公开(公告)号：US06445369B1

公开(公告)日：2002-09-03

申请号：US09251527

申请日：1999-02-17

申请人： Edward S. Yang ,  Grantham Kwok-Hung Pang ,  Chris Sun-Kin Yeung ,  David Yang ,  Michael Kin-Ming Hong ,  To-On Kwan ,  Chi-Ho Chan ,  Ka-Lim Ho ,  Lawrence Ming-Him Ko

发明人： Edward S. Yang ,  Grantham Kwok-Hung Pang ,  Chris Sun-Kin Yeung ,  David Yang ,  Michael Kin-Ming Hong ,  To-On Kwan ,  Chi-Ho Chan ,  Ka-Lim Ho ,  Lawrence Ming-Him Ko

IPC分类号： G09G332

CPC分类号： H04R27/00 ,  G06F3/147 ,  G09G2380/06 ,  H04B10/1149 ,  H04B10/116 ,  H04B10/502

摘要： A dot matrix display system made up of light emitting diodes (LED's), n which one or more LEDs are modulated and encoded with audio information or messages is disclosed. The system has a LED dot matrix display panel with an interface circuit to a computer, an audio signal transmitter, and a receiver. An executive program runs on the computer for the visual display control of characters, decorative pattern or messages on the display panel. The receiver combined with a speaker is located at a distance from the display panel. The receiver is designed to demodulate the optically transmitted audio information and broadcast the messages with the speaker. The modulation of the LEDs includes a voltage-controlled oscillator (VCO) for varying the frequency of on/off periods of said light emitting diodes. The frequency is high enough such that the perceivable light appears to be constantly illuminated to the human eye.

摘要翻译： 公开了一种由发光二极管（LED）组成的点矩阵显示系统，其中一个或多个LED被调制并用音频信息或消息进行编码。 该系统具有LED点阵显示面板，其具有与计算机，音频信号发射器和接收器的接口电路。 执行程序在计算机上运行，​​用于显示面板上的字符，装饰图案或消息的可视显示控制。 与扬声器结合的接收器位于距显示面板一定距离处。 接收机被设计为解调光学传输的音频信息并且用扬声器广播消息。 LED的调制包括用于改变所述发光二极管的导通/截止周期的频率的压控振荡器（VCO）。 频率足够高，使得可感知的光似乎不断地照亮人眼。