A plane speaker

A flat-panel loudspeaker and loudspeaker technology, applied in the field of loudspeakers, can solve the problems of complex, enlarged rigid flat panel area, and high manufacturing cost of honeycomb panels

Inactive Publication Date: 2008-09-10
谭红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: (1) The manufacturing cost of the composite honeycomb panel is high; (2) The optimal design of the speaker needs to establish a complex model; (3) It is difficult to provide bass effect unless the area of ​​the rigid plate is increased, which makes the development miniaturized , high-quality flat-panel speakers have become very difficult

Method used

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  • A plane speaker
  • A plane speaker
  • A plane speaker

Examples

Experimental program
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Embodiment Construction

[0010] Such as figure 1 As shown, a planar loudspeaker includes a front surface diaphragm 11 and a rear surface diaphragm 12; the diaphragm has a flexible and bendable feature, and it can be various types of polymers, such as: polyimide (polyimide) film or Polyester film, or various thin cardboards, or various thin metal plates, such as aluminum foil or copper foil. The diaphragm is fixed to the frame 13 after being stretched by a pre-tightening force along at least one direction (x-x' or y-y' direction). As a result of the pre-tension stretching, a certain pre-stress is formed inside the film, and these tensile stresses can adjust the frequency response of the loudspeaker, especially the mid- and high-frequency responses. According to the current invention, the output sound pressure and frequency response of the loudspeaker can be adjusted by changing the diaphragm preload and surrounding constraints; increasing the diaphragm preload can enhance its mid- and high-frequency r...

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PUM

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Abstract

The invention relates to a speaker, in particular to a flat panel speaker which ensures electric energy is converted to sound energy. The flat panel speaker comprises a diaphragm, a frame and a driver system; the diaphragm is characterized by the flexibility and is stretched by a pretightening force along at least one direction, and then is fixed on the frame and coupled with a drive system, and vibrates to sound after being excited by the drive system. The drive system at least comprises a power amplifier and an executor. The executor can directly connected to the back surface of the diaphragm to excite the diaphragm to sound, and the change of fluid pressures in a cavity at the back of the diaphragm can also be controlled to indirectly excite the diaphragm to vibrate and sound. Output sound pressure and frequency response of the speaker can be modulated by changing the pretightening force and peripheral constraint of the diaphragm; the pretightening force of the diaphragm is improved to enhance the intermediate frequency and high frequency responses of the speaker, reduce the peripheral constraint of the diaphragm and enhance the low frequency response of the speaker.

Description

Technical field [0001] The invention relates to a loudspeaker, in particular to a plane loudspeaker which converts electric energy into sound energy. Background technique [0002] The planar speaker is a new type of electro-acoustic conversion system, its structure and sound generation principle are different from the traditional cone speaker. Traditional loudspeakers use the piston movement of the cone-shaped diaphragm to couple with air to produce sound; while planar speakers use the forced bending vibration of the plate to produce sound. Basically, the existing planar speakers use a rigid flat panel as the sounding medium. The flat panel generally has a honeycomb sandwich structure. Called a panel speaker. Its disadvantages are: (1) The manufacturing cost of the composite honeycomb panel is high; (2) The optimal design of the speaker needs to establish a complex model; (3) It is difficult to provide bass effect unless the area of ​​the rigid plate is increased, which ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/02H04R9/06H04R7/00
Inventor 谭红
Owner 谭红
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