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Film speaker array

A loudspeaker array and film-type technology, applied in the field of loudspeakers, can solve the problems of inconvenient use, complicated loudspeaker structure, and large volume

Active Publication Date: 2013-10-09
SHENZHEN HORN AUDIO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the multiple components involved, moving coil and moving iron speakers are complex in structure, bulky and inconvenient to use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Please combine Figure 1-Figure 4 , the film-type loudspeaker array in this embodiment includes a piezoelectric electret film 110 , a circuit board assembly 120 and a connector 130 .

[0026] The piezoelectric electret film 110 is a porous polymer film with a thickness ranging from tens to hundreds of microns. Such as figure 1 and figure 2 As shown, the piezoelectric electret film 110 in this embodiment is square, and 3×3 block electrodes are correspondingly arranged on both sides to form an electrode array 112 . Each pair of block electrodes corresponding to both sides and the piezoelectric electret film between them form a speaker unit together. This embodiment includes 9 speaker units. The piezoelectric electret film 110 is provided with an electrode connection terminal 114 at the edge that is electrically connected to each bulk electrode on one side.

[0027] The porous polymer film deposits positive and negative charges on the upper and lower surfaces of the ...

Embodiment 2

[0036] Such as Figure 6 and Figure 7 As shown, the film speaker array of this embodiment includes a piezoelectric electret film 210 and a circuit board assembly 220 .

[0037] The piezoelectric electret film 210 is a porous polymer film with a thickness ranging from tens to hundreds of microns. The piezoelectric electret film 210 in this embodiment is square, and 3×3 block electrodes are correspondingly arranged on both sides to form an electrode array 212 . Each pair of block electrodes corresponding to both sides and the piezoelectric electret film between them form a speaker unit together. This embodiment includes 9 speaker units. The piezoelectric electret film 210 is provided with a first electrode connection end 214 and a second electrode connection end 216 at the edge, which are electrically connected to the electrodes on both sides.

[0038]The circuit board assembly 220 of this embodiment is fixed on the blank area of ​​the piezoelectric electret film 210 . The...

Embodiment 3

[0041] Such as Figure 8 and Figure 9 As shown, the film speaker array of this embodiment includes a piezoelectric electret film 310 , a circuit board assembly 320 and a connector 330 .

[0042] The piezoelectric electret film 310 is a porous polymer film with a thickness ranging from tens to hundreds of microns. The piezoelectric electret film 310 in this embodiment is square, and 3×3 block electrodes are correspondingly arranged on both sides to form an electrode array 312 . Each pair of block electrodes corresponding to both sides and the piezoelectric electret film between them form a speaker unit together. This embodiment includes 9 speaker units. The piezoelectric electret film 310 is provided with a first electrode connection end 314 and a second electrode connection end 316 at the edge, which are electrically connected to the electrodes on both sides.

[0043] The circuit board assembly 320 is provided with a speaker circuit (not shown in the figure), a circuit bo...

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Abstract

The invention relates to a film speaker array, which comprises a piezoelectric electret film and a circuit board assembly, wherein the piezoelectric electret film is a porous polymer film, and electrode arrays are respectively and correspondingly arranged on two sides of the piezoelectric electret film; a speaker circuit, and a circuit board input end and a circuit board output end which are electrically connected with a speaker circuit are arranged on the circuit board assembly, and the circuit board output end is electrically connected with electrode arrays arranged on two sides of the piezoelectric electret film. The film speaker array made of porous polymer film is integrated with the advantage of high directivity of the speaker array and the advantages of lightness, thinness, softness, simple structure, high reliability and low cost of the polymer piezoelectric electret, and greatly expands the application range of the speaker array, thereby being an alternative replacing the traditional speaker array in the theater, the meeting place, the classroom, the museum, the gymnasium and other circumstances.

Description

【Technical field】 [0001] The invention relates to the field of loudspeakers, in particular to a thin-film loudspeaker array. 【Background technique】 [0002] In theaters, venues, classrooms, museums, gymnasiums and other places, there are certain requirements for sound reinforcement. Usually one or two speakers can not achieve the effect of sound amplification, and the sound is non-directional, and a lot of energy is wasted in other directions (such as the ceiling) instead of spreading to the audience. If a loudspeaker array is used, the interference principle can be used to control the directivity of the sound, so as to obtain the effect of high power and long-range projection. For example, a linear speaker array is composed of a row of unit speakers, which has the advantages of uniform horizontal coverage, strong vertical directivity, and small sound energy attenuation in the radiation area. For sound reinforcement at the same place with the same volume, the linear speake...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R19/02
Inventor 方鹏朱彪
Owner SHENZHEN HORN AUDIO
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