公开(公告)号：US5777425A

公开(公告)日：1998-07-07

申请号：US707144

申请日：1996-09-03

申请人： Yoshihiro Ino ,  Tetsuo Yoshida ,  Yoshiaki Fuda ,  Naoki Wako ,  Katsunori Kumasaka ,  Hutoshi Shiotani

发明人： Yoshihiro Ino ,  Tetsuo Yoshida ,  Yoshiaki Fuda ,  Naoki Wako ,  Katsunori Kumasaka ,  Hutoshi Shiotani

IPC分类号： H01L41/107 ,  H02M3/28 ,  H01L41/08

CPC分类号： H02M3/28 ,  H01L41/107

摘要： A piezoelectric transformer comprising a rectangular plate of a piezoelectric material which is polarized in a thickness direction in a first half section of the plate in a longitudinal direction but is polarized in a width direction in a second half section of the remaining half section. A pair of primary electrodes are coated on the upper and the lower surfaces of the first half section and a pair of secondary electrodes are coated on the opposite side surfaces of the second half section, in an alternative structure, the plate is polarized in the thickness direction in opposite end sections of the plate having a size one third of length of the plate and polarized in width direction at the remaining middle section of plate between opposite end sections. The pair of primary electrodes formed on upper and lower surfaces of opposite end sections of plate and pair of secondary electrodes formed on opposite side surfaces of middle section. The pair of secondary electrodes may be deposited on upper or lower surfaces adjacent opposite side edges. In a voltage converter using the piezoelectric transformer, a pulse generator generates two voltage pulse signals having frequency equal to resonance frequency of transformer but being reverse to each other in phase, which signals are applied to primary electrodes, respectively to produce high voltage AC output across secondary electrodes isolated from primary electrodes.

摘要翻译： 一种压电变压器，包括压电材料的矩形板，所述矩形板在所述板的纵向方向上的所述板的第一半部分中沿厚度方向偏振，但在所述剩余的半部的后半部分中沿宽度方向极化。 一对主电极涂覆在第一半部分的上表面和下表面上，并且一对次电极涂覆在第二半部分的相对侧表面上，在替代结构中，该板以厚度 板的相对端部的方向具有板的长度的三分之一并且在相对端部之间的板的剩余中间部分处在宽度方向上极化。 一对初级电极形成在中间部分的相对侧表面上形成的板和一对次级电极的相对端部的上表面和下表面上。 一对辅助电极可以沉积在邻近相对侧边缘的上表面或下表面上。 在使用压电变压器的电压转换器中，脉冲发生器产生两个电压脉冲信号，其频率等于变压器的谐振频率，但是相位相反，这些信号分别施加到主电极，以产生跨越高压交流输出 从主电极隔离的次级电极。

公开(公告)号：US5854543A

公开(公告)日：1998-12-29

申请号：US773969

申请日：1996-12-26

申请人： Hiroyuki Satoh ,  Yoshihiro Ino ,  Hutoshi Shiotani

发明人： Hiroyuki Satoh ,  Yoshihiro Ino ,  Hutoshi Shiotani

IPC分类号： H05B41/282 ,  H05B41/00 ,  H05B37/02

CPC分类号： H05B41/2822

摘要： In an inverter circuit including a piezoelectric transformer (17) for supplying a voltage signal to a cold-cathode tube (50), a driver (12) for driving the piezoelectric transformer, a voltage-controlled oscillator (11) for producing an oscillation pulse voltage signal having an oscillation frequency controlled by a control voltage, a phase difference detection circuit (15) for detecting as a detected phase difference a phase difference between input and output voltage signals of the piezoelectric transformer, and a control circuit (16) for producing the control voltage so that the detected phase difference is coincident with a predetermined value, a current detection circuit (21) detects as a detected current value a current which flows through the cold-cathode tube. Supplied with the oscillation pulse voltage signal and the detected current value, a power control section (22) controls an electric power of the oscillation pulse voltage signal so that the detected current value has a preselected value. The power control section produces a power-controlled pulse voltage signal and supplies the power-controlled pulse voltage signal to the driver.

摘要翻译： 在包括用于向冷阴极管（50）提供电压信号的压电变压器（17）的逆变器电路中，驱动压电变压器的驱动器（12），用于产生振荡脉冲的压控振荡器 电压信号，其具有由控制电压控制的振荡频率;相位差检测电路（15），用于检测作为检测到的相位差的压电变压器的输入和输出电压信号之间的相位差;以及用于产生 控制电压使检测出的相位差与预定值一致，电流检测电路（21）检测流过冷阴极管的电流作为检测电流值。 提供振荡脉冲电压信号和检测到的电流值，功率控制部分（22）控制振荡脉冲电压信号的电力，使得检测到的电流值具有预选值。 功率控制部分产生功率控制脉冲电压信号，并将功率控制的脉冲电压信号提供给驱动器。