KR101940104B1 - Flexible display device having slap portion - Google Patents

Abstract

A flexible display device is disclosed. The present invention provides a flexible display device including a flexible display part for displaying an image and a slab part attached to one side of the flexible display part and bent together with the flexible display part and having a curvature, It is easy to carry.

Description

[0001] The present invention relates to a flexible display device having a slap portion,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a flexible display device, and more particularly, to a flexible display device in which a shape of a flexible display part can be maintained and carried easily.

Conventionally, a flat display device is classified into a light emitting type and a light receiving type. Examples of the light emitting display device include an organic light emitting display device (OLED), a plasma display panel (PDP), a flat cathode ray tube (FCRT), a vacuum fluorescent display panel (VFD), a light emitting diode panel (LED), and the like. The light receiving type display device includes a liquid crystal display panel (LCD).

In particular, the organic light emitting display device has a wide viewing angle, an excellent contrast, and a high response speed. Accordingly, the organic light emitting display device can be applied to a display device for a mobile device such as a digital camera, a video camera, a camcorder, a portable information terminal, a smart phone, a slim laptop, a tablet personal computer, or an electronic / Be in the spotlight.

In recent years, a flexible display device has been under research and development as a next-generation display device so that it can be easily carried and applied to devices having various shapes. Among them, a flexible display device based on organic light emitting display technology is considered to be the most promising display device.

On the other hand, the flexible display device tends to require a support device so as to be able to easily view an image in a stretched state, a bent state, and carry it.

The present invention provides a flexible display device in which a slab part is mounted on one surface of a flexible display part in order to maintain the shape of the flexible display part or make it portable.

A flexible display device according to a preferred aspect of the present invention includes:

A flexible display unit for displaying an image; And

And a slab attached to one surface of the flexible display unit and bent together with the flexible display unit and having a curvature.

In one embodiment, the slab portion includes a shape variable portion having a streamlined cross-section from the vertex of the curved portion to both edges, and a housing portion surrounding the shape variable portion.

In one embodiment, the shape-changing portion includes a metal thin plate having flexibility.

In one embodiment, the housing portion is made of an elastic material.

In one embodiment, the shape-changing portion has a streamlined cross-section in a width direction which is a bending direction in an expanded state, and a straight cross-section in a longitudinal direction which is a direction perpendicular to the bending direction, And a streamlined side in the longitudinal direction which is a direction perpendicular to the direction of bending.

In one embodiment, the housing portion has a curvature corresponding to a curvature of the shape variable portion.

In one embodiment, the flexible display portion is affixed with the corresponding curvature on the shape variable portion.

In one embodiment, the shape changing portion includes a solid pattern, a linear pattern, a lattice pattern, a wave pattern, a curved pattern, or a zigzag pattern.

In one embodiment, the housing portion includes a first portion surrounding the shape-changing portion and a second portion made of a space formed at both edges of the first portion.

In one embodiment, the second portion is positioned to correspond to both edges of the flexible display portion in a width direction or a length direction of the flexible display portion.

In one embodiment, the flexible display unit is mounted on the slab unit, and the unmodified portion to which the device having rigidity not overlapping with the slab is mounted is extended to one edge of the flexible display unit.

In one embodiment, a holder portion is provided on one surface of the flexible display portion, and the slab portion is coupled to the holder portion.

In one embodiment, the length of the slab portion is shorter than the length of the flexible display portion.

In one embodiment, the holder portion is attached along both edges of the flexible display portion, and a plurality of guide grooves are formed in which a plurality of slab portions are fitted to each other.

In one embodiment, the flexible display portion includes a protective holder portion formed at the center thereof with an auxiliary guide groove for guiding the slab portion from one edge to the other edge of the flexible display portion.

As described above, according to the flexible display device of the present invention, since the slab portion having the curvature is mounted on the flexible display portion, the touch and readability of the flexible display device is improved, and the portable display device is easy to carry.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a perspective view showing a state in which a flexible display device having a slab portion is opened, according to an embodiment of the present invention;
FIG. 1B is a perspective view of the flexible display device of FIG.
FIG. 2 is a cross-sectional view of one subpixel of the flexible display portion of FIG.
FIG. 3 is a perspective view of the slab portion of FIG. 1,
Fig. 4A is a sectional view showing the incision of the slab portion of Fig. 3 along the line IV-IV in the unfolded state,
FIG. 4B is a sectional view showing the incision of the slab portion of FIG. 3 along the line V-V in the unfolded state,
FIG. 5A is a sectional view of the slab portion of FIG. 3 taken along the line IV-IV in a bent state,
FIG. 5B is a cross-sectional view of the slab portion of FIG. 3 taken along the line V-V in a bent state,
FIG. 6 is a cross-sectional view illustrating a flexible display device according to an embodiment of the present invention,
FIG. 7 is a cross-sectional view of a flexible display device according to another embodiment of the present invention,
8 is a plan view showing a shape-changing portion according to an embodiment of the present invention,
FIGS. 9 to 11 are plan views showing a shape-changing portion according to another embodiment of the present invention,
FIG. 12 is a cross-sectional view of a flexible display device having a slab according to another embodiment of the present invention,
FIG. 13 is a side view of a flexible display device having a slab according to another embodiment of the present invention,
14A is a plan view showing a flexible display device having a holder unit according to an embodiment of the present invention,
Fig. 14B is a side view of Fig. 14A,
FIG. 15A is a plan view showing that the slab portion is mounted on the flexible display device of FIG. 14A,
15B is a side view of Fig. 15A,
Fig. 16 is a cross-sectional view of the flexible display device of Fig.
17 is a plan view showing a flexible display device having a slab portion in a holder portion according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and particular embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, Should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an embodiment of an array substrate for a flexible display device according to the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals designate like or corresponding components, A duplicate description will be omitted.

FIG. 1A is a perspective view showing a state in which the flexible display device 100 according to an embodiment of the present invention is opened, and FIG. 1B is a perspective view showing a state in which the flexible display device 100 in FIG.

Referring to FIGS. 1A and 1B, the flexible display device 100 is provided with a flexible display unit 110 for displaying an image.

The flexible display unit 110 includes at least one thin film transistor (TFT) and an organic light emitting diode (OLED).

The flexible display device 100 may be applied to other display devices such as a liquid crystal display panel, a field emission display device, an electroluminescence display device, and an electrophoretic display device.

The flexible display unit 110 is coupled to a touch screen, a display driver IC (DDI), a flexible printed circuit board (FPCB), a polarizing plate, and a window cover.

A casing 140 for mounting the flexible display unit 110 is installed under the flexible display unit 110. The casing 140 is not limited to any one material having flexibility.

A slab part 150 bent along with the flexible display part 110 is installed under the casing 140. The slab portion 150 is formed to have a curvature. The flexible display unit 110 can be mounted on the slab unit 150, or can be in a bar shape that is in a spread state, or can be wrapped around a wrist or the like to carry or carry an image.

FIG. 2 illustrates one subpixel of the flexible display portion 110 of FIG. 1A.

Referring to FIG. 1, the display unit 110 includes a substrate 111. The substrate 111 is a flexible substrate having flexibility. The flexible substrate 111 is preferably made of a polymer material such as a flexible plastic film, which has a specific gravity smaller than that of a glass substrate and is light, does not break easily, and can be bent.

Though the thickness of the substrate 111 is thin, it is advantageous for realizing a thin film display. However, the thickness of the substrate 111 can be maintained by the substrate 111 when the device and the thin film layer formed on the substrate 111 are maintained by the substrate 111 Of the thickness.

For this, the thickness of the substrate 111 is about 10 to 100 micrometers. When the thickness of the substrate 111 is 10 micrometers or less, it is difficult to stably maintain the shape of the device and the thin film layers formed on the substrate 111 when the substrate 111 is manufactured. When the thickness of the substrate 111 is 100 micrometers or more, it is not easy to maintain the flexible characteristics of the substrate 111.

The substrate 111 may be formed of a material such as polyimide (PI), polycarbonate (PC), polyethersulphone (PES), polyethylene terephthalate (PET), polyethylene naphthalate , PEN), polyarylate (PAR), fiberglass reinforced plastic (FRP), and the like.

A first barrier layer 112 is formed on the substrate 111. The first barrier layer 112 may be formed of an inorganic material such as SiOx, SiNx, SiON, AlO, or AlON, or an organic material such as acrylic or polyimide, or alternatively, an organic material and an inorganic material may be alternately stacked. The first barrier layer 112 functions to block oxygen and moisture and prevents diffusion of moisture and impurities generated from the substrate 111 and controls the transfer rate of heat during crystallization, Can be performed well.

A thin film transistor (TFT) is formed on the first barrier layer 112. Although the thin film transistor of this embodiment is a top gate type thin film transistor, it is needless to say that the thin film transistor of another structure such as a bottom gate type may be provided.

A semiconductor active layer 113 is formed on the first barrier layer 112. When the semiconductor active layer 113 is formed of polysilicon, amorphous silicon is formed and crystallized into polysilicon.

Examples of the amorphous silicon crystallization method include RTA (Rapid Thermal Annealing), SPC (Solid Phase Crystallization), ELA (Eximer Laser Annealing), MIC (Metal Induced Crystallization), MILC (Metal Induced Lateral Crystallization) Sequential Lateral Solidification) method. However, in order to apply the substrate 111 according to the present invention, it is preferable to use a method that does not require a high-temperature heating process.

For example, during the crystallization by the low temperature poly-silicon (LTPS) process, the activation of the semiconductor active layer 113 is performed by irradiating the laser for a short time so that the substrate 111 is exposed to a high temperature The entire process can be carried out at 300 ° C or less. Accordingly, a thin film transistor can be formed by applying a flexible substrate 111 to which a polymer material is applied.

A source region 114 and a drain region 115 are formed in the semiconductor active layer 113 by doping with N-type or P-type impurity ions. The region between the source region 114 and the drain region 115 is a channel region 116 in which no impurity is doped.

A gate insulating layer 117 is deposited on the semiconductor active layer 113. The gate insulation film 117 is formed of a single layer or, SiO ₂ and the SiN _x layer structure as the SiO _2.

A gate electrode 118 is formed on a predetermined region of the gate insulating film 117. The gate electrode 118 is connected to a gate line (not shown) for applying a thin film transistor ON / OFF signal. The gate electrode 118 may be formed of a single or multiple metals and may be formed of a multi-layered film of Mo, MoW, Cr, Al, Mg, Ni, W, Au, .

An interlayer insulating layer 119 is formed on the gate electrode 118. The source electrode 121 is electrically connected to the source region 114 through the contact hole 120. The source region 114 is electrically connected to the drain region 115, The drain electrode 122 is electrically connected to the drain electrode 122.

The interlayer insulating layer 119 may be formed of an insulating material such as SiO ₂ or SiN _x , or may be formed of an insulating organic material or the like. The contact hole 120 may be formed by selectively removing a part of the gate insulating film 117 and a part of the interlayer insulating film 119.

A passivation film (a passivation film and / or a planarization film) 123 is formed on the source electrode 121 and the drain electrode 122. The protective film 123 protects and flattens the underlying thin film transistor. The protective layer 123 may be formed in various shapes such as organic materials such as BCB (benzocyclobutene) and acrylic, and inorganic materials such as SiNx, and may be formed as a single layer, And the like.

A display device is formed on the upper portion of the thin film transistor. Although the organic light emitting device OLED is illustrated in this embodiment, the present invention is not limited thereto, and various display devices are applicable.

A first electrode 125 is electrically connected to one of the source electrode 121 and the drain electrode 122 through a contact hole 124 to form an organic light emitting diode.

The first electrode 125 functions as an anode electrode among the electrodes included in the organic light emitting device, and may be formed of various conductive materials. The first electrode 125 may be a transparent electrode or a reflective electrode depending on the organic light emitting device.

For example, when the first electrode 125 is used as a transparent electrode, ITO, IZO, ZnO, and In ₂ O ₃ may be used. When the first electrode 125 is used as a reflective electrode, Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or a compound thereof, ITO, IZO, ZnO, In ₂ O ₃ or the like can be formed thereon.

A pixel defining layer (PDL) 126 made of an organic material is formed on the protective layer 123 to cover a part of the first electrode 125 of the organic light emitting diode.

An organic layer 127 is formed on a portion of the first electrode 125 exposed to the outside by etching a part of the pixel defining layer 126 on the first electrode 125. A second electrode 128 of the organic light emitting diode is formed on the organic layer 127.

The first electrode 125 and the second electrode 128 are insulated from each other by the organic layer 127 and voltages of different polarities are applied to the organic layer 127, .

In the present embodiment, the organic layer 127 is patterned to correspond to each sub-pixel, that is, the first electrode 125 that is patterned. However, in order to explain the structure of the sub-pixel, And the organic layer 127 may be formed integrally with the organic layer 127 of another adjacent sub-pixel. In addition, various layers such as a part of the organic layer 127 may be formed for each subpixel, and another layer may be integrally formed with the organic layer 127 of the adjacent subpixel.

The organic layer 127 may be a low molecular organic material or a high molecular organic material.

When the organic layer 127 is a low molecular organic material, the organic layer 127 may include a hole injection layer (HIL), a hole transport layer (HTL), an emissive layer (EML) An electron transport layer (ETL), and an electron injection layer (EIL) may be stacked in a single or composite structure.

The organic material that can be used for the organic layer 127 may include at least one selected from the group consisting of copper phthalocyanine (CuPc), N, N-di (naphthalen-1-yl) -N, N'- (Naphthalene-1-yl) -N, N'-diphenyl-benzidine, NPB), tris-8-hydroxyquinoline aluminum (Alq3) and the like. These low molecular weight organic substances can be formed by a method such as vacuum deposition using masks.

When the organic layer 127 uses a polymer organic material, the organic layer 127 may have a structure including a hole transport layer (HTL) and a light emitting layer (EML). At this time, PEDOT is used as the hole transporting layer, and polymer organic materials such as poly-phenylenevinylene (PPV) and polyfluorene are used as the light emitting layer. These polymer organic materials can be formed by a screen printing method, an inkjet printing method or the like.

The organic layer 127 is not limited to the organic layer 127, and various embodiments may be used.

The second electrode 128 may be formed of a transparent electrode or a reflective electrode in the same manner as the first electrode 125.

When the second electrode 128 is used as a transparent electrode, the second electrode 128 may be formed of a metal having a small work function, that is, Li, Ca, LiF / Ca, LiF / An auxiliary electrode formed of a transparent electrode forming material such as ITO, IZO, ZnO, or In ₂ O ₃ can be formed thereon.

When the second electrode 128 is used as a reflection type electrode, the second electrode 128 is formed by over-depositing Li, Ca, LiF / Ca, LiF / Al, Al, Mg and a compound thereof.

Meanwhile, the first electrode 125 may be formed as a transparent electrode or a shape corresponding to an opening shape of each sub-pixel when formed as a reflective electrode. The second electrode 128 may be formed by completely depositing a transparent electrode or a reflective electrode over the entire display area. The second electrode 128 is not necessarily entirely deposited, and may be formed in various patterns. In this case, the first electrode 125 and the second electrode 128 may be stacked in opposite positions.

A sealing substrate 131 is coupled to the organic light emitting device. The sealing substrate 131 is preferably formed of substantially the same material as the flexible substrate 111. The sealing substrate 131 is a film that can be easily bent. Alternatively, the sealing substrate 131 may be formed of an organic material and / or an inorganic film on the organic light emitting device after the organic light emitting device is manufactured, thereby sealing the organic light emitting device.

A second barrier layer 132 may be further formed on one surface of the sealing substrate 131 facing the second electrode 128. The second barrier layer 132 may be formed of an inorganic material such as SiOx, SiNx, SiON, AlO, or AlON, or may be formed of an organic material such as acrylic or polyimide, or alternatively, an organic material and an inorganic material may be alternately laminated.

3 is a perspective view showing the slab portion 150 of FIG. 1 partially cut away.

Referring to FIG. 1, the slab portion 150 includes a shape changing portion 151 and a housing portion 152.

The slab portion 150 has a characteristic that the expanded state and the wound state are maintained in a stable state, respectively. For this, the shape-changing portion 151 is completed by casting using a metallic material in a forming frame having a spiral shape. Thus, the shape variable portion 151 is stably wound in an initial spiral state. In order to spread the shape variable portion 151, a streamlined cross section is required.

More specifically, the shape variable portion 151 has a streamlined cross-section in the width direction which is the direction of bending. In the present embodiment, the shape varying portion 151 has a U-shaped cross section, but may have a cross section of another shape such as a wave shape. The shape variable portion 151 is formed of a thin metal plate having flexibility.

The shape changing part 151 may be mounted on one side of the flexible display part 100 (100 in FIG. 1), but it is preferable that the shape changing part 151 is wrapped around the housing part 152 to minimize deformation. The housing part 152 is made of a material having elasticity such as silicone or rubber. Alternatively, an adhesive layer made of a material having elasticity may be formed between the flexible display portion 100 and the shape variable portion 151.

It is possible to minimize the unnecessary deformation of the flexible display device 100 due to the difference in radius of curvature between the shape changing part 151 and the flexible display part 110 because the housing part 152 surrounds the shape changing part 151 .

In addition, when the flexible display device 100 is deformed, the difference in circumference between the inside and the outside of the shape changing portion 151 is canceled by the elasticity of the housing portion 152, and unnecessary warping occurs in the expanded or rolled state I never do that.

The housing part 152 has a curvature corresponding to the shape-changing part 151 having a streamlined cross-section and surrounds the shape-changing part 151. The housing portion 152 maintains the same thickness from the surface of the shape varying portion 151 over the entire area.

Alternatively, the housing part 152 may have a quadrangular outer shape, and the housing part 152 may have a different thickness from the vertex of the curved part of the shape varying part 151 to the edge thereof. But is not limited thereto.

4A is a cross-sectional view taken along the line IV-IV in a state in which the slab portion 150 of FIG. 3 is extended. FIG. 4B is a cross-sectional view of the slab portion 150 along the line V- Fig. 5 is a cross-sectional view showing the incision in an unfolded state.

4A and 4B, when the slab part 150 is in the expanded state, the shape changing part 151 maintains a streamlined cross-section in the width direction, which is the direction of bending. Further, the shape variable portion 151 maintains a linear side surface in the longitudinal direction which is a direction perpendicular to the direction of bending.

The shape variable portion 151 has a predetermined curvature as it goes from the curved portion vertex 153 to both edges 154. The shape variable portion 151 has a U-shaped cross section.

Meanwhile, the housing part 152 has a curvature corresponding to the shape-changing part 151 and covers the shape-changing part 151.

5A is a cross-sectional view taken along the line IV-IV in a state where the slab portion 150 of FIG. 3 is bent. FIG. 5B is a cross-sectional view of the slab portion 150 of FIG. Fig.

As shown in FIGS. 5A and 5B, when the slab portion 150 is bent, the shape changing portion 151 maintains a straight cross section in the width direction, which is a direction in which the shape changing portion 151 is bent. In addition, the shape variable portion 151 maintains a streamlined side surface in the longitudinal direction which is a direction perpendicular to the direction of bending.

As described above, the slab portion 150 has a streamlined cross-section so as to form a curved portion vertex 153 at the central portion in the downward direction of FIG. 4A in the width direction which is the bent direction in the expanded state, .

At this time, the slab portion 150 maintains a predetermined curvature in the upward direction from the curvature vertex 153 to the both edges 154 in FIG. 4A. When the slab portion 150 is moved in the downward direction It is possible to bend by applying an external force of.

Therefore, the slab portion 150 is stable both in the unfolded state and the warped state.

6 is a cross-sectional view showing the flexible display device 600 according to an embodiment of the present invention cut in a bending direction.

Referring to the drawing, the flexible display device 600 is provided with a flexible display unit 610. A casing 620 is provided below the flexible display unit 610. A slab portion 650 is provided below the casing 620.

The slab portion 650 includes a shape changing portion 651 having a streamlined cross-section in the width direction. The shape variable portion 651 may be installed directly below the casing 620 or may be enclosed by a housing portion 652 having elasticity. Since the flexible display unit 610 has flexibility, it is attached with the corresponding curvature on the shape variable portion 651 having a predetermined curvature.

The flexible display device 600 having the above structure can maintain the strength and the touch and readability of the flexible display part 610 mounted on the shape changing part 651 while maintaining the strength of the shape changing part 651 in the extended state And can be deformed into a shape which is wound along the longitudinal direction when the wrist is carried.

FIG. 7 is a cross-sectional view showing the flexible display device 700 according to another embodiment of the present invention in an incision direction.

Referring to FIG. 5, the flexible display device 700 includes a flexible display unit 710. Unlike the flexible display device 600 of FIG. 6, a slab portion 750 is mounted on a lower portion of the flexible display portion 710 of the present embodiment.

The slab portion 750 includes a shape variable portion 751 having a streamlined cross section in the width direction which is a direction of bending and a housing portion 752 surrounding the shape varying portion 751. A casing 720 is installed below the slab portion 750.

The flexible display device 700 having such a structure can be carried by being wound in a spiral shape when the shape changing portion 751 is bent in the vertical direction (that is, the width direction) in the longitudinal direction.

Also, unlike FIGS. 6 and 7, the flexible display device can control and impart curvature when used in a bar shape by designing the shape of the shape variable portion. That is, in the expanded state, the shape variable portion may be manufactured so as to have a predetermined curvature in the longitudinal direction.

FIGS. 8 to 11 illustrate various shapes of deformable portions according to an embodiment of the present invention.

Hereinafter, although the shape variable portion is attached to one surface of the flexible display portion, for example, the shape variable portion may be enclosed in the housing portion.

Referring to FIG. 8, a shape changing portion 851 is formed on one surface of the flexible display portion 810. The shape changing unit 851 covers the entire area of the flexible display unit 810 and has a solid pattern.

Referring to FIG. 9, a shape changing portion 951 is formed on one surface of the flexible display portion 910. The shape variable portion 951 is arranged to be spaced apart from the flexible display portion 910 in the vertical direction. The shape variable portion 951 has a plurality of separated linear patterns.

Referring to FIG. 10, a shape changing portion 1051 is formed on one surface of the flexible display portion 1010. The shape changing portions 1051 are arranged in the horizontal direction of the flexible display portion 1010. [ The shape changing portion 1051 has a plurality of separated linear patterns.

Referring to FIG. 11, a shape changing portion 1151 is formed on one surface of the flexible display portion 1110. The shape changing part 1151 covers the entire area of the flexible display part 1110 and has a lattice pattern.

As described above, the shape changing portions 851 to 1151 have a solid pattern, a linear pattern, or a lattice pattern, but they can be formed in various patterns such as a wavy pattern, a curved pattern, or a zigzag pattern Do.

FIG. 12 is a cross-sectional view showing a flexible display device 1200 having a slab according to another embodiment of the present invention taken along a width direction thereof.

Referring to the drawing, the flexible display device 1200 is provided with a flexible display unit 1210. A slab 1250 is attached to the lower portion of the flexible display unit 1210. A flexible casing 1220 is provided under the slab portion 1250.

The slab portion 1250 includes a shape changeable portion 1251 having a streamlined cross section in the width direction and a housing portion 1252 surrounding the shape changeable portion 1251.

At this time, when the slab part 125 is attached to one surface of the flexible display part 1210, the flexible display part 1210 is bent so that the flexible display part 1210 has both sides in the width direction of the housing part 1252, The housing portion 1252 forms a portion 1253 which does not surround the shape changing portion 1251. The space portion 1253 is positioned to correspond to both edges of the flexible display portion 1210.

In addition, the housing part 1252 may be formed on both edges of the housing part 1252 in the longitudinal direction thereof to have a space that does not wrap the shape changing part 1251.

Since the slab part 1250 has a space 1253 at both edges in the width direction of the housing part 1252 and at both edges in the longitudinal direction of the housing part 1252, when the flexible display device 1200 is bent The margin can be secured.

FIG. 13 is a side view showing a longitudinal section of a flexible display device 1300 having a slab according to another embodiment of the present invention.

Referring to the drawing, the flexible display device 1300 is provided with a flexible display unit 1310. A slab portion 1350 is attached to a lower portion of the flexible display portion 1310. The slab portion 1350 includes a shape variable portion 1351 and a housing portion 1352 surrounding the shape variable portion 1351.

At this time, a non-deformed portion 1330 is formed at one edge of the flexible display portion 1310. [ The non-deformed portion 1330 includes a component that is not easy to bend, such as a rigid element, and may be separately disposed and arranged so as not to overlap with the bent portion. Accordingly, the flexible display device 1300 is bent in one direction except for the non-deformed portion 1330. [

14A is a plan view showing a flexible display unit 1410 in which a holder unit 1440 according to an embodiment of the present invention is installed, and FIG. 14B is a side view of FIG. 14A.

Referring to FIGS. 14A and 14B, a holder 1440 is provided on the flexible display unit 1410. The holder part 1440 includes a first holder part 1441 and a second holder part 1442 formed at both edges of the flexible display part 1410. A third holder 1443 may be additionally provided between the first holder 1441 and the second holder 1442 to serve as an auxiliary holder.

A first guide groove 1444 and a second guide groove 1445 are formed in the first holder portion 1441 and the second holder portion 1442, respectively. The first guide groove 1444 and the second guide groove 1445 are formed by removing a part of the first holder 1441 and the second holder 1442. The third holder part 1443 is formed with a third guide groove 1446 serving as an auxiliary guide groove. The third guide groove 1446 is formed to pass through the third holder 1443.

On the other hand, a non-deformed portion 1430 is formed at one edge of the flexible display portion 1410.

15A shows a flexible display device 1400 in which a slab part 1450 is mounted on a holder part 1440 shown in FIG. 14A, and FIG. 15B is a side view of FIG. 15A.

Here, the slab portion 1450 may include a shape variable portion, and may further include a housing portion that surrounds the shape variable portion.

15A and 15B, a slab part 1450 is provided on one surface of the flexible display part 1410. [

The slab portion 1450 is formed to have a different length from the flexible display portion 1410 in order to prevent peeling of the slab portion 1450 from the flexible display portion 1410 due to a difference in radius of curvature between the slab portion 1450 and the flexible display portion 1410 have.

In this embodiment, the length of the slab portion 1450 is shorter than the length of the flexible display portion 1410. Accordingly, the slab portion 1450 is inserted into the holder portion 1440 and can compensate for the circumferential difference in the bent state and the expanded state.

That is, one edge of the slab part 1450 is inserted along the first guide groove 1444 of the first holder part 1441. The other edge of the slab portion 1450 is inserted along the second guide groove 1445 of the second holder portion 1442. The third guide groove 1446 is formed in the middle of the slab portion 1450 so that the slab portion 1450 is moved from one edge to the other edge of the flexible display portion 1410 .

16, when the flexible display device 1400 is bent in one direction as shown in FIG. 16, the slab portion 1450 is mounted on the holder portion 1440 with a vertical spacing margin, The difference in circumference is canceled so that it can be wound properly without unnecessary warping.

17 is a plan view showing a flexible display device 1700 in which a slab part 1750 is mounted on a holder part 1740 according to another embodiment of the present invention.

Referring to the drawing, a holder 1740 is provided on the flexible display unit 1710. The holder 1740 includes a first holder 1741 and a second holder 1742 formed at both edges of the flexible display 1410.

The first holder portion 1741 and the second holder portion 1742 of the present embodiment are provided with a plurality of first guide grooves 1745 and a plurality of second A guide groove 1746 is formed.

A third holder 1743 and a fourth holder 1744 may be further disposed between the first holder 1741 and the second holder 1742. A third guide groove 1747 and a fourth guide groove 1748 are formed in the third holder 1743 and the fourth holder 1744, respectively.

A slab 1750 is provided on one side of the flexible display unit 1710. The slab portion 1750 includes a first slab portion 1751 and a second slab portion 1752. The slab portion 1750 has a plurality of slab portions 1751 and 1752 for strength control and other convenience.

The first slab 1741 and the second slab 172 are formed of a first holder 1741, a second holder 1742, a third holder 1743, And inserted through a plurality of guide grooves 1745 to 1748 formed in the guide groove 1744.

100 ... Flexible display device 110 ... Flexible display part
150 ... slap portion 151 ... shape variable portion
152 ... housing part 153 ... bend vertex
154 ... edge 1253 ... space
1330 ... non-

Claims (17)

A flexible display unit for displaying an image; And
And a slab portion attached to one surface of the flexible display portion and bent together with the flexible display portion and having a curvature,
Wherein the slab portion includes a shape variable portion having a streamlined cross-section from a vertex of a curved portion to both edges, and a housing portion surrounding the shape variable portion,
The shape variable portion has a streamlined cross section in the width direction which is the bending direction in the expanded state and a straight side face in the longitudinal direction which is the perpendicular direction to the bending direction and has a straight section in the width direction which is the bending direction in the bending state, Wherein the flexible display device has a streamlined side surface in the longitudinal direction. delete The method according to claim 1,
Wherein the shape changing portion includes a thin metal plate having flexibility. The method according to claim 1,
Wherein the housing portion is made of an elastic material. delete The method according to claim 1,
Wherein the shape changing portion has a streamlined U-shaped cross section. The method according to claim 1,
Wherein the housing portion has a curvature corresponding to a curvature of the shape variable portion. The method according to claim 1,
And the flexible display unit is attached with the corresponding curvature on the shape variable unit. The method according to claim 1,
Wherein the shape changing portion includes a solid pattern, a linear pattern, a lattice pattern, a wave pattern, a curved pattern, or a zigzag pattern. A flexible display unit for displaying an image; And
And a slab portion attached to one surface of the flexible display portion and bent together with the flexible display portion and having a curvature,
Wherein the slab portion includes a shape variable portion having a streamlined cross-section from a vertex of a curved portion to both edges, and a housing portion surrounding the shape variable portion,
Wherein the housing portion includes a first portion surrounding the shape changing portion and a second portion including a space formed at both edges of the first portion. 11. The method of claim 10,
Wherein the second portion is positioned to correspond to both edges of the flexible display portion in a width direction or a length direction of the flexible display portion. The method according to claim 1,
Wherein the flexible display unit is mounted on the slab,
And a non-deformable portion to which an element having rigidity not overlapping with the slab portion is mounted is extended to one edge of the flexible display portion. A flexible display unit for displaying an image; And
And a slab portion attached to one surface of the flexible display portion and bent together with the flexible display portion and having a curvature,
Wherein the slab portion includes a shape variable portion having a streamlined cross-section from a vertex of a curved portion to both edges, and a housing portion surrounding the shape variable portion,
A holder part is provided on one surface of the flexible display part,
And the slab portion is coupled to the holder portion. 14. The method of claim 13,
Wherein a length of the slab portion is shorter than a length of the flexible display portion. 14. The method of claim 13,
Wherein the holder portion is attached along both edges of the flexible display portion, and a plurality of guide grooves are formed to fit a plurality of slab portions. 16. The method of claim 15,
Wherein the flexible display unit includes a protective holder part formed at the center of the flexible display part and having an auxiliary guide groove for guiding the slab part from one edge to the other edge of the flexible display part. 14. The method of claim 13,
Wherein the flexible display unit is disposed on the slab,
And a non-deformable portion to which an element having rigidity not overlapping with the slab portion is mounted is extended to one edge of the flexible display portion.

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