WO2018066854A1

WO2018066854A1 - Display device including detachable sheet

Info

Publication number: WO2018066854A1
Application number: PCT/KR2017/010515
Authority: WO
Inventors: 김영수
Original assignee: 주식회사 맥스젠테크놀로지
Priority date: 2016-10-03
Filing date: 2017-09-23
Publication date: 2018-04-12

Abstract

Disclosed is a display device including a detachable sheet, which allows the easy replacement of a damaged window or touch screen, makes it simple to separate a window or touch screen therefrom, and can be manufactured in a simple and low-cost process, wherein the detachable sheet has an adjustable adhesive force for attachment and detachment or enables easy removal of air bubbles in addition to a detachable function allowing various designs therefor. The display device comprises a window and a display and, optionally, a touch screen and includes a detachable sheet, which is located at one among the window, the touch screen, and the display, ranges in adhesive force from 0.1gf/25mm to 500gf/25mm, has a sheet shape, and has viscosity.

Description

Display device including a removable sheet

The present invention relates to a display device, and more particularly, to a display device to which a window or a touch screen that is detachable using a detachable sheet is applied.

In the display device, a display such as a liquid crystal display (LCD), an organic light emitting diode (OLED), and an electrophoretic display (EPD) forms a screen. Such display devices are applied to various video display devices. On the other hand, the device employs a touch screen to provide convenience of operation. A window made of tempered glass or transparent polymer resin is disposed on the front of the touch screen. The window is divided into a screen portion and a bezel portion on the rim at the center thereof, and protects the display device from damage due to external impact or contact. The window is adhered to and fixed to the touch screen with a transparent adhesive (OCA) or ultraviolet curing adhesive. Recently, with the advent of flexible and curved displays, windows corresponding to them have emerged.

Meanwhile, Korean Patent No. 10-1574923 proposes a display apparatus including a detachable window and a detachable method thereof. Specifically, the patent can easily replace the damaged window, the separation of the window from the display device is simple, the process of manufacturing the display device is simple, low manufacturing cost, it can be designed in various ways. Similarly, a display device capable of attaching and detaching a touch screen is also possible. By the way, it is necessary to supplement the functions such as adjusting the adhesive force detachable to the function proposed in the patent or to facilitate the removal of bubbles. This is because the removable window or the touch screen is set to meet various uses and environments.

The problem to be solved by the present invention is to easily replace the damaged window or touch screen, the separation of the window or touch screen in the display device is simple, the process of manufacturing the display device is simple, low manufacturing cost, various The present invention provides a display device including a detachable sheet for controlling adhesion or detachment of bubbles in a detachable function that can be designed.

A display device including a detachable sheet for solving the problems of the present invention includes a window and a display, a touch screen is selectively included, and a display device comprising a detachable sheet, wherein the window, the touch screen and the display Located in any one of the, and includes a detachable sheet having an adhesive force of 0.1gf / 25mm to 500gf / 25mm. At this time, the detachable sheet is in the form of a sheet and has adhesiveness.

In the apparatus of the present invention, the detachable sheet may be a sheet made of any one selected from adhesives, mixtures thereof, or copolymers thereof in which a crosslinking agent is mixed with a thermosetting resin or an ultraviolet curable resin, which is a silicone-based polymer or a urethane-based polymer. The detachable sheet may be a hydrogel type. The detachable sheet may include an elastomer in the hydrogel.

In a preferred apparatus of the present invention, the detachable sheet is adhered to the adhesion reducing layer, and the adhesion reducing layer reduces the adhesion force of the detachable pattern to the adhesion reducing layer. The adhesion reducing layer may include a fluorine resin or a silicone resin. The adhesion reducing layer may include a deposition layer made of titania (TiO ₂ ) or silica (SiO ₂ ) and a layer including fluorine resin or silicon resin on the deposition layer. The adhesion of the detachable sheet may be 0.5gf / 25mm to 500gf / 25mm by the adhesion reducing layer.

According to the display device including the detachable sheet of the present invention, by applying a detachable sheet in the form of a sheet having an adhesive force of 0.1 gf / 25 mm to 500 gf / 25 mm, the damaged window or touch screen can be easily replaced, The separation of the window or touch screen is simple, the process of manufacturing the display device is simple, the manufacturing cost is low, and it is possible to adjust the adhesive force detachable to the detachable function that can be variously designed or to easily remove bubbles. .

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

2 is a cross-sectional view illustrating a second display apparatus including a detachable first window structure according to the present invention.

3 is a cross-sectional view for describing a third display device including a detachable second window structure according to the present invention.

4 is a cross-sectional view for describing a fourth display apparatus including a detachable third window structure according to the present invention.

5 is a cross-sectional view for describing a fifth display apparatus including a detachable fourth window structure according to the present invention.

6 is a cross-sectional view illustrating a sixth display device including a detachable fifth window structure 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.

Embodiment of the present invention by applying a detachable adhesive sheet, it is easy to replace the damaged window or touch screen, the separation of the window or touch screen in the display device is simple, the process of manufacturing the display device is simple and manufacturing The present invention provides a display device that has a low cost and adjusts adhesive force detachable to a detachable function that can be variously designed or facilitates the removal of bubbles. In this case, each of the window structure or the touch screen is formed with a detachable sheet detachable on the touch screen or display. Therefore, the to-be-attached device can be said to be associated with a touch screen or display.

The detachable sheet of the present invention is limited to being detached from the touch screen and the display, and is clearly distinguished from the conventional window protection film detachable from the window. That is, a device made of a display without a window or touch screen of the present invention is not a completed display device. The display device is completed only when the window or the touch screen of the present invention is attached. By the way, the window protective film is attached to the window of the present invention, the window protective film is attached to the already completed display. Therefore, although the window or touch screen of the present invention is an essential component of the display device, the conventional window protection film corresponds to an auxiliary component that can be selectively applied to the display device. Accordingly, the window protection film is excluded within the scope of the present invention.

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 of the display device may be flat or curved, or may be flexible. The image processing device includes a window, a touch screen, and a display. Therefore, the window is a generic term for windows of all image processing devices such as windows of mobile devices, windows of information processing terminals, and televisions. Likewise, the touch screen and the display also refer to the touch screen and the display applied to all image processing devices.

Meanwhile, the display device applied to the embodiment of the present invention may not include a touch screen but may include a window and a display. In other words, the display device of the present invention may consist of a window, a touch screen, and a display, and may consist of a window and a display. Hereinafter, a display device having a touch screen will be taken as an example. In addition, the display device to be described later will be described as having a removable sheet on the window or touch screen, there is an adhesive reducing layer on the touch screen or the display corresponding thereto, in some cases, there is an adhesive reducing layer on the window or touch screen, The touch screen or display may have a removable sheet. In this case, the previous case is taken as an example.

Hereinafter, the detachable sheet formed on the window structure including the window and the detachable sheet formed on the window structure including the touch screen will be divided and described.

The window structure is divided into first to fifth window structures detachable from the touch screen and the display for convenience of description. That is, the first to fifth window structures are attached to and detached from the touch screen, the cover layer of the touch screen, and a display (hereinafter, referred to as a device to be glued). Hereinafter, the first to fifth window structures will be described separately. The embodiment of the present invention shows an example of a display device to which the first to fifth window structures are applied, but may be applied to other types of display devices within the scope of the present invention. The window structure of the present invention is manufactured separately and attached to the attached device. In this case, the window structure may be attached by hand.

1 is a cross-sectional view for describing a first display apparatus 100 including a detachable first window structure according to an exemplary embodiment of the present invention. However, a cross-sectional view of a strict meaning is not expressed, and there may be elements that may not appear in the drawings for the convenience of description.

Referring to FIG. 1, the first display apparatus 100 is formed by sequentially stacking the display 10, the adhesive layer 12, the touch screen 14, the detachable sheet 18, and the window 20. At this time, it is referred to as the first window structure 22 including the detachable sheet 18 and the window 20. The display 10 includes a liquid crystal display (LCD), an organic light emitting diode (OLED), an electrophoretic display (EPD), and the like, and may also use quantum dots. For example, a thermosetting adhesive or an ultraviolet curable adhesive may be used for the adhesive layer 12. However, the present invention is not limited thereto, and an OCA tape may be used. The touch screen 14 has conductive patterns formed on one side or both sides of an 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 window 20 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 20 may also be a laminated structure in which tempered glass and plastic substrate are formed in multiple layers.

The window 20 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. On the window 20, a functional coating layer such as anti-fingerprint coating or antimicrobial coating or anti-scratch coating may be formed. The functional coating layer may be formed by a dry coating such as wet coating and deposition by applying a coating liquid. In addition, the lower end of the glass substrate or the plastic substrate of the window 20 may be provided with characteristics such as shielding, antireflection, blue light blocking, electromagnetic wave blocking, privacy, and the like. In addition, an opening may be formed in the window 20 to expose a button, a camera, a speaker, or the like.

The detachable sheet 18 is an adhesive sheet attached to the window 20 in the form of a sheet, not a coating. The detachable sheet 18 may be a sheet formed of any one selected from an adhesive, a mixture thereof, or a copolymer thereof in which a crosslinking agent is mixed with a thermosetting resin or an ultraviolet curable resin, which is an acrylic polymer, a silicone polymer, or a urethane polymer. For example, (a) a (meth) acrylic acid ester monomer having a hydrocarbon group having 1 to 12 carbon atoms, (b) a hydroxy group-containing (meth) acrylic acid ester monomer, (c) a monomer having an amide group, and (d) a vinyl ester There exists an acryl-type high molecular compound which copolymerizes the monomer component containing a type | system | group monomer, resin acid value is 0.1 mgKOH / g or less, and permittivity is 3-6. In addition, there is a light-permeable pressure-sensitive adhesive sheet, a cross-linked silicone type adhesive sheet, characterized in that the silicone gel.

The desorption sheet 18 is a sheet composed of an adhesive polymer containing a crosslinking agent and an acrylic polymer having a specific molecular weight that does not contain an acid component containing alkoxyalkyl acrylate as a main monomer, and is a (meth) acrylic resin 65 to 85 in a solid content ratio. Mass%, 10-30 mass% of polyoxyalkylene polyols, 1.0-5.0 mass% of polyisocyanates, 0.005-0.1 mass% of tin-type catalysts, The acid value is 0-5 mgKOH / g, (Met The acrylic resin has a weight average molecular weight of 100,000 to 600,000, and (B) a transparent pressure-sensitive adhesive sheet having a number average molecular weight of 500 to 1500 of the polyoxyal chelene polyol.

Hydrogel type sheets are possible. For example, hydrogels based on copolymers of siloxane prepolymers and hydrophilic monomers are preferred. The hydrogel is optically transparent and homogeneous. Of course, in order to impart adhesion to the hydrogel, it is possible to mix a material such as a predetermined elastomer. The elastomers have rubber properties at room temperature, but plasticize gradually at high temperatures and exhibit plastic properties. Thermoplastic elastomers exist in the form of elastic rubber without crosslinking. In particular, the olefinic thermoplastic elastomer is a material in which olefinic resins such as polyethylene and polypropylene and olefinic rubbers (eg, EDPM and ethylene propylene diene monomers) are combined as main components.

Since the removable sheet 18 according to the embodiment of the present invention is a sheet type having an adhesive force of 0.1 gf / 25 mm to 500 gf / 25 mm, the first window structure 22 can be manufactured more easily than the coating process. That is, what is necessary is just to attach the removable sheet 18 to the window 20 according to the magnitude | size. The thickness of each of the detachable sheet 32 can be enough as long as detachment is sufficient, and 10 micrometers-200 micrometers are preferable. It is apparent that the thickness can be obtained through repeated experiments by a person of ordinary skill in the art.

Meanwhile, in order to facilitate the detachment of the first window structure 22, an adhesion reducing layer 16 may be added on the touch screen 14. The adhesion reducing layer 16 lowers the frictional force to increase the slip property. The adhesion reducing layer 16 allows the first window structure 22 to be easily detached from the touch screen 14. The adhesion reducing layer 16 may use a coating material of fluorine resin or silicone resin. The adhesion reducing layer 16 may be formed by depositing titania (TiO ₂ ) or silica (SiO ₂ ) on the touch screen 14, and then coating a fluorine resin or a silicone resin on the deposited touch screen 14. . In this case, the fluorine resin or the silicone resin may be formed by an ECC (Easy Cleaning Coating) method. Applying the adhesion reducing layer 16 can more effectively suppress the generation of bubbles when the window 20 is attached. In addition, the adhesion reducing layer 16 allows the consumer to easily attach and detach the first window structure 22 by themselves without any tools.

The adhesion reducing layer 16 may have fine protrusions formed in whole or in part. A portion of the fine protrusions is called an adhesion reducing layer pattern. In addition, the adhesion reducing layer 16 may include a pattern made of fine projections.

The first window structure 22 of the present invention is manufactured separately and protected by a release film. The release film is removed to attach the first window structure 22 to the touch screen 14 or the adhesion reducing layer 16. When the release film is removed, the detachable sheet 18 is exposed. When the first window structure 22 having the removable sheet 18 exposed is manually attached to the touch screen 14 or the adhesion reducing layer 16, the display on which the window 20 is mounted may be completed. In addition, if the window 20 is damaged or replaced, the first window structure 20 may be manually removed and a new first window structure 22 may be attached.

2 is a cross-sectional view for describing a second display apparatus 200 including a detachable first window structure 22 according to an exemplary embodiment of the present invention. However, a cross-sectional view of a strict meaning is not represented, and there may be elements that may not appear on the cross-section for convenience of description. In this case, the second display apparatus 200 is the same as the first display apparatus 100 except that the adhesive layer 12 is not provided. In the following descriptions that overlap with the above description will be omitted or briefly described.

Referring to FIG. 2, the second display apparatus 200 sequentially forms the display 10, the touch screen 14, and the first window structure 22. Here, the touch screen 14 is a conductive pattern formed directly on the display 10. That is, the touch screen 14 is formed together with the conductive pattern formed on the display 10. In this case, the first window structure 22 includes the detachable sheet 18 described above.

Like the first display apparatus 100, the second display apparatus 200 may include an adhesion reducing layer 16. Materials, functions, and the like of the adhesion reducing layer 16 are the same as those described in the first display apparatus 100. The adhesive force according to the embodiment of the present invention may vary depending on the presence of the adhesion reducing layer 16. The adhesive force in the case where the adhesive reducing layer 16 is present is 0.5 gf / 25 mm to 500 gf / 25 mm, but the adhesive force in the absence of the adhesive reducing layer 16 is 0.1 gf / 25 mm to 200 gf / 25 mm. When there is a removable sheet 18 of the same material and thickness, if the adhesion reducing layer 16 is present, it is easy to attach the first window structure 22 without bubbles. In addition, under the influence of the adhesion reducing layer 16, separation of the first window structure 22 occurs relatively easily.

Although not shown, an additional element for providing various functions may be further included between the window 20 and the detachable seat 18 of the first window structure 22 according to the exemplary embodiment of the present invention. The additional element may include a transparent adhesive layer (OCA), a scattering prevention layer, and the like, and if necessary, a printing layer and a functional coating layer may be appropriately formed. For example, after the transparent adhesive layer including the print layer is formed on the window 20 and a transparent synthetic resin film (eg, PET film) is attached, the detachable sheet 18 may be formed on the transparent synthetic resin film. Since these additional elements are well known, a detailed description thereof will be omitted.

3 is a cross-sectional view for describing a third display apparatus 300 including a detachable second window structure 26 according to an exemplary embodiment of the present invention. However, a cross-sectional view of a strict meaning is not represented, and there may be elements that may not appear on the cross-section for convenience of description. In this case, the third display apparatus 300 is the same as the first display apparatus 100 except for introducing the touch screen cover layer 24. Accordingly, detailed description of the same reference numerals will be omitted. In this case, the second window structure 26 may further include additional elements, as described in the first window structure 22.

Referring to FIG. 3, the third display apparatus 300 sequentially stacks the display 10, the adhesive layer 12, the touch screen 14, the cover layer 24, the detachable sheet 18, and the window 20. Can be implemented. In some cases, the third display apparatus 300 may be directly bonded to the display 10 and the touch screen 14 without the adhesive layer 12 that is the same as the second display apparatus 200. Here, a conductive pattern for forming the touch screen 14 is disposed above or below the cover layer 24. In a strict sense, the cover layer 24 may be regarded as part of the touch screen 14. The cover layer 24 prevents the touch screen 14 from being damaged by impact or contamination. In addition, the third display apparatus 300 forms a touch screen 14 by directly forming a conductive pattern on the display 10, and in this case, the touch screen cover layer 24 may be positioned on the top of the display 10. .

When the cover layer 24 is covered with the second window structure 26, the cover layer 24 is positioned inside the third display device 300. Since the cover layer 22 is positioned inside, the cover layer 24 is exposed to the outside of the third display apparatus 300, so that the cover layer 24 is not damaged by an impact or the like. The cover layer 24 may include a printed layer or a functional coating layer, and may be beautiful to the third display apparatus 300 through various designs or translucent. In addition, the cover layer 24 may exclude the influence of bending and step by various patterns, circuits, and the like of the touch screen 14. When the influence of the bending and the step disappears, the detachment by the detachable sheet 18 becomes easier.

The cover layer 24 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 24 may be sufficient so that the touch screen 20 is not damaged in the process of using the third display apparatus 300.

Like the first display apparatus 100, the third display apparatus 300 may include an adhesion reducing layer 16. Materials, functions, and the like of the adhesion reducing layer 16 are the same as those described in the first display apparatus 100. The adhesive force according to the embodiment of the present invention may vary depending on the presence of the adhesion reducing layer 16. The adhesive force in the case where the adhesive reducing layer 16 is present is 0.5 gf / 25 mm to 500 gf / 25 mm, but the adhesive force in the absence of the adhesive reducing layer 16 is 0.1 gf / 25 mm to 200 gf / 25 mm. When there is a detachable sheet 18 of the same material and thickness, if the adhesion reducing layer 16 is present, it is easy to attach the second window structure 26 without bubbles. In addition, under the influence of the adhesion reducing layer 16, separation of the second window structure 26 occurs relatively easily.

When the adhesive force of the removable sheet 18 is about 0.1 gf / 25 mm to 500 gf / 25 mm, the removable sheet 18 has a self adhesive force. The self-adhesive force is a property that the detachable sheet 18 adheres to itself without bubbles even if only the detachable sheet 18 is placed on the touch screen cover layer 24. On the other hand, applying the adhesion reducing layer 16 to the touch screen cover layer 24 has a better self-adhesion than without the adhesion reducing layer 16.

If the window structure is damaged, the display apparatuses according to the embodiment of the present invention are replaced by selecting and attaching a new window structure. Specifically, the broken window structure is removed and replaced by attaching a new window structure. The replacement of the window structure can be done manually by the consumer, and the replacement time is very short. In addition, since only the window structure needs to be removed, the display device can be easily recycled. Furthermore, since the window structure is detachable, it can be easily attached without bubbles. Since the manufacturer only needs to produce parts other than the window structure and does not have to perform the bonding process, the manufacturing process is simplified.

4 is a cross-sectional view for describing a fourth display apparatus 400 including a detachable third window structure 30 according to an exemplary embodiment of the present invention. However, a cross-sectional view of a strict meaning is not represented, and there may be elements that may not appear on the cross-section for convenience of description. In this case, the fourth display apparatus 400 is basically the same as the first display apparatus 100 except for changing the position of each floor. In the following descriptions that overlap with the above description will be omitted or briefly described.

According to FIG. 4, the fourth display apparatus 400 is a stack of the display 10, the removable sheet 18, the touch screen 14, the adhesive layer 12, and the window 20 sequentially. In this case, the window 20, the adhesive layer 12, the touch screen 14, and the detachable sheet 18 form the third window structure 30. The display 10 includes a liquid crystal display (LCD), an organic light emitting diode (OLED), an electrophoretic display (EPD), and the like, and may also use quantum dots. For example, a thermosetting adhesive or an ultraviolet curable adhesive may be used for the adhesive layer 12. However, the present invention is not limited thereto, and an OCA tape may be used. The touch screen 14 has conductive patterns formed on one side or both sides of an 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. Meanwhile, in order to facilitate attachment and detachment of the third window structure 30, an adhesion reducing layer 16 may be added on the display 10. The adhesion reducing layer 16 increases the contact angle to increase slip property. The adhesion reducing layer 16 allows the third window structure 30 to be easily detached from the touch screen 14. The adhesion reducing layer 16 may use a coating material of fluorine resin or silicone resin. The adhesion reducing layer 16 may be formed by depositing titania (TiO ₂ ) or silica (SiO ₂ ) on the display 10, and then coating a fluorine resin or a silicon resin on the deposited display 10. In this case, the fluorine resin or the silicone resin may be formed by an ECC (Easy Cleaning Coating) method. By applying the adhesion reducing layer 16, it is possible to more effectively suppress the generation of bubbles when attaching the touch screen 14. In addition, the adhesion reduction pattern 60 allows the consumer to easily attach and detach the third window structure 30 by himself or herself without a separate tool.

When the adhesive force of the removable sheet 18 is about 0.1 gf / 25 mm to 500 gf / 25 mm, the removable sheet 18 has a self adhesive force. The self-adhesive force is a property that the removable sheet 18 adheres to itself without bubbles even if only the removable sheet 18 is placed on the touch screen 14. On the other hand, when the adhesion reducing layer 16 is applied to the display 10, it has a more improved self-adhesive force than when there is no adhesion reducing layer 16.

The adhesive force according to the embodiment of the present invention may vary depending on the presence of the adhesion reducing layer 16. The adhesive force in the case where the adhesion reducing layer 16 is present is 0.5 gf / 25 mm to 500 gf / 25 mm. If there is no adhesion reducing layer 16, the adhesion is 0.1gf / 25mm to 200gf / 25mm. When there is the detachable sheet 18 of the same material and thickness, if the adhesion reducing layer 16 is present, it is easy to attach the third window structure 30 without bubbles. Also, under the influence of the adhesion reducing layer 16, separation of the third window structure 30 occurs relatively easily.

The third window structure 30 of the present invention is manufactured separately and protected by a release film. In order to attach the third window structure 30 to the display 10, the release film is removed. When the release film is removed, the detachable sheet 18 is exposed. When the third window structure 30 on which the detachable sheet 18 is exposed is manually attached to the display 10, the display on which the window 20 is mounted may be completed. Accordingly, unlike the conventional method, a precise bonding process is not required. In addition, if the third window structure 30 is damaged or replaced, the third window structure 30 may be manually removed and a new third window structure 30 may be attached.

5 is a cross-sectional view for describing a fifth display apparatus 500 including a detachable fourth window structure 34 according to an exemplary embodiment of the present invention. However, a cross-sectional view of a strict meaning is not represented, and there may be elements that may not appear on the cross-section for convenience of description. In this case, the fifth display apparatus 500 is the same as the first display apparatus 100 except for replacing the adhesive layer 12 with the detachable sheet 32. In the following descriptions that overlap with the above description will be omitted or briefly described.

Referring to FIG. 5, the display 10, the detachable sheet 18, the touch screen 14, the detachable sheet 32, and the window 20 are sequentially stacked on the fifth display apparatus 500. In this case, the window 20, the detachable sheet 32, the touch screen 14, and the detachable sheet 18 form a fourth window structure 34. At this time, the removable sheet 32 has the same function and role, but the reference numerals were different because there is a difference in the position formed. The fourth window structure 34 is detachably attached to the display 10 by the detachable sheet 18. The detachable sheet 18 may be attached to the display 10 while the release film is removed. In addition, the fourth window structure 34 may be detachably attached to the touch screen 14 by the detachable sheet 32. In other words, the fifth window structure 34 includes a detachable sheet 18 and a detachable sheet 32 that can be detachably attached to the display 10 and the touch screen 20, respectively.

Although not shown, between the window 20 and the removable sheet 32 of the third and

fourth window structures

30 and 32 according to the embodiment of the present invention, or between the touch screen 14 and the removable sheet 18. It may further include an additional element to give a variety of functions to any one or all. The additional element may include a transparent adhesive layer (OCA), a scattering prevention layer, and the like, and if necessary, a printing layer and a functional coating layer may be appropriately formed. For example, after the transparent adhesive layer including the print layer is formed on the touch screen 14 and a transparent synthetic resin film (for example, PET film) is attached, the detachable sheet 18 may be formed on the transparent synthetic resin film. Since these additional elements are well known, a detailed description thereof will be omitted.

6 is a cross-sectional view for describing a sixth display apparatus 600 including a detachable fifth window structure 36 according to an exemplary embodiment of the present invention. However, a cross-sectional view of a strict meaning is not represented, and there may be elements that may not appear on the cross-section for convenience of description. In this case, the sixth display apparatus 600 is the same as the fourth display apparatus 400 except that the adhesive layer 12 is not provided. Accordingly, detailed description of the same reference numerals will be omitted. In this case, as described in the third window structure 30, the fifth window structure 36 may further include additional elements.

According to FIG. 6, the sixth display device 600 is a stack of a display 10, a removable sheet 18, a touch screen 14, and a window 20. In this case, the window 20, the touch screen 14, and the removable sheet 18 form the fifth window structure 36. In this case, the touch screen 14 is a conductive pattern formed directly under the window 20. That is, the touch screen 14 is formed together with the conductive pattern formed in the window 20.

Like the fourth display apparatus 400, the sixth display apparatus 600 may include an adhesion reducing layer 16. Materials, functions, and the like of the adhesion reducing layer 16 are the same as those described in the fourth display apparatus 400. The adhesive force according to the embodiment of the present invention may vary depending on the presence of the adhesion reducing layer 16. The adhesive force in the case where the adhesive reducing layer 16 is present is 0.5 gf / 25 mm to 500 gf / 25 mm, but the adhesive force in the absence of the adhesive reducing layer 16 is 0.1 gf / 25 mm to 200 gf / 25 mm. When there is the detachable sheet 18 of the same material and thickness, if the adhesion reducing layer 16 is present, it is easy to attach the fifth window structure 36 without bubbles. In addition, under the influence of the adhesion reducing layer 16, separation of the fifth window structure 36 occurs relatively easily.

When the adhesive force of the removable sheet 18 is about 0.1 gf / 25 mm to 500 gf / 25 mm, the removable sheet 18 has a self adhesive force. The self-adhesive force is a property that the removable sheet 18 adheres to itself without bubbles even if only the removable sheet 18 is placed on the display 10. On the other hand, applying the adhesion reducing layer 16 to the display 10 has a better self-adhesion than without the adhesion reducing layer 16.

When applying the first to

fifth window structures

22, 26, 30, 34, 36, electrical connections may be made to face each other in a predetermined area of each of the display 10 and the touch screen 14. For the connection, part of the detachable sheet 18 of the touch screen 14 can be removed. When the first to

fifth window structures

22, 26, 30, 34, and 36 are attached to the touch screen 14 and the display 10, the connection parts are connected to each other. In this case, connection of the first to

sixth display apparatuses

100, 200, 300, 400, 500, and 600 may be implemented.

If the window structure is damaged, the display apparatuses according to the embodiment of the present invention are replaced by selecting and attaching a new window structure. Specifically, the broken window structure is removed and replaced by attaching a new window structure. The replacement of the window structure can be carried out by the consumer, and the replacement time is very short. In addition, since only the window structure needs to be removed, the display device can be easily recycled. Furthermore, since the window structure is detachable by adhesion, it can be easily attached without bubbles. Since the manufacturer only needs to produce parts other than the window structure and does not have to perform the bonding process, the manufacturing process is simplified. In particular, when the adhesion reduction pattern is present, it is easier to attach the window structure without bubbles, and separation of the window structure occurs relatively easily due to the influence of the adhesion reduction pattern.

The display device of the present invention can be designed in various ways. The display device of the present invention can be designed such as a beautiful shape, various colors and patterns. This is because by detaching the original window structure and attaching a new structure, the appearance of the window structure can be changed to a desired design. Conventionally, in order to change the design, it is necessary to disassemble the window structure and re-bond the new window structure. However, the display device of the present invention is detached from the existing window structure, and the new window structure attached to the design changes. Accordingly, unlike the related art, the window structure of the present invention is not a necessity fixed to the display device, and may be treated as a consumable that can be attached and detached as necessary. In this way, if the design is diversified, the manufacturer of the display apparatus does not have to provide a service later in response to the design.

According to the display device having a detachable sheet of the present invention and a method of manufacturing the same, by detaching and detaching a window having a detachable sheet having an adhesive force of 0.1 gf / 25 mm to 500 gf / 25 mm, the damaged window is easily replaced and the separation of the window is simple. . In addition, the detachable sheet of the present invention is self-adhesive and can be easily detached without bubbles. The display device of the present invention has a simple manufacturing process, low manufacturing cost, and can be designed in various ways to satisfy the needs of consumers. Furthermore, since the window is easily replaced by anyone, it can be treated as a one-time consumable rather than a necessity fixed to the display device.

As mentioned above, although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is possible. For example, a separate means such as a groove may be provided in the injection molded product of the display device so that the window structure can be easily attached and detached. In addition, although a window or a touch screen has a detachable sheet and a corresponding touch screen or display has an adhesive reducing layer, it is described that in some cases, the window or touch screen has an adhesive reducing layer, and a touch screen or display corresponding thereto. There may be a removable sheet.

* Description of the sign

100, 200, 300, 400, 500, 600; First to sixth display device

10; Display 20; window

14; Touch screen 16; Adhesion Reduction Layer

18; Detachable Sheet

Claims

A display device including a window and a display, and optionally including a touch screen, and including a detachable sheet,

Located in any one of the window, the touch screen and the display, and includes an adhesive sheet having an adhesive force of 0.1gf / 25mm to 500gf / 25mm,

The detachable sheet is a display device comprising a detachable sheet, characterized in that the sheet form and has an adhesive.
The method of claim 1, wherein the detachable sheet comprises a detachable sheet comprising any one selected from adhesives, mixtures or copolymers thereof in which a crosslinking agent is mixed with a thermosetting resin or an ultraviolet curable resin, which is a silicone-based polymer or a urethane-based polymer. Display device.
The display apparatus according to claim 1, wherein the detachable sheet is a hydrogel type.
The display apparatus of claim 1, wherein the detachable sheet comprises an elastomer in the hydrogel.
The display apparatus of claim 1, wherein the detachable sheet is bonded to the adhesion reducing layer, and the adhesion reducing layer reduces the adhesive force to which the detachable pattern is attached to the adhesion reducing layer.
The display device of claim 5, wherein the adhesion reducing layer comprises a fluorine resin or a silicone resin.
The method of claim 5, wherein the adhesion reducing layer is a deposition layer comprising a deposition layer made of titania (TiO 2 ) or silica (SiO 2 ) and a layer containing a fluorine resin or a silicone resin on the deposition layer. Display device comprising a.
The display apparatus according to claim 5, wherein the adhesive force of the detachable sheet is 0.5gf / 25mm to 500gf / 25mm by the adhesion reducing layer.