Protective film, display module and method for removing protective film

Abstract

The present application relates to a kind of protective film, display module and protective film tearing method, protective film includes: protective film body, cutting line is opened on protective film body, protective film body includes the main part and extension strip being divided by cutting line, main part is located at the periphery of extension strip, one part of extension strip is connected with main part, another part of extension strip is disconnected with main part with cutting line as limit;And tear film handle, tear film handle is protrudingly arranged on the outer circumferential side of protective film body, and tear film handle is connected with the side of main part away from extension strip;Protective film has preset tear film direction extending from tear film handle to protective film body, extension strip being cut by cutting line includes arc segment and / or long strip segment, at least part of the outer contour of arc segment is configured to be tangent to tear film direction, and at least part of arc segment opening is towards the side where tear film handle is located, at least part of the outer contour of long strip segment is configured to be parallel to tear film direction, and the main part of protective film can be smoothly torn off.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to protective films, display modules, and methods for removing protective films. Background Technology

[0002] Flexible display panels are made of various organic and inorganic thin films deposited and stacked. Each layer of film is relatively thin and has low strength, making it prone to peeling or cracking under external force. Generally, a protective film is pasted on the flexible display panel to prevent scratches and dust contamination during transportation or processing. Moreover, in the subsequent assembly process, the temporarily pasted protective film needs to be peeled off to assemble the flexible display panel with other film layers.

[0003] The process of removing the protective film from the flexible display panel is a dangerous point of external force interference. Too fast a peeling speed or an inappropriate angle can cause cracks and peeling of the inorganic film inside the flexible display panel. Traditional protective films are prone to damaging the flexible display panel during the peeling process. Summary of the Invention

[0004] Therefore, it is necessary to provide a protective film, a display module, and a method for removing the protective film to address the problem that traditional protective films can easily damage flexible display panels during the removal process.

[0005] A protective film comprising:

[0006] A protective film body, wherein a cutting line is formed on the protective film body, the protective film body includes a main body portion formed by the cutting line and an extension strip, the main body portion being disposed around the periphery of the extension strip, a portion of the extension strip being connected to the main body portion, and another portion of the extension strip being disconnected from the main body portion by the cutting line; and

[0007] A film-tearing handle is provided protrudingly on the outer periphery of the protective film body, and the film-tearing handle is connected to the side of the main body away from the extension strip;

[0008] The protective film has a preset tearing direction extending from the tearing handle to the protective film body. The extension strip formed by the cutting line includes an arc segment and / or a long strip segment. At least a portion of the outer contour of the arc segment is configured to be tangent to the tearing direction, and at least a portion of the arc segment opens toward the side where the tearing handle is located. At least a portion of the outer contour of the long strip segment is configured to be parallel to the tearing direction.

[0009] In some embodiments, the protective film body includes a plurality of extension strips formed by the cutting lines, each extension strip being at least partially connected to the main body, and adjacent extension strips of the plurality of extension strips being disconnected from each other;

[0010] Preferably, the protective film body is quadrilateral, and the protective film body has a first vertex and a third vertex located on one diagonal, and a second vertex and a fourth vertex located on the other diagonal, and the film tearing handle is located at at least one of the first vertex, the second vertex, the third vertex and the fourth vertex;

[0011] Preferably, the film-tearing handle is provided at at least one of the first apex and the third apex, and the film-tearing direction is the direction from one of the first apex and the third apex to the other; or, the film-tearing handle is provided at at least one of the second apex and the fourth apex, and the film-tearing direction is the direction from one of the second apex and the fourth apex to the other.

[0012] In some embodiments, the cutting line includes a plurality of interconnected first arcs, the plurality of first arcs being arranged along the longitudinal direction of the protective film, each first arc being at least partially tangent to the tearing direction, and the opening direction of each first arc facing the location of the tearing handle.

[0013] In some embodiments, the cutting line includes a second arc connecting two adjacent first arcs, the center of the second arc and the center of the first arc being located on opposite sides of the extending direction of the cutting line, and the radius of the second arc being smaller than the radius of the first arc.

[0014] Preferably, the cutting line includes a first straight line extending in a direction parallel to the tearing direction, the first straight line connecting to the first first arc among a plurality of first arcs that is closest to the tearing handle, and the connection point between the first first arc and the first straight line being tangent to the first straight line.

[0015] Preferably, the cutting line includes a second straight line extending along the tearing direction, the second straight line connecting to the tail first arc line among a plurality of first arc lines that is furthest from the tearing handle, and the connection between the tail first arc line and the second straight line is tangent to the second straight line.

[0016] In some embodiments, the ratio of the radius of the first arc to the radius of the second arc is between 7 and 8.4;

[0017] Preferably, the ratio of the radius of the first arc to the radius of the second arc is 7.8.

[0018] In some embodiments, the cutting lines include multiple cutting lines, which are arranged at transverse intervals intersecting the longitudinal direction. The extension strip is formed by cutting between two adjacent cutting lines. The extension strip is constructed to include the arc segment, and the outer contour of the arc segment along both sides of the transverse direction is the first arc.

[0019] Preferably, the main body is annular, and the plurality of extension strips are surrounded within the annulus.

[0020] In some embodiments, the extension strip includes a plurality of the elongated segments arranged along a second direction intersecting the tearing direction, and adjacent elongated segments are at least partially disconnected.

[0021] Preferably, the protective film body is divided into two disconnected sub-protective films by the cutting line. Each sub-protective film includes the main body and the extension strip at least partially connected to the main body. The two main bodies are located at opposite ends in the tearing direction. The extension strips of the two sub-protective films are arranged in an alternating manner, and each extension strip of the two sub-protective films is configured to include a long strip segment extending along the tearing direction.

[0022] Preferably, the film-tearing handle includes two parts, which are located at opposite ends in the film-tearing direction, and are respectively connected to the two main body parts;

[0023] Preferably, each of the sub-protective films includes a plurality of the extension strips, the plurality of extension strips in each of the sub-protective films are arranged at intervals along the second direction, a spacer groove is defined between two adjacent extension strips in each of the sub-protective films, and the extension strip of one of the two sub-protective films is embedded in the spacer groove of the other;

[0024] Preferably, the protective film body is constructed as a quadrilateral, the protective film body has two intersecting diagonals, the tearing direction is parallel to the direction of the diagonal corresponding to the tearing handle, the second direction is parallel to the direction of the other diagonal, and the extension strips of each of the two sub-protective films are staggered along the second direction.

[0025] In some embodiments, the cutting line includes multiple inclined lines, a first connecting line, and a second connecting line. Each inclined line extends in a direction parallel to the tearing direction. The multiple inclined lines are spaced apart from each other in the second direction. The ends of each pair of adjacent inclined lines are connected by the first connecting line or the second connecting line. The first connecting line, which is connected to one end of the inclined line in the direction of extension, connects the current inclined line and the adjacent upstream inclined line. The second connecting line, which is connected to the other end of the inclined line in the direction of extension, connects the current inclined line and the adjacent downstream inclined line.

[0026] Preferably, the protective film body has a first edge and a second edge located at opposite ends in its longitudinal direction, and a plurality of inclined lines are arranged at intervals between the first edge and the second edge, and the inclined lines of the cutting lines that are close to the first edge extend to intersect the first edge, and the inclined lines of the cutting lines that are close to the second edge extend to intersect the second edge.

[0027] Preferably, both the first connecting line and the second connecting line are arc-shaped, both are tangent to the inclined line, and the opening of one of the first connecting line and the second connecting line faces the side where one of the two film-tearing handles is located, while the opening of the other of the first connecting line and the second connecting line faces the side where the other of the film-tearing handles is located.

[0028] Preferably, the arc centers of the first connecting line and the second connecting line are located on opposite sides of the extension direction of the cutting line, and the radii of the first connecting line and the second connecting line are the same.

[0029] A display module includes a display panel and the aforementioned protective film, wherein the protective film is adhered to the display panel.

[0030] A method for removing a protective film, characterized by comprising the following steps:

[0031] Provide the above display module;

[0032] A force is applied to the film-tearing handle along the film-tearing direction, gradually causing the main body and the extension strip to detach from the display panel;

[0033] The protective film body is quadrilateral, and the protective film body has a first vertex and a third vertex located on one diagonal, and a second vertex and a fourth vertex located on the other diagonal;

[0034] The tearing handle is provided at at least one of the first apex and the third apex, and the tearing direction is configured such that one of the first apex and the third apex points to the other; or, the tearing handle is provided at at least one of the second apex and the fourth apex, and the tearing direction is configured such that one of the second apex and the fourth apex points to the other.

[0035] In the aforementioned protective film, the extension strip formed by the cutting line includes an arc-shaped segment and / or a long strip segment. At least a portion of the outer contour of the arc-shaped segment is configured to be tangent to the tearing direction, and at least a portion of the arc-shaped segment opens towards the side where the tearing handle is located. At least a portion of the outer contour of the long strip segment is configured to be parallel to the tearing direction. Thus, the extension strip includes an arc-shaped segment and / or a long strip segment. The arc-shaped segment is tangent to the tearing direction, and the long strip segment is parallel to the tearing direction. Therefore, when a force is applied to the tearing handle along the tearing direction, the main body and the extension strip are pulled away from the display screen body. Moreover, regardless of whether the extension strip is configured as an arc-shaped segment or a long strip segment, the extension direction of the extension strip is consistent with the tearing direction, allowing the extension strip to be torn off smoothly. This ensures that the entire protective film body can be torn off smoothly, preventing stress concentration in local areas of the protective film during the tearing process and thus preventing damage to the display panel. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the protective film structure in some embodiments of this application;

[0037] Figure 2 This is a schematic diagram of the protective film structure in some other embodiments of this application;

[0038] Figure 3 for Figure 2 An exploded view of the protective film in the illustrated embodiment;

[0039] Figure 4 This is a flowchart of a protective film removal method in some embodiments of this application.

[0040] Explanation of reference numerals in the attached drawings: 100, protective film; 101, sub-protective film; 10, protective film body; 12, main body; 14, extension strip; 141, arc-shaped segment; 143, long strip segment; 15, spacer groove; 16, first edge; 17, second edge; 30, tearing handle; 200, cutting line; 212, first arc; 214, second arc; 216, first straight line; 218, second straight line; 231, inclined line; 233, first connecting line; 235, second connecting line; A, tearing direction; B, longitudinal direction; C, transverse direction; D, second direction. Detailed Implementation

[0041] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0047] As described in the background section, protective films are typically applied to flexible display panels to protect them from scratches or contamination. Traditional protective films often have patterned shapes cut into them to reduce stress during removal. However, the patterns on traditional protective films tend to create areas of stress concentration, which can damage the flexible display panel during removal. The inventors discovered that the fundamental reason traditional protective films are prone to damage due to localized stress concentration is that the patterns on them have large areas where the direction of extension is opposite to the tearing direction. During removal, these areas cannot detach smoothly from the flexible display panel, leading to stress concentration and damage, especially at high tearing speeds.

[0048] To address the aforementioned technical problems, this application provides a protective film 100 to improve the smoothness of the film removal process and protect the flexible display panel.

[0049] See Figure 1 , Figure 1 This is a schematic diagram of the protective film 100 in some embodiments of this application. According to some embodiments of this application, the protective film 100 includes a protective film body 10 and a tear handle 30. A cutting line 200 is formed on the protective film body 10. The protective film body 10 includes a main body portion 12 divided by the cutting line 200 and an extension strip 14. The main body portion 12 is located around the extension strip 14. A portion of the extension strip 14 is connected to the main body portion 12, and the other portion of the extension strip 14 is disconnected from the main body portion 12 by the cutting line 200. Thus, by setting the cutting line 200 to divide the protective film body 10 into the main body portion 12 and the extension strip 14, the overall integrity of the protective film body 10 is reduced, thereby reducing stress during the tearing process and improving the smoothness of tearing.

[0050] A tear-off handle 30 protrudes from the outer periphery of the protective film body 10 and is connected to the side of the main body 12 away from the extension strip 14. The protective film 100 has a predetermined tearing direction A extending from the tear-off handle 30 to the protective film body 10. The tear-off handle 30 protrudes from the protective film body 10 and, during the tearing process, acts as a force-applying component, transmitting the tearing force to the protective film 100 body.

[0051] The extension strip 14 formed by the cutting line 200 includes an arc segment 141 and / or a long strip segment 143. At least a portion of the outer contour of the arc segment 141 is configured to be tangent to the tearing direction A, and at least a portion of the arc segment 141 opens toward the side where the tearing handle 30 is located. At least a portion of the outer contour of the long strip segment 143 is configured to be parallel to the tearing direction A. Thus, the extension strip 14 includes an arc-shaped segment 141 and / or a long strip segment 143. The arc-shaped segment 141 is tangent to the tearing direction A, and the long strip segment 143 is parallel to the tearing direction A. Therefore, after applying force to the tearing handle 30 along the tearing direction A, the main body 12 and the extension strip 14 are pulled away from the display screen body. Moreover, regardless of whether the extension strip 14 is constructed as an arc-shaped segment 141 or a long strip segment 143, the extension direction of the extension strip 14 is consistent with the tearing direction A. The extension strip 14 can be torn off smoothly, so that the entire protective film 100 body can be torn off smoothly, preventing stress concentration in local areas of the protective film 100 during the tearing process and causing damage to the display panel.

[0052] Understandably, the tearing direction A is the preset direction in which force is applied when tearing the protective film 100. Generally, the tearing direction A is the direction in which the tearing handle 30 points towards the geometric center of the protective film body 10. For example, the tearing direction A is the diagonal direction of the protective film body 10, or the tearing direction A is the horizontal or vertical direction of the protective film body 10. Specifically, in one embodiment, it is preset to the diagonal direction of the protective film 100. This way, tearing the protective film 100 along the diagonal direction is less strenuous, and the stress exerted by the protective film 100 on the display panel is smaller.

[0053] In one specific embodiment, the protective film body 10 is quadrilateral and has a first vertices and a third vertices located on one diagonal, and a second vertices and a fourth vertices located on the other diagonal. The tear handle 30 is located at at least one of the first vertices, the second vertices, the third vertices and the fourth vertices. By placing the tear handle 30 at the vertices of the protective film body 10, a tearing force can be applied from the vertices along the diagonal direction, and the protective film 100 can be torn off with less effort.

[0054] Preferably, a tear-off handle 30 is provided at at least one of the first apex and the third apex, and the tear-off direction A is the direction from one of the first apex to the other, for example, the tear-off direction A is the direction from the first apex to the third apex, or the direction from the third apex to the first apex. Alternatively, a tear-off handle 30 is provided at at least one of the second apex and the fourth apex, and the tear-off direction A is configured such that one of the second apex and the fourth apex points to the other, for example, the tear-off direction A is the direction from the second apex to the fourth apex, or the tear-off direction A is the direction from the fourth apex to the second apex.

[0055] Understandably, in some embodiments, the protective film 100 can be divided into two parts by the cutting line 200. The tearing direction A can simultaneously include the direction from the first apex to the third apex and the direction from the third apex to the first apex, or the tearing direction A can simultaneously include the direction from the second apex to the fourth apex and the direction from the fourth apex to the second apex.

[0056] In some embodiments, the protective film body 10 includes a plurality of extension strips 14 formed by cutting lines 200. Each extension strip 14 is at least partially connected to the main body 12, and adjacent extension strips 14 are disconnected from each other. That is, by cutting the protective film body 10 into the main body 12 and a plurality of extension strips 14 all connected to the main body 12 by the cutting lines 200, the integrity of the protective film body 10 is dispersed, thus reducing stress during film removal. Furthermore, by cutting to form a plurality of extension strips 14, with adjacent extension strips 14 at least partially disconnected, during film removal, only the extension strips 14 need to be detached from the display panel. Moreover, the extension direction of each extension strip 14 is parallel or tangential to the film removal direction A, allowing the extension strips 14 to detach smoothly from the display panel during the film removal process. In other words, by providing a larger number of extension strips 14, the integrity of the protective film body 10 is reduced, thereby reducing film removal stress. Simultaneously, by aligning the extension directions of the extension strips 14 with the film removal direction A, the smoothness of film removal is further improved, thereby preventing damage to the display panel.

[0057] According to some embodiments of this application, the cutting line 200 includes a plurality of interconnected first arc lines 212. The plurality of first arc lines 212 are arranged along the longitudinal direction B of the protective film 100. Each first arc line 212 is at least partially tangent to the film-tearing direction A, and the opening direction of each first arc line 212 faces the location of the film-tearing handle 30. In this way, the outer contour of the extension strip 14 formed by cutting the protective film body 10 through the first arc lines 212 is arc-shaped and tangent to the film-tearing direction A. Thus, during the film-tearing process, the film-tearing direction A is tangent to the outer contour of the extension strip 14, which can smoothly peel off the extension strip 14, improve the smoothness of film-tearing, and prevent damage to the display panel during the film-tearing process.

[0058] Furthermore, the cutting line 200 includes a second arc 214. The center of the second arc 214 and the center of the first arc 212 are located on opposite sides of the extension direction of the cutting line 200, i.e., the opening direction of the second arc 214 is opposite to that of the first arc 212, and the radius R1 of the second arc 214 is smaller than the radius R2 of the first arc 212. After arranging multiple second arcs 214 along the longitudinal direction B of the protective film body 10, if the multiple second arcs 214 are directly connected, the extension direction of the cutting line 200 at the connection point will change at a large angle, which will easily accumulate stress during the film peeling process. Therefore, the second arc 214 is used to transition and connect two adjacent first arcs 212. The connection point of the two first arcs 212 is smoothly transitioned, and the extension direction will not suddenly change at a large angle, which can ensure the smooth connection between the multiple second arcs 214, thereby preventing local stress concentration during the film peeling process and further improving the smoothness of film peeling.

[0059] Meanwhile, through the cooperation of the first arc 212 and the second arc 214, the cutting line 200 extends continuously without sharp corners, making it more convenient to cut the cutting line 200 on the protective film body 10.

[0060] Preferably, the cutting line 200 includes a first straight line 216 extending in a direction parallel to the film-tearing direction A. The first straight line 216 connects to the first first arc 212 among a plurality of first arcs 212 that is closest to the film-tearing handle 30, and the connection point between the first first arc 212 and the first straight line 216 is tangent to the first straight line 216. Essentially, by setting a first straight line 216 parallel to the film-tearing direction A at the starting position of the cutting line 200, when a film-tearing force is applied to the film-tearing handle 30, the force is transmitted along the film-tearing direction A to the first straight line 216 of the cutting line 200. Since the first straight line 216 is parallel to the film-tearing direction, it can smoothly drive the extension strip 14 formed by the cutting line 200 to detach from the display panel. This effectively increases the transition zone for the film-tearing force to be transmitted to the extension strip 14 through the first straight line 216, guiding the film-tearing force to be transmitted more smoothly to the extension strip 14.

[0061] Optionally, the ratio of the radius R1 of the first arc 212 to the radius R2 of the second arc 214 is between 7 and 8.4. In this way, the ratio of the radius R1 of the first arc 212 to the radius R2 of the second arc 214 is large, and the first arc 212 occupies a larger area in the cutting line 200, which is more conducive to guiding the extension to detach from the display panel.

[0062] In some specific embodiments, the ratio of the radius R1 of the first arc 212 to the radius R2 of the second arc 214 is 7.8. As shown in Table 1 below, the structure obtained through simulation of the film-tearing process reveals that appropriately increasing the value of R1 / R2—that is, increasing R1 along the first arc 212 tangent to the film-tearing direction A and decreasing R2 at a certain angle opposite to the film-tearing direction A—can reduce the stress on the display panel during the film-tearing process. When R1 / R2 = 7.8, the film-tearing stress is reduced by 8%, and the film-tearing smoothness of the protective film 100 is better. However, it is understandable that the ratio of R1 / R2 cannot be increased or decreased indefinitely, otherwise the protective film 100 cannot be completely peeled off.

[0063]

[0064] Table 1

[0065] Preferably, the cutting line 200 includes a second straight line 218 extending along the tearing direction A. The second straight line 218 connects to the tail first arc 212, which is furthest from the tearing handle 30 among a plurality of first arcs 212, and the connection point between the tail first arc 212 and the second straight line 218 is tangent to the second straight line 218. Essentially, by setting a second straight line 218 parallel to the tearing direction A at the cut-off position of the cutting line 200, during the tearing process, when the extension strip 14 is torn to its final end along the tearing direction A, the extension strip 14 extends parallel to the tearing direction A under the guidance of the second straight line 218, enabling the extension strip 14 to smoothly complete its final detachment.

[0066] Furthermore, when the tail of the extension strip 14 is connected to the main body 12, the tearing force can be smoothly transmitted from the extension strip 14 to the main body 12 along the tearing direction A by the guidance of the second straight line 218. The force on the main body 12 is still along the tearing direction A. The force directions on both sides of the connection between the main body 12 and the extension strip 14 are consistent, and the tearing force at the connection between the main body 12 and the extension strip 14 can be smoothly transmitted, preventing excessive local stress at the connection between the main body 12 and the extension strip 14 during the tearing process, and further improving the smoothness of tearing at the connection between the extension strip 14 and the main body 12.

[0067] According to some embodiments of this application, the cutting lines 200 include multiple lines, which are arranged at intervals along a transverse direction C intersecting the longitudinal direction B. An extension strip 14 is formed between adjacent cutting lines 200. The extension strip 14 is constructed to include an arc segment 141, the outer contour of which along both sides of the transverse direction C is a first arc 212. This makes the outer contour of the arc segment 141 tangent to the cutting direction, thereby smoothly transferring the tearing force to the arc segment to separate the extension strip 14 from the display panel. Furthermore, forming multiple extension strips 14 by cutting with multiple cutting lines 200 reduces the tearing stress.

[0068] Specifically, the main body 12 is annular, and multiple extension strips 14 are surrounded within the annulus. Thus, multiple extension strips 14 are surrounded within the annulus. Each extension strip 14 can be connected to the main body 12 at both ends along the extension direction of the main body of the protective film 100. Each extension strip 14 is separated from the main body 12 along both sides of the transverse direction C of the main body of the protective film 100, so as to break the integrity of the main body of the protective film 100 and make it easier to tear off the protective film 100.

[0069] See Figure 2 , Figure 2 This is a schematic diagram of the protective film 100 in some embodiments of this application. According to some embodiments of this application, the extension strip 14 includes a plurality of elongated segments 143, which are arranged along a second direction D intersecting the tearing direction A, and adjacent segments 143 are at least partially disconnected. Thus, by providing a plurality of elongated segments 143 extending along the tearing direction A, the tearing force can be smoothly transmitted, allowing the protective film 100 to be easily torn off, preventing damage to the display panel.

[0070] See Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the protective film 100 in some embodiments of this application. Figure 3 for Figure 2 The diagram shows an exploded view of the protective film 100. In some embodiments, the protective film body 10 is divided by a cutting line 200 into two disconnected sub-protective films 101. Each sub-protective film 101 includes a main body 12 and an extension strip 14 at least partially connected to the main body 12. The two main bodies 12 are located at opposite ends in the tearing direction A. The extension strips 14 in each of the two sub-protective films 101 are arranged alternately, and each extension strip 14 in the two sub-protective films 101 is configured to include a long strip segment 143 extending along the tearing direction A. Thus, by cutting the protective film body 10 into two sub-protective films 101, the sub-protective films 101 can be torn off individually, making tearing more convenient. Furthermore, each sub-protective film 101 includes a long strip segment 143 extending along the tearing direction, and the extension segment can also be easily torn off.

[0071] Furthermore, the film-tearing handle 30 includes two handles, which are located at opposite ends of the film-tearing direction A. Each handle is connected to one of the two main body portions 12. This arrangement provides a film-tearing handle 30 for each of the two sub-protective films 101, facilitating the removal of each sub-protective film 101. Moreover, the film-tearing direction A of the two handles 30 is on the same straight line, except that the film-tearing direction A of the two sub-protective films 101 faces opposite directions.

[0072] Specifically, each sub-protective film 101 includes a plurality of extension strips 14, which are spaced apart from each other along the second direction D. A gap groove 15 is defined between two adjacent extension strips 14 in each sub-protective film 101, and the extension strip 14 of one sub-protective film 101 is embedded in the gap groove 15 of the other. In this way, each sub-protective film 101 includes a gap groove 15 and extension strips 14, and the extension strips 14 of the two are arranged alternately along the second direction D by accommodating the extension strips 14 of the other through the gap groove 15 of one.

[0073] In one specific embodiment, the protective film body 10 is constructed as a quadrilateral with two intersecting diagonals. The tearing direction A coincides with the direction of the diagonal corresponding to the tear handle 30, and the second direction D coincides with the direction of the other diagonal. The extension strips 14 in each of the two sub-protective films 101 are staggered along the second direction D. Essentially, by arranging multiple extension strips 14 along one diagonal and applying tearing force along the other diagonal, the protective film 100 can be torn off more easily.

[0074] According to some embodiments of this application, the cutting line 200 includes multiple inclined lines 231, a first connecting line 233, and a second connecting line 235. Each inclined line 231 extends in a direction parallel to the tearing direction A. The multiple inclined lines 231 are arranged at intervals along a second direction D. The ends of each pair of adjacent inclined lines 231 are connected by the first connecting line 233 or the second connecting line 235. At one end of the inclined line 231 extending in the direction of extension, the first connecting line 233 connects the current inclined line 231 and the adjacent upstream inclined line 231. At the other end of the inclined line 231 extending in the direction of extension, the second connecting line 235 connects the current inclined line 231 and the adjacent downstream inclined line 231. In this way, multiple inclined lines 231 are connected by the first connecting line 233 and the second connecting line 235, so that the multiple inclined lines 231, the first connecting line 233 and the second connecting line 235 are interlaced to form a continuous curved and extending cutting line 200. At the same time, the cooperation of multiple inclined lines 231, the first connecting line 233 and the second connecting line 235 can cut and form multiple extension strips 14, and the extension direction of the extension strips 14 is consistent with the direction of the inclined line 231 and can be parallel to the tearing direction A, which is convenient for tearing.

[0075] Understandably, the long strip 143 of the extension strip 14 is defined between two adjacent inclined lines 231, and the edges on both sides of the long strip 143 are two inclined lines 231, so that the long strip 143 is parallel to the tearing direction A.

[0076] Preferably, the protective film body 10 has a first edge 16 and a second edge 17 located at opposite ends in its longitudinal direction B. Multiple inclined lines 231 of the cutting line 200 are arranged at intervals between the first edge 16 and the second edge 17. The inclined line 231 of the cutting line 200 near the first edge 16 extends to intersect with the first edge 16, and the inclined line 231 of the cutting line 200 near the second edge 17 extends to intersect with the second edge 17. In this way, both ends of the cutting line 200 intersect with the edge of the protective film body 10, and the cutting line 200 can divide the protective film body 10 into two sub-protective films 101 on both sides of the cutting line 200.

[0077] Preferably, both the first connecting line 233 and the second connecting line 235 are arc-shaped, and both the first connecting line 233 and the second connecting line 235 are tangent to the inclined line 231. The opening of one of the first connecting line 233 and the second connecting line 235 faces the side where one of the two film-tearing handles 30 is located, and the opening of the other of the first connecting line 233 and the second connecting line 235 faces the side where the other of the two film-tearing handles 30 is located. In this way, the first connecting line 233 and the second connecting line 235 smoothly transition and connect the adjacent inclined line 231 through the arc shape. The cutting line 200 extends continuously and has no sharp corners, which makes it more convenient to perform the cutting process of the cutting line 200 on the protective film body 10.

[0078] Optionally, the arc centers of the first connecting line 233 and the second connecting line 235 are located on opposite sides of the extension direction of the cutting line 200, that is, the openings of the first connecting line 233 and the second connecting line 235 face opposite directions, and the radii of the first connecting line 233 and the second connecting line 235 are the same. In the two sub-protective films 101, one sub-protective film 101 has an extension strip 14 defined by an inclined line 231 and the first connecting line 233, and the other sub-protective film 101 has an extension strip 14 defined by an inclined line 231 and the second connecting line 235. By setting the openings of the first connecting line 233 and the second connecting line 235 to face opposite directions and have the same radius, the extension segments formed on the two sub-protective films 101 can have the same shape, making the two sub-protective films 101 more symmetrical and uniform, and resulting in a more uniform tear stress distribution across the entire protective film 100.

[0079] As shown in Table 2 below, a simulation analysis of the film-removing process of the protective film 100 in this embodiment was performed. The results show that as the radius R3 of the first connecting line 233 and the second connecting line 235 decreases, the adhesive force can be effectively dispersed, reducing the stress on the display panel. Preferably, when the design parameter R3 = 1.5, the stress reduction caused by film removal on the display panel is about 25%.

[0080]

[0081] Table 2

[0082] In some specific embodiments of this application, the protective film 100 includes a protective film body 10 and a tear handle 30. The protective film body 10 has a cutting line 200. The protective film body 10 includes a main body portion 12 formed by the cutting line 200 and an extension strip 14. The main body portion 12 is located around the extension strip 14. A part of the extension strip 14 is connected to the main body portion 12, and the other part of the extension strip 14 is disconnected from the main body portion 12 by the cutting line 200.

[0083] Furthermore, the extension strip 14 formed by the cutting line 200 includes an arc-shaped segment 141. At least a portion of the outer contour of the arc-shaped segment 141 is configured to be tangent to the tearing direction A, and at least a portion of the arc-shaped segment 141 has an opening facing the side where the tearing handle 30 is located. After applying force to the tearing handle 30 along the tearing direction A, the main body 12 and the extension strip 14 are pulled away from the display screen body. The extension direction of the extension strip 14 is consistent with the tearing direction A, and the extension strip 14 can be smoothly torn off. In this way, the entire protective film 100 body can be smoothly torn off, preventing stress concentration in local areas of the protective film 100 during the tearing process and causing damage to the display panel.

[0084] Alternatively, the extension strip 14 formed by the cutting line 200 includes a long strip segment 143, at least a portion of the outer contour of the long strip segment 143 being configured to be parallel to the tearing direction A. Thus, when force is applied to the tearing handle 30 along the tearing direction A, the main body 12 and the extension strip 14 are pulled away from the display screen body. Since the extension direction of the extension strip 14 is consistent with the tearing direction A, the extension strip 14 can be smoothly torn off. This allows the entire protective film 100 body to be smoothly torn off, preventing stress concentration in localized areas of the protective film 100 during the tearing process and thus preventing damage to the display panel.

[0085] According to some embodiments of this application, this application also provides a display module, including a display panel and a protective film 100 as described in any of the above embodiments. The protective film 100 is pasted on the display panel to protect the display panel and prevent the back of the display panel from being scratched or contaminated by dust.

[0086] Specifically, the protective film 100 includes a protective film body 10 and a tear-off handle 30. The protective film body 10 has a cutting line 200. The protective film body 10 includes a main body portion 12 divided by the cutting line 200 and an extension strip 14. The main body portion 12 is located around the extension strip 14. A portion of the extension strip 14 is connected to the main body portion 12, and the other portion of the extension strip 14 is disconnected from the main body portion 12 by the cutting line 200. Thus, by dividing the protective film body 10 into the main body portion 12 and the extension strip 14 by the cutting line 200, the overall integrity of the protective film body 10 is reduced, thereby reducing stress during the tear-off process and improving the smoothness of tearing.

[0087] A tear-off handle 30 protrudes from the outer periphery of the protective film body 10 and is connected to the side of the main body 12 away from the extension strip 14. The protective film 100 has a predetermined tearing direction A extending from the tear-off handle 30 to the protective film body 10. The tear-off handle 30 protrudes from the protective film body 10 and, during the tearing process, acts as a force-applying component, transmitting the tearing force to the protective film 100 body.

[0088] The extension strip 14 formed by the cutting line 200 includes an arc segment 141 and / or a long strip segment 143. At least a portion of the outer contour of the arc segment 141 is configured to be tangent to the tearing direction A, and at least a portion of the arc segment 141 opens toward the side where the tearing handle 30 is located. At least a portion of the outer contour of the long strip segment 143 is configured to be parallel to the tearing direction A. Thus, the extension strip 14 includes an arc-shaped segment 141 and / or a long strip segment 143. The arc-shaped segment 141 is tangent to the tearing direction A, and the long strip segment 143 is parallel to the tearing direction A. Therefore, after applying force to the tearing handle 30 along the tearing direction A, the main body 12 and the extension strip 14 are pulled away from the display screen body. Moreover, regardless of whether the extension strip 14 is constructed as an arc-shaped segment 141 or a long strip segment 143, the extension direction of the extension strip 14 is consistent with the tearing direction A. The extension strip 14 can be torn off smoothly, so that the entire protective film 100 body can be torn off smoothly, preventing stress concentration in local areas of the protective film 100 during the tearing process and causing damage to the display panel.

[0089] According to some embodiments of this application, the display panel has a camera area, and the protective film body 10 has a camera hole, which is corresponding to the camera area on the display panel.

[0090] According to some embodiments of this application, this application also provides a method for removing a protective film 100, comprising the following steps:

[0091] Step S100: Provide a display module as described in any of the above embodiments, and attach a display panel as described in any of the above embodiments to the display panel;

[0092] In step S300, force is applied to the film-tearing handle 30 along the film-tearing direction A, gradually driving the main body 12 and the extension strip 14 to detach from the display panel, so as to gradually remove the protective film 100 along the film-tearing direction A, and the extension strip 14 is subjected to force smoothly during the tearing process, which can prevent the display panel from being damaged.

[0093] Specifically, the protective film 100 includes a protective film body 10 and a tear-off handle 30. The protective film body 10 has a cutting line 200. The protective film body 10 includes a main body portion 12 divided by the cutting line 200 and an extension strip 14. The main body portion 12 is located around the extension strip 14. A portion of the extension strip 14 is connected to the main body portion 12, and the other portion of the extension strip 14 is disconnected from the main body portion 12 by the cutting line 200. Thus, by dividing the protective film body 10 into the main body portion 12 and the extension strip 14 by the cutting line 200, the overall integrity of the protective film body 10 is reduced, thereby reducing stress during the tear-off process and improving the smoothness of tearing.

[0094] The extension strip 14 formed by the cutting line 200 includes an arc segment 141 and / or a long strip segment 143. At least a portion of the outer contour of the arc segment 141 is configured to be tangent to the tearing direction A, and at least a portion of the arc segment 141 opens toward the side where the tearing handle 30 is located. At least a portion of the outer contour of the long strip segment 143 is configured to be parallel to the tearing direction A. Thus, the extension strip 14 includes an arc-shaped segment 141 and / or a long strip segment 143. The arc-shaped segment 141 is tangent to the tearing direction A, and the long strip segment 143 is parallel to the tearing direction A. Therefore, after applying force to the tearing handle 30 along the tearing direction A, the main body 12 and the extension strip 14 are pulled away from the display screen body. Moreover, regardless of whether the extension strip 14 is constructed as an arc-shaped segment 141 or a long strip segment 143, the extension direction of the extension strip 14 is consistent with the tearing direction A. The extension strip 14 can be torn off smoothly, so that the entire protective film 100 body can be torn off smoothly, preventing stress concentration in local areas of the protective film 100 during the tearing process and causing damage to the display panel.

[0095] The protective film body 10 is quadrilateral, and has a first vertex and a third vertex located on one diagonal, and a second vertex and a fourth vertex located on the other diagonal. A tear-off handle 30 is provided at at least one of the first and third vertexes. The tearing direction A is the direction from one of the first and third vertexes to the other, for example, the tearing direction A is the direction from the first vertex to the third vertex, or the third vertex to the first vertex. Alternatively, the tear-off handle 30 is provided at at least one of the second and fourth vertexes, and the tearing direction A is configured such that one of the second and fourth vertexes points to the other, for example, the tearing direction A is the direction from the second vertex to the fourth vertex, or the tearing direction A is the direction from the fourth vertex to the second vertex.

[0096] Understandably, in some embodiments, the protective film 100 can be divided into two parts by the cutting line 200. The tearing direction A can simultaneously include the direction from the first apex to the third apex and the direction from the third apex to the first apex, or the tearing direction A can simultaneously include the direction from the second apex to the fourth apex and the direction from the fourth apex to the second apex.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A protective film, characterized in that, include: A protective film body has a cutting line on it. The protective film body includes a main body portion formed by the cutting line and an extension strip. The main body portion is located around the extension strip. A part of the extension strip is connected to the main body portion, and another part of the extension strip is disconnected from the main body portion with the cutting line as the boundary. and A film-tearing handle is provided protrudingly on the outer periphery of the protective film body, and the film-tearing handle is connected to the side of the main body away from the extension strip; The protective film has a preset tearing direction extending from the tearing handle to the protective film body. The extension strip formed by the cutting line includes an arc segment and / or a long strip segment. At least a portion of the outer contour of the arc segment is configured to be tangent to the tearing direction, and at least a portion of the arc segment opens toward the side where the tearing handle is located. At least a portion of the outer contour of the long strip segment is configured to be parallel to the tearing direction.

2. The protective film according to claim 1, characterized in that, The protective film body includes a plurality of extension strips formed by the cutting line, each extension strip being at least partially connected to the main body, and adjacent extension strips among the plurality of extension strips being disconnected; Preferably, the protective film body is quadrilateral, and the protective film body has a first vertex and a third vertex located on one diagonal, and a second vertex and a fourth vertex located on the other diagonal, and the film tearing handle is located at at least one of the first vertex, the second vertex, the third vertex and the fourth vertex; Preferably, the film-tearing handle is provided at at least one of the first apex and the third apex, and the film-tearing direction is the direction from one of the first apex and the third apex to the other; or, the film-tearing handle is provided at at least one of the second apex and the fourth apex, and the film-tearing direction is the direction from one of the second apex and the fourth apex to the other.

3. The protective film according to claim 1 or 2, characterized in that, The cutting line includes a plurality of interconnected first arcs, which are arranged along the longitudinal direction of the protective film. Each first arc is at least partially tangent to the tearing direction, and the opening of each first arc faces the location of the tearing handle.

4. The protective film according to claim 3, characterized in that, The cutting line includes a second arc, which connects two adjacent first arcs. The center of the second arc and the center of the first arc are located on opposite sides of the extension direction of the cutting line, and the radius of the second arc is smaller than the radius of the first arc. Preferably, the cutting line includes a first straight line extending in a direction parallel to the tearing direction, the first straight line connecting to the first first arc among a plurality of first arcs that is closest to the tearing handle, and the connection point between the first first arc and the first straight line being tangent to the first straight line. Preferably, the cutting line includes a second straight line extending along the tearing direction, the second straight line connecting to the tail first arc line among a plurality of first arc lines that is furthest from the tearing handle, and the connection point between the tail first arc line and the second straight line is tangent to the second straight line.

5. The protective film according to claim 4, characterized in that, The ratio of the radius of the first arc to the radius of the second arc is between 7 and 8.4; Preferably, the ratio of the radius of the first arc to the radius of the second arc is 7.

8.

6. The protective film according to claim 4, characterized in that, The cutting lines include multiple lines, which are arranged at transverse intervals intersecting the longitudinal direction. The extension strip is formed by cutting between two adjacent cutting lines. The extension strip is constructed to include the arc segment, and the outer contour of the arc segment along both sides of the transverse direction is the first arc line. Preferably, the main body is annular, and the plurality of extension strips are surrounded within the annulus.

7. The protective film according to claim 1 or 2, characterized in that, The extension strip includes a plurality of the elongated segments, which are arranged along a second direction intersecting the tearing direction, and adjacent elongated segments are at least partially disconnected. Preferably, the protective film body is divided into two disconnected sub-protective films by the cutting line. Each sub-protective film includes the main body and the extension strip at least partially connected to the main body. The two main bodies are located at opposite ends in the tearing direction. The extension strips of the two sub-protective films are arranged in an alternating manner, and each extension strip of the two sub-protective films is configured to include a long strip segment extending along the tearing direction. Preferably, the film-tearing handle includes two parts, which are located at opposite ends in the film-tearing direction, and are respectively connected to the two main body parts; Preferably, each of the sub-protective films includes a plurality of the extension strips, the plurality of extension strips in each of the sub-protective films are arranged at intervals along the second direction, a spacer groove is defined between two adjacent extension strips in each of the sub-protective films, and the extension strip of one of the two sub-protective films is embedded in the spacer groove of the other; Preferably, the protective film body is constructed as a quadrilateral, the protective film body has two intersecting diagonals, the tearing direction is parallel to the direction of one of the two diagonals corresponding to the tearing handle, the second direction is parallel to the direction of the other of the two diagonals, and the extension strips of each of the two sub-protective films are staggered along the second direction.

8. The protective film according to claim 7, characterized in that, The cutting line includes multiple inclined lines, a first connecting line, and a second connecting line. Each inclined line extends in a direction parallel to the tearing direction. The multiple inclined lines are arranged at intervals along the second direction. The ends of each pair of adjacent inclined lines are connected by the first connecting line or the second connecting line. The first connecting line, which is connected to one end of the inclined line in the extension direction, connects the current inclined line and the adjacent upstream inclined line. The second connecting line, which is connected to the other end of the inclined line in the extension direction, connects the current inclined line and the adjacent downstream inclined line. Preferably, the protective film body has a first edge and a second edge located at opposite ends in its longitudinal direction, and a plurality of inclined lines are arranged at intervals between the first edge and the second edge, and the inclined lines of the cutting lines that are close to the first edge extend to intersect the first edge, and the inclined lines of the cutting lines that are close to the second edge extend to intersect the second edge. Preferably, both the first connecting line and the second connecting line are arc-shaped, both are tangent to the inclined line, and the opening of one of the first connecting line and the second connecting line faces the side where one of the two film-tearing handles is located, while the opening of the other of the first connecting line and the second connecting line faces the side where the other of the film-tearing handles is located. Preferably, the arc centers of the first connecting line and the second connecting line are located on opposite sides of the extension direction of the cutting line, and the radii of the first connecting line and the second connecting line are the same.

9. A display module, characterized in that, It includes a display panel and a protective film as described in any one of claims 1-8, wherein the protective film is adhered to the display panel.

10. A method for removing a protective film, characterized in that, Includes the following steps: Provide a display module as described in claim 9 above; A force is applied to the film-tearing handle along the film-tearing direction, gradually causing the main body and the extension strip to detach from the display panel; The protective film body is quadrilateral, and the protective film body has a first vertex and a third vertex located on one diagonal, and a second vertex and a fourth vertex located on the other diagonal; The tearing handle is provided at at least one of the first apex and the third apex, and the tearing direction is configured such that one of the first apex and the third apex points to the other; or, the tearing handle is provided at at least one of the second apex and the fourth apex, and the tearing direction is configured such that one of the second apex and the fourth apex points to the other.

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