Display module and method for preparing the same

Abstract

The present invention provides a display module and a method for preparing the display module. The display module includes a display panel, a polarizer disposed on the display side of the display panel, and an optical adhesive layer disposed on the side of the polarizer away from the display panel; a first side edge of the optical adhesive layer exceeds the corresponding side edge of the polarizer, and the optical adhesive layer is provided with a plurality of first preset cutting lines near the first side edge, and at least one of the first preset cutting lines has a positive projection on the plane where the polarizer is located that falls on the polarizer, and the distance to the corresponding side edge of the polarizer is less than a preset value. By adopting the solution of the present invention, after the optical adhesive layer is bonded, the portion of the optical adhesive layer that exceeds the polarizer can be selectively removed from one of the first preset cutting lines, so as to avoid excessive exposure of the polarizer relative to the optical adhesive layer, thereby causing display abnormalities and other problems.

Description

Technical Field

[0001] The present invention relates to a display module and a method for manufacturing the display module, and belongs to the technical field of displays. Background Art

[0002] OLED (Organic Light-Emitting Diode) has a series of advantages such as self-luminescence, wide viewing angle, light weight, thinness, high brightness, low power consumption, and fast response. Therefore, OLED display panels have become very popular display devices at home and abroad and have broad application prospects.

[0003] When manufacturing a display module based on an OLED display panel, in some solutions, a polarizer is disposed on the display side of the display panel, and then a cover plate is bonded to the polarizer using an optical adhesive layer, so as to protect the polarizer and the display panel with the optical adhesive layer and the cover plate together. However, limited by the accuracy of the equipment, the attached optical adhesive layer may be offset, causing a relatively large part of the polarizer to be exposed outside the optical adhesive layer, and thus the problem that the polarizer may fail and cause display anomalies may occur. Summary of the Invention

[0004] The present invention provides a display module and a method for manufacturing the display module to solve the problem that the optical adhesive layer may be offset during bonding, which may cause the polarizer to fail and lead to display anomalies.

[0005] In a first aspect, an embodiment of the present invention provides a display module, which includes:

[0006] A display panel;

[0007] A polarizer disposed on the display side of the display panel;

[0008] An optical adhesive layer disposed on the side of the polarizer facing away from the display panel; a first side edge of the optical adhesive layer extends beyond the corresponding side edge of the polarizer, and a plurality of first preset cutting lines are provided near the first side edge, and the orthographic projection of at least one of the first preset cutting lines on the plane where the polarizer is located falls on the polarizer and the distance to the corresponding side edge of the polarizer is less than a preset value.

[0009] Based on the above display module, optionally, the optical adhesive layer includes a second side edge opposite to the first side edge, the second side edge extends beyond the corresponding side edge of the polarizer corresponding to the second side edge, and a plurality of second preset cutting lines are provided near the second side edge, and the orthographic projection of at least one of the second preset cutting lines on the plane where the polarizer is located falls on the polarizer and the distance to the corresponding side edge of the polarizer is less than a preset value.

[0010] Based on the above display module, optionally, the distance between any two adjacent first preset cutting lines is less than or equal to the preset value, and the distance between any two adjacent second preset cutting lines is less than or equal to the preset value.

[0011] Based on the above display module, optionally, the distances between any adjacent first preset cutting lines are equal, and / or the distances between any adjacent second preset cutting lines are equal.

[0012] Preferably, the multiple first preset cutting lines are arranged at equal intervals, and / or the multiple second preset cutting lines are arranged at equal intervals.

[0013] Based on the above display module, optionally, the distances between any adjacent first preset cutting lines are equal, and the distances between any adjacent second preset cutting lines are equal, and the distance between two adjacent first preset cutting lines is equal to the distance between two adjacent second preset cutting lines.

[0014] Preferably, the multiple first preset cutting lines are arranged at equal intervals, the multiple second preset cutting lines are arranged at equal intervals, and the distance between two adjacent first preset cutting lines is equal to the distance between two adjacent second preset cutting lines.

[0015] Based on the above display module, optionally, multiple first preset cutting lines extend along a direction parallel to the first side edge and are spaced apart along a direction from the first side edge to the second side edge; multiple second preset cutting lines extend along a direction parallel to the second side edge and are spaced apart along a direction from the first side edge to the second side edge.

[0016] Based on the above display module, optionally, the preset value is less than or equal to 0.2 mm.

[0017] Based on the above display module, optionally, the number of the first preset cutting lines is equal to the number of the second preset cutting lines.

[0018] Based on the above display module, optionally, the first preset cutting lines include multiple through holes or blind holes.

[0019] In a second aspect, an embodiment of the present invention further provides a method for manufacturing a display module, which includes:

[0020] Providing a display panel and disposing a polarizer on the display side of the display panel;

[0021] Providing an optical adhesive layer and forming multiple first preset cutting lines at a position close to the first side edge of the optical adhesive layer;

[0022] Attach the optical adhesive layer to the side of the polarizer facing away from the display panel, such that after attachment, the first side edge extends beyond the corresponding side edge of the polarizer, and at least one of the plurality of first preset cutting lines has a positive projection on the plane of the polarizer that is located within the polarizer and is at a distance less than a preset value from the corresponding side edge of the polarizer; and,

[0023] Designate one of the first preset cutting lines as the first target cutting line, and remove the portion of the optical adhesive layer located outside the first target cutting line with the first target cutting line as the dividing line. The positive projection of the first target cutting line on the plane of the polarizer is located within the polarizer and is at a distance less than a preset value from the corresponding side edge of the polarizer.

[0024] Based on the above method for manufacturing the display module, optionally, the manufacturing method further includes:

[0025] Before attaching the optical adhesive layer to the side of the polarizer facing away from the display panel, form a plurality of second preset cutting lines at the second side edge close to the optical adhesive layer, where the second side edge is opposite to the first side edge;

[0026] During the process of attaching the optical adhesive layer to the side of the polarizer facing away from the display panel, also make the second side edge after attachment extend beyond the corresponding side edge of the polarizer, and at least one of the plurality of second preset cutting lines has a positive projection on the plane of the polarizer that is located within the polarizer and is at a distance less than a preset value from the corresponding side edge of the polarizer; and,

[0027] After attaching the optical adhesive layer to the side of the polarizer facing away from the display panel, designate one of the second preset cutting lines as the second target cutting line, and remove the portion of the optical adhesive layer located outside the second target cutting line with the second target cutting line as the dividing line. The positive projection of the second target cutting line on the plane of the polarizer is located within the polarizer and is at a distance less than a preset value from the corresponding side edge of the polarizer.

[0028] In the display module and the method for manufacturing the display module provided by the present invention, the display module includes a display panel, a polarizer disposed on the display side of the display panel, and an optical adhesive layer disposed on the side of the polarizer facing away from the display panel; a first side of the optical adhesive layer extends beyond a corresponding side of the polarizer, and a plurality of first preset cutting lines are provided near the first side of the optical adhesive layer. At least one of the first preset cutting lines has a positive projection on the plane of the polarizer that falls on the polarizer and is less than a preset value away from the corresponding side of the polarizer. Thus, by designing the optical adhesive layer whose first side extends beyond the corresponding side of the polarizer after bonding, and designing the first preset cutting lines near the first side of the optical adhesive layer, after bonding the optical adhesive layer, the part of the optical adhesive layer that extends beyond the polarizer can be selectively removed from one of the first preset cutting lines according to the offset of the bonding position, so that the distance from the newly formed first side of the optical adhesive layer to the corresponding side of the polarizer after removal is less than the preset value, thereby avoiding excessive exposure of this side of the polarizer outside the optical adhesive layer without affecting subsequent processes, and further avoiding display abnormalities caused by polarizer failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention. In addition, these drawings and the text description are not intended to limit the scope of the inventive concept in any way, but to illustrate the concepts of the present invention to those skilled in the art by reference to specific embodiments.

[0030] Figure 1 is a schematic structural diagram of an existing display module;

[0031] Figure 2 is a schematic structural diagram of another existing display module;

[0032] Figure 3 is a schematic cross-sectional structural diagram of a display module provided in an embodiment of the present invention;

[0033] Figure 4 is Figure 3 a schematic top view structural diagram of the shown display module;

[0034] Figure 5 is Figure 3 a schematic cross-sectional structural diagram of the shown display module after removing a part of the optical adhesive layer;

[0035] Figure 6 is a schematic cross-sectional structural diagram of a display module provided in another embodiment of the present invention;

[0036] Figure 7 is a schematic cross-sectional structural diagram of a display module provided in yet another embodiment of the present invention;

[0037] Figure 8 Schematic cross-sectional structure diagram of a display module provided in another embodiment of the present invention;

[0038] Figure 9 Schematic flow chart of a method for manufacturing a display module provided in an embodiment of the present invention.

[0039] Explanation of reference numerals:

[0040] 1 - Display panel; 2 - Polarizer; 3 - Optical adhesive layer; 31 - First side; 31′ - Newly formed first side; 31a - First preset cutting line; 32 - Second side; 32′ - Newly formed second side; 32a - Second preset cutting line; 4 - Cover plate. Detailed implementation manners

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0042] Overview of the Application

[0043] Refer to Figure 1 , Figure 1 For a schematic structure diagram of an existing display module. As Figure 1 shown, the display module includes a display panel (Panel) 1, a polarizer (Polarizer, POL) 2, an optical adhesive layer (Optical Clear Adhesive, OCA) 3, and a cover plate 4 that are stacked in sequence. The display panel 1 is used for light-emitting display. The polarizer 2 is mainly to block the reflection of ambient light entering the display panel from the outside and avoid the influence of ambient light on the display effect. The cover plate 4 mainly plays a protective role.

[0044] Among them, the optical adhesive layer 3 is attached to the polarizer 2 through a bonding device. And in an ideal situation, the center line of the optical adhesive layer 3 and the center line of the polarizer 2 are aligned. However, in reality, due to the limitation of the accuracy of the bonding device itself, it is difficult to ensure the above alignment. Instead, as Figure 2 shown, after bonding, the optical adhesive layer 3 will have a certain offset relative to the ideal situation ( Figure 2(The case of left offset is shown in the figure). After the offset occurs, one side of the polarizer 2 will have more parts exposed outside the protection of the optical adhesive layer 3. This exposed area may fail in the subsequent manufacturing process. For example, in the subsequent droplet test process, the corrosive liquid will remain on the part of the polarizer 2 exposed outside the optical adhesive layer 3. In the above ideal case, since the exposed part of the polarizer 2 is less, the remaining corrosive liquid is also less, so it will not cause the corrosion failure of the polarizer 2. However, in the case of the offset of the optical adhesive layer 3 during lamination, the exposed part on one side of the polarizer 2 will increase. In this case, more corrosive liquid will remain during the droplet test, resulting in the corrosion failure of the polarizer 2, which in turn affects the subsequent display effect.

[0045] To solve the above problems, one method is to improve the accuracy of the lamination equipment and reduce the offset amount during the lamination of the optical adhesive layer 3, thereby reducing the exposed area of the polarizer. However, the cost of using high-precision equipment will increase significantly, and the improvement of accuracy is not infinite.

[0046] Another method is to perform one-piece laser cutting on the display panel 1, the polarizer 2, and the optical adhesive layer 3 after laminating the optical adhesive layer 3. After cutting, the cross-sections of the polarizer 2 and the optical adhesive layer 3 are flush, that is, the polarizer 2 has no exposed part, so the above failure problems can be avoided. However, the display panel 1 and the polarizer 2 are very sensitive to the high temperature of the laser, so other reliability problems such as severe carbonization at the cutting position are likely to occur.

[0047] In view of this, the present invention provides a solution. By changing the structure and process of the optical adhesive layer, when laminating the optical adhesive layer, it is possible to avoid excessive exposure of the polarizer relative to the optical adhesive layer, without the need to improve the accuracy of the lamination equipment, and at the same time avoid other reliability problems. The following provides a non-limiting description of the specific implementation solutions through several examples or embodiments.

[0048] Exemplary Display Module

[0049] Referring to Figure 3 and Figure 4 , Figure 3 is a schematic cross-sectional structure diagram of a display module provided in an embodiment of the present invention, Figure 4 is Figure 3 a schematic top view structure diagram of the display module shown. As Figure 3 and Figure 4 shown, the display module of this embodiment includes: a display panel 1, a polarizer 2 disposed on the display side of the display panel 1, and an optical adhesive layer 3 disposed on the side of the polarizer 2 facing away from the display panel 1.

[0050] The optical adhesive layer 3 includes opposite first and second side edges 31 and 32, and both the first side edge 31 and the second side edge 32 of the optical adhesive layer 3 extend beyond the corresponding side edges of the polarizer 2; multiple ( Figure 3 two are shown in) first preset cutting lines 31a are provided near the first side edge 31 of the optical adhesive layer 3, and multiple ( Figure 3 two are shown in) second preset cutting lines 32a are provided near the second side edge 32 of the optical adhesive layer 3.

[0051] Among them, among the multiple first preset cutting lines 31a, at least one first preset cutting line 31a has a positive projection on the plane where the polarizer 2 is located that falls on the polarizer 2 and the distance to the corresponding side edge of the polarizer 2 is less than a preset value.

[0052] Among the multiple second preset cutting lines 32a, at least one second preset cutting line 32a has a positive projection on the plane where the polarizer 2 is located that is located on the polarizer 2 and the distance to the corresponding side edge of the polarizer 2 is less than a preset value.

[0053] Wherein the first preset cutting line 31a and the second preset cutting line 32a are preset cutting trajectories or preset cutting paths (that is, in the cutting or cutting process, the cutting tool moves along the first preset cutting line 31a or the second preset cutting line 32a for cutting). The first preset cutting line 31a and the second preset cutting line 32a can be used to remove the part of the optical adhesive layer 3 that extends beyond the corresponding side edges of the polarizer 2, so that the distances from the newly formed first side edge 31' and the newly formed second side edge 32' of the optical adhesive layer 3 after removal to the corresponding side edges of the polarizer 2 are both less than a preset value.

[0054] Figure 5 Schematically shows a schematic diagram of partially removing the optical adhesive layer 3 along the first preset cutting line 31a and the second preset cutting line 32a so that the optical adhesive layer 3 after removal obtains the newly formed first side edge 31' and the newly formed second side edge 32'. Among them, the more the number of the first preset cutting line 31a and the second preset cutting line 32a whose positive projections on the plane where the polarizer 2 is located fall on the polarizer 2, the more choices there are during actual removal. Taking the left side as an example, when less part of the left side of the polarizer 2 needs to be exposed, the part of the optical adhesive layer 3 that extends beyond the polarizer 2 can be removed from the first preset cutting line 31a relatively close to the left side edge of the polarizer 2. Similarly, when more part of the left side of the polarizer 2 needs to be exposed, the part of the optical adhesive layer 3 that extends beyond the polarizer 2 can be removed from the first preset cutting line 31a relatively far from the left side edge of the polarizer 2.

[0055] First of all, it should be noted that unless otherwise specified, in each embodiment of the present invention, multiple means at least two, that is, two or more. Similarly, several means at least two, that is, two or more.

[0056] Secondly, for the first side 31 and the second side 32 of the optical adhesive layer 3, the corresponding side of the polarizer 2 refers to the side of the polarizer 2 that is on the same side as the first side 31 or the second side 32. Taking Figure 3 as an example, the first side 31 is located on the left side of the polarizer 2. Therefore, the corresponding side of the first side 31 is the left side of the polarizer 2. Correspondingly, the corresponding side of the second side 32 is the right side of the polarizer 2.

[0057] In addition, making the distances from the newly formed first side 31' and the newly formed second side 32' of the optical adhesive layer 3 after removal to the corresponding sides of the polarizer 2 both less than a preset value means making the widths of the exposed parts of the two sides of the polarizer 2 relative to the newly formed first side 31' and the newly formed second side 32' of the optical adhesive layer 3 after removal not greater than the preset value. The function is to avoid excessive exposure of the polarizer 2.

[0058] Among them, the above-mentioned preset value is set according to actual needs. For example, in order to avoid the corrosion and failure of the polarizer 2 during the liquid dripping test, generally, it is necessary to ensure that the exposed part of the polarizer 2 is not greater than 0.2 mm (millimeter). Therefore, the above-mentioned preset value can be set to 0.2 mm, or less than 0.2 mm. Similarly, when considering other situations, the above-mentioned preset value can also be adjusted according to corresponding factors.

[0059] Through the above design, the optical adhesive layer 3 can be continuously attached to the polarizer 2 using the original attaching equipment, and then, according to the actual attaching offset situation, selectively remove the part of the optical adhesive layer 3 that exceeds the polarizer 2 from one of the first preset cutting lines 31a and one of the second preset cutting lines 32a, so that the optical adhesive layer 3 after removal will neither affect the subsequent manufacturing process (mainly to avoid the part of the optical adhesive layer 3 that exceeds the polarizer 2 from affecting the subsequent overall machine assembly), nor cause excessive exposure of the polarizer 2, thereby avoiding possible failure problems of the polarizer 2.

[0060] In some embodiments, the first preset cutting line 31a and the second preset cutting line 32a can be formed by further processing after the optical adhesive layer 3 with a suitable shape is prepared. For example, a plurality of through holes or blind holes arranged in a line can be formed on the optical adhesive layer 3 using a specific cutting device to obtain the first preset cutting line 31a and the second preset cutting line 32a. That is, the first preset cutting line 31a and the second preset cutting line 32a can include a plurality of through holes or blind holes. The shapes of the through holes or blind holes can be designed according to actual needs, and are not specifically limited.

[0061] In addition, to facilitate the implementation of the above object, in some embodiments, multiple first preset cutting lines 31a extend along a direction parallel to the first side 31 and are arranged at intervals along a direction from the center of the optical adhesive layer 3 to the edge (or, from the first side 31 to the second side 32); and, multiple second preset cutting lines 32a extend along a direction parallel to the second side 32 and are arranged at intervals along a direction from the center of the optical adhesive layer 3 to the edge (or, from the first side 31 to the second side 32). In this way, an optical adhesive layer 3 with a regular shape can be formed, and it is convenient to form multiple mutually parallel first preset cutting lines 31a and multiple mutually parallel second preset cutting lines 32a on the optical adhesive layer 3.

[0062] However, it can be understood that the arrangement manner of the first preset cutting lines 31a and the second preset cutting lines 32a is not limited thereto. In some other embodiments, multiple first preset cutting lines 31a may not be parallel to each other. Similarly, multiple second preset cutting lines 32a may not be parallel to each other, as long as it can be ensured that after removing a part of the optical adhesive layer 3 from one of the first preset cutting lines 31a and one of the second preset cutting lines 32a, the exposed part of the polarizer 2 is not greater than a preset value.

[0063] In addition, in some embodiments, the distance between any two adjacent first preset cutting lines 31a is less than or equal to the above preset value, and the distance between any two adjacent second preset cutting lines 32a is less than or equal to the above preset value. With such a setting, no matter whether the attached optical adhesive layer 3 shifts to the left or to the right, after selectively removing a part of the optical adhesive layer 3, the requirement that the polarizer 2 is not overly exposed can be satisfied.

[0064] In some embodiments, the distance between any two adjacent first preset cutting lines 31a is equal and less than or equal to the above preset value, and / or, the distance between any two adjacent second preset cutting lines 32a is equal and less than or equal to the above preset value. For example, the distance between each first preset cutting line 31a can be set as a1, and the distance between each second preset cutting line 32a can be set as a2. In this way, it is convenient to form cutting lines on the optical adhesive layer 3. At the same time, when actually removing the part of the optical adhesive layer 3 that exceeds the polarizer 2 based on the cutting lines, it is also easier to determine the corresponding removal position. On this basis, further preferably, the distance a1 between any two adjacent first preset cutting lines 31a is equal to the distance a2 between any two adjacent second preset cutting lines 32a. In this way, it can be further convenient for the design, formation, and application of the first preset cutting lines 31a and the second preset cutting lines 32a.

[0065] To make the above solution easier to understand, it will be further described in combination with the accompanying drawings and several specific embodiments.

[0066] First, assume that the width of the exposed part of the polarizer 2 is not greater than b, then the preset value described in the above embodiment can be set to b; at the same time, assume that the maximum offset that may occur due to the accuracy limitation of the device itself is x max ; in addition, assume that the spacing between adjacent first preset cutting lines 31a and the spacing between adjacent second preset cutting lines 32a are both a, and a ≤ b.

[0067] Based on the above assumptions, as Figure 3 and Figure 4 shown, in this embodiment, the number of the first preset cutting lines 31a is two, that is, the cutting lines l1 and l2 respectively, and the cutting line l1 is closer to the first side 31 than the cutting line l2; correspondingly, the number of the second preset cutting lines 32a is also two, that is, the cutting lines l3 and l4 respectively, and the cutting line l3 is farther from the second side 32 than the cutting line l4. Further, in some embodiments, when the offset of the optical adhesive layer 3 to the left relative to the ideal position is x, the left part and the right part of the optical adhesive layer 3 can be removed from the cutting lines l2 and l4 respectively, to obtain the structure shown in Figure 5 shown. At this time, the width b1 of the exposed part on the left side of the polarizer 2 is a - x, and the width b2 of the exposed part on the right side of the polarizer 2 is x. Since there are requirements for the device accuracy in actual application, it is necessary to satisfy x ≤ x max ≤ b, so it can be obtained that b1 ≤ b and b2 ≤ b. That is, the requirement that the width of the exposed part of the polarizer 2 is not greater than b is satisfied.

[0068] Referring to Figure 6 , in some embodiments, when the optical adhesive layer 3 does not shift relative to the ideal position, the left part and the right part of the optical adhesive layer 3 can be removed from the cutting lines l2 and l3 respectively. At this time, the width b1 of the exposed part on the left side of the polarizer 2 is a ≤ b, and the width b2 of the exposed part on the right side of the polarizer 2 is a ≤ b. That is, the requirement that the width of the exposed part of the polarizer 2 is not greater than b is satisfied.

[0069] In addition, referring to Figure 7 , when the offset of the optical adhesive layer 3 to the right relative to the ideal position is x, similar to the case of shifting to the left, at this time, the left part and the right part of the optical adhesive layer 3 can be removed from the cutting lines l1 and l3 respectively. At this time, the width b1 of the exposed part on the left side of the polarizer 2 is x, and the width b2 of the exposed part on the right side of the polarizer 2 is a - x. Therefore, b1 ≤ b and b2 ≤ b can be satisfied. That is, the requirement that the width of the exposed part of the polarizer 2 is not greater than b is satisfied.

[0070] It should be noted that although Figures 3 - 7In this case, the number of the first preset cutting lines 31a and the number of the second preset cutting lines 32a are equal. However, it can be understood that when the number of the first preset cutting lines 31a and the number of the second preset cutting lines 32a are not equal, the purposes of the above embodiments can also be achieved. The case where the number of the first preset cutting lines 31a and the number of the second preset cutting lines 32a are equal can be taken as a preference, which is equivalent to a symmetric design of the optical adhesive layer 3 and the cutting lines thereon, facilitating the formation of cutting lines on the optical adhesive layer 3 and facilitating practical applications.

[0071] In addition, Figures 3 - 7 The case where both the first preset cutting lines 31a and the second preset cutting lines 32a are two is shown. In some other embodiments, the spacing a1 between the first preset cutting lines 31a and the spacing a2 between the second preset cutting lines 32a (a1 can be equal to a2) can be considered to be reduced, so as to increase the number of the first preset cutting lines 31a and the second preset cutting lines 32a. Refer to Figure 8 As shown, the smaller the spacing a1 between the first preset cutting lines 31a and the spacing a2 between the second preset cutting lines 32a are, the more convenient it is to make the widths b1 and b2 of the exposed parts at both ends of the polarizer 2 closer after removing a part of the optical adhesive layer 3. However, in practical applications, the process capabilities of the cutting equipment and the removing equipment need to be considered, and the spacings a1 and a2 cannot be reduced without limit.

[0072] In addition, it should be noted that in the above embodiments, the description is made by taking the example that both the first side 31 and the second side 32 are provided with cutting lines. However, it can be understood that in some other embodiments, only the first preset cutting lines 31a can be designed on the first side 31 or only the second preset cutting lines 32a can be designed on the second side 32. At this time, when the optical adhesive layer 3 is attached by using the attaching equipment, relative to the ideal situation, the optical adhesive layer 3 can be appropriately offset in the direction of the side without cutting lines (it is necessary to ensure that this side does not exceed the corresponding side of the polarizer 2). In this way, the widths of the exposed parts at both ends of the polarizer 2 can also be made not greater than the preset value. In addition to the first side 31 and the second side 32, in some other embodiments, it can also be considered to design the third preset cutting lines at the third side (taking Figure 3 as an example, that is, the upper side) adjacent to the first side 31 and the second side 32, so that the width of the exposed part on this side of the polarizer will not be too large.

[0073] In addition, in the above embodiments, the first side 31 and the second side 32 are respectively corresponding to the left side and the right side of the display module for illustration. It can be understood that in some other embodiments, the first side 31 can also correspond to the upper side of the display module. Similarly, the second side 32 can correspond to the lower side of the display module. And in practice, the lower side of the display module generally corresponds to the bending area of the display panel. In this case, the polarizer 2 on this side generally does not face the problem of excessive exposure and resulting in failure. Therefore, in this case, it can be considered not to design a cutting line at this side of the optical adhesive layer, thereby reducing the process.

[0074] In addition, it should be noted that in addition to the structures mentioned in the above embodiments, the display module also includes other structures necessary to implement its functions, but the present invention may not make improvements thereto, so no further description will be given one by one.

[0075] Exemplary Preparation Method

[0076] An embodiment of the present invention also provides a method for manufacturing a display module, as Figure 9 shown, the manufacturing method includes the following steps:

[0077] Step S101: Provide a display panel and set a polarizer on the display side of the display panel.

[0078] Among them, the display panel can be a flexible display panel.

[0079] Step S102: Provide an optical adhesive layer and form a plurality of first preset cutting lines at the first side close to the optical adhesive layer;

[0080] Specifically, the optical adhesive layer with the required shape and size can be prepared first, and the first preset cutting lines are formed near the first side of the optical adhesive layer by a cutting device.

[0081] Step S103: Bond the optical adhesive layer to the side of the polarizer facing away from the display panel, so that the first side after bonding extends beyond the corresponding side of the polarizer, and at least one of the plurality of first preset cutting lines is located within the polarizer in the orthographic projection on the plane of the polarizer and the distance to the corresponding side of the polarizer is less than a preset value.

[0082] Specifically, an optical adhesive layer including a first preset cutting line can be attached to the side of the polarizer facing away from the display panel by using an attaching device. Before attachment, the attachment position can be determined in advance according to factors such as the sizes of the polarizer and the optical adhesive layer, as well as the number and spacing of the first preset cutting lines, so as to ensure that the first side after attachment extends beyond the corresponding side of the polarizer. At least one of the multiple first preset cutting lines has a positive projection on the plane where the polarizer is located within the polarizer and is at a distance less than a preset value from the corresponding side of the polarizer. During attachment, relative to the ideal situation, the optical adhesive layer can be appropriately offset in the direction of the second side opposite to the first side (it is necessary to ensure that the second side does not extend beyond the corresponding side of the polarizer), so as to ensure that the exposed parts of the two sides of the polarizer are not greater than the preset value when subsequent steps are carried out.

[0083] Among them, the structure and parameters of the first preset cutting line can refer to the description in the "Exemplary Display Module" section and will not be elaborated here.

[0084] Step S104: Take one of the first preset cutting lines as the first target cutting line, and remove the part of the optical adhesive layer located outside the first target cutting line with the first target cutting line as the boundary. The positive projection of the first target cutting line on the plane where the polarizer is located is within the polarizer and is at a distance less than a preset value from the corresponding side of the polarizer.

[0085] Specifically, after attaching the optical adhesive layer, since the first side of the optical adhesive layer extends beyond the corresponding side of the polarizer, it may affect the subsequent process. Therefore, a part of the optical adhesive layer needs to be removed from one of the first preset cutting lines. When removing, one can be selected from the multiple first preset cutting lines as the first target cutting line according to the relative positions of the multiple first preset cutting lines and the sides of the polarizer. Then, with the first target cutting line as the boundary, the excess optical adhesive layer on this side (that is, the part located away from the center of the first target cutting line) is removed from the main body. The removal process can be realized by an automated device or manually, and can be designed according to actual needs.

[0086] After removing a part of the optical adhesive layer, subsequent processes can be continued, such as bonding the cover plate to the optical adhesive layer.

[0087] In the above method, by designing an optical adhesive layer with the first side extending beyond the corresponding side of the polarizer after attachment, and designing a first preset cutting line near the first side of the optical adhesive layer, after attaching the optical adhesive layer, the part of the optical adhesive layer that extends beyond the polarizer can be selectively removed from one of the first preset cutting lines according to the offset situation of the attachment position, so that the distance from the newly formed first side of the optical adhesive layer to the corresponding side of the polarizer after removal is less than the preset value, thereby avoiding excessive exposure of the polarizer on this side outside the optical adhesive layer without affecting the subsequent process, and further avoiding display abnormalities caused by polarizer failure.

[0088] It can be understood that, for the convenience of actual lamination, as described in the foregoing embodiments, a second preset cutting line may be designed on the second side of the optical adhesive layer opposite to the first side, and the position and structure of the second cutting line are as described in the foregoing embodiments. Based on this, in some embodiments, the above preparation method may further include: before laminating the optical adhesive layer on the side of the polarizer facing away from the display panel, forming a plurality of second preset cutting lines near the second side of the optical adhesive layer, where the second side is opposite to the first side;

[0089] During the process of laminating the optical adhesive layer on the side of the polarizer facing away from the display panel, it is also ensured that the second side after lamination extends beyond the corresponding side of the polarizer, and at least one of the plurality of second preset cutting lines is located within the polarizer in the orthographic projection on the plane of the polarizer and the distance to the corresponding side of the polarizer is less than a preset value; and,

[0090] After laminating the optical adhesive layer on the side of the polarizer facing away from the display panel, taking one of the second preset cutting lines as the second target cutting line, and removing the part of the optical adhesive layer located outside the second target cutting line with the second target cutting line as the boundary line, the orthographic projection of the second target cutting line on the plane of the polarizer is located within the polarizer and the distance to the corresponding side of the polarizer is less than a preset value.

[0091] In this way, there is no longer a requirement for the offset direction during actual lamination, which is more convenient for actual lamination. Among them, the method and process of forming the second preset cutting line, the method and process of selecting the second target cutting line from the plurality of second preset cutting lines, and the method and process of removing the part of the optical adhesive layer located outside the second target cutting line with the second target cutting line as the boundary line can refer to the corresponding content of the first preset cutting line, which will not be elaborated here.

[0092] For example, continuing with the embodiments shown in Figure 3 and Figure 4 as an example, when the optical adhesive layer shifts to the left after actual lamination, the cutting line l2 can be selected as the first target cutting line, and the cutting line l4 can be selected as the second target cutting line. Then, taking the cutting line l2 and the cutting line l4 as two boundary lines respectively, and removing the part of the optical adhesive layer located on the left side of the cutting line l2, and removing the part of the optical adhesive layer located on the right side of the cutting line l4, finally making the structure of the optical adhesive layer meet the requirements of subsequent processes and not causing excessive exposure of the polarizer and resulting in failure.

[0093] Exemplary embodiments are described herein with reference to plan views that are idealized exemplary drawings. In the drawings, the sizes of regions are exaggerated for clarity. Thus, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Accordingly, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations resulting from, for example, manufacturing. For example, an etched region shown as rectangular will generally have curved features. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to depict the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0094] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present invention shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second", and similar terms used in the embodiments of the present invention do not denote any order, quantity, or importance, but are merely used to avoid confusion of components.

[0095] Unless the context otherwise requires, throughout the specification, the term "comprising" is to be construed in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples", etc. are intended to indicate that a particular feature, structure, material, or characteristic related to the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms are not necessarily directed to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner.

Claims

1. A display module, characterized in that, Comprising: A display panel; A polarizer disposed on the display side of the display panel; An optical adhesive layer disposed on the side of the polarizer facing away from the display panel; a first side of the optical adhesive layer extends beyond a corresponding side of the polarizer, and a plurality of first preset cutting lines are provided near the first side, and a positive projection of at least one of the first preset cutting lines on the plane where the polarizer is located falls on the polarizer and the distance to the corresponding side of the polarizer is less than a preset value; The optical adhesive layer further includes a second side opposite to the first side, the second side extends beyond the side of the polarizer corresponding to the second side, and a plurality of second preset cutting lines are provided near the second side, and a positive projection of at least one of the second preset cutting lines on the plane where the polarizer is located falls on the polarizer and the distance to the corresponding side of the polarizer is less than a preset value.

2. The display module according to claim 1, wherein The distance between any two adjacent first preset cutting lines is less than or equal to the preset value, and the distance between any two adjacent second preset cutting lines is less than or equal to the preset value.

3. The display module according to claim 1 or 2, characterized in that, The distance between any two adjacent first preset cutting lines is equal, and / or the distance between any two adjacent second preset cutting lines is equal.

4. The display module according to claim 3, characterized in that, The distance between any two adjacent first preset cutting lines is equal, and the distance between any two adjacent second preset cutting lines is equal; And, the distance between any two adjacent first preset cutting lines is equal to the distance between any two adjacent second preset cutting lines.

5. The display module according to claim 1, characterized in that, The plurality of first preset cutting lines extend in a direction parallel to the first side and are arranged at intervals in a direction from the first side to the second side; the plurality of second preset cutting lines extend in a direction parallel to the second side and are arranged at intervals in a direction from the first side to the second side.

6. The display module according to claim 1, wherein The preset value is less than or equal to 0.2 mm.

7. The display module according to claim 1, wherein The first preset cutting line includes a plurality of through holes or blind holes.

8. A method for preparing a display module, characterized in that, Comprising: Providing a display panel and disposing a polarizer on the display side of the display panel; Providing an optical adhesive layer and forming a plurality of first preset cutting lines near a first side of the optical adhesive layer; Bonding the optical adhesive layer to the side of the polarizer facing away from the display panel so that the first side after bonding extends beyond the corresponding side of the polarizer, and a positive projection of at least one of the plurality of first preset cutting lines on the plane where the polarizer is located is located within the polarizer and the distance to the corresponding side of the polarizer is less than a preset value; and, Selecting one of the first preset cutting lines as a first target cutting line and removing a portion of the optical adhesive layer located outside the first target cutting line with the first target cutting line as a boundary, the positive projection of the first target cutting line on the plane where the polarizer is located is located within the polarizer and the distance to the corresponding side of the polarizer is less than a preset value; Before laminating the optical adhesive layer on the side of the polarizer facing away from the display panel, a plurality of second preset cutting lines are formed near the second side of the optical adhesive layer, and the second side is opposite to the first side; During the process of laminating the optical adhesive layer on the side of the polarizer facing away from the display panel, the second side after lamination is also made to extend beyond the corresponding side of the polarizer, and the positive projection of at least one of the plurality of second preset cutting lines on the plane of the polarizer is located within the polarizer and the distance to the corresponding side of the polarizer is less than a preset value; and, After laminating the optical adhesive layer on the side of the polarizer facing away from the display panel, select one of the second preset cutting lines as the second target cutting line and remove the part of the optical adhesive layer located outside the second target cutting line with the second target cutting line as the demarcation line. The positive projection of the second target cutting line on the plane of the polarizer is located within the polarizer and the distance to the corresponding side of the polarizer is less than a preset value.

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