Display device

Abstract

The present invention provides a display device comprising a display screen, the display screen comprising a display area and a non-display area, the display area being used to display images, the non-display area being enclosed outside the display area; a back plate fixedly connected to the non-display area; and an exciter comprising a vibrating member connected to the back plate, the vibration of the vibrating member being capable of being transmitted to the back plate, thereby driving the non-display area to vibrate and produce sound through the back plate. The display device provided by the present invention can produce sound through the vibration of the display screen.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device. Background Art

[0002] With the development of science and technology and the improvement of people's living standards, display devices such as LCD TVs are increasingly used in people's work and life.

[0003] The display device includes a display screen and a diffuser film, a light guide plate, and a reflector stacked behind the display screen. The display device also includes a backlight source, which can be positioned between the light guide plate and the reflector so that light emitted by the backlight source is directed toward the display screen. To reduce manufacturing costs, the display screen, diffuser film, light guide plate, and reflector are assembled in direct contact, resulting in an air layer between any adjacent display screens, diffuser film, light guide plate, and reflector.

[0004] Since the air layer cannot transmit vibrations between adjacent elements, the display device cannot achieve vibration and sound generation by the display screen. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present invention provides a display device that can produce sound through vibration of the display screen.

[0006] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] An embodiment of the present invention provides a display device comprising a display screen, the display screen comprising a display area and a non-display area, the display area being used to display images, the non-display area being disposed outside the display area; a back panel fixedly connected to the non-display area; and an exciter, the exciter comprising a vibrating member connected to the back panel, the vibration of the vibrating member being transmitted to the back panel, thereby driving the non-display area to vibrate and produce sound. In this way, the exciter can drive the back panel to vibrate, and the vibration of the back panel is transmitted to the non-display area, thereby causing the non-display area, i.e., the display screen, to vibrate and produce sound.

[0008] In some embodiments, the back panel includes: a back panel body, the back panel body being fixedly connected to the non-display area; and a vibration portion, the vibration portion being disposed at a position of the back panel corresponding to the non-display area, the vibration portion being connected to a vibration member, and being capable of deforming under vibration of the vibration member and reciprocating relative to the back panel body. Thus, the back panel is composed of two parts: the back panel body is fixedly connected to the non-display area, the connection between the back panel and the display screen is highly stable, the vibration portion is capable of deforming relative to the back panel body, and the exciter can more conveniently drive the vibration portion to reciprocate relative to the back panel body, thereby driving vibration in the non-display area via the vibration portion.

[0009] In some embodiments, a reinforcement portion is provided on the back plate, extending vertically through the back plate; portions of the back plate located on either side of the reinforcement portion constitute the vibrating portion. The reinforcement portion extends through the back plate, so that the portions of the back plate located on either side of the reinforcement portion have lower strength and greater deformation capacity, thereby facilitating the exciter-driven vibration of the back plate body.

[0010] In some embodiments, there are two reinforcement sections, arranged side by side, with the direction of parallel arrangement perpendicular to the direction of extension of the reinforcement sections. The portion of the backplate between the two reinforcement sections constitutes the vibrating section. The reinforcement sections can reduce the strength of the backplate at the location where the exciter is located, thereby allowing the vibrating section to have a larger vibration amplitude.

[0011] In some embodiments, the width of the two ends of the vibration part is smaller than the width of other positions of the vibration part, so as to help increase the vibration amplitude of the vibration part and improve the sound pressure level of the sound emitted by the display screen.

[0012] In some embodiments, the backplate includes multiple connecting portions spaced apart along the circumference of the vibrating portion. Each connecting portion has a first end connected to the vibrating portion, and a second end connected to the backplate body. Driven by the vibrating portion, the connecting portions can flip with their second ends serving as fulcrums. This ensures that the vibration amplitude of the vibrating portion relative to the backplate body is unaffected by factors such as the backplate's thickness and material.

[0013] In some embodiments, the connecting portion is bent along its length, so that the connecting portion has greater elasticity and the vibration portion can easily move relative to the back plate body to drive the non-display area to vibrate and generate sound.

[0014] In some embodiments, the back panel body is provided with an avoidance notch, and the vibration part is accommodated in the avoidance notch. In this way, the vibration part does not protrude from the side wall surface of the back panel body, and the bonding stability between the back panel body and the non-display area is higher.

[0015] In some embodiments, the exciter further includes an exciter body, the vibrating member is connected to the exciter body and can reciprocate relative to the exciter body; the exciter body is fixedly connected to the backplate body.

[0016] In some embodiments, the display device further includes a buffer member disposed between the vibration portion and the non-display area and capable of elastically deforming under the influence of the vibration portion to prevent the non-display area from being broken.

[0017] In some embodiments, the actuator is any one of an electromagnetic actuator, a magnetostrictive actuator, and a piezoelectric actuator, which has high applicability.

[0018] In some embodiments, there are multiple exciters, and the multiple exciters are arranged at intervals along the circumference of the display screen. In this way, the multiple exciters can form a stereo system, which improves the user experience.

[0019] In some embodiments, the display device further includes a speaker, and the speaker and the actuator are spaced apart along the circumference of the display screen.

[0020] In some embodiments, the display device also includes a controller; a first filter, the input end of the first filter is connected to the controller; a limiter, the two ends of the limiter are respectively connected to the output end of the first filter and the input end of the exciter; a second filter, the input end of the second filter is connected to the controller, and the output end of the second filter is connected to the speaker; a third filter, the input end of the third filter is connected to the controller, and when the input signal of the exciter is greater than a preset value, the output end of the third filter is connected to the input end of the second filter.

[0021] Thus, by providing the first and second filters, the sound emitted by the speaker and the sound emitted from the non-display area can be combined to maintain a relatively flat frequency response curve. Furthermore, by providing the third filter, the display device can have a larger dynamic range, maintaining a relatively flat frequency response curve even when the volume of the display device is increased.

[0022] In addition to the technical problems solved by the embodiments of the present invention 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 device provided by the embodiments of the present invention, 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

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic structural diagram of a display device provided in an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of a display device provided in an embodiment of the present invention when multiple actuators are provided;

[0026] Figure 3 A schematic structural diagram of a display device provided by an embodiment of the present invention when both a speaker and an actuator are provided;

[0027] Figure 4 for Figure 1 Schematic diagram of the structure of the back plate Figure 1 ;

[0028] Figure 5 for Figure 1 Schematic diagram of the structure of the back plate Figure 2 ;

[0029] Figure 6 for Figure 1 Schematic diagram of the structure of the back plate Figure 3 ;

[0030] Figure 7 for Figure 1 Schematic diagram of the structure of the display screen;

[0031] Figure 8 for Figure 1 Schematic diagram of the structure of part A;

[0032] Figure 9 for Figure 6 Schematic diagram of the structure when the back plate is connected to the exciter Figure 1 ;

[0033] Figure 10 for Figure 6 Schematic diagram of the structure when the back plate is connected to the exciter Figure 2 ;

[0034] Figure 11 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 1 ;

[0035] Figure 12 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 2 ;

[0036] Figure 13 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 3 ;

[0037] Figure 14 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 4 ;

[0038] Figure 15 for Figure 3 System architecture diagram of the display device;

[0039] Figure 16 for Figure 3 Schematic diagram of the frequency response curve of the speaker, the driver, and the superposition of the speaker and the driver Figure 1 ;

[0040] Figure 17 for Figure 3 Schematic diagram of the frequency response curve of the speaker, the driver, and the superposition of the speaker and the driver Figure 2 ;

[0041] Figure 18 for Figure 3 Schematic diagram of the frequency response curve of the speaker, the driver, and the superposition of the speaker and the driver Figure 3 .

[0042] Reference numerals:

[0043] 10: display screen; 11: display area; 12: non-display area;

[0044] 20: back plate; 21: back plate body; 22: vibration part; 23: reinforcement part; 24: connection part; 25: avoidance gap;

[0045] 30: exciter; 31: vibrating element; 32: exciter body;

[0046] 40: buffer;

[0047] 50: first adhesive member;

[0048] 60: back shell;

[0049] 70: Speaker;

[0050] 80: circuit board;

[0051] 90: display module;

[0052] X: parallel direction; Y: extension direction; Z: vertical direction. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0054] In the related art, display devices include liquid crystal display (LCD) display devices, organic light-emitting diode (OLED) display devices, and the like.

[0055] To reduce manufacturing costs, LCD displays utilize direct contact between the display screen, diffuser film, light guide plate, and reflector. This creates an air layer between any two adjacent panels. Because this air layer cannot transmit vibrations between adjacent panels, LCD displays cannot generate sound through screen vibrations and must instead generate sound through speakers. However, compared to surface vibration, the sound pressure level from speakers is lower.

[0056] In view of this, the display device provided in the embodiment of the present application is provided with an exciter, which is connected to the back panel of the display device, and the back panel is connected to the non-display area of ​​the display screen. In this way, the exciter can drive the non-display area to vibrate and make sound, and the sound of the display device can have a larger sound pressure level.

[0057] Figure 1 A schematic structural diagram of a display device provided by an embodiment of the present invention. Figure 2 A schematic structural diagram of a display device provided by an embodiment of the present invention when multiple actuators are provided. Figure 3 This is a schematic structural diagram of a display device provided by an embodiment of the present invention when a speaker and an exciter are provided at the same time. Figure 4 for Figure 1 Schematic diagram of the structure of the back plate Figure 1 . Figure 5 for Figure 1 Schematic diagram of the structure of the back plate Figure 2 . Figure 6 for Figure 1 Schematic diagram of the structure of the back plate Figure 3 . Figure 7 for Figure 1 Schematic diagram of the structure of the display screen. Figure 8 for Figure 1 Schematic diagram of the structure of part A. Figure 9 for Figure 6 Schematic diagram of the structure when the back plate is connected to the exciter Figure 1 . Figure 10 for Figure 6 Schematic diagram of the structure when the back plate is connected to the exciter Figure 2 .

[0058] See also Figures 1 to 10 An embodiment of the present application provides a display device, which includes a display screen 10, the display screen 10 includes a display area 11 and a non-display area 12; a back panel 20 and an exciter 30, the exciter 30 includes a vibrating member 31, the vibrating member 31 is connected to the back panel 20, and the vibration of the vibrating member 31 can be transmitted to the back panel 20, so as to drive the non-display area 12 to vibrate and make sound through the back panel 20.

[0059] Specifically, the display device further includes a rear cover 60 and a display module 90 . The display module 90 includes a reflective sheet (not shown), a light guide plate (not shown), an optical film (not shown), and a light source (not shown) located on one side of the back panel 20 .

[0060] The display device includes a top side, a left side, a right side, and a ground side. The top side and the ground side are opposite, and the left side and the right side are opposite. The top side is connected to one end of the left side and one end of the right side, respectively, and the ground side is connected to the other end of the left side and the other end of the right side, respectively. The display device also includes a front side and a rear side. The front side is located on the side where the display screen 10 is located, and the rear side is located on the side where the rear housing 60 is located.

[0061] The display area 11 is used to display images, and the non-display area 12 is disposed outside the display area 11. The back panel 20 is fixedly connected to the non-display area 12. For example, the non-display area 12 is fixedly connected to the edge of the back panel 20 via a first adhesive member 50. The first adhesive member 50 can be foam, double-sided tape, or the like.

[0062] The light source is used to generate light and is located on the ground side of the display device. The light source is provided in the form of a light bar. The display device also includes a circuit board 80 and multiple LED lights located on the circuit board 80. The light emitted by the light source enters from one side.

[0063] The reflector is used to reflect light in the direction of light emission, which is conducive to the uniform distribution of light emitted by the light source. The reflector is fixed to the surface of the back plate 20. The reflector has a white reflective surface and is made of PET.

[0064] The light guide plate includes a light incident side and a light output side. The light source is located on the light incident side of the light guide plate. The light entering from the light incident side is emitted from the light output side of the light guide plate by utilizing the refraction and total reflection effects of the light guide plate, thereby converting the line light source into a surface light source.

[0065] The reflective sheet is located on a side opposite to the light emitting side of the light guide plate.

[0066] The material of the light guide plate is glass, PMMA or PC.

[0067] The optical film is located on the light-emitting side of the light guide plate and is used to brighten the light.

[0068] The optical film may include one or more films, including at least one of a prism film and a brightness enhancement film.

[0069] The actuator 30 is used to drive the sound-generating element to vibrate and generate sound. In some embodiments, the actuator 30 is any one of an electromagnetic actuator, a magnetostrictive actuator, and a piezoelectric actuator, which are highly applicable. The actuator 30 includes a vibrating element 31. When the actuator 30 is an electromagnetic actuator, the vibrating element 31 may be a voice coil. When the actuator 30 is a magnetostrictive actuator, the vibrating element 31 may be a magnetostrictive rod.

[0070] In some embodiments, the sound-generating element is a display screen 10. The non-display area 12 is connected to the edge of the back panel 20. Thus, when the vibrating element 31 vibrates, it drives the back panel 20 to vibrate. The vibration of the back panel 20 is transmitted to the non-display area 12, causing it to vibrate and produce sound.

[0071] In some embodiments, the vibration member 31 is connected to the edge of the back panel 20, so that the vibration of the back panel 20 can be directly transmitted to the non-display area 12, the transmission path of the vibration of the back panel 20 is smaller, and the vibration energy loss is smaller.

[0072] In some embodiments, the back plate 20 may be made of aluminum alloy, steel, or the like. When the display screen 10 is small, the back plate 20 may be made of aluminum alloy or thinner steel. When the display screen 10 is large, the back plate 20 may be made of steel, and the thickness of the back plate 20 may be greater.

[0073] In some embodiments, the vibration member 31 may also be indirectly connected to the back plate 20. Considering the low damping of the back plate 20, a damping member may be provided between the vibration member 31 and the back plate 20 to increase the damping at the connection point of the vibration member 31 on the back plate 20. This improves the damping of the non-display area 12, expands the frequency range of the sound emitted by the non-display area 12, and prevents the sound emitted from the non-display area 12 from producing obvious peaks and valleys and distortion that affects the listening experience.

[0074] In some embodiments, the damping member may be a honeycomb sandwich panel, a foam sandwich panel, a wood sandwich panel, or an acrylic panel, which are low-cost and readily available. The damping member may also be a foamed material such as polyurethane.

[0075] It is understood that back panels 20 made of different materials and having different thicknesses have different Young's moduli, that is, they have different abilities to resist deformation. Therefore, the Young's modulus of the back panel 20 can be reduced by reducing its thickness or using a material that is easily deformed, such as aluminum alloy, to improve the deformation ability of the edge of the back panel 20.

[0076] In order to facilitate the deformation of the edge of the back panel 20, in some embodiments, the back panel 20 includes a back panel body 21, which is fixedly connected to the non-display area 12; a vibration part 22, which is arranged at a position of the back panel 20 corresponding to the non-display area 12, and is connected to the vibration member 31. The vibration part 22 can be deformed under the vibration of the vibration member 31 and move back and forth relative to the back panel body 21.

[0077] That is, the back panel 20 is composed of a two-part structure of a back panel body 21 and a vibration part 22. The back panel body 21 is relatively fixed to the non-display area 12 by the first adhesive 50, and the relative displacement between the back panel body 21 and the non-display area 12 is small. However, the vibration part 22 and the non-display area 12 are not relatively fixed, the Young's modulus of the vibration part 22 is small, and there is a large relative displacement between the vibration part 22 and the non-display area 12. When the exciter 30 is working, the vibration part 22 can move back and forth relative to the back panel body 21 with the vibration member 31, and the back panel body 21 will not be deformed, and the back panel body 21 and the non-display area 12 can still have a relatively stable connection.

[0078] In some embodiments, the vibration portion 22 itself can be deformed to achieve relative movement between the vibration portion 22 and the back plate body 21. A reinforcement portion 23 is provided on the back plate 20, extending vertically through the back plate 20; portions of the back plate 20 located on either side of the reinforcement portion 23 constitute the vibration portion 22.

[0079] The number of the reinforcement portion 23 can be one, and the reinforcement portion 23 extends in different directions. Figure 4 When the reinforcement portion 23 extends along the edge of the back plate 20, the vibration portion 22 refers to Figure 4 The area enclosed by the dashed line. Figure 5 When the reinforcing portion 23 is arranged perpendicular to the edge of the back plate 20 along the extension direction, the portion of the back plate 20 located on both sides of the extension portion refers to Figure 5 The area enclosed by the middle dotted line may have a width of 2 to 3 times the width of the reinforcement portion 23 .

[0080] There can be two reinforcement portions 23, with the parallel direction X of the two reinforcement portions 23 being perpendicular to the extension direction Y of the reinforcement portions 23. The portion of the back panel 20 located between the two reinforcement portions 23 constitutes the vibration portion 22. In this way, the vibration portion 22 as a whole can have a large deformation. When the vibrating member 31 vibrates, the vibration portion 22 is driven by the vibrating member 31 to deform and protrude from the side wall of the back panel 20, thereby driving the non-display area 12 to vibrate and generate sound.

[0081] The parallel direction X and the extension direction Y can extend along the adjacent two sides of the back plate 20 respectively. In this case, the parallel direction X and the extension direction Y are respectively perpendicular to the vertical direction Z. For example, Figure 11 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 1 See Figure 6 and Figure 11 , the extension direction Y is the edge extension direction of the back plate 20.

[0082] It is understood that when the vibrating portion 22 is located between the two reinforcement portions 23, the vibrating portion 22 moves relative to the back plate body 21 by virtue of its own deformation, and the closer the vibrating portion 22 is to the end of the reinforcement portion 23, the smaller the deformation of the vibrating portion 22. Therefore, the vibrating member 31 can be located in the middle of the vibrating portion 22 along the extension direction Y. In some embodiments, the distance between the vibrating member 31 and one end of the reinforcement portion 23 can be 0.2-0.8 times the extended length of the reinforcement portion 23.

[0083] The vibration part 22 can be a plate-shaped structural member of equal width. In order to facilitate the deformation of the vibration part 22 driven by the vibration member 31, in some embodiments, when the vibration part 22 is located between the two reinforcement parts 23, please refer to Figure 6 and Figure 11 The width of the two ends of the vibration part 22 along the parallel direction X is smaller than the width of other positions of the vibration part 22 along the parallel direction X, that is, the size of the middle part of the vibration part 22 is larger and the sizes of the two ends of the vibration part 22 are smaller.

[0084] In some embodiments, regarding the vibration part 22 , please refer to FIG9 . The size of the vibration part 22 along the arrangement direction can be gradually changed. In this way, the strength of the vibration part 22 is higher, and the vibration part 22 is prevented from being broken during the vibration process.

[0085] In some embodiments, see Figure 6 , for the strengthening portion 23, along the extension direction Y of the strengthening portion 23, the strengthening portion 23 can be a strip hole of equal width. Of course, please refer to Figure 11 The widths of the two ends of the reinforcement portion 23 may be greater than the width of the middle portion of the reinforcement portion 23 . This embodiment does not limit the shapes of the reinforcement portion 23 and the vibration portion 22 .

[0086] Figure 12 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 2 . Figure 13 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 3 . Figure 14 for Figure 6 Schematic diagram of the structure of the middle vibration part Figure 4 .

[0087] See also Figures 12 to 14 In some embodiments, an elastic connection structure may be provided between the vibration part 22 and the back plate body 21 , and the relative movement between the vibration part 22 and the back plate body 21 may be achieved through the expansion and contraction of the elastic connection structure.

[0088] Specifically, the back panel 20 includes a plurality of connecting parts 24, which are arranged at circumferential intervals along the vibration part 22. The first end of each connecting part 24 is connected to the vibration part 22, and the second end of each connecting part 24 is connected to the back panel body 21; the connecting part 24 can be flipped with the second end as the fulcrum under the drive of the vibration part 22.

[0089] The connecting portion 24 can have various structures. In some embodiments, the connecting portion 24 can be a spring, etc. Thus, through the reciprocating expansion and contraction of the connecting portion 24, the vibrating member 31 can drive the vibrating portion 22 to move back and forth toward or away from the display screen 10.

[0090] In some embodiments, the connecting portion 24 may be a strip-shaped structural member, which can achieve relative movement between the vibration portion 22 and the back plate body 21 through its own bending and deformation. Figure 6 , the extending direction of the connecting portion 24 can be set parallel to the extending direction of the vibration portion 22.

[0091] See also Figures 12 to 14 In some embodiments, the connecting portion 24 is bent along its length. In this way, the connecting portion 24 is easily deformed, and the vibration amplitude of the vibrating member 31 can be effectively transmitted to the vibrating portion 22, avoiding the loss of vibration energy of the vibrating member 31.

[0092] The vibration part 22 and the back plate body 21 can be two independent components, and the vibration part 22 is arranged on the side of the back plate body 21 facing the display screen 10. In some embodiments, please refer to Figures 12 to 14 The back plate body 21 is provided with an avoidance gap 25 , and the vibration part 22 and the plurality of connection parts 24 are all accommodated in the avoidance gap 25 .

[0093] In this way, when the back panel body 21 and the non-display area 12 are bonded and fixed by the first adhesive 50, the vibration part 22 or the connection part 24 protrudes from the back panel body 21, causing the back panel body 21 and the non-display area 12 to separate from each other and become loosely bonded.

[0094] In some embodiments, the vibration part 22 and the connection part 24 can be integrally formed with the back plate body 21. Figures 12 to 14 The vibration part 22 and the connection part 24 can be formed by punching holes on the back plate 20. At this time, the side walls of the vibration part 22 and the connection part 24 are located on the same plane as the side walls of the back plate body 21.

[0095] The exciter 30 also includes an exciter body 32. The vibrating member 31 is connected to the exciter body 32 and can reciprocate relative to the exciter body 32. The exciter body 32 can be connected to the vibrating portion 22 and, relying on the weight of the exciter body 32, drives the vibrating portion 22 to vibrate. This increases the equivalent weight and density of the vibrating portion 22, helping the vibrating portion 22 to excite low-frequency sound, thus meeting the low-frequency sound design requirements of the display device.

[0096] In some embodiments, the exciter body 32 is fixedly connected to the backplate body 21. For example, the exciter body 32 can be fixedly connected to the backplate body 21 by screwing, riveting, or bonding. In this way, the exciter body 32 is relatively fixed to the backplate body 21. When the exciter 30 is in operation, the vibrating member 31 can expand and contract relative to the exciter body 32, thereby driving the vibrating portion 22 to reciprocate.

[0097] In some embodiments, the display device further includes an elastic buffer 40 , which is disposed between the vibration portion 22 and the non-display area 12 .

[0098] The buffer member 40 may be fixedly connected to at least one of the vibration portion 22 and the non-display area 12. In some embodiments, the buffer member 40 may be fixedly connected to both the vibration portion 22 and the non-display area 12 to prevent collision noise between the vibration portion 22, the buffer member 40, and the non-display area 12 during vibration of the vibration portion 22.

[0099] The buffer member 40 can be made of rubber, silicone or other materials and is fixedly connected to the vibration part 22 and the non-display area 12 via a second adhesive. Of course, the buffer member 40 itself can also be a sticky component such as foam or double-sided tape to mitigate the impact on the non-display area 12.

[0100] In some embodiments, the buffer member 40 can have a relatively high rigidity. For example, the rigidity of the buffer member 40 is greater than that of the first adhesive member 50. This allows the vibration amplitude of the vibrating portion 22 to be effectively transmitted to the non-display area 12, reducing the loss of the vibration energy of the vibrating portion 22 at the buffer member 40, thereby ensuring that the sound emitted by the non-display area 12 has a predetermined sound pressure level. Furthermore, the first adhesive member 50 has a relatively low rigidity. During vibration of the non-display area 12, relative movement between the non-display area 12 and the back panel body 21 is permitted, thereby preventing shear deformation between the two portions of the non-display area 12 corresponding to the buffer member 40 and the first adhesive member 50.

[0101] In some embodiments, there are multiple exciters 30, and the multiple exciters 30 are spaced apart along the circumference of the display screen 10. In this way, the multiple exciters 30 can form a stereo system to optimize the user experience.

[0102] Therefore, multiple actuators 30 can be set at any position around the display screen 10, and the center of the sound image perceived by the user is approximately located at the center of the display screen 10.

[0103] In some embodiments, when the width of the non-display area 12 is relatively large, for example, 20 mm to 30 mm, the non-display area 12 may have a relatively large vibration amplitude, and the sound quality of the sound emitted by the non-display area 12 may be relatively good.

[0104] When the width of the non-display area 12 is small, for example, 3mm-5mm, the vibration amplitude of the non-display area 12 is small, the sound pressure level of the sound emitted by the non-display area 12 is low, and the bass effect is poor. In some embodiments, the display device further includes a speaker 70, and the speaker 70 and the actuator 30 are spaced apart along the circumference of the display screen 10. Thus, by using the speaker 70 and the actuator 30 in conjunction, the sound emitted by the speaker 70 and the sound emitted by the non-display area 12 can be superimposed, and the superimposed sound has a higher sound pressure level in the low-frequency range.

[0105] Figure 15 for Figure 3 Figure 2 shows the system architecture diagram of the display device. Figure 16 for Figure 3 Schematic diagram of the frequency response curve of the speaker, the driver, and the superposition of the speaker and the driver Figure 1 . Figure 17 for Figure 3 Schematic diagram of the frequency response curve of the speaker, the driver, and the superposition of the speaker and the driver Figure 2 . Figure 18 for Figure 3 Schematic diagram of the frequency response curve of the speaker, the driver, and the superposition of the speaker and the driver Figure 3 .

[0106] See also Figures 15 to 18 The display device also includes a controller; a first filter, an input end of the first filter is connected to the controller; a limiter, two ends of the limiter are respectively connected to the output end of the first filter and the input end of the exciter 30; a second filter, an input end of the second filter is connected to the controller, and an output end of the second filter is connected to the speaker 70; a third filter, an input end of the third filter is connected to the controller, and when the input signal of the exciter 30 is greater than a preset value, the output end of the third filter is connected to the input end of the second filter.

[0107] Among them, curve B1 is the frequency response curve of the sound emitted by the non-display area 12, and curve C1 is the frequency response curve of the sound emitted by the speaker 70. Considering that the speaker 70 can emit sound of the full frequency band, and the high frequency band of the sound emitted by the non-display area 12 is louder, for example Figure 17As shown, the volume of the sound in the frequency band greater than 1000 Hz is relatively low, while the volume of the sound in the low frequency band less than 1000 Hz is relatively low. In some embodiments, to make the superimposed sound have a relatively flat frequency response curve, the second filter can be used to attenuate the frequency band greater than 1000 Hz of the sound emitted by the speaker 70, while the first filter can be used to attenuate the frequency band less than 1000 Hz of the sound emitted by the non-display area 12. In this way, the sound emitted by the speaker 70 and the sound emitted by the non-display area 12 can be superimposed to have a relatively flat frequency response curve as shown by curve D1.

[0108] Considering that the actuator 30 drives the non-display area 12 to vibrate and produce sound through the vibration part 22, a large vibration amplitude of the vibration part 22 may cause cracks in the non-display area 12. Therefore, the output end of the first filter is connected to a limiter to limit the maximum output voltage of the control signal of the actuator 30.

[0109] In some embodiments, the control signal of the driver 30 output by the limiter may be output to the driver 30 after passing through the first amplifier. The control signal output by the second filter may also be output to the speaker 70 after passing through the second amplifier.

[0110] Thus, within the frequency band of the superimposed sound greater than 1000 Hz, the sound emitted by the non-display area 12 has a larger proportion than the sound emitted by the speaker 70. Within the frequency band of the superimposed sound less than 1000 Hz, the sound emitted by the speaker 70 has a larger proportion than the sound emitted by the non-display area 12.

[0111] In some embodiments, the dynamic range of the speaker 70 is different from that of the driver 30. For example, see Figure 17 and Figure 18 When the input signal increases, curves B2 and B3 show how the frequency response curves of the sound emitted by the non-display area 12 change, while curves C2 and C3 show how the frequency response curves of the sound emitted by the speaker 70 change. That is, when the input signal increases, the volume change of the sound emitted by the speaker 70 is approximately twice the volume change of the sound emitted by the non-display area 12.

[0112] However, in the low-frequency band below 1000 Hz, the sound emitted by the speaker 70 is larger than the sound emitted by the non-display area 12, and in the high-frequency band above 1000 Hz, the sound emitted by the non-display area 12 is larger than the sound emitted by the speaker 70. This results in that when the volume is increased, the change in the high-frequency sound is small, while the change in the low-frequency sound is large. As shown in curve D2, the volume of the superimposed high-frequency sound is lower than that of the low-frequency sound, and the clarity of the superimposed sound is poor.

[0113] Therefore, when the display device has a high volume, the third filter can be used to compensate for the high frequency band of the sound emitted by the speaker 70, so that the superimposed sound can still have a relatively flat frequency response curve as shown by curve D3.

[0114] In some embodiments, a detection element may be provided at the input or output of the third filter to detect the strength of the input signal of the exciter 30. When the strength of the input signal of the exciter 30 is greater than a preset value, the detection element may connect the output of the third filter to the input of the second filter to compensate the speaker 70. When the input signal strength detected by the detection element is less than a preset value, the detection element may disconnect the output of the third filter and the input of the second filter.

[0115] In some embodiments, the sound pressure level of the sound emitted from the non-display area 12 has an upper limit and is lower than the sound pressure level of the sound emitted from the speaker 70. The preset values ​​may be multiple, for example, including a first preset value and a second preset value. When the intensity of the input signal from the actuator 30 is the first preset value, the sound pressure level of the sound emitted from the non-display area 12 is at the upper limit. Therefore, when the intensity of the input signal from the actuator 30 is the first preset value, the speaker 70 has a first compensation amount, and when the intensity of the input signal from the actuator 30 is the second preset value, the speaker 70 has a second compensation amount, with the first compensation amount being lower than the second compensation amount.

[0116] In some embodiments, the above-mentioned preset value is dynamically changed, which is related to the intensity of the input signal of the exciter 30, etc., and this embodiment does not limit it.

[0117] As can be seen from the above embodiment, in the low-frequency band below 1000 Hz of the superimposed sound, the sound emitted by the speaker 70 is proportionally larger than the sound emitted by the non-display area 12. However, the human body is relatively insensitive to sound and image perception of sounds below 1000 Hz. Therefore, the speaker 70 can be placed at any position around the display screen 10. In some embodiments, there can be multiple speakers 70, and they can be placed on the ground side of the display screen 10.

[0118] Since the human body is relatively insensitive to the sound and image perception of sound produced by surface vibration, in some embodiments, the exciter 30 can also be set at any position around the display screen 10.

[0119] In some embodiments, see Figure 3 An actuator 30 can be located in the middle of the upper side of the display screen 10, serving as a center speaker 70, emitting the dialogue voice after being decoded by the decoder. An actuator 30 can be located on the left and right sides of the display screen 10 to widen the sound field of the superimposed sound and enhance the three-dimensional effect of the sound.

[0120] 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.

[0121] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicates that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0122] Finally, it should be noted that 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display device, characterized in that: include: A display screen, the display screen comprising a display area and a non-display area, the display area being used to display an image, and the non-display area being arranged outside the display area; a back plate, the back plate being fixedly connected to the non-display area; an exciter, the exciter comprising a vibrating member connected to the back plate, wherein vibration of the vibrating member can be transmitted to the back plate, thereby driving the non-display area to vibrate and generate sound through the back plate; The backplane comprises: a back panel body, the back panel body being fixedly connected to the non-display area; A vibration portion is provided at a position of the back panel corresponding to the non-display area, the vibration portion and the non-display area are not relatively fixed, the vibration portion is connected to the vibration member, the vibration portion can be deformed under the vibration of the vibration member and reciprocate relative to the back panel body; an elastic connection structure is provided between the vibration portion and the back panel body.

2. The display device according to claim 1, wherein A reinforcement portion is provided on the back plate, and the reinforcement portion passes through the back plate in the vertical direction of the back plate; Portions of the back plate located on both sides of the extending direction of the reinforcement portion constitute the vibration portion.

3. The display device according to claim 2, wherein: There are two reinforcement parts, which are arranged in parallel, and the parallel direction of the reinforcement parts is perpendicular to the extension direction of the reinforcement parts. The part of the back plate located between the two reinforcement parts constitutes the vibration part.

4. The display device according to claim 1, wherein The back plate includes a plurality of connecting parts, which are arranged at intervals along the circumference of the vibrating part, wherein a first end of each connecting part is connected to the vibrating part, and a second end of each connecting part is connected to the back plate body; The connecting portion can be turned over with the second end as a fulcrum under the drive of the vibrating portion.

5. The display device according to claim 4, wherein: The connecting portion is bent along its own length direction.

6. The display device according to claim 4, wherein: The back plate body is provided with an avoidance notch, and the vibration part and the plurality of connection parts are all accommodated in the avoidance notch.

7. The display device according to any one of claims 1 to 6, characterized in that: The exciter further comprises an exciter body, the vibrating member is connected to the exciter body and can reciprocate relative to the exciter body; The exciter body is fixedly connected to the back plate body.

8. The display device according to any one of claims 1 to 6, characterized in that: The display device further includes a buffer component, which is disposed between the vibration part and the non-display area and can be elastically deformed under the drive of the vibration part.

9. The display device according to any one of claims 1 to 6, characterized in that: There are multiple exciters, and the multiple exciters are arranged at intervals along the circumference of the display screen.

Images