Display module and electronic equipment

Abstract

The embodiment of the invention provides a display module and electronic equipment, relates to the technical field of intelligent wearing, and is used for solving the problem that the size of the electronic equipment is relatively large. In the display module, a supporting sheet is arranged on the back surface of a display screen, and the supporting sheet is connected with the display screen. The piezoelectric vibration piece is connected with the surface, away from the display screen, of the supporting piece. The vertical projection of the piezoelectric vibration piece on the back face of the display screen is located in the vertical projection range of the supporting piece on the back face of the display screen. And the piezoelectric vibrating reed drives the display screen to vibrate to realize screen sounding, so that the functions of sounding devices such as a loudspeaker, a buzzer and a sonar module can be realized. Sound production devices such as a loudspeaker, a buzzer and a sonar module do not need to be arranged in the electronic equipment, and the internal space of the electronic equipment can be saved.

Description

Technical Field

[0001] The present application relates to the field of smart wearable technology, and in particular to a display module and an electronic device. Background Art

[0002] As users have higher and higher requirements for the functionality and portability of electronic devices, these electronic devices need to be equipped with more electronic components within a limited layout space to achieve diversified functions while also meeting the design requirements of lightweight and miniaturization. For example, in order to meet user needs, these electronic devices may usually include sound-generating devices such as speakers, buzzers, or sonar modules. These sound-generating devices are large in size, thus occupying a large space inside the electronic device, which is not conducive to the development trend of miniaturization and lightweight electronic devices. Summary of the Invention

[0003] The present application provides a display module and an electronic device, which are used to solve the problem of large size of electronic devices.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] In one aspect of the present application, a display module is provided, which may include a display screen, a support sheet, and at least one piezoelectric vibrating sheet. The support sheet is disposed on the back of the display screen and is connected to the display screen. The piezoelectric vibrating sheet is disposed on a side of the support sheet facing away from the display screen and is connected to the support sheet. The piezoelectric vibrating sheet is used to drive the display screen to vibrate in the thickness direction of the display screen. The vertical projection of the piezoelectric vibrating sheet on the back of the display screen is within the vertical projection of the support sheet on the back of the display screen.

[0006] In summary, on the one hand, since the piezoelectric vibrating plate can drive the display screen to vibrate in the thickness direction of the display screen, the display screen can act as a diaphragm and achieve screen sound under the drive of the piezoelectric vibrating plate. In this case, the screen sound can realize the functions of a speaker such as making calls, playing music, and voice broadcasting, as well as the function of a buzzer that emits a buzzing sound. In addition, when the user wears the electronic device underwater, for example, when the user is diving underwater, the screen sound can use sound waves to communicate text, pictures, voice, etc. underwater, thereby realizing the function of a sonar module. In this way, the electronic device does not need to be equipped with a speaker, buzzer, sonar module, or other sound-generating devices, thereby saving internal space of the electronic device and facilitating the design trend of ultra-thin and miniaturized electronic devices. On the other hand, a support plate is provided between the piezoelectric vibrating plate and the display screen, and the piezoelectric vibrating plate is connected to the back of the display screen. In addition, the vertical projection of the piezoelectric vibrating plate on the back of the display screen is located within the vertical projection range of the support plate on the back of the display screen, so that the surface of the piezoelectric vibrating plate facing the display screen can be completely covered by the support plate. In this way, the entire piezoelectric vibrating plate can be supported by the supporting plate, and the supporting plate can provide a flat supporting surface for the piezoelectric supporting plate, which is conducive to transmitting the vibration of the piezoelectric vibrating plate to the display screen and improving the sound effect of the screen.

[0007] In an optional embodiment, the piezoelectric vibrating plate is directly bonded to the support plate, meaning no additional film layers are required between the two plates, other than the adhesive layer. This avoids the problem of vibration dampening caused by inserting vibration-absorbing components, such as foam, between the piezoelectric vibrating plate and the display.

[0008] In an optional embodiment, the above-mentioned support sheet is made of shading material, such as at least one of a resin or metal with a shading effect, so that the support sheet has a shading effect, so that the support sheet can replace the foam, that is, the position where the foam is originally required in the electronic device is covered with the above-mentioned support sheet, thereby increasing the area of ​​the support sheet, which is conducive to increasing the area of ​​the piezoelectric vibration sheet.

[0009] In an optional embodiment, the display module further includes an electrical connection portion, which is electrically connected to the display screen and is bent to the side of the support sheet facing away from the display screen. The electrical connection portion can be electrically connected to a mainboard provided with a processor (e.g., an MCU), thereby being able to receive control signals output from the processor on the mainboard. The electrical connection portion has a third vertical projection on the display screen, and the third vertical projection overlaps with the second vertical projection of the support sheet on the display screen. In this way, the electrical connection portion and the support sheet can be stacked, which can effectively improve the space utilization of the electronic device.

[0010] In one optional embodiment, the support sheet covers the entire back of the display screen. This allows, within manufacturing and installation tolerances, the vertical projection of the support sheet on the display surface of the electronic device to completely overlap with the vertical projection of the display screen on the display surface. In this case, the shape of the support sheet can be identical or approximately identical to the shape and size of the display screen. In this case, the area of ​​the display screen covered by the support sheet can be maximized, or nearly maximized, thereby providing a larger support area for the piezoelectric vibrating plate, thereby increasing the area of ​​the piezoelectric vibrating plate.

[0011] In an optional embodiment, the electrical connection portion has a third vertical projection on the display screen, and this third vertical projection does not overlap with the first vertical projection of the piezoelectric vibrating plate on the display screen. This prevents interference between the piezoelectric vibrating plate's location and the electrical connection portion's location. For example, the piezoelectric vibrating plate can be positioned on the entire back surface of the support plate, excluding the area where the electrical connection portion is located. This effectively increases the piezoelectric vibrating plate's coverage area and enhances the sound quality of the screen.

[0012] In one optional embodiment, the back of the display screen has a first region and a second region, the sum of the areas of the first and second regions being equal to the area of ​​the back of the display screen. The piezoelectric vibrating plate covers the entire first region, and the electrical connection portion is located in the second region. Thus, when the area of ​​the second region is reduced, the area of ​​the first region can be increased, thereby increasing the area of ​​the piezoelectric vibrating plate within the first region within the plane of the display surface. As can be seen from the above, when the area of ​​the piezoelectric vibrating plate within the plane of the display surface is increased, the effect of the piezoelectric vibrating plate driving the display screen to achieve screen sound can be effectively improved.

[0013] In one optional embodiment, the back of the display screen has a first region and a second region, the sum of the areas of the first and second regions being equal to the area of ​​the back of the display screen. The electrical connection portion is located in the second region, and the display module includes a plurality of piezoelectric vibrating plates, which are spaced apart in the first region. Similarly, when the area of ​​the second region is reduced, the area of ​​the first region can be increased, thereby increasing the number of piezoelectric vibrating plates located in the first region, effectively improving the effect of the piezoelectric vibrating plates driving the display screen to generate screen sound.

[0014] In an optional embodiment, the back of the display screen has a first area, a second area, and a third area, and the sum of the areas of the first area, the second area, and at least one third area is the same as the area of ​​the back of the display screen. The first area and the second area are arranged along the first direction; the second area and the third area are arranged along the second direction, the first direction and the second direction are different, and the first direction and the second direction are parallel to the back of the display screen. The electrical connection portion is located in the second area. In addition, at least one piezoelectric vibration plate includes a first piezoelectric vibration plate and a second piezoelectric vibration plate. The first piezoelectric vibration plate covers the entire first area, and the second piezoelectric vibration plate is located in the third area. In this way, a piezoelectric vibration plate, such as the above-mentioned second piezoelectric vibration plate, can be set on at least one of the left and right sides of the second area where the electrical connection portion is located, thereby increasing the number of piezoelectric vibration plates and the contact area between the piezoelectric vibration plate and the display screen, thereby achieving the purpose of improving the sound effect of driving the screen.

[0015] In one optional embodiment, the piezoelectric vibrating plate covers the entire surface of the support plate facing away from the display screen, with the electrical connection located on the side of the piezoelectric vibrating plate facing away from the support plate. This approach can approximately maximize the area of ​​the piezoelectric vibrating plate. For example, within the permitted manufacturing and installation tolerances, the area of ​​the piezoelectric vibrating plate and the support plate can be the same as the area of ​​the back of the display screen, thereby improving the sound quality of the screen.

[0016] In an optional embodiment, the display module further includes an electrical connection portion electrically connected to the display screen, the electrical connection portion being bent to the side of the support sheet facing away from the display screen. The electrical connection portion has a third vertical projection on the display screen, and the third vertical projection does not overlap with the second vertical projection of the support sheet on the display screen. This ensures that the support sheet and piezoelectric vibrating plate are positioned so as not to interfere with the electrical connection portion.

[0017] In one optional embodiment, the electrical connection portion includes a bent portion and a non-bent portion, wherein a first end of the bent portion is electrically connected to the display screen, and a second end of the bent portion is bent toward the back side of the display screen. The non-bent portion is electrically connected to the second end of the bent portion, and the non-bent portion is disposed on the back side of the display screen. After the bent portion is bent, the non-bent portion electrically connected to the bent portion is disposed toward the back side of the display screen, thereby enabling the non-bent portion to be electrically connected to the motherboard on which the processor is disposed.

[0018] In one optional embodiment, the electrical connection portion is a first circuit board. In this case, the bending portion and the non-bending portion are connected to form an integral structure, and the first circuit board is a flexible and rigid circuit board. A portion of the first circuit board is formed from a flexible material, which constitutes the bending portion, while another portion of the first circuit board is formed from a rigid material. Alternatively, the non-bending portion is a second circuit board, which may be a flexible circuit board or a printed circuit board, and the non-bending portion and the bending portion are separate components.

[0019] In one optional embodiment, the non-bending portion is a second circuit board. The bending portion has a fourth vertical projection on the display screen, and the fourth vertical projection is within the range of the non-bending portion's fifth vertical projection on the display screen. This allows the bending portion and the non-bending portion to be stacked, allowing a portion of their area to overlap, thereby reducing the area occupied by the bending portion and the non-bending portion parallel to the plane of the display screen, thereby improving the internal space utilization of the electronic device.

[0020] In an optional embodiment, the bending portion has a first end facing the display screen and a second end facing away from the display screen, and the first end is connected to the display screen. The non-bending portion has an electrical connection end and a non-electrical connection end. Relative to the electrical connection end, the non-electrical connection end is arranged close to the display screen, and the electrical connection end is electrically connected to the second end of the bending portion. For example, the electrical connection end of the non-bending portion may be the location of the gold finger in the non-bending portion. In this way, the non-bending portion can be reversely bound to the bending portion, so that the non-electrical connection end of the non-bending portion is arranged closer to the display screen relative to the electrical connection end. Compared with the forward binding method of extending the non-electrical connection end of the non-bending portion out of the bending portion, the reverse binding method can make the overlapping area between the non-bending portion and the bending portion larger, thereby being more conducive to improving the utilization rate of the internal space of the electronic device.

[0021] In an optional embodiment, a avoidance hole is provided on the non-bending portion, and the avoidance hole passes through the non-bending portion. In addition, the display module also includes a display driver chip and at least one electronic component. The display driver chip is arranged on the bending portion and is electrically connected to the display screen. The display driver chip is arranged in the avoidance hole. At least one electronic component is arranged on the non-bending portion, and the electronic component is electrically connected to the non-bending portion and the display driver chip. The display driver chip has a sixth vertical projection on the bending portion, and the sixth vertical projection and the seventh vertical projection of the electronic component on the bending portion do not overlap. In this case, when the bending portion and the non-bending portion are stacked, the display driver chip electrically connected to the bending portion can be arranged in the avoidance hole, thereby avoiding positional interference between the display driver chip and the non-bending portion.

[0022] In an optional embodiment, the vertical projection of the piezoelectric vibrating plate on the supporting plate is in the shape of a ring, a circle or a rectangle. The supporting plate does not need to cover the entire back of the display screen.

[0023] In one optional embodiment, the support sheet includes a flexible substrate and an NFC coil. The NFC coil is disposed within the flexible substrate. This eliminates the need for a separate NFC coil; the flexible substrate with the NFC coil and the support sheet can be shared, thereby reducing the number of components within the electronic device, simplifying the internal structure, and optimizing the size of the electronic device.

[0024] In an optional embodiment, when the electronic device does not need to have the NFC function, or the NFC coil is set at another location, the above-mentioned support sheet can be a resin substrate or a metal substrate.

[0025] Another aspect of the present application provides a display module comprising a display screen and a piezoelectric vibrating plate. The piezoelectric vibrating plate is disposed on the back of the display screen and connected to the display screen. The piezoelectric vibrating plate is configured to drive the display screen to vibrate along its thickness. This allows the piezoelectric vibrating plate to drive the display screen to vibrate along its thickness. The display screen can then function as a diaphragm, driven by the piezoelectric vibrating plate, to generate screen sound, replacing the functions of a speaker, buzzer, or sonar module.

[0026] In an optional embodiment, the display module further includes an electrical connection portion electrically connected to the display screen, the electrical connection portion being bent to a side of the support sheet facing away from the display screen. The electrical connection portion has a third vertical projection on the display screen, and the third vertical projection overlaps with the second vertical projection of the piezoelectric vibrating plate on the display screen, or the third vertical projection does not overlap with the second vertical projection of the piezoelectric vibrating plate on the display screen. The technical effects of the electrical connection portion are the same as those described above and are not further elaborated here.

[0027] In one optional embodiment, the electrical connection portion includes a bent portion and a non-bent portion, wherein the first end of the bent portion is electrically connected to the display screen, and the second end of the bent portion is bent toward the back side of the display screen. The non-bent portion is electrically connected to the second end of the bent portion and is disposed on the back side of the display screen. The technical effects of the bent portion and the non-bent portion are the same as those described above and will not be further elaborated here.

[0028] In an optional embodiment, the non-bending portion is a second circuit board. The bending portion has a fourth vertical projection on the display screen, and the fourth vertical projection is within the range of the non-bending portion's fifth vertical projection on the display screen. In this manner, the bending portion and the non-bending portion can be stacked. The technical effects of this stacking arrangement are the same as those described above and will not be further elaborated here.

[0029] In an optional embodiment, the bending portion has a first end facing the display screen and a second end facing away from the display screen, and the first end is connected to the display screen. The non-bending portion has an electrical connection end and a non-electrical connection end. Relative to the electrical connection end, the non-electrical connection end is arranged close to the display screen, and the electrical connection end is electrically connected to the second end of the bending portion. For example, the electrical connection end of the non-bending portion can be the location of the gold finger in the non-bending portion. In this way, the non-bending portion can be reversely bound to the bending portion. The technical effect of the reverse binding is the same as described above and will not be repeated here.

[0030] In an optional embodiment, an avoidance hole is provided on the non-bending portion, and the avoidance hole passes through the non-bending portion. In addition, the display module also includes a display driver chip and at least one electronic component. The display driver chip is arranged on the bending portion and is electrically connected to the display screen. The display driver chip is arranged in the avoidance hole. At least one electronic component is arranged on the non-bending portion, and the electronic component is electrically connected to the non-bending portion and the display driver chip. The display driver chip has a sixth vertical projection on the bending portion, and the sixth vertical projection and the seventh vertical projection of the electronic component on the bending portion do not overlap. The technical effect of the avoidance hole is the same as described above and will not be repeated here.

[0031] In an optional embodiment, the vertical projection of the piezoelectric vibrating plate on the supporting plate is in the shape of a ring, a circle or a rectangle. The supporting plate does not need to cover the entire back of the display screen.

[0032] In one optional embodiment, the support sheet includes a flexible substrate and an NFC coil. The NFC coil is disposed within the flexible substrate. This eliminates the need for a separate NFC coil; the flexible substrate with the NFC coil and the support sheet can be shared, thereby reducing the number of components within the electronic device, simplifying the internal structure, and optimizing the size of the electronic device.

[0033] In an optional embodiment, when the electronic device does not need to have the NFC function, or the NFC coil is set at another location, the above-mentioned support sheet can be a resin substrate or a metal substrate.

[0034] Another aspect of the present application provides an electronic device comprising a middle frame and any one of the display modules described above, wherein the display module is disposed within the middle frame. The electronic device has the same technical effects as the display module provided in the aforementioned embodiment, and will not be described in detail here.

[0035] In an optional embodiment, the electronic device further includes a rear housing connected to the midframe and defining an installation space. The display module further includes an electrical connector electrically connected to the display screen of the display module. The electrical connector is bent to the back of the display screen and located within the installation space to prevent the electrical connector from being exposed. Furthermore, the display screen's display surface is exposed on the side of the midframe facing away from the rear housing for image display. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0037] Figure 2 for Figure 1 An exploded diagram of an electronic device;

[0038] Figure 3 for Figure 2 An exploded schematic diagram of the module is shown in the figure;

[0039] Figure 4 A control circuit diagram for driving a piezoelectric vibrating piece to vibrate in an electronic device provided in an embodiment of the present application;

[0040] Figure 5 for Figure 4 Schematic diagram of the voltage provided by the driving circuit to the piezoelectric vibrating piece;

[0041] Figure 6 (a) Figure 6 (b) Figure 6 (c) in the figure respectively represent different vibration states of the piezoelectric vibrating piece provided in the embodiments of the present application;

[0042] Figure 7 This is a schematic structural diagram of an electronic device provided with foam in the related art;

[0043] Figure 8 A schematic diagram of the structure of the display screen and the electrical connection part provided in an embodiment of the present application;

[0044] Figure 9 A schematic diagram of a packaging method for a display screen provided in an embodiment of the present application;

[0045] Figure 10A A schematic diagram of another packaging method for a display screen provided in an embodiment of the present application;

[0046] Figure 10B A schematic diagram of another packaging method for a display screen provided in an embodiment of the present application;

[0047] Figure 11 A schematic diagram of the electrical connection between the display screen and the electrical connection portion provided in an embodiment of the present application;

[0048] Figure 12 for Figure 11 The bent portion of the electrical connection portion in the structure shown is a schematic diagram before being bent;

[0049] Figure 13 An exploded schematic diagram of a display module provided in an embodiment of the present application;

[0050] Figure 14 A schematic structural diagram of a support sheet provided in an embodiment of the present application;

[0051] Figure 15 A schematic structural diagram of a display module with a support sheet provided in an embodiment of the present application;

[0052] Figure 16 for Figure 15 A schematic diagram of a structure in which the bending portion and the non-bending portion are arranged on the back of the display screen;

[0053] Figure 17 A schematic diagram of the structure of a display module with a piezoelectric vibrating piece provided in an embodiment of the present application;

[0054] Figure 18 A schematic structural diagram of another electronic device provided in an embodiment of the present application;

[0055] Figure 19A For the Figure 17 A schematic diagram of a top view structure obtained from the A direction in FIG;

[0056] Figure 19B A schematic diagram of an electronic device transmitting signals underwater provided by an embodiment of the present application;

[0057] Figure 20 For the Figure 17 Another schematic diagram of a top view structure obtained from the A direction in FIG;

[0058] Figure 21 A schematic structural diagram of another electronic device provided in an embodiment of the present application;

[0059] Figure 22 A schematic structural diagram of another electronic device provided in an embodiment of the present application;

[0060] Figure 23 A schematic structural diagram of another electronic device provided in an embodiment of the present application;

[0061] Figure 24 A schematic structural diagram of a display module provided in an embodiment of the present application;

[0062] Figure 25 A schematic structural diagram of another display module provided in an embodiment of the present application;

[0063] Figure 26A A schematic structural diagram of another display module provided in an embodiment of the present application;

[0064] Figure 26B A schematic structural diagram of another display module provided in an embodiment of the present application;

[0065] Figure 26C A schematic structural diagram of another display module provided in an embodiment of the present application;

[0066] Figure 27 An exploded schematic diagram of another display module provided in an embodiment of the present application;

[0067] Figure 28 An exploded schematic diagram of another display module provided in an embodiment of the present application;

[0068] Figure 29 An exploded schematic diagram of another display module provided in an embodiment of the present application;

[0069] Figure 30 A schematic structural diagram of another display module provided in an embodiment of the present application.

[0070] Reference numerals:

[0071] 01-electronic device; 10-display module; 11-middle frame; 12-back cover; 101-display screen; 102-support plate; 103-piezoelectric vibration plate; 200-driving circuit; 201-processor; 40-electronic components; 50-foam; 101-display screen; 110-electrical connection part; 111-bending part; 300-display driver chip; 301-non-bending part; 3011-avoidance hole; 1021-flexible substrate; 1022-NFC coil; 601-first area; 602-second area; 603-third area; 1031-first piezoelectric vibration plate; 1032-second piezoelectric vibration plate. DETAILED DESCRIPTION

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0073] In the following, the terms "first," "second," etc., are used for descriptive convenience only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," etc. 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.

[0074] In this application, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integral connection; or, "connection" can be a direct connection or an indirect connection through an intermediate medium. In addition, "transmission connection" refers to a connection relationship that can achieve mechanical transmission, such as rotation, movement, and other movements. This "transmission connection" includes but is not limited to fixed mechanical connections, detachable connections (e.g., snap connections, threaded connections), and surface contact abutment and meshing.

[0075] In addition, unless otherwise clearly specified and limited, the term "electrical connection" should be understood in a broad sense. For example, "electrical connection" can be a direct electrical connection, for example, physical contact and electrical conduction between two components. It can also be understood as the electrical connection between different components in the circuit structure through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals to transmit electrical signals; or, "electrical connection" can be an indirect electrical connection between two components through an intermediate medium; or, "electrical connection" can be an electrical connection between two components in an air / non-contact manner, for example, two components are electrically connected by capacitive coupling to transmit electrical signals.

[0076] "Communication connection" can refer to the transmission of electrical signals, including wireless communication connections and wired communication connections. Wireless communication connections do not require physical media and do not constitute a connection relationship that limits the product structure.

[0077] In the embodiments of the present application, the descriptions "vertical" and "parallel" respectively indicate approximately vertical and approximately parallel within a certain error range, and the error range may be a range in which the deviation angle relative to absolute vertical and absolute parallel is less than or equal to 5°, 8° or 10°, respectively, and no specific limitation is made here.

[0078] In the embodiments of the present application, directional terms such as "up", "down", "left" and "right" may be defined including but not limited to the orientation relative to the components schematically placed in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative description and clarification, and may change accordingly according to changes in the orientation of the components in the drawings.

[0079] In the drawings of the embodiments of the present application, components are represented only by guide lines; hollow structures such as openings and holes are represented by guide lines with wavy lines at the ends.

[0080] An embodiment of the present application provides an electronic device having a display function. The electronic device can be applied to various communication systems or communication protocols, such as Bluetooth (BT) communication technology, global positioning system (GPS) communication technology, global system of mobile communication (GSM) communication technology, wireless fidelity (WiFi) communication technology, wideband code division multiple access wireless (WCDMA) communication technology, long term evolution (LTE), 5G communication technology, and other future communication technologies.

[0081] The electronic device in the embodiments of the present application may be a mobile phone, a tablet computer (pad), a laptop computer, a smart home, a smart wearable device (e.g., a smart watch, a smart bracelet, smart glasses, a smart helmet), a virtual reality (VR) electronic device, an augmented reality (AR) electronic device, etc. The electronic device may also be a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, an electronic device in a 5G network, or an electronic device in a future-evolved public land mobile network (PLMN), etc., and the embodiments of the present application are not limited thereto.

[0082] For the sake of convenience, the following examples are all based on the electronic device 01. Figure 1 The electronic device 01 may include a display module 10 and a middle frame 11, and the middle frame 11 can support the display module 10. Figure 2 (for Figure 1 As shown in the exploded view of the electronic device, the electronic device 01 may further include a rear shell 12 connected to the middle frame 11.

[0083] For ease of explanation, an XYZ coordinate system is established in the accompanying drawings. The Z direction corresponds to the thickness of the electronic device 01, i.e., the stacking direction of the display module 10, the middle frame 11, and the rear cover 12. The XY plane formed by the X and Y directions is parallel to the display surface of the display module 10. Furthermore, the accompanying drawings illustrate the case where the electronic device 01 is a smartwatch, and the vertical projection of the display module 10 on the XY plane is a circle.

[0084] In other embodiments of the present application, the vertical projection of the display module 10 on the XY plane can also be other regular shapes, such as rectangles, polygons, etc., or irregular shapes, which are not limited in this application. In this case, the contours of the middle frame 11 and the rear housing 12 match the contours of the display module 10.

[0085] The electronic device 01 may further include a processor electrically connected to the display module 10. The processor may be disposed on a side of the middle frame 11 away from the display module 10. The rear housing 12 is buckled onto the middle frame 11, thereby forming an installation space between the rear housing 12 and the middle frame 11 ( Figure 2 (not shown) for accommodating the above-mentioned processor, battery and other devices.

[0086] The processor can provide display data to the display module 10 to drive the display module 10 to display images. For example, the processor may include one or more processing units, for example, the processor may include a central processing unit (CPU), a microcontroller unit (MCU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU). Among them, different processing units can be independent devices or integrated into one or more processors.

[0087] In addition, the electronic device 01 may further include a mainboard carrying the processor, such as a printed circuit board (PCB), and an external memory interface electrically connected to the processor, an internal memory, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, an antenna, a mobile communication module, a wireless communication module, an audio module, a receiver, a microphone, an earphone interface, a sensor module, buttons, and a camera. The sensor module may include at least one of a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, and a bone conduction sensor.

[0088] In related art, electronic device 01 may also include a sound-generating device such as a speaker, buzzer, or sonar module, located within the aforementioned installation space. These sound-generating devices are relatively large; for example, a speaker may occupy approximately one-quarter of the volume of a smartwatch. Furthermore, the multiple sound-generating devices may overlap in at least one direction, such as the Z direction, resulting in a larger size in that direction, which is detrimental to the trend toward thinner, lighter, and more compact electronic devices.

[0089] In order to solve the above problem, the embodiments of the present application provide that the electronic device 01 does not need to be provided with a speaker, buzzer or sonar module, but can still realize the functions of the speaker, buzzer or sonar module, thereby solving the problem of the large size of the electronic device 01 without affecting the product function. In some embodiments of the present application, such as Figure 3 ( Figure 2 As shown in the exploded view of the display module 10, the display module 10 may include a display screen 101, a support plate 102 and at least one piezoelectric vibrating plate 103 ( Figure 3 A piezoelectric vibrating piece 103 is used as an example for explanation).

[0090] Among them, the above-mentioned display screen 101 can be a self-luminous display screen, such as an organic light-emitting diode (OLED) display screen, a micro light-emitting diode (MicroLED) display screen, or a mini LED display screen, or a quantum dot light-emitting diode (QLED) display screen. Alternatively, the above-mentioned display screen 101 can also be a liquid crystal display (LED) that requires a backlight module. This application does not limit the type of the above-mentioned display screen 101. Based on this, the above-mentioned display screen 101 has a display surface for displaying an image, and a back surface arranged opposite to the display surface. Figure 2 The side of the middle frame 11 facing away from the rear cover 12 can expose the display surface of the display screen 101.

[0091] Continue as Figure 3 As shown, the support sheet 102 can be disposed on the back side (B) of the display screen 101 and connected to the display screen 101. Furthermore, the piezoelectric vibrating sheet 103 can be disposed on a side of the support sheet 102 facing away from the display screen 101 and connected to the support sheet 102. Furthermore, the piezoelectric vibrating sheet 103 can be used to drive the display screen 101 to vibrate in the thickness direction (i.e., the Z direction) of the display screen 101.

[0092] The piezoelectric vibrating piece 103 has a first vertical projection on the display screen 101 (i.e., the XY plane), and the first vertical projection can be located within the second vertical projection range of the supporting piece 102 on the display screen 101, that is, the back side of the piezoelectric vibrating piece 103 facing the supporting piece 102 can be completely covered by the supporting piece 102.

[0093] For example, the material of the piezoelectric vibrating piece 103 may include a piezoelectric material, such as a piezoelectric ceramic. For example, the piezoelectric vibrating piece 103 may include a single piezoelectric ceramic piece or a plurality of stacked piezoelectric ceramic pieces. The piezoelectric ceramic piece may vibrate along the thickness direction of the piezoelectric ceramic piece, and thus the thickness direction of the piezoelectric ceramic piece may be its vibration direction. In the vibration direction of the piezoelectric ceramic piece, the piezoelectric vibrating piece 103 may further include a metal layer provided on two opposing surfaces of the piezoelectric ceramic piece, for example, a silver layer or other metal layer formed by electroplating. The metal layer may be electrically connected to the electrodes of the piezoelectric vibrating piece 103.

[0094] Based on this, piezoelectric materials exhibit both direct and inverse piezoelectric effects. The direct piezoelectric effect refers to the phenomenon of electrical polarization caused by deformation. When physical pressure is applied to a piezoelectric material, the electric dipole moment within the material shortens due to compression. To counteract this change, the piezoelectric material generates equal amounts of positive and negative charges on opposing surfaces. When the pressure is removed, the positive and negative charges generated on the material's surfaces disappear. The direct piezoelectric effect is essentially the process of converting mechanical energy into electrical energy.

[0095] Conversely, the inverse piezoelectric effect refers to the fact that when an electric field is applied in the polarization direction of a piezoelectric material, the piezoelectric material will produce mechanical deformation or mechanical pressure in a certain direction. When the external electric field is removed, these deformations or stresses disappear. This inverse piezoelectric effect can be used to apply different voltages to the piezoelectric vibrating plate 103 to control the movement direction and vibration frequency of the piezoelectric vibrating plate 103, depending on the needs of screen sound generation. The embodiments of the present application can utilize this inverse piezoelectric effect to enable the piezoelectric vibrating plate 103 to drive the display screen 101 to vibrate, thereby achieving screen sound generation.

[0096] In some embodiments of the present application, Figure 4 As shown, the electronic device 01 may further include a drive circuit 200 electrically connected to the piezoelectric vibrating piece 103. For example, the drive circuit 200 may be electrically connected to the electrodes of the piezoelectric vibrating piece 103. Furthermore, the drive circuit 200 may be disposed on the mainboard and electrically connected to a processor 201 (e.g., an MCU).

[0097] The processor 201 can use a virtual low frequency algorithm or an audio effect algorithm to control the AC voltage output by the driving circuit 200 as needed (eg Figure 5 The frequency of the AC voltage can match the vibration frequency of the piezoelectric vibrating piece 103 and the display screen 101. For example, the driving circuit 200 may include a digital signal processor (DSP) and a power amplifier.

[0098] In addition, the direction of the AC voltage waveform can match the vibration direction of the piezoelectric vibrating piece 103. For example, when the voltage received by the piezoelectric vibrating piece 103 is Figure 5 When the voltage at A is Figure 6 In the initial state shown in (b), it arches upward along the Z direction to form a Figure 6 Alternatively, when the voltage received by the piezoelectric vibrating piece 103 is Figure 5 When the voltage at point B is Figure 6 In the initial state shown in (b), it arches downward along the Z direction to form a Figure 6 The shape shown in (c) in FIG.

[0099] Since the voltage applied to the piezoelectric vibrating piece 103 will continuously change at points A and B, the piezoelectric vibrating piece 103 will continuously arch upward or downward along the Z direction, thereby generating vibration along the Z direction. As can be seen from the above, the piezoelectric vibrating piece 103 is connected to the back of the display screen 101 through the supporting piece 102. Therefore, during the vibration process, the piezoelectric vibrating piece 103 can also drive the display screen 101 along the Z direction. Figure 2 The Z direction in the screen vibrates at a preset frequency to achieve the purpose of screen sound.

[0100] In summary, on the one hand, due to Figure 3 In the thickness direction (i.e., the Z direction) of the display screen 101 shown, the piezoelectric vibrating piece 103 can drive the display screen 101 to vibrate, and the above-mentioned display screen 101 can act as a diaphragm to realize screen sound under the drive of the piezoelectric vibrating piece 103. In this case, the above-mentioned screen sound can realize the functions of a speaker such as making calls, playing music, and voice broadcasting, as well as the function of a buzzer that emits a buzzing sound. In addition, when the user wears the above-mentioned electronic device 01 underwater, for example, when the user is diving underwater, the above-mentioned screen sound can use sound waves to communicate text, pictures, voice, etc. underwater to realize the function of the sonar module. In this way, the above-mentioned electronic device 01 does not need to be provided with a speaker, a buzzer, a sonar module, etc. for sound-emitting devices, thereby saving the internal space of the electronic device, which is conducive to the design trend of ultra-thin and miniaturized electronic devices.

[0101] On the other hand, continue as Figure 3 As shown, a support plate 102 is disposed between the piezoelectric vibrating plate 103 and the display screen 101. The piezoelectric vibrating plate 102 is connected to the back of the display screen 101. Furthermore, the first vertical projection of the piezoelectric vibrating plate 103 on the display screen 101 is within the second vertical projection of the support plate 102 on the display screen 101. This allows the surface of the piezoelectric vibrating plate 103 facing the display screen 101 to be completely covered by the support plate 102. This allows the entire piezoelectric vibrating plate 103 to be supported by the support plate 102, providing a flat support surface for the piezoelectric vibrating plate 103. This facilitates the transmission of the vibration of the piezoelectric vibrating plate 102 to the display screen 101, thereby enhancing the sound effect of the screen.

[0102] For example, the larger the area of ​​the support sheet 102 covering the back of the display screen 101, the larger the area of ​​the support sheet 102 used to support the piezoelectric vibration sheet 103. Therefore, the area of ​​the piezoelectric vibration sheet 103 can be increased, thereby effectively improving the effect of the piezoelectric vibration sheet 103 driving the display screen 101 to produce sound.

[0103] In addition, the above-mentioned support sheet 102 can be made of a material that absorbs less vibration. For example, the support sheet 102 can be a resin material, such as a resin substrate composed of polyimide (PI) or polyester (PET). Alternatively, the support sheet 102 is also a metal substrate made of a metal material. Alternatively, the above-mentioned support sheet 102 can also be a flexible circuit board including the above-mentioned resin material. Based on this, in some embodiments of the present application, the above-mentioned piezoelectric vibration sheet 103 can be directly bonded to the support sheet 103, that is, no other film layer is required between the piezoelectric vibration sheet 103 and the support sheet 103 except for the glue layer. Thereby, it is possible to avoid the phenomenon that a component that can absorb vibration, such as foam, is provided between the piezoelectric vibration sheet 103 and the display screen 101, which leads to a weakening of the vibration effect.

[0104] In addition, the support sheet 103 can also be made of a light-shielding material, such as at least one of a resin or metal with a light-shielding effect, so that the support sheet 103 has a light-shielding effect, thereby being able to replace the light-shielding material in the original electronic device 01, such as the support sheet 102. Figure 7 The foam 50 shown (the foam 50 covers the back of the display screen 101, and components such as FPC can be set on the foam 50) will cover the above-mentioned supporting plate 103 at the position where the foam was originally required, thereby increasing the area of ​​the supporting plate 103, which is conducive to increasing the area of ​​the piezoelectric vibration plate 103.

[0105] The following describes the structure of the piezoelectric vibrating plate 103 and the supporting plate 102 in combination with the structure of the display screen 101. In some embodiments of the present application, the display module 10 may further include: Figure 8 The display module 10 may further include a display driver IC (DDIC) 300 disposed on the electrical connection portion 110. The display driver IC 300 is electrically connected to the pixel circuit in the display screen 101 to drive the display screen 101 to display images.

[0106] Based on this, Figure 9 As shown, the electrical connection portion 110 can be bent to the back side B of the display screen 101 and located between the middle frame 11 and the rear shell 12 (as shown in FIG. Figure 2 The electrical connection portion 110 may include a bent portion 111 and a non-bent portion 301. The first end a1 of the bent portion 111 is electrically connected to the display screen 101, and the second end a2 of the bent portion 111 is bent toward the back side B of the display screen 101. The non-bent portion 301 is electrically connected to the second end a2 of the bent portion 111 and is disposed on the back side of the display screen 101.

[0107] In this case, after the bending portion 111 is bent, the non-bending portion 301 electrically connected to the bending portion 111 can be set on the back side B of the display screen 101, so that the non-bending portion 301 can be electrically connected to a mainboard provided with a processor (for example, MCU), for example, through a board-to-board (BTB) connector, so that the control signal output from the processor on the mainboard can be transmitted to the bending portion 111 through the non-bending portion 301, and then transmitted to the display driver chip 300.

[0108] In some embodiments of the present application, the electrical connection portion 110 may be a first circuit board that combines rigidity and flexibility. Therefore, the bending portion 111 and the non-bending portion 301 of the electrical connection portion 110 are integrally formed. A portion of the first circuit board may be constructed from a flexible material, and this portion may constitute the bending portion 111. Furthermore, another portion of the first circuit board may be constructed from a rigid material, and this portion may constitute the non-bending portion 301.

[0109] Alternatively, in other embodiments of the present application, the bending portion 111 and the non-bending portion 301 in the electrical connection portion 110 are two independent parts. For example, the non-bending portion 301 can be a second circuit board. The second circuit board can be a flexible printed circuit board (FPC) or a PCB, which is not limited in this application. The non-bending portion 301 can be bonded to the bending portion 111. The following uses the bending portion 111 and the non-bending portion 301 as two independent parts as an example to illustrate the packaging method of the display module 10.

[0110] For example, the display module 10 may be packaged using a chip on plastic (COP) process to form a Figure 9 The display screen 101 and the bending portion 111 are shown. In this case, the display screen 101 may be a flexible display screen, such as the OLED, and the display screen 101 may include a substrate and a pixel array circuit and a light-emitting device arranged on the substrate. The substrate may be a flexible substrate ( Figure 9 In this case, the display screen 101 and the bending portion 111 share the same flexible substrate.

[0111] Alternatively, for example, the display module 10 may be packaged using a chip on film (COF) process to form a Figure 10AThe display screen 101 and the bending portion 111 shown. In this case, the bending portion 111 may be an FPC, and the bending portion 111 may have a first end a1 facing the display screen 101, and the first end a1 of the bending portion 111 may be connected to the substrate ( Figure 10A The above-mentioned substrate may be a flexible substrate or a hard substrate, such as glass, which is not limited in this application.

[0112] in, Figure 10A The following is an example of an example in which the electrical connection portion 110 is bent to the back of the display screen 101, the non-bending portion 301 of the FPC or PCB, and the display driver chip 300 is disposed above the bending portion 111. In other embodiments of the present application, such as Figure 10B As shown, the non-bending portion 301 and the display driver chip 300 may also be disposed below the bending portion 111 , which is not limited in this application.

[0113] Depend on Figure 9 、 Figure 10A or Figure 10B As shown, when the bending portion 111 is bent to the back side B of the display screen 101, the non-bending portion 301 electrically connected to the bending portion 111 can also be provided on the back side B of the display screen 101. This application does not limit the packaging process of the display module 10. For the convenience of description, the following is based on the display module 10 using Figure 9 The COP process shown is used as an example for illustration.

[0114] Based on this, when the bending portion 111 and the non-bending portion 301 are two independent parts, that is, when the non-bending portion 301 is the second circuit board, in order to further improve the utilization rate of the internal space of the electronic device 01, as shown in FIG. Figure 11 As shown, the bending portion 111 has a fourth vertical projection on the display screen 101 , and the fourth vertical projection may be located within the range of the fifth vertical projection of the non-bending portion 301 on the display screen 101 .

[0115] In this way, the bending portion 111 and the non-bending portion 301 can be stacked so that a portion of the area of ​​the bending portion 111 and the non-bending portion 301 can overlap, reducing the occupied area of ​​the bending portion 111 and the non-bending portion 301 in the XY plane (parallel to the plane where the display screen 101 is located), thereby achieving the purpose of improving the internal space utilization of the electronic device 01.

[0116] Based on this, when the bending portion 111 and the non-bending portion 301 are stacked, continue as follows Figure 11As shown, the non-bending portion 301 may be provided with an avoidance hole 3011 that passes through the non-bending portion 301. In this case, the display driver chip 300 electrically connected to the bending portion 111 may be disposed within the avoidance hole 3011, thereby avoiding positional interference between the display driver chip 300 and the non-bending portion 301.

[0117] In some embodiments of the present application, the display screen 101, the display driver chip 300, the bending portion 111, the non-bending portion 301, the supporting plate 102 and the piezoelectric vibrating plate 103 may be arranged in the following order: Figure 12 As shown, first, the display driver chip 300 is electrically connected to the bending portion 111. Next, the non-bending portion 301 is reversely bonded to the bending portion 111, and the display driver chip 300 is passed through the avoidance hole 3011 on the non-bending portion 301 (as shown in FIG. Figure 11 shown).

[0118] For example, continue as Figure 12 As shown, the bending portion 111 has a first end a1 facing the display screen 101 and a second end a2 facing away from the display screen 101, and the first end a1 of the bending portion 111 can be connected to the display screen 101. Based on this, the way to reversely bind the non-bending portion 301 to the bending portion 111 can be that the non-bending portion 301 has a non-electrical connection end b1 and an electrical connection end b2. Wherein, relative to the electrical connection end b2, the non-electrical connection end b1 is arranged close to the display screen 101, and the electrical connection end b2 of the non-bending portion 301 can be electrically connected to the second end a2 of the bending portion 111. The electrical connection end b2 of the non-bending portion 301 can be the position where the gold finger in the non-bending portion 301 serving as the second circuit board is located.

[0119] In the embodiments of the present application, "gold fingers" may refer to multiple metal conductive contacts arranged at the edge of a circuit board, arranged in a finger-like structure for electrical connection to other circuit boards or electronic components. The metal conductive contacts may be made of gold or a gold alloy, or may be gold-plated metal sheets to provide good electrical conductivity, thereby effectively transmitting electrical signals.

[0120] Thus, through the reverse binding method, the non-electrical connection end b1 of the non-bending portion 301 can be positioned closer to the display screen 101 relative to the electrical connection end b2. Compared to the forward binding method in which the non-electrical connection end b1 of the non-bending portion 301 extends beyond the bending portion 111, the reverse binding method can increase the overlapping area between the non-bending portion 301 and the bending portion 111, thereby further improving the utilization rate of the internal space of the electronic device 01.

[0121] In addition, when the non-bending portion 301 is bound to the bending portion 111, the non-bending portion 301 can be electrically connected to the display driver chip 300. Based on this, the display module 10 can also include the following: Figure 12 At least one electronic component 40 is shown. The electronic component 40 can be a device compatible with the display driver chip 300, such as a capacitor, inductor, resistor, etc., to enable the display driver chip 300 to operate normally. The electronic component 40 is placed on the non-bending portion 301 and electrically connected to the non-bending portion 301. Since the non-bending portion 301 is electrically connected to the display driver chip 300, the electronic component 40 can be electrically connected to the display driver chip 300 through the non-bending portion 301.

[0122] Based on this, since the non-bending portion 301 reversely bound to the bending portion 111 is stacked with the bending portion 111, and the display driver chip 300 passes through the avoidance hole 3011 (such as Figure 11 As shown in FIG, the at least one electronic component 40 can be disposed on the surface of the non-bending portion 301 facing away from the bending portion 111, and located around the display driver chip 300. This allows the display driver chip 300 to have a sixth vertical projection on the bending portion 111, which does not overlap with the seventh vertical projection of the electronic component 40 on the bending portion 111. This prevents interference between the electronic component 40 and the display driver chip 300.

[0123] The above is based on the non-bending portion 301. Figure 12 The reverse binding is illustrated using the bent portion 111 as an example. In other embodiments of the present application, a forward binding method can be used to electrically connect the electrical connection end b2 of the non-bending portion 301 having the gold finger to the second end a1 of the bent portion 111 facing away from the display screen, with the remaining non-electrically connected portion of the non-bending portion 301 extending out of the bent portion 111. In this case, the electronic component 40 can be disposed on the portion of the non-bending portion 301 extending out of the bent portion 111, thereby preventing interference between the electronic component 40 and the display driver chip 300 on the bent portion 111.

[0124] Next, if Figure 13 As shown, a support sheet 102 and a piezoelectric vibrating sheet 103 may be sequentially arranged on the back side B of the display screen 101. For example, the support sheet 102 may be first attached to the back side B of the display screen 101. In some embodiments of the present application, in order to improve the integration of the display module 10, the support sheet 102 may include: Figure 14The flexible substrate 1021 and the near field communication (NFC) coil 1022 are shown. The NFC coil 1022 can be disposed within the flexible substrate 1021. This eliminates the need for an additional NFC coil. The flexible substrate with the NFC coil can be shared with the support sheet 102, thereby reducing the number of components within the electronic device, simplifying the internal structure of the electronic device, and optimizing the size.

[0125] For example, the material of the flexible substrate 1021 may include a resin material such as polyimide (PI) or polyester (PET), and the material constituting the NFC coil 1022 may include metal copper. Therefore, the support sheet 102 may be prepared by the method of preparing an FPC. As can be seen from the above, the larger the area of ​​the support sheet 102, the larger the area of ​​the support sheet 102 used to support the piezoelectric vibrating sheet 103, which is conducive to increasing the area of ​​the piezoelectric vibrating sheet 103. Therefore, if Figure 14 As shown, in order to increase the distance between the support sheet 102 and the back surface B of the display screen 101 (as shown in FIG. Figure 13 By ensuring a contact area of ​​1021 (as shown), the area of ​​the flexible substrate 1021 in the support sheet 102 can be maximized, and the NFC coil 1022 does not need to cover the entire flexible substrate 1021. In this way, the performance of the NFC coil 1022 can be guaranteed while increasing the area of ​​the entire support sheet 102.

[0126] Alternatively, in other embodiments of the present application, when the electronic device 01 does not need to have NFC functionality, or the NFC coil is located elsewhere, the support sheet 102 may be a resin substrate, such as a substrate made of a resin material such as polyimide (PI) or polyester (PET). Alternatively, the support sheet 102 may be a metal substrate or an FPC.

[0127] Based on this, in order to maximize the area of ​​the support sheet 102 used to support the piezoelectric vibrating sheet 103, in some embodiments of the present application, for example, Figure 15 As shown, the support sheet 102 can cover the entire back side B of the display screen 101 (as shown in FIG. Figure 13 As shown in the figure, within the manufacturing and installation tolerances, the vertical projection of the support sheet 102 on the XY plane can completely overlap with the vertical projection of the display screen 101 on the XY plane. In this case, the shape of the support sheet 102 can be identical or approximately identical to the shape and size of the display screen 101. In this case, the area covered by the support sheet 102 on the display screen 101 can be maximized or nearly maximized, thereby providing a larger support area for the piezoelectric vibrating piece 103, thereby increasing the area of ​​the piezoelectric vibrating piece 103.

[0128] Next, if Figure 15As shown, the bent portion 111 bounded by the non-bent portion 301 is bent in the direction indicated by the arrow toward the back side B of the display screen 101, so that the electrical connection portion 110 (including the bent portion 111 and the non-bent portion 301) is disposed on the side of the support sheet 102 facing away from the display screen 101, that is, bent toward the back side of the display screen 101. At the same time, the display driver chip 300 disposed on the bent portion 111 and the electronic component 40 disposed on the non-bent portion 301 can both be disposed along the bent portion 111 on the back side B of the display screen 101.

[0129] In this case, if Figure 16 As shown, the electrical connection portion 110 (including the bent portion 111 and the non-bent portion 301) has a third vertical projection on the display screen 101, which can overlap with the second vertical projection of the support sheet 102 on the display screen 101. Furthermore, the vertical projections of the display driver chip 300 and the electronic component 40 on the display screen 101 can also overlap with the second vertical projection of the support sheet 102 on the display screen 101. This allows the electrical connection portion 110 to be stacked with the support sheet 102. Similarly, the display driver chip 300 and the electronic component 40 can be stacked with the support sheet 102, thereby effectively improving the space utilization of the electronic device within the XY plane.

[0130] Next, Figure 17 The piezoelectric vibrating plate 103 is attached to the side of the support plate 102 facing away from the display screen 101. The third vertical projection of the electrical connection portion 110 on the display screen 101 can be arranged to not overlap with the first vertical projection of the piezoelectric vibrating plate 103 on the display screen 101. This prevents interference between the placement of the piezoelectric vibrating plate 103 and the placement of the electrical connection portion 110. For example, the piezoelectric vibrating plate 103 can be placed on the entire back surface of the support plate 102, except for the area where the electrical connection portion 110 is located. This effectively increases the coverage area of ​​the piezoelectric vibrating plate and enhances the sound generation effect of the screen.

[0131] In addition, continue as Figure 17 As shown, the vertical projections of the display driver chip 300 and the electronic component 40 on the display screen 101 can be non-overlapping with the vertical projections of the piezoelectric vibrating piece 103 on the display screen 101, thereby preventing the display driver chip 300 and the electronic component 40 from interfering with the positions of the bending portion 111 and the non-bending portion 301, thereby affecting the vibration effect of the piezoelectric vibrating piece 103. In addition, as can be seen from the above, the display driver chip 300 can be set in the avoidance hole 3011 on the non-bending portion 301, thereby avoiding positional interference with the electronic component 40 on the non-bending portion 301. On this basis, Figure 17 The display module 10 shown is arranged at Figure 18 within the frame 11 shown, and then Figure 2 The rear cover 12 shown is buckled onto the back of the display module 10 , thereby enabling the assembly of the electronic device 01 .

[0132] The above description uses the example of installing the support sheet 102 on the back surface B of the display screen 101 before the electrical connection portion 110 is bent to the back surface of the display screen 101. After the electrical connection portion 110 is bent to the back surface of the display screen 101, the piezoelectric vibrating piece 103 is installed on the surface of the support sheet 102 facing away from the display screen 101. In other embodiments of the present application, if the electrical connection portion 110 and the piezoelectric vibrating piece 103 do not overlap, the piezoelectric vibrating piece 103 can be first attached to the surface of the support sheet 102 facing away from the display screen 101. The support sheet 102, along with the piezoelectric vibrating piece 103, can then be attached to the back surface of the display screen 101. Finally, the electrical connection portion 110 is bent to the back surface of the display screen 101.

[0133] On this basis, in order to avoid interference between the location of the piezoelectric vibrating piece 103 and the location of the electrical connection portion 110, in some embodiments of the present application, such as Figure 19A (along Figure 17 As shown in the top view obtained in the direction A in the figure, the back of the display screen 101 can have a first area 601 and a second area 602, and the sum of the areas of the first area 601 and the second area 602 can be the same as the area of ​​the back of the display screen 101, that is, the back of the display screen 101 can be divided into two areas in total, and the two areas can be the first area 601 and the second area 602 respectively.

[0134] In this case, continue as Figure 19A As shown, the piezoelectric vibrating piece 103 can be located in the first area 601. For example, the piezoelectric vibrating piece 103 can cover the entire first area 601. That is, within the manufacturing and installation tolerances, the first vertical projection of the piezoelectric vibrating piece 103 on the display screen 101 completely overlaps the first area 601. Furthermore, the electrical connection portion 110, the display driver chip 300, and the electronic components 40 can be located in the second area 602.

[0135] In the case where the third perpendicular projection of the electrical connection portion 110 on the display screen 101 does not overlap with the first perpendicular projection of the piezoelectric vibrating piece 103 on the display screen 101, a gap H may be provided between the piezoelectric vibrating piece 103 and the electrical connection portion 110. For example, within the manufacturing and installation tolerances, the smaller the gap between the piezoelectric vibrating piece 103 and the electrical connection portion 110, the better, thereby facilitating a larger area of ​​the piezoelectric vibrating piece 103. Alternatively, if the manufacturing process can meet precision requirements, the gap H may not be required between the piezoelectric vibrating piece 103 and the electrical connection portion 110.

[0136] Based on this, continue as Figure 19A As shown above, it can be seen that the bending portion 111 and the non-bending portion 301 in the electrical connection portion 110 are stacked, and the display driver chip 300 is located in the avoidance hole 3011 (such as Figure 17 (as shown), the electronic components 40 are located around the display driver chip 300, effectively improving the utilization rate of the second region 602 and facilitating a reduction in the area of ​​the second region 602. Consequently, when the area of ​​the second region 602 is reduced, the area of ​​the first region 601 can be increased, thereby increasing the XY area of ​​the piezoelectric vibrating piece 103 located within the first region 601. As can be seen from the above, when the area of ​​the piezoelectric vibrating piece 103 in the XY plane is increased, the effect of the piezoelectric vibrating piece 103 driving the display screen 101 to generate screen sound can be effectively improved.

[0137] For example, when the piezoelectric vibrating piece 103 drives the display screen 101 to function as a speaker to play voice (for example, to play a prompt sound or video when the user wears the electronic device 01 to exercise), the sound intensity of the screen sound can reach approximately 78.9 dBSPL as shown in Table 1. Alternatively, for another example, when the piezoelectric vibrating piece 103 drives the display screen 101 to function as a speaker to play music, the sound intensity of the screen sound can reach approximately 84.9 dBSPL as shown in Table 1. Alternatively, for another example, when the piezoelectric vibrating piece 103 drives the display screen 101 to function as a buzzer to play a buzzer sound, the sound intensity of the screen sound can reach approximately 68.2 dBSPL as shown in Table 1.

[0138] Table 1

[0139] Screen sound mode data unit voice 78.9 dBSPL music 84.9 dBSPL Beep 68.2 dBSPL

[0140] Or, for example, when the piezoelectric vibrating piece 103 drives the display screen 101 to realize the function of the sonar module, Figure 19B As shown, the two electronic devices 01a and 01b can both be placed underwater at a depth D of 7 to 8 meters, and the distance H between the electronic devices 01a and 01b can be about 20 meters.

[0141] In this case, the processor inside the electronic device 01a can convert text, voice, image and other information into electrical signals, and the encoder digitizes the information (for example, each data packet can include 100 frames, and the 100 frames of data can contain 24 bits of valid information) and transmits it to the electronic device 01a. Figure 4 The driving circuit 200 shown transmits the above electrical signal to Figure 19A The piezoelectric vibrating piece 103 can drive the display screen 101 (such as Figure 17(as shown) vibrates and emits sound. This sound is transmitted through water to electronic device 01b, which then converts the sound signal into corresponding text, voice, image, and other information. The success rate of electronic device 01b receiving the signal can reach over 80%.

[0142] The above is based on Figure 19A The first region 601 in the embodiment is provided with a piezoelectric vibrating piece 103 as an example. In other embodiments of the present application, for example Figure 20 As shown, when the back of the display screen 101 may have a first area 601 and a second area 602, the display module 10 may include a plurality of piezoelectric vibrating pieces 103, and the plurality of piezoelectric vibrating pieces 103 may be spaced apart within the first area 601. For example, the plurality of piezoelectric vibrating pieces 103 may have the same shape and size, and the plurality of piezoelectric vibrating pieces 103 may be arranged in an array.

[0143] Alternatively, for example, at least two of the plurality of piezoelectric vibrating plates 103 may have different shapes or sizes. For example, the piezoelectric vibrating plate 103 located in the center may have a regular shape, such as a rectangle. The portion of the piezoelectric vibrating plate 103 located at the edge of the display screen may match the edge contour of the display screen. This effectively utilizes the layout area of ​​the first region 601 and increases the number of piezoelectric vibrating plates 103.

[0144] In addition, the above is based on Figure 19A The piezoelectric vibrating plate 103 in the first area 601 covers the entire first area 601. In other embodiments of the present application, the piezoelectric vibrating plate 103 does not need to cover the entire first area 601. For example, the shape of the vertical projection of the piezoelectric vibrating plate 103 in the first area 601 on the supporting plate 102 can be as follows: Figure 21 The ring shown ( Figure 21 In the example, a circular ring is used, and a rectangular ring can also be used), such as Figure 22 As shown in the circle (or ellipse), or as Figure 23 The rectangle shown.

[0145] In other embodiments of the present application, when the display module 10 has a plurality of piezoelectric vibrating pieces, for example, Figure 24 As shown, the back side B of the display screen 101 may have a first area 601, a second area 602 and at least one third area 603. The sum of the areas of the first area 601, the second area 602 and the third area 603 is the same as the area of ​​the back side B of the display screen 101, that is, the back side of the display screen 101 may be divided into three areas in total, and the above three areas may be the first area 601, the second area 602 and the third area 603 respectively.

[0146] The first region 601 and the second region 602 are arranged along a first direction (i.e., the X direction), while the second region 602 and the third region 603 are arranged along a second direction (i.e., the Y direction). The first direction (i.e., the X direction) and the second direction (i.e., the Y direction) are different, and the first direction (i.e., the X direction) and the second direction (i.e., the Y direction) are parallel to the back surface of the display screen 101. The electrical connection portion 110 (including the non-bending portion 301 and the bending portion 111) can be located within the second region 602.

[0147] On this basis, if Figure 25 As shown, the at least one piezoelectric vibrating piece may include a first piezoelectric vibrating piece 1031 and a second piezoelectric vibrating piece 1032. The first piezoelectric vibrating piece 1031 may cover the entire first region 601. Similarly, within manufacturing and installation tolerances, the vertical projection of the first piezoelectric vibrating piece 1031 on the XY plane may completely overlap with the first region 601. In this case, the shape and size of the first piezoelectric vibrating piece 1031 may be identical or approximately identical to those of the first region 601. Furthermore, the second piezoelectric vibrating piece 1032 is located within the third region 603.

[0148] Based on this, the second region 602 and the third region 603 are arranged along the second direction, i.e., the Y direction. In this case, the second region 602 and the third region 603 can be located above the first region 601, and the third region 603 is provided on one side of the second region 602. For example, the third region 603 can be provided on at least one of the left and right sides of the second region 602 where the electrical connection portion 110 is located.

[0149] In this way, a piezoelectric vibration piece, such as the second piezoelectric vibration piece 1032 mentioned above, can be set on at least one of the left and right sides of the second area 602 where the electrical connection part 110 is located, thereby increasing the number of piezoelectric vibration pieces and the contact area between the piezoelectric vibration piece and the display screen 101, thereby achieving the purpose of improving the sound effect of driving the screen.

[0150] Figure 25 This description uses the example of a gap between the first piezoelectric vibrating piece 1031 and the second piezoelectric vibrating piece 1032. In other embodiments of the present application, within the permitted range of the manufacturing process and manufacturing tolerances, a gap may not be required between the first piezoelectric vibrating piece 1031 and the second piezoelectric vibrating piece 1032. Alternatively, the first piezoelectric vibrating piece 1031 and the second piezoelectric vibrating piece 1032 may be connected to form an integrated structure. In this case, this integrated structure may cover both sides of the electrical connection portion 110 along the Y direction, and the electrodes of the integrated structure may be provided on both sides of the electrical connection portion 110.

[0151] The above is an example of the arrangement of the piezoelectric vibrating piece 103 and the electrical connection portion 110, taking the outline of the display module 10 as a circle. In other embodiments of the present application, such as Figure 26A As shown, when the outline shape of the display module 10 is a rectangle, the piezoelectric vibrating piece 103 can be a regular rectangle, and a gap H can be formed between the piezoelectric vibrating piece 103 and the electrical connection portion 110 (including the non-bending portion 301 and the bending portion 111). Figure 26B As shown, within the permitted range of the manufacturing process and manufacturing tolerance, no gap is required to be provided between the piezoelectric vibrating piece 103 and the electrical connection portion 110 .

[0152] Or, as Figure 26C As shown, when the display module 10 is rectangular, the piezoelectric vibrating piece 103 can be irregular in shape and can cover both sides of the electrical connection portion 110 along the Y direction. Similarly, the electrodes of the piezoelectric vibrating piece 103 can be provided on both sides of the electrical connection portion 110 along the Y direction.

[0153] For the sake of convenience, the following description will still be based on the example of the display module 10 having a circular outline. When the display module 10 has a rectangular outline or other shapes, the configuration can be obtained in the same way and will not be described in detail. Based on this, the above description is based on the example of the piezoelectric vibrating plate 103 and the electrical connection portion 110 (including the non-bending portion 301 and the bending portion 111) not overlapping when the supporting plate 102 covers the entire back of the display screen 101. In other embodiments of the present application, such as Figure 27 As shown, when the support sheet 102 covers the entire back side of the display screen 101 , the piezoelectric vibrating piece 103 can cover the entire surface B of the support sheet 102 facing away from the display screen 101 . In this case, the piezoelectric vibrating piece 103 can have the same shape as the support sheet 102 .

[0154] In this case, the support sheet 102 and the piezoelectric vibrating piece 103 can be attached sequentially to the back surface B of the display screen 101. Alternatively, the support sheet 102 and the piezoelectric vibrating piece 103 can be attached together to form an assembly, and then the assembly can be attached to the back surface B of the display screen 101. Next, the electrical connection portion 110 is bent toward the back surface of the display screen 101, so that the electrical connection portion 110 is located on the side of the piezoelectric vibrating piece 103 facing away from the support sheet 102, thereby allowing the electrical connection portion 110 to be stacked with the piezoelectric vibrating piece 103. This approach can approximately maximize the area of ​​the piezoelectric vibrating piece 103. For example, within the allowable range of manufacturing and assembly tolerances, the area of ​​the piezoelectric vibrating piece 103 and the support sheet 102 can be the same as the area of ​​the back surface B of the display screen 101, thereby achieving the purpose of improving the sound effect of the screen.

[0155] In addition, the above is based on Figure 17The support sheet 102 and the electrical connection portion 110 are stacked as an example. In other embodiments of the present application, the support sheet 102 and the electrical connection portion 110 do not overlap. Figure 28 As shown, the electrical connection portion 110 has a third vertical projection on the display screen 101, and this third vertical projection does not overlap with the second vertical projection of the support plate 102 on the display screen 101. Based on this, it can be seen from the above that the piezoelectric vibrating piece 103 is completely covered by the support plate 102. Therefore, the third vertical projection of the electrical connection portion 110 on the display screen 101 does not overlap with the first vertical projection of the piezoelectric vibrating piece 103 on the display screen 101. In other words, the electrical connection portion 110 and the piezoelectric vibrating piece 103 do not overlap. As a result, the placement of the support plate 102 and the piezoelectric vibrating piece 103 does not interfere with the placement of the electrical connection portion 110.

[0156] On this basis, in order to increase the area of ​​the support plate 102 and the piezoelectric vibrating plate 103 covering the back of the display screen 101, continue as follows Figure 28 As shown, the edges of the support sheet 102 and the piezoelectric vibrating piece 103 can overlap with the edges of the display screen 101. This allows the entire backside of the display screen 101, except for the electrical connection portion 110, to be covered by the support sheet 102 and the piezoelectric vibrating piece 103, thereby increasing the support area for the piezoelectric vibrating piece 103. Based on this, the arrangement of the piezoelectric vibrating piece 103 is the same as described above and will not be repeated here. Furthermore, the stacking arrangement of the electrical connection portion 110, as well as the arrangement of the display driver chip 300 and the electronic components 40, are the same as described above and will not be repeated here.

[0157] The above description is based on an example in which a support sheet 102 is provided between the piezoelectric vibrating sheet 103 and the back of the display screen 101 in the display module 10. In other embodiments of the present application, as described above, Figure 29 As shown, the display module 10 includes the display screen 101 and the piezoelectric vibrating piece 103. Alternatively, the display module 10 further includes an electrical connection portion 110 (including a bending portion 111 and a non-bending portion 301). The display screen 101 and the electrical connection portion 110 are configured in the same manner as described above and will not be described in detail here.

[0158] In addition, continue as Figure 29 As shown, the piezoelectric vibrating piece 103 is disposed on the back surface B of the display screen 101. Furthermore, the piezoelectric vibrating piece 103 can be directly connected to the display screen 101. For example, the piezoelectric vibrating piece 103 is directly bonded to the back surface B of the display screen 101 by a dispensing process.

[0159] On this basis, if Figure 30As shown, the vertical projection of the piezoelectric vibrating plate 103 on the display screen 101 can be non-overlapping with the vertical projection of the electrical connection portion 110 on the display screen 101. Furthermore, the edge of the piezoelectric vibrating plate 103 can overlap with the edge of the display screen 101. This allows the piezoelectric vibrating plate 103 to cover the entire backside of the display screen 101, excluding the portion where the electrical connection portion 110 is located. This increases the area of ​​the piezoelectric vibrating plate 103 and enhances the sound quality of the screen. Based on this, the configuration of the piezoelectric vibrating plate 103 is the same as described above and will not be further elaborated here. Furthermore, the technical effects of the piezoelectric vibrating plate 103 are the same as described above and will not be further elaborated here.

[0160] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A display module, characterized in that: include: Display screen; A supporting sheet, disposed on the back of the display screen and connected to the display screen; At least one piezoelectric vibrating plate is disposed on a side of the supporting plate facing away from the display screen and is connected to the supporting plate; in the thickness direction of the display screen, the piezoelectric vibrating plate is used to drive the display screen to vibrate; The piezoelectric vibrating plate has a first vertical projection on the display screen, and the first vertical projection is located within a second vertical projection range of the supporting plate on the display screen.

2. The display module according to claim 1, wherein: The piezoelectric vibrating piece is directly bonded to the supporting piece.

3. The display module according to claim 1 or 2, wherein: The display module further includes: an electrical connection portion, electrically connected to the display screen, wherein the electrical connection portion is bent to a side of the support sheet facing away from the display screen; The electrical connection portion has a third vertical projection on the display screen; the third vertical projection overlaps with the second vertical projection of the support sheet on the display screen.

4. The display module according to claim 3, wherein: The supporting sheet covers the entire back side of the display screen.

5. The display module according to claim 3 or 4, characterized in that: The third vertical projection does not overlap with the first vertical projection of the piezoelectric vibrating piece on the display screen.

6. The display module according to claim 5, wherein: The back of the display screen has a first area and a second area, and the sum of the areas of the first area and the second area is the same as the area of ​​the back of the display screen; The piezoelectric vibrating piece covers the entire first area; The electrical connection portion is located in the second area.

7. The display module according to claim 5, wherein: The back of the display screen has a first area and a second area, and the sum of the areas of the first area and the second area is the same as the area of ​​the back of the display screen; The display module includes a plurality of piezoelectric vibrating pieces, and the plurality of piezoelectric vibrating pieces are arranged at intervals in the first area; The electrical connection portion is located in the second area.

8. The display module according to claim 5, wherein: The back of the display screen has a first area, a second area, and a third area, and the sum of the areas of the first area, the second area, and at least one third area is the same as the area of ​​the back of the display screen; The first area and the second area are arranged along a first direction; the second area and the third area are arranged along a second direction; the first direction and the second direction are different, and the first direction and the second direction are parallel to the back of the display screen; The electrical connection portion is located in the second area; The at least one piezoelectric vibrating piece includes: a first piezoelectric vibrating plate, covering the entire first area; The second piezoelectric vibrating piece is located in the third area.

9. The display module according to claim 4, wherein: The piezoelectric vibrating plate covers the entire surface of the supporting plate away from the display screen; the electrical connection portion is located on a side of the piezoelectric vibrating plate away from the supporting plate.

10. The display module according to claim 2, wherein: The display module further includes: an electrical connection portion, electrically connected to the display screen, wherein the electrical connection portion is bent to a side of the support sheet facing away from the display screen; The electrical connection portion has a third vertical projection on the display screen; the third vertical projection does not overlap with the second vertical projection of the support sheet on the display screen.

11. The display module according to any one of claims 3 to 10, wherein: The electrical connection portion includes: a bending portion; a first end of the bending portion is electrically connected to the display screen, and a second end of the bending portion is bent to a side where the back of the display screen is located; The non-bending portion is electrically connected to the second end of the bending portion; the non-bending portion is arranged on the side where the back of the display screen is located.

12. The display module according to claim 11, wherein: The electrical connection portion is a first circuit board; or the non-bending portion is a second circuit board.

13. The display module according to claim 11 or 12, characterized in that: The non-bending portion is a second circuit board; The bent portion has a fourth vertical projection on the display screen, and the fourth vertical projection is located within the range of the fifth vertical projection of the non-bending portion on the display screen.

14. The display module according to claim 13, wherein: The bent portion has a first end facing the display screen and a second end facing away from the display screen, wherein the first end is connected to the display screen; The non-bending portion has an electrical connection end and a non-electrical connection end. Relative to the electrical connection end, the non-electrical connection end is arranged close to the display screen, and the electrical connection end is electrically connected to the second end of the bending portion.

15. The display module according to claim 13 or 14, characterized in that: The non-bending portion is provided with an avoidance hole, and the avoidance hole passes through the non-bending portion; The display module further includes: A display driver chip is disposed on the bent portion and electrically connected to the display screen; the display driver chip is disposed in the avoidance hole; At least one electronic component is arranged on the non-bending portion and is electrically connected to the non-bending portion and the display driver chip; the display driver chip has a sixth vertical projection on the bending portion, and the sixth vertical projection and the seventh vertical projection of the electronic component on the bending portion do not overlap.

16. The display module according to any one of claims 1 to 15, wherein: The vertical projection of the piezoelectric vibrating plate on the supporting plate is in the shape of a ring, a circle or a rectangle.

17. The display module according to any one of claims 1 to 16, wherein: The supporting sheet comprises: Flexible substrates; The near field communication (NFC) coil is disposed in the flexible substrate.

18. The display module according to any one of claims 1 to 16, characterized in that: The supporting sheet is a resin substrate or a metal substrate.

19. An electronic device, characterized in that: include: middle frame; The display module according to any one of claims 1 to 18; The display module is arranged in the middle frame.

20. The electronic device according to claim 19, wherein The electronic device further includes a rear shell, the rear shell being connected to the middle frame and enclosing an installation space; The display module also includes an electrical connection portion, which is electrically connected to the display screen of the display module. The electrical connection portion is bent to the back of the display screen and is located in the installation space; the side of the middle frame facing away from the rear shell exposes the display surface of the display screen.

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