Power supply redundancy backup circuit and display device

Abstract

The utility model discloses a power supply redundancy backup circuit and a display device, comprising a plurality of main power supplies, a backup power supply and a plurality of power supply conversion assemblies, each power supply conversion assembly comprises a first power supply port, a second power supply port and a power supply output port, the power supply output ports of the power supply conversion assemblies are used for being connected with loads, the first power supply ports are connected with a main power supply in a one-to-one correspondence mode, the second power supply ports are connected with one another and connected with a standby power supply, the power supply conversion assemblies at least comprise a first working state and a second working state, and in the first working state, the first power supply ports are in one-to-one correspondence with the standby power supply. In the first working state, the first power port is connected with the power supply output port, the second power port is disconnected with the power supply output port, in the second working state, the second power port is connected with the power supply output port, and the first power port is disconnected with the power supply output port, so that the cost of setting the standby power supply is effectively reduced; and special conditions such as power supply faults can be timely handled, and the use is convenient and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply equipment, in particular to a power supply redundancy backup circuit and a display device. Background Art

[0002] Existing LED display screens are usually composed of multiple LED display units spliced ​​together to form a size that meets user needs, and each display unit needs to be configured with a corresponding power supply to power it. When a power supply fails, the display unit powered by the power supply stops running, and the corresponding area will be black, and even the corresponding area and the area behind it will be black together. On the display screen of the display device, even a partial black screen will seriously affect the viewing experience and affect the user experience. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a power redundancy backup circuit and a display device, which reduces the cost of setting up a backup power supply, responds to special situations such as power failure in a timely manner, and is convenient and reliable to use.

[0004] According to a first aspect of the utility model, a power supply redundant backup circuit comprises: multiple main power supplies; a backup power supply; multiple power conversion components, each of which comprises a first power port, a second power port and a power output port, the power output port of each power conversion component is used to connect to each load respectively, the first power port is connected to the main power supply one by one, the second power ports are connected to each other and to the backup power supply, the power conversion component comprises at least a first working state and a second working state, in the first working state, the first power port and the power output port are connected, and the second power port and the power output port are disconnected, in the second working state, the second power port and the power output port are connected, and the first power port and the power output port are disconnected.

[0005] A power redundancy backup circuit according to an embodiment of the utility model has at least the following beneficial effects:

[0006] The utility model discloses a power supply redundant backup circuit, wherein each main power supply is configured with a power conversion component, and the main power supply is connected to a first power port. When the main power supply is normal, the first power port and the power supply output terminal are connected, and the main power supply supplies power to the load. When the main power supply fails, the power conversion component is switched to a second working state, and the second power port and the power supply output terminal are connected. At this time, the backup power supply supplies power to the load. The second power ports of multiple power conversion components are all connected to the same backup power supply, which can effectively reduce the cost of setting up a backup power supply, and can promptly respond to special situations such as power failures, and is convenient and reliable to use.

[0007] According to some embodiments of the utility model, the power conversion component includes a control unit, a first switch unit and a second switch unit, the input end of the first switch unit is connected to the first power port, the output end of the first switch unit is connected to the power supply output port, the input end of the second switch unit is connected to the second power port, the output end of the second switch unit is connected to the power supply output port, and the control unit is respectively connected to the controlled end of the first switch unit and the controlled end of the second switch unit.

[0008] According to some embodiments of the present utility model, the power conversion component also includes a first power supply detection unit, a sampling end of the first power supply detection unit is connected to the first power port, and an output end of the first power supply detection unit is connected to a control unit.

[0009] According to some embodiments of the present invention, the first power supply detection unit includes a resistor R1 and a resistor R2, one end of the resistor R1 is connected to the first power port, the other end of the resistor R1 is respectively connected to one end of the resistor R2 and the control unit, and the other end of the resistor R2 is grounded.

[0010] According to some embodiments of the present utility model, the power conversion component also includes a second power supply detection unit, a sampling end of the second power supply detection unit is connected to the second power port, and an output end of the second power supply detection unit is connected to the control unit.

[0011] According to some embodiments of the utility model, the power conversion component also includes a boost unit, an input end of the boost unit is respectively connected to the first power port and the second power port, and an output end of the boost unit is respectively powered by the first switch unit and the second switch unit.

[0012] According to some embodiments of the present utility model, the first switch unit includes a first semiconductor switch tube Q1, a second semiconductor switch tube Q2, a resistor R7 and a resistor R9, the second switch unit includes a third semiconductor switch tube Q3, a fourth semiconductor switch tube Q4, a resistor R8 and a resistor R10, the input end of the second switch tube Q2 is connected to the first power supply port, the controlled end of the second switch tube Q2 is connected to one end of the resistor R9, the other end of the resistor R9 is respectively connected to one end of the resistor R7 and the input end of the first switch tube Q1, the output end of the boost unit is respectively connected to the other end of the resistor R7 and and one end of the resistor R8, the other end of the resistor R8 is respectively connected to one end of the resistor R10 and the input end of the third switch tube Q3, the other end of the resistor R10 is connected to the controlled end of the fourth switch tube Q4, the input end of the fourth switch tube Q4 is connected to the second power supply port, the output end of the fourth switch tube Q4 and the output end of the second switch tube Q2 are both connected to the power supply output port, the output end of the first switch tube Q1 and the output end of the third switch tube Q3 are both grounded, and the control unit is respectively connected to the controlled end of the first switch tube Q1 and the controlled end of the third switch tube Q3.

[0013] According to some embodiments of the present utility model, the power conversion component further includes an output voltage detection unit, a sampling end of the output voltage detection unit is connected to the power supply output port, and an output end of the output voltage detection unit is connected to the control unit.

[0014] According to some embodiments of the present invention, the power supply redundancy backup circuit further includes a main control module, and the main control module is respectively connected to each of the control units.

[0015] According to the display device of the second aspect of the present invention, the display device includes a plurality of display units and the power supply redundancy backup circuit disclosed in any one of the above embodiments, and the power supply output ports are connected to the display units in a one-to-one correspondence.

[0016] The display device according to the embodiment of the utility model has at least the following beneficial effects:

[0017] The display device of the utility model uses the power redundancy backup circuit disclosed in any of the above embodiments to power the display unit, which effectively reduces the cost of setting up a backup power supply and can respond to special situations such as power failure in a timely manner. It is convenient and reliable to use.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a principle structure block diagram of one embodiment of the power supply redundancy backup circuit of the utility model;

[0021] Figure 2 A circuit diagram of one embodiment of the power supply redundancy backup circuit of the utility model;

[0022] Figure 3 This is a principle structure block diagram of one embodiment of the display device of the present utility model.

[0023] Reference numerals:

[0024] Main power supply 100; backup power supply 200; power conversion component 300; first switch unit 310; second switch unit 320; first power port 330; second power port 340; power output port 350; first power supply detection unit 360; second power supply detection unit 370; output voltage detection unit 380; boost unit 390; control unit 400; main control module 500; display unit 600. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 , 2 As shown, according to a first aspect of an embodiment of the utility model, a power supply redundancy backup circuit includes multiple main power supplies 100, a backup power supply 200 and multiple power conversion components 300, each of the power conversion components 300 includes a first power port 330, a second power port 340 and a power output port 350, the power output port 350 of each power conversion component 300 is used to connect to each load respectively, the first power port 330 is connected to the main power supply 100 one by one, and each second power port 340 is connected to each other and to the backup power supply 200, the power conversion component 300 includes at least a first working state and a second working state, in the first working state, the first power port 330 and the power output port 350 are connected, and the second power port 340 and the power output port 350 are disconnected, in the second working state, the second power port 340 and the power output port 350 are connected, and the first power port 330 and the power output port 350 are disconnected.

[0030] Among them, the main power supply 100 and the backup power supply 200 can be selected from conventional switching power supplies or batteries, the power conversion component 300 can include a circuit board, the components and circuits of the power conversion component 300 can be arranged on the circuit board, the first power port 330, the second power port 340 and the power output port 350 can all be electrical connection plug-in ports or electrical connection lap ports on the circuit board, the main power supply 100 can be connected to the first power port 330 through a conductive sheet or a wire, and then locked and connected by screws, the backup power supply 200 can be connected to the second power port 340 of any power conversion component 300 through a conductive sheet or a wire, and then locked and connected by screws, and the second power ports 340 of adjacent power conversion components 300 can be connected to each other through wires or conductive sheets.

[0031] In the power supply redundant backup circuit of the utility model, each main power supply 100 is configured with a power conversion component 300, and the main power supply 100 is connected to the first power port 330. When the main power supply 100 is normal, the first power port 330 and the power supply output end are connected, and the main power supply 100 supplies power to the load. When the main power supply 100 fails, the power conversion component 300 switches to the second working state, and the second power port 340 and the power supply output end are connected. At this time, the backup power supply 200 supplies power to the load, and the second power ports 340 of multiple power conversion components 300 are all connected to the same backup power supply 200, which can effectively reduce the cost of setting up the backup power supply 200, and can respond to special situations such as power failures in a timely manner, and is convenient and reliable to use.

[0032] In some embodiments of the present invention, Figure 1 , Figure 2 As shown, the power conversion component 300 includes a control unit 400, a first switch unit 310 and a second switch unit 320, the input end of the first switch unit 310 is connected to the first power port 330, the output end of the first switch unit 310 is connected to the power output port 350, the input end of the second switch unit 320 is connected to the second power port 340, the output end of the second switch unit 320 is connected to the power output port 350, and the control unit 400 is respectively connected to the controlled end of the first switch unit 310 and the controlled end of the second switch unit 320.

[0033] The control unit 400 can be selected from a processing chip such as an MCU or a CPU and its associated circuits. The control unit 400 can control the on and off of the first switch unit 310 and the second switch unit 320 respectively, thereby controlling the power conversion component 300 to switch between the first working state and the second working state.

[0034] In some embodiments of the present invention, the power conversion component 300 also includes a first power supply detection unit 360, a sampling end of the first power supply detection unit 360 is connected to the first power port 330, and an output end of the first power supply detection unit 360 is connected to the control unit 400.

[0035] The first power supply detection unit 360 is used to detect the power supply condition of the main power supply 100. When the main power supply 100 fails, the power supply voltage is abnormal. The control unit 400 can judge based on the voltage signal fed back by the first power supply detection unit 360. When the main power supply 100 fails, the first switch unit 310 is promptly controlled to be disconnected and the second switch unit 320 is controlled to be closed, and the backup power supply 200 is used for power supply.

[0036] Specifically, the first power supply detection unit 360 includes a resistor R1 and a resistor R2, one end of the resistor R1 is connected to the first power port 330, the other end of the resistor R1 is respectively connected to one end of the resistor R2 and the control unit 400, and the other end of the resistor R2 is grounded.

[0037] Resistors R1 and R2 form a voltage divider detection circuit. One end of resistor R1 is used to sample the supply voltage of the main power supply 100, and then the supply voltage is reduced through resistor voltage division to form a first voltage feedback signal. The control unit 400 can obtain the power supply status of the main power supply 100 based on the first voltage feedback signal.

[0038] In some embodiments of the present invention, the power conversion component 300 also includes a second power supply detection unit 370, a sampling end of the second power supply detection unit 370 is connected to the second power port 340, and an output end of the second power supply detection unit 370 is connected to the control unit 400.

[0039] The second power supply detection unit 370 is used to detect the power supply status of the backup power supply 200. When the main power supply 100 fails, the backup power supply 200 supplies power. The control unit 400 determines the fault based on the voltage signal fed back by the second power supply detection unit 370, and promptly feeds back to the staff to remind them to perform maintenance.

[0040] Specifically, the second power supply detection unit 370 may also adopt a voltage division detection circuit, and the voltage division detection circuit is composed of a resistor R3 and a resistor R4.

[0041] In some embodiments of the present invention, the power conversion component 300 also includes an output voltage detection unit 380 , a sampling end of the output voltage detection unit 380 is connected to the power output port 350 , and an output end of the output voltage detection unit 380 is connected to the control unit 400 .

[0042] The output voltage detection unit 380 can detect the output voltage for powering the load. When the output voltage cannot meet the power demand of the load, the control unit 400 can learn from the voltage signal fed back by the output voltage detection unit 380 and promptly notify the staff for maintenance.

[0043] Specifically, the output voltage detection unit 380 may also use a voltage divider detection circuit, the voltage divider detection circuit is composed of a resistor R11 and a resistor R12.

[0044] In some embodiments of the present invention, the power supply redundancy backup circuit further includes a main control module 500 , and the main control module 500 is connected to each of the control units 400 .

[0045] The main control module 500 may be a central processing unit connected to each control unit 400, and may be specifically selected from an MCU or a CPU and its associated circuits, and may be configured with a display screen, a sound alarm, etc. to promptly alert staff members in the event of a fault.

[0046] In some embodiments of the present invention, the power conversion component 300 also includes a boost unit 390, the input end of the boost unit 390 is respectively connected to the first power port 330 and the second power port 340, and the output end of the boost unit 390 is respectively powered by the first switch unit 310 and the second switch unit 320.

[0047] Regardless of whether it is connected to the main power supply 100 or the backup power supply 200, the boost unit 390 can boost the power supply voltage and then provide it to the first switch unit 310 or the second switch unit 320, thereby meeting the driving voltage requirements of the first switch unit 310 or the second switch unit 320 and improving the response rate of the first switch unit 310 or the second switch unit 320 when it is turned on and off.

[0048] In some embodiments of the present invention, Figure 2 As shown, the first switch unit 310 includes a first semiconductor switch tube Q1, a second semiconductor switch tube Q2, a resistor R7 and a resistor R9, the second switch unit 320 includes a third semiconductor switch tube Q3, a fourth semiconductor switch tube Q4, a resistor R8 and a resistor R10, the input end of the second switch tube Q2 is connected to the first power port 330, the controlled end of the second switch tube Q2 is connected to one end of the resistor R9, the other end of the resistor R9 is respectively connected to one end of the resistor R7 and the input end of the first switch tube Q1, the output end of the boost unit 390 is respectively connected to the other end of the resistor R7 and the input end of the resistor R10 One end of the resistor R8 is connected, the other end of the resistor R8 is respectively connected to one end of the resistor R10 and the input end of the third switch tube Q3, the other end of the resistor R10 is connected to the controlled end of the fourth switch tube Q4, the input end of the fourth switch tube Q4 is connected to the second power port 340, the output end of the fourth switch tube Q4 and the output end of the second switch tube Q2 are both connected to the power supply output port 350, the output end of the first switch tube Q1 and the output end of the third switch tube Q3 are both grounded, and the control unit 400 is respectively connected to the controlled end of the first switch tube Q1 and the controlled end of the third switch tube Q3.

[0049] Specifically, the first switch tube Q1 and the third switch tube Q3 can be triodes, and the second switch tube Q2 and the fourth switch tube Q4 can be semiconductor thyristor devices such as MOS tubes or IGBTs. After the boosting effect of the boost unit 390, and in conjunction with the first switch tube Q1 or the third switch tube Q3, the driving force of the second switch tube Q2 and the fourth switch tube Q4 can be respectively increased.

[0050] According to the display device of the second embodiment of the utility model, Figure 3 As shown, it includes a plurality of display units 600 and a power supply redundancy backup circuit disclosed in any of the above embodiments, and the power supply output ports 350 are connected to the display units 600 in a one-to-one correspondence.

[0051] The display unit 600 may be an LED unit screen, and a plurality of display units 600 may be spliced ​​together to form a whole display screen, and each display unit 600 is configured with a main power supply 100 and a power conversion component 300 to provide power in a one-to-one manner.

[0052] The display device of the present utility model uses the power redundancy backup circuit disclosed in any of the above embodiments to power the display unit 600, which effectively reduces the cost of setting up the backup power supply 200 and can respond to special situations such as power failure in a timely manner. It is convenient and reliable to use.

[0053] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power supply redundant backup circuit, characterized in that: include: Multiple main power supplies; Backup power supply; A plurality of power conversion components, each of which includes a first power port, a second power port and a power supply output port, the power supply output port of each power conversion component is used to connect to each load respectively, the first power port is connected to the main power supply one by one, the second power ports are connected to each other and to the backup power supply, the power conversion component includes at least a first working state and a second working state, in the first working state, the first power port and the power supply output port are connected, and the second power port and the power supply output port are disconnected, in the second working state, the second power port and the power supply output port are connected, and the first power port and the power supply output port are disconnected.

2. A power supply redundancy backup circuit according to claim 1, characterized in that: The power conversion component includes a control unit, a first switch unit and a second switch unit, the input end of the first switch unit is connected to the first power port, the output end of the first switch unit is connected to the power output port, the input end of the second switch unit is connected to the second power port, the output end of the second switch unit is connected to the power output port, and the control unit is respectively connected to the controlled end of the first switch unit and the controlled end of the second switch unit.

3. A power supply redundant backup circuit according to claim 2, characterized in that: The power conversion component further includes a first power supply detection unit, a sampling end of the first power supply detection unit is connected to the first power port, and an output end of the first power supply detection unit is connected to the control unit.

4. A power supply redundant backup circuit according to claim 3, characterized in that: The first power supply detection unit includes a resistor R1 and a resistor R2, one end of the resistor R1 is connected to the first power port, the other end of the resistor R1 is respectively connected to one end of the resistor R2 and the control unit, and the other end of the resistor R2 is grounded.

5. The power supply redundant backup circuit according to claim 3, characterized in that: The power conversion component further includes a second power supply detection unit, a sampling end of the second power supply detection unit is connected to the second power port, and an output end of the second power supply detection unit is connected to the control unit.

6. The power supply redundancy backup circuit according to claim 2, characterized in that: The power conversion component also includes a boost unit, an input end of the boost unit is respectively connected to the first power port and the second power port, and an output end of the boost unit is respectively powered by the first switch unit and the second switch unit.

7. A power supply redundancy backup circuit according to claim 6, characterized in that: The first switch unit includes a first semiconductor switch tube Q1, a second semiconductor switch tube Q2, a resistor R7 and a resistor R9; the second switch unit includes a third semiconductor switch tube Q3, a fourth semiconductor switch tube Q4, a resistor R8 and a resistor R10; the input end of the second switch tube Q2 is connected to the first power supply port; the controlled end of the second switch tube Q2 is connected to one end of the resistor R9; the other end of the resistor R9 is respectively connected to one end of the resistor R7 and the input end of the first switch tube Q1; the output end of the boost unit is respectively connected to the other end of the resistor R7 and the resistor R8 one end of the resistor R8 is connected to one end of the resistor R10 and the input end of the third switch tube Q3 respectively, the other end of the resistor R10 is connected to the controlled end of the fourth switch tube Q4, the input end of the fourth switch tube Q4 is connected to the second power supply port, the output end of the fourth switch tube Q4 and the output end of the second switch tube Q2 are both connected to the power supply output port, the output end of the first switch tube Q1 and the output end of the third switch tube Q3 are both grounded, and the control unit is respectively connected to the controlled end of the first switch tube Q1 and the controlled end of the third switch tube Q3.

8. The power supply redundant backup circuit according to claim 2, characterized in that: The power conversion component further includes an output voltage detection unit, a sampling end of the output voltage detection unit is connected to the power supply output port, and an output end of the output voltage detection unit is connected to the control unit.

9. A power supply redundancy backup circuit according to claim 2, characterized in that: It also includes a main control module, which is connected to each of the control units respectively.

10. A display device, characterized in that: It comprises a plurality of display units and a power supply redundant backup circuit as described in any one of claims 1 to 9, wherein the power supply output ports are connected to the display units in a one-to-one correspondence.

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