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Piezoelectric actuator drive system

A piezoelectric actuator and driving system technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem that piezoelectric actuators cannot be selectively driven actuators, the inability to apply front or rear drive piezoelectric actuators, etc.

Inactive Publication Date: 2006-03-29
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the above-mentioned conventional piezoelectric actuator driving circuit has disadvantages in that it cannot be applied to drive the piezoelectric actuator front or rear and cannot selectively drive two such piezoelectric actuators.

Method used

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Embodiment Construction

[0033] Now, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements, even if they are described in different drawings.

[0034] figure 2 It is a block diagram showing the structure of the piezoelectric actuator driving system according to the first embodiment of the present invention.

[0035] reference figure 2 The piezoelectric actuator driving system according to the first embodiment of the present invention includes a power supply 100 for supplying operating voltages V1 and V2, an ON selection signal OE for responding to operation, and a forward / backward drive selection signal POL-S. , Controlling the driving controller 201 for generating the forward / backward driving signal Sd of the piezoelectric actuator ACT, the clock generator 300 for generating the first clock signal CLK1 in response to the operating voltage V1...

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Abstract

Disclosed herein is a piezoelectric actuator drive system for forward or backward driving a piezoelectric actuator for zooming and / or focusing in a camera module. The piezoelectric actuator drive system comprises a power supply for supplying an operating voltage, a drive controller for controlling generation of a forward / backward drive signal for a piezoelectric actuator in response to an operation ON select signal and a forward / backward driving select signal, a clock generator for generating a first clock signal in response to the operating voltage from the power supply, and a drive signal generator for generating and supplying the forward or backward drive signal to the piezoelectric actuator in response to the first clock signal from the clock generator and the operating voltage from the power supply under the forward / backward drive signal generation control of the drive controller.

Description

[0001] Related application [0002] The present invention is based on and claims the priority of Korean Patent Application No. 2004-75848 filed on September 22, 2004, the content of which is incorporated herein for reference. Technical field [0003] The present invention relates to a system for driving a piezoelectric actuator used for focusing and / or zooming of camera assemblies used in mobile phones and the like, and more specifically, to a piezoelectric actuator driving system capable of Using the phase shift of the two driving waves forming the driving signal, the piezoelectric actuator for zooming and / or focusing forward or backward in the camera assembly is used, and the piezoelectric actuator is selectively driven, thereby reducing Power consumption and improve efficiency. Background technique [0004] Generally, a piezoelectric actuator is a piezoelectric effect, a transducer used to convert electrical energy into mechanical displacement or stress. These actuators may be,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00
CPCH02N2/147H02N2/0075H02N2/06
Inventor 闵丙云全炯俊金铉振
Owner SAMSUNG ELECTRO MECHANICS CO LTD