JP2014107655A - Visible light communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a visible light communication device capable of recognizing confidence of communication security because power consumption can be suppressed and a data communication coverage can be recognized without doing damage to eyes even after receiving visible light.SOLUTION: The visible light communication device includes: a light-emitting section that connects a plurality of light-emitting elements 110 in series; an illumination section that emits illumination light by connecting the plurality of light-emitting sections in parallel; an optical communication section 300 that is connected with at least one or more terminal devices 600 through visible light communication ; and a power supply 400 that supplies electric power to the light-emitting sections and the optical communication section 300. The optical communication section 300 is connected with optional or all of the light-emitting sections.

Description

  The present invention relates to a visible light communication apparatus.

  An optical communication system that transmits information to free space using light has been proposed. The configuration of Patent Document 1 is an ideal ceiling as a light emitting part of an optical space transmission device by transmitting an infrared signal modulated by incorporating an infrared light emitting element in a fluorescent lamp of an illumination means provided on a ceiling or the like. A transmitter can be provided for transmission.

JP-A-6-37720

  Such optical space transmission devices often use infrared rays and cannot be recognized well with the naked eye, so transmission often fails. In addition, since it was not visible light, it was not visible even though strong light was emitted.

  In order to solve the above problem, according to the present invention, in claim 1, a light emitting unit in which a plurality of light emitting elements are connected in series, an illumination unit that emits illumination light by connecting the plurality of light emitting units in parallel, and An optical communication unit connected to one or more terminal devices by visible light communication, and a power source for supplying power to the light emitting unit and the optical communication unit, the optical communication unit being an arbitrary light emitting unit or each light emitting unit It is characterized by being connected to.

  According to a second aspect of the present invention, the optical communication unit is connected in series with the light emitting unit, and according to a third aspect, the optical communication unit is connected in series with the light emitting unit. Furthermore, in claim 4, the illumination unit and the optical communication unit are connected to a power source through a rectifier circuit.

  Further, in claim 5, the optical communication unit is configured to receive an optical signal transmitted from the terminal communication unit provided in the terminal device, and an optical signal received by the terminal reception unit provided in the terminal device. And a transmitter for transmitting.

  According to the above configuration, the present invention can be recognized with the naked eye without damaging the eyes by applying visible light to the light source. Further, visible light can reduce power consumption more than infrared rays.

1 is a schematic diagram of a visible light communication device of the present invention. Schematic of the other visible light communication apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic diagram of a visible light communication apparatus of the present invention. As shown in FIG. 1, it includes a light emitting unit 100, an illumination unit 200, an optical communication unit 300, and a power source 400.

  The light emitting unit 100 is formed by connecting a plurality of light emitting elements 110 in series. Specifically, the light emitting element 110 is an LED element. The illumination unit 200 serves as a light source of illumination light that illuminates the room, and is obtained by connecting a plurality of light emitting units 100 in parallel. In the embodiment, only three light emitting units 100 are illustrated, but the present invention is not limited to this, and four or more light emitting units 100 may be arranged.

  The optical communication unit 300 is connected to one or more terminal devices 600 by visible light communication, and includes a receiving unit 310 that receives an optical signal transmitted from a terminal transmission unit 620 provided in the terminal device 600. , And a transmitter 320 that transmits an optical signal received by the terminal receiver 610 provided in the terminal device 600.

  The receiver 310 is specifically a phototransistor, and the transmitter 320 is an LED light emitting element that transmits an optical signal. The transmission unit 320 is connected to the oscillation unit 330. The oscillating unit 330 generates a modulation signal for lighting an optical signal transmitted to the terminal receiving unit 610 of the terminal device 600 with a lighting duty smaller than the lighting time region width of the LED light emitting element.

  The terminal device 600 is a device that can communicate indoors, and is, for example, an information device such as a notebook computer, a desktop computer, a tablet PC, or a mobile phone.

  The terminal device 600 includes a terminal reception unit 610 and a terminal transmission unit 620 so that each optical communication unit 300 can perform bidirectional communication. Furthermore, the terminal transmitter 620 is composed of an LED light emitting element that transmits an optical signal, and is connected to the terminal oscillator 630 in the same manner as the transmitter 320 described above.

  The terminal oscillating unit 630 generates a modulation signal for lighting an optical signal transmitted to the receiving unit 310 with a lighting duty smaller than the lighting time region width of the LED light emitting element.

  Under this configuration, the optical signal received by the terminal receiving unit 610 from the transmitting unit 320 is subjected to data processing S1, and desired internal processing S2 is performed in the terminal device. When the internally processed data is sent to the receiving unit 310, in S4, the internally processed data in the terminal device is converted into an optical signal by the terminal oscillating unit 630, and the signal is received by the receiving unit 310. .

  The received optical signal is temporarily processed by the receiving unit 310. Thereafter, the processed data is converted into an optical signal by the oscillating unit 330, and the converted optical signal is transmitted to an arbitrary terminal device 600 in the room via the transmitting unit 320. In this manner, bidirectional communication is possible between the communication unit 300 and the terminal device 600.

  The power source 400 supplies power to the light emitting unit 100 and the optical communication unit 300, and the illumination unit 200 and the optical communication unit 300 are connected to the power source 400 via the clear current circuit 500. The optical communication unit 300 is incorporated in the illumination unit 200, an LED light emitting element that is a transmission unit 320 of the optical communication unit 300 becomes a part of the illumination unit 200, and the power supply of the optical communication unit 300 is supplied to the illumination unit 200. The power supply 400 is shared.

  Thereby, it is not necessary to separately provide the power supply 400 of the illumination unit 200 and the power supply 400 of the optical communication unit 300. In FIG. 1, the communication unit is connected in series to the illumination unit 200, but the communication unit is not limited to this. For example, as illustrated in FIG. 2, the communication unit is connected in parallel to the illumination unit 200. Also good.

  Even if one of the light emitting units 100 of a specific lighting unit 200 is broken by this connection, power is supplied to the optical communication unit 300 connected to the lighting unit 200, and the optical communication unit 300 and the terminal are normally connected. Optical transmission / reception with the apparatus 600 can be performed. As shown in FIGS. 1 and 2, the optical communication unit 300 is connected to each illumination unit 200, but is not limited to this, and in FIG. 1, the optical communication unit 300 is an arbitrary light emitting unit. The optical communication unit 300 may be connected to an arbitrary lighting unit 200 in FIG.

DESCRIPTION OF SYMBOLS 100 Light emission part 110 Light emitting element 200 Illumination part 300 Optical communication part 310 Reception part 320 Transmission part 400 Power supply 500 Rectifier circuit

Claims (5)

A light-emitting unit in which a plurality of light-emitting elements are connected in series; an illumination unit that emits illumination light by connecting the plurality of light-emitting units in parallel; an optical communication unit that is connected to one or more terminal devices by visible light communication; A power supply for supplying power to the light emitting unit and the optical communication unit;
The said communication part is connected to arbitrary said light emission parts or each said light emission part, The visible light communication apparatus characterized by the above-mentioned.   The visible light communication apparatus according to claim 1, wherein the communication unit is connected in series to the light emitting unit.   The visible light communication apparatus according to claim 1, wherein the communication unit is connected in series to the light emitting unit.   The visible light communication device according to claim 1, wherein the illumination unit and the optical communication unit are connected to a power source via a rectifier circuit.   The communication unit includes a receiver that receives an optical signal transmitted from a terminal transmitter provided in the terminal device, and a transmitter that transmits an optical signal received by the terminal receiver provided in the terminal device. The visible light communication device according to claim 1, wherein the visible light communication device is provided.

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