Micro vibrator and display device

Abstract

The micro-vibrator comprises a base, a circuit board, an elastic piece, an actuating assembly and an optical element, the circuit board is borne on the base, the elastic piece is fixed to the circuit board and electrically connected with the circuit board, the actuating assembly comprises a coil and a magnetic part, the magnetic part is fixed to the base, the coil and the elastic piece are fixedly connected and electrically conducted, and the coil and the magnetic part are coupled. And the optical element, the elastic sheet and the coil are connected, so that the coil drives the optical element to vibrate when the coil is electrified. The circuit board is electrically connected with the coil through the elastic sheet, and the elastic sheet can complete signal transmission or power supply. Compared with a mode of additionally arranging a wire, the elastic sheet with deformation capability is not easy to break in the offset process, the fatigue life of the elastic sheet is obviously longer than that of the additionally arranged wire, and the service life of the display device is effectively prolonged. Without additional wires, the configuration does not interfere with the vibration of the optical element. The embodiment of the utility model further provides a display device.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and particularly to a micro-vibrator and a display device. Background Art

[0002] A micro-vibrator is a small drivable mirror designed and manufactured based on a Micro-Electro-Mechanical System (MEMS). In an existing micro-vibrator, a mover needs to be powered on to vibrate. During this period, wires are required for the mover to transmit signals or supply power. However, the mover will drive the wires during vibration, resulting in slight bending, tugging, etc. of the wires. Subsequently, the wires may experience mechanical fatigue and breakage, reducing the service life of the micro-vibrator. Utility Model Content

[0003] Embodiments of the present application provide a micro-vibrator and a display device to at least partially improve the above technical problems.

[0004] Embodiments of the present application are implemented through the following technical solutions.

[0005] On the one hand, an embodiment of the present application provides a micro-vibrator, including a base, a circuit board, a spring piece, an actuation component, and an optical element. The circuit board is carried on the base, the spring piece is fixed to the circuit board and electrically connected to the circuit board. The actuation component includes a coil and a magnetic member. The magnetic member is fixed to the base, the coil is fixedly connected to the spring piece and electrically conductive, and the coil and the magnetic member are coupled to actuate when the coil is powered on. The optical element, the spring piece, and the coil are connected so that the coil drives the optical element to vibrate when powered on.

[0006] In one embodiment, the spring piece includes a first spring piece and a second spring piece. The circuit board has a first connection end and a second connection end. The coil includes a first connection terminal and a second connection terminal. The first spring piece is electrically connected to the first connection terminal and the first connection end, and the second spring piece is electrically connected to the second connection terminal and the second connection end.

[0007] In one embodiment, the first spring piece and the second spring piece include a first fixing portion, a second fixing portion, and an elastic arm connecting the first fixing portion and the second fixing portion. The first fixing portion is fixed to the base and electrically connected to the circuit board, and the coil is electrically connected to the second fixing portion.

[0008] In one embodiment, the elastic arms of the first spring piece and the second spring piece are arranged in parallel.

[0009] In one embodiment, the base is provided with a positioning member. One end of the first fixing portion is provided with a positioning hole, and the other end is provided with a first solder pad. The positioning hole corresponds to the positioning member, and the positioning member is embedded in the positioning hole. The first solder pad is electrically connected to the circuit board.

[0010] In one embodiment, the first fixing portion has a notch facing the second fixing portion, and one end of the elastic arm extends into the notch and is connected to the first fixing portion.

[0011] In one embodiment, the magnetic member includes a first magnetic member and a second magnetic member, and the first magnetic member and the second magnetic member are respectively disposed on opposite sides of the coil.

[0012] In one embodiment, the optical element is a mirror, and the elastic sheet is disposed between the mirror and the coil.

[0013] In one embodiment, the coil is disposed on the back surface of the mirror.

[0014] On the other hand, an embodiment of the present application provides a display device including the above-mentioned micro-vibrator.

[0015] In the micro-vibrator and the display device provided by the embodiments of the present application, the coil and the magnetic member are coupled. When the coil is energized, it is actuated to drive the optical element and the elastic sheet to move. The elastic sheet deforms to generate an elastic force, and the elastic force can drive the optical element and the elastic sheet to return to the initial state. Affected by the magnitude and frequency of the current, the coil can be offset in different directions to cause the micro-vibrator to vibrate. The circuit board is electrically connected to the coil through the elastic sheet, and the elastic sheet can complete signal transmission or power supply. Compared with the method of additionally providing wires, the elastic sheet with deformation ability is not easily broken during the offset process, and its fatigue life is significantly higher than that of the additionally provided wires, effectively improving the service life of the display device. Since no additional wires are required, this configuration will not interfere with the vibration of the optical element, and can also reduce the installation difficulty and improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a display device proposed by an embodiment of the present application;

[0018] Figure 2 It is a schematic structural diagram of a micro-vibrator proposed by an embodiment of the present application;

[0019] Figure 3 It is an exploded structural diagram of a micro-vibrator proposed by an embodiment of the present application;

[0020] Figure 4 It is a schematic structural diagram of an actuating component and an elastic sheet proposed by an embodiment of the present application;

[0021] Figure 5 This is a schematic structural diagram of an actuating component proposed in an embodiment of the present application;

[0022] Figure 6 This is a relationship diagram between the signal amplitude and the control duration of a control signal of a coil proposed in an embodiment of the present application. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0025] This embodiment provides a display device 1. Please refer to Figure 1 , the display device 1 may include a micro-vibrator 100, and the micro-vibrator 100 may control the translational and torsional reciprocating movements of a micro-optical element. In addition to the micro-vibrator, the display device 1 may include a light source device (not shown in the figure), the light source device emits a laser beam, and the translational and torsional optical elements may reflect the laser beam to different angles, thereby realizing laser scanning.

[0026] In this embodiment, the micro-vibrator 100 is a small drivable mirror designed and manufactured based on micro-electro-mechanical systems. This setting can be applied to fields such as lidar, 3D cameras, barcode scanning, laser printers, medical imaging, etc.

[0027] In addition, the micro-vibrator 100 can also be applied to fields such as high-definition TVs, laser micro-projection (using mobile phones, tablets, and portable projectors as carriers), digital cinemas, automotive head-up displays (HUDs), laser keyboards, augmented reality (AR), etc.

[0028] Specifically, please refer to Figure 2 , the micro-vibrator 100 may include a base 110, a circuit board 120, a shrapnel 130, an actuating component 140, and an optical element 150. The circuit board 120 is carried on the base 110, the optical element 150 is connected to the shrapnel 130, the shrapnel 130 is fixed to the circuit board 120, and the shrapnel 130 is electrically connected between the circuit board 120 and the actuating component 140.

[0029] The shape of the base 110 can be a frustum of a cone, a cube, a sheet, etc. The shape, size parameters, etc. of the base 110 can be selected according to the optical element 150 and its moving range. The base 110 can be selected as an insulator such as a plastic base or a ceramic base. In addition, the base 110 can also be selected as a metal base such as a stainless steel base or a copper base. The metal base can quickly dissipate heat to reduce the working temperature of the optical element 150. Preferably, an insulating arrangement can be provided between the base 110 and the circuit board 120 to prevent the current of the circuit board 120 from being transmitted to the base 110, thus avoiding short - circuit situations.

[0030] In one embodiment, please also refer to Figure 2 and Figure 3 , when the optical element 150 of the micro - vibrator 100 is working, vibration deflection, etc. will occur. The base 110 can be configured with a relief groove 111 for making way for the vibration of the optical element 150. The relief groove 111 is arranged opposite to the optical element 150. The shape and size of the relief groove 111 can be correspondingly set with the optical element 150. In addition, the elastic piece 130 can be carried on the groove wall of the relief groove 111. The elastic piece 130 can provide a certain supporting force for the optical element 150. When the optical element 150 vibrates, the relief groove 111 makes way for the optical element 150, and the optical element 150 can vibrate and deflect within the relief groove 111. The relief groove 111 provides a certain vibration space for the optical element 150, and the groove wall of the relief groove 111 can carry the elastic piece 130 to realize the support of the elastic piece 130 and drive the optical element 150 to rotate.

[0031] Preferably, the depth of the relief groove 111 can be adapted to the vibration range of the optical element 150 to prevent the optical element 150 from abutting against the bottom of the relief groove 111 during vibration and to prevent situations such as impact from occurring.

[0032] In this embodiment, please refer back to Figure 3, the circuit board 120 can be a rigid printed circuit board (Rigid PCB), a flexible printed circuit board (Flexible PCB, FPC), a rigid-flex printed circuit board (Rigid-Flex PCB), etc. The rigid circuit board is made of a rigid substrate that is not easily bent and has a certain strength, such as an aluminum substrate. The flexible circuit board is a circuit board 120 made of a flexible material, such as polyimide, polyester film, etc., and has a certain flexibility, which is suitable for narrow or irregular scenarios. The rigid-flex circuit board has both the stability and reliability of the rigid part and the bendability of the flexible part. The type of the circuit board 120 can be selected according to the specific implementation scenario, etc. For example, the circuit board 120 can be selected as a flexible circuit board, which is suitable for being arranged in the narrow space of the base 110, and the surface of the flexible circuit board 120 is configured with an insulating material to prevent electrical connection between the circuit board 120 and the base 110 and reduce the safety hazards of the circuit board 120.

[0033] In one implementation, the circuit board 120 can be used to conduct current or transmit control signals, etc., to control the energized state of the actuating component 140. The circuit board 120 can be provided with a control chip, and the control chip can be applied to leakage protection, short-circuit protection, executing a preset program, wireless communication, etc., which will not be elaborated in this embodiment. The control chip can execute a preset program, and the execution program can be set with an energization duration, a maximum current frequency, etc. The control chip can prompt the circuit board 120 to execute its built-in program to independently complete the control of the vibration of the optical element 150.

[0034] In another implementation, the circuit board 120 can be externally connected with a power source or other signal sources. Furthermore, the circuit board 120 can receive external current or control signals and modulate them for subsequent use by the coil 141.

[0035] In this embodiment, please refer to Figure 3 and Figure 4 , the actuating component 140 can include a coil 141 and a magnetic member 142. The coil 141 and the magnetic member 142 are correspondingly arranged and coupled to each other.

[0036] The coil 141 is a circular wire winding, and the number of turns of the coil 141 can be multiple turns. The size and number of turns of the coil 141 are not limited and are designed and selected according to the specific actuation effect and requirements. Moreover, the shape of the coil 141 can be rectangular, etc. The rectangular coil is formed by winding a wire along a rectangle. As Figure 3 shown, compared with a circular coil, the rectangular coil can generate a more uniform magnetic field distribution.

[0037] In a specific embodiment, a rectangular-shaped coil 141 can be arranged along the outer contour of the optical element 150 and is actuated when powered on. Under the action of the mutually coupled magnetic fields, the coil 141 can apply magnetic force to various parts of the optical element 140, thereby ensuring the tilting effect of the optical element 140.

[0038] The magnetic member 142 can be a permanent magnet, an electromagnet, etc. A permanent magnet is a magnet that can permanently maintain a certain magnetism after magnetization, such as samarium-cobalt magnets, neodymium-iron-boron magnets, etc., which are suitable for special scenarios where electrification is not suitable. An electromagnet has controllable magnetism because its magnetism is generated by passing an electric current, which is beneficial for implementation in more precise application environments. The magnetic member 142 can also be of more types of magnets, which will not be elaborated in this embodiment. Moreover, the shape of the magnetic member 142 can be a cube, a sheet, a tile-shaped structure, and other irregular shapes, etc., which are not limited in this embodiment.

[0039] In this embodiment, please refer to Figure 3 and Figure 5 , the magnetic member 142 can be fixed to the base 110. More specifically, the magnetic member 142 can be bonded to the wall of the relief groove 111 of the base 110, or the magnetic member 142 can also be connected to the base 110 by means of fastener connection, etc. The coil 141 is fixedly connected to and electrically conductive with the elastic piece 130 to be actuated when the coil 141 is powered on. Based on the magnetic effect of the current, the coil 141 can generate a magnetic field after being powered on, and the generation and disappearance of this magnetic field are controlled by the power-on and power-off of the coil 141. The coil 141 and the magnetic member 142 are coupled, and the magnetic field of the magnetic member 142 can interact with the magnetic field of the coil 141. Under the interaction of the magnetic fields, the elastic piece 130 connected to the coil 141 is actuated, and the optical element 150 will also be driven. The direction of the magnetic field of the coil 141 also changes with the direction of the current, and the direction of the current changes at all times, prompting the coil 141 to continuously change the tilting angle and direction of the optical element 150. The optical element 150 can rotate as the elastic piece 130 tilts, so that the optical element 150 can receive light at more angles.

[0040] In one embodiment, the magnetic member 142 can include a first magnetic member 1421 and a second magnetic member 1422, and the first magnetic member 1421 and the second magnetic member 1422 are respectively arranged on opposite sides of the coil 141. The first magnetic member 1421 and the second magnetic member 1422 interact with each other. Compared with a single magnetic member 142, the magnetic field distribution formed by the interaction of the first magnetic member 1421 and the second magnetic member 1422 is more uniform. When the purpose is to adjust the rotation angle of the elastic piece 130 and the optical element 150, a more uniform magnetic field distribution can reduce the influence of magnetic field factors and make it more convenient to adjust the rotation angle of the elastic piece 130 and the optical element 150 by current.

[0041] Preferably, the relative positions, shapes, sizes, and magnetization states between the first magnetic member 1421 and the second magnetic member 1422 can be configured to be the same, which is conducive to realizing magnetic field coupling between them, thereby generating a more uniform magnetic field within a certain area.

[0042] In some other cases, in addition to the first magnetic member 1421 and the second magnetic member 1422, the actuating assembly 140 may further include more magnetic members 142 to achieve a more complex actuating effect. Moreover, the plurality of magnetic members 142 can be set as electromagnets to control the generation or disappearance of the magnetic fields of the magnetic members 142 and avoid mutual influence between the plurality of magnetic members 142.

[0043] It can be understood that when current passes through the coil 141, according to Ampere's circuital law, the current will form a magnetic field around the wire, and the intensity of this magnetic field is directly related to the magnitude of the current passing through the coil 141. In other words, the greater the current of the coil 141, the stronger the magnetic field of the coil 141, the greater the magnetic field interaction, and the greater the tilting angles of the elastic piece 130 and the optical element 150. The smaller the current of the coil 141, the weaker the magnetic field of the coil 141, the smaller the magnetic field interaction, and the smaller the tilting angles of the elastic piece 130 and the optical element 150. The frequency of the control signal of the coil 141 can be between 100 Hz and 2000 Hz, such as 100 Hz, 500 Hz, 1000 Hz, 1500 Hz, 2000 Hz, etc. Furthermore, the elastic piece 130 and the optical element 150 reciprocally flip, and the flipping frequency corresponds to the control signal.

[0044] In a more specific embodiment, for example, when the natural frequency of the scanning mirror is 200 Hz, the driving signal adopts a Figure 6 200 Hz sine wave signal as shown. Figure 6 The abscissa of [figure] is the control duration of the driving signal, with the unit of second (s), and the ordinate is the signal amplitude of the driving signal. Further, please refer to Figure 5 , the energizing current of the coil 141 can be sinusoidal alternating current. Within a sine wave cycle, starting from when the current is 0, the rotation angle of the elastic piece 130 and the optical element 150 is 0. When the current conducts the coil 141 in the positive direction, the current magnitude increases to the maximum value after a quarter cycle, and the magnetic field of the coil 141 continuously strengthens during this period. The elastic piece 130 and the optical element 150 rotate to the first angle along the first direction (such as Figure 5 L1 shown in [figure]). The current then decreases to 0 after another quarter cycle, and the magnetic field magnitude gradually decreases to 0. The elastic piece 130 and the optical element 150 gradually return to their original states, that is, the rotation angle is 0. When the current conducts the coil 141 in the negative direction, the current magnitude increases to the maximum value after a quarter cycle, and the magnetic field of the coil 141 continuously strengthens during this period. The elastic piece 130 and the optical element 150 rotate along the second direction (such asFigure 5 The L2 shown in the figure) is rotated to the second angle. The current is reduced to 0 after another quarter cycle, and the elastic piece 130 and the optical element 150 gradually return to their original states, that is, the rotation angle is 0. Among them, the positive and negative directions of the current are only used to distinguish the current direction, and the embodiment does not limit the sequence of the current power-on directions.

[0045] In another embodiment, the control signal transmitted by the circuit board 120 to the coil 141 can also be a pulse square wave signal.

[0046] It can be seen that within an alternating current cycle, the elastic piece 130 and the optical element 150 can rotate in two directions to complete the vibration of the optical element 150. And, the maximum rotation range of the elastic piece 130 and the optical element 150 is the sum of the first angle and the second angle.

[0047] Among them, the alternating current can be obtained by operating the mains power through voltage transformation, frequency conversion, etc., and can also be obtained by converting direct current. Thus, in some embodiments, the circuit board 120 can be provided with a voltage transformation module, a frequency conversion module, an inverter module, etc. to adjust the current parameters of the coil 141.

[0048] In this embodiment, please refer to Figure 3 , the elastic piece 130 can be generally sheet-shaped. The sheet-shaped elastic piece 130 is more likely to deform and has a larger contact area with the optical element 150. The elastic piece 130 can be configured as a metal elastic piece, such as a copper elastic piece, a stainless steel elastic piece, etc. The metal elastic piece 130 has characteristics such as good electrical conductivity and high strength.

[0049] The elastic piece 130 is fixed to the circuit board 120. The elastic piece 130 can be connected to the circuit board 120 by means of bonding, welding, fastener connection, etc. The elastic piece 130 is electrically connected to the coil 141 and the circuit board 120, and the elastic piece 130 has a certain elasticity and strength. The elastic piece 130 can still ensure the connection stability between the coil 141 and the circuit board 120 after being twisted multiple times, improving the service life of the micro-vibrator 100. Compared with the method of additionally arranging wires, even when driven by the coil 141, the deformable elastic piece 130 will not easily break during the offset process, and its fatigue life is significantly higher than the additionally arranged wires, effectively improving the service life of the display device 1. Since there is no need to additionally arrange wires, this configuration will not interfere with the optical element 150, can also reduce the number of components of the micro-vibrator 100, reduce the installation difficulty, and improve the production efficiency.

[0050] Exemplarily, the circuit board 120 is configured with output contacts, and the circuit board 120 outputs a control signal or a power-on current through the output contacts. The elastic piece 130 can be welded to the output contacts, and the elastic piece 130 can receive the control signal or the power-on current and transmit it to the coil 141, improving the electrical connection effect between the two.

[0051] In this embodiment, please refer to both Figure 3 and Figure 4 . The elastic piece 130 may include a first elastic piece 131 and a second elastic piece 132. The shapes, sizes, etc. of the first elastic piece 131 and the second elastic piece 132 may be configured to be the same. The first elastic piece 131 and the second elastic piece 132 may be disposed on opposite sides of the optical element 150. Further, the first elastic piece 131 and the second elastic piece 132 are symmetric to each other. The arrangement of the first elastic piece 131 and the second elastic piece 132 on the peripheral side of the optical element 150 improves the bearing effect of the optical element 150 and is beneficial to improving the stability of the optical element 150 during the deflection process.

[0052] In one implementation manner, please refer to Figure 3 . The circuit board 120 has a first connection end 121 and a second connection end 122, and the phases or polarities of the first connection end 121 and the second connection end 122 are different. The coil 141 includes a first connection terminal (not shown in the figure) and a second connection terminal (not shown in the figure). The first elastic piece 131 is electrically connected to the first connection terminal and the first connection end 121, and the second elastic piece 132 is electrically connected to the second connection terminal and the second connection end 122. Specifically, one end of the second connection end 122 is connected to the second elastic piece 132, one end of the first connection end 121 is connected to the first elastic piece 131, and a loop may be formed between the first connection end 121 and the second connection end 122. One end of the first elastic piece 131 away from the first connection end 121 is connected to the first connection terminal. One end of the second elastic piece 132 away from the second connection end 122 is connected to the second connection terminal. In addition to improving the stability of the deflection of the optical element 150, the first elastic piece 131 and the second elastic piece 132 can also be used for connection ends with different phases to improve the signal transmission effect of the circuit board 120.

[0053] More specifically, both the first elastic piece 131 and the second elastic piece 132 include a first fixing part 1331, a second fixing part 1332, and an elastic arm 1333. The following content will take the first elastic piece 131 as an example for introduction. The elastic arm 1333 is connected between the first fixing part 1331 and the second fixing part 1332. The elastic arm 1333 has good elasticity and high strength. The elastic arm 1333 is rod-shaped, with one end connected to the first fixing part 1331 and the other end connected to the second fixing part 1332. The first fixing part 1331 is fixed to the base 110. The first fixing part 1331 can be connected to the base 110 by means such as welding and bonding. The first fixing part 1331 is electrically connected to the circuit board 120. The coil 141 is electrically connected to the second fixing part 1332. Among them, the second fixing part 1332 can be directly welded to the coil 141. The first fixing part 1331 and the second fixing part 1332 are used to connect the circuit board 120 and the coil 141. The elastic arm 1333 is used to conduct and connect between the first fixing part 1331 and the second fixing part 1332. In addition, when the coil 141 is energized and the second fixing part 1332 rotates, the elastic arm 1333 can also undergo elastic deformation, prompting the second fixing part 1332 and the optical element 150 to be able to rotate relative to the base 110.

[0054] It can be understood that when the elastic arm 1333 undergoes self-offset and stretching, etc., the elastic force and its own deformation change linearly. The two ends of the elastic arm 1333 are connected to the first fixing part 1331 and the second fixing part 1332. The first fixing part 1331 is fixed relative to the base 110. The deformation amount of the elastic arm 1333 is related to the offset amplitude of the optical element 150 and the second fixing part 1332. Ignoring the influence of gravity, the larger the offset amplitude of the optical element 150 and the second fixing part 1332, the larger the deformation amount of the elastic arm 1333, and the greater the elastic force provided to the optical element 150 and the second fixing part 1332. The smaller the offset amplitude of the optical element 150 and the second fixing part 1332, the smaller the deformation amount of the elastic arm 1333, and the smaller the elastic force provided to the optical element 150 and the second fixing part 1332. Until the optical element 150 and the second fixing part 1332 return to their original positions, the deformation amount and elastic force of the elastic arm 1333 disappear together.

[0055] Preferably, the elastic arms 1333 of the first elastic piece 131 and the elastic arms 1333 of the second elastic piece 132 are arranged in parallel. For the convenience of distinction and description, the elastic arm 1333 of the first elastic piece 131 is referred to as the first elastic arm 1333, and the elastic arm 1333 of the second elastic piece 132 is referred to as the second elastic arm 1333. The elastic force directions generated by the deformation of the first elastic arm 1333 and the second elastic arm 1333 are also relatively parallel, avoiding the instability of the elastic forces generated by the first elastic arm 1333 and the second elastic arm 1333, and the elastic forces of the two cannot balance each other. Furthermore, this configuration can improve the stability between the first elastic piece 131 and the second elastic piece 132.

[0056] In one embodiment, the base 110 is provided with a positioning member 112. One end of the first fixing portion 1331 is provided with a positioning hole 1334, and the other end is provided with a first solder pad 1335. The positioning hole 1334 is correspondingly arranged with the positioning member 112, and the positioning member 112 is embedded in the positioning hole 1334. The first solder pad 1335 is electrically connected to the first connection end 121 of the circuit board 120. More specifically, the base 110 can be provided with positioning posts for fixing the elastic piece 130, and there is an interference fit between the positioning posts and the positioning holes 1334. It can improve the connection tightness so that the elastic piece 130 can be fixed on the base 110. The setting of the first solder pad 1335 facilitates the soldering between the first fixing portion 1331 and the circuit board 120, which is beneficial to improving the installation efficiency.

[0057] Preferably, the end of the positioning post can be chamfered, and the chamfering is beneficial to sleeving the positioning hole 1334 into the positioning hole 1334, further improving the installation efficiency.

[0058] In another embodiment, please refer to Figure 4 , the first fixing portion 1331 has a notch 1336 facing the second fixing portion 1332. The shape of the notch 1336 can be rectangular, semi-circular, etc., and the present application does not limit it. One end of the elastic arm 1333 extends into the notch 1336 and is connected to the first fixing portion 1331. The notch 1336 can increase the distance between the first fixing portion 1331 and the second fixing portion 1332, prompting the length of the elastic arm 1333 to increase, so that the deformation amount of the elastic arm 1333 is larger and the rotation range of the optical element 150 is larger.

[0059] In this embodiment, please continue to refer to Figure 4, the second fixing part 1332 is provided with a second pad 1337, and the second pad 1337 is arranged at one end of the second fixing part 1332 far away from the first fixing part 1331. The second pad 1337 can be electrically connected to the first connection terminal of the coil 141. More specifically, the shape of the coil 141 can be rectangular, and the coil 141 can enclose an installation space 1413. One end of the second fixing part 1332 far away from the first fixing part 1331 extends into the installation space 1413 and is provided with the second pad 1337. The second pad 1337 is not blocked by the coil 141, which is convenient for installers to perform connection operations such as welding, avoids self-interference of the coil 141 with the connection operation, and effectively improves the installation efficiency.

[0060] The second pad 1337 can be directly connected to the first connection terminal of the coil 141 by welding. Or, due to factors such as the too short length or poor position of the connection terminal of the coil 141, it is not suitable for direct welding. A wire (not shown in the figure) is arranged between the second pad 1337 and the first connection terminal. One end of the wire is connected to the first connection terminal, and the other end is welded to the second pad 1337.

[0061] It can be understood that the content about the first pad 1335 and the second pad 1337 is introduced by taking the first elastic piece 131 as an example. The first pad 1335 and the second pad 1337 of the second elastic piece 132 can also be electrically connected to the second connection terminal 122 and the second connection terminal through the above embodiments.

[0062] In this embodiment, please refer to Figure 3 and Figure 5 , the optical element 150 can be a mirror. Specifically, the optical element 150 can be a metal film mirror, a dielectric film mirror, a ceramic mirror, etc. The metal film mirror can be an aluminum film mirror or a silver film mirror, etc. The metal film mirror has characteristics such as high reflectivity, wide reflection band, and insensitivity to the incident angle. The dielectric film mirror is plated with multiple dielectric films on the surface of the optical element 150. The dielectric film mirror has characteristics such as high reflectivity, wide reflection band, high mechanical hardness, and good stability. The ceramic mirror has characteristics such as low thermal expansion coefficient, high hardness, and good stability. Specifically, it can be selected and designed according to the working temperature, implementation environment, etc. of the optical element 150, and this embodiment does not make specific limitations.

[0063] In one embodiment, the aperture of the optical element 150 can be 2 mm to 20 mm, such as 2 mm, 6 mm, 10 mm, 12 mm, 16 mm, 20 mm, etc. In other words, the optical element 150 is circular in shape, that is, the diameter of the optical element 150 is 2 mm to 20 mm. Alternatively, the optical element 150 is rectangular in shape, that is, the length of the optical element 150 is 2 mm to 20 mm. The aperture of the optical element 150 should not be set too large or too small. If it is set too large, it is not suitable for flipping vibration. If it is set too small, it is not suitable for reflection. A suitable optical element 150 can balance the flipping range and reflection effect, improving the use effect of the micro-vibrator 100.

[0064] In addition, the shape of the optical element 150 can be a plane mirror, a spherical mirror or an aspherical mirror, etc. The plane mirror has a simple structure, is easy to install, and has perfect imaging. The spherical mirror is easy to process and align, and has a wide application. Specifically, it can also be a concave mirror or a convex mirror to produce the effect of converging or diverging light. The aspherical mirror can effectively correct spherical aberration, improve imaging quality, and has a larger aperture, being thin, light and beautiful. The shape of the optical element 150 will be selected and designed according to the implementation environment, implementation requirements, etc. This implementation does not make specific restrictions.

[0065] As Figure 3 shown, the optical element 150 can have a light-receiving surface 151 and a backlight surface 152. The light-receiving surface 151 is the surface of the optical element 150 for receiving external light, and the backlight surface 152 is the surface opposite to the light-receiving surface 151. In one embodiment, the optical element 150 is disposed on the elastic sheet 130. Further, the optical element 150, the elastic sheet 130, and the coil 141 are connected. Specifically, the optical element 150 is a mirror, the elastic sheet 130 is disposed between the mirror and the coil 141, and both the elastic sheet 130 and the coil 141 fixedly connected to the elastic sheet 130 can be disposed on the back of the mirror, that is, on the backlight surface 152. When the coil 141 is energized, it actuates, the elastic sheet 130 is driven by the coil 141, and the optical element 150 connected to the elastic sheet 130 can rotate as the elastic sheet 130 tilts, so that the coil 141 can drive the optical element 150 to vibrate when actuating. The light-receiving surface 151 of the optical element 150 for receiving light changes, so that the optical element 150 can receive light at more angles or reflect light to more different angles. The configuration disposed on the backlight surface 152 can avoid the optical element 150 and the coil 141 from blocking the light-receiving surface 151 and reduce the interference of the two on the light on the premise of ensuring the normal vibration of the optical element 150.

[0066] More specifically, please refer to Figure 5, the optical element 150 is connected to the surface of the elastic piece 130 away from the coil 141, that is, the elastic piece 130 can be arranged between the optical element 150 and the coil 141, and the optical element 150 and the coil 141 are connected to opposite sides of the second fixing portion 1332. The optical element 150 can be connected to the elastic piece 130 by connection means such as bonding, fastener connection, welding, etc. The coil 141 can be arranged closer to the magnetic member 142, and the actuation effect between the two is more obvious.

[0067] Preferably, the shape of the elastic piece 130 can be adapted to the optical element 150. Exemplarily, the elastic piece 130 can be configured as an arc to adapt to the spherical surface of the optical element 150. This configuration increases the contact area between the elastic piece 130 and the optical element 150, so that the optical element 150 can be stably mounted in the elastic piece 130, thereby avoiding situations such as the separation of the elastic piece 130 from the optical element 150.

[0068] In the micro-vibrator 100 and the display device 1 provided by the embodiments of the present application, the coil 141 and the magnetic member 142 are coupled. When the coil 141 is energized, it is actuated to drive the optical element 150 and the elastic piece 130 to move. The elastic piece 130 deforms to generate an elastic force, and the elastic force can drive the optical element 150 and the elastic piece 130 to return to the initial state. Affected by the magnitude and frequency of the current, the coil 141 can be offset in different directions to cause the micro-vibrator 100 to vibrate. The circuit board 120 is electrically connected to the coil 141 through the elastic piece 130, and the elastic piece 130 can complete signal transmission or power supply. Compared with the method of additionally arranging wires, the elastic piece 130 with deformation ability is not easily broken during the offset process, and its fatigue life is significantly higher than that of the additionally arranged wires, effectively improving the service life of the display device 1. Since there is no need to additionally arrange wires, this configuration will not interfere with the vibration of the optical element 150, and can also reduce the number of components of the micro-vibrator 100, reduce the installation difficulty, and improve the production efficiency.

[0069] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as specific references or special structures. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in connection with this embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any at least one embodiment or example. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in the present invention and the features of different embodiments or examples.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A micro vibrator, characterized in that: include: Base; A circuit board, the circuit board is carried by the base; A spring sheet, the spring sheet is fixed to the circuit board and is electrically connected to the circuit board; an actuating assembly, the actuating assembly comprising a coil and a magnetic member, the magnetic member being fixed to the base, the coil being fixedly connected to the spring and being electrically conductive, the coil and the magnetic member being coupled so as to be actuated when the coil is energized; and The optical element, the spring and the coil are connected so that the coil drives the optical element to vibrate when powered on.

2. The micro vibrator according to claim 1, characterized in that: The spring sheet includes a first spring sheet and a second spring sheet, the circuit board has a first connection end and a second connection end, the coil includes a first wiring terminal and a second wiring terminal, the first spring sheet is electrically connected to the first wiring terminal and the first connection end, and the second spring sheet is electrically connected to the second wiring terminal and the second connection end.

3. The micro-vibrator according to claim 2, characterized in that: The first spring sheet and the second spring sheet include a first fixing portion, a second fixing portion and an elastic arm connected between the first fixing portion and the second fixing portion. The first fixing portion is fixed to the base and electrically connected to the circuit board. The coil is electrically connected to the second fixing portion.

4. The micro-vibrator according to claim 3, characterized in that: The elastic arm of the first elastic sheet and the elastic arm of the second elastic sheet are arranged in parallel.

5. The micro-vibrator according to claim 3, characterized in that: The base is provided with a positioning piece, a positioning hole is opened at one end of the first fixing part, and a first soldering pad is provided at the other end, the positioning hole is arranged corresponding to the positioning piece, the positioning piece is embedded in the positioning hole, and the first soldering pad is electrically connected to the circuit board.

6. The micro-vibrator according to claim 5, characterized in that: The first fixing portion has a notch facing the second fixing portion, and one end of the elastic arm extends into the notch and is connected to the first fixing portion.

7. The micro-vibrator according to any one of claims 1 to 6, characterized in that: The magnetic member includes a first magnetic member and a second magnetic member, and the first magnetic member and the second magnetic member are disposed on two opposite sides of the coil.

8. The micro-vibrator according to claim 1, characterized in that: The optical element is a reflector, and the spring is arranged between the reflector and the coil.

9. The micro-vibrator according to claim 8, characterized in that: The coil is arranged on the back side of the reflector.

10. A display device, characterized in that: include: A micro-vibrator as claimed in any one of claims 1 to 9.

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