CN214756067U - Novel LED display screen power supply system - Google Patents
Novel LED display screen power supply system Download PDFInfo
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- CN214756067U CN214756067U CN202120232448.1U CN202120232448U CN214756067U CN 214756067 U CN214756067 U CN 214756067U CN 202120232448 U CN202120232448 U CN 202120232448U CN 214756067 U CN214756067 U CN 214756067U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model provides a novel LED display screen power supply system, including power input end, AC-to-DC voltage boost module, PFC voltage stabilizing module, direct current conversion decompression module and power output end, power input end is connected with AC-to-DC voltage boost module, and PFC voltage stabilizing module connects between AC-to-DC voltage boost module and direct current conversion decompression module, and power output end and direct current conversion decompression module are connected, be connected with fourth electric capacity C4 and current transformer CT between AC-to-DC voltage boost module and the direct current conversion decompression module, it has third electric capacity C3 to connect in parallel between AC-to-DC voltage boost module and the direct current conversion decompression module. A novel LED display screen power supply system, a novel LED display screen power supply system, realized the transmission of voltage at conversion in-process crowning stability, high conversion rate, promoted the utilization efficiency of whole screen electric energy, improved product competitiveness, constantly satisfied the high-end display demand of modern LED display screen.
Description
Technical Field
The utility model belongs to the LED power supply field especially relates to a novel LED display screen power supply system.
Background
At present, the conventional display screen generally adopts an AC220V power supply mode, and the switching power supply converts the output DC5V to supply power to the display module, so as to realize the overall power supply of the LED display screen. The LED display screen with the small installation space is difficult to construct and install, the display area of the current LED display screen is gradually enlarged, if the LED display screen is still in an original power supply mode, more switching power supplies are required to be arranged on the larger display screen and placed behind the display screen, then the existing switching power supplies can only convert electric energy of about 85%, partial electric energy can be lost, the required energy consumption is greatly increased due to the increase of the number of the switching power supplies, the whole heat dissipation performance of the display screen is weakened, the LED display screen is more prone to heat generation, a large number of power supplies and wire rods are required to be arranged simultaneously, the installation and later maintenance difficulty is increased, the high-voltage power supplies and the low-voltage power lines are interwoven and stacked behind the display screen, and potential safety hazards are easily caused to the display screen and later maintenance.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a novel power supply system for LED display screen to solve the above-mentioned disadvantages.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a novel power supply system for an LED display screen comprises a power supply input end, an alternating current-direct current boosting module, a PFC voltage stabilizing module, a direct current conversion voltage reducing module and a power supply output end;
the input end of the power supply is connected with the alternating current-direct current boosting module, the PFC voltage stabilizing module is connected between the alternating current-direct current boosting module and the direct current conversion pressure reducing module, and the output end of the power supply is connected with the direct current conversion pressure reducing module;
a fourth capacitor C4 and a current transformer are connected between the AC-DC boosting module and the DC conversion pressure-reducing module, and a third capacitor C3 is connected between the AC-DC boosting module and the DC conversion pressure-reducing module in parallel.
Furthermore, the power input end is connected in parallel with a heating element and a cooling fan.
Further, the power output end comprises VCC, GND, a variable resistor RT and an eighth resistor R8;
the VCC is connected with eighth resistance R8, and the other end of eighth resistance R8 is connected with variable resistance RT, and the other end of variable resistance RT is connected with GND.
Furthermore, the alternating current-to-direct current boosting module comprises a bridge rectifier circuit and an operational amplifier;
the operational amplifier comprises a first operational amplifier and a second operational amplifier;
two input ends of the bridge rectifier circuit are connected with a power supply input end, and two output ends of the bridge rectifier circuit are a first output end and a second output end;
the first output end is connected with the adjustable resistor R1, the other end of the R1 is connected with the anode of the first operational amplifier, the first output end is further connected with a first capacitor C1, the other end of the first capacitor C1 is connected with a second resistor, and the other end of the second resistor is connected with the cathode of the operational amplifier and is connected with the cathode of the first operational amplifier;
the second output end is connected with an adjustable resistor R3, the other end of the adjustable resistor R3 is connected with the anode of the second operational amplifier, the second output end is further connected with a second capacitor C2, the other end of the second capacitor C2 is connected with a fourth resistor, and the other end of the fourth resistor is connected with the cathode of the operational amplifier and is connected with the cathode of the second operational amplifier.
Further, the direct current conversion voltage reduction module comprises a transformer, a first light emitting diode LED1, a first direct current contactor KM1, a second light emitting diode LED2, a second direct current contactor KM2, a fifth resistor R5, a sixth resistor R6, an adjustable resistor R7, a first inductor L1, a second inductor L2, a sixth capacitor C6 and a seventh capacitor C7;
the transformer comprises an input end and an output end;
the input end comprises a first input end and a second input end;
the first input end is connected with the fourth capacitor C4, and the second input end is connected with the current transformer CT;
the output end comprises a first output end and a second output end;
the first output end is connected with a first light-emitting diode LED1 and a first direct current contactor KM1 in parallel;
the other ends of the first light-emitting diode LED1 and the first direct current contactor KM1 are connected with a first inductor L1, the other end of the first inductor L1 is connected with a second inductor L2, and the other end of the second inductor L2 is connected with VCC;
the second output end is connected with a second light-emitting diode LED2 and a second direct current contactor KM2 in parallel;
the other ends of the second light emitting diode LED2 and the second direct current contactor KM2 are connected with a sixth resistor R6, and the other end of the sixth resistor R6 is connected with GND.
Compared with the prior art, a novel LED display screen power supply system have following advantage:
(1) a novel LED display screen power supply system, realized the transmission of voltage at conversion in-process crowning stability, high conversion rate, promoted the utilization efficiency of whole screen electric energy, improved product competitiveness, constantly satisfied the high-end display demand of modern LED display screen.
(2) A novel LED display screen power supply system, arrange the power supply in whole screen below, owing to accomplish high pressure to the voltage conversion of low pressure in switching power supply, so only need be equipped with the low voltage power cord and be connected to display module and carry out the power supply, alright carry out the electric quantity supply of whole screen and supply with. The operation safety when having guaranteed power supply safety and later maintenance has reduced the construction degree of difficulty and the cost of LED display screen power supply.
(3) A novel LED display screen power supply system, be equipped with AC current change direct current pressure boost module, PFC voltage stabilizing module, direct current conversion decompression module in the power supply ware, make the power supply ware be different from switching power supply before, inner structure is more integrated, makes the ripple value of output voltage, electric current reduce and approaches to zero, can high stable carry out voltage conversion and transmission, improves whole power supply system's response speed, reaches the effect of practicing thrift the energy consumption simultaneously.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic view of a power supply system for a display screen according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power supply according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a power supply circuit of a display screen according to an embodiment of the present invention.
Description of reference numerals:
1-an alternating current to direct current boosting module; 2-PFC voltage-stabilizing module; 3-direct current conversion decompression module; 4-bridge rectifier circuit; 5-an operational amplifier; 6-LED display screen.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 3, the power supply circuit includes a power input terminal, an ac-to-dc boosting module 1, a PFC regulator module 2, a dc-to-dc conversion voltage reduction module 3, and a power output terminal;
the power supply input end is connected with the alternating current-direct current boosting module, and the power supply output end is connected with the direct current conversion decompression module;
a fourth capacitor C4 and a current transformer CT are connected between the AC-DC voltage boosting module and the DC conversion voltage reducing module, and a third capacitor C3 is connected between the AC-DC voltage boosting module and the DC conversion voltage reducing module in parallel.
As shown in fig. 1 to 3, the power input terminal is connected in parallel with a heating element and a fan.
As shown in fig. 1 to 3, the power output terminal includes VCC, GND, a variable resistor RT, and an eighth resistor R8;
the VCC is connected with eighth resistance R8, and the other end of eighth resistance R8 is connected with variable resistance RT, and the other end of variable resistance RT is connected with GND.
The alternating current-to-direct current boosting module comprises a bridge rectifier circuit 4 and an operational amplifier 5;
the operational amplifier comprises a first operational amplifier and a second operational amplifier;
two input ends of the bridge rectifier circuit are connected with a power supply input end, and two output ends of the bridge rectifier circuit are a first output end and a second output end;
the first output end is connected with the adjustable resistor R1, the other end of the R1 is connected with the anode of the first operational amplifier, the first output end is further connected with a first capacitor C1, the other end of the first capacitor C1 is connected with a second resistor, and the other end of the second resistor is connected with the cathode of the operational amplifier and is connected with the cathode of the first operational amplifier;
the second output end is connected with an adjustable resistor R3, the other end of the adjustable resistor R3 is connected with the anode of the second operational amplifier, the second output end is further connected with a second capacitor C2, the other end of the second capacitor C2 is connected with a fourth resistor, and the other end of the fourth resistor is connected with the cathode of the operational amplifier and is connected with the cathode of the second operational amplifier.
The direct current conversion voltage reduction module comprises a transformer, a first Light Emitting Diode (LED) 1, a first direct current contactor KM1, a second LED2, a second direct current contactor KM2, a fifth resistor R5, a sixth resistor R6, an adjustable resistor R7, a first inductor L1, a second inductor L2, a sixth capacitor C6 and a seventh capacitor C7;
the transformer comprises an input end and an output end;
the input end comprises a first input end and a second input end;
the first input end is connected with the fourth capacitor C4, and the second input end is connected with the current transformer CT;
the output end comprises a first output end and a second output end;
the first output end is connected with a first light-emitting diode LED1 and a first direct current contactor KM1 in parallel;
the other ends of the first light-emitting diode LED1 and the first direct current contactor KM1 are connected with a first inductor L1, the other end of the first inductor L1 is connected with a second inductor L2, and the other end of the second inductor L2 is connected with VCC;
the second output end is connected with a second light-emitting diode LED2 and a second direct current contactor KM2 in parallel;
the other ends of the second light emitting diode LED2 and the second direct current contactor KM2 are connected with a sixth resistor R6, and the other end of the sixth resistor R6 is connected with GND.
The detailed technical scheme is as follows:
the utility model provides a novel LED display screen power supply system scheme, this system scheme can provide the function of concentrating the power supply for LED display screen 6. The system mainly comprises an AC220V (220V alternating current) input current, a power supply, a DC5V (5V direct current) output current, a display module and a power supply wire; the power supply comprises an AC220V and DC5V terminal, an AC-DC boosting module, a PFC module and a DC converting and voltage reducing module.
The specific process of the system for supplying power to the display screen comprises the following steps: the AC220V is provided by a distribution box or other external high-voltage power supply equipment, the AC220V is connected into a power supply inside the display screen through a cable, the AC220V high voltage is converted into DC400 high voltage through an AC-DC boosting module, the DC400 high voltage is output through a PFC module, the stability of voltage transmission is ensured, the DC400V high voltage output by two ends of the PFC module is received by a DC conversion voltage-reducing module, then voltage-reducing processing is carried out, the DC400V high voltage is converted into DC5V voltage to be output, and then the DC5V low-voltage power supply interface is connected to the display module through a 5V power line, so that the power supply for the whole display screen is completed.
The PFC module refers to a power factor correction module, and the power factor refers to a relationship between the effective power and the total power consumption, that is, a ratio of the effective power divided by the total power consumption. The system adopts active PFC, the power factor can reach 0.98, the energy loss rate is low, a high-integration IC chip is adopted, the input voltage range is wide and can be from 90V to 270V, and high-stability output can be obtained and transmitted to the direct-current conversion voltage reduction module for voltage conversion. By improving the power factor, the total current in the line and the capacities of electrical elements in a power supply system, such as a transformer, electrical equipment, a lead and the like, are reduced, so that not only is the investment cost reduced, but also the loss of the electric energy per se is reduced. The good power factor value can reduce the voltage loss in the power supply system, can make the load voltage more stable, and improves the quality of the electric energy.
The alternating current-to-direct current boosting module can enable a circuit to form constant current, can receive power supplied by alternating current commercial power and realizes conversion between alternating current and direct current. The alternating current-to-direct current boosting module can receive voltage input between AC85V V and 265V, the precision error of output voltage does not exceed +/-1%, and a power supply with the alternating current-to-direct current boosting module can simultaneously have circuit protection measures such as short-circuit protection, overvoltage protection, undervoltage protection, overcurrent protection and the like, so that the display module can be effectively prevented from being damaged even if an electrical accident occurs.
The direct current conversion voltage reduction module specifically converts high-voltage direct current into low-voltage direct current through the self-oscillation circuit and the voltage doubling rectifying circuit for output, and compared with other voltage reduction and stabilization modules, the voltage reduction process avoids consumption of electric energy on the voltage reduction module to the greatest extent, so that the output energy of the voltage reduction module is constant. Meanwhile, the oscillator and the chopping module are arranged in the direct current conversion voltage reduction module, and the output voltage in a certain range can be ensured to be the same value. The voltage is stably converted and transmitted, the precision can reach +/-3%, the performance of quick response is realized, and the effect of saving electric energy is achieved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a novel LED display screen power supply system which characterized in that: the device comprises a power supply input end, an alternating current-to-direct current boosting module (1), a PFC voltage stabilizing module (2), a direct current conversion decompression module (3) and a power supply output end;
the input end of the power supply is connected with the alternating current-direct current boosting module, the PFC voltage stabilizing module (2) is connected between the alternating current-direct current boosting module (1) and the direct current conversion pressure reducing module (3), and the output end of the power supply is connected with the direct current conversion pressure reducing module;
a fourth capacitor C4 and a current transformer CT are connected between the AC-DC conversion pressurizing module (1) and the DC conversion decompressing module (3), and a third capacitor C3 is connected between the AC-DC conversion pressurizing module and the DC conversion decompressing module in parallel.
2. The novel power supply system for the LED display screen according to claim 1, wherein: the power input end is connected with a heating element and a heat radiation fan in parallel.
3. The novel power supply system for the LED display screen according to claim 1, wherein: the power supply output end comprises VCC, GND, a variable resistor RT and an eighth resistor R8;
the VCC is connected with eighth resistance R8, and the other end of eighth resistance R8 is connected with variable resistance RT, and the other end of variable resistance RT is connected with GND.
4. The novel power supply system for the LED display screen according to claim 1, wherein: the alternating current-to-direct current boosting module (1) comprises a bridge rectifier circuit (4) and an operational amplifier (5);
the operational amplifier (5) comprises a first operational amplifier and a second operational amplifier;
two input ends of the bridge rectifier circuit (4) are connected with a power supply input end, and two output ends of the bridge rectifier circuit (4) are a first output end and a second output end;
the first output end is connected with the adjustable resistor R1, the other end of the R1 is connected with the anode of the first operational amplifier, the first output end is further connected with a first capacitor C1, the other end of the first capacitor C1 is connected with a second resistor, and the other end of the second resistor is connected with the cathode of the operational amplifier and is connected with the cathode of the first operational amplifier;
the second output end is connected with an adjustable resistor R3, the other end of the adjustable resistor R3 is connected with the anode of the second operational amplifier, the second output end is further connected with a second capacitor C2, the other end of the second capacitor C2 is connected with a fourth resistor, and the other end of the fourth resistor is connected with the cathode of the operational amplifier and is connected with the cathode of the second operational amplifier.
5. The novel power supply system for the LED display screen according to claim 1, wherein: the direct current conversion voltage reduction module (3) comprises a transformer, a first light emitting diode LED1, a first direct current contactor KM1, a second light emitting diode LED2, a second direct current contactor KM2, a fifth resistor R5, a sixth resistor R6, an adjustable resistor R7, a first inductor L1, a second inductor L2, a sixth capacitor C6 and a seventh capacitor C7;
the transformer comprises an input end and an output end;
the input end comprises a first input end and a second input end;
the first input end is connected with the fourth capacitor C4, and the second input end is connected with the current transformer CT;
the output end comprises a first output end and a second output end;
the first output end is connected with a first light-emitting diode LED1 and a first direct current contactor KM1 in parallel;
the other ends of the first light-emitting diode LED1 and the first direct current contactor KM1 are connected with a first inductor L1, the other end of the first inductor L1 is connected with a second inductor L2, and the other end of the second inductor L2 is connected with VCC;
the second output end is connected with a second light-emitting diode LED2 and a second direct current contactor KM2 in parallel;
the other ends of the second light emitting diode LED2 and the second direct current contactor KM2 are connected with a sixth resistor R6, and the other end of the sixth resistor R6 is connected with GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232448.1U CN214756067U (en) | 2021-01-25 | 2021-01-25 | Novel LED display screen power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120232448.1U CN214756067U (en) | 2021-01-25 | 2021-01-25 | Novel LED display screen power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214756067U true CN214756067U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120232448.1U Active CN214756067U (en) | 2021-01-25 | 2021-01-25 | Novel LED display screen power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214756067U (en) |
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2021
- 2021-01-25 CN CN202120232448.1U patent/CN214756067U/en active Active
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