CN109474190A - A kind of LED display power supply unit and system - Google Patents
A kind of LED display power supply unit and system Download PDFInfo
- Publication number
- CN109474190A CN109474190A CN201811496745.6A CN201811496745A CN109474190A CN 109474190 A CN109474190 A CN 109474190A CN 201811496745 A CN201811496745 A CN 201811496745A CN 109474190 A CN109474190 A CN 109474190A
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- China
- Prior art keywords
- circuit
- led display
- electrically connected
- transformer
- input terminal
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of El Displays (AREA)
Abstract
The present invention relates to a kind of LED display power supply unit and system, device includes host and at least one slave, and the input terminal of host is electrically connected with external alternating current；Slave includes transformer, magnetic amplifier, circuit of synchronous rectification and LC filter, the both ends of the primary coil of transformer are electrically connected as input terminal with the output end of host, one of secondary coil of transformer is electrically connected with the input terminal of magnetic amplifier, magnetic amplifier, circuit of synchronous rectification are pierced by with LC filter circuit and connect, LC filter circuit is electrically connected with LED display module, another secondary coil of transformer is electrically connected with circuit of synchronous rectification.Power supply unit of the invention converts high frequency square wave for ac commercial power voltage by transformer, magnetic amplifier is supplied electricity to all the way, magnetic amplifier carries out duty ratio adjustment by magnetic saturation area, realize pressure stabilizing, another way directly drives circuit of synchronous rectification, it is not necessary that rectification driving chip is separately provided, circuit structure is simple, high reliablity, difficulty of construction is low, easy to maintain.
Description
Technical field
The present invention relates to electronic circuit technology field more particularly to a kind of LED display power supply units and system.
Background technique
Existing LED display power-supply system is by alternating current 220V input voltage, by AC/DC converter, and each AC/
DC inverter power is in 200W or so；Exchange conversion is passed through 2.5m ㎡ at the direct current of 5V, then by 5V DC voltage by converter
Cable be connected to display panel module.As shown in Figure 1, power supply provides power frequency 220V AC voltage；AC/DC converter will be handed over
Stream 220V is transformed into the 5V DC voltage of isolation；LED display module standard part, the difference of the size of display screen can pass through
The parallel connection of AC/DC converter is extended, and is extended to n by 1.But the power-supply system has following shortcoming:
1, supply convertor needs to install close to frame, and difficulty of construction is big, and wiring is complicated, more with line number amount；
2, single inverter efficiency is generally 0.8, and when multiple be installed in parallel, system bulk supply efficiency far is lower than
0.8, also need special configuration air-conditioning heat dissipation；
3, system redundancy is not high, no parallel connection, and power failure rate is high in use, poor reliability；
4, LED large-size screen monitors are typically mounted at eminence, and power module cost in replacement and maintenance is quite high.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide a kind of confessions of LED display
Electric installation and system.
The technical scheme to solve the above technical problems is that a kind of LED display power supply unit, including host and
At least one slave, the input terminal of the host are electrically connected with external alternating current；The slave includes transformer T, magnetic amplifier, same
Walk rectification circuit and LC filter, output end of the both ends of the primary coil of the transformer T as input terminal and the host
Electrical connection, input of the both ends of one of secondary coil of the transformer T as one group of output end and the magnetic amplifier
End electrical connection, the output end of the magnetic amplifier is electrically connected with an input terminal of the circuit of synchronous rectification, it is described synchronize it is whole
The output end of current circuit is electrically connected with the input terminal of the LC filter circuit, and the output end and LED of the LC filter circuit are shown
The power input of module is electrically connected, and the both ends of another secondary coil of the transformer T are as another group of output end and institute
State another input terminal electrical connection of circuit of synchronous rectification.
The beneficial effects of the present invention are: converting high frequency square wave for ac commercial power voltage by transformer, supply electricity to all the way
Magnetic amplifier, magnetic amplifier carry out duty ratio adjustment by magnetic saturation area, realize pressure stabilizing, and another way directly drives synchronous rectification electricity
Road, by circuit of synchronous rectification, to magnetic amplifier, treated that high frequency square wave rectifies, then is filtered by LC filter flat
Sliding processing exports 5V DC voltage and powers for the LED display, it is not necessary that rectification driving chip, circuit structure is separately provided
Simply, cost is relatively low, and the reliability of circuit is higher, and difficulty of construction is lower, easy to maintain.
Based on the above technical solution, the present invention can also be improved as follows:
Further, the quantity of the slave is multiple, and the LED display module includes identical with the slave quantity
LED display, the output end of the LC filter circuit of the slave are electrically connected with the power input of the corresponding LED display
It connects.
The beneficial effect of above-mentioned further scheme is: being the power supply of corresponding LED display by multiple slaves, may be implemented
The extension of LED display module, to meet the display screen demand of different sizes and specification.
The present invention also provides a kind of LED display power supply systems, including multiple LED display power supply units.
Detailed description of the invention
Fig. 1 is display screen power supply unit structural schematic diagram in the prior art；
Fig. 2 is LED display power supply unit structural schematic diagram of the invention；
Fig. 3 is slave electrical block diagram of the invention.
In attached drawing, parts list represented by the reference numerals are as follows:
1, host, 2, slave, 3, LED display module, 4, LED display.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Fig. 2, a kind of LED display power supply unit, including host 1 and at least one slave 2, the host 1
Input terminal is electrically connected with external alternating current.
As shown in figure 3, the slave 2 includes transformer T, magnetic amplifier, circuit of synchronous rectification and LC filter, the change
The both ends of the primary coil of depressor T are electrically connected as input terminal with the output end of the host 1, and wherein the one of the transformer T
The both ends of a secondary coil are electrically connected as one group of output end with the input terminal of the magnetic amplifier, the output of the magnetic amplifier
End is electrically connected with an input terminal of the circuit of synchronous rectification, the output end of the circuit of synchronous rectification and the LC filtered electrical
The input terminal on road is electrically connected, and the output end of the LC filter circuit is electrically connected with the power input of LED display module 3, described
Another input terminal of the both ends of another secondary coil of transformer T as another group of output end and the circuit of synchronous rectification
Electrical connection.
LED display power supply unit of the invention converts high frequency square wave for ac commercial power voltage by transformer, all the way
Magnetic amplifier is supplied electricity to, magnetic amplifier carries out duty ratio adjustment by magnetic saturation area, realizes pressure stabilizing, and another way directly drives synchronization
Rectification circuit, by circuit of synchronous rectification, to magnetic amplifier, treated that high frequency square wave rectifies, then is carried out by LC filter
Filtering processing exports 5V DC voltage and powers for the LED display, it is not necessary that rectification driving chip is separately provided, electricity
Line structure is simple, and cost is relatively low, and the reliability of circuit is higher, and difficulty of construction is lower, easy to maintain.
In embodiment provided by the invention, the quantity of the slave 2 is multiple, and the LED display module 3 includes and institute
The identical LED display 4 of 2 quantity of slave is stated, the output end of the LC filter circuit of the slave 2 is shown with the corresponding LED
The power input electrical connection of screen 4.It is the power supply of corresponding LED display 4 by multiple slaves 2, LED display module may be implemented
3 arbitrary extension, to meet the display screen demand of different sizes and specification.
In embodiment provided by the invention, the power of the host 1 is 1KW, efficiency 98%, input AC 220V voltage,
High frequency square wave is exported, can greatly facilitate the magnetic amplifier and circuit of synchronous rectification of subsequent slave 2 in this way, save and be separately provided
Synchronous rectification driving chip, circuit safety is simple, and electric current is big, reduces cost, increases reliability.
The power of the slave 2 is 20-40W, inputs high frequency square wave, and magnetic amplifier adjusts high frequency by magnetic saturation area size
Duty cycle square wave, with reaching pressure stabilizing mesh, and another way high frequency square wave directly drives circuit of synchronous rectification, circuit of synchronous rectification pair
High frequency square wave is rectified, then is filtered smoothing processing by LC filter, is finally exported 5V DC voltage and is shown for the LED
Display screen 4 is powered.
In practice, according to the different demands of LED screen size, can be met by the extension in parallel of multiple slaves 2.For
The installation of outdoor large-size screen monitors, area power expansion are convenient, and slave adheres to pinnacled LED screen module frame when installation, and route is saved,
Wiring is beautiful, Maintenance free, and host can be placed under can operate place, tour is easy to maintain.
In the present invention, the magnetic amplifier uses the satiable inductor of high magnetic permeability closed magnetic circuit magnetic core, is equivalent to one
Switch, magnetic switch is connected when saturation, and magnetic switch ends when unsaturated.The circuit of synchronous rectification uses metal-oxide-semiconductor, greatly reduces
Loss when traditional diode rectification, eliminates electrolytic capacitor, circuit high efficient and reliable is non-maintaining.
LED screen power supply unit of the invention by the way that slave 2 will be formed by several passive devices and in the device of operating on low voltage,
And be installed together slave 2 with LED display 4, high reliablity, failure rate is low, and host 1 can be installed separately, and is placed in easily
In the place of maintenance.Certain host 1 is high-efficient, and loss is small, and failure rate is also low.
In addition, LED screen power supply unit of the invention reduces difficulty in terms of construction, reduce wire rod, can not have to special
Radiator, reduce cost, there is considerable economic benefit, while entire power supply system is high-efficient, maintenance is few, and when safeguarding
Also more convenient.
The present invention also provides a kind of LED display power supply systems, including multiple LED display power supply units.
In practice, when 1 power of host is more than 1KW, different LED screens can be realized by the extension in parallel of multiple main frames 1
The demand of curtain size.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of LED display power supply unit, it is characterised in that: including host (1) and at least one slave (2), the host
(1) input terminal is electrically connected with external alternating current；
The slave (2) includes transformer T, magnetic amplifier, circuit of synchronous rectification and LC filter, the primary of the transformer T
The both ends of coil are electrically connected as input terminal with the output end of the host (1), one of secondary coil of the transformer T
Both ends be electrically connected as one group of output end with the input terminal of the magnetic amplifier, the output end of the magnetic amplifier and described same
Walk the input terminal electrical connection of rectification circuit, the input terminal of the output end of the circuit of synchronous rectification and the LC filter circuit
Electrical connection, the output end of the LC filter circuit are electrically connected with the power input of LED display module (3), the transformer T's
The both ends of another secondary coil are electrically connected as another group of output end with another input terminal of the circuit of synchronous rectification.
2. LED display power supply unit according to claim 1, it is characterised in that: the quantity of the slave (2) is more
It is a, and the LED display module (3) includes LED display (4) identical with the slave (2) quantity, the slave (2)
The output end of LC filter circuit is electrically connected with the power input of the corresponding LED display (4).
3. a kind of LED display power supply system, it is characterised in that: supplied including multiple LED displays of any of claims 1 or 2
Electric installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496745.6A CN109474190A (en) | 2018-12-07 | 2018-12-07 | A kind of LED display power supply unit and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496745.6A CN109474190A (en) | 2018-12-07 | 2018-12-07 | A kind of LED display power supply unit and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109474190A true CN109474190A (en) | 2019-03-15 |
Family
ID=65674976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811496745.6A Withdrawn CN109474190A (en) | 2018-12-07 | 2018-12-07 | A kind of LED display power supply unit and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109474190A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005112245A1 (en) * | 2004-05-17 | 2005-11-24 | Sony Corporation | Power supply device and display device |
| US20060274024A1 (en) * | 2005-06-02 | 2006-12-07 | Au Optronics Corp. | Liquid crystal display and light emitting diode drive circuit thereof |
| US20100001661A1 (en) * | 2008-07-01 | 2010-01-07 | Delta Electronics, Inc. | Led current-supplying circuit and led current-controlling circuit |
| CN101697455A (en) * | 2009-11-03 | 2010-04-21 | 上海金陵时威科技发展股份有限公司 | Power supply system and power supply method for LED electronic display screen |
| CN204010627U (en) * | 2014-06-04 | 2014-12-10 | 天一宏业武汉科技发展有限公司 | The LED display system of distributed power source power supply |
| CN105429488A (en) * | 2015-12-16 | 2016-03-23 | 中国电子科技集团公司第四十三研究所 | A self-feedback circuit of switching power supply based on magnetic amplifier and its control method |
| CN106972763A (en) * | 2017-05-19 | 2017-07-21 | 广西南宁红运高照电子科技有限公司 | A kind of LED power |
| CN209170238U (en) * | 2018-12-07 | 2019-07-26 | 湖北集润科技有限公司 | A kind of LED display power supply unit and system |
-
2018
- 2018-12-07 CN CN201811496745.6A patent/CN109474190A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005112245A1 (en) * | 2004-05-17 | 2005-11-24 | Sony Corporation | Power supply device and display device |
| US20060274024A1 (en) * | 2005-06-02 | 2006-12-07 | Au Optronics Corp. | Liquid crystal display and light emitting diode drive circuit thereof |
| US20100001661A1 (en) * | 2008-07-01 | 2010-01-07 | Delta Electronics, Inc. | Led current-supplying circuit and led current-controlling circuit |
| CN101697455A (en) * | 2009-11-03 | 2010-04-21 | 上海金陵时威科技发展股份有限公司 | Power supply system and power supply method for LED electronic display screen |
| CN204010627U (en) * | 2014-06-04 | 2014-12-10 | 天一宏业武汉科技发展有限公司 | The LED display system of distributed power source power supply |
| CN105429488A (en) * | 2015-12-16 | 2016-03-23 | 中国电子科技集团公司第四十三研究所 | A self-feedback circuit of switching power supply based on magnetic amplifier and its control method |
| CN106972763A (en) * | 2017-05-19 | 2017-07-21 | 广西南宁红运高照电子科技有限公司 | A kind of LED power |
| CN209170238U (en) * | 2018-12-07 | 2019-07-26 | 湖北集润科技有限公司 | A kind of LED display power supply unit and system |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190315 |
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| WW01 | Invention patent application withdrawn after publication |