| 摘要 |
A device for visually displaying varying two-dimensional vector-type information, such as the frequency and amplitude of an audio signal. The device has an electroluminescent lamp and a supply voltage generator. The supply voltage generator receives an input signal including the vector-type information and provides an alternating supply voltage to the electroluminescent lamp. The amplitude of the supply voltage is representative of one dimension of the information and the frequency of the supply voltage is representative of the other dimension of the information. The first dimension, e.g. the audio signal amplitude, is displayed as a varying brightness of the electroluminescent lamp and the second dimension, e.g. the audio signal frequency, is displayed as a varying colour of the electroluminescent lamp. The device provides a simple, analogue visual display of the information.
|
