Provided is a device, which is a transmission device that can improve performance, that includes: a light source; and a transmitter that generates a modulated signal based on an input signal and transmits the modulated signal from the light source as visible light by changing a luminance of the light source in accordance with the modulated signal. The transmitter includes, in the modulated signal, a plurality of items of information related to service set identifiers (SSIDs) of a plurality of mutually different access points in a wireless local area network (LAN), and transmits the modulated signal from the light source.

A communication terminal based on free space optical communication, a communication device, and a communication system are provided. The communication system includes a communication terminal, communication devices, and a master control device. The first communication device includes a light emitting unit configured to transmit an optical signal and a second switching control unit configured to establish a connection with the communication terminal that has received the optical signal. The communication terminal includes a light receiving unit configured to receive the optical signal transmitted by the first communication device and a first switching control unit configured to set the first communication device as a switching destination according to the optical signal. The master control device includes a third switching control unit configured to receive a switch request containing identification information of the communication terminal and transmit a connection instruction to the first switching control unit according to the switching request.

A modulating circuit is disclosed which includes a switch, wherein the switch comprises a first terminal, a second terminal, a transistor, wherein the transistor comprises a third terminal, and a fourth terminal, a power converter, wherein the power converter comprises a power input, a multiplexer, wherein the multiplexer comprises an output, and a feedback controller, wherein the feedback controller comprises a first output, a third input, and a fourth input, wherein the power input is coupled to the first terminal, wherein the second terminal is coupled to the fourth terminal, wherein the third terminal is coupled to the first output, wherein the third input is coupled to the fourth terminal, wherein the fourth input is coupled to the output.

An immersive experience system is provided. The immersive experience system has a processor that determines a position of a first head-mounted display. Further, the processor determines a position of a second head-mounted display. The processor also generates a first image for a first immersive experience corresponding to the position of the first head-mounted display. Moreover, the process encodes the first image into a first infrared spectrum illumination having a first wavelength. In addition, the processor generates a second image for a second immersive experience corresponding to the position of the second head-mounted display. Finally, the processor encodes the second image into a second infrared spectrum illumination having a second wavelength. The first wavelength is distinct from the second wavelength.

The present disclosure in some embodiments provides a portable information data transmitting device capable of storing at least one piece of information data, and transmitting, by using a plurality of light emitting elements, a visible light signal including a part or all of the information data to a display device positioned within a preset communication range, thereby enabling the information data to be more efficiently provided to a user.

A smart light source configured for visible light communication. The light source includes a controller comprising a modem configured to receive a data signal and generate a driving current and a modulation signal based on the data signal. Additionally, the light source includes a light emitter configured as a pump-light device to receive the driving current for producing a directional electromagnetic radiation with a first peak wavelength in the ultra-violet or blue wavelength regime modulated to carry the data signal using the modulation signal. Further, the light source includes a pathway configured to direct the directional electromagnetic radiation and a wavelength converter optically coupled to the pathway to receive the directional electromagnetic radiation and to output a white-color spectrum. Furthermore, the light source includes a beam shaper configured to direct the white-color spectrum for illuminating a target of interest and transmitting the data signal.

A battery management system (BMS) recognition system, comprising: a master BMS including a master light emitter, the master BMS being configured to flicker the master light emitter to transmit an operation mode shifting signal to a slave BMS when it is intended to shift an operation mode of the slave BMS; and a slave BMS including a slave light receiver configured to correspond to the master light emitter, the slave BMS being configured to: recognize the flickering of the master light emitter through the slave light receiver; and shift the operation mode thereof in response to the operation mode shifting signal.

Various aspects of the present disclosure generally relate to a sensor module. In some aspects, a sensor module may include a collar configured to be attached to a camera module for a user device. The collar may include a first opening that is configured to align with an aperture of a camera of the camera module, and a second opening. The sensor module may include a sensor embedded in the collar. The sensor may be aligned with the second opening of the collar. Numerous other aspects are provided.

Provided is an in-store dual-mode communication system in which shelves are disposed within a commercial space. A server is coupled to the Internet and/or a wide-area network and is configured to send and receive communications. Also provided are light-based messaging units that are located on and/or attached to such shelves, each: 1) having a light source, 2) receiving a communication from the server, and 3) in response to receipt of such communication, turning the light source on and off so as to broadcast a digital message that was included within such communication, as a binary-encoded digital signal corresponding to on/off states of the light source. A user device: (i) receives, via its light sensor, and then decodes the binary-encoded digital signal from a light-based messaging unit in order to obtain the digital message that corresponds to it; and also (ii) communicates with the server via its wireless interface.

A unidirectional transmission device includes at least one substrate, at least one light source, and at least one light-sensing element. The at least one substrate includes at least one recess. The at least one light source is configured to transform an electrical signal into an optical signal, and transmit the optical signal. The at least one light-sensing element is configured to receive the optical signal, and transform the optical signal into the electrical signal, wherein the at least one recess is configured to dispose the at least one light source, or configured to dispose the at least one light-sensing element, or configured to reflect the optical signal.