发明名称 |
ELECTRO-ACOUSTIC TRANSDUCER, ELECTRONIC APPARATUS, ELECTRO-ACOUSTIC CONVERSION METHOD, AND SOUND WAVE OUTPUT METHOD OF ELECTRONIC APPARATUS |
摘要 |
There are provided a vibration film (21) having a piezoelectric element, a magnetic circuit (20) which generates magnetic force on the basis of a first electric signal and vibrates the vibration film (21) by the magnetic force; and an adjustment unit (31) which generates a second electric signal on the basis of the first electric signal and applies a voltage based on the second electric signal between both surfaces of the piezoelectric element. The amplitude of the entire vibration film (21) is expanded by making the vibration by the magnetic force, which is generated from the magnetic circuit (20), and the vibration, which is generated by application of a voltage to the piezoelectric element, synchronize with each other.
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申请公布号 |
US2012257772(A1) |
申请公布日期 |
2012.10.11 |
申请号 |
US201013517478 |
申请日期 |
2010.12.17 |
申请人 |
ONISHI YASUHARU;SATO SHIGEO;KURODA JUN;MURATA YUKIO;KISHINAMI YUICHIRO;KAWASHIMA NOBUHIRO;KOMODA MOTOYOSHI;NEC CORPORATION |
发明人 |
ONISHI YASUHARU;SATO SHIGEO;KURODA JUN;MURATA YUKIO;KISHINAMI YUICHIRO;KAWASHIMA NOBUHIRO;KOMODA MOTOYOSHI |
分类号 |
H04R17/00 |
主分类号 |
H04R17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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