07583901 is referenced by 199 patents and cites 50 patents.

The present invention has been developed considering the above-described problems and aims to provide various structures and applications for illuminative light communication. According to the first aspect of the prevent invention, a broadcast system includes an LED light source 115 for lighting, a power line 103 that supplies electric power to the LED light source 115, a data modulator 102 that modulates and multiplexes a plurality of pieces of data, superimposes the resulting signal on an electric power waveform, and then transmits the resulting superimposed signal waveform to the power line 103, and a filter 112 that selectively separates one or more of a plurality of pieces of modulated data on the power line so as to control light intensity or blinking of the LED light source. Data is transmitted through changes in light intensity or blinking of the LED light source.

Title
Illuminative light communication device
Application Number
10/532250
Publication Number
7583901 (B2)
Application Date
October 23, 2003
Publication Date
September 1, 2009
Inventor
Yasuo Sugawara
Kanagawa
JP
Shogo Kitano
Tokyo
JP
Yasuhiro Koike
Kanagawa
JP
Takaaki Ishigure
Kanagawa
JP
Shinichiro Haruyama
Kanagawa
JP
Toshihiko Komine
Shizuoka
JP
Masao Nakagawa
Kanagawa
JP
Agent
Rader Fishman & Grauer PLLC
Assignee
Nakagawa Laboratories
JP
IPC
H04B 10/04
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