LED display screen with signal transmission interlocking device

Abstract

The invention provides an LED display screen with a signal transmission interlocking device, and belongs to the technical field of LED display screens, the LED display screen comprises a box body, and the box body comprises a first box split body and a second box split body; an interlocking device is arranged between the first box body and the second box body; the HUB board comprises a control card and a first signal interface, and the control card is used for transmitting a data signal and a control signal to the display module; the control card comprises a data signal receiving module and a signal output module; the control card receives an image signal output by the control computer through the first signal interface; a signal output module of the control card is connected with the display module through a driving chip and transmits an image signal to the display module; a wiring port is reserved in the connecting position of the first box body and the second box body and used for controlling a computer to be connected with a first signal interface of the HUB board. The interlocking device ensures the connection stability of the first box body and the second box body, and is beneficial to the stability of signal transmission.

Description

Technical Field

[0001] The present invention belongs to the technical field of LED display screens, and particularly relates to an LED display screen with a signal transmission interlocking device. Background Art

[0002] As a device that presents information such as text and images through a semiconductor light-emitting diode display control method, the LED display screen is widely used in many fields such as advertising, information release, stage performances, and traffic guidance due to its high brightness, long life, low power consumption, and rich colors.

[0003] With the continuous growth of market demand, higher requirements are also put forward for the stability, reliability, and convenient maintenance of LED display screens. The display modules of traditional LED display screens are connected to a control computer through data lines and control lines to receive image signals and control signals, thereby realizing image display. However, with the increase in the size and resolution of LED display screens, traditional connection methods have gradually exposed some problems, restricting the further development of LED display screens.

[0004] Traditional LED display screen boxes mostly adopt a simple splicing connection method. In the actual use process, it is difficult to ensure the firmness of the connection, and loosening is likely to occur. Once the box connection is loose, it will not only affect the stability of the overall structure of the display screen, but may also cause the internal wiring to loosen, thereby resulting in signal transmission interruption and affecting the display effect.

[0005] Therefore, the present invention proposes an LED display screen with a signal transmission interlocking device. Summary of the Invention

[0006] The present invention provides an LED display screen with a signal transmission interlocking device to at least solve the problem in the prior art that the stability of the overall structure of the display screen is affected due to the loosening of the box connection.

[0007] An embodiment of the present application provides an LED display screen with a signal transmission interlocking device, including a box body, a HUB board, and a display module. The HUB board is located between the box body and the display module; the box body is a split structure, including a first box split and a second box split; An interlocking device is provided between the first box split and the second box split, and the interlocking device is used to interlock the first box split and the second box split; The HUB board includes a control card and a first signal interface. The control card is connected to the display module and is used to transmit data signals and control signals to the display module; The control card includes a data signal receiving module and a signal output module; The control card is connected to the first signal interface through the data signal receiving module, and receives the image signal output by the control computer through the first signal interface; The signal output module of the control card is connected to the display module through a driving chip, and transmits the image signal to the display module; A wiring port is reserved at the connection between the first box body and the second box body, and the wiring port is used for the control computer to connect to the first signal interface of the HUB board. The image signal output by the control computer is transmitted to the control card through the first signal interface. The control card receives the image signal through the data signal receiving module, and transmits the image signal to the display module through the driving chip through the signal output module. The display module is used to display images. An interlocking device is provided between the first box body and the second box body, and the interlocking device is used to interlock the first box body and the second box body to ensure the firm connection between the first box body and the second box body, and avoid the loosening of the wiring port caused by the insecure connection between the first box body and the second box body, thereby preventing the interruption of signal transmission, which is helpful for the stability of signal transmission.

[0008] Further, the interlocking device includes a magnet and a latch; The magnets are arranged in pairs between the first box body and the second box body, and the two magnets arranged in pairs are magnetically attracted to each other to lock the first box body and the second box body; The latch is used to lock the first box body and the second box body.

[0009] Further, the control card further includes a control signal receiving module; The control card is connected to the control computer through the control signal receiving module, is used to receive the control signal output by the control computer, and transmits the control signal to the display module through the signal output module; The control signal receiving module includes LINE_A pins and LINE_B pins, and is used to receive the line scan control signal; The control signal further includes DCLK pins, GCLK pins, and LE pins, and is used to receive the clock control signal.

[0010] Further, the HUB board further includes a power module; The power module is connected to the power input terminal of the control card and is used to supply power to the control card.

[0011] Further, the power module includes a power input unit, a voltage conversion unit, and a power output unit; A power wiring port is also reserved at the connection between the first box body and the second box body, and is used for the 4.2V power supply to connect to the power input unit of the power module of the HUB board; The power input unit is connected to a 4.2V power supply. The voltage conversion unit converts the 4.2V power supply into a 3.3V power supply. The power output unit is connected to the power input terminal of the control card to provide a 3.3V power supply for the control card.

[0012] Further, the voltage conversion unit includes a JWH6344 chip, an inductor L1, a voltage feedback sub-unit, and a switching frequency adjustment sub-unit. The JWH6344 chip includes a VIN pin, an SW pin, an FB pin, a COMP pin, a UGATE pin, an LGATE pin, and an ILIM pin. The VIN pin is used to connect to the power input unit, the SW pin is used to connect to the first end of the inductor L1, and the second end of the inductor L1 is connected to the power output unit; The voltage feedback sub-unit includes a capacitor C16, a resistor R10, a resistor R19, a capacitor C18, and a capacitor C21. The first end of the resistor R10 is connected to the FB pin, the resistor R19, and the capacitor C21. The second end of the resistor R10 is connected to the first end of the capacitor C16, and the second end of the capacitor C16 is connected to the first end of the inductor L1; The second end of the resistor R19 is connected to the first end of the capacitor C18, and the second ends of the capacitor C18 and the capacitor C21 are both connected to the COMP pin; The switching frequency adjustment sub-unit includes a main switch MOSFET, a resistor R2, a capacitor C6, a capacitor C7, a capacitor C8, a synchronous rectifier MOSFET, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor R9; The gate G of the main switch MOSFET is connected to the first end of the resistor R2, and the second end of the resistor R2 is connected to the UGATE pin; The drain D of the main switch MOSFET is respectively connected to the first ends of the capacitor C6, the capacitor C7, and the capacitor C8. The first ends of the capacitor C6, the capacitor C7, and the capacitor C8 are also connected to the VIN pin. The second ends of the capacitor C6, the capacitor C7, and the capacitor C8 are all grounded; The source S of the main switch MOSFET is connected to the drain D of the synchronous rectifier MOSFET. The drain D of the synchronous rectifier MOSFET and the source S of the main switch MOSFET are both connected to the first end of the inductor L1. The gate G of the synchronous rectifier MOSFET is connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the LGATE pin. The source S of the synchronous rectifier MOSFET is respectively connected to the first ends of the resistor R5, the resistor R6, the resistor R7, and the resistor R9. The second ends of the resistor R5 and the resistor R9 are both connected to the ILIM pin, and the second ends of the resistor R6 and the resistor R7 are both grounded.

[0013] Further, the power input unit includes capacitors C1, C2, C3, C4, and C5 connected in parallel with each other. The first ends of capacitor C1, capacitor C2, capacitor C3, capacitor C4, and capacitor C5 are all connected to a 4.2V power supply and to the VIN pin of the voltage conversion unit; the second ends of capacitor C1, capacitor C2, capacitor C3, capacitor C4, and capacitor C5 are all grounded.

[0014] Further, the power output unit includes output capacitors C11, C12, C13, C14, and C15 connected in parallel with each other. The first ends of output capacitor C11, output capacitor C12, output capacitor C13, output capacitor C14, and output capacitor C15 are all connected to the second end of the inductor L1 and to the power input of the control card. The second ends of output capacitor C11, output capacitor C12, output capacitor C13, output capacitor C14, and output capacitor C15 are all grounded.

[0015] Further, the data signal receiving module includes: HA_CN pin, HA_CP pin, HA_D0N pin, HA_D0P pin, HA_D1N pin, HA_D1P pin, HA_D2N pin, HA_D2P pin; The HA_CN pin, HA_CP pin, HA_D0N pin, HA_D0P pin, HA_D1N pin, HA_D1P pin, HA_D2N pin, and HA_D2P pin are all connected to the first signal interface; The HUB board further includes a second signal interface. The control card is connected to the second signal interface through the data signal receiving module and receives the image signal output by the control computer through the second signal interface; The data signal receiving module further includes: HB_CN pin, HB_CP pin, HB_D0N pin, HB_D0P pin, HB_D1N pin, HB_D1P pin, HB_D2N pin, HB_D2P pin; The HB_CN pin, HB_CP pin, HB_D0N pin, HB_D0P pin, HB_D1N pin, HB_D1P pin, HB_D2N pin, and HB_D2P pin are all connected to the second signal interface.

[0016] Further, the control card uses a control chip with the model ICND6603; The driver chip uses a chip with the model 74HC245.

[0017] As can be seen from the above technical solutions, the present invention has the following advantages: In the LED display screen with a signal transmission interlock device provided by the present application, an interlock device is provided between the first box body and the second box body. The interlock device is used to interlock the first box body and the second box body to ensure the stability of the connection between the first box body and the second box body, and to prevent the connection between the first box body and the second box body from being loose, which may cause the wiring port to become loose and further lead to signal transmission interruption, thus contributing to the stability of signal transmission.

[0018] By providing a HUB board between the box body and the display module and integrating the control card and the first signal interface on the HUB board, centralized control of the display module is achieved, the wiring is simplified, and the signal transmission efficiency is improved, solving the problems of low signal transmission efficiency and high control complexity of traditional LED display screens.

[0019] The control card is connected to the first signal interface through the data signal receiving module, receives the image signal and control signal output by the control computer, and transmits the image signal to the display module through the driving chip, improving the stability and reliability of signal transmission.

[0020] A power supply module is provided on the HUB board, including a power input unit, a voltage conversion unit and a power output unit, which can convert the 4.2V power supply into a 3.3V power supply to provide stable power for the control card, improving the efficiency and reliability of power management. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the present application, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a structural diagram of the LED display screen with a signal transmission interlock device of the present invention.

[0023] Figure 2 It is a circuit principle block diagram of the LED display screen with a signal transmission interlock device of the present invention.

[0024] Figure 3 It is a circuit diagram of the control card of the LED display screen with a signal transmission interlock device of the present invention.

[0025] Figure 4 It is a circuit diagram of the power supply module of the LED display screen with a signal transmission interlock device of the present invention.

[0026] Figure 5Circuit diagram of the first signal interface of the LED display screen with a signal transmission interlock device according to the present invention.

[0027] Figure 6 Circuit diagram of the second signal interface of the LED display screen with a signal transmission interlock device according to the present invention. Detailed implementation manners

[0028] In the following, various embodiments of the present disclosure will be more fully described in the LED display screen with a signal transmission interlock device, which will be described in detail below. The present disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but the present disclosure should be understood to cover all adjustments, equivalents, and / or alternative solutions falling within the spirit and scope of the various embodiments of the present disclosure.

[0029] In the following, the term "comprising" or "may comprise" that may be used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Further, as used in various embodiments of the present disclosure, the terms "comprising", "having" and their cognates are only intended to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing items, and should not be construed as precluding the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items first.

[0030] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the listed words. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0031] Expressions (such as "first", "second", etc.) used in various embodiments of the present disclosure may modify various components in various embodiments, but do not limit the corresponding components. For example, the above expressions do not limit the order and / or importance of the components. The above expressions are only for the purpose of distinguishing one element from other elements. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0032] It should be noted that: If a description states that a component is "connected" to another component, the first component can be directly connected to the second component, and a third component can be "connected" between the first component and the second component. Conversely, when a component is "directly connected" to another component, it can be understood that there is no third component between the first component and the second component.

[0033] The term "user" used in various embodiments of the present disclosure may refer to a person using an electronic device, which can be a monitoring person, a tester, or an operator.

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] The embodiments of the present application provide an LED display screen with a signal transmission interlock device, which solves the technical problem that there is an urgent need to realize the stability of the overall structure of the display screen affected by the loose connection of the boxes in the traditional LED display screen.

[0036] Next, the technical solutions proposed in the embodiments of the present application will be described in detail through the accompanying drawings.

[0037] Figure 1 is a structural diagram of the LED display screen, Figure 2 is a schematic block diagram of an LED display screen with a signal transmission interlock device provided by an embodiment of the present application. As Figure 1 and Figure 2 shown, an LED display screen with a signal transmission interlock device provided by an embodiment of the present application includes a box, a HUB board, and a display module. The HUB board is located between the box and the display module; the box is a split structure, including a first box split 1 and a second box split 2; an interlock device is provided between the first box split 1 and the second box split 2, and the interlock device is used to interlock the first box split 1 and the second box split 2.

[0038] The HUB board includes a control card and a first signal interface. The control card is connected to the display module and is used to transmit data signals and control signals to the display module; the control card includes a data signal receiving module and a signal output module; the control card is connected to the first signal interface through the data signal receiving module and receives the image signal output by the control computer through the first signal interface; the signal output module of the control card is connected to the display module through a driving chip and transmits the image signal to the display module.

[0039] A wiring port 3 is reserved at the connection between the first box body part 1 and the second box body part 2. The wiring port 3 is used for the control computer to connect to the first signal interface of the HUB board. An interlock device is provided between the first box body part 1 and the second box body part 2. The interlock device is used to interlock the first box body part 1 and the second box body part 2 to ensure the stability of the connection between the first box body part 1 and the second box body part 2, prevent the wiring port 3 from loosening due to the insecure connection between the first box body part 1 and the second box body part 2, and thus avoid the occurrence of signal transmission interruption, which is helpful for the stability of signal transmission.

[0040] Combined with Figure 2 , the image signal output by the control computer is transmitted to the control card through the first signal interface. The control card receives the image signal through the data signal receiving module and transmits the image signal to the display module through the signal output module via the driving chip. The display module is used to display images. By setting the HUB board between the box body and the display module and integrating the control card and the first signal interface on the HUB board, centralized control of the display module is achieved, the wiring is simplified, and the signal transmission efficiency is improved, solving the problems of low signal transmission efficiency and high control complexity of traditional LED display screens.

[0041] The control card is connected to the first signal interface through the data signal receiving module, receives the image signal and control signal output by the control computer, and transmits the image signal to the display module through the driving chip, improving the stability and reliability of signal transmission.

[0042] In addition, when planning the layout of the HUB board, full consideration is given to the convenience of signal transmission and the adaptability to the box body. The connection ports of the signal output module and the connection ports of the first signal interface are accurately set at the upper and lower board edges of the HUB board. At the same time, at the upper and lower edges of the LED box body, positions are also reserved in advance for the connection ports of the signal output module and the connection ports of the first signal interface, and through the way of opening holes, it is ensured that the ports can be smoothly docked. The connection ports of the signal output module and the connection ports of the first signal interface are designed to extend out of the box body, making it more intuitive and easy to operate during external connection; while the connection ports of the signal output module and the connection ports of the first signal interface are flush with the box body, which not only ensures the flatness of the box body appearance but also can protect the ports from unnecessary external collisions and damages to a certain extent.

[0043] The interlock device includes magnets 4 and latches 5; the magnets 4 are arranged in pairs between the first box body part 1 and the second box body part 2, and the two magnets 4 arranged in pairs magnetically attract each other to lock the first box body part 1 and the second box body part 2; The latch 5 is used to lock the first box body part 1 and the second box body part 2. The latch 5 can be set according to the usage situation.

[0044] The control card further includes a control signal receiving module; the control card is connected to a control computer through the control signal receiving module, and is used to receive the control signal output by the control computer and transmit the control signal to the display module through the signal output module; the control signal receiving module includes LINE_A pin and LINE_B pin for receiving row scanning control signals; the control signal further includes DCLK pin, GCLK pin, and LE pin for receiving clock control signals.

[0045] The HUB board further includes a power supply module; the power supply module is connected to the power input terminal of the control card and is used to supply power to the control card.

[0046] In this embodiment, the power supply module includes a power input unit, a voltage conversion unit, and a power output unit.

[0047] A power supply connection port 6 is also reserved at the connection between the first box body 1 and the second box body 2 for connecting the power input unit of the power supply module of the HUB board with a 4.2V power supply.

[0048] The power input unit is connected to a 4.2V power supply, the voltage conversion unit converts the 4.2V power supply into a 3.3V power supply, and the power output unit is connected to the power input terminal of the control card to provide a 3.3V power supply for the control card.

[0049] In order to reduce the power consumption under the same brightness per unit area, the power supply module converts the 4.2V power supply into a 3.3V power supply. The advantage of this power supply method is that under the condition of the same brightness, that is, the same current, reducing to this power supply voltage level can theoretically reduce the power consumption value by nearly 20%, meeting the current energy-saving requirements. The power supply part converts the 4.2V power supply voltage of the whole board into 3.3V through the voltage conversion unit to supply power to the control card.

[0050] During use, for example, during maintenance, the staff needs to first unplug the cable of the control computer connected to the HUB board at the connection port 3 and the 4.2V power supply connected to the HUB board at the power supply connection port 6, and then open the lock 5 between the first box body 1 and the second box body 2 before performing maintenance. Disconnect the power supply before maintenance to avoid operators coming into contact with live parts, reduce the risk of electric shock, and ensure personnel safety.

[0051] After the maintenance is completed, the first box body part 1 and the second box body part 2 are attracted by the magnet 4, and the first box body part 1 and the second box body part 2 are locked by the lock catch 5. The interlock device ensures that the first box body part 1 and the second box body part 2 are closed in place. After the first box body part 1 and the second box body part 2 are closed in place, a 4.2V power supply is connected to the power input unit of the power module of the HUB board at the power connection port 6 to complete the power-on. When the first box body part 1 and the second box body part 2 are not closed in place, the 4.2V power supply is not connected to prevent short-circuit problems caused by improper connection between the first box body part 1 and the second box body part 2, reduce the occurrence probability of LED display failures, and improve the stability and reliability of the LED display.

[0052] In addition, when planning the layout of the HUB board, full consideration is given to the convenience of power transmission and the adaptability to the box body. The connection port of the power input end of the control card is accurately set at the upper and lower board edges of the HUB board.

[0053] At the same time, at the upper and lower edges of the LED box body, positions are also reserved in advance for the connection ports of the power input end of the control card. And through the way of opening holes, it is ensured that the ports can be smoothly docked. The connection ports of the power input end are designed to be able to extend out of the box body, so that external connection is more intuitive and easy to operate; while the connection ports of the power input end are flush with the box body, which not only ensures the flatness of the box body appearance, but also can protect the ports from unnecessary external collisions and damages to a certain extent.

[0054] In addition, the box body adopts a magnetic attraction connection method and a buckle fixing method. These connection and fixing methods abandon the previous screw fixing method, which can make the whole box body interlock more convenient and fast, and reduce the installation time.

[0055] Combined Figure 4 , the voltage conversion unit includes a JWH6344 chip, an inductor L1, a voltage feedback sub-unit and a switching frequency adjustment sub-unit. The JWH6344 chip includes a VIN pin, an SW pin, an FB pin, a COMP pin, a UGATE pin, an LGATE pin, and an ILIM pin. The VIN pin is used to connect to the power input unit, the SW pin is used to connect to the first end of the inductor L1, and the second end of the inductor L1 is connected to the power output unit; The voltage feedback sub-unit includes a capacitor C16, a resistor R10, a resistor R19, a capacitor C18 and a capacitor C21; the first end of the resistor R10 is connected to the FB pin, the resistor R19 and the capacitor C21; the second end of the resistor R10 is connected to the first end of the capacitor C16, and the second end of the capacitor C16 is connected to the first end of the inductor L1; The second end of the resistor R19 is connected to the first end of the capacitor C18, and the second ends of the capacitor C18 and the capacitor C21 are both connected to the COMP pin; The switching frequency adjustment sub-unit includes a main switch MOSFET, resistor R2, capacitor C6, capacitor C7, capacitor C8, synchronous rectifier MOSFET, resistor R4, resistor R5, resistor R6, resistor R7, and resistor R9; The gate G of the main switch MOSFET is connected to the first end of resistor R2, and the second end of resistor R2 is connected to the UGATE pin; The drain D of the main switch MOSFET is respectively connected to the first ends of capacitor C6, capacitor C7, and capacitor C8. The first ends of capacitor C6, capacitor C7, and capacitor C8 are also connected to the VIN pin. The second ends of capacitor C6, capacitor C7, and capacitor C8 are all grounded; The source S of the main switch MOSFET is connected to the drain D of the synchronous rectifier MOSFET. The drain D of the synchronous rectifier MOSFET and the source S of the main switch MOSFET are both connected to the first end of inductor L1. The gate G of the synchronous rectifier MOSFET is connected to the first end of resistor R4, and the second end of resistor R4 is connected to the LGATE pin. The source S of the synchronous rectifier MOSFET is respectively connected to the first ends of resistor R5, resistor R6, resistor R7, and resistor R9. The second ends of resistor R5 and resistor R9 are both connected to the ILIM pin. The second ends of resistor R6 and resistor R7 are both grounded.

[0056] The synchronous rectifier MOSFET and the main switch MOSFET act as switching elements to control the on and off of the current. During the buck process, the synchronous rectifier MOSFET and the main switch MOSFET switch at a high frequency, enabling the inductor L1 to store and release energy, thereby achieving voltage conversion.

[0057] When the synchronous rectifier MOSFET and the main switch MOSFET are conducting, the input voltage is applied across the inductor L1, and the inductor L1 starts to store energy; when the synchronous rectifier MOSFET and the main switch MOSFET are turned off, the energy in the inductor L1 is released to the power output unit to maintain the output voltage.

[0058] The conduction and cutoff of the synchronous rectifier MOSFET and the main switch MOSFET control the charging and discharging process of the inductor L1, thereby controlling the output current. By adjusting the switching frequency and duty cycle of the synchronous rectifier MOSFET and the main switch MOSFET, the output voltage and current can be precisely controlled.

[0059] In a synchronous rectifier buck converter, using a synchronous rectifier MOSFET and a main switch MOSFET instead of a traditional freewheeling diode can reduce energy loss and improve conversion efficiency. The synchronous rectifier MOSFET conducts when the main switch MOSFET is turned off, providing a current freewheeling path.

[0060] The synchronous rectifier MOSFET and the main switch MOSFET integrate protection functions. When an abnormal situation is detected, the synchronous rectifier MOSFET and the main switch MOSFET quickly turn off to protect the circuit from damage.

[0061] The main switch MOSFET is connected between the VIN pin and the inductor L1, while the synchronous rectifier MOSFET is connected between the inductor L1 and the ground. The synchronous rectifier MOSFET and the main switch MOSFET work together to achieve the charging and discharging process of the inductor, thereby controlling the output voltage and current.

[0062] Combined Figure 3 , the JWH6344 chip includes the following pins: The VIN pin is the input voltage pin, which receives the external power supply input.

[0063] The SYNCIN pin is the synchronous input pin, and the SYNCOUT pin is the synchronous output pin, which are used to synchronize the switching frequencies of multiple converters and reduce electromagnetic interference.

[0064] The VCC pin is the chip power supply pin, which provides the working voltage for the internal circuit of the chip. The PG pin is the power good indication pin, which outputs a high-level signal when the output voltage reaches 90% of the set value. The VCCSET pin is the internal voltage setting pin, which is used to set the internal voltage of the chip.

[0065] The EN pin is the enable pin, which is used to control the enabling and disabling of the chip. When the EN pin is at a high level, the chip works, and when it is at a low level, the chip is turned off. The LGATE pin is the low-side gate drive pin, which is used to drive the gate of the low-side MOSFET. The UGATE pin is the high-side gate drive pin, which is used to drive the gate of the high-side MOSFET. The ILIM pin is the current limit pin, which is used to set the current limit threshold.

[0066] The RT pin is the real-time adjustment pin, which is used to adjust the output voltage in real time.

[0067] The SS pin is the soft start pin, which realizes soft start through an external capacitor to prevent excessive current during startup.

[0068] The PAD pin is the heat sink pad, which is used for heat dissipation.

[0069] The AGND pin is the analog ground pin, which is used for grounding of the analog circuit.

[0070] The EP pin is the external power pin, which is used for heat dissipation.

[0071] The PGND pin is the power ground pin, which is used for grounding of the power circuit.

[0072] The COMP pin is the compensation pin, which is used to set the compensation network of the feedback loop. The FB pin is the feedback pin, which is used to monitor the output voltage and feedback it to the inside of the chip to regulate the output voltage. The COMP pin and the FB pin together form a compensation network to stabilize the control loop. The SW pin is the switch node pin, which is connected to the drain of the high-side MOSFET. The BST pin is the bootstrap pin, which is used to charge the bootstrap capacitor of the high-side MOSFET gate drive circuit.

[0073] Combined with Figure 4 , the power input unit includes capacitors C1, C2, C3, C4, and C5 connected in parallel with each other. The first ends of capacitor C1, capacitor C2, capacitor C3, capacitor C4, and capacitor C5 are all connected to the 4.2V power supply and connected to the VIN pin of the voltage conversion unit; the second ends of capacitor C1, capacitor C2, capacitor C3, capacitor C4, and capacitor C5 are all grounded; capacitors C1, C2, C3, C4, and C5 are all 10V. The input voltage is filtered through capacitors C1, C2, C3, C4, and C5 to reduce the ripple and noise of the input voltage.

[0074] Combined with Figure 4 , the power output unit includes output capacitors C11, C12, C13, C14, and C15 connected in parallel with each other. The first ends of the output capacitor C11, the output capacitor C12, the output capacitor C13, the output capacitor C14, and the output capacitor C15 are all connected to the second end of the inductor L1 and connected to the power input of the control card. The second ends of the output capacitor C11, the output capacitor C12, the output capacitor C13, the output capacitor C14, and the output capacitor C15 are all grounded. The output capacitors C11, C12, C13, C14, and C15 are used to filter out the ripple of the output voltage and ensure the stability of the output voltage.

[0075] Combined with Figure 3 , the power input of the control card includes pins HA_VDD33_14, HA_VDD33_15, HB_VDD33_24, HB_VDD33_25, D_VDD33_88, D_VDD33_78, D_VDD33_64, D_VDD33_62, D_VDD33_52, and D_VDD33_41.

[0076] In an exemplary embodiment, the control card uses a control chip with the model ICND6603.

[0077] Combined with Figure 3 and Figure 5 , the data signal receiving module includes: HA_CN pin, HA_CP pin, HA_D0N pin, HA_D0P pin, HA_D1N pin, HA_D1P pin, HA_D2N pin, HA_D2P pin; The HA_CN pin, HA_CP pin, HA_D0N pin, HA_D0P pin, HA_D1N pin, HA_D1P pin, HA_D2N pin, and HA_D2P pin are all connected to the first signal interface; Combined with Figure 3 and Figure 6 , the control card is connected to the second signal interface through the data signal receiving module, and receives the image signal output by the control computer through the second signal interface; The data signal receiving module further includes: HB_CN pin, HB_CP pin, HB_D0N pin, HB_D0P pin, HB_D1N pin, HB_D1P pin, HB_D2N pin, HB_D2P pin; The HB_CN pin, HB_CP pin, HB_D0N pin, HB_D0P pin, HB_D1N pin, HB_D1P pin, HB_D2N pin, and HB_D2P pin are all connected to the second signal interface; By adopting signal double backup, it can receive the image signal output by the control computer through the second signal interface when the first signal interface fails, ensuring the stability and reliability of the LED display signal transmission.

[0078] Combined with Figure 3As shown, the signal output module includes: LED_RO / AC_RX_CHO pin, LED_GO / AC_RX_CH1 pin, LED_BO / AC_RX_CH2 pin, LED_R1 / AC_RX_CH3 pin, LED_G1 / L_DOP pin, LED_B1 / L_DON pin, LED_R2 / L_D1P pin, LED_G2 / L_D1N pin, LED_B2 / L_D2P pin, LED_R3 / L_D2N pin, LED_G3 / L_D3P pin, LED_B3 / L_D3N pin, LED_R4 / AC_TX_CHO pin, LED_G4 / L_D4P pin, LED_B4 / L_D4N pin, LED_R5 / L_D5P pin, LED_G5 / L_D5N pin, LED_B5 / L_D6P pin, LED_R6 / L_D6N pin, LED_G6 / L_D7P pin, LED_B6 / L_D7N pin, LED_R7 / DC_TX_CH1 pin, LED_G7 / DC_TX_CH2 pin, LED_B7 / DC_TX_CH3 pin, LED_R8 / M_DC_TX pin, LED_G8 pin, LED_B8 pin, LED_R9 pin, LED_G9 / M_DC_RX pin, LED_B9 / CS0 pin, LED_R10 / CS1 pin, LED_G10 / L_D8P pin, LED_B10 / L_D8N pin, LED_R11 / L_D9P pin, LED_G11 / L_D9N pin, LED_B11 / L_D10P pin, LED_R12 / L_D10N pin, LED_G12 / L_D11P pin, LED_B12 / L_D11N pin, LED_R13 / L_D12P pin, LED_G13 / L_D12N pin, LED_B13 / L_D13P pin, LED_R14 / L_D13N pin, LED_G14 / L_D14P pin, LED_B14 / L_D14N pin, LED_R15 / L_D15P pin, LED_G15 / L_D15N pin, LED_B15 / CS2 pin. All the pins included in the above signal output module are connected to the display module through a driving chip, and are used to transmit image signals to the display module.

[0079] In an exemplary embodiment, the driving chip uses a chip with the model number 74HC245.

[0080] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0081] For those of ordinary skill in the art, according to the teachings of the present invention, it does not require creative labor to design different forms of control circuits. Without departing from the principles and spirit of the present invention, these changes, modifications, substitutions, and variations to the embodiments still fall within the protection scope of the present invention.

Claims

1. An LED display screen with a signal transmission interlock device, comprising a cabinet, a HUB board and a display module, characterized in that, The HUB board is located between the cabinet and the display module; the cabinet is a split structure, including a first cabinet part (1) and a second cabinet part (2); An interlock device is provided between the first cabinet part (1) and the second cabinet part (2), and the interlock device is used to interlock the first cabinet part (1) and the second cabinet part (2); the HUB board includes a control card and a first signal interface, and the control card is connected to the display module for transmitting data signals and control signals to the display module; The control card includes a data signal receiving module and a signal output module; The control card is connected to the first signal interface through the data signal receiving module and receives the image signal output by the control computer through the first signal interface; The signal output module of the control card is connected to the display module through a driving chip and transmits the image signal to the display module; A wiring port (3) is reserved at the connection between the first cabinet part (1) and the second cabinet part (2), and the wiring port (3) is used for the control computer to connect to the first signal interface of the HUB board.

2. The LED display according to claim 1, wherein The interlock device includes a magnet (4) and a lock catch (5); The magnets (4) are arranged in pairs between the first cabinet part (1) and the second cabinet part (2), and the two magnets (4) arranged in pairs are magnetically attracted to each other to lock the first cabinet part (1) and the second cabinet part (2); The lock catch (5) is used to lock the first cabinet part (1) and the second cabinet part (2).

3. The LED display according to claim 2, wherein The control card further includes a control signal receiving module; The control card is connected to the control computer through the control signal receiving module, is used to receive the control signal output by the control computer, and transmits the control signal to the display module through the signal output module; The control signal receiving module includes LINE_A pins and LINE_B pins for receiving line scan control signals; The control signal further includes DCLK pins, GCLK pins, and LE pins for receiving clock control signals.

4. The LED display according to claim 3, characterized in that, The HUB board further includes a power module; The power module is connected to the power input end of the control card for supplying power to the control card.

5. The LED display screen according to claim 4, characterized in that, The power module includes a power input unit, a voltage conversion unit, and a power output unit; A power wiring port (6) is also reserved at the connection between the first cabinet part (1) and the second cabinet part (2) for a 4.2V power supply to connect to the power input unit of the power module of the HUB board; The power input unit is connected to a 4.2V power supply, the voltage conversion unit converts the 4.2V power supply into a 3.3V power supply, and the power output unit is connected to the power input end of the control card to supply 3.3V power to the control card.

6. The LED display screen according to claim 5, wherein, The voltage conversion unit includes a JWH6344 chip, an inductor L1, a voltage feedback sub-unit, and a switching frequency adjustment sub-unit. The JWH6344 chip includes a VIN pin, a SW pin, an FB pin, a COMP pin, a UGATE pin, an LGATE pin, and an ILIM pin. The VIN pin is used to connect to the power input unit, the SW pin is used to connect to the first end of the inductor L1, and the second end of the inductor L1 is connected to the power output unit; The voltage feedback sub-unit includes capacitor C16, resistor R10, resistor R19, capacitor C18, and capacitor C21; the first end of resistor R10 is connected to the FB pin, resistor R19, and capacitor C21; the second end of resistor R10 is connected to the first end of capacitor C16, and the second end of capacitor C16 is connected to the first end of inductor L1; the second end of resistor R19 is connected to the first end of capacitor C18, and the second ends of capacitor C18 and capacitor C21 are both connected to the COMP pin; The switching frequency regulation sub-unit includes a main switch MOSFET, resistor R2, capacitor C6, capacitor C7, capacitor C8, a synchronous rectifier MOSFET, resistor R4, resistor R5, resistor R6, resistor R7, and resistor R9; the gate G of the main switch MOSFET is connected to the first end of resistor R2, and the second end of resistor R2 is connected to the UGATE pin; the drain D of the main switch MOSFET is respectively connected to the first ends of capacitor C6, capacitor C7, and capacitor C8. The first ends of capacitor C6, capacitor C7, and capacitor C8 are also connected to the VIN pin, and the second ends of capacitor C6, capacitor C7, and capacitor C8 are all grounded; the source S of the main switch MOSFET is connected to the drain D of the synchronous rectifier MOSFET, and the drain D of the synchronous rectifier MOSFET and the source S of the main switch MOSFET are both connected to the first end of inductor L1; the gate G of the synchronous rectifier MOSFET is connected to the first end of resistor R4, and the second end of resistor R4 is connected to the LGATE pin; the source S of the synchronous rectifier MOSFET is respectively connected to the first ends of resistor R5, resistor R6, resistor R7, and resistor R9. The second ends of resistor R5 and resistor R9 are both connected to the ILIM pin, and the second ends of resistor R6 and resistor R7 are both grounded.

7. The LED display screen according to claim 6, wherein The power input unit includes capacitors C1, C2, C3, C4, and C5 connected in parallel. The first ends of capacitor C1, capacitor C2, capacitor C3, capacitor C4, and capacitor C5 are all connected to a 4.2V power supply and to the VIN pin of the voltage conversion unit; the second ends of capacitor C1, capacitor C2, capacitor C3, capacitor C4, and capacitor C5 are all grounded.

8. The LED display screen according to claim 7, wherein, The power output unit includes output capacitors C11, C12, C13, C14, and C15 connected in parallel. The first ends of output capacitor C11, output capacitor C12, output capacitor C13, output capacitor C14, and output capacitor C15 are all connected to the second end of inductor L1 and to the power input of the control card. The second ends of output capacitor C11, output capacitor C12, output capacitor C13, output capacitor C14, and output capacitor C15 are all grounded.

9. The LED display screen according to claim 8, characterized in that, The data signal receiving module includes: HA_CN pin, HA_CP pin, HA_D0N pin, HA_D0P pin, HA_D1N pin, HA_D1P pin, HA_D2N pin, HA_D2P pin; The HA_CN pin, HA_CP pin, HA_D0N pin, HA_D0P pin, HA_D1N pin, HA_D1P pin, HA_D2N pin, and HA_D2P pin are all connected to the first signal interface; The HUB board further includes a second signal interface. The control card is connected to the second signal interface through the data signal receiving module and receives the image signal output by the control computer through the second signal interface; The data signal receiving module further includes: HB_CN pin, HB_CP pin, HB_D0N pin, HB_D0P pin, HB_D1N pin, HB_D1P pin, HB_D2N pin, HB_D2P pin; The HB_CN pin, HB_CP pin, HB_D0N pin, HB_D0P pin, HB_D1N pin, HB_D1P pin, HB_D2N pin, and HB_D2P pin are all connected to the second signal interface.

10. The LED display screen according to claim 9, wherein The control card uses a control chip with the model number ICND6603; The driver chip uses a chip with the model number 74HC245.

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