WO2021097889A1 - 一种屏幕发声设备及方法 - Google Patents

一种屏幕发声设备及方法 Download PDF

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Publication number
WO2021097889A1
WO2021097889A1 PCT/CN2019/121577 CN2019121577W WO2021097889A1 WO 2021097889 A1 WO2021097889 A1 WO 2021097889A1 CN 2019121577 W CN2019121577 W CN 2019121577W WO 2021097889 A1 WO2021097889 A1 WO 2021097889A1
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Prior art keywords
middle frame
vibrator
screen
exciter
vibration
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Ceased
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PCT/CN2019/121577
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English (en)
French (fr)
Inventor
葛欢
王尧
毛路斌
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AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Pte Ltd
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AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Pte Ltd
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Publication of WO2021097889A1 publication Critical patent/WO2021097889A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to the technical field of acoustic equipment, in particular to a screen sounding equipment and method.
  • Existing screen sound-producing devices use an exciter to drive the device structure to vibrate and sound.
  • the structure can be the panel, back cover, etc.
  • the exciter When the exciter is working, it drives the screen to vibrate and produce sound. While driving the screen to vibrate, it will also give a driving force to the middle frame of the mobile terminal, causing the middle frame of the mobile terminal to vibrate, and the vibration of the middle frame is transmitted to the back cover, because the back cover is thin and light. , It will also cause obvious vibration of the back cover. Therefore, the user can clearly perceive this vibration when holding the mobile terminal.
  • the vibration sensation transferred from the back cover to the user's hand is not conducive to the user's holding the mobile terminal for a long time, and affects the user's comfort when using this type of mobile terminal.
  • the main purpose of the present invention is to provide a screen sounding device and method to solve the problem that the existing screen sounding device has excess vibration when driving the screen to vibrate and sound, which affects the user's long-term holding of the mobile terminal.
  • the first aspect of the embodiments of the present invention provides a screen sounding device, including a screen, a back cover, and a middle frame interposed between the screen and the back cover, and the screen and the back cover are respectively Fixed on both sides of the middle frame to form a cavity together with the middle frame; the middle frame is provided with an exciter fixed on the screen;
  • a vibrator is also fixed on the middle frame, and the vibrator is placed between the middle frame and the back cover;
  • the screen sound generating device further includes a signal processor electrically connected to the vibrator and the exciter;
  • the signal processor When the signal processor sends a first driving signal to the exciter to cause the screen to vibrate and produce sound, the signal processor simultaneously processes the first driving signal to obtain a second driving signal and sends it to the vibrator, so that The vibrator and the exciter perform synchronous reverse vibration to offset the vibration of the middle frame and/or the back cover.
  • the signal processor includes a signal calculation module and a signal sending module
  • the signal calculation module is configured to set the second drive signal input to the vibrator according to the first drive signal input to the exciter
  • the signal sending module is configured to send the second driving signal to the vibrator, so that when the vibrator drives the middle frame to vibrate with the second driving signal, the middle frame and/or the The vibration response of the back cover and the vibration response of the middle frame and/or the back cover when the exciter drives the screen to vibrate with the first driving signal to produce sound.
  • the signal calculation module includes a first calculation unit, a second calculation unit, a third calculation unit, and a transfer function calculation unit;
  • the first calculation unit is configured to calculate the vibration response Y 1 (s) of the middle frame when the exciter drives the screen to vibrate and produce sound with the first driving signal;
  • the second calculation unit is configured to calculate the vibration response Y 2 (s) at any position on the back cover when the exciter is not working and the vibrator drives the middle frame to vibrate with the second driving signal. );
  • the third calculation unit is configured to calculate the response Y(s) of any position on the middle frame of the exciter and the vibrator when the input signal is X(s);
  • the transfer function calculation unit is used to calculate the transfer function H(s) of the signal processor when the response Y(s) at any position of the middle frame is 0;
  • the signal processor with the transfer function H(s) makes the vibration response of the middle frame and/or the back cover when the vibrator drives the middle frame to vibrate with the second driving signal, and When the exciter drives the screen to vibrate and sound with the first driving signal, the vibration responses of the middle frame and/or the back cover cancel each other out.
  • the calculation formula of the vibration response Y 1 (s) of the middle frame is:
  • Y 1 (s) X 1 (s) ⁇ H 1 (s), where X 1 (s) is the input signal of the exciter, and H 1 (s) is the system including the exciter, the middle frame and the vibration propagation path Transfer Function;
  • Y 2 (s) X 2 (s) ⁇ H 2 (s), where X 2 (s) is the input signal of the vibrator, and H 2 (s) is the system including the vibrator, the middle frame and the vibration propagation path Transfer Function;
  • Y(s) X(s) ⁇ H 1 (s)+X(s) ⁇ H(s) ⁇ H 2 (s), where H(s) is the transfer function of the signal processor, X(s) Is the first drive signal of the input exciter, X(s) ⁇ H(s) is the second drive signal of the input signal processor;
  • the part of the middle frame where the exciter is not fixed includes a plurality of target positions
  • the vibrator is provided at each of the target positions.
  • the vibrator is a z-direction vibration motor.
  • the second aspect of the present invention provides a screen sounding method, which is applied to the screen sounding device as described in the first aspect, and the method includes:
  • the vibrator is driven by the second driving signal, so that the vibrator and the exciter perform synchronous reverse vibration to cancel the vibration of the middle frame and/or the back cover.
  • the beneficial effect of the present invention is that the exciter is fixed between the middle frame and the screen to drive the screen to vibrate while driving the middle frame and the back cover to vibrate, and the vibrator is fixed between the middle frame and the back cover.
  • the vibrator vibrates at the same time and causes the middle frame to vibrate.
  • the vibrator and the exciter perform synchronous reverse vibration to counteract the vibration effect of the middle frame caused by the exciter.
  • the middle frame always receives pressure from the opposite direction, thus reducing the vibration of the middle frame, and at the same time reducing the transmission of the middle frame vibration to the back cover, and finally reducing the excess vibration caused by the back cover vibration and improving the user's long life.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a screen sound emitting device according to Embodiment 1 of the present invention
  • Figure 2 is a cross-sectional view in the direction of A-A in Figure 1;
  • FIG. 3 is a schematic diagram of internal signal transmission of the screen sound emitting device according to the first embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a screen sounding device provided in Embodiment 3 of the present invention.
  • FIG. 5 is a schematic diagram of the implementation process of the screen sounding method provided in the fourth embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of the screen sound emitting device 10
  • FIG. 2 is a schematic diagram of a three-dimensional structure of the screen sound emitting device.
  • the screen sounding device 10 includes a screen 11, a back cover 12, and a middle frame 13 placed between the screen 11 and the back cover 12.
  • the screen 11 and the back cover 12 are respectively fixed on both sides of the middle frame 13
  • Two cavities are formed, one cavity is the space formed between the middle frame 13 and the back cover 12, and the other cavity is the space formed between the middle frame 13 and the screen 11.
  • the middle frame 13 is provided with an exciter 131 fixed on the screen 11.
  • the screen 11 that has a fixed connection relationship with the exciter 131 also vibrates, thereby completing the sound function of the screen sound device 10.
  • the part of the middle frame 13 that is not provided with the exciter 131 is also fixed with a vibrator 132 and a signal processor 133 electrically connected to the vibrator 132.
  • the signal processor 133 controls the input signal in the vibrator 132, thereby controlling the vibrator 132 The vibration frequency, vibration phase and so on.
  • the vibrator 132 is placed between the middle frame 13 and the back cover 12.
  • the vibrator 132 may be a z-direction vibration motor.
  • the exciter 131 when the exciter 131 vibrates to cause the screen 11 to vibrate, that is, the exciter 131 vibrates.
  • the vibrator 132 When the middle frame 12 and the screen 11 vibrate, the vibrator 132 also vibrates, because the vibrator 132 is fixed to the middle frame 12.
  • the middle frame 13 also vibrates, and through the processing of the signal processor 133, the drive signal in the exciter 131 and the drive signal in the vibrator 132 have an antiphase vibration relationship, that is, the signal processor 133 responds to the input vibrator
  • the driving signal in 132 is processed, so that the exciter 131 vibrates and the vibration of the middle frame 13 and the vibrator 132 are combined with the vibration of the middle frame 13, and the vibrator 132 and the exciter 131 perform synchronous and reverse vibrations.
  • the signal processor 133 is used to obtain the driving signal of the input vibrator 132 according to the driving signal of the input exciter 131.
  • These two signals enable the middle frame 13 to obtain the force in the opposite direction, thereby reducing
  • the effect of the vibration of the middle frame 13 also reduces the transmission of the vibration of the middle frame 13 to the back cover 12, thereby reducing the vibration of the back cover 12, that is, to offset the vibration of the middle frame 13, the vibration of the back cover 12, or both the middle frame 13 and the back cover 12.
  • the effect of the vibration of the back cover 12 is used to obtain the driving signal of the input vibrator 132 according to the driving signal of the input exciter 131.
  • the embodiment of the present invention also shows a schematic diagram of the signal transmission of the internal circuit in the screen sound generating device 10.
  • the driving signals input to the exciter 131 and the vibrator 132 are originally the same, but the signal input to the exciter 131 and the vibration Before the device 132, it is processed by the signal processor 133, so that the drive signals in the exciter 131 and the vibrator 132 are different, and the effect of anti-phase vibration is achieved.
  • the effect of the anti-phase vibration is that the vibrator and the vibrator 132 are different from each other.
  • the screen sounding device includes a screen, a back cover, and a middle frame placed between the screen and the back cover.
  • the screen and the back cover are respectively fixed on two opposite surfaces of the middle frame, and the exciter is fixed on the middle frame.
  • the vibrator is fixed between the middle frame and the back cover.
  • the middle frame always gets the pressure from the opposite direction, thus reducing the middle frame.
  • the vibration effect also reduces the transmission of the vibration of the middle frame to the rear cover, and finally reduces the excess vibration caused by the vibration of the rear cover, and improves the user's comfort in holding the mobile terminal for a long time.
  • the embodiment of the present invention shows each module unit related to the calculation of the second driving signal and the function of each module in the signal processor of the first embodiment.
  • the signal processor may include a signal calculation module and a signal sending module.
  • the drive signal input to the exciter is used as the first drive signal
  • the drive signal input to the vibrator is used as the second drive signal.
  • Drive signal, the functions of the signal calculation module and the signal sending module are as follows:
  • a signal calculation module for setting the second driving signal of the input vibrator according to the first driving signal of the input exciter
  • the signal sending module is used to send the second driving signal to the vibrator
  • the relationship between the first driving signal and the second driving signal is obtained by setting the parameters in the signal processor, so that the vibration response of the middle frame when the vibrator drives the middle frame to vibrate with the second driving signal, and the excitation The vibration response of the middle frame and/or the back cover cancels each other when the screen is driven by the first driving signal to vibrate and sound.
  • the embodiment of the present invention also shows the process of setting the parameters in the signal processor.
  • the process of setting the parameters in the signal processor is implemented in the signal calculation module.
  • the signal calculation module may It includes a first calculation unit, a second calculation unit, a third calculation unit, and a transfer function calculation unit.
  • the functions of the above-mentioned units are as follows;
  • the first calculation unit is used to calculate the vibration response Y 1 (s) of the middle frame when the exciter drives the screen to vibrate and sound with the first driving signal;
  • the second calculation unit is used to calculate the vibration response Y 2 (s) of any position on the back cover when the exciter is not working and the vibrator drives the middle frame to vibrate with the second driving signal;
  • the third calculation unit is used to calculate the response Y(s) of any position on the middle frame of the exciter and the vibrator when the input signal is X(s);
  • the transfer function calculation unit is used to calculate the transfer function H(s) of the signal processor when the response Y(s) at any position of the middle frame is 0;
  • the signal processor with a transfer function of H(s) can make the vibrator respond to the vibration of the middle frame when the middle frame vibrates with the second driving signal, and the middle frame and the middle frame when the exciter drives the screen to vibrate and produce sound with the first driving signal. / Or the vibration response of the back cover cancels each other out.
  • the calculation formula of the vibration response Y 1 (s) of the middle frame is:
  • Y 1 (s) X 1 (s) ⁇ H 1 (s), where X 1 (s) is the input signal of the exciter, and H 1 (s) is the system including the exciter, the middle frame and the vibration propagation path Transfer Function;
  • Y 2 (s) X 2 (s) ⁇ H 2 (s), where X 2 (s) is the input signal of the vibrator, and H 2 (s) is the system including the vibrator, the middle frame and the vibration propagation path Transfer Function;
  • Y(s) X(s) ⁇ H 1 (s)+X(s) ⁇ H(s) ⁇ H 2 (s), where H(s) is the transfer function of the signal processor, X(s) Is the first drive signal of the input exciter, X(s) ⁇ H(s) is the second drive signal of the input signal processor;
  • the embodiment of the present invention proposes the structure of another screen sounding device 20 based on the first embodiment above, including a screen 21, a back cover 22, a middle frame 23 placed between the screen 21 and the back cover 22, and an exciter 231 and vibrator 232.
  • the positional relationship among the screen 21, the back cover 22, the middle frame 23, and the exciter 231 is the same as that in the first embodiment, and will not be repeated here.
  • the middle frame 23 is not fixed with the actuator
  • the part includes multiple target positions 233.
  • the vibrator 232 is placed on the target position 233, and the signal generator 234 is connected to each vibrator 232.
  • Each vibrator 232 is responsible for the modeling and control of a target position 233.
  • Each vibration The application method of the device 232 is the same as that of the first embodiment.
  • the embodiment of the present invention exemplarily shows that the middle frame 23 is divided into four target positions 233, and each target position 233 is provided with a vibrator 232 to control the vibration at the target position 233. Therefore, when the vibration of the exciter 231 causes the screen 21 to vibrate and produce sound, the vibration cancellation area of the middle frame 23 can more effectively reduce the excess vibration caused by the vibration of the back cover 22.
  • an embodiment of the present invention also provides a screen sounding method, which is applied to the screen sounding device in Embodiment 1 to Embodiment 3.
  • the method includes but is not limited to the following steps:
  • S502 Calculate a second driving signal input to the vibrator according to the first driving signal
  • the vibration of the exciter and the vibration of the middle frame and the vibration of the vibrator and the vibration of the middle frame are in an antiphase relationship, which can be achieved
  • the effect of reducing the vibration of the middle frame also reduces the transmission of the vibration of the middle frame to the back cover, thereby achieving the purpose of reducing the excess vibration caused by the vibration of the back cover and improving the comfort of the user holding the mobile terminal for a long time.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

一种屏幕发声设备（10）及方法，设备包括屏幕（11）、后盖（12）、置于屏幕（11）和后盖（12）之间的中框（13），屏幕（11）和后盖（12）分别固定在中框（13）的两侧构成空腔；中框（13）上设有固定在屏幕上的激励器（131），中框（13）上还固定有振动器（132）以及与振动器（132）电连接的信号处理器（133），振动器（132）置于中框（13）和后盖（12）之间；激励器（131）振动致使屏幕（11）振动发声时，信号处理器（133）对振动器（132）中的驱动信号进行处理，使得振动器（132）与激励器（131）进行同步反向振动以抵消中框（13）和/或后盖（12）的振动。该技术方案可以减小后盖（12）振动带来的多余振感，提高用户长时间握持移动终端的舒适度。

Description

一种屏幕发声设备及方法 【技术领域】
本发明涉及声学设备技术领域，尤其涉及一种屏幕发声设备及方法。
【背景技术】
现有的屏幕发声设备通过激励器驱动设备结构振动发声，该结构可以是设备的面板，后盖等。激励器工作时，驱动屏幕振动发声，而在驱动屏幕振动的同时，也会给移动终端中框一个驱动力，使得移动终端中框产生振动，中框的振动传导到后盖，由于后盖轻薄，也会引起后盖较为明显的振动，因此，用户在握持移动终端时，可以明显感知这种振动。
然而，用户在握持移动终端时，由后盖传递到用户手中的振感不利于用户长时间的握持移动终端，影响用户使用该类型移动终端时的舒适感。
【发明内容】
本发明的主要目的在于提出一种屏幕发声设备及方法，以解决现有的屏幕发声设备中，驱动屏幕振动发声时具有多余振感，影响用户长时间的握持移动终端的问题。
为实现上述目的，本发明实施例第一方面提供一种屏幕发声设备，包括屏幕、后盖、置于所述屏幕和所述后盖之间的中框，所述屏幕和所述后盖分别固定在所述中框的两侧以与所述中框共同构成空腔；所述中框上设有固定在所述屏幕上的激励器；
所述中框上还固定有振动器，所述振动器置于所述中框和所述后盖之 间；
所述屏幕发声设备还包括与所述振动器、所述激励器电连接的信号处理器；
所述信号处理器发送第一驱动信号至所述激励器致使所述屏幕振动发声时，所述信号处理器同时对第一驱动信号进行处理得到第二驱动信号并发送至所述振动器，使得所述振动器与所述激励器进行同步反向振动以抵消所述中框和/或所述后盖的振动。
结合本发明第一方面，本发明第一实施方式中，所述信号处理器包括信号计算模块和信号发送模块；
所述信号计算模块，用于根据输入所述激励器的第一驱动信号设置输入所述振动器的第二驱动信号；
所述信号发送模块，用于将所述第二驱动信号发送至所述振动器，使所述振动器以所述第二驱动信号驱动所述中框振动时，所述中框和/或所述后盖的振动响应，与所述激励器以第一驱动信号驱动屏幕振动发声时所述中框和/或所述后盖的振动响应相互抵消。
结合本发明第一方面第一实施方式，本发明第二实施方式中，所述信号计算模块包括第一计算单元、第二计算单元、第三计算单元和传递函数计算单元；
所述第一计算单元，用于计算所述激励器以所述第一驱动信号驱动屏幕振动发声时，所述中框的振动响应Y 1(s)；
所述第二计算单元，用于计算所述激励器未工作、所述振动器以所述第二驱动信号驱动所述中框振动时，所述后盖上任一位置的振动响应Y 2(s)；
所述第三计算单元，用于计算所述激励器和所述振动器在输入信号为X(s)时，所述中框上任一位置的响应Y(s)；
所述传递函数计算单元，用于计算当所述中框任意位置的响应Y(s)为0时，信号处理器的传递函数H(s)；
所述传递函数为H(s)的信号处理器，使所述振动器以所述第二驱动信号驱动所述中框振动时所述中框和/或所述后盖的振动响应，与所述激励器以第一驱动信号驱动屏幕振动发声时所述中框和/或所述后盖的振动响应相互抵消。
结合本发明第一方面第二实施方式，本发明第三实施方式中，所述中框的振动响应Y 1(s)的计算公式为：
Y 1(s)＝X 1(s)·H 1(s)，其中，X 1(s)为激励器的输入信号，H 1(s)为包含激励器、中框以及振动传播路径的系统传递函数；
所述后盖上任一位置的振动响应Y 2(s)的计算公式为：
Y 2(s)＝X 2(s)·H 2(s)，其中，X 2(s)为振动器的输入信号，H 2(s)为包含振动器、中框及振动传播路径的系统传递函数；
所述中框上任一位置的响应Y(s)的计算公式为：
Y(s)＝X(s)·H 1(s)+X(s)·H(s)·H 2(s)，其中，H(s)为信号处理器的传递函数，X(s)为输入激励器的第一驱动信号，X(s)·H(s)为输入信号处理器的第二驱动信号；
则所述中框任意位置的响应Y(s)为0时，信号处理器的传递函数H(s)的计算公式为：
Figure PCTCN2019121577-appb-000001
结合本发明第一方面，本发明第四实施方式中，所述中框上未固定有所述激励器的部分包括多个目标位置；
每个所述目标位置上设有所述振动器。
结合本发明第一方面，本发明第五实施方式中，所述振动器为z向振动马达。
本发明第二方面提供了一种屏幕发声方法，应用于如上述第一方面所述的屏幕发声设备，方法包括：
获取输入激励器的第一驱动信号；
根据所述第一驱动信号计算输入振动器的第二驱动信号；
通过所述第二驱动信号驱动所述振动器，使得所述振动器与所述激励器进行同步反向振动以抵消所述中框和/或所述后盖的振动。
本发明的有益效果在于：在激励器固定在中框和屏幕之间，驱动屏幕振动，同时带动中框及后盖振动的基础上，将振动器固定在中框和后盖之间，则在激励器振动致使屏幕振动发声时，振动器同时振动，并致使中框振动，而通过信号处理器的处理，振动器与激励器进行同步反向振动，从而抵消激励器导致的中框振动效果，此时中框始终获得来自相对方向的压力，因而起到了减少中框振动的效果，同时降低了中框振动向后盖的传递，最终减小后盖振动带来的多余振感，提高用户长时间的握持移动终端的舒适度。
【附图说明】
图1为本发明实施例一提供的屏幕发声设备的立体结构示意图；
图2为图1中A-A方向的剖视图；
图3为本发明实施例一提供的屏幕发声设备的内部信号传输示意图；
图4为本发明实施例三提供的屏幕发声设备的结构示意图；
图5为本发明实施例四提供的屏幕发声方法的实现流程示意图。
【具体实施方式】
下面结合附图和实施方式对本发明作进一步说明。
在后续的描述中，发明实施例序号仅仅为了描述，不代表实施例的优劣。
实施例一
如图1和图2所示，本发明实施例提供了一种屏幕发声设备10，图1屏幕发声设备10的立体结构示意图，图2为屏幕发声设备的立体结构示意图。
在本发明实施例中，屏幕发声设备10为包括屏幕11、后盖12、置于屏幕11和后盖12之间的中框13，屏幕11和后盖12分别固定在中框13的两侧构成两个空腔，一个空腔为中框13与后盖12之间构成的空间，另一个空腔为中框13与屏幕11之间构成空间。
中框13上设有固定在屏幕11上的激励器131，激励器131振动时，与其具有固定连接关系的屏幕11也振动，从而完成屏幕发声设备10的发声功能。
中框13上未设有激励器131的部分还固定有振动器132、与振动器132电连接的信号处理器133，信号处理器133控制振动器132中的输入信号，从而控制振动器132中的振动频率、振动相位等。
在具体应用中，振动器132置于中框13与后盖12之间。
在具体应用中，振动器132可以为z向振动马达。
在本发明实施例中，激励器131振动致使屏幕11振动发声时，即激励器131振动，连带中框12和屏幕11振动的同时，振动器132也振动，由于振动器132固定在中框12上，因此中框13也振动，并且，通过信号处理器133的处理，激励器131中的驱动信号与振动器132中的驱动信号呈反相振动关系， 即，信号处理器133对输入振动器132中的驱动信号进行处理，使得激励器131振动而连带中框13的振动与振动器132振动而连带中框13的振动，振动器132与激励器131进行了同步反向的振动。
则在本发明实施例中，信号处理器133，用于根据输入激励器131的驱动信号获得输入振动器132的驱动信号，此两种信号使得中框13获得相对方向的力，从而起到减少中框13振动的效果，也降低中框13振动向后盖12的传递，从而减小后盖12振动，即达到了抵消中框13的振动、后盖12的振动或同时抵消中框13和后盖12的振动的效果。
如图3所示，本发明实施例还示出了屏幕发声设备10中内部电路信号传输的示意图，输入激励器131和振动器132的驱动信号原本是相同的，但信号输入激励器131和振动器132之前，还通过信号处理器133进行处理，从而使得激励器131和振动器132中的驱动信号有所不同，且达到了反相振动的效果，其中，反相振动的效果为振动器与激励器进行同步反向振动所达到的效果。
本发明实施例提供的屏幕发声设备，包括屏幕、后盖、置于屏幕和后盖之间的中框，屏幕和后盖分别固定在中框的两个相对面上，激励器固定在中框和屏幕之间，驱动屏幕振动，同时带动中框及后盖振动，振动器固定在中框和后盖之间，则在激励器振动致使屏幕振动发声时，振动器同时振动，并致使中框振动，而通过信号处理器的处理，振动器与激励器进行同步反向振动，从而抵消激励器导致的中框振动效果，此时中框始终获得来自相对方向的压力，因而起到了减少中框振动的效果，同时降低了中框振动向后盖的传递，最终减小后盖振动带来的多余振感，提高用户长时间 的握持移动终端的舒适度。
实施例二
本发明实施例示出了上述实施例一的信号处理器中，有关于第二驱动信号计算的各模块单元，以及各模块的功能。
在本发明实施例中，信号处理器可以包括信号计算模块和信号发送模块，且在本发明实施例中，将输入激励器的驱动信号作为第一驱动信号，输入振动器的驱动信号作为第二驱动信号，则信号计算模块与信号发送模块的功能如下：
信号计算模块，用于根据输入激励器的第一驱动信号设置输入振动器的第二驱动信号；
信号发送模块，用于将第二驱动信号发送至振动器，
在具体应用中，通过设定信号处理器中的参数，来获得第一驱动信号和第二驱动信号的关系，使振动器以第二驱动信号驱动中框振动时中框的振动响应，与激励器以第一驱动信号驱动屏幕振动发声时中框和/或后盖的振动响应相互抵消。
本发明实施例还示出了设定信号处理器中的参数的过程，其中，设定信号处理器中的参数的过程在信号计算模块中实现，则在本发明实施例中，信号计算模块可以包括第一计算单元、第二计算单元、第三计算单元和传递函数计算单元，上述各单元的功能如下；
第一计算单元，用于计算激励器以第一驱动信号驱动屏幕振动发声时，中框的振动响应Y 1(s)；
第二计算单元，用于计算激励器未工作、振动器以第二驱动信号驱动 中框振动时，后盖上任一位置的振动响应Y 2(s)；
第三计算单元，用于计算激励器和振动器在输入信号为X(s)时，中框上任一位置的响应Y(s)；
传递函数计算单元，用于计算当中框任意位置的响应Y(s)为0时，信号处理器的传递函数H(s)；
其中，传递函数为H(s)的信号处理器，可以使振动器以第二驱动信号驱动中框振动时中框的振动响应，与激励器以第一驱动信号驱动屏幕振动发声时中框和/或后盖的振动响应相互抵消。
在一个实施例中，中框的振动响应Y 1(s)的计算公式为：
Y 1(s)＝X 1(s)·H 1(s)，其中，X 1(s)为激励器的输入信号，H 1(s)为包含激励器、中框以及振动传播路径的系统传递函数；
后盖上任一位置的振动响应Y 2(s)的计算公式为：
Y 2(s)＝X 2(s)·H 2(s)，其中，X 2(s)为振动器的输入信号，H 2(s)为包含振动器、中框及振动传播路径的系统传递函数；
中框上任一位置的响应Y(s)的计算公式为：
Y(s)＝X(s)·H 1(s)+X(s)·H(s)·H 2(s)，其中，H(s)为信号处理器的传递函数，X(s)为输入激励器的第一驱动信号，X(s)·H(s)为输入信号处理器的第二驱动信号；
则中框任意位置的响应Y(s)为0时，信号处理器的传递函数H(s)的计算公式为：
Figure PCTCN2019121577-appb-000002
实施例三
本发明实施例基于上述实施例一提出了另一屏幕发声设备20的结构，包括屏幕21、后盖22、置于所述屏幕21和所述后盖22之间的中框23，以及激励器231和振动器232。
在本发明实施例中，屏幕21、后盖22、中框23以及激励器231之间的位置关系与实施例一中相同，不再赘述，但中框23上未固定有所述激励器的部分包括多个目标位置233，振动器232置于目标位置233上，且信号发生器234与各振动器232连接，每个振动器232负责一个目标位置233的分别建模和控制，每个振动器232的应用方法与实施例一种相同。
如图4所示，本发明实施例示例性的示出了将中框23划分为4个目标位置233，每个目标位置233上设有一个振动器232，以控制目标位置233上的振动，从而扩大激励器231振动致使屏幕21振动发声时，中框23的振动抵消面积，更加有效的减小后盖22振动带来的多余振感。
实施例四
如图5所示，本发明实施例还提供了一种屏幕发声方法，应用于实施例一至实施例三中的屏幕发声设备，方法包括但不限于如下步骤：
S501、获取输入激励器的第一驱动信号；
S502、根据所述第一驱动信号计算输入振动器的第二驱动信号；
S503、通过所述第二驱动信号驱动所述振动器，使得所述振动器与所述激励器进行同步反向振动以抵消所述中框和/或所述后盖的振动。
在上述步骤S501至步骤S503中，通过对输入振动器中的驱动信号进行处理，使得激励器振动而连带中框的振动与振动器振动而连带中框的振动呈反相振动关系，可以起到减少中框振动的效果，同时也降低了中框振动向后盖的传递，从而达到减小后盖振动带来的多余振感，提高用户长时 间的握持移动终端的舒适度的目的。
以上所述实施例仅用以说明本发明的技术方案，而非对其限制；尽管前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围，均应包含在本发明的保护范围之内。

Claims (7)

  1. 一种屏幕发声设备，包括屏幕、后盖、置于所述屏幕和所述后盖之间的中框，所述屏幕和所述后盖分别固定在所述中框的两侧以与所述中框共同构成空腔；所述中框上设有固定在所述屏幕上的激励器，其特征在于：
    所述中框上还固定有振动器，所述振动器置于所述中框和所述后盖之间；
    所述屏幕发声设备还包括与所述振动器、所述激励器电连接的信号处理器；
    所述信号处理器发送第一驱动信号至所述激励器致使所述屏幕振动发声时，所述信号处理器同时对第一驱动信号进行处理得到第二驱动信号并发送至所述振动器，使得所述振动器与所述激励器进行同步反向振动以抵消所述中框和/或所述后盖的振动。
  2. 如权利要求1所述的屏幕发声设备，其特征在于，所述信号处理器包括信号计算模块和信号发送模块；
    所述信号计算模块，用于根据输入所述激励器的第一驱动信号设置输入所述振动器的第二驱动信号；
    所述信号发送模块，用于将所述第二驱动信号发送至所述振动器，使所述振动器以所述第二驱动信号驱动所述中框振动时，所述中框和/或所述后盖的振动响应，与所述激励器以第一驱动信号驱动屏幕振动发声时所述中框和/或所述后盖的振动响应相互抵消。
  3. 如权利要求2所述的屏幕发声设备，其特征在于，所述信号计算模块包括第一计算单元、第二计算单元、第三计算单元和传递函数计算单元；
    所述第一计算单元，用于计算所述激励器以所述第一驱动信号驱动屏幕振动发声时，所述中框的振动响应Y 1(s)；
    所述第二计算单元，用于计算所述激励器未工作、所述振动器以所述第二驱动信号驱动所述中框振动时，所述后盖上任一位置的振动响应Y 2(s)；
    所述第三计算单元，用于计算所述激励器和所述振动器在输入信号为X(s)时，所述中框上任一位置的响应Y(s)；
    所述传递函数计算单元，用于计算当所述中框任意位置的响应Y(s)为0时，信号处理器的传递函数H(s)；
    所述传递函数为H(s)的信号处理器，使所述振动器以所述第二驱动信号驱动所述中框振动时所述中框和/或所述后盖的振动响应，与所述激励器以第一驱动信号驱动屏幕振动发声时所述中框和/或所述后盖的振动响应相互抵消。
  4. 如权利要求3所述的屏幕发声设备，其特征在于，所述中框的振动响应Y 1(s)的计算公式为：
    Y 1(s)＝X 1(s)·H 1(s)，其中，X 1(s)为激励器的输入信号，H 1(s)为包含激励器、中框以及振动传播路径的系统传递函数；
    所述后盖上任一位置的振动响应Y 2(s)的计算公式为：
    Y 2(s)＝X 2(s)·H 2(s)，其中，X 2(s)为振动器的输入信号，H 2(s)为包含振动器、中框及振动传播路径的系统传递函数；
    所述中框上任一位置的响应Y(s)的计算公式为：
    Y(s)＝X(s)·H 1(s)+X(s)·H(s)·H 2(s)，其中，H(s)为信号处理器的传递函数，X(s)为输入激励器的第一驱动信号，X(s)·H(s)为输入信号处理器的第二驱动信号；
    则所述中框任意位置的响应Y(s)为0时，信号处理器的传递函数H(s)的计算公式为：
    Figure PCTCN2019121577-appb-100001
  5. 如权利要求1所述的屏幕发声设备，其特征在于，所述中框上未固定有所述激励器的部分包括多个目标位置；
    每个所述目标位置上设有所述振动器。
  6. 如权利要求1所述的屏幕发声设备，其特征在于，所述振动器为z向振动马达。
  7. 一种屏幕发声方法，其特征在于，应用于如权利要求1至6任一项所述的屏幕发声设备，包括：
    获取输入激励器的第一驱动信号；
    根据所述第一驱动信号计算输入振动器的第二驱动信号；
    通过所述第二驱动信号驱动所述振动器，使得所述振动器与所述激励器进行同步反向振动以抵消所述中框和/或所述后盖的振动。
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