Display module and preparation method therefor, and display device

Abstract

The present disclosure provides a display module and a preparation method therefor, and a display device. The display module comprises an OLED display panel; and a bubble film layer provided on a light-emitting side of the OLED display panel, wherein several bubbles arranged in an array are provided inside the bubble film layer and on a side close to the OLED display panel, and the projections of the bubbles on the OLED display panel have no overlap with pixel light-emitting units of the OLED display panel. The technical solution provided in the present disclosure can improve the front-side light extraction efficiency of OLED panels, thereby improving the efficiency of display devices and reducing power consumption; and the preparation process involves a simple structure that can be easily implemented, a broad selection of preparation materials and a simple manufacturing procedure. The technical solution provided in the present disclosure can also effectively ameliorate edge light leakage of OLED screens, can improve the light extraction efficiency of the OLED screens, and has a promotion value.

Description

Display module and its manufacturing method, display device Technical Field

[0001] This disclosure relates to the technical field of display modules, specifically to a display module, its manufacturing method, and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) display technology is self-emissive, employing a very thin coating of organic material and a glass substrate. When an electric current passes through, these organic materials emit light. OLED displays also offer wide viewing angles and significantly save energy. Because OLED display technology possesses many advantages that LED (Light-Emitting Diode) display technology cannot match, it has been widely adopted in the display industry.

[0003] In the existing technology, with the increasingly widespread application of OLED display technology, higher requirements are also being put forward for the display effect of OLED display technology, such as further improving the light output of OLED display panels and eliminating light leakage at the edges of OLED screens, especially flexible OLED screens.

[0004] Summary of the Invention

[0005] In view of the problems in the prior art, the purpose of this disclosure is to provide a display module and its manufacturing method and display device, which can improve the front light output of OLED display panel, and effectively improve the edge light leakage of OLED screen and improve light output efficiency.

[0006] Specifically, the first aspect of this disclosure provides a display module, which may include:

[0007] OLED display panel;

[0008] A bubble film layer is disposed on the light-emitting side of the OLED display panel, and several bubbles are arranged in an array inside the bubble film layer on the side close to the OLED display panel.

[0009] The projection of the bubble onto the OLED display panel does not overlap with the pixel light-emitting units of the OLED display panel.

[0010] In one possible implementation of the first aspect above, the material for preparing the bubble film layer includes graphene oxide;

[0011] Bubbles are generated by femtosecond laser irradiation of predetermined positions on graphene oxide.

[0012] In one possible implementation of the first aspect above, the material for preparing the bubble film layer includes a polymeric resin material compressed with an inert gas;

[0013] Bubbles are generated by heating and gas expansion at a predetermined location on the polymer resin material.

[0014] In one possible implementation of the first aspect above, the display module further includes a circular polarizer disposed on the light-emitting side of the OLED display panel;

[0015] The circular polarizer comprises a phase retardation film, a first protective film, a polarizing film, and a second protective film, stacked sequentially, wherein:

[0016] The lower surface of the first protective film layer includes several grooves arranged at intervals, so that several gap regions matching the shape of the grooves are formed between the first protective film layer and the phase difference film layer after they are bonded together.

[0017] In one possible implementation of the first aspect described above, the first protective film layer and the phase difference film layer are attached using a pressure-sensitive adhesive or a water-based adhesive.

[0018] Pressure-sensitive adhesives or water-based adhesives do not interfere with the void area.

[0019] The second aspect of this disclosure provides a method for manufacturing a display module, used to manufacture the display module provided in the first aspect, the method comprising the following steps:

[0020] Provide OLED display panels;

[0021] A bubble film layer is set on the light-emitting side of the OLED display panel. Inside the bubble film layer, near the side of the OLED display panel, there are several bubbles arranged in an array. The projection of the bubbles on the OLED display panel does not intersect with the pixel light-emitting unit of the OLED display panel.

[0022] In one possible implementation of the second aspect above, the process of setting the bubble film layer on the light-emitting side of the OLED display panel includes the following steps:

[0023] A film layer is formed on the light-emitting side of the OLED display panel using graphene oxide material;

[0024] Femtosecond laser irradiation is performed at a preset position on the film to generate bubbles with controllable shapes, and the bubbles correspond to the preset positions.

[0025] In one possible implementation of the second aspect above, the process of setting the bubble film layer on the light-emitting side of the OLED display panel includes the following steps:

[0026] A transparent electrode is set at the corresponding position of the bubble on the light-emitting side of the OLED display panel;

[0027] A polymer resin material is coated on the entire surface or a portion of the light-emitting side of the OLED display panel.

[0028] Compressing inert gas within polymer resin materials;

[0029] The polymer resin material is heated by a transparent electrode to allow inert gas to escape.

[0030] The display module will be placed in a vacuum environment, causing the overflowing inert gas to expand and form bubbles.

[0031] In one possible implementation of the second aspect above, the display module includes a circular polarizer disposed on the light-emitting side of the OLED display panel;

[0032] The preparation method of a circular polarizer includes the following steps:

[0033] A first protective film layer, a polarizing film layer, and a second protective film layer are provided in sequence, wherein the first protective film layer forms a plurality of grooves arranged at intervals on its lower surface by at least one of the following methods: hot pressing, laser etching, and die stamping.

[0034] A phase retardation film is attached to the lower surface of the first protective film layer, and a number of gap regions matching the shape of the groove are formed between the first protective film layer and the phase retardation film layer after attachment.

[0035] A third aspect of this disclosure provides a display device including the display module provided in the first aspect.

[0036] Compared with the prior art, this disclosure has the following beneficial effects:

[0037] The technical solution provided in this disclosure can improve the front light extraction efficiency of OLED panels, thereby improving the efficiency of display devices and reducing power consumption. The fabrication process is simple and easy to implement, with a wide range of materials to choose from, and the process is straightforward. Furthermore, the technical solution provided in this disclosure can effectively improve edge light leakage in OLED screens and enhance their light extraction efficiency, making it worthy of widespread application. Attached Figure Description

[0038] Other features, objects, and advantages of this disclosure will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0039] Figure 1 is a partial cross-sectional structural diagram of a display module according to an embodiment of the present disclosure.

[0040] Figure 2, according to an embodiment of the present disclosure, provides a schematic diagram illustrating how changes in the bubble cut angle affect the light emission efficiency of the front side of an OLED display panel.

[0041] Figure 3 is a partial cross-sectional view of a circular polarizer structure in a display module according to an embodiment of the present disclosure.

[0042] Figure 4a is a schematic diagram of the edge light leakage intensity change rate curve of an OLED screen with a cover plate thickness of 1.4 mm, according to an embodiment of the present disclosure.

[0043] Figure 4b is a schematic diagram of the edge light leakage intensity change rate curve of an OLED screen with a cover plate thickness of 1 mm, according to an embodiment of the present disclosure.

[0044] Figure 5 is a flowchart illustrating a method for preparing a display module according to an embodiment of this disclosure.

[0045] Figure 6a is a schematic diagram of a process for setting a bubble film layer on the light-emitting side of an OLED display panel according to an embodiment of the present disclosure.

[0046] Figure 6b provides a schematic diagram of another process for setting a bubble film layer on the light-emitting side of an OLED display panel according to an embodiment of the present disclosure.

[0047] Figure 7 is a schematic flowchart of a method for preparing a circular polarizer disposed on the light-emitting side of an OLED display panel according to an embodiment of the present disclosure. Detailed Implementation

[0048] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed herein. This disclosure can also be implemented or applied to systems through other different specific embodiments, and various details in this disclosure can also be modified or changed according to different viewpoints and application systems without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0049] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0050] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples.

[0051] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a plurality of" means two or more, unless otherwise expressly and specifically defined.

[0052] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0053] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0054] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0055] The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, “A, B, or C” or “A, B, and / or C” means “any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C”. Exceptions to this definition occur only when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

[0056] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0057] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0058] Based on the relevant description in the background section, it can be understood that, in order to further improve the front light extraction efficiency of OLED display panels, this disclosure provides a display module and its manufacturing method, as well as a display device, which can improve the front light extraction efficiency of OLED display panels, while effectively improving edge light leakage and enhancing light extraction efficiency of OLED screens. Specifically, Figure 1 shows a partial cross-sectional structural schematic diagram of a display module according to an embodiment of this disclosure. As shown in Figure 1, the display module may specifically include:

[0059] OLED display panel 001. The display panel 001 includes an array of pixel light-emitting units, as shown in Figure 1, including a red pixel unit 001R, a green pixel unit 001G, and a blue pixel unit 001B. Those skilled in the art can choose a suitable pixel arrangement according to actual needs, which is not limited here.

[0060] A bubble film layer 002 is disposed on the light-emitting side of the OLED display panel 001. Inside the bubble film layer 002, near the side of the OLED display panel 001, there are several arrayed bubbles 0021. The projection of the bubbles 0021 onto the OLED display panel 001 does not intersect with the pixel light-emitting units of the OLED display panel 001. As shown in Figure 1, the vertical arrangement of the bubbles 0021 is staggered with the arrangement of the pixel light-emitting units, and does not affect the arrangement of the pixel light-emitting units in the vertical light-emitting path. However, the oblique light-emitting paths provided by the blue pixel unit 001B and the red pixel unit 001R as shown in Figure 1 will be transformed into vertical light-emitting paths by the refraction of the bubbles 0021, thereby improving the front light emission rate of the OLED display panel.

[0061] It is understood that the bubble film layer 002 proposed in this disclosure is equivalent to forming a BBA structure (Bragg-Based Architecture) on the light-emitting side of the OLED display panel 001. Through optimized multi-layer structural design, it can reduce light reflection loss within the OLED display module, while simultaneously guiding and extracting the light generated internally, allowing more light to emerge from the desired direction (generally the front direction) of the OLED display panel. The specific structural morphology of the aforementioned bubble film layer 002 will be described in detail below:

[0062] In the above embodiments, as shown in FIG1, the chamfer angle of the bubble 0021 in the bubble film layer 002 can be set to be in the range of 56° to 79°. For example, FIG2 shows a schematic diagram illustrating the effect of changing the bubble chamfer angle on the light extraction efficiency of the front side of the OLED display panel. As shown in FIG2, the chamfer angle of the bubble 0021 in the range of 56° to 79° has an effect on improving the light extraction efficiency of the OLED display panel, and the improvement in light extraction efficiency shows a trend of first increasing and then decreasing, with the maximum improvement in light extraction efficiency at around 57°. Those skilled in the art can select appropriate bubble 0021 size and structure to obtain the required bubble chamfer angle according to actual needs, which is not limited here.

[0063] In the above embodiments, since the bubble film layer 002 contains bubble 0021 structures, which are equivalent to acting as a low refractive index material, it is not necessary to use a low refractive index material for preparing the bubble film layer 002. In specific implementation, the material for preparing the bubble film layer 002 can be a material with a refractive index greater than 1.5. For applications requiring low refractive index, there is a wide range of material choices. Those skilled in the art can select the material for preparing the bubble film layer 002 according to actual needs, and no limitation is made here.

[0064] In the above embodiments, in one alternative implementation, the material for preparing the bubble film layer 002 can be graphene oxide. Femtosecond laser irradiation of predetermined positions on the graphene oxide material can generate bubble structures of controllable size. In another alternative implementation, the material for preparing the bubble film layer 002 can be a polymer resin material compressed with inert gas. Heating predetermined positions on the polymer resin material causes the inert gas to overflow and expand into the desired bubble structure. The specific preparation process of the bubble film layer 002 will be described in detail later.

[0065] In some embodiments of this disclosure, Figure 3 shows a partial cross-sectional view of a circular polarizer structure in a display module. The display module provided in this disclosure also includes a circular polarizer 003 disposed on the light-emitting side of the OLED display panel 001. The circular polarizer structure shown in Figure 3 can be disposed between the bubble film layer 002 and the OLED display panel 001. In another alternative implementation, the bubble film layer 002 can also be disposed between the circular polarizer 003 and the OLED display panel 001, as long as it is located on the light-emitting side of the OLED display panel 001; this is not limited here.

[0066] As shown in Figure 3, specifically, the circular polarizer 003 includes a phase retardation film layer 0031, a first protective film layer 0032, a polarizing film layer 0033, and a second protective film layer 0034 stacked sequentially. The lower surface of the first protective film layer 0032 includes several grooves 00321 arranged at intervals, so that after lamination, several gap regions 0035 matching the shape of the grooves are formed between the first protective film layer 0032 and the phase retardation film layer 0031. It can be understood that because air is present in the gap regions 0035, it can have a light-collecting effect on the upward emission of the OLED display panel 001, improving the light emission efficiency of the OLED display panel 001, and effectively improving the edge light leakage of the OLED screen. For example, Figure 4a shows a schematic diagram of the edge light leakage intensity change rate curve of an OLED screen with a 1.4mm thick encapsulation cover. The vertical axis represents the edge light leakage intensity of the 1.4mm thick encapsulation cover, and the horizontal axis represents the distance from the boundary of the light-emitting area in the OLED screen to the corresponding edge of the encapsulation cover. As shown in Figure 4a, curve 401 represents the change rate curve corresponding to the circular polarizer structure used in the prior art, and curve 402 represents the change rate curve corresponding to the circular polarizer 003 structure provided in the aforementioned embodiment. Comparing curves 401 and 402, it can be found that with the circular polarizer 003 structure provided in the aforementioned embodiment, the initial light leakage intensity corresponding to curve 402 is lower than that corresponding to curve 401, and the decreasing slope corresponding to curve 402 is significantly greater than that corresponding to curve 401. This indicates that under the same OLED screen setting environment, the edge light leakage intensity of the circular polarizer 003 structure provided in the aforementioned embodiment is lower, and the light leakage intensity decreases more significantly with the increase of distance to the edge, which can effectively improve the edge light leakage of the OLED screen. For example, Figure 4b shows the edge light leakage intensity variation curve of an OLED screen with a 1mm thick encapsulation cover. The vertical axis also represents the edge light leakage intensity of the 1mm thick encapsulation cover, and the horizontal axis represents the distance from the boundary of the light-emitting area in the OLED screen to the corresponding edge of the encapsulation cover. As shown in Figure 4b, curve 403 represents the variation curve corresponding to the circular polarizer structure used in the prior art, and curve 404 represents the variation curve corresponding to the circular polarizer 003 structure provided in the aforementioned embodiment. Comparing curves 403 and 404, it can be found that the circular polarizer 003 structure corresponding to curve 404 can significantly reduce the edge light leakage of the OLED screen, with a significant improvement effect. At the same time, comparing Figures 4a and 4b, it can be seen that when the encapsulation cover thickness is small, the circular polarizer 003 structure provided in the aforementioned embodiment has a better improvement effect on the edge light leakage.

[0067] In one specific implementation of the above embodiments, the horizontal cross-sectional width of the groove 00321 can be set to less than 100 μm, and the horizontal cross-sectional spacing between two adjacent grooves 00321 can be set to less than 50 μm, thereby ensuring the improvement of the light emission effect on the front side of the pixel light-emitting unit. Those skilled in the art can determine the corresponding groove distribution pattern according to actual needs and the arrangement of the pixel light-emitting units, which is not limited here.

[0068] In one specific implementation of the above embodiments, the first protective film layer 0032 and the phase difference film layer 0031 can be attached using pressure-sensitive adhesive or water-based adhesive. During the attachment process, the pressure-sensitive adhesive or water-based adhesive only provides adhesion at the contact surface between the first protective film layer 0032 and the phase difference film layer 0031, and does not interfere with the gap area 0035.

[0069] In some embodiments of this disclosure, Figure 5 shows a schematic flowchart of a method for fabricating a display module. This method is used to fabricate the display module provided in the foregoing embodiments. As shown in Figure 5, this fabrication method may include the following steps:

[0070] Step 501: Provide an OLED display panel.

[0071] Step 502: A bubble film layer is formed on the light-emitting side of the OLED display panel. The bubble film layer contains an array of bubbles arranged close to the OLED display panel, and the projections of these bubbles onto the OLED display panel do not intersect with the pixel light-emitting units of the OLED display panel. The specific implementation of steps 501 to 502 will be further explained below.

[0072] In one specific implementation of step 502 of the above embodiments, FIG6a shows a schematic diagram of a process for setting a bubble film layer on the light-emitting side of an OLED display panel. As shown in FIG6a, the process may include the following steps:

[0073] Step 502a: A film layer is formed on the light-emitting side of the OLED display panel using graphene oxide material.

[0074] Step 502b: Femtosecond laser irradiation is performed at a preset position on the film layer to generate bubbles with controllable shape. Those skilled in the art will understand that femtosecond laser irradiation of graphene oxide materials can produce bubble structures with controllable size and shape, and the positions of the bubble structures correspond one-to-one with the preset positions.

[0075] In another specific implementation of step 502 of the above embodiments, FIG6b shows another schematic diagram of the process for setting a bubble film layer on the light-emitting side of the OLED display panel. As shown in FIG6b, it may include the following steps:

[0076] Step 5021: On the light-emitting side of the OLED display panel, a transparent electrode is disposed at the corresponding position of the bubble. The transparent electrode can be made of materials such as transparent conductive oxide (Indium Tin Oxide, ITO), and there is no limitation on its use here.

[0077] Step 5022: Apply a polymer resin material to the entire surface or a portion of the light-emitting side of the OLED display panel. The area covered by the polymer resin material corresponds to the pixel distribution area.

[0078] Step 5023: Compressing inert gas into the polymer resin material. This can be achieved by pressurizing the polymer resin material to compress the inert gas.

[0079] Step 5024: Heat the polymer resin material through a transparent electrode to allow the inert gas to escape.

[0080] Step 5025: Place the display module in a vacuum environment to allow the overflowing inert gas to expand and form bubbles. It is understood that after the bubble structure is formed, the bubble film structure can also be cured using ultraviolet light curing; this is not limited to this step.

[0081] It is understood that in the preparation methods provided in steps 502a to 502b and steps 5021 to 5025 above, no photomask is required during the preparation of the bubble film layer, which can reduce the overall number of preparation processes for the OLED module and simplify the process.

[0082] In the above embodiments, Figure 7 further illustrates a flowchart of a method for fabricating a circular polarizer disposed on the light-emitting side of an OLED display panel. As shown in Figure 7, the method may specifically include the following steps:

[0083] Step 701: Provide a first protective film layer, a polarizing film layer, and a second protective film layer stacked sequentially. The first protective film layer may have a plurality of grooves arranged at intervals formed on its lower surface by at least one or more combinations of hot stamping, laser etching, and die stamping.

[0084] Step 702: A phase retardation film layer is attached to the lower surface of the first protective film layer, and a number of gap regions matching the shape of the groove are formed between the attached first protective film layer and the phase retardation film layer.

[0085] In some embodiments of this disclosure, a display device is also provided, including the display module provided in the foregoing embodiments, which can also achieve the application effect of improving the front light emission rate of the OLED panel. Those skilled in the art can choose any combination of the solutions provided in the foregoing embodiments according to actual needs, and no limitation is made here.

[0086] In summary, the technical solution provided in this disclosure can improve the front light extraction efficiency of OLED panels, thereby increasing the efficiency of display devices and reducing power consumption. The fabrication process is simple and easy to implement, with a wide range of materials to choose from, and the process is straightforward. Furthermore, the technical solution provided in this disclosure can effectively improve edge light leakage in OLED screens and enhance their light extraction efficiency, making it worthy of widespread application.

[0087] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this disclosure and should not be construed as limiting the specific implementation of this disclosure to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this disclosure, and all such modifications and substitutions should be considered within the scope of protection of this disclosure.

Claims

1. A display module, characterized in that, include: OLED display panel; A bubble film layer is disposed on the light-emitting side of the OLED display panel, and a plurality of bubbles are arranged in an array inside the bubble film layer near the OLED display panel. The projection of the bubble onto the OLED display panel does not intersect with the pixel light-emitting units of the OLED display panel.

2. The display module as described in claim 1, characterized in that, The material used to prepare the bubble film layer includes graphene oxide; The bubbles are generated by femtosecond laser irradiation of predetermined positions on the graphene oxide.

3. The display module as described in claim 1, characterized in that, The material used to prepare the bubble membrane layer includes a polymer resin material compressed with inert gas; The bubbles are generated by heating and gas expansion at a predetermined location on the polymer resin material.

4. The display module as described in claim 1, characterized in that, The display module also includes a circular polarizer disposed on the light-emitting side of the OLED display panel; The circular polarizer comprises a phase retardation film, a first protective film, a polarizing film, and a second protective film, stacked sequentially, wherein: The lower surface of the first protective film layer includes a plurality of grooves arranged at intervals, so that a plurality of gap regions matching the shape of the grooves are formed between the first protective film layer and the phase difference film layer after they are attached.

5. The display module as described in claim 4, characterized in that, The first protective film layer and the phase difference film layer are attached together using pressure-sensitive adhesive or water-based adhesive; The pressure-sensitive adhesive or the water-based adhesive does not interfere with the void area.

6. A method for manufacturing a display module, characterized in that, The method for preparing a display module as described in any one of claims 1 to 5 comprises the following steps: Provide OLED display panels; A bubble film layer is provided on the light-emitting side of the OLED display panel. Inside the bubble film layer, near the side of the OLED display panel, there are several bubbles arranged in an array. The projection of the bubbles on the OLED display panel does not intersect with the pixel light-emitting unit of the OLED display panel.

7. The method for preparing a display module as described in claim 6, characterized in that, The process of setting the bubble film layer on the light-emitting side of the OLED display panel includes the following steps: A film layer is formed on the light-emitting side of the OLED display panel using graphene oxide material; A femtosecond laser is used to irradiate a preset position on the film to generate a bubble with a controllable shape, the bubble corresponding to the preset position.

8. The method for preparing a display module as described in claim 6, characterized in that... The process of setting the bubble film layer on the light-emitting side of the OLED display panel includes the following steps: A transparent electrode is disposed at the corresponding position of the bubble on the light-emitting side of the OLED display panel; A polymer resin material is coated on the entire surface or a portion of the light-emitting side of the OLED display panel; Inert gas is compressed within the polymer resin material; The polymer resin material is heated through the transparent electrode to allow the inert gas to escape. The display module is placed in a vacuum environment, causing the overflowing inert gas to expand and form the bubbles.

9. The method for preparing the display module as described in claim 6, characterized in that, The display module includes a circular polarizer disposed on the light-emitting side of the OLED display panel; The method for preparing the circular polarizer includes the following steps: A first protective film layer, a polarizing film layer, and a second protective film layer are provided in sequence, wherein the first protective film layer forms a plurality of grooves arranged at intervals on its lower surface by at least one of the following methods: hot pressing, laser etching, and die stamping. A phase retardation film layer is attached to the lower surface of the first protective film layer. The attached first protective film layer... A number of gap regions matching the shape of the groove are formed between the protective film layer and the phase difference film layer.

10. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 6.

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