专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3976897A Piezoelectric electro-acoustic diaphragm transducer with composite resilient backing 失效
标题翻译：具有复合弹性背衬的压电电声隔膜换能器
公开(公告)号：US3976897A
公开(公告)日：1976-08-24
申请号：US549339
申请日：1975-02-12
申请人： Masahiko Tamura , Kiyonori Iwama , Toshikazu Yoshimi , Takashi Oyaba
发明人： Masahiko Tamura , Kiyonori Iwama , Toshikazu Yoshimi , Takashi Oyaba
IPC分类号： H04R17/00 , H01L41/08
CPC分类号： H04R17/005 , Y10S310/80
摘要： An electro-acoustic transducer with a piezoelectric diaphragm which is backed with a plurality of different resilient members for imparting a suitable resiliency and/or tension to said diaphragm to highly improve its acoustic characteristics with a simple construction.
摘要翻译：一种具有压电隔膜的电声换能器，其具有多个不同的弹性构件的背面，用于赋予所述隔膜适当的弹性和/或张力，以通过简单的结构高度改善其声学特性。

2. 发明授权

US4170742A Piezoelectric transducer with multiple electrode areas 失效
标题翻译：具有多个电极区域的压电换能器
公开(公告)号：US4170742A
公开(公告)日：1979-10-09
申请号：US822061
申请日：1977-08-05
申请人： Tadasi Itagaki , Kiyonori Iwama , Toshikazu Yoshimi
发明人： Tadasi Itagaki , Kiyonori Iwama , Toshikazu Yoshimi
IPC分类号： H04R17/00 , H01L41/10
CPC分类号： H04R17/005 , Y10S310/80
摘要： An electro-acoustic transducer comprising a flexible film of piezoelectric material, at least one electrode provided on one side of said film amd a plurality of electrodes provided on the other side of said film to form a piezoelectric diaphragm and said piezoelectric diaphragm is imparted with a locally differing resiliency and/or tension, is provided. By using this piezoelectric electro-acoustic transducer in a loudspeaker, it is possible to improve acoustic characteristics thereof particularly in a high frequency range, to obtain a variety of acoustic characteristics and to effect motional feed back to minimize distortion of reproduced sound without involving any difficulty in manufacturing or affecting proper performance of the transducer.
摘要翻译： 1.一种电声换能器，包括压电材料的柔性膜，在所述膜的一侧上设置的至少一个电极，设置在所述膜的另一侧上的多个电极，以形成压电振膜，并且所述压电振膜被赋予提供局部不同的弹性和/或张力。通过在扬声器中使用该压电式电声换能器，可以特别在高频范围内改善其声学特性，以获得各种声学特性并实现运动反馈以最小化再现声音的失真而不涉及任何困难在制造或影响传感器的正常性能。

3. 发明授权

US4045695A Piezoelectric electro-acoustic transducer 失效
标题翻译：压电电声传感器
公开(公告)号：US4045695A
公开(公告)日：1977-08-30
申请号：US595631
申请日：1975-07-14
申请人： Tadasi Itagaki , Kiyonori Iwama , Toshikazu Yoshimi
发明人： Tadasi Itagaki , Kiyonori Iwama , Toshikazu Yoshimi
IPC分类号： H04R17/00 , H01L41/04
CPC分类号： H04R17/005
摘要： An electro-acoustic transducer comprising a flexible film of piezoelectric material, at least one electrode provided on one side of said film and a plurality of electrodes provided on the other side of said film to form a piezoelectric diaphragm and said piezoelectric diaphragm is imparted with a locally differing resiliency and/or tension, is provided. By using this piezoelectric electro-acoustic transducer in a loudspeaker, it is possible to improve acoustic characteristics thereof particularly in a high frequency range, to obtain a variety of acoustic characteristics and to effect motional feed back to minimize distortion of reproduced sound without involving any difficulty in manufacturing or affecting proper performance of the transducer.

4. 发明授权

US3973150A Rectangular, oriented polymer, piezoelectric diaphragm 失效
标题翻译：矩形取向聚合物，压电隔膜
公开(公告)号：US3973150A
公开(公告)日：1976-08-03
申请号：US549340
申请日：1975-02-12
申请人： Masahiko Tamura , Kiyonori Iwama , Toshikazu Yoshimi
发明人： Masahiko Tamura , Kiyonori Iwama , Toshikazu Yoshimi
IPC分类号： H02N2/04 , H04R17/00 , H01L41/04
CPC分类号： H04R17/005 , Y10S310/80
摘要： A piezoelectric electro-acoustic transducer employing as a diaphragm a uniaxially stretched film of a shape having the major axis and the minor axis, wherein the expansion-contraction direction of the diaphragm, in which a piezoelectric constant is at a maximum, is substantially in parallel with the minor axis thereof, whereby the piezoelectric electro-acoustic transducer can provide a high converting efficiency, especially in the low frequency range.
摘要翻译：一种使用具有长轴和短轴形状的单轴拉伸膜作为隔膜的压电式电声换能器，其中压电常数最大的膜片的伸缩方向基本上平行其短轴，由此压电式电声换能器可以提供高的转换效率，特别是在低频范围内。

5. 发明授权

US4268653A Process for preparation of a polymeric piezo-electric material and material prepared by said process 失效
标题翻译：用于制备由所述方法制备的聚合物压电材料和材料的方法
公开(公告)号：US4268653A
公开(公告)日：1981-05-19
申请号：US133996
申请日：1980-03-26
申请人： Masataka Uchidoi , Kiyonori Iwama , Tsutomu Iwamoto , Junichi Sako , Yoshihide Higashihata
发明人： Masataka Uchidoi , Kiyonori Iwama , Tsutomu Iwamoto , Junichi Sako , Yoshihide Higashihata
IPC分类号： H01L41/18 , H01L41/193 , H01L41/45 , B29C25/00 , H01L41/00
CPC分类号： H01L41/45 , H01L41/193 , H01L41/257 , Y10S310/80 , Y10T428/3154
摘要： A process for preparation of a polymeric piezo-electric material and material prepared by said process are described, wherein said process comprises polarizing a polymeric piezo-electric material by a polarization treatment which comprisescooling a vinylidene fluoride-trifluoroethylene copolymer from a temperature higher than the phase transition temperature of said copolymer which exists between room temperature and the melting point of said copolymer, and either maintaining the temperature range at which said copolymer possesses a maximum in dielectric constant occurs, or cooling gradually through said temperature range, while applying an electric field at least within said temperature range.
摘要翻译：描述了通过所述方法制备的聚合物压电材料和材料的制备方法，其中所述方法包括通过极化处理使聚合物压电材料偏振，其包括从偏二氯乙烯 - 所述共聚物的相转变温度在室温和所述共聚物的熔点之间存在，并且保持所述共聚物在介电常数中具有最大值的温度范围，或者在施加电场的同时逐渐冷却所述温度范围至少在所述温度范围内。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式