JPH09266599A

JPH09266599A - Digital speaker

Info

Publication number: JPH09266599A
Application number: JP11108396A
Authority: JP
Inventors: Takeshi Shiraiwa; 健白岩
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-27
Filing date: 1996-03-27
Publication date: 1997-10-07

Abstract

PROBLEM TO BE SOLVED: To directly output an acoustic or musical electric signal while keeping it as a digital signal by directly applying the digital signal to a speaker. SOLUTION: Electrodes 1 are concentrically arranged, and the respective electrodes 1 are electrically insulated. A voltage corresponding to the bit of a binary number is impressed to each electrode 1. The area of each concentric circle composed of electrodes 1 is decided corresponding to the level of a digit in the bit of the binary number partially charged to each circle. Besides, electrodes 3 are made into one plane. The electrodes 1 and 3 are composed of conductors such as metal. The electrodes are provided on a dielectric 2 having a piezoelectric effect.

Description

【発明の詳細な説明】この発明は音声、音響、音楽などの電気信号をデジタル
信号のまま直接出力するスピーカである。従来のスピー
カはアナログ信号を通常コイル式の駆動部に加え駆動す
るものが主流であった。従来の方法だと過渡特性を向上
させるのが困難であり、デジタル処理で雑音が入り込ま
ない処理をおこなっても最終的にスピーカによる出力段
で音に色付けがされてしまいこの点が問題であった。本
発明ではアナログ信号ではなくデジタル信号を直接スピ
ーカに加えることにより従来の問題点を解決したもので
ある。以下にそれを説明すると、（イ）図１で、電極１は同心円状に配置されている。DETAILED DESCRIPTION OF THE INVENTION The present invention is a speaker that directly outputs an electrical signal such as voice, sound, or music as a digital signal. Most of the conventional speakers are those that drive by adding an analog signal to a normal coil type driving unit. With the conventional method, it is difficult to improve the transient characteristics, and even if noise is not entered by digital processing, the sound is finally colored at the output stage of the speaker, which is a problem. . The present invention solves the conventional problems by directly applying a digital signal to the speaker instead of an analog signal. This will be described below. (A) In FIG. 1, the electrodes 1 are arranged concentrically.

（ロ）同心円状の電極１のそれぞれは電気的に絶縁され
ている。(B) Each of the concentric electrodes 1 is electrically insulated.

（ハ）同心円状の電極１のそれぞれは２進数の数値のビ
ットに応じた電圧が加えられる。(C) A voltage corresponding to a bit of a binary number is applied to each of the concentric electrodes 1.

（ニ）電極１の各同心円はそれぞれその円が受け持つ２
進数のビットの桁の大きさに応じて面積が決まる。また
は、加える電気信号の強さにより、各ビットの音量を調
整してもよい。(D) Each concentric circle of the electrode 1 is assigned to that circle. 2
The area is determined according to the size of the digit of the decimal number. Alternatively, the volume of each bit may be adjusted according to the strength of the electric signal to be added.

（ホ）電極２は１つの面になっている。(E) The electrode 2 has one surface.

（ヘ）電極１、２は金属などの導電体で出来ている。(F) The electrodes 1 and 2 are made of a conductor such as metal.

（ト）電極は、蒸着、メッキ、ＭＢＥ、スパッタリン
グ、液相エピタキシーなどの、一般的な金属薄膜の形成
法で形成してもよい。The (g) electrode may be formed by a general metal thin film forming method such as vapor deposition, plating, MBE, sputtering, and liquid phase epitaxy.

（チ）誘電体は圧電効果をもった誘電体を用いる。(H) As the dielectric, a dielectric having a piezoelectric effect is used.

[Brief description of drawings]

【図１】本発明の正面図FIG. 1 is a front view of the present invention.

【図２】本発明の断面図FIG. 2 is a sectional view of the present invention.

[Explanation of symbols]

１は電極１２は誘電体３は電極２Ａ−Ａ’
は断面を表す直線1 is an electrode 1 2 is a dielectric 3 is an electrode 2 A-A '
Is a straight line representing the cross section

Claims

[Claims]

1. A speaker which directly outputs electric signals such as voice, sound, and music as digital signals.