Display interface module and LED display system

Abstract

The invention provides a display interface module and an LED display system. The LED display system comprises an LED display module, a sending box, an interface card and a display interface module. An interface unit in the display interface module can synchronously receive a power signal and an LVDS signal, and an output unit can synchronously transmit the power signal and a TTL signal, so that compatibility of signal transmission and power transmission is realized, the number of wires and operation steps for field installation are effectively reduced, and human resource investment and installation time consumption are reduced; meanwhile, the signal conversion unit can convert the LVDS signal into a TTL signal, so that the requirement of the LED display module on the TTL signal is effectively met, and the smoothness of signal transmission is ensured; besides, the display interface module comprises a storage unit, the storage unit can be used for storing correction data of the LED display module, an independent correction storage circuit does not need to be additionally arranged on the LED display module, redundant components and circuit design are omitted, hardware cost is reduced, and optimization of a product structure is facilitated.

Description

Technical Field

[0001] This invention relates to the field of display device technology, and in particular to a display interface module and an LED display system. Background Technology

[0002] As LED displays are increasingly used in various applications, the market demands for simplified structure, streamlined materials, and ease of installation. Currently, conventional LED display modules generally use separate DC power supply and signal sockets, requiring users to connect power and signal transmission cables separately during on-site installation. This cumbersome process not only increases manpower and installation time but also complicates subsequent maintenance.

[0003] Furthermore, the signal transmission of LED display modules in related technologies mostly adopts TTL signal form. This signal transmission method requires as many as a dozen or even dozens of lines, and is prone to generating large electromagnetic radiation, with weak anti-interference ability, which affects the stability of signal transmission.

[0004] Therefore, there is an urgent need for a technology that can achieve integrated power and signal transmission and simplify the installation process to meet the LED display industry's demand for high-efficiency, low-cost, and highly stable products. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention provides a display interface module for an LED display module, the display interface module comprising: The interface unit is used to receive power signals and LVDS signals; A signal conversion unit, connected to the interface unit, is used to receive the LVDS signal and convert the LVDS signal into a TTL signal; Storage unit, used to store the calibration data of the LED display module; The output unit is electrically connected to the signal conversion unit and is used to transmit the power signal and the TTL signal to the LED display module.

[0006] In some embodiments of this application, the signal conversion unit includes a signal conversion chip and a conversion circuit, the conversion circuit being electrically connected to the interface unit and the signal conversion chip, the signal conversion chip being used to convert the LVDS signal into a TTL signal; and / or, the storage unit being integrated with the signal conversion chip.

[0007] In some embodiments of this application, the output unit includes an output pin, which is soldered and fixed to the LED display module, and the output pin is electrically connected to the driver chip of the LED display module.

[0008] In some embodiments of this application, the interface unit is a Type-C interface.

[0009] The present invention also provides an LED display system, comprising: LED display module; Transmitter box, used to receive and convert video signals; A receiver card, electrically connected to the transmitter box, is used to receive the video signal converted by the transmitter box and can convert it into an LVDS signal; The aforementioned display interface module is electrically connected to the receiving card via a cable, and the display interface module is capable of receiving the power signal and the LVDS signal transmitted by the receiving card.

[0010] In some embodiments of this application, the receiving card includes an output interface, which is a Type-C interface; the interface unit is a Type-C interface, and the output interface and the interface unit of the display interface module are electrically connected via a Type-C cable.

[0011] In some embodiments of this application, the receiving card includes multiple output interfaces, and multiple LED display modules are provided, which are spliced ​​together; each of the multiple LED display modules is provided with a display interface module, and the multiple display interface modules are respectively connected to the multiple output interfaces of the receiving card through a Type-C cable.

[0012] In some embodiments of this application, the receiving card includes a power input port for connecting to an external power source to receive the power signal.

[0013] In some embodiments of this application, the transmitting box is capable of converting the video signal into an Ethernet signal, and the receiving card includes a network port for receiving the Ethernet signal.

[0014] In some embodiments of this application, the receiving card further includes an FPGA chip, which is used to convert the Ethernet signal into an LVDS signal.

[0015] As can be seen from the above technical solution, the beneficial effects of the present invention are as follows: In the display interface module and LED display system of the present invention, the interface unit in the display interface module can simultaneously receive power signals and LVDS signals, and the output unit can simultaneously transmit power signals and TTL signals, realizing the compatibility of signal transmission and power transmission, effectively reducing the number of cables and operation steps for on-site installation, and reducing human resource input and installation time; at the same time, the signal conversion unit can convert LVDS signals into TTL signals, effectively adapting to the TTL signal requirements of the LED display module, ensuring the smoothness of signal transmission; in addition, the display interface module includes a storage unit, which can be used to store the calibration data of the LED display module, eliminating the need to set up an independent calibration storage circuit on the LED display module, saving redundant components and circuit design, reducing hardware costs, and facilitating the optimization of product structure. Attached Figure Description

[0016] Figure 1 This is a structural block diagram of an embodiment of the display interface module of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of an embodiment of the display interface module of the present invention.

[0018] Figure 3 This is a schematic diagram of the pin structure of the display interface module and the signal conversion chip in the display interface module of the present invention.

[0019] Figure 4 This is a structural block diagram of an embodiment of the LED display system of the present invention.

[0020] Figure 5 This is a schematic diagram of the receiving card in one embodiment of the LED display system of the present invention.

[0021] The reference numerals in the attached figures are explained as follows: 100, LED display system; 10, display interface module; 20, LED display module; 30, transmitting box; 40, receiving card; 41, output interface; 42, power input port; 43, FPGA chip; 44, network port; 50, Type-C cable; 11, interface unit; 12, signal conversion unit; 121, signal conversion chip; 122, conversion circuit; 13, storage unit; 14, output unit; 141, output pin; 200, host computer. Detailed Implementation

[0022] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0023] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back, etc.) are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0024] 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 the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] See Figure 1 and Figure 2 One embodiment of this application provides a display interface module 10, which is used in an LED display module 20. The display interface module 10 of this application includes an interface unit 11, a signal conversion unit 12, a storage unit 13, and an output unit 14.

[0026] The interface unit 11 receives power signals and LVDS signals. The signal conversion unit 12 is connected to the interface unit 11 and receives the LVDS signals and converts them into TTL signals. The storage unit 13 stores the calibration data of the LED display module 20. The output unit 14 is electrically connected to the signal conversion unit 12 and transmits the power signals and TTL signals to the LED display module 20.

[0027] For the display interface module 10 of this application, the interface unit 11 can simultaneously receive power signals and LVDS signals, and the output unit 14 can simultaneously transmit power signals and TTL signals, realizing the compatibility of signal transmission and power transmission, effectively reducing the number of cables and operation steps for on-site installation, and reducing manpower input and installation time; at the same time, the signal conversion unit 12 can convert LVDS signals into TTL signals, effectively adapting to the TTL signal requirements of the LED display module 20, ensuring the smoothness of signal transmission; in addition, the display interface module 10 includes a storage unit 13, which can be used to store the calibration data of the LED display module 20, eliminating the need to set up an independent calibration storage circuit on the LED display module 20, saving redundant components and circuit design, reducing hardware costs, and facilitating the optimization of product structure.

[0028] In some embodiments of this application, the interface unit 11 can be a Type-C interface, which can be connected to the Type-C cable 50.

[0029] Compared to the separate DC power interface and independent signal interface in related technologies, setting the interface unit 11 as a Type-C interface can integrate the two transmission requirements into a single interface. With the Type-C cable 50, the step of connecting a separate power cable is eliminated, which can further reduce the installation complexity and simplify the overall structure of the product.

[0030] Furthermore, the Type-C interface, when used with the Type-C cable 50, supports reversible insertion, eliminating the need for users to distinguish the interface direction during installation. This allows for quick connection, reducing installation time and operational errors, and is especially suitable for scenarios with complex on-site installation environments and limited operating space.

[0031] In some embodiments of this application, such as Figure 2 As shown, the signal conversion unit 12 may include a signal conversion chip 121 and a conversion circuit 122. The conversion circuit 122 may be disposed around the signal conversion chip 121. The input terminal of the conversion circuit 122 is electrically connected to the interface unit 11 and is capable of receiving the LVDS signal transmitted by the interface unit 11. The output terminal of the conversion circuit 122 can be connected to the signal conversion chip 121 to input the LVDS signal into the signal conversion chip 121.

[0032] In some examples, the conversion circuit 122 can be a filter circuit and / or a bias circuit. The filter circuit can filter out high-frequency noise in the LVDS signal, achieving the function of filtering and noise reduction. The bias circuit can adjust the voltage of the LVDS signal to the preset input range of the signal conversion chip 121, avoiding damage or false triggering of the internal circuit of the signal conversion chip 121 due to excessively high or low input voltage.

[0033] The signal conversion chip 121 has a built-in signal processing circuit that can convert LVDS signals into TTL signals required by the driver chip of LED display module 20.

[0034] In some examples, such as Figure 3 As shown, the signal conversion chip 121 may include multiple data signal pins (DATA1-DATA12), clock signal pins (CLK), and control signal pins (OE, LAT).

[0035] The multi-channel data signal pins can be used for the transmission of multi-channel TTL signals to realize the transmission of pixel data of the LED display module 20. Each data signal pin corresponds to a column of pixel drive signals in the LED display module 20. The clock signal pins provide a synchronous clock for the pixel data transmitted by the multi-channel data signal pins, ensuring consistent data transmission timing.

[0036] The control signal pins include an enable signal pin (OE) and a latch signal pin (LAT). The enable signal pin controls the on / off state of the driver chip of the LED display module 20; for example, a high level enables the LED display module 20 to display, and a low level disables it. The latch signal pin triggers the driver chip to latch the pixel data input from multiple data signal pins, ensuring that each frame of image data is stable before display.

[0037] Furthermore, in some embodiments of this application, the display interface module 10 may include a VCC pin and a GND pin. The power signal can be directly transmitted from the interface unit 11 to the VCC pin, providing power to the display interface module 10. The GND pin enables the display interface module 10 to be grounded. This configuration ensures that the power signal, during transmission, does not pass through the signal conversion chip 121 and its signal processing circuit, guaranteeing that the power signal is transmitted to the VCC pin without additional loss or delay.

[0038] In this application, the signal conversion unit 12 is electrically connected to the output unit 14, and the signal conversion chip 121 can transmit the converted TTL signal to the output unit 14 through its internal signal output port.

[0039] like Figure 2 As shown, in some embodiments of this application, the output unit 14 may include a plurality of output pins 141, which may be soldered and fixed to the LED display module 20.

[0040] The signal conversion chip 121 can be connected to the output pin 141 through its data signal pin to distribute the converted TTL signal to each output pin 141, and can be transmitted to the driver chip of the LED display module 20 through the output pin 141.

[0041] The output pin 141 is fixed to the LED display module 20 by soldering, which makes the connection more secure and the contact resistance lower. This avoids problems such as power interruption and voltage fluctuation caused by loose interface during long-term use, and ensures that the LED display module 20 continues to work stably.

[0042] In some examples, the VCC pin of the display interface module 10 can be connected to the output pin 141 to transmit power signals to the LED display module 20 through the output pin 141, thereby powering the LED display module 20.

[0043] This configuration eliminates the need for an additional power output interface 41 in the display interface module 10. It also reduces the wiring of the circuit board for independent power conduction lines inside the display interface module 10, making the structure of the display interface module 10 more streamlined and smaller in size, which is beneficial for simplifying the overall structure design of the LED display screen.

[0044] In actual assembly, the signal and power connection can be completed simultaneously by simply soldering the output pin 141 to the LED display module 20, eliminating the need for a separate power interface connection, shortening installation time and reducing the error rate.

[0045] like Figure 1 As shown in the figure, in this application, the display interface module 10 also includes a storage unit 13, which is used to store the calibration data of the display module. The storage unit 13 can support updating the calibration data. If the LED display module 20 experiences problems such as brightness decay or color difference, new calibration data can be re-entered through the display interface module 10, thereby eliminating the need to replace the LED display module 20 and extending the product's lifespan.

[0046] In some embodiments of this application, the storage unit 13 may be integrated with the signal processing circuit of the signal conversion chip 121.

[0047] While converting LVDS signals, the signal processing circuit can retrieve the correction data from the embedded storage unit 13 in real time to realize signal conversion, data correction and signal output processing. This avoids the timing difference of converting the signal first and then reading the data, making the correction of each pixel more accurate, thereby ensuring that the brightness and color uniformity of the LED display module 20 are further improved.

[0048] Furthermore, the integrated signal processing circuit of the storage unit 13 and the signal conversion chip 121 eliminates the need for separate storage chips and peripheral connection components, and reduces the circuit board wiring between chips, effectively simplifying the overall structure of the display interface module 10.

[0049] Furthermore, such as Figure 4 As shown, one embodiment of this application also provides an LED display system 100, which includes an LED display module 20, a transmitter box 30, a receiver card 40, and a display interface module 10. The specific structure of the display interface module 10 has been described above and will not be repeated here.

[0050] Specifically, the transmitting box 30 is used to receive and convert video signals. The receiving card 40 is electrically connected to the transmitting box 30, and is used to receive the video signals converted by the transmitting box 30 and can convert them into LVDS signals. The display interface module 10 is electrically connected to the receiving card 40 via a cable, and the display interface module 10 can receive the power signals and LVDS signals transmitted by the receiving card 40.

[0051] For the LED display system 100 of this application, the display interface module 10 and the receiver card 40 are electrically connected via cables, enabling integrated transmission of power signals and LVDS signals. This eliminates the need for separate power and signal lines, effectively simplifying the on-site installation process, reducing wiring steps and operational errors, and lowering installation manpower and time consumption. Furthermore, the receiver card 40 can further convert the video signal converted by the transmitter box 30 into an LVDS signal for transmission. This signal transmission method requires only four lines, significantly reducing the number of cables and signal crosstalk. Simultaneously, LVDS signals possess low electromagnetic radiation and high anti-interference characteristics, effectively resisting electromagnetic interference in the installation environment and ensuring the integrity of long-distance video signal transmission.

[0052] The LVDS signal output by the receiver card 40 can be converted into a TTL signal after passing through the display interface module 10. With the setting of the correction data in the storage unit 13 of the display interface module 10, it can provide pixel-level correction data for the LED display module 20, effectively compensate for the individual differences between the LED display modules 20, solve the problems of bright spots, dark spots and color differences when multiple LED display modules 20 are spliced, and effectively improve the brightness uniformity of the entire LED display screen.

[0053] like Figure 5 As shown, in some embodiments of this application, the receiving card 40 may include an output interface 41, which is a Type-C interface. The interface unit 11 of the display interface module 10 is a Type-C interface, and the output interface 41 and the interface unit 11 are electrically connected through a Type-C cable 50.

[0054] The Type-C cable 50 supports reversible insertion, eliminating the need to distinguish the interface direction during on-site installation. Even in scenarios with limited operating space, it can quickly connect the receiver card 40 and the display interface module 10, effectively reducing installation time and operational errors, improving installation and maintenance convenience, and lowering system operating costs.

[0055] In some examples, the receiver card 40 may include multiple output interfaces 41. Multiple LED display modules 20 are provided and connected together. Each of the multiple LED display modules 20 has a display interface module 10, and each display interface module 10 is connected to one of the multiple output interfaces 41 of the receiver card 40 via a Type-C cable 50.

[0056] The receiver card 40 is equipped with multiple output interfaces 41, and can simultaneously connect multiple display interface modules 10 through multiple Type-C cables 50, thereby driving multiple LED display modules 20. This effectively realizes the splicing of multiple LED display modules 20 without the need for additional signal distributors, power distributors, or other related structures. The splicing expansion structure is simple and the splicing is convenient and quick.

[0057] Furthermore, the power signals and LVDS signals of multiple LED display modules 20 come from the same receiver card 40 and are transmitted independently through multiple Type-C cables 50. Each Type-C cable 50 carries independent LVDS and power signals, which makes the power supply voltage and signal timing of each LED display module 20 completely synchronized, ensuring consistent signal transmission stability across the entire screen and ensuring seamless connection and uniform color of the spliced ​​image.

[0058] In some embodiments of this application, the receiving card 40 may include a power input port 42 for connecting to an external power source to receive a power signal. The power signal can be transmitted to the display interface module 10 via a Type-C cable 50, so that the power signal can power the display interface module 10 and the LED display module 20.

[0059] Combination Figure 4 and Figure 5 As shown, the host computer 200 can transmit video signals to the transmitting box 30. In some embodiments of this application, the transmitting box 30 can convert the video signal into an Ethernet signal. In this embodiment, the receiving card 40 may include a network port 44, which is used to receive Ethernet signals. This network port 44 can be connected to the transmitting box 30 via a network cable.

[0060] In some examples, the receiver card 40 may also include an FPGA chip 43, which is used to convert Ethernet signals into LVDS signals.

[0061] LVDS signals can be transmitted to display interface module 10 via Type-C cable 50. Display interface module 10 can convert LVDS signals into TTL signals and transmit the TTL signals to the driver chip of LED display module 20.

[0062] In the LED display system 100, the host computer 200, such as a computer or video player, can generate or acquire video signals and transmit them to the transmitting box 30. After receiving the video signal from the host computer 200, the transmitting box 30 encodes it into an Ethernet signal using its internal conversion circuit 122. The Ethernet signal is then transmitted via a network cable to the network port 44 of the receiving card 40. After receiving the Ethernet signal through the network port 44, the receiving card 40 processes it using its built-in FPGA chip 43, converting the Ethernet signal into an LVDS signal.

[0063] The output interface 41 of the receiver card 40 is connected to the interface unit 11 of the display interface module 10 via a Type-C cable 50. The Type-C cable 50 can transmit LVDS signals and power signals to the display interface module 10. The signal conversion chip 121 of the display interface module 10 can convert the LVDS signals into TTL signals that can be recognized by the driver chip of the LED display module 20. The output unit 14 of the display interface module 10 can transmit the TTL signals and power signals to the LED display module 20, so that the driver chip of the LED display module 20 can receive the TTL signals and the power signals can supply power to the LED display module 20.

[0064] For the display interface module and LED display system of this application, the interface unit in the display interface module can simultaneously receive power signals and LVDS signals, and the output unit can simultaneously transmit power signals and TTL signals, realizing the compatibility of signal transmission and power transmission, effectively reducing the number of cables and operation steps for on-site installation, and reducing manpower input and installation time; at the same time, the signal conversion unit can convert LVDS signals into TTL signals, effectively adapting to the TTL signal requirements of the LED display module and ensuring the smoothness of signal transmission; in addition, the display interface module includes a storage unit, which can be used to store the calibration data of the LED display module, eliminating the need to set up an independent calibration storage circuit on the LED display module, saving redundant components and circuit design, reducing hardware costs, and facilitating the optimization of product structure.

[0065] In LED display systems, the display interface module and the receiver card are electrically connected via cables, enabling integrated transmission of power and LVDS signals. This eliminates the need for separate power and signal lines, effectively simplifying the on-site installation process, reducing wiring steps and operational errors, and lowering installation manpower and time consumption. Furthermore, the receiver card can further convert the video signal converted by the transmitter box into an LVDS signal for transmission. This signal transmission method requires only four lines, significantly reducing the number of cables and signal crosstalk. Simultaneously, LVDS signals possess low electromagnetic radiation and high anti-interference characteristics, effectively resisting electromagnetic interference in the installation environment and ensuring the integrity of long-distance video signal transmission.

[0066] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A display interface module for an LED display module, characterized in that, The display interface module includes: The interface unit is used to receive power signals and LVDS signals; A signal conversion unit, connected to the interface unit, is used to receive the LVDS signal and convert the LVDS signal into a TTL signal; Storage unit, used to store the calibration data of the LED display module; The output unit is electrically connected to the signal conversion unit and is used to transmit the power signal and the TTL signal to the LED display module.

2. The display interface module according to claim 1, characterized in that, The signal conversion unit includes a signal conversion chip and a conversion circuit. The conversion circuit is electrically connected to the interface unit and the signal conversion chip. The signal conversion chip is used to convert the LVDS signal into a TTL signal; and / or, the storage unit is integrated with the signal conversion chip.

3. The display interface module according to claim 1, characterized in that, The output unit includes an output pin, which is soldered and fixed to the LED display module, and is electrically connected to the driver chip of the LED display module.

4. The display interface module according to claim 1, characterized in that, The interface unit is a Type-C interface.

5. An LED display system, characterized in that, include: LED display module; Transmitter box, used to receive and convert video signals; A receiver card, electrically connected to the transmitter box, is used to receive the video signal converted by the transmitter box and can convert it into an LVDS signal; The display interface module as described in any one of claims 1-4 is electrically connected to the receiving card via a cable, and the display interface module is capable of receiving the power signal and the LVDS signal transmitted by the receiving card.

6. The LED display system according to claim 5, characterized in that, The receiving card includes an output interface, which is a Type-C interface; the interface unit is a Type-C interface, and the output interface and the interface unit of the display interface module are electrically connected by a Type-C cable.

7. The LED display system according to claim 6, characterized in that, The receiving card includes multiple output interfaces, and the LED display modules are provided in multiple ways, which are spliced ​​together; each of the multiple LED display modules is provided with a display interface module, and the multiple display interface modules are respectively connected to the multiple output interfaces of the receiving card through a Type-C cable.

8. The LED display system according to claim 5, characterized in that, The receiving card includes a power input port for connecting to an external power source to receive the power signal.

9. The LED display system according to claim 5, characterized in that, The transmitting box can convert the video signal into an Ethernet signal, and the receiving card includes a network port for receiving the Ethernet signal.

10. The LED display system according to claim 9, characterized in that, The receiver card also includes an FPGA chip, which is used to convert the Ethernet signal into an LVDS signal.

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