Film speaker and production method thereof

A manufacturing method and loudspeaker technology, applied in the direction of sensors, planar diaphragms, diaphragm structures, etc., to achieve the effect of simple manufacturing process and low cost

Inactive Publication Date: 2014-08-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because commercial piezoelectric electrets are usually opaque film materials, the disclosed piezoelectric electret film loudspeaker array is a non-transparent film device

Method used

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  • Film speaker and production method thereof
  • Film speaker and production method thereof
  • Film speaker and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The output of the audio amplifier device 1 is a constant voltage output mode, and the output voltage is 70V and 100V, which can be switched in two gears.

[0028] The specific preparation process of the flexible transparent electroacoustic conversion film 4 is as follows: (1) The 12.5um thick FEP film produced by DuPont Company is used as the raw material. First cut the FEP film into a 6cm*6cm sample film, and then use the embossing method to form an uneven pattern on the surface of the FEP sample film to obtain the second polymer film and the third polymer film described in the present invention. . The pattern of the embossing mold is a circular array pattern, the diameter of each circular pattern is 1mm, and the distance between the center points of two adjacent circular patterns is 1.2mm. (2) The second polymer film and the third polymer film are laminated together, and melted and thermally bonded at a temperature of 300° C. to obtain the fourth polymer film...

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PUM

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Abstract

The invention relates to a film speaker, which consists of an audio power amplification device and a flexible transparent electro-acoustic transformation film, wherein the output end of the audio power amplification device is connected with the flexible transparent electro-acoustic transformation film, and the audio power amplification device amplifies the voltage of a 20Hz to a 20kHz audio signal inputted by the input end to 10V to 500V. The production method comprises following steps that a fluctuated structure is formed on the surface of a first polymer film through ways such as impressing, plastic molding and the like so as to form a second polymer film or a third polymer film. The second polymer film and the third polymer film are bonded together to form a fourth polymer film; the fourth polymer film is electro-statically processed or processed by direct-current voltage for 2ms to 1h to obtain the flexible transparent electro-acoustic transformation film; and the output end of the audio power amplification device is connected onto two electric conductive electrodes of the flexible transparent electro-acoustic transformation film to obtain a transparent film speaker. The film speaker is simple in structure, novel in concept and convenient to use.

Description

technical field [0001] The invention relates to a thin-film loudspeaker and a manufacturing method thereof, belonging to the technical field of electroacoustic devices. Background technique [0002] The use of ultra-thin, ultra-light, energy-saving and environment-friendly film speakers is a new development trend in consumer electronics industries such as mobile phones, MP3 / MP4 with external amplifiers, portable audio-visual products, and handheld electronic game consoles. CN 102143425 A discloses a film loudspeaker array using piezoelectric electret films as electroacoustic conversion materials. However, since commercial piezoelectric electrets are usually opaque film materials, the disclosed piezoelectric electret film speaker array is a non-transparent film device. Contents of the invention [0003] The object of the present invention is to provide a transparent, flexible, ultra-thin and ultra-light film speaker and its manufacturing method. [0004] The thin-film...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/06H04R31/00H04R7/04
Inventor 张晓青张欣梧
Owner TONGJI UNIV
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