CN114479695A

CN114479695A - Protection film structure and display panel

Info

Publication number: CN114479695A
Application number: CN202210039418.8A
Authority: CN
Inventors: 陆静茹
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-05-13
Anticipated expiration: 2042-01-13
Also published as: CN114479695B

Abstract

The embodiment of the application relates to the technical field of display, in particular to a protective film structure and a display panel, wherein the protective film structure comprises a protective film body and a tearing-off handle, and the tearing-off handle is arranged on one side of the protective film body and is integrally formed with the protective film body; the protective film body is provided with a first cutting edge, the tearing handle is provided with a first edge connected with the first cutting edge, and an included angle between the first cutting edge and the first edge is an obtuse angle. The embodiment of the application can solve the problem that the protective film body is easy to tear and difficult to tear, and reduces the tearing difficulty of the protective film body.

Description

Protection film structure and display panel

Technical Field

The embodiment of the application relates to the technical field of display, in particular to a protective film structure and a display panel.

Background

At present, with the continuous development of display technology, people have higher and higher requirements on the external dimension of the display screen of the electronic device. Especially for mobile electronic devices such as mobile phones and tablet computers, the display panel is required to have a narrow frame and a high screen ratio.

In order to improve the screen occupation ratio of the display panel, the flexible circuit board provided with the driving chip is generally bonded to the bonding area of the display panel, and then the flexible circuit board arranged in the bonding area is folded back to the non-display side of the display panel, so as to realize a narrow frame design. The flexible circuit board is bonded with the display panel through the adhesive layer attached to the surface of the flexible circuit board. Generally, when the flexible circuit board leaves a factory, a protective film is attached to the surface of the adhesive layer of the flexible circuit board to ensure the adhesiveness of the adhesive layer of the flexible circuit board. When in use, the protective film and the adhesive layer are torn off through the tearing-off handle at one side of the protective film.

However, since the flexible printed circuit board can be bent and has different shapes after being bent, the protective film attached to the flexible printed circuit board has different shapes, and the protective film is easily torn and is difficult to tear when the protective film is torn by the tearing handle.

Disclosure of Invention

The embodiment of the application provides a protection film structure and a display panel to solve the problem that the protection film is easy to tear and is difficult to tear.

The embodiment of the application provides a protective film structure, which comprises a protective film body and a tearing-off handle, wherein the tearing-off handle is arranged on one side of the protective film body and is integrally formed with the protective film body; the protective film body is provided with a first cutting edge, the tearing handle is provided with a first edge connected with the first cutting edge, and an included angle between the first cutting edge and the first edge is an obtuse angle.

In addition, the included angle between the first cutting edge and the first edge is 120-130 degrees.

In addition, a first arc chamfer is arranged at the joint of the first cutting edge and the first edge; preferably, the arc radius of the first arc chamfer is 3-5 mm.

In addition, the tearing-off handle is provided with a second edge opposite to the first edge, the protective film body is provided with a first edge, the first edge and the first cutting edge are respectively positioned at two adjacent sides of the tearing-off handle, and the included angle between the first edge and the second edge is 90-130 degrees; preferably, the included angle between the first edge and the second edge is 120-130 degrees; preferably, the first edge and the second edge are connected through a first circular arc chamfer.

In addition, the protective film structure also comprises a second cutting edge, and the second cutting edge is positioned on one side of the first edge close to the second edge; one end of the second cutting edge extends to the end part which is away from the protective film body from the tearing handle, and the other end of the second cutting edge extends into the protective film body.

In addition, in the direction that the tearing handle points to the protection film body, the second cut edge in the protection film body extends in the first direction, and the length of the second cut edge in the protection film body is smaller than or equal to one half of the width of the protection film body.

In addition, the protective film structure also comprises a third cutting edge, and the third cutting edge is positioned in the protective film body and is connected with the other end of the second cutting edge; the third cutting edge is curved away from the first cutting edge.

In addition, the protective film body comprises a fourth cutting edge, a fifth cutting edge and a sixth cutting edge which are connected in sequence; the fourth cutting edge is connected with the first cutting edge, and the first cutting edge, the fourth cutting edge, the fifth cutting edge and the first edge form a first area along an extension line in the direction pointing to the protective film body; a second side and a third side connected in sequence; the second edge is connected with the first edge, the third edge is connected with the sixth cutting edge, and the first edge, the second edge, the third edge and the first edge form a second area in a surrounding mode along an extending line pointing to the direction of the protective film body.

In addition, in the direction perpendicular to the direction of the tearing-off handle pointing to the protective film body, the width of the second area on the side of the second cutting edge close to the first cutting edge is smaller than the width of the second area on the side of the second cutting edge far away from the first cutting edge.

Correspondingly, the embodiment of the application also provides a display panel, which comprises a circuit layer, a flexible circuit board, an adhesive layer and any one of the protection film structures, wherein the circuit layer and the flexible circuit board are arranged in a stacked mode; the adhesive layer is arranged between the circuit layer and the flexible circuit board, and the protective film structure is arranged on one side, far away from the flexible circuit board, of the adhesive layer.

In addition, the protective film body comprises a fourth cutting edge, a fifth cutting edge and a sixth cutting edge which are connected in sequence; the fourth cutting edge is connected with the first cutting edge; the orthographic projection of an area defined by the first cutting edge, the fourth cutting edge, the fifth cutting edge and the first edge along the extension line in the direction pointing to the protective film body on the flexible circuit board is a first orthographic projection, and the orthographic projection of the adhesive layer on the flexible circuit board is a second orthographic projection; the first orthographic projection and the second orthographic projection have no overlapping region.

In addition, the protective film structure comprises a second cutting edge and a third cutting edge, one end of the second cutting edge extends to the end part of the tearing handle far away from the protective film body, and the other end of the second cutting edge extends into the protective film body; the orthographic projection of the second cutting edge on the flexible circuit board and the second orthographic projection have an overlapping area; in the direction perpendicular to the direction of the tearing handle pointing to the protective film body, the width of the adhesive layer on one side of the second cutting edge close to the first cutting edge is smaller than the width of the adhesive layer on the second cutting edge far away from the first cutting edge; the third cutting edge is positioned in the protective film body and is connected with the other end of the second cutting edge; the third cutting edge is curved away from the first cutting edge.

The technical scheme provided by the embodiment of the application has at least the following advantages:

in the technical scheme of the protective film structure provided by the embodiment of the application, the protective film structure comprises a protective film body and a tearing-off handle, wherein the tearing-off handle is arranged on one side of the protective film body and is integrally formed with the protective film body; the protective film body is provided with a first cutting edge, the tearing handle is provided with a first edge connected with the first cutting edge, and an included angle between the first cutting edge and the first edge is an obtuse angle. This application embodiment tears from the first cutting edge of handle through forming the connection on the protection film body, and first cutting edge is the obtuse angle with the contained angle of tearing between the first edge from the handle, reduces the tearing stress of first cutting edge and first edge junction, avoids tearing stress concentration at first cutting edge and first edge junction to be favorable to tearing of protection film body, first cutting edge is difficult for being torn with first edge junction simultaneously. The contained angle between first cutting edge and the first edge is the obtuse angle, and the atress angle increase of the protection film structure's of this application embodiment dyestripping stress point, the tearing stress of first cutting edge and first edge junction disperses on to the protection film body on dyestripping stress point periphery for tearing stress reduces, reduces the tearing of protection film body and leaves the degree of difficulty, solves the protection film body and easily tears, is difficult to tear the problem of leaving.

Drawings

One or more embodiments are illustrated by corresponding figures in the drawings, which are not to be construed as limiting the embodiments, unless expressly stated otherwise, and the drawings are not to scale.

FIG. 1 is a schematic structural view of one embodiment of a protective film structure in the related art;

FIG. 2 is a schematic structural diagram of one embodiment of a protective film structure according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of another embodiment of a protective film structure according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another embodiment of a protective film structure according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of another embodiment of a protective film structure according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another embodiment of a protective film structure according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of yet another embodiment of a protective film structure according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of yet another embodiment of a protective film structure in an example of the present application;

FIG. 9 is a schematic structural diagram of yet another embodiment of a protective film structure in an example of the present application;

FIG. 10 is a schematic diagram illustrating a structure of a display panel bonded to a flexible circuit board according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a flexible circuit board and a protection film structure according to an embodiment of the present application;

fig. 12 is a top view of a protective film structure attached to a flexible circuit board according to an embodiment of the present disclosure.

Detailed Description

The prior art shows that the protective film is easy to tear and difficult to tear.

Analysis finds that one of the reasons causing the protective film to be easily torn and difficult to tear off is that in order to realize a narrow frame, one end of the flexible circuit board is usually bonded to the bonding area of the display panel, and the other end of the flexible circuit board is folded back to the non-display side of the display panel, wherein the flexible circuit board is reliably bonded to the display panel through the glue layer on the surface of the flexible circuit board. In order to protect the adhesiveness of the adhesive layer of the flexible circuit board, a protective film is attached to the surface of the flexible circuit board when the flexible circuit board leaves a factory, and the protective film is torn away from the adhesive layer through a tearing handle on one side of the protective film when the flexible circuit board is used. However, since the flexible circuit board can be bent and has different shapes after being bent, the protective film attached to the flexible circuit board also has different shapes, and the protective film is easily torn and is difficult to tear when the protective film is torn by the tearing handle.

Referring to fig. 1, which is a schematic structural diagram of a protective film structure in the related art, as shown in fig. 1, the protective film structure 11 includes a protective film body 111 and a peeling handle 112, and the peeling handle 112 is disposed on one side of the protective film body 111. The protective film body 111 has a cut edge 1111', the tearing handle 112 has a first edge 1121, and the cut edge 1111' is perpendicular to the first edge 1121, i.e. the included angle between the cut edge 1111' and the first edge 1121 is 90 °. When the protective film body 111 is torn by pulling the tearing handle 112, the tearing stress acting on the tearing handle 112 is mainly concentrated at the joint between the cut edge 1111 'and the first edge 1121, which easily causes the problem that the protective film body 111 at the joint between the cut edge 1111' and the first edge 1121 is torn, thereby causing the problem that the protective film body 111 is difficult to tear and not completely torn, and causing the tearing failure of the protective film body 111.

In order to improve the above problem, an embodiment of the present application provides a protective film structure, as shown in fig. 2 and fig. 3, a protective film structure 11 provided in an embodiment of the present application includes a protective film body 111 and a tear-off handle 112, where the tear-off handle 112 is disposed on one side of the protective film body 111 and is integrally formed with the protective film body 111; the protective film body 111 has a first cutting edge 1111, the peeling handle 112 has a first edge 1121 connected to the first cutting edge 1111, and an included angle between the first cutting edge 1111 and the first edge 1121 is an obtuse angle.

As shown in fig. 2 and 3, the included angle between the first cutting edge 1111 and the first edge 1121 is an obtuse angle.

It should be noted that the tearing handle 112 may be disposed on any side of the protective film body 111, as shown in fig. 2, the tearing handle 112 may be disposed on the right side of the protective film body 111, the tearing handle 112 may be rectangular, and the first edge 1121 is parallel to the width direction of the protective film body 111. As shown in fig. 3, tear-away handle 112 may be other shapes. Other shapes may be, for example, right triangles, diamonds, or other irregular shapes, etc.

It is to be understood that the shape of the protective film body 111 is not limited in the embodiments of the present application, and the shape of the protective film body 111 is consistent with the size of the electronic component or the electronic device to be protected by the protective film body 111. For example, the outer boundary of the protection film body 111 may coincide with the outer boundary of a Flexible Printed Circuit (FPC) or a Chip On Film (COF).

Here, the protective film body 111 and the tear-off handle 112 may be made of a material having high flexibility, such as polyethylene terephthalate (PET), polypropylene (PP), or Polystyrene (PS).

Specifically, the protective film body 111 may be cut with a tool, and the first cut edge 1111 is formed on the protective film body 111, so that the protective film body 111 can be torn along the first cut edge 1111 when the protective film body 111 is torn by the tear-off handle 112.

According to the embodiment of the application, the first cutting edge 1111 connected with the tearing handle 112 is formed on the protective film body 111, and the included angle between the first cutting edge 1111 and the first edge 1121 of the tearing handle 112 is an obtuse angle, so that the tearing stress at the joint of the other first cutting edge 1111 and the first edge 1121 is reduced, the concentration of the tearing stress at the joint of the first cutting edge 1111 and the first edge 1121 is avoided, the tearing of the protective film body 111 is facilitated, and meanwhile, the joint of the first cutting edge 1111 and the first edge 1121 is not easy to tear.

In some embodiments, the included angle between the first cutting edge 1111 and the first edge 1121 is between 120 ° and 130 °.

Note that the included angle between the first cutting edge 1111 and the first edge 1121 may be, for example, 120 °, 125 °, or 130 °.

In the protective film structure 11 in the embodiment of the present application, an included angle between the first cutting edge 1111 and the first edge 1121 is 120 ° to 130 °, and compared to the protective film structure 11 in which a stress angle of a stress point of a film tearing in the related art is 90 °, the stress angle of the stress point of the film tearing of the protective film structure 11 in the embodiment of the present application is greater than or equal to 120 °, the stress angle is increased, and a tearing stress at a connection between the first cutting edge 1111 and the first edge 1121 is dispersed to the protective film body 111 around the stress point of the film tearing, so that the tearing stress is reduced, a tearing difficulty of the protective film body 111 is reduced, and the film tearing is facilitated.

In some embodiments, there is a first rounded chamfer 1112 at the junction of the first cutting edge 1111 and the first edge 1121; preferably, the arc radius of the first arc chamfer 1112 is 3-5 mm.

The radius of the first rounded portion 1112 may be, for example, 3mm, 4mm, or 5 mm. The first arc chamfer 1112 is arranged to uniformly distribute the tearing stress at the connection between the first cutting edge 1111 and the first edge 1121 to the protective film body 111 around the connection between the first cutting edge 1111 and the first edge 1121 through the first arc chamfer 1112, so as to prevent the problem that the protective film body 111 at the connection between the first cutting edge 1111 and the first edge 1121 is torn due to stress concentration.

In the protective film structure 11 in the embodiment of the present application, the first cutting edge 1111 of the protective film body 111 is connected to the first edge 1121 of the tearing handle 112 through the first arc chamfer 1112, when the tearing handle 112 is pulled to a vertical state during film tearing, the connection between the first edge 1121 of the tearing handle 112 and the first cutting edge 1111 is a film tearing stress point, the first arc chamfer 1112 can disperse the tearing stress at the film tearing stress point, so as to reduce stress concentration, so that the protective film body 111 at the film tearing stress point is not easily torn, and the film tearing success rate is improved.

In some embodiments, as shown in fig. 4 and 5, the tearing handle 112 has a second edge 1122 opposite to the first edge 1121, the protective film body 111 has a first edge 1118, the first edge 1118 and the first cutting edge 1111 are respectively located at two adjacent sides of the tearing handle 112, and an included angle between the first edge 1118 and the second edge 1122 is 90 ° to 130 °; preferably, the included angle between the first edge 1118 and the second edge 1122 is 120-130 degrees; preferably, there is a second rounded chamfer 1112' at the junction of the first edge 1118 and the second edge 1122.

In some embodiments, the included angle between the first edge 1118 and the second edge 1122 is 90 ° to 130 °; preferably, the included angle between the first edge 1118 and the second edge 1122 is 120 ° to 130 °. As shown in fig. 4, the angle between the first edge 1118 and the second edge 1122 may be a right angle; as shown in fig. 5, the included angle between the first edge 1118 and the second edge 1122 may be an obtuse angle between 90 ° and 130 °. The first edge 1118 and the second edge 1122 are connected by the second arc chamfer 1112', and the tearing stress at the connection point of the first edge 1118 and the second edge 1122 in the embodiment of the present invention is uniformly dispersed to the protective film body 111 around the connection point of the first edge 1118 and the second edge 1122 by the second arc chamfer 1112', thereby preventing the problem that the protective film body 111 at the connection point of the first edge 1118 and the second edge 1122 is torn due to stress concentration.

In some embodiments, the arc radius of second arc chamfer 1112 'may be the same as the arc radius of first arc chamfer 1112, i.e., the arc radius of second arc chamfer 1112' may be 3mm, 4mm, or 5mm, for example.

In some embodiments, as shown in fig. 6, the protective film structure 11 may further include a second cut edge 1113, the second cut edge 1113 being located on a side of the first edge 1121 adjacent to the second edge 1122; one end of the second cut edge 1113 extends to the end of the tearing handle 112 away from the protection film body 111, and the other end of the second cut edge 1113 extends into the protection film body 111.

Specifically, the tear-off handle 112 and the protective film body 111 may be cut by a cutter, and the second cut edge 1113 may be formed on the tear-off handle 112 and the protective film body 111.

In some embodiments, one end of the second cut edge 1113 extends to the end of the tearing handle 112 away from the protective film body 111, so as to facilitate tearing away the protective film body 111 on the side of the second cut edge 1113 close to the first cut edge 1111 along the second cut edge 1113 when the tearing handle 112 is lifted upwards, and then the protective film body 111 on the side of the second cut edge 1113 away from the first cut edge 1111 is torn away, thereby achieving the tearing of the protective film body 111 as a whole.

This application embodiment will tear through second cutting limit 1113 and cut apart into upper portion and lower part from handle 112, also divide into upper portion and lower part with protection film body 111 simultaneously, tear earlier during the dyestripping and tear the upper portion of tearing from handle 112 and protection film body 111, thereby drive and tear the tearing of the lower part of handle 112 and protection film body 111, so, the main power of tearing from handle 112 and protection film body 111 junction has been dispersed, tear through the substep, the dyestripping area when having reduced the single dyestripping, the dyestripping success rate has been improved.

In other embodiments, as shown in fig. 7, the second cut edge 1113 divides the tearing handle 112 into an upper portion (a portion close to the first cut edge 1111) and a lower portion (a portion far from the first cut edge 1111), and the length of the upper portion of the tearing handle 112 is smaller than that of the lower portion of the tearing handle 112 in a direction perpendicular to the direction from the tearing handle 112 to the protective film body 111, so that when the upper portion of the tearing handle 112 is pulled, the end of the first edge 1121 of the tearing handle 112 is more easily pulled, and the tearing of the protective film body 111 on the side of the second cut edge 1113 close to the first cut edge 1111 is carried along, and the difficulty in tearing the protective film body 111 is reduced.

Referring to fig. 8, in the direction of the tearing handle 112 pointing to the protective film body 111, the second cut edge 1113 located in the protective film body 111 extends in the first direction, and the length of the second cut edge 1113 located in the protective film body 111 is less than or equal to one half of the width of the protective film body 111.

In the direction of the tearing handle 112 pointing to the protection film body 111, i.e. the direction of the tearing handle 112 pointing to the protection film body 111 is taken as the first direction, the second cut edge 1113 of the embodiment of the present application extends in the first direction towards the protection film body 111, and the length of the second cut edge 1113 in the protection film body 111 is less than or equal to one-half of the width of the protection film body 111, so that, after the portion of the protective film body 111 on the side of the second cutting edge 1113 close to the first cutting edge 1111 is removed by the removing handle 112, since the portion of the protective film body 111 is removed, when the part of the protective film body 111 on the side of the second cutting edge 1113 far away from the first cutting edge 1111 is torn off, the labor can be saved, and the torn part of the protective film body 111 can drive the torn part of the protective film body 111 to be torn off, thereby reducing the tearing difficulty of the protective film body 111 and improving the film tearing success rate.

In some embodiments, with continued reference to fig. 8, the protective film structure 11 may further include a third cut edge 1114, the third cut edge 1114 being located inside the protective film body 111 and connected to the other end of the second cut edge 1113; the third cutting edge 1114 curves away from the first cutting edge 1111.

Specifically, the protective film body 111 may be cut by a cutter, and a third cutting edge 1114 connected to the second cutting edge 1113 may be formed on the protective film body 111.

The third cutting edge 1114 may be in an arc shape or a wave shape, and the arc-shaped third cutting edge 1114 helps to reduce the tearing stress at the joint of the second cutting edge 1113 and the third cutting edge 1114, prevent the protective film body 111 from being torn at the joint of the second cutting edge 1113 and the third cutting edge 1114, and help to tear the protective film body 111.

The third cutting edge 1114 of the embodiment of the application is bent towards the direction far away from the first cutting edge 1111, namely the bending direction of the third cutting edge 1114 is consistent with the film tearing direction, so that the tearing of the lower part of the protective film body 111 is facilitated; when the tear film is torn to the junction of the second cutting edge 1113 and the third cutting edge 1114, the arc-shaped third cutting edge 1114 can disperse the tearing stress at the junction of the second cutting edge 1113 and the third cutting edge 1114, so that the lower part of the protection film body 111 is easier to tear.

As shown in fig. 9, the protective film body 111 includes a fourth cut edge 1115, a fifth cut edge 1116, and a sixth cut edge 1117 which are connected in this order; the fourth cutting edge 1115 is connected with the first cutting edge 1111, and the first cutting edge 1111, the fourth cutting edge 1115, the fifth cutting edge 1116 and the extension line of the first edge 1121 in the direction pointing to the protective film body 111 enclose a first region 111 a; a second side 1119 and a third side 1120 connected in series; the second side 1119 is connected to the first side 1118, the third side 1120 is connected to the sixth cut side 1117, and the first side 1118, the second side 1119, the third side 1120, and the first edge 1121 surround the second region 111b along the extension line in the direction toward the protective film body 111.

Preferably, the area of the first region 111a is smaller than that of the second region 111 b.

Specifically, the protective film body 111 may be cut with a cutter to form a fourth cutting edge 1115, a fifth cutting edge 1116, and a sixth cutting edge 1117 on the protective film body 111; the first cut edge 1111, the fourth cut edge 1115, the fifth cut edge 1116, the sixth cut edge 1117 and the extension line of the first edge 1121 in the direction toward the protective film body 111 form a first region 111 a.

In the embodiment of the present application, the first edge 1118, the second edge 1119, the third edge 1120, and the first edge 1121 of the protection film body 111 form a second region 111b by enclosing with an extension line of the first edge 1121 in a direction pointing to the protection film body 111, and the second region 111b corresponds to the position of the adhesive layer 14 on the flexible circuit board, so that the protection film body 111 protects the adhesive layer 14; the first cut edge 1111, the fourth cut edge 1115, the fifth cut edge 1116 and the extension line of the first edge 1121 in the direction pointing to the protection film body 111 form a first region 111a, the first region 111a corresponds to the position of the driver chip on the flexible circuit board, and the protection film body 111 is attached to the side of the driver chip away from the flexible circuit board, so that the protection film body 111 protects the driver chip.

In some embodiments, in a direction perpendicular to the direction in which the tear-off handle 112 points toward the protective film body 111, the width of the second region 111b on the side of the second cut edge 1113 close to the first cut edge 1111 is smaller than the width of the second region 111b on the side of the second cut edge 1113 away from the first cut edge 1111.

As shown in fig. 8, the direction of the tearing handle 112 toward the protective film body 111 is the first direction, the direction perpendicular to the direction of the tearing handle 112 toward the protective film body 111 is the second direction, and in the second direction, the width of the second region 111b on the side of the second cut edge 1113 close to the first cut edge 1111 is smaller than the width of the second region 111b on the side of the second cut edge 1113 far from the first cut edge 1111. This application embodiment will tear away handle 112, protection film body 111 and divide into upper portion and lower part through second cutting limit 1113, because of second district 111b below sets up viscose layer 14 for when tearing away protection film body 111 along second cutting limit 1113, the part that second district 111b width is little tears earlier and leaves, drives tearing of the big part of second district 111b width again and leaves, reduces the dyestripping difficulty of protection film body 111 in the region of viscose layer 14 place.

The embodiment of the application provides a protection film structure, the first cutting edge 1111 of protection film body 111 is connected through first circular arc chamfer 1112 with the first edge 1121 that tears from handle 112, and first circular arc chamfer 1112 can disperse the tearing stress of first cutting edge 1111 and first edge 1121 junction, reduces stress concentration for protection film body 111 of tear film stress point department is difficult to be torn, improves the success rate of tearing the film. Meanwhile, the included angle between the first cutting edge 1111 and the first edge 1121 is 120 ° to 130 °, and compared with the protective film structure 11 in which the stress angle of the stress point of the film tearing is 90 ° in the related art, the stress angle of the stress point of the protective film structure 11 in the embodiment of the present application is increased, and the tearing stress at the connection between the first cutting edge 1111 and the first edge 1121 is dispersed to the protective film body 111 around the stress point of the film tearing, so that the tearing stress is reduced, the tearing difficulty of the protective film body 111 is reduced, and the film tearing is facilitated.

In addition, the third cut edge 1114 is bent away from the first cut edge 1111 by providing the second cut edge 1113 and the third cut edge 1114 on the peeling handle 112 and the protective film body 111. The tearing-off handle 112 is divided into an upper part (a part close to the first cutting edge 1111) and a lower part (a part far away from the first cutting edge 1111) by the second cutting edge 1113, and the length of the upper part of the tearing-off handle 112 is smaller than that of the lower part of the tearing-off handle 112 in the direction perpendicular to the direction from the tearing-off handle 112 to the protective film body 111, so that when the upper part of the tearing-off handle 112 is pulled, the end part of the first edge 1121 of the tearing-off handle 112 is more easily pulled, the tearing-off of the protective film body 111 on the side of the second cutting edge 1113 close to the first cutting edge 1111 is driven, and the tearing-off difficulty of the protective film body 111 is reduced. Meanwhile, the third cutting edge 1114 is bent to the direction far away from the first cutting edge 1111, so that the tearing difficulty of the lower part of the protective film body 111 is further reduced; when the tear film is torn to the junction of the second cutting edge 1113 and the third cutting edge 1114, the arc-shaped third cutting edge 1114 can disperse the tearing stress at the junction of the second cutting edge 1113 and the third cutting edge 1114, so that the lower part of the protection film body 111 is easier to tear.

The embodiment of the present application further provides a display panel, as shown in fig. 10, one end of the flexible circuit board 13 is connected to one end of the display panel 1, and the other end of the flexible circuit board 13 is folded back to the back side of the display panel 1. The display panel comprises a circuit layer, a flexible circuit board 13, an adhesive layer 14, and the protective film structure 11 (not shown in fig. 10) provided in any of the above embodiments.

In some embodiments, the wiring layer is disposed on the substrate, the adhesive layer 14 is disposed between the display panel 1 and the flexible circuit board 13; the protective film structure 11 is disposed on a side of the adhesive layer 14 away from the flexible circuit board 13, and is used for protecting an adhesive surface of the adhesive layer 14.

In some embodiments, the display panel 1 provided in the embodiments of the present application may be a self-luminous display panel, and the self-luminous display panel may be, for example, an organic light-emitting diode (OLED) display panel or a quantum dot electroluminescent diode (QLED) display panel.

In some embodiments, the display panel 1 provided in the embodiments of the present application may also be any electronic product with a display function, including but not limited to a mobile phone, a tablet computer, a digital camera, a notebook computer, a television, a vehicle-mounted display terminal, and other electronic devices. Since the display panel 1 provided in the embodiment of the present application has the technical effects of the technical solutions of the protective film structures in the embodiments, the same or corresponding structures and terms as those in the embodiments are not repeated herein.

As shown in fig. 11, the flexible circuit board 13 includes a substrate 131 and a copper foil layer 133 stacked on a foam adhesive layer 132 on the substrate 131, the protective film structure 11 and the adhesive layer 14 are both disposed on a side of the copper foil layer 133 away from the foam adhesive layer 132, for simultaneously protecting the foam adhesive layer 132 and the adhesive layer 14, an upper portion of the protective film structure 11 is attached to a side of the copper foil layer 133 away from the foam adhesive layer 132, and a lower portion of the protective film structure 11 is attached to a side of the adhesive layer 14 away from the foam adhesive layer 132; the outer boundary of the protection film structure 11 coincides with the outer boundary of the foam adhesive layer 132 and the outer boundary of the copper foil layer 133, so that the foam adhesive layer 132 and the copper foil layer 133 are protected.

The display panel 1 of the embodiment of the present application plays a role in protecting the foam adhesive layer 132, the copper foil layer 133 and the adhesive layer 14 of the flexible circuit board 13 through the above protection film structure 11, and after the protection film structure 11 is torn off, the flexible circuit board 13 can be reliably stuck to the bonding area of the display panel 1.

In some embodiments, the protective film body 111 includes: a fourth cut edge 1115, a fifth cut edge 1116, and a sixth cut edge 1117 connected in series; the fourth cutting edge 1115 is connected to the first cutting edge 1111; an orthogonal projection of a region surrounded by the first cut edge 1111, the fourth cut edge 1115, the fifth cut edge 1116 and an extension line of the first edge 1121 in a direction pointing to the protective film body 111 on the flexible circuit board 13 is a first orthogonal projection, and an orthogonal projection of the adhesive layer 14 on the flexible circuit board 13 is a second orthogonal projection; the first orthographic projection and the second orthographic projection have no overlapping region.

Specifically, a fourth cutting edge 1115, a fifth cutting edge 1116 and a sixth cutting edge 1117 may be sequentially formed on the protective film body 111 by using a tool, so that when the upper portion of the protective film body 111 is torn off, the protective film body 111 can be torn off along the first cutting edge 1111, the fourth cutting edge 1115, the fifth cutting edge 1116 and the sixth cutting edge 1117 to tear off a region surrounded by the first cutting edge 1111, the fourth cutting edge 1115, the fifth cutting edge 1116 and an extension line of the first edge 1121 in a direction toward the protective film body 111.

In the embodiment of the present application, an orthographic projection of an area surrounded by the first cutting edge 1111, the fourth cutting edge 1115, the fifth cutting edge 1116 and an extension line of the first edge 1121 in a direction pointing to the protection film body 111 on the flexible circuit board 13 is not overlapped with a projection of the adhesive layer 14 on the flexible circuit board 13, that is, the protection film body 111 is divided into an adhesive layer area and an adhesive layer free area, the adhesive layer area is an area where the adhesive layer 14 is located, and the adhesive layer free area is an area surrounded by the first cutting edge 1111, the fourth cutting edge 1115, the fifth cutting edge 1116 and an extension line of the first edge 1121 in a direction pointing to the protection film body 111; tear during the dyestripping and leave handle 112 and drive the tearing that does not have the viscose layer region at first and separate, then the protection film body 111 that does not have the viscose layer region tears the tearing that drives the protection film body 111 that has the viscose layer region and leaves to drive the tearing that drives protection film body 111 and viscose layer 14 and separate, reduce the difficulty of tearing of protection film body 111 from.

As shown in fig. 12, adhesive layer 14 has a first boundary 141 disposed proximate first edge 1121; the first boundary 141 extends in a first direction which is the direction from the tearing handle 112 to the protective film body 111; the first boundary 141 is flush with the first edge 1121, or a direction perpendicular to the direction from the tearing handle 112 to the protection film body 111 is taken as a second direction, and a distance is formed between the first boundary 141 and the first edge 1121 in the second direction. The first boundary 141 of the adhesive layer 14 is flush with the first edge 1121 or there is a gap between the first boundary 141 and the first edge 1121, which is helpful for driving the protective film body 111 glued with the adhesive layer 14 to separate by tearing the handle 112 when peeling the film.

With continued reference to fig. 12, the protective film structure 11 includes a second cut edge 1113 and a third cut edge 1114, one end of the second cut edge 1113 extends to the end of the tearing handle 112 away from the protective film body 111, and the other end of the second cut edge 1113 extends into the protective film body 111; the orthographic projection of the second cut edge 1113 on the flexible circuit board 13 and the orthographic projection of the adhesive layer 14 on the flexible circuit board 13 have an overlapping area; in the direction perpendicular to the direction from the tearing handle 112 to the protective film body 111, the width of the adhesive layer 14 on the side of the second cut edge 1113 close to the first cut edge 1111 is smaller than the width of the adhesive layer 14 on the side of the second cut edge 1113 far from the first cut edge 1111; the third cut edge 1114 is located in the protective film body 111 and connected with the other end of the second cut edge 1113; the third cutting edge 1114 curves away from the first cutting edge 1111.

The second cutting edge 1113 of this application embodiment equally cuts away from handle 112, protection film body 111 and divides into upper portion and lower part, and simultaneously, second cutting edge 1113 still divides into the viscose layer 14 also and is close to the region of first cutting edge 1111 and keeps away from the region of first cutting edge 1111, and the width of the viscose layer 14 of the region that is close to first cutting edge 1111 is less than the width of the viscose layer 14 of the region that keeps away from first cutting edge 1111, makes when tearing away protection film body 111 along second cutting edge 1113, the part that the viscose layer 14 width is little tears earlier, drives the tearing of the part that the viscose layer 14 width is big again, reduces the dyestripping degree of difficulty of the protection film body 111 in the region that viscose layer 14 is located; the third cutting limit 1114 is crooked to the direction of keeping away from first cutting limit 1111, and the crooked direction of third cutting limit 1114 is unanimous with the dyestripping direction promptly, tears when the junction to second cutting limit 1113 and third cutting limit 1114 when the dyestripping, and crooked third cutting limit 1114 can disperse the tearing stress of the junction of second cutting limit 1113 and third cutting limit 1114 for the lower part of protection film body 111 is changeed and is torn and remove.

With reference to fig. 12, a single-sided adhesive layer 15 and a driving chip 16 are further disposed on a side of the copper foil layer of the flexible circuit board away from the substrate, and the single-sided adhesive layer 15 is disposed at an edge of the protective film body 111 close to the first boundary 141 of the adhesive layer 14, which is helpful for achieving bonding between the bonding area of the display panel 1 and the driving chip 16 on the flexible circuit board, so that the flexible circuit board is more stably fixed on the non-display side of the display panel 1. The orthographic projection of the driving chip 16 on the protective film body 111 is located in the first area 111a, the orthographic projection of the adhesive layer 14 on the protective film body 111 is located in the second area 111b, and under the condition that the protective film structure 11 comprises the second cutting edge 1113 and the third cutting edge 1114, the tearing of the protective film body 111 is realized by firstly tearing off the part of the first area 111a of the protective film body 111 through the tearing handle 112 and then driving the tearing off of the second area 111 b.

The adhesive layer 14 may be an ACF (anisotropic conductive film) adhesive, or may be a pressure-sensitive adhesive, such as an OCA adhesive (optical adhesive) and an OCR adhesive (optical liquid adhesive).

With continued reference to fig. 12, the protective film structure 11 further includes a seventh cutting edge 1131, an eighth cutting edge 1132, a ninth cutting edge 1133, and a tearing portion 113 disposed on one side of the protective film body 111, wherein a tenth cutting edge 1134 and an eleventh cutting edge 1135 are disposed in an area between a connecting line of the seventh cutting edge 1131, the eighth cutting edge 1132 and the ninth cutting edge 1133 and the tearing portion 113; the tenth cutting edge 1134 and the eleventh cutting edge 1135 are oppositely disposed, and one end of the tenth cutting edge 1134 and one end of the eleventh cutting edge 1135 both extend in the first direction, and a space is left between one end of the tenth cutting edge 1134 and one end of the eleventh cutting edge 1135; the other end of the tenth cutting edge 1134 and the other end of the eleventh cutting edge 1135 each extend in the second direction.

In some examples, the seventh cutting edge 1131 extends in the width direction of the protective film body 111 to an end of the tear-off portion 113 away from the seventh cutting edge 1131, the tear-off portion 113 is integrally formed with the protective film body 111, the ninth cutting edge 1133 extends in a direction away from the seventh cutting edge 1131, and the arc-shaped ninth cutting edge 1133 is bent in a direction close to the tear-off portion 113. The provision of the tear-off portion 113, the seventh cut edge 1131, the eighth cut edge 1132, the ninth cut edge 1133, and the tenth cut edge 1134 makes it possible to tear off the region formed by the seventh cut edge 1131, the eighth cut edge 1132, and the ninth cut edge 1133 on the protective film body 111 by the tear-off portion 113. For example, after the first region 111a and the second region 111b of the protective film body 111 are torn off and removed by the tearing handle 112, the upper half portion of the tearing portion 113 is lifted, so that the protective film body 111 tears the region of the protective film body 111 away from the tearing portion 113 along the seventh cutting edge 1131, the eighth cutting edge 1132 and the ninth cutting edge 1133, and then the lower half portion of the tearing portion 113 is lifted, and the region of the protective film body 111 close to the tearing portion 113 is torn along the seventh cutting edge 1131, the eighth cutting edge 1132 and the ninth cutting edge 1133; meanwhile, the arc-shaped ninth cutting edge 1133 is bent towards the direction close to the tearing portion 113, after the protection film body 111 is torn away from the region of the tearing portion 113, the protection film body 111 can be driven to be torn away from the region of the tearing portion 113, and the arc-shaped ninth cutting edge 1133 also enables the protection film body 111 to be difficult to be torn when the protection film body 111 is torn away from the ninth cutting edge 1133, so that the operation of tearing away the region of the protection film body 111 close to the tearing portion 113 on the next step is facilitated. The protective film body 111 is removed step by step, so that the tearing difficulty of the protective film body 111 is reduced, the protective film body 111 can be thoroughly torn, and the film tearing success rate of the protective film body 111 is improved.

By the above technical solution, in the protective film structure and the display panel provided in this embodiment of the present application, the first cutting edge 1111 connected to the tearing handle 112 is formed on the protective film body 111, and an included angle between the first cutting edge 1111 and the first edge 1121 is an obtuse angle, compared with the protective film structure in which the included angle between the first cutting edge 1111 and the first edge 1121 is a right angle in the related art, the stress angle of the tearing stress point of the protective film structure 11 in this embodiment of the present application is increased, and the tearing stress at the connection point of the first cutting edge 1111 and the first edge 1121 is dispersed to the protective film body 111 around the tearing stress point, so that the tearing stress is reduced, the tearing difficulty of the protective film body 111 is reduced, and the problem that the protective film body 111 is easy to tear and difficult to tear is solved.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the application, and it is intended that the scope of the application be limited only by the claims appended hereto.

Claims

1. A protective film structure, comprising:

a protective film body;

the tearing handle is arranged on one side of the protective film body and is integrally formed with the protective film body;

the protective film body is provided with a first cutting edge, the tearing handle is provided with a first edge connected with the first cutting edge, and an included angle between the first cutting edge and the first edge is an obtuse angle.

2. The protective film structure of claim 1, wherein an included angle between the first cut edge and the first edge is 120 ° to 130 °.

3. The protective film structure of claim 1 or 2, wherein a first rounded chamfer is provided at the junction of the first cut edge and the first edge;

preferably, the arc radius of the first arc chamfer is 3-5 mm.

4. The protective film structure of claim 1 or 2, wherein the tear-off handle has a second edge opposite to the first edge, the protective film body has a first edge, the first edge and the first cut edge are respectively located at two adjacent sides of the tear-off handle, and an included angle between the first edge and the second edge is 90-130 °;

preferably, the included angle between the first edge and the second edge is 120-130 degrees;

preferably, a second arc chamfer is arranged at the joint of the first edge and the second edge.

5. The protective film structure of claim 4, further comprising:

a second cutting edge located on a side of the first edge adjacent to the second edge;

one end on the second cutting edge extends to tear and keep away from the handle the tip of protection film body, the other end on the second cutting edge extends to in the protection film body.

6. The protective film structure of claim 5, wherein in a direction in which the tear-away handle points toward the protective film body, the second cut edge located within the protective film body extends in the direction, and a length of the second cut edge located within the protective film body is less than or equal to one-half of a width of the protective film body.

7. The protective film structure of claim 5, further comprising:

the third cutting edge is positioned in the protective film body and is connected with the other end of the second cutting edge; the third cutting edge is curved away from the first cutting edge.

8. The protective film structure of claim 5, wherein the protective film body further comprises: a fourth cutting edge, a fifth cutting edge and a sixth cutting edge which are connected in sequence; the fourth cutting edge is connected with the first cutting edge, and a first area is defined by the first cutting edge, the fourth cutting edge, the fifth cutting edge and the first edge along an extension line in the direction pointing to the protective film body;

a second side and a third side connected in sequence; the second edge is connected with the first edge, the third edge is connected with a sixth cutting edge, and a second area is enclosed by the first edge, the second edge, the third edge and the first edge along the extension line in the direction pointing to the protective film body.

9. The protective film structure of claim 8, wherein a width of a second region of the second cut edge on a side thereof closer to the first cut edge is smaller than a width of a second region of the second cut edge on a side thereof farther from the first cut edge in a direction perpendicular to a direction in which the tear-away handle is directed toward the protective film body.

10. A display panel, comprising:

the circuit layer and the flexible circuit board are arranged in a stacked mode;

an adhesive layer and the protective film structure according to any one of claims 1 to 9; the adhesive layer is arranged between the circuit layer and the flexible circuit board; the protective film structure is arranged on one side, far away from the flexible circuit board, of the adhesive layer.