A packaged integrated white light source configured for illumination and communication or sensing comprises one or more laser diode devices. An output facet configured on the laser diode device outputs a laser beam of first electromagnetic radiation with a first peak wavelength. The first wavelength from the laser diode provides at least a first carrier channel for a data or sensing signal.

Apparatuses, systems, and methods of communication using visible light communications (VLC) are provided. A system can include a VLC transmitter and a VLC receiver suitable for implementing a diversity combining technique. The diversity combining technique can include equal gain combining, selective best combining, and maximal ratio combining. The VLC transmitter can be a multi-element diversity transmitter and can provide illumination as well as data transfer.

A method of messaging with light is implemented by a light fixture. The method includes: timing and recording a switch-on period, and recording an operation mode of the light fixture during receipt of the electrical power; and operating in a messaging mode the next time the light fixture receives electrical power upon determining that the recorded operation mode is a lighting mode and that the recorded switch-on period is within a predetermined range of time period. In the messaging mode, the light fixture controls a light emitting device to send a binary message by operating in a sequence composed at least of a first brightness state and/or a second brightness state.

The present disclosure provides a device including an interface. By adopting the device with a luminous part arranged at a physical interface, the problem of difficulty in accurately finding a position of the physical interface of the device in a dark environment is solved, so that a user can conveniently and rapidly identify the position and direction of the physical interface, and a user experience is improved.

The present disclosure relates to a wireless communication system of an intelligent unmanned aerial vehicle (UAV), which may perform real-time communication between an intelligent UAV in air or in water and a ground control station by using visible light communication.

Methods, systems, and devices for network communications to reduce optical beat interference (OBI) in upstream communications are described. For example, a fiber node may provide a narrow band seed source to injection lock upstream laser diodes. Therefore, upstream communications from each injection locked laser diode may primarily include the wavelength associated with each seed source. The seed sources may be unique to each end device and configured to minimize OBI. That is, the upstream laser diodes may be generic, but the received seed source may enable upstream communications at varying wavelengths. The fiber node may provide each seed source by filtering (e.g., by a grating filter) a broadband light source.

It discloses a precise locating method of utilizing indoor visible light communication system, which belongs to the field of visible light communication; arranging any number of light emitting diode (LED) lamps indoors, setting the signal transmission power of each LED lamp to be the same and fixing the absolute location of each LED lamp, the terminal required for locating is equipped with several receiving devices, whose relative positions are known, then a position coordinate of the terminal can be obtained by determining the geometric center position of this set of receiving devices through calculating the measured light signal power of the receiving devices on the terminal.

A light emitting element driving semiconductor integrated circuit constitutes at least a part of a light emitting element driving device arranged to drive a series connection unit including a plurality of light emitting elements. The light emitting element driving semiconductor integrated circuit includes a single-element short-circuit detection unit arranged to detect that one of the plurality of light emitting elements is short-circuited, and a control unit arranged to control a power element of the light emitting element driving device so that current supplied from the light emitting element driving device to the series connection unit is increased, when the single-element short-circuit detection circuit detects that one of the plurality of light emitting elements is short-circuited.

The invention discloses a system for the bidirectional communication of digital data through the visible light spectrum, in an unconfined medium which uses two devices for supplying electrical current, regulating the voltage, converting the negative voltage, amplifying the signal, transmitting the signal to an LED, receiving the signal, finally converting the signal and transmitting the digital signal wirelessly to an end device, as specified in the description, and which, as a result of its characteristics of innocuity, privacy, low cost, higher power, savings in energy, interactivity, duality of use and extension of useful life of the devices, has a wide range of use in various fields in the industry such as: health, medicine, the military, education, training, tourism, gadget production, to name just a few.

This invention solves the problems of connection, privacy and frequency amplitude of data transmission that are found in existing connections such as Bluetooth and Wi-Fi.

The present invention pertains to a system and method for operating at least one LED unit of lighting grid comprising a plurality of LED units, wherein the LED units are configured to transmit a VLC signal including a code word. A plurality of user equipment devices captures the light transmitted by the LED unit and determines parameters related to the light, such as a VLC quality parameter, flicker value, light intensity parameter and light colour parameter. Based on these parameters, a controller determines control parameters for the LED unit. As such, a feedback loop is created wherein the LED unit is controlled based on measurements with the user equipment devices.