An optical wireless communication device for transmitting data comprises a transmitter comprising a light source, a controller configured to control operation of the light source to produce modulated light comprising an optical wireless communication signal representative of said data, at least one proximity determining component configured to determine a proximity of an object, and a processing resource configured to determine whether the determined proximity is within a threshold distance, wherein the controller is configured to control operation of the transmitter and/or of at least one other component of the optical wireless communication device in dependence on whether the determined proximity is within the threshold distance.

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 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.

A method for a system includes broadcasting with a first radio, identification signals, scanning with the first radio, ephemeral ID signals, detecting with the first radio a first ephemeral ID signal from a first device, determining with the first radio whether a session exists with the first device, in response to the first ephemeral ID, initiating pairing between a second radio and the first device when the session does not exist, thereafter scanning with the first radio for ephemeral ID signals, and detecting with the first radio a second ephemeral ID signal from a second device, thereafter completing pairing the second radio and the first device, receiving with the first radio from the first smart-device a first token, determining in the first radio whether the first token is valid, and effecting with the first radio a user-perceptible action with a peripheral in response to the first token being valid.

An optical communication method is an optical communication method for performing optical communication with a light-emitting device serving as a communication target. The optical communication method includes: a first step of reading information relating to a distance to the light-emitting device and information relating to a size of a light-emitting region included in the light-emitting device, the information relating to the distance and the information relating to the size being stored in advance; a second step of controlling an imaging range of a camera based on the information relating to the distance and the information relating to the size, the camera capturing an image of light from the light-emitting device; and a third step of extracting a signal from light emitted from the light-emitting device based on image data that the camera has captured in the imaging range.

A system to detect obstacles includes a power beam transmission circuit, a power beam reception circuit arranged to receive a power beam from the power beam transmission circuit, an emitter module, and a detector module arranged to distinguish between a first characteristic and a second characteristic. The emitter module includes a first emitter arranged to emit a first signal having the first characteristic, the first signal emitted in proximity to the power beam, and a second emitter arranged to emit a second signal having the second characteristic, the second characteristic different from the first characteristic, the second signal emitted in proximity to the first signal. The detector module includes a first detector arranged to respond to the first signal emitted by the first emitter, wherein the detector module is arranged to determine when an obstacle is in or near a line-of-sight transmission path between the first emitter and the first detector.

The present disclosure provides an information transmitting device for optical communication, an optical communication method and an optical communication system. The information transmitting device includes: a distance sensor, configured to detect a distance from the information transmitting device to an information receiving device; a light emitting element, configured to issue an optical signal to the information receiving device, the optical signal including an optical communication information; a controller electrically coupled to the distance sensor and the light emitting element respectively, configured to adjust a light emitting mode of the light emitting element according to the distance detected, so that an intensity of the optical signal received by a light sensor of the information receiving device is greater than or equal to a start-up light intensity of the light sensor, thereby the light sensor can sense the optical signal at a rated resolution.

A directional free-space optical communication system includes a source device including a laser diode and an endpoint device including a photodiode. The endpoint device and the source device also include an adjustable optics subsystem that increases both angular and positional offset tolerance between the source device and the endpoint device.

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.