Protective film, display module, display device and method for detecting fingerprint recognition function

Abstract

This application provides a protective film, a display module, a display device, and a method for detecting fingerprint recognition functionality. The protective film is applied to a display module, which includes a display panel and a cover plate disposed on the light-emitting side of the display panel. The display panel includes a fingerprint recognition area. The protective film includes a first part and a second part connected to the first part. The first part covers the cover plate and has a cutout area. When the first part is in contact with the cover plate, the cutout area is positioned opposite to the fingerprint recognition area. The second part is configured to be flipped relative to the first part in a direction toward or away from the first part, so that the second part covers or exposes the cutout area.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a protective film, display module, display device, and a method for detecting fingerprint recognition function. Background Technology

[0002] In recent years, biometric technology has developed rapidly, especially fingerprint recognition technology, which is widely used in various display modules. After the fingerprint recognition module is attached to the display panel, the fingerprint function needs to be tested. During testing, a detection fixture, such as a dummy finger module, is needed to contact the fingerprint recognition area of ​​the display panel to simulate the characteristics of a human fingerprint. Then, a testing program and specific algorithms are used to detect whether the fingerprint function is normal.

[0003] To protect the display module's screen, a protective film is usually applied to the cover plate. However, this film can affect the accuracy of fingerprint detection when testing the fingerprint function. Therefore, fingerprint testing must be performed with the protective film removed, and then the film reapplied after the test. This process can cause the protective film to become dirty, and air bubbles may form during reapplication, thus reducing its protective effect on the display module. Summary of the Invention

[0004] Therefore, it is necessary to provide a detection method for a protective film, a display module, a display device, and a fingerprint recognition function, so as to improve the protective effect of the protective film on the display module while ensuring the accuracy of fingerprint detection.

[0005] An embodiment of the first aspect of this application provides a protective film applied to a display module, the display module including a display panel and a cover plate disposed on the light-emitting side of the display panel, the display panel including a fingerprint recognition area, the protective film including a first part and a second part connected to the first part; the first part is used to cover the cover plate, the first part is provided with a cutout area, and when the first part is attached to the cover plate, the cutout area is disposed opposite to the fingerprint recognition area; the second part is configured to be flipped relative to the first part in a direction toward or away from the first part, so that the second part covers or exposes the cutout area.

[0006] In some embodiments, the protective film further includes a tear-off portion connected to the second portion.

[0007] In some embodiments, the shape of the cutout area includes a rectangle, a square, or a circle.

[0008] In some embodiments, the shape of the second part includes a rectangle, a square, or a circle.

[0009] In some embodiments, the second part is provided with a plurality of vent holes, which are arranged in multiple rows along a first direction and in multiple columns along a second direction, wherein the first direction and the second direction intersect.

[0010] An embodiment of the second aspect of this application provides a display module, including a display panel, a cover plate disposed on the light-emitting side of the display panel, and a protective film as described in the first aspect;

[0011] The display panel includes a fingerprint recognition area, the first part covers the cover plate, and the cutout area is disposed opposite to the fingerprint recognition area.

[0012] In some embodiments, the orthographic projection of the cutout area onto the display panel covers the fingerprint recognition area.

[0013] In some embodiments, the display module further includes a fingerprint recognition module disposed on the side of the display panel opposite to the cover plate;

[0014] In the thickness direction of the display module, the fingerprint recognition module is positioned opposite to the fingerprint recognition area.

[0015] In some embodiments, the fingerprint recognition module includes an ultrasonic fingerprint recognition module and an optical fingerprint recognition module.

[0016] An embodiment of the third aspect of this application provides a display device including the display module described in the second aspect.

[0017] An embodiment of the fourth aspect of this application provides a fingerprint recognition detection method, applied to the display module described in the second aspect, comprising:

[0018] The second part is flipped relative to the first part in a direction away from the first part, so that the second part exposes the hollow area;

[0019] The fingerprint recognition area of ​​the display panel is detected;

[0020] The second part is flipped relative to the first part in a direction toward the first part so that the second part covers the cutout area.

[0021] In this application, the protective film includes a first part and a second part. The first part covers the cover plate and has a cutout area. When the first part is attached to the cover plate, the cutout area is positioned opposite the fingerprint recognition area. The second part is configured to flip relative to the first part in a direction facing or away from the first part, so that the second part covers or exposes the cutout area. In this way, the cutout area exposes the area on the cover plate opposite to the fingerprint recognition area of ​​the display panel. When fingerprint detection is performed, the second part is flipped relative to the first part in a direction away from the first part, exposing the cutout area. At this time, the detection fixture can be directly attached to the cover plate through the cutout area to detect the fingerprint recognition area of ​​the display panel, thereby improving the accuracy and reliability of fingerprint detection. After fingerprint detection is completed, the second part is flipped relative to the first part in a direction facing the first part, covering the cutout area. At this time, the second part re-protects the cover plate. Throughout the process, the first part remains attached to the cover plate, while only the second part is flipped. This avoids completely removing the protective film, thus reducing the probability of dirt and air bubbles forming on the protective film and improving its protective effect on the display module. Furthermore, because only the second part is flipped during the testing process, the protective film can be reused without replacement, saving on processing time and reducing production costs. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural diagram of the display module according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of the second exposed hollow area of ​​the protective film according to an embodiment of this application;

[0024] Figure 3 for Figure 2 The diagram shows the structure of the second part of the protective film covering the hollow area;

[0025] Figure 4 This is a schematic diagram of one structure of the protective film according to an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of another structure of the protective film according to an embodiment of this application;

[0027] Figure 6 This is a flowchart of a fingerprint recognition function detection method according to an embodiment of this application.

[0028] The attached figures are labeled as follows:

[0029] 10 - Display module; 11 - Display panel;

[0030] 11a - Fingerprint recognition area; 12 - Cover plate;

[0031] 100 - Protective film; 110 - Part 1;

[0032] 110a - Hollowed-out area; 120 - Second part;

[0033] 121 - Vent hole; 130 - Film tearing section;

[0034] 200 - Fingerprint recognition module; 210 - Ultrasonic fingerprint recognition module;

[0035] 211 - Thin-film transistor layer; 212 - Piezoelectric layer;

[0036] 2111 - Thin Film Transistor Circuit. Detailed Implementation

[0037] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] As described in the background section, a protective film is typically applied to the cover plate of the display module to protect its screen. However, this protective film can affect the accuracy of fingerprint detection during testing. Therefore, fingerprint testing must be performed with the protective film removed, and then the film reapplied after the test. This process leads to the protective film becoming dirty and air bubbles forming during reapplication. Statistics show that manually reapplying the protective film after testing results in 100% of cases producing air bubbles and 60% producing foreign matter, thus reducing the protective film's effectiveness in protecting the display module.

[0044] Based on the above issues, such as Figure 1 and Figure 2As shown, an embodiment of the first aspect of this application provides a protective film 100 applied to a display module 10. The display module 10 includes a display panel 11 and a cover plate 12 disposed on the light-emitting side of the display panel 11. The display panel 11 includes a fingerprint recognition area 11a. The protective film 100 includes a first part 110 and a second part 120 connected to the first part 110. The first part 100 is used to cover the cover plate 12. A cutout area 110a is provided on the first part 110. When the first part 110 is attached to the cover plate 12, the cutout area 110a is disposed opposite to the fingerprint recognition area 11a. The second part 120 is configured to be flipped relative to the first part 110 in a direction toward or away from the first part 110, so that the second part 120 covers or exposes the cutout area 110a.

[0045] In this application, the protective film 100 is applied to the display module 10. Specifically, the display module 10 includes a display panel 11 and a cover plate 12. The display panel 11 is the main structure in the display module 10 that realizes the display of the image. The display panel 11 in this application can be an active light-emitting display panel, such as an organic light-emitting diode (OLED) display panel, a micro light-emitting diode (Micro Light-emitting Diode) display panel, an active matrix OLED display panel, a passive matrix OLED display panel, a quantum dot OLED display panel, etc. The display panel 11 can also be a liquid crystal display panel, such as a vertical electric field type liquid crystal display panel, a twisted nematic liquid crystal display panel, or a horizontal electric field type liquid crystal display panel, etc., and this application does not limit this. The display panel 11 includes a fingerprint recognition area 11a, which is used to detect a person's fingerprint to realize various human-computer interaction functions of the display module.

[0046] Cover plate 12 is a protective plate that protects the display panel 11. Therefore, cover plate 100 needs to be damage-resistant and meet testing requirements such as impact resistance and surface hardness. Cover plate 12 is usually made of a high-transmittance material to avoid affecting the display effect of the display panel 11. Cover plate 12 can be made of rigid or flexible materials. For example, cover plate 12 can be made of transparent, soft, and foldable materials such as ultra-thin flexible glass, transparent polyimide film, and polyethylene terephthalate to achieve the bendability and foldability of cover plate 12, thus allowing cover plate 12 to be used in flexible and foldable display panels. Alternatively, cover plate 12 can also be made of rigid glass, thus allowing cover plate 12 to be used in rigid display panels.

[0047] In this application, the protective film 100 covers the cover plate 12, thereby further protecting the display module 10 and preventing the cover plate 12 from being affected by external bumps, scratches, or other damage, which would affect the normal display of the display panel 11. Specifically, the protective film 100 includes a first part 110 and a second part 120. The first part 110 is used to cover the cover plate 12, and a cutout area 110a is provided on the first part 110. When the first part 110 is attached to the cover plate 12, the cutout area 110a is positioned opposite to the fingerprint recognition area 11a of the display panel 11. The second part 120 is configured to be flipped relative to the first part 110 in a direction toward or away from the first part 110, so that the second part 120 covers or exposes the cutout area 110a. In this way, the cutout area 110a exposes the area on the cover plate 12 opposite to the fingerprint recognition area 11a of the display panel 11. When fingerprint detection is performed, such as Figure 2 As shown, the second part 120 is flipped relative to the first part 110 in a direction away from the first part 110, exposing the cutout area 110a. At this time, the detection fixture can be directly attached to the cover plate 12 through the cutout area 110a to detect the fingerprint recognition area 11a of the display panel 11, thereby improving the accuracy and reliability of fingerprint detection. After fingerprint detection is completed, as... Figure 3 As shown, the second part 120 is flipped relative to the first part 110 in a direction toward the first part 110, so that the second part 120 covers the cutout area 110a. At this time, the second part 120 re-protects the cover plate 12. Throughout the process, the first part 110 remains attached to the cover plate 12, and only the second part 120 is flipped, avoiding the complete removal of the protective film. This helps reduce the probability of dirt and bubbles forming on the protective film 100, thereby improving the protective effect of the protective film 100 on the display module 10. In addition, since only the second part 120 is flipped during the entire testing process, and the entire protective film 100 is not removed, the protective film 100 can be reused without replacement, which also helps save on processes and reduce production costs.

[0048] It should be noted that the connection between the first part 110 and the second part 120 means that the first part 110 can be bonded to at least one edge of the second part 120 by means of a connector such as glue; or, as Figure 2 and Figure 3 As shown, the first part 110 and the second part 120 are an integral structure, and at least one edge of the first part 110 and the second part 120 are integrally connected. Furthermore, a crease may be provided at the connection between the second part 120 and the second part 110 to facilitate flipping the second part 120. This application does not impose any limitations on this.

[0049] In some embodiments, such as Figure 4As shown, the protective film 100 also includes a tear-off section 130 connected to the second part 120. The tear-off section 130 is a structure that facilitates tearing and flipping the second part 120. By using the tear-off section 130, the operator can flip the second part 120 relative to the first part 110, thereby improving the ease of flipping.

[0050] In some embodiments, the shape of the cutout area 110a includes a rectangle, a square, or a circle. These shapes are easy to manufacture, thereby reducing the production difficulty of the protective film 100.

[0051] Since the second part 120 is used to cover or expose the cutout area 110a, in some embodiments, the shape of the second part 120 also includes rectangles, squares, and circles. These shapes are easy to manufacture, thereby helping to reduce the production difficulty of the protective film 100.

[0052] In some embodiments, such as Figure 5 As shown, the second part 120 is provided with a plurality of exhaust holes 121, which are arranged in multiple rows along the first direction X and in multiple columns along the second direction Y, and the first direction X and the second direction Y intersect.

[0053] In this embodiment, a vent hole 121 is also provided on the second part 120. Thus, when the second part 120 is flipped over to cover the hollow area 110a, even if air bubbles are generated between the second part 120 and the cover plate 12, the air bubbles can be discharged through the vent hole 121, thereby reducing the probability of air bubbles forming between the second part 120 and the cover plate 12, and further improving the protective effect of the protective film 100 on the display module 10. Furthermore, in this embodiment, multiple vent holes 121 are arranged in multiple rows along the first direction X and in multiple columns along the second direction Y. This ensures that the vent holes 121 are evenly distributed on the second part 120, maximizing the discharge of air bubbles between the second part 120 and the cover plate 12, thereby further improving the adhesion between the second part 120 and the cover plate 12.

[0054] An embodiment of the second aspect of this application provides a display module 10. For example... Figure 1 and Figure 2 As shown, the display module 10 includes a display panel 11, a cover plate 12 disposed on the light-emitting side of the display panel 11, and a protective film 100 as described in the first aspect. The display panel 11 includes a fingerprint recognition area 11a, the first part 110 of the protective film 100 covers the cover plate 12, and the cutout area 110a is disposed opposite to the fingerprint recognition area 11a.

[0055] In this application, the first part 110 of the protective film 100 covers the cover plate 12, and the cutout area 110a is disposed opposite to the fingerprint recognition area 11a. The second part 120 is configured to be flipped relative to the first part 110 in a direction toward or away from the first part 110, so that the second part 120 covers or exposes the cutout area 110a. In this way, the cutout area 110a exposes the area on the cover plate 12 opposite to the fingerprint recognition area 11a of the display panel 11. When fingerprint detection is performed, the second part 120 is flipped relative to the first part 110 in a direction away from the first part 110, so that the second part 120 exposes the cutout area 110a. At this time, the detection fixture can be directly attached to the cover plate 12 through the cutout area 110a to detect the fingerprint recognition area 11a of the display panel 11, thereby improving the accuracy and reliability of fingerprint detection. After the fingerprint detection is completed, the second part 120 is flipped relative to the first part 110 in a direction toward the first part 110, so that the second part 120 covers the cutout area 110a. At this point, the second part 120 re-protects the cover plate 12. Throughout the process, the first part 110 remains attached to the cover plate 12, while only the second part 120 is flipped, avoiding the complete removal of the protective film 100. This helps reduce the probability of dirt and air bubbles forming on the protective film 100, thereby improving the protective effect of the protective film 100 on the display module 10. Furthermore, since only the second part 120 is flipped during the entire testing process, without removing the entire protective film 100, the protective film 100 can be reused without replacement, thus saving on processes and reducing production costs.

[0056] In some embodiments, such as Figure 1 As shown, the orthographic projection of the cutout area 110a onto the display panel 11 covers the fingerprint recognition area 11a. That is, the area of ​​the cutout area 110a is larger than the area of ​​the fingerprint recognition area 11a. Thus, during fingerprint function testing, firstly, the testing fixture can be directly attached to the cover plate 12 through the cutout area 110a to test the entire fingerprint recognition area 11a, thereby improving the accuracy and reliability of fingerprint detection. Secondly, because the area of ​​the cutout area 110a is larger than the area of ​​the fingerprint recognition area 11a, the probability of the fingerprint recognition area 11a being covered by the non-cutout area of ​​the first part 110 due to excessive adhesion error between the first part 110 and the cover plate 12 is reduced, further improving the ease of application of the protective film 100.

[0057] In some embodiments, such as Figure 1As shown, the display module 10 also includes a fingerprint recognition module 200, which is disposed on the side of the display panel 11 opposite to the cover plate 12. In the thickness direction of the display module 10, the fingerprint recognition module 200 is disposed opposite to the fingerprint recognition area 11a. In this embodiment, the fingerprint recognition module 200 is disposed on the side of the display panel 11 opposite to the cover plate 12. That is, this embodiment uses an under-display fingerprint recognition method, which helps to improve the screen-to-body ratio of the display module 10 to achieve a full-screen display.

[0058] In some embodiments, the fingerprint recognition module 200 includes an ultrasonic fingerprint recognition module and an optical fingerprint recognition module. The fingerprint recognition module of this application can be either of the two types described above, both of which can implement under-display fingerprint recognition functionality.

[0059] Preferably, in a specific embodiment, such as Figure 1 As shown, the fingerprint recognition module 200 is an ultrasonic fingerprint recognition module 210. The ultrasonic fingerprint recognition module 210 includes a thin-film transistor layer 211 and a piezoelectric layer 212 located between the display panel 11 and the thin-film transistor layer 211. The piezoelectric layer 212 is electrically connected to the thin-film transistor layer 211. The piezoelectric layer 212 is configured to emit and receive ultrasonic signals and convert the received ultrasonic signals into electrical signals for output, so as to form a fingerprint recognition image.

[0060] This embodiment presents a specific structure for the fingerprint recognition module 200 when it is an ultrasonic fingerprint recognition module 210. Compared to optical fingerprint recognition modules, the ultrasonic fingerprint recognition module 210 has better penetration and higher security, while also providing more stable and accurate fingerprint detection. The ultrasonic fingerprint recognition module 210 includes a thin-film transistor layer 211 and a piezoelectric layer 212. The thin-film transistor layer 211 includes multiple thin-film transistor circuits 2111 (TFTs). Its detection principle is as follows: the piezoelectric layer 212 emits ultrasonic signals. When a finger presses the area on the cover plate 12 opposite to the fingerprint recognition area 11a of the display panel 11, the ridges of the fingerprint directly contact the cover plate 12, while the valleys of the fingerprint are separated from the cover plate 12 by air with greater acoustic impedance. Therefore, when the ultrasonic signal is reflected from the finger surface, the intensity of the reflected ultrasonic waves differs between the valleys and ridges. These ultrasonic waves then act on the piezoelectric layer 212, causing it to convert the received ultrasonic signals into different voltage signals. Finally, these voltage signals are output to an external circuit and detected, thereby enabling fingerprint image recognition.

[0061] An embodiment of the third aspect of this application provides a display device including the display module 10 described in the second aspect. In this application, the display device uses the display module 10 described in the second aspect, thereby improving the accuracy and reliability of fingerprint detection, and enhancing the protective effect of the protective film 100 on the display module 10. The display device includes, but is not limited to, any product or component with a display function, such as a liquid crystal display device, electronic paper, OLED display device, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0062] An embodiment of the fourth aspect of this application provides a fingerprint recognition detection method, applied to the display module 10 described in the second aspect. For example... Figure 6 As shown, the detection methods for fingerprint recognition include:

[0063] The second part 120 is flipped relative to the first part 110 in a direction away from the first part 110, so that the second part 120 exposes the cutout area 110a;

[0064] The fingerprint recognition area 11a of the display panel 11 is inspected;

[0065] The second part 120 is flipped relative to the first part 110 in a direction toward the first part 110 so that the second part 120 covers the cutout area 110a.

[0066] In this application, throughout the fingerprint detection process, the first part 110 remains attached to the cover plate 12, while only the second part 120 is flipped. Firstly, the detection fixture can be directly attached to the cover plate 12 through the cutout area 110a to detect the fingerprint recognition area 11a of the display panel 11, thereby improving the accuracy and reliability of fingerprint detection. Secondly, it avoids completely removing the protective film 100, thus reducing the probability of dirt and air bubbles forming on the protective film 100, and improving the protective effect of the protective film 100 on the display module 10. Furthermore, by not removing the entire protective film 100 during the entire detection process, the protective film 100 can be reused without replacement, which also helps save on processes and reduce production costs.

[0067] 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.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A protective film applied to a display module, the display module comprising a display panel and a cover plate disposed on the light-emitting side of the display panel, the display panel including a fingerprint recognition area, characterized in that, The protective film includes a first part and a second part connected to the first part; The first part is used to cover the cover plate, and a hollow area is provided on the first part. When the first part is in contact with the cover plate, the hollow area is positioned opposite to the fingerprint recognition area. The second part is configured to flip relative to the first part in a direction toward or away from the first part, so that the second part covers or exposes the cutout area.

2. The protective film according to claim 1, characterized in that, The protective film also includes a tear-off section connected to the second part.

3. The protective film according to claim 1, characterized in that, The shape of the hollowed-out area can be rectangular or circular; And / or, the shape of the second part includes a rectangle or a circle.

4. The protective film according to claim 1, characterized in that, The second part is provided with a plurality of exhaust holes, which are arranged in multiple rows along the first direction and in multiple columns along the second direction, wherein the first direction and the second direction intersect.

5. A display module, characterized in that, It includes a display panel, a cover plate disposed on the light-emitting side of the display panel, and a protective film as described in any one of claims 1-4; The display panel includes a fingerprint recognition area, the first part covers the cover plate, and the cutout area is disposed opposite to the fingerprint recognition area.

6. The display module according to claim 5, characterized in that, The hollowed-out area's orthogonal projection onto the display panel covers the fingerprint recognition area.

7. The display module according to claim 5, characterized in that, The display module also includes a fingerprint recognition module, which is located on the side of the display panel away from the cover plate; In the thickness direction of the display module, the fingerprint recognition module is positioned opposite to the fingerprint recognition area.

8. The display module according to claim 7, characterized in that, The fingerprint recognition module includes an ultrasonic fingerprint recognition module and an optical fingerprint recognition module.

9. A display device, characterized in that, Includes the display module as described in any one of claims 5-8.

10. A method for detecting fingerprint recognition function, applied to a display module as described in any one of claims 5-8, characterized in that, include: The second part is flipped relative to the first part in a direction away from the first part, so that the second part exposes the hollow area; The fingerprint recognition area of ​​the display panel is detected; The second part is flipped relative to the first part in a direction toward the first part so that the second part covers the cutout area.

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