Patent application number | Description | Published |
20140159586 | VISIBLE LIGHT COMMUNICATION DEVICE - A variable impedance circuit ( | 06-12-2014 |
20140286645 | LIGHTING FIXTURE AND VISIBLE-LIGHT-COMMUNICATION SYSTEM WITH SAME - A lighting fixture is configured to modulate light intensity of a light source ( | 09-25-2014 |
20140321860 | LIGHTING APPARATUS FOR VISIBLE LIGHT COMMUNICATION, AND VISIBLE LIGHT COMMUNICATION SYSTEM USING THE APPARATUS - A lighting apparatus for visible light communication includes at least one luminaire body and a visible-light-communication-signal-outputting part. The luminaire body includes a light source that includes an LED. The visible-light-communication-signal-outputting part is configured to output a modulation signal to the luminaire body. The luminaire body further includes: a power supply circuit configured to dim the light source; a switch element for modulating an output current that is supplied from the power supply circuit to the light source; a resistor connected in parallel with the switch element; and a photo-coupler configured to receive the modulation signal output from the visible-light-communication-signal-outputting part. The visible-light-communication-signal-outputting part is provided outside the luminaire body, and is configured to transmit the modulation signal via the photo-coupler. | 10-30-2014 |
20140334826 | LIGHTING FIXTURE FOR VISIBLE LIGHT COMMUNICATION AND VISIBLE-LIGHT-COMMUNICATION SYSTEM WITH SAME - A lighting fixture for visible light communication is configured to modulate light intensity of a light source ( | 11-13-2014 |
20150016825 | VISIBLE LIGHT COMMUNICATION DEVICE, LIGHTING FIXTURE INCLUDING THE SAME, AND LIGHTING SYSTEM - The visible light communication device includes a control circuit configured to repeat a transmission process of transmitting a communication signal through modulating an intensity of visible light to be emitted from a light source. The control circuit is configured to, in the transmission process, arbitrarily select a time slot for transmission from a plurality of time slots set within a predetermined time period allocated to the transmission process, and transmit the communication signal in the time slot for transmission. | 01-15-2015 |
20150098708 | VISIBLE LIGHT COMMUNICATION APPARATUS - A visible light communication apparatus includes a constant current circuit and a load circuit including light emitting elements connected to output terminals of the constant current circuit. Further, the visible light communication apparatus includes a load variation circuit configured to change load characteristics of the load circuit by electrically connecting to the load circuit, the load variation circuit including a series circuit of a diode and a resistor connected in series to the load circuit and a switching element configured to electrically connect or disconnect the load variation circuit to the load circuit in response to a binary communication signal. | 04-09-2015 |
20150263808 | ILLUMINATION LIGHT COMMUNICATION APPARATUS AND ILLUMINATION LIGHT COMMUNICATION SYSTEM USING THE SAME - An illumination light communication apparatus includes: a light source; a power supply circuit; a switching element which modulates an output current supplied from the power supply circuit to the light source; a visible light communication signal circuit which controls ON and OFF of the switching element to output a modulating signal for superimposing a visible light beacon signal including a unique ID onto the illumination light emitted from the light source; a control power supply circuit which supplies power to the visible light communication signal circuit; a wireless module which transmits a radio wave beacon signal including a unique ID; and a radio wave beacon controlling and transmitting circuit which controls the radio wave beacon signal transmitted from the wireless module, wherein the radio wave beacon controlling and transmitting circuit is supplied with power from the control power supply circuit. | 09-17-2015 |
20150304029 | VISIBLE LIGHT COMMUNICATION SYSTEM - A controller is configured, by decreasing light quantity in only a first slot that is any one of a plurality of slots into which a unit time is divided equally, and increasing light quantity in all the remaining slots except the first slot of the plurality of slots, to assign information to the first slot of the plurality of slots. The controller is furthermore configured to decrease light quantity in second slots that are three or more continuous slots starting from a head of a preamble, which indicates a frame start point, of a frame of an optical-communication signal and to increase light quantity in a slot immediately before the preamble. | 10-22-2015 |