The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2020
Filed:
Apr. 12, 2017
Dai-ichi Seiko Co., Ltd., Kyoto-shi, Kyoto, JP;
Kenji Ogata, Ogori, JP;
Yoshifumi Ikeda, Ogori, JP;
Shogo Kurogi, Ogori, JP;
Yoshiyuki Watanabe, Takasaki, JP;
DAI-ICHI SEIKO CO., LTD., Kyoto, JP;
Abstract
A piezoelectric driver () includes n piezoelectric layers (A toD) (where n is an integer equal to or greater than 2) that are stacked, with electrode layers (B toD) each interposed between any adjacent piezoelectric layers, and with electrode layers (A andE) further formed underneath the lowermost piezoelectric layer (A) and on top of the uppermost piezoelectric layer (D), and the piezoelectric driver () is bent and displaced in the direction in which the piezoelectric layers are stacked. A signal converter () converts an n-bit digital signal (IS) into n bits of a bit string data signal (BS) comprising of bit data indicating whether a drive voltage to be applied to each of the piezoelectric layers (A toD) via the electrode layers (A toB) is on or off. An output device () outputs, in accordance with values of the individual bits in the bit string data signal (BS) provided through conversion performed by the signal converter (), drive voltages to be applied to the individual piezoelectric layers (A toD).