VISIBLE LIGHT COMMUNICATION SYSTEM - NAKAGAWA KENKYUSHO KK

Title:

VISIBLE LIGHT COMMUNICATION SYSTEM

Document Type and Number:

Japanese Patent JP2007274580

Kind Code:

A

Abstract:

To provide a visible light communication system for enabling stable and reliable uplink communication.

A transmitter and receiver 1 transmits data to a terminal unit 3 by illumination light, and receives data sent from the terminal unit 3 by light. A receiver 2 is connected to a power line 4 as in the transmitter and receiver 1, and receives the data transmitted from the terminal unit 3 by light. The receiver 2 is provided at a position different from that of the transmitter and receiver 1. As a result, if the receiver 2 can receive the light from the terminal unit 3 even if the transmitter and receiver 1 cannot receive the light from the terminal unit 3, communication is enabled. For example, even if light to the transmitter and receiver 1 is blocked and the direction of light from the terminal unit 3 is changed, communication is enabled if the receiver 2 can receive the light, so that stable and reliable communication can be achieved.

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Inventors:

ARITA TAKEMI
HARUYAMA SHINICHIRO
NAKAGAWA MASAO
YAMAGUCHI TAKEHIKO
KOMINE TOSHIHIKO

Application Number:

JP2006100352A

Publication Date:

October 18, 2007

Filing Date:

March 31, 2006

Export Citation:

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Assignee:

NAKAGAWA KENKYUSHO KK

International Classes:

H04B3/54; H04B10/11; H04B10/116; H04B10/118

Domestic Patent References:

JPH11154910A	1999-06-08
JP2004221747A	2004-08-05

Attorney, Agent or Firm:

Masao Yanagisawa

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