CN1967642B - LED display screen and its power supply system - Google Patents
LED display screen and its power supply system Download PDFInfo
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- CN1967642B CN1967642B CN2005101016900A CN200510101690A CN1967642B CN 1967642 B CN1967642 B CN 1967642B CN 2005101016900 A CN2005101016900 A CN 2005101016900A CN 200510101690 A CN200510101690 A CN 200510101690A CN 1967642 B CN1967642 B CN 1967642B
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Abstract
This invention relates to an LED screen system which can implement switch power supplies turn open in turn, and the screen system includes a number of switch power supplies for the LED screen driver circuit. These switch power supplies connects with AC power in turn, and each switch power supply includes multiple DC output, at least one DC output used to control the electrical connection between other switch power supply and AC power. Adoption of the above structure, all the switch power supplies can in turn automatically connect with the AC power supply, avoiding open simultaneously to causea surge current superpose to impact the electric grid, and preventing the main power switch tripped or even burned, and meanwhile it is easy for the user to timing or remote operate.
Description
[technical field]
The present invention relates to a kind of LED display system, the particularly a kind of LED display system and electric power system thereof of opening successively of realizing to LED display powered switch power supply.
[background technology]
At present, known LED display system is made up of signal processing system, electric power system, display screen unit, electric power system is made up of a total power switch, several independent power source switches, a plurality of Switching Power Supply, total power switch control independent power source switch, each independent power source switch control one or several Switching Power Supplies, each Switching Power Supply is responsible for to one or several display screen unit power supplies.Because Switching Power Supply has bigger surge current (often reaching tens amperes) when opening; if during the LED display system boot all Switching Power Supplies are opened simultaneously; surge current can reach hundreds of even go up kiloampere; the harm of doing like this is: on the one hand electrical network is caused powerful impact; the harm power grid security; surge current is easy to total power switch and independent power source switch be burnt or cause trip protection on the other hand, makes the LED display system can't operate as normal.For fear of excessive surge current, the step of start is usually: open total power switch earlier, open the switch-dividing power supply then one by one.Because each switch-dividing has been controlled several Switching Power Supplies, therefore still there is big surge current (the surge current sums of several Switching Power Supplies of switch-dividing control), the surge current when only opening together than all Switching Power Supplies is little.But this start mode complex operation requires Attended mode, is not easy to realize timed power on/off or remote control switch.
[summary of the invention]
Prior art LED display system boot moment surge current is big in order to solve, the technical matters of start complex operation, the invention provides a kind of LED display system that can open automatically successively to each Switching Power Supply of LED display power supply.
It is big that the present invention solves prior art LED display system boot moment surge current, the technical scheme that technical matters adopted of start complex operation is: a kind of LED display system is provided, this display screen system comprises: a plurality of display units that comprise light emitting diode, be the power supply of described display unit and n+1 (n 〉=1) the individual Switching Power Supply and the individual control circuit of n (n 〉=1) that are connected with AC power, described Switching Power Supply has dc output end, at least one dc output end of the individual Switching Power Supply of n (n 〉=1) is connected on the individual control circuit of n (n 〉=1), controls being electrically connected between the individual Switching Power Supply of n+1 (n 〉=1) and the AC power.
According to a preferred structure of the present invention, control circuit comprises relay, photoelectricity coupled circuit, a kind of in the ghyristor circuit.
According to a preferred structure of the present invention, also comprise the individual independent power source switch of connecting with control circuit respectively of n (n 〉=1).
According to a preferred structure of the present invention, each Switching Power Supply is connected with AC power by total power switch.
The present invention solves the prior art LED display system boot moment surge current technical scheme that technical matters adopted big, the complex operation of starting shooting: a kind of electric power system is provided, electric power system comprises n+1 (n 〉=1) individual Switching Power Supply and the individual control circuit of n (n 〉=1) that is connected with AC power successively, described Switching Power Supply has dc output end respectively, at least one dc output end of the individual Switching Power Supply of n (n 〉=1) is connected on the individual control circuit of n (n 〉=1), controls being electrically connected between the individual Switching Power Supply of n+1 (n 〉=1) and the described AC power.
According to a preferred structure of the present invention, the dc controlled switch comprises relay, photoelectricity coupled circuit, a kind of in the ghyristor circuit.
According to a preferred structure of the present invention, electric power system also comprises the individual independent power source switch of connecting with control circuit respectively of n (n 〉=1).
According to a preferred structure of the present invention, each Switching Power Supply is connected with AC power by total power switch.
When adopting the foregoing circuit structure, when the LED display system does not work, the independent power source switch of total power switch and each Switching Power Supply is in off-state, when the LED display system boot, the total power switch closure, first Switching Power Supply is at first worked, output dc voltage is given first control circuit, first control circuit work, connect the AC power input of second Switching Power Supply, second Switching Power Supply started working, and the rest may be inferred, each Switching Power Supply is worked successively, because the time that each Switching Power Supply starts is at synchronization, thus the surge current stack when having avoided each Switching Power Supply to start, simultaneously, owing to only need the master switch just can opening and closing whole LED display screen system, so be easy to realize timed power on/off or Long-distance Control.
[description of drawings]
Fig. 1 is the circuit theory diagrams of first embodiment of the invention.
[embodiment]
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1, Fig. 1 is the circuit diagram of LED display electric power system of the present invention.In the present embodiment, the electric power system of LED display has the individual Switching Power Supply T1 to Tn+1 that is connected with AC power by total power switch S1 of n+1 (n 〉=1).In this electric power system, comprise also that n relay J 1 to Jn and n connect with relay J 1 to Jn respectively independent power source K switch 1 to Kn.The dc output end of the first Switching Power Supply T1 is connected on the coil of first relay J 1, first relay J 1 according to the output of the direct current of this dc output end because being electrically connected between control second switch power supply T2 and the AC power.By that analogy, be connected on the coil of n relay J n, so that being electrically connected between control switching Tn+1 and the AC power from the dc output end of n Switching Power Supply.
When LED display is started shooting, open total power switch S1, the first Switching Power Supply T1 at first works, after its operate as normal (this moment, surge current was over and done with), export a DC voltage to the coil of first relay J 1,1 adhesive of first relay J, the closing of contact is connected the incoming line that exchanges between second switch power supply T2 and the AC power.By that analogy, after having only n Switching Power Supply operate as normal, n+1 Switching Power Supply just can be worked, like this, all Switching Power Supplies start successively, have avoided them to start at synchronization and have caused the surge current stack that electrical network is impacted, causes the total power switch tripping operation even burn.When operate as normal, first all should be in off-state to n independent power source K switch 1 to Kn, the effect of independent power source K switch 1 to Kn is: when the Switching Power Supply of a certain relay of control breaks down cisco unity malfunction, as long as open corresponding independent power source switch, still back one Switching Power Supply can be connected on the AC power, make it still can operate as normal.
In the above-described embodiments, control circuit is not limited to relay, can adopt other known dc controlled switch to connect Switching Power Supply and AC power equally, as photoelectricity coupled circuit, ghyristor circuit etc.And circuit connecting mode is not limited to form shown in Figure 1, when the surge current of single switch power supply is very little, can utilize a control circuit to control a plurality of Switching Power Supplies respectively, to reach the purpose of faster open system.
It is emphasized that can be from any one direct current of Switching Power Supply output extraction voltage supply control circuit, and this dc output end can also continue as the display screen power supply simultaneously, that is to say that control circuit do not monopolize a dc output end mouth of Switching Power Supply.
Above-mentioned detailed description only is exemplary description, and those skilled in the art can design various embodiments according to different actual needs under the situation of the scope and spirit that do not break away from the present invention and protected.
Claims (8)
1. LED display system, described display screen system comprises: a plurality of display units that comprise light emitting diode, be described display unit power supply and n+1 Switching Power Supply and n control circuit of being connected with AC power, described Switching Power Supply has dc output end, it is characterized in that: at least one dc output end of n Switching Power Supply is connected on n the control circuit, control being electrically connected between n+1 Switching Power Supply and the AC power, wherein, described n 〉=1.
2. LED display according to claim 1 system is characterized in that: described control circuit comprises a kind of in relay, photoelectricity coupled circuit, the ghyristor circuit.
3. LED display according to claim 2 system is characterized in that: also comprise n independent power source switch in parallel with described control circuit respectively, wherein, described n 〉=1.
4. according to any described LED display system of claim 1 to 3, it is characterized in that: described Switching Power Supply is connected with described AC power by total power switch.
5. electric power system, described electric power system comprises n+1 (n 〉=1) individual Switching Power Supply and n the control circuit that is connected with AC power successively, described Switching Power Supply has dc output end respectively, it is characterized in that: at least one dc output end of n Switching Power Supply is connected on n the control circuit, control being electrically connected between n+1 Switching Power Supply and the described AC power, wherein, described n 〉=1.
6. electric power system according to claim 5 is characterized in that: described control circuit comprises a kind of in relay, photoelectricity coupled circuit, the ghyristor circuit.
7. electric power system according to claim 5 is characterized in that: also comprise the independent power source switch in parallel with described control circuit.
8. according to any described electric power system of claim 5-7, it is characterized in that: described Switching Power Supply is connected with described AC power by total power switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101016900A CN1967642B (en) | 2005-11-19 | 2005-11-19 | LED display screen and its power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101016900A CN1967642B (en) | 2005-11-19 | 2005-11-19 | LED display screen and its power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1967642A CN1967642A (en) | 2007-05-23 |
| CN1967642B true CN1967642B (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101016900A Active CN1967642B (en) | 2005-11-19 | 2005-11-19 | LED display screen and its power supply system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316643A (en) * | 2011-08-22 | 2012-01-11 | 徐剑雄 | New-energy-resource advertisement board illumination system |
| CN103021357B (en) * | 2012-12-05 | 2015-08-05 | 江苏清投视讯科技有限公司 | A kind of LCD splicing large screen grouping power supply control apparatus |
| CN103761927A (en) * | 2013-11-08 | 2014-04-30 | 合肥瑞华电子科技有限责任公司 | Bottom beam structure for display screen |
| CN111505946B (en) | 2019-01-31 | 2021-11-19 | 华为终端有限公司 | Equipment control method and equipment |
| CN111341242B (en) | 2020-04-09 | 2021-09-03 | Tcl华星光电技术有限公司 | Circuit driving system, driving chip and display device |
| CN113629987A (en) * | 2021-08-03 | 2021-11-09 | 深圳市康佳壹视界商业显示有限公司 | LED screen electrical control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086655A (en) * | 1993-10-11 | 1994-05-11 | 田立军 | Computer-controlled light-changing device of metal halid projecting lamp |
| CN1533165A (en) * | 2003-03-25 | 2004-09-29 | 乐金电子（沈阳）有限公司 | Power on sequence method of plasma TV set |
| US20040227404A1 (en) * | 2003-05-12 | 2004-11-18 | Boros Mircea Cristian | Controlling devices using cascaded control units |
-
2005
- 2005-11-19 CN CN2005101016900A patent/CN1967642B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086655A (en) * | 1993-10-11 | 1994-05-11 | 田立军 | Computer-controlled light-changing device of metal halid projecting lamp |
| CN1533165A (en) * | 2003-03-25 | 2004-09-29 | 乐金电子（沈阳）有限公司 | Power on sequence method of plasma TV set |
| US20040227404A1 (en) * | 2003-05-12 | 2004-11-18 | Boros Mircea Cristian | Controlling devices using cascaded control units |
Non-Patent Citations (2)
| Title |
|---|
| 毛永琳.户外LED显示屏开关电源的设计.现代显示 1.2001,(1),31-34. |
| 毛永琳.户外LED显示屏开关电源的设计.现代显示 1.2001,(1),31-34. * |
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| Publication number | Publication date |
|---|---|
| CN1967642A (en) | 2007-05-23 |
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