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Piezoelectric vibrator with multi acting vibrator

A piezoelectric vibrator, multi-action technology, applied in the field of panel speakers, can solve the problem of increasing the sound pressure of piezoelectric speakers, which is not a practical and effective solution, and achieve the effects of reducing signal distortion, improving energy efficiency, and saving electric energy

Inactive Publication Date: 2007-11-07
IBULE PHOTONICS
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  • Abstract
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Problems solved by technology

However, all these methods are equally not practical and effective solutions for increasing the sound pressure of piezoelectric speakers

Method used

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  • Piezoelectric vibrator with multi acting vibrator
  • Piezoelectric vibrator with multi acting vibrator
  • Piezoelectric vibrator with multi acting vibrator

Examples

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Embodiment Construction

[0033] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like elements are denoted by like numerals.

[0034] 1 is a vertical sectional view and a bottom view of a piezoelectric vibrator having an asymmetric I-shape, which is disclosed in Korean Patent Application No. 2004-70101 filed in the name of the applicant of the present application.

[0035] In the case of the above piezoelectric vibrator, the section taken in the axial direction of the entire vibrator 10 (vertical section thereof) has an asymmetric I-shape. Therefore, the cross-sectional area from the piezoelectric actuator 11 for generating vibration to the first portion 12a of the electric member for transmitting vibration is reduced, so that the amplitude of vibration can be increased. This type of piezoelectric vibrator can generate high sound pressure compared to other conventional piezoelectric vibrators. However, in the ...

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Abstract

The present invention relates to a piezoelectric vibrator, in which a high sound pressure can be achieved over the whole sound range, along with a stereo sound effect, and a simplified piezoelectric panel speaker using the piezoelectric vibrator. The piezoelectric vibrator comprises an elastic member, a multi-acting vibrator for converting an electrical signal into mechanical vibration and formed of a plurality of piezoelectric members, and a vibration transmission elastic member attached to an elastic member of the multi-acting vibrator and for transmitting the mechanical vibration to the outside. Each piezoelectric member is attached to one face of the elastic member and having an electrode attached to both faces thereof. An electrical signal of different frequency band is applied independently to each of the plural piezoelectric members constituting the multi-acting vibrator. In addition, the piezoelectric vibrator has a single layered or multi-layered structure. In case of the multi-layered structure, layers have the same area and shape or different areas and shapes.

Description

technical field [0001] The present invention relates to a piezoelectric vibrator used for piezoelectric panel speakers (panel speakers) and the like. More specifically, the present invention relates to a piezoelectric vibrator having two or more multi acting vibrators in which a plurality of piezoelectric vibrators to which different electric signals having different frequency bands are independently applied are used. component and the geometry of the elastic component connected to the piezoelectric component is specifically designed, thereby obtaining a high sound pressure over the entire sound range with a stereo effect at the same time. The present invention also relates to a simple-configured panel speaker using the piezoelectric vibrator. Background technique [0002] In a conventional piezoelectric speaker, the sound pressure generated by the exciter is low and the resulting resonance frequency is in the range of 3 kHz, making it difficult to obtain high level sound p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/32
CPCB06B1/0603H04R7/04H04R17/00H04R2400/00
Inventor 李相救金世德
Owner IBULE PHOTONICS
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