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    • 7. 发明授权
    • Piezoelectric actuator and method of compensating direction thereof
    • 压电致动器及其补偿方向
    • US06690100B1
    • 2004-02-10
    • US09299470
    • 1999-04-26
    • Keitaro KoroishiHironobu ItohTomoyuki Yoshino
    • Keitaro KoroishiHironobu ItohTomoyuki Yoshino
    • H01L4108
    • H01L41/047H02N2/16
    • A piezoelectric actuator is formed in a manner which enhances the identifying function of markings provided thereon, and minimizes the influence on the markings when an electrode pattern on the piezoelectric actuator is shifted. The piezoelectric actuator has a piezoelectric element, an electrode pattern formed thereon, and at least one identifying marking formed on the electrode pattern, each identifying marking having a shape comprising multiple sides and being formed at a specific location of the electrode pattern for use in identifying a characteristic of the electrode pattern. In one embodiment, the piezoelectric element has a disk shape, the electrode pattern comprises a plurality of electrodes provided on an inner side of the piezoelectric element, selected electrodes being connected to each other in a desired pattern, and the identifying marking is formed on the electrode pattern proximate a peripheral edge of the piezoelectric-element and has at least three straight sides so that the area of the identifying marking is based on the length of its sides rather than a radius. Thus, shifting of the identifying marking with respect to the curved peripheral edge of the disk-shaped piezoelectric element results in reduction in area of the identifying marking on a linear basis rather than based on a squared value of a radius. In another embodiment, a plurality of identifying markings are arranged in a spaced-apart relation on the piezoelectric element.
    • 压电致动器以增强其上提供的标记的识别功能的方式形成,并且当压电致动器上的电极图案偏移时,对标记的影响最小化。 压电致动器具有压电元件,形成在其上的电极图案和形成在电极图案上的至少一个识别标记,每个识别标记具有包括多个边的形状并形成在电极图案的特定位置,用于识别 电极图案的特性。 在一个实施例中,压电元件具有盘形状,电极图案包括设置在压电元件内侧的多个电极,所选择的电极以期望的图案彼此连接,识别标记形成在 电极图案接近压电元件的周边边缘并且具有至少三个直边,使得识别标记的面积基于其侧面的长度而不是半径。 因此,识别标记相对于盘形压电元件的弯曲周缘移动导致识别标记的面积在线性基础上而不是基于半径的平方值的减小。 在另一个实施例中,多个识别标记在压电元件上以间隔开的关系布置。