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Driving apparatus, optical apparatus, and driving signal control circuit

A technology for driving signals and driving devices, applied in optics, optical components, installation, etc., can solve problems such as complex action sound control

Inactive Publication Date: 2010-10-27
FUJIFILM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the controls for reducing the sound of motion may become complicated

Method used

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  • Driving apparatus, optical apparatus, and driving signal control circuit
  • Driving apparatus, optical apparatus, and driving signal control circuit
  • Driving apparatus, optical apparatus, and driving signal control circuit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0046] As the imaging device (optical device) having the driving device in the first embodiment, for example, the imaging optical system and the imaging element are relatively moved in a direction perpendicular to the optical axis direction to perform hand-shake correction (vibration prevention). That is, the camera shake is corrected by moving the imaging optical system according to hand shake, and changing the relative position to the imaging element. This imaging device is applied to a camera that captures a still image, a video camera that captures a moving image, an imaging unit mounted in a mobile phone, and the like.

[0047] First, the mechanical structure of an imaging device having a driving device in this embodiment will be described. figure 1 It is an exploded perspective view of an imaging unit and a hand-shake correction mechanism in the imaging device having the driving device according to the first embodiment. Such as figure 1As shown, the imaging device incl...

no. 2 Embodiment approach

[0108] The imaging device having the driving device in the second embodiment has substantially the same configuration as the imaging device in the first embodiment, and only the operation of the first control unit 30 is different from the imaging device in the first embodiment. In addition, in the second embodiment, descriptions of parts that overlap with those of the first embodiment will be omitted, and differences will be mainly described.

[0109] First, the configuration of an imaging device including the driving device in the second embodiment will be described. The first control unit 30 of the drive device in the second embodiment has a function of controlling the application time of the stop control pulse signal. Other functions are the same as those of the first control unit 30 of the first embodiment.

[0110] Next, the anti-vibration operation of the imaging device having the driving device in the second embodiment will be described. Figure 12 It is a flowchart sho...

no. 3 Embodiment approach

[0123] The imaging device having the driving device in the third embodiment has substantially the same configuration as the imaging device having the driving device in the first embodiment, and only the first control unit is compared with the imaging device having the driving device in the first embodiment. 30 moves differently. In addition, in the third embodiment, overlapping parts with the first embodiment or the second embodiment will be omitted, and differences will be mainly described.

[0124] First, the configuration of an imaging device including the driving device in the third embodiment will be described. The first control unit 30 of the drive device in the third embodiment has the function of controlling the application time of the stop control pulse signal, as in the second embodiment. Other functions are the same as those of the first control unit 30 of the first embodiment.

[0125] Next, the anti-vibration operation of the imaging device having the driving de...

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Abstract

A driving apparatus includes a piezoelectric element which undergoes expansion / contraction motion by a driving signal; a driving shaft which is mounted on the piezoelectric element, and undergoes reciprocating movement according to the expansion / contraction motion of the piezoelectric element; a first movement member which is friction-engaged with the driving shaft, and moves due to the reciprocating movement of the driving shaft; and a first control portion which applies driving signals to the piezoelectric element; the first control portion applies driving control pulse signals when the first movement member is to be moved, and applies stop control pulse signals when the stopped first movement member is not to be moved to put the first movement member into a vibration-arrested state. By this means, the stopped first movement member can be smoothly moved, and the first movement member in motion can be smoothly stopped.

Description

technical field [0001] The present invention relates to a drive device for driving a driven part, an optical device with the drive device, and a drive signal control circuit for the drive device. Background technique [0002] Known as a conventional drive device is a drive device that has an actuator that includes a piezoelectric element (electromechanical conversion element) that expands and contracts in accordance with a drive signal, and outputs a drive signal to the actuator to control the actuator. The moving speed of the driving member (for example, refer to Patent Document 1). The driving device described in Patent Document 1 is controlled in the following manner at the start of driving, that is: gradually increasing the time for applying a driving pulse signal to the piezoelectric element, thereby controlling the charge applied to the piezoelectric element to gradually increase the driving speed; Control at the time of stop is such that the time for applying a drive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/02
CPCH02N2/025H02N2/062H02N2/06H02N2/028G02B7/08
Inventor 伊藤久男吉田秀夫永光毅造所哲也重冈幸彦
Owner FUJIFILM CORP
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