Tdk Corporation

Taiyo Yuden Co., Ltd.

Yuichi Namikawa

Hiroyuki Shimizu

Takayuki Goto

Kenji Yamaga

Shigeo Ishii

Sumiaki Kishimoto

Yoshimi Sakai

Atsushi Koyama

Seiki Shimazu

A driving device generates a driving signal and outputs the driving signal to a piezoelectric element, the driving signal having a waveform obtained by using, as a first modulated wave, a first low-frequency wave having a frequency of 1 Hz or more and less than 100 Hz, using, as a second modulated wave, a waveform obtained by modulating an amplitude of a second low-frequency wave having a frequency of 100 Hz or more and 300 Hz or less with the first modulated wave, and modulating a high-frequency wave having a frequency of 20 kHz or more and 100 kHz or less with the second modulated wave.

Driving device, tactile sensation providing apparatus, and driving method

Provided is a driving apparatus that sets a signal wave in a low-frequency region having a frequency of 10 Hz or more and 250 Hz or less as a modulating wave and outputs to a piezoelectric actuator a driving signal having a waveform obtained by modulating an amplitude of a sine wave in a high-frequency region having a frequency of 20 kHz or more and 40 kHz or less with the modulating wave.

Driving apparatus, vibration generating apparatus, electronic apparatus, and driving method

A method of making a plurality of optical record disc substrates includes the steps of injecting a resin material into a plurality of disc-shaped cavities which are formed by closing a fixed mold half and a movable mold half; and cooling the injected resin material in the cavities. The cavities are grouped into a plurality of groups so that each group includes not less than one cavity, and each group is provided with a common actuation device so that each actuation device is independently operated.

Apparatus for making a plurality of optical record disc subtrates

Method of making a plurality of optical record disc substrates

Growing community of inventors

Tokyo, Japan

Yuichi Namikawa