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。

公开(公告)号：US06271815B1

公开(公告)日：2001-08-07

申请号：US09251526

申请日：1999-02-17

申请人： Edward S. Yang ,  Yau-Yee Tam ,  Grantham Kwok-Hung Pang ,  Sing-Wai Cheung ,  Kai-Wing Tse ,  Paul Chi-Kong Kwok

发明人： Edward S. Yang ,  Yau-Yee Tam ,  Grantham Kwok-Hung Pang ,  Sing-Wai Cheung ,  Kai-Wing Tse ,  Paul Chi-Kong Kwok

IPC分类号： G09G332

CPC分类号： G06F3/147 ,  G09G3/32

摘要： A handy information display system is disclosed. The system has three main components: a light emitting diodes (LED) array display board, an information server and a portable unit. The LED array display board includes a plurality of light emitting diodes and photodetectors. It can be used to display alphabets, numbers and simple graphics. While it visually gives an effectively stationary message display, the LED can also be modulated to transmit high frequency signals. The modulating frequency should be high enough to be imperceptible by humans. Both message display and signal transmission are controlled by an information server. The system further comprises at least one portable unit. The portable unit is equipped with an optical transceiver and a visual display unit. The optical transceiver can detect the signals transmitted from the LED array display board. The visual display unit then shows the information corresponding to the received signals.

摘要翻译： 公开了一种方便的信息显示系统。 该系统具有三个主要部件：发光二极管（LED）阵列显示板，信息服务器和便携式单元。 LED阵列显示板包括多个发光二极管和光电检测器。 它可以用来显示字母，数字和简单的图形。 虽然它可视化地提供了有效的固定信息显示，但是LED也可以被调制以传输高频信号。 调制频率应该足够高以至于人们不能察觉。 消息显示和信号传输均由信息服务器控制。 该系统还包括至少一个便携式单元。 便携式设备配有光收发器和视觉显示单元。 光收发器可以检测从LED阵列显示板传输的信号。 然后，视觉显示单元显示与接收到的信号相对应的信息。

公开(公告)号：US06683590B1

公开(公告)日：2004-01-27

申请号：US09646649

申请日：2000-11-10

申请人： Grantham Kwok-Hung Pang ,  Edward S. Yang ,  To-On Kwan ,  Chi-Ho Chan ,  Ka-Lim Ho

发明人： Grantham Kwok-Hung Pang ,  Edward S. Yang ,  To-On Kwan ,  Chi-Ho Chan ,  Ka-Lim Ho

IPC分类号： G09G332

CPC分类号： H04B10/1141 ,  G06F3/147 ,  G09G3/32 ,  G09G2300/0443 ,  G09G2352/00 ,  H04B10/116

摘要： A tricolor LED display system (10) is provided having a plurality of multi-color LEDs (22) that operate as concurrent display and data communication elements. These dual-use tricolor LEDs are coupled to a special-purpose computer system (12) and audio signal transmitter (16) for simultaneously controlling the visible display signal from the LEDs, and for modulating audio information onto the visible light signal emitted by the LEDs. A receiver circuit (24) receives the modulated visible light signal from the LEDs and demodulates the received signal to recover the audio information, which is then presented to a user of the system through an audio interface.

摘要翻译： 提供三色LED显示系统（10），其具有作为同时显示和数据通信元件操作的多个多色LED（22）。 这些双用三色LED耦合到专用计算机系统（12）和音频信号发射器（16），用于同时控制来自LED的可见显示信号，并将音频信息调制到由LED发射的可见光信号上 。 接收器电路（24）从LED接收调制的可见光信号并对接收的信号进行解调以恢复音频信息，然后通过音频接口将其提供给系统的用户。