KR101657136B1 - Protecting sheet for touch screen panel having curved surface of edge part - Google Patents

Protecting sheet for touch screen panel having curved surface of edge part Download PDF

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Publication number
KR101657136B1
KR101657136B1 KR1020150051512A KR20150051512A KR101657136B1 KR 101657136 B1 KR101657136 B1 KR 101657136B1 KR 1020150051512 A KR1020150051512 A KR 1020150051512A KR 20150051512 A KR20150051512 A KR 20150051512A KR 101657136 B1 KR101657136 B1 KR 101657136B1
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KR
South Korea
Prior art keywords
protective sheet
touch screen
screen panel
curved
rim
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KR1020150051512A
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Korean (ko)
Inventor
김영수
유광일
김나영
Original Assignee
주식회사 맥스젠테크놀로지
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Priority to KR1020150051512A priority Critical patent/KR101657136B1/en
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Publication of KR101657136B1 publication Critical patent/KR101657136B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)

Abstract

A curved surface which can prevent scattering of bent portions of the tempered glass corresponding to the rim portion, prevents foreign matter from flowing into the gap, simplifies the manufacturing process, can remove foreign matter from the exposed portions, A protective sheet for a touch screen panel having a rim portion is presented. The sheet is a curved surface portion covered with a curved surface touch screen panel having a curved edge portion. The protective sheet has a curved surface portion having a large degree of curvature and a tempered glass portion having a curved surface portion, And a cured layer formed on the curved surface portion facing the rim and hardened by curing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a protective sheet for a touch screen panel having a curved frame portion,

 BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a protective sheet for a touch screen panel, and more particularly, to a protective sheet for protecting a screen from being damaged by being attached to a touch screen panel having a frame portion thinner than a center portion and having a three-

The touch screen is widely used in mobile devices such as mobile phones, smart phones, and tablets, and terminals such as information processors such as ATMs and kiosks. The touch screen provides convenience of operation on a screen formed using a liquid crystal display device or a light emitting diode display device. A touch screen is usually attached with a protective sheet to prevent screen damage due to frequent screen touches or collision or scratches. Tempered glass having excellent scratch resistance, heat resistance, and chemical resistance has been used for the protective sheet. Generally, the protective sheet is made by laminating the anti-scattering film which prevents scattering of tempered glass and tempered glass.

On the other hand, recently, a touch screen panel whose edge portion is thinner than the central portion and has a three-dimensional curved surface shape has been applied. Such a panel is called a curved touch screen panel. There is a demand for a curved surface protection sheet to which a curved surface reinforced glass with a portion corresponding to the rim bent in conformity with the panel is used. However, in the case of the conventional curved surface protective sheet, the anti-scattering film is attached to the center portion, but the anti-scattering film is not attached to the curved surface portion. The curved portion without the anti-scattering film can not prevent scattering of the tempered glass. Further, it is difficult for the conventional protective sheet to block the inflow of foreign matter generated due to a gap between the curved surface protection sheet and the touch screen panel.

Korean Patent Laid-Open Publication No. 2014-0013155 adopts a method of using flat tempered glass and attaching the protective cover to the front of the rim. The above method can not be adopted for the curved reinforced glass. Further, since the protective cover of multiple layers needs to be attached to the front surface of the rims, the manufacturing process is complicated. Further, the protective cover exposed to the outside is left with an adhesive material, foreign substances outside the portion are buried, and the aesthetic appearance is damaged. Incidentally, when the size of the rim constituting the curved surface increases, the portion occupying the curved surface portion of the protective sheet expands, and the gap with the rim portion increases excessively. Accordingly, it is difficult for the system according to the patent to appropriately cope with the shape of the rim portion.

A problem to be solved by the present invention is to prevent scattering of a bent portion of tempered glass corresponding to a rim portion, to prevent foreign matter from entering into a gap, to simplify the manufacturing process, to prevent foreign matter from being applied to the exposed portion, And to provide a protective sheet for a touch screen panel having a curved frame portion that can appropriately respond to a shape.

The present invention provides a protective sheet for a touch screen panel having a curved frame portion, the curved surface portion having a curved surface portion having a large degree of curvature, And a hardened layer formed on the curved surface portion facing the edge portion and hardened by hardening. The hardened layer is formed of a hardened glass, which is located on the inner side of the curved portion and has a smaller degree of warpage than the curved portion.

In the protective sheet of the present invention, the rim portion may have the same or partially different curvature along the periphery of the panel. The rim portion may be formed on both side edges or one side edge of the rectangular panel. The inner side is flat or curved. The inflection point of the panel and the inflection point of the protective sheet may not coincide with each other with respect to the panel. It is preferable that a shatterproof film is adhered to the adhesion surface of the inner side portion.

In the preferred protective sheet of the present invention, the cured layer may be contacted with the scattering-preventive film. It is preferable that the thickness of the cured layer contacting the shrinkage prevention film is the same. The cured layer may be formed of an ultraviolet curing resin. The cured layer may be formed by blending an acrylic unit and an ultraviolet curing catalyst in any one of a polyurethane resin, an epoxy resin, and a polyester resin. A self-adhesive layer may be laminated on the cured layer. The self-adhesive layer may be a thermosetting resin which is an acrylic polymer, a silicone polymer or a urethane polymer, a mixture of a UV curable resin and a crosslinking agent, a mixture thereof, or a copolymer thereof.

According to the protective sheet for a touch screen panel having the curved frame portion of the present invention, the curved layer is formed on the curved surface portion of the protective sheet corresponding to the rim portion to prevent scattering of bent portions of the tempered glass, And the manufacturing process is simple. Further, the exposed portion of the protective sheet can be appropriately dealt with the shape of the rim portion without adhering foreign matter.

1 is a cross-sectional view illustrating a first protective sheet for a touch screen panel having a curved rim according to the present invention.
2 is a cross-sectional view illustrating a second protective sheet for a touch screen panel having a curved frame according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below can be modified into 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 enable those skilled in the art to more fully understand the present invention. Also, in the figures, the thicknesses of the films (layers, patterns) and regions may be exaggerated for clarity. Further, when it is mentioned that the film (layer, pattern) is in the "upper", "upper", "lower", "one side" of another film (layer, pattern) Or a different film (layer, pattern) may be interposed therebetween.

In the embodiment of the present invention, by forming a hardened layer on the curved surface portion of the protective sheet corresponding to the rim portion, it is possible to prevent scattering of the bent portion of the tempered glass, to prevent the foreign matter from entering into the gap, A protective sheet capable of appropriately coping with the shape of the rim portion without causing foreign matter to be exposed on the exposed portion of the sheet is presented. To this end, a process of forming a cured layer on the curved surface protective sheet and the curved surface protective sheet will be described in detail. The effect obtained from the curved surface protective sheet having the cured layer will be described in detail. Here, the curved surface protection sheet is applied to a touch screen panel having a frame portion that is thinner than the center portion and has a three-dimensional curved surface shape. At this time, the panel is called a curved surface touch screen panel, and the curved surface protection sheet adopts a curved surface reinforced glass in which a portion corresponding to the rim portion is bent.

1 is a cross-sectional view illustrating a first protective sheet 100 for a touch screen panel having a curved rim according to an embodiment of the present invention. For convenience of explanation, the vicinity of the rim (a) is enlarged and represented.

Referring to FIG. 1, a first protective sheet 100 is attached on a curved touch screen panel 10. The curved surface touch screen panel 10 is divided into a frame portion a on the outer side and a central portion b on the inner side with respect to the panel inflection point c1. The panel inflection point c1 is the boundary between the edge portions a and b having different curvatures. The central portion (b) may have a flat surface as shown, but it may be a curved surface having a predetermined curvature depending on the case. The rim portion (a) is a region where the degree of curvature of the curved surface is larger than that of the central portion (b). The rim portion (a) may have the same curvature along the periphery of the panel 10, and may have a partially different curvature. Typically, the panel 10 has a rectangular shape in plan view, and a rim portion (a) may be formed on both side edges or one side edge of the rectangular panel 10.

The first protective sheet 100 is composed of a shatterproof film 30 and a first hardened layer 40 bonded to the adhesive surface 24 of the tempered glass 20 on which the coating layer 22 is formed. The tempered glass 20 on which the coating layer 22 is formed is divided into an inner portion d on the inner side and a curved portion e on the outer side with respect to the sheet inflection point c2. The sheet inflection point c2 is the boundary between the inner part d and the curved part e having different curvatures. The inner side portion d may be a flat surface or a curved surface having a predetermined curvature in response to the shape of the center portion b of the curved surface touch screen panel 10. [ The curved surface portion e is a region where the degree of curvature of the curved surface is larger than that of the inner side portion d and has a width of W. [ The curved portion e may have the same curvature along the circumference and may have a partially different curvature to protect the rim portion a of the panel 10. The conventional panel 10 may have a rectangular shape in plan view and a curved portion e may cover the entire circumference, both side edges, or one side edge of the square type panel 10.

The panel inflection point c1 and the sheet inflection point c2 may not coincide with each other with respect to the panel 10. [ For example, the sheet inflection point c2 may be located outside the panel 10, as compared to the panel inflection point c1. The positional deviation of the panel inflection point c1 and the sheet inflection point c2 can be appropriately adjusted according to the shape of the curved touch screen panel 10 to which the first protective sheet 100 of the present invention is applied. In other words, the shape of the curved portion e does not necessarily coincide with the shape of the rim portion a. Accordingly, the first protective sheet 100 according to the embodiment of the present invention can appropriately cope with the curved portion e according to the shape of the rim portion a.

The tempered glass 20 is preferably a chemically reinforced optical glass, and the curved portion e is not limited thereto, but may be manufactured by etching, injection, or the like. The coating layer 22 may impart characteristics such as fingerprint prevention, anti-reflection, blue light blocking, electromagnetic wave blocking, and privacy. For example, a fluorine-based coating liquid may be wet-coated, or may be dry-coated by vacuum deposition to form a fingerprint-preventing coating layer that provides a fingerprint-proofing function. There may be an antireflection layer on which an inorganic compound is deposited to prevent reflection between the tempered glass 20 and the anti-fingerprint coating layer. Further, the coating layer 22 may include an antimicrobial coating layer that has antibacterial properties. As such, the coating layer 22 can cause the first protective sheet 100 to exhibit various functions.

The anti-scattering film 30 is bonded to the adhesive surface 24 of the inner side portion d of the first protective sheet 100. The shatterproof film 30 is a transparent polymer film coated with a transparent adhesive such as OCA. The transparent polymer film may be formed of one or any of PET (PolyEthylene Terephthalate), PEN (PolyEthyleneNaphthalate), PES (PolyetherSulfone), PI (Polyimide), PAR (Polyarylate), PC (PolyCarbonate), PMMA (PolyMethylMethAcrylate) One or more. The anti-scattering film 30 may be entirely joined to the inner side portion d and may be drawn by the margin portion M to the inner side portion d. The margin M may vary depending on the shape of the rim portion a to which the first protective sheet 100 of the present invention is applied. If the curvature of the rim portion (a) is large, the margin (M) is preferably small. The structure and material of the scattering-prevention film 30 are well known, and a detailed description thereof will be omitted.

The print layer 26 and the first hardened layer 40 may be sequentially laminated on the adhesive surface 24 of the curved portion e of the first protective sheet 100. [ In some cases, the printing layer 26 may not be present. The print layer 26 may have various colors such as transparent, black, and white, and preferably has a width of 1 to 5 mm and a thickness of 4 to 10 탆. The printing layer 26 may be formed by a method such as silkscreen printing, pad printing, and the like. The width of the printing layer 26 is freely adjustable. If necessary, the width of the print layer 26 may be equal to, or wider or narrower than the width W of the curved portion e.

The first hardened layer 40 is bonded to the anti-scattering film 30 while covering the print layer 26. It is preferable that the thickness of the first cured layer 40 of the bonded portion is the same as that of the anti-scattering film 30. It is preferable that the contact surface 42 of the first hardened layer 40 in contact with the rim portion a substantially coincides with the profile of the rim portion a. Though not shown in the figure, the cured layer contact surface 42 may not completely coincide with the profile of the rim portion (a). Thereby, there may be a predetermined empty space in the cured layer contact surface 42 and the rim portion (a). The first hardened layer 40 is joined to the scattering prevention film 30 so that the first hardened layer 40 is extended to the inner side d by the margin M. [ The first hardened layer 40 can prevent the curved portion e of the first protective sheet 100 according to the embodiment of the present invention from being scattered by the damage.

The first cured layer 40 may be made of a cured resin selected from a thermosetting resin or an ultraviolet ray curable resin, and more preferably an ultraviolet ray curable resin. For example, an ultraviolet curing resin is prepared by blending various types of acrylic units and a UV curing catalyst such as a polyurethane resin, an epoxy resin or a polyester resin. As a specific example of the first cured layer 40 by ultraviolet rays, a urethane or acrylate oligomer, a reactive monomer, a photoinitiator and a leveling agent are mixed as an ultraviolet reactive coating material. The urethane acrylate oligomer has a formula containing an aliphatic, cyclic aliphatic, aromatic compound or an oligomer of these compounds, and polyester polyol or polyether polyol is included in the molecular structure.

As the reactive monomer, trimethylpropane triacrylate, hexane diol diacrylate, pentaerythritol triacrylate and dipentaerythritol hexaacrylate are mixed and adjusted at a suitable ratio in consideration of hardness and adhesive force. As the photoinitiator, a usual polymerization initiator which is activated by ultraviolet rays is used, and in particular, hydroxycyclohexyl phenyl ketone, benzophenol, and phenyl-2-hydroxy-2-phenylketone are mainly used. The first hardened layer 40 has high hardness and excellent elasticity, and there is no fear that harmful substances will be decomposed even for a long period of time.

The first cured layer 40 may have tackiness, but it is better not to be tacky. If there is no tackiness, the outer surface of the first protective sheet 100 is not damaged because foreign substances do not adhere to the exposed portion of the first cured layer 40. The first cured layer 40 is formed by using a coating method by ejection, a coating method using a pad, a coating method by digital printing, or the like.

The first protective sheet 100 according to the embodiment of the present invention prevents scattering of the curved portion e of the tempered glass corresponding to the rim portion. That is, the first hardened layer 40 firmly holds the curved portion e, so that even if the curved portion e is broken, the curved portion e is not scattered. The thickness of the first cured layer 40 is adjusted in accordance with the shape of the rim portion a so as to be brought into close contact with the rim portion a so that the distance between the first protective sheet 100 and the rim portion a It is possible to prevent foreign matter from entering into the gap. Since the first hardened layer 40 having a scattering prevention function is formed by a simple coating method, the manufacturing process is simple. The adhesion of the first cured layer 40 is reduced or eliminated so that no foreign matter is exposed to the exposed portion of the first cured layer 40. Further, since the pad inflection point c1 and the sheet inflection point c2 can be appropriately adjusted by utilizing the first hardened layer 40, and the margin M can be placed, it is possible to appropriately cope with the shape of the rim portion a .

2 is a cross-sectional view illustrating a second protective sheet 200 for a touch screen panel having a curved rim according to another embodiment of the present invention. For convenience of explanation, the vicinity of the rim (a) is enlarged and represented. At this time, the second protective sheet 200 is the same as the first protective sheet 100 except for the second cured layer 44, the self-adhesive layer 46 and the cured layer contact surface 48. Accordingly, detailed description of the same reference numerals will be omitted.

Referring to FIG. 2, the second protective sheet 200 is obtained by replacing the first cured layer 40 of the first protective sheet 100 with the second cured layer 44 and the self-adhesive layer 46. The self-adhesive layer 46 is bonded on the second cured layer 44 and is not exposed to the outside of the curved portion e, so that no foreign matter is adhered. The self-adhesive layer 46 adheres to itself without air bubbles even if the self-adhesive layer 46 has an adhesive force of about 0.1 gf / 25 mm to 500 gf / 25 mm and the self-adhesive layer 46 is placed on the touch screen panel 10 . The self-adhesive layer 46 is optically transparent and applies a pressure-sensitive adhesive which is cured by heat treatment or UV (ultraviolet ray). The pressure-sensitive adhesive is cured in a semi-solid state by heat treatment or UV treatment at a predetermined temperature and time. With the self-adhesive layer 46, the consumer can easily hand-hold the second protective sheet 200 to the curved portion e without bubbles.

The material of the self-adhesive layer 46 varies within the technical spirit of the present invention, but it may be a thermosetting resin which is an acrylic polymer, a silicone-based polymer or a urethane-based polymer, an adhesive mixed with an ultraviolet-curing resin and a crosslinking agent, desirable. In some cases, the physical properties of the self-adhesive layer 46 may be improved by mixing a functional material such as silica gel, nanoparticles and an antistatic agent into the self-adhesive layer 46. Further, the optical characteristic can be improved by adding particles forming a quantum dot to the self-adhesive layer 46.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the scope of the present invention. It is possible.

10; A curved touch screen panel 20; tempered glass
22; Coating layer 24; Adhesive side
26; A printing layer 30; Shatterproof film
40, 44; The first and second cured layers
42, 48; Hardened layer adhesion layer
46; Self-adhesive layer
a; Border b; center
c1, c2; Pad and sheet inflection point
d; Inner side e; Curved portion
M; margin

Claims (12)

1. A protective sheet for covering a curved touch screen panel having a curved rim,
Wherein the protective sheet comprises:
A tempered glass comprising a curved portion having a large degree of warpage and an inner portion located inside the curved portion and having a degree of warpage smaller than that of the curved portion; And
And a cured layer formed on the curved surface portion facing the rim portion, the cured layer being hardened by curing, wherein a shatterproof film is bonded to the adhesion surface of the inner portion, and the cured layer is contacted with the shatterproof film A protective sheet for a touch screen panel with a rim. The protective sheet for a touch screen panel according to claim 1, wherein the rim portion has a curvature along the periphery of the panel or a curvature partly different from that of the rim. The protective sheet for a touch screen panel according to claim 1, wherein the rim portion is formed at both side edges or one side edge of a rectangular panel. The protective sheet for a touch screen panel according to claim 1, wherein the inner side is flat or curved. The protective sheet for a touch screen panel according to claim 1, wherein the inflection point of the panel and the inflection point of the protective sheet do not coincide with each other with respect to the panel. delete delete The protective sheet for a touch screen panel according to claim 1, wherein a thickness of the cured layer contacting the anti-scattering film is the same. The protective sheet for a touch screen panel according to claim 1, wherein the cured layer is made of an ultraviolet curable resin. The protective sheet for a touch screen panel according to claim 1, wherein the cured layer is formed by combining an acrylic unit and an ultraviolet curing catalyst in one of polyurethane resin, epoxy resin, and polyester resin. The protective sheet for a touch screen panel according to claim 1, wherein a self-adhesive layer is laminated on the cured layer. The touch panel of claim 11, wherein the self-adhesive layer is a thermosetting resin that is an acryl-based polymer, a silicone-based polymer, or a urethane-based polymer, a mixture of an ultraviolet-curable resin and a crosslinking agent or a mixture thereof or a copolymer thereof. Protective sheet for screen panel.
KR1020150051512A 2015-04-13 2015-04-13 Protecting sheet for touch screen panel having curved surface of edge part KR101657136B1 (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
KR200485672Y1 (en) * 2017-10-25 2018-02-06 (주)케이디랩 Screen protection tempered glass for curved mobile device
KR20180031270A (en) * 2016-09-19 2018-03-28 주식회사 인터벡스테크놀로지 The curved cover glass, apparatus and manufacture method for adhering film on cutting edge of curved cover glass
WO2018155888A1 (en) * 2017-02-27 2018-08-30 삼성전자 주식회사 Display having curved area, and electronic device comprising same
WO2018174415A1 (en) * 2017-03-21 2018-09-27 Samsung Electronics Co., Ltd. Protective film for electronic device and window assembly using the same
WO2019142950A1 (en) * 2018-01-16 2019-07-25 (주)화이트스톤 Liquid crystal screen protector for smart device and attaching device therefor
WO2019231040A1 (en) * 2018-06-01 2019-12-05 주식회사 더하기 Protective film structure and method for bonding same
WO2021162322A1 (en) * 2020-02-10 2021-08-19 삼성전자 주식회사 Electronic device including display
US11203182B2 (en) * 2017-01-17 2021-12-21 Sekisui Chemical Co., Ltd. Filling-bonding material, protective sheet-equipped filling-bonding material, laminated body, optical device, and protective panel for optical device

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KR101221441B1 (en) * 2012-06-07 2013-01-11 주식회사 슈피겐에스지피 Protective film for disply pannel of portable electronic device with curved surface
KR20140013155A (en) * 2012-07-19 2014-02-05 (주)발품 Protection cover of portable terminal made by touch screen to curved surface and it's manufacture method
KR101484452B1 (en) * 2014-08-25 2015-02-13 주식회사 맥스젠테크놀로지 Touch screen protect galss and Method for manufacturing the same

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KR20120029960A (en) * 2010-09-17 2012-03-27 공석태 Touch screen panel
KR101221441B1 (en) * 2012-06-07 2013-01-11 주식회사 슈피겐에스지피 Protective film for disply pannel of portable electronic device with curved surface
KR20140013155A (en) * 2012-07-19 2014-02-05 (주)발품 Protection cover of portable terminal made by touch screen to curved surface and it's manufacture method
KR101484452B1 (en) * 2014-08-25 2015-02-13 주식회사 맥스젠테크놀로지 Touch screen protect galss and Method for manufacturing the same

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101885153B1 (en) * 2016-09-19 2018-09-06 주식회사 인터벡스테크놀로지 The curved cover glass, apparatus and manufacture method for adhering film on cutting edge of curved cover glass
KR20180031270A (en) * 2016-09-19 2018-03-28 주식회사 인터벡스테크놀로지 The curved cover glass, apparatus and manufacture method for adhering film on cutting edge of curved cover glass
US11203182B2 (en) * 2017-01-17 2021-12-21 Sekisui Chemical Co., Ltd. Filling-bonding material, protective sheet-equipped filling-bonding material, laminated body, optical device, and protective panel for optical device
CN110383166A (en) * 2017-02-27 2019-10-25 三星电子株式会社 With the display for being bent region and including the electronic equipment of the display
WO2018155888A1 (en) * 2017-02-27 2018-08-30 삼성전자 주식회사 Display having curved area, and electronic device comprising same
WO2018174415A1 (en) * 2017-03-21 2018-09-27 Samsung Electronics Co., Ltd. Protective film for electronic device and window assembly using the same
CN110402403A (en) * 2017-03-21 2019-11-01 三星电子株式会社 Protective film for electronic device and the window assembly using the protective film
US10882285B2 (en) 2017-03-21 2021-01-05 Samsung Electronics Co., Ltd. Protective film for electronic device and window assembly using the same
CN110402403B (en) * 2017-03-21 2022-08-26 三星电子株式会社 Protective film for electronic device and window assembly using the same
KR200485672Y1 (en) * 2017-10-25 2018-02-06 (주)케이디랩 Screen protection tempered glass for curved mobile device
WO2019142950A1 (en) * 2018-01-16 2019-07-25 (주)화이트스톤 Liquid crystal screen protector for smart device and attaching device therefor
WO2019231040A1 (en) * 2018-06-01 2019-12-05 주식회사 더하기 Protective film structure and method for bonding same
WO2021162322A1 (en) * 2020-02-10 2021-08-19 삼성전자 주식회사 Electronic device including display

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