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LED lamp array audio frequency display apparatus and Fourier fuzzy control method therefor

A control method and technology of a display device, which are used in identification devices, lighting devices, instruments, etc.

Inactive Publication Date: 2017-10-31
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems of the above audio display devices, a Fourier fuzzy adaptive control method dedicated to audio changes is designed. The present invention uses a 50*100 LED array to display the spectrum

Method used

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  • LED lamp array audio frequency display apparatus and Fourier fuzzy control method therefor
  • LED lamp array audio frequency display apparatus and Fourier fuzzy control method therefor
  • LED lamp array audio frequency display apparatus and Fourier fuzzy control method therefor

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Embodiment Construction

[0015] Referring to the accompanying drawings, the LED spectrum display of the present invention changes with the audio frequency and its control method is described below. The specific operation is: when the audio signal changes continuously, the amplitudes of different frequency bands of the audio signal change. First, through the addition circuit, the original audio signal voltage is added to a reference voltage, the AC signal is raised, and the negative voltage is raised to zero, so that the alternating current is converted into direct current, and the voltage follower is used to ensure the stability of the reference voltage. After A / D conversion, and then Fourier transform, the frequency amplitude of each frequency band is extracted and compared with the amplitude of each frequency band displayed by the LED lamp spectrum, and the amplitude deviation and deviation change rate of each frequency band can be obtained. Then, after proportional amplification, it is sent to the ...

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Abstract

The invention designs a frequency spectrum display apparatus adopting an LED lamp array display sound signal. Control of lamplight change luminance in LED music frequency spectrum is realized by adopting an adaptive fuzzy control algorithm. An audio signal in a sound playing process is collected in real time, and through Fourier transform, frequencies of various kinds of frequency bands are extracted; next, the extracted frequencies are compared with feedback frequencies, and the comparison difference value and difference value changing ratio are transmitted to an adaptive fuzzy controller; and through the adaptive fuzzy controller, the on-off of each LED lamp is adjusted to realize luminance change, so that the LED frequency spectrum can change luminance rapidly along with sound signal change, the rhyming change can be reflected more accurately, and requirement of accurate display of the amplitude of each frequency band can be satisfied.

Description

technical field [0001] The invention relates to an LED light array audio display device and a display control method. Specifically, a Fourier fuzzy control method is adopted to control the display of the LED light array to quickly follow the change of sound energy, and belongs to the field of smart home. Background technique [0002] The process of LED light array spectrum display changing with the audio signal generally has the characteristics of nonlinearity, high frequency, and large change range. It is a very complicated process of displaying the amplitude of each frequency band in real time. Because the quantitative display of the amplitude of each frequency band is a nonlinear object in this process, it is affected by many factors, so it is difficult to establish a fixed mathematical model that can accurately display the amplitude of each frequency band. There are various spectrum displays at present, but most of them are computer displays and liquid crystal displays...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08G09F9/33H05B44/00
CPCG09F9/33H05B45/00
Inventor 王佐勋曾凡顺张贺龙
Owner QILU UNIV OF TECH