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    • 5. 发明授权
    • Piezoelectric transformer
    • 压电变压器
    • US5701049A
    • 1997-12-23
    • US581425
    • 1995-12-29
    • Kouichi KanayamaNobuhiro Maruko
    • Kouichi KanayamaNobuhiro Maruko
    • H01L41/107H01L41/08
    • H01L41/107
    • A piezoelectric transformer has a piezoelectric substrate having first and second main faces. The substrate has first and second primary-side regions and a secondary-side region in its longitudinal direction in this order. The first region has a length of a half wavelength of stress distribution at the time of resonance in the longitudinal direction and has either positive or negative stress. The second region has a length of a half wavelength or less of the stress distribution and has either positive or negative stress. First and second electrode are respectively disposed on the first and second main faces in the first primary-side region, and the substrate between the first and second electrodes is polarized in the thicknesswise direction. Third and fourth electrodes are respectively disposed on the first and second main faces in the second primary-side region, and the substrate between the third and fourth electrodes is polarized in the thicknesswise direction. A secondary-side electrode is disposed in the secondary-side region, and the secondary-side region is polarized in the longitudinal direction. Directions of polarization and stress of the first and second regions and the electrical connection among the first to fourth electrode are determined in order for the second region to enhance the resonance of the substrate excited by the first region.
    • 压电变压器具有具有第一和第二主面的压电基板。 基板沿其纵向方向依次具有第一和第二初级侧区域和次级侧区域。 第一区域在纵向共振时具有应力分布的半波长的长度,并且具有正应力或负应力。 第二区域具有应力分布的半波长或更小的长度,并且具有正应力或负应力。 第一和第二电极分别设置在第一初级侧区域中的第一和第二主面上,并且第一和第二电极之间的衬底沿厚度方向极化。 第三和第四电极分别设置在第二初级侧区域中的第一和第二主面上,并且第三和第四电极之间的衬底沿厚度方向极化。 次级侧电极设置在次级侧区域中,次级侧区域在长度方向上极化。 确定第一和第二区域的极化和应力方向以及第一至第四电极之间的电连接的顺序,以使第二区域增强由第一区域激发的衬底的共振。
    • 7. 发明授权
    • Piezoelectric transformer
    • 压电变压器
    • US5929554A
    • 1999-07-27
    • US887277
    • 1997-07-02
    • Kouichi KanayamaNobuhiro Maruko
    • Kouichi KanayamaNobuhiro Maruko
    • H01L41/107H01L41/08
    • H01L41/107
    • A piezoelectric transformer has a piezoelectric substrate having first and second main faces. The substrate has first and second primary-side regions and a secondary-side region in its longitudinal direction in this order. The first region has a length of a half wavelength of stress distribution at the time of resonance in the longitudinal direction and has either positive or negative stress. The second region has a length of a half wavelength or less of the stress distribution and has either positive or negative stress. First and second electrode are respectively disposed on the first and second main faces in the first primary-side region, and the substrate between the first and second electrodes is polarized in the thicknesswise direction. Third and fourth electrodes are respectively disposed on the first and second main faces in the second primary-side region, and the substrate between the third and fourth electrodes is polarized in the thicknesswise direction. A secondary-side electrode is disposed in the secondary-side region, and the secondary-side region is polarized in the longitudinal direction. Directions of polarization and stress of the first and second regions and the electrical connection among the first to fourth electrode are determined in order for the second region to enhance the resonance of the substrate excited by the first region.
    • 压电变压器具有具有第一和第二主面的压电基板。 基板沿其纵向方向依次具有第一和第二初级侧区域和次级侧区域。 第一区域在纵向共振时具有应力分布的半波长的长度,并且具有正应力或负应力。 第二区域具有应力分布的半波长或更小的长度,并且具有正应力或负应力。 第一和第二电极分别设置在第一初级侧区域中的第一和第二主面上,并且第一和第二电极之间的衬底沿厚度方向极化。 第三和第四电极分别设置在第二初级侧区域中的第一和第二主面上,并且第三和第四电极之间的衬底沿厚度方向极化。 次级侧电极设置在次级侧区域中,次级侧区域在长度方向上极化。 确定第一和第二区域的极化和应力方向以及第一至第四电极之间的电连接的顺序,以使第二区域增强由第一区域激发的衬底的共振。