Browse Prior Art Database

REMOTE CONTROL UNIT USING VISIBLE LIGHT

IP.com Disclosure Number: IPCOM000008786D
Original Publication Date: 1998-Sep-01
Included in the Prior Art Database: 2002-Jul-12
Document File: 2 page(s) / 79K

Publishing Venue

Motorola

Related People

Hans-Peter Herzig: AUTHOR

Abstract

Visible light is used to control different electron- ic devices in a room. The user aims a hand-held transmitter at the device and presses a button on the transmitter. trolled. The detector decodes the modulation and generates an electrical signal. The signal can be used to change the status of a Flip-Flop.

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MOTOROLA Technical Developments

REMOTE CONTROL UNIT USING VISIBLE LIGHT

by Hans-Peter Herzig

ABSTRACT

  Visible light is used to control different electron- ic devices in a room. The user aims a hand-held transmitter at the device and presses a button on the transmitter.

trolled. The detector decodes the modulation and generates an electrical signal. The signal can be used to change the status of a Flip-Flop.

  To implement more functionality, different mod- ulation frequencies can be used. The detector distin- guishes between the frequencies and generates dif- ferent signals for the controlled device.

  A typical application would be spotlights mounted on the ceiling of a room. Each spotlight is equipped with a detector. Aiming at a detector with the transmitter will turn the spotlight on or off. This way all spots can be controlled from any location in the room from which the detector can be seen directly. New spots can be added without having to install switches in the room. Control of the lig;hts becomes very convenient. Control of the spot light intensity is possible when different modulation ~fre- quencies are used. One frequency can be used to increase the intensity of the lights, another to dim them. All spots can use the same type of detector. The transmitter only has to have one or two buttons for the arrangement where the lights can be dimmed.

  Other devices that could be controlled in a simi- lar fashion are: ceiling fans, speakers, monitors, shades, etc...