Display devices

Abstract

The present application provides a display device comprising a display panel including a display area and a non-display area; a magnetostrictive actuator disposed at a position corresponding to the non-display area of ​​the display panel; the magnetostrictive actuator comprising a telescopic member, a first movable portion, and a second movable portion; in a static state, the first movable portion is disposed perpendicular to the telescopic member; and the second movable portion is disposed at an angle to the telescopic member. The actuator provided in the present application has a small dimension along the coil axis, conforming to the trend toward flatter display devices.

Description

Technical Field

[0001] The present application relates to the technical field of loudspeakers, and in particular to a display device and an actuator. Background Art

[0002] Screen sound technology, when applied to display devices, offers superior sound quality compared to those equipped with traditional speakers. Related technologies employing screen sound technology include a display and an actuator, which vibrates the display to produce sound. However, the actuator's substantial thickness in the thickness direction of the display hinders the development of thinner displays. Summary of the Invention

[0003] In view of the above problems, some embodiments of the present application provide a display device, wherein the vibration output direction is along the radial direction of the telescopic member, and the radial size of the exciter along the coil is relatively small, which conforms to the flattening development trend of display devices.

[0004] Some embodiments of the present application provide a display device, including a display panel, the display panel including a display area and a non-display area; a magnetostrictive actuator, arranged at a position corresponding to the non-display area of ​​the display panel; wherein the magnetostrictive actuator includes a telescopic member, a first movable portion, and a second movable portion; in a static state, the first movable portion is arranged perpendicular to the telescopic member, and the second movable portion is arranged at an angle to the telescopic member.

[0005] In some embodiments, the device further includes a reinforcing plate located between the display panel and the magnetostrictive actuator.

[0006] In some embodiments, the present invention further comprises: a frame surrounding the display panel, wherein the frame is provided with a frame reinforcement portion; the magnetostrictive actuator is placed on the frame and arranged side by side with the frame reinforcement portion.

[0007] In some embodiments, the magnetostrictive actuator further includes: a coil, the first movable portion is located at an end of the coil along its own axial direction, and the second movable portion is located at a side of the coil along its own radial direction.

[0008] In some embodiments, the first end of the first movable part is fixedly connected to the body of the magnetostrictive actuator, the second end of the first movable part is connected to the second movable part, the first movable part can flip back and forth relative to the coil with its first end as a fulcrum, and the telescopic part is located between the first end and the second end of the first movable part.

[0009] In some embodiments, there is a first distance between the first end of the first movable part and the telescopic member along the extension direction of the first movable part, and there is a second distance between the second end of the first movable part and the telescopic member along the extension direction of the first movable part, and the first distance is smaller than the second distance.

[0010] In some embodiments, a first reinforcement portion is provided at the first end of the first movable portion, and a cross-sectional dimension of the first reinforcement portion is smaller than a cross-sectional dimension at other positions of the first movable portion.

[0011] In some embodiments, the exciter also includes a connecting portion, which is located on the side of the coil along its own radial direction, one end of the connecting portion is connected to the first movable portion, and the other end of the connecting portion is connected to the second movable portion, and there is an angle between the length extension direction of the connecting portion and the axial direction of the coil.

[0012] In some embodiments, the coil is tubular and the telescopic member is cylindrical.

[0013] In some embodiments, a bending portion is further included, wherein both ends of the bending portion are respectively connected to the first movable portion and the second movable portion, and the first movable portion and the second movable portion can move relative to each other under the elastic force of the bending portion.

[0014] Some embodiments of the present application provide an exciter, which includes a coil; a telescopic member, which can undergo telescopic deformation along the axial direction of the coil; a second vibrating member, which includes a first movable part and a second movable part connected to each other, the first movable part is used to be connected to a display device, and the first movable part is located at the end of the coil along its own axial direction; the second movable part is used to be connected to the display device, and the second movable part is located on the side of the coil along its own radial direction; when the telescopic member is extended and retracted, the first movable part can move back and forth relative to the end of the coil under the action of the elastic force of the telescopic member or the second vibrating member, and the second movable part can move back and forth under the action of the elastic force of the first movable part or the second vibrating member, and drive the display device to vibrate and make sound; wherein, the reciprocating movement direction of the second movable part is set at an angle to the axial direction of the coil.

[0015] Beneficial effect: According to some embodiments of the present application, the display device provided by adopts a magnetostrictive actuator, which includes a telescopic part, a first movable part, and a second movable part; in a static state, the first movable part is arranged perpendicular to the telescopic part, and the second movable part is arranged at an angle to the telescopic part, thereby achieving thinning of the display device in the thickness direction.

[0016] In addition to the technical problems solved by some embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the display devices and exciters provided by some embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in some embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A structural diagram of a display device provided in some embodiments of the present application;

[0019] Figure 2 Schematic diagram of a display device with screen sound provided in some embodiments of the present application;

[0020] Figure 3 Schematic diagram of a display device with screen sound provided in some embodiments of the present application

[0021] Figure 4 Schematic diagram of a display device provided with a reinforcement plate according to some embodiments of the present application;

[0022] Figure 5 A schematic diagram of a display device provided with a reinforcement portion according to some embodiments of the present application;

[0023] Figure 6 Schematic diagram of a display device with multiple reinforcement portions provided in some embodiments of the present application;

[0024] Figure 7-10 A diagram of the actuator structure provided for some embodiments of the present application;

[0025] Figure 11 A schematic diagram of a connection portion provided in some embodiments of the present application forming a hypotenuse of a triangle;

[0026] Figure 12 A diagram of the actuator structure provided for some embodiments of the present application;

[0027] Figure 13 A diagram of the actuator structure provided for some embodiments of the present application. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of some embodiments of the present application more obvious and easy to understand, the technical solutions in some embodiments of the present application will be clearly and completely described below in conjunction with the drawings in some embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] In some embodiments, taking a liquid crystal display device as an example, Figure 1 For the display device structure diagram provided in some embodiments of the present application, refer to Figure 1 The display device includes a panel 1, a backlight assembly 2, a mainboard 3, a power board 4, a rear cover 5, and a base 6. The panel 1 is used to present images to the user; the backlight assembly 2 is located below the panel 1 and is typically composed of optical components that provide sufficient brightness and evenly distributed light sources so that the panel 1 can display images normally. The backlight assembly 2 also includes a backplate 32, on which the mainboard 3 and the power board 4 are mounted. These backplate 32 is typically formed by stamping convex structures, and the mainboard 3 and the power board 4 are fixed to the convex structures by screws or hooks. The rear cover 5 is provided on the panel 1 to conceal components of the display device, such as the backlight assembly 2, the mainboard 3, and the power board 4, for an aesthetically pleasing effect. The base 6 is used to support the display device.

[0030] In some embodiments, Figure 2 Schematic diagram of a display device with screen sound provided in some embodiments of the present application, refer to Figure 2 ,and Figure 1 In comparison, the display device adds a front cover 7 and an exciter 10. The front cover 7 and the rear shell 5 together enclose a storage space, in which the panel 1, the backlight assembly 2, the main board 3, and the power board 4 are placed. At the position corresponding to the panel 1, the front cover 7 is provided with a transparent area 70 to ensure that the image presented by the panel 1 can be displayed normally through the front cover 7. The front cover 7 is also provided with a non-transparent area 71, on which a plurality of exciters 10 are placed, so that the exciters 10 cannot be seen from the front of the display device. When the exciter 10 works, it drives the front cover 7 to vibrate and make sounds. However, this design will increase the thickness of the display device, which is not in line with the trend of thinning development.

[0031] In some embodiments, Figure 3 For a schematic diagram of a display device with screen sound provided in some embodiments of the present application, see Figure 3The display device includes a display panel 31, a back panel 32, and a rear panel 33. The rear panel 33 includes a rear panel body and a frame. The frame protrudes from the rear panel body toward the side of the display panel 31 and is fixedly connected to the back panel 32. Any of the display panel 31, back panel 32, frame, and rear panel body can constitute a first vibrating element. The arrangement of the vibrating element depends on the type of display device 30 and the space after assembly.

[0032] The display panel 31 includes a display area 310 and a BM (Black Matrix) area 311. The display area is used to display images, while the BM area 311 surrounds the display area 310 and is fixedly connected to the backplane 32, typically used for wiring. The exciter 10 is placed at a location corresponding to the BM area 311 to drive the display panel 31 to vibrate and produce sound. The exciter 10 can be placed on any side of the frame 332 along the circumference, and there is no limit on the number of exciters 10.

[0033] In some embodiments, Figure 4 Schematic diagram of a display device provided with a reinforcement plate in some embodiments of the present application, refer to Figure 4 When the exciter 10 is indirectly connected to the display panel 31, a reinforcing plate 34 may be provided between the display panel 31 and the exciter 10. The reinforcing plate 34 has a larger surface area than the end surface area of ​​the exciter 10. After the exciter 10 is connected to the display panel 31 via the reinforcing plate 34, the contact area between the exciter 10 and the display panel 31 is increased, thereby reducing the pressure at the contact point between the display panel 31 and the exciter 10, increasing the strength of the display panel 31, preventing compression damage to the display panel 31, and changing the damping state of the display panel 31, thereby improving the reliability of the display panel 31 and the sound quality. The reinforcing plate 34 may be a carbon fiber board, an aluminum board, or a honeycomb core board, for example.

[0034] In some embodiments, Figure 5 Schematic diagram of a display device with a reinforcement portion provided in some embodiments of the present application, refer to Figure 5The display device includes a frame 332, and the exciter 10 is arranged on the frame 332, with a corresponding marked vibration area 3320. Considering that the vertical dimension of the frame 332 along the display panel 31 is small and the frame 332 is not easily deformed, a reinforcement portion 3321 is provided on the frame 332, and the exciter 10 is arranged at a position of the frame 332 near the reinforcement portion 3321; the reinforcement portion 3321 extends along the length direction of the frame 332, and the depth of the reinforcement 3321 is less than or equal to the thickness of the frame 332. The reinforcement portion 3321 can be a groove-like structure provided on the frame 332, or it can be a through-hole-like structure connecting the inner and outer sides of the frame 332. In this way, the strength of the frame 332 at the position where the reinforcement portion 3321 is provided is reduced. When the exciter 10 is provided at a position of the frame 332 near the reinforcement portion 3321, the exciter 10 can easily push the frame 332 to deform, thereby achieving vibration and sound generation.

[0035] In some embodiments, the extension length of the reinforcement portion 3321 can be adjusted based on the actuator 10 and the display device. Furthermore, since the actuator 10 and the reinforcement portion 3321 are arranged side by side, the width of the reinforcement portion 3321 should not be too large. For example, the width of the reinforcement portion 3321 can be 0.1-0.2 times the width of the frame 332, and the width of the reinforcement portion 3321 can be 0.1 mm-1 mm.

[0036] In some embodiments, the closer the frame 332 is to the center of the reinforcement portion 3321, the more easily the frame 332 deforms. The actuator 10 and the center of the reinforcement portion 3321 are spaced apart along the length of the reinforcement portion 3321, thereby preventing the actuator 10 from being positioned at the center of the reinforcement portion 3321. There may be multiple reinforcement portions 3321, spaced apart vertically along the display panel 31, or spaced apart along the extension direction of the frame 332. Figure 6 Schematic diagram of a display device with multiple reinforcement parts provided in some embodiments of the present application, refer to Figure 6 The reinforcement parts 3321 appear in pairs, and are placed in a combination of horizontal and vertical positions. The combined reinforcement parts are placed on the four corners of the frame, making the frame 332 more prone to vibration.

[0037] In some embodiments, the actuator 10 may be a magnetostrictive actuator. Figure 7-10 This is a diagram of the actuator structure provided by some embodiments of this application. Figures 7 to 10 The magnetostrictive actuators provided in some embodiments of the present application can utilize the magnetostrictive effect to drive the display panel to vibrate and generate sound. The magnetostrictive effect refers to the phenomenon in which a magnetostrictive material, after being magnetized in a magnetic field, stretches or contracts along the magnetization direction. In some embodiments, the magnetostrictive material can be a nickel-based alloy, an iron-based alloy, a ferrite magnetostrictive material, a piezoelectric ceramic material, or the like, and this embodiment is not limiting.

[0038] In some embodiments, the actuator 10 includes a coil 11, a telescopic member 13, and a second elastic vibrating member 14. The actuator 10 also includes a magnetic member 12. The coil 11 is used to generate an alternating magnetic field based on a control signal. The telescopic member 13 can undergo telescopic deformation along the axis of the coil 11 in the superimposed magnetic field of the alternating magnetic field and the magnetic field generated by the magnetic member. The coil 11 is cylindrical. To reduce the size of the actuator 10, the magnetic member 12 and the telescopic member 13 can be disposed within the coil 11. In this way, the magnetic member 12 and the telescopic member 13 are both columnar, such as a prism or a cylinder.

[0039] In some embodiments, the telescopic member 13 may be cylindrical, and the outer diameter of the cylindrical telescopic member 13 may be 3 mm to 5 mm. In order to facilitate relative movement between the telescopic member 13 and the coil 11 , an assembly gap is provided between the coil 11 and the telescopic member 13 .

[0040] In some embodiments, as needed, there can be multiple magnetic members 12 and multiple telescopic members 13, respectively, which are arranged in sequence along the axial direction of the coil 11. For example, one of the telescopic members 13 abuts against the second vibrating member 14. In this way, the dimension of the exciter 10 along the axial direction of the coil 11 is much larger than the dimension of the exciter 10 along the radial direction of the coil 11. The radial direction of the coil 11 can be considered as the minimum dimension of the exciter 10.

[0041] In some embodiments, the exciter 10 further includes a shell 19, and the coil 11 is housed in the shell 19 to protect the coil 11, the magnetic part 12, and the telescopic part 13. The shell 19 can be a magnetic conductive part, and its material can be iron, steel, etc. The coil 11 is connected to an external power supply, an amplifier, and other components to receive a control signal and generate an alternating magnetic field according to the control signal. The magnetic part 12 can be a permanent magnet, etc. The magnetic field generated by the magnetic part 12 can be called a static magnetic field, and the material of the telescopic part 13 can be a ferromagnetic material, a soft magnetic material, a giant magnetostrictive material, etc. that are well known to those skilled in the art. The coil 11, the magnetic part 12, and the telescopic part 13 can all be of types well known to those skilled in the art, and this embodiment does not limit them.

[0042] Among them, the static magnetic field is used to provide a static working point for the telescopic part 13, and the alternating magnetic field provides a dynamic working point for the telescopic part 13. The telescopic coefficient of the telescopic part 13 shows periodic elongation or shortening as the intensity of the superimposed magnetic field of the alternating magnetic field and the static magnetic field changes periodically, thereby driving the second vibrating part 14 to move back and forth, and driving the first vibrating part to vibrate through the second vibrating part 14.

[0043] In some embodiments, the second vibrating member 14 includes a first movable portion 141 and a second movable portion 142 connected to each other. The first movable portion 141 is connected to the main body and is located at the end of the coil 11 along its own axial direction; the second movable portion 142 is connected to the main body and is located laterally of the coil 11 along its own radial direction. The second movable portion 142 is connected to the first vibrating member on the main body. That is, the first movable portion 141 and the second movable portion 142 are connected and form an L-shaped bending structure, and the first movable portion 141 can constitute one of the folded edges of the bending structure and is arranged at the end of the coil 11, and the second movable portion 142 is located on the other folded edge and is arranged laterally of the coil 11 in the radial direction.

[0044] In some embodiments, when the telescopic member 13 is extended or retracted, the first movable portion 141 can reciprocate relative to the end of the coil 11 under the elastic force of the telescopic member 13 or the second vibrating member 14, and the second movable portion 142 can reciprocate under the elastic force of the first movable portion 141 or the second vibrating member 14, and drive the body to vibrate and make sounds, that is, drive the first vibrating member to vibrate and make sounds. Wherein, the reciprocating direction of the second movable portion 142 is set at an angle to the axial direction of the coil 11. When the telescopic member 13 is extended, the first movable portion 141 can move toward the side away from the coil 11 under the support of the telescopic member 13; when the telescopic member 13 is retracted, the first movable portion 141 can move toward the side close to the coil 11 under the action of its own elastic force, so that when the telescopic member 13 is extended or retracted in the superimposed magnetic field, the first movable portion 141 can reciprocate relative to the coil 11. Similarly, the second movable portion 142 can reciprocate under the action of the first movable portion 141 or its own elastic force to achieve driving the first vibrating member to vibrate and make sounds.

[0045] Since the second movable part 142 is located on the radial side of the coil 11, the reciprocating movement direction of the second movable part 142 is set at an angle with the axial direction of the coil 11, that is, the reciprocating movement direction of the first vibrating member is set at an angle with the axial direction of the coil 11. The size of the exciter 10 along the reciprocating movement direction of the first vibrating member is approximately the radial size of the coil 11, and the radial size of the exciter 10 along the coil 11 is much smaller than the axial size of the exciter 10 along the coil 11. In this way, the sizes of the refrigerator 20 and the display device 30 along the reciprocating movement direction of the first vibrating member are relatively small, which is in line with the development trend of flattening display devices.

[0046] For example, when the display device is a display device 30 and the display panel 31 constitutes the first vibrating element, the axis of the coil 11 is set at an angle to the display panel 31. The thickness of the display device 30 can cover the vertical dimension of the actuator 10 along the display panel 31. In other words, the actuator 10 does not increase the thickness of the display device 30, which conforms to the trend of flattening display devices 30. When the display device is a refrigerator 20 and the second housing 23 constitutes the first vibrating element, the axis of the coil 11 is set at an angle to the second housing 23. The thickness of the insulation layer 21 can cover the vertical dimension of the actuator 10 along the second housing 23. In other words, the actuator 10 can minimize the thickness loss of the insulation layer 21, which conforms to the insulation requirements of the refrigerator 20.

[0047] Of course, when the display device is the display device 30 and the frame 332 constitutes the first vibrating member, the first movable part 141 and the second movable part 142 can be respectively arranged along two adjacent sides of the frame 332. In this way, the axis of the coil 11 is not arranged perpendicular to the display panel 31, that is, the exciter 10 will not increase the thickness of the display device 30, which is in line with the flattening development trend of the display device 30.

[0048] In some embodiments, the first movable portion 141 can be slidably connected to the body, allowing the entire first movable portion 141 to reciprocate relative to the coil 11 along the axial direction of the coil 11. In some embodiments, the first end of the first movable portion 141 is fixedly connected to the body, and the second end of the first movable portion 141 is connected to the second movable portion 142. The first movable portion 141 can reciprocate relative to the coil 11, with its first end serving as a fulcrum. The telescopic member 13 is positioned between the first and second ends of the first movable portion 141. Thus, when the telescopic member 13 is extended, it abuts the first movable portion 141, causing the first movable portion 141 to reciprocate with its first end serving as a fulcrum, and the second end of the first movable portion 141 to move away from the coil 11. When the telescopic member 13 is retracted, its elastic force causes the second end of the first movable portion 141 to move toward the coil 11, enabling reciprocating movement of the first movable portion 141. Furthermore, the connection structure between the first movable portion 141 and the body is relatively simple, resulting in low manufacturing costs.

[0049] The telescopic member 13 can abut against different positions of the first moving portion 141 along its own length direction. For example, the telescopic member 13 abuts against the midpoint of the first moving portion 141. In some embodiments, the telescopic member 13 can also be set on one side of the first moving portion 141 close to the first end, see Figure 9 and Figure 10A first spacing L1 is defined between the first end of the first movable portion 141 and the telescopic member 13 along the direction in which the first movable portion 141 extends. A second spacing L2 is defined between the second end of the first movable portion 141 and the telescopic member 13 along the direction in which the first movable portion 141 extends. The first spacing L1 is smaller than the second spacing L2, effectively increasing the reciprocating displacement of the second end of the first movable portion 141 and improving the vibration amplitude of the first vibrating member. This allows the sound emitted by the first vibrating member to have a higher sound pressure level and lower low-frequency frequencies. Exemplarily, the second spacing L2 is 1.5 times the first spacing L1. Thus, the sum of the first spacing L1 and the second spacing L2 is 2.5 times the first spacing L1. Consequently, the reciprocating displacement of the second end of the first movable portion 141 is approximately 2.5 times the displacement of the telescopic member 13.

[0050] In some embodiments, a first reinforcement portion 143 is provided at the first end of the first movable portion 141, and the cross-sectional dimensions of the first reinforcement portion 143 are smaller than the cross-sectional dimensions at other positions of the first movable portion 141. The first reinforcement portion 143 may have different structures. Exemplarily, the first reinforcement portion 143 extends along the length direction of the first movable portion 141, and a step surface is provided between the first reinforcement portion 143 and the first movable portion 141. Alternatively, the first reinforcement portion 143 is a groove structure formed on the first movable portion 141, and the groove structure is provided on the side of the first movable portion 141 facing the coil 11 or on the side facing away from the coil 11, so as to facilitate the first movable portion 141 to flip relative to the coil 11.

[0051] In some embodiments, the closer the reciprocating direction of the second movable portion 142 is to the radial direction of the coil 11, the closer the dimension of the exciter 10 along the reciprocating direction of the first vibrating member is to the radial dimension of the exciter 10 along the coil 11. In other words, the dimension of the exciter 10 along the reciprocating direction of the first vibrating member is smaller. For example, the angle between the reciprocating direction of the second movable portion 142 and the axial direction of the coil 11 can be 60°-120°.

[0052] In some embodiments, the reciprocating direction of the second movable portion 142 is perpendicular to the axial direction of the coil 11. Thus, the first vibrating member does not have any displacement along the axial direction of the coil 11. The dimension of the exciter 10 along the reciprocating direction of the first vibrating member is equal to the radial dimension of the exciter 10 along the coil 11. This effectively reduces the dimension of the exciter 10 along the reciprocating direction of the first vibrating member, which is in line with the trend of flattening display devices.

[0053] In some embodiments, the actuator 10 further includes a connecting portion 147, which is located radially to the side of the coil 11. One end of the connecting portion 147 is connected to the first movable portion 141, and the other end of the connecting portion 147 is connected to the second movable portion 142. The length of the connecting portion 147 extends at an angle to the axial direction of the coil 11. That is, the connecting portion 147 forms a folded edge of the aforementioned L-shaped structure, and one end of the connecting portion 147 is connected to the second movable portion 142. For example, the end of the connecting portion 147 away from the first movable portion 141 extends toward a side away from the coil 11. In this case, the angle between the first movable portion 141 and the connecting portion 147 is an obtuse angle. Furthermore, when the telescopic member 13 is extended, the first movable portion 141 can be moved toward a side away from the coil 11 by the telescopic member 13, and the connecting portion 147 can be moved toward a side closer to the coil 11 by the first movable portion 141. When the telescopic member 13 contracts, the first moving portion 141 moves toward the side close to the coil 11 under its own elastic force. At this time, the connecting portion 147 can move toward the side away from the coil 11 under its own elastic force.

[0054] In some embodiments, one end of the connecting portion 147 is connected to the first movable portion 141, and the other end of the connecting portion 147 extends obliquely toward the side close to the coil 11. In this case, to prevent the second movable portion 142 from interfering with the housing 19, a relief plane 191 can be provided on the side of the housing 19 facing the second movable portion 142, that is, the thickness of the housing 19 facing the second movable portion 142 is reduced, thereby reducing the radial dimension of the exciter 10 along the coil 11. At the same time, to prevent the first vibrating member from interfering with the second movable portion 142, an output member 16 can be provided on the second movable portion 142, protruding toward the side away from the coil 11. The output member 16 is connected to the first vibrating member, and the reciprocating direction of the second movable portion 142 is the same as the reciprocating direction of the output member 16.

[0055] In some embodiments, the second movable portion 142 is detachably connected to the output member 16 and the output portion, and the output member 16 is provided with a fitting surface that fits with the first vibrating member to increase the contact area between the output member 16 and the first vibrating member. In some embodiments, the second movable portion 142 can be arranged along the radial direction of the coil 11, and a groove-shaped structure that reduces strength is provided between the connecting portion 147 and the second movable portion 142. In some embodiments, the second vibrating member 14 further includes a bending portion 144, the two ends of the bending portion 144 are respectively connected to the first movable portion 141 and the second movable portion 142, and the first movable portion 141 and the second movable portion 142 can move relative to each other toward a side close to each other under the elastic force of the bending portion 144. Specifically, when the second vibrating member 14 is provided with a connecting portion 147, the two ends of the bending portion 144 are respectively connected to the first movable portion 141 and the connecting portion 147. Thus, when the telescopic member 13 contracts, the first moving portion 141 moves toward the side close to the coil 11 , and the second moving portion 142 can return to its initial position under the elastic force of the bent portion 144 . The structure of the second vibrating member 14 is relatively simple.

[0056] In some embodiments, a second reinforcement portion 145 is provided on the bent portion 144. The cross-sectional dimensions of the second reinforcement portion 145 are smaller than the cross-sectional dimensions at other locations on the bent portion 144. The structure of the second reinforcement portion 145 can be the same as that of the first reinforcement portion 143. In an exemplary embodiment, both the first reinforcement portion 143 and the second reinforcement portion 145 have groove structures to facilitate relative flipping between the first movable portion 141 and the second movable portion 142.

[0057] In some embodiments, there are two first movable portions 141, one located at each end of the coil 11 along its axis. The second movable portion 142 is connected to the two first movable portions 141 on both sides. In this case, there are also two connecting portions 147, one connected to each of the two first movable portions 141. The second movable portion 142 is connected to the two connecting portions 147 on both sides. In this case, the two first movable portions 141, the second movable portion 142, and the two connecting portions 147 are connected to form a substantially "convex" frame structure or a substantially K-shaped frame structure.

[0058] In some embodiments, the second vibrating member 14 is a metal member with high strength and good elasticity. For example, the second vibrating member 14 can be made of a magnetic material such as steel or iron, or a non-magnetic material such as aluminum.

[0059] In some embodiments, the magnetic member 12 and the telescopic member 13 are arranged along the axial direction of the coil 11 and squeezed between the two first movable parts 141. To prevent the magnetic member 12 and the telescopic member 13 from separating from each other or from the first movable parts 141 after arrangement, a pressing bolt 17 is provided on one of the first movable parts 141 in this embodiment. By adjusting the relative position between the pressing bolt 17 and the first movable part 141, the magnetic member 12 and the telescopic member 13 can be pressed against the other first movable part 141. The squeezing force between the magnetic member 12, the telescopic member 13, and the pressing bolt 17 can be 3MPa-6MPa.

[0060] In some embodiments, a limiting hole 1411 may be provided on the other first movable portion 141. The actuator 10 further includes a limiting member 18. The magnetic member 12 and the telescopic member 13 are arranged along the axis of the coil 11 and squeezed between the pressing bolt 17 and the limiting member 18. A portion of the limiting member 18 extends into the limiting hole 1411. In some embodiments, the limiting member 18 may be a tapered rod. Thus, when the limiting member 18 presses against the first movable portion 141, the limiting hole 1411 can move relative to the outer wall of the tapered rod.

[0061] In some embodiments, in order to avoid the magnetic member 12 and the telescopic member 13, the telescopic member 13 and the pressing bolt 17, the telescopic member 13 and the limiting member 18 being separated from each other, any two adjacent ones of the magnetic member 12, the telescopic member 13, the pressing bolt 17, and the limiting member 18 can be bonded and fixed by an adhesive.

[0062] Take the example of a K-shaped frame structure formed by connecting two first movable parts 141, a second movable part 142 and two connecting parts 147. When the telescopic member 13 is extended, the two first movable parts 141 can be respectively pressed against by the limit member 18 and the pressure bolt 17. The second ends of the two first movable parts 141 move away from each other toward the side away from each other and stretch the two connecting parts 147. At this time, the second movable part 142 and the output member 16 drive the first vibrating member to move toward the side away from the coil 11 along the radial direction of the coil 11 until the two connecting parts 147 are approximately located on the same straight line. When the telescopic member 13 is retracted, the second ends of the two first movable parts 141 flip toward the side close to each other. Under the action of the elastic force of the second vibrating member 14, the second movable part 142 and the output member 16 drive the first vibrating member to move along the radial direction of the coil 11 toward the side close to the coil 11, that is, the second movable part 142 and the output member 16 move back and forth along the radial direction of the coil 11 and drive the first vibrating member to vibrate and produce sound.

[0063] Figure 11 This is a schematic diagram of the connection portion provided in some embodiments of the present application forming the hypotenuse of a triangle. Figure 11, for a right triangle, the sum of the lengths of the two right sides is greater than the length of the hypotenuse, that is, b + c > a, which means a - b < c. Among them, for the second vibrating member 14, during the process of driving the first vibrating member, it will not undergo telescopic deformation itself, that is, the length of the connecting portion 147 will not change. Then, when the two first moving portions 141, the second moving portion 142, and the two connecting portions 147 are connected to form an approximate K-shaped frame structure, the connecting portion 147 can be regarded as the hypotenuse of a right triangle. When the two connecting portions 147 are stretched by the two first moving portions 141 and are on the same straight line, the connecting portion 147 is approximately in a state parallel to the original right side b. At this time, the moving distance of the second end of the first moving portion 141 along the axial direction of the coil is approximately a - b, and the moving distance of the second moving portion 142 is approximately c, that is, the moving distance of the output member 16 is approximately c. As can be seen from the above, a - b < c, that is, the moving distance of the second end of the first moving portion 141 along the axial direction of the coil is less than the moving distance of the output member 16. That is, through the smaller moving distance of the second end of the first moving portion 141, the output member 16 has a larger vibration amplitude.

[0064] In some embodiments, by disposing the telescopic member 13 on one side of the first moving portion 141 close to the first end and simultaneously disposing the connecting portion 147 obliquely, the telescopic amount of the telescopic member 13 can be magnified twice, and the output member 16 has a larger vibration amplitude, which can push the first vibrating member to emit a sound with a larger sound pressure level. When the thickness or weight of the first vibrating member is relatively large, Figure 12 The structural diagram of the actuator provided by some embodiments of the present application is shown in Figure 12 , in some embodiments, the actuator 10 includes a plurality of second vibrating members 14, the plurality of second vibrating members 14 are arranged in parallel, and the plurality of second moving portions 142 of the plurality of second vibrating members 14 are fixedly connected. In this way, the first vibrating member can be vibrated and sounded simultaneously by the plurality of second vibrating members 14, the driving force of the actuator 10 is increased, the vibration amplitude of the output member 16 is relatively large, and the sound pressure level of the sound emitted by the first vibrating member is relatively large. Among them, the number of the second vibrating members 14 can be two or more.

[0065] In some embodiments, the number of the actuators 10 is multiple, and the multiple actuators 10 are arranged at intervals on the body. In this way, the multiple actuators 10 can form a stereo system to optimize the user experience.

[0066] In some embodiments, the exciter 10 further includes a counterweight 15, which is used to be fixedly connected to the body, and the first movable portion 141 and the coil 11 are both connected to the counterweight 15; wherein the minimum dimension direction of the counterweight 15 is arranged parallel to the thickness direction of the body. Wherein, when the display device is a display device 30, the thickness direction of the body is the vertical direction of the display panel 31, and according to the fixed position of the exciter 10, the counterweight 15 can be connected to the back plate 32 or the rear plate 33. When the display device is a refrigerator 20, the counterweight 15 is fixedly connected to the insulation layer 21, and the thickness direction of the body refers to the thickness direction of the insulation layer 21 at the location of the exciter 10. In this way, the counterweight 15 can be covered by the thickness of the body itself, avoiding the counterweight 15 from increasing the thickness of the body.

[0067] In some embodiments, the counterweight 15 is relatively heavy, and the second vibrating member 14 and the coil 11 are fixedly connected to the main body via the counterweight 15. This prevents the exciter 10 from having insufficient force at the output member 16 to drive the first vibrating member of the display device to vibrate and produce sound, as the second vibrating member 14 drives the first vibrating member.

[0068] In some embodiments, the counterweight 15 can be made of a metal such as stainless steel, and the weight of the counterweight 15 can be selected based on parameters such as the thrust of the actuator 10. In some embodiments, the first ends of the two first movable portions 141 can be directly fixedly connected to the counterweight 15. Of course, the second vibrating member 14 can also include a fixed portion 146, which is used to connect to the counterweight 15, and the two ends of the fixed portion 146 are used to connect to the two first movable portions 141, so that the first movable portions 141 can be easily flipped using their first ends as fulcrums.

[0069] In some embodiments, the shape and size of the counterweight 15 can be set as needed. Figure 4 and Figure 7 When the display panel 31 constitutes the first vibrating element, the axis of the coil 11 is arranged parallel to the display panel 31 , and the minimum dimension direction of the counterweight 15 is arranged perpendicular to the display panel 31 .

[0070] Figure 13The exciter structure diagram provided for some embodiments of the present application shows that when the frame 332 located on the top side constitutes the first vibrating element, the axis of the coil 11 is arranged parallel to the display panel 31, the maximum dimension of the counterweight 15 is arranged in the vertical direction, and the minimum dimension of the counterweight is arranged perpendicular to the display panel 31. The exciter 10 is arranged between the back plate 32 and the rear plate 33, which does not increase the thickness of the display device 30. When the frame 332 located on the left or right side constitutes the first vibrating element, the axis of the coil 11 is arranged parallel to the display panel 31, the maximum dimension of the counterweight 15 is arranged in the horizontal direction, and the minimum dimension of the counterweight is arranged perpendicular to the display panel 31. The exciter 10 is arranged between the back plate 32 and the rear plate 33, which does not increase the thickness of the display device 30. In this way, the thickness of the display device, i.e., the thickness of the display device 30 and the thickness of the thermal insulation layer 21, will not be significantly increased due to the addition of the counterweight 15, which is in line with the development trend of flattening display devices.

[0071] In some embodiments, some embodiments of the present application further provide an exciter 10, which includes a coil 11; a telescopic member 13, the telescopic member 13 can undergo telescopic deformation along the axial direction of the coil 11; a second vibrating member 14, the second vibrating member 14 includes a first movable portion 141 and a second movable portion 142 connected to each other, the first movable portion 141 is used to connect to the display device, and the first movable portion 141 is located at the end of the coil 11 along its own axial direction; the second movable portion 142 is used to connect to the display device, and the second movable portion 142 is located on the side of the coil 11 along its own radial direction; when the telescopic member 13 is extended and retracted, the first movable portion 141 can move back and forth relative to the end of the coil 11 under the action of the elastic force of the telescopic member 13 or the second vibrating member 14, and the second movable portion 142 can move back and forth under the action of the elastic force of the first movable portion 141 or the second vibrating member 14, and drive the display device to vibrate and make sound; wherein, the reciprocating movement direction of the second movable portion 142 is set at an angle to the axial direction of the coil 11. The structure, function and beneficial effects of the actuator 10 have been described in the above embodiments and will not be repeated in this embodiment.

[0072] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A display device, characterized in that: include: A display panel, the display panel including a display area and a non-display area; a magnetostrictive actuator, disposed at a position corresponding to the non-display area of ​​the display panel; The magnetostrictive actuator includes a telescopic member, two first movable parts, and two second movable parts; in a static state, the two first movable parts are respectively arranged perpendicular to the telescopic member, and the two second movable parts are respectively arranged at an angle to the telescopic member; The magnetostrictive actuator further includes a coil, wherein the two first movable portions are respectively located at two ends of the coil along its own axial direction, and the two second movable portions are located on the sides of the coil along its own radial direction; The magnetostrictive actuator further includes two connecting portions, each located laterally of the coil along its radial direction, one end of each connecting portion being connected to each of the two first movable portions, and the other end of each connecting portion being connected to each of the two second movable portions; a lengthwise extension direction of each connecting portion forms an angle with the axial direction of the coil; and one end of each connecting portion connected to the second movable portion extends obliquely toward a side closer to the coil. The two first moving parts, the two second moving parts and the two connecting parts are connected to form an approximately K-shaped frame structure.

2. The display device according to claim 1, wherein Also includes: A reinforcing plate is located between the display panel and the magnetostrictive actuator.

3. The display device according to claim 1, wherein Also includes: A frame surrounding the display panel, wherein the frame is provided with a frame reinforcement portion; The magnetostrictive actuator is placed on the frame and arranged side by side with the frame reinforcement portion.

4. The display device according to claim 1, wherein The first end of the first movable part is fixedly connected to the body of the magnetostrictive actuator, and the second end of the first movable part is connected to the second movable part. The first movable part can flip back and forth relative to the coil with its first end as a fulcrum, and the telescopic part is located between the first end and the second end of the first movable part.

5. The display device according to claim 4, wherein: There is a first distance between the first end of the first moving part and the telescopic member along the extension direction of the first moving part, and there is a second distance between the second end of the first moving part and the telescopic member along the extension direction of the first moving part. The first distance is smaller than the second distance.

6. The display device according to claim 1, wherein A first reinforcement portion is provided at the first end of the first movable portion, and a cross-sectional dimension of the first reinforcement portion is smaller than a cross-sectional dimension at other positions of the first movable portion.

7. The display device according to claim 1, wherein The coil is cylindrical, and the telescopic member is cylindrical.

8. The display device according to claim 1, wherein It also includes a bending portion, both ends of which are connected to the first moving portion and the second moving portion respectively. The first moving portion and the second moving portion can move relatively toward one side close to each other under the elastic force of the bending portion.

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