WO2020013511A1

WO2020013511A1 - Display device using surface-modified, detachment/attachment layer

Info

Publication number: WO2020013511A1
Application number: PCT/KR2019/008112
Authority: WO
Inventors: 김영수
Original assignee: 김영수
Priority date: 2018-07-09
Filing date: 2019-07-03
Publication date: 2020-01-16

Abstract

Disclosed is a display device using a surface-modified, detachment/attachment layer that can freely control adhesiveness for detachment and attachment, allow easy removal of bubbles therefrom, and be stably attached without being limited to shapes. The device comprises: a target to be attached by an adherend, and a detachment/attachment controlling layer positioned on either of the target and the adherend, wherein the detachment/attachment controlling layer includes a detachment/attachment layer and a surface-modified pattern arranged on detachment/attachment layer and inclusive of any one of a plasma pattern, a corona pattern, and a combination thereof.

Description

Display device using surface-modified removable layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device that can be detachably attached to a curved surface and a plane using a detachable layer having a modified surface.

In the display device, a display such as a liquid crystal display (LCD), an organic light emitting diode (OLED), a micro LED, and an electrophoresis (EPD) forms a screen. Displays are widely used in mobile devices such as mobile phones, smartphones and tablets, or in information processors such as ATMs and kiosks. Display devices are employed in portable devices with various functions. In such a portable device, an attachment material such as a protective sheet (protective film or protective glass), a window, a circuit board, a touch screen, a rear cover, and the like is detached from the adherend. For example, the protective sheet as an attachment may be a window as an adherend, the window as an attachment is a touch screen as an adherend, the touch screen as an attachment is a display as an adherent, and the back cover as an attachment may be detachable to a display as an adherend.

On the other hand, the attachment material such as a protective sheet (protective film or protective glass), a window, a circuit board, a touch screen, a back cover, and the like need to be freely attached to and attached to the adherend. Because the attachment material is damaged and reattached, the disassembling and reassembling of the display device is too complicated and expensive, and causes environmental problems such as the generation of electronic waste. At present, only the protective sheet is detachable, but such detachment may be extended to the entire attachment material. Even if the detachment is extended to the whole, the problem disclosed above still exists.

The foldable and rollable display devices (hereinafter, flexible display devices), which are recently becoming an issue, can be folded or rolled up, which is structurally fragile, easily broken, and easily scratched. In a flexible display device, for example, the reproduction of the window due to breakage and scratching of the window is more complicated than the reproduction of a flat, 2.5D, curved display device. The window regeneration is more expensive and requires a large amount of electronic waste generation and processes harmful to the human body. Accordingly, the role and function of the protective sheet in the flexible display device is important. However, when the conventional protective sheet is used, the folding part and the rollable display device are detached from the start part, the edge, the end part, or the like.

In order to solve this problem, by attaching a protective sheet coated with a strong adhesive, the lifting or bubble generation of the protective sheet can be reduced. However, a strong adhesive protective sheet is difficult to attach without bubbles, but less bubbles. In addition, if a scratch or damage occurs in the attached protective sheet, it takes a separate process and cost to remove it, and must go through a process that generates a large amount of electronic waste and harmful to the human body. If the protective sheet is forcibly removed, damage to the flexible display device itself may occur. When using a soft protective sheet or an adhesive with low adhesive strength, such as TPU of Korea Patent Publication No. 2009-0021013, it is difficult to detach and detach due to air bubbles, and the protection function is remarkably inferior. Accordingly, in order to smoothly attach and detach the protective sheet, a detachable layer having an appropriate adhesive force is required.

In the above description, but limited to the protective sheet, for a smooth detachable detachable layer having a suitable adhesive force can be applied to all the attachment to enlarge. For example, the window as the attachment material should be easily detachable without detachment or bubbles from the touch screen as the attachment material. In addition, the attachment material should be detachably attached regardless of whether the shape of the adherend is curved or flat.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display device using a surface-modified detachable layer that is freely controlled according to a position and stably attached regardless of a shape.

One example of a display device using a surface-modified detachable layer for solving the problems of the present invention includes an adherent to which an adherent is attached and a detachable adjustment layer positioned on either the adherent or the adherent. In this case, the desorption control layer is disposed on the desorption layer and the desorption layer, and consists of a surface modification pattern made of any one of a plasma pattern or a corona pattern or a combination thereof.

In one example of the present invention, the attaching material may be at least one selected from a module element or a protective sheet constituting the display device. The adherend may be at least one selected from a module element or a protective sheet constituting the display device. The adherend may have a flat or curved surface or a combination thereof. The adherend may be foldable, rollable, or flexible. The detachable layer may be formed of any one of a coating and a sheet. The pattern arrangement of the surface modification pattern may be in the form of a band, a grid, an island, a fence or a combination thereof.

In one example of the present invention, the plasma pattern may be formed by treating the detachable layer with any one selected from atmospheric pressure plasma, reduced pressure plasma, or corona plasma. The corona pattern may be formed by surface oxidation of the detachable layer to express a polar group.

In one preferred embodiment of the present invention, the surface modification pattern may be further added to the deposition pattern. The deposition pattern is titania (TiO ₂ ) or silica (SiO ₂ ) or gold (Au), silver (Ag), platinum (Pt), silicon (Si), copper (Cu), palladium (Pd), nickel (Ni) , Tungsten (W), iron (Fe), cobalt (Co), titanium (Ti), chromium (Cr), manganese (Mn), zinc (Zn), zirconium (Zr), molybdenum (Mo), iridium (Ir) , A single layer or a multi-layer deposition layer made of at least one of ruthenium (Ru), tantalum (Ta), or an alloy thereof or an oxide thereof, or a layer containing a fluorine resin or a silicon resin on the deposition layer may be located. Can be.

Another example of a display device using a surface-modified detachable layer for solving the problems of the present invention includes an adherent to which an adherent is attached and a detachable adjustment layer positioned on either the adherent or the adherent. In this case, the desorption control layer is disposed on the desorption layer and the desorption layer, and consists of a surface modification pattern consisting of a deposition pattern.

According to the display device using the surface-modified detachable layer of the present invention, by providing a detachable adjusting layer that has undergone plasma, corona, and deposition treatment, the adhesive force can be freely controlled depending on the position in the detachable process to stably attach regardless of the shape. . In addition, by providing a pattern to the detachable adjusting layer, the adhesive force can be more freely adjusted depending on the position.

1 is a cross-sectional view illustrating a first display device according to the present invention.

2 is a cross-sectional view for describing a second display device according to the present invention.

3 is a plan view showing examples of the surface modification pattern applied to the display device according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. In addition, in the drawings, the thicknesses of films (layers, patterns) and regions may be exaggerated for clarity. Also, if a film (layer, pattern) is mentioned as being in the 'top', 'top', 'bottom', 'one side' of another film (layer, pattern), it is formed directly on the other film (layer, pattern) Or other films (layers, patterns) may be interposed therebetween.

Embodiments of the present invention provide a display device which is stably attached regardless of a shape by freely adjusting an adhesive force according to a position by providing a detachable adjusting layer that has undergone plasma, corona, and deposition processes. To this end, the structure of the detachable control layer will be described in detail, and the process of adjusting the adhesion with the adherend through the detachable control layer will be described in detail. The present invention refers to attaching and detaching an attachment material, which is an element having a display device, to an adherend, which is an element having a display device. Although the protective sheet is currently attached to and detached from the window, an embodiment of the present invention extends the detachment to all elements having a display device. Hereinafter, the adhesive force refers to the bonding force of the detachable control layer and the adhesion control layer itself, and the adhesive force refers to the bonding force considering the relationship between the adhesive material and the adherend.

The display device applied to the embodiment of the present invention refers to a mobile device, an information processing terminal, a television, and the like. The mobile device may be a mobile phone, a smartphone, a tablet, or the like, and the information processing terminal may be an ATM or a kiosk. The display device may include a flat or flat but curved surface and may be flexible. The image processing device essentially includes a window, a touch screen, and a display. The window is a window for all image processing devices such as a window of a mobile device, a window of an information processing terminal, and a television. Likewise, the touch screen and the display also refer to the touch screen and the display applied to all image processing devices.

The display device may be flat, curved, or a mixture thereof. According to the shape of the window, the display device has been developed into 2D (planar), 2.5D (front edge curved surface, back plane), and 3D (curved surface, edge). Recently, a foldable display device that can be folded or unfolded and a rollable display device that can be wound have emerged. The foldable and rollable display device is a kind of flexible display device. The display device applied to the embodiment of the present invention includes both flat or curved surfaces or a mixture thereof, such as 2D, 2.5D, 3D, and flexible.

The display device of the present invention basically includes a display, a touch screen, and a window, and a touch screen cover layer may be attached to the touch screen. In addition, the touch screen cover layer may be a polarizing film may take its role, and a rear cover may be attached to the opposite side of the window with respect to the display. Accordingly, the module elements constituting the display device of the present invention essentially include a display, a touch screen, and a window, and may optionally include at least one of a touch screen cover layer, a polarizing film, and a rear cover.

Of course, within the scope of the present invention, additional components, such as printing films, may be further added to the display device. In addition, the display device may be complex, such as a window printed or coated on the back, a window incorporating a polarizing film on the back, and a window in which a touch screen and a polarizing film are integrated on the back. As described above, the display, the touch screen, the window, the touch screen cover layer, the polarizing film, the rear cover, and other additional components, and all of them, are collectively referred to as a module element constituting the display device. The protective sheet is a protective film made of a polymer film, a protective glass utilizing tempered glass, or a combination thereof. The protective sheet is attached to the window of the display device to prevent the window from being broken or scratching. Accordingly, the protective sheet is called an additional element added to the display device.

1 is an exploded cross-sectional view illustrating a first display device 100 according to an exemplary embodiment of the present invention. However, the drawings are not strictly expressed and may have components that are not shown in the drawings for the convenience of description.

Referring to FIG. 1, the first display device 100 includes an attaching material 10 and an attaching material 30, and the attaching material 10 is attached to the attaching material 30 by using the detachable adjusting layer 20. Attached. Attachment 10 and the adherend 30 is any one selected from the above-described module element. One surface of the attachment material 10 may be a surface-adhesive detachment control layer 20 according to an embodiment of the present invention. In some cases, the surface-adhesive detachment control layer 20 may be located on one surface of the adherend 30. In other words, the adhesive 10 and the adherend 30 is determined according to the position of the removable control layer 20. In the figure, a case where the detachable adjusting layer 20 is located on one surface of the adhesive material 10 is shown.

The protective sheet includes a transparent substrate, and when the transparent substrate is made of tempered glass, a scattering prevention film for preventing the scattering of the tempered glass is provided. The transparent substrate and the window of the protective sheet can be used without limitation as long as it is a transparent material. For example, it may include a glass substrate or a plastic substrate. Specifically, the glass substrate may be tempered glass, and the plastic substrate may be polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), polyimide (PI), polyarylate (PAR), polycarbonate (PC), or PMMA (PMMA). polymethyl methacrylate) or COC (cycloolefin copolymer) may include any one or more than one. The window may also be a laminated structure in which a tempered glass and a plastic substrate are formed in multiple layers.

The window may be transparent or have a printed layer expressing various functions. The printing layer may be applied to any one or any one or more coating, such as transparent, translucent or color. The print layer may be formed by inkjet printing using silk printing or UV or inkjet printing or transfer using thermosetting. The transparent substrate and the window may be formed with a functional coating layer having characteristics such as shielding, antireflection, blue light blocking, electromagnetic wave blocking, privacy, and the like. The functional coating layer may be formed by a dry coating such as wet coating and deposition by applying a coating liquid.

The touch screen is a conductive pattern formed on one side or both sides of the insulating layer made of metal oxide or plastic. The conductive pattern is mainly applied to a metal oxide, and the metal oxide includes ITO, ATO, ZnO, or Cu, conductive polymer or silver nanowire. The touch screen cover layer prevents the touch screen from being damaged by impact or contamination. The cover layer may be used without limitation as long as it is a transparent material. For example, it may include a glass substrate or a plastic substrate. Specifically, the glass substrate may be tempered glass or non-tempered glass, and the plastic substrate may also be polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), polyimide (PI), polyarylate (PAR), PC (polycarbonate), PMMA (polymethyl methacrylate) or COC (cycloolefin copolymer) may include any one or more. Plastic substrates are more preferred. The thickness of the cover layer may be sufficient so that the touch screen is not damaged in the process of using the first device 100.

The polarizing film is a film having a property of passing or blocking vertical or horizontal polarization of incident light. It is an optical film used for thin-film transistor liquid crystal display devices (TFT-LCD) such as notebook computers and monitors, filters for camera special effects, stereoscopic glasses, and OLED visibility improvement. For example, the intensity of light emitted from the backlight of the LCD module is uniform in all directions, but the polarizing film transmits only the light oscillating in the same direction as the polarization axis, and absorbs or reflects the light in the specific direction. It plays a role in making polarization. When the polarization passes the LCD liquid crystal, the brightness of the pixel is changed by electrically adjusting the alignment direction of the liquid crystal for each pixel.

The display includes a liquid crystal display (LCD), a light emitting diode (LED), an organic light emitting diode (OLED), a micro LED, an electrophoretic display (EPD), and also uses quantum dots. The rear cover is disposed on the opposite side of the window to protect the display, and may be made of transparent tempered glass, opaque plastic, or the like. The rear cover is disposed opposite the window to protect the display, and a material such as transparent tempered glass and opaque plastic is applied.

The detachable adjustment layer 20 includes a detachable layer 21 and a surface modification pattern 22. The detachable layer 21 can be produced by coating. In the case of the coating, an adhesive or a mixture thereof or a copolymer thereof in which a thermosetting resin or a thermosetting resin UV curable resin, which is an acrylic polymer, a silicone polymer or a urethane polymer, and a crosslinking agent is mixed. In some cases, functional materials such as silica gel, nanoparticles, and an antistatic agent may be mixed with the detachable layer 21 to improve physical properties of the detachable layer 21. Further, the optical properties may be improved by adding particles forming a quantum dot to the detachable layer 21.

The detachable layer 21 may be implemented in the form of a sheet rather than a coating. For example, (a) a (meth) acrylic acid ester monomer having a hydrocarbon group having 1 to 12 carbon atoms, (b) a hydroxyl group-containing (meth) acrylic acid ester monomer, a monomer having an (c) amide group, and (d) a vinyl ester There exists an acryl-type high molecular compound copolymerized with the monomer component containing a type | system | group monomer, resin acid value is 0.1 mgKOH / g or less, and dielectric constant is used for the adhesive composition for 3-6 touch panels. In addition, there are light-transmitting pressure-sensitive adhesive sheets and cross-linked silicone type adhesive sheets, which are characterized by being silicone gels.

The desorption layer 21 is a sheet composed of an acrylic polymer having a specific molecular weight containing no alkoxyalkyl acrylate as the main monomer and an adhesive composition containing a crosslinking agent, and a solid content ratio, wherein the (meth) acrylic resin is 65 to 85% by mass. And 10 to 30% by mass of polyoxyalkylene polyol, 1.0 to 5.0% by mass of polyisocyanate, and 0.005 to 0.1% by mass of tin catalyst, and have an acid value of 0 to 5 mgKOH / g, (meth) acrylic The transparent adhesive sheet etc. whose weight average molecular weights of resin are 100,000-600,000, and the number average molecular weight of (B) polyoxyalkylene polyol are 500-1500 are mentioned. Furthermore, hydrogel type sheets are possible.

The detachable layer 21 may be variously modified within the scope of the present invention in addition to the above-described examples. In detail, the detachable layer 21 may be formed of a material in which the adhesion force changes well by plasma treatment or corona treatment. In addition, the adhesive force of the detachable layer 21 can be set within the range of 0.1 gf / 25mm to 1500 gf / 25mm. The adhesion of the detachment control layer 20 of the present invention considers the adhesion of the detachable layer 21 and the surface modification pattern 22 in a combined state. Adhesion of the preferred detachable layer 21 is preferably 0.1gf / 25mm to 1,500gf / 25mm. For example, when adhesion force 500gf / 25mm is required in a part of the detachment control layer 20, the adhesion force of the surface modification pattern 22 may be increased by implementing the 500gf / 25mm even if the adhesion force of the detachment layer 21 is lower than 500gf / 25mm. .

The surface modification pattern 22 is at least one of the plasma pattern 22a, the corona pattern 22b, or the deposition pattern 22c. Specifically, the surface modification pattern 22 may be made of only the plasma pattern 22a, may be made of only the corona pattern 22b, and may be made of only the deposition pattern 22c. The surface modification pattern 22 may be made of a combination of the plasma pattern 22a and the corona pattern 22b, may be made of a combination of the corona pattern 22b and the deposition pattern 22c, and may be formed of the plasma pattern 22a and the deposition. It may be made of a combination of patterns 22c. In addition, as shown in the drawing, the surface modification pattern 22 may include all of the plasma pattern 22a, the corona pattern 22b, and the deposition pattern 22c.

In the case of the plasma pattern 22a, plasma methods such as atmospheric pressure plasma, reduced pressure plasma, and corona plasma are used. That is, in order to improve the adhesion of the detachable layer 21, not only chemically cleaning the surface, but also activating the surface to remove the organic matter of the surface by chemical reaction and physical reaction. The desorption layer 21 subjected to the plasma treatment changes chemical bonds in a region within several micrometers from the surface by using high energy of ions or electrons. In addition, a certain thickness of the surface is scraped off to increase the contact angle. The surface of the removable layer 21 is chemically or physically activated to react well with other materials. The surface modification such as plasma treatment is performed such as surface cleaning such as removal of fine foreign substances, modification of surface roughness, formation of polar functional groups, and the like.

In the case of the corona pattern 22b, the adhesion of the surface of the detachable layer 21 to be processed is improved by using a corona discharge technique. When the detachable layer 21 is treated with corona, the surface of the film is oxidized because the charged particles in the corona collide with the film surface. Therefore, the surface energy of the film is increased by the polar groups generated by the surface oxidation, such as C = O, COH, COOH, -COO-, -CO-, so that the affinity with the conductive polymer material is improved and the adhesion of the film is improved. Will be. In addition, the corona treatment may form a crosslinked structure between the polymer molecules in addition to the chemical polar groups as described above, thereby improving adhesion. In the corona surface treatment, the detachable layer 21 is typically positioned between the two electrodes where the corona discharge is made, and the corona discharge is generated by supplying a constant power to both electrodes, and the adhesive force on the surface is 0.1gf / 25mm to 1000gf / 25mm. Surface modification.

For the deposition pattern 22c, gold (Au), silver (Ag), platinum (Pt), silicon (Si), copper (Cu), palladium (Pd), nickel (Ni), tungsten (W), iron ( Fe), cobalt (Co), titanium (Ti), chromium (Cr), manganese (Mn), zinc (Zn), zirconium (Zr), molybdenum (Mo), iridium (Ir), ruthenium (Ru), tantalum ( Ta) or an alloy thereof or an oxide thereof, or a single layer or multiple layers. The deposition pattern 22c is deposited to an angstrom thickness and generally increases adhesion to the detachable layer 21. In order to form the deposition pattern 22c, the masking method may be used, but is not limited thereto.

The plasma pattern 22a, the corona pattern 22b, and the deposition pattern 22c have different adhesive strengths because of different mechanisms. In terms of adjusting the adhesive force, the plasma pattern 22a, the corona pattern 22b, and the deposition pattern 22c have the same function. However, the plasma pattern 22a, the corona pattern 22b, and the deposition pattern 22c each have different characteristics in terms of adhesion. The present invention is to control the adhesion of the detachable control layer (20). To this end, the adhesive force of each of the plasma pattern 22a, the corona pattern 22b, and the deposition pattern 22c is used. Accordingly, the plasma pattern 22a, the corona pattern 22b, and the deposition pattern 22c are not considered to be equal to each other. In other words, the combination of the detachable layer 21 and the plasma pattern 22a, the detachable layer 21 and the corona pattern 22b, and the detachable layer 21 and the deposition pattern 22c has different adhesive strengths.

Proper combination of the plasma pattern 22a, corona pattern 22b, and deposition pattern 22c frees the adhesive force according to the position of the detachment control layer 20 so that detachment is easily performed regardless of the plane and curved shapes. I can regulate it. However, in the case of the deposition pattern 22c, a separate deposition apparatus for deposition and a deposition process according thereto should be provided. Therefore, the deposition pattern 22c may be selectively applied in comparison with the plasma pattern 22a and the corona pattern 22b in consideration of cost. have. That is, if sufficient adhesive force can be obtained by the plasma pattern 22a, the corona pattern 22b, or a combination thereof, the vapor deposition pattern 22c does not have to be used. Accordingly, the surface modification pattern 22 is more preferably a plasma pattern 22a or a corona pattern 22b or a combination thereof.

2 is an exploded cross-sectional view illustrating a second display device 200 according to an exemplary embodiment of the present invention. In this case, the second display device 200 is the same as the first display device 100 except that the adhesive control layer 31 is included. Accordingly, detailed description of the same reference numerals will be omitted.

According to Figure 2, the adhesion control layer 31 may have a single layer or a pattern form. In the case of the single layer, in order to reduce adhesion by increasing the contact angle, titania (TiO ₂ ) or silica (SiO ₂ ) is deposited on the adherend 30 in order to provide anti-fingerprint, anti-fouling, and slip properties. After the fluorine-based resin, the silicon-based resin, or a mixture thereof may be coated on the deposited adherend 30. In this case, the fluorine resin or the silicone resin may be formed by an ECC (Easy Cleaning Coating) method.

In the case of the pattern, at least one of a hard coating layer, a digital printing layer, a coating layer for adjusting a contact angle, a deposition layer, a fine irregularity layer including fine irregularities, and a surface modification layer may be arranged in a pattern form. The hard coating layer may be a thermosetting hard coating layer or an ultraviolet curing hard coating layer. The thermosetting hard coating layer can be variously selected within the scope of the present invention. For example, an acrylic resin containing a hydroxyl group, an acrylic resin having a weight average molecular weight of 100,000 to 1,500,000, a resin composition containing block isocyanate as a main component, a composition containing a hydroxyl group containing acrylic resin and block isocyanate as essential components, and an isocyanate group And compounds containing two or more functional groups in one molecule and a block isocyanate.

The ultraviolet curing hard coat layer is made by blending various acrylic units and an ultraviolet curing catalyst, for example, a polyurethane resin, an epoxy resin or a polyester resin. As a specific example of the curable material by ultraviolet light, a urethane or acrylate oligomer, a reactive monomer, a photoinitiator and a leveling agent are mixed as the ultraviolet reactive coating material. Urethane acrylate oligomers contain aliphatic, cyclic aliphatic, aromatic compounds or oligomers of these compounds, and have a chemical formula in which polyester polyols or polyether polyols are contained on the molecular structure. As the reactive monomer, trimethyl propane triacrylate, hexanediol diacrylate, pentaerystilol triacrylate, dipentaerythrol hexaacrylate are mixed and adjusted in an appropriate ratio in consideration of hardness and adhesion. The photoinitiator uses a conventional polymerization initiator activated by ultraviolet rays, and in particular, hydroxycyclohexylphenyl ketone, benzophenol, and phenyl-2-hydroxy-2-phenyl ketone.

The digital printing layer is a digitally printed layer. The coating layer for adjusting the contact angle may be coated with an organosilicon compound as an example of the coating to increase the adhesion by reducing the contact angle. Examples of coatings that lower the adhesive force by increasing the contact angle may include anti-fingerprint, contamination prevention, and slip properties, and deposit titania (TiO ₂ ) or silica (SiO ₂ ) on the adherend 30, and then deposit the deposited film. The ash 30 may be formed by coating a fluorine resin, a silicone resin, or a mixture thereof. In this case, the fluorine resin or the silicone resin may be formed by an ECC (Easy Cleaning Coating) method.

The deposition layer is gold (Au), silver (Ag), platinum (Pt), silicon (Si), copper (Cu), palladium (Pd), nickel (Ni), tungsten (W), iron (Fe), cobalt (Co), titanium (Ti), chromium (Cr), manganese (Mn), zinc (Zn), zirconium (Zr), molybdenum (Mo), iridium (Ir), ruthenium (Ru), tantalum (Ta) or these It may be composed of a single layer or a plurality of layers consisting of any one of alloys or oxides thereof. The deposition layer controls the adhesion with the detachable control layer 20.

The fine concave-convex layer may be formed as a shape of any one selected from a rectangle, a triangle, and a circular cross section, or made of beads or beads and a binder. That is, the cross-section of the fine concave-convex layer may be angled, curved, or a combination thereof. The fine concave-convex layer is translucent and the light transmittance is lowered. Since the detachable adjustment layer 20 penetrates into the fine irregularities layer, it enhances the bonding force of the detachable adjustment layer 20. The surface modification layer is a surface modification to control the adhesion to the detachable control layer 20 through the plasma or corona treatment or a continuous treatment of the surface of the transparent polymer film.

Desorption control layer 20 according to an embodiment of the present invention is associated with the adhesion control layer 31, the adhesion is different. For example, the adhesion force is different when the plasma pattern 22a of the detachable adjustment layer 20 is in contact with the digital printing layer of the adhesion control layer 31 and when the plasma pattern 22a is in contact with the deposition layer of the adhesion control layer 31. . This attachment force is designed according to the type, shape, etc. of the display device.

3 is a plan view illustrating examples of the pattern arrays a, b, c, and d applied to the

display devices

100 and 200 according to an exemplary embodiment of the present invention. Here, only a few examples of the pattern arrangement (a, b, c, d), it can be variously modified within the scope of the present invention.

According to FIG. 3, the pattern arrays a, b, c, and d are partially modified without modifying the detachable adjusting layer 20 as a whole. That is, the pattern arrangements a, b, c, and d are present in the detachable adjusting layer 20. The pattern arrays a, b, c, and d utilize patterns of various shapes in a plane. Specifically, a B pattern having a stripe shape and extending in the longitudinal direction of the pattern arrays (a, b, c, d), a B pattern having the same adhesive force as the A pattern, and having different adhesive strengths, a C pattern having a single island shape and a plurality of islands. Dog pattern D pattern, E pattern C pattern extended form, F pattern with the same adhesive strength as E pattern, G pattern with fence form, H pattern with G pattern and adhesive force with fence form, pattern arrangement ( I pattern etc. which are arrange | positioned at the corner of a, b, c, d). The adhesion can be controlled by the extent to which the surface is modified.

In an embodiment of the present invention, the detachable control layer may be stably attached regardless of the shape by appropriately adjusting the adhesive force according to the position by appropriately adjusting the arrangement of the plasma pattern, the corona pattern, and the deposition pattern. Regardless of the shape, when attached stably, detachment does not occur and bubbles are easily removed.

In the drawings, examples of the pattern arrays a, b, c, and d are shown. An example of arranging the patterns may be a band form (a), a grid form (b), an island form (a, e, f), a fence form (c), or a combination thereof (c, d). The pattern of the pattern arrays (a, b, c, d) and the arrangement of the patterns are not limited to the examples described above, and any person having ordinary skill in the art without departing from the gist of the present invention may vary. It can be modified.

* Description of the sign

100, 200; First and second display devices

10; Attachment material 20; Detachable Control Layer

21; Detachable layer 22; Surface Modification Pattern

22a; Plasma pattern 22b; Corona pattern

22c; Deposition pattern 30; Substrate

31; Adhesive Control Layer

Claims

An adherend to which the attachment material is attached; And

It includes a detachable control layer located in any one of the attachment material or the adherend,

The detachable adjusting layer,

Desorption layer; And

And a surface modification pattern disposed on the detachable layer and formed of any one of a plasma pattern, a corona pattern, or a combination thereof.
The display device of claim 1, wherein the attachment material is at least one selected from a module element or a protective sheet constituting the display device.
The display device of claim 1, wherein the adherend is at least one selected from a module element or a protective sheet constituting the display device.
The display device of claim 1, wherein the adherend has a flat surface, a curved surface, or a combination thereof.
The display device of claim 1, wherein the adherend is foldable, rollable, or flexible.
The display device of claim 1, wherein the pattern arrangement of the surface modification pattern is formed in a strip form, a lattice form, an island form, a fence form, or a combination thereof.
The display device of claim 1, wherein the detachable layer is formed of any one of a coating and a sheet.
The display device of claim 1, wherein the plasma pattern is treated by one of an atmospheric pressure plasma, a reduced pressure plasma, and a corona plasma.
The display device of claim 1, wherein the corona pattern is formed by surface oxidation of the detachable layer to express polar groups.
The display device of claim 1, wherein the surface modification pattern further comprises a deposition pattern.
The method of claim 10, wherein the deposition pattern is titania (TiO 2 ) or silica (SiO 2 ) or gold (Au), silver (Ag), platinum (Pt), silicon (Si), copper (Cu), or palladium (Pd). ), Nickel (Ni), tungsten (W), iron (Fe), cobalt (Co), titanium (Ti), chromium (Cr), manganese (Mn), zinc (Zn), zirconium (Zr), molybdenum (Mo) ), An iridium (Ir), ruthenium (Ru), tantalum (Ta) or an alloy or at least any one of these oxides or a deposition layer consisting of a single layer or a fluorine resin or a silicone resin on the deposition layer Display device using a surface-modified removable layer, characterized in that the included layer is located.
An adherend to which the attachment material is attached; And

It includes a detachable control layer located in any one of the attachment material or the adherend,

The detachable adjusting layer,

Desorption layer; And

The display device using the surface-modified detachable layer disposed on the detachable layer, wherein the surface-modified pattern comprises a deposition pattern.
The method of claim 12, wherein the deposition pattern is titania (TiO 2 ) or silica (SiO 2 ) or gold (Au), silver (Ag), platinum (Pt), silicon (Si), copper (Cu), or palladium (Pd). ), Nickel (Ni), tungsten (W), iron (Fe), cobalt (Co), titanium (Ti), chromium (Cr), manganese (Mn), zinc (Zn), zirconium (Zr), molybdenum (Mo) ), An iridium (Ir), ruthenium (Ru), tantalum (Ta) or an alloy or at least any one of these oxides or a deposition layer consisting of a single layer or a fluorine resin or a silicone resin on the deposition layer Display device using a surface-modified removable layer, characterized in that the included layer is located.
The display device of claim 12, wherein the attachment material is at least one selected from a module element or a protective sheet constituting the display device.
The display device of claim 12, wherein the adherend is at least one selected from a module element or a protective sheet constituting the display device.
The display device of claim 12, wherein the adherend has a flat surface, a curved surface, or a combination thereof.
The display device of claim 12, wherein the adherend is foldable, rollable, or flexible.
The display device of claim 12, wherein the detachable layer is formed of any one of a coating and a sheet.