Method for optical data transmission using existing indicator or illumination lamp

• US 20110293286A1
• Filed: 05/25/2010
• Published: 12/01/2011
• Est. Priority Date: 05/25/2010
• Status: Abandoned Application

• Current Assignee: LEDdynamics Incorporated (Shine Minerals Corp.)
• Original Assignee: LEDdynamics Incorporated (Shine Minerals Corp.)
• Inventors: Colwell, Samuel Carl
• Application Number:
  US12/800,966
• Publication Number:
  US 20110293286A1
• Time in Patent Office: Days
• US Class Current: 398/140
• CPC Class Codes: H04B 10/116 Visible light communication

Abstract

A method is described for the transmission of data using LEDs or other light sources without interfering with the standard use of the lighting source.

Claims

1. A method which allows data to be transmitted optically through an LED or other light source without interfering with the normal use of the light source, comprising

a current shunting device;

a control signal input for the data stream.

2. The method of claim 1 for making the data transmission not visually detectable.

3. The method of claim 1 for making the optical data detectable by a wide range of available photo detectors.

4. The method of claim 1 using a constant voltage power source.

5. The method of claim 1 using a constant current power source.

6. The method of claim 1 using MOSFET transistor as a shunt switching device.

7. The method of claim 1, using a bipolar transistor as a shunt switching device.

8. The method of claim 1 shunting a single LED.

9. The method of claim 1 shunting one of a multiplicity of LEDs.

10. The method of claim 1 transmitting data using a protocol that provides a fixed percentage on/off ration (duty cycle), such as Frequency Shift Keying, Manchester Encoding, Phase Shift Keying, Pulse Position Modulation, etc.

11. The method of claim 1 added to an existing product that uses an LED or other light emitting source as either an indicator or illumination source.

12. The method of claim 1 used to transmit data using a light emitting source which operates normally as a power indicator.

13. The method of claim 1 used to transmit data using a light emitting source which operated normally as a source of illumination.

14. The method of claim 1 used to transmit data using a light emitting source which normally operates as a light source for a back-lit LCD screen.