Multi-functional smart led systems with visible light communication and ip-based radiofrequency connectivity

Patent metadata

Field	Value
Publication number	US-2016352422-A1
Application number	US-201415114673-A
Country	US
Kind code	A1
Filing date	Nov 5, 2014
Priority date	Mar 18, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

A communications device includes: a light-emitting diode (LED) or LED array; an internet protocol (IP)-based radiofrequency (RF) wireless unit, configured to transmit and receive data over a RF wireless communications network; a visible light communication (VLC) unit, configured to drive the LED or LED array and modulate light generated by the LED or LED array with data; a control unit, connected to the IP-based RF wireless unit and the VLC unit, configured to facilitate communications between the VLC unit and IP-based RF wireless unit.

First claim

1 . A communications device, comprising:
a light-emitting diode (LED) or LED array; an internet protocol (IP)-based radiofrequency (RF) wireless unit, configured to transmit and receive data over a RF wireless communications network; a visible light communication (VLC) unit, configured to drive the LED or LED array and modulate light generated by the LED or LED array with data; and a control unit, connected to the IP-based RF wireless unit and the VLC unit, configured to facilitate communications between the VLC unit and IP-based RF wireless unit.

2 . The communications device according to claim 1 , wherein the IP-based RF wireless unit utilizes WiFi protocol.

3 . The communications device according to claim 1 , wherein the communications device is configured to broadcast address, position or identity information of the LED device using the LED or LED array.

4 . The communications device according to claim 3 , wherein the communications device is used for an indoor positioning or location-based broadcasting application.

5 . The communications device according to claim 1 , further comprising a non-volatile memory.

6 . The communications device according to claim 1 , further comprising:
an image sensor, configured to send the captured image or video signal to the control unit.

7 . The communications device according to claim 1 , wherein the communications device is configured to broadcast data via VLC using the VLC unit and LED or LED array.

8 . The communications device according to claim 1 , wherein the communications device is configured to transmit data via VLC using the VLC unit and LED or LED array.

9 . The communications device according to claim 1 , wherein the communications device is configured for bi-directional VLC using the VLC unit and LED or LED array.

10 . The communications device according to claim 1 , wherein the control unit comprises a microcontroller.

11 . The communications device according to claim 1 , wherein the control unit is further configured to utilize data received from the RF wireless communications unit to program or control the VLC unit.

12 . The communications device according to claim 11 , wherein the control unit is further configured to utilize the data received from the RF wireless communications unit to set an operating frequency for the VLC unit.

13 . The communications device according to claim 11 , wherein the control unit is further configured to utilize the data received from the RF wireless communications unit to set a light intensity for the VLC unit.

14 . The communications device according to claim 1 , wherein the VLC unit further comprises a LED driver and a VLC modulator.

15 . The communications device according to claim 14 , wherein the VLC unit further comprises a VLC receiver.

16 . A communications device, comprising:
a first communications unit, configured to transmit and receive data over a Non-Line-Of-Sight (NLOS) communications network; a second communications unit, configured to transmit data over a Line-Of-Sight (LOS) wireless communications network; and a control unit, connected to the first and second communications units, configured to facilitate communications between the first and second communications units, and further configured to utilize data received from the NLOS communications network to program or control the second communications unit.

17 . The communications device of claim 16 , wherein the first communications unit is an internet protocol (IP)-based radiofrequency (RF) wireless unit, configured to transmit and receive data over an RF wireless communications network; and the second communications unit is a visible light communication (VLC) unit, configured to drive a light-emitting diode (LED) or LED array and modulate light generated by the LED or LED array with data;

18 . A method for operating a communications device comprising a control unit, an internet protocol (IP)-based radiofrequency (RF) wireless unit and a visible light communication (VLC) unit, the method comprising:
receiving, by the IP-based RF wireless unit of the communications device, data from a RF wireless communications network; processing, by the control unit of the communications device, the received data to control operation of the VLC unit of the communications device; and performing, by the VLC unit of the communications device, VLC transmission based on the received data.

19 . The method of claim 18 , further comprising:
obtaining, by an image sensor corresponding to the communications device, image data; and transmitting, by the communications device, the image data via the IP-based RF wireless unit or the VLC unit of the communications device.

20 . The method according to claim 18 , wherein the VLC transmission is performed via a light-emitting diode (LED) or LED array of the communications device, with the LED or LED array being used to provide illumination or a display.

Assignees

• Univ Hong Kong Science & Tech

Inventors

• Yue Chik Patrick
• Wu Liang

Classifications

• H04B10/116 Primary

  Visible light communication · CPC title

• H04B1/38

  Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04B10/502

  LED transmitters · CPC title

• H04B10/40

  Transceivers · CPC title