Piezoelectric composite device, method of manufacturing same, method of controlling same, input-output device, and electronic device

Abstract

Disclosed herein is a piezoelectric composite device including: a feeding electrode; a common electrode; a signal detecting electrode; a first piezoelectric element joined between the feeding electrode and the common electrode; and a second piezoelectric element joined between the common electrode and the signal detecting electrode; a predetermined voltage being supplied between the feeding electrode and the common electrode; and a force detection signal based on an external force being extracted from the detecting electrode.

1 . A piezoelectric composite device comprising: 
 a feeding electrode;    a common electrode;    a signal detecting electrode;    a first piezoelectric element joined between said feeding electrode and said common electrode; and    a second piezoelectric element joined between said common electrode and said signal detecting electrode;    wherein a predetermined voltage is supplied between said feeding electrode and said common electrode; and    wherein a force detection signal based on an external force is extracted from said detecting electrode.    
   
   
       2 . The piezoelectric composite device as claimed in  claim 1 , further comprising a control device connected to each of said feeding electrode, said common electrode, and said signal detecting electrode, 
 wherein said control device supplies power between said feeding electrode and said common electrode according to a preset control signal and detects a force detection signal from said signal detecting electrode.    
   
   
       3 . A method of manufacturing a piezoelectric composite device, comprising the steps of: 
 joining a first piezoelectric element between a feeding electrode and a common electrode;    joining a second piezoelectric element between a signal detecting electrode and said common electrode;    connecting leads for supplying a predetermined voltage to each of said feeding electrode and said common electrode; and    connecting leads for extracting a force detection signal based on an external force to each of said common electrode and said signal detecting electrode.    
   
   
       4 . A method of controlling a piezoelectric composite device, said piezoelectric composite device including a feeding electrode, a common electrode, a signal detecting electrode, a first piezoelectric element joined between said feeding electrode and said common electrode, and a second piezoelectric element joined between said common electrode and said signal detecting electrode, 
 wherein a control device connected to each of said feeding electrode, said common electrode, and said signal detecting electrode is provided; 
 wherein said control device supplies power between said feeding electrode and said common electrode according to a preset control signal and detects a force detection signal from said signal detecting electrode.  
   
   
   
       5 . An input-output device comprising: 
 input means for detecting a contact position of an operating object and outputting input information; and    tactile sense providing and information determining means for providing a tactile sense to said operating object operating said input means, and detecting a force at the contact position of said operating object and determining said input information;    wherein said tactile sense providing and information determining means includes a piezoelectric composite device; 
 wherein said piezoelectric composite device includes:  
 a feeding electrode;  
 a common electrode;  
 a signal detecting electrode;  
 a first piezoelectric element joined between said feeding electrode and said common electrode; and  
 a second piezoelectric element joined between said common electrode and said signal detecting electrode;  
 wherein a predetermined voltage is supplied between said feeding electrode and said common electrode; and  
 wherein a force detection signal based on an external force is extracted from said signal detecting electrode.  
   
   
   
       6 . The input-output device as claimed in  claim 5 , further comprising a control device connected to each of said feeding electrode, said common electrode, and said signal detecting electrode, 
 wherein said control device supplies power between said feeding electrode and said common electrode according to a preset control signal and detects a force detection signal from said signal detecting electrode.    
   
   
       7 . The input-output device as claimed in  claim 6 , 
 wherein said control device controls feeding to said feeding electrode on a basis of the force detection signal obtained from said signal detecting electrode.    
   
   
       8 . An electronic device comprising: 
 an input-output device, including: 
 input means for detecting a contact position of an operating object and outputting input information; and  
 tactile sense providing and information determining means for providing a tactile sense to said operating object operating said input means, and detecting a force at the contact position of said operating object and determining said input information;  
   wherein said tactile sense providing and information determining means of said input-output device includes a piezoelectric composite device; 
 wherein said piezoelectric composite device including:  
 a feeding electrode;  
 a common electrode;  
 a signal detecting electrode;  
 a first piezoelectric element joined between said feeding electrode and said common electrode; and  
 a second piezoelectric element joined between said common electrode and said signal detecting electrode;  
 wherein a predetermined voltage being supplied between said feeding electrode and said common electrode; and  
 wherein a force detection signal based on an external force being extracted from said detecting electrode.  
   
   
   
       9 . The electronic device as claimed in  claim 8 , further comprising a control device connected to each of said feeding electrode, said common electrode, and said signal detecting electrode, 
 wherein said control device supplies power between said feeding electrode and said common electrode according to a preset control signal and detects a force detection signal from said signal detecting electrode.    
   
   
       10 . The electronic device as claimed in  claim 9 , 
 wherein said control device controls feeding to said feeding electrode on a basis of the force detection signal obtained from said signal detecting electrode.    
   
   
       11 . The electronic device as claimed in  claim 9 , further comprising display means for displaying said input information, 
 wherein said control device detects a force of the operating object selecting an input item displayed by said display means, and determines that said input item is selected on a basis of the detected force of said operating object.    
   
   
       12 . The electronic device as claimed in  claim 11 , 
 wherein said control device determines that said input item is selected on a basis of the force detection signal obtained from said signal detecting electrode, and then gives a tactile stimulus to said operating object by controlling feeding to said feeding electrode.    
   
   
       13 . A piezoelectric composite device comprising: 
 a first laminate and a second laminate formed by laminating a lead electrode and one or more piezoelectric elements; and    a third laminate having another lead electrode, and having one or more piezoelectric elements laminated between said first laminate and said second laminate.    
   
   
       14 . The piezoelectric composite device as claimed in  claim 13 , 
 wherein when power is supplied to the lead electrodes of said first laminate and said second laminate, the piezoelectric elements of said first laminate and said second laminate vibrate; and    wherein when a force is applied to said third laminate, the one or more piezoelectric elements of said third laminate output a force detection signal from the lead electrode of said third laminate.    
   
   
       15 . The piezoelectric composite device as claimed in  claim 13 , further comprising a control device connected to the lead electrode of each of said first laminate, said second laminate, and said third laminate, 
 wherein said control device supplies power to the lead electrode of each of said first laminate and said second laminate according to a preset control signal, and supplies power to the lead electrode of said third laminate or detects a force detection signal from the lead electrode of said third laminate.    
   
   
       16 . A method of manufacturing a piezoelectric composite device, comprising the steps of: 
 forming a laminate by one or more piezoelectric elements and electrodes;    electrically dividing said laminate to demarcate at least three laminates;    drawing out electrodes from a piezoelectric element situated in a central laminate of the demarcated said laminates; and    drawing out electrodes from piezoelectric elements of the other laminates situated on both sides of said central laminate.    
   
   
       17 . The method of manufacturing a piezoelectric composite device as claimed in  claim 16 , 
 wherein at least one electrode is drawn out from said central laminate.    
   
   
       18 . A method of controlling a piezoelectric composite device, said piezoelectric composite device including a first laminate and a second laminate formed by laminating a lead electrode and one or more piezoelectric elements, and a third laminate having another lead electrode, and having one or more piezoelectric elements and lead electrodes laminated between said first laminate and said second laminate, 
 wherein a control device connected to the lead electrode of each of said first laminate, said second laminate, and said third laminate is provided; 
 wherein said control device supplies power to the lead electrode of each of said first laminate and said second laminate according to a preset control signal, and supplies power to the lead electrode of said third laminate or detects a force detection signal from the lead electrode of said third laminate.  
   
   
   
       19 . The method of controlling a piezoelectric composite device as claimed in  claim 18 , 
 wherein said first laminate and said second laminate are controlled as an actuator.    
   
   
       20 . An input-output device comprising: 
 input means for detecting a contact position of an operating object and outputting input information; and    tactile sense providing and information determining means for providing a tactile sense to said operating object operating said input means, and detecting a force at the contact position of said operating object and determining said input information;    wherein said tactile sense providing and information determining means includes a piezoelectric composite device; 
 wherein said piezoelectric composite device includes:  
 a first laminate and a second laminate formed by laminating a lead electrode and one or more piezoelectric elements; and  
 a third laminate having another lead electrode and having one or more piezoelectric elements laminated between said first laminate and said second laminate.  
   
   
   
       21 . The input-output device as claimed in  claim 20 , 
 wherein when power is supplied to the lead electrodes of said first laminate and said second laminate, the piezoelectric elements of said first laminate and said second laminate vibrate; and    wherein when a force is applied to said third laminate, the one or more piezoelectric elements of said third laminate output a force detection signal from the lead electrode of said third laminate.    
   
   
       22 . The input-output device as claimed in  claim 20 , further comprising a control device connected to the lead electrode of each of said first laminate, said second laminate, and said third laminate, 
 wherein said control device supplies power to the lead electrode of each of said first laminate and said second laminate according to a preset control signal, and supplies power to the lead electrode of said third laminate or detects a force detection signal from the lead electrode of said third laminate.    
   
   
       23 . The input-output device as claimed in  claim 22 , 
 wherein said control device controls feeding to the lead electrodes of said first laminate and said second laminate on a basis of the force detection signal from the lead electrode of said third laminate.    
   
   
       24 . An electronic device comprising: 
 an input-output device, including: 
 input means for detecting a contact position of an operating object and outputting input information; and  
 tactile sense providing and information determining means for providing a tactile sense to said operating object operating said input means, and detecting a force at the contact position of said operating object and determining said input information;  
   wherein said tactile sense providing and information determining means of said input-output device includes a piezoelectric composite device; 
 wherein said piezoelectric composite device includes:  
 a first laminate and a second laminate having a lead electrode and formed by laminating one or more piezoelectric elements, and  
 a third laminate having another lead electrode and having one or more piezoelectric elements laminated between said first laminate and said second laminate.  
   
   
   
       25 . The electronic device as claimed in  claim 24 , 
 wherein when power is supplied to the lead electrodes of said first laminate and said second laminate, the piezoelectric elements of said first laminate and said second laminate vibrate; and    wherein when a force is applied to said third laminate, the one or more piezoelectric elements of said third laminate output a force detection signal from the lead electrode of said third laminate.    
   
   
       26 . The electronic device as claimed in  claim 24 , further comprising a control device connected to the lead electrode of each of said first laminate, said second laminate, and said third laminate, 
 wherein said control device supplies power to the lead electrode of each of said first laminate and said second laminate according to a preset control signal, and detects a force detection signal from the lead electrode of said third laminate.    
   
   
       27 . The electronic device as claimed in  claim 26 , 
 wherein said control device controls feeding to the lead electrodes of said first laminate and said second laminate on a basis of the force detection signal from the lead electrode of said third laminate.    
   
   
       28 . The electronic device as claimed in  claim 26 , further comprising display means for displaying said input information, 
 wherein said control device detects a force of the operating object selecting an input item displayed by said display means, and determines that said input item is selected on a basis of the detected force of the operating object.    
   
   
       29 . The electronic device as claimed in  claim 28 , 
 wherein said control device determines that said input item is selected on a basis of the force detection signal obtained from the lead electrode of said third laminate, and then gives a tactile stimulus to said operating object by controlling feeding to the lead electrodes of said first laminate and said second laminate.    
   
   
       30 . An input-output device comprising: 
 a input section for detecting a contact position of an operating object and outputting input information; and    a tactile sense providing and information determining section for providing a tactile sense to said operating object operating said input section, and detecting a force at the contact position of said operating object and determining said input information;    wherein said tactile sense providing and information determining section includes a piezoelectric composite device; 
 wherein said piezoelectric composite device includes:  
 a feeding electrode;  
 a common electrode;  
 a signal detecting electrode;  
 a first piezoelectric element joined between said feeding electrode and said common electrode; and  
 a second piezoelectric element joined between said common electrode and said signal detecting electrode;  
 wherein a predetermined voltage is supplied between said feeding electrode and said common electrode; and  
 wherein a force detection signal based on an external force is extracted from said signal detecting electrode.  
   
   
   
       31 . An input-output device comprising: 
 a input section for detecting a contact position of an operating object and outputting input information; and    a tactile sense providing and information determining section for providing a tactile sense to said operating object operating said input section, and detecting a force at the contact position of said operating object and determining said input information;    wherein said tactile sense providing and information determining section includes a piezoelectric composite device; 
 wherein said piezoelectric composite device includes:  
 a first laminate and a second laminate formed by laminating a lead electrode and one or more piezoelectric elements; and  
 a third laminate having another lead electrode and having one or more piezoelectric elements laminated between said first laminate and said second laminate.