Yuyang Dnu Co., Ltd

Sangok Kim

Byungoh Kim

Sang-ho Yoon

Dongsik Kim

Seung-wan Roh

Sang Il Choi

Seok-joo Koh

Hyuncheol Shim

Hyun-cheol Shim

Disclosed are a method and apparatus for registering visible light communication devices and combining a visible light communication signal and a wireless communication signal. It is an object of the present disclosure to provide a visible light communication device registration method in which a lighting device allows collective registration of the lighting device and a terminal as the terminal transmits data to a light using wireless communication.

Apparatus and method for registering visible light communication device and combining visible light communication signal and wireless communication signal

A visible light communication device management method and apparatus are disclosed. According to one aspect of the present disclosure, an object of the present disclosure is to provide an apparatus and method for checking and managing a membership of a terminal, such as a communication state and a location of a terminal managed by the server.

Method and apparatus for managing visible light communication devices

Disclosed are a visible light communication method and apparatus. It is one object of the present disclosure to provide an apparatus for generating data including a visible light communication device management protocol header to allow only a specific terminal to receive data transmitted by a lighting device using visible light communication, and a method therefor.

Method and apparatus for visible light communication

Some embodiments of the present disclosure relate to a method and an apparatus for providing a visually impaired a route guidance in a subway station by selectively providing the visually impaired at least one of guidance information received from a visible light illumination device installed in the subway station or information on a recommended route from the subway station to a destination and pre-stored route history information, thus informing the visually impaired as needed in a more efficient manner and enabling the visually impaired to arrive at the destination with safety.

Route guidance method and apparatus for visually impaired using visible light communication inside subway station

A flickerless LED driver device includes a transformer having a primary coil for receiving an alternating-current (AC) voltage, and a secondary coil for generating a first induced voltage induced from the primary coil; a secondary coil circuit for receiving the first induced voltage and applying a first direct-current (DC) voltage to an LED module; a current sensor for sensing a driving current flowing through the secondary coil circuit from the secondary coil; a current controller for receiving a signal about the driving current and generating a control signal for controlling an emission current flowing through the LED module; and a ripple attenuator connected to the LED module to receive a visual light communication (VLC) signal and the control signal, control an emission current corresponding to the VLC signal to flow through the LED module, and suppress ripple of the emission current.

Flickerless LED driver device

The present embodiment provides a lighting control system including visible light communication modules separately corresponding to lighting devices, each visible light communication module including a body, and a pair of a light-emitting element and a light-receiving element provided on each of a plurality of outer surfaces of the body. Efficient visible-light-based lighting control services may be provided by transmitting or receiving visible light communication data for controlling lighting devices, to or from other visible light communication modules of front, rear, left, and right directions using the pair of the light-emitting and light-receiving elements.

Method and apparatus for controlling lighting device, using visible light communication

A vehicle safety device using visible light communication is disclosed. A vehicle safety apparatus using visible light communication includes a brake sensor on a main vehicle brake pedal for generating a deceleration signal by a degree of braking, an acceleration sensor on a main vehicle accelerator pedal for generating an acceleration signal by a degree of acceleration, a visible light receiver for receiving a preceding-vehicle signal from at least one preceding vehicle and a following-vehicle signal from at least one following vehicle, a visible light transmitter for transmitting a main vehicle signal to the preceding vehicle and vehicles, a collision risk determination unit for determining whether a danger of collision is present based on the preceding-vehicle signal, the following and main-vehicle signal, and an alarm unit for issuing an alarm to driver in response to the collision risk determination unit determining the presence of a danger of collision.

Growing community of inventors

Seoul, South Korea

Sangok Kim