KR20190081335A - Foldable display device and method of manufacturing the same - Google Patents

Abstract

A foldable display device of the present invention comprises: a display panel having a folding area and a non-folding area extending at least one direction from the folding area; a rigid member positioned under the display panel and having an opening pattern corresponding to the folding area; a support member positioned under the rigid member; and a bonding member positioned between the support member and rigid member in correspondence to the non-folding area. The opening pattern includes a sagging suppressing member corresponding to the folding area. The sagging suppressing member has a plurality of blocking units disposed so that one blocking unit and the other blocking unit have gap therebetween.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a display device,

The present invention relates to a foldable display device including a deflection suppressing member.

The image display device which realizes various information on the screen is a core technology of the information communication age and is widely used as a cathode ray tube display panel, a liquid crystal display panel, an electrophoretic display panel, An organic light emitting display panel, and the like.

In particular, organic light emitting display panels for displaying images by controlling the amount of light emitted from organic light emitting elements are being popularized in order to realize thinner, lighter, portable and high-performance image display devices.

Since the organic light emitting display panel is a self light emitting display panel and is implemented without a separate light source device, it can be manufactured in a light and thin form. Further, since the organic light emitting display panel can be manufactured in a thin shape, it is easy to be realized as a foldable display device.

The display panel constituting the display device of the present invention can be folded, including a substrate having flexibility. A display panel with a flexible substrate can be easily folded, but sagging can occur due to the load of the components at the top. Also, components at the top may also be deflected.

Therefore, in order to suppress deflection of the display panel, a component for supporting the substrate can be disposed under the substrate. In this case, a mid frame made of a material having rigidity can be positioned below the display panel to support the display panel. However, since the midframe has a hardness, there is a problem in that when the foldable display device is folded, the display panel is not easily folded. Therefore, a portion of the midframe can be removed so that folding is facilitated in the area where the display panel is folded.

However, folding may be facilitated by removing a portion of the midframe in the area where the display panel is folded, but sagging may occur in the area where the display panel is folded. Also, deflection occurring in the area where the display panel is folded is bent, and the display panel can be visually recognized when the image is implemented.

Accordingly, the inventors of the present invention have recognized the necessity of suppressing the occurrence of deflection in the area where the display panel is folded, with the display panel being easily folded, in order to realize the foldable display device. Therefore, the inventors of the present invention have devised a new structure in which the foldable display device is easily folded and curved is suppressed.

A display panel having a folding area extending in at least one direction from the folding area and the folding area; a display panel located below the display panel, the opening pattern corresponding to the folding area; The opening pattern includes a deflection restraining member corresponding to the rigid member, the supporting member located under the rigid member, the bonding member positioned between the supporting member and the rigid member corresponding to the folding region, and the folding region, Consists of a plurality of blocking portions arranged with a gap between one blocking portion and another adjacent blocking portion.

The plurality of blocking portions extend in contact with the support member in the folding region to implement the deflection suppressing member.

The plurality of shielding portions support a part of the display panel corresponding to the folding area, thereby suppressing deflection of a part of the display panel.

The plurality of blocking portions may be spaced apart from a portion of the supporting member corresponding to the folding region when the display panel is folded.

The folder-type display device further includes a flexibility improving adhesive layer between the display panel and the rigid member.

The flexibility improving adhesive layer has an extending portion for filling the opening region of the opening pattern of the rigid member, and the extending portion extends to contact the supporting member to implement the sag suppressing member.

The extending portion supports a portion of the display panel corresponding to the folding region, thereby suppressing deflection of one portion.

The extending portion, when adhered to the supporting member to fold the display panel, suppresses the flow of the supporting member.

A method of manufacturing a display device according to an embodiment of the present invention includes a display panel having a folding region and a folding region extending in at least one direction from the folding region, Wherein the step of forming the deflection restraining member is a step of extending the specific structure so that the deflection restraining member comes into contact with a part of the supporting member corresponding to the folding area.

The step of extending the specific structure is a step of patterning the shielding portion of the opening pattern of the rigid member located under the display panel so as to protrude from one surface of the rigid member.

Patterning the blocking portion of the opening pattern is implemented through a half-tone shielding mask process.

The step of extending the specific structure is a step of forming an extension of the flexibility improving adhesive layer located under the display panel so as to protrude from the lower surface of the rigid member.

The step of forming the extension of the flexibility improving adhesive layer is formed such that the flexibility improving adhesive layer is adhered to the rigid member such that the extension extends through the opening of the opening pattern of the rigid member.

A foldable display device according to another embodiment of the present invention includes a flexible substrate having a foldable region and a non-foldable region, a flexible substrate having a non-foldable region, An adhesive member having a first adhesive layer and a second adhesive layer adapted to be adhered to the non-collapsible region of the rigid member at the back thereof, a support frame attached to the second adhesive layer at the back side of the adhesive member, And a specific structure that contacts a part of the support member corresponding to the collapsible area.

The specific structure corresponds to a foldable region of the rigid member, and a portion extending to contact the support member is implemented.

The extended portion of the rigid member is implemented through a half-tone shielding mask process.

The adhesive member may further include a flexible adhesive layer positioned between the first adhesive layer and the rigid member and the specific structure may be formed so as to penetrate the portion corresponding to the collapsible region of the rigid member so that the flexible adhesive layer contacts the support member The protruding part is implemented.

The protruding portion of the flexible adhesive layer is realized by a cemented bonding of the flexible adhesive layer and the rigid member through a mold process having a concave pattern.

INDUSTRIAL APPLICABILITY The present invention can minimize the deformation of the folding area of the display panel due to the sag suppression member and minimize the occurrence of bending phenomenon.

The effects according to the embodiments of the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a plan view of a display device according to an embodiment of the present invention.
2 is a cross-sectional view of a display device according to an embodiment of the present invention.
3 is a cross-sectional view of a foldable display device according to another embodiment of the present invention.
4 is a cross-sectional view of a display device according to another embodiment of the present invention.
5A to 5C are cross-sectional views illustrating a method of forming the adhesive member shown in Fig.
6 is a cross-sectional view of a foldable display device according to another embodiment of the present invention.
7 is a cross-sectional view of a foldable display device according to another embodiment of the present invention.
8A to 8D are cross-sectional views illustrating a method of forming the rigid member shown in Fig.
9A to 9C are cross-sectional views illustrating the method of forming the flexibility improving adhesive layer shown in Fig.

Brief Description of the Drawings The advantages and features of the present disclosure, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise. In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions. An element or layer is referred to as being another element or layer "on ", including both intervening layers or other elements directly on or in between. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

Although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

Like reference numerals refer to like elements throughout the specification.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a plan view of a display device according to an embodiment of the present invention. 1, only the display panel 110 is shown among various components of the display device 100 for convenience of explanation.

The display panel 110 is a panel in which an image is implemented. An organic light emitting element for implementing an image, a circuit for driving the organic light emitting element, wiring, and components may be disposed.

The display panel 110 includes a display area AA, a non-display area NA, a folding area FA, and a non-folding area NFA.

The display area AA is an area for displaying an image, and a plurality of pixels including organic light emitting elements are arrayed. In the display area AA, an organic light emitting element for displaying an image and a circuit part for driving the organic light emitting element may be disposed. For convenience of explanation, it is assumed that the present invention is a foldable display device 100 including a display panel 110 having an organic light emitting element, but the present invention is not limited thereto.

The circuit portion may include various thin film transistors, capacitors, wirings, and the like for driving the organic light emitting element. For example, the circuitry may include, but is not limited to, a drive thin film transistor, a switching thin film transistor, a storage capacitor, a gate wire, a data wire, and the like.

The non-display area NA is an area in which no image is displayed, and is a region in which a circuit, wiring, and parts for driving the organic light emitting elements in the display area AA are arranged. Various ICs and driving circuits, such as a gate driver IC and a data driver IC, may be disposed in the non-display area NA. For example, various ICs and driving circuits may be mounted on a non-display area NA of the display panel 110 by a GIP (Gate In Panel) or by a TCP (Tape Carrier Package) or COF (Chip On Film) And may be connected to the display panel 110.

The display panel 110 may also be defined as a display area AA and a non-display area NA, but may be defined as a folding area FA and a non-folding area FA.

The folding area (or the folding part or the folding area) FA is an area where the display panel 110 is folded when the display device 100 is folded, And may include a portion of the area NA. The present invention is described by way of example in which the folding area FA includes a part of the display area AA and a part of the non-display area NA. However, the present invention is not limited to this, There may be a display area NA. Therefore, the folding area FA may include only a part of the display area AA.

The folding area FA can be folded according to a specific radius of curvature with respect to the folding axis (or the folding axis). Specifically, the folding axis may be the X axis. When the folding area FA is folded with respect to the folding axis, the folding area FA may form a part of a curve, a circle or an ellipse. The curvature radius of the folding area FA means a curved line, a circle or a radius of an ellipse corresponding to a curved line, a circle or a part of an ellipse formed by the folding area FA. In the present invention, the folding axis in the X axis direction is located in the folding area FA and the folding area NFA is extended in the Y axis direction from the folding area FA and perpendicular to the folding axis. But is not limited thereto.

The unfolded area (or unfolded area or unfolded area) NFA is an area where the display panel 110 is not folded when the display device 100 is folded. That is, the folding area NFA is an area where the display panel 110 maintains a flat state when the foldable display device 100 is folded. The non-folding area NFA may include a part of the display area AA and a part of the non-display area NA.

The non-folding area NFA may be a region located on both sides of the folding area FA. That is, the non-folding area NFA may be a region extending in the Y-axis direction with respect to the folding axis. At this time, the folding area FA may be defined between the non-folding areas NFA. Therefore, when the display panel 110 is folded with respect to the folding axis, the folding area NFA can face each other.

Hereinafter, the folder-type display apparatus 100 will be described in detail with reference to FIG. 2 for the detailed description.

2 is a cross-sectional view of a display device according to an embodiment of the present invention. 2 is a cross-sectional view taken along line IIa-IIa 'of the present embodiment of the present invention.

2, the display device 100 includes a display panel 110, a first adhesive member 120, a supporting substrate 130, a second adhesive member 140, a rigid member 150, A third adhesive member 160, and a support member 170.

The display panel (or image display member) 110 includes a substrate. The substrate included in the display panel 110 is a flexible substrate that can be made of a plastic material having flexibility and therefore can be foldable. At this time, in a state where a panel manufacturing substrate made of glass is disposed as an example below the substrate, the manufacturing process of the display device 100 is progressed, and the members such as the polarizing plate are disposed on the display panel 110, The substrate can be released.

A supporting substrate 130 is disposed under the display panel 110. The support substrate 130 may be uniformly disposed over the entire area under the display panel 110. [ At this time, the supporting substrate 130 is rigid to support the display panel 110, and is flexible for folding. At this time, the support substrate 130 may be made of a polymer material having excellent flexibility such as polyurethane (PU). The support substrate 130 may have a thickness of 50 mu m or less, but is not limited thereto.

A first adhesive member 120 is positioned between the display panel 110 and the support substrate 130. The first adhesive member 120 may be uniformly disposed on the entire upper surface of the supporting substrate 130 so that the display panel 110 and the supporting substrate 130 can be attached. At this time, the first adhesive member 120 may be made of, for example, a transparent adhesive such as OCR (Optical Clear Resin) or OCA (Optical Clear Adhesive), but is not limited thereto.

The rigid member 150 may be positioned below the support substrate 130. The rigid member 150 is made of a rigid material and is disposed under the display panel 110 to support the display panel 110 and to support the display panel 110 And maintains its shape. At this time, the rigid member 150 has the opening pattern 151 corresponding to the folding area FA of the display panel 110. The opening pattern 151 may mean a structure in which the blocking portion (or blocking region) 151a and the opening portion (or the opening region) 151b are continuously and alternately arranged. Accordingly, the opening pattern 151 of the rigid member 150 can cause the rigid member 150 to be folded at a portion corresponding to the folding area FA of the display panel 110. The rigid member 150 may have a thickness of not less than 0,18 mm and not more than 0.22 mm, but is not limited thereto.

A second adhesive member 140 may be positioned between the support substrate 130 and the rigid member 150. The second adhesive member 140 may be uniformly disposed on the entire lower surface of the support substrate 130 to attach the support substrate 130 and the rigid member 150. The second adhesive member 140 may be made of the same material as the first adhesive member 120, but is not limited thereto.

The support member 170 may be positioned below the rigid member 150. The support member 170 is a member for protecting the upper components from impact. Thus, the support member 170 may be rigid.

The support member 170 may be composed of a first support member 171 and a second support member 172. The boundary between the first supporting member 171 and the second supporting member 172 is positioned corresponding to the folding area FA. Therefore, when the display device 100 is folded, the first support member 171 and the second support member 172 can be spaced apart from the folding area FA.

At this time, as the display device 100 is repeatedly folded, the portion corresponding to the folding area FA of the plurality of components constituting the display device 100 can be continuously pressed. Therefore, the portion of the display device 100 corresponding to the folding area FA may be bent and deformed.

Also, even if the folder-type display device 100 is not folded, the plurality of components constituting the folder-type display device 100 are large in flexibility and thin in thickness. At this time, the rigid member has the opening pattern corresponding to the folding area FA of the display panel 110. Therefore, the portion corresponding to the folding area FA of the display device 100 is weaker than the portion corresponding to the folding area NFA by the rigid member, Deflection may occur.

Accordingly, there is a need for a structure that minimizes the occurrence of flexing and deflection of a portion corresponding to the folding area FA of the display device 100 of the present invention.

A portion of the third adhesive member 160 can be applied as a structure to minimize bending deformation and sagging.

A third adhesive member 160 may be positioned between the support member 170 and the rigid member 150. At this time, the third adhesive member 160 may be positioned corresponding to the non-folding area NFA of the display panel 110 and extend to the area corresponding to the folding area FA. A part of the third adhesive member 160 located in the area corresponding to the folding area FA may be positioned below the opening pattern 151 of the rigid member 150. [

A portion of the third adhesive member 160 located under the opening pattern 151 of the rigid member 150 may have no adhesive force. That is, one portion of the third adhesive member 160 is the non-adhesive portion 161 that is not bonded to the opening pattern 151 of the rigid member 150. That is, the third adhesive member 160 may be a partial adhesive member having a bonding portion and a non-adhesive portion 161.

The non-adhesive portion 161 of the third adhesive member 160 can contact the blocking portion 151a of the opening pattern 151 of the rigid member 150 to support the opening pattern 151. [ At this time, the opening pattern 151 of the rigid member 150 is provided with the opening 151b, so that the blocking portion 151a of the opening pattern 151 can come into contact with a component located above the opening pattern 151. Therefore, Even if the blocking portion 151a of the opening pattern 151 of the rigid member 150 supports the constituent elements on the opening pattern 151, the blocking portion 151a of the opening pattern 151 100 can be folded or a load of the components above the opening pattern 151 can be transferred to the non-adhered portion 161 of the third adhesive member 160. [ The pressure or the load can be dispersed to the support member 170 which is in contact with the non-adhering portion 161 of the third adhesive member 160 corresponding to the folding area FA of the display panel 110. [

That is, the non-adhesive portion 161 of the third adhesive member 160 can suppress bending or deflection of a portion corresponding to the folding area FA of the display panel 110 located on the rigid member 150. Therefore, the deformation in the folding area FA of the display panel 110 can be minimized. Thus, a bent shape is generated in the folding area FA of the display panel 110, thereby minimizing visibility.

The non-adhesive portion 161 of the third adhesive member 160 is not bonded to a portion of the first support member 171 and a portion of the second support member 172 corresponding to the folding region FA. Therefore, when the display panel 110 is folded so that the first support member 171 and the second support member 172 are separated from each other, the non-adhesive portion 161 of the third adhesive member 160 is separated from the first support member 171 And a portion of the second support member 172. In this embodiment, Accordingly, the non-adhered portion 161 of the third adhesive member 160 can minimize the influence on the flexibility of the display device 100. [

3 is a cross-sectional view of a foldable display device according to another embodiment of the present invention.

3 is a cross-sectional view taken along line IIa-IIa 'of the apparatus 200 shown in FIG. 2, wherein the apparatus 200 further includes a flexible adhesive layer 180, The remaining components are the same, so redundant description is omitted.

The flexibility improving adhesive layer 180 is located between the display panel 110 and the rigid member 150. At this time, the flexibility improving adhesive layer 180 may be formed integrally with the rigid member 150 and may be integrally formed. Therefore, the flexibility improving adhesive layer 180 can be positioned between the rigid member 150 and the second adhesive member 140. [

At this time, the flexibility improving adhesive layer 180 may be formed of a flexible material for folding the foldable display device 100 while being resilient to suppress transmission of the impact to the display panel 110. Therefore, the flexibility improving adhesive layer 180 can protect the display panel 110 positioned on the second adhesive member 140. [ For example, the flexibility improving adhesive layer 180 may be made of a material such as silicon (Si), but is not limited thereto.

The flexibility improving adhesive layer 180 may include an extension portion 181. The extension 181 of the flexibility improving adhesive layer 180 may be positioned corresponding to the folding area FA of the display panel 110. [

Specifically, the flexibility improving adhesive layer 180 may be formed integrally with the rigid member 150 and integrally formed therewith. At this time, the extended portion 181 of the flexibility improving adhesive layer 180 may be located corresponding to the opening pattern 151 of the rigid member 150 positioned corresponding to the folding area FA of the display panel 100 have. The extension portion 181 of the flexibility improving adhesive layer 180 may extend into the opening portion 151b of the opening pattern 151. [ The extension 181 of the flexibility improving adhesive layer 180 can fill the opening 151b of the opening pattern 151. [ The opening portion 151a of the opening pattern 151 and the extension portion 181 of the elasticity improving adhesive layer 180 can be alternately and continuously arranged in the opening pattern 151 of the rigid member 150. [

Adhesive portions 161 of the third adhesive member 160 corresponding to the folding area FA of the display panel 110 are positioned under the extended portion 181 of the flexibility improving adhesive layer 180. At this time, the extension 181 of the flexibility improving adhesive layer 180 has an adhesive force. The extended portion 181 of the flexibility improving adhesive layer 180 and the one surface having the blocking portion 151a of the opening pattern 151 can come into contact with the non-adhesive portion 161 of the third adhesive member 160. [ The extending portion 181 of the flexibility improving adhesive layer 180 can be partially adhered to the non-adhesive portion 161 of the third adhesive member 160. [

The upper surface of the non-adhered portion 161 of the third adhesive member 160 is adhered to the extended portion 181 of the flexibility improving adhesive layer 180 so that the third adhesive member 160 is adhered, The flow of the non-adhesive portion 161 of the non-adhesive portion 161 can be suppressed. Therefore, even when the display panel 110 is folded, the components located on the opening pattern 151 of the rigid member 150 corresponding to the folding area FA are not adhered to the non-adhering portion 161 of the third adhesive member 160 . ≪ / RTI >

That is, even when the display panel 100 is folded, the non-adhering portion 161 of the third adhesive member 160 can be positioned at a position corresponding to the folding region FA of the display panel 110 positioned on the rigid member 150 It is possible to suppress flexing or sagging. Therefore, the deformation in the folding area FA of the display panel 110 can be minimized. Accordingly, it is possible to minimize the appearance of a bent shape in the folding area FA of the display panel 110. [

4 is a cross-sectional view of a display device according to another embodiment of the present invention.

4 is different from the cross-sectional view taken along the line IIa-IIa 'of the display device 100 shown in FIG. 2 only in the structure of the third adhesive member 260 provided in the display device 300, The components are the same, so redundant description is omitted.

The third adhesive member 260 may be composed of a first sub-layer 260a and a second sub-layer 260b. The second sub-layer 260b may be located below the first sub-layer 260a. At this time, the non-adhesive portion 261 of the third adhesive member 260 may be provided on a part of the second sub-layer 260b.

The first sub-layer 260a is a layer having an adhesive force on the upper and lower surfaces, and the second sub-layer 260b is a layer having an adhesive force on the upper surface and lower surface other than the non-adhered portion 261. The entire upper surface of the third adhesive member 260 is adhesive, and the lower surface of the third adhesive member 260 is partially adhesive. The upper surface of the third adhesive member 260 can be adhered to one surface of the blocking portion 151a of the opening pattern 151 of the rigid member 150. [ That is, the third adhesive member 260 partially has the non-adhesive portion 261, and can be adhered to the opening pattern 151 of the rigid member 150 without an additional adhesive member.

The upper surface of the third adhesive member 260 is adhered to the opening pattern 151 of the rigid member 150 so that the non-adhered portion 261 on the lower surface of the third adhesive member 260 Can be suppressed. Therefore, even when the display panel 110 is folded, the components positioned on the opening pattern 151 of the rigid member 150 corresponding to the folding area FA are not bonded to the non-adhesive portion 261 of the third adhesive member 260 . ≪ / RTI >

That is, even if the display panel 110 is folded, the non-adhered portion 261 of the third adhesive member 260 can be removed from the portion of the display panel 110 corresponding to the folding area FA of the display panel 110 located on the rigid member 150 It is possible to suppress flexing or sagging. Therefore, the deformation in the folding area FA of the display panel 110 can be minimized. Thus, a bent shape is generated in the folding area FA of the display panel 110, thereby minimizing visibility.

The features of the embodiments shown in Figs. 2 to 4 of this specification may be explained as follows.

The display devices 100, 200, and 300 of the present embodiment include a flexible substrate and an adhesive member.

The flexible substrate may have a folding region FA and a non-folding region NFA. The folding region FA may be a non-foldable region.

The adhesive member may include a first adhesive layer 120 adapted to be attached to the back surface of the flexible substrate and a second adhesive layer 140 disposed on the back surface of the first adhesive layer and adapted to be attached to another support frame 170 160, 260).

The second adhesive layer 160 and the second adhesive layer 160 correspond to the folding region FA of the flexible substrate and are treated so as not to be adhered to each other and the portions 161 and 261 of the foldable region FA, non-foldable region (NFA) and has a specific adhesive force.

The second adhesive layers 160 and 260 may be partially UV-treated with the photosensitive adhesive layer so that the treated portions 161 and 261 may be implemented. By the UV treatment, the portion corresponding to the folding region FA, which is the foldable region of the flexible substrate of the second adhesive layers 160 and 260, is no longer adhered to the non-foldable region (non a specific adhesive force can be maintained at a portion corresponding to the unfolding area NFA. Accordingly, the second contact layers 160 and 260 may have the portions 161 and 261 treated so as not to be adhered to portions corresponding to the folding region FA, which is a foldable region of the flexible substrate. At this time, the adhesive force of the specific adhesive layer of the second adhesive layers 160 and 260 is similar to that of the first adhesive layer 120. Therefore, a portion of the second adhesive layer 160, 260 having a specific adhesive force can be attached to the support frame 170 located on the back surface of the second adhesive layer 160, 260.

The portions 161 and 261 treated so as not to adhere to the second adhesive layers 160 and 260 correspond to the folding regions FA of the flexible substrate, And can support components of the device 100, 200, 300. Therefore, the portions 161 and 261 treated so as not to adhere to the second adhesive layers 160 and 260 are prevented from flexing or sagging of the portion corresponding to the folding region FA, which is a foldable region of the flexible substrate . Accordingly, deformation of the display devices 100, 200, and 300 can be minimized corresponding to the folding area FA, which is a foldable region of the flexible substrate, .

5A to 5C are cross-sectional views illustrating a method of forming the adhesive member shown in Fig. 5A to 5C are cross-sectional views illustrating a method of forming the non-adhesive portion 161 of the third adhesive member 160 included in the display device 100 shown in FIG.

As shown in Fig. 5A, a third adhesive member 160 is formed. The step of forming the third adhesive member 160 may include forming the non-adhesive portion 161 by suppressing the adhesive force of a portion of the third adhesive member 160 corresponding to the folding area FA of the display panel 110 to be.

First, the light shielding mask 1000 is placed on the third adhesive member 160. The light shielding mask 1000 has a transmissive area and a light shielding area. The transmissive region of the light shielding mask 1000 is disposed at a portion of the third adhesive member 160 corresponding to the folding region FA of the display panel 110. [ The light shielding region of the light shielding mask 1000 is disposed at a portion of the third adhesive member 160 corresponding to the non-folding region NFA of the display panel 110. [ The light shielding mask 1000 does not shield a part of the third adhesive member 160 corresponding to the folding area FA of the display panel 110 but does not shield the part of the third adhesive member 160 corresponding to the folding area NFA of the display panel 110 The remaining portion of the third adhesive member 160 may be shielded from light.

After the light-shielding mask 1000 is positioned, a step of modulating the properties of a part of the area of the third adhesive member 160 is performed. Since the transmissive area of the light shielding mask 1000 is located on one portion of the third adhesive member 160 corresponding to the folding area FA of the display panel 110, only a portion of the third adhesive member 160 Properties can change. At this time, the third adhesive member 160 can be partially modulated through a light irradiation process such as, for example, UV irradiation, but is not limited thereto.

The third adhesive member 160 whose properties have changed through the step of partially modifying the third adhesive member 160 has a problem that the adhesiveness of a portion corresponding to the folding area FA of the display panel 110 is reduced Can be. Therefore, the third adhesive member 160 may have a non-adhesive portion corresponding to the folding area FA of the display panel 110. [ At this time, the third adhesive member 160 may be formed of, for example, a photo-sensitive OCA (optical clear adhesive) or a photo-sensitive OCR (optical clear resine), but is not limited thereto.

Accordingly, only the upper surface and the lower surface of the third adhesive member 160 are adhered to the constituent elements corresponding to the non-folding area NFA of the display panel 110, and the portion corresponding to the folding area FA is constituted It may not be bonded to the element.

Also, for example, as shown in Fig. 4, the third adhesive member 260 may be composed of a plurality of layers. The third adhesive member 260 may be composed of a first sub-layer 260a and a second sub-layer 260b. At this time, only one sub-layer of the first sub-layer 260a and the second sub-layer 260b may be modulated in properties. That is, only one sub-layer of the first sub-layer 260a and the second sub-layer 260b can be modulated in properties of a part corresponding to the folding area FA of the display panel 110 through the light irradiation process have. Therefore, only a partial area corresponding to the folding area FA of the display panel 110 of one sub-layer of the first sub-layer 260a and the second sub-layer 260b can be suppressed.

After the non-adhesive portion 161 is formed on the third adhesive member 160, the third adhesive member 160 is positioned below the rigid member 150, as shown in FIG. 5B. At this time, a portion of the upper surface of the third adhesive member 160 corresponding to the non-folding area NFA of the display panel 110 may be adhered to the lower surface of the rigid member 150.

After positioning the third adhesive member 160, the support member 170 is positioned below the third adhesive member 160, as shown in Fig. 5C. At this time, the lower surface of the third adhesive member 160 corresponding to the non-folding area NFA of the display panel 110 may be adhered to the upper surface of the support member 170.

6 is a cross-sectional view of a foldable display device according to another embodiment of the present invention.

6 is a sectional view of the rigid member 250 and the third adhesive member 260 of the foldable display device 400 in comparison with the cross sectional view taken along the line IIa-IIa ' Since only the structure is different and the remaining components are the same, the redundant description is omitted.

A rigid member 250 may be positioned below the support substrate 130. The rigid member 250 is made of a rigid material and is disposed under the display panel 110 to support the display panel 110 and to support the display panel 110 And maintains its shape. At this time, the rigid member 150 has an opening pattern 251 corresponding to the folding area FA of the display panel 110. The opening pattern 251 of the rigid member 250 may mean a structure in which a plurality of blocking portions (or blocking regions) 251a and a plurality of opening portions (or opening regions) 251b are continuously and alternately arranged. Accordingly, the opening pattern 251 of the rigid member 250 can cause the rigid member 250 to be folded at a portion corresponding to the folding area FA of the display panel 110. The rigid member 250 may have a thickness of not less than 0,18 mm and not more than 0.22 mm, but is not limited thereto.

A second adhesive member 140 may be positioned between the support substrate 130 and the rigid member 250. The second adhesive member 140 may be uniformly disposed on the entire lower surface of the support substrate 130 to attach the support substrate 130 and the rigid member 250. The second adhesive member 140 may be made of the same material as the first adhesive member 120, but is not limited thereto.

The support member 170 may be positioned under the rigid member 250. The support member 170 is a member for protecting the upper components from impact. Thus, the support member 170 may be rigid.

The support member 170 may be composed of a first support member 171 and a second support member 172. The boundary between the first supporting member 171 and the second supporting member 172 is positioned corresponding to the folding area FA. Therefore, when the display device 100 is folded, the first support member 171 and the second support member 172 can be spaced apart from the folding area FA.

A third adhesive member 360 may be positioned between the support member 170 and the rigid member 250. At this time, the third adhesive member 360 may be positioned corresponding to the non-folding area NFA of the display panel 110 to attach the support member 170 and the rigid member 250. The third adhesive member 360 may be made of the same material as the second adhesive member 140, but is not limited thereto.

At this time, a plurality of constituent elements constituting the display device 100 have a high flexibility and a small thickness. In addition, the rigid member has an opening pattern corresponding to the folding area FA of the display panel 110. Therefore, the portion corresponding to the folding area FA of the display device 100 is weaker than the portion corresponding to the folding area NFA by the rigid member, Deflection may occur.

Accordingly, there is a need for a member that minimizes occurrence of deflection at a portion corresponding to the folding area FA of the display device 100 of the present invention.

The opening pattern 251 of the rigid member 250 includes a deflection restraining member corresponding to the folding area FA of the display panel 110. [ At this time, the deflection restraining member can be realized by extending a plurality of blocking portions 251a.

Specifically, the opening pattern 251 of the rigid member 250 has a structure in which a plurality of blocking portions 251a and a plurality of opening portions 251b are continuously and alternately arranged. At this time, there may be a gap between one blocking portion 251a of the opening pattern 251 of the rigid member 250 and another blocking portion 251a adjacent thereto. Therefore, the rigid member 250 can be folded corresponding to the folding area FA of the display panel 110. Accordingly, even if the rigid member 250 is positioned below the display panel 110, the display panel 110 can be easily folded in the folding area FA.

At this time, the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 may extend downward. At this time, the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 are extended to the space between the third adhesive members 360 corresponding to the non-folding region NFA of the display panel 110 . The plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 may extend downward and contact the supporting member 170 under the third adhesive member 360. [ That is, the plurality of blocking portions 251a of the opening pattern 251 provided in the rigid member 250 are extended to come in contact with a portion of the supporting member 170 corresponding to the folding area FA of the display panel 110 .

The contact surfaces at which the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 are in contact with the supporting member 170 are formed to be in contact with the surface of the display panel 110 when the display panel 110 is folded. And may be spaced apart from a portion of the support member 170 that corresponds to the folding area FA. Therefore, the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 can minimize the influence on the flexibility of the display device 100 of the present invention.

The contact surfaces of the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 when the display panel 110 is unfolded are supported by the supporting member corresponding to the folding area FA of the display panel 110 170, and can support the opening pattern 251. [0145] At this time, a plurality of blocking portions 251a of the opening pattern 251 provided in the rigid member 250 can contact the components located above the opening pattern 251. Even though the plurality of blocking portions 251a of the opening pattern 251 provided in the rigid member 250 support the components located above the opening pattern 251, The load of the elements can be transmitted to the support member 170 in contact with the plurality of blocking portions 251a. So that the load of the components above the rigid member 250 can be dispersed by the support member 170 under the rigid member 250.

Accordingly, the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 extend in contact with the supporting member 170, and contact with the folding area FA of the display panel 110 Can support the part. At this time, the load of one portion corresponding to the folding area FA of the display panel 110 is greater than the load of the supporting member 170 contacting the plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 Can be delivered in one part. A part of the load corresponding to the folding area FA of the display panel 110 transferred to the support member 170 may be dispersed into the support member 170 under the rigid member 250. [ The plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 can suppress deflection of a part of the folding region FA of the display panel 110 located on the rigid member. Accordingly, since the deformation in the folding area FA of the display panel 110 can be minimized, a bent shape is generated in the folding area FA of the display panel 110 so that visibility can be minimized.

7 is a cross-sectional view of a foldable display device according to another embodiment of the present invention.

7 is a cross-sectional view taken along line IIa-IIa 'of the present embodiment of the present invention. The flexible adhesive layer 280 and the third adhesive member 360 ), And the remaining components are the same, so redundant explanations are omitted.

The flexibility improving adhesive layer 280 is located between the display panel 110 and the rigid member 150. At this time, the flexibility improving adhesive layer 280 may be formed integrally with the rigid member 150 to be integrally formed. Therefore, the flexibility improving adhesive layer 280 can be positioned between the rigid member 150 and the second adhesive member 140. [

At this time, the flexibility improving adhesive layer 280 may be formed of a flexible material for folding the display device 100 while being resilient to suppress transmission of the impact to the display panel 110. Therefore, the flexibility improving adhesive layer 280 can protect the display panel 110 located on the second adhesive member 140. [ For example, the flexibility improving adhesive layer 280 may be made of a material such as silicon (Si), but is not limited thereto.

The third adhesive member 360 may be positioned between the support member 170 and the rigid member 250. At this time, the third adhesive member 360 may be positioned corresponding to the non-folding area NFA of the display panel 110 to attach the support member 170 and the rigid member 250. The third adhesive member 360 may be made of the same material as the second adhesive member 140, but is not limited thereto.

At this time, a plurality of constituent elements constituting the display device 100 have a high flexibility and a small thickness. Further, the rigid member has the opening pattern corresponding to the folding area FA of the display panel. Therefore, the portion corresponding to the folding area FA of the display device 100 is weaker than the portion corresponding to the folding area NFA by the rigid member, Deflection may occur.

Accordingly, there is a need for a member that minimizes occurrence of deflection at a portion corresponding to the folding area FA of the display device 100 of the present invention.

The flexibility improving adhesive layer 280 may include a deflection restraining member corresponding to the folding area FA of the display panel 110. [

Specifically, the flexibility improving adhesive layer 280 may be formed integrally with the rigid member 150 and integrally formed therewith. At this time, the extended portion 281 of the flexibility improving adhesive layer 280 can be positioned corresponding to the opening pattern 251 of the rigid member 250 positioned corresponding to the folding area FA of the display panel 100 have. The extended portion 281 of the flexibility improving adhesive layer 280 may extend into the plurality of openings 251b of the opening pattern 251. [ The extension portion 281 of the flexibility improving adhesive layer 280 can fill the plurality of openings 251b of the opening pattern 251. [ The plurality of blocking portions 251a of the opening pattern 251 of the rigid member 250 and the extending portions 281 of the flexible improving adhesive layer 280 can be alternately and continuously arranged.

The extension 281 of the flexibility enhancing adhesive 280 layer may also extend downward. At this time, the extended portion 281 of the flexible property improving adhesive layer 280 may extend to the space between the third adhesive members 360 corresponding to the non-folded region NFA of the display panel 110. The extension portion 281 of the flexibility improving adhesive layer 280 may extend downward and contact the supporting member 170 located under the third adhesive member 360. [ That is, the extension 281 of the flexibility improving adhesive layer 280 may extend to contact with a part of the supporting member 170 corresponding to the folding area FA of the display panel 110.

The extended portion 281 of the flexibility improving adhesive layer 280 may extend to contact the supporting member 170 to support a portion corresponding to the folding area FA of the display panel 110. [ At this time, a part of the load corresponding to the folding area FA of the display panel 110 may be transferred to a part of the support member 170 which is in contact with the contact surface of the extension part 281 of the flexibility improving adhesive layer 280 have. The load of one portion corresponding to the folding area FA of the display panel 110 transferred to the support member 170 is distributed to the support member 170 at the lower portion of the extension portion 281 of the flexibility improving adhesive layer 280 . Therefore, deflection of a part of the folding area FA of the display panel 110 located on the flexibility improving adhesive layer 280 can be suppressed. Accordingly, since the deformation in the folding area FA of the display panel 110 can be minimized, a bent shape is generated in the folding area FA of the display panel 110 so that visibility can be minimized.

Further, the extension portion 281 of the flexibility improving adhesive layer 280 has an adhesive force. The extended portion 281 of the flexibility improving adhesive layer 280 can be adhered to a portion of the supporting member 170 corresponding to the folding region FA of the display panel 110. [ The extended portion 281 of the flexibility improving adhesive layer 280 can suppress the flow of the supporting member 170 when the display panel 110 is folded, It is possible to firmly support a portion of the folding area FA.

The features of the embodiments shown in Figs. 6 to 7 of this specification may be described as follows.

The foldable display devices 400 and 500 include a flexible substrate, an adhesive member, a rigid member 250, and a support frame 170.

The flexible substrate may have a folding region FA and a non-folding region NFA. The folding region FA may be a non-foldable region.

The adhesive member may include a first adhesive layer 120 adapted to be attached to the back surface of the flexible substrate and a second adhesive layer 360 attachable to the rigid member 250 on the back surface of the first adhesive layer 120 . At this time, the second adhesive layer 360 may be attached to a portion of the rigid member 250 corresponding to the folding area FA, which is a foldable region of the flexible substrate.

The support frame 170 is located on the back surface of the adhesive member and can be attached to the second adhesive layer 360. [ Since the second adhesive layer 360 is located only in the non-foldable region NFA of the flexible substrate, the support frame 170 and the second adhesive layer 360 are formed on the flexible substrate 350. [ (NFA), which is a non-folding region of the non-folding region (NFA).

At this time, the display device 400, 500 may have a specific structure that contacts a part of the support frame 170 corresponding to the folding area FA, which is a folding region of the flexible substrate.

The specific structure may be a portion 251a that corresponds to the folding region FA where the rigid member 250 is a folding region of the flexible substrate and extends to contact the support frame 170. [ The extended portion 251a of the rigid member 250 may then be implemented through a half-tone shielding mask process.

The adhesive member may also include a flexible adhesive layer 280 between the first adhesive layer 120 and the rigid member 250. Wherein the particular structure includes a protruding portion 281 that has the flexible adhesive layer 280 in contact with a portion of the support frame 170 corresponding to a folding region FA that is a foldable region of the flexible substrate, Lt; / RTI > At this time, the flexible adhesive layer 280 can be realized by being attached to the rigid member 250 through a mold process having a concave pattern. The protruding portion 281 of the flexible adhesive layer 280 can be implemented through a portion corresponding to the folding region FA in which the rigid member 250 is a foldable region of the flexible substrate have.

The extended portion 251a of the rigid member 250 or the protruded portion 281 of the flexible adhesive layer 280 can be formed by folding a flexible substrate such that a foldable region of the flexible substrate corresponds to the folded region FA, And can support the components of the display device 400, The extended portion 251a of the rigid member 250 or the protruded portion 281 of the flexible adhesive layer 280 is formed in a portion corresponding to the folding region FA that is the foldable region of the flexible substrate It is possible to suppress flexing or sagging. Accordingly, the deformation of the display devices 400 and 500 can be minimized corresponding to the folding area FA, which is a foldable region of the flexible substrate, so that the bending phenomenon can be minimized. have.

8A to 8D are cross-sectional views illustrating a method of forming the rigid member shown in Fig. 8A to 8D are cross-sectional views illustrating a method of forming the blocking portion 251a of the opening pattern 251 of the rigid member 250 included in the display device 300 shown in FIG.

At this time, the blocking portion 251a of the opening pattern 251 of the rigid member 250 has a specific structure extending in contact with a portion of the supporting member 170 corresponding to the folding region FA of the display panel 110 to be. Accordingly, the rigid member 250 may have a specific structure and serve as a deflection suppressing member. Since the rigid member 250 serving as the deflection restraining member can be formed of the metal layer 1250, a method of forming the rigid member 250 will be described in detail below.

As shown in FIG. 8A, a Half-tone shielding mask is placed on the metal layer 1250.

The metal layer 1250 is formed on the forming substrate 1100 with the material constituting the rigid member 250. At this time, a photosensitive resin (PR) such as a photoresist is coated on the metal layer 1250. A specific region of the grit resin PR can be selectively irradiated with light by the half-tone light shielding mask 2000.

At this time, the half-tone light shielding mask 2000 has a transmission region through which light is transmitted and a light blocking region through which light is not transmitted. The half-tone shielding mask 2000 has a dense portion 2000b in which a transmissive region and a shielding region are densely arranged in a portion where the metal layer 1250 corresponds to the non-folding region NFA of the display panel 110 do. In the half-tone light shielding mask 2000, the transmissive area and the light shielding area are arranged to be relatively wider than the dense part 2000b in the portion where the metal layer 1250 corresponds to the folding area FA of the display panel 110 And an extension portion 2000a. At this time, the extension portion 2000a of the half-tone light shielding mask 2000 is formed such that the metal layer 1250 is patterned to correspond to the portion to be the blocking portion 251a of the opening pattern 251 of the rigid member 250 do. Therefore, in consideration of the width of the blocking portion 251a of the opening pattern 251 of the rigid member 250, the width of the shielding region of the extended portion 2000a is .

After the half-tone light shielding mask 2000 is placed on the metal layer 1250, a light irradiation step is performed on the photosensitive resin PR.

In the light irradiation step, the extension portion 2000a of the half-tone light shielding mask 2000 is located on a part of the metal layer 1250 corresponding to the folding area FA of the display panel 110. [ At this time, the extension portion 2000a of the half-tone light shielding mask 2000 has a wide width of the transmission region and a wide width of the light shielding region. Accordingly, in the light irradiation step, the photosensitive resin PR on one portion of the metal layer 1250 corresponding to the transmission region of the extension portion 2000a of the half-tone light shielding mask 2000 can receive light, The photosensitive resin PR on a part of the corresponding metal layer 1250 can not receive light. The photosensitive resin PR on a portion of the metal layer 1250 corresponding to the transmissive region of the extension portion 2000a of the half-tone light-shielding mask 2000 can be modulated and the metal layer 1250 corresponding to the light- The photosensitive resin PR on one portion of the photosensitive resin PR is not modulated.

In the light irradiation step, the dense portion 2000b of the half-tone light shielding mask 2000 is located on the remaining portion of the metal layer 1250 corresponding to the unfolded region NFA of the display panel 110. [ At this time, the dense portion 2000b of the half-tone light-shielding mask 2000 has a narrow width of the transmissive region and a narrow width of the light shielding region, so that light passing through one transmission region and light passing through the adjacent transmission region can be overlapped . Accordingly, in the light irradiation step, the photosensitive resin PR on the remaining portion of the metal layer 1250 corresponding to the dense portion 2000b can receive light as a whole. Therefore, the photosensitive resin PR on the remaining portion of the metal layer corresponding to the dense portion 2000b of the half-tone light-shielding mask 2000 can be modulated as a whole.

Since the photosensitive resin PR in the lower part of the dense part 2000b of the half-tone light-shielding mask 2000 can be partially shielded by the shielding area of the dense part 2000b, It can be irradiated with light in a smaller amount than the photosensitive resin PR in the lower part. Therefore, the photosensitive resin PR under the dense portion 2000b of the half-tone light-shielding mask 2000 may be partially modulated only in the upper layer of the photosensitive resin PR, (PR). ≪ / RTI >

After the step of irradiating the photosensitive resin (PR), the photosensitive resin (PR) is partially removed as shown in Fig. 8B. At this time, a part of the photosensitive resin (PR) modulated in the light irradiation step may be removed from the photosensitive resin (PR).

The photosensitive resin PR on a part of the metal layer 1250 corresponding to the folding area FA of the display panel 110 is exposed to light of the photosensitivity A part of the resin PR is removed, and a part of the photosensitive resin PR under the light shielding area is not removed. The photosensitive resin PR on the remaining portion of the metal layer 1250 corresponding to the non-folding area NFA of the display panel 110 is partially modulated or less modulated so that the photosensitive resin PR is partially removed, May remain thin on the metal layer 1250.

After the step of partially removing the photosensitive resin PR, the metal layer is etched as shown in Fig. 8C.

A part of the metal layer 1250 corresponding to the folding area FA of the display panel 110, which portion is not left on the photosensitive resin, can be etched and completely removed. A part of the metal layer 1250 corresponding to the folding area FA of the display panel 110 may be removed by etching a part of the photosensitive resin PR, The metal layer under the PR is not removed.

The remaining portion of the metal layer 1250 corresponding to the non-folding region NFA of the display panel 110 remains thin on the upper portion of the metal layer 1250 so that the photosensitive resin PR can be etched and removed. At this time, the remaining portion of the metal layer 1250 under the photosensitive resin PR may be partially etched and removed.

The remaining portion of the metal layer 1250 corresponding to the non-folding region NFA of the display panel 110 is partially etched so that the portion of the metal layer 1250 corresponding to the folding region FA of the display panel 110 May be thinner. The metal layer 1250 corresponding to the folding region FA of the display panel 110 may be formed thicker than the remaining portion of the metal layer 1250 corresponding to the non-folding region NFA.

After the step of etching the metal layer 1250, the remaining photosensitive resin PR is removed as shown in Fig. 8D.

A part of the metal layer 1250 corresponding to the folding area FA of the display panel 110 becomes an opening pattern of the rigid member 250. [ The rigid member 250 formed of the metal layer 1250 may be formed such that one portion corresponding to the folding region FA of the display panel 110 is thicker than the remaining portion corresponding to the non-folding region NFA. The blocking portion of the opening pattern 251 of the rigid member 250 corresponding to the folding area FA of the display panel 110 can be patterned so as to protrude more than one surface of the rigid member 250. [ Accordingly, the rigid member 250 can serve as a deflection preventing member.

9A to 9C are cross-sectional views illustrating the method of forming the flexibility improving adhesive layer shown in Fig. 9A to 9C are cross-sectional views illustrating a method of forming the extension 281 of the flexibility improving adhesive layer 280 of the display device 400 shown in FIG.

The extended portion 281 of the flexible property improving adhesive layer 280 protrudes from the lower surface of the rigid member 250 and extends to a portion of the supporting member 170 corresponding to the folding region FA of the display panel 110 It is a specific structure extended in contact. Therefore, the flexibility improving adhesive layer 280 may have a specific structure and serve as a deflection suppressing member. Since the flexibility improving adhesive layer 280 serving as a deflection restraining member can be formed by being adhered to the rigid member 250, a method of forming the same will be described in detail below.

As shown in FIG. 9A, the rigid member is positioned inside the mold 3000.

The upper surface of the mold (or the mold or frame) 3000 is a concave shape accommodating portion for placing the rigid member therein. The upper surface of the accommodating portion of the mold 3000 is provided with the concave pattern 3001. The opening of the opening pattern 251 of the rigid member 250 is positioned in correspondence with the concave pattern 3001 of the mold 3000.

9B, after the rigid member 250 is placed in the receiving portion of the mold 3000, a fluid material 1280 for forming the flexibility improving adhesive layer 280 is placed on the rigid member 250 Can be applied. At this time, the fluidity material 1280 for forming the flexibility improving adhesive layer 280 may be a material having fluidity and viscosity such as, for example, silicon (Si) or the like, but is not limited thereto. Also, the fluidity material 1280 can be reduced or eliminated through the curing step.

The fluid material 1280 may be applied to cover the upper surface of the rigid member 250. At this time, the fluid material 1280 may pass through the opening of the opening pattern 251 of the rigid member 250. Further, the fluid material 1280 may be filled in the concave pattern 3001 of the mold 3000. The flexibility improving adhesive layer 280 formed of the fluid material 1280 penetrates through the opening of the opening pattern 251 of the rigid member 250 and can be formed to be cemented with the rigid member 250. The flexibility improving adhesive layer 280 may be provided with the extending portion 281 by the fluid material 1280 filled in the concave pattern 3001 of the mold 3000. At this time, the extension part 281 of the flexibility improving adhesive layer 280 may be formed in a shape corresponding to the concave pattern 3001 of the mold 3000. Therefore, the depth of the concave pattern 3001 of the mold 3000 may be equal to or longer than the extension 281 of the flexibility improving adhesive layer 280.

After applying the fluid material 1280, the fluid material is squeezed and cured as shown in FIG. 9C.

The fluid material 1280 can be pressed by pressing the upper surface thereof with the press P. At this time, the spaces that may exist in the concave pattern 3001 of the mold 3000 may be filled with the fluid material 1280 under pressure. Therefore, the spaces that may be present in the concave pattern 3001 of the mold 3000 can be removed. The extended portion 281 of the solubility enhancing adhesive layer 280 formed of the fluid material 1280 may be formed in correspondence with the concave pattern 3001 of the mold 3000.

The fluidity of the compressed fluid material 1280 can be reduced through curing. Accordingly, the fluid material 1280 may be formed of the flexibility improving adhesive layer 280 corresponding to the shape of the recessed pattern located in the receiving portion and the receiving portion of the mold 3000. At this time, the curing process can be performed, for example, by photocuring, thermosetting or chemical curing.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

100, 200, 300, 400, 500: Foldable display device
110: Display panel
120: first adhesive member
130: Support substrate
140: second adhesive member
150, 250: rigid member
160: third adhesive member
161:
170: Support member
180: Flexibility improving adhesive layer
181: Extension part
251: opening pattern
1000: Shade mask
2000: Half-tone shading mask
3000: Mold

Claims (18)

A display panel having a folding region and an folding region extending in at least one direction from the folding region;
A rigid member located below the display panel and having an opening pattern corresponding to the folding region;
A support member positioned below the rigid member;
An adhesive member positioned between the support member and the rigid member corresponding to the unfolded region; And
The opening pattern corresponding to the folding region includes a deflection suppressing member,
Wherein the deflection restraining member is composed of a plurality of blocking portions arranged with a gap between one blocking portion and another adjacent blocking portion. The method according to claim 1,
Wherein the plurality of blocking portions extend in contact with the support member in the folding area to implement the deflection restraining member. 3. The method of claim 2,
Wherein the plurality of blocking portions support a portion of the display panel corresponding to the folding region to suppress deflection of the one portion. The method of claim 3,
Wherein the plurality of blocking portions can be spaced apart from a portion of the support member corresponding to the folding area when the display panel is folded. The method according to claim 1,
Wherein the foldable display device further comprises a flexibility improving adhesive layer between the display panel and the rigid member. 6. The method of claim 5,
Wherein the flexibility improving adhesive layer has an extending portion for filling an opening region of the opening pattern of the rigid member and the extending portion extends in contact with the supporting member to implement the deflection restraining member. The method according to claim 6,
Wherein the extending portion supports a part of the display panel corresponding to the folding region to suppress deflection of the one portion. 8. The method of claim 7,
Wherein the extended portion adheres to the support member to suppress the flow of the support member when the display panel is folded. And a display panel having a folding region and a folding region extending in at least one direction from the folding region, the method comprising: forming a deflection suppressing member,
Wherein the step of forming the deflection restraining member is a step of extending the specific structure so that the deflection restraining member comes into contact with a part of the supporting member corresponding to the folding area. 10. The method of claim 9,
Wherein the step of extending the specific structure is a step of patterning the blocking portion of the opening pattern of the rigid member located under the display panel so as to protrude from one surface of the rigid member. 11. The method of claim 10,
Wherein patterning the blocking portion of the opening pattern is implemented through a half-tone shielding mask process. 10. The method of claim 9,
Wherein the step of extending the specific structure is a step of forming an extension of the flexibility improving adhesive layer located under the display panel so as to protrude from the lower surface of the rigid member. 13. The method of claim 12,
Wherein the step of forming the extension of the flexible adhesive layer is formed by adhering the flexible adhesive layer to the rigid member so that the extension extends through the opening of the opening pattern of the rigid member. A flexible substrate having a foldable region and a non-foldable region;
An adhesive member having a first adhesive layer adapted to be adhered to the back surface of the flexible substrate and a second adhesive layer adapted to be adhered to the rigid member on the backside thereof in correspondence with the non-collapsible area;
A support frame attached to the second adhesive layer at a rear surface of the adhesive member; And
And a specific structure that contacts a part of the support member corresponding to the collapsible area. 15. The method of claim 14,
Wherein the specific structure corresponds to the foldable region of the rigid member, and a portion extending to contact the support member is implemented. 16. The method of claim 15,
Wherein the extended portion of the rigid member is implemented through a half-tone shielding mask process. 15. The method of claim 14,
Wherein the adhesive member further comprises a flexible adhesive layer positioned between the first adhesive layer and the rigid member,
Wherein the specific structure is embodied as a protruding portion penetrating a portion corresponding to the collapsible region of the rigid member so that the flexible bonding layer contacts the supporting member. 18. The method of claim 17,
Wherein the protruding portion of the flexible adhesive layer is realized by cementing the flexible adhesive layer and the rigid member through a mold process having a concave pattern.

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