An RFID ultra-high frequency LED tag

Abstract

The utility model relates to a kind of LED label of RFID ultra-high frequency, including control module, RFID ultra-high frequency module, display module, power module, interactive module and state indicating module, control module is electrically connected with RFID ultra-high frequency module, control module is electrically connected with display, state indicating module respectively, control module is electrically connected with interactive module, power module is electrically connected with control module, RFID ultra-high frequency module, display module, interactive module and state indicating module respectively, control module is as core and coordinates each module work, can receive the information transmitted by RFID ultra-high frequency module and control display module to carry out content display, simultaneously feedback working state by state indicating module, to realize that super high frequency RFID carries out inquiry, also can be watched by display module, ensure that label can efficiently complete information reception, processing, display and interactive response.

Description

Technical Field

[0001] This utility model relates to the field of luminescent tag technology, and in particular to an RFID ultra-high frequency LED tag. Background Technology

[0002] With the deepening application of IoT technology, RFID technology has become widespread in various fields due to its convenience of contactless identification. Among them, UHF RFID, with its characteristics of long-distance batch query and rapid data interaction, has become a core technology for efficient management of goods in logistics, warehousing and other scenarios. However, traditional UHF RFID tags can only achieve information query through dedicated reading and writing equipment. Users cannot directly obtain the key content stored in the tag and must rely on equipment operation, which has obvious limitations in scenarios requiring immediate viewing. While some tags with display functions can intuitively display information, they mostly use low-frequency or high-frequency RFID technology, making it difficult to realize the long-distance query advantage of UHF RFID. This results in a tradeoff between long-distance batch query and intuitive display viewing. Against this background, there is an urgent need for a tag that can simultaneously achieve long-distance query through UHF RFID and intuitive viewing through a display module, in order to break the current functional separation and improve the efficiency and convenience of information interaction. Utility Model Content

[0003] The purpose of this invention is to provide an RFID ultra-high frequency LED tag to solve the problems existing in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An RFID UHF LED tag includes a control module, an RFID UHF module, a display module, a power module, an interaction module, and a status indication module. The signal input terminal of the control module is electrically connected to the signal output terminal of the RFID UHF module. The signal output terminal of the control module is electrically connected to the signal input terminals of the display module and the status indication module, respectively. The bidirectional signal interface of the control module is electrically connected to the bidirectional signal interface of the interaction module. The power supply output terminal of the power module is electrically connected to the control module, the RFID UHF module, the display module, the interaction module, and the status indication module, respectively. The interaction module is used to receive external trigger signals and transmit them to the control module. The status indication module is used to provide feedback on the working status of the tag.

[0006] By adopting the above technical solution, the RFID UHF communication function and LED display function are organically combined. The control module, as the core, coordinates the work of each module. It can receive the information transmitted by the RFID UHF module and control the display module to display the content. At the same time, the status indicator module provides feedback on the working status, thereby enabling UHF RFID to be queried and also to be viewed through the display module, ensuring that the tag can efficiently complete information reception, processing, display and interactive response.

[0007] In a further embodiment, the control module includes a microprocessor, a memory, a real-time clock, and an interface circuit. The microprocessor is electrically connected to the memory, the signal input terminal of the microprocessor is electrically connected to the signal output terminal of the real-time clock, and the external interface terminal of the microprocessor is electrically connected to the internal interface terminal of the interface circuit. The demodulation signal input terminal of the microprocessor is electrically connected to the demodulation signal output terminal of the RFID UHF module, the display control output terminal of the microprocessor is electrically connected to the display control input terminal of the display module, the power control output terminal of the microprocessor is electrically connected to the control input terminal of the power module, and the status drive output terminal of the microprocessor is electrically connected to the drive input terminal of the status indication module. The external interface terminal of the interface circuit is used to interact with external devices.

[0008] By adopting the above technical solution, the control module uses a microprocessor as its core, combined with a memory to realize data storage and retrieval, a real-time clock to provide a precise time reference for the tag, and an interface circuit to expand the interaction capability with external devices. The microprocessor can efficiently process the demodulated signal transmitted by the RFID UHF module, accurately control the operation of the display module and status indicator module, and manage the power module, thereby improving the tag's computing efficiency, data processing capability and system stability.

[0009] In a further embodiment, the RFID UHF module includes a radio frequency front-end, an antenna, a matching network, a filtering circuit, and a modulation and demodulation circuit. The baseband signal interface of the modulation and demodulation circuit is electrically connected to the radio frequency signal interface of the control module. The radio frequency signal terminal of the modulation and demodulation circuit is electrically connected to the modulation and demodulation interface of the radio frequency front-end. The filtering input terminal of the radio frequency front-end is electrically connected to the filtering output terminal of the filtering circuit. The signal input terminal of the filtering circuit is electrically connected to the signal output terminal of the matching network. The interface of the matching network is electrically connected to the feed terminal of the antenna. The modulation and demodulation circuit is used to modulate the baseband signal output by the control module into a radio frequency signal and demodulate the radio frequency signal received by the antenna into a baseband signal and transmit it to the control module.

[0010] By adopting the above technical solution, the RFID UHF module realizes bidirectional conversion between baseband signals and radio frequency signals through modulation and demodulation circuit. The radio frequency front-end, filtering circuit and matching network jointly optimize signal transmission and reduce noise interference, while the antenna is responsible for the efficient transmission and reception of radio frequency signals. This structure ensures stable transmission and accurate demodulation of UHF signals, improves the communication distance and anti-interference capability of tags, and ensures the reliability of data interaction with the control module.

[0011] In a further embodiment, the display module includes a display panel, a driving circuit, an adjustment circuit, a backlight module, and a display circuit. The external signal terminal of the display circuit is electrically connected to the display signal terminal of the control module, the internal signal terminal of the display circuit is electrically connected to the control signal terminal of the driving circuit, the panel driving terminal of the driving circuit is electrically connected to the driving interface of the display panel, the backlight driving terminal of the driving circuit is electrically connected to the driving interface of the backlight module, the adjustment signal input terminal of the driving circuit is electrically connected to the signal output terminal of the adjustment circuit, the detection terminal of the adjustment circuit is used to collect display environment parameters, and the control interface of the adjustment circuit is electrically connected to the adjustment signal interface of the control module.

[0012] By adopting the above technical solution, the display module receives signals from the control module through the display circuit, the drive circuit precisely controls the operation of the display panel and backlight module, and the adjustment circuit can dynamically adjust the display effect according to the collected environmental parameters. This ensures that the label has a clear display effect in different environments, while reducing unnecessary energy consumption, improving the adaptability and energy efficiency of the display, and enhancing the user's experience in reading label information.

[0013] In a further embodiment, the power module includes a power input module, a power protection circuit, a voltage regulator circuit, a power management chip, and a backup energy storage element. The power management chip is electrically connected to the control module, the RFID UHF module, the display module, the interaction module, and the status indication module. The output terminal of the power input module is electrically connected to the input terminal of the power protection circuit. The output terminal of the power protection circuit is electrically connected to the input terminal of the voltage regulator circuit. The main output terminal of the voltage regulator circuit is electrically connected to the power input terminal of the power management chip. The energy storage interface of the voltage regulator circuit is electrically connected to the input terminal of the backup energy storage element. The power protection circuit is used to protect against overcurrent, overvoltage, and reverse connection. The backup energy storage element is used to maintain short-term power supply to each module when the power input is interrupted.

[0014] In a further embodiment, a communication expansion module is also included. The control interface of the communication expansion module is electrically connected to the expansion interface of the control module, and the power interface of the communication expansion module is electrically connected to the power module. The communication expansion module includes a protocol conversion circuit and a transmission unit. The input terminal of the protocol conversion circuit is electrically connected to the control module, and the output terminal of the protocol conversion circuit is electrically connected to the input terminal of the transmission unit. The transmission unit is used to realize short-range data interaction with external devices.

[0015] By adopting the above technical solution, the communication extension module uses a protocol conversion circuit to achieve signal adaptation between the control module and the transmission unit, and the transmission unit can perform close-range data interaction with external devices. This expands the tag's communication methods, making it compatible with more types of external devices and improving the tag's adaptability and data interaction flexibility in different application scenarios.

[0016] In a further embodiment, the antenna includes a radiating plate, a ground plane, and a feed probe. One end of the feed probe is electrically connected to the output of the matching network, and the other end of the feed probe is electrically connected to the feed point of the radiating plate. The ground plane is electrically connected to the grounding end of the tag. An insulating protective layer is provided on the surface of the radiating plate. The ground plane is electrically connected to the metal part of the tag shell through a metal connector to form a grounding loop.

[0017] By adopting the above technical solution, the antenna achieves efficient signal transmission with the matching network through the feed probe, the radiating plate is responsible for the radiation and reception of radio frequency signals, and the grounding loop formed by the grounding plane and the metal part of the tag shell can reduce signal interference; the insulating protective layer on the surface of the radiating plate enhances the durability of the antenna, and the overall structure improves the signal transmission and reception efficiency and stability of the antenna, ensuring the communication performance of the RFID UHF module.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. By using a microprocessor as the core and combining it with memory to realize data storage and retrieval, a real-time clock provides a precise time reference for the tag, and the interface circuit expands the interaction capability with external devices; the microprocessor can efficiently process the demodulated signal transmitted by the RFID UHF module, accurately control the operation of the display module and status indicator module, and manage the power module, thereby improving the tag's computing efficiency, data processing capability and system stability. Attached Figure Description

[0020] Figure 1 This is a flowchart of the entire utility model;

[0021] Figure 2 This is a flowchart of the RFID UHF module of this utility model;

[0022] Figure 3 This is a flowchart of the control module of this utility model;

[0023] Figure 4 This is a flowchart of the display module of this utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0026] Example 1:

[0027] like Figures 1-4 As shown, an RFID UHF LED tag includes a control module, an RFID UHF module, a display module, a power module, an interaction module, and a status indication module. The signal input terminal of the control module is electrically connected to the signal output terminal of the RFID UHF module. The signal output terminal of the control module is electrically connected to the signal input terminals of the display module and the status indication module, respectively. The bidirectional signal interface of the control module is electrically connected to the bidirectional signal interface of the interaction module. The power supply output terminal of the power module is electrically connected to the control module, the RFID UHF module, the display module, the interaction module, and the status indication module, respectively. The interaction module is used to receive external trigger signals and transmit them to the control module. The status indication module is used to provide feedback on the working status of the tag.

[0028] The control module includes a microprocessor, a memory, a real-time clock, and an interface circuit. The microprocessor is electrically connected to the memory, the microprocessor's signal input is electrically connected to the real-time clock's signal output, and the microprocessor's external interface is electrically connected to the interface circuit's internal interface. The microprocessor's demodulation signal input is electrically connected to the RFID UHF module's demodulation signal output, the microprocessor's display control output is electrically connected to the display module's display control input, the microprocessor's power control output is electrically connected to the power module's control input, and the microprocessor's status drive output is electrically connected to the status indicator module's drive input. The interface circuit's external interface is used for signal interaction with external devices.

[0029] The RFID UHF module includes a radio frequency front-end, an antenna, a matching network, a filter circuit, and a modulation and demodulation circuit. The baseband signal interface of the modulation and demodulation circuit is electrically connected to the radio frequency signal interface of the control module. The radio frequency signal terminal of the modulation and demodulation circuit is electrically connected to the modulation and demodulation interface of the radio frequency front-end. The filter input terminal of the radio frequency front-end is electrically connected to the filter output terminal of the filter circuit. The signal input terminal of the filter circuit is electrically connected to the signal output terminal of the matching network. The interface of the matching network is electrically connected to the feed terminal of the antenna. The modulation and demodulation circuit is used to modulate the baseband signal output by the control module into a radio frequency signal and demodulate the radio frequency signal received by the antenna into a baseband signal and transmit it to the control module.

[0030] The display module includes a display panel, a driving circuit, an adjustment circuit, a backlight module, and a display circuit. The external signal terminal of the display circuit is electrically connected to the display signal terminal of the control module, and the internal signal terminal of the display circuit is electrically connected to the control signal terminal of the driving circuit. The panel driving terminal of the driving circuit is electrically connected to the driving interface of the display panel, the backlight driving terminal of the driving circuit is electrically connected to the driving interface of the backlight module, the adjustment signal input terminal of the driving circuit is electrically connected to the signal output terminal of the adjustment circuit, the detection terminal of the adjustment circuit is used to collect display environment parameters, and the control interface of the adjustment circuit is electrically connected to the adjustment signal interface of the control module.

[0031] The power module includes a power input module, a power protection circuit, a voltage regulator circuit, a power management chip, and a backup energy storage element. The power management chip is electrically connected to the control module, the RFID UHF module, the display module, the interaction module, and the status indication module. The output terminal of the power input module is electrically connected to the input terminal of the power protection circuit. The output terminal of the power protection circuit is electrically connected to the input terminal of the voltage regulator circuit. The main output terminal of the voltage regulator circuit is electrically connected to the power input terminal of the power management chip. The energy storage interface of the voltage regulator circuit is electrically connected to the input terminal of the backup energy storage element. The power protection circuit is used to protect against overcurrent, overvoltage, and reverse connection. The backup energy storage element is used to maintain short-term power supply to each module when the power input is interrupted.

[0032] It also includes a communication expansion module. The control interface of the communication expansion module is electrically connected to the expansion interface of the control module, and the power interface of the communication expansion module is electrically connected to the power module. The communication expansion module includes a protocol conversion circuit and a transmission unit. The input terminal of the protocol conversion circuit is electrically connected to the control module, and the output terminal of the protocol conversion circuit is electrically connected to the input terminal of the transmission unit. The transmission unit is used to realize short-range data interaction with external devices.

[0033] The antenna includes a radiating plate, a ground plane, and a feed probe. One end of the feed probe is electrically connected to the output of the matching network, and the other end of the feed probe is electrically connected to the feed point of the radiating plate. The ground plane is electrically connected to the grounding end of the tag. The surface of the radiating plate is provided with an insulating protective layer. The ground plane is electrically connected to the metal part of the tag shell through a metal connector to form a grounding loop.

[0034] Specific implementation process: Upon startup of the power module, external power is input through the power input module. First, the power protection circuit protects against overcurrent, overvoltage, and reverse connection abnormalities. Then, the voltage is converted into a stable DC voltage by the voltage regulator circuit. One path is sent to the power management chip, which distributes the appropriate voltage to each module according to the control module's instructions. The other path charges the backup energy storage element to ensure short-term power supply during power outages. After power-on, the control module initializes using a microprocessor as its core, reads pre-stored system configuration parameters from the memory, loads the program, synchronizes with the real-time clock to obtain a precise time reference, and detects the connection status of each external module through the interface circuit. Once normal is confirmed, a startup command is sent to coordinate each module to enter the working state. When the RFID UHF module receives signals from an external reader, the UHF radio frequency signal is received by the antenna radiator, transmitted by the feed probe to the matching network for impedance optimization, then filtered by the filter circuit to remove noise, amplified and conditioned by the RF front-end, and finally demodulated by the modulation and demodulation circuit into a baseband signal for transmission to the microprocessor. When transmitting information, the baseband signal output by the microprocessor is converted into an UHF radio frequency signal by the modulation and demodulation circuit, and then conditioned by the RF front-end, filter circuit, and matching network before being radiated by the antenna. The ground plane of the antenna and the metal part of the tag shell form a ground loop to reduce interference, and the insulating protective layer on the surface of the radiator enhances durability. When the display module is working, the control module parses the information and sends the data to be displayed to the display circuit through the display signal terminal. The display circuit converts the signal into a control signal that the drive circuit can recognize. The drive circuit controls the display panel to light up the corresponding pixels and drives the backlight module to emit light. At the same time, the adjustment circuit collects environmental parameters and feeds them back to the control module. Based on this, the control module dynamically adjusts the display effect through adjustment interface commands to ensure clear display and energy saving in different environments. After receiving an external trigger signal, the interaction module transmits it to the microprocessor. The microprocessor processes the signal according to preset logic and drives the corresponding module to operate. The control module monitors the status of each module in real time and sends instructions to the status indicator module through the status driver output. The status indicator module provides feedback on the tag's current status using different colors or flashing frequencies. When non-UHF communication with external devices is required, the control module activates the communication expansion module through the expansion interface. Its protocol conversion circuit converts the control module's output signal into a protocol signal compatible with the transmission unit. The transmission unit then enables short-range data interaction with external devices, expanding the tag's application scenarios. Throughout the process, all modules work together to achieve information transmission, processing, display, and interaction functions.

[0035] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0036] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An RFID ultra-high frequency LED tag, characterized in that, The system includes a control module, an RFID UHF module, a display module, a power supply module, an interaction module, and a status indicator module. The signal input terminal of the control module is electrically connected to the signal output terminal of the RFID UHF module. The signal output terminal of the control module is electrically connected to the signal input terminals of both the display module and the status indicator module. The bidirectional signal interface of the control module is electrically connected to the bidirectional signal interface of the interaction module. The power supply output terminal of the power supply module is electrically connected to the control module, the RFID UHF module, the display module, the interaction module, and the status indicator module. The interaction module receives external trigger signals and transmits them to the control module. The status indicator module provides feedback on the working status of the tags.

2. The RFID UHF LED tag according to claim 1, characterized in that: The control module includes a microprocessor, a memory, a real-time clock, and an interface circuit. The microprocessor is electrically connected to the memory, and its signal input terminal is electrically connected to the signal output terminal of the real-time clock. The external interface terminal of the microprocessor is electrically connected to the internal interface terminal of the interface circuit. The demodulation signal input terminal of the microprocessor is electrically connected to the demodulation signal output terminal of the RFID UHF module, its display control output terminal is electrically connected to the display control input terminal of the display module, its power control output terminal is electrically connected to the control input terminal of the power module, and its status drive output terminal is electrically connected to the drive input terminal of the status indication module. The external interface terminal of the interface circuit is used to interact with external devices.

3. The RFID UHF LED tag according to claim 1, characterized in that: The RFID UHF module includes a radio frequency front-end, an antenna, a matching network, a filtering circuit, and a modulation / demodulation circuit. The baseband signal interface of the modulation / demodulation circuit is electrically connected to the radio frequency signal interface of the control module. The radio frequency signal terminal of the modulation / demodulation circuit is electrically connected to the modulation / demodulation interface of the radio frequency front-end. The filtering input terminal of the radio frequency front-end is electrically connected to the filtering output terminal of the filtering circuit. The signal input terminal of the filtering circuit is electrically connected to the signal output terminal of the matching network. The interface of the matching network is electrically connected to the feed terminal of the antenna. The modulation / demodulation circuit is used to modulate the baseband signal output by the control module into a radio frequency signal and demodulate the radio frequency signal received by the antenna into a baseband signal and transmit it to the control module.

4. The RFID UHF LED tag according to claim 1, characterized in that: The display module includes a display panel, a driving circuit, an adjustment circuit, a backlight module, and a display circuit. The external signal terminal of the display circuit is electrically connected to the display signal terminal of the control module, and the internal signal terminal of the display circuit is electrically connected to the control signal terminal of the driving circuit. The panel driving terminal of the driving circuit is electrically connected to the driving interface of the display panel, the backlight driving terminal of the driving circuit is electrically connected to the driving interface of the backlight module, the adjustment signal input terminal of the driving circuit is electrically connected to the signal output terminal of the adjustment circuit, the detection terminal of the adjustment circuit is used to collect display environment parameters, and the control interface of the adjustment circuit is electrically connected to the adjustment signal interface of the control module.

5. The RFID UHF LED tag according to claim 1, characterized in that: The power module includes a power input module, a power protection circuit, a voltage regulator circuit, a power management chip, and a backup energy storage element. The power management chip is electrically connected to the control module, the RFID UHF module, the display module, the interaction module, and the status indication module. The output terminal of the power input module is electrically connected to the input terminal of the power protection circuit. The output terminal of the power protection circuit is electrically connected to the input terminal of the voltage regulator circuit. The main output terminal of the voltage regulator circuit is electrically connected to the power input terminal of the power management chip. The energy storage interface of the voltage regulator circuit is electrically connected to the input terminal of the backup energy storage element. The power protection circuit is used to protect against overcurrent, overvoltage, and reverse connection. The backup energy storage element is used to maintain short-term power supply to each module when the power input is interrupted.

6. The RFID UHF LED tag according to claim 1, characterized in that: It also includes a communication expansion module, the control interface of which is electrically connected to the expansion interface of the control module, and the power interface of which is electrically connected to the power module. The communication expansion module includes a protocol conversion circuit and a transmission unit. The input terminal of the protocol conversion circuit is electrically connected to the control module, and the output terminal of the protocol conversion circuit is electrically connected to the input terminal of the transmission unit. The transmission unit is used to realize short-range data interaction with external devices.

7. The RFID UHF LED tag according to claim 3, characterized in that: The antenna includes a radiating plate, a ground plane, and a feed probe. One end of the feed probe is electrically connected to the output of the matching network, and the other end of the feed probe is electrically connected to the feed point of the radiating plate. The ground plane is electrically connected to the grounding end of the tag. The surface of the radiating plate is provided with an insulating protective layer. The ground plane is electrically connected to the metal part of the tag shell through a metal connector to form a grounding loop.

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