Illuminative light communication device
First Claim
1. A broadcast system, comprising:
- an LED light source for lighting;
a power line that supplies electric power to the LED light source;
a data modulator that modulates and multiplexes a plurality of pieces of data, superi mposes the resulting plurality of pieces of data on an electric power waveform into a plurality of modulated pieces of data, and transmits the plurality of modulated pieces of data via the power line; and
a filter that selectively separates one or more pieces of data out of the plurality of modulated pieces of data on the power line and controls light intensity or blinking of the LED light source;
wherein data is transmitted based on changes in light intensity or blinking of the LED light source.
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Accused Products
Abstract
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.
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Citations
9 Claims
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1. A broadcast system, comprising:
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an LED light source for lighting;
a power line that supplies electric power to the LED light source;
a data modulator that modulates and multiplexes a plurality of pieces of data, superi mposes the resulting plurality of pieces of data on an electric power waveform into a plurality of modulated pieces of data, and transmits the plurality of modulated pieces of data via the power line; and
a filter that selectively separates one or more pieces of data out of the plurality of modulated pieces of data on the power line and controls light intensity or blinking of the LED light source;
wherein data is transmitted based on changes in light intensity or blinking of the LED light source. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric bulb, which receives supplied electric power and emits light for lighting, comprising:
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an LED light source for lighting; and
a filter that selectively separates one or more of a plurality of pieces of modulated data, which is superimposed on supplied electric power, and controls light intensity or blinking of the LED light source. - View Dependent Claims (8)
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9-100. -100. (canceled)
Specification