Protective film structure capable of reducing undesirable adhesion concavo-convex, film touch structure and protective film material belt

Abstract

The utility model discloses a protective film structure capable of reducing undesirable adhesion concavo-convex, which is used for a film touch screen, and the film touch screen is provided with a visible area and a peripheral area. The protective film structure comprises a first protective film and a second protective film, the first protective film comprises a first protective area and a second protective area, the first protective area corresponds to a visible area of the film touch screen, and the second protective area corresponds to a peripheral area of the film touch screen; and the second protective film is arranged on the second protective area of the first protective film and exposes the first protective area of the first protective film. The protective film structure can reduce the concave-convex defect when the protective film structure is attached to the film touch screen. The utility model further provides a film touch structure and a protective film material belt. The protective film material belt comprises the protective film structure.

Description

Technical Field

[0001] The utility model relates to a touch technology, in particular to a protective film structure for reducing lamination concavoconvex defects, a film touch structure and a protective film material strip. Background Art

[0002] The existing touch screens are divided into two categories, one is the glass structure touch screen, and the other is the film structure touch screen. After continuous development and research, the technology of the film structure touch screen is becoming more and more mature. The manufacturing process of the film structure touch screen is screen printing, which is very simple and fast; the thickness is thinner; the cost of the film structure touch screen is lower, so the film structure touch screen has a high market share.

[0003] In order to protect the back of the film touch screen, the prior art will stick a protective film on the back of the film touch screen. For example, the Chinese patent with patent application number CN201821837136.8 discloses a film structure touch screen, including a glass cover plate and a film touch layer stacked from top to bottom; the top surface of the film touch layer has an ink layer, and the ink layer is located on the periphery of the film touch layer; there is an optical adhesive layer between the glass cover plate and the film touch layer, and the optical adhesive layer covers the ink layer of the film touch layer. The touch screen also includes a protective film layer, which is located at the bottom of the film touch layer and covers the ITO conductive pattern. The protective film layer can protect the ITO conductive pattern of the film touch layer on the one hand to prevent it from being exposed to the outside, and on the other hand, it can add additional functions.

[0004] However, since the film substrate of the film touch screen is very thin, only 0.05mm thick, when the protective film is attached to the back of the film touch screen, if foreign matter or bubbles enter, it will cause defective bumps on the surface of the film touch screen. The defective bump ratio of some models is as high as more than 10%, seriously affecting the yield. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a protective film structure, which can reduce the unevenness when laminating with a film touch screen.

[0006] The utility model also provides a film touch structure and a protective film material strip, comprising the protective film structure.

[0007] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0008] A protective film structure for reducing poor lamination concavoconvexity is used for a film touch screen, wherein the film touch screen has a visible area and a peripheral area; the protective film structure comprises:

[0009] A first protective film, comprising a first protective area and a second protective area, wherein the first protective area corresponds to a visible area of ​​the film touch screen, and the second protective area corresponds to a peripheral area of ​​the film touch screen;

[0010] The second protection film is disposed on the second protection region of the first protection film and exposes the first protection region of the first protection film.

[0011] Furthermore, the first protective film is a non-adhesive protective film.

[0012] Furthermore, the first protective film is a PET protective film, a PI protective film, a PP protective film, a PVC protective film or a PE protective film.

[0013] Furthermore, the second protective film is a high-viscosity protective film.

[0014] Furthermore, the second protective film is a double-sided adhesive tape or a foam tape.

[0015] A film touch structure comprises a film touch screen and the above-mentioned protective film structure, wherein the protective film structure is arranged on the back of the film touch screen, and the second protective film of the protective film structure faces the film touch screen, so that an air layer is formed between the visible area of ​​the film touch screen and the first protective area of ​​the first protective film.

[0016] Furthermore, the film touch structure also includes a protective cover plate, which is arranged on the front side of the film touch screen and includes a light-transmitting area and a light-shielding area, wherein the light-transmitting area corresponds to the visible area of ​​the film touch screen, and the light-shielding area corresponds to the peripheral area of ​​the film touch screen; and light-shielding ink is provided on the peripheral area of ​​the protective cover plate.

[0017] A protective film material strip comprises a release film and a plurality of the above-mentioned protective film structures, wherein each protective film structure is arranged on the release film, and a second protective film of each protective film structure faces the release film.

[0018] Furthermore, the protective film strip also includes a winding core, the release film is wound outside the winding core, and its side surface opposite to each protective film structure faces the winding core; each protective film structure is arranged in sequence along the winding direction of the release film.

[0019] Furthermore, the winding core is a hollow winding drum.

[0020] The utility model has the following beneficial effects: the protective film structure of the utility model is composed of a double-layer protective film, wherein the first protective film mainly plays a protective role for the film touch screen, and the second protective film mainly plays a supporting role for the first protective film. After being attached to the back of the film touch screen, the second protective film can support the first protective film at a certain distance relative to the film touch screen, so that an air layer is formed between the first protection area of ​​the first protective film and the visible area of ​​the film touch screen. Since the first protective film is not in direct contact with the film touch screen, even if foreign matter or bubbles enter, no concave and convex defects will appear on the visible area of ​​the film touch screen, and the peripheral area of ​​the film touch screen will be covered by the light-shielding ink on the protective cover plate, and even if concave and convex defects appear, it will not affect the appearance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front structure of the protective film structure provided by the utility model.

[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the AA section in the protective film structure shown.

[0023] Figure 3 This is a schematic diagram of the stacking structure of the film touch structure provided by the utility model.

[0024] Figure 4 This is a schematic diagram of the stacking structure of another film touch structure provided by the utility model.

[0025] Figure 5 This is a schematic structural diagram of the protective film strip provided by the utility model. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1

[0031] A protective film structure for reducing lamination unevenness, used for Figure 3 The film touch screen 10 shown in the figure has a visible area 11 and a peripheral area 12; Figure 1 and 2 As shown, the protective film structure 20 includes:

[0032] The first protective film 21 includes a first protective area 211 and a second protective area 212, wherein the first protective area 211 corresponds to the visible area 11 of the film touch screen 10, and the second protective area 212 corresponds to the peripheral area 12 of the film touch screen 10;

[0033] The second protection film 22 is disposed on the second protection region 212 of the first protection film 21 and exposes the first protection region 211 of the first protection film 21 .

[0034] The protective film structure 20 of the utility model is composed of a double-layer protective film, wherein the first protective film 21 mainly plays a protective role for the film touch screen 10, and the second protective film 22 mainly plays a supporting role for the first protective film 21. After being attached to the back of the film touch screen 10, the second protective film 22 can support the first protective film 21 at a certain distance relative to the film touch screen 10, so that an air layer 200 is formed between the first protection area 211 of the first protective film 21 and the visible area 11 of the film touch screen 10. Since the first protective film 21 is not in direct contact with the film touch screen 10, even if foreign matter or bubbles enter, no concave and convex defects will appear on the visible area 11 of the film touch screen 10, and the peripheral area 12 of the film touch screen 10 will be covered by the light-shielding ink on the protective cover when it is finally assembled, and even if concave and convex defects appear, it will not affect the appearance of the product.

[0035] The peripheral area 12 of the film touch screen 10 surrounds the visible area 11 thereof, and correspondingly, the second protection area 212 of the first protection film 21 also surrounds the first protection area 211 thereof, that is, the second protection film 22 surrounds the first protection area 211 of the first protection film 21 .

[0036] Preferably, the first protective film 21 is a non-adhesive protective film, and the second protective film 22 is a high-adhesive protective film. During lamination, the first protective film 21 is fixed to the back of the film touch screen 10 by the high-adhesive bonding of the second protective film 22 .

[0037] In this embodiment, since the first protective film 21 covers the visible area 11 of the film touch screen 10, a high-transmittance protective film is preferably used, which may be, but not limited to, a PET protective film, a PI protective film, a PP protective film, a PVC protective film or a PE protective film. Since the second protective film 22 only covers the peripheral area 12 of the film touch screen 10, there is no requirement for transmittance, and it only needs to meet the high viscosity requirement, and may be, but not limited to, a double-sided adhesive tape or a foam tape.

[0038] Embodiment 2

[0039] like Figure 3 As shown, a film touch structure includes a film touch screen 10 and the above-mentioned protective film structure 20, wherein the protective film structure 20 is arranged on the back of the film touch screen 10, and the second protective film 22 of the protective film structure 20 faces the film touch screen 10, so that an air layer 200 is formed between the visible area 11 of the film touch screen 10 and the first protective area 211 of the first protective film 21.

[0040] The film touch structure of the present invention adopts a protective film structure 20 with a double-layer protective film to protect the back of the film touch screen 10, wherein the first protective film 21 of the film touch screen 10 mainly plays a protective role of the film touch screen 10, and the second protective film 22 of the film touch screen 10 mainly plays a supporting role of the first protective film 21; after the film touch screen 10 is attached to the back of the film touch screen 10, the second protective film 22 can support the first protective film 21 relative to the film touch screen 10 by a certain distance, so that an air layer 200 is formed between the first protective area 211 of the first protective film 21 and the visible area 11 of the film touch screen 10. Since the first protective film 21 is not in direct contact with the film touch screen 10, even if foreign matter or bubbles enter, no concave and convex point defects will appear on the visible area 11 of the film touch screen 10, and the peripheral area 12 of the film touch screen 10 will be covered by the light-shielding ink on the protective cover plate 30 when it is finally assembled, and even if concave and convex point defects appear, it will not affect the product appearance.

[0041] like Figure 4 As shown, the film touch structure also includes a protective cover 30, which is arranged on the front side of the film touch screen 10, including a light-transmitting area and a light-shielding area, wherein the light-transmitting area corresponds to the visible area 11 of the film touch screen 10, and the light-shielding area corresponds to the peripheral area 12 of the film touch screen 10; and a light-shielding ink 31 is provided on the peripheral area 12 of the protective cover 30.

[0042] The light-shielding ink 31 is preferably black ink, and its OD value (absorbance) should be guaranteed to be above 4 to meet the light-shielding effect. The thickness of the light-shielding ink 31 is between 1.5-1.9 μm, and the number of layers is at least two. If the light-shielding property of the material of the light-shielding ink 31 is low, the thickness of the light-shielding ink 31 can be appropriately increased. If the light-shielding property of the material of the light-shielding ink 31 is high, the thickness of the light-shielding ink 31 can be appropriately reduced, and it should not be limited to this.

[0043] In this embodiment, the protective cover plate 30 is attached to the front surface of the film touch screen 10 by means of OCA optical adhesive 40 .

[0044] The film touch screen 10 includes a film base film, a transparent sensor circuit and a metal wiring. The transparent sensor circuit is formed by a transparent conductive film (such as an ITO conductive film, an AZO conductive film or a ZnO conductive film) through a patterning process such as laser etching or yellow light etching, and the metal wiring is formed by a metal conductive film (such as an aluminum conductive film, a molybdenum conductive film or a molybdenum aluminum molybdenum conductive film) through a patterning process such as laser etching or yellow light etching. The transparent sensor circuit and the metal wiring are connected, wherein the transparent sensor circuit is located on a visible area 11 of the film touch screen 10, and the metal wiring is located on a peripheral area 12 of the film touch screen 10.

[0045] The film touch screen 10 may adopt a GF structure, a GFF structure or a G1F structure; if the film touch screen 10 adopts a GF structure, the film touch screen 10 has only one film base film, and the transparent sensor circuit and the metal wiring are both made on the back of the film base film; if the film touch screen 10 adopts a GFF structure, the film touch screen 10 has two film base films, a part of the transparent sensor circuit and the metal wiring are made on the back of one of the film base films, and another part of the transparent sensor circuit and the metal wiring are made on the back of the other film base film; if the film touch screen 10 adopts a G1F structure, the film touch screen 10 has only one film base film, a part of the transparent sensor circuit and the metal wiring are made on the back of the protective cover 30, and another part of the transparent sensor circuit and the metal wiring are made on the back of the film base film.

[0046] Embodiment 3

[0047] like Figure 5 As shown, a protective film strip includes a release film 50 and a plurality of the above-mentioned protective film structures 20 , each of the protective film structures 20 is disposed on the release film 50 , and the second protective film 22 of each of the protective film structures 20 faces the release film 50 .

[0048] The protective film material strip of the present invention sets multiple protective film structures 20 on the release film 50. The release film 50 protects the second protective film 22 of each protective film structure 20 before film pasting to prevent the second protective film 22 from being contaminated by dust, fingerprints, etc., and facilitates tearing off each protective film structure 20 from the release film 50 when film pasting.

[0049] The protective film strip also includes a winding core 60 , the release film 50 is wound outside the winding core 60 , and the side surface opposite to each protective film structure 20 faces the winding core 60 ; each protective film structure 20 is arranged in sequence along the winding direction of the release film 50 .

[0050] In implementation, the winding core 60 is preferably a hollow winding drum so as to match with the film laminating equipment and reduce the manufacturing cost; by arranging a plurality of protective film structures 20 in sequence on the release film 50 along the winding direction of the release film 50, and then winding the release film 50 on the winding core 60, so as to facilitate placing the protective film strip on the film laminating equipment through the winding core 60 during film laminating, and automatically pulling out the protective film structure 20 on the release film 50 under the drive of the film laminating equipment and realizing automatic film laminating on the film touch screen 10.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A protective film structure for reducing poor lamination, used for a film touch screen, wherein the film touch screen has a visible area and a peripheral area, characterized in that: The protective film structure comprises: A first protective film, comprising a first protective area and a second protective area, wherein the first protective area corresponds to a visible area of ​​the film touch screen, and the second protective area corresponds to a peripheral area of ​​the film touch screen; The second protection film is disposed on the second protection region of the first protection film and exposes the first protection region of the first protection film.

2. The protective film structure according to claim 1, characterized in that: The first protective film is a non-adhesive protective film.

3. The protective film structure according to claim 1 or 2, characterized in that: The first protective film is a PET protective film, a PI protective film, a PP protective film, a PVC protective film or a PE protective film.

4. The protective film structure according to claim 1, characterized in that: The second protective film is a high-viscosity protective film.

5. The protective film structure according to claim 1 or 4, characterized in that: The second protective film is a double-sided adhesive tape or a foam tape.

6. A film touch structure, characterized in that: It comprises a film touch screen and the protective film structure as claimed in claim 1, wherein the protective film structure is arranged on the back of the film touch screen, and the second protective film of the protective film structure faces the film touch screen, so that an air layer is formed between the visible area of ​​the film touch screen and the first protective area of ​​the first protective film.

7. The film touch structure according to claim 6, characterized in that: The film touch structure also includes a protective cover plate, which is arranged on the front side of the film touch screen and includes a light-transmitting area and a light-shielding area. The light-transmitting area corresponds to the visible area of ​​the film touch screen, and the light-shielding area corresponds to the peripheral area of ​​the film touch screen. Light-shielding ink is provided on the peripheral area of ​​the protective cover plate.

8. A protective film strip, characterized in that: The invention comprises a release film and a plurality of protective film structures according to any one of claims 1 to 4, wherein each protective film structure is arranged on the release film, and the second protective film of each protective film structure faces the release film.

9. The protective film strip according to claim 8, characterized in that: The protective film material strip also includes a winding core, the release film is wound outside the winding core, and the side surface of the release film opposite to each protective film structure faces the winding core; each protective film structure is arranged in sequence along the winding direction of the release film.

10. The protective film strip according to claim 9, characterized in that: The winding core is a hollow winding drum.

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