U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

US Patent Application 20090206699 - Electronic device having piezoelectric pump

Application 20090206699 Filed on February 17, 2009. Published on August 20, 2009

Inventor

Assignee

US Class

310/317Input circuit for mechanical output from piezoelectric element

Attorney, Agent or Firm

Foreign Documents

  • 2008-036410 JP 02/18/2008

International Class

H02N 2/06

Issued Patent Number:

8063533


Abstract text


An electronic device having a piezoelectric pump. The electronic device includes: an audio input section; an audio recording section recording input sound from the audio input section; a piezoelectric pump cooling air by a piezoelectric element; a drive circuit driving the piezoelectric element; and a control circuit monitoring and controlling operation of the audio input section, the audio recording section, and the drive circuit, wherein when an operation mode being monitored is an audio recording mode, in which the input sound is used for recording by the audio recording section, the control circuit controls the drive circuit to decrease the amount of air flow exhausted outside from the piezoelectric pump, and when the operation mode being monitored is another mode without audio recording, the control circuit maintains the amount of the air flow.

PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
 
Sign InRegister
Username  
Password   
forgot password?