature radius R4may be less than the fifth curvature radius R5.

In this case, the third external circumferential surface610and the fourth external circumferential surface630correspond to each other. Thus, the third external circumferential surface610and the fourth external circumferential surface630may closely contact each other.

Accordingly, in the present exemplary embodiment, by disposing the peripheral area PA of the display panel100in the cut-out groove650formed by the third external circumferential surface610and the fourth external circumferential surface630, it is possible to fix the peripheral area PA of the display panel100in the third winder600.

According to an exemplary embodiment of the present inventive concept, it is possible to prevent a display panel of a display device from being broken due to stress.