Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Disclosed is a system for charge-discharge cycler, particularly to a system for charge-discharge cycler in which a structure of a shunt is improved to improve performance/accuracy of a current control as a key component of an instrument for testing a secondary battery charge-discharge. A system for charge-discharge cycler has the effect of improving the degree of precision/performance of the current control during a charge/discharge inspection of the secondary battery, thereby raising the standard of development/aspect of the secondary battery and developing a charge/discharge performance tester of high performance.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present disclosure in some embodiments provides a transmit data structure and a communication method using the same, which can minimize the loss of the transmit data during the transmission and reception of the transmit data by optical camera communication.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A light emitting diode floodlight includes a hollow housing, a lens, a cover, a light source, an illumination reflector, an intermediate portion, and a power source. The cover is coupled to the end of the housing and configured to hold and support the lens. The light source has a pyramidal frustum-shaped portion installed at an opposite end of the housing. The illumination reflector is installed within the housing so as to surround a periphery of the pyramidal frustum-shaped portion of the light source. The intermediate portion is connected to a first heat sink of the light source and has a second heat sink on an outer peripheral surface thereof. The power source has a power supply electrically connected to the light source.