CN111629309B - Display device - Google Patents

Abstract

The present invention provides a display device, comprising: the display device comprises a display panel, a backlight module, a back plate and a back shell, and further comprises a piezoelectric vibrator and a vibrating piece, wherein the piezoelectric vibrator is fixed on the vibrating piece, and the vibrating piece is fixed on the back plate; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the vibrating piece can be driven to bend, and then air vibration is driven to make sound. The display device has the characteristic of light weight and thinness.

Description

Display device

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

With the advancement of society and the development of scientific technology, the design of a television set tends to be lighter and thinner and intelligent, so that a speaker as an important part of the television set is also continuously developed in a lighter and thinner direction. A speaker is an energy converter for converting an electric signal into a sound signal, and is generally installed between a rear case and a rear panel of a television set, and emits a sound from the rear or side of the television set.

In general, an electrodynamic speaker is installed in a television, and it is known that a diaphragm structure of the electrodynamic speaker limits a thinning design, and in the prior art, a television screen and a television rear shell have been designed to be ultra-thin to the greatest extent, so that the thickness of the speaker or the thickness of a gap between the speaker and the television rear shell directly affects the overall thickness of the television, and therefore, if the speaker cannot realize the thinning design, the television is difficult to realize the thinning design.

Therefore, how to reduce the thickness of the speaker and further realize the light and thin television is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention provides a display device for solving the problem.

In a first aspect, the present invention provides a display device, including a display panel, a backlight module, a back plate, and a back case, where the display device further includes a piezoelectric vibrator and a vibrating member, the piezoelectric vibrator is fixed on the vibrating member, and the vibrating member is fixed on the back plate; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the vibrating piece can be driven to bend, and then air vibration is driven to make sound.

Optionally, the piezoelectric vibrator is a piezoelectric ceramic piece.

Optionally, the vibration member is a plate-shaped vibration member or a cavity vibration member.

Optionally, when the vibrating member is a cavity vibrating member, an opening is provided on a side surface of the vibrating member.

Optionally, the display device further includes a fixing bar fixed on the side of the vibrating member where the opening is provided.

Optionally, the opening is in the form of a partial opening or a full opening.

The invention provides a display device, which comprises a display panel, a backlight module, a back plate, a rear shell and a piezoelectric vibrator, wherein the piezoelectric vibrator is fixed on the inner side of the rear shell; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the rear shell can be driven to bend, and then air vibration sound is driven.

Optionally, the display device further includes a support arm surrounding the piezoelectric vibrator and fixed on the rear case.

Optionally, an opening is provided on the support arm.

In a third aspect, the present invention provides a display device, including a display panel, a backlight module, and a back plate, where the display device further includes a piezoelectric vibrator, and the piezoelectric vibrator is fixed on the back plate; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the back plate can be driven to bend, and then air vibration sound is driven.

In a fourth aspect, the present invention provides a display device, including a display panel, and a piezoelectric vibrator, where the piezoelectric vibrator is fixed on the display panel; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the display panel can be driven to bend, and then air vibration is driven to make sound.

In a fifth aspect, the present invention provides a display device, including a display panel, the display device further including a piezoelectric vibrator and a vibrating member, the piezoelectric vibrator being fixed to the vibrating member, the vibrating member being fixed to the display panel; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the vibrating piece can be driven to bend, and then air vibration is driven to make sound.

The display device provided by the invention adopts the piezoelectric vibrator as a driving unit, is similar to a voice coil in a traditional loudspeaker, is fixedly connected with the vibrating piece, and when an audio signal passes through the piezoelectric vibrator, the piezoelectric vibrator vibrates to drive the vibrating piece to vibrate, and the vibrating piece is equivalent to a cone-shaped cone in the traditional loudspeaker. Compared with the traditional loudspeaker, the piezoelectric vibrator has the characteristics of light weight and thinness, and the vibrating diaphragm does not use the cone-shaped cone any more, so that the whole sound generating device has the characteristics of thinning, and the display device has the characteristics of light weight and thinness.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description of the embodiments or the drawings used in the description of the prior art will be given in brief, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view of a television set with a stand-alone power panel

FIG. 2 is a schematic diagram of an acoustic device 1;

FIG. 3 is a schematic view showing the piezoelectric vibrator fixed to the outside of the cavity vibrating piece;

FIG. 4 is a schematic view of the piezoelectric vibrator fixed on the inner side of the cavity vibrating piece;

FIG. 5 is a schematic view of a piezoelectric vibrator mounted on a vibrating member in a forward direction;

FIG. 6 is a schematic view of a piezoelectric vibrator vertically fixed to a vibrating member;

FIG. 7 is a schematic view of an audio reproducing apparatus 2;

FIG. 8 is a schematic view of an audio reproducing apparatus 3;

FIG. 9 is a schematic view of a cavity vibrating member with a fixing strip at the open end;

FIG. 10 is a schematic view of an audio reproducing apparatus 4;

FIG. 11 is a front view of the acoustic device of FIG. 10 mounted on a backplate;

FIG. 12 is a schematic view of an audio reproducing apparatus 5;

FIG. 13 is a schematic view of the installation of the acoustic device shown in FIG. 12;

fig. 14 (a) is a rear view showing the acoustic device;

fig. 14 (b) is an exploded view of the sound emitting device;

FIG. 14 (c) is a schematic diagram of a television rear case in an audio device;

fig. 14 (d) is a side cross-sectional view of the sound emitting device;

FIG. 15 is a schematic view of a side opening design made in a support arm of a television rear shell;

FIG. 16 is a schematic view 7 of an audio reproducing apparatus;

FIG. 17 is a schematic view of an integrated molding of a fixing bar and a plate-like vibrating member;

FIG. 18 is a schematic view 8 of an audio reproducing apparatus;

FIG. 19 is an exploded view of the acoustic device shown in FIG. 18;

FIG. 20 is a schematic view of the mounting of the rear television housing and the back panel of the audio device of FIG. 18;

FIG. 21 is a rear view of the television set with the wall mount;

FIG. 22 is an oblique view of the television set when mounted on a wall;

FIG. 23 is a schematic view of an audio reproducing apparatus 9;

FIG. 24 is a schematic view of a rear television housing of the audio device of FIG. 23;

FIG. 25 is a schematic view of a vibration layer with three piezoelectric vibrators mounted thereon;

fig. 26 is a schematic diagram of a combined sound emitting device.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that terms such as "upper," "lower," "inner," "outer," "front," "rear," and the like, which indicate an orientation or a positional relationship, are based on the orientation or the positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, in which construction and operation are performed, and thus should not be construed as limiting the present invention.

Television sets are increasingly being designed for ultra-thin applications, and therefore, there are increasing demands on the volume, shape and performance of speakers they are equipped with. In general, the thickness of the whole machine is calculated as follows: complete machine thickness = screen thickness + speaker and television backshell clearance + backshell thickness.

The traditional speaker used in the television generally refers to a cone type speaker, a driving unit of the cone type speaker is a voice coil, the voice coil is placed in a magnetic gap formed by a magnetic conductive core column and a magnetic conductive plate, the voice coil and the cone are fixed together, after a sound current signal is introduced into the voice coil, the voice coil vibrates to drive the cone to vibrate, the cone radiates sound outwards, in order to ensure the audio characteristic of the speaker, the caliber of the cone in the speaker needs to be set larger, therefore, the parameter of the thickness of the speaker cannot be further thinned, the thickness of the whole television cannot be further thinned, and therefore, the traditional speaker used in the television cannot meet the requirements of the current television.

In view of the above problems, the present invention provides a new sound emitting device, which uses a piezoelectric vibrator as a driving unit, similar to a voice coil in a conventional speaker, where the piezoelectric vibrator is fixedly connected with a vibrating member, and when an audio signal passes through the piezoelectric vibrator, the piezoelectric vibrator vibrates to drive the vibrating member to vibrate, and the vibrating member is equivalent to a cone in the conventional speaker. Compared with the traditional loudspeaker, the piezoelectric vibrator has the characteristics of light weight and thinness, and the vibrating diaphragm does not use the cone-shaped cone any more, so that the whole sound generating device has the characteristics of thinning, and the television has the characteristics of light weight and thinness, and the structure is specifically described below.

Taking a television set provided with an independent power panel as an example, a structure of the television set will be described, fig. 1 is an exploded view of the television set provided with the independent power panel, and as shown in fig. 1, a television set 10 includes a display panel 11, a supporting member 12, a backlight module 13, a rear case 14, an audio device 15, a main board 16 and a power panel 17. Wherein the display panel 11 is used for presenting pictures to a user; the support 12 is used for fixing the television, and the support can be a base or a wall-hanging bracket; the backlight module 13 is located below the display panel 11, usually some optical components, and is used for providing enough brightness and uniformly distributed light sources to enable the display panel 11 to display images normally, the backlight module 13 further comprises a back plate 131, the sound emitting device 15, the main board 16 and the power board 17 are arranged on the back plate 131, usually some convex hull structures are formed by punching on the back plate 131, and the main board 16 and the power board 17 are fixed on the convex hull through screws or hooks; the television rear shell 14 is arranged on the display panel 11 in a covering way so as to hide parts of the television such as the backlight module 13, the sounding device 15, the main board 16, the power panel 17 and the like, thereby having an attractive effect; the sound emitting device 15 is a device for converting an electric signal into an acoustic signal for providing sound to a user.

Fig. 2 is a schematic view 1 of an acoustic device, and as shown in fig. 2, the acoustic device 15 includes a piezoelectric vibrator 151 and a vibrating member 152, where the piezoelectric vibrator 151 is fixedly connected to the vibrating member 152. The piezoelectric vibrator has the characteristics of small, thin and light, two copper electrodes are connected with a power supply through positive and negative leads, dielectric materials are filled in the two copper electrodes, and when an electric field is applied to the two electrodes, polarized dielectrics generate mechanical deformation or mechanical pressure in a certain direction; when the applied electric field is removed, these deformations or stresses are also removed.

Optionally, a specific structure of the piezoelectric vibrator is a piezoelectric ceramic plate, and the piezoelectric ceramic plate is an electronic sounding element, and a piezoelectric ceramic material is placed between two copper electrodes, and when an alternating current audio signal is connected to the two electrodes, the piezoelectric ceramic plate vibrates according to the frequency of the signal to generate corresponding sound.

The sound output principle of the sound output device is as follows: when an audio signal acts on the piezoelectric vibrator, the piezoelectric vibrator can mechanically deform due to the reason of the self material, and bends in different directions according to the different directions of the applied voltage, so that the vibrating piece fixedly connected with the piezoelectric vibrator is driven to bend and deform, the piezoelectric vibrator and the vibrating piece resonate, and air medium vibration is pushed to generate sound pressure, and sound is generated.

Wherein, the material of vibrating piece has certain influence to sound, mainly appears in the influence to formant. Formants, which are determinants of sound quality and are also important features reflecting vocal tract resonance characteristics, represent the most direct source of vocal tract information, and simply stated, formants refer to regions of relatively concentrated energy in the frequency spectrum of sound. When the value of the formants is high, human hearing easily perceives poor sound quality; when the value of the resonance peak is low, the sound intensity heard by the person is reduced, and therefore, the vibrating member needs to use a material having a medium internal loss to generate a suitable resonance peak, such as PP material or ABS material, or the like.

In this case, as shown in fig. 2, the hatched portion of the vibrator 152 connected to the piezoelectric vibrator 151 is called a vibration layer 156, and the vibration of the piezoelectric vibrator 151 is first transmitted to the vibration layer 156, and then the vibration layer 156 drives the entire vibrator 152 to vibrate, and sound is emitted mainly from the vibration layer 156.

Optionally, the piezoelectric vibrator 151 is adhered to and connected to the central area of the vibration layer 156, so as to better ensure consistency of vibration modes at two sides of the vibration layer, further improve the tone quality of the sound emitting device, and bring comfortable hearing enjoyment to the user. Of course, other placement positions of the piezoelectric vibrator may be selected, and the present invention is not limited thereto.

Optionally, the shape of the vibrating element in the sound emitting device is not unique, and may be a cuboid structure, a cube structure, other shapes, and the like. When the vibration member adopts a cuboid structure shown in fig. 2, specifically, the vibration member may be a solid flat plate structure or a hollow cavity structure. For convenience of description, the flat plate-shaped vibrating member will be referred to as a plate-shaped vibrating member and the cavity-shaped vibrating member will be referred to as a cavity vibrating member hereinafter.

For example, fig. 3 is a schematic view of the piezoelectric vibrator fixed on the outside of the cavity vibrating member, and the sound generating apparatus has a cavity vibrating member 1522 as shown in fig. 3. It is worth noting that compared with the vibrating pieces with two structures, the cavity vibrating piece is hollow, so that more air can be pushed to vibrate than the plate-shaped vibrating piece with the same specification, and the sound output effect of the sound output device is better.

Alternatively, in the case of the cavity vibrator 1522, the piezoelectric vibrator 151 may be attached to the outer surface of the vibrator 152, as shown in fig. 3, where the overall thickness of the sound emitting device 15 is the sum of the thickness of the piezoelectric vibrator 151 and the thickness of the cavity vibrator 1522; the piezoelectric vibrator 151 may be attached to the inner surface of the vibrator 152.

Fig. 4 is a schematic diagram of the piezoelectric vibrator fixed on the inner side of the cavity vibrating member, as shown in fig. 4, at this time, the overall thickness of the sound emitting device 15 is only the thickness of the cavity vibrating member 1522, compared with the thickness of the cavity vibrating member 152, when the piezoelectric vibrator 151 is adhered to the inner surface of the vibrating member 152, further thinning of the sound emitting device can be achieved, but care should be taken that perforations need to be provided on the cavity vibrating member 1522 for leading out positive and negative leads of the piezoelectric vibrator 151 connected to a power source.

Fig. 5 is a schematic view of the piezoelectric vibrator being fixed on the vibrating member in the forward direction, and fig. 6 is a schematic view of the piezoelectric vibrator being fixed on the vibrating member in the vertical direction. When the vibrating piece and the piezoelectric vibrator are of a cuboid structure, the direction of fixing the piezoelectric vibrator on the vibrating piece is various, wherein the forward fixing and the vertical fixing of the piezoelectric vibrator are in two typical fixing directions. When the long side of the piezoelectric vibrator 151 is in the same direction as the long side of the vibrator 152, this fixing direction is referred to as forward fixing for convenience of description (as shown in fig. 5). When the long side of the piezoelectric vibrator 151 is in the same direction as the short side of the vibrator 152, this fixing direction is referred to as vertical fixing (as shown in fig. 6). When the audio signal is applied to the piezoelectric vibrator, the direction of vibration of the piezoelectric vibrator is, as indicated by arrows in fig. 5 and 6, the longitudinal vibration of the long-side moving vibrator 152 of the piezoelectric vibrator 151 is fixed in the forward direction, and the short-side vibration of the long-side moving vibrator 152 of the piezoelectric vibrator 151 is fixed in the vertical direction. Notably, the vertical fixation may push more of the air medium into vibration than the two, resulting in a better quality sound of the acoustic device.

Fig. 7 is a schematic diagram 2 of an audio device, when a cavity vibrating member is adopted as a vibrating member of the audio device, an alternative solution is to make an opening design on a side surface of the cavity vibrating member 1522 (as shown in fig. 7), and the side opening makes air in the cavity participate in vibration to make sound, and the sound made by the side opening has a directional characteristic. Sound from the sound emitting device comes from the vibration layer 156 and the side opening 155 of the cavity vibrator 1522.

Optionally, the number of the side openings is not unique, and can be one or a plurality of, and the actual number of the openings is selected according to different specific requirements, so that the invention does not limit the number of the openings. However, it is notable that as the number of openings increases, the sound intensity decreases.

Alternatively, the side opening 155 of the cavity vibrator 1522 may be partially or completely open, as shown in the partially open configuration of fig. 7. Fig. 8 is a schematic view of an audio reproducing apparatus, as shown in fig. 8, which is a completely open structure. Notably, the full opening allows more air medium to travel than the partial opening, and thus the sound is stronger and more directional.

Considering that the side opening may have a phenomenon that vibration modes at both sides of the vibration layer are inconsistent due to lack of support at one end of the side opening, in order to prevent such a phenomenon, a fixing bar may be provided at one end of the side opening, and the fixing bar is fixedly connected with the vibration layer.

For example, fig. 9 is a schematic view of the cavity vibration member side opening end with a fixing strip, and as shown in fig. 9, the fixing strip 153 is provided on the outer surface of the vibration layer 156. The fixing strip 153 can enhance stability of a portion of the vibration layer 156 near the opening side when the vibration layer 156 vibrates, preventing a priming phenomenon from occurring.

In addition, there are various mounting positions of the fixing strip 153, that is, the fixing strip 153 may be disposed on the inner surface of the vibration layer 156 or on the outer surface of the vibration layer 156. The number of the fixing bars 153 is not limited, and may be one or more. For example, fixing strips 153 are provided on both inner and outer surfaces of the vibration layer 156. When the fixing strips 153 are arranged on two sides of the vibration layer 156 at one end of the side opening 155, the fixing strips on two sides can better limit abnormal vibration of the vibration layer, so that consistency of vibration modes with one end which is not opened is better ensured, sound quality of a sound emitting device is improved, and comfortable hearing experience is brought to a user. The fixing strip 153 and the cavity vibration member 1522 may be integrally formed, or may be adhered. The fixing strip and the cavity vibration member 1522 may be made of the same material, or may be made of different materials, such as aluminum or other metal materials with higher hardness.

Fig. 10 is a schematic view of an acoustic device, as shown in fig. 10, in which fig. 10 (a) shows an orthographic view of the acoustic device and fig. 10 (b) shows a rear oblique view of the acoustic device. When the cavity vibration member 1522 is used as the vibration member of the sound emitting device, for convenience of description, the opposite surface of the vibration layer 156 is referred to as the bottom layer 157, and an alternative solution is to provide the sound outlet 154 on the bottom layer 157.

The size of the area of the sound outlet 154 affects the frequency response, i.e., the smaller the area of the sound outlet 154, the higher the bass portion component of the sound it emits; the larger the area of the sound outlet 154, the higher the component of the treble portion of the sound emitted therefrom. Therefore, in practical design, the open space of the sound outlet 154 is reasonably designed according to the requirement, so as to ensure the sound quality.

Alternatively, the number and shape of the sound outlets 154 are not particularly limited, and may be selected according to actual specific requirements.

When any one of the sound emitting devices is installed, a proper installation position can be selected according to the specific structural characteristics of the sound emitting device. For example, the sound emitting device shown in fig. 2, optionally, the sound emitting device is symmetrically installed between the back plate and the rear television shell, wherein the vibration layer is attached to one side of the rear television shell, so that the hearing effect of the user on the left and right sides can be improved. For example, in the sound emitting device shown in fig. 7, optionally, a side sound outlet of the sound emitting device is arranged on a side surface close to the television during installation, so as to ensure better directivity of sound, and bring good hearing effect to users. For example, the sound emitting device shown in fig. 10 may be optionally installed with the sound emitting opening exposed to ensure better forward and backward transmission of sound, and an exemplary installation method is shown in fig. 11 to 14.

Fig. 11 is a front view of the sound device shown in fig. 10 mounted on the back plate, and as shown in fig. 11, the sound outlet 154 of the sound device is disposed to be exposed below the back plate 131, which is not perceived by a user in normal circumstances, so that the overall aesthetic appearance of the television set can be improved.

Fig. 12 is a schematic diagram 5 of a sound emitting device, as shown in fig. 12, in which a certain inclination design is made on a shadow surface 158 in the figure, and the inclination angle of the shadow surface 158 is adjusted to control the sound emitting specific gravity of a sound outlet in the whole volume. Wherein, the range of the inclination angle is [0,90], when the inclination angle is 0 degree, the sound field range of the sound emitting device is wider, but the reflection is more; when the inclination angle is 90 degrees, the sound field range of the sound emitting device is relatively narrow. Therefore, in practice, the inclination angle can be selected in a compromise manner according to specific requirements, so as to ensure that the sound field range and the sound quality of the television can be considered at the same time.

Fig. 13 is a schematic view showing the installation of the acoustic device shown in fig. 12, wherein a portion a in fig. 13 shows a side view of a beveled back plate, and a portion b in fig. 13 shows a front view of the acoustic device shown in fig. 12 installed on the back plate shown at a portion a in fig. 13. In order to further improve the aesthetic appearance of the whole tv set when the sound emitting apparatus having a certain inclination angle as shown in fig. 12 is installed, the bottom end of the tv backplate 131 may be designed in a beveled shape, and a side view of the beveled backplate 131 is shown as a portion a in fig. 13. When the sound emitting device is mounted on the bevel-shaped backboard shown in the part a in fig. 13, as shown in the part b in fig. 13, the sound emitting device 15 is completely hidden, so that the television has more attractive appearance on the basis of good sound quality, and comfortable visual enjoyment is brought to users.

Optionally, any of the above-mentioned sound emitting devices may be further mounted on an inner surface of the display screen, so that the generated sound may be transmitted to the screen and transmitted to the human ear through the screen, thereby providing the user with an immersive sensation.

Alternatively, in the display device without a rear case, any one of the above-mentioned sound emitting devices may be mounted on the inner side of the back plate, and the sound emitted from the sound emitting device may be transmitted to the back plate, thereby being transmitted to the human ear.

The cavity of the cavity vibrating piece of any one of the above-mentioned sound emitting devices is formed separately, and a cavity structure formed by combination is introduced below, specifically, the cavity is formed by the back plate, the television rear shell and the plate-shaped vibrating piece together.

Fig. 14 (a) is a rear view showing the sound emitting device, fig. 14 (b) is an exploded view of the sound emitting device, fig. 14 (c) is a schematic view of a television rear case in the sound emitting device, and fig. 14 (d) is a side sectional view of the sound emitting device. As can be seen from fig. 14 (a) and 14 (b), the sound emitting device 15 includes: a cavity and a piezoelectric vibrator (not shown in the figure) combined by the back plate 131, the tv rear case 14, and the plate-like vibrator 1521.

The specific structure of the television rear casing 14 is shown in fig. 14 (c), that is, a partial "hollowed-out" design is made in the television rear casing 14, and a supporting arm 142 is enclosed at the edge of the hollowed-out area 141. Alternatively, the support arm 142 may be integrally formed with the television rear housing 14 as shown in fig. 14 (c), or may be removably attached.

As shown in fig. 14 (d), the plate-shaped vibrator 1521 is covered at the opening of the hollowed-out area 141, and when the tv rear case 14 is assembled on the tv back plate 131, the plate-shaped vibrator 1521, the support arm 142 and the tv back plate 131 together form a closed cavity, the cavity and the piezoelectric vibrator 151 fixed on the plate-shaped vibrator 1521 together form the sound generating device 15, and the sound of the sound generating device 15 is mainly generated by the plate-shaped vibrator 1521. The plate-like vibrator 1521 may be attached to the hollowed-out area 141 by adhesive or may be screwed.

Optionally, referring to fig. 14 (d), a sealing portion 18 may be added between the support arm 142 and the tv backplate 131 to enhance the sealing performance of the cavity formed by the plate-shaped vibrator 1521, the support arm 142 and the tv backplate 131, so that the sound emitting device has better sound emitting effect. Wherein, the sealing part 18 can be made of foam material, or other elastic materials such as rubber pad,

alternatively, the tv housing 14 may be partially made of the same material as the plate-shaped vibrator 1521, for example, the material of the support arm 142 in the tv housing 14 is changed to the same material as the plate-shaped vibrator 1521, so that the sound generating device has better sound quality.

Fig. 15 is a schematic diagram of a design of a side opening on a support arm of a television rear shell, and a design of a side opening on a support arm 142, as shown in fig. 15, is shown, wherein the design of the side opening 143 can enhance the directivity of the sound emitting device. Alternatively, the number of the side openings 143 and the opening form are not unique, and may be selected according to actual needs.

Fig. 16 is a schematic diagram 7 of an audio device, as shown in fig. 16, when an opening design can be made on a plate-shaped vibrating member 1521, considering that the vibration frequency may be too fast at one end of the opening and the vibration mode is inconsistent with that of the non-opened end, a fixing strip 153 may be disposed at the opened end of the plate-shaped vibrating member 1521 to limit the degree of freedom of the vibration at the opened end, so as to reduce the occurrence of harmonics, and make the audio effect of the audio device better.

Fig. 17 is a schematic view of the integral molding of the fixing strip and the plate-shaped vibration member, and alternatively, the plate-shaped vibration member 1521 and the fixing strip 153 may be integrally formed as shown in fig. 17, or may be detachably connected. The fixing strip 153 may be disposed at various positions, and reference is made to the foregoing, which will not be repeated here. In addition, the material selection of the fixing strip 153 may refer to the above description, and will not be described herein. The sound emitting device formed by the chamber combined by the back plate 131, the tv rear case 14 and the plate-shaped vibrator 1521 is installed in a similar manner to the former chamber which is formed separately, and will not be described again.

The combined cavity structure has the characteristic of further thinning the television, and according to the prior art, the thickness of the whole machine is calculated as follows: the thickness of the whole television is equal to the thickness of a screen, the thickness of a loudspeaker, the gap between the loudspeaker and the television rear shell and the thickness of the rear shell, and on the basis that the parameter of the thickness of the loudspeaker is thinned, the thickness of the parameter of the gap between the loudspeaker and the television rear shell is eliminated by adopting a combined cavity structure, so that the whole television is lighter and thinner, and the development trend of the current television is complied with.

Any of the above-mentioned sound emitting devices, whether a cavity vibrating member or a plate-like vibrating member is used therein, is a structure independent of the rear casing of the television. The following will describe a sound emitting device, the vibrating member of which is the rear casing of the whole television, specifically as follows:

fig. 18 is a schematic view of an acoustic device 8, and fig. 19 is an exploded view of the acoustic device shown in fig. 18. As shown in fig. 18 and 19, the television rear case 14 and the television back plate 131 form a chamber, and the piezoelectric vibrator 151 and the chamber form the sound emitting device 15 in order to ensure the overall aesthetic property of the television, the piezoelectric vibrator 151 is fixedly connected to the inner surface of the television rear case 14. The vibration layer of the sound emitting device 15 is the whole television rear shell 14, and the sound of the sound emitting device 15 is mainly emitted by the television rear shell 14. Optionally, when the television rear casing 14 has the heat dissipation hole 144, the sound of the sound emitting device 15 may also be emitted from the heat dissipation hole 144.

Fig. 20 is a schematic view of the installation of the rear television housing and the back panel of the acoustic device of fig. 18. Alternatively, when assembling the television rear shell and the back plate, as shown in fig. 20, the mounting positions of the screws 145 are distributed around the television rear shell 14 to reduce the influence on the vibration of the television rear shell.

Optionally, the rear shell of the television may be made of a material similar to that of the vibrating member, so that the sound generating device has better sound quality.

In the scheme, the whole television rear shell is adopted as the vibrating layer of the sound emitting device, and the radiating holes are used for emitting sound with directivity, so that the structural design of the whole television is simplified, and the stability and reliability of the whole television are improved.

Alternatively, fig. 21 is a rear view of the television set at the time of wall-mounting, and fig. 22 is an oblique view of the television set at the time of wall-mounting. In general, in order to save space, the television may be installed by hanging the television on a wall, as shown in fig. 21 and 22, where the television is installed by hanging the television on a wall: the struts 146 of the fixing member 12 are required to be close to the upper and lower ends of the television rear shell 14 so as to reduce the influence on the television rear shell during vibration;

optionally, the mount 12 is spaced at least 1cm from the television rear housing 14 to ensure better sound emission from the sound emitting device. The middle of the fixing member 12 is designed with an opening to reduce the overall area of the fixing member 12 and increase the effect of sound radiation rearward.

Fig. 23 is a schematic diagram 9 of an audio device, fig. 24 is a schematic diagram of a television rear shell in the audio device shown in fig. 23, and after the television rear shell 14 is fixed to the back plate 131 as shown in fig. 23 and 24, a cavity is formed by partially recessing the side surface of the television rear shell 14, and a piezoelectric vibrator 151 is fixedly connected to a shadow area 145 in fig. 24, where the cavity and the piezoelectric vibrator 151 form the audio device 15. In this version, the shaded area 145 and the entire television rear housing 14 are the vibrating layer of the sound emitting device 15, the sound of which comes not only from the vibrating layer but also from the side opening 149 of the chamber. When the sound emitting device is installed in a wall-mounted mode, attention is paid to avoiding the position of the cavity.

The television rear shell is provided with the sound emitting device formed by the concave design, so that the structure of the television is simplified, and the side sound emitting of the television is better realized because the television rear shell is directly provided with the side opening.

The piezoelectric vibrators can be fixed on the vibration layer by any one of the sounding devices, and the piezoelectric vibrators are matched with each other to work by controlling the relative voltage distributed by the piezoelectric vibrators so as to ensure the consistency of vibration modes at different positions of the vibration layer, so that the sounding device has a better bass effect.

Fig. 25 is a schematic diagram of the vibration layer with three piezoelectric vibrators 151 symmetrically mounted thereon, as shown in fig. 25, so as to reduce harmonic distortion of the sound emitting device, better ensure consistency of vibration modes at each position of the vibration layer 156, and make sound emitted by the television have better low-frequency characteristics.

Optionally, the positions of the plurality of lamination vibrators fixedly connected to the vibration layer are various, which are the same as those of the case of fixing a single piezoelectric vibrator, and specific reference may be made to the foregoing description, and details thereof will not be repeated herein. The user can organically combine any one of the sound emitting devices according to different requirements so as to realize the effect of surrounding multiple channels of the television.

For example, fig. 26 is a schematic diagram of a combined sound emitting device, as shown in fig. 26, a television may be designed with three sound emitting devices, two sound emitting devices being disposed on the left and right sides of the television, respectively, being a sound emitting device 210 and a sound emitting device 220, for use as the left channel and the right channel of the television, and a third sound emitting device 230 being disposed at a lower middle position of the television, for use as the bass channel of the television.

Alternatively, the sound emitting device 210 and the sound emitting device 220 may employ the sound emitting device structure shown in fig. 10 to ensure that the sound emitting device 210 and the sound emitting device 220 can emit clear sounds. However, when the sound emitting device 230 may adopt the structure of the sound emitting device shown in fig. 2, the sound emitting device has no obvious directivity to sound, so the sound emitting device 230 may be placed on the uppermost surface of the back plate, or may be placed in a middle position of the back plate, which may be determined according to the structural design of the back plate.

Optionally, the invention also provides a display device, which comprises a display panel, a backlight module and a back plate, wherein the display device also comprises a piezoelectric vibrator, and the piezoelectric vibrator is fixed on the back plate; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the back plate can be driven to bend, and then air vibration sound is driven.

Specifically, the back plate can be used as a vibrating piece, particularly in a display device without a back shell design, the piezoelectric vibrator is attached to the back plate, and after the piezoelectric vibrator is electrified, mechanical deformation can occur, so that the back plate is driven to vibrate. The vibration of the backboard can drive the surrounding air to vibrate, so that sound is generated. In this way, the thickness is reduced further than in a display device with a conventional loudspeaker.

Optionally, the invention further provides a display device, which comprises a display panel piezoelectric vibrator, wherein the piezoelectric vibrator is fixed on the display panel; the piezoelectric vibrator can bend under the action of voltage, and bends in different directions can be generated under the voltages in different directions; when the piezoelectric vibrator is bent, the display panel can be driven to bend, and then air vibration is driven to make sound.

Specifically, the display panel can be used as a vibrating piece, the piezoelectric vibrator is attached to the back plate, and after the piezoelectric vibrator is electrified, mechanical deformation can occur, so that the display panel is driven to vibrate. The vibration of the display panel can drive surrounding air to vibrate, so that sound is generated. And, the sound that screen vibration sent directly transmits to the user, can give the user and take one's life's sound sense effect. In addition, in this way, the thickness is further reduced than in a display device with a conventional speaker.

The electronic device provided in this embodiment may be used to execute the printing method, and its implementation manner and technical effects are similar, and this embodiment is not repeated here.

The present invention also provides a computer-readable storage medium including a computer program for implementing the printing method in the above embodiment.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, e.g., the division of modules is merely a logical function division, and there may be additional divisions of actual implementation, e.g., multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules illustrated as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The units formed by the modules can be realized in a form of hardware or a form of hardware and software functional units.

The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some steps of the methods of the embodiments of the present application.

It should be understood that the above processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.

The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or one type of bus.

The computer-readable storage medium described above may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (5)

1. A display device, comprising:

a display panel;

the backlight module is positioned below the display panel and comprises a back plate;

a vibrating member provided on the back plate;

the piezoelectric vibrator is arranged on the vibration layer of the vibration piece, can bend under the action of voltage, can generate bending in different directions under the voltage in different directions, and can drive the vibration piece to bend when the piezoelectric vibrator bends so as to drive air outside the vibration piece to vibrate to emit first sound;

the vibrating piece is of a hollow cavity structure with an opening, when the vibrating piece vibrates, air in the cavity is driven to vibrate, second sound is emitted from the opening, and the directivity of the first sound is different from that of the second sound;

the fixing strip is arranged on the side of the vibrating piece, which is provided with the opening, and can enhance the stability of the part of the vibrating layer, which is close to the opening side, when the vibrating layer vibrates, so as to prevent the bottoming phenomenon;

the vibrating member further includes: a bottom layer opposite to the vibration layer, the opening being located on the bottom layer, the first sound and the second sound being in opposite directions;

the opening further comprises two parts, one part is positioned between the vibration layer and the bottom layer, the other part is positioned on the bottom layer, the plane where the opening is positioned and the plane where the vibration layer is positioned form an inclined angle, the inclined angle is an acute angle, and the plane where the vibration layer is positioned and the plane where the bottom layer is positioned are parallel.

2. The display device according to claim 1, wherein fixing bars are provided on both inner and outer surfaces of the vibration layer to limit abnormal vibration of the vibration layer.

3. The display device according to claim 1, further comprising:

and the rear shell is covered on the back plate, the vibrating piece is positioned in a space formed by the rear shell and the back plate, and the opening is exposed from the lower part of the back plate.

4. The display device according to claim 1, wherein the opening is in the form of a partial opening or a full opening.

5. A display device, comprising:

a display panel;

the backlight module is positioned below the display panel;

the back shell covers the backlight module;

a vibrating member provided on the rear case;

the piezoelectric vibrator is arranged on the vibration layer of the vibration piece, can bend under the action of voltage, can generate bending in different directions under the voltage in different directions, and can drive the vibration piece to bend when the piezoelectric vibrator bends so as to drive air outside the vibration piece to vibrate to emit first sound;

the vibrating piece is of a hollow cavity structure with an opening, when the vibrating piece vibrates, air in the cavity is driven to vibrate, second sound is emitted from the opening, and the first sound and the second sound are different in directivity;

the fixing strip is arranged on the side of the vibrating piece, which is provided with the opening, and can enhance the stability of the part of the vibrating layer, which is close to the opening side, when the vibrating layer vibrates, so as to prevent the bottoming phenomenon;

the vibrating member further includes: a bottom layer opposite to the vibration layer, the opening being located on the bottom layer, the first sound and the second sound being in opposite directions;

the opening further comprises two parts, one part is positioned between the vibration layer and the bottom layer, the other part is positioned on the bottom layer, the plane where the opening is positioned and the plane where the vibration layer is positioned form an inclined angle, the inclined angle is an acute angle, and the plane where the vibration layer is positioned and the plane where the bottom layer is positioned are parallel.

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