Idro Co., Ltd

Other

Yanggi Kang

Kwangjin Oh

Jungsung Park

Sangmok Lee

A tag selection type optical radio frequency identification (RFID) tag depending on presence or not of visible light includes a photodiode configured to convert a visible light-type signal transmitted from a reader into an electrical signal, a tag integrated circuit (IC) configured to read information on the visible-light type signal using an analog digital converter (ADC) or comparator connected to the photodiode to receive the electrical signal therefrom, configured to be operated using energy obtained by converting a radio frequency (RF) signal received from the reader, to return a value determined to correspond to information to the reader, and configured to transmit stored data according to a command obtained by demodulating the electrical signal of the photodiode to the reader, and an antenna configured to facilitate reception of the RF signal by the tag IC or to facilitate transmission of the value and the data from the tag IC.

Tag selection type optical RFID tag depending on presence or not of visible light

Wireless charger for portable terminal

A backscattering type radio frequency identification (RFID) communication system, and more particularly, a backscattering type RFID communication system in which an RFID tag transmits a signal back to an RF reader by using energy of a carrier wave transmitted by the RFID reader. Provided is a backscattering type radio frequency identification (RFID) communication system RFID communications are performed efficiently without an error while interference between RFID readers does not occur even under an overcrowded reader environment. Interference of RF signals between the RFID readers does not occur, and RFID communications can be efficiently performed even under the overcrowded reader environment. Transmitting and receiving time steps of the RFID readers do not need to be synchronized with one another so that compatibility of the RFID readers can be improved.

Backscattering type RFID communication system

An apparatus for detecting a lead distance between a user vehicle and a target vehicle includes first and second position sensitive devices (PSD) arranged in the user vehicle orthogonal to the distance and each having first and second light receivers configured to receive light emitted from the target vehicle, in which the first and second PSDs output voltage corresponding intensity of light received by the first and second light receivers, and a controller configured to receive voltages output from the first and second PSDs and calculate the distance using Equation 1: L=(KD/d)/(v1&#x2212;v2).

Method and apparatus for detecting distance between vehicles

Provided is an organic light emitting diode (OLED) display device for visible ray communication, including: a substrate; a plurality of OLED pixels that are formed on the substrate and generate a red (R), green (G), or blue (B) visible ray; and a plurality of light receiving units that are formed on the substrate to sense a visible ray signal and convert the visible ray signal to an electrical signal.

OLED display for visible ray communication

A visible light multiplex communication system is presented which includes identification (ID) information and data information which can be simultaneously transmitted and received to and from a server and a plurality of clients by using visible light. Visible light ID communication and visible light data communication do not interfere with each other in the same space during visible light communication. In addition, data can be efficiently transmitted and received to and from a plurality of ID clients using visible light. In addition, visible light ID communication and visible light data communication can be efficiently performed in a state where interference between clients using different protocols does not occur in the same place. Furthermore, a specific unit that is capable of efficiently transmitting and receiving data to and from a plurality of clients by using visible light can be provided.

Growing community of inventors

Yongin-si, South Korea

Yanggi Kang