KR20200017336A - Stretchable display device - Google Patents

Abstract

The present invention relates to a stretchable display device. According to an embodiment of the present invention, the stretchable display device comprises: a plurality of island substrates in which a plurality of pixels including a plurality of subpixels are defined, and which are spaced apart from each other; connecting lines which electrically connect pads disposed on neighboring island substrates among the plurality of island substrates; and a lower substrate which defines a plurality of first regions where the plurality of island substrates are disposed, a plurality of second regions where the connecting lines are disposed, and a plurality of third regions where a plurality of additional pixels including a plurality of additional subpixels are defined as regions except for the plurality of first regions and the plurality of second regions. Accordingly, the area of the stretchable display device is efficiently utilized and at the same time, an aperture ratio can be increased.

Description

Stretchable display device {STRETCHABLE DISPLAY DEVICE}

The present invention relates to a stretchable display device, and more particularly, to a stretchable display device in which an aperture ratio is improved and image quality is compensated for even when stretched.

Display devices used in computer monitors, TVs, mobile phones, and the like include organic light emitting displays (OLEDs) that emit light by themselves, and liquid crystal displays (LCDs) that require a separate light source. have.

The display device has been widely applied to not only a monitor and a TV of a computer but also a personal portable device, and research on a display device having a large display area and a reduced volume and weight is being conducted.

In addition, recently, a stretchable display device, which is manufactured to be stretchable in a specific direction and changeable in various shapes by forming a display unit and a wiring on a flexible substrate such as a plastic, which is a flexible material, is the next generation display device. I am attracting attention.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stretchable display device capable of preventing deterioration in image quality of a display device when the display device is stretched by disposing an additional pixel having an uneven shape on a lower substrate.

Another object of the present invention is to provide a stretchable display device which can effectively improve the aperture ratio by disposing additional pixels in a region other than a region in which a plurality of island substrates and connection wirings are disposed on a lower substrate.

Another problem to be solved by the present invention is a stretchable display device that can prevent the crack of the wiring by minimizing the stress concentrated on the wiring when the substrate is stretched by forming a concave-convex shape in the region where the connection wiring is arranged on the lower substrate To provide.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above problems, a stretchable display device according to an exemplary embodiment of the present invention may include a plurality of pixels including a plurality of sub pixels, and a plurality of island substrates and a plurality of island substrates spaced apart from each other. Connecting wirings for electrically connecting pads disposed on neighboring island substrates, a plurality of first regions in which a plurality of island substrates are arranged, a plurality of second regions in which connecting wirings are arranged, and a plurality of first regions and a plurality of The lower substrate may include a lower substrate in which a plurality of third regions are defined except for the third region and in which a plurality of additional pixels including a plurality of additional sub pixels are defined. Accordingly, the aperture ratio may be increased while utilizing the area of the stretchable display device efficiently.

In order to solve the above problems, a stretchable display device according to another exemplary embodiment of the present invention may include a plurality of pixels including a plurality of sub pixels, and a plurality of rigid substrates and a plurality of rigid substrates spaced apart from each other. A lower wiring substrate disposed on the lower substrate, and a connection wiring electrically connecting pads disposed on adjacent rigid substrates among the plurality of rigid substrates, wherein the lower substrate includes a first light emitting region in which the rigid substrate is disposed and a flexible wiring in which the connection wiring is disposed; A plurality of additional pixels may be included in the second emission area, which is the remaining area except for the area. Thus, by arranging the additional pixels in the area that functions as the dummy area in the lower substrate, the area of the light emitting area can be increased by utilizing the limited area efficiently.

Details of other embodiments are included in the detailed description and drawings.

According to the present invention, an additional sub-pixel is disposed in the remaining area of the lower substrate except for the light emitting area and the wiring area, thereby effectively utilizing the area of the stretchable display device and increasing the aperture ratio.

According to the present invention, an additional sub-pixel is formed in a curved shape so as to be stretchable, thereby preventing deterioration in image quality of the stretchable display device.

According to the present invention, by connecting the additional sub-pixels to the circuit unit different from the existing sub-pixels, each sub-pixel is driven independently to increase the resolution.

According to the present invention, an encapsulation layer having flexibility may be disposed on the additional subpixels, thereby protecting the additional subpixels even when the stretchable display device is deformed or stretched.

According to the present invention, by applying a concave-convex structure to a region in which a connection wiring is disposed in the lower substrate, the stress in stretching the substrate may be converted into a bending stress to prevent cracking of the lower substrate and the wiring.

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

1 is an exploded perspective view of a stretchable display device according to an exemplary embodiment.
2 is an enlarged plan view of a stretchable display device according to an exemplary embodiment.
FIG. 3 is a schematic cross-sectional view of one sub-pixel of FIG. 1.
4 is an enlarged plan view of a stretchable display device according to another exemplary embodiment.
FIG. 5 is a schematic cross-sectional view of one subpixel of the stretchable display device of FIG. 4.
6 is an enlarged plan view of a stretchable display device according to still another embodiment of the present invention.
FIG. 7A is a schematic cross-sectional view of the stretchable display of FIG. 6.
FIG. 7B is a schematic cross-sectional view of the stretchable display device of FIG. 7A.
8 is an enlarged plan view of a stretchable display device according to still another embodiment of the present invention.
FIG. 9 is a schematic cross-sectional view of the stretchable display device of FIG. 8.
10 is an enlarged plan view of a stretchable display device according to still another embodiment of the present invention.
FIG. 11 is a schematic cross-sectional view of the stretchable display device of FIG. 10.
12 is a schematic cross-sectional view of a stretchable display device according to still another embodiment of the present invention.
13A is a schematic cross-sectional view of a subpixel of a stretchable display device according to still another embodiment of the present invention.
FIG. 13B is a schematic cross-sectional view illustrating a case where the stretchable display device of FIG. 13A is stretched.
14A is a schematic cross-sectional view of a subpixel of a stretchable display device according to still another embodiment of the present invention.
14B is a schematic cross-sectional view illustrating a case where the stretchable display device of FIG. 14A is stretched.
15 is a schematic cross-sectional view of a subpixel of a stretchable display device according to still another embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the present embodiments make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims.

Shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are exemplary, and thus, the present invention is not limited thereto. In addition, in describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. When 'comprises', 'haves', 'consists of' and the like mentioned in the present specification are used, other parts may be added unless 'only' is used. In the singular form, the plural includes the plural unless specifically stated otherwise.

In interpreting a component, it is interpreted to include an error range even if there is no separate description.

In the case of the description of the positional relationship, for example, if the positional relationship of the two parts is described as 'on', 'upper', 'lower', 'next to', etc. Alternatively, one or more other parts may be located between the two parts unless 'direct' is used.

When an element or layer is referred to as another element or layer, includes all cases in which another element or layer is interposed directly on or in the middle of another element.

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

Like reference numerals refer to like elements throughout.

The size and thickness of each component shown in the drawings are shown for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated configuration.

Each of the features of the various embodiments of the present invention may be combined or combined with each other, partly or wholly, and various interlocking and driving technologies are possible, as will be understood by those skilled in the art, and each of the embodiments may be independently implemented with respect to each other. It may be possible to carry out together in an association.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

< Stretchable  Display device>

The stretchable display device may be referred to as a display device capable of displaying an image even if it is bent or stretched. The stretchable display device may have a high flexibility compared to a conventional display device. Accordingly, the shape of the stretchable display device may be freely changed according to the user's manipulation, such as bending or stretching the stretchable display device. For example, when the user grabs and pulls the end of the stretchable display device, the stretchable display device may be stretched by the user's force. Alternatively, when the user places the stretchable display device on a non-flat wall surface, the stretchable display device may be arranged to be bent along the shape of the surface of the wall surface. In addition, when the force applied by the user is removed, the stretchable display device may return to its original form.

1 is a plan view of a display device according to an exemplary embodiment of the present invention. Referring to FIG. 1, the stretchable display device 100 may include a lower substrate 110, a plurality of island substrates 111, a connection wiring 180, a chip on flim, and a printed circuit board 140. ), An upper substrate 120, and a polarization layer 190. In FIG. 1, an illustration of an adhesive layer for bonding the lower substrate 110 and the upper substrate 120 is omitted for convenience of description.

The lower substrate 110 is a substrate for supporting and protecting various components of the stretchable display device 100. The lower substrate 110 may be formed of an insulating material that may be bent or stretched as a flexible substrate. For example, the lower substrate 110 is made of an elastomer such as silicone rubber such as polydimethylsiloxane (PDMS), polyurethane (PU), and the like, thereby providing flexible properties. Can have. However, the material of the lower substrate 110 is not limited thereto.

The lower substrate 110 is a flexible substrate and may be reversibly expanded and contracted. In addition, the elastic modulus may be several MPa to several hundred MPa, and the elongation failure rate may be 100% or more. The thickness of the lower substrate may be 10 μm to 1 mm, but is not limited thereto.

The lower substrate 110 may have a display area AA and a non-display area NA surrounding the display area AA.

The display area AA is an area where an image is displayed on the stretchable display device 100, and the light emitting device and various driving devices for driving the light emitting device are disposed. The display area AA includes a plurality of pixels including a plurality of sub pixels. The plurality of pixels is disposed in the display area AA and includes a plurality of light emitting elements. Each of the plurality of sub pixels may be connected to various wirings. For example, each of the plurality of sub pixels may be connected to various wirings such as a gate wiring, a data wiring, a high potential power wiring, a low potential power wiring, and a reference voltage wiring.

The non-display area NA is an area adjacent to the display area AA. The non-display area NA is an area surrounding the display area AA adjacent to the display area AA. The non-display area NA is an area where no image is displayed, and wirings, circuits, and the like may be formed. For example, a plurality of pads may be disposed in the non-display area NA, and each pad may be connected to each of the plurality of sub pixels of the display area AA.

A plurality of island substrates 111 are disposed on the lower substrate 110. The plurality of island substrates 111 are rigid substrates and are spaced apart from each other and disposed on the lower substrate 110. The plurality of island substrates 111 may be rigid compared to the lower substrate 110. That is, the lower substrate 110 may have a ductile characteristic than the plurality of island substrates 111, and the plurality of island substrates 111 may have rigidity characteristics than the lower substrate 110.

The plurality of rigid substrates 111, which are a plurality of rigid substrates, may be made of a plastic material having flexibility. For example, polyimide (PI), polyacrylate, and polyacetate (polyacetate) may be used. polyacetate) or the like.

Modulus of the plurality of island substrates 111 may be higher than that of the lower substrate 110. Modulus is an elastic modulus that represents the ratio of deformation to stress with respect to the stress applied to the substrate, the hardness may be relatively high when the modulus is relatively high. Therefore, the plurality of island substrates 111 may be a plurality of rigid substrates having rigidity compared to the lower substrate 110. Modulus of the plurality of island substrate 111 may be more than 1000 times larger than the modulus of the lower substrate 110, but is not limited thereto.

The connection line 180 is disposed between the plurality of island substrates 111. The connection line 180 may be disposed between pads disposed on the plurality of island substrates 111 to electrically connect each pad. A more detailed description of the connection wiring 180 will be described in detail with reference to FIG. 2.

The COF 130 is a film in which various components are disposed on the flexible base film 131, and is a component for supplying a signal to a plurality of sub pixels in the display area AA. The COF 130 may be bonded to a plurality of pads disposed in the non-display area NA, and supplies a power supply voltage, a data voltage, a gate voltage, and the like to each of the plurality of sub pixels of the display area AA through the pad. . The COF 130 may include a base film 131 and a driving IC 132, and various components may be disposed therein.

The base film 131 is a layer that supports the driving IC 132 of the COF 130. The base film 131 may be made of an insulating material, for example, may be made of an insulating material having flexibility.

The driving IC 132 is a component that processes data for displaying an image and a driving signal for processing the same. Although FIG. 1 illustrates that the driving IC 132 is mounted in the COF 130 method, the driving IC 132 is not limited thereto, and the driving IC 132 may be mounted in the form of a chip on glass (COG) or a tape carrier package (TCP). May be

The printed circuit board 140 may be equipped with a control unit such as an IC chip, a circuit unit, and the like. Also, a memory, a processor, and the like may be mounted on the printed circuit board 140. The printed circuit board 140 transfers a signal for driving the light emitting device from the controller to the light emitting device.

The printed circuit board 140 may be connected to the COF 130 to be electrically connected to each of the plurality of sub pixels of the island substrate 111.

The upper substrate 120 overlaps the lower substrate 110 to protect various components of the stretchable display device 100. The upper substrate 120 may be formed of an insulating material that may be bent or stretched as a flexible substrate. For example, the upper substrate 120 may be made of a material having flexibility, and may be made of the same material as the lower substrate 110, but is not limited thereto.

The polarization layer 190 may be configured to suppress reflection of external light of the stretchable display device 100 and overlap the upper substrate 120 to be disposed on the upper substrate 120. However, the present invention is not limited thereto, and the polarization layer 190 may be disposed under the upper substrate 120 or may be omitted depending on the structure of the stretchable display device 100.

Hereinafter, the stretchable display device 100 according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 to 3 together.

Planar and Sectional Structures

2 is an enlarged plan view of a stretchable display device according to an exemplary embodiment. 3 is a schematic cross-sectional view of the sub-pixel of FIG. 1. For convenience of explanation, it will be described with reference to FIG. 1.

2 and 3, a plurality of island substrates 111 are disposed on the lower substrate 110. The plurality of island substrates 111 are spaced apart from each other and disposed on the lower substrate 110. For example, the plurality of island substrates 111 may be disposed in a matrix form on the lower substrate 110 as illustrated in FIGS. 1 and 2, but is not limited thereto.

Referring to FIG. 3, a buffer layer 112 is disposed on a plurality of island substrates 111. The buffer layer 112 may remove various components of the stretchable display device 100 from infiltration of moisture (H ₂ O) and oxygen (O ₂ ) from the outside of the lower substrate 110 and the plurality of island substrates 111. It is formed on the plurality of island substrate 111 to protect. The buffer layer 112 may be made of an insulating material. For example, an inorganic layer made of silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiON), or the like may be formed as a single layer or a plurality of layers. However, the buffer layer 112 may be omitted depending on the structure or characteristics of the stretchable display device 100.

In this case, the buffer layer 112 may be formed only in an area overlapping the plurality of island substrates 111. As described above, since the buffer layer 112 may be formed of an inorganic material, a crack may be easily generated in the process of stretching the stretchable display device 100. Thus, the buffer layer 112 may not be formed in a region between the plurality of island substrates 111, but may be patterned in the shape of the plurality of island substrates 111 to be formed only on the plurality of island substrates 111. Accordingly, the stretchable display device 100 according to an exemplary embodiment may form the buffer layer 112 only in an area overlapping the plurality of island substrates 111, which are rigid substrates, thereby forming the stretchable display device 100. Even in the case of deformation such as bending or stretching, damage to the buffer layer 112 can be prevented.

Referring to FIG. 3, a first transistor 150 including a first gate electrode 151, a first active layer 152, a first source electrode 153, and a first drain electrode 154 on the buffer layer 112. ) Is formed. For example, a first active layer 152 is formed on the buffer layer 112, and a gate for insulating the first active layer 152 and the first gate electrode 151 on the first active layer 152. The insulating layer 113 is formed. An interlayer insulating layer 114 is formed to insulate the first gate electrode 151, the first source electrode 153, and the first drain electrode 154, and the first active layer may be formed on the interlayer insulating layer 114. The first source electrode 153 and the first drain electrode 154 are formed to be in contact with each other 152.

The gate insulating layer 113 and the interlayer insulating layer 114 may be patterned and formed only in a region overlapping the plurality of island substrates 111. Since the gate insulating layer 113 and the interlayer insulating layer 114 may also be made of the same inorganic material as the buffer layer 112, cracks may be easily generated during the stretching of the stretchable display device 100. . Thus, the gate insulating layer 113 and the interlayer insulating layer 114 are not formed in the region between the plurality of island substrates 111, but are patterned in the shape of the plurality of island substrates 111 to form the plurality of island substrates 111. It can only be formed on top.

3 illustrates only a driving transistor among various transistors that may be included in the stretchable display device 100, but a switching transistor or a capacitor may also be included in the display device. In addition, although the first transistor 150 has been described as having a coplanar structure, various transistors such as a staggered structure may be used.

Referring to FIG. 3, a gate pad 171 is disposed on the gate insulating layer 113. The gate pad 171 is a pad for transferring a gate signal to the plurality of sub pixels SPX. The gate pad 171 may be made of the same material as the first gate electrode 151, but is not limited thereto.

Referring to FIG. 3, the planarization layer 115 is formed on the first transistor 150 and the interlayer insulating layer 114. The planarization layer 115 planarizes the upper portion of the first transistor 150. The planarization layer 115 may be composed of a single layer or a plurality of layers, and may be formed of an organic material. For example, the planarization layer 115 may be made of an acryl-based organic material, but is not limited thereto. The planarization layer 115 may include a contact hole for electrically connecting the first transistor 150 and the anode 161, a contact hole and a connection pad for electrically connecting the data pad 173 and the first source electrode 153. It may include a contact hole for electrically connecting the 172 and the gate pad 171.

In some embodiments, a passivation layer may be formed between the first transistor 150 and the planarization layer 115. That is, a passivation layer covering the first transistor 150 may be formed to protect the first transistor 150 from penetration of moisture, oxygen, or the like. The passivation layer may be made of an inorganic material, but may be made of a single layer or a multilayer, but is not limited thereto.

Referring to FIG. 3, a data pad 173, a connection pad 172, and an organic light emitting element 160 are disposed on the planarization layer 115.

The data pad 173 may transfer a data signal to the plurality of sub pixels SPX from the connection line 180 serving as the data line. The data pad 173 is connected to the first source electrode 153 of the first transistor 150 through a contact hole formed in the planarization layer 115. The data pad 173 may be made of the same material as the anode 161 of the organic light emitting device 160, but is not limited thereto. In addition, the data pad 173 is formed on the interlayer insulating layer 114, not on the planarization layer 115, so that the data pad 173 is the same as the first source electrode 153 and the first drain electrode 154 of the first transistor 150. It may be formed of a material.

The connection pad 172 may transfer a gate signal to the plurality of sub pixels SPX from the connection line 180 serving as the gate line. The connection pad 172 is connected to the gate pad 171 through contact holes formed in the planarization layer 115 and the interlayer insulating layer 114, and transmits a gate signal to the gate pad 171. The connection pad 172 may be made of the same material as the data pad 173, but is not limited thereto.

The organic light emitting element 160 is disposed to correspond to each of the plurality of sub-pixels SPX, and is an element that emits light having a specific wavelength band. That is, the organic light emitting device 160 may be a blue organic light emitting device for emitting blue light, a red organic light emitting device for emitting red light, a green organic light emitting device for emitting green light, or a white organic light emitting device for emitting white light, but is not limited thereto. It doesn't happen. When the organic light emitting diode 160 is a white organic light emitting diode, the stretchable display device 100 may further include a color filter.

The organic light emitting device 160 includes an anode 161, an organic light emitting layer 162, and a cathode 163. Specifically, the anode 161 is disposed on the planarization layer 115. The anode 161 is an electrode configured to supply holes to the organic light emitting layer 162. The anode 161 may be made of a transparent conductive material having a high work function. The transparent conductive material may include indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO). The anode 161 may be made of the same material as the data pad 173 and the gate pad 171 disposed on the planarization layer 115, but is not limited thereto. In addition, when the stretchable display device 100 is implemented in a top emission method, the anode 161 may further include a reflector.

The anode 161 is spaced apart from each other by the sub-pixel SPX and electrically connected to the first transistor 150 through the contact hole of the planarization layer 115. For example, although the anode 161 is illustrated as being electrically connected to the first drain electrode 154 of the first transistor 150 in FIG. 2, the anode 161 may be electrically connected to the first source electrode 153.

The bank 116 is formed on the anode 161, the data pad 173, the connection pad 172, and the planarization layer 115. The bank 116 is a component that distinguishes adjacent sub-pixels SPX. The bank 116 is disposed to cover at least a portion of both sides of the adjacent anode 161 to expose a portion of the top surface of the anode 161. The bank 116 emits light in the lateral direction of the anode 161 due to the concentration of current at the edges of the anode 161, thereby preventing the unintended sub-pixel SPX from emitting or mixing. It can also be done. The bank 116 may be made of acryl resin, benzocyclobutene (BCB) resin, or polyimide, but is not limited thereto.

The bank 116 may include a connection hole 180 that serves as a data wire and a contact hole that connects the data pad 173, and a contact hole that connects the connection wire 180, which functions as a gate wire, and the connection pad 172. do.

The organic emission layer 162 is disposed on the anode 161. The organic light emitting layer 162 is configured to emit light. The organic light emitting layer 162 may include a light emitting material, and the light emitting material may include a phosphorescent material or a fluorescent material, but is not limited thereto.

The organic light emitting layer 162 may be composed of one light emitting layer. Alternatively, the organic light emitting layer 162 may have a stack structure in which a plurality of light emitting layers stacked with the charge generation layer interposed therebetween. The organic emission layer 162 may further include at least one organic layer among a hole transport layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole injection layer, and an electron injection layer.

2 and 3, the cathode 163 is disposed on the organic light emitting layer 162. The cathode 163 supplies electrons to the organic emission layer 162. The cathode 163 is made of indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc oxide (zinc oxide), and tin. It may be made of an oxide (Tin Oxide, TO) -based transparent conductive oxide or ytterbium (Yb) alloy. Alternatively, the cathode 163 may be made of a metal material.

The cathode 163 may be patterned to overlap each of the plurality of island substrates 111. That is, the cathode 163 may be formed only in an area overlapping the plurality of island substrates 111, and may not be formed in an area between the plurality of island substrates 111. Since the cathode 163 is made of a material such as a transparent conductive oxide, a metal material, and the like, when the cathode 163 is also formed in a region between the island substrates 111, the stretchable display device 100 may be stretched or stretched. Cathode 163 may be damaged. Accordingly, the cathode 163 may be formed to correspond to each of the plurality of island substrates 111 on a plane. 2 and 3, the cathode 163 may be formed to have an area that does not overlap an area where the connection line 180 is disposed in an area overlapping the plurality of island substrates 111.

Unlike the general organic light emitting diode display, in the stretchable display 100 according to the exemplary embodiment, the cathode 163 is patterned to correspond to the plurality of island substrates 111. Therefore, each of the cathodes 163 disposed on the island substrates 111 may be independently supplied with low potential power through the connection line 180.

2 and 3, an encapsulation layer 117 is disposed on the organic light emitting element 160. The encapsulation layer 117 may cover the organic light emitting device 160 and contact the portion of the upper surface of the bank 116 to seal the organic light emitting device 160. Thus, the encapsulation layer 117 protects the organic light emitting device 160 from moisture, air, or physical impact that can penetrate from the outside.

The encapsulation layer 117 covers each of the cathodes 163 patterned to overlap each of the plurality of island substrates 111, and may be formed for each of the plurality of island substrates 111. That is, the encapsulation layer 117 is disposed to cover one cathode 163 disposed on one island substrate 111, and the encapsulation layer 117 disposed on each of the island substrates 111 may be spaced apart from each other. Can be.

The encapsulation layer 117 may be formed only in an area overlapping the plurality of island substrates 111. As described above, since the encapsulation layer 117 may be configured to include an inorganic layer, cracks may be easily damaged during the stretching of the stretchable display device 100. In particular, since the organic light emitting device 160 is vulnerable to moisture or oxygen, when the encapsulation layer 117 is damaged, the reliability of the organic light emitting device 160 may be reduced. Accordingly, in the stretchable display device 100 according to an exemplary embodiment, the encapsulation layer 117 is not formed in an area between the island substrates 111, so that the stretchable display device 100 is formed. In the case of deformation such as bending or stretching, damage of the encapsulation layer 117 can be minimized.

When the stretchable display device 100 according to an exemplary embodiment of the present invention is compared with a conventional flexible organic light emitting display device, the stretchable display device 100 may include a plurality of island substrates 111 having relatively rigidity. The structure is spaced apart from each other and disposed on the lower substrate 110 having a relatively softness. In addition, the cathode 163 and the encapsulation layer 117 of the stretchable display device 100 are patterned to correspond to each of the island substrates 111. That is, in the stretchable display device 100 according to an exemplary embodiment, the stretchable display device 100 may be more easily deformed when the user stretches or deflects the stretchable display device 100. The structure may have a structure that minimizes damage to the components of the stretchable display device 100 while the stretchable display device 100 is deformed.

<Base Polymer and  Connection Wiring Composed of Conductive Particles>

The connection wire 180 refers to a wire for electrically connecting pads on the plurality of island substrates 111. The connection wire 180 includes a first connection wire 181 and a second connection wire 182. The first connection wire 181 refers to a wire extending in the X-axis direction among the connection wires 180, and the second connection wire 182 refers to a wire extending in the Y-axis direction among the connection wires 180.

In a typical organic light emitting diode display, various wirings such as a plurality of gate wires and a plurality of data wires are extended between a plurality of sub pixels, and a plurality of sub pixels are connected to one signal wire. Thus, in a typical organic light emitting diode display, various wirings such as a gate wiring, a data wiring, a high potential power wiring, a reference voltage wiring, and the like extend from one side to the other side of the organic light emitting display without interruption.

In contrast, in the stretchable display device 100 according to an exemplary embodiment, various wirings, such as a gate wiring, a data wiring, a high potential power wiring, a reference voltage wiring, etc., which are made of a metal material, may include a plurality of island substrates ( 111) only. That is, in the stretchable display device 100 according to an exemplary embodiment, various wirings made of a metal material may be disposed only on the plurality of island substrates 111 and may not be formed to contact the lower substrate 110. have. Accordingly, the various wires may be patterned to discontinuously correspond to the plurality of island substrates 111.

In the display device 100 according to an exemplary embodiment, pads on two island substrates 111 adjacent to each other may be connected by the connection wires 180 to connect the discontinuous lines. That is, the connection line 180 electrically connects pads on two adjacent island substrates 111. Therefore, the stretchable display device 100 according to the present invention may connect a plurality of wirings such as gate wirings, data wirings, high potential power wirings, and reference voltage wirings to electrically connect the plurality of wirings between the plurality of island substrates 111. 180 may be included. For example, gate lines may be disposed on a plurality of island substrates 111 disposed adjacent to each other in the X-axis direction, and gate pads 171 may be disposed at both ends of the gate lines. In this case, each of the plurality of gate pads 171 on the plurality of island substrates 111 arranged adjacent to each other in the X-axis direction may be connected to each other by a connection line 180 serving as a gate line. Accordingly, the gate wires disposed on the island substrates 111 and the connection wires 180 disposed on the lower substrate 110 may function as one gate wire. In addition, all the various wires that may be included in the stretchable display device 100, such as data wires, high potential power wires, and reference voltage wires, may also function as one wire by the connection wires 180 as described above. .

Referring to FIG. 2, the first connection line 181 may connect pads on two island substrates 111 arranged side by side among pads on a plurality of island substrates 111 disposed adjacent to each other in the X-axis direction. The first connection wire 181 may function as a gate wire or a low potential power wire, but is not limited thereto. For example, the first connection wiring 181 may function as a gate wiring, and the gate pads 171 on the two island substrates 111 arranged side by side in the X-axis direction through contact holes formed in the bank 116. Can be electrically connected. Thus, as described above, the gate pads 171 on the plurality of island substrates 111 arranged in the X-axis direction may be connected by the first connection line 181 serving as the gate line, and one gate signal may be Can be delivered.

Referring to FIG. 2, the second connection wires 182 may connect pads on two island substrates 111 arranged side by side among pads on a plurality of island substrates 111 disposed adjacent to each other in the Y-axis direction. The second connection wire 182 may function as a data wire, a high potential power wire, or a reference voltage wire, but is not limited thereto. For example, the second connection wires 182 may function as data wires, and the data pads 173 on two island substrates 111 arranged side by side in the Y-axis direction through contact holes formed in the banks 116. Can be electrically connected. Thus, as described above, the data pads 173 on the plurality of island substrates 111 arranged in the Y-axis direction may be connected by a plurality of second connection wires 182 serving as data wires, and one data Signals can be delivered.

Referring to FIG. 2, the connection line 180 includes a base polymer and conductive particles. In detail, the first connection wire 181 includes the base polymer and the conductive particles, and the second connection wire 182 includes the base polymer and the conductive particles.

The first connection wires 181 may include top and side surfaces of the bank 116 disposed on the island substrate 111, a planarization layer 115, an interlayer insulating layer 114, a buffer layer 112, and a plurality of island substrates 111. In contact with the side of the) may be formed extending to the upper surface of the lower substrate (110). Accordingly, the first connection wire 181 is in contact with the upper surface of the lower substrate 110, in contact with the side of the neighboring island substrate 111, the buffer layer 112 and the gate insulation disposed on the neighboring island substrate 111. The side surfaces of the layer 113, the interlayer insulating layer 114, the planarization layer 115, and the bank 116 may be in contact with each other. The first connection wire 181 may be in contact with the connection pad 172 disposed on the neighboring island substrate 111, but is not limited thereto.

The base polymer of the first connection line 181 may be formed of an insulating material that may be bent or stretched similarly to the lower substrate 110. The base polymer may include, but is not limited to, for example, SBS (Styrene Butadiene Styrene) and the like. Thus, when the stretchable display device 100 is bent or stretched, the base polymer may not be damaged. The base polymer may be formed on the lower substrate 110 and the island substrate 111 by coating a material constituting the base polymer or by using a slit.

The conductive particles of the first connection wiring 181 may be dispersed in the base polymer. In detail, the first connection wire 181 may include conductive particles dispersed at a constant concentration in the base polymer. For example, the first connection wire 181 may uniformly stir the conductive particles to the base polymer, and then coat and cure the base polymer having the conductive particles dispersed thereon on the lower substrate 110 and the island substrate 111. It may be formed in a manner, but is not limited thereto. The conductive particles may include at least one of silver (Ag), gold (Au), and carbon (Carbon), but are not limited thereto.

The conductive particles dispersed in the base polymer of the first connection wire 181 may form a conductive path for electrically connecting the connection pads 172 disposed on the island substrate 111 adjacent to each other. In addition, a conductive path may be formed by electrically connecting the gate pad 171 formed in the island substrate 111 disposed at the outermost of the island substrates 111 and the pad disposed in the non-display area NA.

Referring to FIG. 2, the base polymer of the first connection line 181 and the conductive particles dispersed in the base polymer may connect the pads disposed on the island substrate 111 adjacent to each other in a linear shape. To this end, in the manufacturing process, the base polymer may be formed in a straight line connecting the pads disposed on each of the plurality of island substrates 111. Accordingly, the conductive path formed by the conductive particles dispersed in the base polymer may also be linear. However, the formation process and shape of the base polymer and the conductive particles of the first connection wiring 181 may not be limited thereto.

Referring to FIG. 2, the second connection wires 182 may include the top and side surfaces of the bank 116 disposed on the island substrate 111, the planarization layer 115, the interlayer insulating layer 114, the buffer layer 112, In contact with the side of the plurality of island substrate 111 may be formed to extend to the upper surface of the lower substrate (110). Accordingly, the second connection wire 182 is in contact with the upper surface of the lower substrate 110, in contact with the side of the neighboring island substrate 111, the buffer layer 112 and the data insulation disposed on the neighboring island substrate 111. The side surfaces of the layer 113, the interlayer insulating layer 114, the planarization layer 115, and the bank 116 may be in contact with each other. The second connection wire 182 may be in contact with the data pad 173 disposed on the neighboring island substrate 111, but is not limited thereto.

The base polymer of the second connection line 182 may be formed of an insulating material that may be bent or stretched similarly to the lower substrate 110, and may be made of the same material as the base polymer of the first connection line 181. The base polymer may include, but is not limited to, for example, SBS (Styrene Butadiene Styrene) and the like.

In addition, the conductive particles of the second connection wire 182 may be dispersed in the base polymer. In detail, the second connection wire 183 may include conductive particles dispersed at a constant concentration in the base polymer. In this case, the concentration of the conductive particles dispersed in the upper portion of the base polymer of the second connection wiring 182 and the concentration of the conductive particles dispersed in the lower portion of the base polymer may be substantially the same. In addition, the manufacturing process of the second connecting wiring 181 may be the same as the manufacturing process of the first connecting wiring 181, or may be performed at the same time.

 The conductive particles dispersed in the base polymer of the second connection wiring 182 may form a conductive path for electrically connecting the data pads 173 disposed on the island substrate 111 adjacent to each other. In addition, a conductive path may be formed by electrically connecting the data pad 173 formed in the island substrate 111 disposed at the outermost of the island substrates 111 and the pad disposed in the non-display area NA.

Referring to FIG. 2, the base polymer of the second connection line 182 and the conductive particles dispersed in the base polymer may connect the pads disposed on the island substrate 111 adjacent to each other in a linear shape. To this end, in the manufacturing process, the base polymer may be formed in a straight line connecting the pads disposed on each of the plurality of island substrates 111. Accordingly, the conductive path formed by the conductive particles dispersed in the base polymer may also be linear. However, the formation process and shape of the base polymer and the conductive particles of the second connection wiring 182 may not be limited thereto.

In some embodiments, the conductive particles dispersed in the base polymer of the connection wiring 180 may be dispersedly disposed with a concentration gradient in the base polymer. The concentration of the conductive particles decreases from top to bottom of the base polymer, so that the conductivity by the conductive particles on top of the base polymer may be greatest. Specifically, the conductive particles may be injected and dispersed in the base polymer using an ink printing process using a conductive precursor on the upper surface of the base polymer. As the polymer is swelled several times in the process of injecting the conductive particles into the base polymer, the conductive particles may penetrate into the empty space of the base polymer. Subsequently, when the base polymer into which the conductive particles are injected is immersed in the reducing material or reduced by vapor, the connection wire 180 may be formed. Thus, the penetration region on top of the base polymer may be so high that the concentration of conductive particles forms a conductive pathway. The thickness of the penetration region dispersed at a high concentration in the conductive particles on the base polymer may vary depending on the time and intensity at which the conductive particles are injected from the top surface of the base polymer, for example, the conductive particles are injected from the top surface of the base polymer. If the time or intensity is increased, the thickness of the penetrating area can be thickened. In addition, each of the conductive particles may be in contact with each other on top of the base polymer, a conductive path is formed through the conductive particles in contact with each other to transmit an electrical signal.

In some embodiments, the base polymer of the connection line 180 may be formed as a single layer on the lower substrate 110 between island islands 111 adjacent to each other. Specifically, unlike the base polymer shown in FIG. 2, the base polymer may be disposed in a single layer in contact with the lower substrate 110 in a region between the island substrates 111 adjacent to each other in the X-axis direction. The base polymer may be formed to overlap all of the plurality of pads formed side by side on one island substrate 111. In addition, the conductive particles may be separately formed to form a plurality of conductive paths and correspond to each of the plurality of pads on the base polymer disposed in one layer. Accordingly, the conductive paths formed by the conductive particles may be connected between the pads disposed on the island substrate 111 adjacent to each other in a straight line shape. For example, a base disposed as a layer between the island substrates 111 may be provided. Conductive particles may be injected to form four conductive paths on the upper surface of the polymer.

In addition, in some embodiments, the base polymer of the connection line 180 may be disposed in the entire region except for the region in which the plurality of island substrates 111 are disposed. The base polymer may be disposed in a single layer in contact with the lower substrate 110 in a portion of the lower substrate 110 except for a region overlapping the plurality of rigid substrates, that is, the island substrate 111. Accordingly, the remaining regions except the regions overlapping the plurality of island substrates 111 of the lower substrate 110 may be covered by the base polymer, and the base polymer may contact the pads of the plurality of island substrates 111. A portion of the polymer may be disposed to cover the edges of the plurality of island substrates 111. The conductive particles may form conductive paths connecting pads on a plurality of island substrates 111 adjacent to the base polymer.

When the base polymer is disposed as a single layer on the entire region except for the region where the plurality of island substrates 111 are disposed on the lower substrate 110, the base polymer may include the plurality of island substrates 111 among the lower substrate 110. Since it can be formed by applying to all regions except the regions, a separate process for patterning the base polymer may not be necessary. Therefore, the manufacturing process of the base polymer and the connecting wiring can be simplified, and the process cost and time can be reduced.

In addition, since the base polymer is disposed on the lower substrate 110 in a single layer in the entire region except for the region where the plurality of island substrates 111 are disposed, the force applied when the stretchable display device 100 is bent or stretched. Can be dispersed. In addition, in some embodiments, the top surface of the base polymer of the connection wiring 180 may be flat. In detail, unlike FIG. 3, the top surface of the base polymer of the connection line 180, such as the gate line and the data line, may be higher than the top surface of the planarization layer 115 on the plurality of island substrates 111. In addition, the top surface of the base polymer may be higher than the top surface of the bank 116 on the plurality of island substrates 111. Thus, the base polymer of the connection wiring 180 may have the same height of the upper surface of the portion overlapping with the plurality of island substrates 111 and the height of the upper surface of the region disposed between the plurality of island substrates 111. Thus, the top surface of the connection wire 180 may be flat. Therefore, the top surface of the conductive particles dispersed on the base polymer may be in the shape of a straight line in the cross-sectional view.

A step may exist between an upper surface of the bank 116 and an upper surface of the lower substrate 110 by various components on the plurality of island substrates 111 spaced apart from the lower substrate 110. In this case, the base polymer itself may be broken by the step of the upper surface of the base polymer, so that an electrical path between the pads disposed on the adjacent island substrate 111 may be blocked, and the defective rate of the stretchable display device may increase. Can be.

In this case, when the top surface of the base polymer is flat, the step difference between the top surfaces of the elements disposed on the plurality of island substrates 111 and the top surface of the lower substrate 110 on which the plurality of island substrates 111 are not disposed may be removed. have. As a result, even when the stretchable display device 100 is bent or stretched, it is possible to prevent the connection wire 180 including the base polymer and the conductive particles from being broken by the step. In addition, in the stretchable display device 100 according to another exemplary embodiment of the present invention, since the top surface of the base polymer is flat, damage to the connection wiring 180 can be minimized during the manufacturing process of the stretchable display device 100. have.

Referring to FIG. 3 again, the upper substrate 120, the polarizing layer 190, and the adhesive layer 118 are disposed on the encapsulation layer 117 and the lower substrate 110.

The upper substrate 120 is a substrate that supports various components disposed below the upper substrate 120. The upper substrate 120 may be formed of an insulating material that may be bent or stretched as a flexible substrate. The upper substrate 120 is a flexible substrate and may be reversibly expanded and contracted. In addition, the elastic modulus may be several MPa to several hundred MPa, and the elongation failure rate may be 100% or more. The thickness of the upper substrate 120 may be 10um to 1mm, but is not limited thereto.

The upper substrate 120 may be made of the same material as the lower substrate 110. For example, the upper substrate 120 may be elastic such as silicone rubber such as polydimethylsiloxane (PDMS) or polyurethane (PU). It is composed of a polymer (elastomer), it can have a flexible property. However, the material of the upper substrate 120 is not limited thereto.

Pressure is applied to the upper substrate 120 and the lower substrate 110 so that the upper substrate 120 and the lower substrate 110 may be bonded together by the adhesive layer 118 disposed under the upper substrate 120. However, the present invention is not limited thereto, and the adhesive layer 118 may be omitted according to an embodiment.

The polarization layer 190 is disposed on the upper substrate 120. The polarization layer 190 may polarize light incident from the outside of the stretchable display device 100. The polarized light that has passed through the polarization layer 190 and is incident into the stretchable display device 100 may be reflected inside the stretchable display device 100, and thus, the phase may be switched. Light whose phase is switched may not pass through the polarization layer 190. Accordingly, the light incident from the outside of the stretchable display device 100 into the stretchable display device 100 may not be emitted to the outside of the stretchable display device 100 and thus the stretchable display device 100 may not be emitted. ) External light reflection can be reduced.

<By multiple island boards Stretch  Properties>

Since a stretchable display device must have an easily bent or elongated property, there has been an attempt to use a substrate having a small modulus and having a ductile property. However, when a flexible material such as polydimethylsiloxane (PDMS) having a small modulus is used as a lower substrate disposed during manufacturing of the light emitting device, the modulus is weak in heat of a small material to form a transistor and a light emitting device. The problem that the substrate is damaged by the high temperature generated during the process, for example, 100 ° C. or more has occurred.

Accordingly, the light emitting device must be formed on a substrate made of a material that can withstand high temperatures, thereby preventing the substrate from being damaged in the process of forming the display panel. Accordingly, there have been attempts to form a substrate with a material that can withstand high temperatures generated during the manufacturing process, such as polyimide (PI), but materials that can withstand high temperatures have a high modulus and thus have no ductility characteristics. In the process of stretching the device, a problem arises that the substrate is difficult to bend or stretch.

Accordingly, in the stretchable display device 100 according to an exemplary embodiment, the island substrates 111 that are rigid substrates are disposed only in regions where the first transistor 150, the organic light emitting element 160, and the like are disposed. As a result, the island substrates 111 may not be damaged due to high temperatures in the manufacturing process of the first transistor 150 or the organic light emitting element 160.

In addition, in the stretchable display device 100 according to an exemplary embodiment, the lower substrate 110 and the upper substrate 120, which are flexible substrates, may be disposed below and on the plurality of island substrates 111. Accordingly, since the remaining regions of the lower substrate 110 and the upper substrate 120 except for the regions overlapping with the plurality of island substrates 111 may be easily stretched or curved, the stretchable display device 100 may be implemented. have. In addition, the first transistor 150, the organic light emitting element 160, and the like disposed on the plurality of island substrates 111, which are rigid substrates, may be prevented from being damaged as the stretchable display device 100 is bent or stretched. Can be.

<Effect of connection wiring>

Meanwhile, when the stretchable display device is bent or stretched, the lower substrate made of the flexible substrate is deformed, and the island substrate made of the rigid substrate on which the organic light emitting element is disposed may not be deformed. In this case, when the wires connecting the respective pads disposed on the plurality of island substrates are not easily bent or stretched, the wires may be damaged due to deformation of the lower substrate.

In contrast, in the stretchable display device 100 according to an exemplary embodiment, the connection wire 180 including the base polymer and the conductive particles may be electrically connected to pads disposed on each of the island substrates 111. Can be. The base polymer has a ductility that can be easily modified. Accordingly, in the stretchable display device 100 according to an exemplary embodiment, even if the stretchable display device 100 is deformed or stretched, the connection wiring 180 including the base polymer may have a plurality of island substrates. There is an effect that the region between the (111) can be easily deformed.

In addition, in the stretchable display device 100 according to an exemplary embodiment of the present disclosure, since the connection line 180 includes conductive particles, cracks or the like may be damaged by deformation of the base polymer in a conductive path made of conductive particles. This may not occur. For example, when the stretchable display device 100 is deformed, such as being bent or stretched, the lower substrate 110, which is a flexible substrate, is deformed in other regions except for an area where the plurality of island substrates 111, which are rigid substrates, are disposed. Can be. In this case, the distance between the plurality of conductive particles disposed on the lower substrate 110 may be changed. In this case, the concentration of the plurality of conductive particles disposed on the base polymer to form a conductive path may be maintained high so that an electrical signal may be transmitted even if the distance between the plurality of conductive particles is far from each other. Therefore, even if the base polymer is bent or stretched, the conductive paths by the plurality of conductive particles can smoothly transmit the electric signals, and even if the stretchable display device 100 is bent or stretched, the electric paths between the pads may be deformed. I can deliver it.

In the stretchable display device 100 according to an exemplary embodiment, the connection line 180 includes a base polymer and conductive particles, thereby connecting the pads disposed on the plurality of island substrates 111 adjacent to each other. The connection wiring 180 may be disposed in a straight line shape to form the shortest distance. That is, the stretchable display device 100 may be implemented even if the connection line 180 is not formed in a curved shape. Conductive particles of the connection wire 180 are dispersed in the base polymer to form a conductive path. As the stretchable display device 100 is bent or stretched, the conductive path by the conductive particles may be bent or stretched. In this case, only the distance between the conductive particles is changed, and the conductive path formed by the conductive particles can still transmit an electrical signal. Thus, in the stretchable display device 100 according to the exemplary embodiment, a space occupied by the connection line 180 may be minimized.

<Connecting wiring made of conductive components and curved shape>

4 is an enlarged plan view of a stretchable display device according to another exemplary embodiment. FIG. 5 is a schematic cross-sectional view of one subpixel of the stretchable display device of FIG. 4. The stretchable display device 400 of FIGS. 4 and 5 is substantially the same except that the connection wires 480 are different from those of the display device 100 illustrated in FIG. 3, and thus descriptions thereof will not be repeated. In FIG. 4, only the encapsulation layer 117 and the connection wiring 480 are shown among various components disposed on the island substrate 111 for convenience of description.

Referring to FIG. 4, the connection line 480 of the stretchable display device 400 has a curved shape. The connection line 480 electrically connects pads disposed on island islands 111 adjacent to each other among the island substrates 111 and extends in a curved shape rather than a straight line between the pads. For example, as shown in FIG. 4, the connection line 480 may have a sinusoidal shape. However, the shape of the connection wire 480 is not limited thereto, and for example, the connection wire 480 may extend in a zigzag shape, and a plurality of shapes, such as a plurality of rhombus-shaped wires, may be connected and extended at vertices. May have

Referring to FIG. 5, a gate pad 471 is formed on the gate insulating layer 113, and first connection wires 481 are formed on the gate insulating layer 113 and the lower substrate 110.

Referring to FIG. 5, the first connection wire 481 that may function as a gate wire is connected to the gate pad 471 and extends from the gate insulating layer 113 onto the lower substrate 110. Accordingly, the first connection wires 481 may electrically connect the gate pads 471 formed on the adjacent island substrates 111, respectively. The first connection wire 481 is in contact with the lower substrate 110 between the island substrates 111.

The first connection wire 481 and the gate pad 471 may be made of the same material as the gate electrode 141. Accordingly, the first connection wire 481 and the gate pad 471 may be simultaneously formed in the same process as the gate electrode 151. Therefore, the first connection wire 481 may be integrally formed by extending from the gate pad 471. However, the present invention is not limited thereto, and the gate pad 471 and the first connection line 481 may be made of different materials, or may be disposed on different layers and electrically connected to each other.

Referring to FIG. 5, a second connection line 482 may be formed on the interlayer insulating layer 114 to function as a data line. In this case, the source electrode 153 extends outside the island substrate 111 to function as a data pad, and may be electrically connected to the second connection wire 482. However, the present invention is not limited thereto, and a data pad extending from the source electrode 153 or electrically connected to the source electrode 153 may be defined separately.

In addition, the second connection wire 482 is connected to the source electrode 153 and extends from the island substrate 111 adjacent to the lower substrate 110. Accordingly, the second connection wire 482 may electrically connect the data pads formed on each of the adjacent island substrates 111. The second connection wire 482 is in contact with the lower substrate 110 between the plurality of island substrates 111.

The second connection wire 482 may be made of the same material as the data pad, that is, the source electrode 153. Accordingly, the second connection wire 482, the source electrode 153, and the drain electrode 154 may be simultaneously formed in the same process. Therefore, the second connection wire 482 may extend from the source electrode 153 and be integrally formed. However, the present invention is not limited thereto, and the second connection wire 482 and the source electrode 153 may be made of different materials, or may be disposed on different layers and electrically connected to each other.

In the stretchable display device 400 according to another exemplary embodiment, pads formed on the plurality of island substrates 111, such as the first connection line 481 and the second connection line 482, are electrically connected to each other. The connection line 480 may be made of the same material as at least one of the plurality of conductive components disposed on the plurality of island substrates 111. For example, the first connection wire 481 may be made of the same material as the gate electrode 151, and the second connection wire 482 may be made of the same material as the source electrode 153. However, the present invention is not limited thereto, and the connection wiring 480 may be formed of organic materials such as the drain electrode 154, the anode 161 of the organic light emitting diode 160, and the cathode 163 in addition to the gate electrode 151 and the source electrode 153. The light emitting device 160 may be formed of the same material as an electrode of the light emitting device 160 and various wirings included in the stretchable display device 400. Accordingly, in the stretchable display device 400 according to another exemplary embodiment, the stretchable display device 400 is disposed on the plurality of island substrates 111 and is connected during the manufacturing process of the conductive component made of the same material as the connection line 480. Since the wires 480 may be formed at the same time, a separate manufacturing process may not be necessary to form the connection wires 480.

Meanwhile, a conductive reinforcing member may be disposed below or above a portion of the connection line 480 of FIGS. 4 and 5. The conductive reinforcing member is a component that prevents the connection wiring from being damaged or broken when the stretchable display device 400 is repeatedly drawn, and furthermore, the conductive reinforcing member contacts the connection wiring even when the connection wiring is broken.

The conductive reinforcing member may be a conductive polymer comprising a base polymer and conductive particles evenly dispersed in the base polymer. The conductive reinforcing member may have a flexible property by having the property that the base polymer easily stretches.

The base polymer may include SBS (Styrene Butadiene Styrene) as a base layer on which conductive particles may be dispersed, but is not limited thereto. In addition, the conductive particles are conductive particles, and may include at least one of silver (Ag), gold (Au), and carbon (Carbon).

The conductive reinforcing member may be disposed adjacent to the side portions of the plurality of island substrates 111 under or over the connection line 480. For example, the conductive reinforcing member may be in contact with the bottom surface of the connection wiring 480 and in contact with the side surface of the island substrate 111, or may be disposed in contact with the top surface of the connection wiring 480 and adjacent to the side surface of the island substrate 111. Can be.

By the thicknesses of various components disposed on the plurality of island substrates 111, the connection lines 480 disposed on the plurality of island substrates 111 and the connection lines 480 disposed on the lower substrate 110 are provided. There may be steps. In this case, a conductive reinforcing member including a base polymer having a flexible property in contact with or adjacent to the side surfaces of the plurality of island substrates 111 and below the connection wiring 480 may be generated in the connection wiring 480. Possible damage can be minimized.

In addition, when the conductive reinforcing member is disposed between the connection wiring 480 and the lower substrate 110, the adhesive force between the connection wiring 480 and the lower substrate 110 may be strengthened, and the connection wiring 480 may be lowered. Peeling from the substrate 110 can be prevented.

In addition, when the conductive reinforcing member is disposed on the connection wiring 480, the conductive reinforcing member is formed by the adhesive layer 118 after all of the various components on the connection wiring 480 and the plurality of island substrates 111 are formed. Before the upper substrate 520 and the polarization layer 190 are bonded, the upper substrate 520 and the polarization layer 190 may be formed on the connection line 480. Therefore, the manufacturing process of the conductive reinforcing member may be more easily performed, and manufacturing time or manufacturing cost may be minimized.

Meanwhile, the conductive reinforcing member may include a liquid metal. Liquid metal refers to a metal present in the liquid state at room temperature. For example, the liquid metal may include, but is not limited to, at least one of gallium, indium, sodium, lithium, and alloys thereof. When a crack occurs in the connection wire 480, the liquid metal may fill the crack of the connection wire 480. Therefore, when the conductive reinforcement member includes a liquid metal, the stretchable display device 400 is deformed or deformed, such that the crack is generated in the connection wiring 480. By filling the crack with the liquid metal, disconnection of the connection line 480 can be minimized. In addition, as the liquid metal has conductivity, the resistance of the connecting wiring 480 and the entire liquid metal can be reduced, so that an electrical signal can be transmitted more smoothly between the pads on the plurality of island substrates 111. It works.

Meanwhile, the conductive reinforcing member may be disposed in the peak area of the connection line 480. The peak area of the connection line 480 refers to a region having the largest amplitude among the curved connection lines 480. For example, when the connection line 480 has a sinusoidal shape, a point where the amplitude of the connection line 480 is maximized may be defined as a peak area. When the stretchable display device 400 is bent or stretched or deformed, stress may be concentrated in the peak area of the connection line 480 than in other areas of the connection line 480.

In this case, the conductive reinforcement member may be disposed at an inner edge of the peak area of the connection line 480. The inner edge of the peak area of the connection line 480 means a region where the radius of curvature is relatively small in the peak area of the connection line 480, and the outer edge of the peak area has a radius of curvature in the peak area of the connection line 480. It may mean a relatively large area. In this case, the conductive reinforcing member may be disposed below or above the connection line 480 at the inner edge of the peak area of the connection line 480.

When the stretchable display device 400 is bent or stretched or deformed, damage such as cracks or broken wires may be more easily generated in the peak area of the connection line 480, particularly, the inner edge of the peak area, compared to other areas. have. In this case, even when damage occurs in the peak area of the connection line 480 or the inner edge of the peak area, the conductive reinforcing member may prevent the electrical signal from being blocked, and thus, the electrical signal of the stretchable display device 400. The delivery can be made stable.

<Additional sub pixel>

6 is an enlarged plan view of a stretchable display device according to still another embodiment of the present invention. FIG. 7A is a schematic cross-sectional view of the stretchable display of FIG. 6. FIG. 7B is a schematic cross-sectional view of the stretchable display device of FIG. 7A. The stretchable display device 600 illustrated in FIG. 6 has a shape of the lower substrate 610 and additional pixels on the lower substrate 610 as compared to the stretchable display device 100 illustrated in FIGS. 1 to 3. Since APX is disposed and the connection wiring 680 is changed, the description thereof is substantially the same, and thus redundant description is omitted.

Referring to FIG. 6, the lower substrate 610 of the stretchable display device 600 includes a plurality of first regions A1 in which a plurality of island substrates 111 are disposed and first connection wirings of the connection wiring 680. A plurality of second regions A2 and a plurality of additional sub-pixels ASPX1, ASPX2, except for the plurality of second regions A2 and the first region A1 and the second region A2 in which the 681 and the second connection wiring 682 are disposed. A plurality of third regions A3 in which a plurality of additional pixels APX including the ASPX3 are defined is defined.

6 and 7A, the plurality of first regions A1 are regions in which the plurality of island substrates 111 are disposed and are rigid regions. The plurality of first regions A1 are spaced apart from each other and defined on the lower substrate 610. For example, the plurality of first regions A1 may be disposed in a matrix form on the lower substrate 610 as illustrated in FIG. 6, but is not limited thereto.

Referring to FIG. 7A, an upper surface of the first area A1 of the lower substrate 610 is flat. That is, the first region A1 of the lower substrate 610 is formed without bending or irregularities, and thus, the plurality of island substrates 111 disposed on the first region A1 of the lower substrate 610 are also flat. Can be arranged.

6 and 7A, an organic light emitting element 160 is disposed in each of the plurality of first regions A1 to correspond to each of the plurality of sub-pixels SPX1, SPX2, and SPX3 of the pixel PX. In detail, a first organic light emitting diode emitting red light is disposed in the first subpixel SPX1, and a second organic light emitting diode emitting green light is disposed in the second subpixel SPX2, and a third subpixel ( SPX3), a third organic light emitting device that emits blue light may be disposed. In addition, a fourth organic light emitting diode emitting white light may be disposed. Thus, the plurality of first regions A1 may be referred to as a first emission region or a first opening region.

Referring to FIG. 6, a plurality of second regions A2 are defined to be adjacent to the plurality of first regions A1. In detail, the plurality of second regions A2 are defined between two first regions A1 neighboring each other. Thus, as shown in FIG. 6, a plurality of first regions A1 are defined on the upper side, the lower side, the left side, and the right side of the second region A2. The plurality of second areas A2 are areas in which the first connection wires 681 and the second connection wires 682 of the connection wires 680 are disposed and are flexible. That is, the first connection wiring 681 and the second connection wiring 682 connecting the pads of the plurality of island substrates 111 adjacent to each other are disposed in the plurality of second regions A2. The plurality of second regions A2 are spaced apart from each other and defined on the lower substrate 610. For example, as illustrated in FIG. 6, the plurality of second regions A2 may be disposed in a matrix form on the lower substrate 610, but is not limited thereto. Meanwhile, in the present specification, the second area A2 may be referred to as a wiring area.

Referring to FIG. 7A, an upper surface of the second region A2 of the lower substrate 610 has an uneven shape. That is, the upper surface of the second area A2 of the lower substrate 610 may be formed to be bent on a cross section. Accordingly, the second connection wire 682 disposed on the second area A2 of the lower substrate 610 may also be formed to correspond to the uneven shape of the upper surface of the second area A2. Accordingly, the second connection wire 682 may be formed to have an uneven shape, such as a sine wave shape, on a cross section. Although not shown in FIG. 7A, the first connection wire 681 may also be formed to correspond to the uneven shape of the upper surface of the second area A2.

Referring to FIG. 6, a plurality of third regions A3 are defined at portions surrounded by the plurality of first regions A1 and the plurality of second regions A2. Referring to FIG. 6, the second region A2 is defined on the upper side, the lower side, the right side, and the left side of each of the plurality of third regions A3, and the first region A1 is defined adjacent to four diagonal directions. .

An additional organic light emitting element 660 ′ may be disposed in each of the third regions A3 to correspond to each of the plurality of additional sub-pixels ASPX1, ASPX2, and ASPX3. In detail, a first additional organic light emitting device for emitting red light is disposed in the first additional sub-pixel ASPX1, a second additional organic light emitting device for emitting green light is disposed in the second additional sub pixel, and a third additional sub The third additional organic light emitting diode emitting blue light is disposed in the pixel ASPX3. Thus, the plurality of third regions A3 may be referred to as a second light emitting region or a second opening region.

Referring to FIG. 7A, an upper surface of the third region A3 of the lower substrate 610 has an uneven shape. That is, the upper surface of the third region A3 of the lower substrate 610 may be formed to be bent on a cross section. Accordingly, the additional organic light emitting diode 660 ′ disposed on the third region A3 of the lower substrate 610 may also be formed to correspond to the uneven shape of the upper surface of the third region A3. Accordingly, the additional anode 661 ′, the additional organic light emitting layer 662 ′, and the additional cathode 663 ′ of the additional organic light emitting element 660 ′ have an uneven shape corresponding to the third region A3 of the lower substrate 610. May have Meanwhile, in the present specification, the third region A3 may be referred to as a second emission region.

6 and 7A, a plurality of connection wires 680 are disposed on the lower substrate 610. In detail, the plurality of connection wires 680 may include one of a first connection wire 181, a second connection wire 682, and a first area A1 that connect pads of a plurality of island substrates 111 adjacent to each other. Additional organic light emitting diodes disposed in the anode 161 of the organic light emitting diode 160 disposed in the subpixels SPX1, SPX2, and SPX3 of the second subpixel ASPX1, ASPX2, and ASPX3 of the third region A3. Third connection wiring 683 connecting the additional anode 661 'of the element 660' and addition of the cathode 163 and the third region A3 of the organic light emitting element 160 of the first region A1. It may include a fourth connection line 884 connecting the additional cathode 663 ′ of the organic light emitting element 660 ′.

6 and 7A, a plurality of first connection wires 681 and second connection wires 682 are arranged in a plurality of first areas A1 adjacent to each other in a plurality of second areas A2. Pads of the island substrate 111 may be connected. As shown in FIG. 7B, the first connection wire 681 is disposed to extend in the X-axis direction, and the second connection wire 682 is disposed to extend in the Y-axis direction.

6 and 7A, the third connection wire 683 may connect the anode 161 disposed in the first region A1 and the additional anode 661 ′ disposed in the third region A3. . Accordingly, the third connection wire 683 may be made of the same material as the anode 161 and the additional anode 661 ′. For example, the third connection wiring 683, the anode 161 of the organic light emitting element 160, and the additional anode 661 ′ of the additional organic light emitting element 660 ′ may be simultaneously formed of the same material to be integrally formed. have. However, the present invention is not limited thereto, and the third connection wire 683 may be formed by a separate process from a material different from the anode 161 and the additional anode 661 ′, for example, the first transistor 150. The first gate electrode 151, the first source electrode 153, and the first drain electrode 154 may be formed of the same material.

On the other hand, the third connection wire 683 further emits organic light of the plurality of additional sub-pixels ASPX1, ASPX2, and ASPX3 that emit the same color as the organic light emitting element 160 of the plurality of sub-pixels SPX1, SPX2, and SPX3. The device 660 'may be connected. That is, the third connection wire 683 is connected to the anode of the first organic light emitting diode of the first subpixel SPX1 emitting red light and the first additional organic light emitting diode of the first additional subpixel ASPX1 emitting red light. The additional anode is connected, and the anode of the second organic light emitting element of the second sub-pixel SPX2 emitting green light and the additional anode of the second additional organic light emitting element of the second additional sub pixel ASPX2 emitting green light are connected. The anode of the third organic light emitting diode of the third subpixel SPX3 emitting blue light and the additional anode of the third additional organic light emitting diode of the third additional subpixel ASPX3 emitting blue light may be connected. Therefore, when any one of the plurality of sub-pixels SPX1, SPX2, and SPX3 emits light, the additional sub-pixels ASPX1, ASPX2, and ASPX3 that emit the same color may emit light together.

The third connection wire 683 is in contact with the side surfaces of the planarization layer 115, the interlayer insulating layer 114, the buffer layer 112, and the plurality of island substrates 111 on the planarization layer 115 and is on the top surface of the lower substrate 610. Is formed to extend. The third connection wiring 683 is in contact with the lower substrate 610 between the island substrate 111 and the plurality of additional sub-pixels ASPX1, ASPX2, and ASPX3.

Referring to FIG. 7A, a bank 616 disposed on a plurality of island substrates 111 may be disposed on a portion of the additional anode 661 ′ of the additional organic light emitting element 660 ′ disposed in the third region A3. Extends. Specifically, in the third region A3, the bank 616 is disposed to overlap only a portion of the region on the additional anode 661 ′ of the additional organic light emitting element 660 ′. Accordingly, the bank 616 may serve to prevent the additional anode 661 'and the additional cathode 663' of the additional organic light emitting element 660 'from being shorted and connected to each other.

Referring to FIG. 7A, an additional organic light emitting layer 662 ′ is disposed on an additional anode 661 ′ of the additional organic light emitting element 660 ′. The additional organic light emitting layer 662 ′ may have an uneven shape to correspond to the additional anode 661 ′ of the additional organic light emitting element 660 ′ having the uneven shape.

In addition, the organic light emitting layer 162 of the organic light emitting element 160 of each of the plurality of subpixels SPX1, SPX2, and SPX3 may further emit organic light of each of the plurality of additional subpixels ASPX1, ASPX2, and ASPX3 that emit the same color. It may be made of the same material as the additional organic light emitting layer 662 'of the device 660'. The organic light emitting layer of the first organic light emitting diode of the first subpixel SPX1 emitting red light and the additional organic light emitting layer of the first additional organic light emitting diode of the first additional subpixel ASPX1 emitting red light may be formed of the same material. The organic light emitting layer of the second organic light emitting diode of the second subpixel SPX2 emitting green light and the additional organic light emitting layer of the second additional organic light emitting diode of the second additional subpixel ASPX2 emitting green light may be formed of the same material. The organic light emitting layer of the third organic light emitting diode of the third subpixel SPX3 emitting blue light and the additional organic light emitting layer of the third additional organic light emitting diode of the third additional subpixel ASPX3 emitting blue light may be formed of the same material. Can be done.

Referring to FIG. 7A, an additional cathode 663 ′ is disposed on an additional organic light emitting layer 662 ′ of the additional organic light emitting element 660 ′. The additional cathode 663 ′ may be patterned to overlap each of the lower substrates 610 of the third region A3. In this case, the additional cathode 663 ′ may be disposed as a single cathode on the plurality of additional sub pixels ASPX1, ASPX2, and ASPX3. Here, the additional cathode 663 ′ has an uneven shape to correspond to the additional anode 661 ′ of the additional organic light emitting element 660 ′ having the uneven shape.

The fourth connection wire 684 may connect the cathode 163 disposed in the first region A1 and the additional cathode 663 ′ disposed in the third region A3. Accordingly, the fourth connection wire 684 may be made of the same material as the cathode 163 and the additional cathode 663 ′. For example, as shown in FIG. 6, the fourth connection wiring 684, the cathode 163 of the organic light emitting element 160, and the additional cathode 663 ′ of the additional organic light emitting element 660 ′ are made of the same material. At the same time can be formed integrally. However, the present invention is not limited thereto, and the fourth connection wire 684 may be formed of a material different from the cathode 163 and the additional cathode 663 ′ in a separate process,

Referring to FIG. 7B, when the stretchable display device 600 is stretched, the connection wiring 680 may be stretched together with the lower substrate 610. For example, as the lower substrate 610 is stretched, the second connection wiring 682 and the third connection wiring 683 formed in the uneven shape in the second region A2 and the third region A3 are stretched. It can be a straight shape.

In addition, referring to FIG. 7B, when the stretchable display device 600 is stretched, an additional organic light emitting element 660 ′ may be stretched together with the lower substrate 610. Specifically, the additional anode 661 ′, the additional organic light emitting layer 662 ′, and the additional cathode 663 ′ of the additional organic light emitting element 660 ′ having the curved shape may be stretched to form a straight line shape.

In general, when the stretchable display device is bent or stretched, the lower substrate made of the flexible substrate is deformed, and the island substrate made of the rigid substrate on which the organic light emitting element is disposed may not be deformed. In this case, when the wires connecting the respective pads disposed on the plurality of island substrates are not easily bent or stretched, the wires may be damaged due to deformation of the lower substrate.

Accordingly, the stretchable display device 600 according to another exemplary embodiment of the present invention may have a portion of the lower substrate 610 that does not have any function as a dummy, that is, a first region in which the plurality of island substrates 111 are disposed. The area of the stretchable display device 600 can be efficiently provided by arranging the additional pixel APX in the third region A3 except the second region A2 in which the A1 and the connection wiring 680 are disposed. In addition, the aperture ratio of the stretchable display device 600 may be increased. For example, as shown in FIG. 6, when the additional pixel APX is disposed in the stretchable display device 600, the aperture ratio may increase by twice. Accordingly, the brightness of the stretchable display device 600 according to another exemplary embodiment may also be improved.

Also, in the stretchable display device 600 according to another exemplary embodiment, the pixel PX and the additional pixel APX share the first transistor 150 disposed on the island substrate 111. do. That is, when the first transistor 150 is driven, both the organic light emitting device 160 and the additional organic light emitting device 660 ′ connected to the same first transistor 150 may be driven. Accordingly, in the stretchable display device 600 according to another exemplary embodiment, the organic light emitting element 160 and the additional organic light emitting element 660 ′ are disposed on a plurality of island substrates 111. By sharing one transistor 150, the aperture ratio of the stretchable display device 600 may be increased without additional circuitry.

In addition, in the stretchable display device 600 according to another exemplary embodiment, even when the stretchable display device 600 is stretched by forming the additional pixel APX in the third region A3. It is possible to prevent deterioration of the image quality of the stretchable display device 600. That is, when the additional pixel APX is not used, only the pixels PX disposed on the plurality of island substrates 111 emit light when the stretchable display device 600 is stretched. Since the area between the layers is stretched, the spacing between the plurality of island substrates 111 can be increased as compared with before stretching. Thus, a problem may occur in that image quality deteriorates when the stretchable display device 600 is stretched. Accordingly, in the stretchable display device 600 according to another exemplary embodiment, the additional pixel APX is disposed in the third area A3 to emit light even when the stretchable display device 600 is stretched. The distance between the regions can be kept constant. Therefore, in the stretchable display device 600 according to another exemplary embodiment, the image quality of the stretchable display device 600 may be minimized when the stretchable display device 600 is stretched.

In addition, in the state before the stretchable display device 600 is stretched, the additional organic light emitting diode 660 ′ may have a curved shape. That is, the additional organic light emitting element 660 ′ may also have an uneven shape due to the uneven shape of the lower substrate 610 disposed under the additional organic light emitting element 660 ′, and thus, the additional organic light emitting element 660 ′. It is possible to improve the light extraction efficiency.

In addition, in the stretchable display device 600 according to another exemplary embodiment, the second area A2 and the third area of the lower substrate 610 on which the connection line 680 and the additional pixel APX are disposed. As the upper surface of A3 has an uneven shape, stress generated when the stretchable display device 600 is stretched can be alleviated. That is, an additional organic light emitting element disposed in the connection line 680 and the additional pixel APX may have a shape corresponding to the uneven shape of the upper surface of the second region A2 and the third region A3 of the lower substrate 610 ( 660 ′, the connection line 680 and the additional organic light emitting element 660 ′ may be easily stretched when the stretchable display device 600 is stretched, and the connection line 680 and the additional organic light emitting element ( The stress that may occur in the 660 ′ may be alleviated to minimize damage of the connection line 680 and the additional organic light emitting element 660 ′, and an increase in resistance of the connection line 680 may be minimized.

Although not illustrated in FIGS. 6 to 7B, the lower substrate 610, the upper substrate 120, and the polarizer 190 of the stretchable display device 600 may include a rigid pattern and a flexible pattern. For example, the lower substrate 610 may include a rigid pattern disposed in an area overlapping the plurality of island substrates 111 and a flexible pattern disposed in an area except for the rigid pattern. Here, the rigid pattern is a pattern having a modulus higher than that of the flexible pattern, and is a pattern having a relatively rigidity and may have the same modulus as the plurality of island substrates 111. In addition, the upper substrate 120 and the polarizer 190 may include a rigid pattern disposed in an area overlapping the plurality of island substrates 111 and a flexible pattern disposed in an area except for the rigid pattern. Accordingly, the lower substrate 610, the upper substrate 120, and the polarizing plate 190 of the region overlapping the plurality of island substrates 111 have rigidity, but the lower portion of the region not overlapping the plurality of island substrates 111. Since the substrate 610, the upper substrate 120, and the polarizer 190 are flexible, only the regions not overlapping the plurality of island substrates 111 may be stretched when the stretchable display device 600 is stretched. have.

<Additional pixel driven independent of pixel>

8 is an enlarged plan view of a stretchable display device according to still another embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of the stretchable display device of FIG. 8. The stretchable display device 800 illustrated in FIGS. 8 and 9 is compared to the stretchable display device 600 illustrated in FIGS. 6 to 7B except that the second transistor 850 ′ is added. Since it is substantially the same, duplicate description is abbreviate | omitted.

8 and 9, a second gate electrode 851 ′, a second active layer 852 ′, a second source electrode 853 ′, and a second drain electrode 854 ′ are disposed on the buffer layer 112. A second transistor 850 ′ is formed. For example, a second active layer 852 'is formed on the buffer layer 112, and the second active layer 852' and the second gate electrode 851 'are formed on the second active layer 852'. A gate insulating layer 113 for insulating is formed. An interlayer insulating layer 114 is formed to insulate the second gate electrode 851 ', the second source electrode 853', and the second drain electrode 854 ', and a second layer is formed on the interlayer insulating layer 114. A second source electrode 853 'and a second drain electrode 854' are formed to contact the active layer 852 ', respectively.

The planarization layer 115 is formed on the first transistor 150, the second transistor 850 ′, and the interlayer insulating layer 114. The planarization layer 115 planarizes the upper portion of the first transistor 150 and the second transistor 850 '. The planarization layer 115 may include a contact hole for electrically connecting the first transistor 150 and the anode 161, a contact hole for electrically connecting the data pad 173 and the first source electrode 153, and a second hole. It may include a contact hole for connecting the drain electrode 854 ′ and the third connection wire 883.

In some embodiments, a passivation layer may be formed between the first transistor 150 and the second transistor 850 ′ and the planarization layer 115. That is, a passivation layer covering the first transistor 150 and the second transistor 850 'may be formed to protect the first transistor 150 and the second transistor 850' from penetration of moisture and oxygen. have. The passivation layer may be made of an inorganic material, but may be made of a single layer or a multilayer, but is not limited thereto.

9, an additional organic light emitting element 660 ′ connected to the second transistor 850 ′ is disposed in the third region A3 of the lower substrate 610 through the third connection line 883. The additional organic light emitting diode 660 ′ and the organic light emitting diode 160 disposed on the island substrate 111 may be connected to different transistors to perform independent driving.

The additional sub-pixels ASPX1, ASPX2, and ASPX3 of the stretchable display device 800 may further include the sub-pixels SPX1, SPX2, and SPX3 disposed on the island substrates 111. Are connected to different circuits. Accordingly, in the stretchable display device 800 according to another exemplary embodiment, the additional subpixels ASPX1, ASPX2, and ASPX3 are independently driven to increase resolution. Can be. For example, as illustrated in FIG. 8, when the additional pixel APX is disposed in the stretchable display device 800, the resolution may be doubled.

< Flexible Encapsulation Layer >

10 is an enlarged plan view of a stretchable display device according to still another embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of the stretchable display device of FIG. 10. 12 is a schematic cross-sectional view of a stretchable display device according to still another embodiment of the present invention. The stretchable display device 1000 illustrated in FIGS. 10 and 11 is substantially the same except that the encapsulation layer 1017 is different from that of the stretchable display device 600 illustrated in FIGS. 6 to 7B. The duplicate description is omitted. In addition, the stretchable display device 1200 illustrated in FIG. 12 is substantially the same except that the encapsulation layer 1017 is different from the stretchable display device 800 illustrated in FIGS. 8 and 9. , Duplicate description is omitted.

First, referring to FIGS. 10 and 11, the encapsulation layer 1017 includes the plurality of first encapsulation layers 1017a and the second regions (eg, disposed on the organic light emitting element 160 disposed in the first region A1). A connection wiring 680 disposed in A2) and a plurality of second encapsulation layers 1017b disposed on the additional organic light emitting element 660 '. The first encapsulation layer 1017a may cover the organic light emitting device 160 and contact the portion of the upper surface of the bank 116 to seal the organic light emitting device 160. In addition, the second encapsulation layer 1017b may be disposed to cover the connection line 680 disposed in the second region A2, and the additional organic light emitting element 660 ′ disposed in the third region A3 may be disposed. It may be arranged to cover.

The encapsulation layer 1017 may be made of a material that is flexible and excellent in elasticity, and may protect the organic light emitting device 160 and the additional organic light emitting device 660 ′ from moisture, air, and the like that can penetrate from the outside. That is, the encapsulation layer 1017 may be made of an encapsulation material having stretching characteristics. For example, the encapsulation layer 1017 may be made of graphene. Graphene is a material in which carbon atoms have a honeycomb structure in a plane, and is very thin, transparent, and excellent in elasticity. In addition, the encapsulation layer may be made of graphene oxide (GO) or reduced graphene oxide (rGO). However, the present invention is not limited thereto, and various materials may be used as the encapsulation layer 1017 as long as the material has excellent elasticity and can protect the organic light emitting device 160 and the additional organic light emitting device 660 'from moisture, air, and the like. .

In addition, referring to FIG. 12, the stretchable display device 1200 is flexible and excellent in stretchability and penetrates from the outside in the same manner as the stretchable display device 1000 described with reference to FIGS. 10 and 11. An encapsulation layer 1017 may be used to protect the organic light emitting device 160 and the additional organic light emitting device 660 'from moisture, air, and the like.

In the stretchable display devices 1000 and 1200 according to another exemplary embodiment of the present invention, the organic light emitting device 160 and the additional organic light emitting device 160 may be flexible and excellent in elasticity, and may be formed from moisture, air, or the like that may penetrate from the outside. By forming the encapsulation layer 1017 to protect the 660 ′, damage such as cracking in the encapsulation layer 1017 can be effectively prevented in the process of stretching the stretchable display devices 1000 and 1200. have. In addition, since the second encapsulation layer 1017b prevents damage of the additional organic light emitting element 660 'from moisture or oxygen, the reliability of the additional organic light emitting element 660' may be improved.

Accordingly, in the stretchable display apparatuses 1000 and 1200 according to another exemplary embodiment of the present invention, the encapsulation layer 1017 is not formed in an area between the island substrates 111, so that the stretchable display apparatus ( Damage to the encapsulation layer 1017 may be minimized even when the 1000 is deformed or deformed.

<LED disposed in sub pixel>

On the other hand, as described above, the stretchable display device according to an embodiment of the present invention has been described taking the case that the light emitting device is an organic light emitting device as an example, the light emitting device of the stretchable display device 1300 is an LED Can be done. Next, when the light emitting device of the stretchable display device 1300 is an LED, the structure of one sub-pixel will be described.

13A is a schematic cross-sectional view of a subpixel of a stretchable display device according to still another embodiment of the present invention. FIG. 13B is a schematic cross-sectional view illustrating a case where the stretchable display device of FIG. 13A is stretched. The stretchable display device 1300 illustrated in FIGS. 13A and 13B has a substantial configuration except that the stretchable display device 700 of FIGS. 7A and 7B differs from the LED 1360. The same bar, duplicate description is omitted.

Referring to FIG. 13A, a common wiring CL is disposed on the gate insulating layer 113. The common wiring CL is a wiring for applying a common voltage to the plurality of sub pixels SPX. The common line CL may be made of the same material as the gate electrode 151 of the transistor 150, but is not limited thereto.

The first connection pad 1381 and the second connection pad 1383 are disposed on the planarization layer 115.

The first connection pad 1361 electrically connects the transistor 150 and the LED 1360. The first connection pad 1361 is connected to the drain electrode 154 of the transistor 150 through a contact hole formed in the planarization layer 115. However, the present invention is not limited thereto, and the first connection pad 1381 may be connected to the source electrode 153 of the transistor 150 according to the type of the transistor 150. Accordingly, the p-electrode 1365 of the LED 1360 and the drain electrode 154 of the transistor 150 are electrically connected by the first connection pads 1381.

The second connection pad 1383 electrically connects the LED 1360 and the common wiring CL. In detail, the second connection pad 1383 is connected to the common line CL through contact holes formed in the planarization layer 115 and the interlayer insulating layer 114. Therefore, the common wire CL and the n electrode 1164 of the LED 1360 are electrically connected by the second connection pad 1383.

The LED 1360 is disposed on the first connection pad 1381 and the second connection pad 1383. The LED 1360 includes an n-type layer 1361, an active layer 1362, a p-type layer 1363, an n-electrode 1164, and a p-electrode 1365. The LED 1360 of the display device 1300 according to another exemplary embodiment of the present invention has a structure of a flip chip in which n electrodes 1164 and p electrodes 1365 are formed on one surface thereof.

The n-type layer 1361 may be formed by implanting n-type impurities into gallium nitride (GaN) having excellent crystallinity. The n-type layer 1361 may be disposed on a separate base substrate made of a material capable of emitting light.

The active layer 1362 is disposed on the n-type layer 1361. The active layer 1362 is a light emitting layer emitting light from the LED 1360 and may be formed of a nitride semiconductor, for example, indium gallium nitride (InGaN). The p-type layer 1363 is disposed on the active layer 1362. The p-type layer 1363 may be formed by implanting p-type impurities into gallium nitride (GaN).

As described above, the LED 1360 according to the embodiment of the present invention laminates the n-type layer 1361, the active layer 1362, and the p-type layer 1363 in order, and then etches a predetermined portion. The n electrode 1164 and the p electrode 1365 are manufactured in such a manner as to be formed. In this case, the predetermined portion is a space for separating the n-electrode 1164 and the p-electrode 1365, and the predetermined portion is etched to expose a portion of the n-type layer 1361. In other words, the surfaces of the LEDs 1360 on which the n-electrodes 1164 and the p-electrodes 1365 are to be disposed may have different height levels rather than flattened surfaces.

As such, the n-electrode 1164 is disposed on the etched region, that is, the n-type layer 1361 exposed by the etching process. The n electrode 1164 may be made of a conductive material. On the other hand, the p-electrode 1365 is disposed on the non-etched region, that is, the p-type layer 1363. The p-electrode 1365 may also be made of a conductive material. For example, the p-electrode 1365 may be made of the same material as the n-electrode 1164.

The adhesive layer AD is disposed between the top surfaces of the first connection pads 1381 and the second connection pads 1383 and the first connection pads 1381 and the second connection pads 1383, so that the LEDs 1360 are firstly disposed. It may be adhered to the connection pads 1381 and the second connection pads 1383. In this case, the n electrode 1344 may be disposed on the second connection pad 1383, and the p electrode 1365 may be disposed on the first connection pad 1381.

The adhesive layer AD may be a conductive adhesive layer in which conductive balls are dispersed in an insulating base member. Thus, when heat or pressure is applied to the adhesive layer AD, the conductive balls may be electrically connected in a portion to which the heat or pressure is applied to have conductive properties, and the non-pressurized region may have insulating properties. For example, the n-electrode 1364 is electrically connected to the second connection pad 1383 through the adhesive layer AD, and the p-electrode 1365 is electrically connected to the first connection pad 1381 through the adhesive layer AD. Is connected. That is, after the adhesive layer AD is applied on the first connection pads 1381 and the second connection pads 1383 by inkjet or the like, the LED 1360 is transferred onto the adhesive layer AD, and the LEDs 1360. The first connection pad 1381 and the p-electrode 1365 and the second connection pad 1383 and the n-electrode 1164 may be electrically connected to each other by applying pressure and heating. However, the portion of the adhesive layer AD disposed between the n-electrode 1164 and the second connection pad 1383 and the portion of the adhesive layer AD disposed between the p-electrode 1365 and the first connection pad 1381 are removed. The other part of the adhesive layer AD except the one has an insulating property. Meanwhile, the adhesive layer AD may be disposed on each of the first connection pads 1381 and the second connection pads 1383 in a separated form.

As described above, the stretchable display device 1300 according to another embodiment of the present invention has a structure in which the LED 1360 is disposed on the lower substrate 110 on which the transistor 150 is disposed. When the display device 13000 is turned on, different voltage levels applied to each of the first connection pads 1381 and the second connection pads 1383 are transferred to the n electrode 1164 and the p electrode 1365, respectively. LED 1360 emits light.

Meanwhile, referring to FIG. 13B, when the stretchable display device 1300 is stretched, connection wirings 682 and 683 may be stretched together with the lower substrate 610. For example, as the lower substrate 610 is stretched, the second connection wiring 682 and the third connection wiring 683 formed in the uneven shape in the second region A2 and the third region A3 are stretched. It can be a straight shape.

In addition, referring to FIG. 13B, when the stretchable display device 600 is stretched, an additional organic light emitting element 660 ′ may be stretched together with the lower substrate 610. Specifically, the additional anode 661 ′, the additional organic light emitting layer 662 ′, and the additional cathode 663 ′ of the additional organic light emitting element 660 ′ having the curved shape may be stretched to form a straight line shape.

As described above, in the stretchable display device 1300 according to another exemplary embodiment, the light emitting device may be formed of the LED 1360. Since the LED 1360 is made of an inorganic material rather than an organic material, the LED 1360 has excellent reliability and has a longer life than a liquid crystal display device or an organic light emitting device. In addition, the LED 1360 is a device suitable for being applied to a very large screen because it not only has a fast lighting speed but also has low power consumption, strong impact resistance, excellent stability, and high luminous efficiency to display a high brightness image. . In particular, since the LED 1360 is made of an inorganic material rather than an organic material, an encapsulation layer required when using an organic light emitting device may not be used. As a result, the encapsulation layer, which may be damaged, may be omitted in the process of stretching the stretchable display device. Therefore, in the stretchable display device according to still another exemplary embodiment of the present invention, the LED 1360 is used as a light emitting device, and thus the use of an encapsulation layer that may be damaged when the stretchable display device is deformed, such as bending or stretching, is used. Can be omitted. In addition, since the LED 1360 is formed of an inorganic material rather than an organic material, the light emitting device of the stretchable display device according to another exemplary embodiment of the present invention may be protected from moisture or oxygen, and may have excellent reliability. .

<LED disposed in additional sub pixel>

Meanwhile, as described above, in the stretchable display device according to another exemplary embodiment of the present invention, an example in which the organic light emitting diode is disposed in the additional sub-pixel has been described as an example. However, the stretchable display device 1400 may be added. The light emitting device disposed in the sub pixel may be formed of an LED. Next, a case in which the light emitting device disposed in the additional sub-pixel in the stretchable display device 1400 according to another exemplary embodiment of the present invention is an LED.

14A is a schematic cross-sectional view of a subpixel of a stretchable display device according to still another embodiment of the present invention. 14B is a schematic cross-sectional view illustrating a case where the stretchable display device of FIG. 14A is stretched. Stretchable display device 1400 shown in FIGS. 14A and 14B Compared to the stretchable display device 1300 of FIGS. 13A and 13B, except that the light emitting devices disposed in additional subpixels are different from the LEDs 1460. Since the substantial configuration is the same, duplicate description of the same reference numerals will be omitted.

Referring to FIG. 14A, in the third region A3, an additional island substrate 1411 may be disposed on the lower substrate 610. That is, the additional island substrate 1411 is spaced apart from each other on the same layer as the island substrate 111 disposed in the first region A1 on the lower substrate 610. In addition, the top and bottom surfaces of the additional island substrate 1411 may be flat, and some top surfaces of the lower substrate 610 in contact with the additional island substrate 1411 may also be flat.

Further, the additional island substrate 1411 is for placing the additional LED 1460, and the additional island substrate 1411 may be rigid compared to the lower substrate 610. That is, the lower substrate 610 may have a softer characteristic than the additional island substrate 1411, and the additional island substrate 1411 may have a rigidity characteristic than the lower substrate 610.

The additional island substrate 1411, which is a rigid substrate, may be made of a plastic material having flexibility, for example, polyimide (PI), polyacrylate, polyacetate, or the like. It may be made of.

The modulus of the additional island substrate 1411 may be higher than the modulus of the lower substrate 610. Modulus is an elastic modulus that represents the ratio of deformation to stress with respect to the stress applied to the substrate, the hardness may be relatively high when the modulus is relatively high. Accordingly, the additional island substrate 1411 may be a plurality of rigid substrates having rigidity compared to the lower substrate 610. Modulus of the additional island substrate 1411 may be 1000 times greater than that of the lower substrate 610, but is not limited thereto.

The third connection pad 1441 and the fourth connection pad 1483 are disposed on the additional island substrate 1411.

The third connection pad 1441 electrically connects the third connection wire 683 and the additional LED 1460. In detail, the p-electrode 1465 and the third connection wire 683 of the additional LED 1460 are electrically connected by the third connection pad 1481.

The fourth connection pad 1483 electrically connects the additional LED 1460 and the common wiring CL. Although not specifically illustrated in FIG. 14A, the fourth connection pads 1483 are electrically connected to the common wiring CL, and the fourth connection pads 1483 in the third region A3 are added through the adhesive layer AD. Is connected to the LED 1460. Accordingly, the common electrode CL and the n electrode 1464 of the additional LED 1460 are electrically connected by the fourth connection pad 1483.

An additional LED 1460 is disposed on the third connection pad 1441 and the fourth connection pad 1483. The additional LED 1460 includes an n-type layer 1541, an active layer 1462, a p-type layer 1463, an n-electrode 1464, and a p-electrode 1465. The additional LED 1460 of the display device 1400 according to another embodiment of the present invention has a structure of a flip chip in which an n electrode 1464 and a p electrode 1465 are formed on one surface thereof.

The n-type layer 1541 may be formed by implanting n-type impurities into gallium nitride (GaN) having excellent crystallinity. The n-type layer 1541 may be disposed on a separate base substrate made of a material capable of emitting light.

The active layer 1462 is disposed on the n-type layer 1541. The active layer 1462 is a light emitting layer that emits light from the additional LED 1460 and may be formed of a nitride semiconductor, for example, indium gallium nitride (InGaN). The p-type layer 1463 is disposed on the active layer 1462. The p-type layer 1463 may be formed by implanting p-type impurities into gallium nitride (GaN).

As described above, the additional LED 1460 according to the exemplary embodiment of the present invention laminates the n-type layer 1541, the active layer 1462, and the p-type layer 1463 in sequence, and then etches a predetermined portion. and an n-electrode 1464 and a p-electrode 1465. In this case, the predetermined portion is a space for separating the n electrode 1464 and the p electrode 1465, and the predetermined portion is etched to expose a portion of the n-type layer 1462. In other words, the surfaces of the additional LEDs 1460 on which the n-electrodes 1464 and the p-electrodes 1465 are to be disposed may have different height levels rather than flattened surfaces.

As such, the n-electrode 1464 is disposed on the etched region, that is, the n-type layer 1541 exposed by the etching process. The n electrode 1464 may be made of a conductive material. On the other hand, the p-electrode 1465 is disposed on the non-etched region, that is, the p-type layer 1463. The p electrode 1465 may also be made of a conductive material. For example, the p electrode 1465 may be made of the same material as the n electrode 1464.

The adhesive layer AD is disposed between the top surface of the third connection pad 1441 and the fourth connection pad 1483 and the third connection pad 1441 and the fourth connection pad 1483, so that the additional LED 1460 is formed. The third connection pad 1441 and the fourth connection pad 1483 may be adhered to each other. In this case, the n electrode 1464 may be disposed on the fourth connection pad 1483, and the p electrode 1465 may be disposed on the third connection pad 1441.

The adhesive layer AD may be a conductive adhesive layer in which conductive balls are dispersed in an insulating base member. Thus, when heat or pressure is applied to the adhesive layer AD, the conductive balls may be electrically connected in a portion to which the heat or pressure is applied to have conductive properties, and the non-pressurized region may have insulating properties. For example, the n electrode 1464 may be electrically connected to the fourth connection pad 1483 through the adhesive layer AD, and the p electrode 1465 may be electrically connected to the third connection pad 1441 through the adhesive layer AD. Is connected. That is, after applying the adhesive layer (AD) on the third connecting pad (1481) and the fourth connecting pad (1483), such as by inkjet, the additional LED 1460 is transferred onto the adhesive layer (AD), the additional LED The third connection pad 1441 and the p-electrode 1465 and the fourth connection pad 1483 and the n-electrode 1464 may be electrically connected to each other by pressing and applying heat. However, the portion of the adhesive layer AD disposed between the n-electrode 1464 and the fourth connection pad 1483 and the portion of the adhesive layer AD disposed between the p-electrode 1465 and the third connection pad 1441 are disposed. The other part of the adhesive layer AD except the one has an insulating property. Meanwhile, the adhesive layer AD may be disposed on each of the third connection pad 1441 and the fourth connection pad 1483 in a separated form.

As described above, the stretchable display device 1400 according to another exemplary embodiment has a structure in which the additional LEDs 1460 are disposed in the third region A3 in which the sub additional pixels are disposed. When the display device 1400 is turned on, different voltage levels applied to each of the third connection pad 1441 and the fourth connection pad 1483 are transmitted to the n electrode 1464 and the p electrode 1465, respectively. Additional LED 1460 is emitted.

14B, when the stretchable display device 1400 is stretched, connection wirings 682 and 683 may be stretched together with the lower substrate 610. For example, as the lower substrate 610 is stretched, the second connection wiring 682 and the third connection wiring 683 formed in the uneven shape in the second region A2 and the third region A3 are stretched. It can be a straight shape.

However, even when the stretchable display device 1400 is stretched, the additional island substrate 1411 which is a rigid substrate is not stretched, and thus the additional LED 1460 itself disposed on the additional island substrate 1411 is not stretched. . Accordingly, no external force due to stretching is applied to the additional LEDs 1460, and thus the additional LEDs 1460 are not damaged due to the stretching of the stretchable display device 1400.

As described above, in the stretchable display device 1400, an additional LED 1460 may be disposed in an additional sub pixel. Since the additional LED 1460 is made of an inorganic material rather than an organic material, the additional LED 1460 is excellent in reliability and has a long life compared to the liquid crystal display device or the organic light emitting device. In addition, the additional LED 1460 is not only fast, but also has low power consumption, high impact resistance, high stability, and high luminous efficiency, so that a high brightness image can be displayed. to be. In particular, since the additional LED 1460 is made of an inorganic material rather than an organic material, an encapsulation layer required when using an organic light emitting device may not be used. As a result, the encapsulation layer, which may be damaged, may be omitted in the process of stretching the stretchable display device. Therefore, in the stretchable display device according to still another embodiment of the present invention, the additional LED 1460 is used as a light emitting device, and thus, the use of an encapsulation layer that may be damaged when the stretchable display device is deformed, such as bending or stretching. Can be omitted. In addition, since the additional LED 1460 is made of an inorganic material rather than an organic material, the light emitting device of the stretchable display device according to another exemplary embodiment of the present invention may be protected from moisture or oxygen, and may have excellent reliability. have.

15 is a schematic cross-sectional view of a subpixel of a stretchable display device according to still another embodiment of the present invention. The stretchable display device 1500 illustrated in FIG. 15 is substantially the same except that the second transistor 1550 ′ is added as compared to the stretchable display device 1400 illustrated in FIGS. 14A and 14B. The duplicate description is omitted.

Referring to FIG. 15, the buffer layer 112 may include a second gate electrode 1551 ′, a second active layer 1552 ′, a second source electrode 1553 ′, and a second drain electrode 1554 ′. Two transistors 1550 'are formed. For example, a second active layer 1552 'is formed on the buffer layer 112, and the second active layer 1552' and the second gate electrode 1551 'are formed on the second active layer 1552'. A gate insulating layer 113 for insulating is formed. An interlayer insulating layer 114 is formed to insulate the second gate electrode 1551 ′, the second source electrode 1553 ′, and the second drain electrode 1554 ′, and a second interlayer insulating layer 114 is formed on the interlayer insulating layer 114. A second source electrode 1553 'and a second drain electrode 1554' are formed in contact with the active layer 1552 ', respectively.

The planarization layer 115 is formed on the first transistor 150, the second transistor 1550 ′, and the interlayer insulating layer 114. The planarization layer 115 planarizes the upper portion of the first transistor 150 and the second transistor 1550 ′. The planarization layer 115 may include a contact hole for electrically connecting the first transistor 150 and the first connection pad 1381, and a contact hole for electrically connecting the data pad 173 and the first source electrode 153. And a contact hole for connecting the second drain electrode 1554 ′ and the third connection wire 683.

In some embodiments, a passivation layer may be formed between the first transistor 150 and the second transistor 1550 ′ and the planarization layer 115. That is, a passivation layer covering the first transistor 150 and the second transistor 1550 ′ may be formed to protect the first transistor 150 and the second transistor 1550 ′ from penetration of moisture, oxygen, or the like. have. The passivation layer may be made of an inorganic material, but may be made of a single layer or a multilayer, but is not limited thereto.

Referring to FIG. 15, an additional LED 1460 connected to the second transistor 1550 ′ is disposed in the third region A3 of the lower substrate 610 through the third connection line 683. The additional LED 1460 disposed on the additional island substrate 1411 and the LED 160 disposed on the plurality of island substrates 111 may be connected to different transistors to perform independent driving.

The additional sub-pixels ASPX1, ASPX2, and ASPX3 of the stretchable display device 1500 according to the exemplary embodiment of the present invention may be divided into the sub-pixels SPX1, SPX2, and SPX3 disposed on the plurality of island substrates 111. Are connected to different circuits. Accordingly, in the stretchable display device 1500 according to another exemplary embodiment of the present invention, the additional subpixels ASPX1, ASPX2, and ASPX3 are independently driven to increase the resolution of the subpixels ASPX1, ASPX2, and ASPX3. Can be.

Exemplary embodiments of the invention may be described as follows.

In order to solve the above problems, a plurality of pixels including a plurality of sub-pixels according to an exemplary embodiment of the present invention are defined, and a plurality of island substrates and island islands that are adjacent to each other among the plurality of island substrates are spaced apart from each other. Connection wirings for electrically connecting the pads disposed thereon, and a plurality of first regions in which a plurality of island substrates are disposed, a plurality of second regions in which the connection wirings are disposed, and a region other than the plurality of first regions and the plurality of second regions. And a lower substrate in which a plurality of third regions in which a plurality of additional pixels including a plurality of additional sub pixels are defined are defined.

According to another feature of the present invention, the modulus of the plurality of second regions and the plurality of third regions of the lower substrate may be smaller than the modulus of the plurality of island substrates.

According to another feature of the invention, each of the plurality of third regions may be an area surrounded by the plurality of first regions and the plurality of second regions.

According to another feature of the invention, the upper surface of the plurality of first regions of the lower substrate is flat, the flesh surface of the plurality of second regions of the lower substrate has an uneven shape, the upper surface of the third region of the lower substrate is uneven It may have a shape.

According to another feature of the invention, it may further include an additional light emitting device disposed on the plurality of third regions of the lower substrate.

According to another feature of the invention, further comprising an additional island substrate disposed on the plurality of third regions of the lower substrate, the additional light emitting device may be an additional LED disposed on the additional island substrate.

According to another feature of the invention, the additional light emitting device is an additional organic light emitting device, the anode, the organic light emitting layer and the cathode of the additional organic light emitting device, the anode, the organic light emitting layer and the organic light emitting device having a shape corresponding to the uneven shape The cathode may have a shape corresponding to the uneven shape.

According to another feature of the invention, the connection wiring may have a shape corresponding to the uneven shape.

According to still another feature of the present invention, the organic light emitting diode display may further include a plurality of organic light emitting diodes disposed in the plurality of subpixels, and a plurality of additional organic light emitting diodes disposed in the plurality of additional subpixels. The anode of the organic light emitting device and the anode of the first additional organic light emitting device among the plurality of additional organic light emitting devices may be configured to apply the same voltage.

According to another feature of the invention, the anode of the first organic light emitting device and the anode of the first additional organic light emitting device may be integrally formed.

According to another feature of the present invention, a plurality of island substrates are disposed on an island substrate on which the first organic light emitting element is disposed, and the same voltage is applied to the anode of the first organic light emitting element and the anode of the first additional organic light emitting element. It may further include a transistor.

According to still another feature of the present invention, the organic light emitting diode display may further include a plurality of organic light emitting diodes disposed in the plurality of subpixels, and a plurality of additional organic light emitting diodes disposed in the plurality of additional subpixels. The additional organic light emitting element can be configured to be driven independently.

According to still another aspect of the present invention, a first transistor is connected to an anode of a first organic light emitting element among a plurality of organic light emitting elements, and is disposed on an island substrate having a first organic light emitting element among the plurality of island substrates, and a plurality of organic light emitting elements. The second organic light emitting diode may further include a second transistor connected to an anode of the first additional organic light emitting diode and disposed on the same island substrate as the first transistor.

According to another feature of the present invention, the method further includes a plurality of LEDs disposed in the plurality of sub pixels and a plurality of additional LEDs disposed in the plurality of additional sub pixels, wherein one electrode of the first LED and the plurality of LEDs of the plurality of LEDs are further included. The same voltage may be applied to one electrode of the first additional LED of the additional LEDs.

According to another feature of the present invention, a stretchable display device is disposed on an island substrate on which the first LED is disposed among a plurality of island substrates, and is disposed on one electrode of the first LED and one electrode of the first additional LED. It may further include a transistor for applying the same voltage.

According to still another feature of the present invention, the apparatus further includes a plurality of LEDs disposed in the plurality of sub pixels and a plurality of additional LEDs disposed in the plurality of additional sub pixels, wherein the plurality of LEDs and the plurality of additional LEDs are independently driven. It may be configured to.

According to another feature of the present invention, a stretchable display device includes: a first transistor connected to one electrode of a first LED among a plurality of LEDs and disposed on an island substrate on which the first LED is disposed among a plurality of island substrates; The display device may further include a second transistor connected to one electrode of the first additional LED among the plurality of additional LEDs and disposed on the same island substrate as the first transistor.

According to still another feature of the present disclosure, the semiconductor device may further include an encapsulation layer disposed to cover the plurality of additional pixels in the plurality of third regions, and the encapsulation layer may be formed of an encapsulation material having stretching characteristics.

According to another feature of the invention, it may further include an upper substrate disposed on the plurality of island substrate to correspond to the lower substrate.

According to another exemplary embodiment, a stretchable display device includes a plurality of pixels including a plurality of sub pixels, a plurality of rigid substrates spaced apart from each other, a lower substrate disposed under a plurality of rigid substrates, and a plurality of pixels. A connection wiring for electrically connecting pads disposed on adjacent rigid substrates among the rigid substrates, and a lower substrate having a second region other than the first light emitting region in which the rigid substrate is disposed and the flexible region in which the connection wiring is disposed; It may include a plurality of additional pixels disposed in the emission area.

According to another feature of the present invention, the upper surface of the first emission region of the lower substrate may be flat, and the upper surface of the flexible region and the second emission region of the lower substrate may have an uneven shape.

According to another feature of the invention, further comprising an additional organic light emitting element disposed on the second light emitting region of the lower substrate, the anode, the organic light emitting layer and the cathode of the additional organic light emitting element may have a shape corresponding to the uneven shape. have.

According to still another feature of the present invention, the semiconductor device may further include an encapsulation layer disposed to cover the plurality of additional pixels in the second emission region, and the encapsulation layer may be formed of an encapsulation material having an elongation characteristic.

Although the embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100, 400, 600, 800, 1000, 1200: stretchable display device
110, 410, 610: lower substrate
120: upper substrate
111: island substrate
112: buffer layer
113: gate insulating layer
114: interlayer insulation layer
115: planarization layer
116, 616 bank
117, 1017: encapsulation layer
1017a: first encapsulation layer
1017b: second encapsulation layer
118: adhesive layer
130: COF
131: base film
132: drive IC
140: printed circuit board
150: first transistor
151: first gate electrode
152: first active layer
153: first source electrode
154: first drain electrode
850 ', 1550': second transistor
851 ', 1551': second gate electrode
852 ', 1552': second active layer
853 ', 1553': second source electrode
854 ', 1554': second drain electrode
160: organic light emitting device
161: anode
162: organic light emitting layer
163: cathode
660 ': additional organic light emitting device
661 ': Additional anode
662 ': additional organic light emitting layer
663 ': additional cathode
171: gate pad
172: connection pad
173: data pad
180, 480, 680: connection wiring
181, 481, 681: first connection wiring
182, 482, 682: second connection wiring
683, 883: third connection wiring
684, 884: fourth connection wiring
190: polarizing layer
A1: first area
A2: second area
A3: third area
PX: Pixel
SPX1: first sub pixel
SPX2: second sub-pixel
SPX3: third sub-pixel
APX: additional pixels
ASPX1: first additional sub-pixel
ASPX2: second additional sub-pixel
ASPX3: third additional sub-pixel
1360: LED
1460: additional LEDs
1361, 1461: n-type layer
1362, 1462: active layer
1363, 1463: p-type layer
1364, 1464: n electrode
1365, 1465: p electrode
1381: first connection pad
1383: second connection pad
1481: third connection pad
1483: fourth connection pad

Claims (25)

A plurality of island substrates including a plurality of pixels including a plurality of sub pixels and spaced apart from each other;
Connecting wirings for electrically connecting pads disposed on adjacent island substrates of the plurality of island substrates; And
A plurality of first regions in which the plurality of island substrates are disposed, a plurality of second regions in which the connection wirings are disposed, and regions except for the plurality of first regions and the plurality of second regions, and include a plurality of additional subpixels. And a lower substrate on which a plurality of third regions in which a plurality of additional pixels are defined are defined.
The method of claim 1,
The modulus of the plurality of second regions and the plurality of third regions is smaller than the modulus of the plurality of island substrates.
The method of claim 1,
Each of the plurality of third regions is an area surrounded by the plurality of first regions and the plurality of second regions.
The method of claim 1,
Top surfaces of the plurality of first regions of the lower substrate are flat,
Upper surfaces of the plurality of second regions of the lower substrates have an uneven shape,
At least a portion of upper surfaces of the plurality of third regions of the lower substrate have a concave-convex shape.
The method of claim 4, wherein
The display device of claim 1, further comprising additional light emitting devices on the plurality of third regions of the lower substrate.
The method of claim 5,
Further comprising an additional island substrate disposed on the plurality of third regions of the lower substrate,
The additional light emitting device is an additional LED disposed on the additional island substrate.
The method of claim 5,
The additional light emitting device is an additional organic light emitting device,
The anode, the organic light emitting layer, and the cathode of the additional organic light emitting diode have a shape corresponding to the uneven shape.
The method of claim 4, wherein
The connecting line has a shape corresponding to the uneven shape.
The method of claim 1,
A plurality of organic light emitting elements disposed in the plurality of sub-pixels; And
Further comprising a plurality of additional organic light emitting device disposed in the plurality of additional sub-pixels,
An anode of a first organic light emitting element among the plurality of organic light emitting elements and an anode of the first additional organic light emitting element among the plurality of additional organic light emitting elements are configured to apply the same voltage.
The method of claim 9,
The anode of the first organic light emitting element and the anode of the first additional organic light emitting element are integrally formed.
The method of claim 9,
A transistor disposed on an island substrate on which the first organic light emitting element is disposed among the plurality of island substrates, the transistor further configured to apply the same voltage to an anode of the first organic light emitting element and an anode of the first additional organic light emitting element; , Stretchable display device.
The method of claim 1,
A plurality of organic light emitting elements disposed in the plurality of sub-pixels; And
Further comprising a plurality of additional organic light emitting device disposed in the plurality of additional sub-pixels,
And the plurality of organic light emitting elements and the plurality of additional organic light emitting elements are driven independently.
The method of claim 12,
A first transistor connected to an anode of a first organic light emitting element among the plurality of organic light emitting elements, and disposed on an island substrate on which the first organic light emitting element is disposed among the plurality of island substrates; And
And a second transistor connected to an anode of a first additional organic light emitting element among the plurality of additional organic light emitting elements, and disposed on the same island substrate as the first transistor.
The method of claim 1,
A plurality of LEDs disposed in the plurality of sub-pixels; And
Further comprising a plurality of additional LEDs disposed in the plurality of additional sub-pixels,
A stretchable display device configured to apply the same voltage to one electrode of a first LED of the plurality of LEDs and one electrode of a first additional LED of the plurality of additional LEDs.
The method of claim 14,
And a transistor disposed on an island substrate on which the first LED is disposed among the island substrates, and applying a same voltage to one electrode of the first LED and one electrode of the first additional LED. Display device.
The method of claim 1,
A plurality of LEDs disposed in the plurality of sub-pixels; And
Further comprising a plurality of additional LEDs disposed in the plurality of additional sub-pixels,
And the plurality of LEDs and the plurality of additional LEDs are configured to be driven independently.
The method of claim 16,
A first transistor connected to one electrode of a first LED of the plurality of LEDs and disposed on an island substrate on which the first LED is disposed among the plurality of island substrates; And
And a second transistor connected to one electrode of the first additional LED among the plurality of additional LEDs and disposed on the same island substrate as the first transistor.
The method of claim 1,
The semiconductor device may further include an encapsulation layer disposed to cover the plurality of additional pixels in the plurality of third regions.
The encapsulation layer is formed of an encapsulating material having stretching characteristics.
The method of claim 1,
And an upper substrate disposed on the plurality of island substrates to correspond to the lower substrate.
A plurality of rigid substrates including a plurality of pixels including a plurality of sub pixels, and spaced apart from each other;
A lower substrate disposed under the plurality of rigid substrates;
A connection wire electrically connecting pads disposed on adjacent rigid substrates among the plurality of rigid substrates,
And the lower substrate includes a plurality of additional pixels disposed in a first light emitting region in which the rigid substrate is disposed and a second light emitting region, which is a region other than a wiring region in which the connection wiring is disposed.
The method of claim 20,
An upper surface of the first emission region of the lower substrate is flat,
The upper surface of the flexible region of the lower substrate has a concave-convex shape,
At least a portion of an upper surface of the second emission area of the lower substrate has a concave-convex shape.
The method of claim 21,
And a further light emitting element disposed on the second light emitting region of the lower substrate.
The method of claim 22,
Further comprising an additional island substrate disposed on the second light emitting region of the lower substrate,
The additional light emitting device is an additional LED disposed on the additional island substrate.
The method of claim 22,
The additional light emitting device is an additional organic light emitting device,
The anode, the organic light emitting layer, and the cathode of the additional organic light emitting diode have a shape corresponding to the uneven shape.
The method of claim 20,
An encapsulation layer disposed to cover the plurality of additional pixels in the second emission region,
The encapsulation layer is formed of an encapsulating material having stretching characteristics.

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