CN219958202U

CN219958202U - Display device and intelligent terminal

Info

Publication number: CN219958202U
Application number: CN202321000140.XU
Authority: CN
Inventors: 陈玉龙
Original assignee: Shenzhen Transsion Holdings Co Ltd
Current assignee: Shenzhen Transsion Holdings Co Ltd
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-11-03
Anticipated expiration: 2033-04-25

Abstract

The utility model provides a display device and an intelligent terminal, wherein the display device comprises a flexible display panel, a battery module and at least one piezoelectric power generation device; the piezoelectric power generation device is arranged on the bending area of the flexible display panel, and the piezoelectric material layer in the piezoelectric power generation device is used for converting bending mechanical energy into electric energy when the flexible display panel is bent; the battery module is electrically connected with the piezoelectric power generation device and is used for storing electric energy generated by the piezoelectric power generation device. The piezoelectric power generation device in the display device can realize larger bending strain, improves the generating gain efficiency, enhances the mechanical fatigue resistance of the piezoelectric power generation device, and improves the stability and the service life of continuous power generation of the piezoelectric power generation device.

Description

Display device and intelligent terminal

Technical Field

The utility model relates to the technical field of display, in particular to a display device and an intelligent terminal.

Background

Along with the updating of mobile phones, the hardware configuration of the mobile phones is higher and higher, the network speed is higher and higher, meanwhile, people put forward stronger demands on the increase of mobile phone screens, and the large-screen mobile phones play a very good role in improving user experience and visual effects, and particularly have remarkable effects in the aspects of business communication, game playing, novice watching, movie watching and the like. However, when the screen of the existing mobile phone is increased, the whole body of the mobile phone is enlarged, which is unfavorable for carrying, so that the mobile phone with the folding screen is more and more popular with users. However, as the display screen of the mobile phone is increased, the cruising ability of the mobile phone is affected, and the application of the folding screen mobile phone is limited.

In the existing display screen technology, a piezoelectric touch screen is adopted to improve the cruising ability of the mobile phone, but the existing technical scheme is limited to simple bending or slight touch extrusion in the screen using process, and is not suitable for being used under the condition of large strain of screen folding. The piezoelectric power generation device is characterized in that materials of the piezoelectric power generation device in the prior art are rigid materials, the upper and lower metal electrodes and the middle interlayer piezoelectric film materials are poor in toughness, along with the increase of bending strain of the rigid materials, metal films of the upper and lower metal electrodes can be broken, fall off and damaged to different degrees under different strains, so that the service life of the piezoelectric power generation device is short, the fatigue resistance of the device is poor, electric energy generated by the piezoelectric film power generation is related to mechanical strain, and the larger the mechanical strain is within the range of the elastic limit of the film, the larger the piezoelectric power generation electric energy is, and the small-strain application scene of the prior art can severely limit the output of the electric energy of the piezoelectric power generation device.

The foregoing description is provided for general background information and does not necessarily constitute prior art.

Disclosure of Invention

Aiming at the technical problems, the utility model provides the display device and the intelligent terminal, which can enable the piezoelectric power generation device in the display device to realize larger bending strain, further improve the generating gain efficiency, enhance the mechanical fatigue resistance of the piezoelectric power generation device, and improve the stability and the service life of continuous power generation of the piezoelectric power generation device.

The utility model provides a display device, which comprises a flexible display panel, a battery module and at least one piezoelectric power generation device;

the piezoelectric power generation device is arranged on the bending area of the flexible display panel, and the piezoelectric material layer in the piezoelectric power generation device is used for converting bending mechanical energy into electric energy when the flexible display panel is bent;

the battery module is electrically connected with the piezoelectric power generation device and is used for storing electric energy generated by the piezoelectric power generation device.

Optionally, the bending region bends along a first direction under the action of external force, and at least two piezoelectric power generation devices are arranged along the first direction.

Optionally, the piezoelectric generating devices are symmetrically arranged about an axis of symmetry of the bending region.

Optionally, the display device further includes a carrier plate provided with a hollowed-out area, the carrier plate is adhered to the flexible display panel, and the hollowed-out area overlaps the bending area;

the piezoelectric power generation device is arranged on the surface, away from the flexible display panel, of the bearing plate.

Optionally, the display device further includes a first housing and a second housing connected by a rotating shaft;

one side of the piezoelectric power generation device, which is away from the bearing plate, is fixed on the first shell and the second shell, and is positioned between the first shell and the second shell.

Optionally, the display device further includes an electrical connection portion for electrically connecting the piezoelectric power generation device and the battery module, and the electrical connection portion further includes a rectifying and voltage stabilizing circuit, where the rectifying and voltage stabilizing circuit is configured to convert alternating current generated by the piezoelectric power generation device into voltage-stabilized direct current and transmit the voltage-stabilized direct current to the battery module.

Optionally, the piezoelectric power generation device includes a first electrode layer, a second electrode layer, and a first piezoelectric film disposed between the two electrode layers, where the first piezoelectric film has a crystal structure, and a lattice space of the crystal structure is an asymmetric structure, and a direction in which piezoelectric polarization occurs in a lattice is parallel to a direction in which a plane of the first piezoelectric film is located.

Optionally, at least one of the following is further laminated between the two electrode layers:

at least one layer of a second piezoelectric film having a strain-bearing limit weaker than that of the first piezoelectric film;

at least one layer of structural reinforcing film.

Optionally, the second piezoelectric film and the structure reinforcing film are sequentially laminated on two side surfaces of the first piezoelectric film.

The utility model further provides an intelligent terminal comprising the display device.

As described above, the display device provided by the utility model can be applied to an intelligent terminal, and the piezoelectric power generation device is arranged in the bending area of the flexible display panel, and the piezoelectric material layer in the piezoelectric power generation device converts bending mechanical energy into electric energy when the flexible display panel is bent and stores the electric energy in the battery module connected with the piezoelectric power generation device.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic hardware structure diagram of an intelligent terminal for implementing various embodiments of the present utility model;

fig. 2 is a schematic diagram of a communication network system according to an embodiment of the present utility model;

fig. 3 is a schematic view showing a structure of the display device according to the first embodiment when not folded;

fig. 4 is a schematic view showing a structure of the display device when folded according to the first embodiment;

fig. 5 is a schematic view showing a structure of a display device according to a second embodiment when not folded;

fig. 6 is a schematic structural view of a piezoelectric power generating device according to a third embodiment;

FIG. 7 is a schematic diagram of fatigue test results after coupling of a metal thin film and a flexible two-dimensional piezoelectric thin film;

fig. 8 is a schematic structural view of a piezoelectric power generating device according to a fourth embodiment;

fig. 9 is a schematic structural view of a piezoelectric power generating device according to a fifth embodiment;

fig. 10 is a schematic structural view of a piezoelectric power generating device according to a sixth embodiment;

fig. 11 is a schematic structural view of a piezoelectric power generating device according to a seventh embodiment.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments. Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with aspects of the utility model as detailed in the accompanying claims.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the utility model may have the same meaning or may have different meanings, the particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or", "and/or", "including at least one of", and the like, as used herein, may be construed as inclusive, or mean any one or any combination. For example, "including at least one of: A. b, C "means" any one of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C ", again as examples," A, B or C "or" A, B and/or C "means" any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the following description, suffixes such as "module", "part" or "unit" for representing elements are used only for facilitating the description of the present utility model, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.

The intelligent terminal may be implemented in various forms. For example, the smart terminals described in the present utility model may include smart terminals such as mobile phones, tablet computers, notebook computers, palm computers, personal digital assistants (Personal Digital Assistant, PDA), portable media players (Portable Media Player, PMP), navigation devices, wearable devices, smart bracelets, pedometers, and stationary terminals such as digital TVs, desktop computers, and the like.

The following description will be given taking a mobile terminal as an example, and those skilled in the art will understand that the configuration according to the embodiment of the present utility model can be applied to a fixed type terminal in addition to elements particularly used for a moving purpose.

Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present utility model, the mobile terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an a/V (audio/video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111. Those skilled in the art will appreciate that the mobile terminal structure shown in fig. 1 is not limiting of the mobile terminal and that the mobile terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

The following describes the components of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be used for receiving and transmitting signals during the information receiving or communication process, specifically, after receiving downlink information of the base station, processing the downlink information by the processor 110; and, the uplink data is transmitted to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, GSM (Global System of Mobile communication, global system for mobile communications), GPRS (General Packet Radio Service ), CDMA2000 (Code Division Multiple Access, 2000, CDMA 2000), WCDMA (Wideband Code Division Multiple Access ), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time Division synchronous code Division multiple access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution, frequency Division duplex long term evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution, time Division duplex long term evolution), and 5G, among others.

WiFi belongs to a short-distance wireless transmission technology, and a mobile terminal can help a user to send and receive e-mails, browse web pages, access streaming media and the like through the WiFi module 102, so that wireless broadband Internet access is provided for the user. Although fig. 1 shows a WiFi module 102, it is understood that it does not belong to the necessary constitution of a mobile terminal, and can be omitted entirely as required within a range that does not change the essence of the utility model.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the mobile terminal 100. The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive an audio or video signal. The a/V input unit 104 may include a graphics processor (Graphics Processing Unit, GPU) 1041 and a microphone 1042, the graphics processor 1041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphics processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound into audio data. The processed audio (voice) data may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting the audio signal.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor, optionally, the ambient light sensor may adjust the brightness of the display panel 1061 according to the brightness of ambient light, and the proximity sensor may turn off the display panel 1061 and/or the backlight when the mobile terminal 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for applications of recognizing the gesture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; as for other sensors such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that may also be configured in the mobile phone, the detailed description thereof will be omitted.

The display unit 106 is used to display information input by a user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the mobile terminal. Alternatively, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 1071 or thereabout by using any suitable object or accessory such as a finger, a stylus, etc.) and drive the corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Optionally, the touch detection device detects the touch azimuth of the user, detects a signal brought by touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 110, and can receive and execute commands sent from the processor 110. Further, the touch panel 1071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 107 may include other input devices 1072 in addition to the touch panel 1071. Alternatively, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, mouse, joystick, etc., as specifically not limited herein.

Alternatively, the touch panel 1071 may overlay the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or thereabout, the touch panel 1071 is transferred to the processor 110 to determine the type of touch event, and the processor 110 then provides a corresponding visual output on the display panel 1061 according to the type of touch event. Although in fig. 1, the touch panel 1071 and the display panel 1061 are two independent components for implementing the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 may be integrated with the display panel 1061 to implement the input and output functions of the mobile terminal, which is not limited herein.

The interface unit 108 serves as an interface through which at least one external device can be connected with the mobile terminal 100. For example, the external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

Memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, and alternatively, the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor, the application processor optionally handling mainly an operating system, a user interface, an application program, etc., the modem processor handling mainly wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power supply 111 (e.g., a battery module) for supplying power to the respective components, and preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, so as to perform functions of managing charging, discharging, and power consumption management through the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described herein.

In order to facilitate understanding of the embodiments of the present utility model, a communication network system on which the mobile terminal of the present utility model is based will be described below.

Referring to fig. 2, fig. 2 is a schematic diagram of a communication network system according to an embodiment of the present utility model, where the communication network system is an LTE system of a general mobile communication technology, and the LTE system includes a UE (User Equipment) 201, an e-UTRAN (Evolved UMTS Terrestrial Radio Access Network ) 202, an epc (Evolved Packet Core, evolved packet core) 203, and an IP service 204 of an operator that are sequentially connected in communication.

Alternatively, the UE201 may be the terminal 100 described above, which is not described here again.

The E-UTRAN202 includes eNodeB2021 and other eNodeB2022, etc. Alternatively, the eNodeB2021 may connect with other enodebs 2022 over a backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide access for the UE201 to the EPC 203.

EPC203 may include MME (Mobility Management Entity ) 2031, hss (Home Subscriber Server, home subscriber server) 2032, other MMEs 2033, SGW (Serving Gate Way) 2034, pgw (PDN Gate Way) 2035 and PCRF (Policy and Charging Rules Function, policy and tariff function entity) 2036, and so on. Optionally, MME2031 is a control node that handles signaling between UE201 and EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location registers (not shown) and to hold user specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034 and PGW2035 may provide IP address allocation and other functions for UE201, PCRF2036 is a policy and charging control policy decision point for traffic data flows and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem ), or other IP services, etc.

Although the LTE system is described above as an example, it should be understood by those skilled in the art that the present utility model is not limited to LTE systems, but may be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G, and future new network systems (e.g., 6G), etc.

Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present utility model are presented.

First embodiment

Referring to fig. 3 and 4, fig. 3 is a schematic structural view of the display device according to the first embodiment when not folded, and fig. 4 is a schematic structural view of the display device according to the first embodiment when folded; the display device provided by the embodiment of the utility model comprises a flexible display panel 310, a battery module (not shown in the figure) and a piezoelectric power generation device 320.

The piezoelectric power generation device 320 is disposed on the bending region 301 of the flexible display panel 310, and the piezoelectric material layer in the piezoelectric power generation device 320 is used for converting bending mechanical energy into electrical energy when the flexible display panel 310 is bent; the battery module is electrically connected to the piezoelectric power generating device 320, and is used for storing the electric energy generated by the piezoelectric power generating device 320.

Optionally, the display device further includes a carrier plate 330 provided with a hollowed-out area, where the carrier plate 330 may be made of a titanium alloy material with relatively high rigidity, so as to assist the piezoelectric power generation device 320 to bear a certain strain pressure, and the carrier plate 330 is adhered to the flexible display panel 310 by an adhesive layer 340, and the piezoelectric power generation device 320 is disposed on a surface of the carrier plate 330 facing away from the flexible display panel 310. As shown in fig. 3, the hollowed-out area overlaps the bending area 301, and a through hole penetrating along the thickness direction of the carrier plate 330 is provided at the middle part of the hollowed-out area to accommodate the larger deformation generated at the middle part of the bending area 301 during bending, and since the deformation amount generated at the two side parts of the bending area 301 during bending is smaller, blind holes which do not penetrate along the thickness direction of the carrier plate 330 can be provided at the two side parts of the hollowed-out area, so that the carrier plate 330 can assist the piezoelectric power generation device 320 to bear a certain strain pressure and reduce the deformation amount generated at the bending area 301.

Optionally, the display device further includes a first housing 360 and a second housing 370 connected by a rotation shaft 350; the piezoelectric power generation device 320 is disposed at a side facing away from the carrier plate 330, is fixed to the first and second cases 360 and 370 by the first colloid 380, and is located between the first and second cases 360 and 370. The first and second housings 360 and 370 are adhered to the carrier 330 at the first and second non-folded regions 302 and 303 by the second glue 390.

Optionally, the display device further includes an electrical connection portion for electrically connecting the piezoelectric power generating device 320 and the battery module, and the electrical connection portion further includes a rectifying and voltage stabilizing circuit, where the rectifying and voltage stabilizing circuit is configured to convert alternating current generated by the piezoelectric power generating device 320 into voltage-stabilized direct current and transmit the voltage-stabilized direct current to the battery module.

Second embodiment

The display device according to the second embodiment of the present utility model is different from the first embodiment in that the bending region bends along the first direction under the action of an external force, and at least two piezoelectric power generating devices are arranged along the first direction.

Alternatively, the piezoelectric power generating devices are symmetrically arranged about an axis of symmetry of the bending region.

Specifically, referring to fig. 5, fig. 5 is a schematic structural diagram of a display device according to a second embodiment when the display device is unfolded; the display device of fig. 5 includes two piezoelectric power generating devices, namely, a first piezoelectric power generating device 321 and a second piezoelectric power generating device 322, where the first piezoelectric power generating device 321 and the second piezoelectric power generating device 322 are arranged in parallel in the bending region 301 and symmetrically arranged about the symmetry axis of the bending region 301. The number of the piezoelectric power generation devices can be increased or decreased according to the actual application, and the piezoelectric power generation devices can be connected in series or in parallel to achieve the required voltage and current, and meanwhile, the strain pressure of a single piezoelectric power generation device can be relieved by adding the piezoelectric power generation devices in parallel.

Third embodiment

Referring to fig. 6, fig. 6 is a schematic structural view of a piezoelectric power generating device according to a third embodiment; the piezoelectric power generation device in the embodiment of the utility model includes a first electrode layer 3201, a second electrode layer 3202, and a first piezoelectric film 3203 disposed between the two electrode layers, wherein the first piezoelectric film 3203 has a crystal structure, a lattice space of the crystal structure is an asymmetric structure, and a direction in which piezoelectric polarization occurs in a lattice is parallel to a direction in which a plane of the first piezoelectric film 3203 is located.

Specifically, the first electrode layer 3201 and the second electrode layer 3202 are metal films, and include at least one material of gold, platinum, silver, copper, nickel and chromium, and the thickness of the metal films is 30 nm-50 nm. The first piezoelectric film 3203 is a flexible two-dimensional piezoelectric film, and comprises at least one material of molybdenum disulfide, indium selenide and molybdenum diselenide, the lattice space of the crystal structure of the flexible two-dimensional piezoelectric film is an asymmetric structure, under the driving of external mechanical stress, the lattice of the crystal generates spontaneous polarization, charges are generated and released, and the direction of the piezoelectric polarization of the lattice is parallel to the direction of the plane of the first piezoelectric film 3203. The flexible two-dimensional piezoelectric film is bonded with the metal films of the first electrode layer 3201 and the second electrode layer 3202 by deposition with van der Waals force, and the bonding mode shows extremely strong stability under the cross-linking of the flexible piezoelectric film, so that the metal film cannot be completely broken even under the bending of multiple large strains, the occurrence of short circuit condition is reduced, and the metal film can always keep good conductive performance.

As shown in the fatigue test result after the metal film and the flexible two-dimensional piezoelectric film are coupled, the resistance of the power generation system of the piezoelectric power generation device can still be basically kept constant after tens of thousands of times of bending, so that the piezoelectric power generation device has longer service life when applied to the bending area of a folding screen mobile phone or other foldable display devices.

Through tests, the piezoelectric power generation device can continuously bend and continuously generate piezoelectric power generation charges close to a rule, and can stably generate power when the strain amount changes from 0.24% to 0.72%. When the flexible display panel is folded and bent, the bending angles are different, and the piezoelectric generating capacity is also different, namely, the larger the bending angle is, the larger the piezoelectric generating output amplitude is. Illustratively, when the characteristic parameters of the piezoelectric power generation device are: the piezoelectric coefficient of the first piezoelectric film is 80pm/V, the bending strain is 1.6%, the stress area of the bending area is 15cm x 2cm, the Young modulus of the first piezoelectric film is 120Gpa, and the piezoelectric film is calculated according to a piezoelectric material stress excitation piezoelectric current formula: i=d _ЗЗ EA epsilon, where I is the piezoelectric excitation current, d _ЗЗ The piezoelectric film has the piezoelectric coefficient of the piezoelectric film, E is the Young modulus of the piezoelectric film, A is the area of the piezoelectric film in a bending area corresponding to the folding screen, epsilon is the strain area of the piezoelectric film, the theoretical bending of the piezoelectric film can correspondingly output 0.46mA current, the amplitude of the piezoelectric output current is considerable, even if the electric quantity in a display device is completely exhausted under specific conditions, the flexible display panel can be bent and folded to realize charging emergency, the bending resistance and stretching resistance of the flexible two-dimensional piezoelectric film are better than those of the traditional piezoelectric film, and the piezoelectric film is used under the condition of large screen folding strain, so that the piezoelectric power generation device has stronger mechanical fatigue resistance and longer service life.

Fourth embodiment

The piezoelectric power generating device according to the fourth embodiment of the present utility model is different from the third embodiment in that at least one second piezoelectric film is further laminated between two electrode layers of the piezoelectric power generating device according to the present embodiment, and the strain tolerance limit of the second piezoelectric film is weaker than the strain tolerance limit of the first piezoelectric film.

Specifically, referring to fig. 8, fig. 8 is a schematic structural view of a piezoelectric power generating device according to a fourth embodiment; a second piezoelectric film 3204 is further disposed between the first electrode layer 3201 and the second electrode layer 3202, and the second piezoelectric film 3204 is a conventional piezoelectric film and comprises at least one material of lead zirconate titanate, polyvinylidene fluoride, zinc oxide and aluminum nitride, and the thickness of the second piezoelectric film is 200 nm-2 um. The traditional piezoelectric film and the flexible two-dimensional piezoelectric film are coupled to form the composite piezoelectric film layer, so that the toughness of the piezoelectric material layer is improved, and the fracture degree of the piezoelectric material layer when the piezoelectric power generation device is bent to a large extent is reduced.

Fifth embodiment

The piezoelectric power generating device according to the fifth embodiment of the present utility model is different from the above-described third embodiment in that at least one structural reinforcing film is further laminated between two electrode layers of the piezoelectric power generating device in the present embodiment.

Specifically, referring to fig. 9, fig. 9 is a schematic structural view of a piezoelectric power generating device according to a fifth embodiment; a structural reinforcing film 3205 is further provided between the first electrode layer 3201 and the second electrode layer 3202. The structure-enhancing film 3205 is a graphene film, and the combination of the graphene film and the first piezoelectric film 3203 can increase toughness and conductivity of the piezoelectric material layer.

Sixth embodiment

The piezoelectric power generating device according to the sixth embodiment of the present utility model is different from the fourth embodiment in that at least one structure-enhancing film is further laminated between the electrode layer and the second piezoelectric film of the piezoelectric power generating device according to the present embodiment.

Specifically, referring to fig. 10, fig. 10 is a schematic structural view of a piezoelectric power generating device according to a sixth embodiment; a structure enhancing film 3205 is further disposed between the second electrode layer 3202 and the second piezoelectric film 3204, and the toughness of the piezoelectric material layer is improved by coupling the conventional piezoelectric film and the flexible two-dimensional piezoelectric film to form a composite piezoelectric film layer, and meanwhile, the conductivity of the piezoelectric material layer is increased by the graphene film.

Seventh embodiment

The piezoelectric power generating device according to the seventh embodiment of the present utility model is different from the third embodiment in that the piezoelectric power generating device according to the present embodiment is provided with a second piezoelectric film and a structure-enhancing film sequentially laminated on both side surfaces of the first piezoelectric film.

Specifically, referring to fig. 11, fig. 11 is a schematic structural view of a piezoelectric power generating device according to a seventh embodiment; the piezoelectric power generating device shown in fig. 11 is provided with a first piezoelectric film 3203, two second piezoelectric films 3204, and a two-layer structure reinforcing film 3205 between a first electrode layer 3201 and a second electrode layer 3202. Wherein, two layers of second piezoelectric films 3204 are respectively disposed on two side surfaces of the first piezoelectric film 3203, and two layers of structural reinforcement films 3205 are respectively disposed between the two layers of second piezoelectric films 3204 and the first electrode layer 3201 and the second electrode layer 3202. The two layers of traditional piezoelectric films and the flexible two-dimensional piezoelectric film are coupled to form the composite piezoelectric film layer, so that the power generation efficiency of the piezoelectric material layer is improved, the toughness of the piezoelectric material layer can be improved by combining the composite piezoelectric film layer with the graphene films on two sides, and the conductivity of the piezoelectric material layer can be improved.

In the embodiment of the intelligent terminal provided by the utility model, all technical features of any one of the embodiments of the display device can be included, and the expansion and explanation contents of the description are basically the same as those of each embodiment of the display device, and are not repeated here.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

The units in the device of the embodiment of the utility model can be combined, divided and deleted according to actual needs.

In the present utility model, the same or similar term concept, technical solution and/or application scenario description will be generally described in detail only when first appearing and then repeatedly appearing, and for brevity, the description will not be repeated generally, and in understanding the present utility model technical solution and the like, reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution and/or application scenario description and the like which are not described in detail later.

In the present utility model, the descriptions of the embodiments are emphasized, and the details or descriptions of the other embodiments may be referred to.

The technical features of the technical scheme of the utility model can be arbitrarily combined, and all possible combinations of the technical features in the above embodiment are not described for the sake of brevity, however, as long as there is no contradiction between the combinations of the technical features, the utility model shall be considered as the scope of the description of the utility model.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the utility model, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. A display device, comprising a flexible display panel, a battery module, and at least one piezoelectric power generation device;

2. The display device of claim 1, wherein the display device comprises a display device,

the bending region bends along a first direction under the action of external force, and at least two piezoelectric power generation devices are arranged along the first direction.

3. The display device of claim 2, wherein the display device comprises a display device,

the piezoelectric power generation devices are symmetrically arranged about the symmetry axis of the bending region.

4. The display device according to claim 1, further comprising a carrier plate provided with a hollowed-out area, the carrier plate being bonded to the flexible display panel, and the hollowed-out area overlapping the bending area;

5. The display device according to claim 4, further comprising a first housing and a second housing connected by a rotation shaft;

6. The display device according to claim 1, further comprising an electrical connection portion for electrically connecting the piezoelectric power generating device and the battery module, wherein the electrical connection portion further comprises a rectifying and voltage stabilizing circuit for converting alternating current generated by the piezoelectric power generating device into voltage-stabilized direct current and transmitting the voltage-stabilized direct current to the battery module.

7. The display device of claim 1, wherein the display device comprises a display device,

the piezoelectric power generation device comprises a first electrode layer, a second electrode layer and a first piezoelectric film arranged between the two electrode layers, wherein the first piezoelectric film is provided with a crystal structure, the lattice space of the crystal structure is of an asymmetric structure, and the direction of piezoelectric polarization of a lattice is parallel to the direction of a plane where the first piezoelectric film is located.

8. The display device of claim 7, wherein the display device comprises a display device,

at least one of the following is also laminated between the two electrode layers:

at least one layer of structural reinforcing film.

9. The display device of claim 8, wherein the display device comprises a display device,

the second piezoelectric film and the structure reinforcing film are sequentially laminated on the surfaces of two sides of the first piezoelectric film.

10. An intelligent terminal comprising the display device of any one of claims 1 to 9.