Piezoelectric transformer

US6060819A · kind A · utility

Assignee

• NEC CORPORATION · JP

Inventors

• Satoru Tagami · Tokyo, JP
• Koichi Zama · Sagamihara, JP
• Tsuyoshi Kitami · Tokyo, JP
• Hiromi Suzuki · Tokyo, JP
• Takayuki Inoi · Tokyo, JP

Key dates

• Filing date: Jun 11, 1997
• Grant date: May 9, 2000
• Expiry date: Jun 11, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/40

Abstract

A piezoelectric transformer includes strip form electrodes on opposing upper and lower surfaces of a piezoelectric ceramic plate formed by screen printing using a conductive paste. By using strip form electrodes, discharge of a driving portion during polarization, degradation of reliability of mechanical strength due to excessive stress in a power generating portion during polarization, and instability of transformer output due to breakage of the electrode is prevented.