Display panel and manufacturing method thereof, polarizer raw material and manufacturing method thereof

Abstract

Embodiments of the present invention provide a display panel and a method for manufacturing the same, as well as a polarizer raw material and a method for manufacturing the same. The display panel includes a display substrate, a polarizer, a protective adhesive, and a cover plate; along a first direction, the polarizer includes a main region and an edge region, the edge region being a region corresponding to the edge film body of a first protective film used to cover the polarizer, and the main region being a region corresponding to the main film body of the first protective film; an end of the protective adhesive close to the display area contacts the end face of the edge region of the polarizer; the cover plate is attached to the side of the polarizer facing away from the display substrate by optical adhesive, and the optical adhesive covers the main region and edge region of the polarizer; the edge film body of the first protective film is used to be removed before applying the protective adhesive, so that in the thickness direction of the display panel, the end of the protective adhesive in contact with the edge region of the polarizer is not higher than the polarizer; the main film body of the first protective film is used to be removed after applying the protective adhesive and before attaching the cover plate.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a polarizer raw material and a manufacturing method thereof. Background Art

[0002] At present, OLED (Organic Light Emitting Diode) flexible display substrates have gradually been used in various electronic products as display components of electronic devices.

[0003] In related technologies, OLED display substrates use pad bending technology to bend a portion of the display substrate to the back side, thereby reducing the size of the lower frame and increasing the screen-to-body ratio. To improve the display effect, a polarizer (POL) is generally provided on the light-emitting surface of the display substrate. Natural light from the outside, that is, non-polarized light, can be converted into polarized light after passing through the polarizer. This effectively prevents natural light from being reflected after entering the display substrate, which is beneficial to improving the visual experience. The surface of the polarizer is generally also bonded with a cover glass (CG). The cover glass is set on the side of the polarizer away from the display substrate through optically clear adhesive (OCA). The cover glass can be used to protect the display substrate.

[0004] However, in the related art, bubbles are likely to form between the optical adhesive and the polarizer near the bending area, and cracks are likely to appear in the bending area of ​​the display substrate, resulting in defective display panels and poor product quality. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a display panel and its manufacturing method, as well as a polarizer material and its manufacturing method, to improve the lamination defects such as bubbles and bending cracks that occur during the process, thereby improving product quality. The specific technical solutions are as follows:

[0006] An embodiment of the first aspect of the present application provides a display panel, comprising a display substrate, having a display area and a non-display area, wherein the non-display area includes a bending area, and the bending area is located on one side of the display area in a first direction; a polarizer is located on the light-emitting side of the display substrate and at least covers the display area of ​​the display substrate; along the first direction, the polarizer includes a main area and an edge area, the edge area is an area corresponding to the edge film body portion of a first protective film used to cover the polarizer, and the main area is an area corresponding to the main film body portion of the first protective film; a protective glue is located on the light-emitting side of the display substrate and at least covers the main film body portion of the first protective film. Covering the bending area of ​​the display substrate; one end of the protective glue close to the display area is in contact with the end face of the edge area of ​​the polarizer; the cover plate is adhered to the side of the polarizer away from the display substrate through optical glue, and the optical glue covers the main area and edge area of ​​the polarizer; the edge film body of the first protective film is used to be removed before applying the protective glue, so that in the thickness direction of the display panel, the end of the protective glue in contact with the edge area of ​​the polarizer is not higher than the polarizer; the main film body of the first protective film is used to be removed after applying the protective glue and before adhering the cover plate.

[0007] In some embodiments of the present application, a size of the edge region of the polarizer in the first direction is 3-5 mm.

[0008] In the display panel provided in the embodiment of the present application, a polarizer is provided on the light-emitting side surface of the display substrate. The polarizer includes a main area and an edge area. The edge area is the area corresponding to the edge film body of the first protective film covering the polarizer, and the main area is the area corresponding to the main film body of the first protective film. A protective glue is also provided on the light-emitting side surface of the display substrate. The end of the protective glue close to the display area is in contact with the end face of the edge area of ​​the polarizer. The edge film body of the first protective film is used to be removed before applying the protective glue. Thus, when applying the protective glue, it is possible to avoid the situation where the end of the protective glue in contact with the edge area of ​​the polarizer has a thickness higher than the thickness of the polarizer due to capillary phenomenon. In this way, in the thickness direction of the display panel, the end of the protective glue in contact with the edge area of ​​the polarizer is not higher than the polarizer. In this way, when the cover plate is subsequently bonded by optical glue, bubbles can be avoided between the optical glue and the edge area of ​​the polarizer, which is conducive to improving poor bonding bubbles and improving product quality. In addition, since the end of the protective glue that contacts the edge area of ​​the polarizer is not higher than the polarizer, the thickness of the end of the protective glue close to the display area is lower. This allows the thickness of the protective glue at the bending position during the bending process to be consistent with the thickness of the bent part, thereby avoiding stress concentration at the bending position during the bending process, effectively improving bending crack defects, and further improving product quality.

[0009] An embodiment of the second aspect of the present application provides a polarizer raw material for preparing a display panel in any embodiment of the first aspect, the polarizer raw material includes a polarizer, the polarizer includes a main area and an edge area; a first protective film, covering one side surface of the polarizer, the first protective film is a split film, the first protective film includes a main film body and an edge film body, the main film body covers the main area of ​​the polarizer, and the edge film body covers the edge area of ​​the polarizer; the edge film body is used to be torn off before applying the protective glue, and the main film body is used to be torn off after applying the protective glue and before laminating the cover plate.

[0010] In some embodiments of the present application, the width of the edge film body is 3-5 mm.

[0011] In some embodiments of the present application, the polarizer raw material further includes a second protective film, which covers the surface of the polarizer facing away from the first protective film, and the second protective film is used to be torn off before the polarizer is attached to the display substrate.

[0012] The polarizer raw material of the embodiment of the present application includes a polarizer and a first protective film, the first protective film covering one side surface of the polarizer and being used to protect the polarizer. The first protective film is a split film, and the first protective film includes a main film body and an edge film body. By setting the first protective film as a split film, the main film body and the edge film body can be made into two independent parts, so that after the polarizer raw material is applied to the display panel, it is convenient to tear off the edge film body of the first protective film separately before applying the protective glue on the display substrate. Then, when applying the protective glue, it is possible to avoid the situation where the end of the protective glue in contact with the edge area of ​​the polarizer is thicker than the thickness of the polarizer due to capillary phenomenon, so that in the thickness direction of the display panel, the end of the protective glue in contact with the edge area of ​​the polarizer is not higher than the polarizer. In this way, when the cover plate is subsequently bonded by optical glue, bubbles can be avoided between the optical glue and the edge area of ​​the polarizer, which is conducive to improving poor bonding bubbles and improving product quality. In addition, since the end of the protective glue that contacts the edge area of ​​the polarizer is not higher than the polarizer, the thickness of the end of the protective glue close to the display area is lower. This allows the thickness of the protective glue at the bending position during the bending process to be consistent with the thickness of the bent part, thereby avoiding stress concentration at the bending position during the bending process, effectively improving bending crack defects, and further improving product quality.

[0013] An embodiment of a third aspect of the present application provides a method for manufacturing a display panel, which is used to manufacture the display panel of any embodiment of the first aspect. The manufacturing method includes:

[0014] A display substrate is provided; the display substrate has a display area and a non-display area, the non-display area includes a bending area, and the bending area is located on one side of the display area in a first direction;

[0015] A polarizer is attached; the surface of the polarizer is covered with a first protective film; the polarizer is attached to the light-emitting side surface of the display substrate, and the polarizer covers at least the display area of ​​the display substrate; along the first direction, the polarizer includes a main area and an edge area, the edge area is the area corresponding to the edge film body of the first protective film, and the main area is the area corresponding to the main film body of the first protective film;

[0016] removing the edge film portion of the first protective film;

[0017] Applying a protective adhesive; the protective adhesive is applied to the light-emitting side surface of the display substrate, the protective adhesive at least covers the bending area of ​​the display substrate, and one end of the protective adhesive close to the display area contacts the end surface of the edge area of ​​the polarizer;

[0018] removing the main film body of the first protective film;

[0019] Laminating the cover plate; the cover plate is laminated to the side of the polarizer facing away from the display substrate through optical adhesive, and the optical adhesive covers the main area and edge area of ​​the polarizer.

[0020] In some embodiments of the present application, the first protective film is a split film, and the edge film portion and the main film portion of the first protective film are two independent parts;

[0021] The removing of the edge film body portion of the first protective film specifically includes: directly tearing off the edge film body portion of the first protective film.

[0022] In some embodiments of the present application, the edge film body portion of the first protective film is integrated with the main film body portion;

[0023] The removing of the edge film body portion of the first protective film specifically includes: cutting off the edge film body portion of the first protective film by laser.

[0024] The display panel manufactured according to the manufacturing method of the embodiment of the present application is provided with a polarizer and a protective glue on its light-emitting side surface, and the end of the protective glue close to the display area contacts the end face of the edge area of ​​the polarizer. Compared with the solution in the related art in which the front protective film of the polarizer is completely torn off after the protective glue is applied, in the embodiment of the present application, by removing the edge film body of the first protective film before applying the protective glue, it is possible to avoid the situation in which the end of the protective glue in contact with the edge area of ​​the polarizer has a thickness higher than the thickness of the polarizer due to capillary phenomenon when applying the protective glue. As a result, in the thickness direction of the display panel, the end of the protective glue in contact with the edge area of ​​the polarizer is not higher than the polarizer. In this way, when the cover plate is subsequently bonded with the optical glue, the formation of bubbles between the optical glue and the edge area of ​​the polarizer can be avoided, which is conducive to improving poor bonding bubbles and improving product quality. In addition, since the end of the protective glue that contacts the edge area of ​​the polarizer is not higher than the polarizer, the thickness of the end of the protective glue close to the display area is lower. This allows the thickness of the protective glue at the bending position during the bending process to be consistent with the thickness of the bent part, thereby avoiding stress concentration at the bending position during the bending process, effectively improving bending crack defects, and further improving product quality.

[0025] An embodiment of a fourth aspect of the present application provides a method for manufacturing a polarizer material, which is used to manufacture the polarizer material in any embodiment of the second aspect. The manufacturing method includes:

[0026] Providing a polarizer raw material motherboard, wherein the polarizer raw material motherboard includes a large polarizer plate and a first integral protective film attached to one side surface of the large polarizer plate;

[0027] cutting the first entire protective film to form a plurality of cutting lines on the first entire protective film;

[0028] Cutting the polarizer raw material motherboard as a whole so that the polarizer large plate is divided into a plurality of polarizers, and at the same time, the first whole protective film is divided into a plurality of first protective films;

[0029] The polarizer raw material motherboard after overall cutting is separated to obtain a plurality of polarizer raw materials with preset sizes; the polarizer raw material includes one polarizer and a corresponding first protective film; the first protective film is a split film, and the first protective film is divided into a main film body and an edge film body by the cutting line, the main film body covers the main area of ​​the polarizer, and the edge film body covers the edge area of ​​the polarizer; the edge film body is used to be torn off before applying the protective glue, and the main film body is used to be torn off after applying the protective glue and before attaching the cover plate.

[0030] In some embodiments of the present application, the first full protective film is adhered to the surface of the polarizer plate via an adhesive layer; and after the first full protective film is cut to form a plurality of cutting lines on the first full protective film, the method further includes:

[0031] Partial exposure is performed on an area between two adjacent cutting lines, and the exposed area corresponds to an edge film body portion of each first protective film.

[0032] The polarizer raw material manufactured according to the manufacturing method of the embodiment of the present application includes a polarizer and a first protective film, the first protective film covering one side surface of the polarizer and being used to protect the polarizer. The first protective film is a split film, and the first protective film includes a main film body and an edge film body. By setting the first protective film as a split film, the main film body and the edge film body can be made into two independent parts, so that after the polarizer raw material is applied to the display panel, it is convenient to tear off the edge film body of the first protective film separately before applying the protective glue on the display substrate. When applying the protective glue, it is possible to avoid the situation where the end of the protective glue that contacts the edge area of ​​the polarizer is thicker than the thickness of the polarizer due to capillary phenomenon, so that in the thickness direction of the display panel, the end of the protective glue that contacts the edge area of ​​the polarizer is not higher than the polarizer. In this way, when the cover plate is subsequently bonded by optical glue, bubbles can be avoided between the optical glue and the edge area of ​​the polarizer, which is conducive to improving poor bonding bubbles and improving product quality. In addition, since the end of the protective glue that contacts the edge area of ​​the polarizer is not higher than the polarizer, the thickness of the end of the protective glue close to the display area is lower. This allows the thickness of the protective glue at the bending position during the bending process to be consistent with the thickness of the bent part, thereby avoiding stress concentration at the bending position during the bending process, effectively improving bending crack defects, and further improving product quality.

[0033] Of course, it is not necessary to achieve all of the advantages described above simultaneously in order to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0035] Figure 1a Schematic diagram of a thickness-direction cross-section of a display panel in the related art when MCL glue is applied;

[0036] Figure 1b Schematic diagram of a thickness-direction cross-section of a display panel in related art when attached to a cover plate;

[0037] Figure 1c is a schematic diagram of a cross-section in the thickness direction of a display panel during a bending process in the related art;

[0038] Figure 2a This is a schematic structural diagram of the display panel in the thickness direction of an embodiment of the first aspect of the present application (the display substrate is in a flattened state);

[0039] Figure 2b for Figure 2a The cross-sectional view of the display panel after bending is shown;

[0040] Figure 3a for Figure 2a The structure diagram of the display panel before the protective glue is applied is shown;

[0041] Figure 3b for Figure 3a A schematic structural diagram of the display panel after the edge film portion of the first protective film is removed;

[0042] Figure 3c for Figure 3b The structure diagram of the display panel after being coated with protective glue is shown;

[0043] Figure 3d for Figure 3c A schematic structural diagram of the display panel after the main film body of the first protective film is removed;

[0044] Figure 4a This is a schematic structural diagram of a polarizer material according to the second embodiment of the present application;

[0045] Figure 4b for Figure 4a The cross-sectional view of the polarizer material shown is at AA;

[0046] Figure 5a This is a schematic diagram of a manufacturing process of a display panel according to Example 1 of the third aspect of the present application;

[0047] Figure 5b for Figure 5a The specific process diagram of the display panel manufacturing process is shown;

[0048] Figure 6a This is a schematic diagram of a partial manufacturing process of a display panel according to Example 2 of the third aspect of the present application;

[0049] Figure 6b for Figure 6a The specific process diagram of the display panel manufacturing process is shown;

[0050] Figure 7Schematic diagram 1 of the production process of the polarizer material according to the fourth embodiment of the present application;

[0051] Figure 8 This is a second schematic diagram of the production process of the polarizer raw material of the fourth embodiment of the present application.

[0052] Figures 1a to 1c Center: Display substrate 90; polarizer 91; front protective film 92; MCL adhesive 93; optical adhesive 94; cover plate 95; bubble 96; bending position 97;

[0053] Figures 2a to 8 Middle: display panel 10; display substrate 110; polarizer 120; main area 121; edge area 122; protective adhesive 130; cover plate 140; optical adhesive 150; back film 160; slot 161; polarizer raw material 20; first protective film 210; main film body 211; edge film body 212; second protective film 220; adhesive layer 230; polarizer raw material motherboard 30; polarizer large plate 310; first full protective film 320; second full protective film 330; mask plate 400; irradiation light source 500; laser 600; cutting line 601; display area AA; bending area BA; first direction X; thickness direction Z. DETAILED DESCRIPTION

[0054] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field based on this application are within the scope of protection of the present invention.

[0055] As mentioned in the background art, in the related art, bubbles are likely to form between the optical adhesive and the polarizer near the bending area, and cracks are likely to appear in the bending area of ​​the display substrate, resulting in defective display panels and poor product quality.

[0056] Specifically, see Figures 1a to 1c ,in, Figure 1a Schematic diagram of a thickness-direction cross-section of a display panel in the related art when MCL glue is applied; Figure 1b Schematic diagram of a thickness-direction cross-section of a display panel in the related art when attached to a cover plate Figure 1c FIG. 1 is a schematic diagram of a thickness-direction cross-section of a display panel during a bending process in the related art.

[0057] In the related art, MCL glue 93 (Metal Cover Layer) is generally applied to the bending area of ​​the display substrate 90 to protect the bending area. One end of the MCL glue 93 contacts the end of the polarizer 91. The inventors have found that Figure 1a As shown, when the MCL glue 93 is applied, the front protective film 92 on the upper surface of the polarizer 91 has not been removed. During the coating process of the MCL glue 93, due to the capillary phenomenon, the thickness of the end of the MCL glue 93 that contacts the polarizer 91 will be higher than that of other areas of the MCL glue 93. Its thickness will exceed the thickness of the polarizer 91 and even be flush with the front protective film 92 of the polarizer 91. Figure 1b As shown, when the front protective film 92 is subsequently removed and the optical adhesive 94 and the cover plate 95 are attached, since the thickness of the end of the MCL adhesive 93 that contacts the polarizer 91 is higher than that of the polarizer 91, it is easy to form bonding bubbles 96 between the optical adhesive 94 and the polarizer 91, affecting the product quality. Figure 1c As shown, since the end of the MCL glue 93 that contacts the polarizer 91 is higher, and the bending position 97 of the MCL glue 93 is close to the end, the thickness of the MCL glue 93 at the bending position 97 will be thicker than its bent part, resulting in stress concentration at the bending position 97 during the bending process, causing the inorganic layer and other film layers of the display substrate 90 to break, resulting in bending cracks, and affecting product quality.

[0058] In view of this, the embodiment of the first aspect of the present application provides a display panel 10, see Figures 2a to 3d ,in, Figure 2a Schematic diagram of the structure of the display panel 10 in the thickness direction Z according to the embodiment of the first aspect of the present application (the display substrate 110 is in a flattened state); Figure 2b for Figure 2a The cross-sectional view of the display panel 10 after being bent is shown; Figure 3a for Figure 2a The structure diagram of the display panel 10 before the protective glue 130 is applied; Figure 3b for Figure 3a A schematic structural diagram of the display panel 10 after the edge film portion 212 of the first protective film 210 is removed; Figure 3c for Figure 3b The structure diagram of the display panel 10 after being coated with the protective glue 130 is shown; Figure 3d for Figure 3c FIG. 1 is a schematic structural diagram of the display panel 10 after the main film body 211 of the first protective film 210 is removed.

[0059] like Figure 2a 、 Figure 2b and Figure 3aAs shown, the display panel 10 includes a display substrate 110, a polarizer 120, a protective film 130, and a cover plate 140. The display substrate 110 has a display area AA and a non-display area. The non-display area includes a bending area BA, which is located to one side of the display area AA in a first direction X. The polarizer 120 is located on the light-emitting side of the display substrate 110 and covers at least the display area AA of the display substrate 110. Along the first direction X, the polarizer 120 includes a main region 121 and an edge region 122. The edge region 122 corresponds to the edge film portion 212 of the first protective film 210 used to cover the polarizer 120, while the main region 121 corresponds to the main film portion 211 of the first protective film 210. The protective film 130 is located on the light-emitting side of the display substrate 110 and covers at least the bending area BA of the display substrate 110. The end of the protective film 130, which is closest to the display area AA, contacts the end surface of the edge region 122 of the polarizer 120. The cover plate 140 is attached to the side of the polarizer 120 away from the display substrate 110 through the optical adhesive 150, and the optical adhesive 150 covers the main area 121 and the edge area 122 of the polarizer 120. Figures 2a to 3d As shown, the edge film body 212 of the first protective film 210 is used to be removed before applying the protective glue 130, so that in the thickness direction Z of the display panel 10, the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120; the main film body 211 of the first protective film 210 is used to be removed after applying the protective glue 130 and before bonding the optical glue 150.

[0060] In the display panel 10 provided in the embodiment of the present application, a polarizer 120 is provided on the light-emitting surface of the display substrate 110. The polarizer 120 includes a main region 121 and an edge region 122. The edge region 122 corresponds to the edge film body 212 of the first protective film 210 covering the polarizer 120, and the main region 121 corresponds to the main film body 211 of the first protective film 210. A protective adhesive 130 is also provided on the light-emitting surface of the display substrate 110. The end of the protective adhesive 130, which is adjacent to the display area AA, contacts the end surface of the edge region 122 of the polarizer 120. The edge film body 212 of the first protective film 210 is used to be removed before applying the protective glue 130. Therefore, when applying the protective glue 130, it is possible to avoid the situation where the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is thicker than the thickness of the polarizer 120 due to capillary phenomenon, so that in the thickness direction Z of the display panel 10, the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120. In this way, when the cover plate 140 is subsequently bonded by the optical glue 150, bubbles can be avoided from forming between the optical glue 150 and the edge area 122 of the polarizer 120, which is beneficial to improving poor bonding bubbles and improving product quality. In addition, since the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120, the thickness of the end of the protective glue 130 close to the display area AA is relatively low. This allows the thickness of the protective glue 130 at the bending position during the bending process to be consistent with the thickness of the bent portion, thereby avoiding stress concentration at the bending position during the bending process, effectively improving bending crack defects, and further improving product quality.

[0061] In the embodiment of the present application, the display substrate 110 may be a display substrate using OLED (Organic Light Emitting Diode) technology or a display substrate using Micro-OLED (Micro Organic Light-Emitting Diode) technology, etc., and the present application does not make any specific limitation on this.

[0062] Optionally, the polarizer 120 may be a metal polarizer, an iodine-based polarizer, a dye-based polarizer, a polyethylene polarizer, etc. The present application does not limit the material of the polarizer 120 .

[0063] In the embodiment of the present application, the first protective film 210 of the polarizer 120 may also be referred to as a front protective film. The protective adhesive 130 may be MCL adhesive.

[0064] In the embodiment of the present application, the cover plate 140 is located on the side of the polarizer 120 facing away from the display substrate 110. The cover plate 140 protects the display substrate 110. The optical adhesive 150 used to secure the cover plate 140 simplifies and secures its installation. Furthermore, the optical adhesive 150 has good optical transmittance and a refractive index similar to that of glass, minimizing the impact on the display quality.

[0065] Preferably, in the embodiment of the present application, the edge region 122 of the polarizer 120 has a dimension of 3-5 mm in the first direction X, that is, a width of the edge region 122 of the polarizer 120 is 3-5 mm. Accordingly, the width of the edge film body 212 of the first protective film 210 is 3-5 mm. This prevents the edge film body 212 from being too narrow, facilitating removal of the edge film body 212, while also avoiding inconvenience in subsequent processes caused by the wider edge film body 212.

[0066] like Figure 2a and Figure 2b As shown, the display panel 10 further includes a back film 160, which is disposed on the backlight side of the display substrate 110 to protect the display substrate 110. The back film 160 is provided with a groove 161, which corresponds to the bending area BA of the display substrate 110 and extends through the back film 160 in the thickness direction Z. Providing the groove 161 on the back film 160, and having the groove 161 correspond to the bending area BA, can prevent stress concentration in the bending area BA of the back film 160, thereby extending the service life of the back film 160.

[0067] In other embodiments of the present application, other functional film layers, such as at least one of a touch function layer, an anti-reflection layer, an anti-fingerprint layer, and a hardening layer, may be disposed between the display substrate 110 and the cover plate 140 to enable the display panel 10 to achieve different functions. This application does not limit this.

[0068] See also Figure 4a and Figure 4b ,in, Figure 4a This is a schematic structural diagram of a polarizer material 20 according to the second embodiment of the present application; Figure 4b for Figure 4a The cross-sectional view of the polarizer material 20 is shown at AA.

[0069] like Figure 4a and Figure 4bAs shown, an embodiment of the second aspect of the present application provides a polarizer raw material 20 for preparing the display panel 10 in any embodiment of the first aspect. The polarizer raw material 20 includes a polarizer 120 and a first protective film 210. The polarizer 120 includes a main area 121 and an edge area 122. The first protective film 210 covers one side surface of the polarizer 120. The first protective film 210 is a split film. The first protective film 210 includes a main film body 211 and an edge film body 212. The main film body 211 covers the main area 121 of the polarizer 120, and the edge film body 212 covers the edge area 122 of the polarizer 120; the edge film body 212 is used to be torn off before applying the protective glue, and the main film body 211 is used to be torn off after applying the protective glue and before attaching the cover plate.

[0070] The polarizer material 20 of the embodiment of the present application includes a polarizer 120 and a first protective film 210. The first protective film 210 covers one side surface of the polarizer 120 and is used to protect the polarizer 120. The first protective film 210 is a split film, and the first protective film 210 includes a main film body 211 and an edge film body 212. By setting the first protective film 210 as a split film, the main film body 211 and the edge film body 212 are two independent parts, so that after the polarizer material 20 is applied to the display panel 10, as shown in FIG. Figures 3a to 3c As shown, it is convenient to tear off the edge film body 212 of the first protective film 210 separately before applying the protective glue 130 to the display substrate 110. Therefore, when applying the protective glue 130, it is possible to avoid the situation where the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is thicker than the thickness of the polarizer 120 due to the capillary phenomenon. As a result, in the thickness direction Z of the display panel 10, the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120. In this way, when the cover plate 140 is subsequently attached by the optical glue 150, as shown in FIG. Figure 2a As shown, it is possible to avoid bubbles forming between the optical adhesive 150 and the edge region 122 of the polarizer 120, which is beneficial to improve the poor bonding and improve product quality. In addition, since the end of the protective adhesive 130 that contacts the edge region 122 of the polarizer 120 is not higher than the polarizer 120, as shown in FIG. Figure 2b As shown, the thickness of the end of the protective glue 130 close to the display area AA is lower, so that the thickness of the protective glue 130 at the bending starting position during the bending process can be consistent with the thickness of the bent part, thereby avoiding stress concentration at the bending starting position during the bending process, effectively improving the bending crack defect, and further improving product quality.

[0071] like Figure 4aAs shown, the edge film body 212 is generally strip-shaped. Preferably, the width of the edge film body 212 is 3-5 mm. This prevents the edge film body 212 from being too narrow, facilitating its removal, while also avoiding the inconvenience that would otherwise be caused by a wider edge film body 212 in subsequent processes.

[0072] like Figure 4b As shown, the polarizer material 20 also includes a second protective film 220. The second protective film 220 covers the side of the polarizer 120 facing away from the first protective film 210. The second protective film 220 is designed to be removed before the polarizer 120 is attached to the display substrate 110. By providing the first protective film 210 and the second protective film 220, the opposite sides of the polarizer 120 can be protected separately. The first protective film 210 can also be referred to as the front protective film, and the second protective film 220 can also be referred to as the back protective film.

[0073] The first protective film 210 and the second protective film 220 can be attached to opposite surfaces of the polarizer 120 via adhesive layers 230. Preferably, the viscosity of the adhesive layer at the corresponding portion of the edge film portion 212 of the first protective film 210 is lower than the viscosity of the remaining portion of the adhesive layer 230. This facilitates the removal of the edge film portion 212.

[0074] See also Figure 5a , Figure 5a This is a schematic diagram of the manufacturing process of the display panel 10 according to the first embodiment of the third aspect of the present application.

[0075] like Figure 5a As shown, the first embodiment of the third aspect of the present application provides a method for manufacturing a display panel 10, which is used to manufacture the display panel 10 of any embodiment of the first aspect. The manufacturing method includes:

[0076] S10, providing a display substrate 110; the display substrate 110 has a display area AA and a non-display area, the non-display area includes a bending area BA, and the bending area BA is located on one side of the display area AA in the first direction X;

[0077] S11. Laminating the polarizer 120. The surface of the polarizer 120 is covered with a first protective film 210. The polarizer 120 is laminated to the light-emitting surface of the display substrate 110. The polarizer 120 covers at least the display area AA of the display substrate 110. Along the first direction X, the polarizer 120 includes a main region 121 and an edge region 122. The edge region 122 is a region corresponding to the edge film body 212 of the first protective film 210. The main region 121 is a region corresponding to the main film body 211 of the first protective film 210.

[0078] S12, removing the edge film portion 212 of the first protective film 210;

[0079] S13, applying a protective adhesive 130; the protective adhesive 130 is applied to the light-emitting side surface of the display substrate 110, and the protective adhesive 130 at least covers the bending area BA of the display substrate 110, and the end of the protective adhesive 130 close to the display area AA contacts the end surface of the edge area 122 of the polarizer 120;

[0080] S14, removing the main film body 211 of the first protective film 210;

[0081] S15 , attaching the cover plate 140 ; ​​the cover plate 140 is attached to the side of the polarizer 120 facing away from the display substrate 110 through the optical adhesive 150 , and the optical adhesive 150 covers the main area 121 and the edge area 122 of the polarizer 120 .

[0082] The display panel 10 manufactured according to the manufacturing method of an embodiment of the present application has a polarizer 120 and a protective glue 130 provided on its light-emitting side surface, and the end of the protective glue 130 close to the display area AA contacts the end surface of the edge area 122 of the polarizer 120. Compared with the solution in the related art of tearing off the front protective film 92 of the polarizer 91 as a whole after applying the MCL glue 93, in the embodiment of the present application, by removing the edge film body 212 of the first protective film 210 before applying the protective glue 130, it is possible to avoid the situation when applying the protective glue 130 that the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 has a thickness higher than the thickness of the polarizer 120 due to the capillary phenomenon, so that in the thickness direction Z of the display panel 10, the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120. In this way, when the cover plate 140 is subsequently bonded by the optical glue 150, bubbles can be avoided from forming between the optical glue 150 and the edge area 122 of the polarizer 120, which is beneficial to improving poor bonding bubbles and improving product quality. In addition, since the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120, the thickness of the end of the protective glue 130 close to the display area AA is relatively low. This allows the thickness of the protective glue 130 at the bending position during the bending process to be consistent with the thickness of the bent portion, thereby avoiding stress concentration at the bending position during the bending process, effectively improving bending crack defects, and further improving product quality.

[0083] like Figure 5a As shown, in the embodiment of the present application, the first protective film 210 is a split film, and the edge film body 212 and the main film body 211 of the first protective film 210 are two independent parts; step S12 of removing the edge film body 212 of the first protective film 210 specifically includes: S121, directly tearing off the edge film body 212 of the first protective film 210.

[0084] By configuring the first protective film 210 as a split film, the main film portion 211 and the edge film portion 212 of the first protective film 210 can be formed into two independent parts, thereby facilitating the removal of the edge film portion 212 during the process.

[0085] See also Figure 5b , Figure 5b for Figure 5a FIG. 1 is a schematic diagram showing a specific process flow of the manufacturing process of the display panel 10 .

[0086] like Figure 5b As shown, in a specific embodiment, the surface of the polarizer 120 is further covered with a second protective film, and the second protective film is located on the side of the polarizer 120 facing away from the first protective film 210. Before step S11 of laminating the polarizer 120, the process further includes: S101, removing the second protective film on the surface of the polarizer 120.

[0087] It should be noted that the first protective film 210 may also be referred to as a front protective film, and the second protective film 220 may also be referred to as a back protective film. By providing the first protective film 210 and the second protective film 220, the two opposite surfaces of the polarizer 120 can be protected respectively.

[0088] Furthermore, after applying the protective glue 130 in step S13 and before removing the main film body 211 of the first protective film 210 in step S14, the process further includes: an OLB (Outer Lead Bonding) process, a Laser (laser cutting) process, and a Test (testing) process.

[0089] Specifically, during the OLB process, a chip-on-film (COF) is attached to the edge of the display substrate 110, and a printed circuit board (PCB) is attached to the COF. During the laser process, the dummy portion of the display panel 10 is removed to give the display panel 10 a predetermined shape. During the test process, optical testing is performed.

[0090] After step S15 of attaching the cover plate 140 , the following steps are further performed: Test 2 (second test), Bending, and Packing. In the Test 2, the display panel 10 is mainly optically modulated to achieve a better display effect.

[0091] See also Figure 6a , Figure 6a This is a schematic diagram of a portion of the manufacturing process of the display panel 10 according to the second embodiment of the third aspect of the present application.

[0092] like Figure 6a As shown, in the second embodiment of the present application, unlike the first embodiment, the first protective film 210 on the surface of the polarizer 120 is not a separate film, but a complete protective film, and the edge film body 212 of the first protective film 210 is integrated with the main film body 211. Step S12 of removing the edge film body 212 of the first protective film 210 specifically includes: S122, cutting the edge film body 212 of the first protective film 210 using a laser 600.

[0093] Therefore, the manufacturing process of the first protective film 210 can be simplified, which is beneficial to reducing the manufacturing cost of the polarizer material 20 .

[0094] After the edge film portion 212 of the first protective film 210 is removed by laser 600 in step S122, the process further includes cleaning the cut portion in step S123. Optionally, the cleaning method includes air blowing, USC (Ultra Sonic Cleaning) or plasma cleaning.

[0095] See also Figure 6b , Figure 6b for Figure 6a FIG. 1 is a schematic diagram showing a specific process flow of the manufacturing process of the display panel 10 .

[0096] Figure 6b The process flow diagram shown is Figure 5b The difference between the process flow chart shown is that after the polarizer 120 is attached in step S11 , step S122 is taken to remove the edge film portion 212 of the first protective film 210 by laser 600 .

[0097] See also Figure 7 , Figure 7 Schematic diagram 1 of the manufacturing process of the polarizer material 20 according to the fourth embodiment of the present application.

[0098] like Figure 7 As shown, an embodiment of the fourth aspect of the present application provides a method for manufacturing a polarizer material 20, which is used to manufacture the polarizer material 20 in any embodiment of the second aspect. The manufacturing method includes:

[0099] S20, providing a polarizer raw material motherboard 30, wherein the polarizer raw material motherboard 30 includes a polarizer large plate 310 and a first integral protective film 320 attached to one side surface of the polarizer large plate 310;

[0100] S21, cutting the first entire protective film 320 to form a plurality of cutting lines 601 on the first entire protective film 320;

[0101] S22, cutting the polarizer raw material motherboard 30 as a whole, so that the polarizer large plate 310 is divided into a plurality of polarizers 120, and at the same time, the first whole protective film 320 is divided into a plurality of first protective films 210;

[0102] S23. Separate the overall cut polarizer raw material motherboard 30 to obtain a plurality of polarizer raw materials 20 with preset sizes; the polarizer raw material 20 includes a polarizer 120 and a corresponding first protective film 210; the first protective film 210 is a split film, and the first protective film 210 is divided into a main film body 211 and an edge film body 212 by a cutting line 601, the main film body 211 covers the main area 121 of the polarizer 120, and the edge film body 212 covers the edge area 122 of the polarizer 120; the edge film body 212 is used to be torn off before applying the protective glue 130, and the main film body 211 is used to be torn off after applying the protective glue 130 and before attaching the cover plate 140.

[0103] The polarizer raw material 20 manufactured by the manufacturing method of the embodiment of the present application comprises a polarizer 120 and a first protective film 210. The first protective film 210 covers one side surface of the polarizer 120 and is used to protect the polarizer 120. The first protective film 210 is a split film, and the first protective film 210 includes a main film body 211 and an edge film body 212. By setting the first protective film 210 as a split film, the main film body 211 and the edge film body 212 can be made into two independent parts, so that after the polarizer raw material 20 is applied to the display panel 10, as shown in FIG. Figures 3a to 3c As shown, it is convenient to tear off the edge film body 212 of the first protective film 210 separately before applying the protective glue 130 to the display substrate 110. Therefore, when applying the protective glue 130, it is possible to avoid the situation where the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is thicker than the thickness of the polarizer 120 due to the capillary phenomenon. As a result, in the thickness direction Z of the display panel 10, the end of the protective glue 130 that contacts the edge area 122 of the polarizer 120 is not higher than the polarizer 120. In this way, when the cover plate 140 is subsequently attached by the optical glue 150, as shown in FIG. Figure 2a As shown, it is possible to avoid bubbles forming between the optical adhesive 150 and the edge region 122 of the polarizer 120, which is beneficial to improve the poor bonding and improve product quality. In addition, since the end of the protective adhesive 130 that contacts the edge region 122 of the polarizer 120 is not higher than the polarizer 120, as shown in FIG. Figure 2b As shown, the thickness of the end of the protective glue 130 close to the display area AA is lower, so that the thickness of the protective glue 130 at the bending starting position during the bending process can be consistent with the thickness of the bent part, thereby avoiding stress concentration at the bending starting position during the bending process, effectively improving the bending crack defect, and further improving product quality.

[0104] In a specific embodiment, the first entire protection film 320 may be cut using a laser 600 .

[0105] In the embodiments of this application, Figure 7 As shown, the first full protective film 320 is attached to the surface of the polarizer plate 310 via the adhesive layer 230. In step S21, while cutting the first full protective film 320, the adhesive layer 230 between the first full protective film 320 and the polarizer plate 310 is also cut, that is, the cutting needs to be carried out to the adhesive layer 230. This facilitates the subsequent removal of the edge film portion 212.

[0106] See also Figure 8 , Figure 8 This is a second schematic diagram of the production process of the polarizer material 20 according to the fourth embodiment of the present application.

[0107] like Figure 8 As shown, in an embodiment of the present application, step S21 cuts the first entire protective film 320, and after forming multiple cutting lines 601 on the first entire protective film 320, it also includes: S211, locally exposing the area between two adjacent cutting lines 601, and the exposed area corresponds to the edge film body 212 of each first protective film 210.

[0108] Specifically, if Figure 8 As shown, during local exposure, a mask 400 can be used to block the local area between two adjacent cutting lines 601. The blocked area corresponds to the main film portion 211 of the first protective film 210. A light source 500 is used to perform UV exposure on the unblocked area. The exposed area corresponds to the edge film portion 212 of each first protective film 210. This allows the edge film portion 212 of the first protective film 210 to be exposed, debonding the adhesive layer at the corresponding position of the edge film portion 212, reducing its viscosity and facilitating removal of the edge film portion 212.

[0109] like Figure 7 As shown, in the embodiment of the present application, step S20 of providing the polarizer raw material motherboard 30 specifically includes:

[0110] S201, providing a large polarizer plate 310;

[0111] S202 , attaching a first protective film 320 to one side surface of the polarizer plate 310 .

[0112] Furthermore, the polarizer motherboard 30 further includes a second protective film 330, which is attached to the surface of the polarizer plate 310 facing away from the first protective film 320. Step S202 includes attaching the first protective film 320 to one surface of the polarizer plate 310 and also attaching the second protective film 330 to the opposite surface of the polarizer plate 310. Step S22 also includes cutting the polarizer motherboard 30 as a whole, and then cutting the second protective film 330 into a plurality of second protective films 220. The polarizer material 20 further includes a second protective film 220, which is attached to the side of the polarizer 120 facing away from the first protective film 210.

[0113] It is understandable that for the sake of illustration, the ratio of the thickness of each film layer to the length and width of the film layer in the drawings of this application may be distorted.

[0114] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0115] Each embodiment in this specification is described in a related manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiment is generally similar to the method embodiment, so the description is relatively simple. For related parts, refer to the description of the method embodiment.

[0116] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: A display substrate having a display area and a non-display area, wherein the non-display area includes a bending area, and the bending area is located on one side of the display area in a first direction; a polarizer located on the light-emitting side of the display substrate and covering at least the display area of ​​the display substrate; along the first direction, the polarizer includes a main region and an edge region, the edge region being a region corresponding to the edge film body portion of the first protective film used to cover the polarizer, and the main region being a region corresponding to the main film body portion of the first protective film; A protective adhesive is located on the light-emitting side of the display substrate and covers at least the bending area of ​​the display substrate; an end of the protective adhesive close to the display area contacts an end surface of an edge area of ​​the polarizer; a cover plate, attached to a side of the polarizer facing away from the display substrate by optical adhesive, wherein the optical adhesive covers a main area and an edge area of ​​the polarizer; The edge film body of the first protective film is used to be removed before applying the protective glue, so that in the thickness direction of the display panel, the end of the protective glue in contact with the edge area of ​​the polarizer is not higher than the polarizer; the main film body of the first protective film is used to be removed after applying the protective glue and before attaching the cover plate.

2. The display panel according to claim 1, wherein: The size of the edge area of ​​the polarizer in the first direction is 3-5 mm.

3. A polarizer raw material, characterized in that: For preparing the display panel according to any one of claims 1 to 2, the polarizer raw material comprises: A polarizer, comprising a main region and an edge region; A first protective film covers one side surface of the polarizer. The first protective film is a split film, comprising a main film body and an edge film body. The main film body covers the main area of ​​the polarizer, and the edge film body covers the edge area of ​​the polarizer. The edge film body is used to be torn off before applying the protective glue, and the main film body is used to be torn off after applying the protective glue and before attaching the cover plate.

4. The polarizer material according to claim 3, characterized in that: The width of the edge membrane body is 3-5 mm.

5. The polarizer material according to claim 3, characterized in that: The polarizer material further includes a second protective film, which covers a surface of the polarizer that is away from the first protective film. The second protective film is used to be torn off before the polarizer is attached to the display substrate.

6. A method for manufacturing a display panel, characterized in that: For manufacturing the display panel according to any one of claims 1-2, the manufacturing method comprises: A display substrate is provided; the display substrate has a display area and a non-display area, the non-display area includes a bending area, and the bending area is located on one side of the display area in a first direction; A polarizer is attached; the surface of the polarizer is covered with a first protective film; the polarizer is attached to the light-emitting side surface of the display substrate, and the polarizer covers at least the display area of ​​the display substrate; along the first direction, the polarizer includes a main area and an edge area, the edge area is the area corresponding to the edge film body of the first protective film, and the main area is the area corresponding to the main film body of the first protective film; removing the edge film portion of the first protective film; Applying a protective adhesive; the protective adhesive is applied to the light-emitting side surface of the display substrate, the protective adhesive at least covers the bending area of ​​the display substrate, and one end of the protective adhesive close to the display area contacts the end surface of the edge area of ​​the polarizer; removing the main film body of the first protective film; Laminating the cover plate; the cover plate is laminated to the side of the polarizer facing away from the display substrate through optical adhesive, and the optical adhesive covers the main area and edge area of ​​the polarizer.

7. The method for manufacturing a display panel according to claim 6, wherein: The first protective film is a split film, wherein the edge film portion and the main film portion of the first protective film are two independent parts; The removing of the edge film body portion of the first protective film specifically includes: directly tearing off the edge film body portion of the first protective film.

8. The method for manufacturing a display panel according to claim 6, wherein: The edge film body of the first protective film is integrated with the main film body; The removing of the edge film body portion of the first protective film specifically includes: cutting off the edge film body portion of the first protective film by laser.

9. A method for producing a polarizer material, characterized in that: Used to prepare the polarizer raw material according to any one of claims 3 to 5, the preparation method comprising: Providing a polarizer raw material motherboard, wherein the polarizer raw material motherboard includes a large polarizer plate and a first integral protective film attached to one side surface of the large polarizer plate; cutting the first entire protective film to form a plurality of cutting lines on the first entire protective film; Cutting the polarizer raw material motherboard as a whole so that the polarizer large plate is divided into a plurality of polarizers, and at the same time, the first whole protective film is divided into a plurality of first protective films; The polarizer raw material motherboard after overall cutting is separated to obtain a plurality of polarizer raw materials with preset sizes; the polarizer raw material includes one polarizer and a corresponding first protective film; the first protective film is a split film, and the first protective film is divided into a main film body and an edge film body by the cutting line, the main film body covers the main area of ​​the polarizer, and the edge film body covers the edge area of ​​the polarizer; the edge film body is used to be torn off before applying the protective glue, and the main film body is used to be torn off after applying the protective glue and before attaching the cover plate.

10. The method for producing a polarizer material according to claim 9, wherein: The first protective film is adhered to the surface of the polarizer plate through an adhesive layer; after the first protective film is cut to form a plurality of cutting lines on the first protective film, the method further includes: Partial exposure is performed on an area between two adjacent cutting lines, and the exposed area corresponds to an edge film body portion of each first protective film.

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