Illuminative light communication system, lighting device and illuminative light source
First Claim
1. An illuminative light communication system, comprising:
- a plurality of lighting units that emits light for lighting; and
an optical communication unit that optically transmits data through the air to the lighting units;
wherein the lighting units receive light from the optical communication unit, thereby capturing data, and modulate emitted light in accordance with the data.
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Accused Products
Abstract
Information received from a wired network terminal on the wall face, or the like, is delivered as a light signal from a light transmitting/receiving section of a light communication unit. A lighting fixture is provided with a light transmitting/receiving section where light is received from the light communication unit in order to acquire information, and a light emitting element emits illumination light modulated according to that information. A terminal can acquire the information by receiving the illumination light at a light transmitting/receiving section. Since communication is performed from the light communication unit to the terminal by irradiating light into the space, a convenient illumination light communication system requiring no communication cable or laying work of optical fibers can be constructed.
76 Citations
21 Claims
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1. An illuminative light communication system, comprising:
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a plurality of lighting units that emits light for lighting; and an optical communication unit that optically transmits data through the air to the lighting units;
wherein the lighting units receive light from the optical communication unit, thereby capturing data, and modulate emitted light in accordance with the data. - View Dependent Claims (3, 5, 6, 7)
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2. An illuminative light communication system, comprising:
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a plurality of lighting units that emits light for lighting; and an optical communication unit that optically transmits data through the air to one or more of the lighting units;
wherein the one or more of the lighting units receive light from the optical communication unit, thereby capturing data, and optically transmit the data through the air to another lighting unit; and
each lighting unit modulates emitted light in accordance with the data received from the optical communication unit or another lighting unit and transmits the data via the modulated, emitted light. - View Dependent Claims (4)
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8. A lighting device, comprising:
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one or a plurality of illuminative light emitting units that emits light for lighting; an optical transmitting and receiving unit for optically communicating through the air with a light emitting unit provided in a device; and a control unit that controls the illuminative light emitting unit in accordance with data received by the light transmitting and receiving unit, so as to modulate light emitted from the illuminative light emitting unit in accordance with the data, thereby transmitting the data. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An illuminative light source, comprising:
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one or a plurality of illuminative light emitting devices that emits light for lighting; an optical transmitting and receiving unit for optically communicating through the air with a light emitting unit provided in another lighting unit; and a control unit that controls the illuminative light emitting device in accordance with data received by the optical transmitting and receiving unit, so as to modulate light emitted by the illuminative light emitting device in accordance with the data, thereby transmitting the data. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification