CN215599494U - Screen vibrator and screen vibration system - Google Patents

Screen vibrator and screen vibration system Download PDF

Info

Publication number
CN215599494U
CN215599494U CN202122053584.7U CN202122053584U CN215599494U CN 215599494 U CN215599494 U CN 215599494U CN 202122053584 U CN202122053584 U CN 202122053584U CN 215599494 U CN215599494 U CN 215599494U
Authority
CN
China
Prior art keywords
screen
spring
vibrator
driving
magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202122053584.7U
Other languages
Chinese (zh)
Inventor
李艳龙
周争喜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Timewaying Technology Co ltd
Original Assignee
Shenzhen Timewaying Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Timewaying Technology Co ltd filed Critical Shenzhen Timewaying Technology Co ltd
Priority to CN202122053584.7U priority Critical patent/CN215599494U/en
Application granted granted Critical
Publication of CN215599494U publication Critical patent/CN215599494U/en
Priority to PCT/CN2022/086125 priority patent/WO2023024528A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

The utility model is suitable for the technical field of laser projection, and provides a screen vibrator which is used for being attached to the back of a screen and has the integral natural frequency f0Said f0Between 5 and 200 Hz; the screen vibrator comprises an exciting coil, a magnet and a spring; the exciting coil can generate electromagnetic force when being driven; the magnet is fixedly connected with the spring, and the magnet can vibrate under the influence of the electromagnetic forceThe springs are driven to resonate together, and vibration waves are conducted to the screen by the springs. The screen vibrator provided by the utility model has the advantages of simple structure, low cost, high vibration intensity, no obvious noise, long service life and the like, and can effectively solve the problems of short service life and high cost of the vibrator for eliminating speckles in the existing laser projection industry.

Description

Screen vibrator and screen vibration system
Technical Field
The utility model belongs to the technical field of laser projection, and particularly relates to a screen vibrator and a screen vibration system.
Background
The application of laser as a light source in the projection display industry has become a future trend, and the laser light source starts to gradually replace the original projection light sources such as mercury lamps and xenon lamps with the advantages of high electro-optic conversion efficiency, high color saturation, wide color gamut and the like. However, since laser itself has strong monochromaticity and is easy to emit and interfere, laser projection generally has a relatively serious speckle problem, so that the image graininess is obvious and the image quality is reduced.
It is common practice in the laser projection display industry to eliminate speckle by vibrating a screen, for example, there are techniques for eliminating speckle by vibrating the screen with a vibration motor, and there are also methods for vibrating the screen by using a low frequency speaker.
For the technology of the vibrating motor, a miniature direct current motor is generally adopted in the industry to drive an eccentric wheel to generate vibration, but the direct current motor is mostly a brush motor, and after long-time running, a carbon brush is seriously abraded, so that the motor is in failure, and the continuous service life of the vibrator is generally 300-500 hours, and the use requirement of cinema showing cannot be met. And to the above-mentioned vibration mode that adopts the low frequency audio amplifier, drive the cone by the audio amplifier voice coil loudspeaker voice coil and produce the vibration, use the sponge and carry out soft contact with the screen in cone the place ahead, promote the screen and produce the vibration. The low frequency sound box vibration scheme needs to strictly control the distance between the sound box and the screen, and the sound box needs to be firmly fixed on the screen frame, so that the cost and the construction difficulty are not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a screen vibrator which is easy to construct, long in service life and low in cost.
In order to solve the above technical problems, in a first aspect, the present invention provides a screen vibrator for attaching to a back surface of a screen, the screen vibrator having an overall natural frequency f0Said f0Between 5 and 200 Hz; the screen vibrator comprises an exciting coil, a magnet and a spring; the exciting coil can generate electromagnetic force when being driven; the magnet is fixedly connected with the spring, and the magnet is arranged onThe spring can be driven to resonate together when the screen vibrates under the influence of the electromagnetic force, and the spring transmits vibration waves to the screen.
Further, the screen vibrator also comprises a driving circuit electrically connected with the exciting coil.
Further, the driving frequency of the driving signal output by the driving circuit is foutSaid foutIs not equal to f0And f is0-20Hz≤fout≤f0+20Hz。
Furthermore, the screen vibrator also comprises a shell, and the shell is used for being attached to the screen; the exciting coil, the magnet and the spring are arranged in the shell, the first end of the spring is fixedly connected with the magnet, and the second end of the spring is connected to the inner wall of the shell.
Further, a base is arranged in the shell; the base is provided with a coil mounting groove, the coil mounting groove is internally provided with the exciting coil, and the base is also provided with a spring fixing column; the magnet is positioned in the exciting coil, and the exciting coil and the magnet are separated and coaxial; the second end of the spring is connected to the spring fixing column, and connection with the inner wall of the shell is achieved.
Further, the waveform of the driving signal output by the driving circuit is an alternating current wave.
Further, the alternating current wave is one of a sine wave, an alternating current triangular wave, an alternating current sawtooth wave and an alternating current square wave.
Further, the waveform of the driving signal output by the driving circuit is one of a direct current half sine wave and a direct current square wave.
Further, the spring is one of a flat spring plate, a spiral spring, a steel wire, a tower spring, a spiral spring and a disc spring.
Further, the frequency of the driving signal output by the driving circuit is 50Hz, and the voltage range is greater than 0 and less than or equal to 36V.
In a second aspect, the present invention also provides a screen vibrating system, comprising:
a plurality of screen vibrators as described in the first aspect, each screen vibrator attached to the back face of the screen at an overall natural frequency.
Further, at least two different overall natural frequencies are provided in the plurality of screen vibrators; the screen vibration system also comprises a plurality of driving circuits, and driving signals output by the driving circuits at least have two different driving frequencies, wherein each driving frequency corresponds to each integral natural frequency one to one; each driving circuit is electrically connected with the corresponding screen vibrator with the integral natural frequency and used for driving the corresponding screen vibrator.
Further, the driving frequency and/or the voltage amplitude of the driving signal output by each driving circuit are changed within a preset change range.
The screen vibrator provided by the utility model is attached to the back of the screen, the exciting coil in the screen vibrator can generate electromagnetic force when being driven, the magnet can drive the spring to resonate together under the action of the electromagnetic force, and the spring can conduct vibration waves to the screen to vibrate together, so that the effect of eliminating speckles is realized.
Drawings
FIG. 1 is a block diagram of a screen vibrator according to a first embodiment of the present invention;
fig. 2 is a view showing a model example of a helical coil spring according to a first embodiment of the present invention;
fig. 3 is a diagram illustrating a model example of a sheet-like dome according to a first embodiment of the present invention;
fig. 4 is a model example structure view of a simple strut spring provided in the first embodiment of the present invention.
FIG. 5 is a schematic view of an ideal screen vibrator provided in accordance with a first embodiment of the present invention;
FIGS. 6A and 6B are vibration waveform diagrams of simple harmonic vibration and damped vibration, respectively, of the screen vibrator of FIG. 5;
FIG. 7 is a schematic diagram illustrating the variation of the amplitude and the resonant frequency of the screen vibrator when the screen vibrator is subjected to periodic external forces of different frequencies according to the first embodiment of the present invention;
FIGS. 8A and 8B are waveform diagrams of driving signals in the form of an AC sine wave and an AC square wave, respectively, as provided by the first embodiment of the present invention;
FIGS. 8C and 8D are waveform diagrams of driving signals in the form of a DC half sine wave and a DC square wave, respectively, as provided by the first embodiment of the present invention;
FIG. 9 is a schematic view of a screen vibrating system for forming a standing wave on a screen according to a second embodiment of the present invention;
FIG. 10 is a block schematic diagram of a screen vibrating system provided in accordance with a second embodiment of the present invention;
fig. 11 is a schematic view of the mounting of a screen vibrator on the back of a screen according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, the screen vibrator according to the first embodiment of the present invention is attached to the back of the screen when in use, and the natural frequency of the screen vibrator is f0. Specifically, the screen vibrator includes an excitation coil 1a, a magnet 1b, and a spring 1c, wherein the excitation coil 1a generates an electromagnetic force when driven, and the electromagnetic force generated by the excitation coil 1a can be preferably greater than the self-resilient force of the spring 1 c.
The magnet 1b is fixedly connected with the spring 1c, and the magnet 1b can drive the spring 1c to resonate together when being influenced by magnetic force and vibrate, and the spring 1c conducts vibration waves to the screen to form damping resonance.
The magnet 1b is preferably a permanent magnet, but may be a non-permanent magnet, and it is possible to charge the magnet periodically.
The spring 1c may be one of a flat plate spring, a spiral spring, a steel wire, a tower spring, a spiral spring, and a disc spring. Fig. 2 shows a model example structure of a tower-shaped coil spring, fig. 3 shows a model example structure of a sheet-shaped spring plate, and fig. 4 shows a model example structure of a simple strut spring, and in practical application, the size, fatigue strength, amplitude and the like are adjusted by selecting an appropriate spring structure type according to practical situations, which all belong to the scope of the utility model.
According to the vibration principle, the vibrating object emits sound, commonly referred to as a sound source, and likewise, the screen vibrates to emit sound. The frequency range of sound which can be heard by human ears is 20 Hz-20 KHz, the sound with the frequency higher than 20KHz is called ultrasonic wave, and the sound with the frequency lower than 20Hz is called infrasonic wave. The frequency range which is most sensitive to human ears is 1K-3 KHz, and the human ears are less sensitive to sound below 200 Hz. In the present invention, the whole natural frequency f of the whole screen vibrator0Controlled between 5-200 Hz, preferably f0The frequency is 10-60 Hz, so that the noise which can be identified by human ears and is generated by the vibration of the screen is weakened.
By "overall natural frequency," it is meant the frequency at which the entire screen vibrator (including the excitation coil, magnets, springs, and associated mounting hardware) can resonate with the vibration source when vibrated by external excitation. The method can be specifically obtained by the following steps: the screen vibrator is suspended, a certain small alternating voltage, such as 0.1V, is fixed, then the frequency of the alternating current is adjusted, when the frequency is adjusted to a certain frequency range, the screen vibrator vibrates violently, even a spring is broken, and the frequency of the alternating current at the moment can be used as the integral natural frequency of the screen vibrator.
The magnet 1b, the spring 1c and the housing 1d function as a vibrator, and the overall natural frequency of the screen vibrator is the overall natural frequency of the overall structure of the vibrator consisting of the magnet 1b, the spring 1c and the housing 1 d.
The principle of the screen vibrator is that the screen vibrator is composed of a spring and a vibrator, an ideal type schematic diagram of the screen vibrator is shown in fig. 5, and when the vibrator vibrates freely, the displacement of the vibrator changes according to a sine rule along with time, which is called simple harmonic vibration. The amplitude and initial phase of the simple harmonic vibration are related to the initial conditions of the vibration, and the period or frequency of the vibration is related to the intrinsic characteristics of the system, namely the overall intrinsic frequency or the intrinsic period, regardless of the initial conditions. The overall natural frequency is independent of external excitation and is a natural property of the structure, as shown in fig. 6A. When the vibration system is damped, its vibration amplitude gradually weakens until stopping the vibration when no external continuous power is supplied, which is called damped vibration, as shown in fig. 6B. The overall natural frequency of the structure is present regardless of whether the structure is excited or not by the outside world.
The vibration system shown in fig. 5 has its entire natural frequency f without considering the mass of the spring itself and the frictional force0Is determined by the following formula:
Figure DEST_PATH_GDA0003406181360000051
wherein k is the stiffness coefficient of the spring, and m is the mass of the vibrator. Therefore, the stiffness coefficient of the system and the mass of the vibrator can be adjusted, and the natural frequency f of the whole system can be adjusted0The size of (2). The spring stiffness coefficient k is related to the elastic modulus, shape, length, cross-sectional area, number of turns and the like of the spring material, and the stiffness coefficient k of the spring can be changed by adjusting the parameters.
When there is an excitation from the outside, resonance will occur when the outside excitation frequency is equal to or very close to the overall natural frequency of the structure. In a mechanical system, resonance refers to a phenomenon that when the frequency of a mechanical oscillation system under the action of a periodic external force is the same as or very close to the overall natural frequency of the system, the amplitude of the system is increased significantly. The frequency at which resonance occurs is called the resonance frequency, and the energy efficiency of external force input to the mechanical oscillation system is maximized. The work of external force input into the oscillating system at resonance is balanced with the work dissipated by the damping, and the shape of the formants is closely related to the damping, as shown in fig. 7. Resonance is generally detrimental and can cause significant mechanical and structural deformations and dynamic stresses, even destructive accidents. However, a vibration machine based on the resonance principle can be used, and certain processes such as a resonance screen and the like can be completed with lower power.
In this embodiment, when the screen vibrator is attached to the rear surface of the screen, the screen generates resistance against the screen vibrator, and when the screen vibrator vibrates, a damped resonance is formed, and the resonance frequency at this time is slightly different from the entire natural frequency of the screen vibrator itself, as shown in fig. 7.
The present embodiment utilizes the resonance principle, and applies a periodic external force to the magnet 1b by driving the exciting coil 1a, so that the magnet 1b (including the fitting for fixing the magnet 1 b) and the spring 1c operate at the whole natural frequency f0And thereby resonance is generated, and the maximum vibration amplitude is obtained. When the shell of the screen vibrator is pasted on the back of the screen, the screen is driven to vibrate, and therefore speckles projected by laser are effectively removed.
To protect the exciting coil 1a, the magnet 1b and the spring 1c, a housing for attaching the entire screen vibrator to the screen may be further designed. The exciting coil 1a, the magnet 1b and the spring 1c are disposed in the housing, a first end of the spring 1c is fixedly connected with the magnet 1b (for example, fixedly connected by a screw), and a second end of the spring 1c is connected to an inner wall of the housing, so that the vibration wave can be conducted to the screen through the housing.
Further, a base 1d is further built in the housing, a coil mounting groove 1e is provided on the base 1d, and an excitation coil 1a is mounted in the coil mounting groove 1 e. The base 1d is also provided with a spring fixing column 1 f.
The magnet 1b is located within the excitation coil 1a, and the excitation coil 1a and the magnet 1b are separated and coaxial. The first end of spring 1c and magnet 1b fixed connection, the second end of spring 1c is connected on spring fixed column 1f, realizes being connected with casing 1d inner wall.
Further, the screen vibrator further comprises a driving circuit electrically connected with the exciting coil 1a, and the driving frequency of the driving signal output by the driving circuit changes within the preset change range of the corresponding overall natural frequency. Specifically, the driving frequency of the driving signal outputted by the driving circuit is foutTo avoid the damage of the screen vibrator due to the generation of severe resonance, foutIs not equal to f0And f is0-20Hz≤fout≤f0+20Hz, for example, can be designed as the drive frequency foutIs 50Hz and the overall natural frequency f0Between 55-60Hz, so that a powerful vibration effect can be obtained without damaging the vibrator.
Further, the voltage of the driving signal output by the driving circuit is changed within a preset change range of the rated voltage of the driving circuit. Specifically, the voltage of the driving signal output by the driving circuit varies within ± 1.0V of the rated voltage thereof.
The waveforms of the driving signals outputted from the driving circuits may be ac waves, such as ac sine waves as shown in fig. 8A, ac triangular waves, ac sawtooth waves, and ac square waves as shown in fig. 8B.
The waveform of the drive signal output from each of the drive circuits may be a dc wave, for example, a dc half sine wave shown in fig. 8C or a dc square wave shown in fig. 8D, a dc triangular wave or a dc sawtooth wave, and preferably a dc square wave.
When the exciting coil 1a is driven by using a direct current waveform, the direction of the magnetic force generated by the exciting coil 1a is not changed because the direction of the current is not changed all the time, the elastic force of the spring 1c is required for the rebound of the vibrator, and no current passes through the coil in the rebound stage of the vibrator. When the exciting coil 1a is driven by using an alternating current waveform, the direction of the magnetic force generated by the exciting coil 1a also changes periodically due to the periodic change of the current direction, the vibration rebound is not only influenced by the elastic force of the spring, but also influenced by the magnetic force generated by the coil, and the direction is consistent with the direction of the rebound force of the spring, so the acceleration and the vibration amplitude are better than those of the driving of the direct current waveform, the vibration starting time of the screen vibrator is shorter than that of the driving of the direct current waveform, but the alternating current driving waveform can more easily meet the resonance condition, and when the spring 1c is not reasonably designed, the fatigue fracture of the spring 1c or the damage to the coil or other structures due to the overlarge vibration amplitude of the vibration oscillator are easily caused.
In a second embodiment of the present invention, a screen vibration system is provided, which includes a plurality of screen vibrators as described in the first embodiment, each of the screen vibrators is attached to the whole natural frequency of the back surface of the screen, and generally, in order to ensure that no speckle appears in the whole screen range, each of the screen vibrators needs to be uniformly arranged in the whole back surface area of the screen.
Further, it is considered that when a plurality of screen vibrators vibrate simultaneously on the back surface of the screen, if the frequencies of the screen vibrators are the same, standing waves are formed in the screen range, resulting in that the amplitude of a partial region is enhanced, and the amplitude of a partial region is reduced or does not vibrate, and fig. 10 is a schematic diagram of the formation of the standing waves. To solve the problem, referring to fig. 11, a screen vibration system according to a second embodiment of the present invention includes a screen vibrator module 1 and a driving circuit module 2, where the screen vibrator module 1 includes a plurality of screen vibrators, and the plurality of screen vibrators are used for being attached to the back of a screen, specifically, directly attached to the back of the screen. Each screen vibrator can drive the screen to vibrate together when being driven.
Each screen vibrator has the structure and characteristics described above in the first embodiment. Only two screen vibrators 11 and 12 are shown in fig. 10 as an example, and may be designed to include any number.
The plurality of screen vibrators have at least two different overall natural frequencies, e.g., the overall natural frequencies of the screen vibrator 11 and the screen vibrator 12 are f01And f02。
The driver circuit module 2 includes a plurality of driver circuits, and fig. 9 also illustrates two driver circuits, i.e., the driver circuit 21 and the driver circuit 22, but may be designed to include any number of driver circuits.
The driving signals output by the driving circuits have at least two different driving frequencies, wherein each driving frequency corresponds to each integral natural frequency one by one, and each driving circuit is electrically connected with the screen vibrator with the corresponding integral natural frequency and is used for driving the corresponding screen vibrator. For example, the drive circuit 21 has a natural frequency f with respect to all the components01The screen vibrator is electrically connected with and driven by the driving circuit 22 and all the integral natural frequency f02The screen vibrator is electrically connected and driven.
The reason why the plurality of screen vibrators have two or more different overall natural frequencies is to avoid the formation of standing waves as shown in fig. 9. Therefore, the screen vibration system provided by the utility model particularly adopts at least two screen vibrators with integral natural frequencies, wherein the integral natural frequencies are respectively f01And f02. Taking fig. 10 and 11 as an example, the screen vibrator 11 and the screen vibrator 12 are driven by a drive circuit 21 and a drive circuit 22, respectively, and the drive circuit 21 outputs a drive frequency fout1And the driving frequency of the output of the driving circuit 22 is fout2May vary within a predetermined range of variation, which may be predicted to be 10Hz, i.e. f01-20Hz≤fout1≤f01+20Hz，f02-20Hz≤fout2≤f02+20Hz，fout1And fout2Random or periodic variations are made within this range to vary the amplitude and frequency of vibration of the vibrator. At the same time, the voltage V of the driving signal outputted from the driving circuit 21 and the driving circuit 22out1And Vout2Each varying within a preset variation range of the respective rated voltage, e.g. preset to 1.0V, Vout1And Vout2The vibration amplitude of the screen vibrator can be changed by varying within + -1.0V of the rated voltage of each screen vibrator with time.
The second embodiment not only enables the whole screen range to generate more uniform vibration and effectively removes speckles of laser projection pictures, but also can avoid the formation of fixed position standing waves at the back of the screen by finely adjusting the voltage amplitude and the driving frequency of the driving signal of the screen vibrator and enabling the driving frequency of each driving circuit to be unequal to the integral natural frequency of the corresponding screen vibrator.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (13)

1. The screen vibrator is characterized by being used for being attached to the back of a screen, and the integral natural frequency of the screen vibrator is f0Said f0Between 5 and 200 Hz; the screen vibrator comprises an exciting coil, a magnet and a spring;
the exciting coil can generate electromagnetic force when being driven;
the magnet is fixedly connected with the spring, and the magnet can drive the spring to resonate together when being influenced by the electromagnetic force and vibrate, and the spring transmits vibration waves to the screen.
2. The screen vibrator of claim 1, further comprising a drive circuit electrically connected to the excitation coil.
3. The screen vibrator of claim 2, wherein the drive circuit outputs a drive signal having a drive frequency foutSaid foutIs not equal to f0And f is0-20Hz≤fout≤f0+20Hz。
4. The screen vibrator of claim 1, further comprising a housing, the housing adapted to be attached to the screen; the exciting coil, the magnet and the spring are arranged in the shell, the first end of the spring is fixedly connected with the magnet, and the second end of the spring is connected to the inner wall of the shell.
5. The screen vibrator of claim 4, wherein a base is built into the housing;
the base is provided with a coil mounting groove, the coil mounting groove is internally provided with the exciting coil, and the base is also provided with a spring fixing column;
the magnet is positioned in the exciting coil, and the exciting coil and the magnet are separated and coaxial;
the second end of the spring is connected to the spring fixing column, and connection with the inner wall of the shell is achieved.
6. The screen vibrator according to claim 2, wherein the waveform of the driving signal outputted from the driving circuit is an ac wave.
7. The screen vibrator according to claim 6, wherein the ac wave is one of a sine wave, an ac triangular wave, an ac sawtooth wave, and an ac square wave.
8. The screen vibrator according to claim 2, wherein the waveform of the driving signal outputted from the driving circuit is one of a dc half sine wave and a dc square wave.
9. The screen vibrator according to claim 1, wherein the spring is one of a flat leaf spring, a spiral spring, a wire, a tower spring, a coil spring, and a disc spring.
10. The screen vibrator according to claim 2, wherein the driving circuit outputs a driving signal having a frequency of 50Hz and a voltage range of greater than 0 and equal to or less than 36V.
11. A screen vibratory system, comprising:
a plurality of screen vibrators as claimed in any one of claims 2, 3, 6-8, each screen vibrator attached to the back of the screen.
12. The screen vibration system as recited in claim 11, wherein at least two different overall natural frequencies are present in a plurality of the screen vibrators;
the screen vibration system also comprises a plurality of driving circuits, and driving signals output by the driving circuits at least have two different driving frequencies, wherein each driving frequency corresponds to each integral natural frequency one to one; each driving circuit is electrically connected with the corresponding screen vibrator with the integral natural frequency and used for driving the corresponding screen vibrator.
13. The screen vibration system according to claim 11 or 12, wherein the driving frequency and/or the voltage amplitude of the driving signal outputted from each of said driving circuits varies within a predetermined variation range.
CN202122053584.7U 2021-08-27 2021-08-27 Screen vibrator and screen vibration system Active CN215599494U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202122053584.7U CN215599494U (en) 2021-08-27 2021-08-27 Screen vibrator and screen vibration system
PCT/CN2022/086125 WO2023024528A1 (en) 2021-08-27 2022-04-11 Screen vibrator and screen vibration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122053584.7U CN215599494U (en) 2021-08-27 2021-08-27 Screen vibrator and screen vibration system

Publications (1)

Publication Number Publication Date
CN215599494U true CN215599494U (en) 2022-01-21

Family

ID=79883354

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122053584.7U Active CN215599494U (en) 2021-08-27 2021-08-27 Screen vibrator and screen vibration system

Country Status (2)

Country Link
CN (1) CN215599494U (en)
WO (1) WO2023024528A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024528A1 (en) * 2021-08-27 2023-03-02 深圳市时代华影科技股份有限公司 Screen vibrator and screen vibration system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2017222B2 (en) * 1970-04-10 1978-04-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Projection screen for laser images - is maintained in vibration to reduce granulation effects
JP2937939B2 (en) * 1996-04-25 1999-08-23 松下電器産業株式会社 Exciter, excitation device and portable terminal device
KR101113561B1 (en) * 2010-02-08 2012-02-24 삼성전기주식회사 A vertical vibrator
CN105759553A (en) * 2016-05-10 2016-07-13 郑强 Screen speckle removing system and speckle removing method thereof
CN206990938U (en) * 2017-08-08 2018-02-09 数码辰星科技发展（北京）有限公司 A kind of laser speckle eliminates system vibrator shell and laser speckle eliminates system
CN108319099A (en) * 2018-03-09 2018-07-24 芜湖影星巨幕有限公司 A kind of small vibrating device for eliminating speckle applied to laser light source projection screen
CN108845477A (en) * 2018-09-04 2018-11-20 芜湖影星巨幕有限公司 It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source
CN215599494U (en) * 2021-08-27 2022-01-21 深圳市时代华影科技股份有限公司 Screen vibrator and screen vibration system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024528A1 (en) * 2021-08-27 2023-03-02 深圳市时代华影科技股份有限公司 Screen vibrator and screen vibration system

Also Published As

Publication number Publication date
WO2023024528A1 (en) 2023-03-02

Similar Documents

Publication Publication Date Title
JP4258696B2 (en) Sound equipment
CN1753576A (en) Electrostatic ultrasonic transducer and ultrasonic speaker
JPH09233798A (en) Vibration actuator for pager
TW200726290A (en) Electro-acoustic transducer and manufacturing method thereof
KR102010926B1 (en) Panel excitation type speaker
TW515221B (en) Multifunction acoustic device
TWM382681U (en) multi function micro speaker
CN215599494U (en) Screen vibrator and screen vibration system
GB2357215A (en) Resonant panel loudspeakers
CN218352729U (en) Exciter and electronic device
KR100953694B1 (en) Thin multi-function vibration actuator
JP4564987B2 (en) Vibration / noise reduction device
US20200092652A1 (en) Transducer vibrating diaphragm structure, flat panel speaker and earphone therewith
KR101439935B1 (en) Sound Output Device
CN206251328U (en) Magnetic film oscillating flat plate loudspeaker
US6785397B2 (en) Electro-acoustic converter
CN213484731U (en) Flat round micro vibrator
CN106507257A (en) Magnetic film oscillating flat plate speaker and its assembly method
CN103929702B (en) Double-piezoelectric-type bone conduction auditory device based on displacement amplification
JP2000050384A (en) Speaker device
CN207652690U (en) Full-frequency vibration loudspeaker system and the electronic equipment for having this system
CN219718068U (en) Screen vibrator
JPH11308691A (en) Loud speaker system
JP2011142493A (en) Energy regeneration circuit
CN215010704U (en) Acoustic module and equipment with same

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant