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。