Optical film assembly, display module and method for manufacturing display module

Abstract

The application relates to an optical film assembly, a display module and a display module manufacturing method. The optical film assembly comprises an optical adjusting film and a protective film. The protective film is arranged on one side surface of the optical adjusting film. An identification area is arranged on the protective film. The orthographic projection of at least one edge line of the identification area on the optical adjusting film coincides with the corresponding edge line of the optical adjusting film. The identification area can present an optical image different from that of the optical adjusting film. The optical film assembly can improve the accuracy of the optical detection result of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to an optical film assembly, a display module, and a method for manufacturing a display module. Background Technology

[0002] OLED (Organic Light Emitting Diode) display panels have driven research into foldable and bendable display panels due to their thinness and flexibility. Foldable OLED display panels consist of multiple stacked film layers. During the stacking process, the relative positions of some of the film layers need to be optically detected to improve the alignment accuracy of the stacking process.

[0003] However, inaccurate position recognition often occurs during optical inspection, resulting in poor accuracy of the optical inspection results. Summary of the Invention

[0004] Therefore, it is necessary to provide an optical film assembly, a display module, and a method for manufacturing the display module to address the issue of poor accuracy in optical testing results of foldable OLED display panels.

[0005] The optical film assembly provided in this application includes an optical adjustment film and a protective film, wherein the protective film is disposed on one side surface of the optical adjustment film. The protective film has a recognition area, and at least one edge of the recognition area projects onto the optical adjustment film in a projection that coincides with the corresponding edge of the optical adjustment film. Furthermore, the recognition area is capable of displaying an optical image different from that of the optical adjustment film.

[0006] The optical film assembly provided in this application, by setting a protective film on one side of an optical adjustment film, and setting a recognition area on the protective film, allows at least one edge of the recognition area to project onto the optical adjustment film in a way that coincides with the corresponding edge of the optical adjustment film. Furthermore, the recognition area can present an optical image different from that of the optical adjustment film, enabling the edge of the recognition area to more clearly indicate the edge position of the optical adjustment film. Thus, during optical detection and recognition, the influence of the optical performance of the optical adjustment film itself and the influence of other external film layers can be eliminated, and the position of the optical adjustment film can be identified by the location of the recognition area, thereby improving the accuracy of optical detection and recognition. Attached Figure Description

[0007] Figure 1 A schematic diagram of the structure of an optical film assembly in one embodiment of this application is shown;

[0008] Figure 2 A schematic diagram of the structure of an optical film assembly in another embodiment of this application is shown;

[0009] Figure 3A schematic diagram of the structure of a display module in one embodiment of this application is shown;

[0010] Figure 4 and Figure 5 The diagrams show the unfolded state and the bent-folded state of the flexible display panel in one embodiment of this application, respectively.

[0011] Figure 6 and Figure 7 Schematic diagrams of the optical film assembly in two different embodiments of this application are shown respectively;

[0012] Figure 8 A schematic diagram of the structure of a display panel according to an embodiment of this application is shown.

[0013] Explanation of icon numbers:

[0014] 1. Display module;

[0015] 10. Display panel; 10a. Bending area; 10b. Non-bending area; 11. Array substrate; 12. Pixel definition layer; 13. Light-emitting device; 131. Anode layer; 132. Organic functional layer; 133. Cathode layer; 14. Encapsulation layer; 15. Color filter; 16. Black matrix; 17. Touch layer;

[0016] 20. Buffer layer; 20a. Gap;

[0017] 30. Optical film assembly;

[0018] 31. Optical adjustment film; 311. Polarizing film; 312. Transparent support layer; 313. Optical adhesive layer;

[0019] 32. Protective film; 32a. Identification area; 321. Protective layer; 322. Identification layer; 3221. Reflective polarizer; 3222. Color filter; 323. Thickness compensation layer;

[0020] 33. Release film;

[0021] 40. Back panel;

[0022] 50. Supporting substrate;

[0023] 60. Connecting layer. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] Compared to LCD (Liquid Crystal Display) panels, OLED (Organic Light Emitting Diode) display panels, with their advantages of being thinner, lighter, brighter, lower power consumption, faster response, higher resolution, greater flexibility, and higher luminous efficiency, meet consumers' evolving demands for display technology and have gradually become a research hotspot for major manufacturers. In particular, the thinness and flexibility of OLED display panels have driven research into foldable and bendable display panels.

[0031] Because the stress conditions in the bending area of ​​foldable OLED products differ from other areas, foldable OLED products typically incorporate a BPL (Bend Protection Layer) in the bending area to protect it. Simultaneously, to reduce reflectivity to ambient light, an optical conditioning film is usually placed on the light-emitting side of the display panel. In one related technology, a POL (Polarizer) is used on the light-emitting side of the display panel to reduce reflectivity to ambient light. In another related technology, CFOT (Color Filter On Touch, depolarization technology) is used on the light-emitting side of the display panel, replacing the POL with a color filter to filter light.

[0032] During the BPL coating process, the optical adjustment film is typically used as a reference, and the BPL is coated on the light-emitting side surface of the display panel along the boundary line of the optical adjustment film. Furthermore, because there is slippage between different film layers during the bending process of foldable OLED products, a certain gap is usually left between the BPL and the optical adjustment film during BPL coating, for example, a gap with a width of 0.15mm, to provide sufficient slippage space.

[0033] Currently, AOI (Automated Optical Inspection) technology is commonly used to inspect and identify the optical adjustment film and BPL during the BPL coating process. However, due to the influence of the properties of the film layers and optical adjustment film within the display panel, the accuracy of AOI identification is not good, making it difficult to control the gap size.

[0034] Specifically, in foldable products that use POL, if they are equipped with BPDL (black pixel definition layer) design, since both the grooves of BPDL and POL are black, it is difficult to distinguish BPDL and POL under the AOI microscopic inspection view, making it difficult for AOI to accurately identify them.

[0035] In depolarization techniques, POL is replaced by OCA (Optically Clear Adhesive) and PET (Polyethylene terephthalate). Depolarization is typically implemented in conjunction with BPDL (Brightness-Based Lithography) solutions. Since OCA and PET are transparent structures, the boundary between them is difficult to discern under the influence of black grooves. Therefore, AOI microscopy of folded products using depolarization techniques also presents challenges in identification.

[0036] Based on this, related technologies use manual OM (Optical Microscope) microscopy to replace AOI microscopy. While this method can improve the accuracy of identification to some extent, it also greatly reduces work efficiency.

[0037] Therefore, the inventors of this application considered inkjet printing on the optical adjustment film to make the edges of the optical adjustment film easier to identify. However, due to the limitations of current technology, the accuracy of inkjet printing is low, and there may be an error of about 1 mm. This error is very likely to be larger than the gap size reserved between the BPL and the optical adjustment film, so it is difficult to effectively solve the above problems.

[0038] To address the aforementioned problems, this application provides an optical film assembly. A protective film is disposed on one side of an optical adjustment film, and a recognition area is formed on the protective film. At least one edge of the recognition area projects onto the optical adjustment film with the corresponding edge of the optical adjustment film. Furthermore, the recognition area can present an optical image different from that of the optical adjustment film under the optical lens, allowing the edge of the recognition area to more clearly indicate the edge position of the optical adjustment film. Thus, during optical detection and recognition, the influence of the optical performance of the optical adjustment film itself and other external film layers can be eliminated. The position of the optical adjustment film can be identified by the location of the recognition area, thereby improving the accuracy of optical detection and recognition.

[0039] See Figure 1An embodiment of this application provides an optical film assembly 30, which includes an optical adjustment film 31 and a protective film 32. The protective film 32 is disposed on one side surface of the optical adjustment film 31. The material of the protective film 32 may be PET (Polyethylene terephthalate). The protective film 32 may cover all or part of the optical adjustment film 31 to protect the optical adjustment film 31 as needed.

[0040] Furthermore, the protective film 32 is provided with a recognition area 32a. The orthographic projection of at least one edge of the recognition area 32a onto the optical adjustment film 31 coincides with the corresponding edge of the optical adjustment film 31, and the recognition area 32a can present an optical image different from that of the optical adjustment film 31. The shape of the recognition area 32a can be a regular shape such as a rectangle, or it can be an irregular shape.

[0041] Understandably, when the orthographic projection of one edge of the recognition area 32a onto the optical adjustment film 31 coincides with the corresponding edge of the optical adjustment film 31, the position of the corresponding edge of the optical adjustment film 31 can be determined based on the position of that edge of the recognition area 32a. Furthermore, the recognition area 32a can present an optical image different from that of the optical adjustment film 31, allowing the position of the edge of the recognition area 32a to more clearly indicate the position of the edge of the optical adjustment film 31. Thus, during optical detection and recognition, the influence of the optical performance of the optical adjustment film 31 itself and the influence of other external films can be eliminated, and the position of the optical adjustment film 31 can be identified by the position of the recognition area 32a, thereby improving the accuracy of optical detection and recognition.

[0042] In some embodiments, the protective film 32 includes a protective layer 321 and an identification layer 322 stacked together, wherein the orthographic projection of the identification layer 322 onto the optical adjustment film 31 partially or completely overlaps with the orthographic projection of the protective layer 321 onto the optical adjustment film 31. The area where the orthographic projection of the identification layer 322 onto the protective layer 321 is located is the identification area 32a, and the identification layer 322 can present an optical image different from that of the optical adjustment film 31.

[0043] Based on this, when the orthographic projection of the identification layer 322 on the optical adjustment film 31 completely overlaps with the orthographic projection of the protective layer 321 on the optical adjustment film 31, the range of the identification area 32a is maximized, making the optical image of the identification area 32a easier to identify; when the orthographic projection of the identification layer 322 on the optical adjustment film 31 partially overlaps with the orthographic projection of the protective layer 321 on the optical adjustment film 31, the identification requirements are met while the material required for the identification layer 322 is reduced, thereby reducing production costs.

[0044] Optionally, the protective layer 321 is bonded to the optical adjustment film 31. Specifically, the protective layer 321 and the optical adjustment film 31 can be bonded together by an adhesive layer or attracted to each other by electrostatic adsorption. Further, an identification layer 322 is disposed on the surface of the protective layer 321 facing away from the optical adjustment film 31. Thus, on the one hand, the placement of the identification layer 322 does not affect the bonding between the protective layer 321 and the optical adjustment film 31, thereby ensuring the protective effect of the protective layer 321 on the optical adjustment film 31; on the other hand, the identification layer 322 is not obstructed by the protective layer 321, allowing for a clearer optical image and improving the accuracy of optical recognition.

[0045] Optionally, the protective layer 321 is made of polyethylene terephthalate. Polyethylene terephthalate has good mechanical properties and high transparency, thus providing good protection and facilitating observation of the adhesion between the protective layer 321 and the optical adjustment film 31.

[0046] In some embodiments, the reflectivity of the marker layer 322 is higher than that of the optical adjustment film 31; for example, the marker layer 322 includes a high-reflectivity film. Optionally, the marker layer 322 includes a reflecting polarizer mirror 3221 (RPM). Thus, the position of the marker layer 322 can be clearly displayed in the optical image, and the optical detection device can accurately capture the edge of the mirror-like marker layer 322, thereby improving the accuracy of the optical recognition results.

[0047] In some embodiments, the color of the identification layer 322 is different from the color of the optical adjustment film 31. For example, the optical adjustment film 31 is black, or the optical adjustment film 31 is a transparent film, and the identification layer 322 is colored, such as red, green, or blue. In this way, the location of the identification layer 322 can be clearly shown in the optical image.

[0048] See Figure 2 For example, the identifier layer 322 includes a color filter 3222. Based on this, on the one hand, the high-brightness color filter 3222 can improve the clarity of the identifier layer 322 in the optical image; on the other hand, when the optical film assembly 30 is applied to the display module 1 equipped with the black pixel definition layer 12, since the manufacturing process of the display module 1 usually requires the use of the color filter 3222, the material for the identifier layer 322 is more convenient to obtain.

[0049] It is understandable that when the orthographic projection of the marking layer 322 on the optical adjustment film 31 partially overlaps with the orthographic projection of the protective layer 321 on the optical adjustment film 31, a portion of the protective layer 321 is not covered by the marking layer 322. In this case, the surface of the protective film 32 facing away from the optical adjustment film 31 is a non-planar surface with steps.

[0050] Based on this, the present application further provides that the protective film 32 also includes a thickness compensation layer 323 stacked with the protective layer 321. The thickness compensation layer 323 and the marking layer 322 are disposed on the same side of the protective layer 321, and the surface of the thickness compensation layer 323 facing away from the protective layer 321 is flush with the surface of the marking layer 322 facing away from the protective layer 321, so that the surface of the protective film 32 facing away from the optical adjustment film 31 forms a plane, thereby preventing step difference from causing marks on other film layers.

[0051] Optionally, the thickness compensation layer 323 may be made of the same material as the protective layer 321. For example, when the protective layer 321 is made of polyethylene terephthalate, the thickness compensation layer 323 may also be made of polyethylene terephthalate. This improves the ease of sourcing materials for the thickness compensation layer 323.

[0052] In some embodiments, a protective film 32 is disposed on one side surface of the optical adjustment film 31, and the protective film 32 is configured to be removable from the surface of the optical adjustment film 31. Thus, the protective film 32 can be left on the surface of the optical adjustment film 31 or removed from the surface of the optical adjustment film 31 at different times as needed. For example, when the optical film assembly 30 is attached to the light-emitting side surface of the display panel 10, leaving the protective film 32 on the surface of the optical adjustment film 31 prevents damage to the optical adjustment film 31 during the application of other film layers when it is necessary to further apply other film layers to the light-emitting side surface of the display panel 10. When the application of other film layers is completed, the surface of the optical adjustment film 31 can be removed.

[0053] Furthermore, the protective film 32 also includes an adhesive layer (not shown in the figure) bonded between the marking layer 322 and the protective layer 321. The marking layer 322 and the protective layer 321 are bonded together by the adhesive layer, or the marking layer 322 and the protective layer 321 are attracted to each other by electrostatic adsorption. In this way, by setting the adhesion between the marking layer 322 and the protective layer 321 to be greater than the adhesion between the protective layer 321 and the optical adjustment film 31, the marking layer 322 and the protective layer 321 can be peeled off from the surface of the optical adjustment film 31 simultaneously, thereby reducing operation steps and simplifying the process.

[0054] In an exemplary embodiment, the optical film assembly 30 includes an optical adjustment film 31 and a protective film 32 stacked together. The protective film 32 includes a protective layer 321 attached to one side surface of the optical adjustment film 31, an identification layer 322 attached to the side surface of the protective layer 321 facing away from the optical adjustment film 31, and a thickness compensation layer 323 attached to the side surface of the protective layer 321 facing away from the optical adjustment film 31. The identification layer 322 and the thickness compensation layer 323 are arranged side by side, and the surfaces of the identification layer 322 and the thickness compensation layer 323 facing away from the protective layer 321 are flush.

[0055] When the optical film assembly 30 needs to be applied to the display panel 10, the optical film assembly 30 can be cut according to the size of the display panel 10. After cutting, the optical film assembly 30 has two opposite sides along its own width direction. On one side, the optical adjustment film 31, the protective layer 321, and the thickness compensation layer 323 are stacked in sequence, and the cut surfaces of the optical adjustment film 31, the protective layer 321, and the thickness compensation layer 323 are located on the same plane; on the other side, the optical adjustment film 31, the protective layer 321, and the marking layer 322 are stacked in sequence, and the cut surfaces of the optical adjustment film 31, the protective layer 321, and the marking layer 322 are located on the same plane. In this way, the orthographic projection of at least one edge line of the recognition area 32a on the optical adjustment film 31 coincides with the corresponding edge line of the optical adjustment film 31.

[0056] Optionally, the optical film assembly 30 also includes a release film 33 disposed on the side of the optical adjustment film 31 facing away from the protective film 32. Specifically, the release film 33 can be a lightweight release film 33. Therefore, during the storage and transportation of the optical film assembly 30, the release film 33 can protect the side of the optical adjustment film 31 facing away from the protective film 32. When it is necessary to attach the optical film assembly 30 to the display panel 10, the release film 33 can be easily peeled off from the surface of the optical adjustment film 31.

[0057] See Figure 1 and Figure 3 Based on the same inventive purpose, this application also provides a display module 1.

[0058] In one embodiment of this application, the display module 1 includes a display panel 10, a buffer layer 20, and the optical adjustment film 31 and protective film 32 in the above embodiments.

[0059] Optionally, the display panel 10 is a flexible panel, so that a foldable screen can be made using the display panel 10.

[0060] See Figure 4 and Figure 5 Furthermore, the display panel 10 has adjacent bending areas 10a and non-bending areas 10b. When the display panel 10 is in the unfolded state, the bending areas 10a and non-bending areas 10b are located on the same plane; when the display panel 10 is in the bent / folded state, the bending area 10a is located on a curved surface, and the non-bending area 10b is located on a flat surface. When the display panel 10 is bent / folded, the stress on the bending area 10a changes. By providing a buffer layer (BPL) 20 located in the bending area 10a on the light-emitting side of the display panel 10, the display panel 10 can be protected in the bending area 10a.

[0061] See Figure 3 and Figure 4Furthermore, the optical adjustment film 31 is bonded to the light-emitting side surface of the display panel 10, and the protective film 32 is located on the side of the optical adjustment film 31 facing away from the display panel 10. The optical adjustment film 31 is located in the non-bending area 10b, and a gap 20a is provided between the optical adjustment film 31 and the buffer layer 20. Based on this, by optically detecting and identifying the edge line of the protective film 32, the position of the edge line of the optical adjustment film 31 can be determined, and the edge line of the optical adjustment film 31 can provide a positional reference for the setting of the buffer layer 20. Thus, a predetermined gap 20a can be reserved between the buffer layer 20 and the optical adjustment film 31, thereby providing a certain sliding space for different film layers on the display panel 10 during bending and folding.

[0062] See Figure 1 and Figure 2 Optionally, the optical adjustment film 31 is a polarizer 311. In this way, by placing the polarizer 311 on the light-emitting side of the display panel 10, the reflectivity of the display panel 10 to ambient light can be reduced.

[0063] See Figure 6 and Figure 7 Optionally, the optical adjustment film 31 includes a transparent support layer 312 and an optical adhesive layer 313 stacked together. Specifically, the transparent support layer 312 may be polyethylene terephthalate. Thus, the optical film assembly 30 can be implemented in conjunction with the display module 1 equipped with BPDL (black pixel definition layer).

[0064] See Figure 8 For example, the display panel 10 includes an array substrate 11, a pixel definition layer 12, a light-emitting device 13, an encapsulation layer 14, and a color filter 15.

[0065] A pixel definition layer 12 is disposed on the array substrate 11, and the pixel definition layer 12 has a pixel opening, with the light-emitting device 13 located at least partially within the pixel opening. Specifically, the pixel definition layer 12 can be a black pixel definition layer 12. The light-emitting device 13 includes an anode layer 131, an organic functional layer 132, and a cathode layer 133 stacked sequentially along a direction away from the array substrate 11. The pixel opening exposes the anode layer 131, and a portion of the cathode layer 133 is located within the pixel opening, while a portion extends outside the pixel opening. The organic functional layer 132 can specifically be a red light generator functional layer, a green light generator functional layer, and a blue light generator functional layer.

[0066] The encapsulation layer 14 is disposed on the side of the light-emitting device 13 facing away from the array substrate 11 to isolate the light-emitting device 13 from the environment outside the display panel 10 and prevent moisture intrusion. For example, an organic material can be disposed on the side of the light-emitting device 13 facing away from the array substrate 11 using inkjet printing (IJP) technology to form the encapsulation layer 14.

[0067] A color filter 15 is disposed on the side of the encapsulation layer 14 facing away from the light-emitting device 13, and the orthographic projection of the color filter 15 on the array substrate 11 at least partially overlaps with the orthographic projection of the light-emitting device 13 on the array substrate 11. Additionally, a black matrix 16 is also disposed on the side of the encapsulation layer 14 facing away from the light-emitting device 13, and the orthographic projection of the black matrix 16 on the array substrate 11 does not overlap with the orthographic projection of the light-emitting device 13 on the array substrate 11. Thus, without the polarizer 311, the light can be adjusted using the color filter 15 and the black matrix 16 to improve the display effect. Based on this, the optical adjustment film 31 can be a film layer formed by stacking a transparent support layer 312 and an optically clear adhesive layer 313 (OCA). Specifically, the transparent support layer 312 can be polyethylene terephthalate.

[0068] Optionally, the display panel 10 further includes a touch layer 17. Exemplarily, the touch layer 17 is disposed on the encapsulation layer 14, and the color filter 15 and the black matrix 16 are disposed on the side of the touch layer 17 facing away from the encapsulation layer 14.

[0069] See Figure 3 and Figure 8 Optionally, the display module 1 also includes a back plate (BP) 40, a support substrate 50, and a connecting layer 60 connecting the back plate 40 and the support substrate 50. The connecting layer 60 may be an optical adhesive. The back plate 40 is attached to the backlight side surface of the display panel 10 to support and protect the display panel 10.

[0070] For the same inventive purpose, this application also provides a method for manufacturing a display module.

[0071] See Figure 3 and Figure 4 In one embodiment of this application, the method for manufacturing a display module includes the following steps:

[0072] A display panel 10 and the aforementioned optical film assembly 30 are provided; wherein the display panel 10 has a bent area 10a and a non-bent area 10b adjacent to each other;

[0073] The optical adjustment film 31 and the protective film 32 of the optical film assembly 30 are disposed on the light-emitting side of the display panel 10; wherein, the optical adjustment film 31 is attached to the light-emitting side surface of the display panel 10 and is located in the non-bending area 10b, and the protective film 32 is located on the side of the optical adjustment film 31 that faces away from the display panel 10.

[0074] A buffer layer 20 is provided in the bending area 10a on the light-emitting side of the display panel 10, and a gap 20a is provided between the buffer layer 20 and the optical adjustment film 31.

[0075] The method for manufacturing this display module, by setting a protective film 32 on the side of the optical adjustment film 31 facing away from the display panel 10, can eliminate the influence of the optical performance of the optical adjustment film 31 itself and the influence of other external film layers during optical detection and recognition. The position of the optical adjustment film 31 can be identified by using the optical image of the recognition area 32a of the protective film 32, thereby improving the accuracy of optical detection and recognition, and thus making the setting position of the buffer layer 20 more accurate.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An optical film assembly, characterized in that, include: Optical conditioning film; as well as A protective film is disposed on one side surface of the optical adjustment film; The protective film has a recognition area, and the orthographic projection of at least one edge of the recognition area onto the optical adjustment film coincides with the corresponding edge of the optical adjustment film. The recognition area can present an optical image different from that of the optical adjustment film. The protective film includes a protective layer and a labeling layer stacked together; The area where the orthographic projection of the identification layer onto the protective layer is located is the identification area; The marking layer can present an optical image different from that of the optical adjustment film; The reflectivity of the marking layer is higher than that of the optical adjustment film.

2. The optical film assembly according to claim 1, characterized in that, The protective layer is bonded to the optical adjustment film; The marking layer is disposed on the side surface of the protective layer opposite to the optical adjustment film.

3. The optical film assembly according to claim 1, characterized in that, The marking layer includes a high-reflectivity film.

4. The optical film assembly according to claim 3, characterized in that, The labeling layer includes a reflective polarizer.

5. The optical film assembly according to claim 1, characterized in that, The color of the marking layer is different from the color of the optical adjustment film.

6. The optical film assembly according to claim 5, characterized in that, The identification layer includes a color filter.

7. The optical film assembly according to any one of claims 1-6, characterized in that, The protective film also includes a thickness compensation layer stacked with the protective layer; The thickness compensation layer and the marking layer are located on the same side of the protective layer, and the surface of the thickness compensation layer facing away from the protective layer is flush with the surface of the marking layer facing away from the protective layer.

8. The optical film assembly according to claim 7, characterized in that, The thickness compensation layer is made of the same material as the protective layer.

9. The optical film assembly according to any one of claims 1-8, characterized in that, The protective film is disposed on one side surface of the optical adjustment film, and the protective film is configured to be removable from the surface of the optical adjustment film.

10. The optical film assembly according to claim 9, characterized in that, The protective film also includes an adhesive layer bonded between the marking layer and the protective layer.

11. The optical film assembly according to claim 9, characterized in that, The identification layer and the protective layer are attracted to each other by electrostatic adsorption.

12. The optical film assembly according to claim 9, characterized in that, The optical film assembly also includes a release film disposed on the side of the optical adjustment film facing away from the protective film.

13. A display module, characterized in that, include: The display panel has adjacent bent and non-bent areas; A buffer layer is disposed on the light-emitting side of the display panel and located in the bending area; as well as The optical film assembly as described in any one of claims 1-12; The optical adjustment film of the optical film assembly is bonded to the light-emitting side surface of the display panel, and the protective film of the optical film assembly is located on the side of the optical adjustment film facing away from the display panel. The optical adjustment film is located in the non-bending region, and there is a gap between the optical adjustment film and the buffer layer.

14. The display module according to claim 13, characterized in that, The optical conditioning film includes a polarizer.

15. The display module according to claim 13, characterized in that, The display panel includes: Array substrate; A pixel definition layer is disposed on the array substrate, and the pixel definition layer is provided with pixel openings; The light-emitting device is at least partially located within the pixel opening; An encapsulation layer is disposed on the side of the light-emitting device facing away from the array substrate; A color filter is disposed on the side of the encapsulation layer opposite to the light-emitting device, and the orthographic projection of the color filter on the array substrate at least partially overlaps with the orthographic projection of the light-emitting device on the array substrate; The optical adjustment film includes a transparent support layer and an optical adhesive layer stacked together.

16. A method for manufacturing a display module, characterized in that, Includes the following steps: A display panel and an optical film assembly according to any one of claims 1-12 are provided; wherein the display panel has adjacent bent and non-bent areas; The optical adjustment film and the protective film of the optical film assembly are disposed on the light-emitting side of the display panel; wherein, the optical adjustment film is attached to the light-emitting side surface of the display panel and is located in the non-bending area, and the protective film is located on the side of the optical adjustment film facing away from the display panel; A buffer layer is provided in the bending area on the light-emitting side of the display panel, and a gap is provided between the buffer layer and the optical adjustment film.

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