With the rapid development of the Internet of Things technology, RFID tag technology is gradually maturing and has been widely used in many fields. However, traditional RFID tags often lack intuitive visual feedback during item management and tracking, resulting in low efficiency when locating and managing items in complex environments. Light emitting diodes (LEDs), as a kind of efficient light-emitting components, have been introduced into RFID tags in recent years, resulting in the innovative technology of RFID light-up tags, which realize fast positioning and intuitive display of identified objects by integrating LEDs.
RFID light-up tags in the traditional RFID tags based on the addition of LED lights. When the tag is recognized by the reader, the internal circuit of the tag will control the LED light, to visually feedback the recognized state.RFID light electronic tags not only retain the traditional RFID tags of non-contact identification advantages, but also increased intuition, making the management of goods more efficient.
(1) radio frequency signal transmission. Read-write through the transmitting antenna to send a certain frequency of radio frequency signals, these signals in the space propagation, the formation of a certain magnetic field range.
(2) Tag sensing and activation. When the light-emitting RFID tags into the range of radio frequency signals emitted by the reader, the tag's antenna receives the radio frequency signals and produces an inductive current, thereby activating the chip in the tag. The chip uses the energy gained from the inductive current to prepare to send the information stored in the tag.
(3) Information Transmission and LED Control. After activation of the tag chip will be stored in the tag information (such as electronic code, etc.) through the antenna in the form of radio frequency signals sent out, and at the same time to control the LED lights, the LED lights on the state as the item is recognized as intuitive feedback, to facilitate the staff to quickly locate the target item.
(4) Information reception and processing. The read-write receives from the RFID light electronic tag sends the radio frequency signal, after the demodulation, decoding and so on processing, can obtain the RFID light electronic tag in the stored information. This information is then transmitted to the data management system for further processing and analysis.
LED in RFID tags in the application of advantages: rapid positioning and intuitive display,, multi-target identification and simultaneous processing, low maintenance costs, strong penetration, data security and reliability.
In summary, the application of LED in RFID tags not only retains the advantages of non-contact identification of RFID technology, but also increases the intuition and convenience.
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