Display module and display device

Abstract

The invention discloses a display module and a display device. The display module comprises a display panel and a heat dissipation film, the heat dissipation film is attached to the back face, away from the light emitting face, of the display panel, and the heat dissipation film is provided with a fingerprint opening; the ultrasonic fingerprint module is positioned on the back surface of the display panel; the ultrasonic fingerprint module comprises a sensor and a first flexible circuit board, and the sensor is fixed in the fingerprint opening; the first flexible circuit board is connected with the side where the first side edge of the sensor is located; the first protection structure is arranged between the second side edge of the sensor and the edge of the fingerprint opening; wherein the second side edge is the side edge except the first side edge of the sensor; the first protection structure comprises a filling part, and the filling part is located in the fingerprint opening.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] In recent years, with the breakthrough of core technology and the reduction of manufacturing costs, the ultrasonic fingerprint recognition module industry has achieved rapid penetration from the high-end market to the mass consumer field and has been widely used in the OLED display industry.

[0003] In order to make a display module compatible with the detection areas of multiple ultrasonic fingerprint modules of different sizes and achieve the purpose of one display module corresponding to multiple terminal models, when designing the structure of the display module, the fingerprint opening of the heat dissipation film will be designed according to the larger detection area size, so as to be downward compatible with smaller sensing areas.

[0004] However, when the detection area is smaller than the fingerprint opening of the heat dissipation film, dirt, scratches and other defects may appear in the area of ​​the fingerprint opening that is not blocked by the ultrasonic fingerprint recognition module, thereby affecting the reliability test. Summary of the Invention

[0005] The embodiments of the present invention provide a display module and a display device to solve the above-mentioned technical problems existing in the prior art.

[0006] In a first aspect, to solve the above technical problems, an embodiment of the present invention provides a display module, comprising:

[0007] A display panel and a heat dissipation film; the heat dissipation film is attached to the back of the display panel away from the light-emitting surface, and the heat dissipation film has a fingerprint opening;

[0008] An ultrasonic fingerprint module is located on the back of the display panel; the ultrasonic fingerprint module includes a sensor and a first flexible circuit board, the sensor is fixed in the fingerprint opening; the first flexible circuit board is connected to the side where the first side edge of the sensor is located;

[0009] a first protective structure, disposed between a second side edge of the sensor and an edge of the fingerprint opening; wherein the second side edge is a side edge other than the first side edge of the sensor;

[0010] The first protection structure includes a filling portion, and the filling portion is located in the fingerprint opening.

[0011] In a possible implementation manner, the first protective structure further includes:

[0012] an extension portion connected to the filling portion and located outside the fingerprint opening;

[0013] The extension portion is bonded to the heat dissipation film.

[0014] In a possible implementation manner, the extension portion includes:

[0015] The first sub-extension portion and the second sub-extension portion are both located on the same side of the fingerprint opening as the first flexible circuit board;

[0016] The second sub-extension portion is located between the first flexible circuit board and the heat dissipation film, and is bonded to the first flexible circuit board.

[0017] In a possible implementation manner, the display module further includes:

[0018] Conductive double-sided tape, bonded between the second sub-extension portion and the metal layer of the heat dissipation film;

[0019] A double-sided adhesive tape is bonded between the second sub-extension portion and the first flexible circuit board.

[0020] In one possible implementation, the first protective structure includes:

[0021] elastic layer;

[0022] A conductive layer is provided on the surface of the elastic layer.

[0023] In a possible implementation manner, a distance from a surface of the filling portion away from the display panel to the display panel is greater than a distance from a surface of the sensor away from the display panel to the display panel.

[0024] In a possible implementation manner, in the direction in which the display panel points to the sensor, a height difference between a surface of the filling portion away from the display panel and a surface of the sensor away from the display panel is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0025] In a possible implementation manner, the first protective structure also covers the sensor.

[0026] In one possible implementation, a connector and a reinforcement structure are provided at an end of the first flexible circuit board away from the sensor; the connector is located on a side of the first flexible circuit board away from the heat dissipation film, the reinforcement structure is located on a side of the first flexible circuit board close to the heat dissipation film, and an orthographic projection of the connector on the reinforcement structure is within the range of the reinforcement structure;

[0027] The display module further includes a second flexible circuit board connected to the display panel; the second flexible circuit board includes a device area, and the reinforcement structure overlaps the device area;

[0028] The ultrasonic fingerprint module further includes a second protective structure, which is located on a side of the reinforcement structure away from the connector and is bonded to the reinforcement structure.

[0029] In one possible implementation manner, the second protective structure includes:

[0030] Buffer structure;

[0031] The traction structure is located between the buffer structure and the reinforcement structure and is bonded to the buffer structure.

[0032] In a possible implementation manner, the buffer structure includes:

[0033] A first adhesive layer, a foam layer and a second adhesive layer are stacked.

[0034] In one possible implementation, a ratio of the thickness of the buffer structure to the thickness of the traction structure in the first direction is greater than or equal to 3 and less than or equal to 6; wherein the first direction is the direction in which the display panel points to the ultrasonic fingerprint module;

[0035] A ratio of the length of the traction structure to the length of the buffer structure in the second direction is in a range of greater than or equal to 8 and less than or equal to 12; wherein the second direction is a direction perpendicular to the first side.

[0036] In a possible implementation manner, the material of the traction structure includes a polymer material.

[0037] In a possible implementation manner, a gap is provided between the first protective structure and the sensor;

[0038] The display module further includes: a first sealant filled in a gap between the first protection structure and the sensor.

[0039] In a possible implementation manner, a gap is provided between the first protection structure and an edge of the fingerprint opening;

[0040] The display module further includes: a second sealant filled in a gap between the first protection structure and an edge of the fingerprint opening.

[0041] In a second aspect, an embodiment of the present invention provides a display device, comprising the display module as described in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A partial top view of the back of a display module provided by an embodiment of the present invention;

[0043] Figure 2 and Figure 3FIG2 is a top view of an ultrasonic fingerprint module provided by an embodiment of the present invention;

[0044] Figure 4 A top view of a heat dissipation film provided by an embodiment of the present invention;

[0045] Figure 5 The embodiment of the present invention provides Figure 1 Cross-section along the AA' direction;

[0046] Figure 6 A partial top view of the back of another display module provided by an embodiment of the present invention;

[0047] Figure 7 A partial top view of the back of another display module provided by an embodiment of the present invention;

[0048] Figure 8 The embodiment of the present invention provides Figure 7 Cross-section along the middle BB' direction;

[0049] Figure 9 A schematic structural diagram of a first protective structure provided by an embodiment of the present invention;

[0050] Figure 10 A schematic structural diagram of another display module provided by an embodiment of the present invention;

[0051] Figure 11 A schematic structural diagram of a display module provided by an embodiment of the present invention;

[0052] Figure 12 This is a structural diagram of a display module in the related art;

[0053] Figure 13 A partial side view of the lower frame of a display module provided by an embodiment of the present invention;

[0054] Figure 14 FIG2 is a schematic diagram showing a bending state of a first flexible printed circuit board near a connector provided by an embodiment of the present invention;

[0055] Figure 15 A schematic structural diagram of a second protective structure provided by an embodiment of the present invention;

[0056] Figure 16 A schematic diagram of the thickness of each film layer in a second protective structure provided by an embodiment of the present invention;

[0057] Figure 17 A schematic structural diagram of another second protective structure provided by an embodiment of the present invention;

[0058] Figure 18A partial top view of a display module provided by an embodiment of the present invention;

[0059] Figure 19 The embodiment of the present invention provides Figure 18 A partial side view of the lower frame of the module is shown in FIG.

[0060] Reference numerals:

[0061] Display panel 1, heat dissipation film 2, fingerprint opening K, ultrasonic fingerprint module 3, sensor 31, first flexible circuit board 32, first side 31a, second side 31b, first protective structure 4, extension portion 41, filling portion 42, first sub-extension portion 411, second sub-extension portion 412, conductive double-sided adhesive 51, double-sided tape 52, elastic layer 4a, conductive layer 4b, pressure-sensitive adhesive 6, first sealant 7a, second sealant 7b, connector 321, reinforcement structure 322, second flexible circuit board 8, device area 8a, second protective structure 9, buffer structure 91, traction structure 92, first adhesive layer 911, foam layer 912, second adhesive layer 913. DETAILED DESCRIPTION

[0062] Embodiments of the present invention provide a display module and a display device to solve the above-mentioned technical problems existing in the prior art.

[0063] It should be understood that the specific structural and functional details disclosed in the embodiments of the present invention are merely representative and are for the purpose of describing exemplary embodiments of the present application. However, the present application can be implemented in many alternative forms or combinations and should not be construed as being limited to the embodiments described herein.

[0064] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, the term "including" and any variations thereof are intended to cover non-exclusive inclusions.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0066] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described below with reference to the accompanying drawings and examples. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all explained with reference to the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present invention. The drawings of the present invention are only used to illustrate the relative position relationship and do not represent the true proportion.

[0067] It should be noted that specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The subsequent description of the specification is a preferred embodiment of the present application, but the description is for the purpose of illustrating the general principles of the present application and is not intended to limit the scope of the present application. The scope of protection of the present application shall be determined as defined by the appended claims.

[0068] A display panel and a display device provided by embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0069] Please refer to Figure 1 A partial top view of the back of a display module provided in an embodiment of the present invention, the display module comprising:

[0070] Display panel 1 and heat dissipation film 2; the heat dissipation film 2 is attached to the back side of the display panel 1 away from the light emitting surface, and the heat dissipation film 2 has a fingerprint opening K;

[0071] The ultrasonic fingerprint module 3 is located on the back of the display panel 1. The ultrasonic fingerprint module 3 includes a sensor 31 and a first flexible circuit board 32. The sensor 31 is fixed in the fingerprint opening K. For example, the sensor 31 can be fixed in the fingerprint opening K by bonding to the back of the display panel 1, or by bonding to a portion of the film layer of the heat dissipation film 2. The first flexible circuit board 32 is connected to the side where the first side 31a of the sensor 31 is located.

[0072] The first protective structure 4 is provided between the second side 31b of the sensor 31 and the edge of the fingerprint opening K; wherein the second side 31b is the side other than the first side 31a of the sensor 31;

[0073] The first protection structure 4 includes a filling portion 42 , and the filling portion 42 is located in the fingerprint opening K.

[0074] The display module of the present invention is compatible with different ultrasonic fingerprint modules 3. Since the sizes of sensors 31 of different ultrasonic fingerprint modules 3 are usually different, such as Figure 2 and Figure 3 FIG. 1 is a top view of an ultrasonic fingerprint module provided by an embodiment of the present invention. Figure 2 and Figure 3 Shown are two different ultrasonic fingerprint modules 3. Figure 2 The sensor 31 of the ultrasonic fingerprint module 3 has a size of 6mm×6mm. Figure 3 The sensor 31 of the ultrasonic fingerprint module 3 shown has a size of 8 mm×8 mm.

[0075] To show module compatibility Figure 2 and Figure 3 Taking the ultrasonic fingerprint module 3 as an example, the size of the fingerprint opening K on the heat dissipation film 2 in the display module can be set to 10×10 mm, such as Figure 4 FIG2 is a top view of a heat dissipation film provided by an embodiment of the present invention. That is, the present invention sets the size of the fingerprint opening K on the heat dissipation film 2 to be larger than the maximum size of the sensor 31 in the ultrasonic fingerprint module 3 that needs to be compatible.

[0076] In some embodiments, the size of the fingerprint opening K ranges from 10 mm×10 mm to 15 mm×15 mm.

[0077] At present, the size of the sensor 31 of the ultrasonic fingerprint module 3 is generally 6mm×6mm~8mm×8mm. The present invention can be compatible with most ultrasonic fingerprint modules 3 currently available on the market by setting the size range of the fingerprint opening K to 10mm×10mm~15mm×15mm.

[0078] The material used for the first protective structure 4 can be foam.

[0079] Please continue to refer to Figure 1 The first protective structure 4 can be located in the fingerprint opening K, that is, the first protective structure 4 can be composed only of the filling portion 42. The filling portion 42 can have no contact with the ultrasonic fingerprint module 3 and the heat dissipation film 2, or can have complementary contact with one of the ultrasonic fingerprint module 3 and the heat dissipation film 2, or can have contact with both the ultrasonic fingerprint module 3 and the heat dissipation film 2. There is no specific limitation.

[0080] In the embodiment provided by the present invention, a first protective structure 4 is provided between the edge of the fingerprint opening K and the second side 31b of the sensor 31 of the ultrasonic fingerprint module 3. The first protective structure 4 includes a filling portion 42 filled in the fingerprint opening K. The filling portion 42 can be used to shield the area between the edge of the fingerprint opening K and the second side 31b of the sensor 31 of the ultrasonic fingerprint module 3, thereby preventing dirt from invading the display panel 1 and also preventing the display panel 1 from being scratched. This allows the display module to be compatible with a variety of ultrasonic fingerprint modules 3 without affecting the reliability test of the display module in subsequent processes.

[0081] Please refer to Figure 5 The embodiment of the present invention provides Figure 1 In the cross-sectional view along the AA' direction, the distance h1 from the side of the filling portion 42 away from the display panel 1 to the display panel 1 is greater than the distance h2 from the sensor 31 of the ultrasonic fingerprint module 3 to the display panel 1. In this way, when the entire machine is assembled, the opponent first contacts the first protective structure 4, thereby preventing the sensor 31 from being crushed by the opponent, thereby protecting the ultrasonic fingerprint module 3.

[0082] In some embodiments, the height difference (h1-h2) between the side of the filling portion 42 away from the display panel 1 and the side of the sensor 31 away from the display panel 1 in a natural state (i.e., the filling portion 42 is not compressed) is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0083] By making the height difference (h1-h2) between the side of the filling portion 42 away from the display panel 1 in the natural state and the side of the sensor 31 away from the display panel 1 greater than or equal to 0.5 mm and less than or equal to 1 mm, the side of the filling portion 42 away from the display panel 1 can be higher than the side of the sensor 31 away from the display panel 1 when the filling portion 42 is compressed to the limit, thereby effectively preventing the sensor 31 from being crushed by the opponent regardless of whether the filling portion 42 is in the natural state or the compressed state; at the same time, it can also reduce the impact on the thickness of the entire machine.

[0084] Please continue to refer to Figure 5 The distance d1 between the filling portion 42 and the sensor 31 is in the range of 0.1 mm to 0.2 mm, and the distance d2 between the first protective structure 4 and the edge of the fingerprint opening K is in the range of 0.35 mm to 0.8 mm. In this way, even if a certain deviation occurs due to installation errors when installing the filling portion 42, the filling portion 42 will not adhere to the sensor 31 or the heat dissipation film 2.

[0085] Please continue to refer to Figure 5 , the display module also includes:

[0086] A polarizer (POL), located on the side of the display panel 1 away from the heat dissipation film 2;

[0087] Optical Clear Adhesive (OCA), located on the side of the polarizer away from the display panel 1;

[0088] The cover glass (CG) is located on the side of the optically transparent adhesive away from the display panel 1 .

[0089] Please refer to Figure 6 A partial top view of the back of another display module provided by an embodiment of the present invention, wherein the first protective structure 4 further includes:

[0090] An extension portion 41 connected to the filling portion 42 and located outside the fingerprint opening K;

[0091] The extending portion 41 is bonded to the heat dissipation film 2 .

[0092] Figure 6 To facilitate observation of the extension portion 41 and the filling portion 42, only the end of the filling portion 42 close to the first flexible circuit board 32 extends outward. In fact, the edge of the filling portion 42 close to the edge of the fingerprint opening K can be extended outward. This can reduce or even eliminate the gap between the first protective structure 4 and the edge of the fingerprint opening K, thereby better preventing dirt from entering the display panel 1.

[0093] In some embodiments, the first protective structure 4 is conductive, and the first conductive structure can be conductive foam, so that the first protective structure 4 can be electrically connected to the heat dissipation film 2. During the electrostatic test, the static electricity in the area between the fingerprint opening K and the sensor 31 can be discharged through the first protective structure 4 to the heat dissipation film 2, thereby preventing static electricity from entering the display panel 1 from the fingerprint opening K and causing electrostatic damage to the display panel 1, thereby better improving the reliability of the display module.

[0094] Please refer to Figure 7 A partial top view of the back of another display module provided by an embodiment of the present invention, wherein the extension portion 41 includes:

[0095] The first sub-extension portion 411 and the second sub-extension portion 412 are both located on the same side of the fingerprint opening K as the first flexible circuit board 32 ;

[0096] The second sub-extension portion 412 is located between the first flexible circuit board 32 and the heat dissipation film 2 and is bonded to the first flexible circuit board 32 .

[0097] By disposing the second sub-extension 412 between the first flexible printed circuit board 32 and the heat dissipation film 2 and bonding the first flexible printed circuit board 32 to the second sub-extension 412, the first flexible printed circuit board 32 can be secured to the back of the heat dissipation film 2, thereby preventing the first flexible printed circuit board 32 from shaking and causing related problems. When the first protective structure 4 is conductive, the first protective structure 4 can both protect the display panel 1 from damage caused by static electricity and prevent the first flexible printed circuit board 32 from shaking.

[0098] Please refer to Figure 8 The embodiment of the present invention provides Figure 7 The cross-sectional view along the BB' direction shows that the module also includes:

[0099] The conductive double-sided tape 51 is bonded between the second sub-extension portion 412 and the metal layer of the heat dissipation film 2 (not shown in the figure); in addition, there is a conductive double-sided tape 51 bonded between the first sub-extension portion 411 ( Figure 8 (not shown) conductive double-sided tape is bonded so that the first sub-extension portion 411 can also be electrically connected to the metal layer of the heat dissipation film;

[0100] The double-sided tape 52 is bonded between the second sub-extension portion 412 and the first flexible circuit board 32 .

[0101] By bonding the conductive double-sided tape 51 between the second sub-extension 412 and the metal layer of the heat dissipation film 2, the second sub-extension 412 and the heat dissipation film 2 can be electrically connected and fixed, thereby allowing the first protective structure 4 to provide electrostatic protection for the area between the edge of the fingerprint opening K and the sensor 31. At the same time, by bonding the double-sided tape 52 between the second sub-extension 412 and the first flexible circuit board 32, the second sub-extension 412 and the first flexible circuit board 32 can be fixed without causing a short circuit on the circuits on the first flexible circuit board 32. Moreover, because both the conductive double-sided tape 51 and the double-sided tape 52 are adhesive, the first protective structure 4 does not need to be adhesive, thereby reducing the difficulty of manufacturing the first protective structure 4.

[0102] Please refer to Figure 9 A schematic structural diagram of a first protective structure provided by an embodiment of the present invention.

[0103] The first protective structure 4 includes:

[0104] elastic layer 4a;

[0105] Conductive layer 4b: The conductive layer 4b is provided on the surface of the elastic layer 4a.

[0106] The elastic layer can be made of foam, silicone, etc., and the conductive layer 4b can be made of conductive cloth, conductive glue, etc.

[0107] By configuring the first protective structure 4 to include an elastic layer 4 a and a conductive layer 4 b wrapping the elastic layer 4 a , the first protective structure 4 can be made conductive while being elastic.

[0108] Of course, the first protective structure 4 is non-conductive and can be formed by the elastic layer 4a.

[0109] Please refer to Figure 10 A schematic structural diagram of another display module provided in an embodiment of the present invention, wherein the display module further comprises:

[0110] The pressure-sensitive adhesive 6 is bonded between the sensor 31 and the display panel 1 .

[0111] By providing a pressure-sensitive adhesive 6 between the sensor 31 and the display panel 1 , the sensor 31 and the display panel 1 can be better adhered and fixed.

[0112] Please continue to refer to Figure 10 The filling portion 42 can also cover the sensor 31, thereby better protecting the sensor 31 and preventing the sensor 31 from being scratched.

[0113] Please refer to Figure 11 This is a schematic structural diagram of a display module provided by an embodiment of the present invention, wherein a gap is provided between the filling portion 42 and the sensor 31;

[0114] The display module further includes a first sealant 7 a filling the gap between the filling portion 42 and the sensor 31 .

[0115] By filling the first sealant 7a in the gap between the filling portion 42 and the sensor 31, only a small amount of the first sealant 7a needs to be applied during assembly to prevent the first sealant 7a from overflowing. At the same time, the presence of the first sealant 7a can also prevent dirt from entering the display panel 1, and it is also convenient to disassemble the sensor 31 during subsequent maintenance work, and it will not be difficult to disassemble due to excessive first sealant 7a.

[0116] Please continue to refer to Figure 11 , a gap is set between the filling portion 42 and the edge of the fingerprint opening K;

[0117] The display module further includes a second sealant 7 b filling the gap between the filling portion 42 and the edge of the fingerprint opening K.

[0118] By filling the second sealant 7b in the gap between the filling portion 42 and the edge of the fingerprint opening K, only a small amount of the second sealant 7b needs to be applied during assembly, thereby preventing the second sealant 7b from overflowing and preventing dirt from entering the display panel 1.

[0119] Please refer to Figure 12The first flexible circuit board 32 is provided with a connector 321 and a reinforcement structure 322 at one end away from the sensor 31. Figure 12 The connector 321 is located on the side of the first flexible circuit board 32 away from the heat dissipation film 2, the reinforcement structure 322 is located on the side of the first flexible circuit board 32 close to the heat dissipation film 2, and the orthographic projection of the connector 321 on the reinforcement structure 322 is located within the range of the reinforcement structure 322;

[0120] The display module further includes a second flexible circuit board 8 , which is connected to the display panel 1 ; the second flexible circuit board 8 includes a device area 8 a , and the reinforcement structure 322 overlaps with the device area 8 a .

[0121] The reinforcement structure 322 may be a metal sheet or a non-metal sheet with a certain strength, and there is no specific limitation.

[0122] like Figure 12 As shown, the reinforcement structure 322 provided on the connector 321 in the related art is placed on the device area 8 a of the second flexible circuit board 8 , which makes the reinforcement structure 322 easily damage the device area 8 a.

[0123] To solve the above problems, the present invention also improves the ultrasonic fingerprint module 3, please refer to Figure 13 This is a partial side view of the lower frame side of a display module provided by an embodiment of the present invention. The ultrasonic fingerprint module 3 also includes a second protective structure 9. The second protective structure 9 is located on a side of the reinforcement structure 322 away from the connector 321 and is bonded to the reinforcement structure 322.

[0124] The second protective structure 9 may be made of foam or other similar buffer materials, so that the device area 8 a will not be scratched even if the reinforcement structure 322 is squeezed or displaced.

[0125] By providing a second protective structure 9 on the side of the reinforcement structure 322 away from the connector 321 in the ultrasonic fingerprint module 3, the second protective structure 9 can avoid direct contact between the reinforcement structure 322 and the device area 8a, thereby effectively preventing the reinforcement structure 322 from damaging the device area 8a.

[0126] In addition, when assembling the whole machine, the connector 321 of the first flexible circuit board 32 needs to be buckled with the mainboard of the whole machine. The assembler needs to touch the reinforcement structure 322 to control the buckling of the connector 321 with the host, which will lead to poor buckling, such as Figure 14 FIG2 is a schematic diagram showing a first flexible printed circuit board bent near a connector according to an embodiment of the present invention.

[0127] In order to solve the above problems, the present invention makes further improvements to the second protective structure 9, please refer to Figure 15A schematic structural diagram of a second protective structure provided in an embodiment of the present invention, wherein the second protective structure 9 includes:

[0128] Buffer structure 91; In some embodiments, the reinforcement structure 322 can be set indented relative to the buffer structure 91 in the positive projection of the buffer structure 91 (as can be seen from the figure). Figure 13 The positional relationship between the second protective structure 9 and the reinforcement structure 322); In other embodiments, such as Figure 15 The buffer structure 91 is set indented relative to the edge of the reinforcement structure 322 in the orthographic projection of the reinforcement structure 322, so as to prevent the buffer structure 91 from affecting the surrounding components;

[0129] The traction structure 92 is located between the buffer structure 91 and the reinforcement structure 322 and is bonded to the buffer structure 91 .

[0130] The cushioning structure 91 can be made of foam or other elastic materials. The traction structure 92 can be made of a polymer material, such as polyethylene terephthalate (PET). This makes the traction structure 92 insulating, lightweight, and highly resilient. This allows assemblers to use the traction structure 92 to bend the reinforcement structure 322 without directly contacting the reinforcement structure 322, preventing poor fastening and preventing damage to nearby components.

[0131] Please refer to Figure 16 A schematic diagram of the thickness of each film layer in a second protective structure provided in an embodiment of the present invention, wherein the ratio (h4 / h3) of the thickness h4 of the buffer structure 91 to the thickness h3 of the traction structure 92 in a first direction (not shown) is greater than or equal to 3 and less than or equal to 6; wherein the first direction is the direction in which the display panel points toward the ultrasonic fingerprint module;

[0132] In the second direction (not shown), the ratio (L1 / L2) of the length L1 of the traction structure 92 to the length L2 of the buffer structure 91 is greater than or equal to 8 and less than or equal to 12; wherein the second direction is the first side ( Figure 16 (not shown) in a vertical direction. This makes it easier for assemblers to operate.

[0133] The thickness h4 of the buffer structure 91 is in the range of 0.3 to 0.6 mm. The length L1 of the traction structure 92 is in the range of 15 to 30 mm.

[0134] In some embodiments, the edge of the buffer structure 91 is indented relative to the edge of the reinforcement structure 322 by 0.1 to 0.2 mm, which can reduce the impact of the buffer structure 91 on the surrounding components of the reinforcement structure 322 while protecting the opponent components of the reinforcement structure 322.

[0135] Please refer to Figure 17 A schematic structural diagram of another second protection structure provided by an embodiment of the present invention.

[0136] The buffer structure 91 includes:

[0137] A first adhesive layer 911 , a foam layer 912 and a second adhesive layer 913 are stacked.

[0138] The materials of the first adhesive layer 911 and the second adhesive layer 913 both include double-sided tape 52 , glue, and the like.

[0139] Please refer to 18- Figure 19 , Figure 18 A partial top view of a display module provided by an embodiment of the present invention, Figure 19 The embodiment of the present invention provides Figure 18 During the assembly process, the assembler can use the traction structure 92 to bend the reinforcement structure 322, thereby facilitating the connection of the connector 321 to the host computer and preventing the assembler from directly contacting the reinforcement structure 322 during assembly, which could result in a poor connection.

[0140] By configuring the buffer structure 91 to include a first adhesive layer 911 , a foam layer 912 , and a second adhesive layer 913 that are stacked, the buffer structure 91 can be made elastic and easy to assemble.

[0141] It should be noted that the aforementioned Figure 1 、 Figure 6 、 Figure 7 For ease of observation, the second flexible circuit board 8 connected to the display panel 1 is not shown.

[0142] Based on the same inventive concept, an embodiment of the present invention provides a display device, which includes the display module as described above.

[0143] The display device can be a liquid crystal display, an OLED display, a QLED display, or other display device, or a mobile device such as a mobile phone, tablet computer, notebook computer, personal digital assistant (PDA), or car computer. The display device includes a frame, a display panel disposed within the frame, a circuit board, a display driver IC, and other electronic components.

[0144] The display panel can be: a liquid crystal display panel (Liquid Crystal Display, LCD), an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel, a quantum dot light emitting diode (Quantum Dot Light Emitting Diodes, QLED) display panel, a micro light emitting diode (MicroLightEmitting Diodes, Micro LED) display panel, etc., and the present invention does not make specific limitations on this.

[0145] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0146] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A display module, wherein: include: A display panel and a heat dissipation film; the heat dissipation film is attached to the back of the display panel away from the light-emitting surface, and the heat dissipation film has a fingerprint opening; An ultrasonic fingerprint module is located on the back of the display panel; the ultrasonic fingerprint module includes a sensor and a first flexible circuit board, the sensor is fixed in the fingerprint opening; the first flexible circuit board is connected to the side where the first side edge of the sensor is located; a first protective structure, disposed between a second side edge of the sensor and an edge of the fingerprint opening; wherein the second side edge is a side edge other than the first side edge of the sensor; The first protection structure includes a filling portion, and the filling portion is located in the fingerprint opening.

2. The display module according to claim 1, wherein: The first protective structure further includes: an extension portion connected to the filling portion and located outside the fingerprint opening; The extension portion is bonded to the heat dissipation film.

3. The display module according to claim 2, wherein: The extension portion comprises: The first sub-extension portion and the second sub-extension portion are both located on the same side of the fingerprint opening as the first flexible circuit board; The second sub-extension portion is located between the first flexible circuit board and the heat dissipation film, and is bonded to the first flexible circuit board.

4. The display module according to claim 3, wherein: The display module further includes: Conductive double-sided tape, bonded between the second sub-extension portion and the metal layer of the heat dissipation film; A double-sided adhesive tape is bonded between the second sub-extension portion and the first flexible circuit board.

5. The display module according to any one of claims 1 to 4, wherein: The first protection structure includes: elastic layer; A conductive layer is provided on the surface of the elastic layer.

6. The display module according to any one of claims 1 to 5, wherein: A distance from a surface of the filling portion away from the display panel to the display panel is greater than a distance from a surface of the sensor away from the display panel to the display panel.

7. The display module according to claim 6, wherein: In the direction in which the display panel points toward the sensor, a height difference between a surface of the filling portion away from the display panel and a surface of the sensor away from the display panel is greater than or equal to 0.5 mm and less than or equal to 1 mm.

8. The display module according to any one of claims 1 to 7, wherein: The first protective structure also covers the sensor.

9. The display module according to any one of claims 1 to 8, wherein: A connector and a reinforcement structure are provided at one end of the first flexible circuit board away from the sensor; the connector is located on a side of the first flexible circuit board away from the heat dissipation film, the reinforcement structure is located on a side of the first flexible circuit board close to the heat dissipation film, and the orthographic projection of the connector on the reinforcement structure is within the range of the reinforcement structure; The display module further includes a second flexible circuit board connected to the display panel; the second flexible circuit board includes a device area, and the reinforcement structure overlaps the device area; The ultrasonic fingerprint module further includes a second protective structure, which is located on a side of the reinforcement structure away from the connector and is bonded to the reinforcement structure.

10. The display module according to claim 9, wherein: The second protective structure comprises: Buffer structure; The traction structure is located between the buffer structure and the reinforcement structure and is bonded to the buffer structure.

11. The display module according to claim 10, wherein: The buffer structure comprises: A first adhesive layer, a foam layer and a second adhesive layer are stacked.

12. The display module according to claim 11, wherein: A ratio of the thickness of the buffer structure to the thickness of the traction structure in a first direction is greater than or equal to 3 and less than or equal to 6; wherein the first direction is a direction in which the display panel points to the ultrasonic fingerprint module; A ratio of the length of the traction structure to the length of the buffer structure in the second direction is in a range of greater than or equal to 8 and less than or equal to 12; wherein the second direction is a direction perpendicular to the first side.

13. The display module according to claim 11, wherein: The material of the traction structure includes polymer material.

14. The display module according to any one of claims 1 to 13, wherein: A gap is set between the first protective structure and the sensor; The display module further includes: a first sealant filled in a gap between the first protection structure and the sensor.

15. The display module according to any one of claims 1 to 14, wherein: A gap is set between the first protective structure and the edge of the fingerprint opening; The display module further includes: a second sealant filled in a gap between the first protection structure and an edge of the fingerprint opening.

16. A display device, wherein: Comprising the display module according to any one of claims 1-15.

Images