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Resonance photic driving sounding apparatus

A sound-generating device and light-driven technology, which is applied in the direction of sound-generating devices and instruments, can solve problems such as insecurity and limitation of light wave transmission, and achieve the effects of improving safety, reducing costs, and reducing power

Inactive Publication Date: 2012-05-23
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution requires a higher-power laser to cause sufficient thermal expansion of the air layer near the sound-emitting film, which limits long-distance light wave transmission, and at the same time, high-power lasers will also bring unsafe factors

Method used

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  • Resonance photic driving sounding apparatus
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  • Resonance photic driving sounding apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 A resonant light-driven sounding device shown includes a light source 101, a transmission fiber 106, a casing 107, and a sound-emitting film 108 fixed in the casing 107. The light source 101 generates continuous output light waves, and the output light waves pass through The transmission optical fiber 106 is injected into the sound-emitting film 108, the light source 101 is a semiconductor light-emitting device, and the light source 101 is connected with a driving current source 201, and the driving current source 201 can generate a driving current modulated by the audio signal 104. The light source 101 can generate output light waves whose light intensity varies with the driving current, and a high-speed optical switch 203 is arranged on the transmission fiber 106 , the switching frequency of the high-speed optical switch 203 is the resonance frequency of the sound-emitting film 108 . The driving current source 201 only loads the continuous current of ...

Embodiment 2

[0024] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is: the housing 107 is closed, and the housing 107 is filled with a gas 112 such as carbon dioxide gas, and the sounding film 108 is fixed on the inner wall of the housing 107 , and the wavelength of the absorption spectrum of the gas 112 overlaps with the wavelength of the output light of the light source 101 . A preferred method is that the inner wall of the casing 107 is coated with high reflectivity, so that the pulsed output light waves input into the casing 107 can be fully absorbed by the gas 112 filled inside. The gas 112 absorbs the incident light to cause temperature changes, resulting in the volume expansion of the gas 112, which immediately causes the vibration of the sound-emitting film 108. The volume change of the gas 112 is proportional to the intensity of the incident light wave. The resonant frequency, so the sounding film 108 is always in a resonant state, and the mag...

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Abstract

The invention discloses a resonance photic driving sounding apparatus which comprises a light source, a transmission fiber, a housing and a sounding film fixed in the housing. The light source generates continuous output light waves which are shot to the sounding film through the transmission fiber. The light source is a semiconductor luminescent device and is connected with a driving current source. The driving current source can generate driving current. The light source can generate the output light waves whose light wave intensity changes with the driving current. The transmission fiber is provided with a high speed optical switch. Switch frequency of the high speed optical switch is resonance frequency of the sounding film. According to the invention, by utilizing small input optical power, large sounding power can be generated, and the resonance photic driving sounding apparatus has the advantages of simple structure, convenient use, low production cost, and convenient popularization and application.

Description

technical field [0001] The invention relates to a sounding device, in particular to a resonant light-driven sounding device. Background technique [0002] Existing loudspeakers have been developed for hundreds of years. There are many types, different performances and different sizes, but their working principle is to use electric energy to drive components to generate mechanical vibrations, so that the density of the air appears dense and the density of the air is reduced. The state of density spreads, allowing people to hear the sound. Existing loudspeakers rely on changes in current and voltage to drive components to generate mechanical vibrations, and must rely on conductors to transmit current and voltage changes, and conductors are easily disturbed and affected by the external environment. For example, in high-voltage and strong electromagnetic environments such as power plants and electric furnace factories, the speaker in the phone will be subject to electromagnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K9/00
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH