LED display screen and control assembly and control box of LED display screen

Abstract

The utility model provides an LED display screen, and a control assembly and a control box of the LED display screen, the control assembly comprises a control panel which is provided with a power supply control terminal and a first voltage detection terminal, and the control panel can send a power supply control signal to the power supply control terminal according to a detection signal of the first voltage detection terminal; the plug connector is used for being connected with the LED display module in a plug-in mode, and the plug connector is provided with a power supply terminal and a second voltage detection terminal; the power supply circuit is connected between the power supply control terminal and the power supply terminal, a power supply switch is arranged in the power supply circuit, and the power supply switch connects or disconnects the power supply circuit according to a power supply control signal transmitted by the power supply control terminal; and a voltage detection circuit connected between the first voltage detection terminal and the second voltage detection terminal and transmitting a detection signal to the first voltage detection terminal. The technical scheme of the utility model can effectively solve the problem that the detection mode in the related technology cannot carry out pre-judgment before the LED display module is burnt down.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED display technical field, specifically, relate to a kind of LED display screen and the control assembly of LED display screen, control box. BACKGROUND

[0002] In related art, LED display screen has the advantages of high contrast and high color reproduction, and is widely used in various scenes in life.

[0003] LED display screen is generally spliced by multiple LED display modules, in the actual use process of LED display screen, burnout may occur for unknown reasons, affect the display effect of LED display screen, and may cause fire and the like. In order to avoid the influence caused by burnout of LED display module, the existing LED display screen generally sets temperature, smoke and other detection structures, so as to find the module that burns out in time.

[0004] However, the temperature and smoke above can only be detected after the burnout of LED display module, and cannot be predicted before the burnout of LED display module. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a kind of LED display screen and the control assembly of LED display screen, control box, to solve the problem that the detection mode in related art cannot be predicted before the burnout of LED display module.

[0006] In order to achieve the above purpose, according to one aspect of the utility model, a control assembly of LED display screen is provided, comprising: a control board having a power supply control terminal and a first voltage detection terminal, the control board can send a power supply control signal to the power supply control terminal according to the detection signal of the first voltage detection terminal;Plug-in part is used for plug-in connection with LED display module, and the plug-in part has a power supply terminal and a second voltage detection terminal;Power supply circuit is connected between power supply control terminal and power supply terminal, and power supply switch is arranged in power supply circuit, and the power supply switch is turned on or disconnected according to the power supply control signal transmitted by power supply control terminal Power supply circuit;Voltage detection circuit is connected between first voltage detection terminal and second voltage detection terminal and transmits detection signal to first voltage detection terminal.

[0007] Further, the control assembly is used for controlling multiple LED display modules, and the control assembly comprises multiple plug-in parts, multiple power supply circuits and multiple voltage detection circuits, each LED display module is connected with one power supply circuit and one voltage detection circuit through one plug-in part, and the control assembly further comprises a selector, which is connected between the first voltage detection terminal and the multiple voltage detection circuits, to control the multiple voltage detection circuits to be turned on with the first voltage detection terminal in turn.

[0008] Further, the control board further has a selection control terminal, the selection control terminal is connected with the selector and transmits a selection control signal to the selector.

[0009] Further, the voltage detection circuit comprises a voltage dividing circuit, the voltage dividing circuit is used for reducing a voltage value transmitted by the second voltage detection terminal to obtain the detection signal.

[0010] Further, a first end of the voltage dividing circuit is connected with the second voltage detection terminal, a second end of the voltage dividing circuit is grounded, the voltage dividing circuit comprises a first voltage dividing resistor and a second voltage dividing resistor, and the first voltage detection terminal is connected between the first voltage dividing resistor and the second voltage dividing resistor.

[0011] Further, the control assembly further comprises an amplifier, the amplifier is connected between the power supply control terminal and the power supply circuit to amplify the power supply control signal.

[0012] Further, the power supply switch comprises a MOS tube, a source of the MOS tube is connected with the power supply, a drain of the MOS tube is connected with the power supply terminal, and a gate of the MOS tube is connected with the power supply control terminal.

[0013] Further, the power supply circuit further comprises a pull-up resistor connected between the gate of the MOS tube and the power supply; and / or, the power supply circuit further comprises a capacitor connected between the source of the MOS tube and the drain of the MOS tube.

[0014] According to another aspect of the utility model, a kind of control box of LED display screen is provided, including box body, the power supply being arranged in box body and the control assembly being arranged in box body, wherein, control assembly is described above Control assembly.

[0015] According to another aspect of the utility model, a kind of LED display screen is provided, including control assembly and LED display module, wherein, control assembly is described above Control assembly.

[0016] The utility model discloses a technical scheme, control component passes through the plug -in spare and LED display module conduction connection, and control component includes control panel and connects between control panel and plug -in spare power supply circuit and voltage detection circuit, and voltage detection circuit connects between the first voltage detection terminal of control panel and the second voltage detection terminal of plug -in spare, and can transmit detection signal to control panel, and can obtain the working voltage of LED display module based on the detection signal, and then judges whether LED display module is in normal working condition or abnormal working condition, power supply circuit connects between the power supply control terminal of control panel and the power supply terminal of plug -in spare, and control panel sends power supply control signal to the power supply switch in power supply circuit based on detection signal, when LED display module is in normal working condition, makes power supply switch and turns on power supply circuit, makes LED display module can continue working, when LED display module is in abnormal working condition, makes power supply switch and turns off power supply circuit, makes LED display module stop working, avoids the burning of LED display module and even the fire that happens when working in abnormal working condition persistently. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the present application, and are incorporated by reference herein. The embodiments disclosed in the specification and drawings are illustrative of the present application and are not meant to be limiting.

[0018] Figure 1 Fig. 1 shows a schematic diagram of a control panel of an embodiment of the control assembly according to the present application;

[0019] Figure 2 Fig. 2 shows an enlarged view of part of the structure of the control panel of Figure 1 Fig. 3 shows a schematic diagram of a power supply circuit and an amplifier of an embodiment of the control assembly according to the present application;

[0020] Figure 3 Fig. 4 shows a schematic diagram of a voltage detection circuit and a selector of an embodiment of the control assembly according to the present application;

[0021] Figure 4 Fig. 5 shows a schematic diagram of a plug-in spare of an embodiment of the control assembly according to the present application.

[0022] Figure 5 Fig. 5 shows a schematic diagram of a plug-in spare of an embodiment of the control assembly according to the present application.

[0023] In the above description, the following reference signs are used:

[0024] 10. Control board; 11. Power supply control terminal; 12. First voltage detection terminal; 13. Selection control terminal;

[0025] 20. Connector; 21. Power supply terminal; 22. Second voltage detection terminal;

[0026] 30. Power supply circuit; 31. Power supply switch; 32. Pull-up resistor; 33. Capacitor;

[0027] 40. Voltage detection circuit; 41. First voltage divider resistor; 42. Second voltage divider resistor;

[0028] 50. Selector;

[0029] 60. Amplifier. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] like Figures 1 to 5 As shown, this application provides a control component for an LED display screen. An embodiment of the control component includes: a control board 10, a connector 20, a power supply circuit 30, and a voltage detection circuit 40. The control board 10 has a power supply control terminal 11 and a first voltage detection terminal 12. The control board 10 can send a power supply control signal to the power supply control terminal 11 based on the detection signal from the first voltage detection terminal 12. The connector 20 is used for plugging into and connecting with an LED display module. The connector 20 has a power supply terminal 21 and a second voltage detection terminal 22. The power supply circuit 30 is connected between the power supply control terminal 11 and the power supply terminal 21. The power supply circuit 30 includes a power supply switch 31, which turns the power supply circuit 30 on or off based on the power supply control signal transmitted from the power supply control terminal 11. The voltage detection circuit 40 is connected between the first voltage detection terminal 12 and the second voltage detection terminal 22 and transmits a detection signal to the first voltage detection terminal 12.

[0032] The technical scheme is applied, the control component is connected with the LED display module through the plug-in part 20, the control component includes a control panel 10, and a power supply circuit 30 and a voltage detection circuit 40 connected between the control panel 10 and the plug-in part 20, the voltage detection circuit 40 is connected between the first voltage detection terminal 12 of the control panel 10 and the second voltage detection terminal 22 of the plug-in part 20, and can transmit a detection signal to the control panel 10, based on the detection signal, the working voltage of the LED display module can be obtained, and it is judged whether the LED display module is in a normal working state or an abnormal working state (the LED display module may be burned or even on fire after working in the abnormal working state for a period of time); the power supply circuit 30 is connected between the power supply control terminal 11 of the control panel 10 and the power supply terminal 21 of the plug-in part 20, the control panel 10 sends a power supply control signal to the power supply switch 31 in the power supply circuit 30 based on the detection signal, when the LED display module is in a normal working state, the power supply switch 31 is turned on to supply power to the power supply circuit 30, so that the LED display module can continue to work, when the LED display module is in an abnormal working state, the power supply switch 31 is turned off to cut off the power supply circuit 30, so that the LED display module stops working, avoiding the LED display module from being burned or even on fire due to continuous work in the abnormal working state. The working voltage of the LED display module is detected in the embodiment to predict whether the LED display module will be burned, and the on-off of the power supply circuit 30 is controlled based on the detection result, so that the power supply of the LED display module is cut off before the LED display module is burned or on fire. Therefore, the technical scheme of the embodiment can effectively solve the problem that the detection method in the related art cannot predict before the LED display module is burned.

[0033] Taking the LED display module with a rated working voltage of 4.5V as an example, when the LED display module is in an abnormal working state, the actual working voltage thereof will decrease (for example, to below 4.0V), at this time, the LED display module has a high risk of being burned or even on fire. The actual working voltage of the LED display module is detected in the embodiment, when it is detected that the actual working voltage of the LED display module is lower than a preset value (for example, lower than 4.0V), the power supply circuit 30 is controlled to be turned off, thereby avoiding the LED display module from being burned.

[0034] The control panel 10 is also called a receiving card, which can receive and decode video data, process and convert the data after decoding, control the gray scale and color correction of pixel data, and send data to the LED display module, etc. In the embodiment, an existing receiving card is used as the control panel 10, and its idle pins are used as the power supply control terminal 11, the first voltage detection terminal 12 and the selection control terminal 13.

[0035] As shown in FIG. 1, the control panel 10 is connected with the plug-in part 20 through the power supply terminal 21, the first voltage detection terminal 12 and the second voltage detection terminal 22, and the selection control terminal 13 is connected with the plug-in part 20 through the selection control terminal 23. Figure 4As shown, the control assembly is used for controlling a plurality of LED display modules, and the control assembly comprises a plurality of connectors 20, a plurality of power supply circuits 30 and a plurality of voltage detection circuits 40. Each LED display module is connected in conduction with one connector 20, one power supply circuit 30 and one voltage detection circuit 40. The control assembly further comprises a selector 50 connected between the first voltage detection terminal 12 and the plurality of voltage detection circuits 40, so as to control the plurality of voltage detection circuits 40 to be connected in conduction with the first voltage detection terminal 12 in turn. One LED display screen generally comprises a plurality of arrayed LED display modules. The number of the first voltage detection terminals 12 on the control board 10 capable of receiving detection signals is limited, and it is difficult to realize that each LED display module is equipped with one first voltage detection terminal 12. By arranging the selector 50 between the control board 10 and the plurality of voltage detection circuits 40, the selector 50 controls the plurality of voltage detection circuits 40 to be connected in conduction with the first voltage detection terminal 12 in turn, so as to make the actual working voltages of the plurality of LED display modules be transmitted to the control board 10 in turn, and the working voltages of the plurality of LED display modules are detected by using one first voltage detection terminal 12.

[0036] As shown in Figure 1 , Figure 2 and Figure 4 , the control board 10 further has a selection control terminal 13 connected with the selector 50 and transmitting a selection control signal to the selector 50. The selector 50 controls the plurality of voltage detection circuits 40 to transmit detection signals to the control board 10 in turn according to the selection control signal.

[0037] As shown in Figure 4 , the present embodiment takes detecting working voltages of two LED display modules (specifically, a first LED display module and a second LED display module) as an example. Two terminals (a 13th terminal and a 14th terminal) of the selector 50 are connected with two voltage detection circuits 40 respectively. A 3rd terminal of the selector 50 is connected with the first voltage detection terminal 12 (a 185th terminal in Figure 2 ) of the control board 10. An 11th terminal of the selector 50 is connected with the selection control terminal 13 (a 185th terminal in Figure 2 ) of the control board 10. The selector 50 connects the 3rd terminal with the 13th terminal and the 14th terminal in turn, so as to realize alternately transmitting the detection signal of the first LED display module and the detection signal of the second LED display module to the control board 10.

[0038] As shown in Figure 4As shown, the voltage detection circuit 40 comprises a voltage dividing circuit for reducing the voltage value transmitted by the second voltage detection terminal 22 to obtain a detection signal. The actual working voltage of the LED display module is generally above 4V, while the rated working voltage of the control panel 10 is below 4V. If the actual working voltage of the LED display module is directly returned to the control panel 10, the control panel 10 can be damaged. By setting the voltage dividing circuit, the voltage value after voltage reduction is returned to the control panel 10, which can effectively protect the control panel 10.

[0039] As shown in Figure 4 , the first end of the voltage dividing circuit is connected with the second voltage detection terminal 22, and the second end of the voltage dividing circuit is grounded. The voltage dividing circuit comprises a first voltage dividing resistor 41 and a second voltage dividing resistor 42, and the first voltage detection terminal 12 is connected between the first voltage dividing resistor 41 and the second voltage dividing resistor 42. Among them, VP1 is the actual working voltage of the first LED display module (the actual working voltage of the first LED display module is transmitted to the voltage dividing circuit through the 24th terminal in Figure 5 ), VP2 is the actual working voltage of the second LED display module, VVP1 is the voltage value of VP1 after voltage reduction by the voltage dividing circuit, and VVP2 is the voltage value of VP2 after voltage reduction by the voltage dividing circuit. Among them, VVP1 = VP1 x R2 / (R1+R2), R1 is the resistance value of the first voltage dividing resistor 41, and R2 is the resistance value of the second voltage dividing resistor 42; VVP2 = VP2 x R2 / (R1+R2).

[0040] As shown in Figure 3 , the control assembly further comprises an amplifier 60 connected between the power supply control terminal 11 and the power supply circuit 30 to amplify the power supply control signal. Using the amplifier 60 to amplify the power supply control signal makes the power supply switch 31 able to accurately turn on or turn off the power supply circuit 30. Specifically, the two power supply control terminals 11 (the 144th terminal and the 146th terminal in Figure 2 ) of the control panel 10 are respectively connected with the 11th terminal and the 12th terminal of the amplifier 60 to transmit the power supply control signal, and the power supply control signal is transmitted to the two power supply circuits 30 for the two LED display modules through the 8th terminal and the 9th terminal of the amplifier 60 after being amplified by the amplifier 60.

[0041] As shown in Figure 3 , the power supply switch 31 comprises a MOS tube, the source (S) of the MOS tube is connected with the power supply, and the drain (D) of the MOS tube is connected with the power supply terminal 21 (the 23rd terminal in Figure 5The gate of the MOS transistor is connected to the power supply control terminal 11. The MOS transistor has the advantages of low power consumption, high efficiency, fast switching speed, easy control, etc. The power supply control signal transmitted by the power supply control terminal 11 is amplified by the amplifier 60 and then transmitted to the gate of the MOS transistor to control the conduction and turn-off of the MOS transistor. When the LED display module is in a normal working state, the power supply control terminal 11 transmits a low level to the gate of the MOS transistor, and the MOS transistor is turned on to supply power to the LED display module for normal display. When the LED display module is in an abnormal working state, the power supply control terminal 11 transmits a high level to the gate of the MOS transistor, and the MOS transistor is turned off, so that the LED display module is no longer powered to avoid further burning or fire, etc.

[0042] In this embodiment, the MOS transistor is used as the power supply switch 31. In an embodiment not shown in the figure, an electronic relay, a triode, a thyristor, etc. can also be used as the power supply switch.

[0043] As shown in Figure 3 , the power supply circuit 30 further includes a pull-up resistor 32 connected between the gate of the MOS transistor and the power supply. When the front-end device or circuit of the gate of the MOS transistor is damaged (for example, the control panel 10 or the amplifier 60 is damaged), the pull-up resistor 32 applies a bias voltage to the gate of the MOS transistor so that the gate of the MOS transistor is at a high potential, so that the MOS transistor is turned off and the LED display module is powered off, avoiding the situation that the gate of the MOS transistor is floating and the potential is high and low, which causes the MOS transistor to be frequently turned off and turned on, resulting in damage to the MOS transistor or the LED display module.

[0044] As shown in Figure 3 , the power supply circuit 30 further includes a capacitor 33 connected between the source of the MOS transistor and the drain of the MOS transistor. When voltage spikes or surges occur, the capacitor 33 can absorb these peak energies using its energy storage characteristics to reduce voltage fluctuations and protect the MOS transistor.

[0045] The application also provides a control box of an LED display screen. An embodiment of the control box of the LED display screen of the application includes a box body, a power supply arranged in the box body, and a control assembly arranged in the box body, wherein the control assembly is the control assembly described above. The control assembly described above can effectively solve the problem that the detection method in the related art cannot make a prediction before the LED display module is burned out, and the control box with the control assembly described above also has the advantages described above.

[0046] The power supply can supply power to the control assembly and supply power to the LED display module through the power supply circuit 30 of the control assembly.

[0047] The application further provides an LED display screen, and an embodiment of the LED display screen comprises a control assembly and an LED display module, wherein the control assembly is the control assembly described above.

[0048] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0049] In addition, it should be noted that the use of "first", "second" and the like to limit the parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore cannot be understood as a limitation on the protection scope of the present application.

[0050] The above is only a preferred embodiment of the present application and is not intended to limit the present application, and the present application can be variously changed and modified for those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control component for an LED display screen, characterized in that, include: The control board (10) has a power supply control terminal (11) and a first voltage detection terminal (12). The control board (10) can send a power supply control signal to the power supply control terminal (11) according to the detection signal of the first voltage detection terminal (12). A connector (20) is used for plugging and connecting to an LED display module. The connector (20) has a power supply terminal (21) and a second voltage detection terminal (22). A power supply circuit (30) is connected between the power supply control terminal (11) and the power supply terminal (21). A power supply switch (31) is provided in the power supply circuit (30). The power supply switch (31) turns the power supply circuit (30) on or off according to the power supply control signal transmitted by the power supply control terminal (11). A voltage detection circuit (40) is connected between the first voltage detection terminal (12) and the second voltage detection terminal (22) and transmits the detection signal to the first voltage detection terminal (12).

2. The control component for the LED display screen according to claim 1, characterized in that, The control component is used to control multiple LED display modules. The control component includes multiple connectors (20), multiple power supply circuits (30), and multiple voltage detection circuits (40). Each LED display module is connected to a power supply circuit (30) and a voltage detection circuit (40) through a connector (20). The control component also includes a selector (50), which is connected between the first voltage detection terminal (12) and the multiple voltage detection circuits (40) to control the multiple voltage detection circuits (40) to be connected to the first voltage detection terminal (12) in turn.

3. The control component for the LED display screen according to claim 2, characterized in that, The control board (10) also has a selection control terminal (13), which is connected to the selector (50) and transmits a selection control signal to the selector (50).

4. The control component for the LED display screen according to any one of claims 1 to 3, characterized in that, The voltage detection circuit (40) includes a voltage divider circuit, which is used to reduce the voltage value transmitted by the second voltage detection terminal (22) to obtain the detection signal.

5. The control component for the LED display screen according to claim 4, characterized in that, The first end of the voltage divider circuit is connected to the second voltage detection terminal (22), the second end of the voltage divider circuit is grounded, the voltage divider circuit includes a first voltage divider resistor (41) and a second voltage divider resistor (42), and the first voltage detection terminal (12) is connected between the first voltage divider resistor (41) and the second voltage divider resistor (42).

6. The control component for the LED display screen according to any one of claims 1 to 3, characterized in that, The control component also includes an amplifier (60) connected between the power supply control terminal (11) and the power supply circuit (30) to amplify the power supply control signal.

7. The control component for the LED display screen according to any one of claims 1 to 3, characterized in that, The power supply switch (31) includes a MOS transistor, the source of which is connected to the power supply, the drain of which is connected to the power supply terminal (21), and the gate of which is connected to the power supply control terminal (11).

8. The control component for the LED display screen according to claim 7, characterized in that, The power supply circuit (30) further includes a pull-up resistor (32) connected between the gate of the MOS transistor and the power supply; and / or, The power supply circuit (30) also includes a capacitor (33) connected between the source and drain of the MOS transistor.

9. A control box for an LED display screen, comprising a box body, a power supply disposed within the box body, and control components disposed within the box body, characterized in that, The control component is the control component according to any one of claims 1 to 8.

10. An LED display screen, comprising a control component and an LED display module, characterized in that, The control component is the control component according to any one of claims 1 to 8.

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