Modulation type piezoelectric loudspeaker, loudspeaker system and control method thereof

A piezoelectric speaker and modulation technology, which is applied in the field of speakers, can solve the problems of increasing the occupied area of ​​piezoelectric speakers, and achieve the effects of simple and reliable structure, miniaturization, and small footprint

Active Publication Date: 2014-12-17
KINGTONE INNOVATION BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to obtain sufficient air flow in the existing piezoelectric speakers, it is necessary to use a larger area of ​​the piezoelectric sheet to obtain a larger area of ​​air vibration to make up for the shortcomings of the smaller amplitude of the piezoelectric material, thus increasing the size of the piezoelectric speaker. occupied area

Method used

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  • Modulation type piezoelectric loudspeaker, loudspeaker system and control method thereof
  • Modulation type piezoelectric loudspeaker, loudspeaker system and control method thereof
  • Modulation type piezoelectric loudspeaker, loudspeaker system and control method thereof

Examples

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Embodiment 1

[0047] This embodiment provides a modulated piezoelectric speaker, such as figure 1 As shown, the loudspeaker includes a casing 11 , and the casing 11 includes a casing 111 with openings at both ends and a cavity inside, an upper cover 112 closing the top of the casing 111 , and a lower cover 113 closing the bottom of the casing 111 . In the cavity, a sounding piezoelectric film 12 , a sounding diaphragm 13 , a piezoelectric valve 14 , a control diaphragm 15 and a control piezoelectric film 16 are sequentially arranged from top to bottom. The sounding piezoelectric film 12 is bonded or welded together with the sounding diaphragm 13 , and the control diaphragm 15 and the control piezoelectric film 16 are bonded or welded together. The modulated piezoelectric speaker in this embodiment can realize the miniaturization of the product by adopting the current traditional piezoelectric and structural technology, and can also realize the miniaturization of the product by adopting the ...

Embodiment 2

[0057] This embodiment provides a speaker system, such as Figure 7 As shown, the speaker system includes the modulated piezoelectric speaker 1 , the signal generation circuit 2 , the signal processing circuit 3 , and the piezoelectric amplification and driving circuit 4 as described in the first embodiment.

[0058] Wherein, the signal generating circuit 2 is used to generate source driving signals respectively corresponding to the operating frequencies of the sounding piezoelectric sheet 12 and the control piezoelectric sheet 16 . The signal processing circuit 3 is used to convert the input music or voice signal into an audio electrical signal and a control electrical signal, and modulate the audio electrical signal and the control electrical signal to the source driving signal of the sounding piezoelectric sheet 12 and the control piezoelectric sheet 16 Above, the audio driving electrical signal and the control driving electrical signal are formed, and the audio driving ele...

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PUM

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Abstract

The invention discloses a modulation type piezoelectric loudspeaker, a loudspeaker system and a control method thereof and relates to the technical field of loudspeakers. The modulation type piezoelectric loudspeaker comprises a casing, a sound production piezoelectric piece, a sound production vibrating diaphragm and a piezoelectric valve, wherein the sound production piezoelectric piece and the sound production vibrating diaphragm are combined together. The sound production piezoelectric piece is used for driving the sound production vibrating diaphragm to generate oscillation air flow under the driving of audio driving electrical signals; and the piezoelectric valve is used for moving under the driving of control driving electrical signals so as to open or seal an air outlet of oscillating air flow or adjust the opening degree of the air outlet. The loudspeaker system and the loudspeaker system control method are provided. According to the modulation type piezoelectric loudspeaker, the opening and closing of the air outlet of the oscillating air flow generated by the sound production vibrating diaphragm and the size of the air outlet are controlled through the opening and closing of the piezoelectric valve, so that frequency of sound signals output by the loudspeaker is changed, high-fidelity replayed sounds are obtained while enough output air flow quantity is guaranteed, the structure is simple and reliable, the area of the piezoelectric piece does not need to be increased, and miniaturization is achieved easily.

Description

technical field [0001] The invention relates to the technical field of loudspeakers, in particular to a modulated piezoelectric loudspeaker, a loudspeaker system using the loudspeaker and a control method for the loudspeaker system. Background technique [0002] With the development of microelectronics technology and wireless communication technology, many thin portable devices (such as mobile phones, tablet computers, notebook computers, etc.) appear on the market. Due to their small size, these devices (such as thin mobile phones) have extremely high requirements on the size of the components used in them, and need to use thin and small-sized sound emitting components. [0003] However, traditional sounding components, limited by their sounding principles, sacrifice the air capacity that can be pushed while miniaturizing, making the low-frequency playback performance of the device worse, and the volume becomes smaller, which cannot meet consumers' increasing demand for Re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/00H04R7/04H04R3/00
Inventor 袁世明
Owner KINGTONE INNOVATION BEIJING TECH
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