Industrial Technology Research Institute

National Science Council of Republic of China

Minsun Ouyang

Tzuan-Ren Jeng

Jau-Jiu Ju

Chi-Lone Chang

Yung-Sung Lan

Ching-Hsing Huang

Yu-Hsiu Chang

Yu-Chien Huang

Chen-Yuan Huang

Hsiang-Chieh Yu

Fuh-Liang Wen

An optical head driving mechanism is applied to an optical disc driver that has a base plate, a pair of guide rods and an optical module movably mounted on the guide rods. The driving mechanism includes a base, a movable member, a piezo-actuator and at least a resilient member. The piezo-actuator and the movable member generate proceeding waves at the rim of the piezo-actuator and move the optical module along the guide rods when the piezo-actuator activates.

Driving mechanism for optical head of optical disc driver

This specification discloses a piezoelectric ultrasonic motor with multi-layer thin disks. A buzzer disk made of a piezoelectric material is supplied with an alternate voltage to produce alternately expanding and shrinking deformation. An elastic vibration disk in connection with the buzzer disk produces standing waves to transport kinetic energy to the exterior. A driving module symmetric in the vertical or horizontal direction is also formed. This does not only reduce the abrasion among the components, but also provide homogeneous forward and reverse driving forces.

Piezoelectric ultrasonic motor with multi-layer thin disks

A thin-disc piezoelectric actuating ultrasonic motor includes a stator made up of a commercially available piezoelectric element that includes a piezoelectric ceramic membrane bonded on a metal plate to form a concentric disk. An ultrasonic motor driving mechanism induces mechanical vibration in the piezoelectric element by extension and shrinkage of the metal back plate, upon application of single phase AC power. There are two propagating directions in the induced mechanical vibrating wave. One is a radial component, and the other is a transverse component. The outer edge of the piezoelectric element thus forms traveling waves in different directions. These traveling waves may be used to provide a torque so as to drive the rotor to rotate.

Thin-disc piezoelectric actuating ultrasonic motor

Growing community of inventors

Hsinchu, Taiwan

Minsun Ouyang