WO2020253141A1

WO2020253141A1 - Electronic device

Info

Publication number: WO2020253141A1
Application number: PCT/CN2019/123315
Authority: WO
Inventors: 黄维财; 杨建新; 张婵
Original assignee: 海信视像科技股份有限公司
Priority date: 2019-06-17
Filing date: 2019-12-05
Publication date: 2020-12-24
Also published as: CN215453262U; CN112104957A

Abstract

Provided in the present application is an electronic device, comprising a display screen and at least one excitation structure, wherein a first part of each is fitted on a non-display side surface of the display screen, a second part and the first part are spaced apart opposite to each other, and the second part may enable the first part to drive the display screen to vibrate and emit sound in a non-contact scenario. The electronic device provided in the present application can be used to excite a rigid display screen to vibrate and emit sound, and may further be used to excite a flexible display screen to vibrate and emit sound.

Description

Electronic equipment

Cross reference to related applications

This patent application claims the priority of the Chinese patent application filed on June 17, 2019 with the application number 201910521659.4, the full text of which is incorporated herein by reference.

Technical field

This application relates to electronic technology, in particular to an electronic device.

Background technique

With the continuous development of electronic technology and the continuous improvement of customer demand, electronic devices continue to develop in the direction of large size, lighter and thinner, such as mobile phones, tablet computers, TVs and other electronic devices. While it is necessary to ensure that the overall electronic devices are lighter and thinner, It is also necessary to install sound-producing devices such as speakers inside the electronic equipment. Due to the limitation of the internal space of the electronic equipment, the installation position space for the speakers is small, so that the speakers installed in the electronic equipment can usually only meet the ordinary playback function, and cannot achieve more sound effects such as heavy bass, resulting in the speaker The playback performance is poor.

In some technologies, the electronic device uses the "flat-panel sound technology" to install an electromagnetic exciter behind the screen displayed on the electronic device's display screen. Under the action of the electromagnetic exciter, the display screen generates sound through bending waves emitted by vibration. That is, the display screen in the electronic device can be used for display and can be used to replace the speaker for sound. Therefore, there is no need to set an installation position for the speaker in the electronic device, so as to realize a lighter and thinner design of the electronic device. Among them, the electromagnetic exciter, after receiving the electrical signal corresponding to the content to be displayed, converts the electrical signal into mechanical vibration, and directly acts on the display screen, so that the display screen generates bending waves under the action of the electromagnetic exciter, and the bending wave Vibrate back and forth under the action of

However, in the existing electronic equipment, the sound generation method that directly stimulates the hard display screen through the electromagnetic exciter cannot be applied to the flexible display screen, resulting in the relatively high application scenarios of electronic equipment that can emit sound on the display screen in related technologies. single.

Summary of the invention

The present application provides an electronic device that stimulates the display screen of the electronic device to emit sound through a non-contact excitation structure, thereby making the use of the electronic device more diverse, and can be used in electronic devices with flexible display screens and hard display screens. Both can be applied.

The present application provides an electronic device, including: a display screen and at least one excitation structure; each of the excitation structures includes: a first part and a second part; wherein the first part is attached to the non-display provided on the display screen On the side surface, the first part and the second part are arranged oppositely, and there is a gap between the first part and the second part; the second part is used to make the first part drive the display The screen vibrates and sounds.

In an embodiment of the present application, it further includes: an optical film; the display is a liquid crystal screen, the first part is attached to the surface of the non-display side of the liquid crystal screen, and the second part is attached to On the display side surface of the optical film.

In an embodiment of the present application, the display screen is an OLED screen; the OLED screen includes: an array substrate and a packaging substrate that are attached and arranged; the array substrate includes: a base substrate that is attached and arranged, a TFT array, and an anode , A light-emitting function layer and a cathode; the packaging substrate includes: a color filter layer, the color filter layer is attached to the cathode; the at least one excitation structure is arranged on the side of the base substrate of the OLED screen.

In an embodiment of the present application, the display screen is a laser projection screen; the laser projection screen includes: a backplane, a light-shielding layer, and a diaphragm that are attached and arranged; the at least one excitation structure is arranged on the laser projection screen Side of the back panel.

In an embodiment of the present application, the laser projection screen is a hard screen; or, the laser projection screen is a soft screen, wherein the electronic device further includes an elastic suspension material for fixing the soft screen.

In an embodiment of the present application, the first part includes: a printed coil; the printed coil includes a plurality of wire groups;

The second part includes: a magnetically permeable bottom plate and a plurality of permanent magnet pieces; the plurality of permanent magnet pieces are attached to one side of the magnetically permeable bottom plate, and the lines of magnetic force between the magnetic poles of each permanent magnet piece Both are perpendicular to the magnetically conductive bottom plate, and the magnetic poles of the two adjacent permanent magnet pieces are arranged in opposite directions;

The magnetically conductive bottom plate is provided with a permanent magnet piece on one side opposite to the printed coil, and the center line between two adjacent wire groups in the plurality of wire groups is connected to one of the permanent magnet pieces. The magnet pieces are arranged opposite to each other, and the center line between adjacent ones of the permanent magnet pieces is arranged opposite to one of the plural wire groups, and the permanent magnet pieces are not connected to the printing Coil contact

When the printed coil is energized and the direction of current between two adjacent wire groups is opposite, a plurality of the permanent magnet pieces are used to make the printed coil drive the display screen to vibrate and sound.

In an embodiment of the present application, the printed coil includes at least one wire; wherein, each wire is wound in the same way one or more times to obtain the printed coil, and each wire is wound every time Set time to pass through all the wire groups.

In an embodiment of the present application, when the printed coil is connected to the first current, a plurality of the permanent magnet sheets are used to cause the printed coil to drive the display screen to move in a direction close to the magnetic conductive bottom plate ；

When the printed coil is connected to the second current, the plurality of permanent magnet sheets are used to make the printed coil drive the display screen to move away from the magnetic conductive bottom plate;

Wherein, for each wire group in the printed coil, the current direction of the wire group is different when the printed coil is connected to the first current and the second current.

In an embodiment of the present application, the vibration amplitude of the display screen is positively correlated with the current in the printed coil; the vibration frequency of the display screen is related to the sum of the first current connected to the printed coil The frequency of switching between the second currents is positively correlated.

In an embodiment of the present application, in the at least one excitation structure, a plurality of permanent magnet pieces corresponding to each excitation structure are arranged on the same magnetically permeable base plate.

In summary, the present application provides an electronic device including a display screen and at least one excitation structure, wherein the first part of each is attached to the non-display side surface of the display screen, the second part is arranged opposite to the first part at intervals, and the first part The second part can make the first part drive the display screen to vibrate and sound without contact. The electronic device provided in the present application can be used to excite a hard display screen to vibrate and sound, and can also be used to excite a flexible display screen to vibrate and sound, thereby enriching the application scenarios of electronic devices.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings that need to be used in the description of the embodiments or related technologies. Obviously, the drawings in the following description are merely present For some of the embodiments of the application, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative labor.

Figure 1 is a schematic structural diagram of an electronic device with a speaker;

Figure 1a is a schematic diagram of an electronic device with an independent power supply board;

Figure 1b is a schematic diagram of the structure of the LCD screen;

Figure 1c is a schematic diagram of the structure of an OLED screen;

Figure 1d is a schematic diagram of the structure of a laser projection screen;

Figure 2 is a schematic diagram of a disassembled structure of an electronic device;

Figure 3 is a schematic cross-sectional structure diagram of an electronic device;

FIG. 4 is a schematic structural diagram of an electronic device with a display screen capable of producing sound in the related art;

FIG. 5 is a schematic structural diagram of another electronic device with a display screen capable of producing sound in the related art;

FIG. 6 is a schematic structural diagram of another electronic device with a display screen capable of producing sound in the related art;

FIG. 7 is a schematic structural diagram of an embodiment of an electronic device provided by this application;

FIG. 8 is a schematic structural diagram of an embodiment of an electronic device provided by this application;

FIG. 9 is a schematic structural diagram of an embodiment of an electronic device provided by this application;

FIG. 10 is a schematic structural diagram of an embodiment of an electronic device provided by this application;

FIG. 11 is a detailed structural diagram of an embodiment of the electronic device provided by this application;

FIG. 12 is a schematic structural diagram of another embodiment of an electronic device provided by this application;

FIG. 13 is a schematic diagram of a disassembled structure of an embodiment of an electronic device provided by this application;

14 is a schematic cross-sectional structure diagram of an embodiment of an electronic device provided by this application;

15 is a detailed schematic diagram of a cross-section of an embodiment of an electronic device provided by this application;

FIG. 16 is a schematic diagram of the magnetic pole directions of a plurality of permanent magnet pieces provided by this application;

FIG. 17 is a schematic diagram of the first state of the electronic device provided by this application;

18 is a schematic diagram of the second state of the electronic device provided by this application;

FIG. 19 is a schematic structural diagram of an embodiment of a printed coil provided by this application;

20 is a schematic structural diagram of an embodiment of an elastic suspension material for electronic equipment provided by this application;

FIG. 21 is a schematic structural diagram of another embodiment of an elastic suspension material for an electronic device provided by this application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein, for example, can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

FIG. 1 is a schematic structural diagram of an electronic device with a speaker. The electronic device shown in FIG. 1 takes a TV 1 as an example. The TV 1 includes a display screen 11, a speaker 12, and a speaker 13; among them, the speaker 12 and the speaker 13 is arranged behind the display screen 11 inside the television 1. The speaker 12 and the speaker 13 are respectively arranged on the left and right sides of the direction in which the user views the display screen 11, and respectively provide left and right channel sounds.

For example, taking an electronic device provided with an independent power supply board as an example, the structure of the electronic device is described, see Figure 1a, which is a schematic diagram of the structure of an electronic device provided with an independent power supply board, as shown in Figure 1a. The device includes a panel 101, a backlight assembly 102, a main board 103, a power supply board 104, a rear case 105 and a base 106. Among them, the panel 101 is used to present images to the user; the backlight assembly 102 is located below the panel 101, usually some optical components, used to supply sufficient brightness and uniformly distributed light sources, so that the panel 101 can display images normally, the backlight assembly 102 also Including the backplane 1021, the main board 103 and the power supply board 104 are arranged on the backplane 1021, usually some convex structures are stamped on the backplane 1021, the main board 103 and the power supply board 104 are fixed on the convex package by screws or hooks; the rear shell 105 The cover is arranged on the panel 101 to hide the display device components such as the backlight assembly 102, the main board 103, and the power supply board 104 to achieve a beautiful effect; the base 106 is used to support the display device.

In some embodiments, the backlight assembly 102 is not necessary, for example, an OLED display device.

With the gradual development of users’ demand for electronic devices in the market towards lighter and thinner, and the continuous advancement of electronic technology, more and more key components such as display screens and base frames in electronic devices can be realized with thinner thicknesses. Reduce the overall thickness of electronic equipment. Display screens currently used in electronic devices usually include: Liquid Crystal Display (LCD) screens, Organic Light-Emitting Diode (OLED) screens, and laser projection screens.

For example, FIG. 1b is a schematic diagram of the structure of an LCD screen. As shown in FIG. 1b, the LCD screen 11 includes: a liquid crystal screen 111, an optical film 112, a light guide plate 113, a lamp 114, and a back plate 115. The above structure can be covered by a rear shell 116. It is assumed that the light emitting direction of the LCD screen 11 is the direction indicated by the upward arrow in the figure, that is, the display side of the LCD screen 11.

For example, FIG. 1c is a schematic diagram of the structure of an OLED screen. As shown in FIG. 1c, the OLED screen 11 includes: an array substrate 122 and a packaging substrate 121; wherein, the array substrate 122 includes in turn: a base substrate 1225, a TFT array 1224, an anode 1223, The light-emitting function layer 1222 and the cathode 1221, and the packaging substrate 121 includes a color filter layer composed of a red filter pattern (R), a green filter pattern (G) and a blue filter pattern (B). The light emitting direction of the OLED screen 11 is the direction indicated by the upward arrow in the figure, that is, the display side of the OLED screen 11.

For example, FIG. 1d is a schematic structural diagram of a laser projection screen. As shown in FIG. 1d, the laser projection screen 11 includes a back plate 133, a light shielding layer 132, and a diaphragm 131. The laser projection screen 11 can be a soft screen or a hard screen; The light emitting direction of the laser projection screen 11 is the direction indicated by the upward arrow in the figure, that is, the display side of the laser projection screen 11.

Therefore, in the TV 1 shown in Fig. 1, due to the need to accommodate the display screen shown in Figs. 1b-1d, the space reserved for speakers is getting smaller and smaller, and the manufacturer of the TV 1 can only reduce The speaker's heavy bass and other functions can reduce the space occupied by the speaker in the TV 1. As a result, the speakers 12 and the speakers 13 installed in the television 1 can only meet the ordinary playback function, and cannot achieve more sound effects, which reduces the playback performance of the television 1.

Based on the poor playback performance of the speakers built into the existing electronic devices, and the electronic devices have strong positional limitations when setting up the speakers, some electronic devices in the technology have "sound-producing screens", which can be excited by electromagnetic excitation. The monitor enables the display to sound. For example, refer to FIGS. 2 and 3. FIG. 2 is a schematic diagram of a disassembled structure of an electronic device, and FIG. 3 is a schematic diagram of a cross-sectional structure of an electronic device.

Wherein, the electronic device shown in FIG. 2 and FIG. 3 includes: a display screen 11 and at least one electromagnetic exciter 14. Two electromagnetic exciters 14 are taken as an example in the figure. The display screen 11 can be used to display video or image content corresponding to the optical signal; under the action of the electromagnetic exciter 14, the display screen 11 generates sound through bending waves emitted by vibration. That is, the display screen in the electronic device can be used for display and can be used to replace the speaker for sound. Therefore, there is no need to set installation positions for the speaker 12 and the speaker 13 in the electronic device as shown in FIG. 1, and there is no need for the user to connect the speaker externally, thereby achieving a lighter and thinner design of the electronic device. At the same time, the above-mentioned electronic equipment can produce sound through the display screen 11 as a whole. A larger sounding device can bring stronger sound effects such as heavy bass, so that the electronic equipment can also have stronger playback performance.

For example, FIG. 4 is a structural schematic diagram of an electronic device with a display screen capable of producing sound in the related art. In the embodiment shown in FIG. 4, the electronic device includes: a display screen 11, an electromagnetic actuator 14 and a bottom cover 15. The display screen 11 may be an OLED screen, and the electromagnetic exciter 14 is arranged on the bottom cover 15 and vibrates under the action of an electric signal and directly acts on the non-display side of the display screen 11, causing the display screen 11 to vibrate and produce sound.

FIG. 5 is a schematic structural diagram of another electronic device capable of producing sound on a display screen in the related art. The electronic device shown in FIG. 5 includes: a display screen 11, a transmission rod 16 and an electromagnetic exciter 14. The display screen 11 may be Laser projection screen. Among them, the electromagnetic exciter is used to convert sound electrical signals into mechanical vibrations. Since the transmission rod 16 abuts the display panel 11, the vibration driving force generated by the electromagnetic exciter 14 can directly drive the display screen 11 to vibrate and produce sound through the rigid transmission rod 16.

Fig. 6 is a schematic structural diagram of another electronic device with a display screen capable of producing sound in the related art. In the electronic device shown in Fig. 6, a screen suspension bracket 17 and an elastic suspension system 18 are used to suspend the display screen 11, and an electromagnetic exciter After 14 is integrated with the auxiliary sounding board 19, one end of the whole is connected to the display screen 11, and the other end is connected to the screen suspension bracket 17. The electromagnetic exciter 14 generates vibration under the action of the electric signal, and directly acts on the display screen 11 to make the display screen 11 vibrate and produce sound.

To sum up, in the electronic devices shown in Figure 4-6, the screen of the electronic device has the design characteristics of ultra-thin form and simple structure through the sound-producing technology of the display screen, which solves the traditional electronic device display screen. There are many problems such as limited speaker position, inconvenient use, and separation of display picture and sound.

In some embodiments of the present application, it can be seen from Figures 4-6 that in order to realize the vibration and sound of the display screen, the electronic equipment in the related art needs to set the electromagnetic exciter to directly contact the display screen in order to be excited by the electromagnetic excitation. After the vibration of the monitor is generated, it is transmitted to the display screen through mechanical hard transfer and stimulates the display screen to vibrate and produce sound.

However, this type of excitation method in which the electromagnetic exciter directly contacts the display screen, although simple to implement, can directly act on most hard display screens and excite the hard display screen to vibrate and produce sound through vibration. Wherein, the hard display screen includes: an organic light-emitting diode (Organic Light-Emitting Diode, OLED for short) screen and the like. As more and more electronic devices use flexible display screens, if a flexible display screen capable of sounding is required, the mechanically hard vibration transmission method used by the electromagnetic exciter cannot directly act on the flexible display screen. As a result, the existing electromagnetic exciter as shown in Figs. 4-6 cannot be applied to electronic equipment using a flexible screen, and cannot make the flexible screen vibrate and sound.

Even if the electromagnetic exciter as shown in Figure 4-6 is installed on the flexible display screen, it will be impossible to ensure that the flexible display screen and the electromagnetic exciter remain on the same plane due to errors such as structural installation. The electromagnetic exciter will be at the boundary when it is not vibrating. When the electromagnetic exciter is vibrating, the vibration directly acts on the flexible display. When the vibration directly transmitted by the electromagnetic exciter is severe, it may also bring structure to the flexible display. Sexual damage.

Therefore, the electronic devices in the related art as shown in Figs. 4-6 all use electromagnetic exciters to directly excite the hard display screen, which cannot be applied to the flexible display screen. The application scenarios of electronic devices are relatively single. In addition, in the related art, there is no way that the LDC display screen can produce sound in electronic devices that use the LCD display screen.

Based on the deficiencies in the above-mentioned related technologies, the present application provides an electronic device, by setting a non-contact excitation structure to stimulate the display screen of the electronic device to emit sound, thereby making the electronic device more diverse and flexible Display, or have a hard display.

Among them, the electronic device provided by this application includes: a display screen and at least one excitation structure. Among them, each excitation structure includes a first part and a second part that are independently arranged. Moreover, the first part is attached to the non-display side surface of the display screen, and the first part and the second part are arranged oppositely with a gap. The second part of each excitation structure can be used to make the opposite first part drive the display screen to vibrate and sound.

The technical solution of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

In some embodiments of the present application, the display screen of the electronic device may be an LCD screen. For any excitation structure in the electronic device, the first part may be attached to the surface of the non-display side of the LCD screen, and the second The part can be laminated on the display side surface of the optical film.

For example, FIG. 7 is a schematic structural diagram of an embodiment of an electronic device provided by this application. The display screen 11 shown in FIG. 7 is an LCD screen. For the excitation structure 10, the first part 101 is attached and arranged under the LCD screen 111. That is, on the non-display side surface; its second part 102 is attached and arranged above the optical film 112, that is, on the display side surface. Moreover, the first part 101 and the second part 102 are arranged oppositely, and there is an interval between them and they do not directly contact. In some embodiments of the present application, for an electronic device having an LCD screen as shown in FIG. 7, the excitation structure 10 made of a transparent material may be selected, so that the normal display of the LCD screen is not blocked.

In some embodiments of the present application, the display screen of the electronic device may be an OLED screen. For any excitation structure in the electronic device, the first part may be attached to the non-display side surface of the base substrate of the OLED screen. on.

For example, FIG. 8 is a schematic structural diagram of an embodiment of an electronic device provided by this application. The display screen 11 shown in FIG. 8 is an OLED screen. For the excitation structure 10, the first part 101 can be attached to the base substrate 1225. Below, that is, on the non-display side surface; and the second part 102 and the first part 101 are arranged oppositely, and there is an interval between them and they do not directly contact. In some embodiments of the present application, the second part 102 may be attached to the surface of the rear shell of the electronic device disposed under the OLED screen 11.

In some embodiments of the present application, the display screen of the electronic device may be a laser projection screen. For any excitation structure in the electronic device, the first part may be attached to the non-display side of the back plate of the laser projection screen. On the surface.

For example, FIG. 9 is a schematic structural diagram of an embodiment of an electronic device provided by this application. The display screen 11 shown in FIG. 9 is a laser projection screen. For the excitation structure 10, the first part 101 can be attached to the back plate 1225. Below, that is, on the non-display side surface; and the second part 102 and the first part 101 are disposed oppositely, and there is an interval between them and they do not directly contact. In some embodiments of the present application, the second part 102 may be attached to the surface of the rear shell of the electronic device disposed under the laser projection screen 11.

In the embodiment shown in FIGS. 7-9, only the positional relationship between any excitation structure 10 and the display screen 11 in the electronic device is shown, and the electronic device may be on the same display screen 11 in practical applications. Simultaneously set up multiple excitation structures. For example, due to the requirement of setting the left and right sound channels of the played sound, multiple excitation structures may be respectively arranged in the left and right directions of the electronic device to realize the left and right sound channels of the electronic device.

In some embodiments of the present application, FIG. 10 is a schematic structural diagram of an embodiment of the electronic device provided by this application. In the electronic device shown in FIG. 10, the user can watch the displayed content through the display screen 11 of the electronic device. At the same time, since the sound played by the electronic device needs to be set in the left and right channels, the first excitation structure 10(1) is set on the left side of the same height of the electronic device with the user’s viewing direction as the center. A second excitation structure 10(2) is provided on the right.

Specifically, FIG. 11 is a detailed structural diagram of an embodiment of the electronic device provided by this application. FIG. 11 shows a specific implementation of the electronic device in the embodiment shown in FIG. 10, wherein the left and right sides of the electronic device Each excitation structure is independently provided. The first excitation structure 10(1) on the left includes: a first part 101(1) and a second part 102(1), and the second excitation structure 10(2) on the right includes: a first part 101(2) and the second part 102(2). The first excitation structure 10(1) and the second excitation structure 10(2) on the left and right sides can separately or simultaneously excite the display screen 11 to vibrate and produce sound.

In some embodiments of the present application, in another embodiment of the present application having an electronic device, if the electronic device includes a plurality of excitation structures, each excitation structure can be provided with a first part separately, and the second part can be set in On the same magnetic base plate.

For example, FIG. 12 is a schematic structural diagram of another embodiment of an electronic device provided by this application. The electronic device as shown in FIG. 12 includes three excitation structures. The figure shows the first parts 101(1), 101(2) and 101(3) respectively attached to the display screen 11. Among them, the second part 102 opposite to the first part of the three excitation structures uses the same magnetically permeable bottom plate.

Based on the above embodiments of the electronic device shown in FIGS. 7-12, the excitation structure in the electronic device provided by the present application and the manner in which the excitation structure excites the display screen to vibrate and sound will be described below in conjunction with the accompanying drawings.

Specifically, FIG. 13 is a schematic diagram of a disassembled structure of an embodiment of an electronic device provided by this application, and FIG. 14 is a schematic diagram of a cross-sectional structure of an embodiment of an electronic device provided by this application.

As shown in FIG. 13 and FIG. 14, the electronic device provided in this embodiment includes: a display screen 11 and at least one excitation structure 10. Wherein, at least one excitation structure 10 is arranged on the non-display side of the display screen 11, wherein the first part 101 of each excitation structure 10 is attached to the non-display side surface of the display screen 11, and the second part 102 is opposite to the first part. Set and there is a gap.

In the first aspect, the display screen 11 of the electronic device is used to realize the display function of the electronic device, and is used to receive and display the video or image content corresponding to the optical signal. Specifically, the display screen 11 provided in this embodiment includes: a liquid crystal display (Liquid Crystal Display, abbreviated as LCD), an organic light-emitting diode (Organic Light-Emitting Diode, abbreviated as: OLED), or a laser projection hard screen. In this embodiment, the display screen 11 of the electronic device has a rectangular structure as an example for description, rather than limiting it. For example, the display screen 11 may also have an arc structure.

In the second aspect, at least one excitation structure 10 of the electronic device can be used to excite the display screen 11 to vibrate, so as to realize the sound function of the electronic device. Taking any excitation structure 10 in the figure as an example, the second part 102 of the excitation structure 10 provided in this embodiment includes: a magnetically permeable base plate 1022 and a plurality of permanent magnet sheets 1021, and the first part 101 includes: a printed coil 101. Among them, only the printed coil 101 in the excitation structure 10 is in contact with the display screen 11 and is attached to the non-display side of the display screen 11; and the magnetically permeable bottom plate 1022 and the plurality of permanent magnet sheets 1021 in the second part 102 of the excitation structure 10 None of them are in contact with the display screen 11 and the printed coil 101. In some embodiments of the present application, the surface area of the magnetic bottom plate 1022 in the excitation structure 10 in this embodiment is less than or equal to the surface area of the display screen 11.

Specifically, FIG. 15 is a detailed schematic cross-sectional view of an embodiment of the electronic device provided by the application. As shown in FIG. 15, the magnetically conductive base plate 1022 in the excitation structure 10 is provided with a side of a plurality of permanent magnet pieces 1021, and the excitation structure 10 The printed coils 101 are arranged oppositely. In some embodiments of the present application, the magnetically permeable bottom plate 1022 in the excitation structure 10 may be parallel to the display screen 11, or the magnetically permeable bottom plate 1022 in the excitation structure 10 and the display screen 11 are only arranged opposite but do not need to be strictly parallel.

The printed coil 101 includes multiple wire groups, and each wire group includes multiple wires. In some embodiments of the present application, multiple wire groups in the printed coil 101 are arranged in parallel, and the distance between adjacent guide groups may be the same. Multiple wires in each wire group can also be arranged in parallel, and the distance between adjacent wires can also be the same. For example, in the example shown in Fig. 9, the printed coil 101 includes 5 wire groups a, b, c, d, and e, and each wire group a-e includes 5 wires.

A plurality of permanent magnet pieces 1021 are attached to one side of the magnetically conductive bottom plate 421. In some embodiments of the present application, a plurality of permanent magnet pieces 1021 are arranged in parallel, and the distance between adjacent permanent magnet pieces 1021 may be the same. In FIG. 15, it is assumed that each permanent magnet piece 1021 is a rectangular outer body as an exemplary illustration, and the shape of the permanent magnet piece 1021 is not limited in this application.

In some embodiments of the present application, the connecting line between the magnetic poles of each permanent magnet piece 1021 may be perpendicular to the magnetic conductive bottom plate 1022. In addition, the long sides of the rectangular outer bodies of all permanent magnet pieces 1021 are arranged in parallel, and the magnetic poles of two adjacent permanent magnet pieces 1021 are arranged in opposite directions. Wherein, FIG. 16 is a schematic diagram of the magnetic pole direction of a plurality of permanent magnet pieces provided by this application, and each permanent magnet piece 1021 includes a north pole (N) and a south pole (S). Remember that the direction set by the magnetic bottom plate 1022 is the x direction, and after the x-y rectangular coordinate system is established, the magnetic lines of force between the N pole and the S pole of each permanent magnet piece 1021 are perpendicular to the x direction and parallel to the y direction. For any two adjacent permanent magnet pieces 1021 among the permanent magnet pieces 1021, when the N pole of one permanent magnet piece 1021 corresponds to the y positive direction, the N pole of the other permanent magnet piece corresponds to the y negative direction.

In some embodiments of the present application, in this embodiment, the magnetically permeable bottom plate 1022 in the excitation structure 10 is provided with one side of a plurality of permanent magnet sheets 1021, and when the printed coils 101 in the excitation structure 10 are arranged oppositely, the plurality of The permanent magnet sheet 1021 is arranged opposite to the multiple wire groups in the printed coil 101. At this time, the center line between two adjacent wire groups in the printed coil 101 is set opposite to one permanent magnet piece 1021, and at the same time, the center lines of two adjacent permanent magnet pieces 1021 among the plurality of permanent magnet pieces 1021 are also aligned with each other. A wire group is set relative to each other.

For example, in the example shown in FIG. 15, the center line between the wire group a and the wire group b is opposite to the permanent magnet piece B, the center line between the wire group b and the wire group c is opposite to the permanent magnet piece C, and the wire The center line between the group c and the wire group d is opposite to the permanent magnet piece D, the center line between the wire group d and the wire group e is opposite to the permanent magnet piece E, and the center lines between all the above wire groups are parallel and equally spaced . At the same time, the center line between permanent magnet piece A and permanent magnet piece B is opposite to wire group a, the center line between permanent magnet piece B and permanent magnet piece C is opposite to wire group b, permanent magnet piece C and permanent magnet piece The center line between D is opposite to the wire group c, the center line between the permanent magnet piece D and the permanent magnet piece E is opposite to the wire group d, and the center lines between all the permanent magnet pieces are parallel and equally spaced.

In some embodiments of the present application, the material of the plurality of permanent magnet pieces 1021 includes but is not limited to: samarium cobalt magnets, ferrite magnets, neodymium iron boron magnets, and alnico magnets. The material of the magnetically conductive bottom plate 1022 includes, but is not limited to, electrical pure iron, carbon steel, and iron sandwich composite panels, etc. The thickness of the magnetically conductive bottom plate 1022 can be in the range of 1-3 mm. The printed coil 101 includes: metal foil, transparent ITO, transparent nano-silver loop type conductive coil, etc., and its DC resistance may be in the range of 2-32Ω. In addition, the printed coil 101 has a relatively thin carrier substrate to be attached to the display screen through the carrier substrate. The material of the carrier substrate includes, but is not limited to, PET and polyimide.

In some embodiments of the present application, ventilation holes may be provided in the area of the magnetically conductive bottom plate 1022 where multiple permanent magnet sheets are not provided, so as to improve the heat dissipation capacity of the display screen 11 where the excitation structure 10 is provided.

In the following, with reference to FIG. 17 and FIG. 18, the principle that the excitation structure 10 of the electronic device converts electrical energy into mechanical energy through electromagnetic induction to make the display screen 11 emit sound will be described. Among them, FIG. 17 is a schematic diagram of the first state of the electronic device provided by this application; FIG. 18 is a schematic diagram of the second state of the electronic device provided by this application. Among them, in the examples shown in Figures 17 and 18, the N poles of the permanent magnet pieces A, C, and E point to the side of the display screen 11, and the S poles of the permanent magnet pieces A, C, and E point to the magnetic guide base 1022. Side; the N poles of the permanent magnet pieces B and D point to the side of the magnetic base plate 1022, and the S poles of the permanent magnet pieces B and D point to the side of the display screen 11.

First, as shown in FIG. 11, when the current direction in the wire groups a, c, and e in the printed coil 101 is the first direction shown in the figure, and the current in the wire groups b and d in the printed coil 101 is In the second direction shown in the figure, the state of the electronic device is recorded as the first state. Wherein, the first direction and the second direction are parallel to the wire group, and the first direction and the second direction are opposite. For the wire group a, the current direction is the first direction, and the direction of the magnetic induction intensity of the wire group a is the direction from the N pole of the permanent magnet piece A to the S pole of the permanent magnet piece B. At this time, the figure can be determined according to the left-hand rule The direction of the ampere force received by the wire group a in 17 is downward, that is, the direction of the ampere force is perpendicular to the direction of the magnetic guide base 1022.

Similarly, for wire groups b, c, and d, according to the current direction of each wire group and the direction of the received magnetic induction, it can be determined according to the left-hand rule that the direction of the ampere force received by the wire group bd is equal Downward, that is, perpendicularly refers to the direction of the magnetic guide base 1022. Therefore, when the electronic device is in the first state as shown in FIG. 17, all the wire groups of the printed coil 101 are subjected to the ampere force directed in the direction of the magnetic base plate 1022 under the action of electromagnetic induction. Closed on the display screen 11, the printed coil 101 will drive the display screen 11 to move in the direction of the magnetic base plate 1022 under the action of ampere force.

Next, as shown in FIG. 18, when the current direction in the wire groups a, c, and e in the printed coil 101 is the second direction shown in the figure, and the current in the wire groups b and d in the printed coil 101 is In the first direction shown in the figure, the state of the electronic device is recorded as the second state. Wherein, the first direction and the second direction are parallel to the wire group, and the first direction and the second direction are opposite. For the wire group a, the current direction is the second direction, and the direction of the magnetic induction intensity of the wire group a is the direction from the N pole of the permanent magnet piece A to the S pole of the permanent magnet piece B. At this time, the figure can be determined according to the left-hand rule The direction of the ampere force received by the wire group a in 18 is upward, that is, the direction of the ampere force is a direction perpendicular to the direction away from the magnetic conductive bottom plate 1022.

Similarly, for wire groups b, c, and d, according to the current direction of each wire group and the direction of the received magnetic induction, it can be determined according to the left-hand rule that the direction of the ampere force received by the wire group bd is equal Upward, that is, perpendicular to the direction away from the magnetic conductive bottom plate 1022. Therefore, when the electronic device is in the second state as shown in FIG. 18, all the wire groups of the printed coil 101 are subjected to ampere force in the direction away from the magnetic conductive base plate 1022 under the action of electromagnetic induction. Closed on the display screen 11, the printed coil 1022 will drive the display screen 11 to move away from the magnetic conductive bottom plate 1022 under the action of ampere force.

It can be seen in combination with Figure 17 and Figure 18 that when the electronic device reciprocates at a fixed frequency between the first state and the second state, the display screen 11 of the electronic device will reciprocate at the same frequency driven by the printed coil , So that bending waves are generated at the joint between the display screen 11 and the printed coil 101, and the bending waves can spread from the joint to the entire display screen 11, and finally realize the reciprocating motion of the display screen 11 through its surface. Bending wave vibration produces sound.

In other words, the vibration frequency of the display screen 11 is positively correlated with the switching frequency of the electronic device between the first state and the second state. When the electronic device switches between the first state and the second state, the greater the frequency The vibration frequency of the screen 11 reciprocating under the driving of the printed coil is also greater, and the sound emitted by the display screen 11 at this time is greater; and when the switching frequency of the electronic device between the first state and the second state is smaller, the display The vibration frequency of the screen 11 reciprocating under the driving of the printing coil is also smaller, and the sound emitted by the display screen 11 at this time is smaller.

At the same time, the vibration amplitude of the reciprocating motion of the display screen is positively correlated with the current flowing in the printing coil. When the current of the wire group in the printed coil is larger, the ampere force of the wire group under the action of the permanent magnet sheet is greater, and the vibration amplitude of the display screen under the driving of the printed coil is also greater; The smaller the current passed through the wire group, the smaller the ampere force that the wire group receives under the action of the permanent magnet sheet, and the smaller the vibration amplitude of the display screen 1 under the driving of the printed coil.

In summary, in the electronic equipment provided by the above-mentioned embodiments, the printed coils in the excitation structure are arranged to be attached to the display side surface of the display screen, and a plurality of permanent magnet sheets are attached to the magnetically conductive bottom plate, and the magnetically conductive bottom plate One side where the plurality of permanent magnet sheets are arranged is opposite to the printed coil. When the printed coil is energized, the printed coil can drive the display screen to vibrate and sound under the action of multiple permanent magnet sheets.

Since in the excitation structure provided by this embodiment, the permanent magnet sheet and the magnetic base plate other than the printed coil are not in direct contact with the display screen, and the thickness of the printed coil is relatively thin, the excitation structure can be used to excite hard displays. The screen vibration and sound can also be used to make the flexible display screen vibrate and sound, thereby enriching the application scenarios of electronic devices. In addition, the excitation structure provided by the electronic device in this embodiment can prevent the unevenness of the flexible display screen from being generated on the flexible display screen due to structural installation errors when the display screen is not excited. The way the printed coil drives the flexible display screen to vibrate can also avoid structural damage to the flexible display screen.

In some embodiments of the present application, in the examples shown in FIGS. 13-18, in order to illustrate the arrangement of multiple wire groups in the printed coil, only the parallel parts of the multiple wire groups in the printed coil are shown, and In the specific implementation of the printed coil, at least one wire can be diffracted multiple times in the same manner to obtain multiple wire groups in the printed coil.

Specifically, FIG. 19 is a schematic structural diagram of an embodiment of the printed coil provided by this application. As shown in FIG. 19, the starting point of a wire in the figure is S1, and the end point is S2, and the wire is repeatedly wound in the same way. Set 5 times, and pass the wire groups a, b, c, d, e, f, g, and h once in each winding. Finally, a printed coil including multiple wire groups is obtained, and each wire group in the printed coil includes the same number of wires, all the wire groups are parallel to each other, and the wires in all the wire groups are also parallel to each other.

When the target wire is connected to the first current, mark S1 as the positive pole and S2 as the negative pole. At this time, in the printed coil shown in Figure 19, the current direction of the wire groups a, c, e, and g is to the right, and the wire group The current direction of b, d, f and h is to the left. When the printed coil is used to realize the first state of the electronic device as shown in FIG. 17, it can drive the display screen to move in a direction close to the magnetically conductive bottom plate. When the target wire is connected to the second current, mark S1 as the negative pole and S2 as the positive pole. At this time, in the printed coil shown in Figure 19, the current direction of the wire groups a, c, e and g is to the left, and the wire group b The direction of current of, d, f and h is to the right. When the printed coil is applied to realize the second state of the electronic device as shown in FIG. 18, it can drive the display screen to move away from the magnetically conductive bottom plate. And the vibration frequency of the display screen in the electronic device is positively correlated with the switching frequency between the first current and the second current in the target wire.

In some embodiments of the present application, if the display screen is a flexible display screen, in order to prevent the flexible display screen from being damaged during the reciprocating vibration, an elastic suspension material can be provided for the display screen, which is specially used to wrap the display screen. On the frame of the electronic device, when the display screen can vibrate under the action of the printed coil, the vibration can be evenly decomposed under the action of the elastic suspension material, so as to prevent the vibration of the display screen from encountering the rigid frame. Damage the flexible display screen.

For example, FIG. 20 is a schematic structural diagram of an embodiment of an elastic suspension material for an electronic device provided by this application. As shown in FIG. 20, after the display screen 11 is wrapped by the elastic suspension material 21, it is shared with at least one of the excitation structures The frame 22 is fixed. The elastic suspension material 21 includes an elastic damping material. When the display screen 11 shown in FIG. 20 is driven by the printed coil 101 and vibrates up and down, its vibration can be absorbed by the elastic suspension material 21, thereby preventing the flexible display screen 11 from being directly connected with the rigid The frame 22 touches and causes damage.

For another example, FIG. 21 is a schematic structural diagram of another embodiment of an elastic suspension material for an electronic device provided by this application. The elastic suspension material is a spring 23. One end of the spring 23 is connected to the display screen 11, and the other end is connected to the frame of the electronic device. 24 connections. The display screen 11 and at least one excitation structure are jointly fixed by a frame 24. When the display screen 11 shown in FIG. 21 vibrates up and down under the driving of the printed coil 101, its vibration can be absorbed by the spring 23, thereby preventing the flexible display screen 11 from directly contacting the rigid frame 24 when it vibrates. Damage caused by contact.

It should be noted that the electronic devices described in the embodiments of the present application include but are not limited to the following devices: mobile phones, tablet computers, desktop computers, televisions, and other electrical appliances with display screens, such as washing machines, refrigerators, etc.

The above are only preferred embodiments of the application, and do not limit the application in any form. Any simple amendments, equivalent changes and modifications made to the above embodiments based on the technical essence of the application still belong to the present application. Within the scope of applying for technical solutions.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the application range.

Claims

An electronic device, characterized in that it comprises:

Display screen and at least one excitation structure;

The excitation structure includes: a first part and a second part; wherein the first part is attached to the non-display side surface of the display screen, the first part and the second part are arranged oppositely, and the There is a gap between the first part and the second part;

The second part is used to make the first part drive the display screen to vibrate and sound.
The electronic device according to claim 1, further comprising:

Optical film; the display is a liquid crystal screen, the first part is attached to the non-display side surface of the liquid crystal screen, and the second part is attached to the display side surface of the optical film .
The electronic device according to claim 1, wherein:

The display screen is an OLED screen;

The OLED screen includes: an array substrate and an encapsulation substrate that are attached and arranged;

At least one of the excitation structure is arranged on the side of the base substrate of the OLED screen.
The electronic device according to claim 1, wherein:

The display screen is a laser projection screen;

The laser projection screen includes: a backplane, a light-shielding layer, and a diaphragm that are attached and arranged;

The at least one excitation structure is arranged on the side of the back plate of the laser projection screen.
The electronic device according to claim 4, wherein:

The laser projection screen is a hard screen;

Alternatively, the laser projection screen is a soft screen, wherein the electronic device further includes an elastic suspension material for fixing the soft screen.
The electronic device according to any one of claims 1-5, wherein:

The first part includes: a printed coil; the printed coil includes a plurality of wire groups;

The second part includes: a magnetically permeable bottom plate and a plurality of permanent magnet pieces; a plurality of the permanent magnet pieces are attached to one side of the magnetically permeable bottom plate, and the magnetic lines of force between the magnetic poles of the permanent magnet pieces The magnetically conductive bottom plate is vertical, and the magnetic poles of two adjacent permanent magnet pieces are arranged in opposite directions;

The magnetically conductive bottom plate is provided with a permanent magnet piece on one side opposite to the printed coil, and the center line between two adjacent wire groups in the plurality of wire groups is connected to one of the permanent magnet pieces. The magnet pieces are arranged opposite to each other, and the center line between adjacent ones of the permanent magnet pieces is arranged opposite to one of the plural wire groups, and the permanent magnet pieces are not connected to the printing Coil contact

When the printed coil is energized and the direction of current between two adjacent wire groups is opposite, a plurality of the permanent magnet pieces are used to make the printed coil drive the display screen to vibrate and sound.
The electronic device according to claim 6, wherein:

The printed coil includes at least one wire;

Wherein, the wire is wound one or more times in the same manner to obtain the printed coil, and the wire passes through all the wire groups during winding.
The electronic device according to claim 7, wherein:

When the printed coil is connected to the first current, the plurality of permanent magnet sheets are used to make the printed coil drive the display screen to move in a direction close to the magnetic conductive bottom plate;

When the printed coil is connected to the second current, the plurality of permanent magnet sheets are used to make the printed coil drive the display screen to move away from the magnetic conductive bottom plate;

Wherein, the current direction of the wire group is different when the printed coil is connected to the first current and the second current.
The electronic device according to claim 8, wherein:

The vibration amplitude of the display screen is positively related to the current in the printed coil;

The vibration frequency of the display screen is positively related to the frequency of switching between the first current and the second current connected to the printed coil.
The electronic device according to claim 6, wherein:

In the at least one excitation structure, a plurality of permanent magnet pieces corresponding to each excitation structure are arranged on the same magnetically permeable base plate.