CN102054429A - Power supply topology system of LED (Light-Emitting Diode) display module - Google Patents
Power supply topology system of LED (Light-Emitting Diode) display module Download PDFInfo
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- CN102054429A CN102054429A CN200910309175XA CN200910309175A CN102054429A CN 102054429 A CN102054429 A CN 102054429A CN 200910309175X A CN200910309175X A CN 200910309175XA CN 200910309175 A CN200910309175 A CN 200910309175A CN 102054429 A CN102054429 A CN 102054429A
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Abstract
The invention provides a power supply topology system of an LED (Light-Emitting Diode) display module, comprising an AC (Alternating Current) power supply input interface, an AC power supply filtering and PFC (Power Factor Correction) module, a module auxiliary power supply module, a DC (Direct Current) bus, a plurality of main power supply conversion loop modules and a plurality of LED dot matrix display modules; the AC power supply input interface is connected with the AC power supply filtering and PFC module; the AC power supply filtering and PFC module is connected with the module auxiliary power supply module and the DC bus; the DC bus is connected to the module auxiliary power supply module and the main power supply conversion loop modules; and the main power supply conversion loop modules are connected with the LED dot matrix display modules.
Description
Technical field
The present invention relates to a kind of power domain, particularly a kind of LED shows module power supply topological system.
Background technology
Available technology adopting common power driving LED display screen, LED need low-voltage direct to drive, and the relatively-stationary output setting range that exists the driving power module to export 5V+1%, this power supply can not satisfy the best setting after the LED conducting; Too many useless power consumption is wasted in the low-voltage of power supply transmission in addition, has increased the heat temperature of module; Consume at various conveying processes in order to reduce low voltage direct current, the a large amount of small-power switching power-supply modules of the general employing of display screen distribution, be configured to distributed local depression direct current supply pattern, this realization is visited method when having solved the low pressure loss, has but brought problems such as harmonic pollution.
Summary of the invention
The present invention is in order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind ofly can reduce the low pressure unwanted losses, and the LED that harmonic carcellation pollutes shows module power supply topological system.
The technical solution adopted for the present invention to solve the technical problems is: a kind of LED shows module power supply topological system, it comprises the AC power input interface, AC power filtering and PFC module, module accessory power supply module, dc bus, a plurality of primary power transformation loop modules and a plurality of LED dot matrix display module, described AC power input interface links to each other with the PFC module with AC power filtering, described AC power filtering is connected with module accessory power supply module and dc bus with the PFC module, described dc bus is connected to module accessory power supply module and primary power transformation loop module, and described primary power transformation loop module is connected with this LED dot matrix display module.
The scheme that the present invention solves further technical matters is: the alternating current of described AC power input interface input 220V/50HZ or 110V/60HZ.
The scheme that the present invention solves further technical matters is: described AC power filtering and PFC module comprise that filter rectifier and PFC adjust circuit, and described filter rectifier is to play the barrier buffer action to what power-supply system was electrically connected with the city.
The scheme that the present invention solves further technical matters is: described PFC adjusts circuit by detecting harmonic wave, produces the antipole harmonic current, and the harmonic wave of reversed polarity is injected in the electrical network.
The scheme that the present invention solves further technical matters is: described module accessory power supply module is the Switching Power Supply of a power less than the miniaturization of 30W.
The scheme that the present invention solves further technical matters is: described primary power transformation loop module comprises that the power supply main transformer changes circuit and output voltage is adjusted the loop.
The scheme that the present invention solves further technical matters is: described power supply main transformer changes the output voltage that outputs signal to of circuit and adjusts the loop.
The scheme that the present invention solves further technical matters is: output voltage is adjusted the loop and is comprised 3 road BUCK circuit, and carrying out PWM, to adjust output control voltage V red, the green and V indigo plant of V.
The scheme that the present invention solves further technical matters is: described LED dot matrix display module comprises by a plurality of LED, according to the designing requirement of pixel, and the lattice module that becomes the matrix pixel region point to arrange.
Compared to prior art, LED of the present invention shows that the beneficial effect of module power supply topological system is: by AC power filtering and PFC module, follow-up a plurality of DC-DC translation circuits and electrical network are separated, and carried out the PFC active correction, thereby clean power supply is to the electrical network no-harmonic wave pollution; Adopt the high-voltage bus transmission simultaneously, thereby reduced loss, increased conversion efficiency.
Description of drawings
Fig. 1 is the structural representation that LED of the present invention shows module power supply topological system.
Fig. 2 is power pack filter rectification and the pfc circuit block diagram that LED of the present invention shows module power supply topological system.
Fig. 3 is the principle schematic that LED of the present invention shows the accessory power supply module of module power supply topological system.
Fig. 4 is the voltage adjustment principle schematic that LED of the present invention shows module power supply topological system.
Fig. 5 is the LED lattice module synoptic diagram that LED of the present invention shows module power supply topological system.
Embodiment
Following content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make a plurality of simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
As shown in Figure 1, the invention provides a kind of LED module power supply topological system, it comprises: AC power input interface 100, AC power filtering and PFC (PowerFactor Correction, power factor correction) module 110, module accessory power supply module 120, dc bus 130, a plurality of primary power transformation loop module 140 and a plurality of LED dot matrix display module 150.
Described AC power input interface 100 can be imported the alternating current of 220V/50HZ or 110V/60HZ, links to each other with PFC module 110 with AC power filtering; 110 pairs of AC power of described AC power filtering and PFC module are carried out filtering, rectification, PFC, output 400V DC voltage, and transfer to module accessory power supply module 120, dc bus 130 and a plurality of primary power transformation loop module 140.
Described dc bus 130 comprises the cable 130-1 and the 130-2 of a pair of 400V DC voltage, flows into from AC power filtering and PFC module 110, is connected to module accessory power supply module 120 and primary power transformation loop module 140 by the branch node; Described module accessory power supply module 120 is the various voltages that become other functional modules such as signal scanning plate, PFC loop and various detections loop to need the voltage transitions on the dc bus 130; Described primary power transformation loop module 140 exports the free voltage that the voltage transitions on the dc bus 130 becomes LED dot matrix display module to need to LED display dot array module 150 then; Described LED dot matrix display module is the pixel-matrix module that various LED fluorescent tubes are powered respectively.
As shown in Figure 2, described AC power filtering and PFC module 110 comprise that filter rectifier and PFC adjust circuit, described filter rectifier is to play a barrier buffer action to what power-supply system was electrically connected with the city, it comprises inductance (L1, L3, L4) and electric capacity (C2, C3, C4, C6), is used for filtering common mode and difference mode signal; This filter rectifier also comprises various safeguard protection elements, as current fuse device (F1), removes surge spike thermistor (R4, R11), and rectification adopts full-bridge rectification pipe (D3) and filter capacitor (C1) to finish filter rectification.Described PFC adjusts adjustment IC (U1) composition that circuit comprises inductance (L2), diode (D2), switch MOS pipe (Q1) and integrated switch MOS pipe, by detecting harmonic wave? produce the antipole harmonic current? the harmonic wave of reversed polarity is injected into the electrical network of pollution, offset influence of harmonic? power network current is reduced into desirable sine wave, thereby realize PFC active correction function, removed the harmonic pollution of the Switching Power Supply of back, produced a high pressure VDC1 simultaneously and give bus whole electrical network.
As shown in Figure 3, described module accessory power supply module 120 is power Switching Power Supplies less than the miniaturization of 30W, U1 the has been integrated adjustment chip of switch MOS pipe, this AC power filtering closely links to each other with PFC module 110, the accessory power supply VCC1 that the elementary auxiliary winding of this Switching Power Supply produces is connected to the power supply pin of chip (U1), for PFC adjusts circuit supply, the voltage of secondary main winding output 5V, be mainly used in to the module scanning board and power, this voltage feeds back to the voltage regulation loop that IC (U2) forms a closed loop by IC (U3), the secondary voltage output that a 12V also is provided is mainly used in to some environmental monitorings, subsidiary function module for power supply such as DC fan.
As shown in Figure 4, described primary power transformation loop module 140 comprises that the power supply main transformer changes circuit 141 and output voltage is adjusted loop 142.Because miniaturization requirement, entire circuit transform power less than 40W, are adjusted so generally select for use the reverse exciting topological circuit to carry out elementary PWM, adopt secondary synchronization rectification output, filtering, close-loop feedback circuit simultaneously, to improve conversion efficiency.Master chip (U5) is that a PWM adjusts chip, diode (D9) and resistance (R32) commutating voltage are given the power supply pin VCC (6 pin) of master chip (U5), diode (D10) and resistance (R35) output drive signal remove driving switch metal-oxide-semiconductor (Q3), R37 and R38 form the Power Limitation holding circuit, and the voltage signal of output terminal transmits back dutycycle and the frequency that FB pin (2 pin) is used for adjusting master chip (U5) output signal by chip (U6); Secondary commutation adopts the mode of synchronous rectification, switch MOS pipe (Q2) is under the effect of pumping signal, open and close synchronously, significantly reduced switching loss, improved efficiency of rectification effectively, output voltage is being under the sample circuit effect at center by chip (U3), has formed a degenerative closed loop with master chip (U5), chip (U61) and transformer device circuitry such as (T2), guarantees the stable output of output voltage V DC2; Adjust loop 142 about output voltage, (12V～36V) is that the power supply main transformer changes circuit 141 and exports output voltage to and adjust loop 142 to VD2, wherein output voltage adjustment loop 142 comprises 3 road BUCK circuit, carry out PWM and adjust output V red (devices such as D12 are formed for U8, L8), the green (U9 of V, L9, devices such as D13 are formed) and V indigo plant (devices such as D14 are formed for U10, L10).Wherein device U8 (U9 and U10) is the adjustment IC of the BUCK circuit of an integrated switch MOS pipe, feedback voltage by adjusting circuit is (by resistance R 46 and R47, R50 and R51, the ratio respectively of R54 and R55 decides), just can adjust the size of stable output voltage arbitrarily.V is red, V is green and the blue LED dot matrix display module 150 that directly exports to of V.
As shown in Figure 5, described LED dot matrix display module 150 comprises by a plurality of LED (RGB etc.), designing requirement according to pixel, the lattice module that becomes the matrix pixel region point to arrange, the present invention requires to divide three road positive supplies to power according to three kinds of different on state characteristics of RGB, and V is red, V is green and V is blue, if more eurypalynous tube load is arranged, then needs to increase the power supply way, if dissimilar fluorescent tube on state characteristic unanimities is then taked the power supply of same road.
LED of the present invention shows that the beneficial effect of module power supply topological system is: by AC power filtering and PFC module, follow-up a plurality of DC-DC translation circuits and electrical network are separated, and have carried out the PFC active correction, thereby cleaning power supply, to the electrical network no-harmonic wave pollution; Adopt simultaneously the high-voltage bus transmission, thereby reduced loss, increased conversion efficiency; The present invention adopts the accessory power supply module to give signal scanning plate, PFC Circuit tuning and the power supply of other functional circuits, can make things convenient for system more effectively to the management of module power; When giving the power supply of LED lattice module, each road output is arbitrarily adjustable, can finely satisfy the actual needs of LED load; LED lattice display module of the present invention adopts the LED lamp to power respectively, thereby greatly reduces the useless power consumption that same voltage brings.
Claims (9)
1. a LED shows module power supply topological system, it is characterized in that: it comprises the AC power input interface, AC power filtering and PFC module, module accessory power supply module, dc bus, a plurality of primary power transformation loop modules and a plurality of LED dot matrix display module, described AC power input interface links to each other with the PFC module with AC power filtering, described AC power filtering is connected with module accessory power supply module and dc bus with the PFC module, described dc bus is connected to module accessory power supply module and primary power transformation loop module, and described primary power transformation loop module is connected with this LED dot matrix display module.
2. LED according to claim 1 shows module power supply topological system, it is characterized in that: the alternating current of described AC power input interface input 220V/50HZ or 110V/60HZ.
3. LED according to claim 1 shows module power supply topological system, it is characterized in that: described AC power filtering and PFC module comprise that filter rectifier and PFC adjust circuit, and described filter rectifier is to play the barrier buffer action to what power-supply system was electrically connected with the city.
4. LED according to claim 3 shows module power supply topological system, it is characterized in that: described PFC adjusts circuit by detecting harmonic wave, produces the antipole harmonic current, and the harmonic wave of reversed polarity is injected in the electrical network.
5. LED according to claim 1 shows module power supply topological system, and it is characterized in that: described module accessory power supply module is the Switching Power Supply of a power less than the miniaturization of 30W.
6. LED according to claim 1 shows module power supply topological system, it is characterized in that: described primary power transformation loop module comprises that the power supply main transformer changes circuit and output voltage is adjusted the loop.
7. LED according to claim 6 shows module power supply topological system, it is characterized in that: described power supply main transformer changes the output voltage that outputs signal to of circuit and adjusts the loop.
8. LED according to claim 6 shows module power supply topological system, it is characterized in that: output voltage is adjusted the loop and is comprised 3 road BUCK circuit, and carrying out PWM, to adjust output control voltage V red, the green and V indigo plant of V.
9. LED according to claim 1 shows module power supply topological system, it is characterized in that: described LED dot matrix display module comprises by a plurality of LED, according to the designing requirement of pixel, and the lattice module that becomes the matrix pixel region point to arrange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910309175XA CN102054429A (en) | 2009-10-30 | 2009-10-30 | Power supply topology system of LED (Light-Emitting Diode) display module |
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| CN200910309175XA CN102054429A (en) | 2009-10-30 | 2009-10-30 | Power supply topology system of LED (Light-Emitting Diode) display module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542929A (en) * | 2011-11-14 | 2012-07-04 | 上海三思电子工程有限公司 | Power supply system of LED display screen |
| CN102819993A (en) * | 2011-06-09 | 2012-12-12 | 四川柏狮光电技术有限公司 | Power supply system of low power consumption light-emitting diode (LED) display module |
| CN103701303A (en) * | 2013-12-29 | 2014-04-02 | 哈尔滨工业大学 | Switching power supply with testability function and testing method thereof |
| CN104036699A (en) * | 2013-04-11 | 2014-09-10 | 威海凯瑞电气技术有限公司 | Novel intelligent evacuation indicator |
| CN104812120A (en) * | 2014-01-24 | 2015-07-29 | 潘佩昌 | Road LED illumination DC power supply method |
| CN105915050A (en) * | 2016-04-28 | 2016-08-31 | 西安航天民芯科技有限公司 | I2C controlled four-channel outputting adjustable power supply managing system |
-
2009
- 2009-10-30 CN CN200910309175XA patent/CN102054429A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819993A (en) * | 2011-06-09 | 2012-12-12 | 四川柏狮光电技术有限公司 | Power supply system of low power consumption light-emitting diode (LED) display module |
| CN102542929A (en) * | 2011-11-14 | 2012-07-04 | 上海三思电子工程有限公司 | Power supply system of LED display screen |
| CN102542929B (en) * | 2011-11-14 | 2017-04-05 | 上海三思电子工程有限公司 | A kind of electric power system of LED display |
| CN104036699A (en) * | 2013-04-11 | 2014-09-10 | 威海凯瑞电气技术有限公司 | Novel intelligent evacuation indicator |
| CN103701303A (en) * | 2013-12-29 | 2014-04-02 | 哈尔滨工业大学 | Switching power supply with testability function and testing method thereof |
| CN103701303B (en) * | 2013-12-29 | 2015-10-21 | 哈尔滨工业大学 | There is Switching Power Supply and the method for testing of measurability function |
| CN104812120A (en) * | 2014-01-24 | 2015-07-29 | 潘佩昌 | Road LED illumination DC power supply method |
| CN105915050A (en) * | 2016-04-28 | 2016-08-31 | 西安航天民芯科技有限公司 | I2C controlled four-channel outputting adjustable power supply managing system |
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Assignee: Shenzhen Konka Video System Engineering Co., Ltd. Assignor: Konka Group Co., Ltd. Contract record no.: 2010440020066 Denomination of invention: Power supply topology system of LED (Light-Emitting Diode) display module License type: Exclusive License Open date: 20110511 Record date: 20100528 |
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Application publication date: 20110511 |