LED를 광송수신 소자로 사용한 수동형 가시광 트랜스폰더
A Passive Visible Light Transponder Using an LED for an Optical Transceiver
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In this paper, we introduce a passive transponder in which an LED is used for both a light transmitter and a receiver, and a solar cell is used for supplying power to the all devices in the transponder. The LED in the transponder operates as a photodetector in the receiving mode, and acts as a light source in the transmitting mode. The current responsivity of the LED detector was measured to be in the order of 10-4 A/W, and the receiving bandwidth with a load resistance of 10kΩ was about 10 to 30kHz. Using the LED for an optical transceiver in a VLID transponder, the detection range was about 70 cm when the transponder was illuminated by the visible light from a 3×3 LED array in a reader.
Abstract
In this paper, we introduce a passive transponder in which an LED is used for both a light transmitter and a receiver, and a solar cell is used for supplying power to the all devices in the transponder. The LED in the transponder operates as a photodetector in the receiving mode, and acts as a light source in the transmitting mode. The current responsivity of the LED detector was measured to be in the order of 10-4 A/W, and the receiving bandwidth with a load resistance of 10kΩ was about 10 to 30kHz. Using the LED for an optical transceiver in a VLID transponder, the detection range was about 70 cm when the transponder was illuminated by the visible light from a 3×3 LED array in a reader.
참고문헌 (7)
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