Led display screen module based on module level encryption

Abstract

The application provides an LED display screen module based on module-level encryption, wherein a microcontroller, a signal amplification chip and an external authorization interface are integrated in the module, so that whether the module can be lighted is directly controlled by an authorization signal; an enable end OE of the signal amplification chip is controlled by the microcontroller; the microcontroller outputs a valid control level only after receiving a legal authorization signal from a dongle device, so that the signal amplification chip is turned on and video signals are transmitted to an LED driving chip, thereby driving LED lamp beads to be lighted and displayed; if the authorization signal is not received, the signal amplification chip remains in an off state, the video signals cannot be transmitted, and the module is in an off state. Through the scheme, independent encryption control of a single LED display screen module can be realized, unauthorized use can be effectively prevented, and the security of the product and the collection guarantee capability of the supplier are improved.

Description

Technical Field

[0001] This invention relates to the field of device encryption technology, and in particular to an LED display module based on module-level encryption. Background Technology

[0002] Existing LED displays typically consist of sending cards, receiving cards, and display modules, which can be used normally by contractors after installation. However, due to the high overall price of LED displays, installment payments are common in the industry, especially in the final payment stage. Often, because the screen has already been delivered and is operational, suppliers lack effective means to collect outstanding payments. To address this, some technical solutions attempt to encrypt and control the display at the system level, such as verifying authorization codes through sending or receiving cards to restrict the display's activation and use. However, these methods often have the following problems: First, encryption relies on the control system; if the sending end is bypassed or the receiving end is replaced, the module can still be illegally activated, resulting in insufficient security. Second, encryption functionality is concentrated in the control system, making it difficult to achieve fine-grained authorization control at the individual display module level. Third, the lack of independent encryption protection at the module level hinders suppliers from implementing tiered management and phased release of products.

[0003] In summary, the shortcomings of the existing technology urgently need to be addressed. Summary of the Invention

[0004] This invention provides an LED display module based on module-level encryption to overcome the shortcomings of the prior art and achieve independent encrypted control of a single LED display module.

[0005] This invention provides an LED display module based on module-level encryption, comprising: Signal input terminal, used to receive video signals; A signal amplification chip, with its input terminal connected to the signal input terminal and its output terminal connected to the LED driver chip, is used to shape and amplify the video signal; The signal amplification chip includes an enable terminal OE, which is used to control the on / off state of the video signal. The input terminal of the LED driver chip is connected to the output terminal of the signal amplifier chip, and is used to drive the LED beads to display images. The microcontroller has its I / O port connected to the OE terminal of the signal amplification chip, and is used to output a control level signal to the OE terminal of the signal amplification chip according to the received authorization signal, so as to control the signal amplification chip to turn on or off. The microcontroller includes an external authorization interface for connecting to a dongle device to receive authorization signals from the dongle device. The pull-up resistor is used to keep the OE terminal of the signal amplifier chip at a high level when the microcontroller is not outputting a signal.

[0006] According to the present invention, an LED display module based on module-level encryption is provided, wherein the microcontroller is used to output a control level signal to the OE terminal of the signal amplification chip through a control program, so as to control the signal amplification chip to turn on or off; The microcontroller also includes a programming interface for programming control programs into the MCU.

[0007] According to the present invention, an LED display module based on module-level encryption is provided, wherein the external authorization interface is a USB interface or a serial port interface.

[0008] According to the present invention, an LED display module based on module-level encryption is provided, wherein the dongle device includes a storage chip and an encryption chip, the storage chip is used to store authorization information, and the encryption chip is used to encrypt the authorization information.

[0009] According to the present invention, an LED display module based on module-level encryption is provided, wherein the microcontroller further includes a storage unit for storing unique identification information that matches the dongle device.

[0010] According to the present invention, an LED display module based on module-level encryption is provided, wherein the microcontroller is also connected to a clock circuit, which is used to provide a time reference for the verification process of the authorization signal.

[0011] According to the present invention, an LED display module based on module-level encryption is provided, wherein the microcontroller further includes a communication interface for communicating with a host computer to receive remotely issued authorization update information.

[0012] According to the present invention, an LED display module based on module-level encryption is provided, wherein the signal amplification chip is a dedicated buffer chip for video signals or a programmable logic device.

[0013] According to the present invention, an LED display module based on module-level encryption is provided, wherein the pull-up resistor has a resistance value of 1kΩ to 10kΩ.

[0014] According to the present invention, an LED display module based on module-level encryption is provided, wherein the LED driver chip is a constant current driver chip.

[0015] This invention provides an LED display module based on module-level encryption. By integrating a microcontroller, a signal amplification chip, and an external authorization interface within the module, the module's ability to illuminate is directly controlled by an authorization signal. Specifically, the enable pin (OE) of the signal amplification chip is controlled by the microcontroller. Only after receiving a legitimate authorization signal from the dongle device does the microcontroller output a valid control level, enabling the signal amplification chip to conduct and transmit the video signal to the LED driver chip, thereby driving the LED beads to illuminate. If no authorization signal is received, the signal amplification chip remains off, the video signal cannot be transmitted, and the module remains off. This solution enables independent encrypted control of a single LED display module, effectively preventing unauthorized use and improving product security and supplier payment assurance. Furthermore, this solution does not rely on upper-level sending or receiving cards, exhibiting good versatility and independence, and facilitating flexible application in different types of display projects. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the LED display module based on module-level encryption provided by the present invention; Figure 2 This is a circuit diagram of an LED display module based on module-level encryption provided by the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0019] To address the problems in existing technologies, this invention proposes an LED display module based on module-level encryption to achieve independent encrypted control of individual LED display modules. The module-level encryption-based LED display module is described below, as follows: Figure 1 , Figure 2 As shown, it includes: Signal input terminal, used to receive video signals; A signal amplification chip, with its input terminal connected to the signal input terminal and its output terminal connected to the LED driver chip, is used to shape and amplify the video signal; The signal amplification chip includes an enable terminal OE, which is used to control the on / off state of the video signal. The input terminal of the LED driver chip is connected to the output terminal of the signal amplifier chip, and is used to drive the LED beads to display images. The microcontroller has its I / O port connected to the OE terminal of the signal amplification chip, and is used to output a control level signal to the OE terminal of the signal amplification chip according to the received authorization signal, so as to control the signal amplification chip to turn on or off. The microcontroller includes an external authorization interface for connecting to a dongle device to receive authorization signals from the dongle device. The pull-up resistor is used to keep the OE terminal of the signal amplifier chip at a high level when the microcontroller is not outputting a signal.

[0020] In this embodiment, the LED display module includes: a signal input terminal, a signal amplification chip, an LED driver chip, a microcontroller, and a pull-up resistor.

[0021] The signal input terminal is used to receive video signals from an external control system. The input terminal of the signal amplification chip is connected to the signal input terminal, and its output terminal is connected to the input terminal of the LED driver chip. This chip is used to shape and amplify the video signal to ensure signal transmission quality. The signal amplification chip includes an enable terminal (OE), which controls the on / off state of the video signal. When the OE terminal is at an active level, the signal amplification chip is turned on, and the video signal can be transmitted to the LED driver chip; when the OE terminal is at an inactive level, the signal amplification chip is turned off, and the video signal is cut off.

[0022] The LED driver chip is connected to the output of the signal amplification chip to receive the shaped and amplified video signal, and to drive and control the LED beads according to the signal content to realize the lighting and display of the image.

[0023] The microcontroller (MCU) has its I / O ports connected to the OE terminal of the signal amplifier chip. Based on the received authorization signal, it outputs corresponding high and low level signals to control the signal amplifier chip's on / off state. Specifically, the microcontroller includes an external authorization interface for connecting to a dongle device. When the dongle device is inserted into the external authorization interface and outputs a valid authorization signal, the microcontroller identifies the authorization signal according to its internal control logic and outputs a valid level to the OE terminal of the signal amplifier chip, enabling video signal transmission and driving the LED display module to light up. If no authorization signal is detected, the microcontroller maintains an invalid level at the OE terminal, the signal amplifier chip is turned off, and the module remains off.

[0024] In addition, the OE terminal of the signal amplification chip is connected to the power supply VCC through a pull-up resistor. When the microcontroller does not output a valid level signal, the OE terminal remains at a high level, thereby ensuring that the signal amplification chip is in a default off state when there is no control signal output, so as to further improve the safety of the module.

[0025] The above technical solution enables independent encryption control within the LED display module, ensuring that the module can only light up when it receives a legitimate authorization signal from the dongle device, effectively preventing unauthorized use.

[0026] As a further optional embodiment, the microcontroller is configured to output a control level signal to the OE terminal of the signal amplification chip via a control program, so as to control the signal amplification chip to be turned on or off. The microcontroller also includes a programming interface for programming control programs into the MCU.

[0027] In this embodiment, the control program includes logic for recognizing authorization signals. When the microcontroller receives a legitimate authorization signal from the dongle device through the external authorization interface, the microcontroller executes the control program and outputs a valid level to the OE terminal, thereby turning on the signal amplification chip and enabling the video signal to be transmitted to the LED driver chip to achieve normal lighting of the display module. If no legitimate authorization signal is detected, the microcontroller keeps the OE terminal in an invalid level state according to the control program, thereby turning off the signal amplification chip, cutting off the video signal, and preventing the LED display module from lighting up.

[0028] Furthermore, the microcontroller also includes a programming interface for programming the control program into the MCU. Through the programming interface, the control logic of the microcontroller can be updated or upgraded during production or maintenance to meet the customized requirements of different projects or customers for encryption logic, thereby improving the system's flexibility and scalability.

[0029] This embodiment introduces a programming interface into the microcontroller, which not only ensures the solidification and security of the authorized control logic, but also provides convenience for later updates and maintenance, thereby further enhancing the applicability and maintainability of the LED display module based on module-level encryption.

[0030] As a further optional embodiment, the external authorization interface is a USB interface or a serial port interface.

[0031] In this embodiment, when the external authorization interface is a USB interface, the dongle device can interact with the microcontroller in a plug-and-play manner, exhibiting high compatibility and transmission speed, suitable for most standardized application scenarios. When the external authorization interface is a serial port interface, the dongle device and the microcontroller can transmit data via a serial communication protocol. This interface has a simple structure and low power consumption, suitable for applications where communication speed requirements are not high but system cost is sensitive. Through flexible configuration of the external authorization interface, the LED display module of this invention can adapt to different types of dongle devices, improving the system's applicability and versatility.

[0032] As a further optional embodiment, the dongle device includes a storage chip and an encryption chip, wherein the storage chip is used to store authorization information and the encryption chip is used to encrypt the authorization information.

[0033] In this embodiment, the storage chip can be an EEPROM, Flash memory, or other non-volatile memory, used to store a unique authorization code or key information corresponding to the LED display module. The encryption chip can be a hardware encryption unit, supporting symmetric or asymmetric encryption algorithms, used to encrypt or decrypt the authorization information when the microcontroller requests verification. Specifically, the microcontroller sends a verification request to the dongle device through an external authorization interface. The encryption chip processes the authorization information in the storage chip according to a preset algorithm and returns the result to the microcontroller. The microcontroller determines whether the authorization is valid based on the returned result. If the verification is successful, it outputs a valid level to the OE terminal of the signal amplification chip, thereby allowing video signal transmission and enabling the LED display module to light up; if the verification fails, it maintains an invalid level at the OE terminal, and the module remains off.

[0034] By incorporating storage and encryption chips into the dongle device, secure storage and encryption of authorized information can be achieved, significantly improving the encryption reliability and anti-cracking capabilities of the LED display module.

[0035] As a further optional embodiment, the microcontroller also includes a storage unit for storing unique identification information that matches the dongle device.

[0036] In this embodiment, the storage unit can be an EEPROM, Flash memory, or an on-chip integrated non-volatile memory module, used to store a unique identifier corresponding to the dongle device, such as a serial number, key, or authentication code. When the dongle device is connected to the microcontroller through an external authorization interface, the microcontroller can read the identification information output by the dongle device and compare it with the unique identifier information pre-stored in the storage unit. If the comparison result matches, the authorization is deemed valid, and the microcontroller outputs a valid level to the OE terminal of the signal amplification chip, turning on the signal amplification chip and driving the LED display module to light up; if the comparison result does not match, the authorization is deemed invalid, the microcontroller maintains an invalid level at the OE terminal, and the module remains off.

[0037] By setting up a storage unit in the microcontroller and storing unique identification information, it is possible not only to verify the identity of the dongle device, but also to prevent unauthorized copying or misuse of authorization information, thereby further enhancing the security and anti-hacking capabilities of the LED display module.

[0038] As a further optional embodiment, the microcontroller is also connected to a clock circuit that provides a time reference for the verification process of the authorization signal.

[0039] In this embodiment, the clock circuit can be a crystal oscillator circuit, an RTC (Real Time Clock) module, or other high-precision clock sources, and its output clock signal serves as a time reference for the microcontroller's internal logic operations. When the microcontroller receives an authorization signal from the dongle device, it can perform a verification process based on the time reference provided by the clock circuit, such as determining the validity period of the authorization information or verifying the timestamp during encrypted communication. If the verification process is completed within a specified time window and the result is correct, the authorization is deemed valid; if the time window is exceeded or the verification fails, the authorization is deemed invalid, and the LED display module remains in the off state.

[0040] By introducing a clock circuit to provide a time reference during the verification process, replay attacks or delay attacks can be effectively avoided, ensuring the timeliness and security of authorized signals, thereby further enhancing the protection capabilities of LED display modules in module-level encryption control.

[0041] As a further optional embodiment, the microcontroller also includes a communication interface for communicating with a host computer to receive remotely issued authorization update information.

[0042] In this embodiment, the communication interface can be one or more of a wired interface (such as an Ethernet interface or an RS485 interface) or a wireless interface (such as a Wi-Fi module, a Bluetooth module, or a 4G / 5G communication module). Through this communication interface, the microcontroller can establish a data connection with a host computer and receive remotely issued authorization update information from the host computer, such as new authorization codes, keys, or authentication policies. After receiving the update information, the microcontroller can write it to its internal storage unit or match and verify it with the authorization information of the dongle device, thereby achieving real-time control of the module's operating status and dynamic updates to the authorization logic.

[0043] Under this design, the LED display module can not only be authorized and verified locally through the dongle device, but also remotely authorized, updated and managed through the host computer. This improves the flexibility and controllability of the system in large-scale projects or distributed application scenarios, and helps suppliers achieve unified management of the entire life cycle of the display module.

[0044] As a further optional embodiment, the signal amplification chip is a dedicated buffer chip for video signals or a programmable logic device.

[0045] In this embodiment, when the signal amplification chip adopts a dedicated video signal buffer chip, the chip can amplify the amplitude and shape the waveform of the input video signal to ensure that the signal remains stable and clear when transmitted to the LED driver chip, thereby ensuring the consistency and reliability of the display effect.

[0046] When the signal amplification chip employs a programmable logic device (such as an FPGA or CPLD), it can flexibly implement different signal processing logics while amplifying the video signal, such as video format conversion, timing adjustment, or multi-channel signal selection. Through programmable logic devices, the LED display module can be functionally expanded or customized according to specific application scenarios, improving the system's flexibility and adaptability.

[0047] Therefore, the improvement to the signal amplification chip in this embodiment enables the LED display module to either use a dedicated chip to achieve stable and reliable signal amplification, or use a programmable device to achieve flexible and adjustable signal processing, thus meeting the diverse performance and functional requirements of different projects.

[0048] As a further optional embodiment, the pull-up resistor has a resistance value of 1kΩ to 10kΩ.

[0049] In this embodiment, a resistance value of 1kΩ is preferably selected to ensure signal rise time while avoiding excessive power consumption, thereby balancing signal integrity and system stability.

[0050] As a further optional embodiment, the LED driver chip is a constant current driver chip.

[0051] In this embodiment, the constant current driving chip can drive and control the LED unit according to the set driving current parameters, thereby avoiding the problem of uneven LED brightness caused by power supply voltage fluctuations or load changes, and ensuring the stability and consistency of the display screen.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An LED display module based on module-level encryption, characterized in that, include: The signal input terminal is used to receive video signals. A signal amplification chip, with its input terminal connected to the signal input terminal and its output terminal connected to the LED driver chip, is used to shape and amplify the video signal; The signal amplification chip includes an enable terminal OE, which is used to control the on / off state of the video signal. The input terminal of the LED driver chip is connected to the output terminal of the signal amplifier chip, and is used to drive the LED beads to display images. The microcontroller has its I / O port connected to the OE terminal of the signal amplification chip, and is used to output a control level signal to the OE terminal of the signal amplification chip according to the received authorization signal, so as to control the signal amplification chip to turn on or off. The microcontroller includes an external authorization interface for connecting to a dongle device to receive authorization signals from the dongle device. The pull-up resistor is used to keep the OE terminal of the signal amplifier chip at a high level when the microcontroller is not outputting a signal.

2. The LED display module based on module-level encryption according to claim 1, characterized in that, The microcontroller is used to output a control level signal to the OE terminal of the signal amplification chip through a control program, so as to control the signal amplification chip to turn on or off. The microcontroller also includes a programming interface for programming control programs into the MCU.

3. The LED display module based on module-level encryption according to claim 1, characterized in that, The external authorization interface is a USB interface or a serial port interface.

4. The LED display module based on module-level encryption according to claim 1, characterized in that, The dongle device includes a storage chip and an encryption chip. The storage chip is used to store authorization information, and the encryption chip is used to encrypt the authorization information.

5. The LED display module based on module-level encryption according to claim 1, characterized in that, The microcontroller also includes a storage unit for storing unique identification information that matches the dongle device.

6. The LED display module based on module-level encryption according to claim 1, characterized in that, The microcontroller is also connected to a clock circuit, which provides a time reference for the verification process of the authorization signal.

7. The LED display module based on module-level encryption according to claim 1, characterized in that, The microcontroller also includes a communication interface for communicating with a host computer to receive remotely issued authorization update information.

8. The LED display module based on module-level encryption according to claim 1, characterized in that, The signal amplification chip is a dedicated buffer chip for video signals or a programmable logic device.

9. The LED display module based on module-level encryption according to claim 1, characterized in that, The pull-up resistor has a resistance of 1kΩ to 10kΩ.

10. The LED display module based on module-level encryption according to claim 1, characterized in that, The LED driver chip is a constant current driver chip.

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